/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1998
* Netscape Communications Corporation. All Rights Reserved.
*/
#include "nsBlockFrame.h"
#include "nsBlockReflowContext.h"
#include "nsBlockBandData.h"
#include "nsBulletFrame.h"
#include "nsLineBox.h"
#include "nsFrameReflowState.h"
#include "nsLineLayout.h"
#include "nsInlineReflow.h"
#include "nsPlaceholderFrame.h"
#include "nsStyleConsts.h"
#include "nsHTMLIIDs.h"
#include "nsCSSRendering.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIReflowCommand.h"
#include "nsISpaceManager.h"
#include "nsIStyleContext.h"
#include "nsIView.h"
#include "nsIFontMetrics.h"
#include "nsHTMLParts.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLValue.h"
#include "nsDOMEvent.h"
#include "nsIHTMLContent.h"
#include "prprf.h"
#include "nsLayoutAtoms.h"
// 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"
// XXX TODO:
// If I can add in IsAPlaceHolder then we can remove the mFloaters
// void array from the nsLineBox
#ifdef NS_DEBUG
#undef NOISY_FIRST_LINE
#undef REALLY_NOISY_FIRST_LINE
#undef NOISY_FIRST_LETTER
#undef NOISY_MAX_ELEMENT_SIZE
#undef NOISY_RUNIN
#undef NOISY_FLOATER_CLEARING
#undef NOISY_INCREMENTAL_REFLOW
#undef REFLOW_STATUS_COVERAGE
#else
#undef NOISY_FIRST_LINE
#undef REALLY_NOISY_FIRST_LINE
#undef NOISY_FIRST_LETTER
#undef NOISY_MAX_ELEMENT_SIZE
#undef NOISY_RUNIN
#undef NOISY_FLOATER_CLEARING
#undef NOISY_INCREMENTAL_REFLOW
#undef REFLOW_STATUS_COVERAGE
#endif
//----------------------------------------------------------------------
// Debugging support code
#ifdef NOISY_INCREMENTAL_REFLOW
static PRInt32 gNoiseIndent;
static const char* kReflowCommandType[] = {
"FrameAppended",
"FrameInserted",
"FrameRemoved",
"ContentChanged",
"StyleChanged",
"PullupReflow",
"PushReflow",
"CheckPullupReflow",
"UserDefined",
};
#endif
#ifdef REALLY_NOISY_FIRST_LINE
static void
DumpStyleGeneaology(nsIFrame* aFrame, const char* gap)
{
fputs(gap, stdout);
aFrame->ListTag(stdout);
fputs(name, out);
printf(": ");
nsIStyleContext* sc;
aFrame->GetStyleContext(sc);
while (nsnull != sc) {
nsIStyleContext* psc;
printf("%p ", sc);
psc = sc->GetParent();
NS_RELEASE(sc);
sc = psc;
}
printf("\n");
}
#endif
#ifdef NS_DEBUG
static void
VerifyLineLength(nsLineBox* aLine)
{
nsIFrame* frame = aLine->mFirstChild;
PRInt32 n = aLine->mChildCount;
while (--n >= 0) {
frame->GetNextSibling(frame);
}
}
#endif
#ifdef REFLOW_STATUS_COVERAGE
static void
RecordReflowStatus(PRBool aChildIsBlock, nsReflowStatus aFrameReflowStatus)
{
static PRUint32 record[2];
// 0: child-is-block
// 1: child-is-inline
PRIntn index = 0;
if (!aChildIsBlock) index |= 1;
// Compute new status
PRUint32 newS = record[index];
if (NS_INLINE_IS_BREAK(aFrameReflowStatus)) {
if (NS_INLINE_IS_BREAK_BEFORE(aFrameReflowStatus)) {
newS |= 1;
}
else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
newS |= 2;
}
else {
newS |= 4;
}
}
else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
newS |= 8;
}
else {
newS |= 16;
}
// Log updates to the status that yield different values
if (record[index] != newS) {
record[index] = newS;
printf("record(%d): %02x %02x\n", index, record[0], record[1]);
}
}
#endif
//----------------------------------------------------------------------
class nsBlockReflowState : public nsFrameReflowState {
public:
nsBlockReflowState(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
const nsHTMLReflowMetrics& aMetrics,
nsLineLayout* aLineLayout);
~nsBlockReflowState();
/**
* Update the mCurrentBand data based on the current mY position.
*/
void GetAvailableSpace();
void InitFloater(nsPlaceholderFrame* aPlaceholderFrame);
void AddFloater(nsPlaceholderFrame* aPlaceholderFrame,
PRBool aInitialReflow);
void PlaceFloater(nsPlaceholderFrame* aFloater, PRBool& aIsLeftFloater);
void PlaceBelowCurrentLineFloaters(nsVoidArray* aFloaters);
void PlaceCurrentLineFloaters(nsVoidArray* aFloaters);
void ClearFloaters(nscoord aY, PRUint8 aBreakType);
PRBool IsLeftMostChild(nsIFrame* aFrame);
PRBool IsAdjacentWithTop() const {
return mY == mBorderPadding.top;
}
PRBool ShouldApplyTopMargin() const {
return mIsMarginRoot || !IsAdjacentWithTop();
}
nsLineLayout* mLineLayout;
nsInlineReflow* mInlineReflow;
nsISpaceManager* mSpaceManager;
nscoord mSpaceManagerX, mSpaceManagerY;
nsBlockFrame* mBlock;
nsBlockFrame* mNextInFlow;
nsReflowStatus mReflowStatus;
nsBlockFrame* mRunInFromFrame;
nsBlockFrame* mRunInToFrame;
PRUint8 mTextAlign;
PRUintn mPrevMarginFlags;
nscoord mBottomEdge; // maximum Y
PRBool mUnconstrainedWidth;
PRBool mUnconstrainedHeight;
nscoord mY;
nscoord mKidXMost;
nscoord mAscent, mDescent;
// Previous child. This is used when pulling up a frame to update
// the sibling list.
nsIFrame* mPrevChild;
nsVoidArray mPendingFloaters;
nsLineBox* mCurrentLine;
nsLineBox* mPrevLine;
// The next list ordinal for counting list bullets
PRInt32 mNextListOrdinal;
nsBlockBandData mCurrentBand;
nsRect mAvailSpaceRect;
};
// XXX This is vile. Make it go away
void
nsLineLayout::InitFloater(nsPlaceholderFrame* aFrame)
{
mBlockReflowState->InitFloater(aFrame);
}
void
nsLineLayout::AddFloater(nsPlaceholderFrame* aFrame)
{
mBlockReflowState->AddFloater(aFrame, PR_FALSE);
}
//----------------------------------------------------------------------
nsBlockReflowState::nsBlockReflowState(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
const nsHTMLReflowMetrics& aMetrics,
nsLineLayout* aLineLayout)
: nsFrameReflowState(aPresContext, aReflowState, aMetrics)
{
mInlineReflow = nsnull;
mLineLayout = aLineLayout;
mSpaceManager = aReflowState.spaceManager;
// Translate into our content area and then save the
// coordinate system origin for later.
mSpaceManager->Translate(mBorderPadding.left, mBorderPadding.top);
mSpaceManager->GetTranslation(mSpaceManagerX, mSpaceManagerY);
mReflowStatus = NS_FRAME_COMPLETE;
mPresContext = aPresContext;
mBlock = (nsBlockFrame*) frame;
mBlock->GetNextInFlow((nsIFrame*&)mNextInFlow);
mKidXMost = 0;
mRunInFromFrame = nsnull;
mRunInToFrame = nsnull;
mY = mAscent = mDescent = 0;
mUnconstrainedWidth = availableWidth == NS_UNCONSTRAINEDSIZE;
mUnconstrainedHeight = availableHeight == NS_UNCONSTRAINEDSIZE;
#ifdef NS_DEBUG
if (!mUnconstrainedWidth && (availableWidth > 100000)) {
mBlock->ListTag(stdout);
printf(": bad parent: maxSize WAS %d,%d\n", availableWidth, availableHeight);
if (availableWidth > 100000) {
availableWidth = NS_UNCONSTRAINEDSIZE;
mUnconstrainedWidth = PR_TRUE;
}
}
if (!mUnconstrainedHeight && (availableHeight > 100000)) {
mBlock->ListTag(stdout);
printf(": bad parent: maxSize WAS %d,%d\n", availableWidth, availableHeight);
if (availableHeight > 100000) {
availableHeight = NS_UNCONSTRAINEDSIZE;
mUnconstrainedHeight = PR_TRUE;
}
}
#endif
mTextAlign = mStyleText->mTextAlign;
nscoord lr = mBorderPadding.left + mBorderPadding.right;
mY = mBorderPadding.top;
if (HaveFixedContentWidth()) {
// The CSS2 spec says that the width attribute defines the width
// of the "content area" which does not include the border
// padding. So we add those back in.
mBorderArea.width = computedWidth + lr;
mContentArea.width = computedWidth;
}
else {
if (mUnconstrainedWidth) {
mBorderArea.width = NS_UNCONSTRAINEDSIZE;
mContentArea.width = NS_UNCONSTRAINEDSIZE;
}
else {
mBorderArea.width = availableWidth;
mContentArea.width = availableWidth - lr;
}
}
mBorderArea.height = availableHeight;
mContentArea.height = availableHeight;
mBottomEdge = availableHeight;
if (!mUnconstrainedHeight) {
mBottomEdge -= mBorderPadding.bottom;
}
mCurrentBand.Init(mSpaceManager, mContentArea);
mPrevChild = nsnull;
mCurrentLine = nsnull;
mPrevLine = nsnull;
}
nsBlockReflowState::~nsBlockReflowState()
{
// Restore the coordinate system
mSpaceManager->Translate(-mBorderPadding.left, -mBorderPadding.top);
}
// Get the available reflow space for the current y coordinate. The
// available space is relative to our coordinate system (0,0) is our
// upper left corner.
void
nsBlockReflowState::GetAvailableSpace()
{
nsISpaceManager* sm = mSpaceManager;
#ifdef NS_DEBUG
// Verify that the caller setup the coordinate system properly
nscoord wx, wy;
sm->GetTranslation(wx, wy);
NS_ASSERTION((wx == mSpaceManagerX) && (wy == mSpaceManagerY),
"bad coord system");
#endif
mCurrentBand.GetAvailableSpace(mY - mBorderPadding.top, mAvailSpaceRect);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("nsBlockReflowState::GetAvailableSpace: band={%d,%d,%d,%d} count=%d",
mAvailSpaceRect.x, mAvailSpaceRect.y,
mAvailSpaceRect.width, mAvailSpaceRect.height,
mCurrentBand.GetTrapezoidCount()));
#ifdef NOISY_INCREMENTAL_REFLOW
if (reason == eReflowReason_Incremental) {
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("GetAvailableSpace: band=%d,%d,%d,%d count=%d\n",
mAvailSpaceRect.x, mAvailSpaceRect.y,
mAvailSpaceRect.width, mAvailSpaceRect.height,
mCurrentBand.GetTrapezoidCount());
}
#endif
}
//----------------------------------------------------------------------
#define NS_BLOCK_FRAME_CID \
{ 0xa6cf90df, 0x15b3, 0x11d2,{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
static const nsIID kBlockFrameCID = NS_BLOCK_FRAME_CID;
nsresult
NS_NewBlockFrame(nsIFrame*& aNewFrame, PRUint32 aFlags)
{
nsBlockFrame* it = new nsBlockFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
it->SetFlags(aFlags);
aNewFrame = it;
return NS_OK;
}
nsBlockFrame::nsBlockFrame()
{
}
nsBlockFrame::~nsBlockFrame()
{
NS_IF_RELEASE(mFirstLineStyle);
NS_IF_RELEASE(mFirstLetterStyle);
nsTextRun::DeleteTextRuns(mTextRuns);
}
NS_IMETHODIMP
nsBlockFrame::DeleteFrame(nsIPresContext& aPresContext)
{
nsLineBox::DeleteLineList(aPresContext, mLines);
nsLineBox::DeleteLineList(aPresContext, mOverflowLines);
// When we have a bullet frame and it's not in our child list then
// we need to delete it ourselves (this is the common case for
// list-item's that have outside bullets).
if ((nsnull != mBullet) &&
((nsnull == mLines) || (mBullet != mLines->mFirstChild))) {
mBullet->DeleteFrame(aPresContext);
mBullet = nsnull;
}
mFloaters.DeleteFrames(aPresContext);
return nsBlockFrameSuper::DeleteFrame(aPresContext);
}
NS_IMETHODIMP
nsBlockFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kBlockFrameCID)) {
nsBlockFrame* tmp = this;
*aInstancePtr = (void*) tmp;
return NS_OK;
}
return nsBlockFrameSuper::QueryInterface(aIID, aInstancePtr);
}
static nsresult
ReResolveLineList(nsIPresContext* aPresContext,
nsLineBox* aLine,
nsIStyleContext* aStyleContext)
{
nsresult rv = NS_OK;
while (nsnull != aLine) {
nsIFrame* child = aLine->mFirstChild;
PRInt32 n = aLine->mChildCount;
while ((--n >= 0) && NS_SUCCEEDED(rv)) {
rv = child->ReResolveStyleContext(aPresContext, aStyleContext);
child->GetNextSibling(child);
}
aLine = aLine->mNext;
}
return rv;
}
NS_IMETHODIMP
nsBlockFrame::ReResolveStyleContext(nsIPresContext* aPresContext,
nsIStyleContext* aParentContext)
{
nsIStyleContext* oldContext = mStyleContext;
// NOTE: using nsFrame's ReResolveStyleContext method to avoid
// useless version in base classes.
nsresult rv = nsFrame::ReResolveStyleContext(aPresContext, aParentContext);
if (NS_FAILED(rv)) {
return rv;
}
if (oldContext != mStyleContext) {
// Re-resolve the :first-line pseudo style context
if (nsnull == mPrevInFlow) {
nsIStyleContext* newFirstLineStyle =
aPresContext->ProbePseudoStyleContextFor(mContent,
nsHTMLAtoms::firstLinePseudo,
mStyleContext);
if (newFirstLineStyle != mFirstLineStyle) {
NS_IF_RELEASE(mFirstLineStyle);
mFirstLineStyle = newFirstLineStyle;
}
else {
NS_IF_RELEASE(newFirstLineStyle);
}
// Re-resolve the :first-letter pseudo style context
nsIStyleContext* newFirstLetterStyle =
aPresContext->ProbePseudoStyleContextFor(mContent,
nsHTMLAtoms::firstLetterPseudo,
(nsnull != mFirstLineStyle
? mFirstLineStyle
: mStyleContext));
if (newFirstLetterStyle != mFirstLetterStyle) {
NS_IF_RELEASE(mFirstLetterStyle);
mFirstLetterStyle = newFirstLetterStyle;
}
else {
NS_IF_RELEASE(newFirstLetterStyle);
}
}
// Update the child frames on each line
nsLineBox* line = mLines;
while (nsnull != line) {
nsIFrame* child = line->mFirstChild;
PRInt32 n = line->mChildCount;
while ((--n >= 0) && NS_SUCCEEDED(rv)) {
if (line == mLines) {
rv = child->ReResolveStyleContext(aPresContext,
(nsnull != mFirstLineStyle
? mFirstLineStyle
: mStyleContext));
}
else {
rv = child->ReResolveStyleContext(aPresContext, mStyleContext);
}
child->GetNextSibling(child);
}
line = line->mNext;
}
if (NS_SUCCEEDED(rv) && (nsnull != mOverflowLines)) {
rv = ReResolveLineList(aPresContext, mOverflowLines, mStyleContext);
}
if (NS_SUCCEEDED(rv) && (nsnull != mPrevInFlow)) {
nsLineBox* lines = ((nsBlockFrame*)mPrevInFlow)->mOverflowLines;
if (nsnull != lines) {
rv = ReResolveLineList(aPresContext, lines, mStyleContext);
}
}
}
return rv;
}
NS_IMETHODIMP
nsBlockFrame::IsSplittable(nsSplittableType& aIsSplittable) const
{
aIsSplittable = NS_FRAME_SPLITTABLE_NON_RECTANGULAR;
return NS_OK;
}
static void
ListTextRuns(FILE* out, PRInt32 aIndent, nsTextRun* aRuns)
{
while (nsnull != aRuns) {
aRuns->List(out, aIndent);
aRuns = aRuns->GetNext();
}
}
NS_METHOD
nsBlockFrame::List(FILE* out, PRInt32 aIndent) const
{
PRInt32 i;
nsAutoString tagString;
if (nsnull != mContent) {
nsIAtom* tag;
mContent->GetTag(tag);
if (tag != nsnull) {
tag->ToString(tagString);
NS_RELEASE(tag);
}
}
// Indent
for (i = aIndent; --i >= 0; ) fputs(" ", out);
// Output the tag
ListTag(out);
nsIView* view;
GetView(&view);
if (nsnull != view) {
fprintf(out, " [view=%p]", view);
}
// Output the flow linkage
if (nsnull != mPrevInFlow) {
fprintf(out, " prev-in-flow=%p", mPrevInFlow);
}
if (nsnull != mNextInFlow) {
fprintf(out, " next-in-flow=%p", mNextInFlow);
}
// Output the rect and state
out << mRect;
if (0 != mState) {
fprintf(out, " [state=%08x]", mState);
}
fputs("<\n", out);
aIndent++;
// Output the lines
if (nsnull != mLines) {
nsLineBox* line = mLines;
while (nsnull != line) {
line->List(out, aIndent);
line = line->mNext;
}
}
nsIAtom* listName = nsnull;
PRInt32 listIndex = 0;
for (;;) {
nsIFrame* kid;
GetAdditionalChildListName(listIndex++, &listName);
if (nsnull == listName) {
break;
}
FirstChild(listName, &kid);
if (nsnull != kid) {
IndentBy(out, aIndent);
nsAutoString tmp;
if (nsnull != listName) {
listName->ToString(tmp);
fputs(tmp, out);
}
fputs("<\n", out);
while (nsnull != kid) {
kid->List(out, aIndent + 1);
kid->GetNextSibling(kid);
}
IndentBy(out, aIndent);
fputs(">\n", out);
}
NS_IF_RELEASE(listName);
}
// Output the text-runs
if (nsnull != mTextRuns) {
for (i = aIndent; --i >= 0; ) fputs(" ", out);
fputs("text-runs <\n", out);
ListTextRuns(out, aIndent + 1, mTextRuns);
for (i = aIndent; --i >= 0; ) fputs(" ", out);
fputs(">\n", out);
}
aIndent--;
for (i = aIndent; --i >= 0; ) fputs(" ", out);
fputs(">\n", out);
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("Block", aResult);
}
/////////////////////////////////////////////////////////////////////////////
// Child frame enumeration
NS_IMETHODIMP
nsBlockFrame::FirstChild(nsIAtom* aListName, nsIFrame** aFirstChild) const
{
NS_PRECONDITION(nsnull != aFirstChild, "null OUT parameter pointer");
if (nsnull == aListName) {
*aFirstChild = (nsnull != mLines) ? mLines->mFirstChild : nsnull;
return NS_OK;
}
else if (aListName == nsLayoutAtoms::floaterList) {
*aFirstChild = mFloaters.FirstChild();
return NS_OK;
}
else if (aListName == nsLayoutAtoms::bulletList) {
*aFirstChild = mBullet;
return NS_OK;
}
*aFirstChild = nsnull;
return NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP
nsBlockFrame::GetAdditionalChildListName(PRInt32 aIndex,
nsIAtom** aListName) const
{
NS_PRECONDITION(nsnull != aListName, "null OUT parameter pointer");
if (aIndex < 0) {
return NS_ERROR_INVALID_ARG;
}
*aListName = nsnull;
switch (aIndex) {
case NS_BLOCK_FRAME_FLOATER_LIST_INDEX:
*aListName = nsLayoutAtoms::floaterList;
NS_ADDREF(*aListName);
break;
case NS_BLOCK_FRAME_BULLET_LIST_INDEX:
*aListName = nsLayoutAtoms::bulletList;
NS_ADDREF(*aListName);
break;
}
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::IsPercentageBase(PRBool& aBase) const
{
aBase = PR_TRUE;
return NS_OK;
}
//////////////////////////////////////////////////////////////////////
// Frame structure methods
//////////////////////////////////////////////////////////////////////
// Reflow methods
#if 0
NS_IMETHODIMP
nsBlockFrame::ComputeCollapsedMargins(nsIPresContext& aPresContext,
const nsReflowState* aParentReflowState,
nscoord* aTopMarginResult,
nscoord* aBottomMarginResult)
{
NS_PRECONDITION((nsnull != aTopMarginResult) &&
(nsnull != aBottomMarginResult), "null ptr");
if ((nsnull != aTopMarginResult) || (nsnull != aBottomMarginResult)) {
nsMargin myMargin(0, 0, 0, 0);
if (0 == (BLOCK_IS_INLINE & mFlags)) {
nsHTMLReflowState::ComputeMarginFor(this, aParentReflowState, myMargin);
}
// Find the first appropriate line (skipping over an empty line if
// present) that contains a block that can be used for a
// parent-child margin collapse.
nsLineBox* firstLine = nsnull;
nscoord firstLineTopMargin = 0;
if (nsnull != aTopMarginResult) {
nsLineBox* line = mLines;
if (nsnull != line) {
if (line->IsEmptyLine()) {
line = line->mNext;
}
if ((nsnull != line) && line->IsBlock()) {
firstLine = line;
}
}
}
// Find the last appropriate line (skipping over an empty line)...
nsLineBox* lastLine = nsnull;
nscoord lastLineBottomMargin = 0;
if (nsnull != aBottomMarginResult) {
// Find the last line (line) and the previous to the last line
// (prevLine)
nsLineBox* line = mLines;
nsLineBox* prevLine = nsnull;
while (nsnull != line) {
nsLineBox* next = line->mNext;
if (nsnull == next) {
break;
}
prevLine = line;
line = next;
}
if (nsnull != line) {
if (line->IsEmptyLine()) {
line = prevLine;
}
if ((nsnull != line) && line->IsBlock()) {
lastLine = line;
}
}
}
if (nsnull != firstLine) {
if (lastLine == firstLine) {
ComputeCollapsedMargins(aPresContext, nsnull,
&firstLineTopMargin,
&lastLineBottomMargin);
}
else {
ComputeCollapsedMargins(aPresContext, nsnull,
&firstLineTopMargin,
nsnull);
}
firstLineTopMargin
}
else if (nsnull != lastLine) {
ComputeCollapsedMargins(aPresContext, nsnull,
nsnull,
&lastLineBottomMargin);
}
if ((nsnull != aTopMarginResult) && (nsnull != aBottomMarginResult)) {
nscoord topMargin =
nsBlockReflowContext::MaxMargin(myMargin.top, firstLineTopMargin);
*aTopMarginResult = topMargin;
nscoord bottomMargin =
nsBlockReflowContext::MaxMargin(myMargin.bottom, lastLineBottomMargin);
*aBottomMarginResult = bottomMargin;
}
else if (nsnull != aTopMarginResult) {
nscoord topMargin =
nsBlockReflowContext::MaxMargin(myMargin.top, firstLineTopMargin);
*aTopMarginResult = topMargin;
}
else {
nscoord bottomMargin =
nsBlockReflowContext::MaxMargin(myMargin.bottom, lastLineBottomMargin);
*aBottomMarginResult = bottomMargin;
}
}
return NS_OK;
}
#endif
NS_IMETHODIMP
nsBlockFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter nsBlockFrame::Reflow: maxSize=%d,%d reason=%d",
aReflowState.availableWidth,
aReflowState.availableHeight,
aReflowState.reason));
// Replace parent provided reflow state with our own significantly
// more extensive version.
nsLineLayout ll(aPresContext, aReflowState.spaceManager);
nsLineLayout* lineLayout = ≪
nsBlockReflowState state(aPresContext, aReflowState, aMetrics, lineLayout);
if (NS_BLOCK_MARGIN_ROOT & mFlags) {
state.mIsMarginRoot = PR_TRUE;
}
lineLayout->Init(&state);
// Prepare inline-reflow engine
nsInlineReflow inlineReflow(*lineLayout, state, this, PR_TRUE);
state.mInlineReflow = &inlineReflow;
lineLayout->PushInline(&inlineReflow);
nsresult rv = NS_OK;
nsIFrame* target;
switch (state.reason) {
case eReflowReason_Initial:
rv = PrepareInitialReflow(state);
mState &= ~NS_FRAME_FIRST_REFLOW;
break;
case eReflowReason_Incremental:
state.reflowCommand->GetTarget(target);
if (this == target) {
nsIReflowCommand::ReflowType type;
state.reflowCommand->GetType(type);
switch (type) {
case nsIReflowCommand::FrameAppended:
rv = PrepareFrameAppendedReflow(state);
break;
case nsIReflowCommand::FrameInserted:
rv = PrepareFrameInsertedReflow(state);
break;
case nsIReflowCommand::FrameRemoved:
rv = PrepareFrameRemovedReflow(state);
break;
case nsIReflowCommand::StyleChanged:
rv = PrepareStyleChangedReflow(state);
break;
case nsIReflowCommand::ReflowDirty:
break;
default:
// Map any other incremental operations into full reflows
rv = PrepareResizeReflow(state);
break;
}
}
else {
// Get next frame in reflow command chain
state.reflowCommand->GetNext(state.mNextRCFrame);
// Now do the reflow
rv = PrepareChildIncrementalReflow(state);
}
break;
case eReflowReason_Resize:
default:
DrainOverflowLines();
rv = PrepareResizeReflow(state);
break;
}
// Now reflow...
rv = ReflowDirtyLines(state);
aStatus = state.mReflowStatus;
// XXX get rid of this!
BuildFloaterList();
// Compute our final size
ComputeFinalSize(state, aMetrics);
lineLayout->PopInline();
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("exit nsBlockFrame::Reflow: size=%d,%d reflowStatus=%d rv=%x",
aMetrics.width, aMetrics.height, aStatus, rv));
return rv;
}
// XXX make this virtual
// XXX factor into its component pieces
void
nsBlockFrame::ComputeFinalSize(nsBlockReflowState& aState,
nsHTMLReflowMetrics& aMetrics)
{
// XXX handle floater problems this way...
PRBool isFixedWidth = aState.HaveFixedContentWidth();
PRBool isFixedHeight = aState.HaveFixedContentHeight();
#if 0
if (NS_BODY_SHRINK_WRAP & mFlags) {
isFixedWidth = PR_FALSE;
isFixedHeight = PR_FALSE;
}
#endif
// Compute final width
if (isFixedWidth) {
// Use style defined width
aMetrics.width = aState.mBorderPadding.left + aState.computedWidth +
aState.mBorderPadding.right;
}
else {
nscoord computedWidth = aState.mKidXMost + aState.mBorderPadding.right;
PRBool compact = PR_FALSE;
if (NS_STYLE_DISPLAY_COMPACT == aState.mStyleDisplay->mDisplay) {
// If we are display: compact AND we have no lines or we have
// exactly one line and that line is not a block line AND that
// line doesn't end in a BR of any sort THEN we remain a compact
// frame.
if ((nsnull == mLines) ||
((nsnull == mLines->mNext) && !mLines->IsBlock() &&
(NS_STYLE_CLEAR_NONE == mLines->mBreakType) &&
(computedWidth <= aState.mCompactMarginWidth))) {
compact = PR_TRUE;
}
}
// There are two options here. We either shrink wrap around our
// contents or we fluff out to the maximum available width. Note:
// We always shrink wrap when given an unconstrained width.
if ((0 == (NS_BLOCK_SHRINK_WRAP & mFlags)) &&
!aState.mUnconstrainedWidth &&
!compact) {
// Fluff out to the max width if we aren't already that wide
if (computedWidth < aState.availableWidth) {
computedWidth = aState.availableWidth;
}
}
aMetrics.width = computedWidth;
}
// Compute final height
if (isFixedHeight) {
// Use style defined height
aMetrics.height = aState.mBorderPadding.top + aState.computedHeight +
aState.mBorderPadding.bottom;
}
else {
// Shrink wrap our height around our contents.
if (aState.mIsMarginRoot) {
// When we are a margin root make sure that our last childs
// bottom margin is fully applied.
// XXX check for a fit
aState.mY += aState.mPrevBottomMargin;
}
aState.mY += aState.mBorderPadding.bottom;
aMetrics.height = aState.mY;
}
// Return top and bottom margin information
if (aState.mIsMarginRoot) {
aMetrics.mCarriedOutTopMargin = 0;
aMetrics.mCarriedOutBottomMargin = 0;
}
else {
aMetrics.mCarriedOutTopMargin = aState.mCarriedOutTopMargin;
aMetrics.mCarriedOutBottomMargin = aState.mPrevBottomMargin;
}
// Special check for zero sized content: If our content is zero
// sized then we collapse into nothingness.
PRBool emptyFrame = PR_FALSE;
// We need to check the specified width and see if it's 'auto'
const nsStylePosition* position;
aState.frame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&) position);
PRIntn specifiedWidthUnit = position->mWidth.GetUnit();
if ((eStyleUnit_Auto == specifiedWidthUnit) &&
(NS_AUTOHEIGHT == aState.computedHeight) &&
((0 == aState.mKidXMost - aState.mBorderPadding.left) &&
(0 == aState.mY - aState.mBorderPadding.top))) {
aMetrics.width = 0;
aMetrics.height = 0;
aState.mAscent = 0;
aState.mDescent = 0;
emptyFrame = PR_TRUE;
}
aMetrics.ascent = aMetrics.height;
aMetrics.descent = 0;
if (aState.mComputeMaxElementSize) {
nscoord maxWidth, maxHeight;
if (emptyFrame) {
// When a frame is empty it must not provide any
// max-element-size information.
maxWidth = maxHeight = 0;
}
else {
if (aState.mNoWrap) {
// When no-wrap is true the max-element-size.width is the
// width of the widest line plus the right border. Note that
// aState.mKidXMost already has the left border factored into
// it
maxWidth = aState.mKidXMost + aState.mBorderPadding.right;
}
else {
// Add in border and padding dimensions to already computed
// max-element-size values.
maxWidth = aState.mMaxElementSize.width +
aState.mBorderPadding.left + aState.mBorderPadding.right;
}
maxHeight = aState.mMaxElementSize.height +
aState.mBorderPadding.top + aState.mBorderPadding.bottom;
}
// Store away the final value
aMetrics.maxElementSize->width = maxWidth;
aMetrics.maxElementSize->height = maxHeight;
#ifdef NOISY_MAX_ELEMENT_SIZE
ListTag(stdout);
printf(": max-element-size:%d,%d desired:%d,%d maxSize:%d,%d\n",
maxWidth, maxHeight, aMetrics.width, aMetrics.height,
aState.availableWidth, aState.availableHeight);
#endif
}
// Compute the combined area of our children
// XXX take into account the overflow->clip property!
nscoord x0 = 0, y0 = 0, x1 = aMetrics.width, y1 = aMetrics.height;
nsLineBox* line = mLines;
while (nsnull != line) {
// Compute min and max x/y values for the reflowed frame's
// combined areas
nscoord x = line->mCombinedArea.x;
nscoord y = line->mCombinedArea.y;
nscoord xmost = x + line->mCombinedArea.width;
nscoord ymost = y + line->mCombinedArea.height;
if (x < x0) x0 = x;
if (xmost > x1) x1 = xmost;
if (y < y0) y0 = y;
if (ymost > y1) y1 = ymost;
// If the line has floaters, factor those in as well
nsVoidArray* floaters = line->mFloaters;
if (nsnull != floaters) {
PRInt32 i, n = floaters->Count();
for (i = 0; i < n; i++) {
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) floaters->ElementAt(i);
nsIFrame* frame = ph->GetAnchoredItem();
// XXX This is wrong! The floater may have a combined area
// that exceeds its bounding box!
nsRect r;
frame->GetRect(r);
if (r.x < x0) x0 = r.x;
if (r.XMost() > x1) x1 = r.XMost();
if (r.y < y0) y0 = r.y;
if (r.YMost() > y1) y1 = r.YMost();
}
}
line = line->mNext;
}
aMetrics.mCombinedArea.x = x0;
aMetrics.mCombinedArea.y = y0;
aMetrics.mCombinedArea.width = x1 - x0;
aMetrics.mCombinedArea.height = y1 - y0;
if (nsnull != mBullet) {
nsRect r;
mBullet->GetRect(r);
nscoord x0 = aMetrics.mCombinedArea.x;
nscoord y0 = aMetrics.mCombinedArea.y;
nscoord x1 = x0 + aMetrics.mCombinedArea.width;
nscoord y1 = y0 + aMetrics.mCombinedArea.height;
if (r.x < x0) x0 = r.x;
if (r.XMost() > x1) x1 = r.XMost();
if (r.y < y0) y0 = r.y;
if (r.YMost() > y1) y1 = r.YMost();
aMetrics.mCombinedArea.x = x0;
aMetrics.mCombinedArea.y = y0;
aMetrics.mCombinedArea.width = x1 - x0;
aMetrics.mCombinedArea.height = y1 - y0;
// If the combined area of our children exceeds our bounding box
// then set the NS_FRAME_OUTSIDE_CHILDREN flag, otherwise clear it.
if ((aMetrics.mCombinedArea.x < 0) ||
(aMetrics.mCombinedArea.y < 0) ||
(aMetrics.mCombinedArea.XMost() > aMetrics.width) ||
(aMetrics.mCombinedArea.YMost() > aMetrics.height)) {
mState |= NS_FRAME_OUTSIDE_CHILDREN;
}
else {
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
}
}
// If the combined area of our children exceeds our bounding box
// then set the NS_FRAME_OUTSIDE_CHILDREN flag, otherwise clear it.
if ((aMetrics.mCombinedArea.x < 0) ||
(aMetrics.mCombinedArea.y < 0) ||
(aMetrics.mCombinedArea.XMost() > aMetrics.width) ||
(aMetrics.mCombinedArea.YMost() > aMetrics.height)) {
mState |= NS_FRAME_OUTSIDE_CHILDREN;
}
else {
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
}
#if XXX
ListTag(stdout);
printf(": => carried=%d,%d\n", aMetrics.mCarriedOutTopMargin, aMetrics.mCarriedOutBottomMargin);
#endif
}
nsresult
nsBlockFrame::PrepareInitialReflow(nsBlockReflowState& aState)
{
if ((nsnull == mPrevInFlow) && (nsnull != aState.mRunInFrame)) {
#ifdef NOISY_RUNIN
ListTag(stdout);
printf(": run-in from: ");
aReflowState.mRunInFrame->ListTag(stdout);
printf("\n");
#endif
// Take frames away from the run-in frame
TakeRunInFrames(aState.mRunInFrame);
}
DrainOverflowLines();
PrepareResizeReflow(aState);
ComputeTextRuns(aState);
RenumberLists(aState);
return NS_OK;
}
//XXX gotta go
nsresult
nsBlockFrame::PrepareFrameAppendedReflow(nsBlockReflowState& aState)
{
RenumberLists(aState);
nsresult rv = ComputeTextRuns(aState);
return rv;
}
//XXX gotta go
nsresult
nsBlockFrame::PrepareFrameInsertedReflow(nsBlockReflowState& aState)
{
nsresult rv = PrepareResizeReflow(aState);
RenumberLists(aState);
rv = ComputeTextRuns(aState);
return rv;
}
//XXX gotta go
nsresult
nsBlockFrame::PrepareFrameRemovedReflow(nsBlockReflowState& aState)
{
nsresult rv = PrepareResizeReflow(aState);
RenumberLists(aState);
rv = ComputeTextRuns(aState);
return rv;
}
nsresult
nsBlockFrame::PrepareChildIncrementalReflow(nsBlockReflowState& aState)
{
// If by chance we are inside a table, then give up and reflow
// everything because we don't cache max-element-size information in
// the lines.
if (aState.mComputeMaxElementSize) {
return PrepareResizeReflow(aState);
}
// Determine the line being impacted
PRBool isFloater;
nsLineBox* line = FindLineFor(aState.mNextRCFrame, isFloater);
if (nsnull == line) {
// This can't happen, but just in case it does...
return PrepareResizeReflow(aState);
}
// XXX: temporary: If the child frame is a floater then punt
if (isFloater) {
return PrepareResizeReflow(aState);
}
// XXX need code for run-in/compact
// Mark (at least) the affected line dirty.
line->MarkDirty();
if (aState.mNoWrap || line->IsBlock()) {
// If we aren't wrapping then we know for certain that any changes
// to a childs reflow can't affect the line that follows. This is
// also true if the line is a block line.
}
else {
// XXX: temporary: For now we are conservative and mark this line
// and any inline lines that follow it dirty.
line = line->mNext;
while (nsnull != line) {
if (line->IsBlock()) {
break;
}
line->MarkDirty();
line = line->mNext;
}
}
return NS_OK;
}
nsresult
nsBlockFrame::PrepareStyleChangedReflow(nsBlockReflowState& aState)
{
// XXX temporary
return PrepareResizeReflow(aState);
}
nsresult
nsBlockFrame::PrepareResizeReflow(nsBlockReflowState& aState)
{
// Mark everything dirty
nsLineBox* line = mLines;
while (nsnull != line) {
line->MarkDirty();
line = line->mNext;
}
return NS_OK;
}
//----------------------------------------
nsLineBox*
nsBlockFrame::FindLineFor(nsIFrame* aFrame, PRBool& aIsFloaterResult)
{
aIsFloaterResult = PR_FALSE;
nsLineBox* line = mLines;
while (nsnull != line) {
if (line->Contains(aFrame)) {
return line;
}
if (nsnull != line->mFloaters) {
nsVoidArray& a = *line->mFloaters;
PRInt32 i, n = a.Count();
for (i = 0; i < n; i++) {
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) a[i];
if (aFrame == ph->GetAnchoredItem()) {
aIsFloaterResult = PR_TRUE;
return line;
}
}
}
line = line->mNext;
}
return line;
}
nsresult
nsBlockFrame::RecoverStateFrom(nsBlockReflowState& aState,
nsLineBox* aLine,
nscoord aDeltaY)
{
aState.mCurrentLine = aLine;
// Recover xmost
nscoord xmost = aLine->mBounds.XMost();
if (xmost > aState.mKidXMost) {
aState.mKidXMost = xmost;
}
// Recover the natural (un-collapsed margins) for the child
nsMargin childMargins(0, 0, 0, 0);
if (aLine->IsBlock()) {
nsIFrame* frame = aLine->mFirstChild;
const nsStyleSpacing* spacing;
frame->GetStyleData(eStyleStruct_Spacing, (const nsStyleStruct*&)spacing);
nsBlockReflowContext::ComputeMarginsFor(aState.mPresContext, frame,
spacing, aState, childMargins);
}
// Recompute running margin value (aState.mPrevBottomMargin). Also
// recover the aState.mCarriedOutTopMargin, when appropriate.
nscoord topMargin, bottomMargin;
nsBlockReflowContext::CollapseMargins(childMargins,
aLine->GetCarriedOutTopMargin(),
aLine->GetCarriedOutBottomMargin(),
aLine->GetHeight(),
aState.mPrevBottomMargin,
topMargin, bottomMargin);
aState.mPrevBottomMargin = bottomMargin;
if (!aState.ShouldApplyTopMargin()) {
aState.mCarriedOutTopMargin = topMargin;
}
if (0 != aDeltaY) {
// Move this lines frames by the current delta value
SlideFrames(aState.mPresContext, aState.mSpaceManager, aLine, aDeltaY);
SlideFloaters(aState.mPresContext, aState.mSpaceManager, aLine, aDeltaY,
PR_FALSE);
}
if (nsnull != aLine->mFloaters) {
aState.mY = aLine->mBounds.y;
aState.PlaceCurrentLineFloaters(aLine->mFloaters);
aState.mY = aLine->mBounds.YMost();
aState.PlaceBelowCurrentLineFloaters(aLine->mFloaters);
}
// Advance Y to be below the line.
aState.mY = aLine->mBounds.YMost();
// XXX_fix_me: if the line has clear-before semantics then figure out
// if we need to do anything here or not!
// Apply any clear before/after semantics the line might have
if (!aLine->IsBlock() && (NS_STYLE_CLEAR_NONE != aLine->mBreakType)) {
// Apply clear
switch (aLine->mBreakType) {
case NS_STYLE_CLEAR_LEFT:
case NS_STYLE_CLEAR_RIGHT:
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
// XXX_fix_me is this the right y value to use? or should we use
// the previous aState.mY?
aState.ClearFloaters(aState.mY, aLine->mBreakType);
break;
}
}
return NS_OK;
}
/**
* Propogate reflow "damage" from the just reflowed line (aLine) to
* any subsequent lines that were affected. The only thing that causes
* damage is a change to the impact that floaters make.
*/
void
nsBlockFrame::PropogateReflowDamage(nsBlockReflowState& aState,
nsLineBox* aLine,
nscoord aDeltaY)
{
if (aLine->mCombinedArea.YMost() > aLine->mBounds.YMost()) {
// The line has an object that extends outside of its bounding box.
nscoord impactY0 = aLine->mCombinedArea.y;
nscoord impactY1 = aLine->mCombinedArea.YMost();
#ifdef NOISY_INCREMENTAL_REFLOW
if (aState.reason == eReflowReason_Incremental) {
IndentBy(stdout, gNoiseIndent);
printf("impactY0=%d impactY1=%d deltaY=%d\n",
impactY0, impactY1, aDeltaY);
}
#endif
// XXX Because we don't know what it is (it might be a floater; it
// might be something that is just relatively positioned) we
// *assume* that it's a floater and that lines that follow will
// need reflowing.
// Note: we cannot stop after the first non-intersecting line
// because lines might be overlapping because of negative margins.
nsLineBox* next = aLine->mNext;
while (nsnull != next) {
nscoord lineY0 = next->mBounds.y + aDeltaY;
nscoord lineY1 = lineY0 + next->mBounds.height;
if ((lineY0 < impactY1) && (impactY0 < lineY1)) {
#ifdef NOISY_INCREMENTAL_REFLOW
if (aState.reason == eReflowReason_Incremental) {
IndentBy(stdout, gNoiseIndent);
printf("line=%p setting dirty\n", next);
}
#endif
next->MarkDirty();
}
next = next->mNext;
}
}
}
/**
* Reflow the dirty lines
*/
nsresult
nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
{
nsresult rv = NS_OK;
PRBool keepGoing = PR_TRUE;
// Inform line layout of where the text runs are
aState.mLineLayout->SetReflowTextRuns(mTextRuns);
#ifdef NOISY_INCREMENTAL_REFLOW
if (aState.reason == eReflowReason_Incremental) {
nsIReflowCommand::ReflowType type;
aState.reflowCommand->GetType(type);
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": incrementally reflowing dirty lines: type=%s(%d)\n",
kReflowCommandType[type], type);
gNoiseIndent++;
}
#endif
// Reflow the lines that are already ours
aState.mPrevLine = nsnull;
nsLineBox* line = mLines;
nscoord deltaY = 0;
while (nsnull != line) {
#ifdef NOISY_INCREMENTAL_REFLOW
if (aState.reason == eReflowReason_Incremental) {
IndentBy(stdout, gNoiseIndent);
printf("line=%p mY=%d dirty=%s oldBounds=%d,%d,%d,%d deltaY=%d\n",
line, aState.mY, line->IsDirty() ? "yes" : "no",
line->mBounds, deltaY);
gNoiseIndent++;
}
#endif
if (line->IsDirty()) {
// Compute the dirty lines "before" YMost, after factoring in
// the running deltaY value - the running value is implicit in
// aState.mY.
nscoord oldHeight = line->mBounds.height;
// Reflow the dirty line
rv = ReflowLine(aState, line, keepGoing);
if (NS_FAILED(rv)) {
return rv;
}
DidReflowLine(aState, line, keepGoing);
if (!keepGoing) {
if (0 == line->ChildCount()) {
DeleteLine(aState, line);
}
break;
}
nscoord newHeight = line->mBounds.height;
deltaY += newHeight - oldHeight;
// If the next line is clean then check and see if reflowing the
// current line "damaged" the next line. Damage occurs when the
// current line contains floaters that intrude upon the
// subsequent lines.
nsLineBox* next = line->mNext;
if ((nsnull != next) && !next->IsDirty()) {
PropogateReflowDamage(aState, line, deltaY);
}
}
else {
// XXX what if the slid line doesn't fit because we are in a
// vertically constrained situation?
// Recover state as if we reflowed this line
RecoverStateFrom(aState, line, deltaY);
}
#ifdef NOISY_INCREMENTAL_REFLOW
if (aState.reason == eReflowReason_Incremental) {
gNoiseIndent--;
IndentBy(stdout, gNoiseIndent);
printf("line=%p mY=%d newBounds=%d,%d,%d,%d deltaY=%d\n",
line, aState.mY, line->mBounds, deltaY);
}
#endif
// If this is an inline frame then its time to stop
aState.mPrevLine = line;
line = line->mNext;
aState.mLineLayout->NextLine();
}
// Pull data from a next-in-flow if we can
while (keepGoing && (nsnull != aState.mNextInFlow)) {
// Grab first line from our next-in-flow
line = aState.mNextInFlow->mLines;
if (nsnull == line) {
aState.mNextInFlow = (nsBlockFrame*) aState.mNextInFlow->mNextInFlow;
continue;
}
// XXX See if the line is not dirty; if it's not maybe we can
// avoid the pullup if it can't fit?
aState.mNextInFlow->mLines = line->mNext;
line->mNext = nsnull;
if (0 == line->ChildCount()) {
// The line is empty. Try the next one.
NS_ASSERTION(nsnull == line->mFirstChild, "bad empty line");
delete line;
continue;
}
// XXX move to a subroutine: run-in, overflow, pullframe and this do this
// Make the children in the line ours.
nsIFrame* frame = line->mFirstChild;
nsIFrame* lastFrame = nsnull;
PRInt32 n = line->ChildCount();
while (--n >= 0) {
frame->SetParent(this);
lastFrame = frame;
frame->GetNextSibling(frame);
}
lastFrame->SetNextSibling(nsnull);
// Add line to our line list
if (nsnull == aState.mPrevLine) {
NS_ASSERTION(nsnull == mLines, "bad aState.mPrevLine");
mLines = line;
}
else {
NS_ASSERTION(nsnull == aState.mPrevLine->mNext, "bad aState.mPrevLine");
aState.mPrevLine->mNext = line;
aState.mPrevChild->SetNextSibling(line->mFirstChild);
}
// Now reflow it and any lines that it makes during it's reflow
// (we have to loop here because reflowing the line may case a new
// line to be created; see SplitLine's callers for examples of
// when this happens).
while (nsnull != line) {
rv = ReflowLine(aState, line, keepGoing);
if (NS_FAILED(rv)) {
return rv;
}
DidReflowLine(aState, line, keepGoing);
if (!keepGoing) {
if (0 == line->ChildCount()) {
DeleteLine(aState, line);
}
break;
}
// If this is an inline frame then its time to stop
aState.mPrevLine = line;
line = line->mNext;
aState.mLineLayout->NextLine();
}
}
#ifdef NOISY_INCREMENTAL_REFLOW
if (aState.reason == eReflowReason_Incremental) {
gNoiseIndent--;
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": done reflowing dirty lines (status=%x, mLimitToOneLine=%d)\n",
aState.mReflowStatus, aState.mLimitToOneLine);
}
#endif
return rv;
}
void
nsBlockFrame::DeleteLine(nsBlockReflowState& aState,
nsLineBox* aLine)
{
NS_PRECONDITION(0 == aLine->ChildCount(), "can't delete !empty line");
if (0 == aLine->ChildCount()) {
if (nsnull == aState.mPrevLine) {
NS_ASSERTION(aLine == mLines, "huh");
mLines = nsnull;
}
else {
NS_ASSERTION(aState.mPrevLine->mNext == aLine, "bad prev-line");
aState.mPrevLine->mNext = aLine->mNext;
}
delete aLine;
}
}
void
nsBlockFrame::WillReflowLine(nsBlockReflowState& aState,
nsLineBox* aLine)
{
// Setup the first-letter-style-ok flag
nsLineLayout& lineLayout = *aState.mLineLayout;
if (mFirstLetterStyle && (0 == lineLayout.GetLineNumber())) {
lineLayout.SetFirstLetterStyleOK(PR_TRUE);
}
else {
lineLayout.SetFirstLetterStyleOK(PR_FALSE);
}
}
/**
* Reflow a line. The line will either contain a single block frame
* or contain 1 or more inline frames. aLineReflowStatus indicates
* whether or not the caller should continue to reflow more lines.
*/
nsresult
nsBlockFrame::ReflowLine(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool& aKeepGoing)
{
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::ReflowLine: line=%p", aLine));
nsresult rv = NS_OK;
// If the line already has floaters on it from last time, remove
// them from the spacemanager now.
if (nsnull != aLine->mFloaters) {
aLine->mFloaters->Clear();
}
// 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()) {
nsIFrame* frame;
rv = PullFrame(aState, aLine, frame);
if (NS_FAILED(rv)) {
return rv;
}
if (nsnull == frame) {
aKeepGoing = PR_FALSE;
return rv;
}
}
// Setup the line-layout for the new line
aState.mLineLayout->Reset();
aState.mCurrentLine = aLine;
aLine->ClearDirty();
aLine->SetNeedDidReflow();
// Now that we know what kind of line we have, reflow it
if (aLine->IsBlock()) {
// When reflowing a block frame we always get the available space
aState.GetAvailableSpace();
if ((nsnull != aState.lineLayout) &&
(0 != aState.lineLayout->GetPlacedFrames())) {
// Blocks are not allowed on the same line as anything else
aState.mReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
aKeepGoing = PR_FALSE;
}
else {
// Notify observers that we are about to reflow the line
WillReflowLine(aState, aLine);
rv = ReflowBlockFrame(aState, aLine, aKeepGoing);
if (NS_FAILED(rv)) {
return rv;
}
}
}
else {
// When this class is an inline frame and we are reflowing inline
// frames then there is no point in getting available space.
nscoord x, availWidth, availHeight;
aState.GetAvailableSpace();
// Setup initial coordinate system for reflowing the inline frames
// into.
x = aState.mAvailSpaceRect.x + aState.mBorderPadding.left;
availWidth = aState.mAvailSpaceRect.width;
if (aState.mUnconstrainedHeight) {
availHeight = NS_UNCONSTRAINEDSIZE;
}
else {
/* XXX get the height right! */
availHeight = aState.mAvailSpaceRect.height;
}
aState.mInlineReflow->Init(x, aState.mY, availWidth, availHeight);
// Notify observers that we are about to reflow the line
WillReflowLine(aState, aLine);
// Reflow the frames that are already on the line first
PRBool keepLineGoing = PR_TRUE;
PRInt32 i;
nsIFrame* frame = aLine->mFirstChild;
for (i = 0; i < aLine->ChildCount(); i++) {
rv = ReflowInlineFrame(aState, aLine, frame,
keepLineGoing, aKeepGoing);
if (NS_FAILED(rv)) {
return rv;
}
if (!keepLineGoing) {
// It is possible that one or more of next lines are empty
// (because of DeleteNextInFlowsFor). If so, delete them now
// in case we are finished.
nsLineBox* nextLine = aLine->mNext;
while ((nsnull != nextLine) && (0 == nextLine->ChildCount())) {
// Discard empty lines immediately. Empty lines can happen
// here because of DeleteNextInFlowsFor not being able to
// delete lines.
aLine->mNext = nextLine->mNext;
NS_ASSERTION(nsnull == nextLine->mFirstChild, "bad empty line");
delete nextLine;
nextLine = aLine->mNext;
}
break;
}
frame->GetNextSibling(frame);
}
// Pull frames and reflow them until we can't
while (keepLineGoing) {
nsIFrame* frame;
rv = PullFrame(aState, aLine, frame);
if (NS_FAILED(rv)) {
return rv;
}
if (nsnull == frame) {
break;
}
rv = ReflowInlineFrame(aState, aLine, frame, keepLineGoing,
aKeepGoing);
if (NS_FAILED(rv)) {
return rv;
}
}
// If we are propogating out a break-before status then there is
// no point in placing the line.
if (!NS_INLINE_IS_BREAK_BEFORE(aState.mReflowStatus)) {
rv = PlaceLine(aState, aLine, aKeepGoing);
}
}
return rv;
}
/**
* Pull frame from the next available location (one of our lines or
* one of our next-in-flows lines).
*/
nsresult
nsBlockFrame::PullFrame(nsBlockReflowState& aState,
nsLineBox* aLine,
nsIFrame*& aFrameResult)
{
nsresult rv = NS_OK;
PRBool stopPulling;
aFrameResult = nsnull;
// First check our remaining lines
while (nsnull != aLine->mNext) {
rv = PullFrame(aState, aLine, &aLine->mNext, PR_FALSE,
aFrameResult, stopPulling);
if (NS_FAILED(rv) || stopPulling) {
return rv;
}
}
// Pull frames from the next-in-flow(s) until we can't
nsBlockFrame* nextInFlow = aState.mNextInFlow;
while (nsnull != nextInFlow) {
nsLineBox* line = nextInFlow->mLines;
if (nsnull == line) {
nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
aState.mNextInFlow = nextInFlow;
continue;
}
rv = PullFrame(aState, aLine, &nextInFlow->mLines, PR_TRUE,
aFrameResult, stopPulling);
if (NS_FAILED(rv) || stopPulling) {
return rv;
}
}
return rv;
}
/**
* Try to pull a frame out a line pointed at by aFromList. If a frame
* is pulled then aPulled will be set to PR_TRUE. In addition, if
* aUpdateGeometricParent is set then the pulled frames geometric
* parent will be updated (e.g. when pulling from a next-in-flows line
* list).
*
* Note: pulling a frame from a line that is a place-holder frame
* doesn't automatically remove the corresponding floater from the
* line's floater array. This happens indirectly: either the line gets
* emptied (and destroyed) or the line gets reflowed (because we mark
* it dirty) and the code at the top of ReflowLine empties the
* array. So eventually, it will be removed, just not right away.
*/
nsresult
nsBlockFrame::PullFrame(nsBlockReflowState& aState,
nsLineBox* aLine,
nsLineBox** aFromList,
PRBool aUpdateGeometricParent,
nsIFrame*& aFrameResult,
PRBool& aStopPulling)
{
nsLineBox* fromLine = *aFromList;
NS_ASSERTION(nsnull != fromLine, "bad line to pull from");
if (0 == fromLine->ChildCount()) {
// Discard empty lines immediately. Empty lines can happen here
// because of DeleteChildsNextInFlow not being able to delete
// lines. Don't stop pulling - there may be more frames around.
*aFromList = fromLine->mNext;
NS_ASSERTION(nsnull == fromLine->mFirstChild, "bad empty line");
delete fromLine;
aStopPulling = PR_FALSE;
aFrameResult = nsnull;
}
else if ((0 != aLine->ChildCount()) && fromLine->IsBlock()) {
// If our line is not empty and the child in aFromLine is a block
// then we cannot pull up the frame into this line. In this case
// we stop pulling.
aStopPulling = PR_TRUE;
aFrameResult = nsnull;
}
else {
// Take frame from fromLine
nsIFrame* frame = fromLine->mFirstChild;
if (0 == aLine->mChildCount++) {
aLine->mFirstChild = frame;
aLine->SetIsBlock(fromLine->IsBlock());
NS_ASSERTION(aLine->CheckIsBlock(), "bad line isBlock");
}
if (0 != --fromLine->mChildCount) {
// Mark line dirty now that we pulled a child
fromLine->MarkDirty();
frame->GetNextSibling(fromLine->mFirstChild);
}
else {
// Free up the fromLine now that it's empty
*aFromList = fromLine->mNext;
delete fromLine;
}
// Change geometric parents
if (aUpdateGeometricParent) {
frame->SetParent(this);
// The frame is being pulled from a next-in-flow; therefore we
// need to add it to our sibling list.
if (nsnull != aState.mPrevChild) {
aState.mPrevChild->SetNextSibling(frame);
}
frame->SetNextSibling(nsnull);
#ifdef NS_DEBUG
VerifyLineLength(aLine);
#endif
}
// Stop pulling because we found a frame to pull
aStopPulling = PR_TRUE;
aFrameResult = frame;
}
return NS_OK;
}
void
nsBlockFrame::DidReflowLine(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool aLineReflowStatus)
{
// If the line no longer needs a floater array, get rid of it and
// save some memory
nsVoidArray* array = aLine->mFloaters;
if (nsnull != array) {
if (0 == array->Count()) {
delete array;
aLine->mFloaters = nsnull;
}
else {
array->Compact();
}
}
}
void
nsBlockFrame::SlideFrames(nsIPresContext& aPresContext,
nsISpaceManager* aSpaceManager,
nsLineBox* aLine, nscoord aDY)
{
#if 0
ListTag(stdout); printf(": SlideFrames: line=%p dy=%d\n", aDY);
#endif
// Adjust the Y coordinate of the frames in the line
nsRect r;
nsIFrame* kid = aLine->mFirstChild;
PRInt32 n = aLine->ChildCount();
while (--n >= 0) {
kid->GetRect(r);
r.y += aDY;
kid->SetRect(r);
// If the child has any floaters that impact the space manager,
// slide them now.
nsIHTMLReflow* ihr;
if (NS_OK == kid->QueryInterface(kIHTMLReflowIID, (void**)&ihr)) {
ihr->MoveInSpaceManager(aPresContext, aSpaceManager, 0, aDY);
}
kid->GetNextSibling(kid);
}
// Adjust line state
aLine->mBounds.y += aDY;
aLine->mCombinedArea.y += aDY;
}
void
nsBlockFrame::SlideFloaters(nsIPresContext& aPresContext,
nsISpaceManager* aSpaceManager,
nsLineBox* aLine, nscoord aDY,
PRBool aUpdateSpaceManager)
{
nsVoidArray* floaters = aLine->mFloaters;
if (nsnull != floaters) {
nsRect r;
PRInt32 i, n = floaters->Count();
for (i = 0; i < n; i++) {
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) floaters->ElementAt(i);
nsIFrame* floater = ph->GetAnchoredItem();
floater->GetRect(r);
r.y += aDY;
floater->SetRect(r);
if (aUpdateSpaceManager) {
// Adjust placement in space manager by the same amount
aSpaceManager->OffsetRegion(floater, 0, aDY);
}
}
}
}
NS_IMETHODIMP
nsBlockFrame::MoveInSpaceManager(nsIPresContext& aPresContext,
nsISpaceManager* aSpaceManager,
nscoord aDeltaX, nscoord aDeltaY)
{
#if 0
ListTag(stdout); printf(": MoveInSpaceManager: d=%d,%d\n", aDeltaX, aDeltaY);
#endif
nsLineBox* line = mLines;
while (nsnull != line) {
// Move the floaters in the spacemanager
nsVoidArray* floaters = line->mFloaters;
if (nsnull != floaters) {
PRInt32 i, n = floaters->Count();
for (i = 0; i < n; i++) {
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) floaters->ElementAt(i);
nsIFrame* floater = ph->GetAnchoredItem();
aSpaceManager->OffsetRegion(floater, aDeltaX, aDeltaY);
#if 0
((nsFrame*)kid)->ListTag(stdout); printf(": offset=%d,%d\n", aDeltaX, aDeltaY);
#endif
}
}
// Tell kids about the move too
PRInt32 n = line->ChildCount();
nsIFrame* kid = line->mFirstChild;
while (--n >= 0) {
nsIHTMLReflow* ihr;
if (NS_OK == kid->QueryInterface(kIHTMLReflowIID, (void**)&ihr)) {
ihr->MoveInSpaceManager(aPresContext, aSpaceManager, aDeltaX, aDeltaY);
}
kid->GetNextSibling(kid);
}
line = line->mNext;
}
return NS_OK;
}
nsBlockFrame*
nsBlockFrame::FindFollowingBlockFrame(nsIFrame* aFrame)
{
nsBlockFrame* followingBlockFrame = nsnull;
nsIFrame* frame = aFrame;
for (;;) {
nsIFrame* nextFrame;
frame->GetNextSibling(nextFrame);
if (nsnull != nextFrame) {
const nsStyleDisplay* display;
nextFrame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
if (NS_STYLE_DISPLAY_BLOCK == display->mDisplay) {
#ifdef NOISY_RUNIN
ListTag(stdout);
printf(": frame: ");
aFrame->ListTag(stdout);
printf(" followed by: ");
nextFrame->ListTag(stdout);
printf("\n");
#endif
followingBlockFrame = (nsBlockFrame*) nextFrame;
break;
}
else if (NS_STYLE_DISPLAY_INLINE == display->mDisplay) {
// If it's a text-frame and it's just whitespace and we are
// in a normal whitespace situation THEN skip it and keep
// going...
// XXX WRITE ME!
}
frame = nextFrame;
}
else
break;
}
return followingBlockFrame;
}
#if XXX
void
nsBlockFrame::WillReflowFrame(nsBlockReflowState& aState,
nsLineBox* aLine,
nsIFrame* aFrame)
{
nsIStyleContext* kidSC;
aFrame->GetStyleContext(kidSC);
if (nsnull != kidSC) {
nsIStyleContext* kidParentSC;
kidParentSC = kidSC->GetParent();
if (nsnull != kidParentSC) {
if (kidParentSC != mStyleContext) {
// The frame has changed situations so re-resolve its style
// context in the new situation.
aFrame->ReResolveStyleContext(&aState.mPresContext, mStyleContext);
}
NS_RELEASE(kidParentSC);
}
NS_RELEASE(kidSC);
}
}
#endif
void
nsBlockFrame::WillReflowFrame(nsBlockReflowState& aState,
nsLineBox* aLine,
nsIFrame* aFrame)
{
PRBool repairStyleContext = PR_TRUE;
// When reflowing a frame that is on the first-line, check and see
// if a special style context should be placed in the context chain.
if ((nsnull == mPrevInFlow) &&
(0 == aState.mLineLayout->GetLineNumber())) {
if (nsnull != mFirstLineStyle) {
// Update the child frames style to inherit from the first-line
// style.
// XXX add code to check first and only do it if it needs doing!
#ifdef REALLY_NOISY_FIRST_LINE
DumpStyleGeneaology(aFrame, "");
#endif
#ifdef NOISY_FIRST_LINE
ListTag(stdout);
printf(": ");
((nsFrame*)aFrame)->ListTag(stdout);
printf(" adding in first-line style\n");
#endif
aFrame->ReResolveStyleContext(&aState.mPresContext, mFirstLineStyle);
repairStyleContext = PR_FALSE;
#ifdef REALLY_NOISY_FIRST_LINE
DumpStyleGeneaology(aFrame, " ");
#endif
}
if ((nsnull != mFirstLetterStyle) &&
aState.mLineLayout->GetFirstLetterStyleOK()) {
aFrame->ReResolveStyleContext(&aState.mPresContext, mFirstLetterStyle);
repairStyleContext = PR_FALSE;
}
}
if (repairStyleContext) {
// Update style context when appropriate
nsIStyleContext* kidSC;
aFrame->GetStyleContext(&kidSC);
if (nsnull != kidSC) {
nsIStyleContext* kidParentSC;
kidParentSC = kidSC->GetParent();
if (nsnull != kidParentSC) {
if (kidParentSC != mStyleContext) {
aFrame->ReResolveStyleContext(&aState.mPresContext, mStyleContext);
}
NS_RELEASE(kidParentSC);
}
NS_RELEASE(kidSC);
}
}
}
void
nsBlockFrame::DidReflowFrame(nsBlockReflowState& aState,
nsLineBox* aLine,
nsIFrame* aFrame,
nsReflowStatus aStatus)
{
}
nsresult
nsBlockFrame::ReflowBlockFrame(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool& aKeepReflowGoing)
{
NS_PRECONDITION(aKeepReflowGoing, "bad caller");
NS_PRECONDITION(0 == aState.mLineLayout->GetPlacedFrames(),
"non-empty line with a block");
nsresult rv = NS_OK;
nsIFrame* frame = aLine->mFirstChild;
// Prepare the inline reflow engine
nsBlockFrame* runInToFrame;
nsBlockFrame* compactWithFrame;
nscoord compactMarginWidth = 0;
PRBool isCompactFrame = PR_FALSE;
const nsStyleDisplay* display;
frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
switch (display->mDisplay) {
case NS_STYLE_DISPLAY_RUN_IN:
#ifdef NOISY_RUNIN
ListTag(stdout);
printf(": trying to see if ");
aFrame->ListTag(stdout);
printf(" is a run-in candidate\n");
#endif
runInToFrame = FindFollowingBlockFrame(frame);
if (nsnull != runInToFrame) {
// XXX run-in frame should be pushed to the next-in-flow too if the
// run-in-to frame is pushed.
nsRect r(0, aState.mY, 0, 0);
aLine->mBounds = r;
aLine->mCombinedArea = r;
aLine->mCarriedOutTopMargin = 0;
aLine->mCarriedOutBottomMargin = 0;
aLine->SetMarginFlags(0);
#if XXX_need_line_outside_children
aLine->ClearOutsideChildren();
#endif
aLine->mBreakType = NS_STYLE_CLEAR_NONE;
//XXX aFrame->WillReflow(aState.mPresContext);
frame->SetRect(r);
aState.mPrevChild = frame;
aState.mRunInToFrame = runInToFrame;
aState.mRunInFrame = (nsBlockFrame*) frame;
return rv;
}
break;
case NS_STYLE_DISPLAY_COMPACT:
compactWithFrame = FindFollowingBlockFrame(frame);
if (nsnull != compactWithFrame) {
const nsStyleSpacing* spacing;
nsMargin margin;
nsresult rv;
rv = compactWithFrame->GetStyleData(eStyleStruct_Spacing,
(const nsStyleStruct*&) spacing);
if (NS_SUCCEEDED(rv) && (nsnull != spacing)) {
nsHTMLReflowState::ComputeMarginFor(compactWithFrame, &aState,
margin);
compactMarginWidth = margin.left;
}
isCompactFrame = PR_TRUE;
}
break;
}
nsBlockReflowContext brc(aState.mPresContext, *aState.mLineLayout, aState);
brc.SetCompactMarginWidth(compactMarginWidth);
// Clear floaters before the block if the clear style is not none
aLine->mBreakType = display->mBreakType;
if (NS_STYLE_CLEAR_NONE != display->mBreakType) {
switch (display->mBreakType) {
case NS_STYLE_CLEAR_LEFT:
case NS_STYLE_CLEAR_RIGHT:
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
aState.ClearFloaters(aState.mY, display->mBreakType);
// XXX: ?If we just advanced Y then we need to factor that amount
// into the next margin calculation and reduce the amount of Y
// margin applied by the amount just moved.
break;
}
}
// Set run-in frame if this is the run-in-to frame. That way the
// target block frame knows to pick up the children from the run-in
// frame.
if (frame == aState.mRunInToFrame) {
brc.SetRunInFrame(aState.mRunInFrame);
}
// Compute the available space for the block
nscoord availHeight = aState.mUnconstrainedHeight
? NS_UNCONSTRAINEDSIZE
: aState.mBottomEdge - aState.mY;
// Now setup the availSpace rect. If the block frame we are
// reflowing is one of "ours" (block, run-in, compact, list-item)
// then we get it an available space that is *NOT* affected by
// floaters. Otherwise we position the block outside of the
// floaters.
nscoord availX, availWidth;
nsSplittableType splitType;
switch (display->mDisplay) {
case NS_STYLE_DISPLAY_BLOCK:
case NS_STYLE_DISPLAY_RUN_IN:
case NS_STYLE_DISPLAY_COMPACT:
case NS_STYLE_DISPLAY_LIST_ITEM:
if (NS_SUCCEEDED(frame->IsSplittable(splitType)) &&
(NS_FRAME_SPLITTABLE_NON_RECTANGULAR == splitType)) {
availX = aState.mBorderPadding.left;
availWidth = aState.mUnconstrainedWidth
? NS_UNCONSTRAINEDSIZE
: aState.mContentArea.width;
break;
}
// Assume the frame is clueless about the space manager
// FALLTHROUGH
default:
availX = aState.mAvailSpaceRect.x + aState.mBorderPadding.left;
availWidth = aState.mAvailSpaceRect.width;
break;
}
// Reflow the block into the available space
nsRect availSpace(availX, aState.mY, availWidth, availHeight);
WillReflowFrame(aState, aLine, frame);
nsReflowStatus frameReflowStatus;
nsMargin computedOffsets;
rv = brc.ReflowBlock(frame, availSpace, aState.IsAdjacentWithTop(),
computedOffsets, frameReflowStatus);
if (NS_FAILED(rv)) {
return rv;
}
DidReflowFrame(aState, aLine, frame, frameReflowStatus);
aState.mPrevChild = frame;
#if defined(REFLOW_STATUS_COVERAGE)
RecordReflowStatus(PR_TRUE, frameReflowStatus);
#endif
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
// None of the child block fits.
PushLines(aState);
aKeepReflowGoing = PR_FALSE;
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
}
else {
// Note: line-break-after a block is a nop
// Try to place the child block
PRBool isAdjacentWithTop = aState.IsAdjacentWithTop();
PRBool applyTopMargin = aState.ShouldApplyTopMargin();
aKeepReflowGoing = brc.PlaceBlock(isAdjacentWithTop, applyTopMargin,
aState.mPrevBottomMargin, computedOffsets,
aLine->mBounds, aLine->mCombinedArea);
if (aKeepReflowGoing) {
// Some of the child block fit
// Set carry out top margin value when margin is not being applied
if (!applyTopMargin) {
aState.mCarriedOutTopMargin = brc.GetCollapsedTopMargin();
}
// Advance to new Y position
nscoord newY = aLine->mBounds.YMost();
if (isCompactFrame) {
// For compact frames, we don't adjust the Y coordinate at all IF
// the compact frame ended up fitting in the margin space
// allocated for it.
nsRect r;
frame->GetRect(r);
if (r.width <= compactMarginWidth) {
// XXX margins will be wrong
// XXX ltr/rtl for horizontal placement within the margin area
// XXX vertical alignment with the compactWith frame's *first line*
newY = aState.mY;
}
}
aState.mY = newY;
aLine->mCarriedOutTopMargin = brc.GetCarriedOutTopMargin();
aLine->mCarriedOutBottomMargin = brc.GetCarriedOutBottomMargin();
// Continue the block frame now if it didn't completely fit in
// the available space.
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
PRBool madeContinuation;
rv = CreateContinuationFor(aState, aLine, frame, madeContinuation);
if (NS_FAILED(rv)) {
return rv;
}
// Push continuation to a new line, but only if we actually
// made one.
if (madeContinuation) {
frame->GetNextSibling(frame);
nsLineBox* line = new nsLineBox(frame, 1, LINE_IS_BLOCK);
if (nsnull == line) {
return NS_ERROR_OUT_OF_MEMORY;
}
line->mNext = aLine->mNext;
aLine->mNext = line;
// Do not count the continuation child on the line it used
// to be on
aLine->mChildCount--;
}
// Advance to next line since some of the block fit. That way
// only the following lines will be pushed.
aState.mPrevLine = aLine;
PushLines(aState);
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
aKeepReflowGoing = PR_FALSE;
// The bottom margin for a block is only applied on the last
// flow block. Since we just continued the child block frame,
// we know that line->mFirstChild is not the last flow block
// therefore zero out the running margin value.
aState.mPrevBottomMargin = 0;
}
else {
aState.mPrevBottomMargin = brc.GetCollapsedBottomMargin();
}
// Post-process the "line"
PostPlaceLine(aState, aLine, brc.GetMaxElementSize());
// Notify anyone who cares that the line has been placed
DidPlaceLine(aState, aLine,
applyTopMargin ? brc.GetCollapsedTopMargin() : 0,
brc.GetCollapsedBottomMargin(), aKeepReflowGoing);
}
else {
// None of the block fits. Determine the correct reflow status.
if (aLine == mLines) {
// If it's our very first line then we need to be pushed to
// our parents next-in-flow. Therefore, return break-before
// status for our reflow status.
aState.mReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
}
else {
// Push the line that didn't fit and any lines that follow it
// to our next-in-flow.
PushLines(aState);
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
}
}
}
return rv;
}
/**
* Reflow an inline frame. The reflow status is mapped from the frames
* reflow status to the lines reflow status (not to our reflow status).
* The line reflow status is simple: PR_TRUE means keep placing frames
* on the line; PR_FALSE means don't (the line is done). If the line
* has some sort of breaking affect then aLine->mBreakType will be set
* to something other than NS_STYLE_CLEAR_NONE.
*/
nsresult
nsBlockFrame::ReflowInlineFrame(nsBlockReflowState& aState,
nsLineBox* aLine,
nsIFrame* aFrame,
PRBool& aKeepLineGoing,
PRBool& aKeepReflowGoing)
{
NS_PRECONDITION(aKeepLineGoing && aKeepReflowGoing, "bad caller");
// Send pre-reflow notification
WillReflowFrame(aState, aLine, aFrame);
// 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();
// Reflow the inline frame
nsReflowStatus frameReflowStatus;
nsresult rv = aState.mInlineReflow->ReflowFrame(aFrame, aState.IsAdjacentWithTop(),
frameReflowStatus);
if (NS_FAILED(rv)) {
return rv;
}
#if defined(REFLOW_STATUS_COVERAGE)
RecordReflowStatus(PR_FALSE, frameReflowStatus);
#endif
// Send post-reflow notification
DidReflowFrame(aState, aLine, aFrame, frameReflowStatus);
aState.mPrevChild = aFrame;
// Process the child frames reflow status. There are 5 cases:
// complete, not-complete, break-before, break-after-complete,
// break-after-not-complete. There are two situations: we are a
// block or we are an inline. This makes a total of 10 cases
// (fortunately, there is some overlap).
aLine->mBreakType = NS_STYLE_CLEAR_NONE;
if (NS_INLINE_IS_BREAK(frameReflowStatus)) {
// Always abort the line reflow (because a line break is the
// minimal amount of break we do).
aKeepLineGoing = PR_FALSE;
// XXX what should aLine->mBreakType be set to in all these cases?
PRUint8 breakType = NS_INLINE_GET_BREAK_TYPE(frameReflowStatus);
NS_ASSERTION(breakType != NS_STYLE_CLEAR_NONE, "bad break type");
NS_ASSERTION(NS_STYLE_CLEAR_PAGE != breakType, "no page breaks yet");
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
// Break-before cases.
if (aFrame == aLine->mFirstChild) {
// All break-before's that occur at the first child on a
// line stop the overall reflow.
aKeepReflowGoing = PR_FALSE;
if (mLines == aLine) {
// If it's our first child on our first line then propogate
// outward the break-before reflow status unmodified.
aState.mReflowStatus = frameReflowStatus;
}
else {
// Its not our first line; push the remaining lines to a
// next-in-flow
PushLines(aState);
// Adjust the reflow status to indicate a
// break-after-not-complete; because we need to be continued
// and we need to force a line break (or something stronger)
// upstream.
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE | NS_INLINE_BREAK |
NS_INLINE_BREAK_AFTER | NS_INLINE_MAKE_BREAK_TYPE(breakType);
}
}
else {
// It's not the first child on this line so go ahead and split
// the line. We will see the frame again on the next-line.
rv = SplitLine(aState, aLine, aFrame);
if (NS_FAILED(rv)) {
return rv;
}
}
}
else {
// Break-after cases
aLine->mBreakType = breakType;
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
// Create a continuation for the incomplete frame. Note that the
// frame may already have a continuation.
PRBool madeContinuation;
rv = CreateContinuationFor(aState, aLine, aFrame, madeContinuation);
if (NS_FAILED(rv)) {
return rv;
}
}
// Split line, but after the frame just reflowed
aFrame->GetNextSibling(aFrame);
rv = SplitLine(aState, aLine, aFrame);
if (NS_FAILED(rv)) {
return rv;
}
// Mark next line dirty in case SplitLine didn't end up
// pushing any frames.
nsLineBox* next = aLine->mNext;
if ((nsnull != next) && !next->IsBlock()) {
next->MarkDirty();
}
}
}
else if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
// Frame is not-complete, no special breaking status
// Create a continuation for the incomplete frame. Note that the
// frame may already have a continuation.
PRBool madeContinuation;
rv = CreateContinuationFor(aState, aLine, aFrame, madeContinuation);
if (NS_FAILED(rv)) {
return rv;
}
PRBool needSplit = PR_FALSE;
if (!reflowingFirstLetter) {
needSplit = PR_TRUE;
}
if (needSplit) {
// Split line after the current frame
aKeepLineGoing = PR_FALSE;
aFrame->GetNextSibling(aFrame);
rv = SplitLine(aState, aLine, aFrame);
if (NS_FAILED(rv)) {
return rv;
}
// Mark next line dirty in case SplitLine didn't end up
// pushing any frames.
nsLineBox* next = aLine->mNext;
if ((nsnull != next) && !next->IsBlock()) {
next->MarkDirty();
}
}
}
return NS_OK;
}
/**
* Create a continuation, if necessary, for aFrame. Place it on the
* same line that aFrame is on. Set aMadeNewFrame to PR_TRUE if a
* new frame is created.
*/
nsresult
nsBlockFrame::CreateContinuationFor(nsBlockReflowState& aState,
nsLineBox* aLine,
nsIFrame* aFrame,
PRBool& aMadeNewFrame)
{
aMadeNewFrame = PR_FALSE;
nsresult rv;
nsIFrame* nextInFlow;
rv = CreateNextInFlow(aState.mPresContext, this, aFrame, nextInFlow);
if (NS_FAILED(rv)) {
return rv;
}
if (nsnull != nextInFlow) {
aMadeNewFrame = PR_TRUE;
aLine->mChildCount++;
#ifdef NS_DEBUG
VerifyLineLength(aLine);
#endif
}
return rv;
}
nsresult
nsBlockFrame::SplitLine(nsBlockReflowState& aState,
nsLineBox* aLine,
nsIFrame* aFrame)
{
PRInt32 pushCount = aLine->ChildCount() -
aState.mInlineReflow->GetCurrentFrameNum();
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::SplitLine: pushing %d frames",
pushCount));
if (0 != pushCount) {
NS_ASSERTION(aLine->ChildCount() > pushCount, "bad push");
NS_ASSERTION(nsnull != aFrame, "whoops");
nsLineBox* to = aLine->mNext;
if (nsnull != to) {
// Only push into the next line if it's empty; otherwise we can
// end up pushing a frame which is continued into the same frame
// as it's continuation. This causes all sorts of bad side
// effects so we don't allow it.
if (0 != to->ChildCount()) {
nsLineBox* insertedLine = new nsLineBox(aFrame, pushCount, 0);
if (nsnull == insertedLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
aLine->mNext = insertedLine;
insertedLine->mNext = to;
to = insertedLine;
} else {
to->mFirstChild = aFrame;
to->mChildCount += pushCount;
to->MarkDirty();
}
} else {
to = new nsLineBox(aFrame, pushCount, 0);
if (nsnull == to) {
return NS_ERROR_OUT_OF_MEMORY;
}
aLine->mNext = to;
}
to->SetIsBlock(aLine->IsBlock());
aLine->mChildCount -= pushCount;
#ifdef NS_DEBUG
VerifyLineLength(aLine);
#endif
// Let inline reflow know that some frames are no longer part of
// its state.
if (!aLine->IsBlock()) {
aState.mInlineReflow->ChangeFrameCount(aLine->ChildCount());
}
}
return NS_OK;
}
PRBool
nsBlockFrame::ShouldJustifyLine(nsBlockReflowState& aState, nsLineBox* aLine)
{
nsLineBox* next = aLine->mNext;
while (nsnull != next) {
// There is another line
if (0 != next->ChildCount()) {
// If the next line is a block line then we must not justify
// this line because it means that this line is the last in a
// group of inline lines.
return !next->IsBlock();
}
// The next line is empty, try the next one
next = next->mNext;
}
// XXX Not sure about this part
// Try our next-in-flows lines to answer the question
nsBlockFrame* nextInFlow = (nsBlockFrame*) mNextInFlow;
while (nsnull != nextInFlow) {
nsLineBox* line = nextInFlow->mLines;
while (nsnull != line) {
if (0 != line->ChildCount()) {
return !line->IsBlock();
}
line = line->mNext;
}
nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
}
// This is the last line - so don't allow justification
return PR_FALSE;
}
nsresult
nsBlockFrame::PlaceLine(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool& aKeepReflowGoing)
{
nsresult rv = NS_OK;
// Align the children. This also determines the actual height and
// width of the line.
nsInlineReflow& ir = *aState.mInlineReflow;
ir.VerticalAlignFrames(aLine->mBounds, aState.mAscent, aState.mDescent);
// Only block frames horizontally align their children because
// inline frames "shrink-wrap" around their children (therefore
// there is no extra horizontal space).
PRBool allowJustify = PR_TRUE;
if (NS_STYLE_TEXT_ALIGN_JUSTIFY == aState.mStyleText->mTextAlign) {
allowJustify = ShouldJustifyLine(aState, aLine);
}
ir.TrimTrailingWhiteSpace(aLine->mBounds);
ir.HorizontalAlignFrames(aLine->mBounds, allowJustify);
ir.RelativePositionFrames(aLine->mCombinedArea);
// Calculate the bottom margin for the line.
nscoord lineBottomMargin = 0;
if (0 == aLine->mBounds.height) {
nsIFrame* brFrame = aState.mLineLayout->GetBRFrame();
if (nsnull != brFrame) {
// If a line ends in a BR, and the line is empty of height, then
// we make sure that the line ends up with some height
// anyway. Note that the height looks like vertical margin so
// that it can compress with other block margins.
nsIStyleContext* brSC;
nsIPresContext& px = aState.mPresContext;
nsresult rv = brFrame->GetStyleContext(&brSC);
if ((NS_OK == rv) && (nsnull != brSC)) {
const nsStyleFont* font = (const nsStyleFont*)
brSC->GetStyleData(eStyleStruct_Font);
nsIFontMetrics* fm = px.GetMetricsFor(font->mFont);
if (nsnull != fm) {
fm->GetHeight(lineBottomMargin);
NS_RELEASE(fm);
}
NS_RELEASE(brSC);
}
}
}
else {
aState.mRunInFromFrame = nsnull;
aState.mRunInToFrame = nsnull;
}
// Calculate the lines top and bottom margin values. The margin will
// come from an embedded block frame, not from inline
// frames. Because this is an "inline" line, the child margins are
// all effectively zero so we pass in nsMargin(0, 0, 0, 0).
nscoord topMargin, bottomMargin;
nsBlockReflowContext::CollapseMargins(nsMargin(0, 0, 0, 0),
ir.GetCarriedOutTopMargin(),
ir.GetCarriedOutBottomMargin(),
aLine->mBounds.height,
aState.mPrevBottomMargin,
topMargin, bottomMargin);
#if XXX
ListTag(stdout);
printf(": ");
((nsFrame*)(aLine->mFirstChild))->ListTag(stdout);
printf(" mY=%d carried=%d,%d top=%d bottom=%d prev=%d shouldApply=%s\n",
aState.mY, ir.GetCarriedOutTopMargin(), ir.GetCarriedOutBottomMargin(),
topMargin, bottomMargin, aState.mPrevBottomMargin,
aState.ShouldApplyTopMargin() ? "yes" : "no");
#endif
if (!aState.ShouldApplyTopMargin()) {
aState.mCarriedOutTopMargin = topMargin;
topMargin = 0;
}
// See if the line fit. If it doesn't we need to push it. Our first
// line will always fit.
nscoord newY = aLine->mBounds.YMost() + topMargin + lineBottomMargin;
NS_FRAME_TRACE(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockFrame::PlaceLine: newY=%d limit=%d lineHeight=%d",
newY, aState.mBottomEdge, aLine->mBounds.height));
if ((mLines != aLine) && (newY > aState.mBottomEdge)) {
// Push this line and all of it's children and anything else that
// follows to our next-in-flow
PushLines(aState);
// Stop reflow and whack the reflow status if reflow hasn't
// already been stopped.
if (aKeepReflowGoing) {
NS_ASSERTION(NS_FRAME_COMPLETE == aState.mReflowStatus,
"lost reflow status");
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
aKeepReflowGoing = PR_FALSE;
}
return rv;
}
aLine->mCarriedOutTopMargin = ir.GetCarriedOutTopMargin();
aLine->mCarriedOutBottomMargin = ir.GetCarriedOutBottomMargin();
aState.mPrevBottomMargin = bottomMargin;
if (0 != topMargin) {
// Apply collapsed top-margin value
SlideFrames(aState.mPresContext, aState.mSpaceManager, aLine, topMargin);
SlideFloaters(aState.mPresContext, aState.mSpaceManager, aLine, topMargin,
PR_TRUE);
}
aState.mY = newY;
PostPlaceLine(aState, aLine, ir.GetMaxElementSize());
// Any below current line floaters to place?
if (0 != aState.mPendingFloaters.Count()) {
aState.PlaceBelowCurrentLineFloaters(&aState.mPendingFloaters);
aState.mPendingFloaters.Clear();
}
// Apply break-after clearing if necessary
PRUint8 breakType = aLine->mBreakType;
switch (breakType) {
case NS_STYLE_CLEAR_LEFT:
case NS_STYLE_CLEAR_RIGHT:
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
aState.ClearFloaters(aState.mY, breakType);
break;
}
// Notify anyone who cares that the line has been placed
DidPlaceLine(aState, aLine, topMargin, bottomMargin, aKeepReflowGoing);
return rv;
}
// Compute the line's max-element-size by adding into the raw value
// computed by reflowing the contents of the line (aMaxElementSize)
// the impact of floaters on this line or the preceeding lines.
void
nsBlockFrame::ComputeLineMaxElementSize(nsBlockReflowState& aState,
nsLineBox* aLine,
nsSize* aMaxElementSize)
{
nscoord maxWidth, maxHeight;
aState.mCurrentBand.GetMaxElementSize(&maxWidth, &maxHeight);
// Add in the maximum width of any floaters in the band because we
// always place some non-floating content with a floater.
aMaxElementSize->width += maxWidth;
// If the maximum-height of the tallest floater is larger than the
// maximum-height of the content then update the max-element-size
// height
if (maxHeight > aMaxElementSize->height) {
aMaxElementSize->height = maxHeight;
}
}
void
nsBlockFrame::PostPlaceLine(nsBlockReflowState& aState,
nsLineBox* aLine,
const nsSize& aMaxElementSize)
{
// Update max-element-size
if (aState.mComputeMaxElementSize) {
nsSize lineMaxElementSize(aMaxElementSize);
if (0 != aState.mCurrentBand.GetFloaterCount()) {
// Add in floater impacts to the lines max-element-size
ComputeLineMaxElementSize(aState, aLine, &lineMaxElementSize);
}
if (lineMaxElementSize.width > aState.mMaxElementSize.width) {
aState.mMaxElementSize.width = lineMaxElementSize.width;
}
if (lineMaxElementSize.height > aState.mMaxElementSize.height) {
aState.mMaxElementSize.height = lineMaxElementSize.height;
}
}
#if XXX_need_line_outside_children
// Compute LINE_OUTSIDE_CHILDREN state for this line. The bit is set
// if any child frame has outside children.
if ((aLine->mCombinedArea.x < aLine->mBounds.x) ||
(aLine->mCombinedArea.XMost() > aLine->mBounds.XMost()) ||
(aLine->mCombinedArea.y < aLine->mBounds.y) ||
(aLine->mCombinedArea.YMost() > aLine->mBounds.YMost())) {
aLine->SetOutsideChildren();
}
else {
aLine->ClearOutsideChildren();
}
#endif
// Update xmost
nscoord xmost = aLine->mBounds.XMost();
if (xmost > aState.mKidXMost) {
aState.mKidXMost = xmost;
}
}
void
nsBlockFrame::DidPlaceLine(nsBlockReflowState& aState,
nsLineBox* aLine,
nscoord aTopMargin, nscoord aBottomMargin,
PRBool aLineReflowStatus)
{
// Place the outside list bullet, if we have one
if ((nsnull == mPrevInFlow) && (nsnull != mBullet) &&
ShouldPlaceBullet(aLine)) {
nscoord ascent = aState.mAscent;
if (aLine->IsBlock()) {
ascent = 0;
// For bullets that are placed next to a child block, there will
// be no correct ascent value. Therefore, make one up...
const nsStyleFont* font;
nsresult rv;
rv = aLine->mFirstChild->GetStyleData(eStyleStruct_Font,
(const nsStyleStruct*&) font);
if (NS_SUCCEEDED(rv) && (nsnull != font)) {
nsIRenderingContext& rc = *aState.rendContext;
rc.SetFont(font->mFont);
nsIFontMetrics* fm;
rv = rc.GetFontMetrics(fm);
if (NS_SUCCEEDED(rv) && (nsnull != fm)) {
fm->GetMaxAscent(ascent);
NS_RELEASE(fm);
}
}
}
PlaceBullet(aState, ascent, aTopMargin);
}
}
static nsresult
FindFloatersIn(nsIFrame* aFrame, nsVoidArray*& aArray)
{
const nsStyleDisplay* display;
aFrame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
if (NS_STYLE_FLOAT_NONE != display->mFloats) {
if (nsnull == aArray) {
aArray = new nsVoidArray();
if (nsnull == aArray) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
aArray->AppendElement(aFrame);
}
if (NS_STYLE_DISPLAY_INLINE == display->mDisplay) {
nsIFrame* kid;
aFrame->FirstChild(nsnull, &kid);
while (nsnull != kid) {
nsresult rv = FindFloatersIn(kid, aArray);
if (NS_OK != rv) {
return rv;
}
kid->GetNextSibling(kid);
}
}
return NS_OK;
}
void
nsBlockFrame::FindFloaters(nsLineBox* aLine)
{
nsVoidArray* floaters = aLine->mFloaters;
if (nsnull != floaters) {
// Empty floater array before proceeding
floaters->Clear();
}
nsIFrame* frame = aLine->mFirstChild;
PRInt32 n = aLine->ChildCount();
while (--n >= 0) {
FindFloatersIn(frame, floaters);
frame->GetNextSibling(frame);
}
aLine->mFloaters = floaters;
// Get rid of floater array if we don't need it
if (nsnull != floaters) {
if (0 == floaters->Count()) {
delete floaters;
aLine->mFloaters = nsnull;
}
}
}
void
nsBlockFrame::PushLines(nsBlockReflowState& aState)
{
NS_ASSERTION(nsnull != aState.mPrevLine, "bad push");
nsLineBox* lastLine = aState.mPrevLine;
nsLineBox* nextLine = lastLine->mNext;
lastLine->mNext = nsnull;
mOverflowLines = nextLine;
// Mark all the overflow lines dirty so that they get reflowed when
// they are pulled up by our next-in-flow.
while (nsnull != nextLine) {
nextLine->MarkDirty();
nextLine = nextLine->mNext;
}
// Break frame sibling list
nsIFrame* lastFrame = lastLine->LastChild();
lastFrame->SetNextSibling(nsnull);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::PushLines: line=%p prevInFlow=%p nextInFlow=%p",
mOverflowLines, mPrevInFlow, mNextInFlow));
#ifdef NS_DEBUG
if (GetVerifyTreeEnable()) {
//XXX VerifyChildCount(mLines);
//XXX VerifyChildCount(mOverflowLines, PR_TRUE);
}
#endif
}
PRBool
nsBlockFrame::DrainOverflowLines()
{
PRBool drained = PR_FALSE;
// First grab the prev-in-flows overflow lines
nsBlockFrame* prevBlock = (nsBlockFrame*) mPrevInFlow;
if (nsnull != prevBlock) {
nsLineBox* line = prevBlock->mOverflowLines;
if (nsnull != line) {
drained = PR_TRUE;
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::DrainOverflowLines: line=%p prevInFlow=%p",
line, prevBlock));
prevBlock->mOverflowLines = nsnull;
// Make all the frames on the mOverflowLines list mine
nsIFrame* lastFrame = nsnull;
nsIFrame* frame = line->mFirstChild;
while (nsnull != frame) {
frame->SetParent(this);
lastFrame = frame;
frame->GetNextSibling(frame);
}
// Join the line lists
if (nsnull == mLines) {
mLines = line;
}
else {
// Join the sibling lists together
lastFrame->SetNextSibling(mLines->mFirstChild);
// Place overflow lines at the front of our line list
nsLineBox* lastLine = nsLineBox::LastLine(line);
lastLine->mNext = mLines;
mLines = line;
}
}
}
// Now grab our own overflow lines
if (nsnull != mOverflowLines) {
// This can happen when we reflow and not everything fits and then
// we are told to reflow again before a next-in-flow is created
// and reflows.
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::DrainOverflowLines: from me, line=%p",
mOverflowLines));
nsLineBox* lastLine = nsLineBox::LastLine(mLines);
if (nsnull == lastLine) {
mLines = mOverflowLines;
}
else {
lastLine->mNext = mOverflowLines;
nsIFrame* lastFrame = lastLine->LastChild();
lastFrame->SetNextSibling(mOverflowLines->mFirstChild);
// Update our last-content-index now that we have a new last child
lastLine = nsLineBox::LastLine(mOverflowLines);
}
mOverflowLines = nsnull;
drained = PR_TRUE;
}
#ifdef NS_DEBUG
if (GetVerifyTreeEnable()) {
//XXX VerifyChildCount(mLines, PR_TRUE);
}
#endif
return drained;
}
//////////////////////////////////////////////////////////////////////
// Frame list manipulation routines
NS_IMETHODIMP
nsBlockFrame::AppendFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
if (nsnull != aListName) {
// XXX temporary until area frame code is updated
return nsFrame::AppendFrames(aPresContext, aPresShell, aListName, aFrameList);
}
nsresult rv = AppendNewFrames(aPresContext, aFrameList);
if (NS_SUCCEEDED(rv)) {
// RenumberLists(aState);
// rv = ComputeTextRuns(aState);
nsIReflowCommand* reflowCmd = nsnull;
nsresult rv;
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
nsIReflowCommand::FrameAppended,
nsnull);
if (NS_SUCCEEDED(rv)) {
if (nsnull != aListName) {
reflowCmd->SetChildListName(aListName);
}
aPresShell.AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
return rv;
}
nsresult
nsBlockFrame::AppendNewFrames(nsIPresContext& aPresContext,
nsIFrame* aNewFrame)
{
// Get our last line and then get its last child
nsIFrame* lastFrame;
nsLineBox* lastLine = nsLineBox::LastLine(mLines);
if (nsnull != lastLine) {
lastFrame = lastLine->LastChild();
} else {
lastFrame = nsnull;
}
// Add the new frames to the sibling list; wrap any frames that
// require wrapping
if (nsnull != lastFrame) {
lastFrame->SetNextSibling(aNewFrame);
}
nsresult rv;
// Make sure that new inlines go onto the end of the lastLine when
// the lastLine is mapping inline frames.
PRInt32 pendingInlines = 0;
if (nsnull != lastLine) {
if (!lastLine->IsBlock()) {
pendingInlines = 1;
}
}
// Now create some lines for the new frames
nsIFrame* prevFrame = lastFrame;
for (nsIFrame* frame = aNewFrame; nsnull != frame;
frame->GetNextSibling(frame)) {
// See if the child is a block or non-block
const nsStyleDisplay* kidDisplay;
rv = frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) kidDisplay);
if (NS_OK != rv) {
return rv;
}
const nsStylePosition* kidPosition;
rv = frame->GetStyleData(eStyleStruct_Position,
(const nsStyleStruct*&) kidPosition);
if (NS_OK != rv) {
return rv;
}
PRBool isBlock = nsLineLayout::TreatFrameAsBlock(kidDisplay, kidPosition);
// See if we need to move the frame outside of the flow, and insert a
// placeholder frame in its place
nsIFrame* placeholder;
if (MoveFrameOutOfFlow(aPresContext, frame, kidDisplay, kidPosition,
placeholder)) {
// Reset the previous frame's next sibling pointer
if (nsnull != prevFrame) {
prevFrame->SetNextSibling(placeholder);
}
// The placeholder frame is always inline
frame = placeholder;
isBlock = PR_FALSE;
}
else {
// Wrap the frame in a view if necessary
nsIStyleContext* kidSC;
frame->GetStyleContext(&kidSC);
rv = CreateViewForFrame(aPresContext, frame, kidSC, PR_FALSE);
NS_RELEASE(kidSC);
if (NS_OK != rv) {
return rv;
}
}
// If the child is an inline then add it to the lastLine (if it's
// an inline line, otherwise make a new line). If the child is a
// block then make a new line and put the child in that line.
if (isBlock) {
// If the previous line has pending inline data to be reflowed,
// do so now.
if (0 != pendingInlines) {
// Set this to true in case we don't end up reflowing all of the
// frames on the line (because they end up being pushed).
lastLine->MarkDirty();
pendingInlines = 0;
}
// Create a line for the block
nsLineBox* line = new nsLineBox(frame, 1, LINE_IS_BLOCK);
if (nsnull == line) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (nsnull == lastLine) {
mLines = line;
}
else {
lastLine->mNext = line;
}
lastLine = line;
}
else {
if (0 == pendingInlines) {
nsLineBox* line = new nsLineBox(frame, 0, 0);
if (nsnull == line) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (nsnull == lastLine) {
mLines = line;
}
else {
lastLine->mNext = line;
}
lastLine = line;
}
lastLine->mChildCount++;
pendingInlines++;
}
// Remember the previous frame
prevFrame = frame;
}
if (0 != pendingInlines) {
// Set this to true in case we don't end up reflowing all of the
// frames on the line (because they end up being pushed).
lastLine->MarkDirty();
}
MarkEmptyLines(aPresContext);
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::InsertFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
if (nsnull != aListName) {
// XXX temporary until area frame code is updated
return nsFrame::InsertFrames(aPresContext, aPresShell, aListName, aPrevFrame, aFrameList);
}
nsresult rv = InsertNewFrames(aPresContext, aFrameList, aPrevFrame);
if (NS_SUCCEEDED(rv)) {
nsIReflowCommand* reflowCmd = nsnull;
nsresult rv;
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
nsIReflowCommand::ReflowDirty,
nsnull);
if (NS_SUCCEEDED(rv)) {
if (nsnull != aListName) {
reflowCmd->SetChildListName(aListName);
}
aPresShell.AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
return rv;
}
// XXX rewrite to deal with a list of frames
nsresult
nsBlockFrame::InsertNewFrames(nsIPresContext& aPresContext,
nsIFrame* aFrameList,
nsIFrame* aPrevSibling)
{
if (nsnull == mLines) {
NS_ASSERTION(nsnull == aPrevSibling, "prev-sibling and empty line list!");
return AppendNewFrames(aPresContext, aFrameList);
}
nsIFrame* newFrame = aFrameList;
while (nsnull != newFrame) {
nsIFrame* next;
newFrame->GetNextSibling(next);
newFrame->SetNextSibling(nsnull);
const nsStyleDisplay* display;
newFrame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
const nsStylePosition* position;
newFrame->GetStyleData(eStyleStruct_Position,
(const nsStyleStruct*&) position);
PRUint16 newFrameIsBlock =
nsLineLayout::TreatFrameAsBlock(display, position)
? LINE_IS_BLOCK
: 0;
// See if we need to move the frame outside of the flow, and insert a
// placeholder frame in its place
nsIFrame* placeholder;
if (MoveFrameOutOfFlow(aPresContext, newFrame, display, position,
placeholder)) {
// Add the placeholder frame to the flow
newFrame = placeholder;
newFrameIsBlock = PR_FALSE; // placeholder frame is always inline
}
else {
// Wrap the frame in a view if necessary
nsIStyleContext* kidSC;
newFrame->GetStyleContext(&kidSC);
nsresult rv = CreateViewForFrame(aPresContext, newFrame, kidSC, PR_FALSE);
NS_RELEASE(kidSC);
if (NS_OK != rv) {
return rv;
}
}
// Insert/append the frame into flows line list at the right spot
nsLineBox* newLine;
nsLineBox* line = mLines;
if (nsnull == aPrevSibling) {
// Insert new frame into the sibling list
newFrame->SetNextSibling(line->mFirstChild);
if (line->IsBlock() || newFrameIsBlock) {
// Create a new line
newLine = new nsLineBox(newFrame, 1, newFrameIsBlock);
if (nsnull == newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
newLine->mNext = mLines;
mLines = newLine;
} else {
// Insert frame at the front of the line
line->mFirstChild = newFrame;
line->mChildCount++;
line->MarkDirty();
}
}
else {
// Find line containing the previous sibling to the new frame
line = nsLineBox::FindLineContaining(line, aPrevSibling);
NS_ASSERTION(nsnull != line, "no line contains the previous sibling");
if (nsnull != line) {
if (line->IsBlock()) {
// Create a new line just after line
newLine = new nsLineBox(newFrame, 1, newFrameIsBlock);
if (nsnull == newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
newLine->mNext = line->mNext;
line->mNext = newLine;
}
else if (newFrameIsBlock) {
// Split line in two, if necessary. We can't allow a block to
// end up in an inline line.
if (line->IsLastChild(aPrevSibling)) {
// The new frame goes after prevSibling and prevSibling is
// the last frame on the line. Therefore we don't need to
// split the line, just create a new line.
newLine = new nsLineBox(newFrame, 1, newFrameIsBlock);
if (nsnull == newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
newLine->mNext = line->mNext;
line->mNext = newLine;
}
else {
// The new frame goes after prevSibling and prevSibling is
// somewhere in the line, but not at the end. Split the line
// just after prevSibling.
PRInt32 i, n = line->ChildCount();
nsIFrame* frame = line->mFirstChild;
for (i = 0; i < n; i++) {
if (frame == aPrevSibling) {
nsIFrame* nextSibling;
aPrevSibling->GetNextSibling(nextSibling);
// Create new line to hold the remaining frames
NS_ASSERTION(n - i - 1 > 0, "bad line count");
newLine = new nsLineBox(nextSibling, n - i - 1, 0);
if (nsnull == newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
newLine->mNext = line->mNext;
line->mNext = newLine;
line->MarkDirty();
line->mChildCount = i + 1;
break;
}
frame->GetNextSibling(frame);
}
// Now create a new line to hold the block
newLine = new nsLineBox(newFrame, 1, newFrameIsBlock);
if (nsnull == newLine) {
return NS_ERROR_OUT_OF_MEMORY;
}
newLine->mNext = line->mNext;
line->mNext = newLine;
}
}
else {
// Insert frame into the line.
//XXX NS_ASSERTION(line->GetLastContentIsComplete(), "bad line LCIC");
line->mChildCount++;
line->MarkDirty();
}
}
// Insert new frame into the sibling list; note: this must be done
// after the above logic because the above logic depends on the
// sibling list being in the "before insertion" state.
nsIFrame* nextSibling;
aPrevSibling->GetNextSibling(nextSibling);
newFrame->SetNextSibling(nextSibling);
aPrevSibling->SetNextSibling(newFrame);
}
aPrevSibling = newFrame;
newFrame = next;
}
MarkEmptyLines(aPresContext);
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::RemoveFrame(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
if (nsnull != aListName) {
// XXX temporary until area frame code is updated
return nsFrame::RemoveFrame(aPresContext, aPresShell, aListName, aOldFrame);
}
nsresult rv = DoRemoveFrame(aPresContext, aOldFrame);
if (NS_SUCCEEDED(rv)) {
nsIReflowCommand* reflowCmd = nsnull;
nsresult rv;
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
nsIReflowCommand::ReflowDirty,
nsnull);
if (NS_SUCCEEDED(rv)) {
if (nsnull != aListName) {
reflowCmd->SetChildListName(aListName);
}
aPresShell.AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
return rv;
}
// XXX need code in here to join two inline lines together if a block
// is deleted between them.
nsresult
nsBlockFrame::DoRemoveFrame(nsIPresContext& aPresContext,
nsIFrame* aDeletedFrame)
{
// Find the line and the previous sibling that contains
// deletedFrame; we also find the pointer to the line.
nsBlockFrame* flow = this;
nsLineBox** linep = &flow->mLines;
nsLineBox* line = flow->mLines;
nsLineBox* prevLine = nsnull;
nsIFrame* prevSibling = nsnull;
while (nsnull != line) {
nsIFrame* frame = line->mFirstChild;
PRInt32 n = line->ChildCount();
while (--n >= 0) {
if (frame == aDeletedFrame) {
goto found_frame;
}
prevSibling = frame;
frame->GetNextSibling(frame);
}
linep = &line->mNext;
prevLine = line;
line = line->mNext;
}
found_frame:;
#ifdef NS_DEBUG
NS_ASSERTION(nsnull != line, "can't find deleted frame in lines");
if (nsnull != prevSibling) {
nsIFrame* tmp;
prevSibling->GetNextSibling(tmp);
NS_ASSERTION(tmp == aDeletedFrame, "bad prevSibling");
}
#endif
// Remove frame and all of its continuations
while (nsnull != aDeletedFrame) {
while ((nsnull != line) && (nsnull != aDeletedFrame)) {
#ifdef NS_DEBUG
nsIFrame* parent;
aDeletedFrame->GetParent(&parent);
NS_ASSERTION(flow == parent, "messed up delete code");
#endif
NS_FRAME_TRACE(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockFrame::ContentDeleted: deadFrame=%p", aDeletedFrame));
// See if the frame is a floater (actually, the floaters
// placeholder). If it is, then destroy the floated frame too.
const nsStyleDisplay* display;
nsresult rv = aDeletedFrame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)display);
if (NS_SUCCEEDED(rv) && (nsnull != display)) {
// XXX Sanitize "IsFloating" question *everywhere* (add a
// static method on nsFrame?)
if (NS_STYLE_FLOAT_NONE != display->mFloats) {
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) aDeletedFrame;
nsIFrame* floater = ph->GetAnchoredItem();
if (nsnull != floater) {
floater->DeleteFrame(aPresContext);
if (nsnull != line->mFloaters) {
// Wipe out the floater array for this line. It will get
// recomputed during reflow anyway.
delete line->mFloaters;
line->mFloaters = nsnull;
}
}
}
}
// Get the deleted frames next sibling
nsIFrame* nextFrame;
aDeletedFrame->GetNextSibling(nextFrame);
// Remove aDeletedFrame from the line
if (line->mFirstChild == aDeletedFrame) {
line->mFirstChild = nextFrame;
if (!line->IsBlock() && (nsnull != prevLine) && !prevLine->IsBlock()) {
// Make sure the previous line (if it's an inline line) gets
// a reflow too so that it can pullup from the line where we
// just removed the frame.
prevLine->MarkDirty();
}
}
// Take aDeletedFrame out of the sibling list. Note that
// prevSibling will only be nsnull when we are deleting the very
// first frame.
if (nsnull != prevSibling) {
prevSibling->SetNextSibling(nextFrame);
}
// Destroy frame; capture its next-in-flow first in case we need
// to destroy that too.
nsIFrame* nextInFlow;
aDeletedFrame->GetNextInFlow(nextInFlow);
if (nsnull != nextInFlow) {
aDeletedFrame->BreakFromNextFlow();
}
aDeletedFrame->DeleteFrame(aPresContext);
aDeletedFrame = nextInFlow;
// If line is empty, remove it now
nsLineBox* next = line->mNext;
if (0 == --line->mChildCount) {
*linep = next;
line->mNext = nsnull;
delete line;
}
else {
line->MarkDirty();
linep = &line->mNext;
}
prevLine = line;
line = next;
// See if we should keep looking in the current flow's line list.
if (nsnull != aDeletedFrame) {
if (aDeletedFrame != nextFrame) {
// The deceased frames continuation is not the next frame in
// the current flow's frame list. Therefore we know that the
// continuation is in a different parent. So break out of
// the loop so that we advance to the next parent.
#ifdef NS_DEBUG
nsIFrame* parent;
aDeletedFrame->GetParent(&parent);
NS_ASSERTION(parent != flow, "strange continuation");
#endif
break;
}
}
}
// Advance to next flow block if the frame has more continuations
if (nsnull != aDeletedFrame) {
flow = (nsBlockFrame*) flow->mNextInFlow;
NS_ASSERTION(nsnull != flow, "whoops, continuation without a parent");
prevLine = nsnull;
line = flow->mLines;
prevSibling = nsnull;
}
}
MarkEmptyLines(aPresContext);
return NS_OK;
}
static PRBool
IsEmptyLine(nsIPresContext& aPresContext, nsLineBox* aLine)
{
PRInt32 i, n = aLine->ChildCount();
nsIFrame* frame = aLine->mFirstChild;
for (i = 0; i < n; i++) {
nsIContent* content;
nsresult rv = frame->GetContent(&content);
if (NS_FAILED(rv) || (nsnull == content)) {
// If it doesn't have any content then this can't be an empty line
return PR_FALSE;
}
nsITextContent* tc;
rv = content->QueryInterface(kITextContentIID, (void**) &tc);
if (NS_FAILED(rv) || (nsnull == tc)) {
// If it's not text content then this can't be an empty line
NS_RELEASE(content);
return PR_FALSE;
}
const nsTextFragment* frag;
PRInt32 numFrags;
rv = tc->GetText(frag, numFrags);
if (NS_FAILED(rv)) {
NS_RELEASE(content);
NS_RELEASE(tc);
return PR_FALSE;
}
// If the text has any non-whitespace characters in it then the
// line is not an empty line.
while (--numFrags >= 0) {
PRInt32 len = frag->GetLength();
if (frag->Is2b()) {
const PRUnichar* cp = frag->Get2b();
const PRUnichar* end = cp + len;
while (cp < end) {
PRUnichar ch = *cp++;
if (!XP_IS_SPACE(ch)) {
NS_RELEASE(tc);
NS_RELEASE(content);
return PR_FALSE;
}
}
}
else {
const char* cp = frag->Get1b();
const char* end = cp + len;
while (cp < end) {
char ch = *cp++;
if (!XP_IS_SPACE(ch)) {
NS_RELEASE(tc);
NS_RELEASE(content);
return PR_FALSE;
}
}
}
frag++;
}
NS_RELEASE(tc);
NS_RELEASE(content);
frame->GetNextSibling(frame);
}
return PR_TRUE;
}
void
nsBlockFrame::MarkEmptyLines(nsIPresContext& aPresContext)
{
// PRE-formatted content considers whitespace significant
const nsStyleText* text;
GetStyleData(eStyleStruct_Text, (const nsStyleStruct*&) text);
if (NS_STYLE_WHITESPACE_PRE == text->mWhiteSpace) {
return;
}
PRBool afterBlock = PR_TRUE;
nsLineBox* line = mLines;
while (nsnull != line) {
if (line->IsBlock()) {
afterBlock = PR_TRUE;
}
else if (afterBlock) {
afterBlock = PR_FALSE;
// This is an inline line and it is immediately after a block
// (or its our first line). See if it contains nothing but
// collapsible text.
PRBool isEmpty = IsEmptyLine(aPresContext, line);
line->SetIsEmptyLine(isEmpty);
}
else {
line->SetIsEmptyLine(PR_FALSE);
}
line = line->mNext;
}
}
void
nsBlockFrame::DeleteChildsNextInFlow(nsIPresContext& aPresContext,
nsIFrame* aChild)
{
NS_PRECONDITION(IsChild(aChild), "bad geometric parent");
nsIFrame* nextInFlow;
nsBlockFrame* parent;
aChild->GetNextInFlow(nextInFlow);
NS_PRECONDITION(nsnull != nextInFlow, "null next-in-flow");
nextInFlow->GetParent((nsIFrame**)&parent);
// If the next-in-flow has a next-in-flow then delete it, too (and
// delete it first).
nsIFrame* nextNextInFlow;
nextInFlow->GetNextInFlow(nextNextInFlow);
if (nsnull != nextNextInFlow) {
parent->DeleteChildsNextInFlow(aPresContext, nextInFlow);
}
// Disconnect the next-in-flow from the flow list
nextInFlow->BreakFromPrevFlow();
// Remove nextInFlow from the parents line list. Also remove it from
// the sibling list.
if (RemoveChild(parent->mLines, nextInFlow)) {
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::DeleteNextInFlowsFor: frame=%p (from mLines)",
nextInFlow));
goto done;
}
// If we get here then we didn't find the child on the line list. If
// it's not there then it has to be on the overflow lines list.
if (nsnull != mOverflowLines) {
if (RemoveChild(parent->mOverflowLines, nextInFlow)) {
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::DeleteNextInFlowsFor: frame=%p (from overflow)",
nextInFlow));
goto done;
}
}
NS_NOTREACHED("can't find next-in-flow in overflow list");
done:;
// If the parent is us then we will finish reflowing and update the
// content offsets of our parents when we are a pseudo-frame; if the
// parent is not us then it's a next-in-flow which means it will get
// reflowed by our parent and fix its content offsets. So there.
// Delete the next-in-flow frame and adjust its parents child count
nextInFlow->DeleteFrame(aPresContext);
#ifdef NS_DEBUG
aChild->GetNextInFlow(nextInFlow);
NS_POSTCONDITION(nsnull == nextInFlow, "non null next-in-flow");
#endif
}
PRBool
nsBlockFrame::RemoveChild(nsLineBox* aLines, nsIFrame* aChild)
{
nsLineBox* line = aLines;
nsIFrame* prevChild = nsnull;
while (nsnull != line) {
nsIFrame* child = line->mFirstChild;
PRInt32 n = line->ChildCount();
while (--n >= 0) {
nsIFrame* nextChild;
child->GetNextSibling(nextChild);
if (child == aChild) {
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("nsBlockFrame::RemoveChild: line=%p frame=%p",
line, aChild));
// Continuations HAVE to be at the start of a line
NS_ASSERTION(child == line->mFirstChild, "bad continuation");
line->mFirstChild = nextChild;
if (0 == --line->mChildCount) {
line->mFirstChild = nsnull;
}
if (nsnull != prevChild) {
// When nextInFlow and it's continuation are in the same
// container then we remove the nextInFlow from the sibling
// list.
prevChild->SetNextSibling(nextChild);
}
return PR_TRUE;
}
prevChild = child;
child = nextChild;
}
line = line->mNext;
}
return PR_FALSE;
}
////////////////////////////////////////////////////////////////////////
// Floater support
void
nsBlockFrame::ReflowFloater(nsIPresContext& aPresContext,
nsBlockReflowState& aState,
nsIFrame* aFloaterFrame,
nsHTMLReflowState& aFloaterReflowState)
{
// If either dimension is constrained then get the border and
// padding values in advance.
nsMargin bp(0, 0, 0, 0);
if (aFloaterReflowState.HaveFixedContentWidth() ||
aFloaterReflowState.HaveFixedContentHeight()) {
nsHTMLReflowState::ComputeBorderPaddingFor(aFloaterFrame, &aState, bp);
}
// Compute the available width for the floater
if (aFloaterReflowState.HaveFixedContentWidth()) {
// When the floater has a contrained width, give it just enough
// space for its styled width plus its borders and paddings.
aFloaterReflowState.availableWidth = aFloaterReflowState.computedWidth + bp.left + bp.right;
}
else {
// CSS2 section 10.3.5: Floating non-replaced elements with an
// auto width have the computed value of zero. Therefore, don't
// bother reflowing them.
if (!NS_FRAME_IS_REPLACED(aFloaterReflowState.frameType)) {
// XXX Tables are weird and special, so check for them here...
const nsStyleDisplay* floaterDisplay;
aFloaterFrame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)floaterDisplay);
if (NS_STYLE_DISPLAY_TABLE != floaterDisplay->mDisplay) {
return;
}
}
aFloaterReflowState.availableWidth = NS_UNCONSTRAINEDSIZE;
}
// Compute the available height for the floater
if (aFloaterReflowState.HaveFixedContentHeight()) {
aFloaterReflowState.availableHeight = aFloaterReflowState.computedHeight + bp.top + bp.bottom;
}
else {
aFloaterReflowState.availableHeight = NS_UNCONSTRAINEDSIZE;
}
// Resize reflow the anchored item into the available space
nsIHTMLReflow* floaterReflow;
if (NS_OK == aFloaterFrame->QueryInterface(kIHTMLReflowIID,
(void**)&floaterReflow)) {
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
floaterReflow->WillReflow(aPresContext);
floaterReflow->Reflow(aPresContext, desiredSize, aFloaterReflowState,
status);
aFloaterFrame->SizeTo(desiredSize.width, desiredSize.height);
}
}
void
nsBlockReflowState::InitFloater(nsPlaceholderFrame* aPlaceholder)
{
// Set the geometric parent of the floater
nsIFrame* floater = aPlaceholder->GetAnchoredItem();
floater->SetParent(mBlock);
// Then add the floater to the current line and place it when
// appropriate
AddFloater(aPlaceholder, PR_TRUE);
}
// This is called by the line layout's AddFloater method when a
// place-holder frame is reflowed in a line. If the floater is a
// left-most child (it's x coordinate is at the line's left margin)
// then the floater is place immediately, otherwise the floater
// placement is deferred until the line has been reflowed.
void
nsBlockReflowState::AddFloater(nsPlaceholderFrame* aPlaceholder,
PRBool aInitialReflow)
{
// Update the current line's floater array
NS_ASSERTION(nsnull != mCurrentLine, "null ptr");
if (nsnull == mCurrentLine->mFloaters) {
mCurrentLine->mFloaters = new nsVoidArray();
}
mCurrentLine->mFloaters->AppendElement(aPlaceholder);
// Reflow the floater
nsIFrame* floater = aPlaceholder->GetAnchoredItem();
nsSize kidAvailSize(0, 0);
nsHTMLReflowState reflowState(mPresContext, floater, *this, kidAvailSize);
reflowState.lineLayout = nsnull;
if ((nsnull == reflowCommand) || (floater != mNextRCFrame)) {
// Stub out reflowCommand and repair reason in the reflowState
// when incremental reflow doesn't apply to the floater.
reflowState.reflowCommand = nsnull;
reflowState.reason = ((reason == eReflowReason_Initial) || aInitialReflow)
? eReflowReason_Initial
: eReflowReason_Resize;
}
mBlock->ReflowFloater(mPresContext, *this, floater, reflowState);
// Now place the floater immediately if possible. Otherwise stash it
// away in mPendingFloaters and place it later.
if (0 == mLineLayout->GetPlacedFrames()) {
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::AddFloater: IsLeftMostChild, placeHolder=%p",
aPlaceholder));
// Flush out pending bottom margin before placing floater
if (0 != mPrevBottomMargin) {
mY += mPrevBottomMargin;
mPrevBottomMargin = 0;
}
// Because we are in the middle of reflowing a placeholder frame
// within a line (and possibly nested in an inline frame or two
// that's a child of our block) we need to restore the space
// manager's translation to the space that the block resides in
// before placing the floater.
PRBool isLeftFloater;
nscoord ox, oy;
mSpaceManager->GetTranslation(ox, oy);
nscoord dx = ox - mSpaceManagerX;
nscoord dy = oy - mSpaceManagerY;
mSpaceManager->Translate(-dx, -dy);
PlaceFloater(aPlaceholder, isLeftFloater);
// Pass on updated available space to the current inline reflow engine
GetAvailableSpace();
mLineLayout->UpdateInlines(mAvailSpaceRect.x + mBorderPadding.left,
mY,
mAvailSpaceRect.width,
mAvailSpaceRect.height,
isLeftFloater);
// Restore coordinate system
mSpaceManager->Translate(dx, dy);
}
else {
// This floater will be placed after the line is done (it is a
// below current line floater).
NS_FRAME_LOG(NS_FRAME_TRACE_CHILD_REFLOW,
("nsBlockReflowState::AddFloater: pending, placeHolder=%p",
aPlaceholder));
mPendingFloaters.AppendElement(aPlaceholder);
}
}
PRBool
nsBlockReflowState::IsLeftMostChild(nsIFrame* aFrame)
{
for (;;) {
nsIFrame* parent;
aFrame->GetParent(&parent);
if (parent == mBlock) {
nsIFrame* child = mCurrentLine->mFirstChild;
PRInt32 n = mCurrentLine->ChildCount();
while ((nsnull != child) && (aFrame != child) && (--n >= 0)) {
nsSize size;
// Is the child zero-sized?
child->GetSize(size);
if (size.width > 0) {
// We found a non-zero sized child frame that precedes aFrame
return PR_FALSE;
}
child->GetNextSibling(child);
}
break;
}
else {
// See if there are any non-zero sized child frames that precede
// aFrame in the child list
nsIFrame* child;
parent->FirstChild(nsnull, &child);
while ((nsnull != child) && (aFrame != child)) {
nsSize size;
// Is the child zero-sized?
child->GetSize(size);
if (size.width > 0) {
// We found a non-zero sized child frame that precedes aFrame
return PR_FALSE;
}
child->GetNextSibling(child);
}
}
// aFrame is the left-most non-zero sized frame in its geometric parent.
// Walk up one level and check that its parent is left-most as well
aFrame = parent;
}
return PR_TRUE;
}
void
nsBlockReflowState::PlaceFloater(nsPlaceholderFrame* aPlaceholder,
PRBool& aIsLeftFloater)
{
// Save away the Y coordinate before placing the floater. We will
// restore mY at the end after placing the floater. This is
// necessary because any adjustments to mY during the floater
// placement are for the floater only, not for any non-floating
// content.
nscoord saveY = mY;
nsIFrame* floater = aPlaceholder->GetAnchoredItem();
// Get the type of floater
const nsStyleDisplay* floaterDisplay;
const nsStyleSpacing* floaterSpacing;
floater->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&)floaterDisplay);
floater->GetStyleData(eStyleStruct_Spacing,
(const nsStyleStruct*&)floaterSpacing);
// See if the floater should clear any preceeding floaters...
if (NS_STYLE_CLEAR_NONE != floaterDisplay->mBreakType) {
ClearFloaters(mY, floaterDisplay->mBreakType);
}
else {
// Get the band of available space
GetAvailableSpace();
}
// Get the floaters bounding box and margin information
nsRect region;
floater->GetRect(region);
nsMargin floaterMargin;
ComputeMarginFor(floater, this, floaterMargin);
// Adjust the floater size by its margin. That's the area that will
// impact the space manager.
region.width += floaterMargin.left + floaterMargin.right;
region.height += floaterMargin.top + floaterMargin.bottom;
// Find a place to place the floater. The CSS2 spec doesn't want
// floaters overlapping each other or sticking out of the containing
// block (CSS2 spec section 9.5.1, see the rule list).
NS_ASSERTION((NS_STYLE_FLOAT_LEFT == floaterDisplay->mFloats) ||
(NS_STYLE_FLOAT_RIGHT == floaterDisplay->mFloats),
"invalid float type");
// While there is not enough room for the floater, clear past
// other floaters until there is room (or the band is not impacted
// by a floater).
while ((mAvailSpaceRect.width < region.width) &&
(mAvailSpaceRect.width < mContentArea.width)) {
// The CSS2 spec says that floaters should be placed as high as
// possible. We accomodate this easily by noting that if the band
// is not the full width of the content area then it must have
// been impacted by a floater. And we know that the height of the
// band will be the height of the shortest floater, therefore we
// adjust mY by that distance and keep trying until we have enough
// space for this floater.
#ifdef NOISY_FLOATER_CLEARING
mBlock->ListTag(stdout);
printf(": clearing floater during floater placement: ");
printf("availWidth=%d regionWidth=%d,%d(w/o margins) contentWidth=%d\n",
mAvailSpaceRect.width, region.width,
region.width - floaterMargin.left - floaterMargin.right,
mContentArea.width);
#endif
mY += mAvailSpaceRect.height;
GetAvailableSpace();
}
// Assign an x and y coordinate to the floater. Note that the x,y
// coordinates are computed relative to the translation in the
// spacemanager which means that the impacted region will be
// inside the border/padding area.
if (NS_STYLE_FLOAT_LEFT == floaterDisplay->mFloats) {
aIsLeftFloater = PR_TRUE;
region.x = mAvailSpaceRect.x;
}
else {
aIsLeftFloater = PR_FALSE;
region.x = mAvailSpaceRect.XMost() - region.width;
// In case the floater is too big, don't go past the left edge
if (region.x < mAvailSpaceRect.x) {
region.x = mAvailSpaceRect.x;
}
}
region.y = mY - mBorderPadding.top;
if (region.y < 0) {
// CSS2 spec, 9.5.1 rule [4]: A floating box's outer top may not
// be higher than the top of its containing block.
// XXX It's not clear if it means the higher than the outer edge
// or the border edge or the inner edge?
region.y = 0;
}
// Place the floater in the space manager
mSpaceManager->AddRectRegion(floater, region);
// Set the origin of the floater frame, in frame coordinates. These
// coordinates are not relative to the spacemanager
// translation, therefore we have to factor in our border/padding.
floater->MoveTo(mBorderPadding.left + floaterMargin.left + region.x,
mBorderPadding.top + floaterMargin.top + region.y);
// Now restore mY
mY = saveY;
#ifdef NOISY_INCREMENTAL_REFLOW
if (reason == eReflowReason_Incremental) {
nsRect r;
floater->GetRect(r);
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("placed floater: ");
((nsFrame*)floater)->ListTag(stdout);
printf(" %d,%d,%d,%d\n", r.x, r.y, r.width, r.height);
}
#endif
}
/**
* Place below-current-line floaters.
*/
void
nsBlockReflowState::PlaceBelowCurrentLineFloaters(nsVoidArray* aFloaters)
{
NS_PRECONDITION(aFloaters->Count() > 0, "no floaters");
PRInt32 numFloaters = aFloaters->Count();
for (PRInt32 i = 0; i < numFloaters; i++) {
nsPlaceholderFrame* placeholderFrame = (nsPlaceholderFrame*)
aFloaters->ElementAt(i);
if (!IsLeftMostChild(placeholderFrame)) {
PRBool isLeftFloater;
PlaceFloater(placeholderFrame, isLeftFloater);
}
}
}
/**
* Place current-line floaters.
*/
void
nsBlockReflowState::PlaceCurrentLineFloaters(nsVoidArray* aFloaters)
{
NS_PRECONDITION(aFloaters->Count() > 0, "no floaters");
PRInt32 numFloaters = aFloaters->Count();
for (PRInt32 i = 0; i < numFloaters; i++) {
nsPlaceholderFrame* placeholderFrame = (nsPlaceholderFrame*)
aFloaters->ElementAt(i);
if (IsLeftMostChild(placeholderFrame)) {
PRBool isLeftFloater;
PlaceFloater(placeholderFrame, isLeftFloater);
}
}
}
void
nsBlockReflowState::ClearFloaters(nscoord aY, PRUint8 aBreakType)
{
#ifdef NOISY_INCREMENTAL_REFLOW
if (reason == eReflowReason_Incremental) {
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("clear floaters: in: mY=%d aY=%d(%d)\n",
mY, aY, aY - mBorderPadding.top);
}
#endif
nscoord newY = mCurrentBand.ClearFloaters(aY - mBorderPadding.top,
aBreakType);
mY = newY + mBorderPadding.top;
GetAvailableSpace();
#ifdef NOISY_INCREMENTAL_REFLOW
if (reason == eReflowReason_Incremental) {
nsFrame::IndentBy(stdout, gNoiseIndent);
printf("clear floaters: out: mY=%d(%d)\n",
mY, mY - mBorderPadding.top);
}
#endif
}
//////////////////////////////////////////////////////////////////////
// Painting, event handling
PRIntn
nsBlockFrame::GetSkipSides() const
{
PRIntn skip = 0;
if (nsnull != mPrevInFlow) {
skip |= 1 << NS_SIDE_TOP;
}
if (nsnull != mNextInFlow) {
skip |= 1 << NS_SIDE_BOTTOM;
}
return skip;
}
NS_IMETHODIMP
nsBlockFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
const nsStyleDisplay* disp = (const nsStyleDisplay*)
mStyleContext->GetStyleData(eStyleStruct_Display);
// Only paint the border and background if we're visible
if (disp->mVisible && (eFramePaintLayer_Underlay == aWhichLayer)) {
PRIntn skipSides = GetSkipSides();
const nsStyleColor* color = (const nsStyleColor*)
mStyleContext->GetStyleData(eStyleStruct_Color);
const nsStyleSpacing* spacing = (const nsStyleSpacing*)
mStyleContext->GetStyleData(eStyleStruct_Spacing);
// Paint background and border
nsRect rect(0, 0, mRect.width, mRect.height);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, *spacing, 0, 0);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, mStyleContext,
skipSides);
}
// If overflow is hidden then set the clip rect so that children
// don't leak out of us
if (NS_STYLE_OVERFLOW_HIDDEN == disp->mOverflow) {
PRBool clipState;
aRenderingContext.PushState();
aRenderingContext.SetClipRect(nsRect(0, 0, mRect.width, mRect.height),
nsClipCombine_kIntersect, clipState);
}
// Child elements have the opportunity to override the visibility
// property and display even if the parent is hidden
PaintFloaters(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
if (NS_STYLE_OVERFLOW_HIDDEN == disp->mOverflow) {
PRBool clipState;
aRenderingContext.PopState(clipState);
}
if (eFramePaintLayer_Overlay == aWhichLayer) {
// XXX CSS2's outline handling goes here
}
return NS_OK;
}
void
nsBlockFrame::PaintFloaters(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
for (nsLineBox* line = mLines; nsnull != line; line = line->mNext) {
nsVoidArray* floaters = line->mFloaters;
if (nsnull == floaters) {
continue;
}
PRInt32 i, n = floaters->Count();
for (i = 0; i < n; i++) {
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) floaters->ElementAt(i);
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
ph->GetAnchoredItem(), aWhichLayer);
}
}
}
void
nsBlockFrame::PaintChildren(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
for (nsLineBox* line = mLines; nsnull != line; line = line->mNext) {
// If the line has outside children or if the line intersects the
// dirty rect then paint the children in the line.
if (!((line->mCombinedArea.YMost() <= aDirtyRect.y) ||
(line->mCombinedArea.y >= aDirtyRect.YMost()))) {
nsIFrame* kid = line->mFirstChild;
PRInt32 n = line->ChildCount();
while (--n >= 0) {
PaintChild(aPresContext, aRenderingContext, aDirtyRect, kid,
aWhichLayer);
kid->GetNextSibling(kid);
}
}
}
if (eFramePaintLayer_Content == aWhichLayer) {
if (nsnull != mBullet) {
// Paint outside bullets manually
const nsStyleList* list = (const nsStyleList*)
mStyleContext->GetStyleData(eStyleStruct_List);
if (NS_STYLE_LIST_STYLE_POSITION_OUTSIDE == list->mListStylePosition) {
PaintChild(aPresContext, aRenderingContext, aDirtyRect, mBullet,
aWhichLayer);
}
}
}
}
NS_IMETHODIMP
nsBlockFrame::GetFrameForPoint(const nsPoint& aPoint, nsIFrame** aFrame)
{
nsresult rv = GetFrameForPointUsing(aPoint, nsnull, aFrame);
if (NS_OK == rv) {
return NS_OK;
}
if (nsnull != mBullet) {
rv = GetFrameForPointUsing(aPoint, nsLayoutAtoms::bulletList, aFrame);
if (NS_OK == rv) {
return NS_OK;
}
}
if (mFloaters.NotEmpty()) {
rv = GetFrameForPointUsing(aPoint, nsLayoutAtoms::floaterList, aFrame);
if (NS_OK == rv) {
return NS_OK;
}
}
*aFrame = this;
return NS_ERROR_FAILURE;
}
//////////////////////////////////////////////////////////////////////
// Debugging
#ifdef NS_DEBUG
static PRBool
InLineList(nsLineBox* aLines, nsIFrame* aFrame)
{
while (nsnull != aLines) {
nsIFrame* frame = aLines->mFirstChild;
PRInt32 n = aLines->ChildCount();
while (--n >= 0) {
if (frame == aFrame) {
return PR_TRUE;
}
frame->GetNextSibling(frame);
}
aLines = aLines->mNext;
}
return PR_FALSE;
}
static PRBool
InSiblingList(nsLineBox* aLine, nsIFrame* aFrame)
{
if (nsnull != aLine) {
nsIFrame* frame = aLine->mFirstChild;
while (nsnull != frame) {
if (frame == aFrame) {
return PR_TRUE;
}
frame->GetNextSibling(frame);
}
}
return PR_FALSE;
}
PRBool
nsBlockFrame::IsChild(nsIFrame* aFrame)
{
nsIFrame* parent;
aFrame->GetParent(&parent);
if (parent != (nsIFrame*)this) {
return PR_FALSE;
}
if (InLineList(mLines, aFrame) && InSiblingList(mLines, aFrame)) {
return PR_TRUE;
}
if (InLineList(mOverflowLines, aFrame) &&
InSiblingList(mOverflowLines, aFrame)) {
return PR_TRUE;
}
return PR_FALSE;
}
#endif
NS_IMETHODIMP
nsBlockFrame::VerifyTree() const
{
// XXX rewrite this
return NS_OK;
}
//----------------------------------------------------------------------
NS_IMETHODIMP
nsBlockFrame::SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
nsresult rv = AppendNewFrames(aPresContext, aChildList);
if (NS_FAILED(rv)) {
return rv;
}
// Create list bullet if this is a list-item. Note that this is done
// here so that RenumberLists will work (it needs the bullets to
// store the bullet numbers).
const nsStyleDisplay* styleDisplay;
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) styleDisplay);
if ((nsnull == mPrevInFlow) &&
(NS_STYLE_DISPLAY_LIST_ITEM == styleDisplay->mDisplay) &&
(nsnull == mBullet)) {
// Resolve style for the bullet frame
nsIStyleContext* kidSC;
kidSC = aPresContext.ResolvePseudoStyleContextFor(mContent,
nsHTMLAtoms::bulletPseudo, mStyleContext);
// Create bullet frame
mBullet = new nsBulletFrame;
if (nsnull == mBullet) {
NS_RELEASE(kidSC);
return NS_ERROR_OUT_OF_MEMORY;
}
mBullet->Init(aPresContext, mContent, this, kidSC);
NS_RELEASE(kidSC);
// If the list bullet frame should be positioned inside then add
// it to the flow now.
const nsStyleList* styleList;
GetStyleData(eStyleStruct_List, (const nsStyleStruct*&) styleList);
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE == styleList->mListStylePosition) {
InsertNewFrames(aPresContext, mBullet, nsnull);
}
}
// Lookup up the two pseudo style contexts
if (nsnull == mPrevInFlow) {
mFirstLineStyle = aPresContext.
ProbePseudoStyleContextFor(mContent, nsHTMLAtoms::firstLinePseudo,
mStyleContext);
mFirstLetterStyle = aPresContext.
ProbePseudoStyleContextFor(mContent, nsHTMLAtoms::firstLetterPseudo,
(nsnull != mFirstLineStyle
? mFirstLineStyle
: mStyleContext));
#ifdef NOISY_FIRST_LETTER
if (nsnull != mFirstLetterStyle) {
printf("block(%d)@%p: first-letter style found\n",
ContentIndexInContainer(this), this);
}
#endif
}
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::CreateContinuingFrame(nsIPresContext& aPresContext,
nsIFrame* aParent,
nsIStyleContext* aStyleContext,
nsIFrame*& aContinuingFrame)
{
nsBlockFrame* cf = new nsBlockFrame;
if (nsnull == cf) {
return NS_ERROR_OUT_OF_MEMORY;
}
cf->Init(aPresContext, mContent, aParent, aStyleContext);
cf->SetFlags(mFlags);
cf->AppendToFlow(this);
aContinuingFrame = cf;
return NS_OK;
}
void
nsBlockFrame::RenumberLists(nsBlockReflowState& aState)
{
// Setup initial list ordinal value
PRInt32 ordinal = 1;
nsIHTMLContent* hc;
if (mContent && (NS_OK == mContent->QueryInterface(kIHTMLContentIID, (void**) &hc))) {
nsHTMLValue value;
if (NS_CONTENT_ATTR_HAS_VALUE ==
hc->GetHTMLAttribute(nsHTMLAtoms::start, value)) {
if (eHTMLUnit_Integer == value.GetUnit()) {
ordinal = value.GetIntValue();
if (ordinal <= 0) {
ordinal = 1;
}
}
}
NS_RELEASE(hc);
}
aState.mNextListOrdinal = ordinal;
// Get to first-in-flow
nsBlockFrame* block = this;
while (nsnull != block->mPrevInFlow) {
block = (nsBlockFrame*) block->mPrevInFlow;
}
// For each flow-block...
while (nsnull != block) {
// For each frame in the flow-block...
nsIFrame* frame = block->mLines ? block->mLines->mFirstChild : nsnull;
while (nsnull != frame) {
// If the frame is a list-item and the frame implements our
// block frame API then get it's bullet and set the list item
// ordinal.
const nsStyleDisplay* display;
frame->GetStyleData(eStyleStruct_Display,
(const nsStyleStruct*&) display);
if (NS_STYLE_DISPLAY_LIST_ITEM == display->mDisplay) {
// Make certain that the frame isa block-frame in case
// something foriegn has crept in.
nsBlockFrame* listItem;
if (NS_OK == frame->QueryInterface(kBlockFrameCID,
(void**) &listItem)) {
if (nsnull != listItem->mBullet) {
aState.mNextListOrdinal =
listItem->mBullet->SetListItemOrdinal(aState.mNextListOrdinal);
}
}
}
frame->GetNextSibling(frame);
}
block = (nsBlockFrame*) block->mNextInFlow;
}
}
PRBool
nsBlockFrame::ShouldPlaceBullet(nsLineBox* aLine)
{
PRBool ok = PR_FALSE;
const nsStyleList* list;
GetStyleData(eStyleStruct_List, (const nsStyleStruct*&)list);
if (NS_STYLE_LIST_STYLE_POSITION_OUTSIDE == list->mListStylePosition) {
nsLineBox* line = mLines;
while (nsnull != line) {
if (line->mBounds.height > 0) {
if (aLine == line) {
ok = PR_TRUE;
break;
}
}
if (aLine == line) {
break;
}
line = line->mNext;
}
}
return ok;
}
void
nsBlockFrame::PlaceBullet(nsBlockReflowState& aState,
nscoord aMaxAscent,
nscoord aTopMargin)
{
// Reflow the bullet now
nsSize availSize;
availSize.width = NS_UNCONSTRAINEDSIZE;
availSize.height = NS_UNCONSTRAINEDSIZE;
nsHTMLReflowState reflowState(aState.mPresContext, mBullet, aState,
availSize, aState.mLineLayout);
nsHTMLReflowMetrics metrics(nsnull);
nsIHTMLReflow* htmlReflow;
nsresult rv = mBullet->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow);
if (NS_SUCCEEDED(rv)) {
nsReflowStatus status;
htmlReflow->WillReflow(aState.mPresContext);
htmlReflow->Reflow(aState.mPresContext, metrics, reflowState, status);
htmlReflow->DidReflow(aState.mPresContext, NS_FRAME_REFLOW_FINISHED);
}
// Place the bullet now; use its right margin to distance it
// from the rest of the frames in the line
nsMargin margin;
nsHTMLReflowState::ComputeMarginFor(mBullet, &aState, margin);
nscoord x = aState.mBorderPadding.left - margin.right - metrics.width;
// XXX This calculation may be wrong, especially if
// vertical-alignment occurs on the line!
nscoord y = aState.mBorderPadding.top + aMaxAscent -
metrics.ascent + aTopMargin;
mBullet->SetRect(nsRect(x, y, metrics.width, metrics.height));
}
void
nsBlockFrame::BuildFloaterList()
{
nsIFrame* head = nsnull;
nsIFrame* current = nsnull;
nsLineBox* line = mLines;
while (nsnull != line) {
if (nsnull != line->mFloaters) {
nsVoidArray& array = *line->mFloaters;
PRInt32 i, n = array.Count();
for (i = 0; i < n; i++) {
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) array[i];
nsIFrame* floater = ph->GetAnchoredItem();
if (nsnull == head) {
current = head = floater;
}
else {
current->SetNextSibling(floater);
current = floater;
}
}
}
line = line->mNext;
}
// Terminate end of floater list just in case a floater was removed
if (nsnull != current) {
current->SetNextSibling(nsnull);
}
mFloaters.SetFrames(head);
}
// XXX keep the text-run data in the first-in-flow of the block
nsresult
nsBlockFrame::ComputeTextRuns(nsBlockReflowState& aState)
{
// Destroy old run information first
nsTextRun::DeleteTextRuns(mTextRuns);
mTextRuns = nsnull;
aState.mLineLayout->ResetTextRuns();
// Ask each child that implements nsIInlineReflow to find its text runs
nsLineLayout& ll = *aState.mLineLayout;
nsLineBox* line = mLines;
while (nsnull != line) {
if (!line->IsBlock()) {
nsIFrame* frame = line->mFirstChild;
PRInt32 n = line->ChildCount();
while (--n >= 0) {
nsIHTMLReflow* hr;
if (NS_OK == frame->QueryInterface(kIHTMLReflowIID, (void**)&hr)) {
nsresult rv = hr->FindTextRuns(ll);
if (NS_OK != rv) {
return rv;
}
}
else {
// A frame that doesn't implement nsIHTMLReflow isn't text
// therefore it will end an open text run.
ll.EndTextRun();
}
frame->GetNextSibling(frame);
}
}
else {
// A frame that doesn't implement nsIInlineReflow isn't text
// therefore it will end an open text run.
ll.EndTextRun();
}
line = line->mNext;
}
ll.EndTextRun();
// Now take the text-runs away from the line layout engine.
mTextRuns = ll.TakeTextRuns();
return NS_OK;
}
void
nsBlockFrame::TakeRunInFrames(nsBlockFrame* aRunInFrame)
{
// Simply steal the run-in-frame's line list and make it our
// own. XXX Very similar to the logic in DrainOverflowLines...
nsLineBox* line = aRunInFrame->mLines;
// Make all the frames on the mOverflowLines list mine
nsIFrame* lastFrame = nsnull;
nsIFrame* frame = line->mFirstChild;
while (nsnull != frame) {
frame->SetParent(this);
lastFrame = frame;
frame->GetNextSibling(frame);
}
// Join the line lists
if (nsnull == mLines) {
mLines = line;
}
else {
// Join the sibling lists together
lastFrame->SetNextSibling(mLines->mFirstChild);
// Place overflow lines at the front of our line list
nsLineBox* lastLine = nsLineBox::LastLine(line);
lastLine->mNext = mLines;
mLines = line;
}
aRunInFrame->mLines = nsnull;
}
//----------------------------------------------------------------------
nsresult
NS_NewAnonymousBlockFrame(nsIFrame*& aNewFrame)
{
nsBlockFrame* it = new nsAnonymousBlockFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
aNewFrame = it;
return NS_OK;
}
nsAnonymousBlockFrame::nsAnonymousBlockFrame()
{
}
nsAnonymousBlockFrame::~nsAnonymousBlockFrame()
{
}
NS_IMETHODIMP
nsAnonymousBlockFrame::AppendFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
return mParent->AppendFrames(aPresContext, aPresShell, aListName,
aFrameList);
}
NS_IMETHODIMP
nsAnonymousBlockFrame::InsertFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
return mParent->InsertFrames(aPresContext, aPresShell, aListName,
aPrevFrame, aFrameList);
}
NS_IMETHODIMP
nsAnonymousBlockFrame::RemoveFrame(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
return mParent->RemoveFrame(aPresContext, aPresShell, aListName,
aOldFrame);
}
nsresult
nsAnonymousBlockFrame::AppendFrames2(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
return nsAnonymousBlockFrameSuper::AppendFrames(aPresContext, aPresShell,
aListName, aFrameList);
}
nsresult
nsAnonymousBlockFrame::InsertFrames2(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
return nsAnonymousBlockFrameSuper::InsertFrames(aPresContext, aPresShell,
aListName, aPrevFrame,
aFrameList);
}
nsresult
nsAnonymousBlockFrame::RemoveFrame2(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
return nsAnonymousBlockFrameSuper::RemoveFrame(aPresContext, aPresShell,
aListName, aOldFrame);
}
void
nsAnonymousBlockFrame::RemoveFirstFrame()
{
nsLineBox* line = mLines;
if (nsnull != line) {
nsIFrame* firstChild = line->mFirstChild;
// If the line has floaters on it, see if the frame being removed
// is a placeholder frame. If it is, then remove it from the lines
// floater array and from the block frames floater child list.
if (nsnull != line->mFloaters) {
// XXX UNTESTED!
nsPlaceholderFrame* placeholderFrame;
nsVoidArray& floaters = *line->mFloaters;
PRInt32 i, n = floaters.Count();
for (i = 0; i < n; i++) {
placeholderFrame = (nsPlaceholderFrame*) floaters[i];
if (firstChild == placeholderFrame) {
// Remove placeholder from the line's floater array
floaters.RemoveElementAt(i);
if (0 == floaters.Count()) {
delete line->mFloaters;
line->mFloaters = nsnull;
}
// Remove the floater from the block frames mFloaters list too
mFloaters.RemoveFrame(placeholderFrame->GetAnchoredItem());
break;
}
}
}
if (1 == line->mChildCount) {
// Remove line when last frame goes away
mLines = line->mNext;
delete line;
}
else {
// Remove frame from line and mark the line dirty
--line->mChildCount;
line->MarkDirty();
firstChild->GetNextSibling(line->mFirstChild);
}
// Break linkage to next child after stolen frame
firstChild->SetNextSibling(nsnull);
}
}
void
nsAnonymousBlockFrame::RemoveFramesFrom(nsIFrame* aFrame)
{
nsLineBox* line = mLines;
if (nsnull != line) {
// Chop the child sibling list into two pieces
nsFrameList tmp(line->mFirstChild);
nsIFrame* prevSibling = tmp.GetPrevSiblingFor(aFrame);
if (nsnull != prevSibling) {
// Chop the sibling list into two pieces
prevSibling->SetNextSibling(nsnull);
nsLineBox* prevLine = nsnull;
while (nsnull != line) {
nsIFrame* frame = line->mFirstChild;
PRInt32 i, n = line->mChildCount;
PRBool done = PR_FALSE;
for (i = 0; i < n; i++) {
if (frame == aFrame) {
// We just found the target frame (and the line its in and
// the previous line)
if (frame == line->mFirstChild) {
// No more children on this line, so let it get removed
prevLine->mNext = nsnull;
}
else {
// The only frames that remain on this line are the
// frames preceeding aFrame. Adjust the count to
// indicate that fact.
line->mChildCount = i;
// Remove the lines that follow this line
prevLine = line;
line = line->mNext;
prevLine->mNext = nsnull;
}
done = PR_TRUE;
break;
}
frame->GetNextSibling(frame);
}
if (done) {
break;
}
prevLine = line;
line = line->mNext;
}
}
// Remove all of the remaining lines
while (nsnull != line) {
nsLineBox* next = line->mNext;
delete line;
line = next;
}
}
}