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a30a2ebf29db4885da330f456a727ead28af55ca
tubestation/layout/base/nsCSSFrameConstructor.cpp
bmlk@gmx.de a30a2ebf29 - decouple xul iframes from the browser.frames.enabled preference, so that one can open mozilla if that preference is set to false bug 107911 
- avoid mutating style inside frame constructor for noframes bug 240129, this fixes crashes like bug 281333 and  bug 266222
- ConstructFrame does not append children if it fails, thats good enough for tables, so don't care about foreign children if they fail, this prevents tables from going into panic mode. bug 283147
- a display: table-caption behaves like a block for other table frames created below. bug 281527
r/sr= bzbarsky
2005-03-03 18:04:38 +00:00

13592 lines
503 KiB
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:ts=2:et:sw=2:
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Dan Rosen <dr@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCSSFrameConstructor.h"
#include "nsCRT.h"
#include "nsIAtom.h"
#include "nsIURL.h"
#include "nsISupportsArray.h"
#include "nsHashtable.h"
#include "nsIStyledContent.h"
#include "nsIHTMLDocument.h"
#include "nsIStyleRule.h"
#include "nsIFrame.h"
#include "nsHTMLAtoms.h"
#include "nsPresContext.h"
#include "nsILinkHandler.h"
#include "nsIDocument.h"
#include "nsTableFrame.h"
#include "nsTableColGroupFrame.h"
#include "nsTableColFrame.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIDOMHTMLTableColElement.h"
#include "nsIDOMHTMLTableCaptionElem.h"
#include "nsTableCellFrame.h" // to get IS_CELL_FRAME
#include "nsHTMLParts.h"
#include "nsIPresShell.h"
#include "nsStyleSet.h"
#include "nsIViewManager.h"
#include "nsIScrollableView.h"
#include "nsStyleConsts.h"
#include "nsTableOuterFrame.h"
#include "nsIDOMXULElement.h"
#include "nsHTMLContainerFrame.h"
#include "nsINameSpaceManager.h"
#include "nsLayoutAtoms.h"
#include "nsIDOMHTMLSelectElement.h"
#include "nsIDOMHTMLLegendElement.h"
#include "nsIComboboxControlFrame.h"
#include "nsIListControlFrame.h"
#include "nsISelectControlFrame.h"
#include "nsIRadioControlFrame.h"
#include "nsICheckboxControlFrame.h"
#include "nsIDOMCharacterData.h"
#include "nsIDOMHTMLImageElement.h"
#include "nsITextContent.h"
#include "nsPlaceholderFrame.h"
#include "nsTableRowGroupFrame.h"
#include "nsStyleChangeList.h"
#include "nsIFormControl.h"
#include "nsCSSAnonBoxes.h"
#include "nsCSSPseudoElements.h"
#include "nsIDeviceContext.h"
#include "nsTextFragment.h"
#include "nsISupportsArray.h"
#include "nsIAnonymousContentCreator.h"
#include "nsFrameManager.h"
#include "nsLegendFrame.h"
#include "nsIContentIterator.h"
#include "nsBoxLayoutState.h"
#include "nsIBindingManager.h"
#include "nsXBLBinding.h"
#include "nsITheme.h"
#include "nsContentCID.h"
#include "nsContentUtils.h"
#include "nsIDocShell.h"
#include "nsObjectFrame.h"
#include "nsRuleNode.h"
#include "nsIDOMMutationEvent.h"
#include "nsChildIterator.h"
#include "nsCSSRendering.h"
#include "nsISelectElement.h"
#include "nsLayoutErrors.h"
#include "nsLayoutUtils.h"
#include "nsAutoPtr.h"
#include "nsXULAtoms.h"
#include "nsBoxFrame.h"
#include "nsScrollBoxFrame.h"
#include "nsIBoxLayout.h"
#ifdef MOZ_ENABLE_CAIRO
#include "nsCanvasFrame.h"
#endif
static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
#include "nsIDOMWindowInternal.h"
#include "nsIMenuFrame.h"
#include "nsBox.h"
#ifdef MOZ_XUL
#include "nsIRootBox.h"
#include "nsIDOMXULCommandDispatcher.h"
#include "nsIDOMXULDocument.h"
#include "nsIXULDocument.h"
#endif
#include "nsInlineFrame.h"
#include "nsBlockFrame.h"
#include "nsIScrollableFrame.h"
#include "nsIXBLService.h"
#include "nsIStyleRuleSupplier.h"
#undef NOISY_FIRST_LETTER
#ifdef MOZ_MATHML
#include "nsMathMLAtoms.h"
#include "nsMathMLParts.h"
#endif
#ifdef MOZ_XTF
#include "nsIXTFElement.h"
#include "nsIXTFElementWrapperPrivate.h"
#include "nsIXTFVisualWrapperPrivate.h"
nsresult
NS_NewXTFXULDisplayFrame(nsIPresShell*, nsIFrame**);
nsresult
NS_NewXTFXMLDisplayFrame(nsIPresShell*, PRBool isBlock, nsIFrame**);
#ifdef MOZ_SVG
nsresult
NS_NewXTFSVGDisplayFrame(nsIPresShell*, nsIContent*, nsIFrame**);
#endif
#endif
#ifdef MOZ_SVG
#include "nsSVGAtoms.h"
#include "nsISVGTextContainerFrame.h"
#include "nsISVGContainerFrame.h"
#include "nsStyleUtil.h"
nsresult
NS_NewSVGOuterSVGFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGInnerSVGFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGPolylineFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGPolygonFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGCircleFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGEllipseFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGLineFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGRectFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGGFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGGenericContainerFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGForeignObjectFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGPathFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGGlyphFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame* parent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGTextFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGTSpanFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame* parent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGDefsFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
nsresult
NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
PRBool
NS_SVG_TestFeatures (const nsAString& value);
extern nsresult
NS_NewSVGLinearGradientFrame(nsIPresShell *aPresShell, nsIContent *aContent, nsIFrame** newFrame);
extern nsresult
NS_NewSVGRadialGradientFrame(nsIPresShell *aPresShell, nsIContent *aContent, nsIFrame** newFrame);
extern nsresult
NS_NewSVGStopFrame(nsIPresShell *aPresShell, nsIContent *aContent, nsIFrame *aParentFrame, nsIFrame** newFrame);
nsresult
NS_NewSVGMarkerFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
extern nsresult
NS_NewSVGImageFrame(nsIPresShell *aPresShell, nsIContent *aContent, nsIFrame** newFrame);
nsresult
NS_NewSVGClipPathFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
// defined in nsSVGElementFactory.cpp
extern PRBool SVGEnabled();
#endif
#include "nsIDocument.h"
#include "nsIDOMElement.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMDocument.h"
#include "nsIDOMDocumentXBL.h"
#include "nsIScrollable.h"
#include "nsINodeInfo.h"
#include "prenv.h"
#include "nsWidgetsCID.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
// Global object maintenance
nsIXBLService * nsCSSFrameConstructor::gXBLService = nsnull;
// Global prefs
static PRBool gGotXBLFormPrefs = PR_FALSE;
static PRBool gUseXBLForms = PR_FALSE;
#ifdef DEBUG
// Set the environment variable GECKO_FRAMECTOR_DEBUG_FLAGS to one or
// more of the following flags (comma separated) for handy debug
// output.
static PRBool gNoisyContentUpdates = PR_FALSE;
static PRBool gReallyNoisyContentUpdates = PR_FALSE;
static PRBool gNoisyInlineConstruction = PR_FALSE;
static PRBool gVerifyFastFindFrame = PR_FALSE;
struct FrameCtorDebugFlags {
const char* name;
PRBool* on;
};
static FrameCtorDebugFlags gFlags[] = {
{ "content-updates", &gNoisyContentUpdates },
{ "really-noisy-content-updates", &gReallyNoisyContentUpdates },
{ "noisy-inline", &gNoisyInlineConstruction },
{ "fast-find-frame", &gVerifyFastFindFrame },
};
#define NUM_DEBUG_FLAGS (sizeof(gFlags) / sizeof(gFlags[0]))
#endif
#ifdef MOZ_XUL
#include "nsMenuFrame.h"
#include "nsPopupSetFrame.h"
#include "nsTreeColFrame.h"
#include "nsIBoxObject.h"
#include "nsIListBoxObject.h"
#include "nsListBoxBodyFrame.h"
#include "nsListItemFrame.h"
//------------------------------------------------------------------
nsresult
NS_NewAutoRepeatBoxFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame);
nsresult
NS_NewRootBoxFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame);
nsresult
NS_NewDocElementBoxFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);
nsresult
NS_NewThumbFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewDeckFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame, nsIBoxLayout* aLayoutManager = nsnull);
nsresult
NS_NewLeafBoxFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewStackFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame, nsIBoxLayout* aLayoutManager = nsnull);
nsresult
NS_NewProgressMeterFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewImageBoxFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewTextBoxFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewGroupBoxFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewButtonBoxFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame);
nsresult
NS_NewGrippyFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewSplitterFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewMenuPopupFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewPopupSetFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);
nsresult
NS_NewScrollBoxFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);
nsresult
NS_NewMenuFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRUint32 aFlags );
nsresult
NS_NewMenuBarFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewTreeBodyFrame (nsIPresShell* aPresShell, nsIFrame** aNewFrame);
#ifdef MOZ_ENABLE_CAIRO
nsresult
NS_NewCanvasXULFrame (nsIPresShell* aPresShell, nsIFrame** aNewFrame);
#endif
// grid
nsresult
NS_NewGridLayout2 ( nsIPresShell* aPresShell, nsIBoxLayout** aNewLayout );
nsresult
NS_NewGridRowLeafLayout ( nsIPresShell* aPresShell, nsIBoxLayout** aNewLayout );
nsresult
NS_NewGridRowLeafFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRBool aIsRoot, nsIBoxLayout* aLayout);
nsresult
NS_NewGridRowGroupLayout ( nsIPresShell* aPresShell, nsIBoxLayout** aNewLayout );
nsresult
NS_NewGridRowGroupFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRBool aIsRoot, nsIBoxLayout* aLayout);
nsresult
NS_NewListBoxLayout ( nsIPresShell* aPresShell, nsCOMPtr<nsIBoxLayout>& aNewLayout );
// end grid
nsresult
NS_NewTitleBarFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame);
nsresult
NS_NewResizerFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame);
#endif
nsresult
NS_NewHTMLScrollFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRBool aIsRoot);
nsresult
NS_NewXULScrollFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRBool aIsRoot);
nsresult
NS_NewSliderFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewScrollbarFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewScrollbarButtonFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
nsresult
NS_NewNativeScrollbarFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
#ifdef NOISY_FINDFRAME
static PRInt32 FFWC_totalCount=0;
static PRInt32 FFWC_doLoop=0;
static PRInt32 FFWC_doSibling=0;
static PRInt32 FFWC_recursions=0;
static PRInt32 FFWC_nextInFlows=0;
static PRInt32 FFWC_slowSearchForText=0;
#endif
#ifdef MOZ_SVG
// Test to see if this language is supported
static PRBool
SVG_TestLanguage(const nsSubstring& lstr, const nsSubstring& prefs)
{
// Compare list to attribute value, which may be a list
// According to the SVG 1.1 Spec (at least as I read it), we should take
// the first attribute value and check it for any matches in the users
// preferences, including any prefix matches.
// This algorithm is O(M*N)
PRInt32 vbegin = 0;
PRInt32 vlen = lstr.Length();
while (vbegin < vlen) {
PRInt32 vend = lstr.FindChar(PRUnichar(','), vbegin);
if (vend == kNotFound) {
vend = vlen;
}
PRInt32 gbegin = 0;
PRInt32 glen = prefs.Length();
while (gbegin < glen) {
PRInt32 gend = prefs.FindChar(PRUnichar(','), gbegin);
if (gend == kNotFound) {
gend = glen;
}
const nsDefaultStringComparator defaultComparator;
const nsStringComparator& comparator =
NS_STATIC_CAST(const nsStringComparator&, defaultComparator);
if (nsStyleUtil::DashMatchCompare(Substring(lstr, vbegin, vend-vbegin),
Substring(prefs, gbegin, gend-gbegin),
comparator)) {
return PR_TRUE;
}
gbegin = gend + 1;
}
vbegin = vend + 1;
}
return PR_FALSE;
}
#endif
//----------------------------------------------------------------------
//
// When inline frames get weird and have block frames in them, we
// annotate them to help us respond to incremental content changes
// more easily.
static inline PRBool
IsFrameSpecial(nsIFrame* aFrame)
{
return (aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL) != 0;
}
static void
GetSpecialSibling(nsFrameManager* aFrameManager, nsIFrame* aFrame, nsIFrame** aResult)
{
// We only store the "special sibling" annotation with the first
// frame in the flow. Walk back to find that frame now.
aFrame = aFrame->GetFirstInFlow();
void* value = aFrame->GetProperty(nsLayoutAtoms::IBSplitSpecialSibling);
*aResult = NS_STATIC_CAST(nsIFrame*, value);
}
static nsIFrame*
GetLastSpecialSibling(nsFrameManager* aFrameManager, nsIFrame* aFrame)
{
for (nsIFrame *frame = aFrame, *next; ; frame = next) {
GetSpecialSibling(aFrameManager, frame, &next);
if (!next)
return frame;
}
NS_NOTREACHED("unreachable code");
return nsnull;
}
// Get the frame's next-in-flow, or, if it doesn't have one,
// its special sibling.
static nsIFrame*
GetNifOrSpecialSibling(nsFrameManager *aFrameManager, nsIFrame *aFrame)
{
nsIFrame *result = aFrame->GetNextInFlow();
if (result)
return result;
if (IsFrameSpecial(aFrame))
GetSpecialSibling(aFrameManager, aFrame, &result);
return result;
}
static void
SetFrameIsSpecial(nsIFrame* aFrame, nsIFrame* aSpecialSibling)
{
NS_PRECONDITION(aFrame, "bad args!");
// Mark the frame and all of its siblings as "special".
for (nsIFrame* frame = aFrame; frame != nsnull; frame = frame->GetNextInFlow()) {
frame->AddStateBits(NS_FRAME_IS_SPECIAL);
}
if (aSpecialSibling) {
// We should be the first-in-flow
NS_ASSERTION(!aFrame->GetPrevInFlow(),
"assigning special sibling to other than first-in-flow!");
// Store the "special sibling" (if we were given one) with the
// first frame in the flow.
aFrame->SetProperty(nsLayoutAtoms::IBSplitSpecialSibling, aSpecialSibling);
}
}
static nsIFrame*
GetIBContainingBlockFor(nsIFrame* aFrame)
{
NS_PRECONDITION(IsFrameSpecial(aFrame),
"GetIBContainingBlockFor() should only be called on known IB frames");
// Get the first "normal" ancestor of the target frame.
nsIFrame* parentFrame;
do {
parentFrame = aFrame->GetParent();
if (! parentFrame) {
NS_ERROR("no unsplit block frame in IB hierarchy");
return aFrame;
}
if (!IsFrameSpecial(parentFrame))
break;
aFrame = parentFrame;
} while (1);
// post-conditions
NS_ASSERTION(parentFrame, "no normal ancestor found for special frame in GetIBContainingBlockFor");
NS_ASSERTION(parentFrame != aFrame, "parentFrame is actually the child frame - bogus reslt");
return parentFrame;
}
//----------------------------------------------------------------------
// XXX this predicate and its cousins need to migrated to a single
// place in layout - something in nsStyleDisplay maybe?
static PRBool
IsInlineFrame(nsIFrame* aFrame)
{
// XXXwaterson why don't we use |! display->IsBlockLevel()| here?
switch (aFrame->GetStyleDisplay()->mDisplay) {
case NS_STYLE_DISPLAY_INLINE:
case NS_STYLE_DISPLAY_INLINE_BLOCK:
case NS_STYLE_DISPLAY_INLINE_TABLE:
case NS_STYLE_DISPLAY_INLINE_BOX:
case NS_STYLE_DISPLAY_INLINE_GRID:
case NS_STYLE_DISPLAY_INLINE_STACK:
case NS_STYLE_DISPLAY_DECK:
case NS_STYLE_DISPLAY_POPUP:
case NS_STYLE_DISPLAY_GROUPBOX:
return PR_TRUE;
default:
break;
}
return PR_FALSE;
}
// NeedSpecialFrameReframe uses this until we decide what to do about IsInlineFrame() above
static PRBool
IsInlineFrame2(nsIFrame* aFrame)
{
return !aFrame->GetStyleDisplay()->IsBlockLevel();
}
//----------------------------------------------------------------------
// Block/inline frame construction logic. We maintain a few invariants here:
//
// 1. Block frames contain block and inline frames.
//
// 2. Inline frames only contain inline frames. If an inline parent has a block
// child then the block child is migrated upward until it lands in a block
// parent (the inline frames containing block is where it will end up).
// XXX consolidate these things
static PRBool
IsBlockFrame(nsIFrame* aFrame)
{
// XXXwaterson this seems wrong; see IsInlineFrame() immediately
// above, which will treat inline-block (e.g.) as an inline. Why
// don't we use display->IsBlockLevel() here?
const nsStyleDisplay* display = aFrame->GetStyleDisplay();
return NS_STYLE_DISPLAY_INLINE != display->mDisplay;
}
static nsIFrame*
FindFirstBlock(nsIFrame* aKid, nsIFrame** aPrevKid)
{
nsIFrame* prevKid = nsnull;
while (aKid) {
if (IsBlockFrame(aKid)) {
*aPrevKid = prevKid;
return aKid;
}
prevKid = aKid;
aKid = aKid->GetNextSibling();
}
*aPrevKid = nsnull;
return nsnull;
}
static nsIFrame*
FindLastBlock(nsIFrame* aKid)
{
nsIFrame* lastBlock = nsnull;
while (aKid) {
if (IsBlockFrame(aKid)) {
lastBlock = aKid;
}
aKid = aKid->GetNextSibling();
}
return lastBlock;
}
/*
* Unlike the special (next) sibling, the special previous sibling
* property points only from the anonymous block to the original
* inline that preceded it. DO NOT CHANGE THAT -- the
* GetParentStyleContextFrame code depends on it! It is useful for
* finding the "special parent" of a frame (i.e., a frame from which a
* good parent style context can be obtained), one looks at the
* special previous sibling annotation of the real parent of the frame
* (if the real parent has NS_FRAME_IS_SPECIAL).
*/
inline void
MarkIBSpecialPrevSibling(nsPresContext* aPresContext,
nsIFrame *aAnonymousFrame,
nsIFrame *aSpecialParent)
{
aPresContext->PropertyTable()->SetProperty(aAnonymousFrame,
nsLayoutAtoms::IBSplitSpecialPrevSibling,
aSpecialParent, nsnull, nsnull);
}
// -----------------------------------------------------------
// Helper function that recursively removes content to frame mappings and
// undisplayed content mappings.
// This differs from DeletingFrameSubtree() because the frames have not yet been
// added to the frame hierarchy
static void
DoCleanupFrameReferences(nsPresContext* aPresContext,
nsFrameManager* aFrameManager,
nsIFrame* aFrameIn)
{
nsIContent* content = aFrameIn->GetContent();
nsIFrame* frame = aFrameIn;
// if the frame is a placeholder use the out of flow frame
if (nsLayoutAtoms::placeholderFrame == aFrameIn->GetType()) {
frame = ((nsPlaceholderFrame*)frame)->GetOutOfFlowFrame();
NS_ASSERTION(frame, "program error - null of of flow frame in placeholder");
}
// Remove the mapping from the content object to its frame
aFrameManager->SetPrimaryFrameFor(content, nsnull);
frame->RemovedAsPrimaryFrame(aPresContext);
aFrameManager->ClearAllUndisplayedContentIn(content);
// Recursively walk the child frames.
// Note: we only need to look at the principal child list
nsIFrame* childFrame = frame->GetFirstChild(nsnull);
while (childFrame) {
DoCleanupFrameReferences(aPresContext, aFrameManager, childFrame);
// Get the next sibling child frame
childFrame = childFrame->GetNextSibling();
}
}
// Helper function that walks a frame list and calls DoCleanupFrameReference()
static void
CleanupFrameReferences(nsPresContext* aPresContext,
nsFrameManager* aFrameManager,
nsIFrame* aFrameList)
{
while (aFrameList) {
DoCleanupFrameReferences(aPresContext, aFrameManager, aFrameList);
// Get the sibling frame
aFrameList = aFrameList->GetNextSibling();
}
}
// -----------------------------------------------------------
// Structure used when constructing formatting object trees.
struct nsFrameItems {
nsIFrame* childList;
nsIFrame* lastChild;
nsFrameItems(nsIFrame* aFrame = nsnull);
// Appends the frame to the end of the list
void AddChild(nsIFrame* aChild);
};
nsFrameItems::nsFrameItems(nsIFrame* aFrame)
: childList(aFrame), lastChild(aFrame)
{
}
void
nsFrameItems::AddChild(nsIFrame* aChild)
{
#ifdef DEBUG
nsIFrame* oldLastChild = lastChild;
#endif
if (childList == nsnull) {
childList = lastChild = aChild;
}
else
{
NS_ASSERTION(aChild != lastChild,
"Same frame being added to frame list twice?");
lastChild->SetNextSibling(aChild);
lastChild = aChild;
}
// if aChild has siblings, lastChild needs to be the last one
for (nsIFrame* sib = lastChild->GetNextSibling(); sib;
sib = sib->GetNextSibling()) {
NS_ASSERTION(oldLastChild != sib, "Loop in frame list");
lastChild = sib;
}
}
// -----------------------------------------------------------
// Structure used when constructing formatting object trees. Contains
// state information needed for absolutely positioned elements
struct nsAbsoluteItems : nsFrameItems {
// containing block for absolutely positioned elements
nsIFrame* containingBlock;
nsAbsoluteItems(nsIFrame* aContainingBlock);
#ifdef DEBUG
// XXXbz Does this need a debug-only assignment operator that nulls out the
// childList in the nsAbsoluteItems we're copying? Introducing a difference
// between debug and non-debug behavior seems bad, so I guess not...
~nsAbsoluteItems() {
NS_ASSERTION(!childList,
"Dangling child list. Someone forgot to insert it?");
}
#endif
// Appends the frame to the end of the list
void AddChild(nsIFrame* aChild);
};
nsAbsoluteItems::nsAbsoluteItems(nsIFrame* aContainingBlock)
: containingBlock(aContainingBlock)
{
}
// Additional behavior is that it sets the frame's NS_FRAME_OUT_OF_FLOW flag
void
nsAbsoluteItems::AddChild(nsIFrame* aChild)
{
aChild->AddStateBits(NS_FRAME_OUT_OF_FLOW);
nsFrameItems::AddChild(aChild);
}
// Structures used to record the creation of pseudo table frames where
// the content belongs to some ancestor.
// PseudoFrames are necessary when the childframe cannot be the direct
// ancestor of the content based parent frame. The amount of necessary pseudo
// frames is limited as the worst case would be table frame nested directly
// into another table frame. So the member structures of nsPseudoFrames can be
// viewed as a ring buffer where you start with the necessary frame type and
// add higher frames as long as necessary to fit into the initial parent frame.
// mLowestType is some sort of stack pointer which shows the start of the
// ringbuffer. The insertion of pseudo frames can happen between every
// two frames so we need to push and pop the pseudo frame data when children
// of a frame are created.
// The colgroup frame is special as it can harbour only col children.
// Once all children of given frame are known, the pseudo frames can be
// processed that means attached to the corresponding parent frames.
// The behaviour is in general described at
// http://www.w3.org/TR/CSS21/tables.html#anonymous-boxes
// however there are implementation details that extend the CSS 2.1
// specification:
// 1. every table frame is wrapped in an outer table frame, which is always a
// pseudo frame.
// 2. the outer table frame will be also created to hold a caption.
// 3. each table cell will have a pseudo inner table cell frame.
// 4. a colgroup frame is created between a column and a table
// 5. a rowgroup frame is created between a row and a table
// A table frame can only have rowgroups or column groups as children.
// A outer table frame can only have one caption and one table frame
// as children.
// Every table even if all table frames are specified will require the
// creation of two types of pseudo frames: the outer table frame and the inner
// table cell frames.
struct nsPseudoFrameData {
nsIFrame* mFrame; // created pseudo frame
nsFrameItems mChildList; // child frames pending to be added to the pseudo
nsFrameItems mChildList2; // child frames pending to be added to the pseudo
nsPseudoFrameData();
nsPseudoFrameData(nsPseudoFrameData& aOther);
void Reset();
};
struct nsPseudoFrames {
nsPseudoFrameData mTableOuter;
nsPseudoFrameData mTableInner;
nsPseudoFrameData mRowGroup;
nsPseudoFrameData mColGroup;
nsPseudoFrameData mRow;
nsPseudoFrameData mCellOuter;
nsPseudoFrameData mCellInner;
// the frame type of the most descendant pseudo frame, no AddRef
nsIAtom* mLowestType;
nsPseudoFrames();
nsPseudoFrames& operator=(const nsPseudoFrames& aOther);
void Reset(nsPseudoFrames* aSave = nsnull);
PRBool IsEmpty() { return (!mLowestType && !mColGroup.mFrame); }
};
nsPseudoFrameData::nsPseudoFrameData()
: mFrame(nsnull), mChildList(), mChildList2()
{}
nsPseudoFrameData::nsPseudoFrameData(nsPseudoFrameData& aOther)
: mFrame(aOther.mFrame), mChildList(aOther.mChildList),
mChildList2(aOther.mChildList2)
{}
void
nsPseudoFrameData::Reset()
{
mFrame = nsnull;
mChildList.childList = mChildList.lastChild = nsnull;
mChildList2.childList = mChildList2.lastChild = nsnull;
}
nsPseudoFrames::nsPseudoFrames()
: mTableOuter(), mTableInner(), mRowGroup(), mColGroup(),
mRow(), mCellOuter(), mCellInner(), mLowestType(nsnull)
{}
nsPseudoFrames& nsPseudoFrames::operator=(const nsPseudoFrames& aOther)
{
mTableOuter = aOther.mTableOuter;
mTableInner = aOther.mTableInner;
mColGroup = aOther.mColGroup;
mRowGroup = aOther.mRowGroup;
mRow = aOther.mRow;
mCellOuter = aOther.mCellOuter;
mCellInner = aOther.mCellInner;
mLowestType = aOther.mLowestType;
return *this;
}
void
nsPseudoFrames::Reset(nsPseudoFrames* aSave)
{
if (aSave) {
*aSave = *this;
}
mTableOuter.Reset();
mTableInner.Reset();
mColGroup.Reset();
mRowGroup.Reset();
mRow.Reset();
mCellOuter.Reset();
mCellInner.Reset();
mLowestType = nsnull;
}
// -----------------------------------------------------------
// Structure for saving the existing state when pushing/poping containing
// blocks. The destructor restores the state to its previous state
class nsFrameConstructorSaveState {
public:
nsFrameConstructorSaveState();
~nsFrameConstructorSaveState();
private:
nsAbsoluteItems* mItems; // pointer to struct whose data we save/restore
PRBool* mFirstLetterStyle;
PRBool* mFirstLineStyle;
nsAbsoluteItems mSavedItems; // copy of original data
PRBool mSavedFirstLetterStyle;
PRBool mSavedFirstLineStyle;
// The name of the child list in which our frames would belong
nsIAtom* mChildListName;
nsFrameConstructorState* mState;
friend class nsFrameConstructorState;
};
// Structure for saving the existing state when pushing/popping insertion
// points for nsIAnonymousContentCreator. The destructor restores the state
// to its previous state. See documentation of these members in
// nsFrameConstructorState.
class nsFrameConstructorInsertionState {
public:
nsFrameConstructorInsertionState();
~nsFrameConstructorInsertionState();
private:
nsIFrame* mAnonymousCreator;
nsIContent* mInsertionContent;
PRBool mCreatorIsBlock;
nsFrameConstructorState* mState;
friend class nsFrameConstructorState;
};
// Structure used for maintaining state information during the
// frame construction process
class nsFrameConstructorState {
public:
nsPresContext *mPresContext;
nsIPresShell *mPresShell;
nsFrameManager *mFrameManager;
// Containing block information for out-of-flow frammes
nsAbsoluteItems mFixedItems;
nsAbsoluteItems mAbsoluteItems;
nsAbsoluteItems mFloatedItems;
PRBool mFirstLetterStyle;
PRBool mFirstLineStyle;
nsCOMPtr<nsILayoutHistoryState> mFrameState;
nsPseudoFrames mPseudoFrames;
// The nsIAnonymousContentCreator we're currently constructing children for.
nsIFrame *mAnonymousCreator;
// The insertion point node for mAnonymousCreator.
nsIContent *mInsertionContent;
// Whether the parent is a block (see ProcessChildren's aParentIsBlock)
PRBool mCreatorIsBlock;
// Constructor
// Use the passed-in history state.
nsFrameConstructorState(nsIPresShell* aPresShell,
nsIFrame* aFixedContainingBlock,
nsIFrame* aAbsoluteContainingBlock,
nsIFrame* aFloatContainingBlock,
nsILayoutHistoryState* aHistoryState);
// Get the history state from the pres context's pres shell.
nsFrameConstructorState(nsIPresShell* aPresShell,
nsIFrame* aFixedContainingBlock,
nsIFrame* aAbsoluteContainingBlock,
nsIFrame* aFloatContainingBlock);
~nsFrameConstructorState();
// Function to push the existing absolute containing block state and
// create a new scope.
void PushAbsoluteContainingBlock(nsIFrame* aNewAbsoluteContainingBlock,
nsFrameConstructorSaveState& aSaveState);
// Function to push the existing float containing block state and
// create a new scope
void PushFloatContainingBlock(nsIFrame* aNewFloatContainingBlock,
nsFrameConstructorSaveState& aSaveState,
PRBool aFirstLetterStyle,
PRBool aFirstLineStyle);
// Function to return the proper geometric parent for a frame with display
// struct given by aStyleDisplay and parent's frame given by
// aContentParentFrame. If the frame is not allowed to be positioned, pass
// false for aCanBePositioned.
nsIFrame* GetGeometricParent(const nsStyleDisplay* aStyleDisplay,
nsIFrame* aContentParentFrame);
/**
* Function to add a new frame to the right frame list. This MUST be called
* on frames before their children have been processed if the frames might
* conceivably be out-of-flow; otherwise cleanup in error cases won't work
* right. Also, this MUST be called on frames after they have been
* initialized.
* @param aNewFrame the frame to add
* @param aFrameItems the list to add in-flow frames to
* @param aStyleDisplay the display struct for aNewFrame
* @param aContent the content pointer for aNewFrame
* @param aStyleContext the style context of aNewFrame
* @param aParentFrame the parent frame for the content if it were in-flow
* @param aCanBePositioned pass false if the frame isn't allowed to be
* positioned
* @param aCanBeFloated pass false if the frame isn't allowed to be
* floated
* @throws NS_ERROR_OUT_OF_MEMORY if it happens.
* @note If this method throws, that means that aNewFrame was not inserted
* into any frame lists. Furthermore, this method will handle cleanup
* of aNewFrame (via calling CleanupFrameReferences() and Destroy() on
* it).
*/
nsresult AddChild(nsIFrame* aNewFrame,
nsFrameItems& aFrameItems,
const nsStyleDisplay* aStyleDisplay,
nsIContent* aContent,
nsStyleContext* aStyleContext,
nsIFrame* aParentFrame,
PRBool aCanBePositioned = PR_TRUE,
PRBool aCanBeFloated = PR_TRUE);
// Push an nsIAnonymousContentCreator and its insertion node
void PushAnonymousContentCreator(nsIFrame *aCreator,
nsIContent *aContent,
PRBool aIsBlock,
nsFrameConstructorInsertionState &aSaveState);
protected:
friend class nsFrameConstructorSaveState;
friend class nsFrameConstructorInsertionState;
/**
* ProcessFrameInsertions takes the frames in aFrameItems and adds them as
* kids to the aChildListName child list of |aFrameItems.containingBlock|.
*/
void ProcessFrameInsertions(nsAbsoluteItems& aFrameItems,
nsIAtom* aChildListName);
};
nsFrameConstructorState::nsFrameConstructorState(nsIPresShell* aPresShell,
nsIFrame* aFixedContainingBlock,
nsIFrame* aAbsoluteContainingBlock,
nsIFrame* aFloatContainingBlock,
nsILayoutHistoryState* aHistoryState)
: mPresContext(aPresShell->GetPresContext()),
mPresShell(aPresShell),
mFrameManager(aPresShell->FrameManager()),
mFixedItems(aFixedContainingBlock),
mAbsoluteItems(aAbsoluteContainingBlock),
mFloatedItems(aFloatContainingBlock),
mFirstLetterStyle(PR_FALSE),
mFirstLineStyle(PR_FALSE),
mFrameState(aHistoryState),
mPseudoFrames(),
mAnonymousCreator(nsnull),
mInsertionContent(nsnull),
mCreatorIsBlock(PR_FALSE)
{
}
nsFrameConstructorState::nsFrameConstructorState(nsIPresShell* aPresShell,
nsIFrame* aFixedContainingBlock,
nsIFrame* aAbsoluteContainingBlock,
nsIFrame* aFloatContainingBlock)
: mPresContext(aPresShell->GetPresContext()),
mPresShell(aPresShell),
mFrameManager(aPresShell->FrameManager()),
mFixedItems(aFixedContainingBlock),
mAbsoluteItems(aAbsoluteContainingBlock),
mFloatedItems(aFloatContainingBlock),
mFirstLetterStyle(PR_FALSE),
mFirstLineStyle(PR_FALSE),
mPseudoFrames(),
mAnonymousCreator(nsnull),
mInsertionContent(nsnull),
mCreatorIsBlock(PR_FALSE)
{
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(container);
if (docShell)
docShell->GetLayoutHistoryState(getter_AddRefs(mFrameState));
}
nsFrameConstructorState::~nsFrameConstructorState()
{
ProcessFrameInsertions(mAbsoluteItems, nsLayoutAtoms::absoluteList);
ProcessFrameInsertions(mFixedItems, nsLayoutAtoms::fixedList);
ProcessFrameInsertions(mFloatedItems, nsLayoutAtoms::floatList);
}
// Use the first-in-flow of a positioned inline frame in galley mode as the
// containing block. We don't need to do this for a block, since blocks aren't
// continued in galley mode.
static nsIFrame*
AdjustAbsoluteContainingBlock(nsPresContext* aPresContext,
nsIFrame* aContainingBlockIn)
{
nsIFrame* containingBlock = aContainingBlockIn;
if (!aPresContext->IsPaginated()) {
if (nsLayoutAtoms::positionedInlineFrame == containingBlock->GetType()) {
containingBlock = ((nsPositionedInlineFrame*)containingBlock)->GetFirstInFlow();
}
}
return containingBlock;
}
void
nsFrameConstructorState::PushAbsoluteContainingBlock(nsIFrame* aNewAbsoluteContainingBlock,
nsFrameConstructorSaveState& aSaveState)
{
aSaveState.mItems = &mAbsoluteItems;
aSaveState.mSavedItems = mAbsoluteItems;
aSaveState.mChildListName = nsLayoutAtoms::absoluteList;
aSaveState.mState = this;
mAbsoluteItems =
nsAbsoluteItems(AdjustAbsoluteContainingBlock(mPresContext,
aNewAbsoluteContainingBlock));
}
void
nsFrameConstructorState::PushFloatContainingBlock(nsIFrame* aNewFloatContainingBlock,
nsFrameConstructorSaveState& aSaveState,
PRBool aFirstLetterStyle,
PRBool aFirstLineStyle)
{
aSaveState.mItems = &mFloatedItems;
aSaveState.mFirstLetterStyle = &mFirstLetterStyle;
aSaveState.mFirstLineStyle = &mFirstLineStyle;
aSaveState.mSavedItems = mFloatedItems;
aSaveState.mSavedFirstLetterStyle = mFirstLetterStyle;
aSaveState.mSavedFirstLineStyle = mFirstLineStyle;
aSaveState.mChildListName = nsLayoutAtoms::floatList;
aSaveState.mState = this;
mFloatedItems = nsAbsoluteItems(aNewFloatContainingBlock);
mFirstLetterStyle = aFirstLetterStyle;
mFirstLineStyle = aFirstLineStyle;
}
nsIFrame*
nsFrameConstructorState::GetGeometricParent(const nsStyleDisplay* aStyleDisplay,
nsIFrame* aContentParentFrame)
{
NS_PRECONDITION(aStyleDisplay, "Must have display struct!");
// If there is no container for a fixed, absolute, or floating root
// frame, we will ignore the positioning. This hack is originally
// brought to you by the letter T: tables, since other roots don't
// even call into this code. See bug 178855.
//
// XXX Disabling positioning in this case is a hack. If one was so inclined,
// one could support this either by (1) inserting a dummy block between the
// table and the canvas or (2) teaching the canvas how to reflow positioned
// elements. (1) has the usual problems when multiple frames share the same
// content (notice all the special cases in this file dealing with inner
// tables and outer tables which share the same content). (2) requires some
// work and possible factoring.
//
// XXXbz couldn't we just force position to "static" on roots and
// float to "none"? That's OK per CSS 2.1, as far as I can tell.
if (aStyleDisplay->IsFloating() && mFloatedItems.containingBlock) {
NS_ASSERTION(!aStyleDisplay->IsAbsolutelyPositioned(),
"Absolutely positioned _and_ floating?");
return mFloatedItems.containingBlock;
}
if (aStyleDisplay->mPosition == NS_STYLE_POSITION_ABSOLUTE &&
mAbsoluteItems.containingBlock) {
return mAbsoluteItems.containingBlock;
}
if (aStyleDisplay->mPosition == NS_STYLE_POSITION_FIXED &&
mFixedItems.containingBlock) {
return mFixedItems.containingBlock;
}
return aContentParentFrame;
}
nsresult
nsFrameConstructorState::AddChild(nsIFrame* aNewFrame,
nsFrameItems& aFrameItems,
const nsStyleDisplay* aStyleDisplay,
nsIContent* aContent,
nsStyleContext* aStyleContext,
nsIFrame* aParentFrame,
PRBool aCanBePositioned,
PRBool aCanBeFloated)
{
// The comments in GetGeometricParent regarding root table frames
// all apply here, unfortunately.
PRBool needPlaceholder = PR_FALSE;
nsFrameItems* frameItems = &aFrameItems;
if (aCanBeFloated && aStyleDisplay->IsFloating() &&
mFloatedItems.containingBlock) {
NS_ASSERTION(aNewFrame->GetParent() == mFloatedItems.containingBlock,
"Float whose parent is not the float containing block?");
needPlaceholder = PR_TRUE;
frameItems = &mFloatedItems;
} else if (aCanBePositioned) {
if (aStyleDisplay->mPosition == NS_STYLE_POSITION_ABSOLUTE &&
mAbsoluteItems.containingBlock) {
NS_ASSERTION(aNewFrame->GetParent() == mAbsoluteItems.containingBlock,
"Abs pos whose parent is not the abs pos containing block?");
needPlaceholder = PR_TRUE;
frameItems = &mAbsoluteItems;
}
if (aStyleDisplay->mPosition == NS_STYLE_POSITION_FIXED &&
mFixedItems.containingBlock) {
NS_ASSERTION(aNewFrame->GetParent() == mFixedItems.containingBlock,
"Fixed pos whose parent is not the fixed pos containing block?");
needPlaceholder = PR_TRUE;
frameItems = &mFixedItems;
}
}
if (needPlaceholder) {
NS_ASSERTION(frameItems != &aFrameItems,
"Putting frame in-flow _and_ want a placeholder?");
nsIFrame* placeholderFrame;
nsresult rv =
nsCSSFrameConstructor::CreatePlaceholderFrameFor(mPresShell,
mPresContext,
mFrameManager,
aContent,
aNewFrame,
aStyleContext,
aParentFrame,
&placeholderFrame);
if (NS_FAILED(rv)) {
// Note that aNewFrame could be the top frame for a scrollframe setup,
// hence already set as the primary frame. So we have to clean up here.
// But it shouldn't have any out-of-flow kids.
// XXXbz Maybe add a utility function to assert that?
CleanupFrameReferences(mPresContext, mFrameManager,
aNewFrame);
aNewFrame->Destroy(mPresContext);
return rv;
}
// Add the placeholder frame to the flow
aFrameItems.AddChild(placeholderFrame);
}
#ifdef DEBUG
else {
NS_ASSERTION(aNewFrame->GetParent() == aParentFrame,
"In-flow frame has wrong parent");
}
#endif
frameItems->AddChild(aNewFrame);
// Now add the special siblings too.
nsIFrame* specialSibling = aNewFrame;
while (specialSibling && IsFrameSpecial(specialSibling)) {
GetSpecialSibling(mFrameManager, specialSibling, &specialSibling);
if (specialSibling) {
NS_ASSERTION(frameItems == &aFrameItems,
"IB split ending up in an out-of-flow childlist?");
frameItems->AddChild(specialSibling);
}
}
return NS_OK;
}
void
nsFrameConstructorState::PushAnonymousContentCreator(nsIFrame *aCreator,
nsIContent *aContent,
PRBool aIsBlock,
nsFrameConstructorInsertionState &aSaveState)
{
NS_ASSERTION(aCreator || !aContent, "Must have a frame if there is an insertion node");
aSaveState.mAnonymousCreator = mAnonymousCreator;
aSaveState.mInsertionContent = mInsertionContent;
aSaveState.mCreatorIsBlock = mCreatorIsBlock;
aSaveState.mState = this;
mAnonymousCreator = aCreator;
mInsertionContent = aContent;
mCreatorIsBlock = aIsBlock;
}
void
nsFrameConstructorState::ProcessFrameInsertions(nsAbsoluteItems& aFrameItems,
nsIAtom* aChildListName)
{
NS_PRECONDITION((&aFrameItems == &mFloatedItems &&
aChildListName == nsLayoutAtoms::floatList) ||
(&aFrameItems == &mAbsoluteItems &&
aChildListName == nsLayoutAtoms::absoluteList) ||
(&aFrameItems == &mFixedItems &&
aChildListName == nsLayoutAtoms::fixedList),
"Unexpected aFrameItems/aChildListName combination");
nsIFrame* firstNewFrame = aFrameItems.childList;
if (!firstNewFrame) {
return;
}
nsIFrame* containingBlock = aFrameItems.containingBlock;
NS_ASSERTION(containingBlock,
"Child list without containing block?");
// Insert the frames hanging out in aItems. We can use SetInitialChildList()
// if the containing block hasn't been reflown yet (so NS_FRAME_FIRST_REFLOW
// is set) and doesn't have any frames in the aChildListName child list yet.
nsIFrame* firstChild = containingBlock->GetFirstChild(aChildListName);
nsresult rv = NS_OK;
if (!firstChild && (containingBlock->GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
rv = containingBlock->SetInitialChildList(mPresContext,
aChildListName,
firstNewFrame);
} else {
// Note that whether the frame construction context is doing an append or
// not is not helpful here, since it could be appending to some frame in
// the middle of the document, which means we're not necessarily
// appending to the children of the containing block.
//
// We need to make sure the 'append to the end of document' case is fast.
// So first test the last child of the containing block
nsIFrame* lastChild = nsLayoutUtils::GetLastSibling(firstChild);
if (!lastChild ||
nsLayoutUtils::CompareTreePosition(lastChild->GetContent(),
firstNewFrame->GetContent(),
containingBlock->GetContent()) < 0) {
// no lastChild, or lastChild comes before the new children, so just append
rv = containingBlock->AppendFrames(aChildListName, firstNewFrame);
} else {
nsIFrame* insertionPoint = nsnull;
// try the other children
for (nsIFrame* f = firstChild; f != lastChild; f = f->GetNextSibling()) {
if (nsLayoutUtils::CompareTreePosition(f->GetContent(),
firstNewFrame->GetContent(),
containingBlock->GetContent()) > 0) {
// f comes after the new children, so stop here and insert after
// the previous frame
break;
}
insertionPoint = f;
}
rv = containingBlock->InsertFrames(aChildListName, insertionPoint,
firstNewFrame);
}
}
aFrameItems.childList = nsnull;
// XXXbz And if NS_FAILED(rv), what? I guess we need to clean up the list
// and deal with all the placeholders... but what if the placeholders aren't
// in the document yet? Could that happen?
NS_ASSERTION(NS_SUCCEEDED(rv), "Frames getting lost!");
}
nsFrameConstructorSaveState::nsFrameConstructorSaveState()
: mItems(nsnull),
mFirstLetterStyle(nsnull),
mFirstLineStyle(nsnull),
mSavedItems(nsnull),
mSavedFirstLetterStyle(PR_FALSE),
mSavedFirstLineStyle(PR_FALSE),
mChildListName(nsnull),
mState(nsnull)
{
}
nsFrameConstructorSaveState::~nsFrameConstructorSaveState()
{
// Restore the state
if (mItems) {
NS_ASSERTION(mState, "Can't have mItems set without having a state!");
mState->ProcessFrameInsertions(*mItems, mChildListName);
*mItems = mSavedItems;
#ifdef DEBUG
// We've transferred the child list, so drop the pointer we held to it.
// Note that this only matters for the assert in ~nsAbsoluteItems.
mSavedItems.childList = nsnull;
#endif
}
if (mFirstLetterStyle) {
*mFirstLetterStyle = mSavedFirstLetterStyle;
}
if (mFirstLineStyle) {
*mFirstLineStyle = mSavedFirstLineStyle;
}
}
nsFrameConstructorInsertionState::nsFrameConstructorInsertionState()
: mAnonymousCreator(nsnull),
mInsertionContent(nsnull),
mCreatorIsBlock(PR_FALSE),
mState(nsnull)
{
}
nsFrameConstructorInsertionState::~nsFrameConstructorInsertionState()
{
// Restore the state
if (mState) {
mState->mAnonymousCreator = mAnonymousCreator;
mState->mInsertionContent = mInsertionContent;
mState->mCreatorIsBlock = mCreatorIsBlock;
}
}
// Putting this up here to help inlining work on compilers that won't inline
// definitions that are after the call site.
inline nsresult
nsCSSFrameConstructor::CreateInsertionPointChildren(nsFrameConstructorState &aState,
nsIFrame *aNewFrame,
nsIContent *aContent,
PRBool aUseInsertionFrame)
{
if (aState.mInsertionContent == aContent)
return CreateInsertionPointChildren(aState, aNewFrame, aUseInsertionFrame);
return NS_OK;
}
static
PRBool IsBorderCollapse(nsIFrame* aFrame)
{
for (nsIFrame* frame = aFrame; frame; frame = frame->GetParent()) {
if (nsLayoutAtoms::tableFrame == frame->GetType()) {
return ((nsTableFrame*)frame)->IsBorderCollapse();
}
}
NS_ASSERTION(PR_FALSE, "program error");
return PR_FALSE;
}
// a helper routine that automatically navigates placeholders.
static nsIFrame*
GetRealFrame(nsIFrame* aFrame)
{
nsIFrame* result = aFrame;
// We may be a placeholder. If we are, go to the real frame.
// See if it's a placeholder frame for a float.
PRBool isPlaceholder = (nsLayoutAtoms::placeholderFrame == aFrame->GetType());
if (isPlaceholder) {
// Get the out-of-flow frame that the placeholder points to.
// This is the real float that we should examine.
result = NS_STATIC_CAST(nsPlaceholderFrame*,aFrame)->GetOutOfFlowFrame();
NS_ASSERTION(result, "No out of flow frame found for placeholder!\n");
}
return result;
}
/**
* Utility method, called from MoveChildrenTo(), that recursively
* descends down the frame hierarchy looking for floating frames that
* need parent pointer adjustments to account for the containment block
* changes that could occur as the result of the reparenting done in
* MoveChildrenTo().
*/
static void
AdjustFloatParentPtrs(nsIFrame* aFrame,
nsFrameConstructorState& aState)
{
nsIFrame *outOfFlowFrame = GetRealFrame(aFrame);
if (outOfFlowFrame && outOfFlowFrame != aFrame) {
// Get the display data for the outOfFlowFrame so we can
// figure out if it is a float.
if (outOfFlowFrame->GetStyleDisplay()->IsFloating()) {
// Update the parent pointer for outOfFlowFrame if it's
// containing block has changed as the result of reparenting,
nsIFrame *parent = aState.mFloatedItems.containingBlock;
outOfFlowFrame->SetParent(parent);
if (outOfFlowFrame->GetStateBits() &
(NS_FRAME_HAS_VIEW | NS_FRAME_HAS_CHILD_WITH_VIEW)) {
// We don't need to walk up the tree, since each level of
// recursion of the SplitToContainingBlock will propagate the
// bit.
parent->AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW);
}
}
// All out-of-flows are automatically float containing blocks, so we're
// done here
return;
}
// XXXbz we really want IsFloatContainingBlock() here!
if (IsBlockFrame(aFrame)) {
// No need to recurse further; floats whose placeholders are
// inside a block already have the right parent.
return;
}
// Dive down into children to see if any of their
// placeholders need adjusting.
nsIFrame *childFrame = aFrame->GetFirstChild(nsnull);
while (childFrame)
{
// XXX_kin: Do we need to prevent descent into anonymous content here?
AdjustFloatParentPtrs(childFrame, aState);
childFrame = childFrame->GetNextSibling();
}
}
/**
* Moves frames to a new parent, updating the style context and
* propagating relevant frame state bits. |aNewParentSC| may be null,
* in which case the child frames' style contexts will remain
* untouched. |aState| may be null, in which case the parent
* pointers of out-of-flow frames will remain untouched.
*/
static void
MoveChildrenTo(nsFrameManager* aFrameManager,
nsStyleContext* aNewParentSC,
nsIFrame* aNewParent,
nsIFrame* aFrameList,
nsFrameConstructorState* aState)
{
PRBool setHasChildWithView = PR_FALSE;
while (aFrameList) {
if (!setHasChildWithView
&& (aFrameList->GetStateBits() & (NS_FRAME_HAS_VIEW | NS_FRAME_HAS_CHILD_WITH_VIEW))) {
setHasChildWithView = PR_TRUE;
}
aFrameList->SetParent(aNewParent);
// If aState is not null, the caller expects us to make adjustments so that
// floats whose placeholders are descendants of frames in aFrameList point
// to the correct parent.
if (aState)
AdjustFloatParentPtrs(aFrameList, *aState);
#if 0
// XXX When this is used with {ib} frame hierarchies, it seems
// fine to leave the style contexts of the children of the
// anonymous block frame parented by the original inline
// frame. (In fact, one would expect some inheritance
// relationships to be broken if we reparented them to the
// anonymous block frame, but oddly they aren't -- need to
// investigate that...)
if (aNewParentSC)
aPresContext->FrameManager()->ReParentStyleContext(aFrameList,
aNewParentSC);
#endif
aFrameList = aFrameList->GetNextSibling();
}
if (setHasChildWithView) {
aNewParent->AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW);
}
}
// -----------------------------------------------------------
// Structure used when creating table frames.
struct nsTableCreator {
virtual nsresult CreateTableOuterFrame(nsIFrame** aNewFrame);
virtual nsresult CreateTableFrame(nsIFrame** aNewFrame);
virtual nsresult CreateTableCaptionFrame(nsIFrame** aNewFrame);
virtual nsresult CreateTableRowGroupFrame(nsIFrame** aNewFrame);
virtual nsresult CreateTableColFrame(nsIFrame** aNewFrame);
virtual nsresult CreateTableColGroupFrame(nsIFrame** aNewFrame);
virtual nsresult CreateTableRowFrame(nsIFrame** aNewFrame);
virtual nsresult CreateTableCellFrame(nsIFrame* aParentFrame, nsIFrame** aNewFrame);
virtual nsresult CreateTableCellInnerFrame(nsIFrame** aNewFrame);
nsTableCreator(nsIPresShell* aPresShell)
{
mPresShell = aPresShell;
}
virtual ~nsTableCreator() {};
nsIPresShell* mPresShell;
};
nsresult
nsTableCreator::CreateTableOuterFrame(nsIFrame** aNewFrame) {
return NS_NewTableOuterFrame(mPresShell, aNewFrame);
}
nsresult
nsTableCreator::CreateTableFrame(nsIFrame** aNewFrame) {
return NS_NewTableFrame(mPresShell, aNewFrame);
}
nsresult
nsTableCreator::CreateTableCaptionFrame(nsIFrame** aNewFrame) {
return NS_NewTableCaptionFrame(mPresShell, aNewFrame);
}
nsresult
nsTableCreator::CreateTableRowGroupFrame(nsIFrame** aNewFrame) {
return NS_NewTableRowGroupFrame(mPresShell, aNewFrame);
}
nsresult
nsTableCreator::CreateTableColFrame(nsIFrame** aNewFrame) {
return NS_NewTableColFrame(mPresShell, aNewFrame);
}
nsresult
nsTableCreator::CreateTableColGroupFrame(nsIFrame** aNewFrame) {
return NS_NewTableColGroupFrame(mPresShell, aNewFrame);
}
nsresult
nsTableCreator::CreateTableRowFrame(nsIFrame** aNewFrame) {
return NS_NewTableRowFrame(mPresShell, aNewFrame);
}
nsresult
nsTableCreator::CreateTableCellFrame(nsIFrame* aParentFrame,
nsIFrame** aNewFrame) {
return NS_NewTableCellFrame(mPresShell, IsBorderCollapse(aParentFrame), aNewFrame);
}
nsresult
nsTableCreator::CreateTableCellInnerFrame(nsIFrame** aNewFrame) {
return NS_NewTableCellInnerFrame(mPresShell, aNewFrame);
}
//MathML Mod - RBS
#ifdef MOZ_MATHML
// Structure used when creating MathML mtable frames
struct nsMathMLmtableCreator: public nsTableCreator {
virtual nsresult CreateTableOuterFrame(nsIFrame** aNewFrame);
virtual nsresult CreateTableFrame(nsIFrame** aNewFrame);
virtual nsresult CreateTableRowFrame(nsIFrame** aNewFrame);
virtual nsresult CreateTableCellFrame(nsIFrame* aParentFrame, nsIFrame** aNewFrame);
virtual nsresult CreateTableCellInnerFrame(nsIFrame** aNewFrame);
nsMathMLmtableCreator(nsIPresShell* aPresShell)
:nsTableCreator(aPresShell) {};
};
nsresult
nsMathMLmtableCreator::CreateTableOuterFrame(nsIFrame** aNewFrame)
{
return NS_NewMathMLmtableOuterFrame(mPresShell, aNewFrame);
}
nsresult
nsMathMLmtableCreator::CreateTableFrame(nsIFrame** aNewFrame)
{
return NS_NewMathMLmtableFrame(mPresShell, aNewFrame);
}
nsresult
nsMathMLmtableCreator::CreateTableRowFrame(nsIFrame** aNewFrame)
{
return NS_NewMathMLmtrFrame(mPresShell, aNewFrame);
}
nsresult
nsMathMLmtableCreator::CreateTableCellFrame(nsIFrame* aParentFrame,
nsIFrame** aNewFrame)
{
NS_ASSERTION(!IsBorderCollapse(aParentFrame), "not implemented");
return NS_NewMathMLmtdFrame(mPresShell, aNewFrame);
}
nsresult
nsMathMLmtableCreator::CreateTableCellInnerFrame(nsIFrame** aNewFrame)
{
// only works if aNewFrame can take care of the lineLayout logic
return NS_NewMathMLmtdInnerFrame(mPresShell, aNewFrame);
}
#endif // MOZ_MATHML
// Structure used to ensure that bindings are properly enqueued in the
// binding manager's attached queue.
struct nsAutoEnqueueBinding
{
nsAutoEnqueueBinding(nsIDocument* aDocument) :
mDocument(aDocument)
{}
~nsAutoEnqueueBinding();
nsRefPtr<nsXBLBinding> mBinding;
private:
nsIDocument* mDocument;
};
nsAutoEnqueueBinding::~nsAutoEnqueueBinding()
{
if (mBinding) {
mDocument->BindingManager()->AddToAttachedQueue(mBinding);
}
}
/**
* If the parent frame is a |tableFrame| and the child is a
* |captionFrame|, then we want to insert the frames beneath the
* |tableFrame|'s parent frame. Returns |PR_TRUE| if the parent frame
* needed to be fixed up.
*/
static PRBool
GetCaptionAdjustedParent(nsIFrame* aParentFrame,
const nsIFrame* aChildFrame,
nsIFrame** aAdjParentFrame)
{
*aAdjParentFrame = aParentFrame;
PRBool haveCaption = PR_FALSE;
if (nsLayoutAtoms::tableCaptionFrame == aChildFrame->GetType()) {
haveCaption = PR_TRUE;
if (nsLayoutAtoms::tableFrame == aParentFrame->GetType()) {
*aAdjParentFrame = aParentFrame->GetParent();
}
}
return haveCaption;
}
// Helper function that determines the child list name that aChildFrame
// is contained in
static void
GetChildListNameFor(nsIFrame* aParentFrame,
nsIFrame* aChildFrame,
nsIAtom** aListName)
{
nsIAtom* listName;
// See if the frame is moved out of the flow
if (aChildFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
// Look at the style information to tell
const nsStyleDisplay* disp = aChildFrame->GetStyleDisplay();
if (NS_STYLE_POSITION_ABSOLUTE == disp->mPosition) {
listName = nsLayoutAtoms::absoluteList;
} else if (NS_STYLE_POSITION_FIXED == disp->mPosition) {
listName = nsLayoutAtoms::fixedList;
} else {
NS_ASSERTION(aChildFrame->GetStyleDisplay()->IsFloating(),
"not a floated frame");
listName = nsLayoutAtoms::floatList;
}
} else {
listName = nsnull;
}
// Verify that the frame is actually in that child list
NS_ASSERTION(nsFrameList(aParentFrame->GetFirstChild(listName))
.ContainsFrame(aChildFrame), "not in child list");
NS_IF_ADDREF(listName);
*aListName = listName;
}
//----------------------------------------------------------------------
nsCSSFrameConstructor::nsCSSFrameConstructor(nsIDocument *aDocument,
nsIPresShell *aPresShell)
: mDocument(aDocument)
, mPresShell(aPresShell)
, mInitialContainingBlock(nsnull)
, mFixedContainingBlock(nsnull)
, mDocElementContainingBlock(nsnull)
, mGfxScrollFrame(nsnull)
, mUpdateCount(0)
, mQuotesDirty(PR_FALSE)
{
if (!gGotXBLFormPrefs) {
gGotXBLFormPrefs = PR_TRUE;
gUseXBLForms =
nsContentUtils::GetBoolPref("nglayout.debug.enable_xbl_forms");
}
// XXXbz this should be in Init() or something!
if (!mPendingRestyles.Init()) {
// now what?
}
// XXXbz this should be in Init() or something!
mEventQueueService = do_GetService(kEventQueueServiceCID);
#ifdef DEBUG
static PRBool gFirstTime = PR_TRUE;
if (gFirstTime) {
gFirstTime = PR_FALSE;
char* flags = PR_GetEnv("GECKO_FRAMECTOR_DEBUG_FLAGS");
if (flags) {
PRBool error = PR_FALSE;
for (;;) {
char* comma = PL_strchr(flags, ',');
if (comma)
*comma = '\0';
PRBool found = PR_FALSE;
FrameCtorDebugFlags* flag = gFlags;
FrameCtorDebugFlags* limit = gFlags + NUM_DEBUG_FLAGS;
while (flag < limit) {
if (PL_strcasecmp(flag->name, flags) == 0) {
*(flag->on) = PR_TRUE;
printf("nsCSSFrameConstructor: setting %s debug flag on\n", flag->name);
found = PR_TRUE;
break;
}
++flag;
}
if (! found)
error = PR_TRUE;
if (! comma)
break;
*comma = ',';
flags = comma + 1;
}
if (error) {
printf("Here are the available GECKO_FRAMECTOR_DEBUG_FLAGS:\n");
FrameCtorDebugFlags* flag = gFlags;
FrameCtorDebugFlags* limit = gFlags + NUM_DEBUG_FLAGS;
while (flag < limit) {
printf(" %s\n", flag->name);
++flag;
}
printf("Note: GECKO_FRAMECTOR_DEBUG_FLAGS is a comma separated list of flag\n");
printf("names (no whitespace)\n");
}
}
}
#endif
}
nsIXBLService * nsCSSFrameConstructor::GetXBLService()
{
if (!gXBLService) {
nsresult rv = CallGetService("@mozilla.org/xbl;1", &gXBLService);
if (NS_FAILED(rv))
gXBLService = nsnull;
}
return gXBLService;
}
void
nsCSSFrameConstructor::GeneratedContentFrameRemoved(nsIFrame* aFrame)
{
if (mQuoteList.DestroyNodesFor(aFrame))
QuotesDirty();
}
nsresult
nsCSSFrameConstructor::CreateGeneratedFrameFor(nsIFrame* aParentFrame,
nsIContent* aContent,
nsStyleContext* aStyleContext,
const nsStyleContent* aStyleContent,
PRUint32 aContentIndex,
nsIFrame** aFrame)
{
*aFrame = nsnull; // initialize OUT parameter
// The QuoteList needs the content attached to the frame.
nsCOMPtr<nsIDOMCharacterData>* textPtr = nsnull;
// Get the content value
const nsStyleContentData &data = aStyleContent->ContentAt(aContentIndex);
nsStyleContentType type = data.mType;
nsCOMPtr<nsIContent> content;
nsPresContext* presContext = mPresShell->GetPresContext();
if (eStyleContentType_Image == type) {
if (!data.mContent.mImage) {
// CSS had something specified that couldn't be converted to an
// image object
*aFrame = nsnull;
return NS_ERROR_FAILURE;
}
// Create an image content object and pass it the image request.
// XXX Check if it's an image type we can handle...
nsCOMPtr<nsINodeInfo> nodeInfo;
mDocument->NodeInfoManager()->GetNodeInfo(nsHTMLAtoms::img, nsnull,
kNameSpaceID_None,
getter_AddRefs(nodeInfo));
nsresult rv = NS_NewGenConImageContent(getter_AddRefs(content), nodeInfo,
data.mContent.mImage);
NS_ENSURE_SUCCESS(rv, rv);
// Set aContent as the parent content and set the document object. This
// way event handling works
content->SetParent(aContent);
content->SetDocument(mDocument, PR_TRUE, PR_TRUE);
content->SetNativeAnonymous(PR_TRUE);
// hack to make document rules not match (not like it matters, since we
// already have a non-element style context... which is totally wacky, but
// anyway).
content->SetBindingParent(content);
// Create an image frame and initialize it
nsIFrame* imageFrame = nsnull;
rv = NS_NewImageFrame(mPresShell, &imageFrame);
if (!imageFrame) {
return rv;
}
rv = imageFrame->Init(presContext, content, aParentFrame, aStyleContext,
nsnull);
if (NS_FAILED(rv)) {
imageFrame->Destroy(presContext);
return rv == NS_ERROR_FRAME_REPLACED ? NS_OK : rv;
}
// Return the image frame
*aFrame = imageFrame;
} else {
nsAutoString contentString(data.mContent.mString);
switch (type) {
case eStyleContentType_String:
break;
case eStyleContentType_Attr:
{
nsCOMPtr<nsIAtom> attrName;
PRInt32 attrNameSpace = kNameSpaceID_None;
PRInt32 barIndex = contentString.FindChar('|'); // CSS namespace delimiter
if (-1 != barIndex) {
nsAutoString nameSpaceVal;
contentString.Left(nameSpaceVal, barIndex);
PRInt32 error;
attrNameSpace = nameSpaceVal.ToInteger(&error, 10);
contentString.Cut(0, barIndex + 1);
if (contentString.Length()) {
attrName = do_GetAtom(contentString);
}
}
else {
attrName = do_GetAtom(contentString);
}
if (!attrName) {
return NS_ERROR_OUT_OF_MEMORY;
}
// Creates the content and frame and return if successful
nsresult rv = NS_ERROR_FAILURE;
if (attrName) {
nsIFrame* textFrame = nsnull;
rv = NS_NewAttributeContent(aContent, attrNameSpace, attrName,
getter_AddRefs(content));
NS_ENSURE_SUCCESS(rv, rv);
// Set aContent as the parent content so that event handling works.
content->SetParent(aContent);
content->SetDocument(mDocument, PR_TRUE, PR_TRUE);
content->SetNativeAnonymous(PR_TRUE);
content->SetBindingParent(content);
// Create a text frame and initialize it
NS_NewTextFrame(mPresShell, &textFrame);
textFrame->Init(presContext, content, aParentFrame, aStyleContext,
nsnull);
// Return the text frame
*aFrame = textFrame;
rv = NS_OK;
}
}
break;
case eStyleContentType_Counter:
case eStyleContentType_Counters:
return NS_ERROR_NOT_IMPLEMENTED; // XXX not supported yet...
case eStyleContentType_Image:
NS_NOTREACHED("handled by if above");
return NS_ERROR_UNEXPECTED;
case eStyleContentType_OpenQuote:
case eStyleContentType_CloseQuote:
case eStyleContentType_NoOpenQuote:
case eStyleContentType_NoCloseQuote:
{
nsQuoteListNode* node =
new nsQuoteListNode(type, aParentFrame, aContentIndex);
if (!node)
return NS_ERROR_OUT_OF_MEMORY;
mQuoteList.Insert(node);
if (!mQuoteList.IsLast(node))
QuotesDirty();
// Don't generate a text node or any text for 'no-open-quote' and
// 'no-close-quote'.
if (node->IsHiddenQuote())
return NS_OK;
textPtr = &node->mText; // Delayed storage of text node.
contentString = *node->Text();
}
break;
} // switch
if (!content) {
// Create a text content node
nsIFrame* textFrame = nsnull;
nsCOMPtr<nsITextContent> textContent;
NS_NewTextNode(getter_AddRefs(textContent));
if (textContent) {
// Set the text
textContent->SetText(contentString, PR_TRUE);
if (textPtr)
*textPtr = do_QueryInterface(textContent);
// Set aContent as the parent content so that event handling works.
textContent->SetParent(aContent);
textContent->SetDocument(mDocument, PR_TRUE, PR_TRUE);
textContent->SetNativeAnonymous(PR_TRUE);
textContent->SetBindingParent(textContent);
// Create a text frame and initialize it
NS_NewTextFrame(mPresShell, &textFrame);
if (!textFrame) {
return NS_ERROR_OUT_OF_MEMORY;
}
textFrame->Init(presContext, textContent, aParentFrame, aStyleContext,
nsnull);
content = textContent;
}
// Return the text frame
*aFrame = textFrame;
}
}
if (content) {
nsCOMPtr<nsISupportsArray> anonymousItems;
nsresult rv = NS_NewISupportsArray(getter_AddRefs(anonymousItems));
NS_ENSURE_SUCCESS(rv, rv);
anonymousItems->AppendElement(content);
mPresShell->SetAnonymousContentFor(aContent, anonymousItems);
}
return NS_OK;
}
/*
*
* aFrame - the frame that should be the parent of the generated
* content. This is the frame for the corresponding content node,
* which must not be a leaf frame.
*/
PRBool
nsCSSFrameConstructor::CreateGeneratedContentFrame(nsFrameConstructorState& aState,
nsIFrame* aFrame,
nsIContent* aContent,
nsStyleContext* aStyleContext,
nsIAtom* aPseudoElement,
nsIFrame** aResult)
{
*aResult = nsnull; // initialize OUT parameter
if (!aContent->IsContentOfType(nsIContent::eELEMENT))
return PR_FALSE;
nsStyleSet *styleSet = mPresShell->StyleSet();
// Probe for the existence of the pseudo-element
nsRefPtr<nsStyleContext> pseudoStyleContext;
pseudoStyleContext = styleSet->ProbePseudoStyleFor(aContent,
aPseudoElement,
aStyleContext);
if (pseudoStyleContext) {
// |ProbePseudoStyleContext| checks the 'display' property and the
// |ContentCount()| of the 'content' property for us.
// Create a block box or an inline box depending on the value of
// the 'display' property
nsIFrame* containerFrame;
nsFrameItems childFrames;
if (NS_STYLE_DISPLAY_BLOCK ==
pseudoStyleContext->GetStyleDisplay()->mDisplay) {
NS_NewBlockFrame(mPresShell, &containerFrame);
} else {
NS_NewInlineFrame(mPresShell, &containerFrame);
}
InitAndRestoreFrame(aState, aContent, aFrame, pseudoStyleContext, nsnull,
containerFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(containerFrame, nsnull, PR_FALSE);
// Mark the frame as being associated with generated content
containerFrame->AddStateBits(NS_FRAME_GENERATED_CONTENT);
// Create another pseudo style context to use for all the generated child
// frames
nsRefPtr<nsStyleContext> textStyleContext;
textStyleContext = styleSet->ResolveStyleForNonElement(pseudoStyleContext);
// Now create content objects (and child frames) for each value of the
// 'content' property
const nsStyleContent* styleContent = pseudoStyleContext->GetStyleContent();
PRUint32 contentCount = styleContent->ContentCount();
for (PRUint32 contentIndex = 0; contentIndex < contentCount; contentIndex++) {
nsIFrame* frame;
// Create a frame
nsresult result;
result = CreateGeneratedFrameFor(containerFrame,
aContent, textStyleContext,
styleContent, contentIndex, &frame);
// Non-elements can't possibly have a view, so don't bother checking
if (NS_SUCCEEDED(result) && frame) {
// Add it to the list of child frames
childFrames.AddChild(frame);
}
}
if (childFrames.childList) {
containerFrame->SetInitialChildList(aState.mPresContext, nsnull, childFrames.childList);
}
*aResult = containerFrame;
return PR_TRUE;
}
return PR_FALSE;
}
nsresult
nsCSSFrameConstructor::CreateInputFrame(nsIContent *aContent,
nsIFrame **aFrame,
nsStyleContext *aStyleContext)
{
nsCOMPtr<nsIFormControl> control = do_QueryInterface(aContent);
NS_ASSERTION(control, "input is not an nsIFormControl!");
switch (control->GetType()) {
case NS_FORM_INPUT_SUBMIT:
case NS_FORM_INPUT_RESET:
case NS_FORM_INPUT_BUTTON:
if (gUseXBLForms)
return NS_OK; // upddate IsSpecialHTMLContent if this becomes functional
return NS_NewGfxButtonControlFrame(mPresShell, aFrame);
case NS_FORM_INPUT_CHECKBOX:
if (gUseXBLForms)
return NS_OK; // see comment above
return ConstructCheckboxControlFrame(aFrame, aContent, aStyleContext);
case NS_FORM_INPUT_RADIO:
if (gUseXBLForms)
return NS_OK; // see comment above
return ConstructRadioControlFrame(aFrame, aContent, aStyleContext);
case NS_FORM_INPUT_FILE:
{
nsresult rv = NS_NewFileControlFrame(mPresShell, aFrame);
if (NS_SUCCEEDED(rv)) {
// The (block-like) file control frame should have a space manager
(*aFrame)->AddStateBits(NS_BLOCK_SPACE_MGR);
}
return rv;
}
case NS_FORM_INPUT_HIDDEN:
return NS_OK; // this does not create a frame so it needs special handling
// in IsSpecialHTMLContent
case NS_FORM_INPUT_IMAGE:
return NS_NewImageControlFrame(mPresShell, aFrame);
case NS_FORM_INPUT_TEXT:
case NS_FORM_INPUT_PASSWORD:
return NS_NewTextControlFrame(mPresShell, aFrame);
default:
NS_ASSERTION(0, "Unknown input type!");
return NS_ERROR_INVALID_ARG;
}
}
static PRBool
IsOnlyWhitespace(nsIContent* aContent)
{
PRBool onlyWhiteSpace = PR_FALSE;
if (aContent->IsContentOfType(nsIContent::eTEXT)) {
nsCOMPtr<nsITextContent> textContent = do_QueryInterface(aContent);
onlyWhiteSpace = textContent->IsOnlyWhitespace();
}
return onlyWhiteSpace;
}
/****************************************************
** BEGIN TABLE SECTION
****************************************************/
// The term pseudo frame is being used instead of anonymous frame, since anonymous
// frame has been used elsewhere to refer to frames that have generated content
// aIncludeSpecial applies to captions, col groups, cols and cells.
// These do not generate pseudo frame wrappers for foreign children.
static PRBool
IsTableRelated(PRUint8 aDisplay,
PRBool aIncludeSpecial)
{
if ((aDisplay == NS_STYLE_DISPLAY_TABLE) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_HEADER_GROUP) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_ROW_GROUP) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_ROW)) {
return PR_TRUE;
}
else if (aIncludeSpecial &&
((aDisplay == NS_STYLE_DISPLAY_TABLE_CAPTION) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_COLUMN) ||
(aDisplay == NS_STYLE_DISPLAY_TABLE_CELL))) {
return PR_TRUE;
}
else return PR_FALSE;
}
static PRBool
IsTableRelated(nsIAtom* aParentType,
PRBool aIncludeSpecial)
{
if ((nsLayoutAtoms::tableFrame == aParentType) ||
(nsLayoutAtoms::tableRowGroupFrame == aParentType) ||
(nsLayoutAtoms::tableRowFrame == aParentType)) {
return PR_TRUE;
}
else if (aIncludeSpecial &&
((nsLayoutAtoms::tableCaptionFrame == aParentType) ||
(nsLayoutAtoms::tableColGroupFrame == aParentType) ||
(nsLayoutAtoms::tableColFrame == aParentType) ||
IS_TABLE_CELL(aParentType))) {
return PR_TRUE;
}
else return PR_FALSE;
}
static nsIFrame*
GetOuterTableFrame(nsIFrame* aParentFrame)
{
if (nsLayoutAtoms::tableOuterFrame == aParentFrame->GetType()) {
return aParentFrame;
}
return aParentFrame->GetParent();
}
static nsresult
ProcessPseudoFrame(nsPresContext* aPresContext,
nsPseudoFrameData& aPseudoData,
nsIFrame*& aParent)
{
nsresult rv = NS_OK;
if (!aPresContext) return rv;
aParent = aPseudoData.mFrame;
nsFrameItems* items = &aPseudoData.mChildList;
if (items && items->childList) {
rv = aParent->SetInitialChildList(aPresContext, nsnull, items->childList);
if (NS_FAILED(rv)) return rv;
}
aPseudoData.Reset();
return rv;
}
static nsresult
ProcessPseudoTableFrame(nsPresContext* aPresContext,
nsPseudoFrames& aPseudoFrames,
nsIFrame*& aParent)
{
nsresult rv = NS_OK;
if (!aPresContext) return rv;
// process the col group frame, if it exists
if (aPseudoFrames.mColGroup.mFrame) {
rv = ProcessPseudoFrame(aPresContext, aPseudoFrames.mColGroup, aParent);
}
// process the inner table frame
rv = ProcessPseudoFrame(aPresContext, aPseudoFrames.mTableInner, aParent);
// process the outer table frame
aParent = aPseudoFrames.mTableOuter.mFrame;
nsFrameItems* items = &aPseudoFrames.mTableOuter.mChildList;
if (items && items->childList) {
rv = aParent->SetInitialChildList(aPresContext, nsnull, items->childList);
if (NS_FAILED(rv)) return rv;
}
nsFrameItems* captions = &aPseudoFrames.mTableOuter.mChildList2;
if (captions && captions->childList) {
rv = aParent->SetInitialChildList(aPresContext, nsLayoutAtoms::captionList, captions->childList);
}
aPseudoFrames.mTableOuter.Reset();
return rv;
}
static nsresult
ProcessPseudoCellFrame(nsPresContext* aPresContext,
nsPseudoFrames& aPseudoFrames,
nsIFrame*& aParent)
{
nsresult rv = NS_OK;
if (!aPresContext) return rv;
rv = ProcessPseudoFrame(aPresContext, aPseudoFrames.mCellInner, aParent);
if (NS_FAILED(rv)) return rv;
rv = ProcessPseudoFrame(aPresContext, aPseudoFrames.mCellOuter, aParent);
return rv;
}
// limit the processing up to the frame type indicated by aHighestType.
// make a complete processing when aHighestType is null
static nsresult
ProcessPseudoFrames(nsFrameConstructorState& aState,
nsIAtom* aHighestType,
nsIFrame*& aHighestFrame)
{
nsresult rv = NS_OK;
aHighestFrame = nsnull;
nsPseudoFrames& pseudoFrames = aState.mPseudoFrames;
nsPresContext* presContext = aState.mPresContext;
if (nsLayoutAtoms::tableFrame == pseudoFrames.mLowestType) {
// if the processing should be limited to the colgroup frame and the
// table frame is the lowest type of created pseudo frames that
// can have pseudo frame children, process only the colgroup pseudo frames
// and leave the table frame untouched.
if (nsLayoutAtoms::tableColGroupFrame == aHighestType) {
if (pseudoFrames.mColGroup.mFrame) {
rv = ProcessPseudoFrame(presContext, pseudoFrames.mColGroup,
aHighestFrame);
}
return rv;
}
rv = ProcessPseudoTableFrame(presContext, pseudoFrames, aHighestFrame);
if (nsLayoutAtoms::tableOuterFrame == aHighestType) return rv;
if (pseudoFrames.mCellOuter.mFrame) {
rv = ProcessPseudoCellFrame(presContext, pseudoFrames, aHighestFrame);
if (IS_TABLE_CELL(aHighestType)) return rv;
}
if (pseudoFrames.mRow.mFrame) {
rv = ProcessPseudoFrame(presContext, pseudoFrames.mRow, aHighestFrame);
if (nsLayoutAtoms::tableRowFrame == aHighestType) return rv;
}
if (pseudoFrames.mRowGroup.mFrame) {
rv = ProcessPseudoFrame(presContext, pseudoFrames.mRowGroup, aHighestFrame);
if (nsLayoutAtoms::tableRowGroupFrame == aHighestType) return rv;
}
}
else if (nsLayoutAtoms::tableRowGroupFrame == pseudoFrames.mLowestType) {
rv = ProcessPseudoFrame(presContext, pseudoFrames.mRowGroup, aHighestFrame);
if (nsLayoutAtoms::tableRowGroupFrame == aHighestType) return rv;
if (pseudoFrames.mTableOuter.mFrame) {
rv = ProcessPseudoTableFrame(presContext, pseudoFrames, aHighestFrame);
if (nsLayoutAtoms::tableOuterFrame == aHighestType) return rv;
}
if (pseudoFrames.mCellOuter.mFrame) {
rv = ProcessPseudoCellFrame(presContext, pseudoFrames, aHighestFrame);
if (IS_TABLE_CELL(aHighestType)) return rv;
}
if (pseudoFrames.mRow.mFrame) {
rv = ProcessPseudoFrame(presContext, pseudoFrames.mRow, aHighestFrame);
if (nsLayoutAtoms::tableRowFrame == aHighestType) return rv;
}
}
else if (nsLayoutAtoms::tableRowFrame == pseudoFrames.mLowestType) {
rv = ProcessPseudoFrame(presContext, pseudoFrames.mRow, aHighestFrame);
if (nsLayoutAtoms::tableRowFrame == aHighestType) return rv;
if (pseudoFrames.mRowGroup.mFrame) {
rv = ProcessPseudoFrame(presContext, pseudoFrames.mRowGroup, aHighestFrame);
if (nsLayoutAtoms::tableRowGroupFrame == aHighestType) return rv;
}
if (pseudoFrames.mTableOuter.mFrame) {
rv = ProcessPseudoTableFrame(presContext, pseudoFrames, aHighestFrame);
if (nsLayoutAtoms::tableOuterFrame == aHighestType) return rv;
}
if (pseudoFrames.mCellOuter.mFrame) {
rv = ProcessPseudoCellFrame(presContext, pseudoFrames, aHighestFrame);
if (IS_TABLE_CELL(aHighestType)) return rv;
}
}
else if (IS_TABLE_CELL(pseudoFrames.mLowestType)) {
rv = ProcessPseudoCellFrame(presContext, pseudoFrames, aHighestFrame);
if (IS_TABLE_CELL(aHighestType)) return rv;
if (pseudoFrames.mRow.mFrame) {
rv = ProcessPseudoFrame(presContext, pseudoFrames.mRow, aHighestFrame);
if (nsLayoutAtoms::tableRowFrame == aHighestType) return rv;
}
if (pseudoFrames.mRowGroup.mFrame) {
rv = ProcessPseudoFrame(presContext, pseudoFrames.mRowGroup, aHighestFrame);
if (nsLayoutAtoms::tableRowGroupFrame == aHighestType) return rv;
}
if (pseudoFrames.mTableOuter.mFrame) {
rv = ProcessPseudoTableFrame(presContext, pseudoFrames, aHighestFrame);
}
}
else if (pseudoFrames.mColGroup.mFrame) {
// process the col group frame
rv = ProcessPseudoFrame(presContext, pseudoFrames.mColGroup, aHighestFrame);
}
return rv;
}
static nsresult
ProcessPseudoFrames(nsFrameConstructorState& aState,
nsFrameItems& aItems)
{
nsIFrame* highestFrame;
nsresult rv = ProcessPseudoFrames(aState, nsnull, highestFrame);
if (highestFrame) {
aItems.AddChild(highestFrame);
}
aState.mPseudoFrames.Reset();
return rv;
}
static nsresult
ProcessPseudoFrames(nsFrameConstructorState& aState,
nsIAtom* aHighestType)
{
nsIFrame* highestFrame;
nsresult rv = ProcessPseudoFrames(aState, aHighestType, highestFrame);
return rv;
}
nsresult
nsCSSFrameConstructor::CreatePseudoTableFrame(nsTableCreator& aTableCreator,
nsFrameConstructorState& aState,
nsIFrame* aParentFrameIn)
{
nsresult rv = NS_OK;
nsIFrame* parentFrame = (aState.mPseudoFrames.mCellInner.mFrame)
? aState.mPseudoFrames.mCellInner.mFrame : aParentFrameIn;
if (!parentFrame) return rv;
nsStyleContext *parentStyle;
nsRefPtr<nsStyleContext> childStyle;
parentStyle = parentFrame->GetStyleContext();
nsIContent* parentContent = parentFrame->GetContent();
// create the SC for the inner table which will be the parent of the outer table's SC
childStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(parentContent,
nsCSSAnonBoxes::table,
parentStyle);
nsPseudoFrameData& pseudoOuter = aState.mPseudoFrames.mTableOuter;
nsPseudoFrameData& pseudoInner = aState.mPseudoFrames.mTableInner;
// construct the pseudo outer and inner as part of the pseudo frames
nsFrameItems items;
rv = ConstructTableFrame(aState, parentContent,
parentFrame, childStyle, aTableCreator,
PR_TRUE, items, pseudoOuter.mFrame,
pseudoInner.mFrame);
if (NS_FAILED(rv)) return rv;
// set pseudo data for the newly created frames
pseudoOuter.mChildList.AddChild(pseudoInner.mFrame);
aState.mPseudoFrames.mLowestType = nsLayoutAtoms::tableFrame;
// set pseudo data for the parent
if (aState.mPseudoFrames.mCellInner.mFrame) {
aState.mPseudoFrames.mCellInner.mChildList.AddChild(pseudoOuter.mFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::CreatePseudoRowGroupFrame(nsTableCreator& aTableCreator,
nsFrameConstructorState& aState,
nsIFrame* aParentFrameIn)
{
nsresult rv = NS_OK;
nsIFrame* parentFrame = (aState.mPseudoFrames.mTableInner.mFrame)
? aState.mPseudoFrames.mTableInner.mFrame : aParentFrameIn;
if (!parentFrame) return rv;
nsStyleContext *parentStyle;
nsRefPtr<nsStyleContext> childStyle;
parentStyle = parentFrame->GetStyleContext();
nsIContent* parentContent = parentFrame->GetContent();
childStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(parentContent,
nsCSSAnonBoxes::tableRowGroup,
parentStyle);
nsPseudoFrameData& pseudo = aState.mPseudoFrames.mRowGroup;
// construct the pseudo row group as part of the pseudo frames
PRBool pseudoParent;
nsFrameItems items;
rv = ConstructTableRowGroupFrame(aState, parentContent,
parentFrame, childStyle, aTableCreator,
PR_TRUE, items, pseudo.mFrame, pseudoParent);
if (NS_FAILED(rv)) return rv;
// set pseudo data for the newly created frames
aState.mPseudoFrames.mLowestType = nsLayoutAtoms::tableRowGroupFrame;
// set pseudo data for the parent
if (aState.mPseudoFrames.mTableInner.mFrame) {
aState.mPseudoFrames.mTableInner.mChildList.AddChild(pseudo.mFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::CreatePseudoColGroupFrame(nsTableCreator& aTableCreator,
nsFrameConstructorState& aState,
nsIFrame* aParentFrameIn)
{
nsresult rv = NS_OK;
nsIFrame* parentFrame = (aState.mPseudoFrames.mTableInner.mFrame)
? aState.mPseudoFrames.mTableInner.mFrame : aParentFrameIn;
if (!parentFrame) return rv;
nsStyleContext *parentStyle;
nsRefPtr<nsStyleContext> childStyle;
parentStyle = parentFrame->GetStyleContext();
nsIContent* parentContent = parentFrame->GetContent();
childStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(parentContent,
nsCSSAnonBoxes::tableColGroup,
parentStyle);
nsPseudoFrameData& pseudo = aState.mPseudoFrames.mColGroup;
// construct the pseudo col group as part of the pseudo frames
PRBool pseudoParent;
nsFrameItems items;
rv = ConstructTableColGroupFrame(aState, parentContent,
parentFrame, childStyle, aTableCreator,
PR_TRUE, items, pseudo.mFrame, pseudoParent);
if (NS_FAILED(rv)) return rv;
((nsTableColGroupFrame*)pseudo.mFrame)->SetColType(eColGroupAnonymousCol);
// Do not set aState.mPseudoFrames.mLowestType here as colgroup frame will
// be always below a table frame but we can not descent any further as col
// frames can not have children and will not wrap table foreign frames.
// set pseudo data for the parent
if (aState.mPseudoFrames.mTableInner.mFrame) {
aState.mPseudoFrames.mTableInner.mChildList.AddChild(pseudo.mFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::CreatePseudoRowFrame(nsTableCreator& aTableCreator,
nsFrameConstructorState& aState,
nsIFrame* aParentFrameIn)
{
nsresult rv = NS_OK;
nsIFrame* parentFrame = (aState.mPseudoFrames.mRowGroup.mFrame)
? aState.mPseudoFrames.mRowGroup.mFrame : aParentFrameIn;
if (!parentFrame) return rv;
nsStyleContext *parentStyle;
nsRefPtr<nsStyleContext> childStyle;
parentStyle = parentFrame->GetStyleContext();
nsIContent* parentContent = parentFrame->GetContent();
childStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(parentContent,
nsCSSAnonBoxes::tableRow,
parentStyle);
nsPseudoFrameData& pseudo = aState.mPseudoFrames.mRow;
// construct the pseudo row as part of the pseudo frames
PRBool pseudoParent;
nsFrameItems items;
rv = ConstructTableRowFrame(aState, parentContent,
parentFrame, childStyle, aTableCreator,
PR_TRUE, items, pseudo.mFrame, pseudoParent);
if (NS_FAILED(rv)) return rv;
aState.mPseudoFrames.mLowestType = nsLayoutAtoms::tableRowFrame;
// set pseudo data for the parent
if (aState.mPseudoFrames.mRowGroup.mFrame) {
aState.mPseudoFrames.mRowGroup.mChildList.AddChild(pseudo.mFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::CreatePseudoCellFrame(nsTableCreator& aTableCreator,
nsFrameConstructorState& aState,
nsIFrame* aParentFrameIn)
{
nsresult rv = NS_OK;
nsIFrame* parentFrame = (aState.mPseudoFrames.mRow.mFrame)
? aState.mPseudoFrames.mRow.mFrame : aParentFrameIn;
if (!parentFrame) return rv;
nsStyleContext *parentStyle;
nsRefPtr<nsStyleContext> childStyle;
parentStyle = parentFrame->GetStyleContext();
nsIContent* parentContent = parentFrame->GetContent();
childStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(parentContent,
nsCSSAnonBoxes::tableCell,
parentStyle);
nsPseudoFrameData& pseudoOuter = aState.mPseudoFrames.mCellOuter;
nsPseudoFrameData& pseudoInner = aState.mPseudoFrames.mCellInner;
// construct the pseudo outer and inner as part of the pseudo frames
PRBool pseudoParent;
nsFrameItems items;
rv = ConstructTableCellFrame(aState, parentContent, parentFrame, childStyle,
aTableCreator, PR_TRUE, items,
pseudoOuter.mFrame, pseudoInner.mFrame,
pseudoParent);
if (NS_FAILED(rv)) return rv;
// set pseudo data for the newly created frames
pseudoOuter.mChildList.AddChild(pseudoInner.mFrame);
// give it nsLayoutAtoms::tableCellFrame, if it is really nsLayoutAtoms::bcTableCellFrame, it will match later
aState.mPseudoFrames.mLowestType = nsLayoutAtoms::tableCellFrame;
// set pseudo data for the parent
if (aState.mPseudoFrames.mRow.mFrame) {
aState.mPseudoFrames.mRow.mChildList.AddChild(pseudoOuter.mFrame);
}
return rv;
}
// called if the parent is not a table
nsresult
nsCSSFrameConstructor::GetPseudoTableFrame(nsTableCreator& aTableCreator,
nsFrameConstructorState& aState,
nsIFrame& aParentFrameIn)
{
nsresult rv = NS_OK;
nsPseudoFrames& pseudoFrames = aState.mPseudoFrames;
nsIAtom* parentFrameType = aParentFrameIn.GetType();
if (pseudoFrames.IsEmpty()) {
PRBool created = PR_FALSE;
if (nsLayoutAtoms::tableRowGroupFrame == parentFrameType) { // row group parent
rv = CreatePseudoRowFrame(aTableCreator, aState, &aParentFrameIn);
if (NS_FAILED(rv)) return rv;
created = PR_TRUE;
}
if (created || (nsLayoutAtoms::tableRowFrame == parentFrameType)) { // row parent
rv = CreatePseudoCellFrame(aTableCreator, aState, &aParentFrameIn);
if (NS_FAILED(rv)) return rv;
}
rv = CreatePseudoTableFrame(aTableCreator, aState, &aParentFrameIn);
}
else {
if (!pseudoFrames.mTableInner.mFrame) {
if (pseudoFrames.mRowGroup.mFrame && !(pseudoFrames.mRow.mFrame)) {
rv = CreatePseudoRowFrame(aTableCreator, aState);
if (NS_FAILED(rv)) return rv;
}
if (pseudoFrames.mRow.mFrame && !(pseudoFrames.mCellOuter.mFrame)) {
rv = CreatePseudoCellFrame(aTableCreator, aState);
if (NS_FAILED(rv)) return rv;
}
CreatePseudoTableFrame(aTableCreator, aState);
}
}
return rv;
}
// called if the parent is not a col group
nsresult
nsCSSFrameConstructor::GetPseudoColGroupFrame(nsTableCreator& aTableCreator,
nsFrameConstructorState& aState,
nsIFrame& aParentFrameIn)
{
nsresult rv = NS_OK;
nsPseudoFrames& pseudoFrames = aState.mPseudoFrames;
nsIAtom* parentFrameType = aParentFrameIn.GetType();
if (pseudoFrames.IsEmpty()) {
PRBool created = PR_FALSE;
if (nsLayoutAtoms::tableRowGroupFrame == parentFrameType) { // row group parent
rv = CreatePseudoRowFrame(aTableCreator, aState, &aParentFrameIn);
created = PR_TRUE;
}
if (created || (nsLayoutAtoms::tableRowFrame == parentFrameType)) { // row parent
rv = CreatePseudoCellFrame(aTableCreator, aState, &aParentFrameIn);
created = PR_TRUE;
}
if (created || IS_TABLE_CELL(parentFrameType) || // cell parent
(nsLayoutAtoms::tableCaptionFrame == parentFrameType) || // caption parent
!IsTableRelated(parentFrameType, PR_TRUE)) { // block parent
rv = CreatePseudoTableFrame(aTableCreator, aState, &aParentFrameIn);
}
rv = CreatePseudoColGroupFrame(aTableCreator, aState, &aParentFrameIn);
}
else {
if (!pseudoFrames.mColGroup.mFrame) {
if (pseudoFrames.mRowGroup.mFrame && !(pseudoFrames.mRow.mFrame)) {
rv = CreatePseudoRowFrame(aTableCreator, aState);
}
if (pseudoFrames.mRow.mFrame && !(pseudoFrames.mCellOuter.mFrame)) {
rv = CreatePseudoCellFrame(aTableCreator, aState);
}
if (pseudoFrames.mCellOuter.mFrame && !(pseudoFrames.mTableOuter.mFrame)) {
rv = CreatePseudoTableFrame(aTableCreator, aState);
}
rv = CreatePseudoColGroupFrame(aTableCreator, aState);
}
}
return rv;
}
// called if the parent is not a row group
nsresult
nsCSSFrameConstructor::GetPseudoRowGroupFrame(nsTableCreator& aTableCreator,
nsFrameConstructorState& aState,
nsIFrame& aParentFrameIn)
{
nsresult rv = NS_OK;
nsPseudoFrames& pseudoFrames = aState.mPseudoFrames;
nsIAtom* parentFrameType = aParentFrameIn.GetType();
if (!pseudoFrames.mLowestType) {
PRBool created = PR_FALSE;
if (nsLayoutAtoms::tableRowFrame == parentFrameType) { // row parent
rv = CreatePseudoCellFrame(aTableCreator, aState, &aParentFrameIn);
created = PR_TRUE;
}
if (created || IS_TABLE_CELL(parentFrameType) || // cell parent
(nsLayoutAtoms::tableCaptionFrame == parentFrameType) || // caption parent
!IsTableRelated(parentFrameType, PR_TRUE)) { // block parent
rv = CreatePseudoTableFrame(aTableCreator, aState, &aParentFrameIn);
}
rv = CreatePseudoRowGroupFrame(aTableCreator, aState, &aParentFrameIn);
}
else {
if (!pseudoFrames.mRowGroup.mFrame) {
if (pseudoFrames.mRow.mFrame && !(pseudoFrames.mCellOuter.mFrame)) {
rv = CreatePseudoCellFrame(aTableCreator, aState);
}
if (pseudoFrames.mCellOuter.mFrame && !(pseudoFrames.mTableOuter.mFrame)) {
rv = CreatePseudoTableFrame(aTableCreator, aState);
}
rv = CreatePseudoRowGroupFrame(aTableCreator, aState);
}
}
return rv;
}
// called if the parent is not a row
nsresult
nsCSSFrameConstructor::GetPseudoRowFrame(nsTableCreator& aTableCreator,
nsFrameConstructorState& aState,
nsIFrame& aParentFrameIn)
{
nsresult rv = NS_OK;
nsPseudoFrames& pseudoFrames = aState.mPseudoFrames;
nsIAtom* parentFrameType = aParentFrameIn.GetType();
if (!pseudoFrames.mLowestType) {
PRBool created = PR_FALSE;
if (IS_TABLE_CELL(parentFrameType) || // cell parent
(nsLayoutAtoms::tableCaptionFrame == parentFrameType) || // caption parent
!IsTableRelated(parentFrameType, PR_TRUE)) { // block parent
rv = CreatePseudoTableFrame(aTableCreator, aState, &aParentFrameIn);
created = PR_TRUE;
}
if (created || (nsLayoutAtoms::tableFrame == parentFrameType)) { // table parent
rv = CreatePseudoRowGroupFrame(aTableCreator, aState, &aParentFrameIn);
}
rv = CreatePseudoRowFrame(aTableCreator, aState, &aParentFrameIn);
}
else {
if (!pseudoFrames.mRow.mFrame) {
if (pseudoFrames.mCellOuter.mFrame && !pseudoFrames.mTableOuter.mFrame) {
rv = CreatePseudoTableFrame(aTableCreator, aState);
}
if (pseudoFrames.mTableInner.mFrame && !(pseudoFrames.mRowGroup.mFrame)) {
rv = CreatePseudoRowGroupFrame(aTableCreator, aState);
}
rv = CreatePseudoRowFrame(aTableCreator, aState);
}
}
return rv;
}
// called if the parent is not a cell or block
nsresult
nsCSSFrameConstructor::GetPseudoCellFrame(nsTableCreator& aTableCreator,
nsFrameConstructorState& aState,
nsIFrame& aParentFrameIn)
{
nsresult rv = NS_OK;
nsPseudoFrames& pseudoFrames = aState.mPseudoFrames;
nsIAtom* parentFrameType = aParentFrameIn.GetType();
if (!pseudoFrames.mLowestType) {
PRBool created = PR_FALSE;
if (nsLayoutAtoms::tableFrame == parentFrameType) { // table parent
rv = CreatePseudoRowGroupFrame(aTableCreator, aState, &aParentFrameIn);
created = PR_TRUE;
}
if (created || (nsLayoutAtoms::tableRowGroupFrame == parentFrameType)) { // row group parent
rv = CreatePseudoRowFrame(aTableCreator, aState, &aParentFrameIn);
created = PR_TRUE;
}
rv = CreatePseudoCellFrame(aTableCreator, aState, &aParentFrameIn);
}
else if (!pseudoFrames.mCellOuter.mFrame) {
if (pseudoFrames.mTableInner.mFrame && !(pseudoFrames.mRowGroup.mFrame)) {
rv = CreatePseudoRowGroupFrame(aTableCreator, aState);
}
if (pseudoFrames.mRowGroup.mFrame && !(pseudoFrames.mRow.mFrame)) {
rv = CreatePseudoRowFrame(aTableCreator, aState);
}
rv = CreatePseudoCellFrame(aTableCreator, aState);
}
return rv;
}
nsresult
nsCSSFrameConstructor::GetParentFrame(nsTableCreator& aTableCreator,
nsIFrame& aParentFrameIn,
nsIAtom* aChildFrameType,
nsFrameConstructorState& aState,
nsIFrame*& aParentFrame,
PRBool& aIsPseudoParent)
{
nsresult rv = NS_OK;
nsIAtom* parentFrameType = aParentFrameIn.GetType();
nsIFrame* pseudoParentFrame = nsnull;
nsPseudoFrames& pseudoFrames = aState.mPseudoFrames;
aParentFrame = &aParentFrameIn;
aIsPseudoParent = PR_FALSE;
if (nsLayoutAtoms::tableOuterFrame == aChildFrameType) { // table child
if (IsTableRelated(parentFrameType, PR_TRUE) &&
(nsLayoutAtoms::tableCaptionFrame != parentFrameType) ) { // need pseudo cell parent
rv = GetPseudoCellFrame(aTableCreator, aState, aParentFrameIn);
if (NS_FAILED(rv)) return rv;
pseudoParentFrame = pseudoFrames.mCellInner.mFrame;
}
}
else if (nsLayoutAtoms::tableCaptionFrame == aChildFrameType) { // caption child
if (nsLayoutAtoms::tableOuterFrame != parentFrameType) { // need pseudo table parent
rv = GetPseudoTableFrame(aTableCreator, aState, aParentFrameIn);
if (NS_FAILED(rv)) return rv;
pseudoParentFrame = pseudoFrames.mTableOuter.mFrame;
}
}
else if (nsLayoutAtoms::tableColGroupFrame == aChildFrameType) { // col group child
if (nsLayoutAtoms::tableFrame != parentFrameType) { // need pseudo table parent
rv = GetPseudoTableFrame(aTableCreator, aState, aParentFrameIn);
if (NS_FAILED(rv)) return rv;
pseudoParentFrame = pseudoFrames.mTableInner.mFrame;
}
}
else if (nsLayoutAtoms::tableColFrame == aChildFrameType) { // col child
if (nsLayoutAtoms::tableColGroupFrame != parentFrameType) { // need pseudo col group parent
rv = GetPseudoColGroupFrame(aTableCreator, aState, aParentFrameIn);
if (NS_FAILED(rv)) return rv;
pseudoParentFrame = pseudoFrames.mColGroup.mFrame;
}
}
else if (nsLayoutAtoms::tableRowGroupFrame == aChildFrameType) { // row group child
// XXX can this go away?
if (nsLayoutAtoms::tableFrame != parentFrameType) {
// trees allow row groups to contain row groups, so don't create pseudo frames
rv = GetPseudoTableFrame(aTableCreator, aState, aParentFrameIn);
if (NS_FAILED(rv)) return rv;
pseudoParentFrame = pseudoFrames.mTableInner.mFrame;
}
}
else if (nsLayoutAtoms::tableRowFrame == aChildFrameType) { // row child
if (nsLayoutAtoms::tableRowGroupFrame != parentFrameType) { // need pseudo row group parent
rv = GetPseudoRowGroupFrame(aTableCreator, aState, aParentFrameIn);
if (NS_FAILED(rv)) return rv;
pseudoParentFrame = pseudoFrames.mRowGroup.mFrame;
}
}
else if (IS_TABLE_CELL(aChildFrameType)) { // cell child
if (nsLayoutAtoms::tableRowFrame != parentFrameType) { // need pseudo row parent
rv = GetPseudoRowFrame(aTableCreator, aState, aParentFrameIn);
if (NS_FAILED(rv)) return rv;
pseudoParentFrame = pseudoFrames.mRow.mFrame;
}
}
else if (nsLayoutAtoms::tableFrame == aChildFrameType) { // invalid
NS_ASSERTION(PR_FALSE, "GetParentFrame called on nsLayoutAtoms::tableFrame child");
}
else { // foreign frame
if (IsTableRelated(parentFrameType, PR_FALSE)) { // need pseudo cell parent
rv = GetPseudoCellFrame(aTableCreator, aState, aParentFrameIn);
if (NS_FAILED(rv)) return rv;
pseudoParentFrame = pseudoFrames.mCellInner.mFrame;
}
}
if (pseudoParentFrame) {
aParentFrame = pseudoParentFrame;
aIsPseudoParent = PR_TRUE;
}
return rv;
}
static PRBool
IsSpecialHTMLContent(nsIContent* aContent)
{
// Gross hack. Return true if this is a content node that we'd create an HTML
// frame for based on something other than display -- in other words if this
// is an HTML node that could never have a nsTableCellFrame, for example.
if (!aContent->IsContentOfType(nsIContent::eHTML)) {
return PR_FALSE;
}
nsIAtom* tag = aContent->Tag();
if (tag == nsHTMLAtoms::input) {
nsCOMPtr<nsIFormControl> control = do_QueryInterface(aContent);
if (control && NS_FORM_INPUT_HIDDEN == control->GetType())
return PR_FALSE; // input hidden does not create a special frame
}
return
tag == nsHTMLAtoms::img ||
tag == nsHTMLAtoms::br ||
tag == nsHTMLAtoms::wbr ||
tag == nsHTMLAtoms::input ||
tag == nsHTMLAtoms::textarea ||
tag == nsHTMLAtoms::select ||
tag == nsHTMLAtoms::object ||
tag == nsHTMLAtoms::applet ||
tag == nsHTMLAtoms::embed ||
tag == nsHTMLAtoms::fieldset ||
tag == nsHTMLAtoms::legend ||
tag == nsHTMLAtoms::frameset ||
tag == nsHTMLAtoms::iframe ||
tag == nsHTMLAtoms::spacer ||
tag == nsHTMLAtoms::button ||
tag == nsHTMLAtoms::isindex;
}
nsresult
nsCSSFrameConstructor::AdjustParentFrame(nsIContent* aChildContent,
const nsStyleDisplay* aChildDisplay,
nsIFrame* & aParentFrame,
nsFrameItems* & aFrameItems,
nsFrameConstructorState& aState,
nsFrameConstructorSaveState& aSaveState,
PRBool& aCreatedPseudo)
{
NS_PRECONDITION(aChildDisplay, "Must have child's display struct");
NS_PRECONDITION(aFrameItems, "Must have frame items to work with");
aCreatedPseudo = PR_FALSE;
if (!aParentFrame) {
// Nothing to do here
return NS_OK;
}
// If our parent is a table, table-row-group, or table-row, and
// we're not table-related in any way, we have to create table
// pseudo-frames so that we have a table cell to live in.
if (IsTableRelated(aParentFrame->GetType(), PR_FALSE) &&
(!IsTableRelated(aChildDisplay->mDisplay, PR_TRUE) ||
// Also need to create a pseudo-parent if the child is going to end up
// with a frame based on something other than display.
IsSpecialHTMLContent(aChildContent)) &&
// XXXbz evil hack for HTML forms.... see similar in
// nsCSSFrameConstructor::TableProcessChild. It should just go away.
(!aChildContent->IsContentOfType(nsIContent::eHTML) ||
!aChildContent->GetNodeInfo()->Equals(nsHTMLAtoms::form,
kNameSpaceID_None))) {
nsTableCreator tableCreator(aState.mPresShell);
nsresult rv = GetPseudoCellFrame(tableCreator, aState, *aParentFrame);
if (NS_FAILED(rv)) {
return rv;
}
NS_ASSERTION(aState.mPseudoFrames.mCellInner.mFrame,
"Must have inner cell frame now!");
aParentFrame = aState.mPseudoFrames.mCellInner.mFrame;
aFrameItems = &aState.mPseudoFrames.mCellInner.mChildList;
// We pushed an anonymous table cell. The inner block of this
// needs to become the float containing block.
aState.PushFloatContainingBlock(aParentFrame, aSaveState, PR_FALSE,
PR_FALSE);
aCreatedPseudo = PR_TRUE;
}
return NS_OK;
}
// Construct the outer, inner table frames and the children frames for the table.
// XXX Page break frames for pseudo table frames are not constructed to avoid the risk
// associated with revising the pseudo frame mechanism. The long term solution
// of having frames handle page-break-before/after will solve the problem.
nsresult
nsCSSFrameConstructor::ConstructTableFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aContentParent,
nsStyleContext* aStyleContext,
nsTableCreator& aTableCreator,
PRBool aIsPseudo,
nsFrameItems& aChildItems,
nsIFrame*& aNewOuterFrame,
nsIFrame*& aNewInnerFrame)
{
nsresult rv = NS_OK;
// Create the outer table frame which holds the caption and inner table frame
aTableCreator.CreateTableOuterFrame(&aNewOuterFrame);
nsIFrame* parentFrame = aContentParent;
nsFrameItems* frameItems = &aChildItems;
// We may need to push a float containing block
nsFrameConstructorSaveState floatSaveState;
if (!aIsPseudo) {
// this frame may have a pseudo parent
PRBool hasPseudoParent = PR_FALSE;
GetParentFrame(aTableCreator, *parentFrame, nsLayoutAtoms::tableOuterFrame,
aState, parentFrame, hasPseudoParent);
if (!hasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
if (hasPseudoParent) {
aState.PushFloatContainingBlock(parentFrame, floatSaveState,
PR_FALSE, PR_FALSE);
frameItems = &aState.mPseudoFrames.mCellInner.mChildList;
if (aState.mPseudoFrames.mTableOuter.mFrame) {
ProcessPseudoFrames(aState, nsLayoutAtoms::tableOuterFrame);
}
}
}
// create the pseudo SC for the outer table as a child of the inner SC
nsRefPtr<nsStyleContext> outerStyleContext;
outerStyleContext = mPresShell->StyleSet()->
ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::tableOuter, aStyleContext);
const nsStyleDisplay* disp = outerStyleContext->GetStyleDisplay();
nsIFrame* geometricParent = aState.GetGeometricParent(disp, parentFrame);
// Init the table outer frame and see if we need to create a view, e.g.
// the frame is absolutely positioned
InitAndRestoreFrame(aState, aContent, geometricParent, outerStyleContext,
nsnull, aNewOuterFrame);
nsHTMLContainerFrame::CreateViewForFrame(aNewOuterFrame, aContentParent,
PR_FALSE);
// Create the inner table frame
aTableCreator.CreateTableFrame(&aNewInnerFrame);
InitAndRestoreFrame(aState, aContent, aNewOuterFrame, aStyleContext, nsnull,
aNewInnerFrame);
if (!aIsPseudo) {
// Put the newly created frames into the right child list
aNewOuterFrame->SetInitialChildList(aState.mPresContext, nsnull,
aNewInnerFrame);
rv = aState.AddChild(aNewOuterFrame, *frameItems, disp, aContent,
outerStyleContext, parentFrame);
if (NS_FAILED(rv)) {
return rv;
}
nsFrameItems childItems;
nsIFrame* captionFrame;
rv = TableProcessChildren(aState, aContent, aNewInnerFrame,
aTableCreator, childItems, captionFrame);
// XXXbz what about cleaning up?
if (NS_FAILED(rv)) return rv;
// if there are any anonymous children for the table, create frames for them
CreateAnonymousFrames(nsnull, aState, aContent, aNewInnerFrame,
PR_FALSE, childItems);
// Set the inner table frame's initial primary list
aNewInnerFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
// Set the outer table frame's primary and option lists
if (captionFrame) {
aNewOuterFrame->SetInitialChildList(aState.mPresContext,
nsLayoutAtoms::captionList,
captionFrame);
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableCaptionFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrameIn,
nsStyleContext* aStyleContext,
nsTableCreator& aTableCreator,
nsFrameItems& aChildItems,
nsIFrame*& aNewFrame,
PRBool& aIsPseudoParent)
{
nsresult rv = NS_OK;
if (!aParentFrameIn) return rv;
nsIFrame* parentFrame = aParentFrameIn;
aIsPseudoParent = PR_FALSE;
// this frame may have a pseudo parent
GetParentFrame(aTableCreator, *aParentFrameIn,
nsLayoutAtoms::tableCaptionFrame, aState, parentFrame,
aIsPseudoParent);
if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
rv = aTableCreator.CreateTableCaptionFrame(&aNewFrame);
if (NS_FAILED(rv)) return rv;
InitAndRestoreFrame(aState, aContent, parentFrame, aStyleContext, nsnull,
aNewFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(aNewFrame, nsnull, PR_FALSE);
nsFrameItems childItems;
// pass in aTableCreator so ProcessChildren will call TableProcessChildren
rv = ProcessChildren(aState, aContent, aNewFrame,
PR_TRUE, childItems, PR_TRUE, &aTableCreator);
if (NS_FAILED(rv)) return rv;
aNewFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
if (aIsPseudoParent) {
aState.mPseudoFrames.mTableOuter.mChildList2.AddChild(aNewFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableRowGroupFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrameIn,
nsStyleContext* aStyleContext,
nsTableCreator& aTableCreator,
PRBool aIsPseudo,
nsFrameItems& aChildItems,
nsIFrame*& aNewFrame,
PRBool& aIsPseudoParent)
{
nsresult rv = NS_OK;
if (!aParentFrameIn) return rv;
nsIFrame* parentFrame = aParentFrameIn;
aIsPseudoParent = PR_FALSE;
if (!aIsPseudo) {
// this frame may have a pseudo parent
GetParentFrame(aTableCreator, *aParentFrameIn,
nsLayoutAtoms::tableRowGroupFrame, aState, parentFrame,
aIsPseudoParent);
if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
if (!aIsPseudo && aIsPseudoParent && aState.mPseudoFrames.mRowGroup.mFrame) {
ProcessPseudoFrames(aState, nsLayoutAtoms::tableRowGroupFrame);
}
}
const nsStyleDisplay* styleDisplay = aStyleContext->GetStyleDisplay();
rv = aTableCreator.CreateTableRowGroupFrame(&aNewFrame);
nsIFrame* scrollFrame = nsnull;
if (styleDisplay->IsScrollableOverflow()) {
// Create an area container for the frame
BuildScrollFrame(aState, aContent, aStyleContext, aNewFrame, parentFrame,
nsnull, scrollFrame, aStyleContext);
}
else {
if (NS_FAILED(rv)) return rv;
InitAndRestoreFrame(aState, aContent, parentFrame, aStyleContext, nsnull,
aNewFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(aNewFrame, nsnull, PR_FALSE);
}
if (!aIsPseudo) {
nsFrameItems childItems;
nsIFrame* captionFrame;
rv = TableProcessChildren(aState, aContent, aNewFrame, aTableCreator,
childItems, captionFrame);
if (NS_FAILED(rv)) return rv;
// if there are any anonymous children for the table, create frames for them
CreateAnonymousFrames(nsnull, aState, aContent, aNewFrame,
PR_FALSE, childItems);
aNewFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
if (aIsPseudoParent) {
nsIFrame* child = (scrollFrame) ? scrollFrame : aNewFrame;
aState.mPseudoFrames.mTableInner.mChildList.AddChild(child);
}
}
// if there is a scroll frame, use it as the one constructed
if (scrollFrame) {
aNewFrame = scrollFrame;
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableColGroupFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrameIn,
nsStyleContext* aStyleContext,
nsTableCreator& aTableCreator,
PRBool aIsPseudo,
nsFrameItems& aChildItems,
nsIFrame*& aNewFrame,
PRBool& aIsPseudoParent)
{
nsresult rv = NS_OK;
if (!aParentFrameIn) return rv;
nsIFrame* parentFrame = aParentFrameIn;
aIsPseudoParent = PR_FALSE;
if (!aIsPseudo) {
// this frame may have a pseudo parent
GetParentFrame(aTableCreator, *aParentFrameIn,
nsLayoutAtoms::tableColGroupFrame, aState, parentFrame,
aIsPseudoParent);
if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
if (!aIsPseudo && aIsPseudoParent && aState.mPseudoFrames.mColGroup.mFrame) {
ProcessPseudoFrames(aState, nsLayoutAtoms::tableColGroupFrame);
}
}
rv = aTableCreator.CreateTableColGroupFrame(&aNewFrame);
if (NS_FAILED(rv)) return rv;
InitAndRestoreFrame(aState, aContent, parentFrame, aStyleContext, nsnull,
aNewFrame);
if (!aIsPseudo) {
nsFrameItems childItems;
nsIFrame* captionFrame;
rv = TableProcessChildren(aState, aContent, aNewFrame, aTableCreator,
childItems, captionFrame);
if (NS_FAILED(rv)) return rv;
aNewFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
if (aIsPseudoParent) {
aState.mPseudoFrames.mTableInner.mChildList.AddChild(aNewFrame);
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableRowFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrameIn,
nsStyleContext* aStyleContext,
nsTableCreator& aTableCreator,
PRBool aIsPseudo,
nsFrameItems& aChildItems,
nsIFrame*& aNewFrame,
PRBool& aIsPseudoParent)
{
nsresult rv = NS_OK;
if (!aParentFrameIn) return rv;
nsIFrame* parentFrame = aParentFrameIn;
aIsPseudoParent = PR_FALSE;
if (!aIsPseudo) {
// this frame may have a pseudo parent
GetParentFrame(aTableCreator, *aParentFrameIn,
nsLayoutAtoms::tableRowFrame, aState, parentFrame,
aIsPseudoParent);
if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
if (!aIsPseudo && aIsPseudoParent && aState.mPseudoFrames.mRow.mFrame) {
ProcessPseudoFrames(aState, nsLayoutAtoms::tableRowFrame);
}
}
rv = aTableCreator.CreateTableRowFrame(&aNewFrame);
if (NS_FAILED(rv)) return rv;
InitAndRestoreFrame(aState, aContent, parentFrame, aStyleContext, nsnull,
aNewFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(aNewFrame, nsnull, PR_FALSE);
if (!aIsPseudo) {
nsFrameItems childItems;
nsIFrame* captionFrame;
rv = TableProcessChildren(aState, aContent, aNewFrame, aTableCreator,
childItems, captionFrame);
if (NS_FAILED(rv)) return rv;
// if there are any anonymous children for the table, create frames for them
CreateAnonymousFrames(nsnull, aState, aContent, aNewFrame,
PR_FALSE, childItems);
aNewFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
if (aIsPseudoParent) {
aState.mPseudoFrames.mRowGroup.mChildList.AddChild(aNewFrame);
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableColFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrameIn,
nsStyleContext* aStyleContext,
nsTableCreator& aTableCreator,
PRBool aIsPseudo,
nsFrameItems& aChildItems,
nsIFrame*& aNewFrame,
PRBool& aIsPseudoParent)
{
nsresult rv = NS_OK;
if (!aParentFrameIn || !aStyleContext) return rv;
nsIFrame* parentFrame = aParentFrameIn;
aIsPseudoParent = PR_FALSE;
if (!aIsPseudo) {
// this frame may have a pseudo parent
GetParentFrame(aTableCreator, *aParentFrameIn,
nsLayoutAtoms::tableColFrame, aState, parentFrame,
aIsPseudoParent);
if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
}
rv = aTableCreator.CreateTableColFrame(&aNewFrame);
if (NS_FAILED(rv)) return rv;
InitAndRestoreFrame(aState, aContent, parentFrame, aStyleContext, nsnull,
aNewFrame);
// if the parent frame was anonymous then reparent the style context
if (aIsPseudoParent) {
aState.mFrameManager->
ReParentStyleContext(aNewFrame, parentFrame->GetStyleContext());
}
// construct additional col frames if the col frame has a span > 1
PRInt32 span = 1;
nsCOMPtr<nsIDOMHTMLTableColElement> cgContent(do_QueryInterface(aContent));
if (cgContent) {
cgContent->GetSpan(&span);
nsIFrame* lastCol = aNewFrame;
nsStyleContext* styleContext = nsnull;
for (PRInt32 spanX = 1; spanX < span; spanX++) {
// The same content node should always resolve to the same style context.
if (1 == spanX)
styleContext = aNewFrame->GetStyleContext();
nsIFrame* newCol;
rv = aTableCreator.CreateTableColFrame(&newCol);
if (NS_FAILED(rv)) return rv;
InitAndRestoreFrame(aState, aContent, parentFrame, styleContext, nsnull,
newCol);
((nsTableColFrame*)newCol)->SetColType(eColAnonymousCol);
lastCol->SetNextSibling(newCol);
lastCol = newCol;
}
}
if (!aIsPseudo && aIsPseudoParent) {
aState.mPseudoFrames.mColGroup.mChildList.AddChild(aNewFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructTableCellFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrameIn,
nsStyleContext* aStyleContext,
nsTableCreator& aTableCreator,
PRBool aIsPseudo,
nsFrameItems& aChildItems,
nsIFrame*& aNewCellOuterFrame,
nsIFrame*& aNewCellInnerFrame,
PRBool& aIsPseudoParent)
{
nsresult rv = NS_OK;
if (!aParentFrameIn) return rv;
nsIFrame* parentFrame = aParentFrameIn;
aIsPseudoParent = PR_FALSE;
if (!aIsPseudo) {
// this frame may have a pseudo parent
// use nsLayoutAtoms::tableCellFrame which will match if it is really nsLayoutAtoms::bcTableCellFrame
GetParentFrame(aTableCreator, *aParentFrameIn,
nsLayoutAtoms::tableCellFrame, aState, parentFrame,
aIsPseudoParent);
if (!aIsPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
if (!aIsPseudo && aIsPseudoParent && aState.mPseudoFrames.mCellOuter.mFrame) {
ProcessPseudoFrames(aState, nsLayoutAtoms::tableCellFrame);
}
}
rv = aTableCreator.CreateTableCellFrame(parentFrame, &aNewCellOuterFrame);
if (NS_FAILED(rv)) return rv;
// Initialize the table cell frame
InitAndRestoreFrame(aState, aContent, parentFrame, aStyleContext, nsnull,
aNewCellOuterFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(aNewCellOuterFrame, nsnull, PR_FALSE);
// Create a block frame that will format the cell's content
rv = aTableCreator.CreateTableCellInnerFrame(&aNewCellInnerFrame);
if (NS_FAILED(rv)) {
aNewCellOuterFrame->Destroy(aState.mPresContext);
aNewCellOuterFrame = nsnull;
return rv;
}
// Resolve pseudo style and initialize the body cell frame
nsRefPtr<nsStyleContext> innerPseudoStyle;
innerPseudoStyle = mPresShell->StyleSet()->
ResolvePseudoStyleFor(aContent,
nsCSSAnonBoxes::cellContent, aStyleContext);
InitAndRestoreFrame(aState, aContent, aNewCellOuterFrame, innerPseudoStyle,
nsnull, aNewCellInnerFrame);
if (!aIsPseudo) {
PRBool haveFirstLetterStyle, haveFirstLineStyle;
HaveSpecialBlockStyle(aContent, aStyleContext,
&haveFirstLetterStyle, &haveFirstLineStyle);
// The block frame is a float container
nsFrameConstructorSaveState floatSaveState;
aState.PushFloatContainingBlock(aNewCellInnerFrame, floatSaveState,
haveFirstLetterStyle, haveFirstLineStyle);
// Process the child content
nsFrameItems childItems;
// pass in null tableCreator so ProcessChildren will not call TableProcessChildren
rv = ProcessChildren(aState, aContent, aNewCellInnerFrame,
PR_TRUE, childItems, PR_TRUE, nsnull);
if (NS_FAILED(rv)) {
// Clean up
// XXXbz kids of this stuff need to be cleaned up too!
aNewCellInnerFrame->Destroy(aState.mPresContext);
aNewCellInnerFrame = nsnull;
aNewCellOuterFrame->Destroy(aState.mPresContext);
aNewCellOuterFrame = nsnull;
return rv;
}
aNewCellInnerFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
aNewCellOuterFrame->SetInitialChildList(aState.mPresContext, nsnull,
aNewCellInnerFrame);
if (aIsPseudoParent) {
aState.mPseudoFrames.mRow.mChildList.AddChild(aNewCellOuterFrame);
}
}
return rv;
}
PRBool
nsCSSFrameConstructor::MustGeneratePseudoParent(nsIAtom* aTag,
nsIContent* aContent,
nsStyleContext* aStyleContext)
{
if (!aStyleContext)
return PR_FALSE;
if (NS_STYLE_DISPLAY_NONE == aStyleContext->GetStyleDisplay()->mDisplay)
return PR_FALSE;
// check tags first
if ((nsLayoutAtoms::textTagName == aTag)) {
return !IsOnlyWhitespace(aContent);
}
// exclude tags
if ( nsLayoutAtoms::commentTagName == aTag) {
return PR_FALSE;
}
return PR_TRUE;
}
// this is called when a non table related element is a child of a table, row group,
// or row, but not a cell.
nsresult
nsCSSFrameConstructor::ConstructTableForeignFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrameIn,
nsStyleContext* aStyleContext,
nsTableCreator& aTableCreator,
nsFrameItems& aChildItems)
{
nsresult rv = NS_OK;
if (!aParentFrameIn) return rv;
nsIFrame* parentFrame = nsnull;
PRBool hasPseudoParent = PR_FALSE;
nsIAtom *tag = aContent->Tag();
if (MustGeneratePseudoParent(tag, aContent, aStyleContext)) {
// this frame may have a pseudo parent, use block frame type to
// trigger foreign
rv = GetParentFrame(aTableCreator,
*aParentFrameIn, nsLayoutAtoms::blockFrame,
aState, parentFrame, hasPseudoParent);
NS_ASSERTION(NS_SUCCEEDED(rv), "GetParentFrame failed!");
if (!hasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
}
if (!parentFrame) return rv; // if pseudo frame wasn't created
// there are two situations where table related frames will wrap around
// foreign frames
// a) inner table cell, which is a pseudo frame
// b) caption frame which will be always a real frame.
NS_ASSERTION(nsLayoutAtoms::tableCaptionFrame == parentFrame->GetType() ||
parentFrame == aState.mPseudoFrames.mCellInner.mFrame,
"Weird parent in ConstructTableForeignFrame");
// Push the parent as the floater containing block
nsFrameConstructorSaveState saveState;
aState.PushFloatContainingBlock(parentFrame, saveState, PR_FALSE, PR_FALSE);
// save the pseudo frame state now, as descendants of the child frame may require
// other pseudo frame creations
nsPseudoFrames prevPseudoFrames;
aState.mPseudoFrames.Reset(&prevPseudoFrames);
// Put the frames as kids of either the anonymous block (if we
// created one), or just of our parent.
nsFrameItems& childItems =
hasPseudoParent ? prevPseudoFrames.mCellInner.mChildList : aChildItems;
ConstructFrame(aState, aContent, parentFrame, childItems);
// dont care about return value as ConstructFrame will not append a child if it fails.
// restore the pseudo frame state
aState.mPseudoFrames = prevPseudoFrames;
return rv;
}
static PRBool
NeedFrameFor(nsIFrame* aParentFrame,
nsIContent* aChildContent)
{
// don't create a whitespace frame if aParentFrame doesn't want it
if ((NS_FRAME_EXCLUDE_IGNORABLE_WHITESPACE & aParentFrame->GetStateBits())
&& IsOnlyWhitespace(aChildContent)) {
return PR_FALSE;
}
return PR_TRUE;
}
nsresult
nsCSSFrameConstructor::TableProcessChildren(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsTableCreator& aTableCreator,
nsFrameItems& aChildItems,
nsIFrame*& aCaption)
{
nsresult rv = NS_OK;
if (!aContent || !aParentFrame) return rv;
aCaption = nsnull;
// save the incoming pseudo frame state
nsPseudoFrames priorPseudoFrames;
aState.mPseudoFrames.Reset(&priorPseudoFrames);
nsIAtom* parentFrameType = aParentFrame->GetType();
nsStyleContext* parentStyleContext = aParentFrame->GetStyleContext();
ChildIterator iter, last;
for (ChildIterator::Init(aContent, &iter, &last);
iter != last;
++iter) {
nsCOMPtr<nsIContent> childContent = *iter;
if (childContent &&
(childContent->IsContentOfType(nsIContent::eELEMENT) ||
childContent->IsContentOfType(nsIContent::eTEXT)) &&
NeedFrameFor(aParentFrame, childContent)) {
rv = TableProcessChild(aState, childContent,
aContent, aParentFrame,
parentFrameType, parentStyleContext,
aTableCreator, aChildItems, aCaption);
}
if (NS_FAILED(rv)) return rv;
}
// process the current pseudo frame state
if (!aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
// restore the incoming pseudo frame state
aState.mPseudoFrames = priorPseudoFrames;
return rv;
}
nsresult
nsCSSFrameConstructor::TableProcessChild(nsFrameConstructorState& aState,
nsIContent* aChildContent,
nsIContent* aParentContent,
nsIFrame* aParentFrame,
nsIAtom* aParentFrameType,
nsStyleContext* aParentStyleContext,
nsTableCreator& aTableCreator,
nsFrameItems& aChildItems,
nsIFrame*& aCaption)
{
nsresult rv = NS_OK;
PRBool childIsCaption = PR_FALSE;
PRBool isPseudoParent = PR_FALSE;
nsIFrame* childFrame = nsnull;
nsRefPtr<nsStyleContext> childStyleContext;
// Resolve the style context and get its display
childStyleContext = ResolveStyleContext(aParentFrame, aChildContent);
const nsStyleDisplay* childDisplay = childStyleContext->GetStyleDisplay();
if (nsLayoutAtoms::tableColGroupFrame == aParentFrameType &&
NS_STYLE_DISPLAY_TABLE_COLUMN != childDisplay->mDisplay)
return rv; // construct only table columns below colgroups
switch (childDisplay->mDisplay) {
case NS_STYLE_DISPLAY_TABLE:
{
PRBool pageBreakAfter = PR_FALSE;
if (aState.mPresContext->IsPaginated()) {
// See if there is a page break before, if so construct one. Also see if there is one after
pageBreakAfter = PageBreakBefore(aState, aChildContent, aParentFrame,
childStyleContext, aChildItems);
}
// construct the table frame
nsIFrame* innerTableFrame;
rv = ConstructTableFrame(aState, aChildContent,
aParentFrame, childStyleContext,
aTableCreator, PR_FALSE, aChildItems,
childFrame, innerTableFrame);
if (NS_SUCCEEDED(rv) && pageBreakAfter) {
// Construct the page break after
ConstructPageBreakFrame(aState, aChildContent, aParentFrame,
childStyleContext, aChildItems);
}
}
// All done here
return rv;
case NS_STYLE_DISPLAY_TABLE_CAPTION:
if (!aCaption) { // only allow one caption
nsIFrame* parentFrame = GetOuterTableFrame(aParentFrame);
rv = ConstructTableCaptionFrame(aState, aChildContent, parentFrame,
childStyleContext, aTableCreator,
aChildItems, aCaption, isPseudoParent);
}
childIsCaption = PR_TRUE;
break;
case NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP:
rv = ConstructTableColGroupFrame(aState, aChildContent, aParentFrame,
childStyleContext, aTableCreator,
PR_FALSE, aChildItems, childFrame,
isPseudoParent);
break;
case NS_STYLE_DISPLAY_TABLE_HEADER_GROUP:
case NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP:
case NS_STYLE_DISPLAY_TABLE_ROW_GROUP:
rv = ConstructTableRowGroupFrame(aState, aChildContent, aParentFrame,
childStyleContext, aTableCreator,
PR_FALSE, aChildItems, childFrame,
isPseudoParent);
break;
case NS_STYLE_DISPLAY_TABLE_ROW:
rv = ConstructTableRowFrame(aState, aChildContent, aParentFrame,
childStyleContext, aTableCreator,
PR_FALSE, aChildItems, childFrame,
isPseudoParent);
break;
case NS_STYLE_DISPLAY_TABLE_COLUMN:
rv = ConstructTableColFrame(aState, aChildContent, aParentFrame,
childStyleContext, aTableCreator,
PR_FALSE, aChildItems, childFrame,
isPseudoParent);
break;
case NS_STYLE_DISPLAY_TABLE_CELL:
nsIFrame* innerCell;
rv = ConstructTableCellFrame(aState, aChildContent, aParentFrame,
childStyleContext, aTableCreator, PR_FALSE,
aChildItems, childFrame, innerCell,
isPseudoParent);
break;
case NS_STYLE_DISPLAY_NONE:
aState.mFrameManager->SetUndisplayedContent(aChildContent,
childStyleContext);
break;
default:
{
// if <form>'s parent is <tr>/<table>/<tbody>/<thead>/<tfoot> in html,
// NOT create pseudoframe for it.
// see bug 159359
nsINodeInfo *childNodeInfo = aChildContent->GetNodeInfo();
// Sometimes aChildContent is a #text node. In those cases it
// does not have a nodeinfo, and in those cases we want to
// construct a foreign frame for it in any case. So we can just
// null-check the nodeinfo here.
NS_ASSERTION(childNodeInfo ||
aChildContent->IsContentOfType(nsIContent::eTEXT),
"Non-#text nodes should have a nodeinfo here!");
if (aChildContent->IsContentOfType(nsIContent::eHTML) &&
childNodeInfo->Equals(nsHTMLAtoms::form, kNameSpaceID_None) &&
aParentContent->IsContentOfType(nsIContent::eHTML)) {
nsINodeInfo *parentNodeInfo = aParentContent->GetNodeInfo();
if (parentNodeInfo->Equals(nsHTMLAtoms::table) ||
parentNodeInfo->Equals(nsHTMLAtoms::tr) ||
parentNodeInfo->Equals(nsHTMLAtoms::tbody) ||
parentNodeInfo->Equals(nsHTMLAtoms::thead) ||
parentNodeInfo->Equals(nsHTMLAtoms::tfoot)) {
break;
}
}
// ConstructTableForeignFrame puts the frame in the right child list and all that
return ConstructTableForeignFrame(aState, aChildContent, aParentFrame,
childStyleContext, aTableCreator,
aChildItems);
}
}
// for every table related frame except captions and ones with pseudo parents,
// link into the child list
if (childFrame && !childIsCaption && !isPseudoParent) {
aChildItems.AddChild(childFrame);
}
return rv;
}
const nsStyleDisplay*
nsCSSFrameConstructor::GetDisplay(nsIFrame* aFrame)
{
if (nsnull == aFrame) {
return nsnull;
}
return aFrame->GetStyleContext()->GetStyleDisplay();
}
/***********************************************
* END TABLE SECTION
***********************************************/
nsresult
nsCSSFrameConstructor::ConstructDocElementTableFrame(nsIContent* aDocElement,
nsIFrame* aParentFrame,
nsIFrame** aNewTableFrame,
nsFrameConstructorState& aState)
{
nsFrameItems frameItems;
// XXXbz this is wrong. We should at least be setting the fixed container in
// the framestate here. Better yet, we should pass through aState
// unmodified. Can't do that, though, because then a fixed or absolute
// positioned root table with auto offsets would look for a block to compute
// its hypothetical box and crash. So we just disable fixed positioning
// altogether in documents where the root is a table. Oh, well.
nsFrameConstructorState state(mPresShell, nsnull, nsnull, nsnull,
aState.mFrameState);
ConstructFrame(state, aDocElement, aParentFrame, frameItems);
*aNewTableFrame = frameItems.childList;
if (!*aNewTableFrame) {
NS_WARNING("cannot get table contentFrame");
// XXXbz maybe better to return the error from ConstructFrame?
return NS_ERROR_FAILURE;
}
return NS_OK;
}
static PRBool CheckOverflow(nsPresContext* aPresContext,
const nsStyleDisplay* aDisplay)
{
if (aDisplay->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE)
return PR_FALSE;
if (aDisplay->mOverflowX == NS_STYLE_OVERFLOW_CLIP)
aPresContext->SetViewportOverflowOverride(NS_STYLE_OVERFLOW_HIDDEN,
NS_STYLE_OVERFLOW_HIDDEN);
else
aPresContext->SetViewportOverflowOverride(aDisplay->mOverflowX,
aDisplay->mOverflowY);
return PR_TRUE;
}
/**
* This checks the root element and the HTML BODY, if any, for an "overflow" property
* that should be applied to the viewport. If one is found then we return the
* element that we took the overflow from (which should then be treated as
* "overflow:visible"), and we store the overflow style in the prescontext.
* @return if scroll was propagated from some content node, the content node it
* was propagated from.
*/
nsIContent*
nsCSSFrameConstructor::PropagateScrollToViewport()
{
// Set default
nsPresContext* presContext = mPresShell->GetPresContext();
presContext->SetViewportOverflowOverride(NS_STYLE_OVERFLOW_AUTO,
NS_STYLE_OVERFLOW_AUTO);
// We never mess with the viewport scroll state
// when printing or in print preview
if (presContext->IsPaginated()) {
return nsnull;
}
nsIContent* docElement = mDocument->GetRootContent();
// Check the style on the document root element
nsStyleSet *styleSet = mPresShell->StyleSet();
nsRefPtr<nsStyleContext> rootStyle;
rootStyle = styleSet->ResolveStyleFor(docElement, nsnull);
if (!rootStyle) {
return nsnull;
}
if (CheckOverflow(presContext, rootStyle->GetStyleDisplay())) {
// tell caller we stole the overflow style from the root element
return docElement;
}
// Don't look in the BODY for non-HTML documents or HTML documents
// with non-HTML roots
// XXX this should be earlier; we shouldn't even look at the document root
// for non-HTML documents. Fix this once we support explicit CSS styling
// of the viewport
// XXX what about XHTML?
nsCOMPtr<nsIDOMHTMLDocument> htmlDoc(do_QueryInterface(mDocument));
if (!htmlDoc || !docElement->IsContentOfType(nsIContent::eHTML)) {
return nsnull;
}
nsCOMPtr<nsIDOMHTMLElement> body;
htmlDoc->GetBody(getter_AddRefs(body));
nsCOMPtr<nsIContent> bodyElement = do_QueryInterface(body);
if (!bodyElement ||
!bodyElement->GetNodeInfo()->Equals(nsHTMLAtoms::body)) {
// The body is not a <body> tag, it's a <frameset>.
return nsnull;
}
nsRefPtr<nsStyleContext> bodyStyle;
bodyStyle = styleSet->ResolveStyleFor(bodyElement, rootStyle);
if (!bodyStyle) {
return nsnull;
}
if (CheckOverflow(presContext, bodyStyle->GetStyleDisplay())) {
// tell caller we stole the overflow style from the body element
return bodyElement;
}
return nsnull;
}
/**
* New one
*/
nsresult
nsCSSFrameConstructor::ConstructDocElementFrame(nsFrameConstructorState& aState,
nsIContent* aDocElement,
nsIFrame* aParentFrame,
nsIFrame** aNewFrame)
{
// how the root frame hierarchy should look
/*
---------------No Scrollbars------
AreaFrame or BoxFrame (InitialContainingBlock)
---------------Gfx Scrollbars ------
ScrollFrame
^
|
ScrollBox
^
|
AreaFrame or BoxFrame (InitialContainingBlock)
*/
*aNewFrame = nsnull;
if (!mTempFrameTreeState)
aState.mPresShell->CaptureHistoryState(getter_AddRefs(mTempFrameTreeState));
// ----- reattach gfx scrollbars ------
// Gfx scrollframes were created in the root frame but the primary frame map may have been destroyed if a
// new style sheet was loaded so lets reattach the frames to their content.
if (mGfxScrollFrame) {
nsIFrame* scrollBox = mGfxScrollFrame->GetFirstChild(nsnull);
nsIFrame* gfxScrollbarFrame1 = nsnull;
nsIFrame* gfxScrollbarFrame2 = nsnull;
gfxScrollbarFrame1 = scrollBox->GetNextSibling();
if (gfxScrollbarFrame1) {
// XXX This works, but why?
aState.mFrameManager->
SetPrimaryFrameFor(gfxScrollbarFrame1->GetContent(), gfxScrollbarFrame1);
gfxScrollbarFrame2 = gfxScrollbarFrame1->GetNextSibling();
if (gfxScrollbarFrame2) {
// XXX This works, but why?
aState.mFrameManager->
SetPrimaryFrameFor(gfxScrollbarFrame2->GetContent(), gfxScrollbarFrame2);
}
}
}
// --------- CREATE AREA OR BOX FRAME -------
nsRefPtr<nsStyleContext> styleContext;
styleContext = mPresShell->StyleSet()->ResolveStyleFor(aDocElement,
nsnull);
const nsStyleDisplay* display = styleContext->GetStyleDisplay();
// Ensure that our XBL bindings are installed.
if (display->mBinding) {
// Get the XBL loader.
nsresult rv;
PRBool resolveStyle;
nsIXBLService * xblService = GetXBLService();
if (!xblService)
return NS_ERROR_FAILURE;
nsRefPtr<nsXBLBinding> binding;
rv = xblService->LoadBindings(aDocElement, display->mBinding, PR_FALSE,
getter_AddRefs(binding), &resolveStyle);
if (NS_FAILED(rv))
return NS_OK; // Binding will load asynchronously.
if (binding) {
mDocument->BindingManager()->AddToAttachedQueue(binding);
}
if (resolveStyle) {
styleContext = mPresShell->StyleSet()->ResolveStyleFor(aDocElement,
nsnull);
display = styleContext->GetStyleDisplay();
}
}
// --------- IF SCROLLABLE WRAP IN SCROLLFRAME --------
PRBool propagatedScrollToViewport =
PropagateScrollToViewport() == aDocElement;
// The document root should not be scrollable in any paginated context,
// even in print preview.
PRBool isScrollable = display->IsScrollableOverflow()
&& !aState.mPresContext->IsPaginated()
&& !propagatedScrollToViewport;
nsIFrame* scrollFrame = nsnull;
// build a scrollframe
if (isScrollable) {
nsIFrame* newScrollFrame = nsnull;
nsRefPtr<nsStyleContext> newContext;
newContext = BeginBuildingScrollFrame( aState,
aDocElement,
styleContext,
aParentFrame,
nsnull,
nsCSSAnonBoxes::scrolledContent,
PR_FALSE,
scrollFrame,
newScrollFrame);
styleContext = newContext;
aParentFrame = newScrollFrame;
}
nsIFrame* contentFrame = nsnull;
PRBool isBlockFrame = PR_FALSE;
nsresult rv;
// The rules from CSS 2.1, section 9.2.4, have already been applied
// by the style system, so we can assume that display->mDisplay is
// either NONE, BLOCK, or TABLE.
PRBool docElemIsTable = display->mDisplay == NS_STYLE_DISPLAY_TABLE;
if (docElemIsTable) {
// if the document is a table then just populate it.
rv = ConstructDocElementTableFrame(aDocElement, aParentFrame, &contentFrame,
aState);
if (NS_FAILED(rv)) {
return rv;
}
styleContext = contentFrame->GetStyleContext();
} else {
// otherwise build a box or a block
#ifdef MOZ_XUL
if (aDocElement->IsContentOfType(nsIContent::eXUL)) {
rv = NS_NewDocElementBoxFrame(mPresShell, &contentFrame);
if (NS_FAILED(rv)) {
return rv;
}
}
else
#endif
#ifdef MOZ_SVG
if (aDocElement->GetNameSpaceID() == kNameSpaceID_SVG && SVGEnabled()) {
rv = NS_NewSVGOuterSVGFrame(mPresShell, aDocElement, &contentFrame);
if (NS_FAILED(rv)) {
return rv;
}
isBlockFrame = PR_TRUE;
}
else
#endif
{
rv = NS_NewDocumentElementFrame(mPresShell, &contentFrame);
if (NS_FAILED(rv)) {
return rv;
}
isBlockFrame = PR_TRUE;
}
// initialize the child
InitAndRestoreFrame(aState, aDocElement, aParentFrame, styleContext,
nsnull, contentFrame);
}
// set the primary frame
aState.mFrameManager->SetPrimaryFrameFor(aDocElement, contentFrame);
// Finish building the scrollframe
if (isScrollable) {
FinishBuildingScrollFrame(aParentFrame, contentFrame);
// primary is set above (to the contentFrame)
*aNewFrame = scrollFrame;
} else {
// if not scrollable the new frame is the content frame.
*aNewFrame = contentFrame;
}
mInitialContainingBlock = contentFrame;
// if it was a table then we don't need to process our children.
if (!docElemIsTable) {
// Process the child content
nsFrameConstructorSaveState absoluteSaveState;
nsFrameConstructorSaveState floatSaveState;
nsFrameItems childItems;
if (isBlockFrame) {
PRBool haveFirstLetterStyle, haveFirstLineStyle;
HaveSpecialBlockStyle(aDocElement, styleContext,
&haveFirstLetterStyle, &haveFirstLineStyle);
aState.PushAbsoluteContainingBlock(contentFrame, absoluteSaveState);
aState.PushFloatContainingBlock(contentFrame, floatSaveState,
haveFirstLetterStyle,
haveFirstLineStyle);
}
// Create any anonymous frames the doc element frame requires
// This must happen before ProcessChildren to ensure that popups are
// never constructed before the popupset.
CreateAnonymousFrames(nsnull, aState, aDocElement, contentFrame,
PR_FALSE, childItems, PR_TRUE);
ProcessChildren(aState, aDocElement, contentFrame, PR_TRUE, childItems,
isBlockFrame);
// Set the initial child lists
contentFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
}
return NS_OK;
}
nsresult
nsCSSFrameConstructor::ConstructRootFrame(nsIContent* aDocElement,
nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null out param");
// how the root frame hierarchy should look
// XXXbz if you change this method, change
// PresShell::GetPageSequenceFrame accordingly!
/*
---------------No Scrollbars------
ViewPortFrame (FixedContainingBlock) <---- RootView
^
|
RootFrame(DocElementContainingBlock)
---------------Gfx Scrollbars ------
ViewPortFrame (FixedContainingBlock) <---- RootView
^
|
ScrollFrame
^
|
ScrollBox <--- RootScrollableView
^
|
RootFrame(DocElementContainingBlock)
*/
// Set up our style rule observer.
{
nsCOMPtr<nsIStyleRuleSupplier> ruleSupplier =
do_QueryInterface(mDocument->BindingManager());
mPresShell->StyleSet()->SetStyleRuleSupplier(ruleSupplier);
}
// --------- BUILD VIEWPORT -----------
nsIFrame* viewportFrame = nsnull;
nsRefPtr<nsStyleContext> viewportPseudoStyle;
nsStyleSet *styleSet = mPresShell->StyleSet();
viewportPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull,
nsCSSAnonBoxes::viewport,
nsnull);
NS_NewViewportFrame(mPresShell, &viewportFrame);
nsPresContext* presContext = mPresShell->GetPresContext();
// XXXbz do we _have_ to pass a null content pointer to that frame?
// Would it really kill us to pass in the root element or something?
// What would that break?
viewportFrame->Init(presContext, nsnull, nsnull,
viewportPseudoStyle, nsnull);
// Bind the viewport frame to the root view
nsIViewManager* viewManager = mPresShell->GetViewManager();
nsIView* rootView;
viewManager->GetRootView(rootView);
viewportFrame->SetView(rootView);
nsContainerFrame::SyncFrameViewProperties(presContext, viewportFrame,
viewportPseudoStyle, rootView);
// The viewport is the containing block for 'fixed' elements
mFixedContainingBlock = viewportFrame;
// --------- CREATE ROOT FRAME -------
// Create the root frame. The document element's frame is a child of the
// root frame.
//
// The root frame serves two purposes:
// - reserves space for any margins needed for the document element's frame
// - renders the document element's background. This ensures the background covers
// the entire canvas as specified by the CSS2 spec
PRBool isPaginated = presContext->IsPaginated();
PRBool isPrintPreview =
presContext->Type() == nsPresContext::eContext_PrintPreview;
nsIFrame* rootFrame = nsnull;
nsIAtom* rootPseudo;
if (!isPaginated) {
#ifdef MOZ_XUL
if (aDocElement->IsContentOfType(nsIContent::eXUL))
{
NS_NewRootBoxFrame(mPresShell, &rootFrame);
} else
#endif
{
NS_NewCanvasFrame(mPresShell, &rootFrame);
}
rootPseudo = nsCSSAnonBoxes::canvas;
mDocElementContainingBlock = rootFrame;
} else {
// Create a page sequence frame
NS_NewSimplePageSequenceFrame(mPresShell, &rootFrame);
rootPseudo = nsCSSAnonBoxes::pageSequence;
}
// --------- IF SCROLLABLE WRAP IN SCROLLFRAME --------
// If the device supports scrolling (e.g., in galley mode on the screen and
// for print-preview, but not when printing), then create a scroll frame that
// will act as the scrolling mechanism for the viewport.
// XXX Do we even need a viewport when printing to a printer?
//isScrollable = PR_FALSE;
// As long as the webshell doesn't prohibit it, and the device supports
// it, create a scroll frame that will act as the scolling mechanism for
// the viewport.
//
// Threre are three possible values stored in the docshell:
// 1) nsIScrollable::Scrollbar_Never = no scrollbars
// 2) nsIScrollable::Scrollbar_Auto = scrollbars appear if needed
// 3) nsIScrollable::Scrollbar_Always = scrollbars always
// Only need to create a scroll frame/view for cases 2 and 3.
PRBool isHTML = aDocElement->IsContentOfType(nsIContent::eHTML);
PRBool isXUL = PR_FALSE;
if (!isHTML) {
isXUL = aDocElement->IsContentOfType(nsIContent::eXUL);
}
// Never create scrollbars for XUL documents
PRBool isScrollable = !isXUL;
// Never create scrollbars for frameset documents.
if (isHTML) {
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(mDocument);
if (htmlDoc && htmlDoc->GetIsFrameset())
isScrollable = PR_FALSE;
}
// Don't create a scrollframe when we're inside a frame or iframe with
// scrolling="no". This makes the frame hierarchy inconsistent and is
// unnecessary for correctness (since
// nsGfxScrollFrameInner::GetScrollbarStyles handles all the necessary
// cases), but it seems to be needed for performance.
if (isScrollable) {
nsresult rv;
if (presContext) {
nsCOMPtr<nsISupports> container = presContext->GetContainer();
if (container) {
nsCOMPtr<nsIScrollable> scrollableContainer = do_QueryInterface(container, &rv);
if (NS_SUCCEEDED(rv) && scrollableContainer) {
PRInt32 scrolling = -1;
scrollableContainer->GetDefaultScrollbarPreferences(nsIScrollable::ScrollOrientation_Y,&scrolling);
if (nsIScrollable::Scrollbar_Never == scrolling) {
scrollableContainer->GetDefaultScrollbarPreferences(nsIScrollable::ScrollOrientation_X,&scrolling);
if (nsIScrollable::Scrollbar_Never == scrolling) {
isScrollable = PR_FALSE;
}
}
}
}
}
}
if (isPaginated) {
if (isPrintPreview) {
isScrollable = presContext->HasPaginatedScrolling();
} else {
isScrollable = PR_FALSE; // we are printing
}
}
// We no longer need to do overflow propagation here. It's taken care of
// when we construct frames for the element whose overflow might be
// propagated
NS_ASSERTION(!isScrollable || !isXUL,
"XUL documents should never be scrollable - see above");
nsIFrame* newFrame = rootFrame;
nsRefPtr<nsStyleContext> rootPseudoStyle;
// we must create a state because if the scrollbars are GFX it needs the
// state to build the scrollbar frames.
nsFrameConstructorState state(mPresShell, nsnull, nsnull, nsnull);
nsIFrame* parentFrame = viewportFrame;
// If paginated, make sure we don't put scrollbars in
if (isPaginated && !isPrintPreview)
rootPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull,
rootPseudo,
viewportPseudoStyle);
else if (isScrollable) {
// Build the frame. We give it the content we are wrapping which is the document,
// the root frame, the parent view port frame, and we should get back the new
// frame and the scrollable view if one was created.
// resolve a context for the scrollframe
nsRefPtr<nsStyleContext> styleContext;
styleContext = styleSet->ResolvePseudoStyleFor(nsnull,
nsCSSAnonBoxes::viewportScroll,
viewportPseudoStyle);
// Note that the viewport scrollframe is always built with
// overflow:auto style. This forces the scroll frame to create
// anonymous content for both scrollbars. This is necessary even
// if the HTML or BODY elements are overriding the viewport
// scroll style to 'hidden' --- dynamic style changes might put
// scrollbars back on the viewport and we don't want to have to
// reframe the viewport to create the scrollbar content.
nsIFrame* newScrollableFrame = nsnull;
newFrame = nsnull;
rootPseudoStyle = BeginBuildingScrollFrame( state,
aDocElement,
styleContext,
viewportFrame,
nsnull,
rootPseudo,
PR_TRUE,
newFrame,
newScrollableFrame);
// Inform the view manager about the root scrollable view
nsIView* view = newScrollableFrame->GetView();
NS_ENSURE_TRUE(view, NS_ERROR_FAILURE);
nsIScrollableView* scrollableView = view->ToScrollableView();
NS_ENSURE_TRUE(scrollableView, NS_ERROR_FAILURE);
viewManager->SetRootScrollableView(scrollableView);
parentFrame = newScrollableFrame;
mGfxScrollFrame = newFrame;
} else {
// If no scrollbars and xul, don't build a scrollframe at all.
if (isXUL) {
rootPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull,
rootPseudo,
viewportPseudoStyle);
} else {
// if HTML the always create a scrollframe so anchors work. That way you can scroll to
// anchors even if we don't have scrollbars.
// create a style context for the scrollport of the viewport
nsRefPtr<nsStyleContext> scrollPseudoStyle;
scrollPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull,
nsCSSAnonBoxes::scrolledContent,
viewportPseudoStyle);
// create scrollframe
nsIFrame* scrollFrame = nsnull;
NS_NewScrollBoxFrame(mPresShell, &scrollFrame);
NS_ENSURE_TRUE(scrollFrame, NS_ERROR_FAILURE);
scrollFrame->Init(presContext, nsnull, parentFrame, scrollPseudoStyle, nsnull);
// resolve a new style for the root frame
rootPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull,
rootPseudo,
scrollPseudoStyle);
// Inform the view manager about the root scrollable view
nsIView* view = scrollFrame->GetView();
NS_ENSURE_TRUE(view, NS_ERROR_FAILURE);
nsIScrollableView* scrollableView = view->ToScrollableView();
NS_ENSURE_TRUE(scrollableView, NS_ERROR_FAILURE);
viewManager->SetRootScrollableView(scrollableView);
parentFrame = scrollFrame;
newFrame = scrollFrame;
}
}
rootFrame->Init(presContext, aDocElement, parentFrame,
rootPseudoStyle, nsnull);
if (!isPaginated || isPrintPreview) {
if (isScrollable) {
FinishBuildingScrollFrame(parentFrame, rootFrame);
// Don't set the root as the primary frame for aDocElement. Its
// primary frame will be set in ConstructDocElementFrame.
} else { // if not scrollable
if (!isXUL) { // if not XUL
parentFrame->SetInitialChildList(presContext, nsnull, rootFrame);
}
}
}
if (isPaginated) { // paginated
// Create the first page
// Set the initial child lists
nsIFrame *pageFrame, *pageContentFrame;
ConstructPageFrame(mPresShell, presContext, rootFrame, nsnull,
pageFrame, pageContentFrame);
rootFrame->SetInitialChildList(presContext, nsnull, pageFrame);
// The eventual parent of the document element frame.
// XXX should this be set for every new page (in ConstructPageFrame)?
mDocElementContainingBlock = pageContentFrame;
}
viewportFrame->SetInitialChildList(presContext, nsnull, newFrame);
*aNewFrame = viewportFrame;
return NS_OK;
}
nsresult
nsCSSFrameConstructor::ConstructPageFrame(nsIPresShell* aPresShell,
nsPresContext* aPresContext,
nsIFrame* aParentFrame,
nsIFrame* aPrevPageFrame,
nsIFrame*& aPageFrame,
nsIFrame*& aPageContentFrame)
{
nsresult rv = NS_OK;
rv = NS_NewPageFrame(aPresShell, &aPageFrame);
if (NS_FAILED(rv))
return rv;
nsStyleContext* parentStyleContext = aParentFrame->GetStyleContext();
nsStyleSet *styleSet = aPresShell->StyleSet();
nsRefPtr<nsStyleContext> pagePseudoStyle;
pagePseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull,
nsCSSAnonBoxes::page,
parentStyleContext);
// Initialize the page frame and force it to have a view. This makes printing of
// the pages easier and faster.
aPageFrame->Init(aPresContext, nsnull, aParentFrame, pagePseudoStyle, aPrevPageFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
rv = nsHTMLContainerFrame::CreateViewForFrame(aPageFrame, nsnull, PR_TRUE);
if (NS_FAILED(rv))
return NS_ERROR_NULL_POINTER;
NS_NewPageContentFrame(aPresShell, &aPageContentFrame);
nsRefPtr<nsStyleContext> pageContentPseudoStyle;
pageContentPseudoStyle = styleSet->ResolvePseudoStyleFor(nsnull,
nsCSSAnonBoxes::pageContent,
pagePseudoStyle);
// Initialize the page content frame and force it to have a view. Also make it the
// containing block for fixed elements which are repeated on every page.
aPageContentFrame->Init(aPresContext, nsnull, aPageFrame, pageContentPseudoStyle, nsnull);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(aPageContentFrame, nsnull, PR_TRUE);
if (NS_FAILED(rv))
return NS_ERROR_NULL_POINTER;
mFixedContainingBlock = aPageContentFrame;
aPageFrame->SetInitialChildList(aPresContext, nsnull, aPageContentFrame);
// Fixed pos kids are taken care of directly in CreateContinuingFrame()
return rv;
}
/* static */
nsresult
nsCSSFrameConstructor::CreatePlaceholderFrameFor(nsIPresShell* aPresShell,
nsPresContext* aPresContext,
nsFrameManager* aFrameManager,
nsIContent* aContent,
nsIFrame* aFrame,
nsStyleContext* aStyleContext,
nsIFrame* aParentFrame,
nsIFrame** aPlaceholderFrame)
{
nsPlaceholderFrame* placeholderFrame;
nsresult rv = NS_NewPlaceholderFrame(aPresShell, (nsIFrame**)&placeholderFrame);
if (NS_SUCCEEDED(rv)) {
// The placeholder frame gets a pseudo style context
nsRefPtr<nsStyleContext> placeholderStyle;
nsStyleContext* parentContext = aStyleContext->GetParent();
placeholderStyle = aPresShell->StyleSet()->
ResolveStyleForNonElement(parentContext);
placeholderFrame->Init(aPresContext, aContent, aParentFrame,
placeholderStyle, nsnull);
// The placeholder frame has a pointer back to the out-of-flow frame
placeholderFrame->SetOutOfFlowFrame(aFrame);
aFrame->AddStateBits(NS_FRAME_OUT_OF_FLOW);
// Add mapping from absolutely positioned frame to its placeholder frame
aFrameManager->RegisterPlaceholderFrame(placeholderFrame);
*aPlaceholderFrame = NS_STATIC_CAST(nsIFrame*, placeholderFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructRadioControlFrame(nsIFrame** aNewFrame,
nsIContent* aContent,
nsStyleContext* aStyleContext)
{
nsresult rv = NS_NewGfxRadioControlFrame(mPresShell, aNewFrame);
if (NS_FAILED(rv)) {
*aNewFrame = nsnull;
return rv;
}
nsRefPtr<nsStyleContext> radioStyle;
radioStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(aContent,
nsCSSAnonBoxes::radio,
aStyleContext);
nsIRadioControlFrame* radio = nsnull;
if (*aNewFrame && NS_SUCCEEDED(CallQueryInterface(*aNewFrame, &radio))) {
radio->SetRadioButtonFaceStyleContext(radioStyle);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructCheckboxControlFrame(nsIFrame** aNewFrame,
nsIContent* aContent,
nsStyleContext* aStyleContext)
{
nsresult rv = NS_NewGfxCheckboxControlFrame(mPresShell, aNewFrame);
if (NS_FAILED(rv)) {
*aNewFrame = nsnull;
return rv;
}
nsRefPtr<nsStyleContext> checkboxStyle;
checkboxStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(aContent,
nsCSSAnonBoxes::check,
aStyleContext);
nsICheckboxControlFrame* checkbox = nsnull;
if (*aNewFrame && NS_SUCCEEDED(CallQueryInterface(*aNewFrame, &checkbox))) {
checkbox->SetCheckboxFaceStyleContext(checkboxStyle);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructSelectFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
nsStyleContext* aStyleContext,
nsIFrame*& aNewFrame,
const nsStyleDisplay* aStyleDisplay,
PRBool& aFrameHasBeenInitialized,
nsFrameItems& aFrameItems)
{
nsresult rv = NS_OK;
const PRInt32 kNoSizeSpecified = -1;
// Construct a frame-based listbox or combobox
nsCOMPtr<nsIDOMHTMLSelectElement> sel(do_QueryInterface(aContent));
PRInt32 size = 1;
if (sel) {
sel->GetSize(&size);
PRBool multipleSelect = PR_FALSE;
sel->GetMultiple(&multipleSelect);
// Construct a combobox if size=1 or no size is specified and its multiple select
if (((1 == size || 0 == size) || (kNoSizeSpecified == size)) && (PR_FALSE == multipleSelect)) {
// Construct a frame-based combo box.
// The frame-based combo box is built out of three parts. A display area, a button and
// a dropdown list. The display area and button are created through anonymous content.
// The drop-down list's frame is created explicitly. The combobox frame shares it's content
// with the drop-down list.
PRUint32 flags = NS_BLOCK_SHRINK_WRAP | NS_BLOCK_SPACE_MGR;
nsIFrame * comboboxFrame;
rv = NS_NewComboboxControlFrame(mPresShell, &comboboxFrame, flags);
// Save the history state so we don't restore during construction
// since the complete tree is required before we restore.
nsILayoutHistoryState *historyState = aState.mFrameState;
aState.mFrameState = nsnull;
// Initialize the combobox frame
InitAndRestoreFrame(aState, aContent,
aState.GetGeometricParent(aStyleDisplay, aParentFrame),
aStyleContext, nsnull, comboboxFrame);
nsHTMLContainerFrame::CreateViewForFrame(comboboxFrame, aParentFrame, PR_FALSE);
rv = aState.AddChild(comboboxFrame, aFrameItems, aStyleDisplay,
aContent, aStyleContext, aParentFrame);
if (NS_FAILED(rv)) {
return rv;
}
///////////////////////////////////////////////////////////////////
// Combobox - Old Native Implementation
///////////////////////////////////////////////////////////////////
nsIComboboxControlFrame* comboBox = nsnull;
CallQueryInterface(comboboxFrame, &comboBox);
NS_ASSERTION(comboBox, "NS_NewComboboxControlFrame returned frame that "
"doesn't implement nsIComboboxControlFrame");
// Create a listbox
nsIFrame * listFrame;
rv = NS_NewListControlFrame(mPresShell, &listFrame);
// Notify the listbox that it is being used as a dropdown list.
nsIListControlFrame * listControlFrame;
rv = CallQueryInterface(listFrame, &listControlFrame);
if (NS_SUCCEEDED(rv)) {
listControlFrame->SetComboboxFrame(comboboxFrame);
}
// Notify combobox that it should use the listbox as it's popup
comboBox->SetDropDown(listFrame);
// Resolve pseudo element style for the dropdown list
nsRefPtr<nsStyleContext> listStyle;
listStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(aContent,
nsCSSAnonBoxes::dropDownList,
aStyleContext);
NS_ASSERTION(!listStyle->GetStyleDisplay()->IsPositioned(),
"Ended up with positioned dropdown list somehow.");
NS_ASSERTION(!listStyle->GetStyleDisplay()->IsFloating(),
"Ended up with floating dropdown list somehow.");
// Initialize the scroll frame positioned. Note that it is NOT
// initialized as absolutely positioned.
nsIFrame* newFrame = nsnull;
nsIFrame* scrolledFrame = nsnull;
NS_NewSelectsAreaFrame(mPresShell, &scrolledFrame, flags);
// make sure any existing anonymous content is cleared out. Gfx scroll frame construction
// should reset it to just be the anonymous scrollbars, but we don't want to depend
// on that.
mPresShell->SetAnonymousContentFor(aContent, nsnull);
InitializeSelectFrame(aState, listFrame,
scrolledFrame, aContent, comboboxFrame,
listStyle, PR_TRUE, aFrameItems);
newFrame = listFrame;
// Set flag so the events go to the listFrame not child frames.
// XXX: We should replace this with a real widget manager similar
// to how the nsFormControlFrame works. Re-directing events is a temporary Kludge.
NS_ASSERTION(listFrame->GetView(), "ListFrame's view is nsnull");
//listFrame->GetView()->SetViewFlags(NS_VIEW_PUBLIC_FLAG_DONT_CHECK_CHILDREN);
// Create display and button frames from the combobox's anonymous content.
// The anonymous content is appended to existing anonymous content for this
// element (the scrollbars).
nsFrameItems childItems;
CreateAnonymousFrames(nsHTMLAtoms::combobox, aState, aContent,
comboboxFrame, PR_TRUE, childItems);
comboboxFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
// Initialize the additional popup child list which contains the
// dropdown list frame.
nsFrameItems popupItems;
popupItems.AddChild(listFrame);
comboboxFrame->SetInitialChildList(aState.mPresContext,
nsLayoutAtoms::popupList,
popupItems.childList);
aNewFrame = comboboxFrame;
aFrameHasBeenInitialized = PR_TRUE;
aState.mFrameState = historyState;
if (aState.mFrameState && aState.mFrameManager) {
// Restore frame state for the entire subtree of |comboboxFrame|.
aState.mFrameManager->RestoreFrameState(comboboxFrame,
aState.mFrameState);
}
} else {
///////////////////////////////////////////////////////////////////
// ListBox - Old Native Implementation
///////////////////////////////////////////////////////////////////
nsIFrame * listFrame;
rv = NS_NewListControlFrame(mPresShell, &listFrame);
PRUint32 flags = NS_BLOCK_SHRINK_WRAP | NS_BLOCK_SPACE_MGR;
nsIFrame* scrolledFrame = nsnull;
NS_NewSelectsAreaFrame(mPresShell, &scrolledFrame, flags);
// ******* this code stolen from Initialze ScrollFrame ********
// please adjust this code to use BuildScrollFrame.
InitializeSelectFrame(aState, listFrame,
scrolledFrame, aContent, aParentFrame,
aStyleContext, PR_FALSE, aFrameItems);
aNewFrame = listFrame;
aFrameHasBeenInitialized = PR_TRUE;
}
}
return rv;
}
/**
* Used to be InitializeScrollFrame but now its only used for the select tag
* But the select tag should really be fixed to use GFX scrollbars that can
* be create with BuildScrollFrame.
*/
nsresult
nsCSSFrameConstructor::InitializeSelectFrame(nsFrameConstructorState& aState,
nsIFrame* scrollFrame,
nsIFrame* scrolledFrame,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsStyleContext* aStyleContext,
PRBool aBuildCombobox,
nsFrameItems& aFrameItems)
{
const nsStyleDisplay* display = aStyleContext->GetStyleDisplay();
// Initialize it
nsIFrame* geometricParent = aState.GetGeometricParent(display, aParentFrame);
// We don't call InitAndRestoreFrame for scrollFrame because we can only
// restore the frame state after its parts have been created (in particular,
// the scrollable view). So we have to split Init and Restore.
// Initialize the frame
scrollFrame->Init(aState.mPresContext, aContent, geometricParent,
aStyleContext, nsnull);
if (!aBuildCombobox) {
nsresult rv = aState.AddChild(scrollFrame, aFrameItems, display,
aContent, aStyleContext, aParentFrame);
if (NS_FAILED(rv)) {
return rv;
}
}
nsHTMLContainerFrame::CreateViewForFrame(scrollFrame, aParentFrame,
aBuildCombobox);
if (aBuildCombobox) {
// Give the drop-down list a popup widget
nsIView* view = scrollFrame->GetView();
NS_ASSERTION(view, "We asked for a view but didn't get one");
if (view) {
view->GetViewManager()->SetViewFloating(view, PR_TRUE);
nsWidgetInitData widgetData;
widgetData.mWindowType = eWindowType_popup;
widgetData.mBorderStyle = eBorderStyle_default;
#if defined(XP_MAC) || defined(XP_MACOSX)
static NS_DEFINE_IID(kCPopUpCID, NS_POPUP_CID);
view->CreateWidget(kCPopUpCID, &widgetData, nsnull);
#else
static NS_DEFINE_IID(kCChildCID, NS_CHILD_CID);
view->CreateWidget(kCChildCID, &widgetData, nsnull);
#endif
}
}
nsStyleContext* scrolledPseudoStyle;
BuildScrollFrame(aState, aContent, aStyleContext, scrolledFrame,
geometricParent, aParentFrame, scrollFrame,
scrolledPseudoStyle);
if (aState.mFrameState && aState.mFrameManager) {
// Restore frame state for the scroll frame
aState.mFrameManager->RestoreFrameStateFor(scrollFrame, aState.mFrameState);
}
// The area frame is a float container
PRBool haveFirstLetterStyle, haveFirstLineStyle;
HaveSpecialBlockStyle(aContent, aStyleContext,
&haveFirstLetterStyle, &haveFirstLineStyle);
nsFrameConstructorSaveState floatSaveState;
aState.PushFloatContainingBlock(scrolledFrame, floatSaveState,
haveFirstLetterStyle, haveFirstLineStyle);
// Process children
nsFrameConstructorSaveState absoluteSaveState;
nsFrameItems childItems;
if (display->IsPositioned()) {
// The area frame becomes a container for child frames that are
// absolutely positioned
aState.PushAbsoluteContainingBlock(scrolledFrame, absoluteSaveState);
}
ProcessChildren(aState, aContent, scrolledFrame, PR_FALSE,
childItems, PR_TRUE);
// if a select is being created with zero options we need to create
// a special pseudo frame so it can be sized as best it can
nsCOMPtr<nsIDOMHTMLSelectElement> selectElement;
nsresult result = aContent->QueryInterface(NS_GET_IID(nsIDOMHTMLSelectElement),
(void**)getter_AddRefs(selectElement));
if (NS_SUCCEEDED(result) && selectElement) {
AddDummyFrameToSelect(aState, scrollFrame, scrolledFrame, &childItems,
aContent, selectElement);
}
//////////////////////////////////////////////////
//////////////////////////////////////////////////
// Set the scrolled frame's initial child lists
scrolledFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
return NS_OK;
}
nsresult
nsCSSFrameConstructor::ConstructFieldSetFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
nsStyleContext* aStyleContext,
nsIFrame*& aNewFrame,
nsFrameItems& aFrameItems,
const nsStyleDisplay* aStyleDisplay,
PRBool& aFrameHasBeenInitialized)
{
nsIFrame * newFrame;
nsresult rv = NS_NewFieldSetFrame(mPresShell, &newFrame, NS_BLOCK_SPACE_MGR);
if (NS_FAILED(rv)) {
return rv;
}
// Initialize it
InitAndRestoreFrame(aState, aContent,
aState.GetGeometricParent(aStyleDisplay, aParentFrame),
aStyleContext, nsnull, newFrame);
// See if we need to create a view, e.g. the frame is absolutely
// positioned
nsHTMLContainerFrame::CreateViewForFrame(newFrame, aParentFrame, PR_FALSE);
nsIFrame* areaFrame;
NS_NewAreaFrame(mPresShell, &areaFrame,
NS_BLOCK_SPACE_MGR | NS_BLOCK_SHRINK_WRAP);
// Resolve style and initialize the frame
nsRefPtr<nsStyleContext> styleContext;
styleContext = mPresShell->StyleSet()->ResolvePseudoStyleFor(aContent,
nsCSSAnonBoxes::fieldsetContent,
aStyleContext);
InitAndRestoreFrame(aState, aContent, newFrame, styleContext, nsnull,
areaFrame);
rv = aState.AddChild(newFrame, aFrameItems, aStyleDisplay, aContent,
aStyleContext, aParentFrame);
if (NS_FAILED(rv)) {
return rv;
}
// The area frame is a float container
PRBool haveFirstLetterStyle, haveFirstLineStyle;
HaveSpecialBlockStyle(aContent, aStyleContext,
&haveFirstLetterStyle, &haveFirstLineStyle);
nsFrameConstructorSaveState floatSaveState;
aState.PushFloatContainingBlock(areaFrame, floatSaveState,
haveFirstLetterStyle,
haveFirstLineStyle);
// Process children
nsFrameConstructorSaveState absoluteSaveState;
nsFrameItems childItems;
if (aStyleDisplay->IsPositioned()) {
// The area frame becomes a container for child frames that are
// absolutely positioned
aState.PushAbsoluteContainingBlock(areaFrame, absoluteSaveState);
}
ProcessChildren(aState, aContent, areaFrame, PR_FALSE,
childItems, PR_TRUE);
static NS_DEFINE_IID(kLegendFrameCID, NS_LEGEND_FRAME_CID);
nsIFrame * child = childItems.childList;
nsIFrame * previous = nsnull;
nsIFrame* legendFrame = nsnull;
while (nsnull != child) {
nsresult result = child->QueryInterface(kLegendFrameCID, (void**)&legendFrame);
if (NS_SUCCEEDED(result) && legendFrame) {
// We want the legend to be the first frame in the fieldset child list.
// That way the EventStateManager will do the right thing when tabbing
// from a selection point within the legend (bug 236071), which is
// used for implementing legend access keys (bug 81481).
// GetAdjustedParentFrame() below depends on this frame order.
if (nsnull != previous) {
previous->SetNextSibling(legendFrame->GetNextSibling());
} else {
childItems.childList = legendFrame->GetNextSibling();
}
legendFrame->SetNextSibling(areaFrame);
legendFrame->SetParent(newFrame);
break;
}
previous = child;
child = child->GetNextSibling();
}
// Set the scrolled frame's initial child lists
areaFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
// Set the scroll frame's initial child list
newFrame->SetInitialChildList(aState.mPresContext, nsnull,
legendFrame ? legendFrame : areaFrame);
// our new frame retured is the top frame which is the list frame.
aNewFrame = newFrame;
// yes we have already initialized our frame
aFrameHasBeenInitialized = PR_TRUE;
return NS_OK;
}
nsresult
nsCSSFrameConstructor::ConstructTextFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems,
PRBool aPseudoParent)
{
// process pending pseudo frames. whitespace doesn't have an effect.
if (!aPseudoParent && !aState.mPseudoFrames.IsEmpty() &&
!IsOnlyWhitespace(aContent))
ProcessPseudoFrames(aState, aFrameItems);
nsIFrame* newFrame = nsnull;
#ifdef MOZ_SVG
nsresult rv;
nsCOMPtr<nsISVGTextContainerFrame> svg_parent = do_QueryInterface(aParentFrame);
if (svg_parent)
rv = NS_NewSVGGlyphFrame(mPresShell, aContent, aParentFrame, &newFrame);
else
rv = NS_NewTextFrame(mPresShell, &newFrame);
#else
nsresult rv = NS_NewTextFrame(mPresShell, &newFrame);
#endif
if (NS_FAILED(rv) || !newFrame)
return rv;
// Set the frame state bit for text frames to mark them as replaced.
// XXX kipp: temporary
newFrame->AddStateBits(NS_FRAME_REPLACED_ELEMENT);
InitAndRestoreFrame(aState, aContent, aParentFrame, aStyleContext, nsnull,
newFrame);
// We never need to create a view for a text frame.
// Set the frame's initial child list to null.
newFrame->SetInitialChildList(aState.mPresContext, nsnull, nsnull);
// Add the newly constructed frame to the flow
aFrameItems.AddChild(newFrame);
// Text frames don't go in the content->frame hash table, because
// they're anonymous. This keeps the hash table smaller
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructHTMLFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
PRInt32 aNameSpaceID,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems,
PRBool aHasPseudoParent)
{
// Ignore the tag if it's not HTML content and if it doesn't extend (via XBL)
// a valid HTML namespace.
if (!aContent->IsContentOfType(nsIContent::eHTML) &&
aNameSpaceID != kNameSpaceID_XHTML) {
return NS_OK;
}
PRBool processChildren = PR_FALSE; // whether we should process child content
PRBool frameHasBeenInitialized = PR_FALSE;
nsIFrame* newFrame = nsnull; // the frame we construct
PRBool isReplaced = PR_FALSE;
PRBool addToHashTable = PR_TRUE;
PRBool isFloatContainer = PR_FALSE;
PRBool addedToFrameList = PR_FALSE;
nsresult rv = NS_OK;
// See if the element is absolute or fixed positioned
const nsStyleDisplay* display = aStyleContext->GetStyleDisplay();
// Create a frame based on the tag
if (nsHTMLAtoms::img == aTag) {
isReplaced = PR_TRUE;
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
// XXX If image display is turned off, then use ConstructAlternateFrame()
// instead...
rv = NS_NewImageFrame(mPresShell, &newFrame);
}
else if (nsHTMLAtoms::br == aTag) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
rv = NS_NewBRFrame(mPresShell, &newFrame);
isReplaced = PR_TRUE;
// BR frames don't go in the content->frame hash table: typically
// there are many BR content objects and this would increase the size
// of the hash table, and it's doubtful we need the mapping anyway
addToHashTable = PR_FALSE;
}
else if (nsHTMLAtoms::wbr == aTag) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
rv = NS_NewWBRFrame(mPresShell, &newFrame);
}
else if (nsHTMLAtoms::input == aTag) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
isReplaced = PR_TRUE;
rv = CreateInputFrame(aContent, &newFrame, aStyleContext);
}
else if (nsHTMLAtoms::textarea == aTag) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
isReplaced = PR_TRUE;
rv = NS_NewTextControlFrame(mPresShell, &newFrame);
}
else if (nsHTMLAtoms::select == aTag) {
if (!gUseXBLForms) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
isReplaced = PR_TRUE;
rv = ConstructSelectFrame(aState, aContent, aParentFrame,
aTag, aStyleContext, newFrame,
display, frameHasBeenInitialized,
aFrameItems);
#ifdef DEBUG
nsIFrame* debugFrame = aFrameItems.lastChild;
if (debugFrame->GetType() == nsLayoutAtoms::placeholderFrame) {
debugFrame = ((nsPlaceholderFrame*)debugFrame)->GetOutOfFlowFrame();
}
NS_ASSERTION(debugFrame == newFrame,
"Frame didn't get added to aFrameItems?");
#endif
addedToFrameList = PR_TRUE;
}
}
else if (nsHTMLAtoms::object == aTag ||
nsHTMLAtoms::applet == aTag ||
nsHTMLAtoms::embed == aTag) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
isReplaced = PR_TRUE;
rv = NS_NewObjectFrame(mPresShell, &newFrame);
}
else if (nsHTMLAtoms::fieldset == aTag) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
rv = ConstructFieldSetFrame(aState, aContent, aParentFrame,
aTag, aStyleContext, newFrame,
aFrameItems, display, frameHasBeenInitialized);
#ifdef DEBUG
nsIFrame* debugFrame = aFrameItems.lastChild;
if (debugFrame->GetType() == nsLayoutAtoms::placeholderFrame) {
debugFrame = ((nsPlaceholderFrame*)debugFrame)->GetOutOfFlowFrame();
}
NS_ASSERTION(debugFrame == newFrame,
"Frame didn't get added to aFrameItems?");
#endif
addedToFrameList = PR_TRUE;
}
else if (nsHTMLAtoms::legend == aTag) {
NS_ASSERTION(!display->IsAbsolutelyPositioned() && !display->IsFloating(),
"Legends should not be positioned and should not float");
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
rv = NS_NewLegendFrame(mPresShell, &newFrame);
processChildren = PR_TRUE;
isFloatContainer = PR_TRUE;
}
else if (nsHTMLAtoms::frameset == aTag) {
NS_ASSERTION(!display->IsAbsolutelyPositioned() && !display->IsFloating(),
"Framesets should not be positioned and should not float");
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
rv = NS_NewHTMLFramesetFrame(mPresShell, &newFrame);
}
else if (nsHTMLAtoms::iframe == aTag) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
isReplaced = PR_TRUE;
rv = NS_NewSubDocumentFrame(mPresShell, &newFrame);
if (newFrame) {
// the nsSubDocumentFrame needs to know about its content parent during ::Init.
// there is no reasonable way to get the value there.
// so we store it as a frame property.
nsCOMPtr<nsIAtom> contentParentAtom = do_GetAtom("contentParent");
aState.mPresContext->PropertyTable()->
SetProperty(newFrame, contentParentAtom,
aParentFrame, nsnull, nsnull);
}
}
else if (nsHTMLAtoms::spacer == aTag) {
NS_ASSERTION(!display->IsAbsolutelyPositioned() && !display->IsFloating(),
"Spacers should not be positioned and should not float");
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
rv = NS_NewSpacerFrame(mPresShell, &newFrame);
}
else if (nsHTMLAtoms::button == aTag) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
rv = NS_NewHTMLButtonControlFrame(mPresShell, &newFrame);
// the html4 button needs to act just like a
// regular button except contain html content
// so it must be replaced or html outside it will
// draw into its borders. -EDV
isReplaced = PR_TRUE;
processChildren = PR_TRUE;
isFloatContainer = PR_TRUE;
}
else if (nsHTMLAtoms::isindex == aTag) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
isReplaced = PR_TRUE;
rv = NS_NewIsIndexFrame(mPresShell, &newFrame);
}
if (NS_FAILED(rv) || !newFrame)
return rv;
// If we succeeded in creating a frame then initialize it, process its
// children (if requested), and set the initial child list
// If the frame is a replaced element, then set the frame state bit
if (isReplaced) {
newFrame->AddStateBits(NS_FRAME_REPLACED_ELEMENT);
}
if (!frameHasBeenInitialized) {
NS_ASSERTION(!addedToFrameList,
"Frames that were already added to the frame list should be "
"initialized by now!");
nsIFrame* geometricParent = aState.GetGeometricParent(display,
aParentFrame);
rv = InitAndRestoreFrame(aState, aContent, geometricParent, aStyleContext,
nsnull, newFrame);
if (rv == NS_ERROR_FRAME_REPLACED) {
// The frame called CantRenderReplacedElement from inside Init(). That
// failed to do anything useful, since the frame was not in the frame
// tree yet... Create an alternate frame ourselves
newFrame->Destroy(aState.mPresContext);
if (aTag != nsHTMLAtoms::img && aTag != nsHTMLAtoms::input) {
// XXXbz This should really be made to work for <object> too...
return NS_OK;
}
// Try to construct the alternate frame
newFrame = nsnull;
rv = ConstructAlternateFrame(aContent, aStyleContext, geometricParent,
aParentFrame, newFrame);
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(newFrame, "ConstructAlternateFrame needs better error-checking");
} else {
NS_ASSERTION(NS_SUCCEEDED(rv), "InitAndRestoreFrame failed");
// See if we need to create a view, e.g. the frame is absolutely
// positioned
nsHTMLContainerFrame::CreateViewForFrame(newFrame, aParentFrame, PR_FALSE);
rv = aState.AddChild(newFrame, aFrameItems, display, aContent,
aStyleContext, aParentFrame);
if (NS_FAILED(rv)) {
return rv;
}
addedToFrameList = PR_TRUE;
// Process the child content if requested
nsFrameItems childItems;
nsFrameConstructorSaveState absoluteSaveState;
nsFrameConstructorSaveState floatSaveState;
if (processChildren) {
if (display->IsPositioned()) {
aState.PushAbsoluteContainingBlock(newFrame, absoluteSaveState);
}
if (isFloatContainer) {
PRBool haveFirstLetterStyle, haveFirstLineStyle;
HaveSpecialBlockStyle(aContent, aStyleContext,
&haveFirstLetterStyle, &haveFirstLineStyle);
aState.PushFloatContainingBlock(newFrame, floatSaveState,
PR_FALSE, PR_FALSE);
}
// Process the child frames
rv = ProcessChildren(aState, aContent, newFrame,
PR_TRUE, childItems, PR_FALSE);
}
// if there are any anonymous children create frames for them
CreateAnonymousFrames(aTag, aState, aContent, newFrame,
PR_FALSE, childItems);
// Set the frame's initial child list
if (childItems.childList) {
newFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
}
}
}
if (!addedToFrameList) {
// Gotta do it here. Note that things like absolutely positioned replaced
// elements and the like will end up in this code. So use the AddChild
// on the state.
rv = aState.AddChild(newFrame, aFrameItems, display, aContent,
aStyleContext, aParentFrame);
if (NS_FAILED(rv)) {
return rv;
}
}
if (newFrame) {
rv = CreateInsertionPointChildren(aState, newFrame, aContent);
NS_ENSURE_SUCCESS(rv, rv);
}
if (addToHashTable) {
// Add a mapping from content object to primary frame. Note that for
// floated and positioned frames this is the out-of-flow frame and not
// the placeholder frame
aState.mFrameManager->SetPrimaryFrameFor(aContent, newFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::CreateAnonymousFrames(nsIAtom* aTag,
nsFrameConstructorState& aState,
nsIContent* aParent,
nsIFrame* aNewFrame,
PRBool aAppendToExisting,
nsFrameItems& aChildItems,
PRBool aIsRoot)
{
// See if we might have anonymous content
// by looking at the tag rather than doing a QueryInterface on
// the frame. Only these tags' frames can have anonymous content
// through nsIAnonymousContentCreator. We do this check for
// performance reasons. If we did a QueryInterface on every tag it
// would be inefficient.
// nsGenericElement::SetDocument ought to keep a list like this one,
// but it can't because scroll frames get around this.
if (!aIsRoot &&
aTag != nsHTMLAtoms::input &&
aTag != nsHTMLAtoms::textarea &&
aTag != nsHTMLAtoms::combobox &&
aTag != nsHTMLAtoms::isindex &&
aTag != nsXULAtoms::scrollbar
#ifdef MOZ_SVG
&& aTag != nsSVGAtoms::use
#endif
)
return NS_OK;
return CreateAnonymousFrames(aState, aParent, mDocument, aNewFrame, PR_FALSE,
aAppendToExisting, aChildItems,
nsnull, nsnull, PR_FALSE);
}
// after the node has been constructed and initialized create any
// anonymous content a node needs.
nsresult
nsCSSFrameConstructor::CreateAnonymousFrames(nsFrameConstructorState& aState,
nsIContent* aParent,
nsIDocument* aDocument,
nsIFrame* aParentFrame,
PRBool aForceBindingParent,
PRBool aAppendToExisting,
nsFrameItems& aChildItems,
nsIFrame* aAnonymousCreator,
nsIContent* aInsertionNode,
PRBool aAnonymousParentIsBlock)
{
nsCOMPtr<nsIAnonymousContentCreator> creator(do_QueryInterface(aParentFrame));
if (!creator)
return NS_OK;
nsFrameConstructorInsertionState saveState;
aState.PushAnonymousContentCreator(aAnonymousCreator,
aInsertionNode,
aAnonymousParentIsBlock,
saveState);
nsCOMPtr<nsISupportsArray> anonymousItems;
NS_NewISupportsArray(getter_AddRefs(anonymousItems));
creator->CreateAnonymousContent(aState.mPresContext, *anonymousItems);
PRUint32 count = 0;
anonymousItems->Count(&count);
if (count) {
// save the incoming pseudo frame state, so that we don't end up
// with those pseudoframes in aChildItems
nsPseudoFrames priorPseudoFrames;
aState.mPseudoFrames.Reset(&priorPseudoFrames);
// A content element can have multiple sources of anonymous content. For example,
// SELECTs have a combobox dropdown button and also scrollbars in the list view.
// nsPresShell doesn't handle this very well. It's a problem because a reframe could
// cause anonymous content from one source to be destroyed and recreated while
// (in theory) leaving the rest intact, but the presshell doesn't have a way of tracking
// the anonymous content at that granularity.
// So what we're doing right now is wiping out existing content whenever we get new
// anonymous content, except for the one case we care about where there are multiple
// sources (SELECTs). This case is handled by having SELECT initialization tell us
// explicitly not to wipe out the scrollbars when the combobox anonymous content is
// added.
// Note that we only wipe out existing content when there is actual new content.
// Otherwise we wipe out scrollbars and other anonymous content when we check sources
// that never provide anonymous content (e.g. the call to CreateAnonymousFrames
// from ConstructBlock).
// What we SHOULD do is get rid of the presshell's need to track anonymous
// content. It's only used for cleanup as far as I can tell.
if (!aAppendToExisting) {
mPresShell->SetAnonymousContentFor(aParent, nsnull);
}
// Inform the pres shell about the anonymous content
mPresShell->SetAnonymousContentFor(aParent, anonymousItems);
for (PRUint32 i=0; i < count; i++) {
// get our child's content and set its parent to our content
nsCOMPtr<nsIContent> content;
if (NS_FAILED(anonymousItems->QueryElementAt(i, NS_GET_IID(nsIContent), getter_AddRefs(content))))
continue;
content->SetNativeAnonymous(PR_TRUE);
content->SetParent(aParent);
content->SetDocument(aDocument, PR_TRUE, PR_TRUE);
nsresult rv;
#ifdef MOZ_XUL
// Only cut XUL scrollbars off if they're not in a XUL document.
// This allows scrollbars to be styled from XUL (although not
// from XML or HTML).
nsINodeInfo *ni = content->GetNodeInfo();
if (ni && (ni->Equals(nsXULAtoms::scrollbar, kNameSpaceID_XUL) ||
ni->Equals(nsXULAtoms::scrollcorner, kNameSpaceID_XUL))) {
nsCOMPtr<nsIDOMXULDocument> xulDoc(do_QueryInterface(aDocument));
if (xulDoc)
rv = content->SetBindingParent(aParent);
else
rv = content->SetBindingParent(content);
}
else
#endif
#ifdef MOZ_XTF
if (aForceBindingParent)
rv = content->SetBindingParent(aParent);
else
#endif
#ifdef MOZ_SVG
// least-surprise CSS binding until we do the SVG specified
// cascading rules for <svg:use> - bug 265894
if (aParent &&
aParent->GetNodeInfo() &&
aParent->GetNodeInfo()->Equals(nsSVGAtoms::use, kNameSpaceID_SVG))
rv = content->SetBindingParent(aParent);
else
#endif
rv = content->SetBindingParent(content);
NS_ENSURE_SUCCESS(rv, rv);
nsIFrame * newFrame = nsnull;
rv = creator->CreateFrameFor(aState.mPresContext, content, &newFrame);
if (NS_SUCCEEDED(rv) && newFrame != nsnull) {
aChildItems.AddChild(newFrame);
}
else {
// create the frame and attach it to our frame
ConstructFrame(aState, content, aParentFrame, aChildItems);
}
creator->PostCreateFrames();
}
// process the current pseudo frame state
if (!aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aChildItems);
}
// restore the incoming pseudo frame state
aState.mPseudoFrames = priorPseudoFrames;
}
return NS_OK;
}
static
PRBool IsXULDisplayType(const nsStyleDisplay* aDisplay)
{
return (aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_BOX ||
aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_GRID ||
aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_STACK ||
aDisplay->mDisplay == NS_STYLE_DISPLAY_BOX ||
aDisplay->mDisplay == NS_STYLE_DISPLAY_GRID ||
aDisplay->mDisplay == NS_STYLE_DISPLAY_STACK ||
aDisplay->mDisplay == NS_STYLE_DISPLAY_GRID_GROUP ||
aDisplay->mDisplay == NS_STYLE_DISPLAY_GRID_LINE ||
aDisplay->mDisplay == NS_STYLE_DISPLAY_DECK ||
aDisplay->mDisplay == NS_STYLE_DISPLAY_POPUP ||
aDisplay->mDisplay == NS_STYLE_DISPLAY_GROUPBOX
);
}
nsresult
nsCSSFrameConstructor::ConstructXULFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
PRInt32 aNameSpaceID,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems,
PRBool aXBLBaseTag,
PRBool aHasPseudoParent,
PRBool& aHaltProcessing)
{
PRBool primaryFrameSet = PR_FALSE;
PRBool processChildren = PR_FALSE; // whether we should process child content
PRBool processAnonymousChildren = PR_FALSE; // whether or not we process anonymous content.
nsresult rv = NS_OK;
PRBool isPopup = PR_FALSE;
PRBool isReplaced = PR_FALSE;
PRBool frameHasBeenInitialized = PR_FALSE;
// XXXbz somewhere here we should process pseudo frames if !aHasPseudoParent
// this is the new frame that will be created
nsIFrame* newFrame = nsnull;
// this is the also the new frame that is created. But if a scroll frame is needed
// the content will be mapped to the scrollframe and topFrame will point to it.
// newFrame will still point to the child that we created like a "div" for example.
nsIFrame* topFrame = nsnull;
// Store aParentFrame away, since we plan to stomp on it later
nsIFrame* origParentFrame = aParentFrame;
NS_ASSERTION(aTag != nsnull, "null XUL tag");
if (aTag == nsnull)
return NS_OK;
const nsStyleDisplay* display = aStyleContext->GetStyleDisplay();
PRBool isXULNS = (aNameSpaceID == kNameSpaceID_XUL);
PRBool isXULDisplay = IsXULDisplayType(display);
if (isXULNS || isXULDisplay) {
PRBool mayBeScrollable = PR_FALSE;
if (isXULNS) {
// First try creating a frame based on the tag
#ifdef MOZ_XUL
// BUTTON CONSTRUCTION
if (aTag == nsXULAtoms::button || aTag == nsXULAtoms::checkbox || aTag == nsXULAtoms::radio) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewButtonBoxFrame(mPresShell, &newFrame);
// Boxes can scroll.
mayBeScrollable = PR_TRUE;
} // End of BUTTON CONSTRUCTION logic
// AUTOREPEATBUTTON CONSTRUCTION
else if (aTag == nsXULAtoms::autorepeatbutton) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewAutoRepeatBoxFrame(mPresShell, &newFrame);
// Boxes can scroll.
mayBeScrollable = PR_TRUE;
} // End of AUTOREPEATBUTTON CONSTRUCTION logic
// TITLEBAR CONSTRUCTION
else if (aTag == nsXULAtoms::titlebar) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewTitleBarFrame(mPresShell, &newFrame);
// Boxes can scroll.
mayBeScrollable = PR_TRUE;
} // End of TITLEBAR CONSTRUCTION logic
// RESIZER CONSTRUCTION
else if (aTag == nsXULAtoms::resizer) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewResizerFrame(mPresShell, &newFrame);
// Boxes can scroll.
mayBeScrollable = PR_TRUE;
} // End of RESIZER CONSTRUCTION logic
else if (aTag == nsXULAtoms::image) {
isReplaced = PR_TRUE;
rv = NS_NewImageBoxFrame(mPresShell, &newFrame);
}
else if (aTag == nsXULAtoms::spring ||
aTag == nsHTMLAtoms::spacer) {
isReplaced = PR_TRUE;
rv = NS_NewLeafBoxFrame(mPresShell, &newFrame);
}
else if (aTag == nsXULAtoms::treechildren) {
isReplaced = PR_TRUE;
rv = NS_NewTreeBodyFrame(mPresShell, &newFrame);
}
else if (aTag == nsXULAtoms::treecol) {
isReplaced = PR_TRUE;
processChildren = PR_TRUE;
rv = NS_NewTreeColFrame(mPresShell, &newFrame);
}
#ifdef MOZ_ENABLE_CAIRO
else if (aTag == nsXULAtoms::canvas) {
isReplaced = PR_TRUE;
rv = NS_NewCanvasXULFrame(mPresShell, &newFrame);
}
#endif
// TEXT CONSTRUCTION
else if (aTag == nsXULAtoms::text || aTag == nsHTMLAtoms::label ||
aTag == nsXULAtoms::description) {
if ((aTag == nsHTMLAtoms::label || aTag == nsXULAtoms::description) &&
(! aContent->HasAttr(kNameSpaceID_None, nsHTMLAtoms::value))) {
processChildren = PR_TRUE;
rv = NS_NewAreaFrame(mPresShell, &newFrame,
NS_BLOCK_SPACE_MGR | NS_BLOCK_SHRINK_WRAP | NS_BLOCK_MARGIN_ROOT);
}
else {
isReplaced = PR_TRUE;
rv = NS_NewTextBoxFrame(mPresShell, &newFrame);
}
}
// End of TEXT CONSTRUCTION logic
// Menu Construction
else if (aTag == nsXULAtoms::menu ||
aTag == nsXULAtoms::menuitem ||
aTag == nsXULAtoms::menubutton) {
// A derived class box frame
// that has custom reflow to prevent menu children
// from becoming part of the flow.
processChildren = PR_TRUE; // Will need this to be custom.
isReplaced = PR_TRUE;
rv = NS_NewMenuFrame(mPresShell, &newFrame, (aTag != nsXULAtoms::menuitem));
}
else if (aTag == nsXULAtoms::menubar) {
#if defined(XP_MAC) || defined(XP_MACOSX) // The Mac uses its native menu bar.
aHaltProcessing = PR_TRUE;
return NS_OK;
#else
processChildren = PR_TRUE;
rv = NS_NewMenuBarFrame(mPresShell, &newFrame);
#endif
}
else if (aTag == nsXULAtoms::popupgroup) {
// This frame contains child popups
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewPopupSetFrame(mPresShell, &newFrame);
}
else if (aTag == nsXULAtoms::iframe || aTag == nsXULAtoms::editor ||
aTag == nsXULAtoms::browser) {
isReplaced = PR_TRUE;
rv = NS_NewSubDocumentFrame(mPresShell, &newFrame);
}
// PROGRESS METER CONSTRUCTION
else if (aTag == nsXULAtoms::progressmeter) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewProgressMeterFrame(mPresShell, &newFrame);
}
// End of PROGRESS METER CONSTRUCTION logic
else
#endif
// SLIDER CONSTRUCTION
if (aTag == nsXULAtoms::slider) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewSliderFrame(mPresShell, &newFrame);
}
// End of SLIDER CONSTRUCTION logic
// SCROLLBAR CONSTRUCTION
else if (aTag == nsXULAtoms::scrollbar) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewScrollbarFrame(mPresShell, &newFrame);
}
else if (aTag == nsXULAtoms::nativescrollbar) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewNativeScrollbarFrame(mPresShell, &newFrame);
}
// End of SCROLLBAR CONSTRUCTION logic
// SCROLLBUTTON CONSTRUCTION
else if (aTag == nsXULAtoms::scrollbarbutton) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewScrollbarButtonFrame(mPresShell, &newFrame);
}
// End of SCROLLBUTTON CONSTRUCTION logic
#ifdef MOZ_XUL
// SPLITTER CONSTRUCTION
else if (aTag == nsXULAtoms::splitter) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewSplitterFrame(mPresShell, &newFrame);
}
// End of SPLITTER CONSTRUCTION logic
// GRIPPY CONSTRUCTION
else if (aTag == nsXULAtoms::grippy) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewGrippyFrame(mPresShell, &newFrame);
}
// End of GRIPPY CONSTRUCTION logic
#endif
}
// Display types for XUL start here
// First is BOX
if (!newFrame && isXULDisplay) {
if (display->mDisplay == NS_STYLE_DISPLAY_INLINE_BOX ||
display->mDisplay == NS_STYLE_DISPLAY_BOX) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewBoxFrame(mPresShell, &newFrame, PR_FALSE, nsnull);
// Boxes can scroll.
mayBeScrollable = PR_TRUE;
} // End of BOX CONSTRUCTION logic
#ifdef MOZ_XUL
// ------- Begin Grid ---------
else if (display->mDisplay == NS_STYLE_DISPLAY_INLINE_GRID ||
display->mDisplay == NS_STYLE_DISPLAY_GRID) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
nsCOMPtr<nsIBoxLayout> layout;
NS_NewGridLayout2(mPresShell, getter_AddRefs(layout));
rv = NS_NewBoxFrame(mPresShell, &newFrame, PR_FALSE, layout);
// Boxes can scroll.
mayBeScrollable = PR_TRUE;
} //------- End Grid ------
// ------- Begin Rows/Columns ---------
else if (display->mDisplay == NS_STYLE_DISPLAY_GRID_GROUP) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
nsCOMPtr<nsIBoxLayout> layout;
if (aTag == nsXULAtoms::listboxbody) {
NS_NewListBoxLayout(mPresShell, layout);
rv = NS_NewListBoxBodyFrame(mPresShell, &newFrame, PR_FALSE, layout);
((nsListBoxBodyFrame*)newFrame)->InitGroup(this,
aState.mPresContext);
processChildren = PR_FALSE;
}
else
{
NS_NewGridRowGroupLayout(mPresShell, getter_AddRefs(layout));
rv = NS_NewGridRowGroupFrame(mPresShell, &newFrame, PR_FALSE, layout);
}
// Boxes can scroll.
if (display->IsScrollableOverflow()) {
// set the top to be the newly created scrollframe
BuildScrollFrame(aState, aContent, aStyleContext, newFrame,
aParentFrame, nsnull, topFrame, aStyleContext);
// we have a scrollframe so the parent becomes the scroll frame.
aParentFrame = newFrame->GetParent();
primaryFrameSet = PR_TRUE;
frameHasBeenInitialized = PR_TRUE;
}
} //------- End Grid ------
// ------- Begin Row/Column ---------
else if (display->mDisplay == NS_STYLE_DISPLAY_GRID_LINE) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
nsCOMPtr<nsIBoxLayout> layout;
NS_NewGridRowLeafLayout(mPresShell, getter_AddRefs(layout));
if (aTag == nsXULAtoms::listitem)
rv = NS_NewListItemFrame(mPresShell, &newFrame, PR_FALSE, layout);
else
rv = NS_NewGridRowLeafFrame(mPresShell, &newFrame, PR_FALSE, layout);
// Boxes can scroll.
mayBeScrollable = PR_TRUE;
} //------- End Grid ------
// End of STACK CONSTRUCTION logic
// DECK CONSTRUCTION
else if (display->mDisplay == NS_STYLE_DISPLAY_DECK) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewDeckFrame(mPresShell, &newFrame);
}
// End of DECK CONSTRUCTION logic
else if (display->mDisplay == NS_STYLE_DISPLAY_GROUPBOX) {
rv = NS_NewGroupBoxFrame(mPresShell, &newFrame);
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
// Boxes can scroll.
mayBeScrollable = PR_TRUE;
}
// STACK CONSTRUCTION
else if (display->mDisplay == NS_STYLE_DISPLAY_STACK ||
display->mDisplay == NS_STYLE_DISPLAY_INLINE_STACK) {
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewStackFrame(mPresShell, &newFrame);
mayBeScrollable = PR_TRUE;
}
else if (display->mDisplay == NS_STYLE_DISPLAY_POPUP) {
// This is its own frame that derives from
// box.
processChildren = PR_TRUE;
isReplaced = PR_TRUE;
rv = NS_NewMenuPopupFrame(mPresShell, &newFrame);
if (aTag == nsXULAtoms::tooltip) {
nsAutoString defaultTooltip;
aContent->GetAttr(kNameSpaceID_None, nsXULAtoms::defaultz, defaultTooltip);
if (defaultTooltip.LowerCaseEqualsLiteral("true")) {
// Locate the root frame and tell it about the tooltip.
nsIFrame* rootFrame = aState.mFrameManager->GetRootFrame();
if (rootFrame)
rootFrame = rootFrame->GetFirstChild(nsnull);
nsCOMPtr<nsIRootBox> rootBox(do_QueryInterface(rootFrame));
if (rootBox)
rootBox->SetDefaultTooltip(aContent);
}
}
// If a popup is inside a menu, then the menu understands the complex
// rules/behavior governing the cascade of multiple menu popups and can handle
// having the real popup frame placed under it as a child.
// If, however, the parent is *not* a menu frame, then we need to create
// a placeholder frame for the popup, and then we add the popup frame to the
// root popup set (that manages all such "detached" popups).
nsCOMPtr<nsIMenuFrame> menuFrame(do_QueryInterface(aParentFrame));
if (!menuFrame)
isPopup = PR_TRUE;
}
#endif
}
if (mayBeScrollable && display->IsScrollableOverflow()) {
// set the top to be the newly created scrollframe
BuildScrollFrame(aState, aContent, aStyleContext, newFrame,
aParentFrame, nsnull, topFrame, aStyleContext);
// we have a scrollframe so the parent becomes the scroll frame.
// XXXldb Do we really want to do this? The one case where it
// matters when |frameHasBeenInitialized| is true is one where
// I think we'd be better off the other way around.
aParentFrame = newFrame->GetParent();
primaryFrameSet = PR_TRUE;
frameHasBeenInitialized = PR_TRUE;
}
}
// If we succeeded in creating a frame then initialize it, process its
// children (if requested), and set the initial child list
if (NS_SUCCEEDED(rv) && newFrame != nsnull) {
// if no top frame was created then the top is the new frame
if (topFrame == nsnull)
topFrame = newFrame;
// If the frame is a replaced element, then set the frame state bit
if (isReplaced) {
newFrame->AddStateBits(NS_FRAME_REPLACED_ELEMENT);
}
// xul does not support absolute positioning
nsIFrame* geometricParent = aParentFrame;
/*
nsIFrame* geometricParent = aState.GetGeometricParent(display, aParentFrame);
*/
// if the new frame was already initialized to initialize it again.
if (!frameHasBeenInitialized) {
rv = InitAndRestoreFrame(aState, aContent, geometricParent,
aStyleContext, nsnull, newFrame);
if (NS_FAILED(rv)) {
newFrame->Destroy(aState.mPresContext);
return rv;
}
/*
// if our parent is a block frame then do things the way html likes it
// if not then we are in a box so do what boxes like. On example is boxes
// do not support the absolute positioning of their children. While html blocks
// thats why we call different things here.
nsIAtom* frameType = geometricParent->GetType();
if ((frameType == nsLayoutAtoms::blockFrame) ||
(frameType == nsLayoutAtoms::areaFrame)) {
*/
// See if we need to create a view, e.g. the frame is absolutely positioned
nsHTMLContainerFrame::CreateViewForFrame(newFrame, aParentFrame, PR_FALSE);
/*
} else {
// we are in a box so do the box thing.
nsBoxFrame::CreateViewForFrame(aState.mPresContext, newFrame,
aStyleContext, PR_FALSE);
}
*/
}
// If the frame is a popup, then create a placeholder frame
#ifdef MOZ_XUL
if (isPopup) {
nsIFrame* placeholderFrame;
CreatePlaceholderFrameFor(mPresShell, aState.mPresContext,
aState.mFrameManager, aContent,
newFrame, aStyleContext, aParentFrame,
&placeholderFrame);
// Locate the root popup set and add ourselves to the popup set's list
// of popup frames.
nsIFrame* rootFrame = aState.mFrameManager->GetRootFrame();
if (rootFrame)
rootFrame = rootFrame->GetFirstChild(nsnull);
nsCOMPtr<nsIRootBox> rootBox(do_QueryInterface(rootFrame));
NS_ASSERTION(rootBox, "unexpected null pointer");
if (rootBox) {
nsIFrame* popupSetFrame;
rootBox->GetPopupSetFrame(&popupSetFrame);
NS_ASSERTION(popupSetFrame, "unexpected null pointer");
if (popupSetFrame) {
nsCOMPtr<nsIPopupSetFrame> popupSet(do_QueryInterface(popupSetFrame));
NS_ASSERTION(popupSet, "unexpected null pointer");
if (popupSet)
popupSet->AddPopupFrame(newFrame);
}
}
// Add the placeholder frame to the flow
aFrameItems.AddChild(placeholderFrame);
} else {
#endif
// Add the new frame to our list of frame items. Note that we
// don't support floating or positioning of XUL frames.
rv = aState.AddChild(topFrame, aFrameItems, display, aContent,
aStyleContext, origParentFrame, PR_FALSE, PR_FALSE);
if (NS_FAILED(rv)) {
return rv;
}
#ifdef MOZ_XUL
}
#endif
// Process the child content if requested
if (processChildren || processAnonymousChildren) {
nsFrameItems childItems;
if (processChildren) {
mDocument->BindingManager()->ShouldBuildChildFrames(aContent,
&processChildren);
if (processChildren)
rv = ProcessChildren(aState, aContent, newFrame, PR_FALSE,
childItems, PR_FALSE);
}
CreateAnonymousFrames(aTag, aState, aContent, newFrame, PR_FALSE,
childItems);
// Set the frame's initial child list
newFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
}
}
#ifdef MOZ_XUL
// register tooltip support if needed
nsAutoString value;
if (aTag == nsXULAtoms::treechildren || // trees always need titletips
aContent->GetAttr(kNameSpaceID_None, nsXULAtoms::tooltiptext, value) !=
NS_CONTENT_ATTR_NOT_THERE ||
aContent->GetAttr(kNameSpaceID_None, nsXULAtoms::tooltip, value) !=
NS_CONTENT_ATTR_NOT_THERE)
{
nsIFrame* rootFrame = aState.mFrameManager->GetRootFrame();
if (rootFrame)
rootFrame = rootFrame->GetFirstChild(nsnull);
nsCOMPtr<nsIRootBox> rootBox(do_QueryInterface(rootFrame));
if (rootBox)
rootBox->AddTooltipSupport(aContent);
}
#endif
// addToHashTable:
if (newFrame) {
rv = CreateInsertionPointChildren(aState, newFrame, aContent);
NS_ENSURE_SUCCESS(rv, rv);
}
if (topFrame) {
// the top frame is always what we map the content to. This is the frame that contains a pointer
// to the content node.
// Add a mapping from content object to primary frame. Note that for
// floated and positioned frames this is the out-of-flow frame and not
// the placeholder frame
if (!primaryFrameSet)
aState.mFrameManager->SetPrimaryFrameFor(aContent, topFrame);
}
return rv;
}
already_AddRefed<nsStyleContext>
nsCSSFrameConstructor::BeginBuildingScrollFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsStyleContext* aContentStyle,
nsIFrame* aParentFrame,
nsIFrame* aContentParentFrame,
nsIAtom* aScrolledPseudo,
PRBool aIsRoot,
nsIFrame*& aNewFrame,
nsIFrame*& aScrollableFrame)
{
// Check to see the type of parent frame so we know whether we need to
// turn off/on scaling for the scrollbars
//
// If the parent is a viewportFrame then we are the scrollbars for the UI
// if not then we are scrollbars inside the document.
PRBool noScalingOfTwips = PR_FALSE;
PRBool isPrintPreview =
aState.mPresContext->Type() == nsPresContext::eContext_PrintPreview;
if (isPrintPreview) {
noScalingOfTwips = aParentFrame->GetType() == nsLayoutAtoms::viewportFrame;
if (noScalingOfTwips) {
aState.mPresContext->SetScalingOfTwips(PR_FALSE);
}
}
nsIFrame* scrollFrame = nsnull;
nsIFrame* parentFrame = nsnull;
nsIFrame* gfxScrollFrame = aNewFrame;
nsFrameItems anonymousItems;
nsRefPtr<nsStyleContext> contentStyle = aContentStyle;
if (!gfxScrollFrame) {
// Build a XULScrollFrame when the parent is a box, because XULScrollFrames
// do box layout well. Otherwise build an HTMLScrollFrame.
if (aParentFrame->IsBoxFrame()) {
NS_NewXULScrollFrame(mPresShell, &gfxScrollFrame, aIsRoot);
} else {
NS_NewHTMLScrollFrame(mPresShell, &gfxScrollFrame, aIsRoot);
}
InitAndRestoreFrame(aState, aContent, aParentFrame, contentStyle, nsnull,
gfxScrollFrame);
// Create a view
nsHTMLContainerFrame::CreateViewForFrame(gfxScrollFrame,
aContentParentFrame, PR_FALSE);
}
InitGfxScrollFrame(aState, aContent, mDocument,
aParentFrame, aContentParentFrame, contentStyle,
aIsRoot, gfxScrollFrame, anonymousItems);
scrollFrame = anonymousItems.childList; // get the scrollport from the anonymous list
parentFrame = gfxScrollFrame;
aNewFrame = gfxScrollFrame;
// we used the style that was passed in. So resolve another one.
nsRefPtr<nsStyleContext> scrollPseudoStyle;
nsStyleSet *styleSet = mPresShell->StyleSet();
scrollPseudoStyle = styleSet->ResolvePseudoStyleFor(aContent,
nsCSSAnonBoxes::scrolledContent,
contentStyle);
contentStyle = scrollPseudoStyle;
InitAndRestoreFrame(aState, aContent, parentFrame, contentStyle, nsnull,
scrollFrame);
nsStyleContext* aScrolledChildStyle = styleSet->ResolvePseudoStyleFor(aContent,
aScrolledPseudo,
contentStyle).get();
aScrollableFrame = scrollFrame;
// set the child frame for the gfxscrollbar if the is one. This frames will be the
// 2 scrollbars and the scrolled frame.
if (gfxScrollFrame) {
gfxScrollFrame->SetInitialChildList(aState.mPresContext, nsnull,
anonymousItems.childList);
}
if (isPrintPreview && noScalingOfTwips) {
aState.mPresContext->SetScalingOfTwips(PR_TRUE);
}
return aScrolledChildStyle;;
}
void
nsCSSFrameConstructor::FinishBuildingScrollFrame(nsIFrame* aScrollFrame,
nsIFrame* aScrolledFrame)
{
// create a view
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(aScrolledFrame, nsnull, PR_TRUE);
// the the scroll frames child list
aScrollFrame->SetInitialChildList(aScrollFrame->GetPresContext(), nsnull, aScrolledFrame);
}
/**
* Called to wrap a gfx scrollframe around a frame. The hierarchy will look like this
*
* ------- for gfx scrollbars ------
*
*
* ScrollFrame
* ^
* |
* ScrollBox
* ^
* |
* Frame (scrolled frame you passed in)
*
*
*-----------------------------------
* LEGEND:
*
* GfxScrollFrame: This is a frame that manages gfx cross platform frame based scrollbars.
*
* ScrollBox: This clips and scrolls its children with a native scrolling window.
*
* @param aContent the content node of the child to wrap.
* @param aScrolledFrame The frame of the content to wrap. This should not be
* Initialized. This method will initialize it with a scrolled pseudo
* and no nsIContent. The content will be attached to the scrollframe
* returned.
* @param aContentStyle the style context that has already been resolved for the content being passed in.
*
* @param aParentFrame The parent to attach the scroll frame to
*
* @param aNewFrame The new scrollframe or gfx scrollframe that we create. It will contain the
* scrolled frame you passed in. (returned)
* If this is not null, we'll just use it
* @param aScrolledContentStyle the style that was resolved for the scrolled frame. (returned)
*/
nsresult
nsCSSFrameConstructor::BuildScrollFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsStyleContext* aContentStyle,
nsIFrame* aScrolledFrame,
nsIFrame* aParentFrame,
nsIFrame* aContentParentFrame,
nsIFrame*& aNewFrame,
nsStyleContext*& aScrolledContentStyle)
{
nsIFrame *scrollFrame;
nsRefPtr<nsStyleContext> scrolledContentStyle;
scrolledContentStyle = BeginBuildingScrollFrame(aState,
aContent,
aContentStyle,
aParentFrame,
aContentParentFrame,
nsCSSAnonBoxes::scrolledContent,
PR_FALSE,
aNewFrame,
scrollFrame);
InitAndRestoreFrame(aState, aContent, scrollFrame, scrolledContentStyle,
nsnull, aScrolledFrame);
FinishBuildingScrollFrame(scrollFrame, aScrolledFrame);
aScrolledContentStyle = scrolledContentStyle;
// now set the primary frame to the ScrollFrame
aState.mFrameManager->SetPrimaryFrameFor( aContent, aNewFrame );
return NS_OK;
}
/**
* If we are building GFX scrollframes this will create one
* if aNewFrame gets a frame passed in, we'll use it instead
* of creating a new frame
*/
nsresult
nsCSSFrameConstructor::InitGfxScrollFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIDocument* aDocument,
nsIFrame* aParentFrame,
nsIFrame* aContentParentFrame,
nsStyleContext* aStyleContext,
PRBool aIsRoot,
nsIFrame*& aNewFrame,
nsFrameItems& aAnonymousFrames)
{
nsIFrame* scrollBox;
NS_NewScrollBoxFrame(mPresShell, &scrollBox);
aAnonymousFrames.AddChild(scrollBox);
// if there are any anonymous children for the scroll frame, create frames for them.
CreateAnonymousFrames(aState, aContent, aDocument, aNewFrame, PR_FALSE,
PR_FALSE, aAnonymousFrames, nsnull, nsnull, PR_FALSE);
return NS_OK;
}
nsresult
nsCSSFrameConstructor::ConstructFrameByDisplayType(nsFrameConstructorState& aState,
const nsStyleDisplay* aDisplay,
nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aTag,
nsIFrame* aParentFrame,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems,
PRBool aHasPseudoParent)
{
PRBool primaryFrameSet = PR_FALSE;
nsIFrame* newFrame = nsnull; // the frame we construct
nsTableCreator tableCreator(mPresShell); // Used to make table frames.
PRBool addToHashTable = PR_TRUE;
PRBool addedToFrameList = PR_FALSE;
nsresult rv = NS_OK;
// The style system ensures that floated and positioned frames are
// block-level.
NS_ASSERTION(!(aDisplay->IsFloating() ||
aDisplay->IsAbsolutelyPositioned()) ||
aDisplay->IsBlockLevel(),
"Style system did not apply CSS2.1 section 9.7 fixups");
// If this is "body", try propagating its scroll style to the viewport
// Note that we need to do this even if the body is NOT scrollable;
// it might have dynamically changed from scrollable to not scrollable,
// and that might need to be propagated.
PRBool propagatedScrollToViewport = PR_FALSE;
if (aContent->GetNodeInfo()->Equals(nsHTMLAtoms::body) &&
aContent->IsContentOfType(nsIContent::eHTML)) {
propagatedScrollToViewport =
PropagateScrollToViewport() == aContent;
}
// If the frame is a block-level frame and is scrollable, then wrap it
// in a scroll frame.
// XXX Ignore tables for the time being
if (aDisplay->IsBlockLevel() &&
aDisplay->mDisplay != NS_STYLE_DISPLAY_TABLE &&
aDisplay->IsScrollableOverflow() &&
!propagatedScrollToViewport) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
nsIFrame *scrollFrame;
nsRefPtr<nsStyleContext> scrolledContentStyle
= BeginBuildingScrollFrame(aState, aContent, aStyleContext,
aState.GetGeometricParent(aDisplay, aParentFrame),
aParentFrame,
nsCSSAnonBoxes::scrolledContent,
PR_FALSE,
newFrame, scrollFrame);
// Initialize it
nsIFrame* scrolledFrame = nsnull;
NS_NewAreaFrame(mPresShell, &scrolledFrame, NS_BLOCK_SPACE_MGR |
NS_BLOCK_SHRINK_WRAP | NS_BLOCK_MARGIN_ROOT);
nsFrameItems blockItem;
rv = ConstructBlock(aState,
scrolledContentStyle->GetStyleDisplay(), aContent,
scrollFrame, scrollFrame, scrolledContentStyle,
&scrolledFrame, blockItem, aDisplay->IsPositioned());
NS_ASSERTION(blockItem.childList == scrolledFrame,
"Scrollframe's frameItems should be exactly the scrolled frame");
FinishBuildingScrollFrame(scrollFrame, scrolledFrame);
rv = aState.AddChild(newFrame, aFrameItems, aDisplay, aContent,
aStyleContext, aParentFrame);
if (NS_FAILED(rv)) {
return rv;
}
addedToFrameList = PR_TRUE;
}
// See if the frame is absolute or fixed positioned
else if (aDisplay->IsAbsolutelyPositioned() &&
(NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay ||
NS_STYLE_DISPLAY_LIST_ITEM == aDisplay->mDisplay)) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
// Create a frame to wrap up the absolute positioned item
NS_NewAbsoluteItemWrapperFrame(mPresShell, &newFrame);
rv = ConstructBlock(aState, aDisplay, aContent,
aState.GetGeometricParent(aDisplay, aParentFrame), aParentFrame,
aStyleContext, &newFrame, aFrameItems, PR_TRUE);
if (NS_FAILED(rv)) {
return rv;
}
addedToFrameList = PR_TRUE;
}
// See if the frame is floated and it's a block frame
else if (aDisplay->IsFloating() &&
(NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay ||
NS_STYLE_DISPLAY_LIST_ITEM == aDisplay->mDisplay)) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
// Create an area frame
NS_NewFloatingItemWrapperFrame(mPresShell, &newFrame);
rv = ConstructBlock(aState, aDisplay, aContent,
aState.mFloatedItems.containingBlock, aParentFrame,
aStyleContext, &newFrame, aFrameItems,
aDisplay->mPosition == NS_STYLE_POSITION_RELATIVE);
if (NS_FAILED(rv)) {
return rv;
}
addedToFrameList = PR_TRUE;
}
// See if it's relatively positioned
else if ((NS_STYLE_POSITION_RELATIVE == aDisplay->mPosition) &&
((NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_INLINE == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_LIST_ITEM == aDisplay->mDisplay))) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
// Is it block-level or inline-level?
if ((NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_LIST_ITEM == aDisplay->mDisplay)) {
// Create a wrapper frame. No space manager, though
NS_NewRelativeItemWrapperFrame(mPresShell, &newFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
ConstructBlock(aState, aDisplay, aContent,
aParentFrame, nsnull, aStyleContext, &newFrame,
aFrameItems, PR_TRUE);
addedToFrameList = PR_TRUE;
} else {
// Create a positioned inline frame
NS_NewPositionedInlineFrame(mPresShell, &newFrame);
// Note that we want to insert the inline after processing kids, since
// processing of kids may split the inline.
ConstructInline(aState, aDisplay, aContent,
aParentFrame, aStyleContext, PR_TRUE, newFrame);
}
}
// See if it's a block frame of some sort
else if ((NS_STYLE_DISPLAY_BLOCK == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_LIST_ITEM == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_RUN_IN == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_COMPACT == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_INLINE_BLOCK == aDisplay->mDisplay)) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
// Create the block frame
rv = NS_NewBlockFrame(mPresShell, &newFrame);
if (NS_SUCCEEDED(rv)) { // That worked so construct the block and its children
// XXXbz should we be passing in a non-null aContentParentFrame?
rv = ConstructBlock(aState, aDisplay, aContent,
aParentFrame, nsnull, aStyleContext, &newFrame,
aFrameItems, PR_FALSE);
addedToFrameList = PR_TRUE;
}
}
// See if it's an inline frame of some sort
else if ((NS_STYLE_DISPLAY_INLINE == aDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_MARKER == aDisplay->mDisplay)) {
if (!aHasPseudoParent && !aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
// Create the inline frame
rv = NS_NewInlineFrame(mPresShell, &newFrame);
if (NS_SUCCEEDED(rv)) { // That worked so construct the inline and its children
// Note that we want to insert the inline after processing kids, since
// processing of kids may split the inline.
rv = ConstructInline(aState, aDisplay, aContent,
aParentFrame, aStyleContext, PR_FALSE, newFrame);
}
// To keep the hash table small don't add inline frames (they're
// typically things like FONT and B), because we can quickly
// find them if we need to
addToHashTable = PR_FALSE;
}
// otherwise let the display property influence the frame type to create
else {
// XXX This section now only handles table frames; should be
// factored out probably
// Use the 'display' property to choose a frame type
switch (aDisplay->mDisplay) {
case NS_STYLE_DISPLAY_TABLE:
{
// XXXbz this isn't quite right, but checking for aHasPseudoParent here
// would just lead us to ProcessPseudoFrames inside ConstructTableFrame.
if (!aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
nsIFrame* innerTable;
rv = ConstructTableFrame(aState, aContent,
aParentFrame, aStyleContext,
tableCreator, PR_FALSE, aFrameItems, newFrame,
innerTable);
addedToFrameList = PR_TRUE;
// Note: table construction function takes care of initializing
// the frame, processing children, and setting the initial child
// list
break;
}
// the next 5 cases are only relevant if the parent is not a table, ConstructTableFrame handles children
case NS_STYLE_DISPLAY_TABLE_CAPTION:
{
// aParentFrame may be an inner table frame rather than an outer frame
// In this case we need to get the outer frame.
nsIFrame* parentFrame = aParentFrame;
nsIFrame* outerFrame = aParentFrame->GetParent();
if (outerFrame) {
if (nsLayoutAtoms::tableOuterFrame == outerFrame->GetType()) {
parentFrame = outerFrame;
}
}
rv = ConstructTableCaptionFrame(aState, aContent, parentFrame,
aStyleContext, tableCreator, aFrameItems,
newFrame, aHasPseudoParent);
if (NS_SUCCEEDED(rv) && !aHasPseudoParent) {
aFrameItems.AddChild(newFrame);
}
return rv;
}
case NS_STYLE_DISPLAY_TABLE_ROW_GROUP:
case NS_STYLE_DISPLAY_TABLE_HEADER_GROUP:
case NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP:
rv = ConstructTableRowGroupFrame(aState, aContent,
aParentFrame, aStyleContext, tableCreator,
PR_FALSE, aFrameItems, newFrame, aHasPseudoParent);
if (NS_SUCCEEDED(rv) && !aHasPseudoParent) {
aFrameItems.AddChild(newFrame);
}
return rv;
case NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP:
rv = ConstructTableColGroupFrame(aState, aContent, aParentFrame,
aStyleContext, tableCreator,
PR_FALSE, aFrameItems, newFrame,
aHasPseudoParent);
if (NS_SUCCEEDED(rv) && !aHasPseudoParent) {
aFrameItems.AddChild(newFrame);
}
return rv;
case NS_STYLE_DISPLAY_TABLE_COLUMN:
rv = ConstructTableColFrame(aState, aContent, aParentFrame,
aStyleContext, tableCreator, PR_FALSE,
aFrameItems, newFrame, aHasPseudoParent);
if (NS_SUCCEEDED(rv) && !aHasPseudoParent) {
aFrameItems.AddChild(newFrame);
}
return rv;
case NS_STYLE_DISPLAY_TABLE_ROW:
rv = ConstructTableRowFrame(aState, aContent, aParentFrame,
aStyleContext, tableCreator, PR_FALSE,
aFrameItems, newFrame, aHasPseudoParent);
if (NS_SUCCEEDED(rv) && !aHasPseudoParent) {
aFrameItems.AddChild(newFrame);
}
return rv;
case NS_STYLE_DISPLAY_TABLE_CELL:
{
nsIFrame* innerTable;
rv = ConstructTableCellFrame(aState, aContent, aParentFrame,
aStyleContext, tableCreator,
PR_FALSE, aFrameItems, newFrame,
innerTable, aHasPseudoParent);
if (NS_SUCCEEDED(rv) && !aHasPseudoParent) {
aFrameItems.AddChild(newFrame);
}
return rv;
}
default:
NS_NOTREACHED("How did we get here?");
break;
}
}
if (!addedToFrameList) {
// Gotta do it here
NS_ASSERTION(!aDisplay->IsAbsolutelyPositioned() &&
!aDisplay->IsFloating(),
"Things that could be out-of-flow need to handle adding "
"to the frame list themselves");
rv = aState.AddChild(newFrame, aFrameItems, aDisplay, aContent,
aStyleContext, aParentFrame);
NS_ASSERTION(NS_SUCCEEDED(rv),
"Cases where AddChild() can fail must handle it themselves");
}
if (newFrame) {
rv = CreateInsertionPointChildren(aState, newFrame, aContent);
NS_ENSURE_SUCCESS(rv, rv);
if (addToHashTable) {
// Add a mapping from content object to primary frame. Note that for
// floated and positioned frames this is the out-of-flow frame and not
// the placeholder frame
if (!primaryFrameSet)
aState.mFrameManager->SetPrimaryFrameFor(aContent, newFrame);
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::InitAndRestoreFrame(const nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsStyleContext* aStyleContext,
nsIFrame* aPrevInFlow,
nsIFrame* aNewFrame)
{
nsresult rv = NS_OK;
NS_ASSERTION(aNewFrame, "Null frame cannot be initialized");
if (!aNewFrame)
return NS_ERROR_NULL_POINTER;
// Initialize the frame
rv = aNewFrame->Init(aState.mPresContext, aContent, aParentFrame,
aStyleContext, aPrevInFlow);
if (aState.mFrameState && aState.mFrameManager) {
// Restore frame state for just the newly created frame.
aState.mFrameManager->RestoreFrameStateFor(aNewFrame, aState.mFrameState);
}
return rv;
}
already_AddRefed<nsStyleContext>
nsCSSFrameConstructor::ResolveStyleContext(nsIFrame* aParentFrame,
nsIContent* aContent)
{
// Resolve the style context based on the content object and the parent
// style context
nsStyleContext* parentStyleContext = aParentFrame->GetStyleContext();
// skip past any parents that are scrolled-content. We want to inherit directly
// from the outer scroll frame.
while (parentStyleContext && parentStyleContext->GetPseudoType() ==
nsCSSAnonBoxes::scrolledContent) {
parentStyleContext = parentStyleContext->GetParent();
}
nsStyleSet *styleSet = mPresShell->StyleSet();
if (aContent->IsContentOfType(nsIContent::eELEMENT)) {
return styleSet->ResolveStyleFor(aContent, parentStyleContext);
} else {
NS_ASSERTION(aContent->Tag() == nsLayoutAtoms::textTagName,
"shouldn't waste time creating style contexts for "
"comments and processing instructions");
return styleSet->ResolveStyleForNonElement(parentStyleContext);
}
}
// MathML Mod - RBS
#ifdef MOZ_MATHML
nsresult
nsCSSFrameConstructor::ConstructMathMLFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
PRInt32 aNameSpaceID,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems,
PRBool aHasPseudoParent)
{
// Make sure that we remain confined in the MathML world
if (aNameSpaceID != kNameSpaceID_MathML)
return NS_OK;
PRBool processChildren = PR_TRUE; // Whether we should process child content.
// MathML frames are inline frames.
// processChildren = PR_TRUE for inline frames.
// see case NS_STYLE_DISPLAY_INLINE in
// ConstructFrameByDisplayType()
nsresult rv = NS_OK;
PRBool isReplaced = PR_FALSE;
PRBool ignoreInterTagWhitespace = PR_TRUE;
// XXXbz somewhere here we should process pseudo frames if !aHasPseudoParent
NS_ASSERTION(aTag != nsnull, "null MathML tag");
if (aTag == nsnull)
return NS_OK;
// Initialize the new frame
nsIFrame* newFrame = nsnull;
const nsStyleDisplay* disp = aStyleContext->GetStyleDisplay();
if (aTag == nsMathMLAtoms::mi_ ||
aTag == nsMathMLAtoms::mn_ ||
aTag == nsMathMLAtoms::ms_ ||
aTag == nsMathMLAtoms::mtext_)
rv = NS_NewMathMLTokenFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::mo_)
rv = NS_NewMathMLmoFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::mfrac_)
rv = NS_NewMathMLmfracFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::msup_)
rv = NS_NewMathMLmsupFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::msub_)
rv = NS_NewMathMLmsubFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::msubsup_)
rv = NS_NewMathMLmsubsupFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::munder_)
rv = NS_NewMathMLmunderFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::mover_)
rv = NS_NewMathMLmoverFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::munderover_)
rv = NS_NewMathMLmunderoverFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::mphantom_)
rv = NS_NewMathMLmphantomFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::mpadded_)
rv = NS_NewMathMLmpaddedFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::mspace_)
rv = NS_NewMathMLmspaceFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::mfenced_)
rv = NS_NewMathMLmfencedFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::mmultiscripts_)
rv = NS_NewMathMLmmultiscriptsFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::mstyle_)
rv = NS_NewMathMLmstyleFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::msqrt_)
rv = NS_NewMathMLmsqrtFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::mroot_)
rv = NS_NewMathMLmrootFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::maction_)
rv = NS_NewMathMLmactionFrame(mPresShell, &newFrame);
else if (aTag == nsMathMLAtoms::mrow_ ||
aTag == nsMathMLAtoms::merror_ ||
aTag == nsMathMLAtoms::none_ ||
aTag == nsMathMLAtoms::mprescripts_ )
rv = NS_NewMathMLmrowFrame(mPresShell, &newFrame);
// CONSTRUCTION of MTABLE elements
else if (aTag == nsMathMLAtoms::mtable_ &&
disp->mDisplay == NS_STYLE_DISPLAY_TABLE) {
// <mtable> is an inline-table -- but this isn't yet supported.
// What we do here is to wrap the table in an anonymous containing
// block so that it can mix better with other surrounding MathML markups
// XXXbz this is wrong if the <mtable> is positioned or floated.
nsStyleContext* parentContext = aParentFrame->GetStyleContext();
nsStyleSet *styleSet = mPresShell->StyleSet();
// first, create a MathML mrow frame that will wrap the block frame
rv = NS_NewMathMLmrowFrame(mPresShell, &newFrame);
if (NS_FAILED(rv)) return rv;
nsRefPtr<nsStyleContext> mrowContext;
mrowContext = styleSet->ResolvePseudoStyleFor(aContent,
nsCSSAnonBoxes::mozMathInline,
parentContext);
InitAndRestoreFrame(aState, aContent, aParentFrame, mrowContext, nsnull,
newFrame);
// then, create a block frame that will wrap the table frame
nsIFrame* blockFrame;
rv = NS_NewBlockFrame(mPresShell, &blockFrame);
if (NS_FAILED(rv)) return rv;
nsRefPtr<nsStyleContext> blockContext;
blockContext = styleSet->ResolvePseudoStyleFor(aContent,
nsCSSAnonBoxes::mozAnonymousBlock,
mrowContext);
InitAndRestoreFrame(aState, aContent, newFrame, blockContext, nsnull,
blockFrame);
// then, create the table frame itself
nsRefPtr<nsStyleContext> tableContext;
tableContext = styleSet->ResolveStyleFor(aContent, blockContext);
nsFrameItems tempItems;
nsIFrame* outerTable;
nsIFrame* innerTable;
nsMathMLmtableCreator mathTableCreator(mPresShell);
rv = ConstructTableFrame(aState, aContent, blockFrame, tableContext,
mathTableCreator, PR_FALSE, tempItems, outerTable,
innerTable);
// Note: table construction function takes care of initializing the frame,
// processing children, and setting the initial child list
// set the outerTable as the initial child of the anonymous block
blockFrame->SetInitialChildList(aState.mPresContext, nsnull, outerTable);
// set the block frame as the initial child of the mrow frame
newFrame->SetInitialChildList(aState.mPresContext, nsnull, blockFrame);
// add the new frame to the flow
// XXXbz this is wrong. What if it's out-of-flow? For that matter, this
// is putting the frame in the wrong child list in the "pseudoParent ==
// PR_TRUE" case, which I assume we can hit.
aFrameItems.AddChild(newFrame);
return rv;
}
// End CONSTRUCTION of MTABLE elements
else if (aTag == nsMathMLAtoms::math) {
// root <math> element
const nsStyleDisplay* display = aStyleContext->GetStyleDisplay();
PRBool isBlock = (NS_STYLE_DISPLAY_BLOCK == display->mDisplay);
rv = NS_NewMathMLmathFrame(mPresShell, &newFrame, isBlock);
}
else {
return rv;
}
// If we succeeded in creating a frame then initialize it, process its
// children (if requested), and set the initial child list
if (NS_SUCCEEDED(rv) && newFrame) {
// If the frame is a replaced element, then set the frame state bit
if (isReplaced) {
newFrame->AddStateBits(NS_FRAME_REPLACED_ELEMENT);
}
// record that children that are ignorable whitespace should be excluded
if (ignoreInterTagWhitespace) {
newFrame->AddStateBits(NS_FRAME_EXCLUDE_IGNORABLE_WHITESPACE);
}
InitAndRestoreFrame(aState, aContent,
aState.GetGeometricParent(disp, aParentFrame),
aStyleContext, nsnull, newFrame);
// See if we need to create a view, e.g. the frame is absolutely positioned
nsHTMLContainerFrame::CreateViewForFrame(newFrame, aParentFrame, PR_FALSE);
rv = aState.AddChild(newFrame, aFrameItems, disp, aContent, aStyleContext,
aParentFrame);
if (NS_FAILED(rv)) {
return rv;
}
// Process the child content if requested
nsFrameItems childItems;
if (processChildren) {
rv = ProcessChildren(aState, aContent, newFrame, PR_TRUE,
childItems, PR_FALSE);
CreateAnonymousFrames(aTag, aState, aContent, newFrame, PR_FALSE,
childItems);
}
// Set the frame's initial child list
newFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
rv = CreateInsertionPointChildren(aState, newFrame, aContent);
}
return rv;
}
#endif // MOZ_MATHML
// XTF
#ifdef MOZ_XTF
nsresult
nsCSSFrameConstructor::ConstructXTFFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
PRInt32 aNameSpaceID,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems,
PRBool aHasPseudoParent)
{
#ifdef DEBUG
// printf("nsCSSFrameConstructor::ConstructXTFFrame\n");
#endif
nsresult rv = NS_OK;
PRBool forceView = PR_FALSE;
PRBool isBlock = PR_FALSE;
// XXXbz somewhere here we should process pseudo frames if !aHasPseudoParent
//NS_ASSERTION(aTag != nsnull, "null XTF tag");
//if (aTag == nsnull)
// return NS_OK;
// Initialize the new frame
nsIFrame* newFrame = nsnull;
// See if the element is absolute or fixed positioned
const nsStyleDisplay* disp = aStyleContext->GetStyleDisplay();
nsCOMPtr<nsIXTFElementWrapperPrivate> xtfElem = do_QueryInterface(aContent);
NS_ASSERTION(xtfElem, "huh? no xtf element?");
switch(xtfElem->GetElementType()) {
case nsIXTFElement::ELEMENT_TYPE_SVG_VISUAL:
#ifdef MOZ_SVG
rv = NS_NewXTFSVGDisplayFrame(mPresShell, aContent, &newFrame);
#else
NS_ERROR("xtf svg visuals are only supported in mozilla builds with native svg");
#endif
break;
case nsIXTFElement::ELEMENT_TYPE_XML_VISUAL:
{
PRBool isBlock = (NS_STYLE_DISPLAY_BLOCK == disp->mDisplay);
rv = NS_NewXTFXMLDisplayFrame(mPresShell, isBlock, &newFrame);
}
break;
case nsIXTFElement::ELEMENT_TYPE_XUL_VISUAL:
rv = NS_NewXTFXULDisplayFrame(mPresShell, &newFrame);
break;
case nsIXTFElement::ELEMENT_TYPE_GENERIC_ELEMENT:
NS_ERROR("huh? ELEMENT_TYPE_GENERIC_ELEMENT should have been flagged by caller");
break;
default:
NS_ERROR("unknown xtf frame!");
return NS_OK;
}
// If we succeeded in creating a frame then initialize it, process its
// children (if requested), and set the initial child list
if (NS_SUCCEEDED(rv) && newFrame != nsnull) {
InitAndRestoreFrame(aState, aContent,
aState.GetGeometricParent(disp, aParentFrame),
aStyleContext, nsnull, newFrame);
nsHTMLContainerFrame::CreateViewForFrame(newFrame, aParentFrame, forceView);
rv = aState.AddChild(newFrame, aFrameItems, disp, aContent, aStyleContext,
aParentFrame);
if (NS_FAILED(rv)) {
return rv;
}
// Get the content node in the anonymous content tree where the explicit
// children should be inserted.
nsCOMPtr<nsIContent> insertionNode = newFrame->GetContentInsertionNode();
// Create anonymous frames before processing children, so that
// explicit child content can be appended to the correct anonymous
// frame. Call version of CreateAnonymousFrames that doesn't check
// tag:
nsCOMPtr<nsIXTFVisualWrapperPrivate> visual = do_QueryInterface(xtfElem);
NS_ASSERTION(visual,
"xtf wrapper not implementing nsIXTFVisualWrapperPrivate");
nsFrameItems childItems;
// Since we've set the insertion frame, our children will automatically
// be constructed once |insertionNode| has had its frame created.
// Call version of CreateAnonymousFrames that doesn't check tag:
CreateAnonymousFrames(aState, aContent, mDocument, newFrame,
visual->ApplyDocumentStyleSheets(),
PR_FALSE, childItems,
newFrame, insertionNode, isBlock);
// Set the frame's initial child list
newFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
// Note: we don't worry about insertionFrame here because we know
// that XTF elements always insert into the primary frame of their
// insertion content.
rv = CreateInsertionPointChildren(aState, newFrame, aContent, PR_FALSE);
}
return rv;
}
#endif // MOZ_XTF
// SVG
#ifdef MOZ_SVG
nsresult
nsCSSFrameConstructor::TestSVGConditions(nsIContent* aContent,
PRBool& aHasRequiredExtensions,
PRBool& aHasRequiredFeatures,
PRBool& aHasSystemLanguage)
{
nsresult rv = NS_OK;
nsAutoString value;
// Only elements can have tests on them
if (! aContent->IsContentOfType(nsIContent::eELEMENT)) {
aHasRequiredExtensions = PR_FALSE;
aHasRequiredFeatures = PR_FALSE;
aHasSystemLanguage = PR_FALSE;
return rv;
}
// Required Extensions
//
// The requiredExtensions attribute defines a list of required language
// extensions. Language extensions are capabilities within a user agent that
// go beyond the feature set defined in the SVG specification.
// Each extension is identified by a URI reference.
rv = aContent->GetAttr(kNameSpaceID_None, nsSVGAtoms::requiredExtensions, value);
if (NS_FAILED(rv))
return rv;
aHasRequiredExtensions = PR_TRUE;
if (NS_CONTENT_ATTR_HAS_VALUE == rv) {
// For now, claim that mozilla's SVG implementation supports
// no extensions. So, if extensions are required, we don't have
// them available.
aHasRequiredExtensions = PR_FALSE;
}
// Required Features
aHasRequiredFeatures = PR_TRUE;
rv = aContent->GetAttr(kNameSpaceID_None, nsSVGAtoms::requiredFeatures, value);
if (NS_FAILED(rv))
return rv;
if (NS_CONTENT_ATTR_HAS_VALUE == rv) {
aHasRequiredFeatures = NS_SVG_TestFeatures(value);
}
// systemLanguage
//
// Evaluates to "true" if one of the languages indicated by user preferences
// exactly equals one of the languages given in the value of this parameter,
// or if one of the languages indicated by user preferences exactly equals a
// prefix of one of the languages given in the value of this parameter such
// that the first tag character following the prefix is "-".
aHasSystemLanguage = PR_TRUE;
rv = aContent->GetAttr(kNameSpaceID_None, nsSVGAtoms::systemLanguage, value);
if (NS_CONTENT_ATTR_HAS_VALUE == rv) {
// Get our language preferences
nsAutoString langPrefs(nsContentUtils::GetLocalizedStringPref("intl.accept_languages"));
if (!langPrefs.IsEmpty()) {
langPrefs.StripWhitespace();
value.StripWhitespace();
#ifdef DEBUG_scooter
printf("Calling SVG_TestLanguage('%s','%s')\n", NS_ConvertUCS2toUTF8(value).get(),
NS_ConvertUCS2toUTF8(langPrefs).get());
#endif
aHasSystemLanguage = SVG_TestLanguage(value, langPrefs);
} else {
// For now, evaluate to true.
NS_WARNING("no default language specified for systemLanguage conditional test");
aHasSystemLanguage = PR_TRUE;
}
return NS_OK;
}
return rv;
}
nsresult
nsCSSFrameConstructor::SVGSwitchProcessChildren(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aFrame,
nsFrameItems& aFrameItems)
{
nsresult rv = NS_OK;
PRBool isFinished = PR_FALSE;
PRBool hasRequiredExtensions = PR_FALSE;
PRBool hasRequiredFeatures = PR_FALSE;
PRBool hasSystemLanguage = PR_FALSE;
// save the incoming pseudo frame state
nsPseudoFrames priorPseudoFrames;
aState.mPseudoFrames.Reset(&priorPseudoFrames);
// The 'switch' element evaluates the requiredFeatures,
// requiredExtensions and systemLanguage attributes on its direct child
// elements in order, and then processes and renders the first child for
// which these attributes evaluate to true. All others will be bypassed and
// therefore not rendered.
ChildIterator iter, last;
for (ChildIterator::Init(aContent, &iter, &last);
(iter != last) && (! isFinished);
++iter) {
nsCOMPtr<nsIContent> child(*iter);
rv = TestSVGConditions(child,
hasRequiredExtensions,
hasRequiredFeatures,
hasSystemLanguage);
#ifdef DEBUG_scooter
printf("SwitchProcessChildren: Required Extentions = %s, Required Features = %s, System Language = %s\n",
hasRequiredExtensions ? "true" : "false",
hasRequiredFeatures ? "true" : "false",
hasSystemLanguage ? "true" : "false");
#endif
if (NS_FAILED(rv))
return rv;
if (hasRequiredExtensions &&
hasRequiredFeatures &&
hasSystemLanguage) {
rv = ConstructFrame(aState, nsCOMPtr<nsIContent>(*iter),
aFrame, aFrameItems);
if (NS_FAILED(rv))
return rv;
if (child->IsContentOfType(nsIContent::eELEMENT)) {
break;
}
}
}
// process the current pseudo frame state
if (!aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
// restore the incoming pseudo frame state
aState.mPseudoFrames = priorPseudoFrames;
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructSVGFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
PRInt32 aNameSpaceID,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems,
PRBool aHasPseudoParent)
{
NS_ASSERTION(aNameSpaceID == kNameSpaceID_SVG, "SVG frame constructed in wrong namespace");
nsresult rv = NS_OK;
PRBool forceView = PR_FALSE;
PRBool processChildren = PR_FALSE;
PRBool isOuterSVGNode = PR_FALSE;
const nsStyleDisplay* disp = aStyleContext->GetStyleDisplay();
NS_ASSERTION(aTag != nsnull, "null SVG tag");
if (aTag == nsnull)
return NS_OK;
// XXXbz somewhere here we should process pseudo frames if !aHasPseudoParent
// Initialize the new frame
nsIFrame* newFrame = nsnull;
//nsSVGTableCreator svgTableCreator(mPresShell); // Used to make table views.
// Default to aParentFrame for the geometricParent; it's adjusted in
// cases when we allow anything else.
nsIFrame* geometricParent = aParentFrame;
if (aTag == nsSVGAtoms::svg) {
nsCOMPtr<nsISVGContainerFrame> container = do_QueryInterface(aParentFrame);
processChildren = PR_TRUE;
if (!container) {
// This is the outermost <svg> element.
isOuterSVGNode = PR_TRUE;
// Set the right geometricParent
geometricParent = aState.GetGeometricParent(disp, aParentFrame);
forceView = PR_TRUE;
rv = NS_NewSVGOuterSVGFrame(mPresShell, aContent, &newFrame);
}
else {
// This is an inner <svg> element
rv = NS_NewSVGInnerSVGFrame(mPresShell, aContent, &newFrame);
}
}
else if (aTag == nsSVGAtoms::g) {
processChildren = PR_TRUE;
rv = NS_NewSVGGFrame(mPresShell, aContent, &newFrame);
}
else if (aTag == nsSVGAtoms::polygon)
rv = NS_NewSVGPolygonFrame(mPresShell, aContent, &newFrame);
else if (aTag == nsSVGAtoms::polyline)
rv = NS_NewSVGPolylineFrame(mPresShell, aContent, &newFrame);
else if (aTag == nsSVGAtoms::circle)
rv = NS_NewSVGCircleFrame(mPresShell, aContent, &newFrame);
else if (aTag == nsSVGAtoms::defs) {
processChildren = PR_TRUE;
rv = NS_NewSVGDefsFrame(mPresShell, aContent, &newFrame);
}
else if (aTag == nsSVGAtoms::ellipse)
rv = NS_NewSVGEllipseFrame(mPresShell, aContent, &newFrame);
else if (aTag == nsSVGAtoms::line)
rv = NS_NewSVGLineFrame(mPresShell, aContent, &newFrame);
else if (aTag == nsSVGAtoms::rect)
rv = NS_NewSVGRectFrame(mPresShell, aContent, &newFrame);
else if (aTag == nsSVGAtoms::foreignObject) {
processChildren = PR_TRUE;
rv = NS_NewSVGForeignObjectFrame(mPresShell, aContent, &newFrame);
}
else if (aTag == nsSVGAtoms::path)
rv = NS_NewSVGPathFrame(mPresShell, aContent, &newFrame);
else if (aTag == nsSVGAtoms::text) {
processChildren = PR_TRUE;
rv = NS_NewSVGTextFrame(mPresShell, aContent, &newFrame);
}
else if (aTag == nsSVGAtoms::tspan) {
processChildren = PR_TRUE;
rv = NS_NewSVGTSpanFrame(mPresShell, aContent, aParentFrame, &newFrame);
}
else if (aTag == nsSVGAtoms::linearGradient) {
processChildren = PR_TRUE;
rv = NS_NewSVGLinearGradientFrame(mPresShell, aContent, &newFrame);
}
else if (aTag == nsSVGAtoms::radialGradient) {
processChildren = PR_TRUE;
rv = NS_NewSVGRadialGradientFrame(mPresShell, aContent, &newFrame);
}
else if (aTag == nsSVGAtoms::stop) {
rv = NS_NewSVGStopFrame(mPresShell, aContent, aParentFrame, &newFrame);
}
else if (aTag == nsSVGAtoms::use) {
processChildren = PR_TRUE;
rv = NS_NewSVGUseFrame(mPresShell, aContent, &newFrame);
}
else if (aTag == nsSVGAtoms::marker) {
processChildren = PR_TRUE;
rv = NS_NewSVGMarkerFrame(mPresShell, aContent, &newFrame);
}
else if (aTag == nsSVGAtoms::image) {
rv = NS_NewSVGImageFrame(mPresShell, aContent, &newFrame);
}
else if (aTag == nsSVGAtoms::clipPath) {
processChildren = PR_TRUE;
rv = NS_NewSVGClipPathFrame(mPresShell, aContent, &newFrame);
}
if (newFrame == nsnull) {
// Either we have an unknown tag, or construction of a frame
// failed. One reason why frame construction for a known tag might
// have failed is that the content element doesn't implement all
// interfaces required by the frame. This happens e.g. when using
// 'extends' in xbl to extend an xbl binding from an svg
// element. In that case, the bound content element will always be
// a standard xml element, and not be of the right type.
// The best we can do here is to create a generic svg container frame.
#ifdef DEBUG
// printf("Warning: Creating SVGGenericContainerFrame for tag <");
// nsAutoString str;
// aTag->ToString(str);
// printf("%s>\n", NS_ConvertUCS2toUTF8(str).get());
#endif
processChildren = PR_TRUE;
rv = NS_NewSVGGenericContainerFrame(mPresShell, aContent, &newFrame);
}
// If we succeeded in creating a frame then initialize it, process its
// children (if requested), and set the initial child list
if (NS_SUCCEEDED(rv) && newFrame != nsnull) {
if (aTag == nsSVGAtoms::foreignObject) {
// Claim to be relatively positioned so that we end up being the
// absolute containing block. Also, push "null" as the floater
// containing block so that we get the SPACE_MGR bit set.
nsFrameConstructorSaveState saveState;
aState.PushFloatContainingBlock(nsnull, saveState, PR_FALSE, PR_FALSE);
const nsStyleDisplay* disp = aStyleContext->GetStyleDisplay();
rv = ConstructBlock(aState, disp, aContent,
geometricParent, aParentFrame, aStyleContext,
&newFrame, aFrameItems, PR_TRUE);
} else {
InitAndRestoreFrame(aState, aContent, geometricParent, aStyleContext,
nsnull, newFrame);
rv = aState.AddChild(newFrame, aFrameItems, disp, aContent, aStyleContext,
aParentFrame, isOuterSVGNode, isOuterSVGNode);
if (NS_FAILED(rv)) {
return rv;
}
nsHTMLContainerFrame::CreateViewForFrame(newFrame, aParentFrame, forceView);
// Process the child content if requested
nsFrameItems childItems;
if (processChildren) {
if (aTag == nsSVGAtoms::svgSwitch) {
rv = SVGSwitchProcessChildren(aState, aContent, newFrame,
childItems);
} else {
rv = ProcessChildren(aState, aContent, newFrame, PR_TRUE, childItems,
PR_FALSE);
}
CreateAnonymousFrames(aTag, aState, aContent, newFrame,
PR_FALSE, childItems);
}
// Set the frame's initial child list
newFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
}
rv = CreateInsertionPointChildren(aState, newFrame, aContent);
}
return rv;
}
#endif // MOZ_SVG
PRBool
nsCSSFrameConstructor::PageBreakBefore(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems)
{
const nsStyleDisplay* display = aStyleContext->GetStyleDisplay();
// See if page-break-before is set for all elements except row groups, rows, cells
// (these are handled internally by tables) and construct a page break frame if so.
if (NS_STYLE_DISPLAY_NONE != display->mDisplay &&
(NS_STYLE_DISPLAY_TABLE == display->mDisplay ||
!IsTableRelated(display->mDisplay, PR_TRUE))) {
if (display->mBreakBefore) {
ConstructPageBreakFrame(aState, aContent, aParentFrame, aStyleContext,
aFrameItems);
}
return display->mBreakAfter;
}
return PR_FALSE;
}
nsresult
nsCSSFrameConstructor::ConstructPageBreakFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems)
{
nsRefPtr<nsStyleContext> pseudoStyle;
pseudoStyle = mPresShell->StyleSet()->ResolvePseudoStyleFor(nsnull,
nsCSSAnonBoxes::pageBreak,
aStyleContext);
nsIFrame* pageBreakFrame;
nsresult rv = NS_NewPageBreakFrame(mPresShell, &pageBreakFrame);
if (NS_SUCCEEDED(rv)) {
InitAndRestoreFrame(aState, aContent, aParentFrame, pseudoStyle, nsnull,
pageBreakFrame);
aFrameItems.AddChild(pageBreakFrame);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructFrame(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsFrameItems& aFrameItems)
{
NS_PRECONDITION(nsnull != aParentFrame, "no parent frame");
nsresult rv = NS_OK;
// don't create a whitespace frame if aParent doesn't want it
if (!NeedFrameFor(aParentFrame, aContent)) {
return rv;
}
// Get the element's tag
nsIAtom *tag = aContent->Tag();
// never create frames for comments on PIs
if (tag == nsLayoutAtoms::commentTagName ||
tag == nsLayoutAtoms::processingInstructionTagName)
return rv;
nsRefPtr<nsStyleContext> styleContext;
styleContext = ResolveStyleContext(aParentFrame, aContent);
PRBool pageBreakAfter = PR_FALSE;
if (aState.mPresContext->IsPaginated()) {
// See if there is a page break before, if so construct one. Also see if there is one after
pageBreakAfter = PageBreakBefore(aState, aContent, aParentFrame,
styleContext, aFrameItems);
}
// construct the frame
rv = ConstructFrameInternal(aState, aContent, aParentFrame,
tag, aContent->GetNameSpaceID(), styleContext,
aFrameItems, PR_FALSE);
if (NS_SUCCEEDED(rv) && pageBreakAfter) {
// Construct the page break after
ConstructPageBreakFrame(aState, aContent, aParentFrame, styleContext,
aFrameItems);
}
return rv;
}
nsresult
nsCSSFrameConstructor::ConstructFrameInternal( nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIAtom* aTag,
PRInt32 aNameSpaceID,
nsStyleContext* aStyleContext,
nsFrameItems& aFrameItems,
PRBool aXBLBaseTag)
{
// The following code allows the user to specify the base tag
// of an element using XBL. XUL and HTML objects (like boxes, menus, etc.)
// can then be extended arbitrarily.
const nsStyleDisplay* display = aStyleContext->GetStyleDisplay();
nsRefPtr<nsStyleContext> styleContext(aStyleContext);
nsAutoEnqueueBinding binding(mDocument);
if (!aXBLBaseTag)
{
// Ensure that our XBL bindings are installed.
if (display->mBinding) {
// Get the XBL loader.
nsresult rv;
// Load the bindings.
PRBool resolveStyle;
nsIXBLService * xblService = GetXBLService();
if (!xblService)
return NS_ERROR_FAILURE;
rv = xblService->LoadBindings(aContent, display->mBinding, PR_FALSE,
getter_AddRefs(binding.mBinding),
&resolveStyle);
if (NS_FAILED(rv))
return NS_OK;
if (resolveStyle) {
styleContext = ResolveStyleContext(aParentFrame, aContent);
display = styleContext->GetStyleDisplay();
}
nsCOMPtr<nsIAtom> baseTag;
PRInt32 nameSpaceID;
xblService->ResolveTag(aContent, &nameSpaceID, getter_AddRefs(baseTag));
if (baseTag != aTag || aNameSpaceID != nameSpaceID) {
// Construct the frame using the XBL base tag.
rv = ConstructFrameInternal(aState,
aContent,
aParentFrame,
baseTag,
nameSpaceID,
styleContext,
aFrameItems,
PR_TRUE);
return rv;
}
}
}
// Pre-check for display "none" - if we find that, don't create
// any frame at all
if (NS_STYLE_DISPLAY_NONE == display->mDisplay) {
aState.mFrameManager->SetUndisplayedContent(aContent, styleContext);
return NS_OK;
}
nsIFrame* adjParentFrame = aParentFrame;
nsFrameItems* frameItems = &aFrameItems;
PRBool pseudoParent = PR_FALSE;
nsFrameConstructorSaveState pseudoSaveState;
nsresult rv = AdjustParentFrame(aContent, display, adjParentFrame,
frameItems, aState, pseudoSaveState,
pseudoParent);
if (NS_FAILED(rv)) {
return rv;
}
if (aContent->IsContentOfType(nsIContent::eTEXT))
return ConstructTextFrame(aState, aContent, adjParentFrame, styleContext,
*frameItems, pseudoParent);
// Style resolution can normally happen lazily. However, getting the
// Visibility struct can cause |SetBidiEnabled| to be called on the
// pres context, and this needs to happen before we start reflow, so
// do it now, when constructing frames. See bug 115921.
{
styleContext->GetStyleVisibility();
}
nsIFrame* lastChild = frameItems->lastChild;
// Handle specific frame types
rv = ConstructHTMLFrame(aState, aContent, adjParentFrame, aTag, aNameSpaceID,
styleContext, *frameItems, pseudoParent);
// Failing to find a matching HTML frame, try creating a specialized
// XUL frame. This is temporary, pending planned factoring of this
// whole process into separate, pluggable steps.
if (NS_SUCCEEDED(rv) &&
(!frameItems->childList || lastChild == frameItems->lastChild)) {
PRBool haltProcessing = PR_FALSE;
rv = ConstructXULFrame(aState, aContent, adjParentFrame, aTag,
aNameSpaceID, styleContext,
*frameItems, aXBLBaseTag, pseudoParent,
haltProcessing);
if (haltProcessing) {
return rv;
}
}
// MathML Mod - RBS
#ifdef MOZ_MATHML
if (NS_SUCCEEDED(rv) &&
(!frameItems->childList || lastChild == frameItems->lastChild)) {
rv = ConstructMathMLFrame(aState, aContent, adjParentFrame, aTag,
aNameSpaceID, styleContext, *frameItems,
pseudoParent);
}
#endif
// SVG
#ifdef MOZ_SVG
if (NS_SUCCEEDED(rv) &&
(!frameItems->childList || lastChild == frameItems->lastChild) &&
aNameSpaceID == kNameSpaceID_SVG &&
SVGEnabled()) {
rv = ConstructSVGFrame(aState, aContent, adjParentFrame, aTag,
aNameSpaceID, styleContext,
*frameItems, pseudoParent);
}
#endif
// XTF
#ifdef MOZ_XTF
if (aNameSpaceID > kNameSpaceID_LastBuiltin &&
NS_SUCCEEDED(rv) &&
(!frameItems->childList || lastChild == frameItems->lastChild)) {
nsCOMPtr<nsIXTFElementWrapperPrivate> xtfElem = do_QueryInterface(aContent);
if (xtfElem) {
if (xtfElem->GetElementType() == nsIXTFElement::ELEMENT_TYPE_GENERIC_ELEMENT) {
// we don't build frames for generic elements, only for visuals
// XXXbz this is bogus, really. These kids should just have
// display:none, so they don't mess with pseudo-state!
aState.mFrameManager->SetUndisplayedContent(aContent, styleContext);
return NS_OK;
} else
rv = ConstructXTFFrame(aState, aContent, adjParentFrame, aTag,
aNameSpaceID, styleContext, *frameItems,
pseudoParent);
}
}
#endif
if (NS_SUCCEEDED(rv) &&
(!frameItems->childList || lastChild == frameItems->lastChild)) {
// When there is no explicit frame to create, assume it's a
// container and let display style dictate the rest
rv = ConstructFrameByDisplayType(aState, display, aContent, aNameSpaceID,
aTag, adjParentFrame, styleContext,
*frameItems, pseudoParent);
}
return rv;
}
inline PRBool
IsRootBoxFrame(nsIFrame *aFrame)
{
return (aFrame->GetType() == nsLayoutAtoms::rootFrame);
}
nsresult
nsCSSFrameConstructor::ReconstructDocElementHierarchy()
{
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::ReconstructDocElementHierarchy\n");
}
#endif
nsresult rv = NS_OK;
// XXXbz is that null-check needed? Why?
if (mDocument && mPresShell) {
nsIContent *rootContent = mDocument->GetRootContent();
if (rootContent) {
// Before removing the frames associated with the content object, ask them to save their
// state onto a temporary state object.
CaptureStateForFramesOf(rootContent, mTempFrameTreeState);
nsFrameConstructorState state(mPresShell, mFixedContainingBlock,
nsnull, nsnull, mTempFrameTreeState);
// Get the frame that corresponds to the document element
nsIFrame* docElementFrame =
state.mFrameManager->GetPrimaryFrameFor(rootContent);
// Remove any existing fixed items: they are always on the
// FixedContainingBlock. Note that this has to be done before we call
// ClearPlaceholderFrameMap(), since RemoveFixedItems uses the
// placeholder frame map.
rv = RemoveFixedItems(state);
if (NS_SUCCEEDED(rv)) {
// Clear the hash tables that map from content to frame and out-of-flow
// frame to placeholder frame
state.mFrameManager->ClearPrimaryFrameMap();
state.mFrameManager->ClearPlaceholderFrameMap();
state.mFrameManager->ClearUndisplayedContentMap();
// Take the docElementFrame, and remove it from its parent. For
// HTML, we'll be removing the Area frame from the Canvas; for
// XUL, we'll remove the GfxScroll or Box from the RootBoxFrame.
//
// The three possible structures (at least the ones observed so
// far, see bugs 70258 and 93558) are:
//
// (HTML)
// nsHTMLScrollFrame(html)<
// nsScrollBoxFrame(html)<
// Canvas(-1)<
// Area(html)<
// (etc.)
//
// (XUL #1)
// RootBoxFrame(window)<
// nsXULScrollFrame<
// nsScrollBoxFrame(window)<
// (etc.)
//
// (XUL #2)
// RootBox<
// Box<
// (etc.)
//
if (docElementFrame) {
nsIFrame* docParentFrame = docElementFrame->GetParent();
#ifdef MOZ_XUL
// If we're in a XUL document, then we need to crawl up to the
// RootBoxFrame and remove _its_ child.
nsCOMPtr<nsIXULDocument> xuldoc = do_QueryInterface(mDocument);
if (xuldoc) {
nsCOMPtr<nsIAtom> frameType;
while (docParentFrame && !IsRootBoxFrame(docParentFrame)) {
docElementFrame = docParentFrame;
docParentFrame = docParentFrame->GetParent();
}
}
#endif
NS_ASSERTION(docParentFrame, "should have a parent frame");
if (docParentFrame) {
// Remove the old document element hieararchy
rv = state.mFrameManager->RemoveFrame(docParentFrame, nsnull,
docElementFrame);
if (NS_SUCCEEDED(rv)) {
// Create the new document element hierarchy
nsIFrame* newChild;
rv = ConstructDocElementFrame(state, rootContent,
docParentFrame, &newChild);
if (NS_SUCCEEDED(rv)) {
rv = state.mFrameManager->InsertFrames(docParentFrame, nsnull,
nsnull, newChild);
}
}
}
}
}
}
}
return rv;
}
nsIFrame*
nsCSSFrameConstructor::GetFrameFor(nsIContent* aContent)
{
// Get the primary frame associated with the content
nsIFrame* frame;
mPresShell->GetPrimaryFrameFor(aContent, &frame);
if (!frame)
return nsnull;
return frame->GetContentInsertionFrame();
}
nsIFrame*
nsCSSFrameConstructor::GetAbsoluteContainingBlock(nsIFrame* aFrame)
{
NS_PRECONDITION(nsnull != mInitialContainingBlock, "no initial containing block");
// Starting with aFrame, look for a frame that is absolutely positioned or
// relatively positioned
nsIFrame* containingBlock = nsnull;
for (nsIFrame* frame = aFrame; frame; frame = frame->GetParent()) {
// Is it positioned?
// If it's a table then ignore it, because for the time being tables
// are not containers for absolutely positioned child frames
const nsStyleDisplay* disp = frame->GetStyleDisplay();
if (disp->IsPositioned() && disp->mDisplay != NS_STYLE_DISPLAY_TABLE) {
nsIAtom* frameType = frame->GetType();
if (nsLayoutAtoms::scrollFrame == frameType) {
// We want the scrolled frame, not either of the two scroll frames
nsIFrame* scrolledFrame = frame->GetFirstChild(nsnull);
if (scrolledFrame) {
frameType = scrolledFrame->GetType();
if (nsLayoutAtoms::areaFrame == frameType) {
containingBlock = scrolledFrame;
break;
} else if (nsLayoutAtoms::scrollFrame == frameType) {
scrolledFrame = scrolledFrame->GetFirstChild(nsnull);
if (scrolledFrame) {
if (nsLayoutAtoms::areaFrame == scrolledFrame->GetType()) {
containingBlock = scrolledFrame;
break;
}
}
}
}
} else if ((nsLayoutAtoms::areaFrame == frameType) ||
(nsLayoutAtoms::positionedInlineFrame == frameType)) {
containingBlock = frame;
break;
} else if (nsLayoutAtoms::fieldSetFrame == frameType) {
// If the positioned frame is a fieldset, use the area frame inside it
containingBlock = frame->GetFirstChild(nsnull);
break;
}
#ifdef DEBUG
else {
NS_WARNING("Positioned frame that does not handle positioned kids; looking further up the parent chain");
}
#endif
}
}
// If we found an absolutely positioned containing block, then use the first-in-flow if
// it is a positioned inline. If we didn't find it, then use the initial containing block.
return (containingBlock) ?
AdjustAbsoluteContainingBlock(mPresShell->GetPresContext(),
containingBlock) :
mInitialContainingBlock;
}
nsIFrame*
nsCSSFrameConstructor::GetFloatContainingBlock(nsIFrame* aFrame)
{
NS_PRECONDITION(mInitialContainingBlock, "no initial containing block");
// Starting with aFrame, look for a frame that is a real block frame
// XXXbz some frames are float containing blocks but not "real block frames".
// Perhaps we need to make more use of GetContentInsertionFrame() somewhere?
nsIFrame* containingBlock = aFrame;
while (nsnull != containingBlock) {
const nsStyleDisplay* display = containingBlock->GetStyleDisplay();
if ((NS_STYLE_DISPLAY_BLOCK == display->mDisplay) ||
(NS_STYLE_DISPLAY_LIST_ITEM == display->mDisplay)) {
break;
}
// Continue walking up the hierarchy
containingBlock = containingBlock->GetParent();
}
// If we didn't find a containing block, then use the initial
// containing block
if (nsnull == containingBlock) {
containingBlock = mInitialContainingBlock;
}
return containingBlock;
}
/**
* This function is called by ContentAppended() and ContentInserted()
* when appending flowed frames to a parent's principal child list. It
* handles the case where the parent frame has :after pseudo-element
* generated content.
*/
nsresult
nsCSSFrameConstructor::AppendFrames(const nsFrameConstructorState& aState,
nsIContent* aContainer,
nsIFrame* aParentFrame,
nsIFrame* aFrameList)
{
// See if the parent has an :after pseudo-element. Check for the presence
// of style first, since nsLayoutUtils::GetAfterFrame is sorta expensive.
nsStyleContext* parentStyle = aParentFrame->GetStyleContext();
nsFrameManager* frameManager = aState.mFrameManager;
if (nsLayoutUtils::HasPseudoStyle(aContainer, parentStyle,
nsCSSPseudoElements::after,
aState.mPresContext)) {
nsIFrame* afterFrame = nsLayoutUtils::GetAfterFrame(aParentFrame);
if (afterFrame) {
nsFrameList frames(aParentFrame->GetFirstChild(nsnull));
// Insert the frames before the :after pseudo-element.
return frameManager->InsertFrames(aParentFrame,
nsnull,
frames.GetPrevSiblingFor(afterFrame),
aFrameList);
}
}
nsresult rv = NS_OK;
if (nsLayoutAtoms::tableFrame == aParentFrame->GetType()) {
nsIAtom* childType = aFrameList->GetType();
if (nsLayoutAtoms::tableColFrame == childType) {
// table column
nsIFrame* parentFrame = aFrameList->GetParent();
rv = frameManager->AppendFrames(parentFrame, nsLayoutAtoms::colGroupList,
aFrameList);
}
else if (nsLayoutAtoms::tableCaptionFrame == childType) {
// table caption
rv = frameManager->AppendFrames(aParentFrame, nsLayoutAtoms::captionList,
aFrameList);
}
else {
rv = frameManager->AppendFrames(aParentFrame, nsnull, aFrameList);
}
}
else {
// Append the frames to the end of the parent's child list
// check for a table caption which goes on an additional child list with a different parent
nsIFrame* outerTableFrame;
if (GetCaptionAdjustedParent(aParentFrame, aFrameList, &outerTableFrame)) {
rv = frameManager->AppendFrames(outerTableFrame,
nsLayoutAtoms::captionList, aFrameList);
}
else {
rv = frameManager->AppendFrames(aParentFrame, nsnull, aFrameList);
}
}
return rv;
}
/**
* Find the ``rightmost'' frame for the anonymous content immediately
* preceding aChild, following continuation if necessary.
*/
static nsIFrame*
FindPreviousAnonymousSibling(nsIPresShell* aPresShell,
nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild)
{
NS_PRECONDITION(aDocument, "null document from content element in FindNextAnonymousSibling");
nsCOMPtr<nsIDOMDocumentXBL> xblDoc(do_QueryInterface(aDocument));
NS_ASSERTION(xblDoc, "null xblDoc for content element in FindNextAnonymousSibling");
if (! xblDoc)
return nsnull;
// Grovel through the anonymous elements looking for aChild. We'll
// start our search for a previous frame there.
nsCOMPtr<nsIDOMNodeList> nodeList;
nsCOMPtr<nsIDOMElement> elt(do_QueryInterface(aContainer));
xblDoc->GetAnonymousNodes(elt, getter_AddRefs(nodeList));
if (! nodeList)
return nsnull;
PRUint32 length;
nodeList->GetLength(&length);
PRInt32 index;
for (index = PRInt32(length) - 1; index >= 0; --index) {
nsCOMPtr<nsIDOMNode> node;
nodeList->Item(PRUint32(index), getter_AddRefs(node));
nsCOMPtr<nsIContent> child = do_QueryInterface(node);
if (child == aChild)
break;
}
// We want the node immediately before aChild. Keep going until we
// run off the beginning of the nodeList, or we find a frame.
while (--index >= 0) {
nsCOMPtr<nsIDOMNode> node;
nodeList->Item(PRUint32(index), getter_AddRefs(node));
nsCOMPtr<nsIContent> child = do_QueryInterface(node);
// Get its frame. If it doesn't have one, continue on to the
// anonymous element that preceded it.
nsIFrame* prevSibling;
aPresShell->GetPrimaryFrameFor(child, &prevSibling);
if (prevSibling) {
// The frame may be a special frame (a split inline frame that
// contains a block). Get the last part of that split.
if (IsFrameSpecial(prevSibling)) {
prevSibling = GetLastSpecialSibling(aPresShell->FrameManager(),
prevSibling);
}
// The frame may have a continuation. If so, we want the
// last-in-flow as our previous sibling.
prevSibling = prevSibling->GetLastInFlow();
// If the frame is out-of-flow, GPFF() will have returned the
// out-of-flow frame; we want the placeholder.
const nsStyleDisplay* display = prevSibling->GetStyleDisplay();
if (display->IsFloating() || display->IsAbsolutelyPositioned()) {
nsIFrame *placeholderFrame;
aPresShell->GetPlaceholderFrameFor(prevSibling, &placeholderFrame);
NS_ASSERTION(placeholderFrame, "no placeholder for out-of-flow frame");
prevSibling = placeholderFrame;
}
// Found a previous sibling, we're done!
return prevSibling;
}
}
return nsnull;
}
/**
* Find the frame for the anonymous content immediately following
* aChild.
*/
static nsIFrame*
FindNextAnonymousSibling(nsIPresShell* aPresShell,
nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild)
{
NS_PRECONDITION(aDocument, "null document from content element in FindNextAnonymousSibling");
nsCOMPtr<nsIDOMDocumentXBL> xblDoc(do_QueryInterface(aDocument));
NS_ASSERTION(xblDoc, "null xblDoc for content element in FindNextAnonymousSibling");
if (! xblDoc)
return nsnull;
// Grovel through the anonymous elements looking for aChild
nsCOMPtr<nsIDOMNodeList> nodeList;
nsCOMPtr<nsIDOMElement> elt(do_QueryInterface(aContainer));
xblDoc->GetAnonymousNodes(elt, getter_AddRefs(nodeList));
if (! nodeList)
return nsnull;
PRUint32 length;
nodeList->GetLength(&length);
PRInt32 index;
for (index = 0; index < PRInt32(length); ++index) {
nsCOMPtr<nsIDOMNode> node;
nodeList->Item(PRUint32(index), getter_AddRefs(node));
nsCOMPtr<nsIContent> child = do_QueryInterface(node);
if (child == aChild)
break;
}
// We want the node immediately after aChild. Keep going until we
// run off the end of the nodeList, or we find a next sibling.
while (++index < PRInt32(length)) {
nsCOMPtr<nsIDOMNode> node;
nodeList->Item(PRUint32(index), getter_AddRefs(node));
nsCOMPtr<nsIContent> child = do_QueryInterface(node);
// Get its frame
nsIFrame* nextSibling;
aPresShell->GetPrimaryFrameFor(child, &nextSibling);
if (nextSibling) {
// The primary frame should never be a continuation
NS_ASSERTION(!nextSibling->GetPrevInFlow(),
"primary frame is a continuation!?");
// If the frame is out-of-flow, GPFF() will have returned the
// out-of-flow frame; we want the placeholder.
const nsStyleDisplay* display = nextSibling->GetStyleDisplay();
if (display->IsFloating() || display->IsAbsolutelyPositioned()) {
nsIFrame* placeholderFrame;
aPresShell->GetPlaceholderFrameFor(nextSibling, &placeholderFrame);
NS_ASSERTION(placeholderFrame, "no placeholder for out-of-flow frame");
nextSibling = placeholderFrame;
}
// Found a next sibling, we're done!
return nextSibling;
}
}
return nsnull;
}
#define UNSET_DISPLAY 255
// This gets called to see if the frames corresponding to aSiblingDisplay and aDisplay
// should be siblings in the frame tree. Although (1) rows and cols, (2) row groups
// and col groups, (3) row groups and captions (4) legends and content inside fieldsets
// are siblings from a content perspective, they are not considered siblings in the
// frame tree.
PRBool
nsCSSFrameConstructor::IsValidSibling(nsIFrame* aParentFrame,
const nsIFrame& aSibling,
PRUint8 aSiblingDisplay,
nsIContent& aContent,
PRUint8& aDisplay)
{
if ((NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP == aSiblingDisplay) ||
(NS_STYLE_DISPLAY_TABLE_COLUMN == aSiblingDisplay) ||
(NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == aSiblingDisplay) ||
(NS_STYLE_DISPLAY_TABLE_ROW_GROUP == aSiblingDisplay) ||
(NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == aSiblingDisplay)) {
// if we haven't already, construct a style context to find the display type of aContent
if (UNSET_DISPLAY == aDisplay) {
nsRefPtr<nsStyleContext> styleContext;
styleContext = ResolveStyleContext(aSibling.GetParent(), &aContent);
if (!styleContext) return PR_FALSE;
const nsStyleDisplay* display = styleContext->GetStyleDisplay();
aDisplay = display->mDisplay;
}
switch (aSiblingDisplay) {
case NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP:
return (NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP == aDisplay);
case NS_STYLE_DISPLAY_TABLE_COLUMN:
return (NS_STYLE_DISPLAY_TABLE_COLUMN == aDisplay);
default: // all of the row group types
return (NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == aDisplay) ||
(NS_STYLE_DISPLAY_TABLE_ROW_GROUP == aDisplay) ||
(NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == aDisplay) ||
(NS_STYLE_DISPLAY_TABLE_CAPTION == aDisplay);
}
}
else if (NS_STYLE_DISPLAY_TABLE_CAPTION == aSiblingDisplay) {
// Nothing can be a sibling of a caption since there can only be one caption.
// But this check is necessary since a row group and caption are siblings
// from a content perspective (they share the table content as parent)
return PR_FALSE;
}
else {
if (nsLayoutAtoms::fieldSetFrame == aParentFrame->GetType()) {
// Legends can be sibling of legends but not of other content in the fieldset
nsIAtom* sibType = aSibling.GetType();
nsCOMPtr<nsIDOMHTMLLegendElement> legendContent(do_QueryInterface(&aContent));
if ((legendContent && (nsLayoutAtoms::legendFrame != sibType)) ||
(!legendContent && (nsLayoutAtoms::legendFrame == sibType)))
return PR_FALSE;
}
}
return PR_TRUE;
}
/**
* Find the ``rightmost'' frame for the content immediately preceding
* aIndexInContainer, following continuations if necessary.
*/
nsIFrame*
nsCSSFrameConstructor::FindPreviousSibling(nsIContent* aContainer,
nsIFrame* aContainerFrame,
PRInt32 aIndexInContainer,
const nsIContent* aChild)
{
NS_ASSERTION(aContainer, "null argument");
ChildIterator first, iter;
nsresult rv = ChildIterator::Init(aContainer, &first, &iter);
NS_ENSURE_SUCCESS(rv, nsnull);
iter.seek(aIndexInContainer);
PRUint8 childDisplay = UNSET_DISPLAY;
// Note: not all content objects are associated with a frame (e.g., if it's
// `display: hidden') so keep looking until we find a previous frame
while (iter-- != first) {
nsIFrame* prevSibling = nsnull;
mPresShell->GetPrimaryFrameFor(nsCOMPtr<nsIContent>(*iter), &prevSibling);
if (prevSibling) {
// The frame may be a special frame (a split inline frame that
// contains a block). Get the last part of that split.
if (IsFrameSpecial(prevSibling)) {
prevSibling = GetLastSpecialSibling(mPresShell->FrameManager(),
prevSibling);
}
// The frame may have a continuation. Get the last-in-flow
prevSibling = prevSibling->GetLastInFlow();
// If the frame is out-of-flow, GPFF() will have returned the
// out-of-flow frame; we want the placeholder.
// XXXldb Why not check NS_FRAME_OUT_OF_FLOW state bit?
const nsStyleDisplay* display = prevSibling->GetStyleDisplay();
if (aChild && !IsValidSibling(aContainerFrame, *prevSibling,
display->mDisplay, (nsIContent&)*aChild,
childDisplay))
continue;
if (display->mDisplay == NS_STYLE_DISPLAY_POPUP) {
nsIFrame* placeholderFrame;
mPresShell->GetPlaceholderFrameFor(prevSibling, &placeholderFrame);
// XXXldb Was this supposed to be a null-check of placeholderFrame?
if (prevSibling)
prevSibling = placeholderFrame;
}
else if (display->IsFloating() || display->IsAbsolutelyPositioned()) {
nsIFrame* placeholderFrame;
mPresShell->GetPlaceholderFrameFor(prevSibling, &placeholderFrame);
NS_ASSERTION(placeholderFrame, "no placeholder for out-of-flow frame");
prevSibling = placeholderFrame;
}
#ifdef DEBUG
nsIFrame* containerFrame = nsnull;
mPresShell->GetPrimaryFrameFor(aContainer, &containerFrame);
NS_ASSERTION(prevSibling != containerFrame, "Previous Sibling is the Container's frame");
#endif
// Found a previous sibling, we're done!
return prevSibling;
}
}
return nsnull;
}
/**
* Find the frame for the content node immediately following
* aIndexInContainer.
*/
nsIFrame*
nsCSSFrameConstructor::FindNextSibling(nsIContent* aContainer,
nsIFrame* aContainerFrame,
PRInt32 aIndexInContainer,
const nsIContent* aChild)
{
ChildIterator iter, last;
nsresult rv = ChildIterator::Init(aContainer, &iter, &last);
NS_ENSURE_SUCCESS(rv, nsnull);
iter.seek(aIndexInContainer);
// Catch the case where someone tries to append
if (iter == last)
return nsnull;
PRUint8 childDisplay = UNSET_DISPLAY;
while (++iter != last) {
nsIFrame* nextSibling = nsnull;
mPresShell->GetPrimaryFrameFor(nsCOMPtr<nsIContent>(*iter), &nextSibling);
if (nextSibling) {
// The frame primary frame should never be a continuation
NS_ASSERTION(!nextSibling->GetPrevInFlow(),
"primary frame is a continuation!?");
// If the frame is out-of-flow, GPFF() will have returned the
// out-of-flow frame; we want the placeholder.
const nsStyleDisplay* display = nextSibling->GetStyleDisplay();
if (aChild && !IsValidSibling(aContainerFrame, *nextSibling,
display->mDisplay, (nsIContent&)*aChild,
childDisplay))
continue;
if (display->IsFloating() || display->IsAbsolutelyPositioned()) {
// Nope. Get the place-holder instead
nsIFrame* placeholderFrame;
mPresShell->GetPlaceholderFrameFor(nextSibling, &placeholderFrame);
NS_ASSERTION(placeholderFrame, "no placeholder for out-of-flow frame");
nextSibling = placeholderFrame;
}
// We found a next sibling, we're done!
return nextSibling;
}
}
return nsnull;
}
inline PRBool
ShouldIgnoreSelectChild(nsIContent* aContainer)
{
// Ignore options and optgroups inside a select (size > 1)
nsIAtom *containerTag = aContainer->Tag();
if (containerTag == nsHTMLAtoms::optgroup ||
containerTag == nsHTMLAtoms::select) {
nsIContent* selectContent = aContainer;
while (containerTag != nsHTMLAtoms::select) {
selectContent = selectContent->GetParent();
if (!selectContent) {
break;
}
containerTag = selectContent->Tag();
}
nsCOMPtr<nsISelectElement> selectElement = do_QueryInterface(selectContent);
if (selectElement) {
nsAutoString selSize;
aContainer->GetAttr(kNameSpaceID_None, nsHTMLAtoms::size, selSize);
if (!selSize.IsEmpty()) {
PRInt32 err;
return (selSize.ToInteger(&err) > 1);
}
}
}
return PR_FALSE;
}
// For tables, returns the inner table, if the child is not a caption.
// For fieldsets, returns the area frame, if the child is not a legend.
static nsIFrame*
GetAdjustedParentFrame(nsIFrame* aParentFrame,
nsIAtom* aParentFrameType,
nsIContent* aParentContent,
PRInt32 aChildIndex)
{
nsIContent *childContent = aParentContent->GetChildAt(aChildIndex);
nsIFrame* newParent = nsnull;
if (nsLayoutAtoms::tableOuterFrame == aParentFrameType) {
nsCOMPtr<nsIDOMHTMLTableCaptionElement> captionContent(do_QueryInterface(childContent));
// If the parent frame is an outer table, use the innner table
// as the parent unless the new content is a caption.
if (!captionContent)
newParent = aParentFrame->GetFirstChild(nsnull);
}
else if (nsLayoutAtoms::fieldSetFrame == aParentFrameType) {
// If the parent is a fieldSet, use the fieldSet's area frame as the
// parent unless the new content is a legend.
nsCOMPtr<nsIDOMHTMLLegendElement> legendContent(do_QueryInterface(childContent));
if (!legendContent) {
// Depends on the fieldset child frame order - see ConstructFieldSetFrame() above.
newParent = aParentFrame->GetFirstChild(nsnull);
if (newParent->GetNextSibling()) {
newParent = newParent->GetNextSibling();
}
}
}
return (newParent) ? newParent : aParentFrame;
}
nsresult
nsCSSFrameConstructor::ContentAppended(nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::ContentAppended container=%p index=%d\n",
NS_STATIC_CAST(void*, aContainer), aNewIndexInContainer);
if (gReallyNoisyContentUpdates && aContainer) {
aContainer->List(stdout, 0);
}
}
#endif
#ifdef MOZ_XUL
if (aContainer) {
nsCOMPtr<nsIAtom> tag;
PRInt32 namespaceID;
mDocument->BindingManager()->ResolveTag(aContainer, &namespaceID,
getter_AddRefs(tag));
// Just ignore tree tags, anyway we don't create any frames for them.
if (tag == nsXULAtoms::treechildren ||
tag == nsXULAtoms::treeitem ||
tag == nsXULAtoms::treerow ||
(namespaceID == kNameSpaceID_XUL && gUseXBLForms &&
ShouldIgnoreSelectChild(aContainer)))
return NS_OK;
}
#endif // MOZ_XUL
// Get the frame associated with the content
nsIFrame* parentFrame = GetFrameFor(aContainer);
if (! parentFrame)
return NS_OK;
// See if we have an XBL insertion point. If so, then that's our
// real parent frame; if not, then the frame hasn't been built yet
// and we just bail.
//
nsIFrame* insertionPoint;
PRBool multiple = PR_FALSE;
GetInsertionPoint(parentFrame, nsnull, &insertionPoint, &multiple);
if (! insertionPoint)
return NS_OK; // Don't build the frames.
PRBool hasInsertion = PR_FALSE;
if (!multiple) {
nsIBindingManager *bindingManager = nsnull;
nsIDocument* document = nsnull;
nsIContent *firstAppendedChild =
aContainer->GetChildAt(aNewIndexInContainer);
if (firstAppendedChild) {
document = firstAppendedChild->GetDocument();
}
if (document)
bindingManager = document->BindingManager();
if (bindingManager) {
nsCOMPtr<nsIContent> insParent;
bindingManager->GetInsertionParent(firstAppendedChild, getter_AddRefs(insParent));
if (insParent)
hasInsertion = PR_TRUE;
}
}
if (multiple || hasInsertion) {
// We have an insertion point. There are some additional tests we need to do
// in order to ensure that an append is a safe operation.
PRUint32 childCount = 0;
if (!multiple) {
// We may need to make multiple ContentInserted calls instead. A
// reasonable heuristic to employ (in order to maintain good performance)
// is to find out if the insertion point's content node contains any
// explicit children. If it does not, then it is highly likely that
// an append is occurring. (Note it is not definite, and there are insane
// cases we will not deal with by employing this heuristic, but it beats
// always falling back to multiple ContentInserted calls).
//
// In the multiple insertion point case, we know we're going to need to do
// multiple ContentInserted calls anyway.
childCount = insertionPoint->GetContent()->GetChildCount();
}
if (multiple || childCount > 0) {
// Now comes the fun part. For each appended child, we must obtain its
// insertion point and find its exact position within that insertion point.
// We then make a ContentInserted call with the correct computed index.
nsIContent* insertionContent = insertionPoint->GetContent();
PRUint32 containerCount = aContainer->GetChildCount();
for (PRUint32 i = aNewIndexInContainer; i < containerCount; i++) {
nsIContent *child = aContainer->GetChildAt(i);
if (multiple) {
// Filters are in effect, so the insertion point needs to be refetched for
// each child.
GetInsertionPoint(parentFrame, child, &insertionPoint);
if (!insertionPoint) {
// This content node doesn't have an insertion point, so we just
// skip over it
continue;
}
insertionContent = insertionPoint->GetContent();
}
// Construct an iterator to locate this child at its correct index.
ChildIterator iter, last;
for (ChildIterator::Init(insertionContent, &iter, &last);
iter != last;
++iter) {
nsIContent* item = nsCOMPtr<nsIContent>(*iter);
if (item == child)
// Call ContentInserted with this index.
ContentInserted(aContainer, nsnull, child,
iter.index(), mTempFrameTreeState, PR_FALSE);
}
}
return NS_OK;
}
}
parentFrame = insertionPoint;
// If the frame we are manipulating is a ``special'' frame (that
// is, one that's been created as a result of a block-in-inline
// situation) then do something different instead of just
// appending newly created frames. Note that only the
// first-in-flow is marked so we check before getting to the
// last-in-flow.
//
// We run into this situation occasionally while loading web
// pages, typically when some content generation tool has
// sprinkled invalid markup into the document. More often than
// not, we'll be able to just use the normal fast-path frame
// construction code, because the frames will be appended to the
// ``anonymous'' block that got created to parent the block
// children of the inline.
if (IsFrameSpecial(parentFrame)) {
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::ContentAppended: parentFrame=");
nsFrame::ListTag(stdout, parentFrame);
printf(" is special\n");
}
#endif
// Since we're appending, we'll walk to the last anonymous frame
// that was created for the broken inline frame.
nsFrameManager *frameManager = mPresShell->FrameManager();
while (1) {
nsIFrame* sibling;
GetSpecialSibling(frameManager, parentFrame, &sibling);
if (! sibling)
break;
parentFrame = sibling;
}
// If this frame is the anonymous block frame, then all's well:
// just append frames as usual.
const nsStyleDisplay* display = parentFrame->GetStyleDisplay();
if (NS_STYLE_DISPLAY_BLOCK != display->mDisplay) {
// Nope, it's an inline, so just reframe the entire stinkin' mess if the
// content is a block. We _could_ do better here with a little more work...
// find out if the child is a block or inline, an inline means we don't have to reframe
nsIContent *child = aContainer->GetChildAt(aNewIndexInContainer);
PRBool needReframe = !child;
if (child && child->IsContentOfType(nsIContent::eELEMENT)) {
nsRefPtr<nsStyleContext> styleContext;
styleContext = ResolveStyleContext(parentFrame, child);
// XXX since the block child goes in the last inline of the sacred triad, frames would
// need to be moved into the 2nd triad (block) but that is more work, for now bail.
needReframe = styleContext->GetStyleDisplay()->IsBlockLevel();
}
if (needReframe)
return ReframeContainingBlock(parentFrame);
}
}
// Get the parent frame's last-in-flow
parentFrame = parentFrame->GetLastInFlow();
// If we didn't process children when we originally created the frame,
// then don't do any processing now
nsIAtom* frameType = parentFrame->GetType();
if (frameType == nsLayoutAtoms::objectFrame ||
frameType == nsLayoutAtoms::tableColFrame) {
// This handles APPLET, EMBED, OBJECT and COL
return NS_OK;
}
// Deal with inner/outer tables, fieldsets
parentFrame = ::GetAdjustedParentFrame(parentFrame, frameType,
aContainer, aNewIndexInContainer);
// Create some new frames
PRUint32 count;
nsIFrame* firstAppendedFrame = nsnull;
nsFrameItems frameItems;
nsFrameConstructorState state(mPresShell, mFixedContainingBlock,
GetAbsoluteContainingBlock(parentFrame),
GetFloatContainingBlock(parentFrame));
// See if the containing block has :first-letter style applied.
PRBool haveFirstLetterStyle, haveFirstLineStyle;
nsIFrame* containingBlock = state.mFloatedItems.containingBlock;
nsIContent* blockContent = containingBlock->GetContent();
nsStyleContext* blockSC = containingBlock->GetStyleContext();
HaveSpecialBlockStyle(blockContent, blockSC,
&haveFirstLetterStyle,
&haveFirstLineStyle);
if (haveFirstLetterStyle) {
// Before we get going, remove the current letter frames
RemoveLetterFrames(state.mPresContext, state.mPresShell,
state.mFrameManager, containingBlock);
}
// if the container is a table and a caption was appended, it needs to be put in
// the outer table frame's additional child list.
nsFrameItems captionItems;
PRBool hasCaption = PR_FALSE;
if (nsLayoutAtoms::tableFrame == frameType) {
nsIFrame* outerTable = parentFrame->GetParent();
if (outerTable) {
if (outerTable->GetFirstChild(nsLayoutAtoms::captionList)) {
hasCaption = PR_TRUE;
}
}
}
PRUint32 i;
count = aContainer->GetChildCount();
for (i = aNewIndexInContainer; i < count; i++) {
nsIContent *childContent = aContainer->GetChildAt(i);
// lookup the table child frame type as it is much more difficult to remove a frame
// and all it descendants (abs. pos. for instance) than to prevent the frame creation.
if (nsLayoutAtoms::tableFrame == frameType) {
if (hasCaption) {
// Resolve the style context and get its display
nsRefPtr<nsStyleContext> childStyleContext;
childStyleContext = ResolveStyleContext(parentFrame, childContent);
if (childStyleContext->GetStyleDisplay()->mDisplay == NS_STYLE_DISPLAY_TABLE_CAPTION)
continue; //don't create a table caption frame and its descendants
}
nsFrameItems tempItems;
ConstructFrame(state, childContent, parentFrame, tempItems);
if (tempItems.childList) {
if (nsLayoutAtoms::tableCaptionFrame == tempItems.childList->GetType()) {
NS_ASSERTION(!captionItems.childList, "don't append twice a caption");
hasCaption = PR_TRUE; // remember that we have a caption now
captionItems.AddChild(tempItems.childList);
}
else {
frameItems.AddChild(tempItems.childList);
}
}
}
else if (nsLayoutAtoms::tableColGroupFrame == frameType) {
nsRefPtr<nsStyleContext> childStyleContext;
childStyleContext = ResolveStyleContext(parentFrame, childContent);
if (childStyleContext->GetStyleDisplay()->mDisplay != NS_STYLE_DISPLAY_TABLE_COLUMN)
continue; //don't create anything else than columns below a colgroup
ConstructFrame(state, childContent, parentFrame, frameItems);
}
// Don't create child frames for iframes/frames, they should not
// display any content that they contain.
else if (nsLayoutAtoms::subDocumentFrame != frameType) {
// Construct a child frame (that does not have a table as parent)
ConstructFrame(state, childContent, parentFrame, frameItems);
}
}
// We built some new frames. Initialize any newly-constructed bindings.
mDocument->BindingManager()->ProcessAttachedQueue();
// process the current pseudo frame state
if (!state.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(state, frameItems);
}
if (haveFirstLineStyle) {
// It's possible that some of the new frames go into a
// first-line frame. Look at them and see...
AppendFirstLineFrames(state, aContainer, parentFrame, frameItems);
}
nsresult result = NS_OK;
firstAppendedFrame = frameItems.childList;
if (!firstAppendedFrame) {
firstAppendedFrame = captionItems.childList;
}
// Notify the parent frame passing it the list of new frames
if (NS_SUCCEEDED(result) && firstAppendedFrame) {
// Perform special check for diddling around with the frames in
// a special inline frame.
// XXX Bug 18366
// Although select frame are inline we do not want to call
// WipeContainingBlock because it will throw away the entire selct frame and
// start over which is something we do not want to do
//
nsCOMPtr<nsIDOMHTMLSelectElement> selectContent(do_QueryInterface(aContainer));
if (!selectContent) {
if (WipeContainingBlock(state, containingBlock, parentFrame,
frameItems.childList)) {
return NS_OK;
}
}
// Append the flowed frames to the principal child list, tables need special treatment
if (nsLayoutAtoms::tableFrame == frameType) {
if (captionItems.childList) { // append the caption to the outer table
nsIFrame* outerTable = parentFrame->GetParent();
if (outerTable) {
AppendFrames(state, aContainer, outerTable, captionItems.childList);
}
}
if (frameItems.childList) { // append children of the inner table
AppendFrames(state, aContainer, parentFrame, frameItems.childList);
}
}
else {
AppendFrames(state, aContainer, parentFrame, firstAppendedFrame);
}
// Recover first-letter frames
if (haveFirstLetterStyle) {
RecoverLetterFrames(state, containingBlock);
}
}
// Here we have been notified that content has been appended so if
// the select now has a single item we need to go in and removed
// the dummy frame.
nsCOMPtr<nsIDOMHTMLSelectElement> sel(do_QueryInterface(aContainer));
if (sel) {
nsIContent *childContent = aContainer->GetChildAt(aNewIndexInContainer);
if (childContent) {
RemoveDummyFrameFromSelect(aContainer, childContent, sel);
}
}
#ifdef DEBUG
if (gReallyNoisyContentUpdates) {
nsIFrameDebug* fdbg = nsnull;
CallQueryInterface(parentFrame, &fdbg);
if (fdbg) {
printf("nsCSSFrameConstructor::ContentAppended: resulting frame model:\n");
fdbg->List(state.mPresContext, stdout, 0);
}
}
#endif
return NS_OK;
}
nsresult
nsCSSFrameConstructor::AddDummyFrameToSelect(nsFrameConstructorState& aState,
nsIFrame* aListFrame,
nsIFrame* aParentFrame,
nsFrameItems* aChildItems,
nsIContent* aContainer,
nsIDOMHTMLSelectElement* aSelectElement)
{
PRUint32 numOptions = 0;
nsresult rv = aSelectElement->GetLength(&numOptions);
if (NS_SUCCEEDED(rv) && 0 == numOptions) {
nsISelectControlFrame* listFrame = nsnull;
CallQueryInterface(aListFrame, &listFrame);
if (listFrame) {
nsIFrame* dummyFrame;
listFrame->GetDummyFrame(&dummyFrame);
if (!dummyFrame) {
nsStyleContext* styleContext = aParentFrame->GetStyleContext();
nsIFrame* generatedFrame = nsnull;
if (CreateGeneratedContentFrame(aState, aParentFrame, aContainer,
styleContext,
nsCSSAnonBoxes::dummyOption,
&generatedFrame)) {
// Add the generated frame to the child list
if (aChildItems) {
aChildItems->AddChild(generatedFrame);
} else {
aState.mFrameManager->AppendFrames(aParentFrame, nsnull,
generatedFrame);
}
listFrame->SetDummyFrame(generatedFrame);
return NS_OK;
}
}
}
}
return NS_ERROR_FAILURE;
}
// defined below
static nsresult
DeletingFrameSubtree(nsPresContext* aPresContext,
nsIPresShell* aPresShell,
nsFrameManager* aFrameManager,
nsIFrame* aFrame);
nsresult
nsCSSFrameConstructor::RemoveDummyFrameFromSelect(nsIContent* aContainer,
nsIContent* aChild,
nsIDOMHTMLSelectElement * aSelectElement)
{
// Check to see if this is the first thing we have added to this frame.
PRUint32 numOptions = 0;
nsresult rv = aSelectElement->GetLength(&numOptions);
if (NS_SUCCEEDED(rv) && numOptions > 0) {
nsIFrame* frame;
mPresShell->GetPrimaryFrameFor(aContainer, &frame);
if (frame) {
nsISelectControlFrame* listFrame = nsnull;
CallQueryInterface(frame, &listFrame);
if (listFrame) {
nsIFrame* dummyFrame;
listFrame->GetDummyFrame(&dummyFrame);
if (dummyFrame) {
listFrame->SetDummyFrame(nsnull);
// get the child's parent frame (which ought to be the list frame)
nsIFrame* parentFrame = dummyFrame->GetParent();
nsFrameManager *frameManager = mPresShell->FrameManager();
DeletingFrameSubtree(mPresShell->GetPresContext(), mPresShell,
frameManager, dummyFrame);
frameManager->RemoveFrame(parentFrame, nsnull, dummyFrame);
return NS_OK;
}
}
}
}
return NS_ERROR_FAILURE;
}
// Return TRUE if the insertion of aChild into aParent1,2 should force a reframe. aParent1 is
// the special inline container which contains a block. aParentFrame is approximately aParent1's
// primary frame and will be set to the correct parent of aChild if a reframe is not necessary.
// aParent2 is aParentFrame's content. aPrevSibling will be set to the correct prev sibling of
// aChild if a reframe is not necessary.
PRBool
nsCSSFrameConstructor::NeedSpecialFrameReframe(nsIContent* aParent1,
nsIContent* aParent2,
nsIFrame*& aParentFrame,
nsIContent* aChild,
PRInt32 aIndexInContainer,
nsIFrame*& aPrevSibling,
nsIFrame* aNextSibling)
{
NS_ENSURE_TRUE(aPrevSibling || aNextSibling, PR_TRUE);
if (!IsInlineFrame2(aParentFrame))
return PR_FALSE;
// find out if aChild is a block or inline
PRBool childIsBlock = PR_FALSE;
if (aChild->IsContentOfType(nsIContent::eELEMENT)) {
nsRefPtr<nsStyleContext> styleContext;
styleContext = ResolveStyleContext(aParentFrame, aChild);
childIsBlock = styleContext->GetStyleDisplay()->IsBlockLevel();
}
nsIFrame* prevParent; // parent of prev sibling
nsIFrame* nextParent; // parent of next sibling
if (childIsBlock) {
if (aPrevSibling) {
prevParent = aPrevSibling->GetParent();
NS_ASSERTION(prevParent, "program error - null parent frame");
if (IsInlineFrame2(prevParent)) { // prevParent is an inline
// XXX we need to find out if prevParent is the 1st inline or the last. If it
// is the 1st, then aChild and the frames after aPrevSibling within the 1st inline
// need to be moved to the block(inline). If it is the last, then aChild and the
// frames before aPrevSibling within the last need to be moved to the block(inline).
return PR_TRUE; // For now, bail.
}
aParentFrame = prevParent; // prevParent is a block, put aChild there
}
else {
nsIFrame* nextSibling = (aIndexInContainer >= 0)
? FindNextSibling(aParent2, aParentFrame,
aIndexInContainer)
: FindNextAnonymousSibling(mPresShell, mDocument,
aParent1, aChild);
if (nextSibling) {
nextParent = nextSibling->GetParent();
NS_ASSERTION(nextParent, "program error - null parent frame");
if (IsInlineFrame2(nextParent)) {
// XXX we need to move aChild, aNextSibling and all the frames after aNextSibling within
// the 1st inline to the block(inline).
return PR_TRUE; // for now, bail
}
// put aChild in nextParent which is the block(inline) and leave aPrevSibling null
aParentFrame = nextParent;
}
}
}
else { // aChild is an inline
if (aPrevSibling) {
prevParent = aPrevSibling->GetParent();
NS_ASSERTION(prevParent, "program error - null parent frame");
if (IsInlineFrame2(prevParent)) { // prevParent is an inline
// aChild goes into the same inline frame as aPrevSibling
aParentFrame = aPrevSibling->GetParent();
NS_ASSERTION(aParentFrame, "program error - null parent frame");
}
else { // prevParent is a block
nsIFrame* nextSibling = (aIndexInContainer >= 0)
? FindNextSibling(aParent2, aParentFrame,
aIndexInContainer)
: FindNextAnonymousSibling(mPresShell,
mDocument, aParent1,
aChild);
if (nextSibling) {
nextParent = nextSibling->GetParent();
NS_ASSERTION(nextParent, "program error - null parent frame");
if (IsInlineFrame2(nextParent)) {
// nextParent is the ending inline frame. Put aChild there and
// set aPrevSibling to null so aChild is its first element.
aParentFrame = nextSibling->GetParent();
NS_ASSERTION(aParentFrame, "program error - null parent frame");
aPrevSibling = nsnull;
}
else { // nextParent is a block
// prevParent and nextParent should be the same, and aChild goes there
NS_ASSERTION(prevParent == nextParent, "special frame error");
aParentFrame = prevParent;
}
}
else {
// there is no ending enline frame (which should never happen) but aChild needs to go
// there, so for now just bail and force a reframe.
NS_ASSERTION(PR_FALSE, "no last inline frame");
return PR_TRUE;
}
}
}
// else aChild goes into the 1st inline frame which is aParentFrame
}
return PR_FALSE;
}
#ifdef MOZ_XUL
enum content_operation
{
CONTENT_INSERTED,
CONTENT_REMOVED
};
// Helper function to lookup the listbox body frame and send a notification
// for insertion or removal of content
static
PRBool NotifyListBoxBody(nsPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer,
nsIDocument* aDocument,
nsIFrame* aChildFrame,
PRBool aUseXBLForms,
content_operation aOperation)
{
if (!aContainer)
return PR_FALSE;
if (aContainer->IsContentOfType(nsIContent::eXUL) &&
aChild->IsContentOfType(nsIContent::eXUL) &&
aContainer->Tag() == nsXULAtoms::listbox &&
aChild->Tag() == nsXULAtoms::listitem) {
nsCOMPtr<nsIDOMXULElement> xulElement = do_QueryInterface(aContainer);
nsCOMPtr<nsIBoxObject> boxObject;
xulElement->GetBoxObject(getter_AddRefs(boxObject));
nsCOMPtr<nsIListBoxObject> listBoxObject = do_QueryInterface(boxObject);
if (listBoxObject) {
nsIListBoxObject* listboxBody;
listBoxObject->GetListboxBody(&listboxBody);
if (listboxBody) {
nsListBoxBodyFrame *listBoxBodyFrame = NS_STATIC_CAST(nsListBoxBodyFrame*, listboxBody);
if (aOperation == CONTENT_REMOVED)
listBoxBodyFrame->OnContentRemoved(aPresContext, aChildFrame, aIndexInContainer);
else
listBoxBodyFrame->OnContentInserted(aPresContext, aChild);
//NS_RELEASE(listBoxBodyFrame); frames aren't refcounted
}
return PR_TRUE;
}
}
nsCOMPtr<nsIAtom> tag;
PRInt32 namespaceID;
aDocument->BindingManager()->ResolveTag(aContainer, &namespaceID,
getter_AddRefs(tag));
// Just ignore tree tags, anyway we don't create any frames for them.
if (tag == nsXULAtoms::treechildren ||
tag == nsXULAtoms::treeitem ||
tag == nsXULAtoms::treerow ||
(namespaceID == kNameSpaceID_XUL && aUseXBLForms &&
ShouldIgnoreSelectChild(aContainer)))
return PR_TRUE;
return PR_FALSE;
}
#endif // MOZ_XUL
nsresult
nsCSSFrameConstructor::ContentInserted(nsIContent* aContainer,
nsIFrame* aContainerFrame,
nsIContent* aChild,
PRInt32 aIndexInContainer,
nsILayoutHistoryState* aFrameState,
PRBool aInReinsertContent)
{
// XXXldb Do we need to re-resolve style to handle the CSS2 + combinator and
// the :empty pseudo-class?
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::ContentInserted container=%p child=%p index=%d\n",
NS_STATIC_CAST(void*, aContainer),
NS_STATIC_CAST(void*, aChild),
aIndexInContainer);
if (gReallyNoisyContentUpdates) {
(aContainer ? aContainer : aChild)->List(stdout, 0);
}
}
#endif
nsresult rv = NS_OK;
#ifdef MOZ_XUL
if (NotifyListBoxBody(mPresShell->GetPresContext(), aContainer, aChild,
aIndexInContainer,
mDocument, nsnull, gUseXBLForms, CONTENT_INSERTED))
return NS_OK;
#endif // MOZ_XUL
// If we have a null parent, then this must be the document element
// being inserted
if (! aContainer) {
nsIContent *docElement = mDocument->GetRootContent();
if (aChild == docElement) {
NS_PRECONDITION(nsnull == mInitialContainingBlock, "initial containing block already created");
if (!mDocElementContainingBlock)
return NS_OK; // We get into this situation when an XBL binding is asynchronously
// applied to the root tag (e.g., <window> in XUL). It's ok. We can
// just bail here because the root will really be built later during
// InitialReflow.
// Create frames for the document element and its child elements
nsIFrame* docElementFrame;
nsFrameConstructorState state(mPresShell, mFixedContainingBlock, nsnull,
nsnull, aFrameState);
ConstructDocElementFrame(state,
docElement,
mDocElementContainingBlock,
&docElementFrame);
if (mDocElementContainingBlock->GetStateBits() & NS_FRAME_FIRST_REFLOW) {
// Set the initial child list for the parent and wait on the initial
// reflow.
mDocElementContainingBlock->SetInitialChildList(state.mPresContext,
nsnull,
docElementFrame);
} else {
// Whoops, we've already received our initial reflow! Insert the doc.
// element as a child so it reflows (note that containing block is
// empty, so we can simply append).
NS_ASSERTION(mDocElementContainingBlock->GetFirstChild(nsnull) == nsnull,
"Unexpected child of document element containing block");
mDocElementContainingBlock->AppendFrames(nsnull, docElementFrame);
}
#ifdef DEBUG
if (gReallyNoisyContentUpdates && docElementFrame) {
nsIFrameDebug* fdbg = nsnull;
CallQueryInterface(docElementFrame, &fdbg);
if (fdbg) {
printf("nsCSSFrameConstructor::ContentInserted: resulting frame model:\n");
fdbg->List(state.mPresContext, stdout, 0);
}
}
#endif
}
mDocument->BindingManager()->ProcessAttachedQueue();
// otherwise this is not a child of the root element, and we
// won't let it have a frame.
return NS_OK;
}
// Otherwise, we've got parent content. Find its frame.
nsIFrame* parentFrame = aContainerFrame;
if (!parentFrame) {
parentFrame = GetFrameFor(aContainer);
if (! parentFrame)
return NS_OK; // XXXwaterson will this break selects? (See ``Here
// we have been notified...'' below.)
}
// See if we have an XBL insertion point. If so, then that's our
// real parent frame; if not, then the frame hasn't been built yet
// and we just bail.
nsIFrame* insertionPoint;
GetInsertionPoint(parentFrame, aChild, &insertionPoint);
if (! insertionPoint)
return NS_OK; // Don't build the frames.
parentFrame = insertionPoint;
// Find the frame that precedes the insertion point. Walk backwards
// from the parent frame to get the parent content, because if an
// XBL insertion point is involved, we'll need to use _that_ to find
// the preceding frame.
nsIContent* container = parentFrame->GetContent();
// XXX if the insertionPoint was different from the original
// parentFrame, then aIndexInContainer is most likely completely
// wrong. What we need to do here is remember the original index,
// then as we insert, search the child list where we're about to put
// the new frame to make sure that it appears after any siblings
// with a lower index, and before any siblings with a higher
// index. Same with FindNextSibling(), below.
nsIFrame* prevSibling = (aIndexInContainer >= 0)
? FindPreviousSibling(container, parentFrame, aIndexInContainer, aChild)
: FindPreviousAnonymousSibling(mPresShell, mDocument, aContainer, aChild);
PRBool isAppend = PR_FALSE;
nsIFrame* nextSibling = nsnull;
// If there is no previous sibling, then find the frame that follows
if (! prevSibling) {
nextSibling = (aIndexInContainer >= 0)
? FindNextSibling(container, parentFrame, aIndexInContainer, aChild)
: FindNextAnonymousSibling(mPresShell, mDocument, aContainer, aChild);
}
PRBool handleSpecialFrame = IsFrameSpecial(parentFrame) && !aInReinsertContent;
// Now, find the geometric parent so that we can handle
// continuations properly. Use the prev sibling if we have it;
// otherwise use the next sibling.
if (prevSibling) {
if (!handleSpecialFrame)
parentFrame = prevSibling->GetParent();
}
else if (nextSibling) {
if (!handleSpecialFrame)
parentFrame = nextSibling->GetParent();
}
else {
// No previous or next sibling, so treat this like an appended frame.
isAppend = PR_TRUE;
// If we didn't process children when we originally created the frame,
// then don't do any processing now
nsIAtom* frameType = parentFrame->GetType();
if (frameType == nsLayoutAtoms::objectFrame) {
// This handles APPLET, EMBED, and OBJECT
return NS_OK;
}
// Deal with inner/outer tables, fieldsets
parentFrame = ::GetAdjustedParentFrame(parentFrame, frameType,
aContainer, aIndexInContainer);
}
// If the frame we are manipulating is a special frame then see if we need to reframe
// NOTE: if we are in ReinsertContent, then don't reframe as we are already doing just that!
if (handleSpecialFrame) {
// a special inline frame has propagated some of its children upward to be children
// of the block and those frames may need to move around. Sometimes we may need to reframe
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::ContentInserted: parentFrame=");
nsFrame::ListTag(stdout, parentFrame);
printf(" is special\n");
}
#endif
// if we don't need to reframe then set parentFrame and prevSibling to the correct values
if (NeedSpecialFrameReframe(aContainer, container, parentFrame,
aChild, aIndexInContainer, prevSibling,
nextSibling)) {
return ReframeContainingBlock(parentFrame);
}
}
nsFrameItems frameItems;
nsFrameConstructorState state(mPresShell, mFixedContainingBlock,
GetAbsoluteContainingBlock(parentFrame),
GetFloatContainingBlock(parentFrame),
aFrameState);
// Recover state for the containing block - we need to know if
// it has :first-letter or :first-line style applied to it. The
// reason we care is that the internal structure in these cases
// is not the normal structure and requires custom updating
// logic.
nsIFrame* containingBlock = state.mFloatedItems.containingBlock;
nsStyleContext* blockSC;
nsIContent* blockContent = nsnull;
PRBool haveFirstLetterStyle = PR_FALSE;
PRBool haveFirstLineStyle = PR_FALSE;
// In order to shave off some cycles, we only dig up the
// containing block haveFirst* flags if the parent frame where
// the insertion/append is occuring is an inline or block
// container. For other types of containers this isn't relevant.
const nsStyleDisplay* parentDisplay = parentFrame->GetStyleDisplay();
// Examine the parentFrame where the insertion is taking
// place. If its a certain kind of container then some special
// processing is done.
if ((NS_STYLE_DISPLAY_BLOCK == parentDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_LIST_ITEM == parentDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_INLINE == parentDisplay->mDisplay) ||
(NS_STYLE_DISPLAY_INLINE_BLOCK == parentDisplay->mDisplay)) {
// Recover the special style flags for the containing block
blockSC = containingBlock->GetStyleContext();
blockContent = containingBlock->GetContent();
HaveSpecialBlockStyle(blockContent, blockSC,
&haveFirstLetterStyle,
&haveFirstLineStyle);
if (haveFirstLetterStyle) {
// Get the correct parentFrame and prevSibling - if a
// letter-frame is present, use its parent.
if (parentFrame->GetType() == nsLayoutAtoms::letterFrame) {
parentFrame = parentFrame->GetParent();
}
// Remove the old letter frames before doing the insertion
RemoveLetterFrames(state.mPresContext, mPresShell,
state.mFrameManager,
state.mFloatedItems.containingBlock);
// Check again to see if the frame we are manipulating is part
// of a block-in-inline hierarchy.
if (IsFrameSpecial(parentFrame)) {
nsCOMPtr<nsIContent> parentContainer = blockContent->GetParent();
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::ContentInserted: parentFrame=");
nsFrame::ListTag(stdout, parentFrame);
printf(" is special inline\n");
printf(" ==> blockContent=%p, parentContainer=%p\n",
NS_STATIC_CAST(void*, blockContent),
NS_STATIC_CAST(void*, parentContainer));
}
#endif
if (parentContainer) {
ReinsertContent(parentContainer, blockContent);
}
else {
// XXX uh oh. the block that needs reworking has no parent...
NS_NOTREACHED("block that needs recreation has no parent");
}
return NS_OK;
}
// Removing the letterframes messes around with the frame tree, removing
// and creating frames. We need to reget our prevsibling.
// See XXX comment the first time we do this in this method....
prevSibling = (aIndexInContainer >= 0)
? FindPreviousSibling(container, parentFrame, aIndexInContainer,
aChild)
: FindPreviousAnonymousSibling(mPresShell, mDocument, aContainer,
aChild);
}
}
else if (NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP == parentDisplay->mDisplay) {
nsRefPtr<nsStyleContext> childStyleContext;
childStyleContext = ResolveStyleContext(parentFrame, aChild);
if (childStyleContext->GetStyleDisplay()->mDisplay != NS_STYLE_DISPLAY_TABLE_COLUMN)
return NS_OK; //don't create anything else than columns below a colgroup
}
ConstructFrame(state, aChild, parentFrame, frameItems);
// Now that we've created frames, run the attach queue.
//XXXwaterson should we do this after we've processed pseudos, too?
mDocument->BindingManager()->ProcessAttachedQueue();
// process the current pseudo frame state
if (!state.mPseudoFrames.IsEmpty())
ProcessPseudoFrames(state, frameItems);
// XXX Bug 19949
// Although select frame are inline we do not want to call
// WipeContainingBlock because it will throw away the entire select frame and
// start over which is something we do not want to do
//
nsCOMPtr<nsIDOMHTMLSelectElement> selectContent = do_QueryInterface(aContainer);
if (!selectContent) {
// Perform special check for diddling around with the frames in
// a special inline frame.
if (WipeContainingBlock(state, containingBlock, parentFrame,
frameItems.childList))
return NS_OK;
}
if (haveFirstLineStyle) {
// It's possible that the new frame goes into a first-line
// frame. Look at it and see...
if (isAppend) {
// Use append logic when appending
AppendFirstLineFrames(state, aContainer, parentFrame, frameItems);
}
else {
// Use more complicated insert logic when inserting
InsertFirstLineFrames(state, aContainer, containingBlock, &parentFrame,
prevSibling, frameItems);
}
}
nsIFrame* newFrame = frameItems.childList;
if (NS_SUCCEEDED(rv) && newFrame) {
// Notify the parent frame
if (isAppend) {
AppendFrames(state, aContainer, parentFrame, newFrame);
}
else {
if (!prevSibling) {
// We're inserting the new frame as the first child. See if the
// parent has a :before pseudo-element
nsIFrame* firstChild = parentFrame->GetFirstChild(nsnull);
if (firstChild &&
nsLayoutUtils::IsGeneratedContentFor(aContainer, firstChild,
nsCSSPseudoElements::before)) {
// Insert the new frames after the :before pseudo-element
prevSibling = firstChild;
}
}
// check for a table caption which goes on an additional child list
nsIFrame* outerTableFrame;
if (GetCaptionAdjustedParent(parentFrame, newFrame, &outerTableFrame)) {
// XXXwaterson this seems wrong; i.e., how can we assume
// that appending is the right thing to do here?
state.mFrameManager->AppendFrames(outerTableFrame,
nsLayoutAtoms::captionList,
newFrame);
}
else {
state.mFrameManager->InsertFrames(parentFrame,
nsnull, prevSibling, newFrame);
}
}
if (haveFirstLetterStyle) {
// Recover the letter frames for the containing block when
// it has first-letter style.
RecoverLetterFrames(state, state.mFloatedItems.containingBlock);
}
}
// Here we have been notified that content has been insert
// so if the select now has a single item
// we need to go in and removed the dummy frame
nsCOMPtr<nsIDOMHTMLSelectElement> selectElement = do_QueryInterface(aContainer);
if (selectElement)
RemoveDummyFrameFromSelect(aContainer, aChild, selectElement);
#ifdef DEBUG
if (gReallyNoisyContentUpdates && parentFrame) {
nsIFrameDebug* fdbg = nsnull;
CallQueryInterface(parentFrame, &fdbg);
if (fdbg) {
printf("nsCSSFrameConstructor::ContentInserted: resulting frame model:\n");
fdbg->List(state.mPresContext, stdout, 0);
}
}
#endif
return NS_OK;
}
nsresult
nsCSSFrameConstructor::ReinsertContent(nsIContent* aContainer,
nsIContent* aChild)
{
PRInt32 ix = aContainer->IndexOf(aChild);
// XXX For now, do a brute force remove and insert.
nsresult res = ContentRemoved(aContainer, aChild, ix, PR_TRUE);
if (NS_SUCCEEDED(res)) {
res = ContentInserted(aContainer, nsnull, aChild, ix, nsnull, PR_TRUE);
}
return res;
}
/**
* Called when a frame subtree is about to be deleted. Two important
* things happen:
*
* 1. For each frame in the subtree, we remove the mapping from the
* content object to its frame
*
* 2. For child frames that have been moved out of the flow, we
* enqueue the out-of-frame for deletion *if* the out-of-flow frame's
* geometric parent is not in |aRemovedFrame|'s hierarchy (e.g., an
* absolutely positioned element that has been promoted to be a direct
* descendant of an area frame).
*
* Note: this function should only be called by DeletingFrameSubtree()
*
* @param aRemovedFrame this is the frame that was removed from the
* content model. As we recurse we need to remember this so we
* can check if out-of-flow frames are a descendent of the frame
* being removed
* @param aFrame the local subtree that is being deleted. This is initially
* the same as aRemovedFrame, but as we recurse down the tree
* this changes
*/
static nsresult
DoDeletingFrameSubtree(nsPresContext* aPresContext,
nsIPresShell* aPresShell,
nsFrameManager* aFrameManager,
nsVoidArray& aDestroyQueue,
nsIFrame* aRemovedFrame,
nsIFrame* aFrame)
{
NS_PRECONDITION(aFrameManager, "no frame manager");
// Remove the mapping from the content object to its frame
nsIContent* content = aFrame->GetContent();
if (content) {
aFrameManager->SetPrimaryFrameFor(content, nsnull);
aFrame->RemovedAsPrimaryFrame(aPresContext);
aFrameManager->ClearAllUndisplayedContentIn(content);
}
// Walk aFrame's child frames
nsIAtom* childListName = nsnull;
PRInt32 childListIndex = 0;
do {
// Walk aFrame's child frames looking for placeholder frames
nsIFrame* childFrame = aFrame->GetFirstChild(childListName);
while (childFrame) {
// The subtree we need to follow to get to the children; by
// default, the childFrame.
nsIFrame* subtree = childFrame;
// See if it's a placeholder frame
if (nsLayoutAtoms::placeholderFrame == childFrame->GetType()) {
// Get the out-of-flow frame
nsIFrame* outOfFlowFrame = ((nsPlaceholderFrame*)childFrame)->GetOutOfFlowFrame();
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
// Remove the mapping from the out-of-flow frame to its placeholder
aFrameManager->UnregisterPlaceholderFrame((nsPlaceholderFrame*)childFrame);
// Destroy the out-of-flow frame only if aRemovedFrame is _not_
// one of its ancestor frames or if it is a popup frame.
// If aRemovedFrame is an ancestor of the out-of-flow frame, then
// the out-of-flow frame will be destroyed by aRemovedFrame.
const nsStyleDisplay* display = outOfFlowFrame->GetStyleDisplay();
if (display->mDisplay == NS_STYLE_DISPLAY_POPUP ||
!nsLayoutUtils::IsProperAncestorFrame(aRemovedFrame, outOfFlowFrame)) {
if (aDestroyQueue.IndexOf(outOfFlowFrame) < 0)
aDestroyQueue.AppendElement(outOfFlowFrame);
}
// We want to descend into the out-of-flow frame's subtree,
// not the placeholder frame's!
subtree = outOfFlowFrame;
}
// Recursively find and delete any of its out-of-flow frames,
// and remove the mapping from content objects to frames
DoDeletingFrameSubtree(aPresContext, aPresShell, aFrameManager, aDestroyQueue,
aRemovedFrame, subtree);
// Get the next sibling child frame
childFrame = childFrame->GetNextSibling();
}
childListName = aFrame->GetAdditionalChildListName(childListIndex++);
} while (childListName);
return NS_OK;
}
/**
* Called when a frame is about to be deleted. Calls DoDeletingFrameSubtree()
* for aFrame and each of its continuing frames
*/
static nsresult
DeletingFrameSubtree(nsPresContext* aPresContext,
nsIPresShell* aPresShell,
nsFrameManager* aFrameManager,
nsIFrame* aFrame)
{
// If there's no frame manager it's probably because the pres shell is
// being destroyed
NS_ENSURE_TRUE(aFrame, NS_OK); // XXXldb Remove this sometime in the future.
if (aFrameManager) {
nsAutoVoidArray destroyQueue;
// If it's a "special" block-in-inline frame, then we need to
// remember to delete our special siblings, too. Since every one of
// the next-in-flows has the same special sibling, just do this
// once, rather than in the loop below.
if (IsFrameSpecial(aFrame)) {
nsIFrame* specialSibling;
GetSpecialSibling(aFrameManager, aFrame, &specialSibling);
if (specialSibling)
DeletingFrameSubtree(aPresContext, aPresShell, aFrameManager,
specialSibling);
}
do {
DoDeletingFrameSubtree(aPresContext, aPresShell, aFrameManager,
destroyQueue, aFrame, aFrame);
// If it's split, then get the continuing frame. Note that we only do
// this for the top-most frame being deleted. Don't do it if we're
// recursing over a subtree, because those continuing frames should be
// found as part of the walk over the top-most frame's continuing frames.
// Walking them again will make this an N^2/2 algorithm
aFrame = aFrame->GetNextInFlow();
} while (aFrame);
// Now destroy any frames that have been enqueued for destruction.
for (PRInt32 i = destroyQueue.Count() - 1; i >= 0; --i) {
nsIFrame* outOfFlowFrame = NS_STATIC_CAST(nsIFrame*, destroyQueue[i]);
#ifdef MOZ_XUL
const nsStyleDisplay* display = outOfFlowFrame->GetStyleDisplay();
if (display->mDisplay == NS_STYLE_DISPLAY_POPUP) {
// Locate the root popup set and remove ourselves from the popup set's list
// of popup frames.
nsIFrame* rootFrame = aFrameManager->GetRootFrame();
if (rootFrame)
rootFrame = rootFrame->GetFirstChild(nsnull);
nsCOMPtr<nsIRootBox> rootBox(do_QueryInterface(rootFrame));
NS_ASSERTION(rootBox, "unexpected null pointer");
if (rootBox) {
nsIFrame* popupSetFrame;
rootBox->GetPopupSetFrame(&popupSetFrame);
NS_ASSERTION(popupSetFrame, "unexpected null pointer");
if (popupSetFrame) {
nsCOMPtr<nsIPopupSetFrame> popupSet(do_QueryInterface(popupSetFrame));
NS_ASSERTION(popupSet, "unexpected null pointer");
if (popupSet)
popupSet->RemovePopupFrame(outOfFlowFrame);
}
}
} else
#endif
{
// Get the out-of-flow frame's parent
nsIFrame* parentFrame = outOfFlowFrame->GetParent();
// Get the child list name for the out-of-flow frame
nsCOMPtr<nsIAtom> listName;
GetChildListNameFor(parentFrame, outOfFlowFrame,
getter_AddRefs(listName));
// Ask the parent to delete the out-of-flow frame
aFrameManager->RemoveFrame(parentFrame,
listName, outOfFlowFrame);
}
}
}
return NS_OK;
}
nsresult
nsCSSFrameConstructor::RemoveMappingsForFrameSubtree(nsIFrame* aRemovedFrame,
nsILayoutHistoryState* aFrameState)
{
// Save the frame tree's state before deleting it
CaptureStateFor(aRemovedFrame, mTempFrameTreeState);
return DeletingFrameSubtree(mPresShell->GetPresContext(), mPresShell,
mPresShell->FrameManager(), aRemovedFrame);
}
nsresult
nsCSSFrameConstructor::ContentRemoved(nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer,
PRBool aInReinsertContent)
{
// XXXldb Do we need to re-resolve style to handle the CSS2 + combinator and
// the :empty pseudo-class?
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::ContentRemoved container=%p child=%p index=%d\n",
NS_STATIC_CAST(void*, aContainer),
NS_STATIC_CAST(void*, aChild),
aIndexInContainer);
if (gReallyNoisyContentUpdates) {
aContainer->List(stdout, 0);
}
}
#endif
nsFrameManager *frameManager = mPresShell->FrameManager();
nsPresContext *presContext = mPresShell->GetPresContext();
nsresult rv = NS_OK;
// Find the child frame that maps the content
nsIFrame* childFrame;
mPresShell->GetPrimaryFrameFor(aChild, &childFrame);
if (! childFrame) {
frameManager->ClearUndisplayedContentIn(aChild, aContainer);
}
// When the last item is removed from a select,
// we need to add a pseudo frame so select gets sized as the best it can
// so here we see if it is a select and then we get the number of options
if (aContainer && childFrame) {
nsCOMPtr<nsIDOMHTMLSelectElement> selectElement = do_QueryInterface(aContainer);
if (selectElement) {
// XXX temp needed only native controls
nsIFrame* selectFrame;
// XXX temp needed only native controls
mPresShell->GetPrimaryFrameFor(aContainer, &selectFrame);
// For "select" add the pseudo frame after the last item is deleted
nsIFrame* parentFrame = childFrame->GetParent();
if (parentFrame && parentFrame != selectFrame) {
nsFrameConstructorState state(mPresShell,
nsnull, nsnull, nsnull);
AddDummyFrameToSelect(state, selectFrame, parentFrame, nsnull,
aContainer, selectElement);
}
}
}
#ifdef MOZ_XUL
if (NotifyListBoxBody(presContext, aContainer, aChild, aIndexInContainer,
mDocument, childFrame, gUseXBLForms, CONTENT_REMOVED))
return NS_OK;
#endif // MOZ_XUL
if (childFrame) {
// If the frame we are manipulating is a special frame then do
// something different instead of just inserting newly created
// frames.
// NOTE: if we are in ReinsertContent,
// then do not reframe as we are already doing just that!
if (IsFrameSpecial(childFrame) && !aInReinsertContent) {
// We are pretty harsh here (and definitely not optimal) -- we
// wipe out the entire containing block and recreate it from
// scratch. The reason is that because we know that a special
// inline frame has propagated some of its children upward to be
// children of the block and that those frames may need to move
// around. This logic guarantees a correct answer.
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::ContentRemoved: childFrame=");
nsFrame::ListTag(stdout, childFrame);
printf(" is special\n");
}
#endif
return ReframeContainingBlock(childFrame);
}
// Get the childFrame's parent frame
nsIFrame* parentFrame = childFrame->GetParent();
// See if we have an XBL insertion point. If so, then that's our
// real parent frame; if not, then the frame hasn't been built yet
// and we just bail.
nsIFrame* insertionPoint;
GetInsertionPoint(parentFrame, aChild, &insertionPoint);
if (! insertionPoint)
return NS_OK;
parentFrame = insertionPoint;
// Examine the containing-block for the removed content and see if
// :first-letter style applies.
nsIFrame* containingBlock = GetFloatContainingBlock(parentFrame);
nsStyleContext* blockSC = containingBlock->GetStyleContext();
nsIContent* blockContent = containingBlock->GetContent();
PRBool haveFLS = HaveFirstLetterStyle(blockContent, blockSC);
if (haveFLS) {
// Trap out to special routine that handles adjusting a blocks
// frame tree when first-letter style is present.
#ifdef NOISY_FIRST_LETTER
printf("ContentRemoved: containingBlock=");
nsFrame::ListTag(stdout, containingBlock);
printf(" parentFrame=");
nsFrame::ListTag(stdout, parentFrame);
printf(" childFrame=");
nsFrame::ListTag(stdout, childFrame);
printf("\n");
#endif
// First update the containing blocks structure by removing the
// existing letter frames. This makes the subsequent logic
// simpler.
RemoveLetterFrames(presContext, mPresShell, frameManager,
containingBlock);
// Recover childFrame and parentFrame
mPresShell->GetPrimaryFrameFor(aChild, &childFrame);
if (!childFrame) {
frameManager->ClearUndisplayedContentIn(aChild, aContainer);
return NS_OK;
}
parentFrame = childFrame->GetParent();
#ifdef NOISY_FIRST_LETTER
printf(" ==> revised parentFrame=");
nsFrame::ListTag(stdout, parentFrame);
printf(" childFrame=");
nsFrame::ListTag(stdout, childFrame);
printf("\n");
#endif
}
#ifdef DEBUG
if (gReallyNoisyContentUpdates) {
printf("nsCSSFrameConstructor::ContentRemoved: childFrame=");
nsFrame::ListTag(stdout, childFrame);
printf("\n");
if (parentFrame) {
nsIFrameDebug* fdbg = nsnull;
CallQueryInterface(parentFrame, &fdbg);
if (fdbg)
fdbg->List(presContext, stdout, 0);
}
else
printf(" ==> no parent frame\n");
}
#endif
// Walk the frame subtree deleting any out-of-flow frames, and
// remove the mapping from content objects to frames
DeletingFrameSubtree(presContext, mPresShell, frameManager, childFrame);
// See if the child frame is a floating frame
// (positioned frames are handled below in the "else" clause)
const nsStyleDisplay* display = childFrame->GetStyleDisplay();
nsPlaceholderFrame* placeholderFrame = nsnull;
if (display->mDisplay == NS_STYLE_DISPLAY_POPUP)
// Get the placeholder frame
placeholderFrame = frameManager->GetPlaceholderFrameFor(childFrame);
if (placeholderFrame) {
// Remove the mapping from the frame to its placeholder
frameManager->UnregisterPlaceholderFrame(placeholderFrame);
// Locate the root popup set and remove ourselves from the popup set's list
// of popup frames.
nsIFrame* rootFrame = frameManager->GetRootFrame();
if (rootFrame)
rootFrame = rootFrame->GetFirstChild(nsnull);
#ifdef MOZ_XUL
nsCOMPtr<nsIRootBox> rootBox(do_QueryInterface(rootFrame));
if (rootBox) {
nsIFrame* popupSetFrame;
rootBox->GetPopupSetFrame(&popupSetFrame);
if (popupSetFrame) {
nsCOMPtr<nsIPopupSetFrame> popupSet(do_QueryInterface(popupSetFrame));
if (popupSet)
popupSet->RemovePopupFrame(childFrame);
}
}
#endif
// Remove the placeholder frame first (XXX second for now) (so
// that it doesn't retain a dangling pointer to memory)
if (placeholderFrame) {
parentFrame = placeholderFrame->GetParent();
DeletingFrameSubtree(presContext, mPresShell, frameManager,
placeholderFrame);
frameManager->RemoveFrame(parentFrame, nsnull, placeholderFrame);
return NS_OK;
}
}
else if (display->IsFloating()) {
#ifdef NOISY_FIRST_LETTER
printf(" ==> child display is still floating!\n");
#endif
// Get the placeholder frame
nsPlaceholderFrame* placeholderFrame =
frameManager->GetPlaceholderFrameFor(childFrame);
// Remove the mapping from the frame to its placeholder
if (placeholderFrame)
frameManager->UnregisterPlaceholderFrame(placeholderFrame);
// Now we remove the floating frame
// XXX has to be done first for now: the blocks line list
// contains an array of pointers to the placeholder - we have to
// remove the float first (which gets rid of the lines
// reference to the placeholder and float) and then remove the
// placeholder
rv = frameManager->RemoveFrame(parentFrame,
nsLayoutAtoms::floatList, childFrame);
// Remove the placeholder frame first (XXX second for now) (so
// that it doesn't retain a dangling pointer to memory)
if (placeholderFrame) {
parentFrame = placeholderFrame->GetParent();
DeletingFrameSubtree(presContext, mPresShell, frameManager,
placeholderFrame);
rv = frameManager->RemoveFrame(parentFrame,
nsnull, placeholderFrame);
}
}
// See if it's absolutely or fixed positioned
else if (display->IsAbsolutelyPositioned()) {
// Get the placeholder frame
nsPlaceholderFrame* placeholderFrame =
frameManager->GetPlaceholderFrameFor(childFrame);
// Remove the mapping from the frame to its placeholder
if (placeholderFrame)
frameManager->UnregisterPlaceholderFrame(placeholderFrame);
// Generate two notifications. First for the absolutely positioned
// frame
rv = frameManager->RemoveFrame(parentFrame,
(NS_STYLE_POSITION_FIXED == display->mPosition) ?
nsLayoutAtoms::fixedList : nsLayoutAtoms::absoluteList, childFrame);
// Now the placeholder frame
if (placeholderFrame) {
parentFrame = placeholderFrame->GetParent();
rv = frameManager->RemoveFrame(parentFrame, nsnull,
placeholderFrame);
}
} else {
// Notify the parent frame that it should delete the frame
// check for a table caption which goes on an additional child list with a different parent
nsIFrame* outerTableFrame;
if (GetCaptionAdjustedParent(parentFrame, childFrame, &outerTableFrame)) {
rv = frameManager->RemoveFrame(outerTableFrame,
nsLayoutAtoms::captionList,
childFrame);
}
else {
rv = frameManager->RemoveFrame(insertionPoint, nsnull, childFrame);
}
}
if (mInitialContainingBlock == childFrame) {
mInitialContainingBlock = nsnull;
}
if (haveFLS && mInitialContainingBlock) {
nsFrameConstructorState state(mPresShell, mFixedContainingBlock,
GetAbsoluteContainingBlock(parentFrame),
GetFloatContainingBlock(parentFrame));
RecoverLetterFrames(state, containingBlock);
}
#ifdef DEBUG
if (gReallyNoisyContentUpdates && parentFrame) {
nsIFrameDebug* fdbg = nsnull;
CallQueryInterface(parentFrame, &fdbg);
if (fdbg) {
printf("nsCSSFrameConstructor::ContentRemoved: resulting frame model:\n");
fdbg->List(presContext, stdout, 0);
}
}
#endif
}
return rv;
}
#ifdef DEBUG
// To ensure that the functions below are only called within
// |ApplyRenderingChangeToTree|.
static PRBool gInApplyRenderingChangeToTree = PR_FALSE;
#endif
static void
DoApplyRenderingChangeToTree(nsPresContext* aPresContext,
nsIFrame* aFrame,
nsIViewManager* aViewManager,
nsFrameManager* aFrameManager,
nsChangeHint aChange);
/**
* @param aBoundsRect returns the bounds enclosing the areas covered by aFrame and its childre
* This rect is relative to aFrame's parent
*/
static void
UpdateViewsForTree(nsPresContext* aPresContext, nsIFrame* aFrame,
nsIViewManager* aViewManager, nsFrameManager* aFrameManager,
nsRect& aBoundsRect, nsChangeHint aChange)
{
NS_PRECONDITION(gInApplyRenderingChangeToTree,
"should only be called within ApplyRenderingChangeToTree");
nsIView* view = aFrame->GetView();
if (view) {
if (aChange & nsChangeHint_RepaintFrame) {
aViewManager->UpdateView(view, NS_VMREFRESH_NO_SYNC);
}
if (aChange & nsChangeHint_SyncFrameView) {
nsContainerFrame::SyncFrameViewProperties(aPresContext, aFrame, nsnull, view);
}
}
nsRect bounds = aFrame->GetOverflowRect();
// now do children of frame
PRInt32 listIndex = 0;
nsIAtom* childList = nsnull;
do {
nsIFrame* child = aFrame->GetFirstChild(childList);
while (child) {
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
// only do frames that are in flow
if (nsLayoutAtoms::placeholderFrame == child->GetType()) { // placeholder
// get out of flow frame and start over there
nsIFrame* outOfFlowFrame = ((nsPlaceholderFrame*)child)->GetOutOfFlowFrame();
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
DoApplyRenderingChangeToTree(aPresContext, outOfFlowFrame,
aViewManager, aFrameManager, aChange);
}
else { // regular frame
nsRect childBounds;
UpdateViewsForTree(aPresContext, child, aViewManager, aFrameManager, childBounds, aChange);
bounds.UnionRect(bounds, childBounds);
}
}
child = child->GetNextSibling();
}
childList = aFrame->GetAdditionalChildListName(listIndex++);
} while (childList);
nsPoint parentOffset = aFrame->GetPosition();
aBoundsRect = bounds + parentOffset;
}
static void
DoApplyRenderingChangeToTree(nsPresContext* aPresContext,
nsIFrame* aFrame,
nsIViewManager* aViewManager,
nsFrameManager* aFrameManager,
nsChangeHint aChange)
{
NS_PRECONDITION(gInApplyRenderingChangeToTree,
"should only be called within ApplyRenderingChangeToTree");
for ( ; aFrame; aFrame = GetNifOrSpecialSibling(aFrameManager, aFrame)) {
// Get view if this frame has one and trigger an update. If the
// frame doesn't have a view, find the nearest containing view
// (adjusting r's coordinate system to reflect the nesting) and
// update there.
nsRect invalidRect;
UpdateViewsForTree(aPresContext, aFrame, aViewManager, aFrameManager,
invalidRect, aChange);
if (!aFrame->HasView()
&& (aChange & nsChangeHint_RepaintFrame)) {
// if frame has view, will already be invalidated
invalidRect -= aFrame->GetPosition();
aFrame->Invalidate(invalidRect, PR_FALSE);
}
}
}
static void
ApplyRenderingChangeToTree(nsPresContext* aPresContext,
nsIFrame* aFrame,
nsIViewManager* aViewManager,
nsChangeHint aChange)
{
nsIPresShell *shell = aPresContext->PresShell();
PRBool isPaintingSuppressed = PR_FALSE;
shell->IsPaintingSuppressed(&isPaintingSuppressed);
if (isPaintingSuppressed) {
// Don't allow synchronous rendering changes when painting is turned off.
aChange = NS_SubtractHint(aChange, nsChangeHint_RepaintFrame);
if (!aChange) {
return;
}
}
// If the frame's background is propagated to an ancestor, walk up to
// that ancestor.
const nsStyleBackground *bg;
PRBool isCanvas;
while (!nsCSSRendering::FindBackground(aPresContext, aFrame,
&bg, &isCanvas)) {
aFrame = aFrame->GetParent();
NS_ASSERTION(aFrame, "root frame must paint");
}
nsIViewManager* viewManager = aViewManager;
if (!viewManager) {
viewManager = aPresContext->GetViewManager();
}
// Trigger rendering updates by damaging this frame and any
// continuations of this frame.
// XXX this needs to detect the need for a view due to an opacity change and deal with it...
viewManager->BeginUpdateViewBatch();
#ifdef DEBUG
gInApplyRenderingChangeToTree = PR_TRUE;
#endif
DoApplyRenderingChangeToTree(aPresContext, aFrame, viewManager,
shell->FrameManager(), aChange);
#ifdef DEBUG
gInApplyRenderingChangeToTree = PR_FALSE;
#endif
// Use NS_VMREFRESH_DEFERRED here so that any reflows that may be coming from
// the same restyle as called this function will get a chance to be processed
// before we do the widget invalidates from DoApplyRenderingChangeToTree.
viewManager->EndUpdateViewBatch(NS_VMREFRESH_DEFERRED);
}
nsresult
nsCSSFrameConstructor::StyleChangeReflow(nsIFrame* aFrame,
nsIAtom* aAttribute)
{
// If the frame hasn't even received an initial reflow, then don't
// send it a style-change reflow!
if (aFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW)
return NS_OK;
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::StyleChangeReflow: aFrame=");
nsFrame::ListTag(stdout, aFrame);
printf("\n");
}
#endif
// Is it a box? If so we can coelesce.
if (aFrame->IsBoxFrame()) {
nsBoxLayoutState state(mPresShell->GetPresContext());
aFrame->MarkStyleChange(state);
}
else {
// If the frame is part of a split block-in-inline hierarchy, then
// target the style-change reflow at the first ``normal'' ancestor
// so we're sure that the style change will propagate to any
// anonymously created siblings.
if (IsFrameSpecial(aFrame))
aFrame = GetIBContainingBlockFor(aFrame);
// Target a style-change reflow at the frame.
mPresShell->AppendReflowCommand(aFrame, eReflowType_StyleChanged, nsnull);
}
return NS_OK;
}
nsresult
nsCSSFrameConstructor::CharacterDataChanged(nsIContent* aContent,
PRBool aAppend)
{
nsresult rv = NS_OK;
// Find the child frame
nsIFrame* frame;
mPresShell->GetPrimaryFrameFor(aContent, &frame);
// Notify the first frame that maps the content. It will generate a reflow
// command
// It's possible the frame whose content changed isn't inserted into the
// frame hierarchy yet, or that there is no frame that maps the content
if (nsnull != frame) {
#if 0
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("nsCSSFrameConstructor::CharacterDataChanged: content=%p[%s] subcontent=%p frame=%p",
aContent, ContentTag(aContent, 0),
aSubContent, frame));
#endif
// Special check for text content that is a child of a letter
// frame. There are two interesting cases that we have to handle
// carefully: text content that is going empty (which means we
// should select a new text node as the first-letter text) or text
// content that empty but is no longer empty (it might be the
// first-letter text but isn't currently).
//
// To deal with both of these we make a simple change: map a
// CharacterDataChanged into a ReinsertContent when we are changing text
// that is part of a first-letter situation.
PRBool doCharacterDataChanged = PR_TRUE;
nsCOMPtr<nsITextContent> textContent(do_QueryInterface(aContent));
if (textContent) {
// Ok, it's text content. Now do some real work...
nsIFrame* block = GetFloatContainingBlock(frame);
if (block) {
// See if the block has first-letter style applied to it.
nsIContent* blockContent = block->GetContent();
nsStyleContext* blockSC = block->GetStyleContext();
PRBool haveFirstLetterStyle =
HaveFirstLetterStyle(blockContent, blockSC);
if (haveFirstLetterStyle) {
// The block has first-letter style. Use content-replaced to
// repair the blocks frame structure properly.
nsCOMPtr<nsIContent> container = aContent->GetParent();
if (container) {
doCharacterDataChanged = PR_FALSE;
rv = ReinsertContent(container, aContent);
}
}
}
}
if (doCharacterDataChanged) {
frame->CharacterDataChanged(mPresShell->GetPresContext(), aContent,
aAppend);
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::ProcessRestyledFrames(nsStyleChangeList& aChangeList)
{
PRInt32 count = aChangeList.Count();
if (!count)
return NS_OK;
nsPropertyTable *propTable = mPresShell->GetPresContext()->PropertyTable();
// Mark frames so that we skip frames that die along the way, bug 123049.
// A frame can be in the list multiple times with different hints. Further
// optmization is possible if nsStyleChangeList::AppendChange could coalesce
PRInt32 index = count;
while (0 <= --index) {
const nsStyleChangeData* changeData;
aChangeList.ChangeAt(index, &changeData);
if (changeData->mFrame) {
propTable->SetProperty(changeData->mFrame,
nsLayoutAtoms::changeListProperty,
nsnull, nsnull, nsnull);
}
}
index = count;
while (0 <= --index) {
nsIFrame* frame;
nsIContent* content;
nsChangeHint hint;
aChangeList.ChangeAt(index, frame, content, hint);
// skip any frame that has been destroyed due to a ripple effect
if (frame) {
nsresult res;
propTable->GetProperty(frame, nsLayoutAtoms::changeListProperty, &res);
if (NS_PROPTABLE_PROP_NOT_THERE == res)
continue;
}
if (hint & nsChangeHint_ReconstructFrame) {
RecreateFramesForContent(content);
} else {
NS_ASSERTION(frame, "This shouldn't happen");
if (hint & nsChangeHint_ReflowFrame) {
StyleChangeReflow(frame, nsnull);
}
if (hint & (nsChangeHint_RepaintFrame | nsChangeHint_SyncFrameView)) {
ApplyRenderingChangeToTree(mPresShell->GetPresContext(), frame, nsnull,
hint);
}
if (hint & nsChangeHint_UpdateCursor) {
nsIViewManager* viewMgr = mPresShell->GetViewManager();
if (viewMgr)
viewMgr->SynthesizeMouseMove(PR_FALSE);
}
}
#ifdef DEBUG
// reget from content since it may have been regenerated...
if (content) {
nsIFrame* frame;
mPresShell->GetPrimaryFrameFor(content, &frame);
if (frame) {
mPresShell->FrameManager()->DebugVerifyStyleTree(frame);
}
} else {
NS_WARNING("Unable to test style tree integrity -- no content node");
}
#endif
}
// cleanup references
index = count;
while (0 <= --index) {
const nsStyleChangeData* changeData;
aChangeList.ChangeAt(index, &changeData);
if (changeData->mFrame) {
propTable->DeleteProperty(changeData->mFrame,
nsLayoutAtoms::changeListProperty);
}
}
aChangeList.Clear();
return NS_OK;
}
void
nsCSSFrameConstructor::RestyleElement(nsIContent *aContent,
nsIFrame *aPrimaryFrame,
nsChangeHint aMinHint)
{
if (aMinHint & nsChangeHint_ReconstructFrame) {
RecreateFramesForContent(aContent);
} else if (aPrimaryFrame) {
nsStyleChangeList changeList;
if (aMinHint) {
changeList.AppendChange(aPrimaryFrame, aContent, aMinHint);
}
nsChangeHint frameChange = mPresShell->FrameManager()->
ComputeStyleChangeFor(aPrimaryFrame, &changeList, aMinHint);
if (frameChange & nsChangeHint_ReconstructFrame) {
RecreateFramesForContent(aContent);
changeList.Clear();
} else {
ProcessRestyledFrames(changeList);
}
} else {
// no frames, reconstruct for content
MaybeRecreateFramesForContent(aContent);
}
}
void
nsCSSFrameConstructor::RestyleLaterSiblings(nsIContent *aContent)
{
nsIContent *parent = aContent->GetParent();
if (!parent)
return; // root element has no later siblings
for (PRInt32 index = parent->IndexOf(aContent) + 1,
index_end = parent->GetChildCount();
index != index_end; ++index) {
nsIContent *child = parent->GetChildAt(index);
if (!child->IsContentOfType(nsIContent::eELEMENT))
continue;
nsIFrame* primaryFrame = nsnull;
mPresShell->GetPrimaryFrameFor(child, &primaryFrame);
RestyleElement(child, primaryFrame, NS_STYLE_HINT_NONE);
}
}
nsresult
nsCSSFrameConstructor::ContentStatesChanged(nsIContent* aContent1,
nsIContent* aContent2,
PRInt32 aStateMask)
{
DoContentStateChanged(aContent1, aStateMask);
DoContentStateChanged(aContent2, aStateMask);
return NS_OK;
}
void
nsCSSFrameConstructor::DoContentStateChanged(nsIContent* aContent,
PRInt32 aStateMask)
{
nsStyleSet *styleSet = mPresShell->StyleSet();
nsPresContext *presContext = mPresShell->GetPresContext();
NS_ASSERTION(styleSet, "couldn't get style set");
if (aContent) {
nsIFrame* primaryFrame = nsnull;
mPresShell->GetPrimaryFrameFor(aContent, &primaryFrame);
if (primaryFrame) {
PRUint8 app = primaryFrame->GetStyleDisplay()->mAppearance;
if (app) {
nsITheme *theme = presContext->GetTheme();
if (theme && theme->ThemeSupportsWidget(presContext,
primaryFrame, app)) {
PRBool repaint = PR_FALSE;
theme->WidgetStateChanged(primaryFrame, app, nsnull, &repaint);
if (repaint) {
ApplyRenderingChangeToTree(presContext, primaryFrame, nsnull,
nsChangeHint_RepaintFrame);
}
}
}
}
nsReStyleHint rshint =
styleSet->HasStateDependentStyle(presContext, aContent, aStateMask);
PostRestyleEvent(aContent, rshint, NS_STYLE_HINT_NONE);
}
}
nsresult
nsCSSFrameConstructor::AttributeChanged(nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
nsresult result = NS_OK;
// Hold onto the PresShell to prevent ourselves from being destroyed.
// XXXbz how, exactly, would this attribute change cause us to be
// destroyed from inside this function?
nsCOMPtr<nsIPresShell> shell = mPresShell;
// Get the frame associated with the content which is the highest in the frame tree
nsIFrame* primaryFrame;
shell->GetPrimaryFrameFor(aContent, &primaryFrame);
#if 0
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("HTMLStyleSheet::AttributeChanged: content=%p[%s] frame=%p",
aContent, ContentTag(aContent, 0), frame));
#endif
// the style tag has its own interpretation based on aHint
nsChangeHint hint = NS_STYLE_HINT_NONE;
nsCOMPtr<nsIStyledContent> styledContent = do_QueryInterface(aContent);
if (styledContent) {
// Get style hint from HTML content object.
hint = styledContent->GetAttributeChangeHint(aAttribute, aModType);
}
PRBool reframe = (hint & nsChangeHint_ReconstructFrame) != 0;
#ifdef MOZ_XUL
// The following listbox widget trap prevents offscreen listbox widget
// content from being removed and re-inserted (which is what would
// happen otherwise).
if (!primaryFrame && !reframe) {
PRInt32 namespaceID;
nsCOMPtr<nsIAtom> tag;
mDocument->BindingManager()->ResolveTag(aContent, &namespaceID,
getter_AddRefs(tag));
if (namespaceID == kNameSpaceID_XUL &&
(tag == nsXULAtoms::listitem ||
tag == nsXULAtoms::listcell))
return NS_OK;
}
if (aAttribute == nsXULAtoms::tooltiptext ||
aAttribute == nsXULAtoms::tooltip)
{
nsIFrame* rootFrame = shell->FrameManager()->GetRootFrame();
if (rootFrame)
rootFrame = rootFrame->GetFirstChild(nsnull);
nsCOMPtr<nsIRootBox> rootBox(do_QueryInterface(rootFrame));
if (rootBox) {
if (aModType == nsIDOMMutationEvent::REMOVAL)
rootBox->RemoveTooltipSupport(aContent);
if (aModType == nsIDOMMutationEvent::ADDITION)
rootBox->AddTooltipSupport(aContent);
}
}
#endif // MOZ_XUL
// See if we have appearance information for a theme.
if (primaryFrame) {
const nsStyleDisplay* disp = primaryFrame->GetStyleDisplay();
if (disp->mAppearance) {
nsPresContext* presContext = mPresShell->GetPresContext();
nsITheme *theme = presContext->GetTheme();
if (theme && theme->ThemeSupportsWidget(presContext, primaryFrame, disp->mAppearance)) {
PRBool repaint = PR_FALSE;
theme->WidgetStateChanged(primaryFrame, disp->mAppearance, aAttribute, &repaint);
if (repaint)
ApplyRenderingChangeToTree(presContext, primaryFrame, nsnull, nsChangeHint_RepaintFrame);
}
}
}
nsFrameManager *frameManager = shell->FrameManager();
nsReStyleHint rshint = frameManager->HasAttributeDependentStyle(aContent,
aAttribute,
aModType);
// let the frame deal with it now, so we don't have to deal later
if (primaryFrame) {
result = primaryFrame->AttributeChanged(aContent, aNameSpaceID,
aAttribute, aModType);
// XXXwaterson should probably check for special IB siblings
// here, and propagate the AttributeChanged notification to
// them, as well. Currently, inline frames don't do anything on
// this notification, so it's not that big a deal.
}
// Menus and such can't deal with asynchronous changes of display when the
// menugenerated attribute changes, so make sure to process that immediately
if (aNameSpaceID == kNameSpaceID_None &&
aAttribute == nsXULAtoms::menugenerated) {
PRInt32 namespaceID;
nsCOMPtr<nsIAtom> tag;
mDocument->BindingManager()->ResolveTag(aContent, &namespaceID,
getter_AddRefs(tag));
if (namespaceID == kNameSpaceID_XUL &&
(tag == nsXULAtoms::menupopup || tag == nsXULAtoms::popup ||
tag == nsXULAtoms::tooltip)) {
ProcessOneRestyle(aContent, rshint, hint);
return result;
}
}
PostRestyleEvent(aContent, rshint, hint);
return result;
}
void
nsCSSFrameConstructor::EndUpdate()
{
if (--mUpdateCount == 0) {
if (mQuotesDirty) {
mQuoteList.RecalcAll();
mQuotesDirty = PR_FALSE;
}
}
}
void
nsCSSFrameConstructor::WillDestroyFrameTree()
{
// Prevent frame tree destruction from being O(N^2)
mQuoteList.Clear();
// Cancel all pending reresolves
mRestyleEventQueue = nsnull;
nsCOMPtr<nsIEventQueue> eventQueue;
mEventQueueService->GetSpecialEventQueue(nsIEventQueueService::UI_THREAD_EVENT_QUEUE,
getter_AddRefs(eventQueue));
eventQueue->RevokeEvents(this);
}
//STATIC
void nsCSSFrameConstructor::GetAlternateTextFor(nsIContent* aContent,
nsIAtom* aTag, // content object's tag
nsXPIDLString& aAltText)
{
nsresult rv;
// The "alt" attribute specifies alternate text that is rendered
// when the image can not be displayed
rv = aContent->GetAttr(kNameSpaceID_None, nsHTMLAtoms::alt, aAltText);
// If there's no "alt" attribute, and aContent is an input
// element, then use the value of the "value" attribute
if ((NS_CONTENT_ATTR_NOT_THERE == rv) && (nsHTMLAtoms::input == aTag)) {
rv = aContent->GetAttr(kNameSpaceID_None, nsHTMLAtoms::value,
aAltText);
// If there's no "value" attribute either, then use the localized string
// for "Submit" as the alternate text.
if (NS_CONTENT_ATTR_NOT_THERE == rv) {
nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES,
"Submit", aAltText);
}
}
}
// Construct an alternate frame to use when the image can't be rendered
nsresult
nsCSSFrameConstructor::ConstructAlternateFrame(nsIContent* aContent,
nsStyleContext* aStyleContext,
nsIFrame* aGeometricParent,
nsIFrame* aContentParent,
nsIFrame*& aFrame)
{
nsresult rv;
nsXPIDLString altText;
// Initialize OUT parameter
aFrame = nsnull;
// Get the alternate text to use
GetAlternateTextFor(aContent, aContent->Tag(), altText);
// Create a text content element for the alternate text
nsCOMPtr<nsITextContent> altTextContent;
rv = NS_NewTextNode(getter_AddRefs(altTextContent));
if (NS_FAILED(rv))
return rv;
// Set the content's text
altTextContent->SetText(altText, PR_TRUE);
// Set aContent as the parent content.
altTextContent->SetParent(aContent);
altTextContent->SetDocument(mDocument, PR_TRUE, PR_TRUE);
// Create either an inline frame, block frame, or area frame
nsIFrame* containerFrame;
PRBool isOutOfFlow = PR_FALSE;
const nsStyleDisplay* display = aStyleContext->GetStyleDisplay();
if (display->IsAbsolutelyPositioned()) {
NS_NewAbsoluteItemWrapperFrame(mPresShell, &containerFrame);
isOutOfFlow = PR_TRUE;
} else if (display->IsFloating()) {
NS_NewFloatingItemWrapperFrame(mPresShell, &containerFrame);
isOutOfFlow = PR_TRUE;
} else if (NS_STYLE_DISPLAY_BLOCK == display->mDisplay) {
NS_NewBlockFrame(mPresShell, &containerFrame);
} else {
NS_NewInlineFrame(mPresShell, &containerFrame);
}
nsPresContext* presContext = mPresShell->GetPresContext();
containerFrame->Init(presContext, aContent, aGeometricParent, aStyleContext,
nsnull);
nsHTMLContainerFrame::CreateViewForFrame(containerFrame, aContentParent,
PR_FALSE);
// If the frame is out-of-flow, then mark it as such
if (isOutOfFlow) {
containerFrame->AddStateBits(NS_FRAME_OUT_OF_FLOW);
}
// Create a text frame to display the alt-text. It gets a pseudo-element
// style context
nsIFrame* textFrame;
NS_NewTextFrame(mPresShell, &textFrame);
nsRefPtr<nsStyleContext> textStyleContext;
textStyleContext = mPresShell->StyleSet()->
ResolveStyleForNonElement(aStyleContext);
textFrame->Init(presContext, altTextContent, containerFrame,
textStyleContext, nsnull);
containerFrame->SetInitialChildList(presContext, nsnull, textFrame);
// Return the container frame
aFrame = containerFrame;
return NS_OK;
}
#ifdef NS_DEBUG
static PRBool
IsPlaceholderFrame(nsIFrame* aFrame)
{
return aFrame->GetType() == nsLayoutAtoms::placeholderFrame;
}
#endif
static PRBool
HasDisplayableChildren(nsIFrame* aContainerFrame)
{
// Returns 'true' if there are frames within aContainerFrame that
// could be displayed in the frame list.
NS_PRECONDITION(aContainerFrame != nsnull, "null ptr");
if (! aContainerFrame)
return PR_FALSE;
nsIFrame* frame = aContainerFrame->GetFirstChild(nsnull);
while (frame) {
// If it's not a text frame, then assume that it's displayable.
if (frame->GetType() != nsLayoutAtoms::textFrame)
return PR_TRUE;
// If not only whitespace, then we have displayable content here.
if (! IsOnlyWhitespace(frame->GetContent()))
return PR_TRUE;
// Otherwise, on to the next frame...
frame = frame->GetNextSibling();
}
// If we get here, then we've iterated through all the child frames,
// and every one is a text frame containing whitespace. (Or, there
// weren't any frames at all!) There is nothing to diplay.
return PR_FALSE;
}
nsresult
nsCSSFrameConstructor::CantRenderReplacedElement(nsIFrame* aFrame)
{
nsresult rv = NS_OK;
// Get parent frame and style context
nsIFrame* parentFrame = aFrame->GetParent();
nsStyleContext* styleContext = aFrame->GetStyleContext();
// Get aFrame's content object and the tag name
nsIAtom* tag;
nsIContent* content = aFrame->GetContent();
NS_ASSERTION(content, "null content object");
tag = content->Tag();
// Get the child list name that the frame is contained in
nsCOMPtr<nsIAtom> listName;
GetChildListNameFor(parentFrame, aFrame, getter_AddRefs(listName));
// If the frame is out of the flow, then it has a placeholder frame.
nsPlaceholderFrame* placeholderFrame = nsnull;
if (listName) {
mPresShell->GetPlaceholderFrameFor(aFrame, (nsIFrame**) &placeholderFrame);
}
// Get the previous sibling frame
nsFrameList frameList(parentFrame->GetFirstChild(listName));
// See whether it's an IMG or an INPUT element (for image buttons)
// or if it is an applet with no displayable children
// XXX need to check nameSpaceID in these spots
if (nsHTMLAtoms::img == tag || nsHTMLAtoms::input == tag ||
(nsHTMLAtoms::applet == tag && !HasDisplayableChildren(aFrame))) {
// Try and construct an alternate frame to use when the
// image can't be rendered
nsIFrame* newFrame;
rv = ConstructAlternateFrame(content, styleContext,
parentFrame, nsnull, newFrame);
if (NS_SUCCEEDED(rv)) {
nsFrameManager *frameManager = mPresShell->FrameManager();
// Replace the old frame with the new frame
DeletingFrameSubtree(mPresShell->GetPresContext(), mPresShell,
frameManager, aFrame);
// Reset the primary frame mapping
frameManager->SetPrimaryFrameFor(content, newFrame);
// Replace the old frame with the new frame
// XXXbz If this fails, we leak the content node newFrame points to!
frameManager->ReplaceFrame(parentFrame, listName, aFrame, newFrame);
// Now that we've replaced the primary frame, if there's a placeholder
// frame then complete the transition from image frame to new frame
if (placeholderFrame) {
// Remove the association between the old frame and its placeholder
frameManager->UnregisterPlaceholderFrame(placeholderFrame);
// Placeholder frames have a pointer back to the out-of-flow frame.
// Make sure that's correct, too.
placeholderFrame->SetOutOfFlowFrame(newFrame);
// Reuse the existing placeholder frame, and add an association to the
// new frame
frameManager->RegisterPlaceholderFrame(placeholderFrame);
// XXX Work around a bug in the block code where the float won't get
// reflowed unless the line containing the placeholder frame is reflowed...
placeholderFrame->GetParent()->
ReflowDirtyChild(mPresShell, placeholderFrame);
}
}
} else if ((nsHTMLAtoms::object == tag) ||
(nsHTMLAtoms::embed == tag) ||
(nsHTMLAtoms::applet == tag)) {
// It's an OBJECT, EMBED, or APPLET, so we should display the contents
// instead
nsIFrame* absoluteContainingBlock;
nsIFrame* floatContainingBlock;
nsIFrame* inFlowParent = parentFrame;
// If the OBJECT frame is out-of-flow, then get the placeholder frame's
// parent and use that when determining the absolute containing block and
// float containing block
if (placeholderFrame) {
inFlowParent = placeholderFrame->GetParent();
}
absoluteContainingBlock = GetAbsoluteContainingBlock(inFlowParent);
floatContainingBlock = GetFloatContainingBlock(inFlowParent);
#ifdef NS_DEBUG
// Verify that we calculated the same containing block
if (listName == nsLayoutAtoms::absoluteList) {
NS_ASSERTION(absoluteContainingBlock == parentFrame,
"wrong absolute containing block");
} else if (listName == nsLayoutAtoms::floatList) {
NS_ASSERTION(floatContainingBlock == parentFrame,
"wrong float containing block");
}
#endif
// Now initialize the frame construction state
nsFrameConstructorState state(mPresShell, mFixedContainingBlock,
absoluteContainingBlock,
floatContainingBlock);
nsFrameItems frameItems;
const nsStyleDisplay* display = styleContext->GetStyleDisplay();
// Create a new frame based on the display type.
// Note: if the old frame was out-of-flow, then so will the new frame
// and we'll get a new placeholder frame
// XXXbz handle pseudos? Just trying to do it here doesn't quite work
// because of the list-munging we end up doing later in this function....
rv = ConstructFrameByDisplayType(state, display,
content, content->GetNameSpaceID(), tag,
inFlowParent, styleContext, frameItems,
PR_FALSE);
if (NS_FAILED(rv)) return rv;
nsIFrame* newFrame = frameItems.childList;
if (NS_SUCCEEDED(rv)) {
if (placeholderFrame) {
// Remove the association between the old frame and its placeholder
// Note: ConstructFrameByDisplayType() will already have added an
// association for the new placeholder frame
state.mFrameManager->UnregisterPlaceholderFrame(placeholderFrame);
// Verify that the new frame is also a placeholder frame
NS_ASSERTION(IsPlaceholderFrame(newFrame), "unexpected frame type");
// Replace the old placeholder frame with the new placeholder frame
state.mFrameManager->ReplaceFrame(inFlowParent, nsnull,
placeholderFrame, newFrame);
}
// Replace the primary frame
if (listName == nsnull) {
if (IsInlineFrame(parentFrame) && !AreAllKidsInline(newFrame)) {
// We're in the uncomfortable position of being an inline
// that now contains a block. As in ConstructInline(), break
// the newly constructed frames into three lists: the inline
// frames before the first block frame (list1), the inline
// frames after the last block frame (list3), and all the
// frames between the first and last block frames (list2).
nsIFrame* list1 = newFrame;
nsIFrame* prevToFirstBlock;
nsIFrame* list2 = FindFirstBlock(list1, &prevToFirstBlock);
NS_ASSERTION(list2, "Why did we get into this code?");
if (prevToFirstBlock)
prevToFirstBlock->SetNextSibling(nsnull);
else list1 = nsnull;
nsIFrame* afterFirstBlock = list2->GetNextSibling();
nsIFrame* lastBlock = FindLastBlock(afterFirstBlock);
if (! lastBlock)
lastBlock = list2;
nsIFrame* list3 = lastBlock->GetNextSibling();
lastBlock->SetNextSibling(nsnull);
// Create "special" inline-block linkage between the frames
// XXXldb Do we really need to do this? It doesn't seem
// consistent with the use in ConstructInline.
SetFrameIsSpecial(list1, list2);
SetFrameIsSpecial(list2, list3);
if (list3) {
SetFrameIsSpecial(list3, nsnull);
}
// Recursively split inlines back up to the first containing
// block frame.
SplitToContainingBlock(state, parentFrame, list1, list2, list3,
PR_FALSE);
}
} else if (listName == nsLayoutAtoms::absoluteList) {
newFrame = state.mAbsoluteItems.childList;
state.mAbsoluteItems.childList = nsnull;
} else if (listName == nsLayoutAtoms::fixedList) {
newFrame = state.mFixedItems.childList;
state.mFixedItems.childList = nsnull;
} else if (listName == nsLayoutAtoms::floatList) {
newFrame = state.mFloatedItems.childList;
state.mFloatedItems.childList = nsnull;
}
DeletingFrameSubtree(state.mPresContext, mPresShell,
state.mFrameManager, aFrame);
state.mFrameManager->ReplaceFrame(parentFrame, listName, aFrame,
newFrame);
// Reset the primary frame mapping. Don't assume that
// ConstructFrameByDisplayType() has done this
state.mFrameManager->SetPrimaryFrameFor(content, newFrame);
}
} else if (nsHTMLAtoms::input == tag) {
// XXX image INPUT elements are also image frames, but don't throw away the
// image frame, because the frame class has extra logic that is specific to
// INPUT elements
} else {
NS_ASSERTION(PR_FALSE, "unexpected tag");
}
return rv;
}
nsresult
nsCSSFrameConstructor::CreateContinuingOuterTableFrame(nsIPresShell* aPresShell,
nsPresContext* aPresContext,
nsIFrame* aFrame,
nsIFrame* aParentFrame,
nsIContent* aContent,
nsStyleContext* aStyleContext,
nsIFrame** aContinuingFrame)
{
nsIFrame* newFrame;
nsresult rv;
rv = NS_NewTableOuterFrame(aPresShell, &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, aContent, aParentFrame, aStyleContext, aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
// Create a continuing inner table frame, and if there's a caption then
// replicate the caption
nsFrameItems newChildFrames;
nsIFrame* childFrame = aFrame->GetFirstChild(nsnull);
while (childFrame) {
// See if it's the inner table frame
if (nsLayoutAtoms::tableFrame == childFrame->GetType()) {
nsIFrame* continuingTableFrame;
// It's the inner table frame, so create a continuing frame
CreateContinuingFrame(aPresContext, childFrame, newFrame, &continuingTableFrame);
newChildFrames.AddChild(continuingTableFrame);
} else {
// XXX remove this code and the above checks. We don't want to replicate
// the caption (that is what the thead is for). This code is not executed
// anyway, because the caption was put in a different child list.
nsStyleContext* captionStyle = childFrame->GetStyleContext();
nsIContent* caption = childFrame->GetContent();
NS_ASSERTION(NS_STYLE_DISPLAY_TABLE_CAPTION ==
captionStyle->GetStyleDisplay()->mDisplay,
"expected caption");
// Replicate the caption frame
// XXX We have to do it this way instead of calling ConstructFrameByDisplayType(),
// because of a bug in the way ConstructTableFrame() handles the initial child
// list...
nsIFrame* captionFrame;
nsFrameItems childItems;
NS_NewTableCaptionFrame(aPresShell, &captionFrame);
nsFrameConstructorState state(mPresShell, mFixedContainingBlock,
GetAbsoluteContainingBlock(newFrame),
captionFrame);
captionFrame->Init(aPresContext, caption, newFrame, captionStyle, nsnull);
ProcessChildren(state, caption, captionFrame, PR_TRUE, childItems,
PR_TRUE);
captionFrame->SetInitialChildList(aPresContext, nsnull, childItems.childList);
newChildFrames.AddChild(captionFrame);
}
childFrame = childFrame->GetNextSibling();
}
// Set the outer table's initial child list
newFrame->SetInitialChildList(aPresContext, nsnull, newChildFrames.childList);
}
*aContinuingFrame = newFrame;
return rv;
}
nsresult
nsCSSFrameConstructor::CreateContinuingTableFrame(nsIPresShell* aPresShell,
nsPresContext* aPresContext,
nsIFrame* aFrame,
nsIFrame* aParentFrame,
nsIContent* aContent,
nsStyleContext* aStyleContext,
nsIFrame** aContinuingFrame)
{
nsIFrame* newFrame;
nsresult rv;
rv = NS_NewTableFrame(aPresShell, &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, aContent, aParentFrame, aStyleContext, aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
// Replicate any header/footer frames
nsFrameItems childFrames;
nsIFrame* rowGroupFrame = aFrame->GetFirstChild(nsnull);
while (rowGroupFrame) {
// See if it's a header/footer
nsStyleContext* rowGroupStyle = rowGroupFrame->GetStyleContext();
const nsStyleDisplay* display = rowGroupStyle->GetStyleDisplay();
if ((NS_STYLE_DISPLAY_TABLE_HEADER_GROUP == display->mDisplay) ||
(NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP == display->mDisplay)) {
// If the row group has was continued, then don't replicate it
nsIFrame* rgNextInFlow = rowGroupFrame->GetNextInFlow();
if (rgNextInFlow) {
((nsTableRowGroupFrame*)rowGroupFrame)->SetRepeatable(PR_FALSE);
}
// Replicate the header/footer frame if it is not too tall
else if (((nsTableRowGroupFrame*)rowGroupFrame)->IsRepeatable()) {
nsIFrame* headerFooterFrame;
nsFrameItems childItems;
nsFrameConstructorState state(mPresShell, mFixedContainingBlock,
GetAbsoluteContainingBlock(newFrame),
nsnull);
NS_NewTableRowGroupFrame(aPresShell, &headerFooterFrame);
nsIContent* headerFooter = rowGroupFrame->GetContent();
headerFooterFrame->Init(aPresContext, headerFooter, newFrame,
rowGroupStyle, nsnull);
nsTableCreator tableCreator(aPresShell);
ProcessChildren(state, headerFooter, headerFooterFrame,
PR_FALSE, childItems, PR_FALSE, &tableCreator);
NS_ASSERTION(!state.mFloatedItems.childList, "unexpected floated element");
headerFooterFrame->SetInitialChildList(aPresContext, nsnull, childItems.childList);
((nsTableRowGroupFrame*)headerFooterFrame)->SetRepeatable(PR_TRUE);
// Table specific initialization
((nsTableRowGroupFrame*)headerFooterFrame)->InitRepeatedFrame
(aPresContext, (nsTableRowGroupFrame*)rowGroupFrame);
// XXX Deal with absolute and fixed frames...
childFrames.AddChild(headerFooterFrame);
}
}
// Get the next row group frame
rowGroupFrame = rowGroupFrame->GetNextSibling();
}
// Set the table frame's initial child list
newFrame->SetInitialChildList(aPresContext, nsnull, childFrames.childList);
}
*aContinuingFrame = newFrame;
return rv;
}
nsresult
nsCSSFrameConstructor::CreateContinuingFrame(nsPresContext* aPresContext,
nsIFrame* aFrame,
nsIFrame* aParentFrame,
nsIFrame** aContinuingFrame)
{
nsIPresShell* shell = aPresContext->PresShell();
nsStyleContext* styleContext = aFrame->GetStyleContext();
nsIFrame* newFrame = nsnull;
nsresult rv = NS_OK;
nsIFrame* nextInFlow = aFrame->GetNextInFlow();
// Use the frame type to determine what type of frame to create
nsIAtom* frameType = aFrame->GetType();
nsIContent* content = aFrame->GetContent();
if (nsLayoutAtoms::textFrame == frameType) {
rv = NS_NewContinuingTextFrame(shell, &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext, aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
}
} else if (nsLayoutAtoms::inlineFrame == frameType) {
rv = NS_NewInlineFrame(shell, &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext, aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
}
} else if (nsLayoutAtoms::blockFrame == frameType) {
rv = NS_NewBlockFrame(shell, &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext, aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
}
} else if (nsLayoutAtoms::areaFrame == frameType) {
rv = NS_NewAreaFrame(shell, &newFrame, 0);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext,
aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
}
} else if (nsLayoutAtoms::columnSetFrame == frameType) {
rv = NS_NewColumnSetFrame(shell, &newFrame, 0);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext,
aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
}
} else if (nsLayoutAtoms::positionedInlineFrame == frameType) {
rv = NS_NewPositionedInlineFrame(shell, &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext, aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
}
} else if (nsLayoutAtoms::pageFrame == frameType) {
nsIFrame* pageContentFrame;
rv = ConstructPageFrame(shell, aPresContext, aParentFrame, aFrame,
newFrame, pageContentFrame);
} else if (nsLayoutAtoms::tableOuterFrame == frameType) {
rv = CreateContinuingOuterTableFrame(shell, aPresContext, aFrame, aParentFrame,
content, styleContext, &newFrame);
} else if (nsLayoutAtoms::tableFrame == frameType) {
rv = CreateContinuingTableFrame(shell, aPresContext, aFrame, aParentFrame,
content, styleContext, &newFrame);
} else if (nsLayoutAtoms::tableRowGroupFrame == frameType) {
rv = NS_NewTableRowGroupFrame(shell, &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext, aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
}
} else if (nsLayoutAtoms::tableRowFrame == frameType) {
rv = NS_NewTableRowFrame(shell, &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext, aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
// Create a continuing frame for each table cell frame
nsFrameItems newChildList;
nsIFrame* cellFrame = aFrame->GetFirstChild(nsnull);
while (cellFrame) {
// See if it's a table cell frame
if (IS_TABLE_CELL(cellFrame->GetType())) {
nsIFrame* continuingCellFrame;
CreateContinuingFrame(aPresContext, cellFrame, newFrame, &continuingCellFrame);
newChildList.AddChild(continuingCellFrame);
}
cellFrame = cellFrame->GetNextSibling();
}
// Set the table cell's initial child list
newFrame->SetInitialChildList(aPresContext, nsnull, newChildList.childList);
}
} else if (IS_TABLE_CELL(frameType)) {
rv = NS_NewTableCellFrame(shell, IsBorderCollapse(aParentFrame), &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext, aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
// Create a continuing area frame
nsIFrame* continuingAreaFrame;
nsIFrame* areaFrame = aFrame->GetFirstChild(nsnull);
CreateContinuingFrame(aPresContext, areaFrame, newFrame, &continuingAreaFrame);
// Set the table cell's initial child list
newFrame->SetInitialChildList(aPresContext, nsnull, continuingAreaFrame);
}
} else if (nsLayoutAtoms::lineFrame == frameType) {
rv = NS_NewFirstLineFrame(shell, &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext, aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
}
} else if (nsLayoutAtoms::letterFrame == frameType) {
rv = NS_NewFirstLetterFrame(shell, &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext, aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
}
} else if (nsLayoutAtoms::imageFrame == frameType) {
rv = NS_NewImageFrame(shell, &newFrame);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext, aFrame);
}
} else if (nsLayoutAtoms::placeholderFrame == frameType) {
// create a continuing out of flow frame
nsIFrame* oofFrame = ((nsPlaceholderFrame*)aFrame)->GetOutOfFlowFrame();
nsIFrame* oofContFrame;
CreateContinuingFrame(aPresContext, oofFrame, aParentFrame, &oofContFrame);
if (!oofContFrame)
return NS_ERROR_NULL_POINTER;
// create a continuing placeholder frame
CreatePlaceholderFrameFor(shell, aPresContext,
shell->FrameManager(), content,
oofContFrame, styleContext, aParentFrame, &newFrame);
if (!newFrame)
return NS_ERROR_NULL_POINTER;
newFrame->Init(aPresContext, content, aParentFrame, styleContext, aFrame);
} else if (nsLayoutAtoms::fieldSetFrame == frameType) {
rv = NS_NewFieldSetFrame(aPresContext->PresShell(), &newFrame,
NS_BLOCK_SPACE_MGR);
if (NS_SUCCEEDED(rv)) {
newFrame->Init(aPresContext, content, aParentFrame, styleContext,
aFrame);
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(newFrame, nsnull, PR_FALSE);
// Create a continuing area frame
// XXXbz we really shouldn't have to do this by hand!
nsIFrame* continuingAreaFrame;
nsIFrame* areaFrame = aFrame->GetFirstChild(nsnull);
CreateContinuingFrame(aPresContext, areaFrame, newFrame, &continuingAreaFrame);
// Set the fieldset's initial child list
newFrame->SetInitialChildList(aPresContext, nsnull, continuingAreaFrame);
}
} else {
NS_ASSERTION(PR_FALSE, "unexpected frame type");
rv = NS_ERROR_UNEXPECTED;
}
*aContinuingFrame = newFrame;
if (NS_FAILED(rv)) {
return rv;
}
// Now deal with fixed-pos things.... They should appear on all pages, and
// the placeholders must be kids of a block, so we want to move over the
// placeholders when processing the child of the pageContentFrame.
if (!aParentFrame) {
return NS_OK;
}
if (aParentFrame->GetType() != nsLayoutAtoms::pageContentFrame) {
if (nextInFlow) {
nextInFlow->SetPrevInFlow(newFrame);
newFrame->SetNextInFlow(nextInFlow);
}
return NS_OK;
}
// Our parent is a page content frame. Look up its page frame and
// see whether it has a prev-in-flow.
nsIFrame* pageFrame = aParentFrame->GetParent();
if (!pageFrame) {
NS_ERROR("pageContentFrame does not have parent!");
return NS_ERROR_UNEXPECTED;
}
nsIFrame* prevPage = pageFrame->GetPrevInFlow();
if (!prevPage) {
return NS_OK;
}
// OK. now we need to do this fixed-pos game.
// Get prevPage's page content frame
nsIFrame* prevPageContentFrame = prevPage->GetFirstChild(nsnull);
if (!prevPageContentFrame) {
return NS_ERROR_UNEXPECTED;
}
nsFrameItems fixedPlaceholders;
nsIFrame* firstFixed = prevPageContentFrame->GetFirstChild(nsLayoutAtoms::fixedList);
if (!firstFixed) {
return NS_OK;
}
nsFrameConstructorState state(mPresShell, aParentFrame,
mInitialContainingBlock,
mInitialContainingBlock);
// Iterate the fixed frames and replicate each
for (nsIFrame* fixed = firstFixed; fixed; fixed = fixed->GetNextSibling()) {
rv = ConstructFrame(state, fixed->GetContent(),
newFrame, fixedPlaceholders);
if (NS_FAILED(rv))
return rv;
}
// Add the placeholders to our primary child list.
// XXXbz this is a little screwed up, since the fixed frames will have the
// wrong parent block and hence auto-positioning will be broken. Oh, well.
newFrame->SetInitialChildList(aPresContext, nsnull, fixedPlaceholders.childList);
return NS_OK;
}
// Helper function that searches the immediate child frames
// (and their children if the frames are "special")
// for a frame that maps the specified content object
nsIFrame*
nsCSSFrameConstructor::FindFrameWithContent(nsFrameManager* aFrameManager,
nsIFrame* aParentFrame,
nsIContent* aParentContent,
nsIContent* aContent,
nsFindFrameHint* aHint)
{
#ifdef NOISY_FINDFRAME
FFWC_totalCount++;
printf("looking for content=%p, given aParentFrame %p parentContent %p, hint is %s\n",
aContent, aParentFrame, aParentContent, aHint ? "set" : "NULL");
#endif
NS_ENSURE_TRUE(aParentFrame != nsnull, nsnull);
do {
// Search for the frame in each child list that aParentFrame supports
nsIAtom* listName = nsnull;
PRInt32 listIndex = 0;
do {
#ifdef NOISY_FINDFRAME
FFWC_doLoop++;
#endif
nsIFrame* kidFrame=nsnull;
// if we were given an hint, try to use it here to find a good
// previous frame to start our search (|kidFrame|).
if (aHint) {
#ifdef NOISY_FINDFRAME
printf(" hint frame is %p\n", aHint->mPrimaryFrameForPrevSibling);
#endif
// start with the primary frame for aContent's previous sibling
kidFrame = aHint->mPrimaryFrameForPrevSibling;
// But if it's out of flow, start from its placeholder.
if (kidFrame && (kidFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
kidFrame = aFrameManager->GetPlaceholderFrameFor(kidFrame);
}
if (kidFrame) {
// then use the next sibling frame as our starting point
kidFrame = kidFrame->GetNextSibling();
if (!kidFrame)
{ // the hint frame had no next frame. try the next-in-flow fo the parent of the hint frame
// if there is one
nsIFrame *parentFrame = aHint->mPrimaryFrameForPrevSibling->GetParent();
if (parentFrame) {
parentFrame = GetNifOrSpecialSibling(aFrameManager, parentFrame);
}
if (parentFrame)
{ // if we found the next-in-flow for the parent of the hint frame, start with it's first child
kidFrame = parentFrame->GetFirstChild(listName);
// Leave |aParentFrame| as-is, since the only time we'll
// reuse it is if the hint fails.
NS_ASSERTION(!kidFrame || parentFrame->GetContent() == aParentContent,
"next-in-flow has different content");
}
}
#ifdef NOISY_FINDFRAME
printf(" hint gives us kidFrame=%p with parent frame %p content %p\n",
kidFrame, aParentFrame, aParentContent);
#endif
}
}
if (!kidFrame) { // we didn't have enough info to prune, start searching from the beginning
kidFrame = aParentFrame->GetFirstChild(listName);
}
while (kidFrame) {
// See if the child frame points to the content object we're
// looking for
nsIContent* kidContent = kidFrame->GetContent();
if (kidContent == aContent) {
// We found a match. See if it's a placeholder frame
if (nsLayoutAtoms::placeholderFrame == kidFrame->GetType()) {
// Ignore the placeholder and return the out-of-flow frame instead
return ((nsPlaceholderFrame*)kidFrame)->GetOutOfFlowFrame();
}
// Return the matching child frame
return kidFrame;
}
// only do this if there is content
if (kidContent) {
// We search the immediate children only, but if the child frame has
// the same content pointer as its parent then we need to search its
// child frames, too.
// We also need to search if the child content is anonymous and scoped
// to the parent content.
if (aParentContent == kidContent ||
(aParentContent && (aParentContent == kidContent->GetBindingParent())))
{
#ifdef NOISY_FINDFRAME
FFWC_recursions++;
printf(" recursing with new parent set to kidframe=%p, parentContent=%p\n",
kidFrame, aParentContent.get());
#endif
nsIFrame* matchingFrame =
FindFrameWithContent(aFrameManager, kidFrame,
aParentContent, aContent, nsnull);
if (matchingFrame) {
return matchingFrame;
}
}
}
// Get the next sibling frame
kidFrame = kidFrame->GetNextSibling();
#ifdef NOISY_FINDFRAME
FFWC_doSibling++;
if (kidFrame) {
printf(" searching sibling frame %p\n", kidFrame);
}
#endif
}
if (aHint) {
// If we get here, and we had a hint, then we didn't find a
// frame. The hint may have been a floated or absolutely
// positioned frame, in which case we'd be off in the weeds
// looking through something other than primary frame
// list. Reboot the search from scratch, without the hint, but
// using the null child list again.
aHint = nsnull;
} else {
listName = aParentFrame->GetAdditionalChildListName(listIndex++);
}
} while(listName);
// We didn't find a matching frame. If aFrame has a next-in-flow,
// then continue looking there
aParentFrame = GetNifOrSpecialSibling(aFrameManager, aParentFrame);
#ifdef NOISY_FINDFRAME
if (aParentFrame) {
FFWC_nextInFlows++;
printf(" searching NIF frame %p\n", aParentFrame);
}
#endif
} while (aParentFrame);
// No matching frame
return nsnull;
}
// Request to find the primary frame associated with a given content object.
// This is typically called by the pres shell when there is no mapping in
// the pres shell hash table
nsresult
nsCSSFrameConstructor::FindPrimaryFrameFor(nsFrameManager* aFrameManager,
nsIContent* aContent,
nsIFrame** aFrame,
nsFindFrameHint* aHint)
{
NS_ASSERTION(aFrameManager && aContent && aFrame, "bad arg");
*aFrame = nsnull; // initialize OUT parameter
// We want to be able to quickly map from a content object to its frame,
// but we also want to keep the hash table small. Therefore, many frames
// are not added to the hash table when they're first created:
// - text frames
// - inline frames (often things like FONT and B)
// - BR frames
// - internal table frames (row-group, row, cell, col-group, col)
//
// That means we need to need to search for the frame
nsIFrame* parentFrame; // this pointer is used to iterate across all frames that map to parentContent
// Get the frame that corresponds to the parent content object.
// Note that this may recurse indirectly, because the pres shell will
// call us back if there is no mapping in the hash table
nsCOMPtr<nsIContent> parentContent = aContent->GetParent(); // Get this once
if (parentContent) {
parentFrame = aFrameManager->GetPrimaryFrameFor(parentContent);
while (parentFrame) {
// Search the child frames for a match
*aFrame = FindFrameWithContent(aFrameManager, parentFrame,
parentContent, aContent, aHint);
#ifdef NOISY_FINDFRAME
printf("FindFrameWithContent returned %p\n", *aFrame);
#endif
#ifdef DEBUG
// if we're given a hint and we were told to verify, then compare the resulting frame with
// the frame we get by calling FindFrameWithContent *without* the hint.
// Assert if they do not match
// Note that this makes finding frames *slower* than it was before the fix.
if (gVerifyFastFindFrame && aHint)
{
#ifdef NOISY_FINDFRAME
printf("VERIFYING...\n");
#endif
nsIFrame *verifyTestFrame =
FindFrameWithContent(aFrameManager, parentFrame,
parentContent, aContent, nsnull);
#ifdef NOISY_FINDFRAME
printf("VERIFY returned %p\n", verifyTestFrame);
#endif
NS_ASSERTION(verifyTestFrame == *aFrame, "hint shortcut found wrong frame");
}
#endif
// If we found a match, then add a mapping to the hash table so
// next time this will be quick
if (*aFrame) {
aFrameManager->SetPrimaryFrameFor(aContent, *aFrame);
break;
}
else if (IsFrameSpecial(parentFrame)) {
// If it's a "special" frame (that is, part of an inline
// that's been split because it contained a block), we need to
// follow the out-of-flow "special sibling" link, and search
// *that* subtree as well.
nsIFrame* specialSibling = nsnull;
GetSpecialSibling(aFrameManager, parentFrame, &specialSibling);
parentFrame = specialSibling;
}
else {
break;
}
}
}
if (aHint && !*aFrame)
{ // if we had a hint, and we didn't get a frame, see if we should try the slow way
if (aContent->Tag() == nsLayoutAtoms::textTagName)
{
#ifdef NOISY_FINDFRAME
FFWC_slowSearchForText++;
#endif
// since we're passing in a null hint, we're guaranteed to only recurse once
return FindPrimaryFrameFor(aFrameManager, aContent, aFrame, nsnull);
}
}
#ifdef NOISY_FINDFRAME
printf("%10s %10s %10s %10s %10s \n",
"total", "doLoop", "doSibling", "recur", "nextIF", "slowSearch");
printf("%10d %10d %10d %10d %10d \n",
FFWC_totalCount, FFWC_doLoop, FFWC_doSibling, FFWC_recursions,
FFWC_nextInFlows, FFWC_slowSearchForText);
#endif
return NS_OK;
}
nsresult
nsCSSFrameConstructor::GetInsertionPoint(nsIFrame* aParentFrame,
nsIContent* aChildContent,
nsIFrame** aInsertionPoint,
PRBool* aMultiple)
{
// Make the insertion point be the parent frame by default, in case
// we have to bail early.
*aInsertionPoint = aParentFrame;
nsIContent* container = aParentFrame->GetContent();
if (!container)
return NS_OK;
nsIBindingManager *bindingManager = mDocument->BindingManager();
nsCOMPtr<nsIContent> insertionElement;
if (aChildContent) {
// We've got an explicit insertion child. Check to see if it's
// anonymous.
if (aChildContent->GetBindingParent() == container) {
// This child content is anonymous. Don't use the insertion
// point, since that's only for the explicit kids.
return NS_OK;
}
PRUint32 index;
insertionElement = bindingManager->GetInsertionPoint(container,
aChildContent,
&index);
}
else {
PRBool multiple;
PRUint32 index;
insertionElement = bindingManager->GetSingleInsertionPoint(container,
&index,
&multiple);
if (multiple && aMultiple)
*aMultiple = multiple; // Record the fact that filters are in use.
}
if (insertionElement) {
nsIFrame* insertionPoint = nsnull;
mPresShell->GetPrimaryFrameFor(insertionElement, &insertionPoint);
if (insertionPoint) {
// If the insertion point is a scrollable, then walk ``through''
// it to get the scrolled frame.
nsIScrollableFrame* scroll = nsnull;
CallQueryInterface(insertionPoint, &scroll);
if (scroll)
insertionPoint = scroll->GetScrolledFrame();
if (insertionPoint != aParentFrame)
GetInsertionPoint(insertionPoint, aChildContent, aInsertionPoint, aMultiple);
}
else {
// There was no frame created yet for the insertion point.
*aInsertionPoint = nsnull;
}
}
return NS_OK;
}
// Capture state for the frame tree rooted at the frame associated with the
// content object, aContent
nsresult
nsCSSFrameConstructor::CaptureStateForFramesOf(nsIContent* aContent,
nsILayoutHistoryState* aHistoryState)
{
nsresult rv = NS_OK;
nsIFrame* frame;
rv = mPresShell->GetPrimaryFrameFor(aContent, &frame);
if (NS_SUCCEEDED(rv) && frame) {
CaptureStateFor(frame, aHistoryState);
}
return rv;
}
// Capture state for the frame tree rooted at aFrame.
nsresult
nsCSSFrameConstructor::CaptureStateFor(nsIFrame* aFrame,
nsILayoutHistoryState* aHistoryState)
{
if (aFrame && aHistoryState) {
mPresShell->FrameManager()->CaptureFrameState(aFrame, aHistoryState);
}
return NS_OK;
}
nsresult
nsCSSFrameConstructor::MaybeRecreateFramesForContent(nsIContent* aContent)
{
nsresult result = NS_OK;
nsFrameManager *frameManager = mPresShell->FrameManager();
nsStyleContext *oldContext = frameManager->GetUndisplayedContent(aContent);
if (oldContext) {
// The parent has a frame, so try resolving a new context.
nsRefPtr<nsStyleContext> newContext = mPresShell->StyleSet()->
ResolveStyleFor(aContent, oldContext->GetParent());
frameManager->ChangeUndisplayedContent(aContent, newContext);
if (newContext->GetStyleDisplay()->mDisplay != NS_STYLE_DISPLAY_NONE) {
result = RecreateFramesForContent(aContent);
}
}
return result;
}
nsresult
nsCSSFrameConstructor::RecreateFramesForContent(nsIContent* aContent)
{
// If there is no document, we don't want to recreate frames for it. (You
// shouldn't generally be giving this method content without a document
// anyway).
// Rebuilding the frame tree can have bad effects, especially if it's the
// frame tree for chrome (see bug 157322).
NS_ENSURE_TRUE(aContent->GetDocument(), NS_ERROR_FAILURE);
// Is the frame `special'? If so, we need to reframe the containing
// block *here*, rather than trying to remove and re-insert the
// content (which would otherwise result in *two* nested reframe
// containing block from ContentRemoved() and ContentInserted(),
// below!)
nsIFrame* frame;
mPresShell->GetPrimaryFrameFor(aContent, &frame);
nsPresContext* presContext = mPresShell->GetPresContext();
if (frame) {
// If the background of the frame is painted on one of its ancestors,
// the frame reconstruct might not invalidate correctly.
nsIFrame *ancestor = frame;
const nsStyleBackground *bg;
PRBool isCanvas;
while (!nsCSSRendering::FindBackground(presContext, ancestor,
&bg, &isCanvas)) {
ancestor = ancestor->GetParent();
NS_ASSERTION(ancestor, "canvas must paint");
}
// This isn't the most efficient way to do it, but it saves code
// size and doesn't add much cost compared to the frame reconstruct.
if (ancestor != frame)
ApplyRenderingChangeToTree(presContext, ancestor, nsnull,
nsChangeHint_RepaintFrame);
}
if (frame && IsFrameSpecial(frame)) {
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::RecreateFramesForContent: frame=");
nsFrame::ListTag(stdout, frame);
printf(" is special\n");
}
#endif
return ReframeContainingBlock(frame);
}
nsresult rv = NS_OK;
nsCOMPtr<nsIContent> container = aContent->GetParent();
if (container) {
PRInt32 indexInContainer = container->IndexOf(aContent);
// Before removing the frames associated with the content object,
// ask them to save their state onto a temporary state object.
CaptureStateForFramesOf(aContent, mTempFrameTreeState);
// Save parent frame because this frame is going away. But if
// this is an out-of-flow, we want to get the _placeholder_'s
// parent.
nsIFrame* parent = nsnull;
if (frame) {
if (frame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
mPresShell->GetPlaceholderFrameFor(frame, &frame);
NS_ASSERTION(frame, "Out-of-flow with no placeholder?");
}
frame = frame->GetParent();
}
// Remove the frames associated with the content object on which
// the attribute change occurred.
rv = ContentRemoved(container, aContent, indexInContainer,
PR_FALSE);
if (NS_SUCCEEDED(rv)) {
// Now, recreate the frames associated with this content object.
rv = ContentInserted(container, parent, aContent,
indexInContainer, mTempFrameTreeState, PR_FALSE);
}
} else {
// The content is the root node, so just rebuild the world.
ReconstructDocElementHierarchy();
}
return rv;
}
//////////////////////////////////////////////////////////////////////
// Block frame construction code
already_AddRefed<nsStyleContext>
nsCSSFrameConstructor::GetFirstLetterStyle(nsIContent* aContent,
nsStyleContext* aStyleContext)
{
if (aContent) {
return mPresShell->StyleSet()->
ResolvePseudoStyleFor(aContent,
nsCSSPseudoElements::firstLetter, aStyleContext);
}
return nsnull;
}
already_AddRefed<nsStyleContext>
nsCSSFrameConstructor::GetFirstLineStyle(nsIContent* aContent,
nsStyleContext* aStyleContext)
{
if (aContent) {
return mPresShell->StyleSet()->
ResolvePseudoStyleFor(aContent,
nsCSSPseudoElements::firstLine, aStyleContext);
}
return nsnull;
}
// Predicate to see if a given content (block element) has
// first-letter style applied to it.
PRBool
nsCSSFrameConstructor::HaveFirstLetterStyle(nsIContent* aContent,
nsStyleContext* aStyleContext)
{
return nsLayoutUtils::HasPseudoStyle(aContent, aStyleContext,
nsCSSPseudoElements::firstLetter,
mPresShell->GetPresContext());
}
PRBool
nsCSSFrameConstructor::HaveFirstLineStyle(nsIContent* aContent,
nsStyleContext* aStyleContext)
{
return nsLayoutUtils::HasPseudoStyle(aContent, aStyleContext,
nsCSSPseudoElements::firstLine,
mPresShell->GetPresContext());
}
void
nsCSSFrameConstructor::HaveSpecialBlockStyle(nsIContent* aContent,
nsStyleContext* aStyleContext,
PRBool* aHaveFirstLetterStyle,
PRBool* aHaveFirstLineStyle)
{
*aHaveFirstLetterStyle =
HaveFirstLetterStyle(aContent, aStyleContext);
*aHaveFirstLineStyle =
HaveFirstLineStyle(aContent, aStyleContext);
}
/**
* Request to process the child content elements and create frames.
*
* @param aContent the content object whose child elements to process
* @param aFrame the the associated with aContent. This will be the
* parent frame (both content and geometric) for the flowed
* child frames
*/
nsresult
nsCSSFrameConstructor::ProcessChildren(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aFrame,
PRBool aCanHaveGeneratedContent,
nsFrameItems& aFrameItems,
PRBool aParentIsBlock,
nsTableCreator* aTableCreator)
{
nsresult rv = NS_OK;
nsStyleContext* styleContext = aFrame->GetStyleContext();
if (aCanHaveGeneratedContent) {
// Probe for generated content before
nsIFrame* generatedFrame;
if (CreateGeneratedContentFrame(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::before,
&generatedFrame)) {
// Add the generated frame to the child list
aFrameItems.AddChild(generatedFrame);
}
}
if (aTableCreator) { // do special table child processing
// if there is a caption child here, it gets recorded in aState.mPseudoFrames.
nsIFrame* captionFrame;
TableProcessChildren(aState, aContent, aFrame, *aTableCreator,
aFrameItems, captionFrame);
}
else {
// save the incoming pseudo frame state
nsPseudoFrames priorPseudoFrames;
aState.mPseudoFrames.Reset(&priorPseudoFrames);
ChildIterator iter, last;
for (ChildIterator::Init(aContent, &iter, &last);
iter != last;
++iter) {
rv = ConstructFrame(aState, nsCOMPtr<nsIContent>(*iter),
aFrame, aFrameItems);
if (NS_FAILED(rv))
return rv;
}
// process the current pseudo frame state
if (!aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
// restore the incoming pseudo frame state
aState.mPseudoFrames = priorPseudoFrames;
}
if (aCanHaveGeneratedContent) {
// Probe for generated content after
nsIFrame* generatedFrame;
if (CreateGeneratedContentFrame(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::after,
&generatedFrame)) {
// Add the generated frame to the child list
aFrameItems.AddChild(generatedFrame);
}
}
if (aParentIsBlock) {
if (aState.mFirstLetterStyle) {
rv = WrapFramesInFirstLetterFrame(aState, aContent, aFrame, aFrameItems);
}
if (aState.mFirstLineStyle) {
rv = WrapFramesInFirstLineFrame(aState, aContent, aFrame, aFrameItems);
}
}
return rv;
}
//----------------------------------------------------------------------
// Support for :first-line style
static void
ReparentFrame(nsPresContext* aPresContext,
nsIFrame* aNewParentFrame,
nsStyleContext* aParentStyleContext,
nsIFrame* aFrame)
{
aFrame->SetParent(aNewParentFrame);
aPresContext->FrameManager()->ReParentStyleContext(aFrame,
aParentStyleContext);
}
// Special routine to handle placing a list of frames into a block
// frame that has first-line style. The routine ensures that the first
// collection of inline frames end up in a first-line frame.
nsresult
nsCSSFrameConstructor::WrapFramesInFirstLineFrame(
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aFrame,
nsFrameItems& aFrameItems)
{
nsresult rv = NS_OK;
// Find the first and last inline frame in aFrameItems
nsIFrame* kid = aFrameItems.childList;
nsIFrame* firstInlineFrame = nsnull;
nsIFrame* lastInlineFrame = nsnull;
while (kid) {
if (IsInlineFrame(kid)) {
if (!firstInlineFrame) firstInlineFrame = kid;
lastInlineFrame = kid;
}
else {
break;
}
kid = kid->GetNextSibling();
}
// If we don't find any inline frames, then there is nothing to do
if (!firstInlineFrame) {
return rv;
}
// Create line frame
nsStyleContext* parentStyle = aFrame->GetStyleContext();
nsRefPtr<nsStyleContext> firstLineStyle = GetFirstLineStyle(aContent,
parentStyle);
nsIFrame* lineFrame;
rv = NS_NewFirstLineFrame(mPresShell, &lineFrame);
if (NS_SUCCEEDED(rv)) {
// Initialize the line frame
rv = InitAndRestoreFrame(aState, aContent, aFrame, firstLineStyle, nsnull,
lineFrame);
// Mangle the list of frames we are giving to the block: first
// chop the list in two after lastInlineFrame
nsIFrame* secondBlockFrame = lastInlineFrame->GetNextSibling();
lastInlineFrame->SetNextSibling(nsnull);
// The lineFrame will be the block's first child; the rest of the
// frame list (after lastInlineFrame) will be the second and
// subsequent children; join the list together and reset
// aFrameItems appropriately.
if (secondBlockFrame) {
lineFrame->SetNextSibling(secondBlockFrame);
}
if (aFrameItems.childList == lastInlineFrame) {
// Just in case the block had exactly one inline child
aFrameItems.lastChild = lineFrame;
}
aFrameItems.childList = lineFrame;
// Give the inline frames to the lineFrame <b>after</b> reparenting them
kid = firstInlineFrame;
while (kid) {
ReparentFrame(aState.mPresContext, lineFrame, firstLineStyle, kid);
kid = kid->GetNextSibling();
}
lineFrame->SetInitialChildList(aState.mPresContext, nsnull,
firstInlineFrame);
}
return rv;
}
// Special routine to handle appending a new frame to a block frame's
// child list. Takes care of placing the new frame into the right
// place when first-line style is present.
nsresult
nsCSSFrameConstructor::AppendFirstLineFrames(
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aBlockFrame,
nsFrameItems& aFrameItems)
{
// It's possible that aBlockFrame needs to have a first-line frame
// created because it doesn't currently have any children.
nsIFrame* blockKid = aBlockFrame->GetFirstChild(nsnull);
if (!blockKid) {
return WrapFramesInFirstLineFrame(aState, aContent,
aBlockFrame, aFrameItems);
}
// Examine the last block child - if it's a first-line frame then
// appended frames need special treatment.
nsresult rv = NS_OK;
nsFrameList blockFrames(blockKid);
nsIFrame* lastBlockKid = blockFrames.LastChild();
if (lastBlockKid->GetType() != nsLayoutAtoms::lineFrame) {
// No first-line frame at the end of the list, therefore there is
// an interveening block between any first-line frame the frames
// we are appending. Therefore, we don't need any special
// treatment of the appended frames.
return rv;
}
nsIFrame* lineFrame = lastBlockKid;
nsStyleContext* firstLineStyle = lineFrame->GetStyleContext();
// Find the first and last inline frame in aFrameItems
nsIFrame* kid = aFrameItems.childList;
nsIFrame* firstInlineFrame = nsnull;
nsIFrame* lastInlineFrame = nsnull;
while (kid) {
if (IsInlineFrame(kid)) {
if (!firstInlineFrame) firstInlineFrame = kid;
lastInlineFrame = kid;
}
else {
break;
}
kid = kid->GetNextSibling();
}
// If we don't find any inline frames, then there is nothing to do
if (!firstInlineFrame) {
return rv;
}
// The inline frames get appended to the lineFrame. Make sure they
// are reparented properly.
nsIFrame* remainingFrames = lastInlineFrame->GetNextSibling();
lastInlineFrame->SetNextSibling(nsnull);
kid = firstInlineFrame;
while (kid) {
ReparentFrame(aState.mPresContext, lineFrame, firstLineStyle, kid);
kid = kid->GetNextSibling();
}
aState.mFrameManager->AppendFrames(lineFrame, nsnull, firstInlineFrame);
// The remaining frames get appended to the block frame
if (remainingFrames) {
aFrameItems.childList = remainingFrames;
}
else {
aFrameItems.childList = nsnull;
aFrameItems.lastChild = nsnull;
}
return rv;
}
// Special routine to handle inserting a new frame into a block
// frame's child list. Takes care of placing the new frame into the
// right place when first-line style is present.
nsresult
nsCSSFrameConstructor::InsertFirstLineFrames(
nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aBlockFrame,
nsIFrame** aParentFrame,
nsIFrame* aPrevSibling,
nsFrameItems& aFrameItems)
{
nsresult rv = NS_OK;
#if 0
nsIFrame* parentFrame = *aParentFrame;
nsIFrame* newFrame = aFrameItems.childList;
PRBool isInline = IsInlineFrame(newFrame);
if (!aPrevSibling) {
// Insertion will become the first frame. Two cases: we either
// already have a first-line frame or we don't.
nsIFrame* firstBlockKid = aBlockFrame->GetFirstChild(nsnull);
if (firstBlockKid->GetType() == nsLayoutAtoms::lineFrame) {
// We already have a first-line frame
nsIFrame* lineFrame = firstBlockKid;
nsStyleContext* firstLineStyle = lineFrame->GetStyleContext();
if (isInline) {
// Easy case: the new inline frame will go into the lineFrame.
ReparentFrame(aState.mPresContext, lineFrame, firstLineStyle,
newFrame);
aState.mFrameManager->InsertFrames(lineFrame, nsnull, nsnull,
newFrame);
// Since the frame is going into the lineFrame, don't let it
// go into the block too.
aFrameItems.childList = nsnull;
aFrameItems.lastChild = nsnull;
}
else {
// Harder case: We are about to insert a block level element
// before the first-line frame.
// XXX need a method to steal away frames from the line-frame
}
}
else {
// We do not have a first-line frame
if (isInline) {
// We now need a first-line frame to contain the inline frame.
nsIFrame* lineFrame;
rv = NS_NewFirstLineFrame(&lineFrame);
if (NS_SUCCEEDED(rv)) {
// Lookup first-line style context
nsStyleContext* parentStyle = aBlockFrame->GetStyleContext();
nsRefPtr<nsStyleContext> firstLineStyle =
GetFirstLineStyle(aContent, parentStyle);
// Initialize the line frame
rv = InitAndRestoreFrame(aState, aContent, aBlockFrame,
firstLineStyle, nsnull, lineFrame);
// Make sure the caller inserts the lineFrame into the
// blocks list of children.
aFrameItems.childList = lineFrame;
aFrameItems.lastChild = lineFrame;
// Give the inline frames to the lineFrame <b>after</b>
// reparenting them
ReparentFrame(aPresContext, lineFrame, firstLineStyle, newFrame);
lineFrame->SetInitialChildList(aState.mPresContext, nsnull,
newFrame);
}
}
else {
// Easy case: the regular insertion logic can insert the new
// frame because its a block frame.
}
}
}
else {
// Insertion will not be the first frame.
nsIFrame* prevSiblingParent = aPrevSibling->GetParent();
if (prevSiblingParent == aBlockFrame) {
// Easy case: The prev-siblings parent is the block
// frame. Therefore the prev-sibling is not currently in a
// line-frame. Therefore the new frame which is going after it,
// regardless of type, is not going into a line-frame.
}
else {
// If the prevSiblingParent is not the block-frame then it must
// be a line-frame (if it were a letter-frame, that logic would
// already have adjusted the prev-sibling to be the
// letter-frame).
if (isInline) {
// Easy case: the insertion can go where the caller thinks it
// should go (which is into prevSiblingParent).
}
else {
// Block elements don't end up in line-frames, therefore
// change the insertion point to aBlockFrame. However, there
// might be more inline elements following aPrevSibling that
// need to be pulled out of the line-frame and become children
// of the block.
nsIFrame* nextSibling = aPrevSibling->GetNextSibling();
nsIFrame* nextLineFrame = prevSiblingParent->GetNextInFlow();
if (nextSibling || nextLineFrame) {
// Oy. We have work to do. Create a list of the new frames
// that are going into the block by stripping them away from
// the line-frame(s).
nsFrameList list(nextSibling);
if (nextSibling) {
nsLineFrame* lineFrame = (nsLineFrame*) prevSiblingParent;
lineFrame->StealFramesFrom(nextSibling);
}
nsLineFrame* nextLineFrame = (nsLineFrame*) lineFrame;
for (;;) {
nextLineFrame = nextLineFrame->GetNextInFlow();
if (!nextLineFrame) {
break;
}
nsIFrame* kids = nextLineFrame->GetFirstChild(nsnull);
}
}
else {
// We got lucky: aPrevSibling was the last inline frame in
// the line-frame.
ReparentFrame(aState.mPresContext, aBlockFrame, firstLineStyle,
newFrame);
aState.mFrameManager->InsertFrames(aBlockFrame, nsnull,
prevSiblingParent, newFrame);
aFrameItems.childList = nsnull;
aFrameItems.lastChild = nsnull;
}
}
}
}
#endif
return rv;
}
//----------------------------------------------------------------------
// First-letter support
// Determine how many characters in the text fragment apply to the
// first letter
static PRInt32
FirstLetterCount(const nsTextFragment* aFragment)
{
PRInt32 count = 0;
PRInt32 firstLetterLength = 0;
PRBool done = PR_FALSE;
PRInt32 i, n = aFragment->GetLength();
for (i = 0; i < n; i++) {
PRUnichar ch = aFragment->CharAt(i);
if (XP_IS_SPACE(ch)) {
if (firstLetterLength) {
done = PR_TRUE;
break;
}
count++;
continue;
}
// XXX I18n
if ((ch == '\'') || (ch == '\"')) {
if (firstLetterLength) {
done = PR_TRUE;
break;
}
// keep looping
firstLetterLength = 1;
}
else {
count++;
done = PR_TRUE;
break;
}
}
return count;
}
static PRBool
NeedFirstLetterContinuation(nsIContent* aContent)
{
NS_PRECONDITION(aContent, "null ptr");
PRBool result = PR_FALSE;
if (aContent) {
nsCOMPtr<nsITextContent> tc(do_QueryInterface(aContent));
if (tc) {
const nsTextFragment* frag = tc->Text();
PRInt32 flc = FirstLetterCount(frag);
PRInt32 tl = frag->GetLength();
if (flc < tl) {
result = PR_TRUE;
}
}
}
return result;
}
static PRBool IsFirstLetterContent(nsIContent* aContent)
{
PRBool result = PR_FALSE;
nsCOMPtr<nsITextContent> textContent = do_QueryInterface(aContent);
if (textContent && textContent->TextLength()) {
result = !textContent->IsOnlyWhitespace();
}
return result;
}
/**
* Create a letter frame, only make it a floating frame.
*/
void
nsCSSFrameConstructor::CreateFloatingLetterFrame(
nsFrameConstructorState& aState,
nsIContent* aTextContent,
nsIFrame* aTextFrame,
nsIContent* aBlockContent,
nsIFrame* aParentFrame,
nsStyleContext* aStyleContext,
nsFrameItems& aResult)
{
// Create the first-letter-frame
nsIFrame* letterFrame;
nsStyleSet *styleSet = mPresShell->StyleSet();
NS_NewFirstLetterFrame(mPresShell, &letterFrame);
InitAndRestoreFrame(aState, aTextContent, aParentFrame, aStyleContext,
nsnull, letterFrame);
// Init the text frame to refer to the letter frame. Make sure we
// get a proper style context for it (the one passed in is for the
// letter frame and will have the float property set on it; the text
// frame shouldn't have that set).
nsRefPtr<nsStyleContext> textSC;
textSC = styleSet->ResolveStyleForNonElement(aStyleContext);
InitAndRestoreFrame(aState, aTextContent, letterFrame, textSC, nsnull,
aTextFrame);
// And then give the text frame to the letter frame
letterFrame->SetInitialChildList(aState.mPresContext, nsnull, aTextFrame);
// Now make the placeholder
nsIFrame* placeholderFrame;
CreatePlaceholderFrameFor(mPresShell,
aState.mPresContext, aState.mFrameManager,
aTextContent, letterFrame,
aStyleContext, aParentFrame,
&placeholderFrame);
// See if we will need to continue the text frame (does it contain
// more than just the first-letter text or not?) If it does, then we
// create (in advance) a continuation frame for it.
nsIFrame* nextTextFrame = nsnull;
if (NeedFirstLetterContinuation(aTextContent)) {
// Create continuation
CreateContinuingFrame(aState.mPresContext, aTextFrame, aParentFrame,
&nextTextFrame);
// Repair the continuations style context
nsStyleContext* parentStyleContext = aStyleContext->GetParent();
if (parentStyleContext) {
nsRefPtr<nsStyleContext> newSC;
newSC = styleSet->ResolveStyleForNonElement(parentStyleContext);
if (newSC) {
nextTextFrame->SetStyleContext(aState.mPresContext, newSC);
}
}
}
// Update the child lists for the frame containing the floating first
// letter frame.
aState.mFloatedItems.AddChild(letterFrame);
aResult.childList = aResult.lastChild = placeholderFrame;
if (nextTextFrame) {
aResult.AddChild(nextTextFrame);
}
}
/**
* Create a new letter frame for aTextFrame. The letter frame will be
* a child of aParentFrame.
*/
nsresult
nsCSSFrameConstructor::CreateLetterFrame(nsFrameConstructorState& aState,
nsIContent* aTextContent,
nsIFrame* aParentFrame,
nsFrameItems& aResult)
{
NS_PRECONDITION(aTextContent->IsContentOfType(nsIContent::eTEXT),
"aTextContent isn't text");
// Get style context for the first-letter-frame
nsStyleContext* parentStyleContext = aParentFrame->GetStyleContext();
if (parentStyleContext) {
// Use content from containing block so that we can actually
// find a matching style rule.
nsIContent* blockContent = aState.mFloatedItems.containingBlock->GetContent();
// Create first-letter style rule
nsRefPtr<nsStyleContext> sc = GetFirstLetterStyle(blockContent,
parentStyleContext);
if (sc) {
// Create a new text frame (the original one will be discarded)
nsIFrame* textFrame;
NS_NewTextFrame(mPresShell, &textFrame);
// Create the right type of first-letter frame
const nsStyleDisplay* display = sc->GetStyleDisplay();
if (display->IsFloating()) {
// Make a floating first-letter frame
CreateFloatingLetterFrame(aState, aTextContent, textFrame,
blockContent, aParentFrame,
sc, aResult);
}
else {
// Make an inflow first-letter frame
nsIFrame* letterFrame;
nsresult rv = NS_NewFirstLetterFrame(mPresShell, &letterFrame);
if (NS_SUCCEEDED(rv)) {
// Initialize the first-letter-frame.
letterFrame->Init(aState.mPresContext, aTextContent, aParentFrame,
sc, nsnull);
nsRefPtr<nsStyleContext> textSC;
textSC = mPresShell->StyleSet()->ResolveStyleForNonElement(sc);
InitAndRestoreFrame(aState, aTextContent, letterFrame, textSC,
nsnull, textFrame);
letterFrame->SetInitialChildList(aState.mPresContext, nsnull,
textFrame);
aResult.childList = aResult.lastChild = letterFrame;
}
}
}
}
return NS_OK;
}
nsresult
nsCSSFrameConstructor::WrapFramesInFirstLetterFrame(
nsFrameConstructorState& aState,
nsIContent* aBlockContent,
nsIFrame* aBlockFrame,
nsFrameItems& aBlockFrames)
{
nsresult rv = NS_OK;
nsIFrame* parentFrame = nsnull;
nsIFrame* textFrame = nsnull;
nsIFrame* prevFrame = nsnull;
nsFrameItems letterFrames;
PRBool stopLooking = PR_FALSE;
rv = WrapFramesInFirstLetterFrame(aState, aBlockFrame,
aBlockFrames.childList,
&parentFrame, &textFrame, &prevFrame,
letterFrames, &stopLooking);
if (NS_FAILED(rv)) {
return rv;
}
if (parentFrame) {
if (parentFrame == aBlockFrame) {
// Text textFrame out of the blocks frame list and substitute the
// letter frame(s) instead.
nsIFrame* nextSibling = textFrame->GetNextSibling();
textFrame->SetNextSibling(nsnull);
if (prevFrame) {
prevFrame->SetNextSibling(letterFrames.childList);
}
else {
aBlockFrames.childList = letterFrames.childList;
}
letterFrames.lastChild->SetNextSibling(nextSibling);
// Destroy the old textFrame
textFrame->Destroy(aState.mPresContext);
// Repair lastChild; the only time this needs to happen is when
// the block had one child (the text frame).
if (!nextSibling) {
aBlockFrames.lastChild = letterFrames.lastChild;
}
}
else {
// Take the old textFrame out of the inline parents child list
DeletingFrameSubtree(aState.mPresContext, mPresShell,
aState.mFrameManager, textFrame);
parentFrame->RemoveFrame(nsnull, textFrame);
// Insert in the letter frame(s)
parentFrame->InsertFrames(nsnull, prevFrame, letterFrames.childList);
}
}
return rv;
}
nsresult
nsCSSFrameConstructor::WrapFramesInFirstLetterFrame(
nsFrameConstructorState& aState,
nsIFrame* aParentFrame,
nsIFrame* aParentFrameList,
nsIFrame** aModifiedParent,
nsIFrame** aTextFrame,
nsIFrame** aPrevFrame,
nsFrameItems& aLetterFrames,
PRBool* aStopLooking)
{
nsresult rv = NS_OK;
nsIFrame* prevFrame = nsnull;
nsIFrame* frame = aParentFrameList;
while (frame) {
nsIFrame* nextFrame = frame->GetNextSibling();
nsIAtom* frameType = frame->GetType();
if (nsLayoutAtoms::textFrame == frameType) {
// Wrap up first-letter content in a letter frame
nsIContent* textContent = frame->GetContent();
if (IsFirstLetterContent(textContent)) {
// Create letter frame to wrap up the text
rv = CreateLetterFrame(aState, textContent,
aParentFrame, aLetterFrames);
if (NS_FAILED(rv)) {
return rv;
}
// Provide adjustment information for parent
*aModifiedParent = aParentFrame;
*aTextFrame = frame;
*aPrevFrame = prevFrame;
*aStopLooking = PR_TRUE;
return NS_OK;
}
}
else if ((nsLayoutAtoms::inlineFrame == frameType) ||
(nsLayoutAtoms::lineFrame == frameType) ||
(nsLayoutAtoms::positionedInlineFrame == frameType)) {
nsIFrame* kids = frame->GetFirstChild(nsnull);
WrapFramesInFirstLetterFrame(aState, frame, kids,
aModifiedParent, aTextFrame,
aPrevFrame, aLetterFrames, aStopLooking);
if (*aStopLooking) {
return NS_OK;
}
}
else {
// This will stop us looking to create more letter frames. For
// example, maybe the frame-type is "letterFrame" or
// "placeholderFrame". This keeps us from creating extra letter
// frames, and also prevents us from creating letter frames when
// the first real content child of a block is not text (e.g. an
// image, hr, etc.)
*aStopLooking = PR_TRUE;
break;
}
prevFrame = frame;
frame = nextFrame;
}
return rv;
}
nsresult
nsCSSFrameConstructor::RemoveFloatingFirstLetterFrames(
nsPresContext* aPresContext,
nsIPresShell* aPresShell,
nsFrameManager* aFrameManager,
nsIFrame* aBlockFrame,
PRBool* aStopLooking)
{
// First look for the float frame that is a letter frame
nsIFrame* floatFrame = aBlockFrame->GetFirstChild(nsLayoutAtoms::floatList);
while (floatFrame) {
// See if we found a floating letter frame
if (nsLayoutAtoms::letterFrame == floatFrame->GetType()) {
break;
}
floatFrame = floatFrame->GetNextSibling();
}
if (!floatFrame) {
// No such frame
return NS_OK;
}
// Take the text frame away from the letter frame (so it isn't
// destroyed when we destroy the letter frame).
nsIFrame* textFrame = floatFrame->GetFirstChild(nsnull);
if (!textFrame) {
return NS_OK;
}
// Discover the placeholder frame for the letter frame
nsIFrame* parentFrame;
nsPlaceholderFrame* placeholderFrame =
aFrameManager->GetPlaceholderFrameFor(floatFrame);
if (!placeholderFrame) {
// Somethings really wrong
return NS_OK;
}
parentFrame = placeholderFrame->GetParent();
if (!parentFrame) {
// Somethings really wrong
return NS_OK;
}
// Create a new text frame with the right style context that maps
// all of the content that was previously part of the letter frame
// (and probably continued elsewhere).
nsStyleContext* parentSC = parentFrame->GetStyleContext();
if (!parentSC) {
return NS_OK;
}
nsIContent* textContent = textFrame->GetContent();
if (!textContent) {
return NS_OK;
}
nsRefPtr<nsStyleContext> newSC;
newSC = aPresShell->StyleSet()->ResolveStyleForNonElement(parentSC);
if (!newSC) {
return NS_OK;
}
nsIFrame* newTextFrame;
nsresult rv = NS_NewTextFrame(aPresShell, &newTextFrame);
if (NS_FAILED(rv)) {
return rv;
}
newTextFrame->Init(aPresContext, textContent, parentFrame, newSC, nsnull);
// Destroy the old text frame's continuations (the old text frame
// will be destroyed when its letter frame is destroyed).
nsIFrame* nextTextFrame = textFrame->GetNextInFlow();
if (nextTextFrame) {
nsIFrame* nextTextParent = nextTextFrame->GetParent();
if (nextTextParent) {
nsSplittableFrame::BreakFromPrevFlow(nextTextFrame);
DeletingFrameSubtree(aPresContext, aPresShell,
aFrameManager, nextTextFrame);
aFrameManager->RemoveFrame(nextTextParent, nsnull, nextTextFrame);
}
}
// First find out where (in the content) the placeholder frames
// text is and its previous sibling frame, if any.
nsIFrame* prevSibling = nsnull;
nsIContent* container = parentFrame->GetContent();
if (container && textContent) {
PRInt32 ix = container->IndexOf(textContent);
prevSibling = FindPreviousSibling(container, aBlockFrame, ix);
}
// Now that everything is set...
#ifdef NOISY_FIRST_LETTER
printf("RemoveFloatingFirstLetterFrames: textContent=%p oldTextFrame=%p newTextFrame=%p\n",
textContent.get(), textFrame, newTextFrame);
#endif
// Should we call DeletingFrameSubtree on the placeholder instead
// and skip this call?
aFrameManager->UnregisterPlaceholderFrame(placeholderFrame);
// Remove the float frame
DeletingFrameSubtree(aPresContext, aPresShell, aFrameManager, floatFrame);
aFrameManager->RemoveFrame(aBlockFrame, nsLayoutAtoms::floatList,
floatFrame);
// Remove placeholder frame
aFrameManager->RemoveFrame(parentFrame, nsnull, placeholderFrame);
// Insert text frame in its place
aFrameManager->InsertFrames(parentFrame, nsnull,
prevSibling, newTextFrame);
return NS_OK;
}
nsresult
nsCSSFrameConstructor::RemoveFirstLetterFrames(nsPresContext* aPresContext,
nsIPresShell* aPresShell,
nsFrameManager* aFrameManager,
nsIFrame* aFrame,
PRBool* aStopLooking)
{
nsIFrame* prevSibling = nsnull;
nsIFrame* kid = aFrame->GetFirstChild(nsnull);
while (kid) {
nsIAtom* frameType = kid->GetType();
if (nsLayoutAtoms::letterFrame == frameType) {
// Bingo. Found it. First steal away the text frame.
nsIFrame* textFrame = kid->GetFirstChild(nsnull);
if (!textFrame) {
break;
}
// Create a new textframe
nsStyleContext* parentSC = aFrame->GetStyleContext();
if (!parentSC) {
break;
}
nsIContent* textContent = textFrame->GetContent();
if (!textContent) {
break;
}
nsRefPtr<nsStyleContext> newSC;
newSC = aPresShell->StyleSet()->ResolveStyleForNonElement(parentSC);
if (!newSC) {
break;
}
NS_NewTextFrame(aPresShell, &textFrame);
textFrame->Init(aPresContext, textContent, aFrame, newSC, nsnull);
// Next rip out the kid and replace it with the text frame
nsFrameManager* frameManager = aFrameManager;
DeletingFrameSubtree(aPresContext, aPresShell, frameManager, kid);
frameManager->RemoveFrame(aFrame, nsnull, kid);
// Insert text frame in its place
frameManager->InsertFrames(aFrame, nsnull,
prevSibling, textFrame);
*aStopLooking = PR_TRUE;
break;
}
else if ((nsLayoutAtoms::inlineFrame == frameType) ||
(nsLayoutAtoms::lineFrame == frameType) ||
(nsLayoutAtoms::positionedInlineFrame == frameType)) {
// Look inside child inline frame for the letter frame
RemoveFirstLetterFrames(aPresContext, aPresShell, aFrameManager, kid,
aStopLooking);
if (*aStopLooking) {
break;
}
}
prevSibling = kid;
kid = kid->GetNextSibling();
}
return NS_OK;
}
nsresult
nsCSSFrameConstructor::RemoveLetterFrames(nsPresContext* aPresContext,
nsIPresShell* aPresShell,
nsFrameManager* aFrameManager,
nsIFrame* aBlockFrame)
{
PRBool stopLooking = PR_FALSE;
nsresult rv = RemoveFloatingFirstLetterFrames(aPresContext, aPresShell,
aFrameManager,
aBlockFrame, &stopLooking);
if (NS_SUCCEEDED(rv) && !stopLooking) {
rv = RemoveFirstLetterFrames(aPresContext, aPresShell, aFrameManager,
aBlockFrame, &stopLooking);
}
return rv;
}
// Fixup the letter frame situation for the given block
nsresult
nsCSSFrameConstructor::RecoverLetterFrames(nsFrameConstructorState& aState,
nsIFrame* aBlockFrame)
{
nsresult rv = NS_OK;
nsIFrame* blockKids = aBlockFrame->GetFirstChild(nsnull);
nsIFrame* parentFrame = nsnull;
nsIFrame* textFrame = nsnull;
nsIFrame* prevFrame = nsnull;
nsFrameItems letterFrames;
PRBool stopLooking = PR_FALSE;
rv = WrapFramesInFirstLetterFrame(aState, aBlockFrame, blockKids,
&parentFrame, &textFrame, &prevFrame,
letterFrames, &stopLooking);
if (NS_FAILED(rv)) {
return rv;
}
if (parentFrame) {
// Take the old textFrame out of the parents child list
DeletingFrameSubtree(aState.mPresContext, mPresShell,
aState.mFrameManager, textFrame);
parentFrame->RemoveFrame(nsnull, textFrame);
// Insert in the letter frame(s)
parentFrame->InsertFrames(nsnull, prevFrame, letterFrames.childList);
}
return rv;
}
//----------------------------------------------------------------------
// listbox Widget Routines
nsresult
nsCSSFrameConstructor::CreateListBoxContent(nsPresContext* aPresContext,
nsIFrame* aParentFrame,
nsIFrame* aPrevFrame,
nsIContent* aChild,
nsIFrame** aNewFrame,
PRBool aIsAppend,
PRBool aIsScrollbar,
nsILayoutHistoryState* aFrameState)
{
#ifdef MOZ_XUL
nsresult rv = NS_OK;
// Construct a new frame
if (nsnull != aParentFrame) {
nsFrameItems frameItems;
nsFrameConstructorState state(mPresShell, mFixedContainingBlock,
GetAbsoluteContainingBlock(aParentFrame),
GetFloatContainingBlock(aParentFrame),
mTempFrameTreeState);
nsRefPtr<nsStyleContext> styleContext;
styleContext = ResolveStyleContext(aParentFrame, aChild);
// Pre-check for display "none" - only if we find that, do we create
// any frame at all
const nsStyleDisplay* display = styleContext->GetStyleDisplay();
if (NS_STYLE_DISPLAY_NONE == display->mDisplay) {
*aNewFrame = nsnull;
return NS_OK;
}
rv = ConstructFrameInternal(state, aChild,
aParentFrame, aChild->Tag(),
aChild->GetNameSpaceID(),
styleContext, frameItems, PR_FALSE);
nsIFrame* newFrame = frameItems.childList;
*aNewFrame = newFrame;
if (NS_SUCCEEDED(rv) && (nsnull != newFrame)) {
mDocument->BindingManager()->ProcessAttachedQueue();
// Notify the parent frame
if (aIsAppend)
rv = ((nsListBoxBodyFrame*)aParentFrame)->ListBoxAppendFrames(newFrame);
else
rv = ((nsListBoxBodyFrame*)aParentFrame)->ListBoxInsertFrames(aPrevFrame, newFrame);
}
}
return rv;
#else
return NS_ERROR_FAILURE;
#endif
}
//----------------------------------------
nsresult
nsCSSFrameConstructor::ConstructBlock(nsFrameConstructorState& aState,
const nsStyleDisplay* aDisplay,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsIFrame* aContentParentFrame,
nsStyleContext* aStyleContext,
nsIFrame** aNewFrame,
nsFrameItems& aFrameItems,
PRBool aAbsPosContainer)
{
// Create column wrapper if necessary
nsIFrame* blockFrame = *aNewFrame;
nsIFrame* parent = aParentFrame;
nsIFrame* contentParent = aContentParentFrame;
nsRefPtr<nsStyleContext> blockStyle = aStyleContext;
const nsStyleColumn* columns = aStyleContext->GetStyleColumn();
if (columns->mColumnCount != NS_STYLE_COLUMN_COUNT_AUTO
|| columns->mColumnWidth.GetUnit() != eStyleUnit_Auto) {
nsIFrame* columnSetFrame = nsnull;
NS_NewColumnSetFrame(mPresShell, &columnSetFrame, 0);
if (!columnSetFrame) {
return NS_ERROR_OUT_OF_MEMORY;
}
InitAndRestoreFrame(aState, aContent, aParentFrame, aStyleContext, nsnull,
columnSetFrame);
// See if we need to create a view, e.g. the frame is absolutely positioned
nsHTMLContainerFrame::CreateViewForFrame(columnSetFrame, aContentParentFrame,
PR_FALSE);
blockStyle = mPresShell->StyleSet()->
ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::columnContent,
aStyleContext);
contentParent = columnSetFrame;
parent = columnSetFrame;
*aNewFrame = columnSetFrame;
columnSetFrame->SetInitialChildList(aState.mPresContext, nsnull,
blockFrame);
blockFrame->AddStateBits(NS_BLOCK_SPACE_MGR);
}
InitAndRestoreFrame(aState, aContent, parent, blockStyle, nsnull,
blockFrame);
nsresult rv = aState.AddChild(*aNewFrame, aFrameItems, aDisplay,
aContent, aStyleContext,
aContentParentFrame ? aContentParentFrame :
aParentFrame);
if (NS_FAILED(rv)) {
return rv;
}
// See if we need to create a view, e.g. the frame is absolutely positioned
nsHTMLContainerFrame::CreateViewForFrame(blockFrame, contentParent, PR_FALSE);
// If we're the first block to be created (e.g., because we're
// contained inside a XUL document), then make sure that we've got a
// space manager so we can handle floats...
if (! aState.mFloatedItems.containingBlock) {
blockFrame->AddStateBits(NS_BLOCK_SPACE_MGR | NS_BLOCK_MARGIN_ROOT);
}
// ...and that we're the absolute containing block.
// This makes absolute children of a block in columns be positioned
// relative to the container, not flowed into columns. I don't know if this
// is right...
nsFrameConstructorSaveState absoluteSaveState;
if (aAbsPosContainer || !aState.mAbsoluteItems.containingBlock) {
// NS_ASSERTION(aRelPos, "should have made area frame for this");
aState.PushAbsoluteContainingBlock(blockFrame, absoluteSaveState);
}
// See if the block has first-letter style applied to it...
PRBool haveFirstLetterStyle, haveFirstLineStyle;
HaveSpecialBlockStyle(aContent, aStyleContext,
&haveFirstLetterStyle, &haveFirstLineStyle);
// Process the child content
nsFrameItems childItems;
nsFrameConstructorSaveState floatSaveState;
aState.PushFloatContainingBlock(blockFrame, floatSaveState,
haveFirstLetterStyle,
haveFirstLineStyle);
rv = ProcessChildren(aState, aContent, blockFrame, PR_TRUE, childItems,
PR_TRUE);
CreateAnonymousFrames(aContent->Tag(), aState, aContent, blockFrame,
PR_FALSE, childItems);
// Set the frame's initial child list
blockFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
return rv;
}
PRBool
nsCSSFrameConstructor::AreAllKidsInline(nsIFrame* aFrameList)
{
nsIFrame* kid = aFrameList;
while (kid) {
if (!IsInlineFrame(kid)) {
return PR_FALSE;
}
kid = kid->GetNextSibling();
}
return PR_TRUE;
}
nsresult
nsCSSFrameConstructor::ConstructInline(nsFrameConstructorState& aState,
const nsStyleDisplay* aDisplay,
nsIContent* aContent,
nsIFrame* aParentFrame,
nsStyleContext* aStyleContext,
PRBool aIsPositioned,
nsIFrame* aNewFrame)
{
// Initialize the frame
InitAndRestoreFrame(aState, aContent, aParentFrame, aStyleContext, nsnull,
aNewFrame);
nsFrameConstructorSaveState absoluteSaveState; // definition cannot be inside next block
// because the object's destructor is significant
// this is part of the fix for bug 42372
// Any inline frame might need a view (because of opacity, or fixed background)
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(aNewFrame, nsnull, PR_FALSE);
if (aIsPositioned) {
// Relatively positioned frames becomes a container for child
// frames that are positioned
aState.PushAbsoluteContainingBlock(aNewFrame, absoluteSaveState);
}
// Process the child content
nsFrameItems childItems;
PRBool kidsAllInline;
nsresult rv = ProcessInlineChildren(aState, aContent, aNewFrame, PR_TRUE,
childItems, &kidsAllInline);
if (kidsAllInline) {
// Set the inline frame's initial child list
CreateAnonymousFrames(aContent->Tag(), aState, aContent, aNewFrame,
PR_FALSE, childItems);
aNewFrame->SetInitialChildList(aState.mPresContext, nsnull,
childItems.childList);
return rv;
}
// This inline frame contains several types of children. Therefore
// this frame has to be chopped into several pieces. We will produce
// as a result of this 3 lists of children. The first list contains
// all of the inline children that preceed the first block child
// (and may be empty). The second list contains all of the block
// children and any inlines that are between them (and must not be
// empty, otherwise - why are we here?). The final list contains all
// of the inline children that follow the final block child.
// Find the first block child which defines list1 and list2
nsIFrame* list1 = childItems.childList;
nsIFrame* prevToFirstBlock;
nsIFrame* list2 = FindFirstBlock(list1, &prevToFirstBlock);
if (prevToFirstBlock) {
prevToFirstBlock->SetNextSibling(nsnull);
}
else {
list1 = nsnull;
}
// Find the last block child which defines the end of list2 and the
// start of list3
nsIFrame* afterFirstBlock = list2->GetNextSibling();
nsIFrame* list3 = nsnull;
nsIFrame* lastBlock = FindLastBlock(afterFirstBlock);
if (!lastBlock) {
lastBlock = list2;
}
list3 = lastBlock->GetNextSibling();
lastBlock->SetNextSibling(nsnull);
// list1's frames belong to this inline frame so go ahead and take them
aNewFrame->SetInitialChildList(aState.mPresContext, nsnull, list1);
// list2's frames belong to an anonymous block that we create right
// now. The anonymous block will be the parent of the block children
// of the inline.
nsIFrame* blockFrame;
nsIAtom* blockStyle;
if (aIsPositioned) {
NS_NewRelativeItemWrapperFrame(mPresShell, &blockFrame);
blockStyle = nsCSSAnonBoxes::mozAnonymousPositionedBlock;
}
else {
NS_NewBlockFrame(mPresShell, &blockFrame);
blockStyle = nsCSSAnonBoxes::mozAnonymousBlock;
}
nsRefPtr<nsStyleContext> blockSC;
blockSC = mPresShell->StyleSet()->ResolvePseudoStyleFor(aContent, blockStyle,
aStyleContext);
InitAndRestoreFrame(aState, aContent, aParentFrame, blockSC, nsnull,
blockFrame);
// Any inline frame could have a view (e.g., opacity)
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(blockFrame, nsnull, PR_FALSE);
if (blockFrame->HasView() || aNewFrame->HasView()) {
// Move list2's frames into the new view
nsHTMLContainerFrame::ReparentFrameViewList(aState.mPresContext, list2,
list2->GetParent(), blockFrame);
}
blockFrame->SetInitialChildList(aState.mPresContext, nsnull, list2);
nsFrameConstructorState state(mPresShell, mFixedContainingBlock,
GetAbsoluteContainingBlock(blockFrame),
GetFloatContainingBlock(blockFrame));
// XXXbz MoveChildrenTo just sets parent pointers on the out-of-flows!
// Shouldn't it move the frames to the right child list too? Right now, if
// we have an inline between two blocks all inside an inline and the inner
// inline contains a float, the float will end up in the float list of the
// parent block of the inline, but its parent pointer will be the anonymous
// block we create....
MoveChildrenTo(state.mFrameManager, blockSC, blockFrame, list2, &state);
// list3's frames belong to another inline frame
nsIFrame* inlineFrame = nsnull;
if (list3) {
if (aIsPositioned) {
NS_NewPositionedInlineFrame(mPresShell, &inlineFrame);
}
else {
NS_NewInlineFrame(mPresShell, &inlineFrame);
}
InitAndRestoreFrame(aState, aContent, aParentFrame, aStyleContext, nsnull,
inlineFrame);
// Any frame might need a view
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(inlineFrame, nsnull, PR_FALSE);
if (inlineFrame->HasView() || aNewFrame->HasView()) {
// Move list3's frames into the new view
nsHTMLContainerFrame::ReparentFrameViewList(aState.mPresContext, list3,
list3->GetParent(), inlineFrame);
}
// Reparent (cheaply) the frames in list3 - we don't have to futz
// with their style context because they already have the right one.
inlineFrame->SetInitialChildList(aState.mPresContext, nsnull, list3);
MoveChildrenTo(aState.mFrameManager, nsnull, inlineFrame, list3, nsnull);
}
// Mark the 3 frames as special. That way if any of the
// append/insert/remove methods try to fiddle with the children, the
// containing block will be reframed instead.
SetFrameIsSpecial(aNewFrame, blockFrame);
SetFrameIsSpecial(blockFrame, inlineFrame);
MarkIBSpecialPrevSibling(aState.mPresContext, blockFrame, aNewFrame);
if (inlineFrame)
SetFrameIsSpecial(inlineFrame, nsnull);
#ifdef DEBUG
if (gNoisyInlineConstruction) {
nsIFrameDebug* frameDebug;
printf("nsCSSFrameConstructor::ConstructInline:\n");
if (NS_SUCCEEDED(CallQueryInterface(aNewFrame, &frameDebug))) {
printf(" ==> leading inline frame:\n");
frameDebug->List(aState.mPresContext, stdout, 2);
}
if (NS_SUCCEEDED(CallQueryInterface(blockFrame, &frameDebug))) {
printf(" ==> block frame:\n");
frameDebug->List(aState.mPresContext, stdout, 2);
}
if (inlineFrame &&
NS_SUCCEEDED(CallQueryInterface(inlineFrame, &frameDebug))) {
printf(" ==> trailing inline frame:\n");
frameDebug->List(aState.mPresContext, stdout, 2);
}
}
#endif
return rv;
}
nsresult
nsCSSFrameConstructor::ProcessInlineChildren(nsFrameConstructorState& aState,
nsIContent* aContent,
nsIFrame* aFrame,
PRBool aCanHaveGeneratedContent,
nsFrameItems& aFrameItems,
PRBool* aKidsAllInline)
{
nsresult rv = NS_OK;
nsStyleContext* styleContext = nsnull;
// save the pseudo frame state
nsPseudoFrames prevPseudoFrames;
aState.mPseudoFrames.Reset(&prevPseudoFrames);
if (aCanHaveGeneratedContent) {
// Probe for generated content before
nsIFrame* generatedFrame;
styleContext = aFrame->GetStyleContext();
if (CreateGeneratedContentFrame(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::before,
&generatedFrame)) {
// Add the generated frame to the child list
aFrameItems.AddChild(generatedFrame);
}
}
// Iterate the child content objects and construct frames
PRBool allKidsInline = PR_TRUE;
ChildIterator iter, last;
for (ChildIterator::Init(aContent, &iter, &last);
iter != last;
++iter) {
// Construct a child frame
nsIFrame* oldLastChild = aFrameItems.lastChild;
rv = ConstructFrame(aState, nsCOMPtr<nsIContent>(*iter),
aFrame, aFrameItems);
if (NS_FAILED(rv)) {
return rv;
}
// Examine newly added children (we may have added more than one
// child if the child was another inline frame that ends up
// being carved in 3 pieces) to maintain the allKidsInline flag.
if (allKidsInline) {
nsIFrame* kid;
if (oldLastChild) {
kid = oldLastChild->GetNextSibling();
}
else {
kid = aFrameItems.childList;
}
while (kid) {
if (!IsInlineFrame(kid)) {
allKidsInline = PR_FALSE;
break;
}
kid = kid->GetNextSibling();
}
}
}
if (aCanHaveGeneratedContent) {
// Probe for generated content after
nsIFrame* generatedFrame;
if (CreateGeneratedContentFrame(aState, aFrame, aContent,
styleContext, nsCSSPseudoElements::after,
&generatedFrame)) {
// Add the generated frame to the child list
aFrameItems.AddChild(generatedFrame);
}
}
*aKidsAllInline = allKidsInline;
// process the current pseudo frame state
if (!aState.mPseudoFrames.IsEmpty()) {
ProcessPseudoFrames(aState, aFrameItems);
}
// restore the pseudo frame state
aState.mPseudoFrames = prevPseudoFrames;
return rv;
}
PRBool
nsCSSFrameConstructor::WipeContainingBlock(nsFrameConstructorState& aState,
nsIFrame* aContainingBlock,
nsIFrame* aFrame,
nsIFrame* aFrameList)
{
// Before we go and append the frames, check for a special
// situation: an inline frame that will now contain block
// frames. This is a no-no and the frame construction logic knows
// how to fix this.
// If we don't have a block within an inline, just return false.
// XXX We should be more careful about |aFrame| being something
// constructed by tag name (see the SELECT check all callers currenly
// do).
if (NS_STYLE_DISPLAY_INLINE != aFrame->GetStyleDisplay()->mDisplay ||
AreAllKidsInline(aFrameList))
return PR_FALSE;
// Ok, reverse tracks: wipe out the frames we just created
nsFrameManager *frameManager = aState.mFrameManager;
nsPresContext *presContext = aState.mPresContext;
// Destroy the frames. As we do make sure any content to frame mappings
// or entries in the undisplayed content map are removed
frameManager->ClearAllUndisplayedContentIn(aFrame->GetContent());
CleanupFrameReferences(presContext, frameManager, aFrameList);
if (aState.mAbsoluteItems.childList) {
CleanupFrameReferences(presContext, frameManager, aState.mAbsoluteItems.childList);
}
if (aState.mFixedItems.childList) {
CleanupFrameReferences(presContext, frameManager, aState.mFixedItems.childList);
}
if (aState.mFloatedItems.childList) {
CleanupFrameReferences(presContext, frameManager, aState.mFloatedItems.childList);
}
nsFrameList tmp(aFrameList);
tmp.DestroyFrames(presContext);
tmp.SetFrames(aState.mAbsoluteItems.childList);
tmp.DestroyFrames(presContext);
aState.mAbsoluteItems.childList = nsnull;
tmp.SetFrames(aState.mFixedItems.childList);
tmp.DestroyFrames(presContext);
aState.mFixedItems.childList = nsnull;
tmp.SetFrames(aState.mFloatedItems.childList);
tmp.DestroyFrames(presContext);
aState.mFloatedItems.childList = nsnull;
// Tell parent of the containing block to reformulate the
// entire block. This is painful and definitely not optimal
// but it will *always* get the right answer.
// First, if the containing block is really a block wrapper for something
// that's really an inline, walk up the parent chain until we hit something
// that's not.
while (IsFrameSpecial(aContainingBlock))
aContainingBlock = aContainingBlock->GetParent();
nsIContent *blockContent = aContainingBlock->GetContent();
nsCOMPtr<nsIContent> parentContainer = blockContent->GetParent();
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf("nsCSSFrameConstructor::WipeContainingBlock: blockContent=%p parentContainer=%p\n",
NS_STATIC_CAST(void*, blockContent),
NS_STATIC_CAST(void*, parentContainer));
}
#endif
if (parentContainer) {
ReinsertContent(parentContainer, blockContent);
}
else {
NS_ERROR("uh oh. the block we need to reframe has no parent!");
}
return PR_TRUE;
}
/*
* Recursively split an inline frame until we reach a block frame.
* Below is an example of how SplitToContainingBlock() works.
*
* 1. In the initial state, you've got a block frame |B| that contains
* a bunch of inline frames eventually winding down to the <object>
* frame |o|. (Block frames are indicated with upper case letters,
* inline frames are indicated with lower case.)
*
* A-->B-->C
* |
* i-->j-->k
* |
* l-->m-->n
* |
* o
*
* 2. Now the object frame |o| gets split into the left inlines |o|,
* the block frames |O|, and the right inlines |o'|.
*
* o O o'
*
* 3. We call SplitToContainingBlock(), which will split |m| as follows.
*
* .--------.
* / \
* l-->m==>M==>m' n
* | | |
* o O o'
*
* Note that |m| gets split into |M| and |m'|, which correspond to
* the anonymous block and inline frames,
* respectively. Furthermore, note that |m| still refers to |n| as
* its next sibling, and that |m'| does not yet have a next sibling.
*
* The double-arrow line indicates that an annotation is made in
* the frame manager that indicates |M| is the ``special sibling''
* of |m|, and that |m'| is the ``special sibling'' of |M|.
*
* 4. We recurse again to split |j|. At this point, we'll break the
* link between |m| and |n|, and make |n| be the next sibling of
* |m'|.
*
* .-----------.
* / \
* i-->j=====>J==>j' k
* | | |
* l-->m=>M==>m'-->n
* | | |
* o O o'
*
* As before, |j| retains |k| as its next sibling, and |j'| is not
* yet assigned its next sibling.
*
* 5. When we hit B, the recursion terminates. We now insert |J| and
* |j'| immediately after |j|, resulting in the following frame
* model. This is done using the "normal" frame insertion
* mechanism, nsIFrame::InsertFrames(), which properly recomputes
* the line boxes.
*
* A-->B-->C
* |
* i-->j-=-=-=>J-=->j'-->k
* | | |
* l-->m==>M===>m'-->n
* | | |
* o O o'
*
* Since B is a block, it is allowed to contain both block and
* inline frames, so we can let |J| and |j'| be "real siblings" of
* |j|.
*
* Note that |J| is both the ``normal'' sibling and ``special''
* sibling of |j|, and |j'| is both the ``normal'' and ``special''
* sibling of |J|.
*/
nsresult
nsCSSFrameConstructor::SplitToContainingBlock(nsFrameConstructorState& aState,
nsIFrame* aFrame,
nsIFrame* aLeftInlineChildFrame,
nsIFrame* aBlockChildFrame,
nsIFrame* aRightInlineChildFrame,
PRBool aTransfer)
{
// If aFrame is an inline frame, then recursively "split" it until
// we reach a block frame. aLeftInlineChildFrame is the original
// inline child of aFrame (or null, if there were no frames to the
// left of the new block); aBlockChildFrame and
// aRightInlineChildFrame are the newly created frames that were
// constructed as a result of the previous recursion's
// "split". aRightInlineChildFrame may be null if there are no
// inlines to the right of the new block.
//
// aBlockChildFrame and aRightInlineChildFrame will be "orphaned" frames upon
// entry to this routine; that is, they won't be parented. We'll
// assign them proper parents.
NS_PRECONDITION(aFrame != nsnull, "no frame to split");
if (! aFrame)
return NS_ERROR_NULL_POINTER;
NS_PRECONDITION(aBlockChildFrame != nsnull, "no block child");
if (! aBlockChildFrame)
return NS_ERROR_NULL_POINTER;
if (IsBlockFrame(aFrame)) {
// If aFrame is a block frame, then we're done: make
// aBlockChildFrame and aRightInlineChildFrame children of aFrame,
// and insert aBlockChildFrame and aRightInlineChildFrame after
// aLeftInlineChildFrame
aBlockChildFrame->SetParent(aFrame);
if (aRightInlineChildFrame)
aRightInlineChildFrame->SetParent(aFrame);
aBlockChildFrame->SetNextSibling(aRightInlineChildFrame);
aFrame->InsertFrames(nsnull, aLeftInlineChildFrame, aBlockChildFrame);
// If aLeftInlineChild has a view...
if (aLeftInlineChildFrame && aLeftInlineChildFrame->HasView()) {
// ...create a new view for the block child, and reparent views
// XXXbz should we be passing in a non-null aContentParentFrame?
// force creation of a view; it'll probably need one anyway since it
// has the same style context, and it's easier to think about if we can
// be sure the left inlines, the block and the right inlines all have a view
nsHTMLContainerFrame::CreateViewForFrame(aBlockChildFrame, nsnull, PR_TRUE);
nsIFrame* frame = aBlockChildFrame->GetFirstChild(nsnull);
nsHTMLContainerFrame::ReparentFrameViewList(aState.mPresContext, frame,
aLeftInlineChildFrame,
aBlockChildFrame);
if (aRightInlineChildFrame) {
// Same for the right inline children
// XXXbz should we be passing in a non-null aContentParentFrame?
nsHTMLContainerFrame::CreateViewForFrame(aRightInlineChildFrame,
nsnull, PR_TRUE);
frame = aRightInlineChildFrame->GetFirstChild(nsnull);
nsHTMLContainerFrame::ReparentFrameViewList(aState.mPresContext, frame,
aLeftInlineChildFrame,
aRightInlineChildFrame);
}
}
return NS_OK;
}
// Otherwise, aFrame is inline. Split it, and recurse to find the
// containing block frame.
nsIContent* content = aFrame->GetContent();
// Create an "anonymous block" frame that will parent
// aBlockChildFrame. The new frame won't have a parent yet: the recursion
// will parent it.
nsIFrame* blockFrame;
NS_NewBlockFrame(mPresShell, &blockFrame);
if (! blockFrame)
return NS_ERROR_OUT_OF_MEMORY;
nsStyleContext* styleContext = aFrame->GetStyleContext();
nsRefPtr<nsStyleContext> blockSC;
blockSC = mPresShell->StyleSet()->
ResolvePseudoStyleFor(content, nsCSSAnonBoxes::mozAnonymousBlock,
styleContext);
InitAndRestoreFrame(aState, content, nsnull, blockSC, nsnull, blockFrame);
blockFrame->SetInitialChildList(aState.mPresContext, nsnull, aBlockChildFrame);
MoveChildrenTo(aState.mFrameManager, blockSC, blockFrame, aBlockChildFrame,
nsnull);
// Create an anonymous inline frame that will parent
// aRightInlineChildFrame. The new frame won't have a parent yet:
// the recursion will parent it.
// XXXldb Why bother if |aRightInlineChildFrame| is null?
nsIFrame* inlineFrame = nsnull;
NS_NewInlineFrame(mPresShell, &inlineFrame);
if (! inlineFrame)
return NS_ERROR_OUT_OF_MEMORY;
InitAndRestoreFrame(aState, content, nsnull, styleContext, nsnull,
inlineFrame);
inlineFrame->SetInitialChildList(aState.mPresContext, nsnull,
aRightInlineChildFrame);
MoveChildrenTo(aState.mFrameManager, nsnull, inlineFrame,
aRightInlineChildFrame, nsnull);
// Make the "special" inline-block linkage between aFrame and the
// newly created anonymous frames. We need to create the linkage
// between the first in flow, so if we're a continuation frame, walk
// back to find it.
nsIFrame* firstInFlow = aFrame->GetFirstInFlow();
SetFrameIsSpecial(firstInFlow, blockFrame);
SetFrameIsSpecial(blockFrame, inlineFrame);
SetFrameIsSpecial(inlineFrame, nsnull);
MarkIBSpecialPrevSibling(aState.mPresContext, blockFrame, firstInFlow);
// If we have a continuation frame, then we need to break the
// continuation.
nsIFrame* nextInFlow = aFrame->GetNextInFlow();
if (nextInFlow) {
aFrame->SetNextInFlow(nsnull);
nextInFlow->SetPrevInFlow(nsnull);
}
// This is where the mothership lands and we start to get a bit
// funky. We're going to do a bit of work to ensure that the frames
// from the *last* recursion are properly hooked up.
//
// aTransfer will be set once the recursion begins to nest. (It's
// not set at the first level of recursion, because
// aLeftInlineChildFrame, aBlockChildFrame, and
// aRightInlineChildFrame already have their sibling and parent
// pointers properly initialized.)
//
// Once we begin to nest recursion, aLeftInlineChildFrame
// corresponds to the original inline that we're trying to split,
// and aBlockChildFrame and aRightInlineChildFrame are the anonymous
// frames we created to protect the inline-block invariant.
if (aTransfer) {
// We'd better have the left- and right-inline children!
NS_ASSERTION(aLeftInlineChildFrame != nsnull, "no left inline child frame");
NS_ASSERTION(aRightInlineChildFrame != nsnull, "no right inline child frame");
// We need to move any successors of the original inline
// (aLeftInlineChildFrame) to aRightInlineChildFrame.
nsIFrame* nextInlineFrame = aLeftInlineChildFrame->GetNextSibling();
aLeftInlineChildFrame->SetNextSibling(nsnull);
aRightInlineChildFrame->SetNextSibling(nextInlineFrame);
// Any frame that was moved will need its parent pointer fixed,
// and will need to be marked as dirty.
while (nextInlineFrame) {
nextInlineFrame->SetParent(inlineFrame);
nextInlineFrame->AddStateBits(NS_FRAME_IS_DIRTY);
nextInlineFrame = nextInlineFrame->GetNextSibling();
}
}
// Recurse to the parent frame. This will assign a parent frame to
// each new frame we've just created.
nsIFrame* parent = aFrame->GetParent();
NS_ASSERTION(parent != nsnull, "frame has no geometric parent");
if (! parent)
return NS_ERROR_FAILURE;
// When we recur, we'll make the "left inline child frame" be the
// inline frame we've just begun to "split", and we'll pass the
// newly created anonymous frames as aBlockChildFrame and
// aRightInlineChildFrame.
return SplitToContainingBlock(aState, parent, aFrame, blockFrame, inlineFrame, PR_TRUE);
}
nsresult
nsCSSFrameConstructor::ReframeContainingBlock(nsIFrame* aFrame)
{
#ifdef DEBUG
PRBool isAttinasi = PR_FALSE;
#ifdef DEBUG_attinasi
isAttinasi = PR_TRUE;
#endif // DEBUG_attinasi
// ReframeContainingBlock is a NASTY routine, it causes terrible performance problems
// so I want to see when it is happening! Unfortunately, it is happening way to often because
// so much content on the web causes 'special' block-in-inline frame situations and we handle them
// very poorly
if (gNoisyContentUpdates || isAttinasi) {
printf("nsCSSFrameConstructor::ReframeContainingBlock frame=%p\n",
NS_STATIC_CAST(void*, aFrame));
}
#endif
PRBool isReflowing;
mPresShell->IsReflowLocked(&isReflowing);
if(isReflowing) {
// don't ReframeContainingBlock, this will result in a crash
// if we remove a tree that's in reflow - see bug 121368 for testcase
NS_ASSERTION(0, "Atemptted to nsCSSFrameConstructor::ReframeContainingBlock during a Reflow!!!");
return NS_OK;
}
// Get the first "normal" ancestor of the target frame.
nsIFrame* containingBlock = GetIBContainingBlockFor(aFrame);
if (containingBlock) {
// From here we look for the containing block in case the target
// frame is already a block (which can happen when an inline frame
// wraps some of its content in an anonymous block; see
// ConstructInline)
// NOTE: We used to get the FloatContainingBlock here, but it was often wrong.
// GetIBContainingBlock works much better and provides the correct container in all cases
// so GetFloatContainingBlock(aFrame) has been removed
// And get the containingBlock's content
nsCOMPtr<nsIContent> blockContent = containingBlock->GetContent();
if (blockContent) {
// Now find the containingBlock's content's parent
nsCOMPtr<nsIContent> parentContainer = blockContent->GetParent();
if (parentContainer) {
#ifdef DEBUG
if (gNoisyContentUpdates) {
printf(" ==> blockContent=%p, parentContainer=%p\n",
NS_STATIC_CAST(void*, blockContent),
NS_STATIC_CAST(void*, parentContainer));
}
#endif
return ReinsertContent(parentContainer, blockContent);
}
}
}
// If we get here, we're screwed!
return ReconstructDocElementHierarchy();
}
nsresult nsCSSFrameConstructor::RemoveFixedItems(const nsFrameConstructorState& aState)
{
nsresult rv=NS_OK;
if (mFixedContainingBlock) {
nsIFrame *fixedChild = nsnull;
do {
fixedChild = mFixedContainingBlock->GetFirstChild(nsLayoutAtoms::fixedList);
if (fixedChild) {
// Remove the placeholder so it doesn't end up sitting about pointing
// to the removed fixed frame.
nsIFrame *placeholderFrame;
mPresShell->GetPlaceholderFrameFor(fixedChild, &placeholderFrame);
NS_ASSERTION(placeholderFrame, "no placeholder for fixed-pos frame");
nsIFrame* placeholderParent = placeholderFrame->GetParent();
DeletingFrameSubtree(aState.mPresContext, mPresShell, aState.mFrameManager,
placeholderFrame);
rv = aState.mFrameManager->RemoveFrame(placeholderParent, nsnull,
placeholderFrame);
if (NS_FAILED(rv)) {
NS_WARNING("Error removing placeholder for fixed frame in RemoveFixedItems");
break;
}
DeletingFrameSubtree(aState.mPresContext, mPresShell, aState.mFrameManager,
fixedChild);
rv = aState.mFrameManager->RemoveFrame(mFixedContainingBlock,
nsLayoutAtoms::fixedList,
fixedChild);
if (NS_FAILED(rv)) {
NS_WARNING("Error removing frame from fixed containing block in RemoveFixedItems");
break;
}
}
} while(fixedChild);
} else {
NS_WARNING( "RemoveFixedItems called with no FixedContainingBlock data member set");
}
return rv;
}
PR_STATIC_CALLBACK(PLDHashOperator)
CollectRestyles(nsISupports* aContent,
nsCSSFrameConstructor::RestyleData& aData,
void* aRestyleArrayPtr)
{
nsCSSFrameConstructor::RestyleEnumerateData** restyleArrayPtr =
NS_STATIC_CAST(nsCSSFrameConstructor::RestyleEnumerateData**,
aRestyleArrayPtr);
nsCSSFrameConstructor::RestyleEnumerateData* currentRestyle =
*restyleArrayPtr;
currentRestyle->mContent = NS_STATIC_CAST(nsIContent*, aContent);
currentRestyle->mRestyleHint = aData.mRestyleHint;
currentRestyle->mChangeHint = aData.mChangeHint;
// Increment to the next slot in the array
*restyleArrayPtr = currentRestyle + 1;
return PL_DHASH_NEXT;
}
void
nsCSSFrameConstructor::ProcessOneRestyle(nsIContent* aContent,
nsReStyleHint aRestyleHint,
nsChangeHint aChangeHint)
{
NS_PRECONDITION(aContent, "Must have content node");
if (!aContent->IsInDoc() ||
aContent->GetCurrentDoc() != mDocument) {
// Content node has been removed from our document; nothing else
// to do here
return;
}
nsIFrame* primaryFrame = nsnull;
mPresShell->GetPrimaryFrameFor(aContent, &primaryFrame);
if (aRestyleHint & eReStyle_Self) {
RestyleElement(aContent, primaryFrame, aChangeHint);
} else if (aChangeHint &&
(primaryFrame ||
(aChangeHint & nsChangeHint_ReconstructFrame))) {
// Don't need to recompute style; just apply the hint
nsStyleChangeList changeList;
changeList.AppendChange(primaryFrame, aContent, aChangeHint);
ProcessRestyledFrames(changeList);
}
if (aRestyleHint & eReStyle_LaterSiblings) {
RestyleLaterSiblings(aContent);
}
}
void
nsCSSFrameConstructor::ProcessPendingRestyles()
{
NS_PRECONDITION(mDocument, "No document? Pshaw!\n");
nsCSSFrameConstructor::RestyleEnumerateData* restylesToProcess =
new nsCSSFrameConstructor::RestyleEnumerateData[mPendingRestyles.Count()];
if (!restylesToProcess) {
return;
}
nsCSSFrameConstructor::RestyleEnumerateData* lastRestyle = restylesToProcess;
mPendingRestyles.Enumerate(CollectRestyles, &lastRestyle);
NS_ASSERTION(lastRestyle - restylesToProcess ==
PRInt32(mPendingRestyles.Count()),
"Enumeration screwed up somehow");
// Clear the hashtable so we don't end up trying to process a restyle we're
// already processing, sending us into an infinite loop.
mPendingRestyles.Clear();
for (nsCSSFrameConstructor::RestyleEnumerateData* currentRestyle =
restylesToProcess;
currentRestyle != lastRestyle;
++currentRestyle) {
ProcessOneRestyle(currentRestyle->mContent,
currentRestyle->mRestyleHint,
currentRestyle->mChangeHint);
}
delete [] restylesToProcess;
}
void
nsCSSFrameConstructor::PostRestyleEvent(nsIContent* aContent,
nsReStyleHint aRestyleHint,
nsChangeHint aMinChangeHint)
{
if (aRestyleHint == 0 && !aMinChangeHint) {
// Nothing to do here
return;
}
RestyleData existingData;
existingData.mRestyleHint = nsReStyleHint(0);
existingData.mChangeHint = NS_STYLE_HINT_NONE;
mPendingRestyles.Get(aContent, &existingData);
existingData.mRestyleHint =
nsReStyleHint(existingData.mRestyleHint | aRestyleHint);
NS_UpdateHint(existingData.mChangeHint, aMinChangeHint);
mPendingRestyles.Put(aContent, existingData);
nsCOMPtr<nsIEventQueue> eventQueue;
mEventQueueService->GetSpecialEventQueue(nsIEventQueueService::UI_THREAD_EVENT_QUEUE,
getter_AddRefs(eventQueue));
if (eventQueue != mRestyleEventQueue) {
RestyleEvent* ev = new RestyleEvent(this);
if (NS_FAILED(eventQueue->PostEvent(ev))) {
PL_DestroyEvent(ev);
// XXXbz and what?
} else {
mRestyleEventQueue = eventQueue;
}
}
}
void nsCSSFrameConstructor::RestyleEvent::HandleEvent() {
nsCSSFrameConstructor* constructor =
NS_STATIC_CAST(nsCSSFrameConstructor*, owner);
nsIViewManager* viewManager =
constructor->mDocument->GetShellAt(0)->GetPresContext()->GetViewManager();
NS_ASSERTION(viewManager, "Must have view manager for update");
viewManager->BeginUpdateViewBatch();
constructor->mRestyleEventQueue = nsnull;
constructor->ProcessPendingRestyles();
viewManager->EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC);
}
PR_STATIC_CALLBACK(void*)
HandleRestyleEvent(PLEvent* aEvent)
{
nsCSSFrameConstructor::RestyleEvent* evt =
NS_STATIC_CAST(nsCSSFrameConstructor::RestyleEvent*, aEvent);
evt->HandleEvent();
return nsnull;
}
PR_STATIC_CALLBACK(void)
DestroyRestyleEvent(PLEvent* aEvent)
{
delete NS_STATIC_CAST(nsCSSFrameConstructor::RestyleEvent*, aEvent);
}
nsCSSFrameConstructor::RestyleEvent::RestyleEvent(nsCSSFrameConstructor* aConstructor)
{
NS_PRECONDITION(aConstructor, "Must have a constructor!");
PL_InitEvent(this, aConstructor,
::HandleRestyleEvent, ::DestroyRestyleEvent);
}
nsresult
nsCSSFrameConstructor::CreateInsertionPointChildren(nsFrameConstructorState &aState,
nsIFrame *aNewFrame,
PRBool aUseInsertionFrame)
{
nsIContent *creatorContent = aState.mAnonymousCreator->GetContent();
nsFrameItems insertionItems;
nsIFrame *insertionFrame =
aUseInsertionFrame ? aNewFrame->GetContentInsertionFrame() : aNewFrame;
nsresult rv = ProcessChildren(aState, creatorContent, insertionFrame,
PR_TRUE, insertionItems,
aState.mCreatorIsBlock);
if (NS_SUCCEEDED(rv) && insertionItems.childList) {
rv = AppendFrames(aState, creatorContent, insertionFrame,
insertionItems.childList);
}
return rv;
}
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