/**
* Attempt to place the block frame within the available space. If
* it fits, apply horizontal positioning (CSS 10.3.3), collapse
* margins (CSS2 8.3.1). Also apply relative positioning.
*/
bool
nsBlockReflowContext::PlaceBlock(const nsHTMLReflowState& aReflowState,
bool aForceFit,
nsLineBox* aLine,
nsCollapsingMargin& aBottomMarginResult,
nsRect& aInFlowBounds,
nsOverflowAreas& aOverflowAreas,
nsReflowStatus aReflowStatus)
{
// Compute collapsed bottom margin value.
if (NS_FRAME_IS_COMPLETE(aReflowStatus)) {
aBottomMarginResult = mMetrics.mCarriedOutBottomMargin;
aBottomMarginResult.Include(aReflowState.mComputedMargin.bottom);
} else {
// The used bottom-margin is set to zero above a break.
aBottomMarginResult.Zero();
}
nscoord x = mX;
nscoord y = mY;
nscoord backupContainingBlockAdvance = 0;
// Check whether the block's bottom margin collapses with its top
// margin. See CSS 2.1 section 8.3.1; those rules seem to match
// nsBlockFrame::IsEmpty(). Any such block must have zero height so
// check that first. Note that a block can have clearance and still
// have adjoining top/bottom margins, because the clearance goes
// above the top margin.
// Mark the frame as non-dirty; it has been reflowed (or we wouldn't
// be here), and we don't want to assert in CachedIsEmpty()
mFrame->RemoveStateBits(NS_FRAME_IS_DIRTY);
bool empty = 0 == mMetrics.height && aLine->CachedIsEmpty();
if (empty) {
// Collapse the bottom margin with the top margin that was already
// applied.
aBottomMarginResult.Include(mTopMargin);
#ifdef NOISY_VERTICAL_MARGINS
printf(" ");
nsFrame::ListTag(stdout, mOuterReflowState.frame);
printf(": ");
nsFrame::ListTag(stdout, mFrame);
printf(" -- collapsing top & bottom margin together; y=%d spaceY=%d\n",
y, mSpace.y);
#endif
// Section 8.3.1 of CSS 2.1 says that blocks with adjoining
// top/bottom margins whose top margin collapses with their
// parent's top margin should have their top border-edge at the
// top border-edge of their parent. We actually don't have to do
// anything special to make this happen. In that situation,
// nsBlockFrame::ShouldApplyTopMargin will have returned false,
// and mTopMargin and aClearance will have been zero in
// ReflowBlock.
// If we did apply our top margin, but now we're collapsing it
// into the bottom margin, we need to back up the containing
// block's y-advance by our top margin so that it doesn't get
// counted twice. Note that here we're allowing the line's bounds
// to become different from the block's position; we do this
// because the containing block will place the next line at the
// line's YMost, and it must place the next line at a different
// point from where this empty block will be.
backupContainingBlockAdvance = mTopMargin.get();
}
// See if the frame fit. If it's the first frame or empty then it
// always fits. If the height is unconstrained then it always fits,
// even if there's some sort of integer overflow that makes y +
// mMetrics.height appear to go beyond the available height.
if (!empty && !aForceFit && mSpace.height != NS_UNCONSTRAINEDSIZE) {
nscoord yMost = y - backupContainingBlockAdvance + mMetrics.height;
if (yMost > mSpace.YMost()) {
// didn't fit, we must acquit.
mFrame->DidReflow(mPresContext, &aReflowState, NS_FRAME_REFLOW_FINISHED);
return false;
}
}
aInFlowBounds = nsRect(x, y - backupContainingBlockAdvance,
mMetrics.width, mMetrics.height);
// Apply CSS relative positioning
const nsStyleDisplay* styleDisp = mFrame->GetStyleDisplay();
if (NS_STYLE_POSITION_RELATIVE == styleDisp->mPosition) {
x += aReflowState.mComputedOffsets.left;
y += aReflowState.mComputedOffsets.top;
}
// Now place the frame and complete the reflow process
nsContainerFrame::FinishReflowChild(mFrame, mPresContext, &aReflowState, mMetrics, x, y, 0);
aOverflowAreas = mMetrics.mOverflowAreas + nsPoint(x, y);
return true;
}
NS_IMETHODIMP
nsFirstLetterFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aReflowStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsFirstLetterFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aReflowStatus);
nsresult rv = NS_OK;
// Grab overflow list
DrainOverflowFrames(aPresContext);
nsIFrame* kid = mFrames.FirstChild();
// Setup reflow state for our child
nsSize availSize(aReflowState.availableWidth, aReflowState.availableHeight);
const nsMargin& bp = aReflowState.mComputedBorderPadding;
nscoord lr = bp.left + bp.right;
nscoord tb = bp.top + bp.bottom;
NS_ASSERTION(availSize.width != NS_UNCONSTRAINEDSIZE,
"should no longer use unconstrained widths");
availSize.width -= lr;
if (NS_UNCONSTRAINEDSIZE != availSize.height) {
availSize.height -= tb;
}
// Reflow the child
if (!aReflowState.mLineLayout) {
// When there is no lineLayout provided, we provide our own. The
// only time that the first-letter-frame is not reflowing in a
// line context is when its floating.
nsHTMLReflowState rs(aPresContext, aReflowState, kid, availSize);
nsLineLayout ll(aPresContext, nsnull, &aReflowState, nsnull);
ll.BeginLineReflow(bp.left, bp.top, availSize.width, NS_UNCONSTRAINEDSIZE,
PR_FALSE, PR_TRUE);
rs.mLineLayout = ≪
ll.SetFirstLetterStyleOK(PR_TRUE);
kid->WillReflow(aPresContext);
kid->Reflow(aPresContext, aMetrics, rs, aReflowStatus);
ll.EndLineReflow();
}
else {
// Pretend we are a span and reflow the child frame
nsLineLayout* ll = aReflowState.mLineLayout;
PRBool pushedFrame;
NS_ASSERTION(ll->GetFirstLetterStyleOK() || GetPrevInFlow(),
"First-in-flow first-letter should have first-letter style enabled in nsLineLayout!");
ll->BeginSpan(this, &aReflowState, bp.left, availSize.width);
ll->ReflowFrame(kid, aReflowStatus, &aMetrics, pushedFrame);
ll->EndSpan(this);
}
// Place and size the child and update the output metrics
kid->SetRect(nsRect(bp.left, bp.top, aMetrics.width, aMetrics.height));
kid->FinishAndStoreOverflow(&aMetrics);
kid->DidReflow(aPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
aMetrics.width += lr;
aMetrics.height += tb;
aMetrics.ascent += bp.top;
mBaseline = aMetrics.ascent;
// Ensure that the overflow rect contains the child textframe's overflow rect.
// Note that if this is floating, the overline/underline drawable area is in
// the overflow rect of the child textframe.
aMetrics.mOverflowArea.UnionRect(aMetrics.mOverflowArea,
nsRect(0, 0, aMetrics.width, aMetrics.height));
ConsiderChildOverflow(aMetrics.mOverflowArea, kid);
// Create a continuation or remove existing continuations based on
// the reflow completion status.
if (NS_FRAME_IS_COMPLETE(aReflowStatus)) {
if (aReflowState.mLineLayout) {
aReflowState.mLineLayout->SetFirstLetterStyleOK(PR_FALSE);
}
nsIFrame* kidNextInFlow = kid->GetNextInFlow();
if (kidNextInFlow) {
// Remove all of the childs next-in-flows
static_cast<nsContainerFrame*>(kidNextInFlow->GetParent())
->DeleteNextInFlowChild(aPresContext, kidNextInFlow);
}
}
else {
// Create a continuation for the child frame if it doesn't already
// have one.
nsIFrame* nextInFlow;
rv = CreateNextInFlow(aPresContext, this, kid, nextInFlow);
if (NS_FAILED(rv)) {
return rv;
}
// And then push it to our overflow list
if (nextInFlow) {
kid->SetNextSibling(nsnull);
SetOverflowFrames(aPresContext, nextInFlow);
}
else {
nsIFrame* nextSib = kid->GetNextSibling();
if (nextSib) {
kid->SetNextSibling(nsnull);
SetOverflowFrames(aPresContext, nextSib);
}
}
}
FinishAndStoreOverflow(&aMetrics);
NS_FRAME_SET_TRUNCATION(aReflowStatus, aReflowState, aMetrics);
return rv;
}
nsresult
nsInlineFrame::ReflowFrames(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
InlineReflowState& irs,
nsHTMLReflowMetrics& aMetrics,
nsReflowStatus& aStatus)
{
nsresult rv = NS_OK;
aStatus = NS_FRAME_COMPLETE;
nsLineLayout* lineLayout = aReflowState.mLineLayout;
PRBool ltr = (NS_STYLE_DIRECTION_LTR == aReflowState.mStyleVisibility->mDirection);
nscoord leftEdge = 0;
// Don't offset by our start borderpadding if we have a prev continuation or
// if we're in the last part of an {ib} split.
if (!GetPrevContinuation() &&
!nsLayoutUtils::FrameIsInLastPartOfIBSplit(this)) {
leftEdge = ltr ? aReflowState.mComputedBorderPadding.left
: aReflowState.mComputedBorderPadding.right;
}
nscoord availableWidth = aReflowState.availableWidth;
NS_ASSERTION(availableWidth != NS_UNCONSTRAINEDSIZE,
"should no longer use available widths");
// Subtract off left and right border+padding from availableWidth
availableWidth -= leftEdge;
availableWidth -= ltr ? aReflowState.mComputedBorderPadding.right
: aReflowState.mComputedBorderPadding.left;
lineLayout->BeginSpan(this, &aReflowState, leftEdge, leftEdge + availableWidth);
// First reflow our current children
nsIFrame* frame = mFrames.FirstChild();
PRBool done = PR_FALSE;
while (nsnull != frame) {
PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
// Check if we should lazily set the child frame's parent pointer
if (irs.mSetParentPointer) {
PRBool havePrevBlock =
irs.mLineContainer && irs.mLineContainer->GetPrevContinuation();
// If our block is the first in flow, then any floats under the pulled
// frame must already belong to our block.
if (havePrevBlock) {
// This has to happen before we update frame's parent; we need to
// know frame's ancestry under its old block.
// The blockChildren.ContainsFrame check performed by
// ReparentFloatsForInlineChild here may be slow, but we can't
// easily avoid it because we don't know where 'frame' originally
// came from. If we really really have to optimize this we could
// cache whether frame->GetParent() is under its containing blocks
// overflowList or not.
ReparentFloatsForInlineChild(irs.mLineContainer, frame, PR_FALSE);
}
frame->SetParent(this);
// We also need to check if frame has a next-in-flow. If it does, then set
// its parent frame pointer, too. Otherwise, if we reflow frame and it's
// complete we'll fail when deleting its next-in-flow which is no longer
// needed. This scenario doesn't happen often, but it can happen
nsIFrame* nextInFlow = frame->GetNextInFlow();
for ( ; nextInFlow; nextInFlow = nextInFlow->GetNextInFlow()) {
// Since we only do lazy setting of parent pointers for the frame's
// initial reflow, this frame can't have a next-in-flow. That means
// the continuing child frame must be in our child list as well. If
// not, then something is wrong
NS_ASSERTION(mFrames.ContainsFrame(nextInFlow), "unexpected flow");
if (havePrevBlock) {
ReparentFloatsForInlineChild(irs.mLineContainer, nextInFlow, PR_FALSE);
}
nextInFlow->SetParent(this);
}
// Fix the parent pointer for ::first-letter child frame next-in-flows,
// so nsFirstLetterFrame::Reflow can destroy them safely (bug 401042).
nsIFrame* realFrame = nsPlaceholderFrame::GetRealFrameFor(frame);
if (realFrame->GetType() == nsGkAtoms::letterFrame) {
nsIFrame* child = realFrame->GetFirstChild(nsnull);
if (child) {
NS_ASSERTION(child->GetType() == nsGkAtoms::textFrame,
"unexpected frame type");
nsIFrame* nextInFlow = child->GetNextInFlow();
for ( ; nextInFlow; nextInFlow = nextInFlow->GetNextInFlow()) {
NS_ASSERTION(nextInFlow->GetType() == nsGkAtoms::textFrame,
"unexpected frame type");
if (mFrames.ContainsFrame(nextInFlow)) {
nextInFlow->SetParent(this);
}
else {
#ifdef DEBUG
// Once we find a next-in-flow that isn't ours none of the
// remaining next-in-flows should be either.
for ( ; nextInFlow; nextInFlow = nextInFlow->GetNextInFlow()) {
NS_ASSERTION(!mFrames.ContainsFrame(nextInFlow),
"unexpected letter frame flow");
}
#endif
break;
}
}
}
}
}
rv = ReflowInlineFrame(aPresContext, aReflowState, irs, frame, aStatus);
if (NS_FAILED(rv)) {
done = PR_TRUE;
break;
}
if (NS_INLINE_IS_BREAK(aStatus) ||
(!reflowingFirstLetter && NS_FRAME_IS_NOT_COMPLETE(aStatus))) {
done = PR_TRUE;
break;
}
irs.mPrevFrame = frame;
frame = frame->GetNextSibling();
}
// Attempt to pull frames from our next-in-flow until we can't
if (!done && (nsnull != GetNextInFlow())) {
while (!done) {
PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
PRBool isComplete;
if (!frame) { // Could be non-null if we pulled a first-letter frame and
// it created a continuation, since we don't push those.
frame = PullOneFrame(aPresContext, irs, &isComplete);
}
#ifdef NOISY_PUSHING
printf("%p pulled up %p\n", this, frame);
#endif
if (nsnull == frame) {
if (!isComplete) {
aStatus = NS_FRAME_NOT_COMPLETE;
}
break;
}
rv = ReflowInlineFrame(aPresContext, aReflowState, irs, frame, aStatus);
if (NS_FAILED(rv)) {
done = PR_TRUE;
break;
}
if (NS_INLINE_IS_BREAK(aStatus) ||
(!reflowingFirstLetter && NS_FRAME_IS_NOT_COMPLETE(aStatus))) {
done = PR_TRUE;
break;
}
irs.mPrevFrame = frame;
frame = frame->GetNextSibling();
}
}
#ifdef DEBUG
if (NS_FRAME_IS_COMPLETE(aStatus)) {
// We can't be complete AND have overflow frames!
NS_ASSERTION(!GetOverflowFrames(), "whoops");
}
#endif
// If after reflowing our children they take up no area then make
// sure that we don't either.
//
// Note: CSS demands that empty inline elements still affect the
// line-height calculations. However, continuations of an inline
// that are empty we force to empty so that things like collapsed
// whitespace in an inline element don't affect the line-height.
aMetrics.width = lineLayout->EndSpan(this);
// Compute final width.
// Make sure to not include our start border and padding if we have a prev
// continuation or if we're in the last part of an {ib} split.
if (!GetPrevContinuation() &&
!nsLayoutUtils::FrameIsInLastPartOfIBSplit(this)) {
aMetrics.width += ltr ? aReflowState.mComputedBorderPadding.left
: aReflowState.mComputedBorderPadding.right;
}
/*
* We want to only apply the end border and padding if we're the last
* continuation and not in the first part of an {ib} split. To be the last
* continuation we have to be complete (so that we won't get a next-in-flow)
* and have no non-fluid continuations on our continuation chain.
*/
if (NS_FRAME_IS_COMPLETE(aStatus) &&
!GetLastInFlow()->GetNextContinuation() &&
!nsLayoutUtils::FrameIsInFirstPartOfIBSplit(this)) {
aMetrics.width += ltr ? aReflowState.mComputedBorderPadding.right
: aReflowState.mComputedBorderPadding.left;
}
nsLayoutUtils::SetFontFromStyle(aReflowState.rendContext, mStyleContext);
nsCOMPtr<nsIFontMetrics> fm;
aReflowState.rendContext->GetFontMetrics(*getter_AddRefs(fm));
if (fm) {
// Compute final height of the frame.
//
// Do things the standard css2 way -- though it's hard to find it
// in the css2 spec! It's actually found in the css1 spec section
// 4.4 (you will have to read between the lines to really see
// it).
//
// The height of our box is the sum of our font size plus the top
// and bottom border and padding. The height of children do not
// affect our height.
fm->GetMaxAscent(aMetrics.ascent);
fm->GetHeight(aMetrics.height);
} else {
NS_WARNING("Cannot get font metrics - defaulting sizes to 0");
aMetrics.ascent = aMetrics.height = 0;
}
aMetrics.ascent += aReflowState.mComputedBorderPadding.top;
aMetrics.height += aReflowState.mComputedBorderPadding.top +
aReflowState.mComputedBorderPadding.bottom;
// For now our overflow area is zero. The real value will be
// computed in |nsLineLayout::RelativePositionFrames|.
aMetrics.mOverflowArea.SetRect(0, 0, 0, 0);
#ifdef NOISY_FINAL_SIZE
ListTag(stdout);
printf(": metrics=%d,%d ascent=%d\n",
aMetrics.width, aMetrics.height, aMetrics.ascent);
#endif
return rv;
}
NS_IMETHODIMP
nsPageContentFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsPageContentFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
aStatus = NS_FRAME_COMPLETE; // initialize out parameter
nsresult rv = NS_OK;
if (GetPrevInFlow() && (GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
nsresult rv = aPresContext->PresShell()->FrameConstructor()
->ReplicateFixedFrames(this);
NS_ENSURE_SUCCESS(rv, rv);
}
// Set our size up front, since some parts of reflow depend on it
// being already set. Note that the computed height may be
// unconstrained; that's ok. Consumers should watch out for that.
SetSize(nsSize(aReflowState.availableWidth, aReflowState.availableHeight));
// A PageContentFrame must always have one child: the canvas frame.
// Resize our frame allowing it only to be as big as we are
// XXX Pay attention to the page's border and padding...
if (mFrames.NotEmpty()) {
nsIFrame* frame = mFrames.FirstChild();
nsSize maxSize(aReflowState.availableWidth, aReflowState.availableHeight);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame, maxSize);
kidReflowState.SetComputedHeight(aReflowState.availableHeight);
mPD->mPageContentSize = aReflowState.availableWidth;
// Reflow the page content area
rv = ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, 0, 0, 0, aStatus);
NS_ENSURE_SUCCESS(rv, rv);
// The document element's background should cover the entire canvas, so
// take into account the combined area and any space taken up by
// absolutely positioned elements
nsMargin padding(0,0,0,0);
// XXXbz this screws up percentage padding (sets padding to zero
// in the percentage padding case)
kidReflowState.mStylePadding->GetPadding(padding);
// This is for shrink-to-fit, and therefore we want to use the
// scrollable overflow, since the purpose of shrink to fit is to
// make the content that ought to be reachable (represented by the
// scrollable overflow) fit in the page.
if (frame->HasOverflowAreas()) {
// The background covers the content area and padding area, so check
// for children sticking outside the child frame's padding edge
nscoord xmost = aDesiredSize.ScrollableOverflow().XMost();
if (xmost > aDesiredSize.width) {
mPD->mPageContentXMost =
xmost +
kidReflowState.mStyleBorder->GetActualBorderWidth(NS_SIDE_RIGHT) +
padding.right;
}
}
// Place and size the child
FinishReflowChild(frame, aPresContext, &kidReflowState, aDesiredSize, 0, 0, 0);
NS_ASSERTION(aPresContext->IsDynamic() || !NS_FRAME_IS_FULLY_COMPLETE(aStatus) ||
!frame->GetNextInFlow(), "bad child flow list");
}
// Reflow our fixed frames
nsReflowStatus fixedStatus = NS_FRAME_COMPLETE;
mFixedContainer.Reflow(this, aPresContext, aReflowState, fixedStatus,
aReflowState.availableWidth,
aReflowState.availableHeight,
PR_FALSE, PR_TRUE, PR_TRUE, // XXX could be optimized
nsnull /* ignore overflow */);
NS_ASSERTION(NS_FRAME_IS_COMPLETE(fixedStatus), "fixed frames can be truncated, but not incomplete");
// Return our desired size
aDesiredSize.width = aReflowState.availableWidth;
if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE) {
aDesiredSize.height = aReflowState.availableHeight;
}
FinishAndStoreOverflow(&aDesiredSize);
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
NS_IMETHODIMP
CVE_2013_1732_firefox12_0_nsBlockFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsBlockFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
#ifdef DEBUG
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": begin reflow availSize=%d,%d computedSize=%d,%d\n",
aReflowState.availableWidth, aReflowState.availableHeight,
aReflowState.ComputedWidth(), aReflowState.ComputedHeight());
}
AutoNoisyIndenter indent(gNoisy);
PRTime start = LL_ZERO; // Initialize these variablies to silence the compiler.
PRInt32 ctc = 0; // We only use these if they are set (gLameReflowMetrics).
if (gLameReflowMetrics) {
start = PR_Now();
ctc = nsLineBox::GetCtorCount();
}
#endif
const nsHTMLReflowState *reflowState = &aReflowState;
nsAutoPtr<nsHTMLReflowState> mutableReflowState;
// If we have non-auto height, we're clipping our kids and we fit,
// make sure our kids fit too.
if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE &&
aReflowState.ComputedHeight() != NS_AUTOHEIGHT &&
ApplyOverflowClipping(this, aReflowState.mStyleDisplay)) {
nsMargin heightExtras = aReflowState.mComputedBorderPadding;
if (GetSkipSides() & NS_SIDE_TOP) {
heightExtras.top = 0;
} else {
// Bottom margin never causes us to create continuations, so we
// don't need to worry about whether it fits in its entirety.
heightExtras.top += aReflowState.mComputedMargin.top;
}
if (GetEffectiveComputedHeight(aReflowState) + heightExtras.TopBottom() <=
aReflowState.availableHeight) {
mutableReflowState = new nsHTMLReflowState(aReflowState);
mutableReflowState->availableHeight = NS_UNCONSTRAINEDSIZE;
reflowState = mutableReflowState;
}
}
// See comment below about oldSize. Use *only* for the
// abs-pos-containing-block-size-change optimization!
nsSize oldSize = GetSize();
// Should we create a float manager?
nsAutoFloatManager autoFloatManager(const_cast<nsHTMLReflowState&>(*reflowState));
// XXXldb If we start storing the float manager in the frame rather
// than keeping it around only during reflow then we should create it
// only when there are actually floats to manage. Otherwise things
// like tables will gain significant bloat.
bool needFloatManager = nsBlockFrame::BlockNeedsFloatManager(this);
if (needFloatManager)
autoFloatManager.CreateFloatManager(aPresContext);
// OK, some lines may be reflowed. Blow away any saved line cursor
// because we may invalidate the nondecreasing
// overflowArea.VisualOverflow().y/yMost invariant, and we may even
// delete the line with the line cursor.
ClearLineCursor();
if (IsFrameTreeTooDeep(*reflowState, aMetrics, aStatus)) {
return NS_OK;
}
bool marginRoot = BlockIsMarginRoot(this);
nsBlockReflowState state(*reflowState, aPresContext, this, aMetrics,
marginRoot, marginRoot, needFloatManager);
#ifdef IBMBIDI
if (GetStateBits() & NS_BLOCK_NEEDS_BIDI_RESOLUTION)
static_cast<nsBlockFrame*>(GetFirstContinuation())->ResolveBidi();
#endif // IBMBIDI
if (RenumberLists(aPresContext)) {
AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
}
nsresult rv = NS_OK;
// ALWAYS drain overflow. We never want to leave the previnflow's
// overflow lines hanging around; block reflow depends on the
// overflow line lists being cleared out between reflow passes.
DrainOverflowLines();
// Handle paginated overflow (see nsContainerFrame.h)
nsOverflowAreas ocBounds;
nsReflowStatus ocStatus = NS_FRAME_COMPLETE;
if (GetPrevInFlow()) {
ReflowOverflowContainerChildren(aPresContext, *reflowState, ocBounds, 0,
ocStatus);
}
// Now that we're done cleaning up our overflow container lists, we can
// give |state| its nsOverflowContinuationTracker.
nsOverflowContinuationTracker tracker(aPresContext, this, false);
state.mOverflowTracker = &tracker;
// Drain & handle pushed floats
DrainPushedFloats(state);
nsOverflowAreas fcBounds;
nsReflowStatus fcStatus = NS_FRAME_COMPLETE;
rv = ReflowPushedFloats(state, fcBounds, fcStatus);
NS_ENSURE_SUCCESS(rv, rv);
// If we're not dirty (which means we'll mark everything dirty later)
// and our width has changed, mark the lines dirty that we need to
// mark dirty for a resize reflow.
if (reflowState->mFlags.mHResize)
PrepareResizeReflow(state);
mState &= ~NS_FRAME_FIRST_REFLOW;
// Now reflow...
rv = ReflowDirtyLines(state);
NS_ASSERTION(NS_SUCCEEDED(rv), "reflow dirty lines failed");
if (NS_FAILED(rv)) return rv;
NS_MergeReflowStatusInto(&state.mReflowStatus, ocStatus);
NS_MergeReflowStatusInto(&state.mReflowStatus, fcStatus);
// If we end in a BR with clear and affected floats continue,
// we need to continue, too.
if (NS_UNCONSTRAINEDSIZE != reflowState->availableHeight &&
NS_FRAME_IS_COMPLETE(state.mReflowStatus) &&
state.mFloatManager->ClearContinues(FindTrailingClear())) {
NS_FRAME_SET_INCOMPLETE(state.mReflowStatus);
}
if (!NS_FRAME_IS_FULLY_COMPLETE(state.mReflowStatus)) {
if (GetOverflowLines() || GetPushedFloats()) {
state.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
}
#ifdef DEBUG_kipp
ListTag(stdout); printf(": block is not fully complete\n");
#endif
}
CheckFloats(state);
// Place the "marker" (bullet) frame if it is placed next to a block
// child.
//
// According to the CSS2 spec, section 12.6.1, the "marker" box
// participates in the height calculation of the list-item box's
// first line box.
//
// There are exactly two places a bullet can be placed: near the
// first or second line. It's only placed on the second line in a
// rare case: an empty first line followed by a second line that
// contains a block (example: <LI>\n<P>... ). This is where
// the second case can happen.
if (mBullet && HaveOutsideBullet() && !mLines.empty() &&
(mLines.front()->IsBlock() ||
(0 == mLines.front()->mBounds.height &&
mLines.front() != mLines.back() &&
mLines.begin().next()->IsBlock()))) {
// Reflow the bullet
nsHTMLReflowMetrics metrics;
// XXX Use the entire line when we fix bug 25888.
nsLayoutUtils::LinePosition position;
bool havePosition = nsLayoutUtils::GetFirstLinePosition(this, &position);
nscoord lineTop = havePosition ? position.mTop
: reflowState->mComputedBorderPadding.top;
ReflowBullet(state, metrics, lineTop);
NS_ASSERTION(!BulletIsEmpty() || metrics.height == 0,
"empty bullet took up space");
if (havePosition && !BulletIsEmpty()) {
// We have some lines to align the bullet with.
// Doing the alignment using the baseline will also cater for
// bullets that are placed next to a child block (bug 92896)
// Tall bullets won't look particularly nice here...
nsRect bbox = mBullet->GetRect();
bbox.y = position.mBaseline - metrics.ascent;
mBullet->SetRect(bbox);
}
// Otherwise just leave the bullet where it is, up against our top padding.
}
// Compute our final size
nscoord bottomEdgeOfChildren;
ComputeFinalSize(*reflowState, state, aMetrics, &bottomEdgeOfChildren);
nsRect areaBounds = nsRect(0, 0, aMetrics.width, aMetrics.height);
ComputeOverflowAreas(areaBounds, reflowState->mStyleDisplay,
bottomEdgeOfChildren, aMetrics.mOverflowAreas);
// Factor overflow container child bounds into the overflow area
aMetrics.mOverflowAreas.UnionWith(ocBounds);
// Factor pushed float child bounds into the overflow area
aMetrics.mOverflowAreas.UnionWith(fcBounds);
// Let the absolutely positioned container reflow any absolutely positioned
// child frames that need to be reflowed, e.g., elements with a percentage
// based width/height
// We want to do this under either of two conditions:
// 1. If we didn't do the incremental reflow above.
// 2. If our size changed.
// Even though it's the padding edge that's the containing block, we
// can use our rect (the border edge) since if the border style
// changed, the reflow would have been targeted at us so we'd satisfy
// condition 1.
// XXX checking oldSize is bogus, there are various reasons we might have
// reflowed but our size might not have been changed to what we
// asked for (e.g., we ended up being pushed to a new page)
// When WillReflowAgainForClearance is true, we will reflow again without
// resetting the size. Because of this, we must not reflow our abs-pos children
// in that situation --- what we think is our "new size"
// will not be our real new size. This also happens to be more efficient.
if (HasAbsolutelyPositionedChildren()) {
nsAbsoluteContainingBlock* absoluteContainer = GetAbsoluteContainingBlock();
bool haveInterrupt = aPresContext->HasPendingInterrupt();
if (reflowState->WillReflowAgainForClearance() ||
haveInterrupt) {
// Make sure that when we reflow again we'll actually reflow all the abs
// pos frames that might conceivably depend on our size (or all of them,
// if we're dirty right now and interrupted; in that case we also need
// to mark them all with NS_FRAME_IS_DIRTY). Sadly, we can't do much
// better than that, because we don't really know what our size will be,
// and it might in fact not change on the followup reflow!
if (haveInterrupt && (GetStateBits() & NS_FRAME_IS_DIRTY)) {
absoluteContainer->MarkAllFramesDirty();
} else {
absoluteContainer->MarkSizeDependentFramesDirty();
}
} else {
nsSize containingBlockSize =
CalculateContainingBlockSizeForAbsolutes(*reflowState,
nsSize(aMetrics.width,
aMetrics.height));
// Mark frames that depend on changes we just made to this frame as dirty:
// Now we can assume that the padding edge hasn't moved.
// We need to reflow the absolutes if one of them depends on
// its placeholder position, or the containing block size in a
// direction in which the containing block size might have
// changed.
bool cbWidthChanged = aMetrics.width != oldSize.width;
bool isRoot = !GetContent()->GetParent();
// If isRoot and we have auto height, then we are the initial
// containing block and the containing block height is the
// viewport height, which can't change during incremental
// reflow.
bool cbHeightChanged =
!(isRoot && NS_UNCONSTRAINEDSIZE == reflowState->ComputedHeight()) &&
aMetrics.height != oldSize.height;
absoluteContainer->Reflow(this, aPresContext, *reflowState,
state.mReflowStatus,
containingBlockSize.width,
containingBlockSize.height, true,
cbWidthChanged, cbHeightChanged,
&aMetrics.mOverflowAreas);
//XXXfr Why isn't this rv (and others in this file) checked/returned?
}
}
// Determine if we need to repaint our border, background or outline
CheckInvalidateSizeChange(aMetrics);
FinishAndStoreOverflow(&aMetrics);
// Clear the float manager pointer in the block reflow state so we
// don't waste time translating the coordinate system back on a dead
// float manager.
if (needFloatManager)
state.mFloatManager = nsnull;
aStatus = state.mReflowStatus;
#ifdef DEBUG
// Between when we drain pushed floats and when we complete reflow,
// we're allowed to have multiple continuations of the same float on
// our floats list, since a first-in-flow might get pushed to a later
// continuation of its containing block. But it's not permitted
// outside that time.
nsLayoutUtils::AssertNoDuplicateContinuations(this, mFloats);
if (gNoisyReflow) {
IndentBy(stdout, gNoiseIndent);
ListTag(stdout);
printf(": status=%x (%scomplete) metrics=%d,%d carriedMargin=%d",
aStatus, NS_FRAME_IS_COMPLETE(aStatus) ? "" : "not ",
aMetrics.width, aMetrics.height,
aMetrics.mCarriedOutBottomMargin.get());
if (HasOverflowAreas()) {
printf(" overflow-vis={%d,%d,%d,%d}",
aMetrics.VisualOverflow().x,
aMetrics.VisualOverflow().y,
aMetrics.VisualOverflow().width,
aMetrics.VisualOverflow().height);
printf(" overflow-scr={%d,%d,%d,%d}",
aMetrics.ScrollableOverflow().x,
aMetrics.ScrollableOverflow().y,
aMetrics.ScrollableOverflow().width,
aMetrics.ScrollableOverflow().height);
}
printf("\n");
}
if (gLameReflowMetrics) {
PRTime end = PR_Now();
PRInt32 ectc = nsLineBox::GetCtorCount();
PRInt32 numLines = mLines.size();
if (!numLines) numLines = 1;
PRTime delta, perLineDelta, lines;
LL_I2L(lines, numLines);
LL_SUB(delta, end, start);
LL_DIV(perLineDelta, delta, lines);
ListTag(stdout);
char buf[400];
PR_snprintf(buf, sizeof(buf),
": %lld elapsed (%lld per line) (%d lines; %d new lines)",
delta, perLineDelta, numLines, ectc - ctc);
printf("%s\n", buf);
}
#endif
NS_FRAME_SET_TRUNCATION(aStatus, (*reflowState), aMetrics);
return rv;
}