/** * 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; }