's should take precedence over non
// auto-sided block elements. Therefore we don't honor the width,
// height, border or padding attributes (the parent has to not apply
// a margin for us also).
//
// Note that this is only done for html paragraphs. Its not
// appropriate to apply it to other containers, especially XML
// content!
PRBool isHTMLParagraph = 0 != (mState & NS_BLOCK_IS_HTML_PARAGRAPH);
if (isHTMLParagraph &&
(aReflowState.mStyleDisplay->mDisplay == NS_STYLE_DISPLAY_BLOCK) &&
(((0 == aState.mKidXMost) ||
(0 == aState.mKidXMost - borderPadding.left)) &&
(0 == aState.mY - borderPadding.top))) {
// Zero out most everything
aMetrics.width = 0;
aMetrics.height = 0;
aMetrics.ascent = 0;
aMetrics.descent = 0;
aMetrics.mCarriedOutBottomMargin = 0;
// Note: Don't zero out the max-element-sizes: they will be zero
// if this is truly empty, otherwise they won't because of a
// floater.
if (nsnull != aMetrics.maxElementSize) {
aMetrics.maxElementSize->width = aState.mMaxElementSize.width;
aMetrics.maxElementSize->height = aState.mMaxElementSize.height;
}
}
else {
// Compute final width
nscoord maxWidth = 0, maxHeight = 0;
nscoord minWidth = aState.mKidXMost + borderPadding.right;
if (!HaveAutoWidth(aReflowState)) {
// Use style defined width
aMetrics.width = borderPadding.left + aReflowState.mComputedWidth +
borderPadding.right;
// XXX quote css1 section here
if ((0 == aReflowState.mComputedWidth) && (aMetrics.width < minWidth)) {
aMetrics.width = minWidth;
}
// When style defines the width use it for the max-element-size
// because we can't shrink any smaller.
maxWidth = aMetrics.width;
}
else {
nscoord computedWidth = minWidth;
PRBool compact = PR_FALSE;
#if 0
if (NS_STYLE_DISPLAY_COMPACT == aReflowState.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->GetBreakType())
/*XXX && (computedWidth <= aState.mCompactMarginWidth) */
)) {
compact = PR_TRUE;
}
}
#endif
// There are two options here. We either shrink wrap around our
// contents or we fluff out to the maximum block width. Note:
// We always shrink wrap when given an unconstrained width.
if ((0 == (NS_BLOCK_SHRINK_WRAP & mState)) &&
!aState.mUnconstrainedWidth && !aState.mShrinkWrapWidth &&
!compact) {
// Set our width to the max width if we aren't already that
// wide. Note that the max-width has nothing to do with our
// contents (CSS2 section XXX)
computedWidth = borderPadding.left + aState.mContentArea.width +
borderPadding.right;
}
// See if we should compute our max element size
if (aState.mComputeMaxElementSize) {
// Adjust the computedWidth
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 in
maxWidth = aState.mKidXMost + borderPadding.right;
}
else {
// Add in border and padding dimensions to already computed
// max-element-size values.
maxWidth = aState.mMaxElementSize.width +
borderPadding.left + borderPadding.right;
}
if (computedWidth < maxWidth) {
computedWidth = maxWidth;
}
}
// Apply min/max values
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMaxWidth) {
nscoord computedMaxWidth = aReflowState.mComputedMaxWidth +
borderPadding.left + borderPadding.right;
if (computedWidth > computedMaxWidth) {
computedWidth = computedMaxWidth;
}
}
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMinWidth) {
nscoord computedMinWidth = aReflowState.mComputedMinWidth +
borderPadding.left + borderPadding.right;
if (computedWidth < computedMinWidth) {
computedWidth = computedMinWidth;
}
}
aMetrics.width = computedWidth;
// If we're shrink wrapping, then now that we know our final width we
// need to do horizontal alignment of the inline lines and make sure
// blocks are correctly sized and positioned. Any lines that need
// final adjustment will have been marked as dirty
if (aState.mShrinkWrapWidth && aState.mNeedResizeReflow) {
// If the parent reflow state is also shrink wrap width, then
// we don't need to do this, because it will reflow us after it
// calculates the final width
PRBool parentIsShrinkWrapWidth = PR_FALSE;
if (aReflowState.parentReflowState) {
if (NS_SHRINKWRAPWIDTH == aReflowState.parentReflowState->mComputedWidth) {
parentIsShrinkWrapWidth = PR_TRUE;
}
}
if (!parentIsShrinkWrapWidth) {
nsHTMLReflowState reflowState(aReflowState);
reflowState.mComputedWidth = aMetrics.width - borderPadding.left -
borderPadding.right;
reflowState.reason = eReflowReason_Resize;
reflowState.mSpaceManager->ClearRegions();
nscoord oldDesiredWidth = aMetrics.width;
nsBlockReflowState state(reflowState, aState.mPresContext, this, aMetrics,
NS_BLOCK_MARGIN_ROOT & mState);
ReflowDirtyLines(state);
aState.mY = state.mY;
NS_ASSERTION(oldDesiredWidth == aMetrics.width, "bad desired width");
}
}
}
if (aState.mShrinkWrapWidth) {
PRBool parentIsShrinkWrapWidth = PR_FALSE;
if (aReflowState.parentReflowState) {
if (NS_SHRINKWRAPWIDTH == aReflowState.parentReflowState->mComputedWidth) {
parentIsShrinkWrapWidth = PR_TRUE;
}
}
}
// Compute final height
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedHeight) {
// Use style defined height
aMetrics.height = borderPadding.top + aReflowState.mComputedHeight +
borderPadding.bottom;
// When style defines the height use it for the max-element-size
// because we can't shrink any smaller.
maxHeight = aMetrics.height;
// Don't carry out a bottom margin when our height is fixed
// unless the bottom of the last line adjoins the bottom of our
// content area.
if (!aState.mIsBottomMarginRoot) {
if (aState.mY + aState.mPrevBottomMargin != aMetrics.height) {
aState.mPrevBottomMargin = 0;
}
}
}
else {
nscoord autoHeight = aState.mY;
// Shrink wrap our height around our contents.
if (aState.mIsBottomMarginRoot) {
// When we are a bottom-margin root make sure that our last
// childs bottom margin is fully applied.
// XXX check for a fit
autoHeight += aState.mPrevBottomMargin;
}
autoHeight += borderPadding.bottom;
// Apply min/max values
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMaxHeight) {
nscoord computedMaxHeight = aReflowState.mComputedMaxHeight +
borderPadding.top + borderPadding.bottom;
if (autoHeight > computedMaxHeight) {
autoHeight = computedMaxHeight;
}
}
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMinHeight) {
nscoord computedMinHeight = aReflowState.mComputedMinHeight +
borderPadding.top + borderPadding.bottom;
if (autoHeight < computedMinHeight) {
autoHeight = computedMinHeight;
}
}
aMetrics.height = autoHeight;
if (aState.mComputeMaxElementSize) {
maxHeight = aState.mMaxElementSize.height +
borderPadding.top + borderPadding.bottom;
}
}
aMetrics.ascent = aMetrics.height;
aMetrics.descent = 0;
if (aState.mComputeMaxElementSize) {
// Store away the final value
aMetrics.maxElementSize->width = maxWidth;
aMetrics.maxElementSize->height = maxHeight;
}
// Return bottom margin information
aMetrics.mCarriedOutBottomMargin =
aState.mIsBottomMarginRoot ? 0 : aState.mPrevBottomMargin;
#ifdef DEBUG
if (CRAZY_WIDTH(aMetrics.width) || CRAZY_HEIGHT(aMetrics.height)) {
ListTag(stdout);
printf(": WARNING: desired:%d,%d\n", aMetrics.width, aMetrics.height);
}
if (aState.mComputeMaxElementSize &&
((maxWidth > aMetrics.width) || (maxHeight > aMetrics.height))) {
ListTag(stdout);
printf(": WARNING: max-element-size:%d,%d desired:%d,%d maxSize:%d,%d\n",
maxWidth, maxHeight, aMetrics.width, aMetrics.height,
aState.mReflowState.availableWidth,
aState.mReflowState.availableHeight);
}
#endif
#ifdef NOISY_MAX_ELEMENT_SIZE
if (aState.mComputeMaxElementSize) {
IndentBy(stdout, GetDepth());
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
printf("PASS1 ");
}
ListTag(stdout);
printf(": max-element-size:%d,%d desired:%d,%d maxSize:%d,%d\n",
maxWidth, maxHeight, aMetrics.width, aMetrics.height,
aState.mReflowState.availableWidth,
aState.mReflowState.availableHeight);
}
#endif
}
// If we're requested to update our maximum width, then compute it
if (aState.mComputeMaximumWidth) {
// We need to add in for the right border/padding
aMetrics.mMaximumWidth = aState.mMaximumWidth + borderPadding.right;
}
// Compute the combined area of our children
// XXX_perf: This can be done incrementally
nscoord xa = 0, ya = 0, xb = aMetrics.width, yb = aMetrics.height;
if (NS_STYLE_OVERFLOW_HIDDEN != aReflowState.mStyleDisplay->mOverflow) {
nsLineBox* line = mLines;
while (nsnull != line) {
// Compute min and max x/y values for the reflowed frame's
// combined areas
nsRect lineCombinedArea;
line->GetCombinedArea(&lineCombinedArea);
nscoord x = lineCombinedArea.x;
nscoord y = lineCombinedArea.y;
nscoord xmost = x + lineCombinedArea.width;
nscoord ymost = y + lineCombinedArea.height;
if (x < xa) {
xa = x;
}
if (xmost > xb) {
xb = xmost;
}
if (y < ya) {
ya = y;
}
if (ymost > yb) {
yb = ymost;
}
line = line->mNext;
}
// Factor the bullet in; normally the bullet will be factored into
// the line-box's combined area. However, if the line is a block
// line then it won't; if there are no lines, it won't. So just
// factor it in anyway (it can't hurt if it was already done).
if (mBullet) {
nsRect r;
mBullet->GetRect(r);
if (r.x < xa) xa = r.x;
if (r.y < ya) ya = r.y;
nscoord xmost = r.XMost();
if (xmost > xb) xb = xmost;
nscoord ymost = r.YMost();
if (ymost > yb) yb = ymost;
}
}
#ifdef NOISY_COMBINED_AREA
ListTag(stdout);
printf(": ca=%d,%d,%d,%d\n", xa, ya, xb-xa, yb-ya);
#endif
// If the combined area of our children exceeds our bounding box
// then set the NS_FRAME_OUTSIDE_CHILDREN flag, otherwise clear it.
aMetrics.mOverflowArea.x = xa;
aMetrics.mOverflowArea.y = ya;
aMetrics.mOverflowArea.width = xb - xa;
aMetrics.mOverflowArea.height = yb - ya;
if ((aMetrics.mOverflowArea.x < 0) ||
(aMetrics.mOverflowArea.y < 0) ||
(aMetrics.mOverflowArea.XMost() > aMetrics.width) ||
(aMetrics.mOverflowArea.YMost() > aMetrics.height)) {
mState |= NS_FRAME_OUTSIDE_CHILDREN;
}
else {
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
}
}
nsresult
nsBlockFrame::PrepareInitialReflow(nsBlockReflowState& aState)
{
PrepareResizeReflow(aState);
return NS_OK;
}
nsresult
nsBlockFrame::PrepareChildIncrementalReflow(nsBlockReflowState& aState)
{
// Determine the line being impacted
PRBool isFloater;
nsLineBox* prevLine;
nsLineBox* line = FindLineFor(aState.mNextRCFrame, &prevLine, &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);
}
// Figure out which line to mark dirty.
MarkLineDirty(line, prevLine);
return NS_OK;
}
nsresult
nsBlockFrame::MarkLineDirty(nsLineBox* aLine, nsLineBox* aPrevLine)
{
// If the line that was affected is a block then just mark it dirty
// so that we reflow it.
if (aLine->IsBlock()) {
aLine->MarkDirty();
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": mark line %p dirty\n", aLine);
}
#endif
}
else {
// Mark previous line dirty if its an inline line so that it can
// maybe pullup something from the line just affected.
if (aPrevLine && !aPrevLine->IsBlock()) {
aPrevLine->MarkDirty();
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": mark prev-line %p dirty\n", aPrevLine);
}
#endif
}
else {
aLine->MarkDirty();
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": mark line %p dirty\n", aLine);
}
#endif
}
}
return NS_OK;
}
nsresult
nsBlockFrame::UpdateBulletPosition(nsBlockReflowState& aState)
{
if (nsnull == mBullet) {
// Don't bother if there is no bullet
return NS_OK;
}
const nsStyleList* styleList;
GetStyleData(eStyleStruct_List, (const nsStyleStruct*&) styleList);
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE == styleList->mListStylePosition) {
if (HaveOutsideBullet()) {
// We now have an inside bullet, but used to have an outside
// bullet. Adjust the frame line list
nsLineBox* line = aState.NewLineBox(mBullet, 1, PR_FALSE);
if (!line) {
return NS_ERROR_OUT_OF_MEMORY;
}
line->mNext = mLines;
mLines = line;
}
mState &= ~NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
}
else {
if (!HaveOutsideBullet()) {
// We now have an outside bullet, but used to have an inside
// bullet. Take the bullet frame out of the first lines frame
// list.
if ((nsnull != mLines) && (mBullet == mLines->mFirstChild)) {
nsIFrame* next;
mBullet->GetNextSibling(&next);
mBullet->SetNextSibling(nsnull);
PRInt32 count = mLines->GetChildCount() - 1;
NS_ASSERTION(count >= 0, "empty line w/o bullet");
mLines->SetChildCount(count);
if (0 == count) {
nsLineBox* nextLine = mLines->mNext;
aState.FreeLineBox(mLines);
mLines = nextLine;
if (nsnull != nextLine) {
nextLine->MarkDirty();
}
}
else {
mLines->mFirstChild = next;
mLines->MarkDirty();
}
}
}
mState |= NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
}
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
return NS_OK;
}
nsresult
nsBlockFrame::PrepareStyleChangedReflow(nsBlockReflowState& aState)
{
nsresult rv = UpdateBulletPosition(aState);
// Mark everything dirty
nsLineBox* line = mLines;
while (nsnull != line) {
line->MarkDirty();
line = line->mNext;
}
return rv;
}
nsresult
nsBlockFrame::PrepareResizeReflow(nsBlockReflowState& aState)
{
// See if we can try and avoid marking all the lines as dirty
PRBool tryAndSkipLines = PR_FALSE;
// See if this is this a constrained resize reflow
if ((aState.mReflowState.reason == eReflowReason_Resize) &&
(NS_UNCONSTRAINEDSIZE != aState.mReflowState.availableWidth)) {
// If the text is left-aligned, then we try and avoid reflowing the lines
const nsStyleText* styleText = (const nsStyleText*)
mStyleContext->GetStyleData(eStyleStruct_Text);
if ((NS_STYLE_TEXT_ALIGN_LEFT == styleText->mTextAlign) ||
((NS_STYLE_TEXT_ALIGN_DEFAULT == styleText->mTextAlign) &&
(NS_STYLE_DIRECTION_LTR == aState.mReflowState.mStyleDisplay->mDirection))) {
tryAndSkipLines = PR_TRUE;
}
}
#ifdef DEBUG
if (gDisableResizeOpt) {
tryAndSkipLines = PR_FALSE;
}
if (gNoisyReflow) {
if (!tryAndSkipLines) {
const nsStyleText* mStyleText = (const nsStyleText*)
mStyleContext->GetStyleData(eStyleStruct_Text);
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": marking all lines dirty: reason=%d availWidth=%d textAlign=%d\n",
aState.mReflowState.reason,
aState.mReflowState.availableWidth,
mStyleText->mTextAlign);
}
}
#endif
nsLineBox* line = mLines;
if (tryAndSkipLines) {
// The line's bounds are relative to the border edge of the frame
nscoord newAvailWidth = aState.mReflowState.mComputedBorderPadding.left;
if (NS_SHRINKWRAPWIDTH == aState.mReflowState.mComputedWidth) {
newAvailWidth += aState.mReflowState.mComputedMaxWidth;
} else {
newAvailWidth += aState.mReflowState.mComputedWidth;
}
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": trying to avoid marking all lines dirty\n");
}
#endif
PRBool notWrapping = aState.mNoWrap;
while (nsnull != line) {
if (line->IsBlock()) {
// We have to let child blocks make their own decisions.
line->MarkDirty();
}
else {
// We can avoid reflowing *some* inline lines in some cases.
if (notWrapping) {
// When no-wrap is set then the only line-breaking that
// occurs for inline lines is triggered by BR elements or by
// newlines. Therefore, we don't need to reflow the line.
}
else if ((line->mNext && !line->HasBreak()) ||
line->HasFloaters() || line->IsImpactedByFloater() ||
line->HasPercentageChild() ||
(line->mBounds.XMost() > newAvailWidth)) {
// When an inline line has:
//
// - a next line and it doesn't end in a break, or
// - floaters, or
// - is impacted by a floater, or
// - is wider than the new available space
//
// Then we must reflow it.
line->MarkDirty();
}
#ifdef DEBUG
if (gNoisyReflow && !line->IsDirty() && !notWrapping) {
IndentBy(stdout, gNoiseIndent + 1);
printf("skipped: line=%p next=%p %s %s %s%s%s breakType=%d xmost=%d\n",
line, line->mNext,
line->IsBlock() ? "block" : "inline",
aState.mNoWrap ? "no-wrap" : "wrapping",
line->HasBreak() ? "has-break " : "",
line->HasFloaters() ? "has-floaters " : "",
line->IsImpactedByFloater() ? "impacted " : "",
line->GetBreakType(),
line->mBounds.XMost());
}
#endif
}
line = line->mNext;
}
}
else {
// Mark everything dirty
while (nsnull != line) {
line->MarkDirty();
line = line->mNext;
}
}
return NS_OK;
}
//----------------------------------------
nsLineBox*
nsBlockFrame::FindLineFor(nsIFrame* aFrame,
nsLineBox** aPrevLineResult,
PRBool* aIsFloaterResult)
{
nsLineBox* prevLine = nsnull;
nsLineBox* line = mLines;
PRBool isFloater = PR_FALSE;
while (nsnull != line) {
if (line->Contains(aFrame)) {
break;
}
if (line->HasFloaters()) {
nsFloaterCache* fc = line->GetFirstFloater();
while (fc) {
if (aFrame == fc->mPlaceholder->GetOutOfFlowFrame()) {
isFloater = PR_TRUE;
goto done;
}
fc = fc->Next();
}
}
prevLine = line;
line = line->mNext;
}
done:
*aIsFloaterResult = isFloater;
*aPrevLineResult = prevLine;
return line;
}
void
nsBlockFrame::RecoverStateFrom(nsBlockReflowState& aState,
nsLineBox* aLine,
nscoord aDeltaY,
nsRect* aDamageRect)
{
PRBool applyTopMargin = PR_FALSE;
if (aLine->IsBlock()) {
nsIFrame* framePrevInFlow;
aLine->mFirstChild->GetPrevInFlow(&framePrevInFlow);
if (nsnull == framePrevInFlow) {
applyTopMargin = ShouldApplyTopMargin(aState, aLine);
}
}
aState.RecoverStateFrom(aLine, applyTopMargin, aDeltaY, aDamageRect);
}
/**
* 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,
const nsRect& aOldCombinedArea,
nscoord aDeltaY)
{
// See if the line has a relevant combined area, and if it does if
// the combined area has changed.
nsRect lineCombinedArea;
aLine->GetCombinedArea(&lineCombinedArea);
if (lineCombinedArea != aLine->mBounds) {
if (lineCombinedArea != aOldCombinedArea) {
// The line's combined-area changed. Therefore we need to damage
// the lines below that were previously (or are now) impacted by
// the change. It's possible that a floater shrunk or grew so
// use the larger of the impacted area.
nscoord newYMost = lineCombinedArea.YMost();
nscoord oldYMost = aOldCombinedArea.YMost();
nscoord impactYB = newYMost < oldYMost ? oldYMost : newYMost;
nscoord impactYA = lineCombinedArea.y;
// Loop over each subsequent line and mark them dirty if they
// intersect the impacted area. 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 lineYA = next->mBounds.y + aDeltaY;
nscoord lineYB = lineYA + next->mBounds.height;
if ((lineYB >= impactYA) && (lineYA < impactYB)) {
next->MarkDirty();
}
next = next->mNext;
}
}
else {
// The line's combined area didn't change from last
// time. Therefore just sliding subsequent lines will work.
return;
}
}
if (aDeltaY) {
nsLineBox* next = aLine->mNext;
while (nsnull != next) {
if (!next->IsDirty()) {
// Cases we need to find:
//
// 1. the line was impacted by a floater and now isn't
// 2. the line wasn't impacted by a floater and now is
//
//XXXPerf: An optimization: if the line was and is completely
//impacted by a floater and the floater hasn't changed size,
//then we don't need to mark the line dirty.
aState.GetAvailableSpace(next->mBounds.y + aDeltaY);
PRBool wasImpactedByFloater = next->IsImpactedByFloater();
PRBool isImpactedByFloater = aState.IsImpactedByFloater();
if (wasImpactedByFloater != isImpactedByFloater) {
next->MarkDirty();
}
else if (isImpactedByFloater) {
//XXX: Maybe the floater itself changed size?
if (next->IsBlock()) {
//XXXPerf
// Case:
// It's possible that more/less of the line is impacted by
// the floater than last time. So reflow.
next->MarkDirty();
}
}
}
next = next->mNext;
}
}
}
static PRBool
WrappedLinesAreDirty(nsLineBox* aLine)
{
if (aLine->IsInline()) {
while (aLine->IsLineWrapped()) {
aLine = aLine->mNext;
if (!aLine) {
break;
}
NS_ASSERTION(!aLine->IsBlock(), "didn't expect a block line");
if (aLine->IsDirty()) {
// we found a continuing line that is dirty
return PR_TRUE;
}
}
}
return PR_FALSE;
}
/**
* Reflow the dirty lines
*/
nsresult
nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
{
nsresult rv = NS_OK;
PRBool keepGoing = PR_TRUE;
#ifdef DEBUG
if (gNoisyReflow) {
if (aState.mReflowState.reason == eReflowReason_Incremental) {
nsIReflowCommand::ReflowType type;
aState.mReflowState.reflowCommand->GetType(type);
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": incrementally reflowing dirty lines: type=%s(%d)",
kReflowCommandType[type], type);
}
else {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": reflowing dirty lines");
}
printf(" computedWidth=%d\n", aState.mReflowState.mComputedWidth);
gNoiseIndent++;
}
#endif
// Check whether this is an incremental reflow
PRBool incrementalReflow = aState.mReflowState.reason ==
eReflowReason_Incremental ||
aState.mReflowState.reason ==
eReflowReason_Dirty;
// Reflow the lines that are already ours
aState.mPrevLine = nsnull;
nsLineBox* line = mLines;
nscoord deltaY = 0;
while (nsnull != line) {
#ifdef DEBUG
if (gNoisyReflow) {
nsRect lca;
line->GetCombinedArea(&lca);
IndentBy(stdout, gNoiseIndent);
printf("line=%p mY=%d dirty=%s oldBounds={%d,%d,%d,%d} oldCombinedArea={%d,%d,%d,%d} deltaY=%d mPrevBottomMargin=%d\n",
line, aState.mY, line->IsDirty() ? "yes" : "no",
line->mBounds.x, line->mBounds.y,
line->mBounds.width, line->mBounds.height,
lca.x, lca.y, lca.width, lca.height,
deltaY, aState.mPrevBottomMargin);
gNoiseIndent++;
}
#endif
// If we're supposed to update our maximum width, then we'll also need to
// reflow this line if it's line wrapped and any of the continuing lines
// are dirty
if (line->IsDirty() || (aState.mComputeMaximumWidth && ::WrappedLinesAreDirty(line))) {
// 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;
nsRect oldCombinedArea;
line->GetCombinedArea(&oldCombinedArea);
// Reflow the dirty line. If it's an incremental reflow, then have
// it invalidate the dirty area
rv = ReflowLine(aState, line, &keepGoing, incrementalReflow);
if (NS_FAILED(rv)) {
return rv;
}
if (!keepGoing) {
if (0 == line->GetChildCount()) {
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, oldCombinedArea, 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
nsRect damageRect;
RecoverStateFrom(aState, line, deltaY, incrementalReflow ?
&damageRect : 0);
if (incrementalReflow && !damageRect.IsEmpty()) {
Invalidate(aState.mPresContext, damageRect);
}
}
#ifdef DEBUG
if (gNoisyReflow) {
gNoiseIndent--;
nsRect lca;
line->GetCombinedArea(&lca);
IndentBy(stdout, gNoiseIndent);
printf("line=%p mY=%d newBounds={%d,%d,%d,%d} newCombinedArea={%d,%d,%d,%d} deltaY=%d mPrevBottomMargin=%d\n",
line, aState.mY,
line->mBounds.x, line->mBounds.y,
line->mBounds.width, line->mBounds.height,
lca.x, lca.y, lca.width, lca.height,
deltaY, aState.mPrevBottomMargin);
}
#endif
// If this is an inline frame then its time to stop
aState.mPrevLine = line;
line = line->mNext;
aState.AdvanceToNextLine();
}
// 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->GetChildCount()) {
// The line is empty. Try the next one.
NS_ASSERTION(nsnull == line->mFirstChild, "bad empty line");
aState.FreeLineBox(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->GetChildCount();
while (--n >= 0) {
frame->SetParent(this);
// When pushing and pulling frames we need to check for whether any
// views need to be reparented
nsHTMLContainerFrame::ReparentFrameView(aState.mPresContext, frame, mNextInFlow, 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, incrementalReflow ?
PR_TRUE : PR_FALSE);
if (NS_FAILED(rv)) {
return rv;
}
if (!keepGoing) {
if (0 == line->GetChildCount()) {
DeleteLine(aState, line);
}
break;
}
// If this is an inline frame then its time to stop
aState.mPrevLine = line;
line = line->mNext;
aState.AdvanceToNextLine();
}
}
// Handle an odd-ball case: a list-item with no lines
if (mBullet && HaveOutsideBullet() && !mLines) {
nsHTMLReflowMetrics metrics(nsnull);
ReflowBullet(aState, metrics);
// There are no lines so we have to fake up some y motion so that
// we end up with *some* height.
aState.mY += metrics.height;
}
#ifdef DEBUG
if (gNoisyReflow) {
gNoiseIndent--;
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": done reflowing dirty lines (status=%x)\n",
aState.mReflowStatus);
}
#endif
return rv;
}
void
nsBlockFrame::DeleteLine(nsBlockReflowState& aState,
nsLineBox* aLine)
{
NS_PRECONDITION(0 == aLine->GetChildCount(), "can't delete !empty line");
if (0 == aLine->GetChildCount()) {
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;
}
aState.FreeLineBox(aLine);
}
}
/**
* 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* aKeepReflowGoing,
PRBool aDamageDirtyArea)
{
nsresult rv = NS_OK;
NS_ABORT_IF_FALSE(aLine->GetChildCount(), "reflowing empty line");
// Setup the line-layout for the new line
aState.mCurrentLine = aLine;
aLine->ClearDirty();
// Now that we know what kind of line we have, reflow it
nsRect oldCombinedArea;
aLine->GetCombinedArea(&oldCombinedArea);
if (aLine->IsBlock()) {
rv = ReflowBlockFrame(aState, aLine, aKeepReflowGoing);
// We expect blocks to damage any area inside their bounds that is
// dirty; however, if the frame changes size or position then we
// need to do some repainting
if (aDamageDirtyArea) {
nsRect lineCombinedArea;
aLine->GetCombinedArea(&lineCombinedArea);
if ((oldCombinedArea.x != lineCombinedArea.x) ||
(oldCombinedArea.y != lineCombinedArea.y)) {
// The block has moved, and so do be safe we need to repaint
// XXX We need to improve on this...
nsRect dirtyRect;
dirtyRect.UnionRect(oldCombinedArea, lineCombinedArea);
Invalidate(aState.mPresContext, dirtyRect);
} else {
if (oldCombinedArea.width != lineCombinedArea.width) {
nsRect dirtyRect;
// Just damage the vertical strip that was either added or went
// away
dirtyRect.x = PR_MIN(oldCombinedArea.XMost(),
lineCombinedArea.XMost());
dirtyRect.y = lineCombinedArea.y;
dirtyRect.width = PR_MAX(oldCombinedArea.XMost(),
lineCombinedArea.XMost()) -
dirtyRect.x;
dirtyRect.height = PR_MAX(oldCombinedArea.height,
lineCombinedArea.height);
Invalidate(aState.mPresContext, dirtyRect);
}
if (oldCombinedArea.height != lineCombinedArea.height) {
nsRect dirtyRect;
// Just damage the horizontal strip that was either added or went
// away
dirtyRect.x = lineCombinedArea.x;
dirtyRect.y = PR_MIN(oldCombinedArea.YMost(),
lineCombinedArea.YMost());
dirtyRect.width = PR_MAX(oldCombinedArea.width,
lineCombinedArea.width);
dirtyRect.height = PR_MAX(oldCombinedArea.YMost(),
lineCombinedArea.YMost()) -
dirtyRect.y;
Invalidate(aState.mPresContext, dirtyRect);
}
}
}
}
else {
aLine->SetLineWrapped(PR_FALSE);
// If we're supposed to update the maximum width, then we'll need to reflow
// the line with an unconstrained width (which will give us the new maximum
// width), then we'll reflow it again with the constrained width.
// We only do this if this is a beginning line, i.e., don't do this for
// lines associated with content that line wrapped (see ReflowDirtyLines()
// for details).
// XXX This approach doesn't work when floaters are involved in which case
// we'll either need to recover the floater state that applies to the
// unconstrained reflow or keep it around in a separate space manager...
PRBool isBeginningLine = !aState.mPrevLine || !aState.mPrevLine->IsLineWrapped();
if (aState.mComputeMaximumWidth && isBeginningLine) {
nscoord oldY = aState.mY;
nscoord oldPrevBottomMargin = aState.mPrevBottomMargin;
// First reflow the line with an unconstrained width
ReflowInlineFrames(aState, aLine, aKeepReflowGoing, PR_TRUE);
// Update the line's maximum width
aLine->mMaximumWidth = aLine->mBounds.XMost();
aState.UpdateMaximumWidth(aLine->mMaximumWidth);
// Remove any floaters associated with the line from the space
// manager
aLine->RemoveFloatersFromSpaceManager(aState.mSpaceManager);
// Now reflow the line again this time without having it compute
// the maximum width
aState.mY = oldY;
aState.mPrevBottomMargin = oldPrevBottomMargin;
rv = ReflowInlineFrames(aState, aLine, aKeepReflowGoing);
} else {
rv = ReflowInlineFrames(aState, aLine, aKeepReflowGoing);
}
// We don't really know what changed in the line, so use the union
// of the old and new combined areas
if (aDamageDirtyArea) {
nsRect combinedArea;
aLine->GetCombinedArea(&combinedArea);
nsRect dirtyRect;
dirtyRect.UnionRect(oldCombinedArea, combinedArea);
Invalidate(aState.mPresContext, dirtyRect);
}
}
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 of 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_ABORT_IF_FALSE(fromLine, "bad line to pull from");
NS_ABORT_IF_FALSE(fromLine->GetChildCount(), "empty line");
NS_ABORT_IF_FALSE(aLine->GetChildCount(), "empty line");
if (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;
aLine->SetChildCount(aLine->GetChildCount() + 1);
PRInt32 fromLineChildCount = fromLine->GetChildCount();
if (0 != --fromLineChildCount) {
// Mark line dirty now that we pulled a child
fromLine->SetChildCount(fromLineChildCount);
fromLine->MarkDirty();
frame->GetNextSibling(&fromLine->mFirstChild);
}
else {
// Free up the fromLine now that it's empty
*aFromList = fromLine->mNext;
aState.FreeLineBox(fromLine);
}
// Change geometric parents
if (aUpdateGeometricParent) {
// Before we set the new parent frame get the current parent
nsIFrame* oldParentFrame;
frame->GetParent(&oldParentFrame);
frame->SetParent(this);
// When pushing and pulling frames we need to check for whether any
// views need to be reparented
NS_ASSERTION(oldParentFrame != this, "unexpected parent frame");
nsHTMLContainerFrame::ReparentFrameView(aState.mPresContext, frame, oldParentFrame, 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);
}
// Stop pulling because we found a frame to pull
aStopPulling = PR_TRUE;
aFrameResult = frame;
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
}
return NS_OK;
}
static void
PlaceFrameView(nsIPresContext* aPresContext,
nsIFrame* aFrame)
{
nsIView* view;
aFrame->GetView(aPresContext, &view);
if (view) {
nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, aFrame, view, nsnull);
} else {
nsContainerFrame::PositionChildViews(aPresContext, aFrame);
}
}
void
nsBlockFrame::SlideLine(nsBlockReflowState& aState,
nsLineBox* aLine, nscoord aDY)
{
// Adjust line state
aLine->SlideBy(aDY);
// Adjust the frames in the line
nsIFrame* kid = aLine->mFirstChild;
if (!kid) {
return;
}
if (aLine->IsBlock()) {
nsRect r;
kid->GetRect(r);
if (aDY) {
r.y += aDY;
kid->SetRect(aState.mPresContext, r);
}
// Make sure the frame's view and any child views are updated
::PlaceFrameView(aState.mPresContext, kid);
// If the child has any floaters that impact the space-manager,
// place them now so that they are present in the space-manager
// again (they were removed by the space-manager's frame when
// the reflow began).
nsBlockFrame* bf;
nsresult rv = kid->QueryInterface(kBlockFrameCID, (void**) &bf);
if (NS_SUCCEEDED(rv)) {
// Translate spacemanager to the child blocks upper-left corner
// so that when it places its floaters (which are relative to
// it) the right coordinates are used. Note that we have already
// been translated by our border+padding so factor that in to
// get the right translation.
const nsMargin& bp = aState.BorderPadding();
nscoord dx = r.x - bp.left;
nscoord dy = r.y - bp.top;
aState.mSpaceManager->Translate(dx, dy);
bf->UpdateSpaceManager(aState.mPresContext, aState.mSpaceManager);
aState.mSpaceManager->Translate(-dx, -dy);
}
}
else {
// Adjust the Y coordinate of the frames in the line.
// Note: we need to re-position views even if aDY is 0, because
// one of our parent frames may have moved and so the view's position
// relative to its parent may have changed
nsRect r;
PRInt32 n = aLine->GetChildCount();
while (--n >= 0) {
if (aDY) {
kid->GetRect(r);
r.y += aDY;
kid->SetRect(aState.mPresContext, r);
}
// Make sure the frame's view and any child views are updated
::PlaceFrameView(aState.mPresContext, kid);
kid->GetNextSibling(&kid);
}
}
}
nsresult
nsBlockFrame::UpdateSpaceManager(nsIPresContext* aPresContext,
nsISpaceManager* aSpaceManager)
{
nsLineBox* line = mLines;
while (nsnull != line) {
// Place the floaters in the spacemanager
if (line->HasFloaters()) {
nsFloaterCache* fc = line->GetFirstFloater();
while (fc) {
nsIFrame* floater = fc->mPlaceholder->GetOutOfFlowFrame();
aSpaceManager->AddRectRegion(floater, fc->mRegion);
#ifdef NOISY_SPACEMANAGER
nscoord tx, ty;
aSpaceManager->GetTranslation(tx, ty);
nsFrame::ListTag(stdout, this);
printf(": UpdateSpaceManager: AddRectRegion: txy=%d,%d {%d,%d,%d,%d}\n",
tx, ty,
fc->mRegion.x, fc->mRegion.y,
fc->mRegion.width, fc->mRegion.height);
#endif
fc = fc->Next();
}
}
// Tell kids about the move too
if (line->mFirstChild && line->IsBlock()) {
// If the child has any floaters that impact the space-manager,
// place them now so that they are present in the space-manager
// again (they were removed by the space-manager's frame when
// the reflow began).
nsBlockFrame* bf;
nsresult rv = line->mFirstChild->QueryInterface(kBlockFrameCID,
(void**) &bf);
if (NS_SUCCEEDED(rv)) {
nsPoint origin;
bf->GetOrigin(origin);
// Translate spacemanager to the child blocks upper-left
// corner so that when it places its floaters (which are
// relative to it) the right coordinates are used.
aSpaceManager->Translate(origin.x, origin.y);
bf->UpdateSpaceManager(aPresContext, aSpaceManager);
aSpaceManager->Translate(-origin.x, -origin.y);
}
}
line = line->mNext;
}
return NS_OK;
}
NS_IMETHODIMP
nsBlockFrame::AttributeChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aHint)
{
nsresult rv = nsBlockFrameSuper::AttributeChanged(aPresContext, aChild,
aNameSpaceID, aAttribute, aHint);
if (NS_OK != rv) {
return rv;
}
if (nsHTMLAtoms::start == aAttribute) {
// XXX Not sure if this is necessary anymore
RenumberLists();
nsCOMPtr ... ). This is where
// the second case can happen.
if (HaveOutsideBullet() &&
((aLine == mLines) ||
((0 == mLines->mBounds.height) && (aLine == mLines->mNext)))) {
// Reflow the bullet
nsHTMLReflowMetrics metrics(nsnull);
ReflowBullet(aState, metrics);
// For bullets that are placed next to a child block, there will
// be no correct ascent value. Therefore, make one up...
nscoord ascent = 0;
const nsStyleFont* font;
frame->GetStyleData(eStyleStruct_Font,
(const nsStyleStruct*&) font);
nsIRenderingContext& rc = *aState.mReflowState.rendContext;
rc.SetFont(font->mFont);
nsIFontMetrics* fm;
rv = rc.GetFontMetrics(fm);
if (NS_SUCCEEDED(rv) && (nsnull != fm)) {
fm->GetMaxAscent(ascent);
NS_RELEASE(fm);
}
rv = NS_OK;
// Tall bullets won't look particularly nice here...
nsRect bbox;
mBullet->GetRect(bbox);
nscoord bulletTopMargin = applyTopMargin ? collapsedBottomMargin : 0;
bbox.y = aState.BorderPadding().top + ascent -
metrics.ascent + bulletTopMargin;
mBullet->SetRect(aState.mPresContext, bbox);
}
}
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;
}
}
}
#ifdef DEBUG
VerifyLines(PR_TRUE);
#endif
return rv;
}
#define LINE_REFLOW_OK 0
#define LINE_REFLOW_STOP 1
#define LINE_REFLOW_REDO 2
nsresult
nsBlockFrame::ReflowInlineFrames(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool* aKeepReflowGoing,
PRBool aUpdateMaximumWidth)
{
nsresult rv = NS_OK;
*aKeepReflowGoing = PR_TRUE;
#ifdef DEBUG
PRInt32 spins = 0;
#endif
PRUint8 lineReflowStatus = LINE_REFLOW_REDO;
while (LINE_REFLOW_REDO == lineReflowStatus) {
// Prevent overflowing limited thread stacks by creating
// nsLineLayout from the heap when the frame tree depth gets
// large.
if (aState.mReflowState.mReflowDepth > 30) {//XXX layout-tune.h?
rv = DoReflowInlineFramesMalloc(aState, aLine, aKeepReflowGoing,
&lineReflowStatus,
aUpdateMaximumWidth);
}
else {
rv = DoReflowInlineFramesAuto(aState, aLine, aKeepReflowGoing,
&lineReflowStatus,
aUpdateMaximumWidth);
}
if (NS_FAILED(rv)) {
break;
}
#ifdef DEBUG
spins++;
if (1000 == spins) {
ListTag(stdout);
printf(": yikes! spinning on a line over 1000 times!\n");
NS_ABORT();
}
#endif
}
return rv;
}
nsresult
nsBlockFrame::DoReflowInlineFramesMalloc(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool* aKeepReflowGoing,
PRUint8* aLineReflowStatus,
PRBool aUpdateMaximumWidth)
{
nsLineLayout* ll = new nsLineLayout(aState.mPresContext,
aState.mReflowState.mSpaceManager,
&aState.mReflowState,
aState.mComputeMaxElementSize);
if (!ll) {
return NS_ERROR_OUT_OF_MEMORY;
}
ll->Init(&aState, aState.mMinLineHeight, aState.mLineNumber);
ll->SetReflowTextRuns(mTextRuns);
nsresult rv = DoReflowInlineFrames(aState, *ll, aLine, aKeepReflowGoing,
aLineReflowStatus, aUpdateMaximumWidth);
ll->EndLineReflow();
delete ll;
return rv;
}
nsresult
nsBlockFrame::DoReflowInlineFramesAuto(nsBlockReflowState& aState,
nsLineBox* aLine,
PRBool* aKeepReflowGoing,
PRUint8* aLineReflowStatus,
PRBool aUpdateMaximumWidth)
{
nsLineLayout lineLayout(aState.mPresContext,
aState.mReflowState.mSpaceManager,
&aState.mReflowState,
aState.mComputeMaxElementSize);
lineLayout.Init(&aState, aState.mMinLineHeight, aState.mLineNumber);
lineLayout.SetReflowTextRuns(mTextRuns);
nsresult rv = DoReflowInlineFrames(aState, lineLayout, aLine,
aKeepReflowGoing, aLineReflowStatus,
aUpdateMaximumWidth);
lineLayout.EndLineReflow();
return rv;
}
nsresult
nsBlockFrame::DoReflowInlineFrames(nsBlockReflowState& aState,
nsLineLayout& aLineLayout,
nsLineBox* aLine,
PRBool* aKeepReflowGoing,
PRUint8* aLineReflowStatus,
PRBool aUpdateMaximumWidth)
{
// Forget all of the floaters on the line
aLine->FreeFloaters(aState.mFloaterCacheFreeList);
aState.mFloaterCombinedArea.SetRect(0, 0, 0, 0);
aState.mRightFloaterCombinedArea.SetRect(0, 0, 0, 0);
// Setup initial coordinate system for reflowing the inline frames
// into. Apply a previous block frame's bottom margin first.
aState.mY += aState.mPrevBottomMargin;
aState.GetAvailableSpace();
PRBool impactedByFloaters = aState.IsImpactedByFloater();
aLine->SetLineIsImpactedByFloater(impactedByFloaters);
const nsMargin& borderPadding = aState.BorderPadding();
nscoord x = aState.mAvailSpaceRect.x + borderPadding.left;
nscoord availWidth = aState.mAvailSpaceRect.width;
nscoord availHeight;
if (aState.mUnconstrainedHeight) {
availHeight = NS_UNCONSTRAINEDSIZE;
}
else {
/* XXX get the height right! */
availHeight = aState.mAvailSpaceRect.height;
}
if (aUpdateMaximumWidth) {
availWidth = NS_UNCONSTRAINEDSIZE;
}
aLineLayout.BeginLineReflow(x, aState.mY,
availWidth, availHeight,
impactedByFloaters,
PR_FALSE /*XXX isTopOfPage*/);
// XXX Unfortunately we need to know this before reflowing the first
// inline frame in the line. FIX ME.
if ((0 == aLineLayout.GetLineNumber()) &&
(NS_BLOCK_HAS_FIRST_LETTER_STYLE & mState)) {
aLineLayout.SetFirstLetterStyleOK(PR_TRUE);
}
// Reflow the frames that are already on the line first
nsresult rv = NS_OK;
PRUint8 lineReflowStatus = LINE_REFLOW_OK;
PRInt32 i;
nsIFrame* frame = aLine->mFirstChild;
for (i = 0; i < aLine->GetChildCount(); i++) {
rv = ReflowInlineFrame(aState, aLineLayout, aLine, frame,
&lineReflowStatus);
if (NS_FAILED(rv)) {
return rv;
}
if (LINE_REFLOW_OK != lineReflowStatus) {
// It is possible that one or more of next lines are empty
// (because of DeleteChildsNextInFlow). If so, delete them now
// in case we are finished.
nsLineBox* nextLine = aLine->mNext;
while ((nsnull != nextLine) && (0 == nextLine->GetChildCount())) {
// XXX Is this still necessary now that DeleteChildsNextInFlow
// uses DoRemoveFrame?
aLine->mNext = nextLine->mNext;
NS_ASSERTION(nsnull == nextLine->mFirstChild, "bad empty line");
aState.FreeLineBox(nextLine);
nextLine = aLine->mNext;
}
break;
}
frame->GetNextSibling(&frame);
}
// Pull frames and reflow them until we can't
while (LINE_REFLOW_OK == lineReflowStatus) {
rv = PullFrame(aState, aLine, frame);
if (NS_FAILED(rv)) {
return rv;
}
if (nsnull == frame) {
break;
}
while (LINE_REFLOW_OK == lineReflowStatus) {
PRInt32 oldCount = aLine->GetChildCount();
rv = ReflowInlineFrame(aState, aLineLayout, aLine, frame,
&lineReflowStatus);
if (NS_FAILED(rv)) {
return rv;
}
if (aLine->GetChildCount() != oldCount) {
// We just created a continuation for aFrame AND its going
// to end up on this line (e.g. :first-letter
// situation). Therefore we have to loop here before trying
// to pull another frame.
frame->GetNextSibling(&frame);
}
else {
break;
}
}
}
if (LINE_REFLOW_REDO == lineReflowStatus) {
// This happens only when we have a line that is impacted by
// floaters and the first element in the line doesn't fit with
// the floaters.
//
// What we do is to advance past the first floater we find and
// then reflow the line all over again.
NS_ASSERTION(aState.IsImpactedByFloater(),
"redo line on totally empty line");
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mAvailSpaceRect.height,
"unconstrained height on totally empty line");
aState.mY += aState.mAvailSpaceRect.height;
// XXX: a small optimization can be done here when paginating:
// if the new Y coordinate is past the end of the block then
// push the line and return now instead of later on after we are
// past the floater.
}
else {
// 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, aLineLayout, aLine, aKeepReflowGoing, aUpdateMaximumWidth);
}
}
*aLineReflowStatus = lineReflowStatus;
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's break-type will be set
* to something other than NS_STYLE_CLEAR_NONE.
*/
nsresult
nsBlockFrame::ReflowInlineFrame(nsBlockReflowState& aState,
nsLineLayout& aLineLayout,
nsLineBox* aLine,
nsIFrame* aFrame,
PRUint8* aLineReflowStatus)
{
*aLineReflowStatus = LINE_REFLOW_OK;
// 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 = aLineLayout.GetFirstLetterStyleOK();
#ifdef NOISY_FIRST_LETTER
ListTag(stdout);
printf(": reflowing ");
nsFrame::ListTag(stdout, aFrame);
printf(" reflowingFirstLetter=%s\n", reflowingFirstLetter ? "on" : "off");
#endif
// Reflow the inline frame
nsReflowStatus frameReflowStatus;
PRBool pushedFrame;
nsresult rv = aLineLayout.ReflowFrame(aFrame, &aState.mNextRCFrame,
frameReflowStatus, nsnull, pushedFrame);
if (NS_FAILED(rv)) {
return rv;
}
#ifdef REALLY_NOISY_REFLOW_CHILD
nsFrame::ListTag(stdout, aFrame);
printf(": status=%x\n", frameReflowStatus);
#endif
#if defined(REFLOW_STATUS_COVERAGE)
RecordReflowStatus(PR_FALSE, frameReflowStatus);
#endif
// Send post-reflow notification
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->SetBreakType(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).
*aLineReflowStatus = LINE_REFLOW_STOP;
// XXX what should aLine's break-type 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) {
// If we break before the first frame on the line then we must
// be trying to place content where theres no room (e.g. on a
// line with wide floaters). Inform the caller to reflow the
// line after skipping past a floater.
*aLineReflowStatus = LINE_REFLOW_REDO;
}
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, aLineLayout, aLine, aFrame);
if (NS_FAILED(rv)) {
return rv;
}
// If we're splitting the line because the frame didn't fit and it
// was pushed, then mark the line as having word wrapped. We need to
// know that if we're shrink wrapping our width
if (pushedFrame) {
aLine->SetLineWrapped(PR_TRUE);
}
}
}
else {
// Break-after cases
if (breakType == NS_STYLE_CLEAR_LINE) {
if (!aLineLayout.GetLineEndsInBR()) {
breakType = NS_STYLE_CLEAR_NONE;
}
}
aLine->SetBreakType(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;
}
// Remember that the line has wrapped
aLine->SetLineWrapped(PR_TRUE);
}
// Split line, but after the frame just reflowed
nsIFrame* nextFrame;
aFrame->GetNextSibling(&nextFrame);
rv = SplitLine(aState, aLineLayout, aLine, nextFrame);
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;
}
// Remember that the line has wrapped
aLine->SetLineWrapped(PR_TRUE);
// If we are reflowing the first letter frame then don't split the
// line and don't stop the line reflow...
PRBool splitLine = !reflowingFirstLetter;
if (reflowingFirstLetter) {
nsCOMPtr ... ).
//
// For this code, only the first case is possible because this
// method is used for placing a line of inline frames. If the rare
// case is happening then the worst that will happen is that the
// bullet frame will be reflowed twice.
PRBool addedBullet = PR_FALSE;
if (HaveOutsideBullet() && (aLine == mLines) &&
(!aLineLayout.IsZeroHeight() || !aLine->mNext)) {
nsHTMLReflowMetrics metrics(nsnull);
ReflowBullet(aState, metrics);
aLineLayout.AddBulletFrame(mBullet, metrics);
addedBullet = PR_TRUE;
}
nsSize maxElementSize;
aLineLayout.VerticalAlignFrames(aLine->mBounds, maxElementSize);
// See if we're shrink wrapping the width
if (aState.mShrinkWrapWidth) {
// When determining the line's width we also need to include any
// right floaters that impact us. This represents the shrink wrap
// width of the line
if (aState.IsImpactedByFloater() && !aLine->IsLineWrapped()) {
NS_ASSERTION(aState.mContentArea.width >= aState.mAvailSpaceRect.XMost(), "bad state");
aLine->mBounds.width += aState.mContentArea.width - aState.mAvailSpaceRect.XMost();
}
}
#ifdef DEBUG
{
static nscoord lastHeight = 0;
if (CRAZY_HEIGHT(aLine->mBounds.y)) {
lastHeight = aLine->mBounds.y;
if (abs(aLine->mBounds.y - lastHeight) > CRAZY_H/10) {
nsFrame::ListTag(stdout);
printf(": line=%p y=%d line.bounds.height=%d\n",
aLine, aLine->mBounds.y, aLine->mBounds.height);
}
}
else {
lastHeight = 0;
}
}
#endif
// Only block frames horizontally align their children because
// inline frames "shrink-wrap" around their children (therefore
// there is no extra horizontal space).
#if XXX_fix_me
PRBool allowJustify = PR_TRUE;
if (NS_STYLE_TEXT_ALIGN_JUSTIFY == aState.mStyleText->mTextAlign) {
allowJustify = ShouldJustifyLine(aState, aLine);
}
#else
PRBool allowJustify = PR_FALSE;
#endif
PRBool successful;
nsRect combinedArea;
successful = aLineLayout.HorizontalAlignFrames(aLine->mBounds, allowJustify,
aState.mShrinkWrapWidth);
if (!successful) {
// Mark the line dirty and then later once we've determined the width
// we can do the horizontal alignment
aLine->MarkDirty();
aState.mNeedResizeReflow = PR_TRUE;
}
aLineLayout.RelativePositionFrames(combinedArea);
aLine->SetCombinedArea(combinedArea);
if (addedBullet) {
aLineLayout.RemoveBulletFrame(mBullet);
}
// Inline lines do not have margins themselves; however they are
// impacted by prior block margins. If this line ends up having some
// height then we zero out the previous bottom margin value that was
// already applied to the line's starting Y coordinate. Otherwise we
// leave it be so that the previous blocks bottom margin can be
// collapsed with a block that follows.
nscoord newY;
if (aLine->mBounds.height > 0) {
// This line has some height. Therefore the application of the
// previous-bottom-margin should stick.
aState.mPrevBottomMargin = 0;
newY = aLine->mBounds.YMost();
}
else {
// Don't let the previous-bottom-margin value affect the newY
// coordinate (it was applied in ReflowInlineFrames speculatively)
// since the line is empty.
nscoord dy = -aState.mPrevBottomMargin;
newY = aState.mY + dy;
aLine->SlideBy(dy);
}
// See if the line fit. If it doesn't we need to push it. Our first
// line will always fit.
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;
}
aState.mY = newY;
if (aState.mComputeMaxElementSize) {
#ifdef NOISY_MAX_ELEMENT_SIZE
IndentBy(stdout, GetDepth());
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
printf("PASS1 ");
}
ListTag(stdout);
printf(": line.floaters=%s%s band.floaterCount=%d\n",
aLine->mFloaters.NotEmpty() ? "yes" : "no",
aState.mHaveRightFloaters ? "(have right floaters)" : "",
aState.mBand.GetFloaterCount());
#endif
if (0 != aState.mBand.GetFloaterCount()) {
// Add in floater impacts to the lines max-element-size
ComputeLineMaxElementSize(aState, aLine, &maxElementSize);
}
}
// If we're reflowing the line just to get incrementally update the
// maximum width, then don't post-place the line. It's doing work we
// don't need, and it will update things like aState.mKidXMost that
// we don't want updated...
if (!aUpdateMaximumWidth) {
PostPlaceLine(aState, aLine, maxElementSize);
}
// Add the already placed current-line floaters to the line
aLine->AppendFloaters(aState.mCurrentLineFloaters);
// Any below current line floaters to place?
if (aState.mBelowCurrentLineFloaters.NotEmpty()) {
// Reflow the below-current-line floaters, then add them to the
// lines floater list.
aState.PlaceBelowCurrentLineFloaters(aState.mBelowCurrentLineFloaters);
aLine->AppendFloaters(aState.mBelowCurrentLineFloaters);
}
// When a line has floaters, factor them into the combined-area
// computations.
if (aLine->HasFloaters()) {
// Combine the floater combined area (stored in aState) and the
// value computed by the line layout code.
nsRect lineCombinedArea;
aLine->GetCombinedArea(&lineCombinedArea);
#ifdef NOISY_COMBINED_AREA
ListTag(stdout);
printf(": lineCA=%d,%d,%d,%d floaterCA=%d,%d,%d,%d\n",
lineCombinedArea.x, lineCombinedArea.y,
lineCombinedArea.width, lineCombinedArea.height,
aState.mFloaterCombinedArea.x, aState.mFloaterCombinedArea.y,
aState.mFloaterCombinedArea.width,
aState.mFloaterCombinedArea.height);
#endif
CombineRects(aState.mFloaterCombinedArea, lineCombinedArea);
if (aState.mHaveRightFloaters &&
(aState.mUnconstrainedWidth || aState.mShrinkWrapWidth)) {
// We are reflowing in an unconstrained situation or shrink wrapping and
// have some right floaters. They were placed at the infinite right edge
// which will cause the combined area to be unusable.
//
// To solve this issue, we pretend that the right floaters ended up just
// past the end of the line. Note that the right floater combined area
// we computed as we were going will have as its X coordinate the left
// most edge of all the right floaters. Therefore, to accomplish our goal
// all we do is set that X value to the lines XMost value.
#ifdef NOISY_COMBINED_AREA
printf(" ==> rightFloaterCA=%d,%d,%d,%d lineXMost=%d\n",
aState.mRightFloaterCombinedArea.x,
aState.mRightFloaterCombinedArea.y,
aState.mRightFloaterCombinedArea.width,
aState.mRightFloaterCombinedArea.height,
aLine->mBounds.XMost());
#endif
aState.mRightFloaterCombinedArea.x = aLine->mBounds.XMost();
CombineRects(aState.mRightFloaterCombinedArea, lineCombinedArea);
if (aState.mShrinkWrapWidth) {
// Mark the line dirty so we come back and re-place the floater once
// the shrink wrap width is determined
aLine->MarkDirty();
aState.mNeedResizeReflow = PR_TRUE;
}
}
aLine->SetCombinedArea(lineCombinedArea);
#ifdef NOISY_COMBINED_AREA
printf(" ==> final lineCA=%d,%d,%d,%d\n",
lineCombinedArea.x, lineCombinedArea.y,
lineCombinedArea.width, lineCombinedArea.height);
#endif
aState.mHaveRightFloaters = PR_FALSE;
}
// Apply break-after clearing if necessary
PRUint8 breakType = aLine->GetBreakType();
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;
}
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.mBand.GetMaxElementSize(aState.mPresContext, &maxWidth, &maxHeight);
#ifdef NOISY_MAX_ELEMENT_SIZE
IndentBy(stdout, GetDepth());
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
printf("PASS1 ");
}
ListTag(stdout);
printf(": maxFloaterSize=%d,%d\n", maxWidth, maxHeight);
#endif
// If the floaters are wider than the content, then use the maximum
// floater width as the maximum width.
//
// It used to be the case that we would always place some content
// next to a floater, regardless of the amount of available space
// after subtracing off the floaters sizes. This can lead to content
// overlapping floaters, so we no longer do this (and pass CSS2's
// conformance tests). This is not how navigator 4-1 used to do
// things.
if (maxWidth > aMaxElementSize->width) {
aMaxElementSize->width = maxWidth;
}
// Only update the max-element-size's height value if the floater is
// part of the current line.
if (aLine->HasFloaters()) {
// 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)
{
// If it's inline elements, then make sure the views are correctly
// positioned and sized
if (aLine->IsInline()) {
nsIFrame* frame = aLine->mFirstChild;
for (PRInt32 i = 0; i < aLine->GetChildCount(); i++) {
::PlaceFrameView(aState.mPresContext, frame);
frame->GetNextSibling(&frame);
}
}
// Update max-element-size
if (aState.mComputeMaxElementSize) {
aState.UpdateMaxElementSize(aMaxElementSize);
// We also cache the max element width in the line. This is needed for
// incremental reflow
aLine->mMaxElementWidth = aMaxElementSize.width;
}
// If this is an unconstrained reflow, then cache the line width in the
// line. We'll need this during incremental reflow if we're asked to
// calculate the maximum width
if (aState.mUnconstrainedWidth) {
aLine->mMaximumWidth = aLine->mBounds.XMost();
}
// Update xmost
nscoord xmost = aLine->mBounds.XMost();
#ifdef DEBUG
if (CRAZY_WIDTH(xmost)) {
ListTag(stdout);
printf(": line=%p xmost=%d\n", aLine, xmost);
}
#endif
// If we're shrink wrapping our width and the line was wrapped,
// then make sure we take up all of the available width
if (aState.mShrinkWrapWidth && aLine->IsLineWrapped()) {
aState.mKidXMost = aState.BorderPadding().left + aState.mContentArea.width;
}
else if (xmost > aState.mKidXMost) {
aState.mKidXMost = xmost;
}
}
void
nsBlockFrame::PushLines(nsBlockReflowState& aState)
{
NS_ASSERTION(nsnull != aState.mPrevLine, "bad push");
nsLineBox* lastLine = aState.mPrevLine;
nsLineBox* nextLine = lastLine->mNext;
if (nextLine) {
lastLine->mNext = nsnull;
SetOverflowLines(aState.mPresContext, 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);
#ifdef DEBUG
VerifyOverflowSituation(aState.mPresContext);
#endif
}
PRBool
nsBlockFrame::DrainOverflowLines(nsIPresContext* aPresContext)
{
#ifdef DEBUG
VerifyOverflowSituation(aPresContext);
#endif
PRBool drained = PR_FALSE;
nsLineBox* overflowLines;
// First grab the prev-in-flows overflow lines
nsBlockFrame* prevBlock = (nsBlockFrame*) mPrevInFlow;
if (nsnull != prevBlock) {
overflowLines = prevBlock->GetOverflowLines(aPresContext, PR_TRUE);
if (nsnull != overflowLines) {
drained = PR_TRUE;
// Make all the frames on the overflow line list mine
nsIFrame* lastFrame = nsnull;
nsIFrame* frame = overflowLines->mFirstChild;
while (nsnull != frame) {
frame->SetParent(this);
// When pushing and pulling frames we need to check for whether any
// views need to be reparented
nsHTMLContainerFrame::ReparentFrameView(aPresContext, frame, prevBlock, this);
// Get the next frame
lastFrame = frame;
frame->GetNextSibling(&frame);
}
// Join the line lists
if (nsnull == mLines) {
mLines = overflowLines;
}
else {
// Join the sibling lists together
lastFrame->SetNextSibling(mLines->mFirstChild);
// Place overflow lines at the front of our line list
nsLineBox* lastLine = nsLineBox::LastLine(overflowLines);
lastLine->mNext = mLines;
mLines = overflowLines;
}
}
}
// Now grab our own overflow lines
overflowLines = GetOverflowLines(aPresContext, PR_TRUE);
if (overflowLines) {
// 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.
nsLineBox* lastLine = nsLineBox::LastLine(mLines);
if (nsnull == lastLine) {
mLines = overflowLines;
}
else {
lastLine->mNext = overflowLines;
nsIFrame* lastFrame = lastLine->LastChild();
lastFrame->SetNextSibling(overflowLines->mFirstChild);
}
drained = PR_TRUE;
}
return drained;
}
nsLineBox*
nsBlockFrame::GetOverflowLines(nsIPresContext* aPresContext,
PRBool aRemoveProperty)
{
nsCOMPtr