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Support revised first-letter layout

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This commit is contained in:
kipp@netscape.com
1999-04-27 22:10:51 +00:00
parent 76433ecb36
commit 0d165d6298
6 changed files with 936 additions and 78 deletions
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169
layout/generic/nsBlockFrame.cpp
View File

@@ -45,7 +45,6 @@
// XXX temporary for :first-letter support
#include "nsITextContent.h"
static NS_DEFINE_IID(kITextContentIID, NS_ITEXT_CONTENT_IID);/* XXX */
// XXX for IsEmptyLine
#include "nsTextFragment.h"
@@ -87,6 +86,10 @@ static NS_DEFINE_IID(kITextContentIID, NS_ITEXT_CONTENT_IID);/* XXX */
// Debugging support code
#ifdef DEBUG
static PRBool gShowDirtyLines = PR_FALSE;
#endif
#ifdef NOISY_INCREMENTAL_REFLOW
static PRInt32 gNoiseIndent;
static const char* kReflowCommandType[] = {
@@ -926,6 +929,9 @@ nsBlockFrame::List(FILE* out, PRInt32 aIndent) const
if (nsnull != view) {
fprintf(out, " [view=%p]", view);
}
if (nsnull != mNextSibling) {
fprintf(out, " next=%p", mNextSibling);
}
// Output the flow linkage
if (nsnull != mPrevInFlow) {
@@ -943,7 +949,7 @@ nsBlockFrame::List(FILE* out, PRInt32 aIndent) const
if (0 != mFlags) {
fprintf(out, " [flags=%x]", mFlags);
}
fputs("<\n", out);
fprintf(out, " sc=%p<\n", mStyleContext);
aIndent++;
// Output the lines
@@ -1128,6 +1134,7 @@ nsBlockFrame::Reflow(nsIPresContext& aPresContext,
case nsIReflowCommand::FrameAppended:
case nsIReflowCommand::FrameInserted:
case nsIReflowCommand::FrameRemoved:
NS_NOTREACHED("invalid reflow command");
break;
case nsIReflowCommand::StyleChanged:
rv = PrepareStyleChangedReflow(state);
@@ -1189,6 +1196,16 @@ nsBlockFrame::Reflow(nsIPresContext& aPresContext,
// Compute our final size
ComputeFinalSize(aReflowState, state, aMetrics);
#ifdef DEBUG
if (gShowDirtyLines && (eReflowReason_Resize == aReflowState.reason)) {
nsLineBox* line = mLines;
while (nsnull != line) {
line->ClearWasDirty();
line = line->mNext;
}
}
#endif
#ifdef NOISY_FINAL_SIZE
ListTag(stdout);
printf(": availSize=%d,%d computed=%d,%d metrics=%d,%d carriedMargin=%d\n",
@@ -1588,8 +1605,14 @@ nsresult
nsBlockFrame::PrepareStyleChangedReflow(nsBlockReflowState& aState)
{
UpdateBulletPosition();
// XXX temporary
return PrepareResizeReflow(aState);
// Mark everything dirty
nsLineBox* line = mLines;
while (nsnull != line) {
line->MarkDirty();
line = line->mNext;
}
return NS_OK;
}
nsresult
@@ -1908,6 +1931,10 @@ nsBlockFrame::ReflowLine(nsBlockReflowState& aState,
{
nsresult rv = NS_OK;
#ifdef DEBUG
aLine->MarkWasDirty();
#endif
// If the line is empty then first pull a frame into it so that we
// know what kind of line it is (block or inline).
if (0 == aLine->ChildCount()) {
@@ -2655,6 +2682,10 @@ nsBlockFrame::ReflowInlineFrames(nsBlockReflowState& aState,
availWidth, availHeight,
impactedByFloaters,
PR_FALSE /*XXX isTopOfPage*/);
if ((0 == lineLayout->GetLineNumber()) &&
(NS_BLOCK_HAS_FIRST_LETTER_STYLE & mState)) {
lineLayout->SetFirstLetterStyleOK(PR_TRUE);
}
// Reflow the frames that are already on the line first
PRUint8 lineReflowStatus = LINE_REFLOW_OK;
@@ -2773,6 +2804,12 @@ nsBlockFrame::ReflowInlineFrame(nsBlockReflowState& aState,
// If it's currently ok to be reflowing in first-letter style then
// we must be about to reflow a frame that has first-letter style.
PRBool reflowingFirstLetter = aState.mLineLayout->GetFirstLetterStyleOK();
#ifdef NOISY_FIRST_LETTER
ListTag(stdout);
printf(": reflowing ");
nsFrame::ListTag(stdout, aFrame);
printf(" reflowingFirstLetter=%s\n", reflowingFirstLetter ? "on" : "off");
#endif
// Reflow the inline frame
nsLineLayout* lineLayout = aState.mLineLayout;
@@ -2868,14 +2905,25 @@ nsBlockFrame::ReflowInlineFrame(nsBlockReflowState& aState,
return rv;
}
PRBool needSplit = PR_FALSE;
if (!reflowingFirstLetter) {
needSplit = PR_TRUE;
}
else {
// If we are reflowing the first letter frame then don't split the
// line and don't stop the line reflow...
PRBool splitLine = !reflowingFirstLetter;
if (reflowingFirstLetter) {
if (aLine->IsFirstLine()) {
splitLine = PR_TRUE;
}
else {
nsIAtom* frameType;
if (NS_SUCCEEDED(aFrame->GetFrameType(&frameType)) && frameType) {
if (frameType == nsLayoutAtoms::inlineFrame) {
splitLine = PR_TRUE;
}
NS_RELEASE(frameType);
}
}
}
if (needSplit) {
if (splitLine) {
// Split line after the current frame
*aLineReflowStatus = LINE_REFLOW_STOP;
aFrame->GetNextSibling(&aFrame);
@@ -2883,6 +2931,7 @@ nsBlockFrame::ReflowInlineFrame(nsBlockReflowState& aState,
if (NS_FAILED(rv)) {
return rv;
}
// Mark next line dirty in case SplitLine didn't end up
// pushing any frames.
nsLineBox* next = aLine->mNext;
@@ -3400,6 +3449,59 @@ nsBlockFrame::LastChild()
return nsnull;
}
#if 0
nsresult
nsBlockFrame::WrapFrameInFirstLetterFrame(nsIPresContext* aPresContext)
{
nsLineBox* line = mLines;
if (!line || line->IsBlock()) {
return NS_OK;
}
NS_ASSERTION(line->mChildCount > 0, "bad line count");
nsresult rv = NS_OK;
if (line->IsFirstLine()) {
// Delegate wrapping to the line frame
}
else if (line->mFirstChild) {
// Examine first frame on the line. If its text, then
nsIFrame* frame = line->mFirstChild;
nsIAtom* frameType;
frame->GetFrameType(&frameType);
if (frameType) {
if (frameType == nsLayoutAtoms::textFrame) {
// Time to rap. badda boom. :-)
nsIFrame* newFrame;
rv = NS_NewFirstLetterFrame(&newFrame);
if (NS_SUCCEEDED(rv)) {
// Give text frame to the new frame and then splice in the
// first-letter frame in its place.
nsIFrame* nextSib;
frame->GetNextSibling(&nextSib);
frame->SetNextSibling(nsnull);
line->mFirstChild = newFrame;
line->MarkDirty();
// Initialize the first-letter-frame.
rv = newFrame->Init(*aPresContext, mContent, this,
GetFirstLetterStyle(aPresContext), nsnull);
newFrame->SetInitialChildList(*aPresContext, nsnull, frame);
// See if the first-letter-frame should be floating, and if
// it is then create a placeholder for it.
}
}
else if (frameType == nsLayoutAtoms::inlineFrame) {
// Delegate wrapping to the inline frame
}
NS_RELEASE(frameType);
}
}
return rv;
}
#endif
nsresult
nsBlockFrame::WrapFramesInFirstLineFrame(nsIPresContext* aPresContext)
{
@@ -3738,6 +3840,13 @@ nsBlockFrame::AddFrames(nsIPresContext* aPresContext,
// We just added one or more frame(s) to the first line.
WrapFramesInFirstLineFrame(aPresContext);
}
#if 0
if ((NS_BLOCK_HAS_FIRST_LETTER_STYLE & mState) &&
(nsnull != mLines) && !mLines->IsBlock()) {
// We just added one or more frame(s) to the first line.
WrapFrameInFirstLetterFrame(aPresContext);
}
#endif
#ifdef DEBUG
VerifyLines(PR_TRUE);
@@ -4124,6 +4233,13 @@ nsBlockFrame::DoRemoveFrame(nsIPresContext* aPresContext,
// removed a block that preceeded the first line.
WrapFramesInFirstLineFrame(aPresContext);
}
#if 0
if ((NS_BLOCK_HAS_FIRST_LETTER_STYLE & mState) &&
(nsnull != mLines) && !mLines->IsBlock()) {
// We just added one or more frame(s) to the first line.
WrapFrameInFirstLetterFrame(aPresContext);
}
#endif
#ifdef DEBUG
VerifyLines(PR_TRUE);
@@ -4913,6 +5029,14 @@ nsBlockFrame::PaintChildren(nsIPresContext& aPresContext,
aWhichLayer);
kid->GetNextSibling(&kid);
}
#ifdef DEBUG
if (gShowDirtyLines) {
if (line->WasDirty()) {
aRenderingContext.SetColor(NS_RGB(128, 255, 128));
aRenderingContext.DrawRect(line->mBounds);
}
}
#endif
}
#ifdef NOISY_DAMAGE_REPAIR
else {
@@ -5054,6 +5178,16 @@ nsBlockFrame::Init(nsIPresContext& aPresContext,
return rv;
}
nsIStyleContext*
nsBlockFrame::GetFirstLetterStyle(nsIPresContext* aPresContext)
{
nsIStyleContext* fls;
aPresContext->ProbePseudoStyleContextFor(mContent,
nsHTMLAtoms::firstLetterPseudo,
mStyleContext, PR_FALSE, &fls);
return fls;
}
nsIStyleContext*
nsBlockFrame::GetFirstLineStyle(nsIPresContext* aPresContext)
{
@@ -5077,20 +5211,29 @@ nsBlockFrame::SetInitialChildList(nsIPresContext& aPresContext,
else {
// Lookup up the two pseudo style contexts
nsIStyleContext* firstLineStyle = nsnull;
if (nsnull == mPrevInFlow) {
firstLineStyle = GetFirstLineStyle(&aPresContext);
nsIStyleContext* firstLetterStyle = GetFirstLetterStyle(&aPresContext);
if (nsnull != firstLetterStyle) {
mState |= NS_BLOCK_HAS_FIRST_LETTER_STYLE;
#ifdef NOISY_FIRST_LETTER
ListTag(stdout);
printf(": first-letter style found\n");
#endif
NS_RELEASE(firstLetterStyle);
}
nsIStyleContext* firstLineStyle = GetFirstLineStyle(&aPresContext);
if (nsnull != firstLineStyle) {
mState |= NS_BLOCK_HAS_FIRST_LINE_STYLE;
#ifdef NOISY_FIRST_LINE
ListTag(stdout);
printf(": first-line style found\n");
#endif
NS_RELEASE(firstLineStyle);
}
}
rv = AddFrames(&aPresContext, aChildList, nsnull);
NS_IF_RELEASE(firstLineStyle);
if (NS_FAILED(rv)) {
return rv;
}