9fe40dbd60
instead of the containing block of kids. Fix the containing block calculations for various cases of absolutely positioned descendants of relatively positioned inlines (eg make "right" and "bottom" work in those situations). Bug 135082, r+sr=dbaron
2544 lines
97 KiB
C++
2544 lines
97 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
|
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
|
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* The Initial Developer of the Original Code is
|
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
|
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* Contributor(s):
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*
|
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* Alternatively, the contents of this file may be used under the terms of
|
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* either of the GNU General Public License Version 2 or later (the "GPL"),
|
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
|
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* of those above. If you wish to allow use of your version of this file only
|
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* under the terms of either the GPL or the LGPL, and not to allow others to
|
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* use your version of this file under the terms of the MPL, indicate your
|
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* decision by deleting the provisions above and replace them with the notice
|
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* and other provisions required by the GPL or the LGPL. If you do not delete
|
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsCOMPtr.h"
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|
#include "nsStyleConsts.h"
|
|
#include "nsCSSAnonBoxes.h"
|
|
#include "nsFrame.h"
|
|
#include "nsIContent.h"
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|
#include "nsHTMLAtoms.h"
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|
#include "nsIPresContext.h"
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|
#include "nsIPresShell.h"
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|
#include "nsLayoutAtoms.h"
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|
#include "nsIDeviceContext.h"
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|
#include "nsIRenderingContext.h"
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|
#include "nsIFontMetrics.h"
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|
#include "nsBlockFrame.h"
|
|
#include "nsLineBox.h"
|
|
#include "nsImageFrame.h"
|
|
#include "nsIPref.h"
|
|
#include "nsIServiceManager.h"
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|
#include "nsIPercentHeightObserver.h"
|
|
#ifdef IBMBIDI
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|
#include "nsBidiUtils.h"
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|
#endif
|
|
|
|
#ifdef NS_DEBUG
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|
#undef NOISY_VERTICAL_ALIGN
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|
#else
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|
#undef NOISY_VERTICAL_ALIGN
|
|
#endif
|
|
|
|
// Prefs-driven control for |text-decoration: blink|
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|
static PRPackedBool sPrefIsLoaded = PR_FALSE;
|
|
static PRPackedBool sBlinkIsAllowed = PR_TRUE;
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|
|
|
enum eNormalLineHeightControl {
|
|
eUninitialized = -1,
|
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eNoExternalLeading = 0, // does not include external leading
|
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eIncludeExternalLeading, // use whatever value font vendor provides
|
|
eCompensateLeading // compensate leading if leading provided by font vendor is not enough
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|
};
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|
|
|
#ifdef FONT_LEADING_APIS_V2
|
|
static eNormalLineHeightControl sNormalLineHeightControl = eUninitialized;
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|
#endif
|
|
|
|
#ifdef DEBUG
|
|
const char*
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|
nsHTMLReflowState::ReasonToString(nsReflowReason aReason)
|
|
{
|
|
static const char* reasons[] = {
|
|
"initial", "incremental", "resize", "style-change", "dirty"
|
|
};
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|
|
|
return reasons[aReason];
|
|
}
|
|
#endif
|
|
|
|
// Initialize a <b>root</b> reflow state with a rendering context to
|
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// use for measuring things.
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|
nsHTMLReflowState::nsHTMLReflowState(nsIPresContext* aPresContext,
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nsIFrame* aFrame,
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nsReflowReason aReason,
|
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nsIRenderingContext* aRenderingContext,
|
|
const nsSize& aAvailableSpace)
|
|
: mReflowDepth(0)
|
|
{
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|
NS_PRECONDITION(nsnull != aRenderingContext, "no rendering context");
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parentReflowState = nsnull;
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frame = aFrame;
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reason = aReason;
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path = nsnull;
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availableWidth = aAvailableSpace.width;
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availableHeight = aAvailableSpace.height;
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|
rendContext = aRenderingContext;
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|
mSpaceManager = nsnull;
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|
mLineLayout = nsnull;
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mFlags.mSpecialHeightReflow = PR_FALSE;
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|
mFlags.mIsTopOfPage = PR_FALSE;
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|
mFlags.mUnused = 0;
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|
mPercentHeightObserver = nsnull;
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|
mPercentHeightReflowInitiator = nsnull;
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Init(aPresContext);
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#ifdef IBMBIDI
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mFlags.mVisualBidiFormControl = IsBidiFormControl(aPresContext);
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mRightEdge = NS_UNCONSTRAINEDSIZE;
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|
#endif
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|
}
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|
|
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// Initialize a <b>root</b> reflow state for an <b>incremental</b>
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// reflow.
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nsHTMLReflowState::nsHTMLReflowState(nsIPresContext* aPresContext,
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nsIFrame* aFrame,
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nsReflowPath* aReflowPath,
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|
nsIRenderingContext* aRenderingContext,
|
|
const nsSize& aAvailableSpace)
|
|
: mReflowDepth(0)
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|
{
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NS_PRECONDITION(nsnull != aRenderingContext, "no rendering context");
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|
|
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reason = eReflowReason_Incremental;
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path = aReflowPath;
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|
parentReflowState = nsnull;
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frame = aFrame;
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|
availableWidth = aAvailableSpace.width;
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|
availableHeight = aAvailableSpace.height;
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rendContext = aRenderingContext;
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|
mSpaceManager = nsnull;
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|
mLineLayout = nsnull;
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mFlags.mSpecialHeightReflow = PR_FALSE;
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|
mFlags.mIsTopOfPage = PR_FALSE;
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|
mFlags.mUnused = 0;
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|
mPercentHeightObserver = nsnull;
|
|
mPercentHeightReflowInitiator = nsnull;
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|
Init(aPresContext);
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#ifdef IBMBIDI
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mFlags.mVisualBidiFormControl = IsBidiFormControl(aPresContext);
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mRightEdge = NS_UNCONSTRAINEDSIZE;
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#endif // IBMBIDI
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|
}
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|
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// Initialize a reflow state for a child frames reflow. Some state
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// is copied from the parent reflow state; the remaining state is
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// computed.
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|
nsHTMLReflowState::nsHTMLReflowState(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aParentReflowState,
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nsIFrame* aFrame,
|
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const nsSize& aAvailableSpace,
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nsReflowReason aReason,
|
|
PRBool aInit)
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|
: mReflowDepth(aParentReflowState.mReflowDepth + 1),
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|
mFlags(aParentReflowState.mFlags)
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|
{
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|
parentReflowState = &aParentReflowState;
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|
frame = aFrame;
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|
reason = aReason;
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|
if (reason == eReflowReason_Incremental) {
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// If the child frame isn't along the reflow path, then convert
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|
// the incremental reflow to a dirty reflow.
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path = aParentReflowState.path->GetSubtreeFor(aFrame);
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if (! path)
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reason = eReflowReason_Dirty;
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}
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else
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path = nsnull;
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availableWidth = aAvailableSpace.width;
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availableHeight = aAvailableSpace.height;
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rendContext = aParentReflowState.rendContext;
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mSpaceManager = aParentReflowState.mSpaceManager;
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mLineLayout = aParentReflowState.mLineLayout;
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mFlags.mIsTopOfPage = aParentReflowState.mFlags.mIsTopOfPage;
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mPercentHeightObserver = (aParentReflowState.mPercentHeightObserver &&
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aParentReflowState.mPercentHeightObserver->NeedsToObserve(*this))
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? aParentReflowState.mPercentHeightObserver : nsnull;
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mPercentHeightReflowInitiator = aParentReflowState.mPercentHeightReflowInitiator;
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|
|
|
if (aInit) {
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Init(aPresContext);
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}
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|
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#ifdef IBMBIDI
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mFlags.mVisualBidiFormControl = (aParentReflowState.mFlags.mVisualBidiFormControl) ?
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PR_TRUE : IsBidiFormControl(aPresContext);
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mRightEdge = aParentReflowState.mRightEdge;
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#endif // IBMBIDI
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}
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|
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// Same as the previous except that the reason is taken from the
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// parent's reflow state.
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nsHTMLReflowState::nsHTMLReflowState(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aParentReflowState,
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nsIFrame* aFrame,
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const nsSize& aAvailableSpace)
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|
: mReflowDepth(aParentReflowState.mReflowDepth + 1),
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|
mFlags(aParentReflowState.mFlags)
|
|
{
|
|
parentReflowState = &aParentReflowState;
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frame = aFrame;
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|
reason = aParentReflowState.reason;
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|
if (reason == eReflowReason_Incremental) {
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// If the child frame isn't along the reflow path, then convert
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// the incremental reflow to a dirty reflow.
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path = aParentReflowState.path->GetSubtreeFor(aFrame);
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if (! path)
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reason = eReflowReason_Dirty;
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|
}
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else
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path = nsnull;
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availableWidth = aAvailableSpace.width;
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availableHeight = aAvailableSpace.height;
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|
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rendContext = aParentReflowState.rendContext;
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mSpaceManager = aParentReflowState.mSpaceManager;
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mLineLayout = aParentReflowState.mLineLayout;
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mFlags.mIsTopOfPage = aParentReflowState.mFlags.mIsTopOfPage;
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|
mPercentHeightObserver = (aParentReflowState.mPercentHeightObserver &&
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|
aParentReflowState.mPercentHeightObserver->NeedsToObserve(*this))
|
|
? aParentReflowState.mPercentHeightObserver : nsnull;
|
|
mPercentHeightReflowInitiator = aParentReflowState.mPercentHeightReflowInitiator;
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|
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Init(aPresContext);
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|
|
#ifdef IBMBIDI
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|
mFlags.mVisualBidiFormControl = (aParentReflowState.mFlags.mVisualBidiFormControl) ?
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PR_TRUE : IsBidiFormControl(aPresContext);
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mRightEdge = aParentReflowState.mRightEdge;
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#endif // IBMBIDI
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|
}
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|
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// Version that species the containing block width and height
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nsHTMLReflowState::nsHTMLReflowState(nsIPresContext* aPresContext,
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|
const nsHTMLReflowState& aParentReflowState,
|
|
nsIFrame* aFrame,
|
|
const nsSize& aAvailableSpace,
|
|
nscoord aContainingBlockWidth,
|
|
nscoord aContainingBlockHeight,
|
|
nsReflowReason aReason)
|
|
: mReflowDepth(aParentReflowState.mReflowDepth + 1),
|
|
mFlags(aParentReflowState.mFlags)
|
|
{
|
|
parentReflowState = &aParentReflowState;
|
|
frame = aFrame;
|
|
reason = aReason;
|
|
if (reason == eReflowReason_Incremental) {
|
|
// If the child frame isn't along the reflow path, then convert
|
|
// the incremental reflow to a dirty reflow.
|
|
path = aParentReflowState.path->GetSubtreeFor(aFrame);
|
|
if (! path)
|
|
reason = eReflowReason_Dirty;
|
|
}
|
|
else
|
|
path = nsnull;
|
|
|
|
availableWidth = aAvailableSpace.width;
|
|
availableHeight = aAvailableSpace.height;
|
|
|
|
rendContext = aParentReflowState.rendContext;
|
|
mSpaceManager = aParentReflowState.mSpaceManager;
|
|
mLineLayout = aParentReflowState.mLineLayout;
|
|
mFlags.mIsTopOfPage = aParentReflowState.mFlags.mIsTopOfPage;
|
|
mPercentHeightObserver = (aParentReflowState.mPercentHeightObserver &&
|
|
aParentReflowState.mPercentHeightObserver->NeedsToObserve(*this))
|
|
? aParentReflowState.mPercentHeightObserver : nsnull;
|
|
mPercentHeightReflowInitiator = aParentReflowState.mPercentHeightReflowInitiator;
|
|
|
|
Init(aPresContext, aContainingBlockWidth, aContainingBlockHeight);
|
|
|
|
#ifdef IBMBIDI
|
|
mFlags.mVisualBidiFormControl = (aParentReflowState.mFlags.mVisualBidiFormControl) ?
|
|
PR_TRUE : IsBidiFormControl(aPresContext);
|
|
mRightEdge = aParentReflowState.mRightEdge;
|
|
#endif // IBMBIDI
|
|
}
|
|
|
|
void
|
|
nsHTMLReflowState::Init(nsIPresContext* aPresContext,
|
|
nscoord aContainingBlockWidth,
|
|
nscoord aContainingBlockHeight,
|
|
nsMargin* aBorder,
|
|
nsMargin* aPadding)
|
|
{
|
|
mCompactMarginWidth = 0;
|
|
#ifdef DEBUG
|
|
mDebugHook = nsnull;
|
|
#endif
|
|
|
|
mStylePosition = frame->GetStylePosition();
|
|
mStyleDisplay = frame->GetStyleDisplay();
|
|
mStyleVisibility = frame->GetStyleVisibility();
|
|
mStyleBorder = frame->GetStyleBorder();
|
|
mStyleMargin = frame->GetStyleMargin();
|
|
mStylePadding = frame->GetStylePadding();
|
|
mStyleText = frame->GetStyleText();
|
|
|
|
InitFrameType();
|
|
InitCBReflowState();
|
|
InitConstraints(aPresContext, aContainingBlockWidth, aContainingBlockHeight, aBorder, aPadding);
|
|
}
|
|
|
|
void nsHTMLReflowState::InitCBReflowState()
|
|
{
|
|
if (!parentReflowState) {
|
|
mCBReflowState = nsnull;
|
|
return;
|
|
}
|
|
|
|
if (parentReflowState->frame->IsContainingBlock() ||
|
|
// Absolutely positioned frames should always be kids of the frames that
|
|
// determine their containing block
|
|
(NS_FRAME_GET_TYPE(mFrameType) == NS_CSS_FRAME_TYPE_ABSOLUTE)) {
|
|
// a block inside a table cell needs to use the table cell
|
|
if (parentReflowState->parentReflowState &&
|
|
IS_TABLE_CELL(parentReflowState->parentReflowState->frame->GetType())) {
|
|
mCBReflowState = parentReflowState->parentReflowState;
|
|
} else {
|
|
mCBReflowState = parentReflowState;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
mCBReflowState = parentReflowState->mCBReflowState;
|
|
}
|
|
|
|
const nsHTMLReflowState*
|
|
nsHTMLReflowState::GetPageBoxReflowState(const nsHTMLReflowState* aParentRS)
|
|
{
|
|
// XXX write me as soon as we can ask a frame if it's a page frame...
|
|
return nsnull;
|
|
}
|
|
|
|
nscoord
|
|
nsHTMLReflowState::GetContainingBlockContentWidth(const nsHTMLReflowState* aReflowState)
|
|
{
|
|
const nsHTMLReflowState* rs = aReflowState->mCBReflowState;
|
|
if (!rs)
|
|
return 0;
|
|
return rs->mComputedWidth;
|
|
}
|
|
|
|
void
|
|
nsHTMLReflowState::InitFrameType()
|
|
{
|
|
const nsStyleDisplay *disp = mStyleDisplay;
|
|
nsCSSFrameType frameType;
|
|
|
|
// Section 9.7 of the CSS2 spec indicates that absolute position
|
|
// takes precedence over float which takes precedence over display.
|
|
// Make sure the frame was actually moved out of the flow, and don't
|
|
// just assume what the style says
|
|
// XXXldb nsRuleNode::ComputeDisplayData should take care of this, right?
|
|
if (frame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
|
|
if (disp->IsAbsolutelyPositioned()) {
|
|
frameType = NS_CSS_FRAME_TYPE_ABSOLUTE;
|
|
}
|
|
else {
|
|
NS_ASSERTION(NS_STYLE_FLOAT_NONE != disp->mFloats,
|
|
"unknown out of flow frame type");
|
|
frameType = NS_CSS_FRAME_TYPE_FLOATING;
|
|
}
|
|
}
|
|
else {
|
|
switch (disp->mDisplay) {
|
|
case NS_STYLE_DISPLAY_BLOCK:
|
|
case NS_STYLE_DISPLAY_LIST_ITEM:
|
|
case NS_STYLE_DISPLAY_TABLE:
|
|
case NS_STYLE_DISPLAY_TABLE_CAPTION:
|
|
frameType = NS_CSS_FRAME_TYPE_BLOCK;
|
|
break;
|
|
|
|
case NS_STYLE_DISPLAY_INLINE:
|
|
case NS_STYLE_DISPLAY_MARKER:
|
|
case NS_STYLE_DISPLAY_INLINE_TABLE:
|
|
case NS_STYLE_DISPLAY_INLINE_BOX:
|
|
case NS_STYLE_DISPLAY_INLINE_GRID:
|
|
case NS_STYLE_DISPLAY_INLINE_STACK:
|
|
frameType = NS_CSS_FRAME_TYPE_INLINE;
|
|
break;
|
|
|
|
case NS_STYLE_DISPLAY_RUN_IN:
|
|
case NS_STYLE_DISPLAY_COMPACT:
|
|
// XXX need to look ahead at the frame's sibling
|
|
frameType = NS_CSS_FRAME_TYPE_BLOCK;
|
|
break;
|
|
|
|
case NS_STYLE_DISPLAY_TABLE_CELL:
|
|
case NS_STYLE_DISPLAY_TABLE_ROW_GROUP:
|
|
case NS_STYLE_DISPLAY_TABLE_COLUMN:
|
|
case NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP:
|
|
case NS_STYLE_DISPLAY_TABLE_HEADER_GROUP:
|
|
case NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP:
|
|
case NS_STYLE_DISPLAY_TABLE_ROW:
|
|
frameType = NS_CSS_FRAME_TYPE_INTERNAL_TABLE;
|
|
break;
|
|
|
|
case NS_STYLE_DISPLAY_NONE:
|
|
default:
|
|
frameType = NS_CSS_FRAME_TYPE_UNKNOWN;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// See if the frame is replaced
|
|
if (frame->GetStateBits() & NS_FRAME_REPLACED_ELEMENT) {
|
|
frameType = NS_FRAME_REPLACED(frameType);
|
|
}
|
|
|
|
mFrameType = frameType;
|
|
}
|
|
|
|
void
|
|
nsHTMLReflowState::ComputeRelativeOffsets(const nsHTMLReflowState* cbrs,
|
|
nscoord aContainingBlockWidth,
|
|
nscoord aContainingBlockHeight)
|
|
{
|
|
nsStyleCoord coord;
|
|
|
|
// Compute the 'left' and 'right' values. 'Left' moves the boxes to the right,
|
|
// and 'right' moves the boxes to the left. The computed values are always:
|
|
// left=-right
|
|
PRBool leftIsAuto = eStyleUnit_Auto == mStylePosition->mOffset.GetLeftUnit();
|
|
PRBool rightIsAuto = eStyleUnit_Auto == mStylePosition->mOffset.GetRightUnit();
|
|
|
|
// Check for percentage based values and an unconstrained containing
|
|
// block width. Treat them like 'auto'
|
|
if (NS_UNCONSTRAINEDSIZE == aContainingBlockWidth) {
|
|
if (eStyleUnit_Percent == mStylePosition->mOffset.GetLeftUnit()) {
|
|
leftIsAuto = PR_TRUE;
|
|
}
|
|
if (eStyleUnit_Percent == mStylePosition->mOffset.GetRightUnit()) {
|
|
rightIsAuto = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
// If neither 'left' not 'right' are auto, then we're over-constrained and
|
|
// we ignore one of them
|
|
if (!leftIsAuto && !rightIsAuto) {
|
|
const nsStyleVisibility* vis = frame->GetStyleVisibility();
|
|
|
|
if (NS_STYLE_DIRECTION_LTR == vis->mDirection) {
|
|
rightIsAuto = PR_TRUE;
|
|
} else {
|
|
leftIsAuto = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
if (leftIsAuto) {
|
|
if (rightIsAuto) {
|
|
// If both are 'auto' (their initial values), the computed values are 0
|
|
mComputedOffsets.left = mComputedOffsets.right = 0;
|
|
} else {
|
|
// 'Right' isn't 'auto' so compute its value
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStylePosition->mOffset.GetRightUnit(),
|
|
mStylePosition->mOffset.GetRight(coord),
|
|
mComputedOffsets.right);
|
|
|
|
// Computed value for 'left' is minus the value of 'right'
|
|
mComputedOffsets.left = -mComputedOffsets.right;
|
|
}
|
|
|
|
} else {
|
|
NS_ASSERTION(rightIsAuto, "unexpected specified constraint");
|
|
|
|
// 'Left' isn't 'auto' so compute its value
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStylePosition->mOffset.GetLeftUnit(),
|
|
mStylePosition->mOffset.GetLeft(coord),
|
|
mComputedOffsets.left);
|
|
|
|
// Computed value for 'right' is minus the value of 'left'
|
|
mComputedOffsets.right = -mComputedOffsets.left;
|
|
}
|
|
|
|
// Compute the 'top' and 'bottom' values. The 'top' and 'bottom' properties
|
|
// move relatively positioned elements up and down. They also must be each
|
|
// other's negative
|
|
PRBool topIsAuto = eStyleUnit_Auto == mStylePosition->mOffset.GetTopUnit();
|
|
PRBool bottomIsAuto = eStyleUnit_Auto == mStylePosition->mOffset.GetBottomUnit();
|
|
|
|
// Check for percentage based values and a containing block height that
|
|
// depends on the content height. Treat them like 'auto'
|
|
if (NS_AUTOHEIGHT == aContainingBlockHeight) {
|
|
if (eStyleUnit_Percent == mStylePosition->mOffset.GetTopUnit()) {
|
|
topIsAuto = PR_TRUE;
|
|
}
|
|
if (eStyleUnit_Percent == mStylePosition->mOffset.GetBottomUnit()) {
|
|
bottomIsAuto = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
// If neither is 'auto', 'bottom' is ignored
|
|
if (!topIsAuto && !bottomIsAuto) {
|
|
bottomIsAuto = PR_TRUE;
|
|
}
|
|
|
|
if (topIsAuto) {
|
|
if (bottomIsAuto) {
|
|
// If both are 'auto' (their initial values), the computed values are 0
|
|
mComputedOffsets.top = mComputedOffsets.bottom = 0;
|
|
} else {
|
|
// 'Bottom' isn't 'auto' so compute its value
|
|
ComputeVerticalValue(aContainingBlockHeight,
|
|
mStylePosition->mOffset.GetBottomUnit(),
|
|
mStylePosition->mOffset.GetBottom(coord),
|
|
mComputedOffsets.bottom);
|
|
|
|
// Computed value for 'top' is minus the value of 'bottom'
|
|
mComputedOffsets.top = -mComputedOffsets.bottom;
|
|
}
|
|
|
|
} else {
|
|
NS_ASSERTION(bottomIsAuto, "unexpected specified constraint");
|
|
|
|
// 'Top' isn't 'auto' so compute its value
|
|
ComputeVerticalValue(aContainingBlockHeight,
|
|
mStylePosition->mOffset.GetTopUnit(),
|
|
mStylePosition->mOffset.GetTop(coord),
|
|
mComputedOffsets.top);
|
|
|
|
// Computed value for 'bottom' is minus the value of 'top'
|
|
mComputedOffsets.bottom = -mComputedOffsets.top;
|
|
}
|
|
}
|
|
|
|
// Returns the nearest containing block frame for the specified frame.
|
|
// Also returns the left, top, right, and bottom edges of the specified
|
|
// frame's content area. These are in the coordinate space of the block
|
|
// frame itself
|
|
static nsIFrame*
|
|
GetNearestContainingBlock(nsIFrame* aFrame, nsMargin& aContentArea)
|
|
{
|
|
aFrame = aFrame->GetParent();
|
|
while (aFrame) {
|
|
nsIAtom* frameType = aFrame->GetType();
|
|
PRBool isBlock =
|
|
(frameType == nsLayoutAtoms::blockFrame) ||
|
|
(frameType == nsLayoutAtoms::areaFrame);
|
|
|
|
if (isBlock) {
|
|
break;
|
|
}
|
|
aFrame = aFrame->GetParent();
|
|
}
|
|
|
|
if (aFrame) {
|
|
nsSize size = aFrame->GetSize();
|
|
|
|
aContentArea.left = 0;
|
|
aContentArea.top = 0;
|
|
aContentArea.right = size.width;
|
|
aContentArea.bottom = size.height;
|
|
|
|
// Subtract off for border and padding. If it can't be computed because
|
|
// it's percentage based (for example) then just ignore it
|
|
nsStyleBorderPadding bPad;
|
|
nsMargin borderPadding;
|
|
nsStyleContext* styleContext = aFrame->GetStyleContext();
|
|
styleContext->GetBorderPaddingFor(bPad);
|
|
if (bPad.GetBorderPadding(borderPadding)) {
|
|
aContentArea.left += borderPadding.left;
|
|
aContentArea.top += borderPadding.top;
|
|
aContentArea.right -= borderPadding.right;
|
|
aContentArea.bottom -= borderPadding.bottom;
|
|
}
|
|
}
|
|
|
|
return aFrame;
|
|
}
|
|
|
|
// When determining the hypothetical box that would have been if the element
|
|
// had been in the flow we may not be able to exactly determine both the left
|
|
// and right edges. For example, if the element is a non-replaced inline-level
|
|
// element we would have to reflow it in order to determine it desired width.
|
|
// In that case depending on the progression direction either the left or
|
|
// right edge would be marked as not being exact
|
|
struct nsHypotheticalBox {
|
|
nscoord mLeft, mRight;
|
|
nscoord mTop;
|
|
PRPackedBool mLeftIsExact, mRightIsExact;
|
|
|
|
nsHypotheticalBox() {
|
|
mLeftIsExact = mRightIsExact = PR_FALSE;
|
|
}
|
|
};
|
|
|
|
static PRBool
|
|
GetIntrinsicSizeFor(nsIFrame* aFrame, nsSize& aIntrinsicSize)
|
|
{
|
|
// See if it is an image frame
|
|
PRBool result = PR_FALSE;
|
|
|
|
// Currently the only type of replaced frame that we can get the intrinsic
|
|
// size for is an image frame
|
|
// XXX We should add back the GetReflowMetrics() function and one of the
|
|
// things should be the intrinsic size...
|
|
if (aFrame->GetType() == nsLayoutAtoms::imageFrame) {
|
|
nsImageFrame* imageFrame = (nsImageFrame*)aFrame;
|
|
|
|
imageFrame->GetIntrinsicImageSize(aIntrinsicSize);
|
|
result = (aIntrinsicSize != nsSize(0, 0));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
nscoord
|
|
nsHTMLReflowState::CalculateHorizBorderPaddingMargin(nscoord aContainingBlockWidth)
|
|
{
|
|
nsMargin border, padding, margin;
|
|
|
|
// Get the border
|
|
if (!mStyleBorder->GetBorder(border)) {
|
|
// CSS2 has no percentage borders
|
|
border.SizeTo(0, 0, 0, 0);
|
|
}
|
|
|
|
// See if the style system can provide us the padding directly
|
|
if (!mStylePadding->GetPadding(padding)) {
|
|
nsStyleCoord left, right;
|
|
|
|
// We have to compute the left and right values
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStylePadding->mPadding.GetLeftUnit(),
|
|
mStylePadding->mPadding.GetLeft(left),
|
|
padding.left);
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStylePadding->mPadding.GetRightUnit(),
|
|
mStylePadding->mPadding.GetRight(right),
|
|
padding.right);
|
|
}
|
|
|
|
// See if the style system can provide us the margin directly
|
|
if (!mStyleMargin->GetMargin(margin)) {
|
|
nsStyleCoord left, right;
|
|
|
|
// We have to compute the left and right values
|
|
if (eStyleUnit_Auto == mStyleMargin->mMargin.GetLeftUnit()) {
|
|
margin.left = 0; // just ignore
|
|
} else {
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStyleMargin->mMargin.GetLeftUnit(),
|
|
mStyleMargin->mMargin.GetLeft(left),
|
|
margin.left);
|
|
}
|
|
if (eStyleUnit_Auto == mStyleMargin->mMargin.GetRightUnit()) {
|
|
margin.right = 0; // just ignore
|
|
} else {
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStyleMargin->mMargin.GetRightUnit(),
|
|
mStyleMargin->mMargin.GetRight(right),
|
|
margin.right);
|
|
}
|
|
}
|
|
|
|
return padding.left + padding.right + border.left + border.right +
|
|
margin.left + margin.right;
|
|
}
|
|
|
|
static void
|
|
GetPlaceholderOffset(nsIFrame* aPlaceholderFrame,
|
|
nsIFrame* aBlockFrame,
|
|
nsPoint& aOffset)
|
|
{
|
|
aOffset = aPlaceholderFrame->GetPosition();
|
|
|
|
// Convert the placeholder position to the coordinate space of the block
|
|
// frame that contains it
|
|
nsIFrame* parent = aPlaceholderFrame->GetParent();
|
|
while (parent && (parent != aBlockFrame)) {
|
|
aOffset += parent->GetPosition();
|
|
parent = parent->GetParent();
|
|
}
|
|
}
|
|
|
|
static nsIFrame*
|
|
FindImmediateChildOf(nsIFrame* aParent, nsIFrame* aDescendantFrame)
|
|
{
|
|
nsIFrame* result = aDescendantFrame;
|
|
|
|
while (result) {
|
|
nsIFrame* parent = result->GetParent();
|
|
if (parent == aParent) {
|
|
break;
|
|
}
|
|
|
|
// The frame is not an immediate child of aParent so walk up another level
|
|
result = parent;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
// Calculate the hypothetical box that the element would have if it were in
|
|
// the flow. The values returned are relative to the padding edge of the
|
|
// absolute containing block
|
|
void
|
|
nsHTMLReflowState::CalculateHypotheticalBox(nsIPresContext* aPresContext,
|
|
nsIFrame* aPlaceholderFrame,
|
|
nsIFrame* aBlockFrame,
|
|
nsMargin& aBlockContentArea,
|
|
const nsHTMLReflowState* cbrs,
|
|
nsHypotheticalBox& aHypotheticalBox)
|
|
{
|
|
NS_ASSERTION(mStyleDisplay->mOriginalDisplay != NS_STYLE_DISPLAY_NONE,
|
|
"mOriginalDisplay has not been properly initialized");
|
|
|
|
// If it's a replaced element and it has a 'auto' value for 'width', see if we
|
|
// can get the intrinsic size. This will allow us to exactly determine both the
|
|
// left and right edges
|
|
nsStyleUnit widthUnit = mStylePosition->mWidth.GetUnit();
|
|
nsSize intrinsicSize;
|
|
PRBool knowIntrinsicSize = PR_FALSE;
|
|
if (NS_FRAME_IS_REPLACED(mFrameType) && (eStyleUnit_Auto == widthUnit)) {
|
|
// See if we can get the intrinsic size of the element
|
|
knowIntrinsicSize = GetIntrinsicSizeFor(frame, intrinsicSize);
|
|
}
|
|
|
|
// See if we can calculate what the box width would have been if the
|
|
// element had been in the flow
|
|
nscoord boxWidth;
|
|
PRBool knowBoxWidth = PR_FALSE;
|
|
if ((NS_STYLE_DISPLAY_INLINE == mStyleDisplay->mOriginalDisplay) &&
|
|
!NS_FRAME_IS_REPLACED(mFrameType)) {
|
|
// For non-replaced inline-level elements the 'width' property doesn't apply,
|
|
// so we don't know what the width would have been without reflowing it
|
|
|
|
} else {
|
|
// It's either a replaced inline-level element or a block-level element
|
|
nscoord horizBorderPaddingMargin;
|
|
|
|
// Determine the total amount of horizontal border/padding/margin that
|
|
// the element would have had if it had been in the flow. Note that we
|
|
// ignore any 'auto' and 'inherit' values
|
|
horizBorderPaddingMargin = CalculateHorizBorderPaddingMargin(aBlockContentArea.right -
|
|
aBlockContentArea.left);
|
|
|
|
if (NS_FRAME_IS_REPLACED(mFrameType) && (eStyleUnit_Auto == widthUnit)) {
|
|
// It's a replaced element with an 'auto' width so the box width is
|
|
// its intrinsic size plus any border/padding/margin
|
|
if (knowIntrinsicSize) {
|
|
boxWidth = intrinsicSize.width + horizBorderPaddingMargin;
|
|
knowBoxWidth = PR_TRUE;
|
|
}
|
|
|
|
} else if (eStyleUnit_Auto == widthUnit) {
|
|
// The box width is the containing block width
|
|
boxWidth = aBlockContentArea.right - aBlockContentArea.left;
|
|
knowBoxWidth = PR_TRUE;
|
|
|
|
} else {
|
|
// We need to compute it. It's important we do this, because if it's
|
|
// percentage based this computed value may be different from the comnputed
|
|
// value calculated using the absolute containing block width
|
|
ComputeHorizontalValue(aBlockContentArea.right - aBlockContentArea.left,
|
|
widthUnit, mStylePosition->mWidth, boxWidth);
|
|
boxWidth += horizBorderPaddingMargin;
|
|
knowBoxWidth = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
// Get the 'direction' of the block
|
|
const nsStyleVisibility* blockVis = aBlockFrame->GetStyleVisibility();
|
|
|
|
// Get the placeholder x-offset and y-offset in the coordinate
|
|
// space of the block frame that contains it
|
|
// XXXbz the placeholder is not fully reflown yet if our containing block is
|
|
// relatively positioned...
|
|
nsPoint placeholderOffset;
|
|
GetPlaceholderOffset(aPlaceholderFrame, aBlockFrame, placeholderOffset);
|
|
|
|
// First, determine the hypothetical box's mTop
|
|
if (aBlockFrame) {
|
|
// We need the immediate child of the block frame, and that may not be
|
|
// the placeholder frame
|
|
nsBlockFrame* blockFrame = NS_STATIC_CAST(nsBlockFrame*, aBlockFrame);
|
|
nsIFrame *blockChild = FindImmediateChildOf(aBlockFrame, aPlaceholderFrame);
|
|
nsBlockFrame::line_iterator lineBox = blockFrame->FindLineFor(blockChild);
|
|
|
|
// How we determine the hypothetical box depends on whether the element
|
|
// would have been inline-level or block-level
|
|
if (NS_STYLE_DISPLAY_INLINE == mStyleDisplay->mOriginalDisplay) {
|
|
// Use the top of the inline box which the placeholder lives in as the
|
|
// hypothetical box's top.
|
|
aHypotheticalBox.mTop = lineBox->mBounds.y;
|
|
} else {
|
|
// The element would have been block-level which means it would be below
|
|
// the line containing the placeholder frame, unless all the frames
|
|
// before it are empty. In that case, it would have been just before
|
|
// this line.
|
|
// XXXbz the line box is not fully reflown yet if our containing block is
|
|
// relatively positioned...
|
|
if (lineBox != blockFrame->end_lines()) {
|
|
nsIFrame * firstFrame = lineBox->mFirstChild;
|
|
while (firstFrame != aPlaceholderFrame) {
|
|
NS_ASSERTION(firstFrame, "Must reach our placeholder before end of list!");
|
|
if (!firstFrame) // This can be removed when we split out-of-flow
|
|
break; // frames correctly, see bug 223064
|
|
if (!firstFrame->IsEmpty()) {
|
|
break;
|
|
}
|
|
|
|
firstFrame = firstFrame->GetNextSibling();
|
|
}
|
|
if (firstFrame == aPlaceholderFrame) {
|
|
// The top of the hypothetical box is the top of the line containing
|
|
// the placeholder, since there is nothing in the line before our
|
|
// placeholder except empty frames.
|
|
aHypotheticalBox.mTop = lineBox->mBounds.y;
|
|
} else {
|
|
// The top of the hypothetical box is just below the line containing
|
|
// the placeholder.
|
|
aHypotheticalBox.mTop = lineBox->mBounds.YMost();
|
|
}
|
|
} else {
|
|
// Just use the placeholder's y-offset
|
|
aHypotheticalBox.mTop = placeholderOffset.y;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Second, determine the hypothetical box's mLeft & mRight
|
|
// To determine the left and right offsets we need to look at the block's 'direction'
|
|
if (NS_STYLE_DIRECTION_LTR == blockVis->mDirection) {
|
|
// How we determine the hypothetical box depends on whether the element
|
|
// would have been inline-level or block-level
|
|
if (NS_STYLE_DISPLAY_INLINE == mStyleDisplay->mOriginalDisplay) {
|
|
// The placeholder represents the left edge of the hypothetical box
|
|
aHypotheticalBox.mLeft = placeholderOffset.x;
|
|
} else {
|
|
aHypotheticalBox.mLeft = aBlockContentArea.left;
|
|
}
|
|
aHypotheticalBox.mLeftIsExact = PR_TRUE;
|
|
|
|
if (knowBoxWidth) {
|
|
aHypotheticalBox.mRight = aHypotheticalBox.mLeft + boxWidth;
|
|
aHypotheticalBox.mRightIsExact = PR_TRUE;
|
|
} else {
|
|
// We can't compute the right edge because we don't know the desired
|
|
// width. So instead use the right content edge of the block parent,
|
|
// but remember it's not exact
|
|
aHypotheticalBox.mRight = aBlockContentArea.right;
|
|
aHypotheticalBox.mRightIsExact = PR_FALSE;
|
|
}
|
|
|
|
} else {
|
|
// The placeholder represents the right edge of the hypothetical box
|
|
if (NS_STYLE_DISPLAY_INLINE == mStyleDisplay->mOriginalDisplay) {
|
|
aHypotheticalBox.mRight = placeholderOffset.x;
|
|
} else {
|
|
aHypotheticalBox.mRight = aBlockContentArea.right;
|
|
}
|
|
aHypotheticalBox.mRightIsExact = PR_TRUE;
|
|
|
|
if (knowBoxWidth) {
|
|
aHypotheticalBox.mLeft = aHypotheticalBox.mRight - boxWidth;
|
|
aHypotheticalBox.mLeftIsExact = PR_TRUE;
|
|
} else {
|
|
// We can't compute the left edge because we don't know the desired
|
|
// width. So instead use the left content edge of the block parent,
|
|
// but remember it's not exact
|
|
aHypotheticalBox.mLeft = aBlockContentArea.left;
|
|
aHypotheticalBox.mLeftIsExact = PR_FALSE;
|
|
}
|
|
|
|
}
|
|
|
|
// The current coordinate space is that of the nearest block to the placeholder.
|
|
// Convert to the coordinate space of the absolute containing block
|
|
nsIFrame* absoluteContainingBlock = cbrs->frame;
|
|
if (aBlockFrame != absoluteContainingBlock) {
|
|
nsIFrame* parent;
|
|
nsIFrame* stop;
|
|
if (NS_FRAME_GET_TYPE(cbrs->mFrameType) == NS_CSS_FRAME_TYPE_INLINE) {
|
|
// The absolute containing block is an inline frame... so it will be a
|
|
// descendant of aBlockFrame
|
|
parent = absoluteContainingBlock;
|
|
stop = aBlockFrame;
|
|
} else {
|
|
// aBlockFrame may be a descendant of absoluteContainingBlock
|
|
parent = aBlockFrame;
|
|
stop = absoluteContainingBlock;
|
|
}
|
|
do {
|
|
nsPoint origin = parent->GetPosition();
|
|
|
|
aHypotheticalBox.mLeft += origin.x;
|
|
aHypotheticalBox.mRight += origin.x;
|
|
aHypotheticalBox.mTop += origin.y;
|
|
|
|
// Move up the tree one level
|
|
parent = parent->GetParent();
|
|
} while (parent && parent != stop);
|
|
}
|
|
|
|
// The specified offsets are relative to the absolute containing block's
|
|
// padding edge or content edge, and our current values are relative to the
|
|
// border edge, so translate.
|
|
if (NS_FRAME_GET_TYPE(cbrs->mFrameType) == NS_CSS_FRAME_TYPE_INLINE) {
|
|
// content edge
|
|
const nsMargin& borderPadding = cbrs->mComputedBorderPadding;
|
|
aHypotheticalBox.mLeft -= borderPadding.left;
|
|
aHypotheticalBox.mRight -= borderPadding.right;
|
|
aHypotheticalBox.mTop -= borderPadding.top;
|
|
} else {
|
|
// padding edge
|
|
nsMargin border = cbrs->mComputedBorderPadding - cbrs->mComputedPadding;
|
|
aHypotheticalBox.mLeft -= border.left;
|
|
aHypotheticalBox.mRight -= border.right;
|
|
aHypotheticalBox.mTop -= border.top;
|
|
}
|
|
}
|
|
|
|
void
|
|
nsHTMLReflowState::InitAbsoluteConstraints(nsIPresContext* aPresContext,
|
|
const nsHTMLReflowState* cbrs,
|
|
nscoord containingBlockWidth,
|
|
nscoord containingBlockHeight)
|
|
{
|
|
NS_PRECONDITION(containingBlockHeight != NS_AUTOHEIGHT,
|
|
"containing block height must be constrained");
|
|
|
|
// Get the placeholder frame
|
|
nsIFrame* placeholderFrame;
|
|
|
|
aPresContext->PresShell()->GetPlaceholderFrameFor(frame, &placeholderFrame);
|
|
NS_ASSERTION(nsnull != placeholderFrame, "no placeholder frame");
|
|
|
|
// Find the nearest containing block frame to the placeholder frame,
|
|
// and return its content area left, top, right, and bottom edges
|
|
nsMargin blockContentArea;
|
|
nsIFrame* blockFrame = GetNearestContainingBlock(placeholderFrame,
|
|
blockContentArea);
|
|
|
|
// If both 'left' and 'right' are 'auto' or both 'top' and 'bottom' are
|
|
// 'auto', then compute the hypothetical box of where the element would
|
|
// have been if it had been in the flow
|
|
nsHypotheticalBox hypotheticalBox;
|
|
if (((eStyleUnit_Auto == mStylePosition->mOffset.GetLeftUnit()) &&
|
|
(eStyleUnit_Auto == mStylePosition->mOffset.GetRightUnit())) ||
|
|
((eStyleUnit_Auto == mStylePosition->mOffset.GetTopUnit()) &&
|
|
(eStyleUnit_Auto == mStylePosition->mOffset.GetBottomUnit()))) {
|
|
|
|
CalculateHypotheticalBox(aPresContext, placeholderFrame, blockFrame,
|
|
blockContentArea, cbrs, hypotheticalBox);
|
|
}
|
|
|
|
// Initialize the 'left' and 'right' computed offsets
|
|
// XXX Handle new 'static-position' value...
|
|
PRBool leftIsAuto = PR_FALSE, rightIsAuto = PR_FALSE;
|
|
nsStyleCoord coord;
|
|
if (eStyleUnit_Auto == mStylePosition->mOffset.GetLeftUnit()) {
|
|
mComputedOffsets.left = 0;
|
|
leftIsAuto = PR_TRUE;
|
|
} else {
|
|
ComputeHorizontalValue(containingBlockWidth, mStylePosition->mOffset.GetLeftUnit(),
|
|
mStylePosition->mOffset.GetLeft(coord),
|
|
mComputedOffsets.left);
|
|
}
|
|
if (eStyleUnit_Auto == mStylePosition->mOffset.GetRightUnit()) {
|
|
mComputedOffsets.right = 0;
|
|
rightIsAuto = PR_TRUE;
|
|
} else {
|
|
ComputeHorizontalValue(containingBlockWidth, mStylePosition->mOffset.GetRightUnit(),
|
|
mStylePosition->mOffset.GetRight(coord),
|
|
mComputedOffsets.right);
|
|
}
|
|
|
|
// When the CSS2 spec refers to direction it means the containing block's
|
|
// direction and not the direction of the absolutely positioned element itself
|
|
PRUint8 direction = cbrs->mStyleVisibility->mDirection;
|
|
|
|
// Initialize the 'width' computed value
|
|
nsStyleUnit widthUnit = mStylePosition->mWidth.GetUnit();
|
|
PRBool widthIsAuto = (eStyleUnit_Auto == widthUnit);
|
|
if (!widthIsAuto) {
|
|
// Use the specified value for the computed width
|
|
ComputeHorizontalValue(containingBlockWidth, widthUnit,
|
|
mStylePosition->mWidth, mComputedWidth);
|
|
|
|
AdjustComputedWidth(PR_TRUE);
|
|
}
|
|
|
|
// See if none of 'left', 'width', and 'right', is 'auto'
|
|
if (!leftIsAuto && !widthIsAuto && !rightIsAuto) {
|
|
// See whether we're over-constrained
|
|
PRInt32 availBoxSpace = containingBlockWidth - mComputedOffsets.left - mComputedOffsets.right;
|
|
PRInt32 availContentSpace = availBoxSpace - mComputedBorderPadding.left -
|
|
mComputedBorderPadding.right;
|
|
|
|
if (availContentSpace < mComputedWidth) {
|
|
// We're over-constrained so use 'direction' to dictate which value to
|
|
// ignore
|
|
if (NS_STYLE_DIRECTION_LTR == direction) {
|
|
// Ignore the specified value for 'right'
|
|
mComputedOffsets.right = containingBlockWidth - mComputedOffsets.left -
|
|
mComputedBorderPadding.left - mComputedWidth - mComputedBorderPadding.right;
|
|
} else {
|
|
// Ignore the specified value for 'left'
|
|
mComputedOffsets.left = containingBlockWidth - mComputedBorderPadding.left -
|
|
mComputedWidth - mComputedBorderPadding.right - mComputedOffsets.right;
|
|
}
|
|
|
|
} else {
|
|
// Calculate any 'auto' margin values
|
|
PRBool marginLeftIsAuto = (eStyleUnit_Auto == mStyleMargin->mMargin.GetLeftUnit());
|
|
PRBool marginRightIsAuto = (eStyleUnit_Auto == mStyleMargin->mMargin.GetRightUnit());
|
|
PRInt32 availMarginSpace = availContentSpace - mComputedWidth;
|
|
|
|
if (marginLeftIsAuto) {
|
|
if (marginRightIsAuto) {
|
|
// Both 'margin-left' and 'margin-right' are 'auto', so they get
|
|
// equal values
|
|
mComputedMargin.left = availMarginSpace / 2;
|
|
mComputedMargin.right = availMarginSpace - mComputedMargin.left;
|
|
} else {
|
|
// Just 'margin-left' is 'auto'
|
|
mComputedMargin.left = availMarginSpace - mComputedMargin.right;
|
|
}
|
|
} else {
|
|
// Just 'margin-right' is 'auto'
|
|
mComputedMargin.right = availMarginSpace - mComputedMargin.left;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
// See if all three of 'left', 'width', and 'right', are 'auto'
|
|
if (leftIsAuto && widthIsAuto && rightIsAuto) {
|
|
// Use the 'direction' to dictate whether 'left' or 'right' is
|
|
// treated like 'static-position'
|
|
if (NS_STYLE_DIRECTION_LTR == direction) {
|
|
if (hypotheticalBox.mLeftIsExact) {
|
|
mComputedOffsets.left = hypotheticalBox.mLeft;
|
|
leftIsAuto = PR_FALSE;
|
|
} else {
|
|
// Well, we don't know 'left' so we have to use 'right' and
|
|
// then solve for 'left'
|
|
mComputedOffsets.right = hypotheticalBox.mRight;
|
|
rightIsAuto = PR_FALSE;
|
|
}
|
|
} else {
|
|
if (hypotheticalBox.mRightIsExact) {
|
|
mComputedOffsets.right = containingBlockWidth - hypotheticalBox.mRight;
|
|
rightIsAuto = PR_FALSE;
|
|
} else {
|
|
// Well, we don't know 'right' so we have to use 'left' and
|
|
// then solve for 'right'
|
|
mComputedOffsets.left = hypotheticalBox.mLeft;
|
|
leftIsAuto = PR_FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
// At this point we know that at least one of 'left', 'width', and 'right'
|
|
// is 'auto', but not all three. Examine the various combinations
|
|
if (widthIsAuto) {
|
|
if (leftIsAuto || rightIsAuto) {
|
|
if (NS_FRAME_IS_REPLACED(mFrameType)) {
|
|
// For a replaced element we use the intrinsic size
|
|
mComputedWidth = NS_INTRINSICSIZE;
|
|
} else {
|
|
// The width is shrink-to-fit but constrained by the containing block width
|
|
mComputedWidth = NS_SHRINKWRAPWIDTH;
|
|
|
|
PRInt32 maxWidth = containingBlockWidth;
|
|
if (NS_UNCONSTRAINEDSIZE != maxWidth) {
|
|
maxWidth -= mComputedOffsets.left + mComputedMargin.left + mComputedBorderPadding.left +
|
|
mComputedBorderPadding.right + mComputedMargin.right + mComputedOffsets.right;
|
|
}
|
|
if (maxWidth <= 0) {
|
|
maxWidth = 1;
|
|
}
|
|
if (mComputedMaxWidth > maxWidth) {
|
|
mComputedMaxWidth = maxWidth;
|
|
}
|
|
}
|
|
|
|
if (leftIsAuto) {
|
|
mComputedOffsets.left = NS_AUTOOFFSET; // solve for 'left'
|
|
} else {
|
|
mComputedOffsets.right = NS_AUTOOFFSET; // solve for 'right'
|
|
}
|
|
|
|
} else {
|
|
// Only 'width' is 'auto' so just solve for 'width'
|
|
mComputedWidth = containingBlockWidth - mComputedOffsets.left -
|
|
mComputedMargin.left - mComputedBorderPadding.left -
|
|
mComputedBorderPadding.right -
|
|
mComputedMargin.right - mComputedOffsets.right;
|
|
|
|
mComputedWidth = PR_MAX(mComputedWidth, 0);
|
|
|
|
AdjustComputedWidth(PR_FALSE);
|
|
|
|
// XXX If the direction is rtl then we need to reevaluate left...
|
|
}
|
|
|
|
} else {
|
|
// Either 'left' or 'right' or both is 'auto'
|
|
if (leftIsAuto && rightIsAuto) {
|
|
// Use the 'direction' to dictate whether 'left' or 'right' is treated like
|
|
// 'static-position'
|
|
if (NS_STYLE_DIRECTION_LTR == direction) {
|
|
if (hypotheticalBox.mLeftIsExact) {
|
|
mComputedOffsets.left = hypotheticalBox.mLeft;
|
|
leftIsAuto = PR_FALSE;
|
|
} else {
|
|
// Well, we don't know 'left' so we have to use 'right' and
|
|
// then solve for 'left'
|
|
mComputedOffsets.right = hypotheticalBox.mRight;
|
|
rightIsAuto = PR_FALSE;
|
|
}
|
|
} else {
|
|
if (hypotheticalBox.mRightIsExact) {
|
|
mComputedOffsets.right = containingBlockWidth - hypotheticalBox.mRight;
|
|
rightIsAuto = PR_FALSE;
|
|
} else {
|
|
// Well, we don't know 'right' so we have to use 'left' and
|
|
// then solve for 'right'
|
|
mComputedOffsets.left = hypotheticalBox.mLeft;
|
|
leftIsAuto = PR_FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (leftIsAuto) {
|
|
// Solve for 'left'
|
|
mComputedOffsets.left = containingBlockWidth - mComputedMargin.left -
|
|
mComputedBorderPadding.left - mComputedWidth - mComputedBorderPadding.right -
|
|
mComputedMargin.right - mComputedOffsets.right;
|
|
|
|
} else if (rightIsAuto) {
|
|
// Solve for 'right'
|
|
mComputedOffsets.right = containingBlockWidth - mComputedOffsets.left -
|
|
mComputedMargin.left - mComputedBorderPadding.left - mComputedWidth -
|
|
mComputedBorderPadding.right - mComputedMargin.right;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Initialize the 'top' and 'bottom' computed offsets
|
|
nsStyleUnit heightUnit = mStylePosition->mHeight.GetUnit();
|
|
PRBool topIsAuto = PR_FALSE, bottomIsAuto = PR_FALSE;
|
|
if (eStyleUnit_Auto == mStylePosition->mOffset.GetTopUnit()) {
|
|
mComputedOffsets.top = 0;
|
|
topIsAuto = PR_TRUE;
|
|
} else {
|
|
nsStyleCoord c;
|
|
ComputeVerticalValue(containingBlockHeight,
|
|
mStylePosition->mOffset.GetTopUnit(),
|
|
mStylePosition->mOffset.GetTop(c),
|
|
mComputedOffsets.top);
|
|
}
|
|
if (eStyleUnit_Auto == mStylePosition->mOffset.GetBottomUnit()) {
|
|
mComputedOffsets.bottom = 0;
|
|
bottomIsAuto = PR_TRUE;
|
|
} else {
|
|
nsStyleCoord c;
|
|
ComputeVerticalValue(containingBlockHeight,
|
|
mStylePosition->mOffset.GetBottomUnit(),
|
|
mStylePosition->mOffset.GetBottom(c),
|
|
mComputedOffsets.bottom);
|
|
}
|
|
|
|
// Initialize the 'height' computed value
|
|
PRBool heightIsAuto = (eStyleUnit_Auto == heightUnit);
|
|
if (!heightIsAuto) {
|
|
// Use the specified value for the computed height
|
|
ComputeVerticalValue(containingBlockHeight, heightUnit,
|
|
mStylePosition->mHeight, mComputedHeight);
|
|
|
|
AdjustComputedHeight(PR_TRUE);
|
|
}
|
|
|
|
// See if none of 'top', 'height', and 'bottom', is 'auto'
|
|
if (!topIsAuto && !heightIsAuto && !bottomIsAuto) {
|
|
// See whether we're over-constrained
|
|
PRInt32 availBoxSpace = containingBlockHeight - mComputedOffsets.top - mComputedOffsets.bottom;
|
|
PRInt32 availContentSpace = availBoxSpace - mComputedBorderPadding.top -
|
|
mComputedBorderPadding.bottom;
|
|
|
|
if (availContentSpace < mComputedHeight) {
|
|
// We're over-constrained so ignore the specified value for 'bottom'
|
|
mComputedOffsets.bottom = containingBlockHeight - mComputedOffsets.top -
|
|
mComputedBorderPadding.top - mComputedHeight - mComputedBorderPadding.bottom;
|
|
|
|
} else {
|
|
// Calculate any 'auto' margin values
|
|
PRBool marginTopIsAuto = (eStyleUnit_Auto == mStyleMargin->mMargin.GetTopUnit());
|
|
PRBool marginBottomIsAuto = (eStyleUnit_Auto == mStyleMargin->mMargin.GetBottomUnit());
|
|
PRInt32 availMarginSpace = availContentSpace - mComputedHeight;
|
|
|
|
if (marginTopIsAuto) {
|
|
if (marginBottomIsAuto) {
|
|
// Both 'margin-top' and 'margin-bottom' are 'auto', so they get
|
|
// equal values
|
|
mComputedMargin.top = availMarginSpace / 2;
|
|
mComputedMargin.bottom = availMarginSpace - mComputedMargin.top;
|
|
} else {
|
|
// Just 'margin-top' is 'auto'
|
|
mComputedMargin.top = availMarginSpace - mComputedMargin.bottom;
|
|
}
|
|
} else {
|
|
// Just 'margin-bottom' is 'auto'
|
|
mComputedMargin.bottom = availMarginSpace - mComputedMargin.top;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
// See if all three of 'top', 'height', and 'bottom', are 'auto'
|
|
if (topIsAuto && heightIsAuto && bottomIsAuto) {
|
|
// Treat 'top' like 'static-position'
|
|
mComputedOffsets.top = hypotheticalBox.mTop;
|
|
topIsAuto = PR_FALSE;
|
|
}
|
|
|
|
// At this point we know that at least one of 'top', 'height', and 'bottom'
|
|
// is 'auto', but not all three. Examine the various combinations
|
|
if (heightIsAuto) {
|
|
if (topIsAuto || bottomIsAuto) {
|
|
if (NS_FRAME_IS_REPLACED(mFrameType)) {
|
|
// For a replaced element we use the intrinsic size
|
|
mComputedHeight = NS_INTRINSICSIZE;
|
|
} else {
|
|
// The height is based on the content
|
|
mComputedHeight = NS_AUTOHEIGHT;
|
|
}
|
|
|
|
if (topIsAuto) {
|
|
mComputedOffsets.top = NS_AUTOOFFSET; // solve for 'top'
|
|
} else {
|
|
mComputedOffsets.bottom = NS_AUTOOFFSET; // solve for 'bottom'
|
|
}
|
|
|
|
} else {
|
|
// Only 'height' is 'auto' so just solve for 'height'
|
|
mComputedHeight = containingBlockHeight - mComputedOffsets.top -
|
|
mComputedMargin.top - mComputedBorderPadding.top -
|
|
mComputedBorderPadding.bottom -
|
|
mComputedMargin.bottom - mComputedOffsets.bottom;
|
|
|
|
mComputedHeight = PR_MAX(mComputedHeight, 0);
|
|
|
|
AdjustComputedHeight(PR_FALSE);
|
|
}
|
|
|
|
} else {
|
|
// Either 'top' or 'bottom' or both is 'auto'
|
|
if (topIsAuto && bottomIsAuto) {
|
|
// Treat 'top' like 'static-position'
|
|
mComputedOffsets.top = hypotheticalBox.mTop;
|
|
topIsAuto = PR_FALSE;
|
|
}
|
|
|
|
if (topIsAuto) {
|
|
// Solve for 'top'
|
|
mComputedOffsets.top = containingBlockHeight - mComputedMargin.top -
|
|
mComputedBorderPadding.top - mComputedHeight - mComputedBorderPadding.bottom -
|
|
mComputedMargin.bottom - mComputedOffsets.bottom;
|
|
|
|
} else if (bottomIsAuto) {
|
|
// Solve for 'bottom'
|
|
mComputedOffsets.bottom = containingBlockHeight - mComputedOffsets.top -
|
|
mComputedMargin.top - mComputedBorderPadding.top - mComputedHeight -
|
|
mComputedBorderPadding.bottom - mComputedMargin.bottom;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Now that we've solved for our auto offsets and so forth, we need to adjust
|
|
// the offsets to what the rest of layout actually expects them to be. The
|
|
// offsets as computed now are relative to the parent's padding edge if the
|
|
// parent is a block and the parent's content edge if the parent is an
|
|
// inline. We need them to be relative to the parent's padding edge for
|
|
// nsAbsoluteContainer reflow to work right.
|
|
if (NS_FRAME_GET_TYPE(cbrs->mFrameType) == NS_CSS_FRAME_TYPE_INLINE) {
|
|
mComputedOffsets += cbrs->mComputedPadding;
|
|
}
|
|
}
|
|
|
|
static PRBool
|
|
IsInitialContainingBlock(nsIFrame* aFrame)
|
|
{
|
|
nsIContent* content = aFrame->GetContent();
|
|
|
|
if (content && !content->GetParent()) {
|
|
// The containing block corresponds to the document element so it's
|
|
// the initial containing block
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nscoord
|
|
GetVerticalMarginBorderPadding(const nsHTMLReflowState* aReflowState)
|
|
{
|
|
nscoord result = 0;
|
|
if (!aReflowState) return result;
|
|
|
|
// zero auto margins
|
|
nsMargin margin = aReflowState->mComputedMargin;
|
|
if (NS_AUTOMARGIN == margin.top)
|
|
margin.top = 0;
|
|
if (NS_AUTOMARGIN == margin.bottom)
|
|
margin.bottom = 0;
|
|
|
|
result += margin.top + margin.bottom;
|
|
result += aReflowState->mComputedBorderPadding.top +
|
|
aReflowState->mComputedBorderPadding.bottom;
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Get the height based on the viewport of the containing block specified
|
|
* in aReflowState when the containing block has mComputedHeight == NS_AUTOHEIGHT
|
|
* This will walk up the chain of containing blocks looking for a computed height
|
|
* until it finds the canvas frame, or it encounters a frame that is not a block,
|
|
* area, or scroll frame. This handles compatibility with IE (see bug 85016 and bug 219693)
|
|
*
|
|
* When we encounter scrolledContent area frames, we skip over them, since they are guaranteed to not be useful for computing the containing block.
|
|
*/
|
|
nscoord
|
|
CalcQuirkContainingBlockHeight(const nsHTMLReflowState& aReflowState)
|
|
{
|
|
nsHTMLReflowState* firstAncestorRS = nsnull; // a candidate for html frame
|
|
nsHTMLReflowState* secondAncestorRS = nsnull; // a candidate for body frame
|
|
|
|
// initialize the default to NS_AUTOHEIGHT as this is the containings block
|
|
// computed height when this function is called. It is possible that we
|
|
// don't alter this height especially if we are restricted to one level
|
|
nscoord result = NS_AUTOHEIGHT;
|
|
|
|
const nsHTMLReflowState* rs = &aReflowState;
|
|
for (; rs && rs->frame; rs = (nsHTMLReflowState *)(rs->parentReflowState)) {
|
|
nsIAtom* frameType = rs->frame->GetType();
|
|
// if the ancestor is auto height then skip it and continue up if it
|
|
// is the first block/area frame and possibly the body/html
|
|
if (nsLayoutAtoms::blockFrame == frameType ||
|
|
nsLayoutAtoms::areaFrame == frameType ||
|
|
nsLayoutAtoms::scrollFrame == frameType) {
|
|
|
|
if (nsLayoutAtoms::areaFrame == frameType) {
|
|
// Skip over scrolled-content area frames
|
|
if (rs->frame->GetStyleContext()->GetPseudoType() ==
|
|
nsCSSAnonBoxes::scrolledContent) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
secondAncestorRS = firstAncestorRS;
|
|
firstAncestorRS = (nsHTMLReflowState*)rs;
|
|
|
|
// If the current frame we're looking at is positioned, we don't want to
|
|
// go any further (see bug 221784). The behavior we want here is: 1) If
|
|
// not auto-height, use this as the percentage base. 2) If auto-height,
|
|
// keep looking, unless the frame is positioned.
|
|
if (NS_AUTOHEIGHT == rs->mComputedHeight) {
|
|
if (rs->frame->GetStyleDisplay()->IsAbsolutelyPositioned()) {
|
|
break;
|
|
} else {
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
else if (nsLayoutAtoms::canvasFrame == frameType) {
|
|
// Use scroll frames' computed height if we have one, this will
|
|
// allow us to get viewport height for native scrollbars.
|
|
nsHTMLReflowState* scrollState = (nsHTMLReflowState *)rs->parentReflowState;
|
|
if (nsLayoutAtoms::scrollFrame == scrollState->frame->GetType()) {
|
|
rs = scrollState;
|
|
}
|
|
}
|
|
else if (nsLayoutAtoms::pageContentFrame == frameType) {
|
|
nsIFrame* prevInFlow;
|
|
rs->frame->GetPrevInFlow(&prevInFlow);
|
|
// only use the page content frame for a height basis if it is the first in flow
|
|
if (prevInFlow)
|
|
break;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
|
|
// if the ancestor is the page content frame then the percent base is
|
|
// the avail height, otherwise it is the computed height
|
|
result = (nsLayoutAtoms::pageContentFrame == frameType)
|
|
? rs->availableHeight : rs->mComputedHeight;
|
|
// if unconstrained - don't sutract borders - would result in huge height
|
|
if (NS_AUTOHEIGHT == result) return result;
|
|
|
|
// if we got to the canvas or page content frame, then subtract out
|
|
// margin/border/padding for the BODY and HTML elements
|
|
if ((nsLayoutAtoms::canvasFrame == frameType) ||
|
|
(nsLayoutAtoms::pageContentFrame == frameType)) {
|
|
|
|
result -= GetVerticalMarginBorderPadding(firstAncestorRS);
|
|
result -= GetVerticalMarginBorderPadding(secondAncestorRS);
|
|
|
|
#ifdef DEBUG
|
|
// make sure the first ancestor is the HTML and the second is the BODY
|
|
if (firstAncestorRS) {
|
|
nsIContent* frameContent = firstAncestorRS->frame->GetContent();
|
|
if (frameContent) {
|
|
nsIAtom *contentTag = frameContent->Tag();
|
|
NS_ASSERTION(contentTag == nsHTMLAtoms::html, "First ancestor is not HTML");
|
|
}
|
|
}
|
|
if (secondAncestorRS) {
|
|
nsIContent* frameContent = secondAncestorRS->frame->GetContent();
|
|
if (frameContent) {
|
|
nsIAtom *contentTag = frameContent->Tag();
|
|
NS_ASSERTION(contentTag == nsHTMLAtoms::body, "Second ancestor is not BODY");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
}
|
|
// if we got to the html frame, then subtract out
|
|
// margin/border/padding for the BODY element
|
|
else if (nsLayoutAtoms::areaFrame == frameType) {
|
|
// make sure it is the body
|
|
if (nsLayoutAtoms::canvasFrame == rs->parentReflowState->frame->GetType()) {
|
|
result -= GetVerticalMarginBorderPadding(secondAncestorRS);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
// Called by InitConstraints() to compute the containing block rectangle for
|
|
// the element. Handles the special logic for absolutely positioned elements
|
|
void
|
|
nsHTMLReflowState::ComputeContainingBlockRectangle(nsIPresContext* aPresContext,
|
|
const nsHTMLReflowState* aContainingBlockRS,
|
|
nscoord& aContainingBlockWidth,
|
|
nscoord& aContainingBlockHeight)
|
|
{
|
|
// Unless the element is absolutely positioned, the containing block is
|
|
// formed by the content edge of the nearest block-level ancestor
|
|
aContainingBlockWidth = aContainingBlockRS->mComputedWidth;
|
|
aContainingBlockHeight = aContainingBlockRS->mComputedHeight;
|
|
|
|
if (NS_FRAME_GET_TYPE(mFrameType) == NS_CSS_FRAME_TYPE_ABSOLUTE) {
|
|
// See if the ancestor is block-level or inline-level
|
|
if (NS_FRAME_GET_TYPE(aContainingBlockRS->mFrameType) == NS_CSS_FRAME_TYPE_INLINE) {
|
|
// Base our size on the actual size of the frame. In cases when this is
|
|
// completely bogus (eg initial reflow), this code shouldn't even be
|
|
// called, since the code in nsPositionedInlineFrame::Reflow will pass in
|
|
// the containing block dimensions to our constructor.
|
|
// XXXbz we should be taking the in-flows into account too, but
|
|
// that's very hard.
|
|
aContainingBlockWidth = aContainingBlockRS->frame->GetRect().width -
|
|
(aContainingBlockRS->mComputedBorderPadding.left +
|
|
aContainingBlockRS->mComputedBorderPadding.right);
|
|
NS_ASSERTION(aContainingBlockWidth >= 0,
|
|
"Negative containing block width!");
|
|
aContainingBlockHeight = aContainingBlockRS->frame->GetRect().height -
|
|
(aContainingBlockRS->mComputedBorderPadding.top +
|
|
aContainingBlockRS->mComputedBorderPadding.bottom);
|
|
NS_ASSERTION(aContainingBlockHeight >= 0,
|
|
"Negative containing block height!");
|
|
} else {
|
|
// If the ancestor is block-level, the containing block is formed by the
|
|
// padding edge of the ancestor
|
|
aContainingBlockWidth += aContainingBlockRS->mComputedPadding.left +
|
|
aContainingBlockRS->mComputedPadding.right;
|
|
|
|
// If the containing block is the initial containing block and it has a
|
|
// height that depends on its content, then use the viewport height instead.
|
|
// This gives us a reasonable value against which to compute percentage
|
|
// based heights and to do bottom relative positioning
|
|
if ((NS_AUTOHEIGHT == aContainingBlockHeight) &&
|
|
IsInitialContainingBlock(aContainingBlockRS->frame)) {
|
|
|
|
// Use the viewport height as the containing block height
|
|
const nsHTMLReflowState* rs = aContainingBlockRS->parentReflowState;
|
|
while (rs) {
|
|
aContainingBlockHeight = rs->mComputedHeight;
|
|
rs = rs->parentReflowState;
|
|
}
|
|
|
|
} else {
|
|
aContainingBlockHeight += aContainingBlockRS->mComputedPadding.top +
|
|
aContainingBlockRS->mComputedPadding.bottom;
|
|
}
|
|
}
|
|
} else {
|
|
// If this is an unconstrained reflow, then reset the containing block
|
|
// width to NS_UNCONSTRAINEDSIZE. This way percentage based values have
|
|
// no effect
|
|
if (NS_UNCONSTRAINEDSIZE == availableWidth) {
|
|
aContainingBlockWidth = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
// an element in quirks mode gets a containing block based on looking for a
|
|
// parent with a non-auto height if the element has a percent height
|
|
if (NS_AUTOHEIGHT == aContainingBlockHeight) {
|
|
if (eCompatibility_NavQuirks == aPresContext->CompatibilityMode() &&
|
|
mStylePosition->mHeight.GetUnit() == eStyleUnit_Percent) {
|
|
aContainingBlockHeight = CalcQuirkContainingBlockHeight(*aContainingBlockRS);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Prefs callback to pick up changes
|
|
static int PR_CALLBACK PrefsChanged(const char *aPrefName, void *instance)
|
|
{
|
|
nsCOMPtr<nsIPref> prefs = do_GetService(NS_PREF_CONTRACTID);
|
|
if (prefs) {
|
|
PRBool boolPref;
|
|
if (NS_SUCCEEDED(prefs->GetBoolPref("browser.blink_allowed", &boolPref)))
|
|
sBlinkIsAllowed = boolPref;
|
|
}
|
|
return 0; /* PREF_OK */
|
|
}
|
|
|
|
// Check to see if |text-decoration: blink| is allowed. The first time
|
|
// called, register the callback and then force-load the pref. After that,
|
|
// just use the cached value.
|
|
static PRBool BlinkIsAllowed(void)
|
|
{
|
|
if (!sPrefIsLoaded) {
|
|
// Set up a listener and check the initial value
|
|
nsCOMPtr<nsIPref> prefs = do_GetService(NS_PREF_CONTRACTID);
|
|
if (prefs) {
|
|
prefs->RegisterCallback("browser.blink_allowed", PrefsChanged,
|
|
nsnull);
|
|
}
|
|
PrefsChanged(nsnull, nsnull);
|
|
sPrefIsLoaded = PR_TRUE;
|
|
}
|
|
return sBlinkIsAllowed;
|
|
}
|
|
|
|
#ifdef FONT_LEADING_APIS_V2
|
|
static eNormalLineHeightControl GetNormalLineHeightCalcControl(void)
|
|
{
|
|
if (sNormalLineHeightControl == eUninitialized) {
|
|
nsCOMPtr<nsIPref> prefs = do_GetService(NS_PREF_CONTRACTID);
|
|
PRInt32 intPref;
|
|
// browser.display.normal_lineheight_calc_control is not user changable, so
|
|
// no need to register callback for it.
|
|
if (prefs && NS_SUCCEEDED(prefs->GetIntPref(
|
|
"browser.display.normal_lineheight_calc_control", &intPref)))
|
|
sNormalLineHeightControl = NS_STATIC_CAST(eNormalLineHeightControl, intPref);
|
|
else
|
|
sNormalLineHeightControl = eNoExternalLeading;
|
|
}
|
|
return sNormalLineHeightControl;
|
|
}
|
|
#endif
|
|
|
|
// XXX refactor this code to have methods for each set of properties
|
|
// we are computing: width,height,line-height; margin; offsets
|
|
|
|
void
|
|
nsHTMLReflowState::InitConstraints(nsIPresContext* aPresContext,
|
|
nscoord aContainingBlockWidth,
|
|
nscoord aContainingBlockHeight,
|
|
nsMargin* aBorder,
|
|
nsMargin* aPadding)
|
|
{
|
|
// If this is the root frame, then set the computed width and
|
|
// height equal to the available space
|
|
if (nsnull == parentReflowState) {
|
|
mComputedWidth = availableWidth;
|
|
mComputedHeight = availableHeight;
|
|
mComputedMargin.SizeTo(0, 0, 0, 0);
|
|
mComputedPadding.SizeTo(0, 0, 0, 0);
|
|
mComputedBorderPadding.SizeTo(0, 0, 0, 0);
|
|
mComputedOffsets.SizeTo(0, 0, 0, 0);
|
|
mComputedMinWidth = mComputedMinHeight = 0;
|
|
mComputedMaxWidth = mComputedMaxHeight = NS_UNCONSTRAINEDSIZE;
|
|
} else {
|
|
// Get the containing block reflow state
|
|
const nsHTMLReflowState* cbrs = mCBReflowState;
|
|
NS_ASSERTION(nsnull != cbrs, "no containing block");
|
|
|
|
// If we weren't given a containing block width and height, then
|
|
// compute one
|
|
if (aContainingBlockWidth == -1) {
|
|
ComputeContainingBlockRectangle(aPresContext, cbrs, aContainingBlockWidth,
|
|
aContainingBlockHeight);
|
|
}
|
|
|
|
#if 0
|
|
nsFrame::ListTag(stdout, frame); printf(": cb=");
|
|
nsFrame::ListTag(stdout, cbrs->frame); printf(" size=%d,%d\n", aContainingBlockWidth, aContainingBlockHeight);
|
|
#endif
|
|
|
|
// See if the containing block height is based on the size of its
|
|
// content
|
|
nsIAtom* fType;
|
|
if (NS_AUTOHEIGHT == aContainingBlockHeight) {
|
|
// See if the containing block is (1) a scrolled frame, i.e. its
|
|
// parent is a scroll frame. The presence of the intervening
|
|
// frame (that the scroll frame scrolls) needs to be hidden from
|
|
// the containingBlockHeight calcuation, or (2) a cell frame which needs
|
|
// to use the mComputedHeight of the cell instead of what the cell block passed in.
|
|
if (cbrs->parentReflowState) {
|
|
nsIFrame* f = cbrs->parentReflowState->frame;
|
|
fType = f->GetType();
|
|
if (nsLayoutAtoms::scrollFrame == fType) {
|
|
// Use the scroll frame's computed height instead
|
|
aContainingBlockHeight = cbrs->parentReflowState->mComputedHeight;
|
|
}
|
|
else {
|
|
fType = cbrs->frame->GetType();
|
|
if (IS_TABLE_CELL(fType)) {
|
|
// use the cell's computed height
|
|
aContainingBlockHeight = cbrs->mComputedHeight;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Compute margins from the specified margin style information. These
|
|
// become the default computed values, and may be adjusted below
|
|
// XXX fix to provide 0,0 for the top&bottom margins for
|
|
// inline-non-replaced elements
|
|
ComputeMargin(aContainingBlockWidth, cbrs);
|
|
if (aPadding) { // padding is an input arg
|
|
mComputedPadding.top = aPadding->top;
|
|
mComputedPadding.right = aPadding->right;
|
|
mComputedPadding.bottom = aPadding->bottom;
|
|
mComputedPadding.left = aPadding->left;
|
|
}
|
|
else {
|
|
ComputePadding(aContainingBlockWidth, cbrs);
|
|
}
|
|
if (aBorder) { // border is an input arg
|
|
mComputedBorderPadding.top = aBorder->top;
|
|
mComputedBorderPadding.right = aBorder->right;
|
|
mComputedBorderPadding.bottom = aBorder->bottom;
|
|
mComputedBorderPadding.left = aBorder->left;
|
|
}
|
|
else {
|
|
if (!mStyleBorder->GetBorder(mComputedBorderPadding)) {
|
|
// CSS2 has no percentage borders
|
|
mComputedBorderPadding.SizeTo(0, 0, 0, 0);
|
|
}
|
|
}
|
|
mComputedBorderPadding += mComputedPadding;
|
|
|
|
nsStyleUnit widthUnit = mStylePosition->mWidth.GetUnit();
|
|
nsStyleUnit heightUnit = mStylePosition->mHeight.GetUnit();
|
|
|
|
// Check for a percentage based width and an unconstrained containing
|
|
// block width
|
|
if (eStyleUnit_Percent == widthUnit) {
|
|
if (NS_UNCONSTRAINEDSIZE == aContainingBlockWidth) {
|
|
widthUnit = eStyleUnit_Auto;
|
|
}
|
|
}
|
|
// Check for a percentage based height and a containing block height
|
|
// that depends on the content height
|
|
if (eStyleUnit_Percent == heightUnit) {
|
|
if (NS_AUTOHEIGHT == aContainingBlockHeight) {
|
|
// this if clause enables %-height on replaced inline frames,
|
|
// such as images. See bug 54119. The else clause "heightUnit = eStyleUnit_Auto;"
|
|
// used to be called exclusively.
|
|
if (NS_FRAME_REPLACED(NS_CSS_FRAME_TYPE_INLINE) == mFrameType) {
|
|
// Get the containing block reflow state
|
|
NS_ASSERTION(nsnull != cbrs, "no containing block");
|
|
// in quirks mode, get the cb height using the special quirk method
|
|
if (eCompatibility_NavQuirks == aPresContext->CompatibilityMode()) {
|
|
if (!IS_TABLE_CELL(fType)) {
|
|
aContainingBlockHeight = CalcQuirkContainingBlockHeight(*cbrs);
|
|
if (aContainingBlockHeight == NS_AUTOHEIGHT) {
|
|
heightUnit = eStyleUnit_Auto;
|
|
}
|
|
}
|
|
else {
|
|
heightUnit = eStyleUnit_Auto;
|
|
}
|
|
}
|
|
// in standard mode, use the cb height. if it's "auto", as will be the case
|
|
// by default in BODY, use auto height as per CSS2 spec.
|
|
else
|
|
{
|
|
if (NS_AUTOHEIGHT != cbrs->mComputedHeight)
|
|
aContainingBlockHeight = cbrs->mComputedHeight;
|
|
else
|
|
heightUnit = eStyleUnit_Auto;
|
|
}
|
|
}
|
|
else {
|
|
// default to interpreting the height like 'auto'
|
|
heightUnit = eStyleUnit_Auto;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Compute our offsets if the element is relatively positioned. We need
|
|
// the correct containing block width and height here, which is why we need
|
|
// to do it after all the quirks-n-such above.
|
|
if (NS_STYLE_POSITION_RELATIVE == mStyleDisplay->mPosition) {
|
|
ComputeRelativeOffsets(cbrs, aContainingBlockWidth, aContainingBlockHeight);
|
|
} else {
|
|
// Initialize offsets to 0
|
|
mComputedOffsets.SizeTo(0, 0, 0, 0);
|
|
}
|
|
|
|
// Calculate the computed values for min and max properties
|
|
ComputeMinMaxValues(aContainingBlockWidth, aContainingBlockHeight, cbrs);
|
|
|
|
// Calculate the computed width and height. This varies by frame type
|
|
if ((NS_FRAME_REPLACED(NS_CSS_FRAME_TYPE_INLINE) == mFrameType) ||
|
|
(NS_FRAME_REPLACED(NS_CSS_FRAME_TYPE_FLOATING) == mFrameType)) {
|
|
// Inline replaced element and floating replaced element are basically
|
|
// treated the same. First calculate the computed width
|
|
if (eStyleUnit_Auto == widthUnit) {
|
|
// A specified value of 'auto' uses the element's intrinsic width
|
|
mComputedWidth = NS_INTRINSICSIZE;
|
|
} else {
|
|
ComputeHorizontalValue(aContainingBlockWidth, widthUnit,
|
|
mStylePosition->mWidth, mComputedWidth);
|
|
}
|
|
|
|
AdjustComputedWidth(PR_TRUE);
|
|
|
|
// Now calculate the computed height
|
|
if (eStyleUnit_Auto == heightUnit) {
|
|
// A specified value of 'auto' uses the element's intrinsic height
|
|
mComputedHeight = NS_INTRINSICSIZE;
|
|
} else {
|
|
ComputeVerticalValue(aContainingBlockHeight, heightUnit,
|
|
mStylePosition->mHeight,
|
|
mComputedHeight);
|
|
}
|
|
|
|
AdjustComputedHeight(PR_TRUE);
|
|
|
|
} else if (NS_CSS_FRAME_TYPE_FLOATING == mFrameType) {
|
|
// Floating non-replaced element. First calculate the computed width
|
|
if (eStyleUnit_Auto == widthUnit) {
|
|
if ((NS_UNCONSTRAINEDSIZE == aContainingBlockWidth) &&
|
|
(eStyleUnit_Percent == mStylePosition->mWidth.GetUnit())) {
|
|
// The element has a percentage width, but since the containing
|
|
// block width is unconstrained we set 'widthUnit' to 'auto'
|
|
// above. However, we want the element to be unconstrained, too
|
|
mComputedWidth = NS_UNCONSTRAINEDSIZE;
|
|
|
|
} else if (NS_STYLE_DISPLAY_TABLE == mStyleDisplay->mDisplay) {
|
|
// It's an outer table because an inner table is not positioned
|
|
// shrink wrap its width since the outer table is anonymous
|
|
mComputedWidth = NS_SHRINKWRAPWIDTH;
|
|
|
|
} else {
|
|
// The CSS2 spec says the computed width should be 0; however, that's
|
|
// not what Nav and IE do and even the spec doesn't really want that
|
|
// to happen.
|
|
//
|
|
// Instead, have the element shrink wrap its width
|
|
mComputedWidth = NS_SHRINKWRAPWIDTH;
|
|
|
|
// Limnit the width to the containing block width
|
|
nscoord widthFromCB = aContainingBlockWidth;
|
|
if (NS_UNCONSTRAINEDSIZE != widthFromCB) {
|
|
widthFromCB -= mComputedBorderPadding.left + mComputedBorderPadding.right +
|
|
mComputedMargin.left + mComputedMargin.right;
|
|
}
|
|
if (mComputedMaxWidth > widthFromCB) {
|
|
mComputedMaxWidth = widthFromCB;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
ComputeHorizontalValue(aContainingBlockWidth, widthUnit,
|
|
mStylePosition->mWidth, mComputedWidth);
|
|
}
|
|
|
|
// Take into account minimum and maximum sizes
|
|
AdjustComputedWidth(PR_TRUE);
|
|
|
|
// Now calculate the computed height
|
|
if (eStyleUnit_Auto == heightUnit) {
|
|
mComputedHeight = NS_AUTOHEIGHT; // let it choose its height
|
|
} else {
|
|
ComputeVerticalValue(aContainingBlockHeight, heightUnit,
|
|
mStylePosition->mHeight,
|
|
mComputedHeight);
|
|
}
|
|
|
|
AdjustComputedHeight(PR_TRUE);
|
|
|
|
} else if (NS_CSS_FRAME_TYPE_INTERNAL_TABLE == mFrameType) {
|
|
// Internal table elements. The rules vary depending on the type.
|
|
// Calculate the computed width
|
|
PRBool rowOrRowGroup = PR_FALSE;
|
|
if ((NS_STYLE_DISPLAY_TABLE_ROW == mStyleDisplay->mDisplay) ||
|
|
(NS_STYLE_DISPLAY_TABLE_ROW_GROUP == mStyleDisplay->mDisplay)) {
|
|
// 'width' property doesn't apply to table rows and row groups
|
|
widthUnit = eStyleUnit_Auto;
|
|
rowOrRowGroup = PR_TRUE;
|
|
}
|
|
|
|
if (eStyleUnit_Auto == widthUnit) {
|
|
mComputedWidth = availableWidth;
|
|
|
|
if ((mComputedWidth != NS_UNCONSTRAINEDSIZE) && !rowOrRowGroup){
|
|
// Internal table elements don't have margins. Only tables and
|
|
// cells have border and padding
|
|
mComputedWidth -= mComputedBorderPadding.left +
|
|
mComputedBorderPadding.right;
|
|
}
|
|
|
|
} else {
|
|
ComputeHorizontalValue(aContainingBlockWidth, widthUnit,
|
|
mStylePosition->mWidth, mComputedWidth);
|
|
}
|
|
|
|
// Calculate the computed height
|
|
if ((NS_STYLE_DISPLAY_TABLE_COLUMN == mStyleDisplay->mDisplay) ||
|
|
(NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP == mStyleDisplay->mDisplay)) {
|
|
// 'height' property doesn't apply to table columns and column groups
|
|
heightUnit = eStyleUnit_Auto;
|
|
}
|
|
if (eStyleUnit_Auto == heightUnit) {
|
|
mComputedHeight = NS_AUTOHEIGHT;
|
|
} else {
|
|
ComputeVerticalValue(aContainingBlockHeight, heightUnit,
|
|
mStylePosition->mHeight,
|
|
mComputedHeight);
|
|
}
|
|
|
|
// Doesn't apply to table elements
|
|
mComputedMinWidth = mComputedMinHeight = 0;
|
|
mComputedMaxWidth = mComputedMaxHeight = NS_UNCONSTRAINEDSIZE;
|
|
|
|
} else if (NS_FRAME_GET_TYPE(mFrameType) == NS_CSS_FRAME_TYPE_ABSOLUTE) {
|
|
// XXX not sure if this belongs here or somewhere else - cwk
|
|
InitAbsoluteConstraints(aPresContext, cbrs, aContainingBlockWidth,
|
|
aContainingBlockHeight);
|
|
} else if (NS_CSS_FRAME_TYPE_INLINE == mFrameType) {
|
|
// Inline non-replaced elements do not have computed widths or heights
|
|
// XXX add this check to HaveFixedContentHeight/Width too
|
|
mComputedWidth = NS_UNCONSTRAINEDSIZE;
|
|
mComputedHeight = NS_UNCONSTRAINEDSIZE;
|
|
mComputedMargin.top = 0;
|
|
mComputedMargin.bottom = 0;
|
|
mComputedMinWidth = mComputedMinHeight = 0;
|
|
mComputedMaxWidth = mComputedMaxHeight = NS_UNCONSTRAINEDSIZE;
|
|
} else {
|
|
ComputeBlockBoxData(aPresContext, cbrs, widthUnit, heightUnit,
|
|
aContainingBlockWidth,
|
|
aContainingBlockHeight);
|
|
}
|
|
}
|
|
// Check for blinking text and permission to display it
|
|
mFlags.mBlinks = (parentReflowState && parentReflowState->mFlags.mBlinks);
|
|
if (!mFlags.mBlinks && BlinkIsAllowed()) {
|
|
const nsStyleTextReset* st = frame->GetStyleTextReset();
|
|
mFlags.mBlinks =
|
|
((st->mTextDecoration & NS_STYLE_TEXT_DECORATION_BLINK) != 0);
|
|
}
|
|
}
|
|
|
|
// Compute the box data for block and block-replaced elements in the
|
|
// normal flow.
|
|
void
|
|
nsHTMLReflowState::ComputeBlockBoxData(nsIPresContext* aPresContext,
|
|
const nsHTMLReflowState* cbrs,
|
|
nsStyleUnit aWidthUnit,
|
|
nsStyleUnit aHeightUnit,
|
|
nscoord aContainingBlockWidth,
|
|
nscoord aContainingBlockHeight)
|
|
{
|
|
// Compute the content width
|
|
if (eStyleUnit_Auto == aWidthUnit) {
|
|
if (NS_FRAME_IS_REPLACED(mFrameType)) {
|
|
// Block-level replaced element in the flow. A specified value of
|
|
// 'auto' uses the element's intrinsic width (CSS2 10.3.4)
|
|
mComputedWidth = NS_INTRINSICSIZE;
|
|
} else {
|
|
// Block-level non-replaced element in the flow. 'auto' values
|
|
// for margin-left and margin-right become 0, and the sum of the
|
|
// areas must equal the width of the content-area of the parent
|
|
// element.
|
|
if (NS_UNCONSTRAINEDSIZE == availableWidth) {
|
|
// During pass1 table reflow, auto side margin values are
|
|
// uncomputable (== 0).
|
|
mComputedWidth = NS_UNCONSTRAINEDSIZE;
|
|
} else if (NS_SHRINKWRAPWIDTH == aContainingBlockWidth) {
|
|
// The containing block should shrink wrap its width, so have
|
|
// the child block do the same
|
|
mComputedWidth = NS_UNCONSTRAINEDSIZE;
|
|
|
|
// Let its content area be as wide as the containing block's max width
|
|
// minus any margin and border/padding
|
|
nscoord maxWidth = cbrs->mComputedMaxWidth;
|
|
if (NS_UNCONSTRAINEDSIZE != maxWidth) {
|
|
maxWidth -= mComputedMargin.left + mComputedBorderPadding.left +
|
|
mComputedMargin.right + mComputedBorderPadding.right;
|
|
}
|
|
if (maxWidth < mComputedMaxWidth) {
|
|
mComputedMaxWidth = maxWidth;
|
|
}
|
|
|
|
} else {
|
|
// tables act like replaced elements regarding mComputedWidth
|
|
nsIAtom* fType = frame->GetType();
|
|
if (nsLayoutAtoms::tableOuterFrame == fType) {
|
|
mComputedWidth = 0; // XXX temp fix for trees
|
|
} else if ((nsLayoutAtoms::tableFrame == fType) ||
|
|
(nsLayoutAtoms::tableCaptionFrame == fType)) {
|
|
mComputedWidth = NS_SHRINKWRAPWIDTH;
|
|
if (eStyleUnit_Auto == mStyleMargin->mMargin.GetLeftUnit()) {
|
|
mComputedMargin.left = NS_AUTOMARGIN;
|
|
}
|
|
if (eStyleUnit_Auto == mStyleMargin->mMargin.GetRightUnit()) {
|
|
mComputedMargin.right = NS_AUTOMARGIN;
|
|
}
|
|
} else {
|
|
mComputedWidth = availableWidth - mComputedMargin.left -
|
|
mComputedMargin.right - mComputedBorderPadding.left -
|
|
mComputedBorderPadding.right;
|
|
mComputedWidth = PR_MAX(mComputedWidth, 0);
|
|
}
|
|
|
|
AdjustComputedWidth(PR_FALSE);
|
|
CalculateBlockSideMargins(cbrs->mComputedWidth, mComputedWidth);
|
|
}
|
|
}
|
|
} else {
|
|
ComputeHorizontalValue(aContainingBlockWidth, aWidthUnit,
|
|
mStylePosition->mWidth, mComputedWidth);
|
|
|
|
AdjustComputedWidth(PR_TRUE);
|
|
|
|
// Now that we have the computed-width, compute the side margins
|
|
CalculateBlockSideMargins(cbrs->mComputedWidth, mComputedWidth);
|
|
}
|
|
|
|
// Compute the content height
|
|
if (eStyleUnit_Auto == aHeightUnit) {
|
|
if (NS_FRAME_IS_REPLACED(mFrameType)) {
|
|
// For replaced elements use the intrinsic size for "auto"
|
|
mComputedHeight = NS_INTRINSICSIZE;
|
|
} else {
|
|
// For non-replaced elements auto means unconstrained
|
|
mComputedHeight = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
} else {
|
|
ComputeVerticalValue(aContainingBlockHeight, aHeightUnit,
|
|
mStylePosition->mHeight, mComputedHeight);
|
|
}
|
|
AdjustComputedHeight(PR_TRUE);
|
|
}
|
|
|
|
// This code enforces section 10.3.3 of the CSS2 spec for this formula:
|
|
//
|
|
// 'margin-left' + 'border-left-width' + 'padding-left' + 'width' +
|
|
// 'padding-right' + 'border-right-width' + 'margin-right'
|
|
// = width of containing block
|
|
//
|
|
// Note: the width unit is not auto when this is called
|
|
void
|
|
nsHTMLReflowState::CalculateBlockSideMargins(nscoord aAvailWidth,
|
|
nscoord aComputedWidth)
|
|
{
|
|
// Because of the ugly way we do intrinsic sizing within Reflow, this method
|
|
// doesn't necessarily produce the right results. The results will be
|
|
// adjusted in nsBlockReflowContext::AlignBlockHorizontally after reflow.
|
|
// The code for tables is particularly sensitive to regressions; the
|
|
// numerous |isTable| checks are technically incorrect, but necessary
|
|
// for basic testcases.
|
|
|
|
// We can only provide values for auto side margins in a constrained
|
|
// reflow. For unconstrained reflow there is no effective width to
|
|
// compute against...
|
|
if (NS_UNCONSTRAINEDSIZE == aComputedWidth ||
|
|
NS_UNCONSTRAINEDSIZE == aAvailWidth)
|
|
return;
|
|
|
|
nscoord sum = mComputedMargin.left + mComputedBorderPadding.left +
|
|
aComputedWidth + mComputedBorderPadding.right + mComputedMargin.right;
|
|
if (sum == aAvailWidth)
|
|
// The sum is already correct
|
|
return;
|
|
|
|
// Determine the left and right margin values. The width value
|
|
// remains constant while we do this.
|
|
|
|
PRBool isTable = mStyleDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE ||
|
|
mStyleDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_CAPTION;
|
|
|
|
// Calculate how much space is available for margins
|
|
nscoord availMarginSpace = aAvailWidth - sum;
|
|
|
|
// XXXldb Should this be quirks-mode only? And why captions?
|
|
if (isTable)
|
|
// XXXldb Why does this break things so badly if this is changed to
|
|
// availMarginSpace += mComputedBorderPadding.left +
|
|
// mComputedBorderPadding.right;
|
|
availMarginSpace = aAvailWidth - aComputedWidth;
|
|
|
|
// If the available margin space is negative, then don't follow the
|
|
// usual overconstraint rules.
|
|
if (availMarginSpace < 0) {
|
|
if (!isTable) {
|
|
if (mStyleVisibility->mDirection == NS_STYLE_DIRECTION_LTR) {
|
|
mComputedMargin.right += availMarginSpace;
|
|
} else {
|
|
mComputedMargin.left += availMarginSpace;
|
|
}
|
|
} else {
|
|
mComputedMargin.left = 0;
|
|
mComputedMargin.right = 0;
|
|
if (mStyleVisibility->mDirection == NS_STYLE_DIRECTION_RTL) {
|
|
mComputedMargin.left = availMarginSpace;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
// The css2 spec clearly defines how block elements should behave
|
|
// in section 10.3.3.
|
|
PRBool isAutoLeftMargin =
|
|
eStyleUnit_Auto == mStyleMargin->mMargin.GetLeftUnit();
|
|
PRBool isAutoRightMargin =
|
|
eStyleUnit_Auto == mStyleMargin->mMargin.GetRightUnit();
|
|
if (!isAutoLeftMargin && !isAutoRightMargin && !isTable) {
|
|
// Neither margin is 'auto' so we're over constrained. Use the
|
|
// 'direction' property of the parent to tell which margin to
|
|
// ignore
|
|
// First check if there is an HTML alignment that we should honor
|
|
const nsHTMLReflowState* prs = parentReflowState;
|
|
if (prs &&
|
|
(prs->mStyleText->mTextAlign == NS_STYLE_TEXT_ALIGN_MOZ_CENTER ||
|
|
prs->mStyleText->mTextAlign == NS_STYLE_TEXT_ALIGN_MOZ_RIGHT)) {
|
|
isAutoLeftMargin = PR_TRUE;
|
|
isAutoRightMargin =
|
|
prs->mStyleText->mTextAlign == NS_STYLE_TEXT_ALIGN_MOZ_CENTER;
|
|
}
|
|
// Otherwise apply the CSS rules, and ignore one margin by forcing
|
|
// it to 'auto', depending on 'direction'.
|
|
else if (NS_STYLE_DIRECTION_LTR == mStyleVisibility->mDirection) {
|
|
isAutoRightMargin = PR_TRUE;
|
|
}
|
|
else {
|
|
isAutoLeftMargin = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
// Logic which is common to blocks and tables
|
|
if (isAutoLeftMargin) {
|
|
if (isAutoRightMargin) {
|
|
// Both margins are 'auto' so their computed values are equal
|
|
mComputedMargin.left = availMarginSpace / 2;
|
|
mComputedMargin.right = availMarginSpace - mComputedMargin.left;
|
|
} else {
|
|
mComputedMargin.left = availMarginSpace;
|
|
}
|
|
} else if (isAutoRightMargin) {
|
|
mComputedMargin.right = availMarginSpace;
|
|
}
|
|
}
|
|
|
|
PRBool
|
|
nsHTMLReflowState::UseComputedHeight()
|
|
{
|
|
static PRBool useComputedHeight = PR_FALSE;
|
|
|
|
#if defined(XP_UNIX) || defined(XP_WIN) || defined(XP_OS2) || defined(XP_BEOS)
|
|
static PRBool firstTime = 1;
|
|
if (firstTime) {
|
|
if (getenv("GECKO_USE_COMPUTED_HEIGHT")) {
|
|
useComputedHeight = PR_TRUE;
|
|
}
|
|
firstTime = 0;
|
|
}
|
|
#endif
|
|
return useComputedHeight;
|
|
}
|
|
|
|
#define NORMAL_LINE_HEIGHT_FACTOR 1.2f // in term of emHeight
|
|
// For "normal" we use the font's normal line height (em height + leading).
|
|
// If both internal leading and external leading specified by font itself
|
|
// are zeros, we should compensate this by creating extra (external) leading
|
|
// in eCompensateLeading mode. This is necessary because without this
|
|
// compensation, normal line height might looks too tight.
|
|
|
|
// For risk management, we use preference to control the behavior, and
|
|
// eNoExternalLeading is the old behavior.
|
|
static nscoord
|
|
GetNormalLineHeight(nsIFontMetrics* aFontMetrics)
|
|
{
|
|
NS_PRECONDITION(nsnull != aFontMetrics, "no font metrics");
|
|
|
|
nscoord normalLineHeight;
|
|
|
|
#ifdef FONT_LEADING_APIS_V2
|
|
nscoord externalLeading, internalLeading, emHeight;
|
|
aFontMetrics->GetExternalLeading(externalLeading);
|
|
aFontMetrics->GetInternalLeading(internalLeading);
|
|
aFontMetrics->GetEmHeight(emHeight);
|
|
switch (GetNormalLineHeightCalcControl()) {
|
|
case eIncludeExternalLeading:
|
|
normalLineHeight = emHeight+ internalLeading + externalLeading;
|
|
break;
|
|
case eCompensateLeading:
|
|
if (!internalLeading && !externalLeading)
|
|
normalLineHeight = NSToCoordRound(emHeight * NORMAL_LINE_HEIGHT_FACTOR);
|
|
else
|
|
normalLineHeight = emHeight+ internalLeading + externalLeading;
|
|
break;
|
|
default:
|
|
//case eNoExternalLeading:
|
|
normalLineHeight = emHeight + internalLeading;
|
|
}
|
|
#else
|
|
aFontMetrics->GetNormalLineHeight(normalLineHeight);
|
|
#endif // FONT_LEADING_APIS_V2
|
|
return normalLineHeight;
|
|
}
|
|
|
|
static nscoord
|
|
ComputeLineHeight(nsIPresContext* aPresContext,
|
|
nsIRenderingContext* aRenderingContext,
|
|
nsStyleContext* aStyleContext)
|
|
{
|
|
NS_PRECONDITION(nsnull != aRenderingContext, "no rendering context");
|
|
|
|
nscoord lineHeight = -1;
|
|
|
|
const nsStyleText* text = aStyleContext->GetStyleText();
|
|
const nsStyleFont* font = aStyleContext->GetStyleFont();
|
|
const nsStyleVisibility* vis = aStyleContext->GetStyleVisibility();
|
|
|
|
nsStyleUnit unit = text->mLineHeight.GetUnit();
|
|
|
|
if (unit == eStyleUnit_Coord) {
|
|
// For length values just use the pre-computed value
|
|
lineHeight = text->mLineHeight.GetCoordValue();
|
|
} else {
|
|
nsCOMPtr<nsIDeviceContext> deviceContext;
|
|
aRenderingContext->GetDeviceContext(*getter_AddRefs(deviceContext));
|
|
nsCOMPtr<nsIAtom> langGroup;
|
|
if (vis->mLanguage) {
|
|
vis->mLanguage->GetLanguageGroup(getter_AddRefs(langGroup));
|
|
}
|
|
nsCOMPtr<nsIFontMetrics> fm;
|
|
deviceContext->GetMetricsFor(font->mFont, langGroup, *getter_AddRefs(fm));
|
|
if (unit == eStyleUnit_Factor) {
|
|
// For factor units the computed value of the line-height property
|
|
// is found by multiplying the factor by the font's <b>actual</b>
|
|
// em height.
|
|
float factor;
|
|
factor = text->mLineHeight.GetFactorValue();
|
|
// Note: we normally use the actual font height for computing the
|
|
// line-height raw value from the style context. On systems where
|
|
// they disagree the actual font height is more appropriate. This
|
|
// little hack lets us override that behavior to allow for more
|
|
// precise layout in the face of imprecise fonts.
|
|
nscoord emHeight = font->mFont.size;
|
|
if (!nsHTMLReflowState::UseComputedHeight()) {
|
|
fm->GetEmHeight(emHeight);
|
|
}
|
|
lineHeight = NSToCoordRound(factor * emHeight);
|
|
} else {
|
|
NS_ASSERTION(eStyleUnit_Normal == unit, "bad unit");
|
|
lineHeight = font->mFont.size;
|
|
if (!nsHTMLReflowState::UseComputedHeight()) {
|
|
lineHeight = GetNormalLineHeight(fm);
|
|
}
|
|
}
|
|
}
|
|
return lineHeight;
|
|
}
|
|
|
|
nscoord
|
|
nsHTMLReflowState::CalcLineHeight(nsIPresContext* aPresContext,
|
|
nsIRenderingContext* aRenderingContext,
|
|
nsIFrame* aFrame)
|
|
{
|
|
NS_ASSERTION(aFrame && aFrame->GetStyleContext(),
|
|
"Bogus data passed in to CalcLineHeight");
|
|
|
|
nscoord lineHeight = ComputeLineHeight(aPresContext, aRenderingContext,
|
|
aFrame->GetStyleContext());
|
|
|
|
NS_ASSERTION(lineHeight >= 0, "ComputeLineHeight screwed up");
|
|
|
|
return lineHeight;
|
|
}
|
|
|
|
void
|
|
nsHTMLReflowState::ComputeHorizontalValue(nscoord aContainingBlockWidth,
|
|
nsStyleUnit aUnit,
|
|
const nsStyleCoord& aCoord,
|
|
nscoord& aResult)
|
|
{
|
|
aResult = 0;
|
|
if (eStyleUnit_Percent == aUnit) {
|
|
if (NS_UNCONSTRAINEDSIZE == aContainingBlockWidth) {
|
|
aResult = 0;
|
|
} else {
|
|
float pct = aCoord.GetPercentValue();
|
|
aResult = NSToCoordFloor(aContainingBlockWidth * pct);
|
|
}
|
|
|
|
} else if (eStyleUnit_Coord == aUnit) {
|
|
aResult = aCoord.GetCoordValue();
|
|
}
|
|
else if (eStyleUnit_Chars == aUnit) {
|
|
if ((nsnull == rendContext) || (nsnull == frame)) {
|
|
// We can't compute it without a rendering context or frame, so
|
|
// pretend its zero...
|
|
}
|
|
else {
|
|
nsStyleContext* styleContext = frame->GetStyleContext();
|
|
SetFontFromStyle(rendContext, styleContext);
|
|
nscoord fontWidth;
|
|
rendContext->GetWidth('M', fontWidth);
|
|
aResult = aCoord.GetIntValue() * fontWidth;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsHTMLReflowState::ComputeVerticalValue(nscoord aContainingBlockHeight,
|
|
nsStyleUnit aUnit,
|
|
const nsStyleCoord& aCoord,
|
|
nscoord& aResult)
|
|
{
|
|
aResult = 0;
|
|
if (eStyleUnit_Percent == aUnit) {
|
|
// Verify no one is trying to calculate a percentage based height against
|
|
// a height that's shrink wrapping to its content. In that case they should
|
|
// treat the specified value like 'auto'
|
|
NS_ASSERTION(NS_AUTOHEIGHT != aContainingBlockHeight, "unexpected containing block height");
|
|
if (NS_AUTOHEIGHT!=aContainingBlockHeight)
|
|
{
|
|
float pct = aCoord.GetPercentValue();
|
|
aResult = NSToCoordFloor(aContainingBlockHeight * pct);
|
|
}
|
|
else { // safest thing to do for an undefined height is to make it 0
|
|
aResult = 0;
|
|
}
|
|
|
|
} else if (eStyleUnit_Coord == aUnit) {
|
|
aResult = aCoord.GetCoordValue();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsHTMLReflowState::ComputeMargin(nscoord aContainingBlockWidth,
|
|
const nsHTMLReflowState* aContainingBlockRS)
|
|
{
|
|
// If style style can provide us the margin directly, then use it.
|
|
if (!mStyleMargin->GetMargin(mComputedMargin)) {
|
|
// We have to compute the value
|
|
if (NS_UNCONSTRAINEDSIZE == aContainingBlockWidth) {
|
|
mComputedMargin.left = 0;
|
|
mComputedMargin.right = 0;
|
|
|
|
if (eStyleUnit_Coord == mStyleMargin->mMargin.GetLeftUnit()) {
|
|
nsStyleCoord left;
|
|
|
|
mStyleMargin->mMargin.GetLeft(left),
|
|
mComputedMargin.left = left.GetCoordValue();
|
|
}
|
|
if (eStyleUnit_Coord == mStyleMargin->mMargin.GetRightUnit()) {
|
|
nsStyleCoord right;
|
|
|
|
mStyleMargin->mMargin.GetRight(right),
|
|
mComputedMargin.right = right.GetCoordValue();
|
|
}
|
|
|
|
} else {
|
|
nsStyleCoord left, right;
|
|
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStyleMargin->mMargin.GetLeftUnit(),
|
|
mStyleMargin->mMargin.GetLeft(left),
|
|
mComputedMargin.left);
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStyleMargin->mMargin.GetRightUnit(),
|
|
mStyleMargin->mMargin.GetRight(right),
|
|
mComputedMargin.right);
|
|
}
|
|
|
|
const nsHTMLReflowState* rs2 = GetPageBoxReflowState(parentReflowState);
|
|
nsStyleCoord top, bottom;
|
|
if (nsnull != rs2) {
|
|
// According to the CSS2 spec, margin percentages are
|
|
// calculated with respect to the *height* of the containing
|
|
// block when in a paginated context.
|
|
ComputeVerticalValue(rs2->mComputedHeight,
|
|
mStyleMargin->mMargin.GetTopUnit(),
|
|
mStyleMargin->mMargin.GetTop(top),
|
|
mComputedMargin.top);
|
|
ComputeVerticalValue(rs2->mComputedHeight,
|
|
mStyleMargin->mMargin.GetBottomUnit(),
|
|
mStyleMargin->mMargin.GetBottom(bottom),
|
|
mComputedMargin.bottom);
|
|
}
|
|
else {
|
|
// According to the CSS2 spec, margin percentages are
|
|
// calculated with respect to the *width* of the containing
|
|
// block, even for margin-top and margin-bottom.
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStyleMargin->mMargin.GetTopUnit(),
|
|
mStyleMargin->mMargin.GetTop(top),
|
|
mComputedMargin.top);
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStyleMargin->mMargin.GetBottomUnit(),
|
|
mStyleMargin->mMargin.GetBottom(bottom),
|
|
mComputedMargin.bottom);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsHTMLReflowState::ComputePadding(nscoord aContainingBlockWidth,
|
|
const nsHTMLReflowState* aContainingBlockRS)
|
|
|
|
{
|
|
// If style can provide us the padding directly, then use it.
|
|
if (!mStylePadding->GetPadding(mComputedPadding)) {
|
|
// We have to compute the value
|
|
nsStyleCoord left, right, top, bottom;
|
|
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStylePadding->mPadding.GetLeftUnit(),
|
|
mStylePadding->mPadding.GetLeft(left),
|
|
mComputedPadding.left);
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStylePadding->mPadding.GetRightUnit(),
|
|
mStylePadding->mPadding.GetRight(right),
|
|
mComputedPadding.right);
|
|
|
|
// According to the CSS2 spec, percentages are calculated with respect to
|
|
// containing block width for padding-top and padding-bottom
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStylePadding->mPadding.GetTopUnit(),
|
|
mStylePadding->mPadding.GetTop(top),
|
|
mComputedPadding.top);
|
|
ComputeHorizontalValue(aContainingBlockWidth,
|
|
mStylePadding->mPadding.GetBottomUnit(),
|
|
mStylePadding->mPadding.GetBottom(bottom),
|
|
mComputedPadding.bottom);
|
|
}
|
|
// a table row/col group, row/col doesn't have padding
|
|
if (frame) {
|
|
nsIAtom* frameType = frame->GetType();
|
|
if ((nsLayoutAtoms::tableRowGroupFrame == frameType) ||
|
|
(nsLayoutAtoms::tableColGroupFrame == frameType) ||
|
|
(nsLayoutAtoms::tableRowFrame == frameType) ||
|
|
(nsLayoutAtoms::tableColFrame == frameType)) {
|
|
mComputedPadding.top = 0;
|
|
mComputedPadding.right = 0;
|
|
mComputedPadding.bottom = 0;
|
|
mComputedPadding.left = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsHTMLReflowState::ComputeMinMaxValues(nscoord aContainingBlockWidth,
|
|
nscoord aContainingBlockHeight,
|
|
const nsHTMLReflowState* aContainingBlockRS)
|
|
{
|
|
nsStyleUnit minWidthUnit = mStylePosition->mMinWidth.GetUnit();
|
|
ComputeHorizontalValue(aContainingBlockWidth, minWidthUnit,
|
|
mStylePosition->mMinWidth, mComputedMinWidth);
|
|
nsStyleUnit maxWidthUnit = mStylePosition->mMaxWidth.GetUnit();
|
|
if (eStyleUnit_Null == maxWidthUnit) {
|
|
// Specified value of 'none'
|
|
mComputedMaxWidth = NS_UNCONSTRAINEDSIZE; // no limit
|
|
} else {
|
|
ComputeHorizontalValue(aContainingBlockWidth, maxWidthUnit,
|
|
mStylePosition->mMaxWidth, mComputedMaxWidth);
|
|
}
|
|
|
|
// If the computed value of 'min-width' is greater than the value of
|
|
// 'max-width', 'max-width' is set to the value of 'min-width'
|
|
if (mComputedMinWidth > mComputedMaxWidth) {
|
|
mComputedMaxWidth = mComputedMinWidth;
|
|
}
|
|
|
|
nsStyleUnit minHeightUnit = mStylePosition->mMinHeight.GetUnit();
|
|
// Check for percentage based values and a containing block height that
|
|
// depends on the content height. Treat them like 'auto'
|
|
if ((NS_AUTOHEIGHT == aContainingBlockHeight) &&
|
|
(eStyleUnit_Percent == minHeightUnit)) {
|
|
mComputedMinHeight = 0;
|
|
} else {
|
|
ComputeVerticalValue(aContainingBlockHeight, minHeightUnit,
|
|
mStylePosition->mMinHeight, mComputedMinHeight);
|
|
}
|
|
nsStyleUnit maxHeightUnit = mStylePosition->mMaxHeight.GetUnit();
|
|
if (eStyleUnit_Null == maxHeightUnit) {
|
|
// Specified value of 'none'
|
|
mComputedMaxHeight = NS_UNCONSTRAINEDSIZE; // no limit
|
|
} else {
|
|
// Check for percentage based values and a containing block height that
|
|
// depends on the content height. Treat them like 'auto'
|
|
if ((NS_AUTOHEIGHT == aContainingBlockHeight) &&
|
|
(eStyleUnit_Percent == maxHeightUnit)) {
|
|
mComputedMaxHeight = NS_UNCONSTRAINEDSIZE;
|
|
} else {
|
|
ComputeVerticalValue(aContainingBlockHeight, maxHeightUnit,
|
|
mStylePosition->mMaxHeight, mComputedMaxHeight);
|
|
}
|
|
}
|
|
|
|
// If the computed value of 'min-height' is greater than the value of
|
|
// 'max-height', 'max-height' is set to the value of 'min-height'
|
|
if (mComputedMinHeight > mComputedMaxHeight) {
|
|
mComputedMaxHeight = mComputedMinHeight;
|
|
}
|
|
}
|
|
|
|
|
|
void nsHTMLReflowState::AdjustComputedHeight(PRBool aAdjustForBoxSizing)
|
|
{
|
|
// only do the math if the height is not a symbolic value
|
|
if (mComputedHeight == NS_UNCONSTRAINEDSIZE) {
|
|
return;
|
|
}
|
|
|
|
NS_ASSERTION(mComputedHeight >= 0, "Negative Height Input - very bad");
|
|
|
|
// Factor in any minimum and maximum size information
|
|
if (mComputedHeight > mComputedMaxHeight) {
|
|
mComputedHeight = mComputedMaxHeight;
|
|
} else if (mComputedHeight < mComputedMinHeight) {
|
|
mComputedHeight = mComputedMinHeight;
|
|
}
|
|
|
|
if (aAdjustForBoxSizing) {
|
|
// remove extra padding/border if box-sizing property is set
|
|
switch (mStylePosition->mBoxSizing) {
|
|
case NS_STYLE_BOX_SIZING_PADDING : {
|
|
mComputedHeight -= mComputedPadding.top + mComputedPadding.bottom;
|
|
break;
|
|
}
|
|
case NS_STYLE_BOX_SIZING_BORDER : {
|
|
mComputedHeight -= mComputedBorderPadding.top + mComputedBorderPadding.bottom;
|
|
}
|
|
default : break;
|
|
}
|
|
|
|
// If it did go bozo because of too much border or padding, set to 0
|
|
if(mComputedHeight < 0) mComputedHeight = 0;
|
|
}
|
|
}
|
|
|
|
void nsHTMLReflowState::AdjustComputedWidth(PRBool aAdjustForBoxSizing)
|
|
{
|
|
// only do the math if the width is not a symbolic value
|
|
if (mComputedWidth == NS_UNCONSTRAINEDSIZE) {
|
|
return;
|
|
}
|
|
|
|
NS_ASSERTION(mComputedWidth >= 0, "Negative Width Input - very bad");
|
|
|
|
// Factor in any minimum and maximum size information
|
|
if (mComputedWidth > mComputedMaxWidth) {
|
|
mComputedWidth = mComputedMaxWidth;
|
|
} else if (mComputedWidth < mComputedMinWidth) {
|
|
mComputedWidth = mComputedMinWidth;
|
|
}
|
|
|
|
if (aAdjustForBoxSizing) {
|
|
// remove extra padding/border if box-sizing property is set
|
|
switch (mStylePosition->mBoxSizing) {
|
|
case NS_STYLE_BOX_SIZING_PADDING : {
|
|
mComputedWidth -= mComputedPadding.left + mComputedPadding.right;
|
|
break;
|
|
}
|
|
case NS_STYLE_BOX_SIZING_BORDER : {
|
|
mComputedWidth -= mComputedBorderPadding.left + mComputedBorderPadding.right;
|
|
}
|
|
default : break;
|
|
}
|
|
|
|
// If it did go bozo because of too much border or padding, set to 0
|
|
if(mComputedWidth < 0) mComputedWidth = 0;
|
|
}
|
|
}
|
|
#ifdef IBMBIDI
|
|
PRBool
|
|
nsHTMLReflowState::IsBidiFormControl(nsIPresContext* aPresContext)
|
|
{
|
|
// This check is only necessary on visual bidi pages, because most
|
|
// visual pages use logical order for form controls so that they will
|
|
// display correctly on native widgets in OSs with Bidi support.
|
|
// So bail out if the page is not Bidi, or not visual, or if the pref is
|
|
// set to use visual order on forms in visual pages
|
|
if (!aPresContext->BidiEnabled()) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
if (!aPresContext->IsVisualMode()) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
PRUint32 options;
|
|
aPresContext->GetBidi(&options);
|
|
if (IBMBIDI_CONTROLSTEXTMODE_LOGICAL != GET_BIDI_OPTION_CONTROLSTEXTMODE(options)) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsIContent* content = frame->GetContent();
|
|
if (!content) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
// If this is a root reflow, we have to walk up the content tree to
|
|
// find out if the reflow root is a descendant of a form control.
|
|
// Otherwise, just test this content node
|
|
if (mReflowDepth == 0) {
|
|
for ( ; content; content = content->GetParent()) {
|
|
if (content->IsContentOfType(nsIContent::eHTML_FORM_CONTROL)) {
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
} else {
|
|
return (content->IsContentOfType(nsIContent::eHTML_FORM_CONTROL));
|
|
}
|
|
|
|
return PR_FALSE;
|
|
}
|
|
#endif
|