nsIFrame* nsInlineFrame::PullOneFrame(nsPresContext* aPresContext, InlineReflowState& irs, PRBool* aIsComplete) { PRBool isComplete = PR_TRUE; nsIFrame* frame = nsnull; nsInlineFrame* nextInFlow = irs.mNextInFlow; while (nsnull != nextInFlow) { frame = nextInFlow->mFrames.FirstChild(); if (nsnull != frame) { // If our block has no next continuation, then any floats belonging to // the pulled frame must belong to our block already. This check ensures // we do no extra work in the common non-vertical-breaking case. if (irs.mLineContainer && irs.mLineContainer->GetNextContinuation()) { // The blockChildren.ContainsFrame check performed by // ReparentFloatsForInlineChild will be fast because frame's ancestor // will be the first child of its containing block. ReparentFloatsForInlineChild(irs.mLineContainer, frame, PR_FALSE); } nextInFlow->mFrames.RemoveFirstChild(); mFrames.InsertFrame(this, irs.mPrevFrame, frame); isComplete = PR_FALSE; nsHTMLContainerFrame::ReparentFrameView(aPresContext, frame, nextInFlow, this); break; } nextInFlow = (nsInlineFrame*) nextInFlow->GetNextInFlow(); irs.mNextInFlow = nextInFlow; } *aIsComplete = isComplete; return frame; }
nsIFrame* nsInlineFrame::PullOneFrame(nsPresContext* aPresContext, InlineReflowState& irs, PRBool* aIsComplete) { PRBool isComplete = PR_TRUE; nsIFrame* frame = nsnull; nsInlineFrame* nextInFlow = irs.mNextInFlow; while (nsnull != nextInFlow) { frame = nextInFlow->mFrames.FirstChild(); if (!frame) { // If the principal childlist has no frames, then try moving the overflow // frames to it. nsAutoPtr<nsFrameList> overflowFrames(nextInFlow->StealOverflowFrames()); if (overflowFrames) { nextInFlow->mFrames.SetFrames(*overflowFrames); frame = nextInFlow->mFrames.FirstChild(); } } if (nsnull != frame) { // If our block has no next continuation, then any floats belonging to // the pulled frame must belong to our block already. This check ensures // we do no extra work in the common non-vertical-breaking case. if (irs.mLineContainer && irs.mLineContainer->GetNextContinuation()) { // The blockChildren.ContainsFrame check performed by // ReparentFloatsForInlineChild will be fast because frame's ancestor // will be the first child of its containing block. ReparentFloatsForInlineChild(irs.mLineContainer, frame, PR_FALSE); } nextInFlow->mFrames.RemoveFirstChild(); // If we removed the last frame from the principal child list then move // any overflow frames to it. if (!nextInFlow->mFrames.FirstChild()) { nsAutoPtr<nsFrameList> overflowFrames(nextInFlow->StealOverflowFrames()); if (overflowFrames) { nextInFlow->mFrames.SetFrames(*overflowFrames); } } mFrames.InsertFrame(this, irs.mPrevFrame, frame); isComplete = PR_FALSE; if (irs.mLineLayout) { irs.mLineLayout->SetDirtyNextLine(); } nsHTMLContainerFrame::ReparentFrameView(aPresContext, frame, nextInFlow, this); break; } nextInFlow = (nsInlineFrame*) nextInFlow->GetNextInFlow(); irs.mNextInFlow = nextInFlow; } *aIsComplete = isComplete; return frame; }
void nsInlineFrame::ReparentFloatsForInlineChild(nsIFrame* aOurLineContainer, nsIFrame* aFrame, PRBool aReparentSiblings) { // XXXbz this would be better if it took a nsFrameList or a frame // list slice.... NS_ASSERTION(aOurLineContainer->GetNextContinuation() || aOurLineContainer->GetPrevContinuation(), "Don't call this when we have no continuation, it's a waste"); if (!aFrame) { NS_ASSERTION(aReparentSiblings, "Why did we get called?"); return; } nsIFrame* ancestor = aFrame; nsIFrame* ancestorBlockChild; do { ancestorBlockChild = ancestor; ancestor = ancestor->GetParent(); if (!ancestor) return; } while (!ancestor->IsFloatContainingBlock()); if (ancestor == aOurLineContainer) return; nsBlockFrame* ourBlock = nsLayoutUtils::GetAsBlock(aOurLineContainer); NS_ASSERTION(ourBlock, "Not a block, but broke vertically?"); nsBlockFrame* frameBlock = nsLayoutUtils::GetAsBlock(ancestor); NS_ASSERTION(frameBlock, "ancestor not a block"); nsFrameList blockChildren(ancestor->GetFirstChild(nsnull)); PRBool isOverflow = !blockChildren.ContainsFrame(ancestorBlockChild); while (PR_TRUE) { ourBlock->ReparentFloats(aFrame, frameBlock, isOverflow, PR_FALSE); if (!aReparentSiblings) return; nsIFrame* next = aFrame->GetNextSibling(); if (!next) return; if (next->GetParent() == aFrame->GetParent()) { aFrame = next; continue; } // This is paranoid and will hardly ever get hit ... but we can't actually // trust that the frames in the sibling chain all have the same parent, // because lazy reparenting may be going on. If we find a different // parent we need to redo our analysis. ReparentFloatsForInlineChild(aOurLineContainer, next, aReparentSiblings); return; } }
NS_IMETHODIMP nsFirstLineFrame::Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aMetrics, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { if (nsnull == aReflowState.mLineLayout) { return NS_ERROR_INVALID_ARG; } nsIFrame* lineContainer = aReflowState.mLineLayout->GetLineContainerFrame(); // Check for an overflow list with our prev-in-flow nsFirstLineFrame* prevInFlow = (nsFirstLineFrame*)GetPrevInFlow(); if (nsnull != prevInFlow) { nsAutoPtr<nsFrameList> prevOverflowFrames(prevInFlow->StealOverflowFrames()); if (prevOverflowFrames) { // Assign all floats to our block if necessary if (lineContainer && lineContainer->GetPrevContinuation()) { ReparentFloatsForInlineChild(lineContainer, prevOverflowFrames->FirstChild(), PR_TRUE); } const nsFrameList::Slice& newFrames = mFrames.InsertFrames(this, nsnull, *prevOverflowFrames); ReParentChildListStyle(aPresContext, newFrames, this); } } // It's also possible that we have an overflow list for ourselves nsAutoPtr<nsFrameList> overflowFrames(StealOverflowFrames()); if (overflowFrames) { NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames"); const nsFrameList::Slice& newFrames = mFrames.AppendFrames(nsnull, *overflowFrames); ReParentChildListStyle(aPresContext, newFrames, this); } // Set our own reflow state (additional state above and beyond // aReflowState) InlineReflowState irs; irs.mPrevFrame = nsnull; irs.mLineContainer = lineContainer; irs.mNextInFlow = (nsInlineFrame*) GetNextInFlow(); nsresult rv; PRBool wasEmpty = mFrames.IsEmpty(); if (wasEmpty) { // Try to pull over one frame before starting so that we know // whether we have an anonymous block or not. PRBool complete; PullOneFrame(aPresContext, irs, &complete); } if (nsnull == GetPrevInFlow()) { // XXX This is pretty sick, but what we do here is to pull-up, in // advance, all of the next-in-flows children. We re-resolve their // style while we are at at it so that when we reflow they have // the right style. // // All of this is so that text-runs reflow properly. irs.mPrevFrame = mFrames.LastChild(); for (;;) { PRBool complete; nsIFrame* frame = PullOneFrame(aPresContext, irs, &complete); if (!frame) { break; } irs.mPrevFrame = frame; } irs.mPrevFrame = nsnull; } else { // XXX do this in the Init method instead // For continuations, we need to check and see if our style // context is right. If its the same as the first-in-flow, then // we need to fix it up (that way :first-line style doesn't leak // into this continuation since we aren't the first line). nsFirstLineFrame* first = (nsFirstLineFrame*) GetFirstInFlow(); if (mStyleContext == first->mStyleContext) { // Fixup our style context and our children. First get the // proper parent context. nsStyleContext* parentContext = first->GetParent()->GetStyleContext(); if (parentContext) { // Create a new style context that is a child of the parent // style context thus removing the :first-line style. This way // we behave as if an anonymous (unstyled) span was the child // of the parent frame. nsRefPtr<nsStyleContext> newSC; newSC = aPresContext->StyleSet()-> ResolvePseudoStyleFor(nsnull, nsCSSAnonBoxes::mozLineFrame, parentContext); if (newSC) { // Switch to the new style context. SetStyleContext(newSC); // Re-resolve all children ReParentChildListStyle(aPresContext, mFrames, this); } } } } NS_ASSERTION(!aReflowState.mLineLayout->GetInFirstLine(), "Nested first-line frames? BOGUS"); aReflowState.mLineLayout->SetInFirstLine(PR_TRUE); rv = ReflowFrames(aPresContext, aReflowState, irs, aMetrics, aStatus); aReflowState.mLineLayout->SetInFirstLine(PR_FALSE); // Note: the line layout code will properly compute our overflow state for us return rv; }
nsresult nsInlineFrame::ReflowInlineFrame(nsPresContext* aPresContext, const nsHTMLReflowState& aReflowState, InlineReflowState& irs, nsIFrame* aFrame, nsReflowStatus& aStatus) { nsLineLayout* lineLayout = aReflowState.mLineLayout; PRBool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK(); PRBool pushedFrame; nsresult rv = lineLayout->ReflowFrame(aFrame, aStatus, nsnull, pushedFrame); if (NS_FAILED(rv)) { return rv; } if (NS_INLINE_IS_BREAK(aStatus)) { if (NS_INLINE_IS_BREAK_BEFORE(aStatus)) { if (aFrame != mFrames.FirstChild()) { // Change break-before status into break-after since we have // already placed at least one child frame. This preserves the // break-type so that it can be propagated upward. aStatus = NS_FRAME_NOT_COMPLETE | NS_INLINE_BREAK | NS_INLINE_BREAK_AFTER | (aStatus & NS_INLINE_BREAK_TYPE_MASK); PushFrames(aPresContext, aFrame, irs.mPrevFrame); } else { // Preserve reflow status when breaking-before our first child // and propagate it upward without modification. // Note: if we're lazily setting the frame pointer for our child // frames, then we need to set it now. Don't return and leave the // remaining child frames in our child list with the wrong parent // frame pointer... if (irs.mSetParentPointer) { if (irs.mLineContainer && irs.mLineContainer->GetPrevContinuation()) { ReparentFloatsForInlineChild(irs.mLineContainer, aFrame->GetNextSibling(), PR_TRUE); } for (nsIFrame* f = aFrame->GetNextSibling(); f; f = f->GetNextSibling()) { f->SetParent(this); } } } } else { // Break-after if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) { nsIFrame* newFrame; rv = CreateNextInFlow(aPresContext, this, aFrame, newFrame); if (NS_FAILED(rv)) { return rv; } } nsIFrame* nextFrame = aFrame->GetNextSibling(); if (nextFrame) { NS_FRAME_SET_INCOMPLETE(aStatus); PushFrames(aPresContext, nextFrame, aFrame); } else if (nsnull != GetNextInFlow()) { // We must return an incomplete status if there are more child // frames remaining in a next-in-flow that follows this frame. nsInlineFrame* nextInFlow = (nsInlineFrame*) GetNextInFlow(); while (nsnull != nextInFlow) { if (nextInFlow->mFrames.NotEmpty()) { NS_FRAME_SET_INCOMPLETE(aStatus); break; } nextInFlow = (nsInlineFrame*) nextInFlow->GetNextInFlow(); } } } } else if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) { if (nsGkAtoms::placeholderFrame == aFrame->GetType()) { nsBlockReflowState* blockRS = lineLayout->mBlockRS; blockRS->mBlock->SplitPlaceholder(*blockRS, aFrame); // Allow the parent to continue reflowing aStatus = NS_FRAME_COMPLETE; } else { nsIFrame* newFrame; rv = CreateNextInFlow(aPresContext, this, aFrame, newFrame); if (NS_FAILED(rv)) { return rv; } if (!reflowingFirstLetter) { nsIFrame* nextFrame = aFrame->GetNextSibling(); if (nextFrame) { PushFrames(aPresContext, nextFrame, aFrame); } } } } 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 nsInlineFrame::Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aMetrics, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { DO_GLOBAL_REFLOW_COUNT("nsInlineFrame"); DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus); if (nsnull == aReflowState.mLineLayout) { return NS_ERROR_INVALID_ARG; } PRBool lazilySetParentPointer = PR_FALSE; nsIFrame* lineContainer = aReflowState.mLineLayout->GetLineContainerFrame(); // Check for an overflow list with our prev-in-flow nsInlineFrame* prevInFlow = (nsInlineFrame*)GetPrevInFlow(); if (nsnull != prevInFlow) { nsAutoPtr<nsFrameList> prevOverflowFrames(prevInFlow->StealOverflowFrames()); if (prevOverflowFrames) { // When pushing and pulling frames we need to check for whether any // views need to be reparented. nsHTMLContainerFrame::ReparentFrameViewList(aPresContext, *prevOverflowFrames, prevInFlow, this); // Check if we should do the lazilySetParentPointer optimization. // Only do it in simple cases where we're being reflowed for the // first time, nothing (e.g. bidi resolution) has already given // us children, and there's no next-in-flow, so all our frames // will be taken from prevOverflowFrames. if ((GetStateBits() & NS_FRAME_FIRST_REFLOW) && mFrames.IsEmpty() && !GetNextInFlow()) { // If our child list is empty, just put the new frames into it. // Note that we don't set the parent pointer for the new frames. Instead wait // to do this until we actually reflow the frame. If the overflow list contains // thousands of frames this is a big performance issue (see bug #5588) mFrames.SetFrames(*prevOverflowFrames); lazilySetParentPointer = PR_TRUE; } else { // Assign all floats to our block if necessary if (lineContainer && lineContainer->GetPrevContinuation()) { ReparentFloatsForInlineChild(lineContainer, prevOverflowFrames->FirstChild(), PR_TRUE); } // Insert the new frames at the beginning of the child list // and set their parent pointer mFrames.InsertFrames(this, nsnull, *prevOverflowFrames); } } } // It's also possible that we have an overflow list for ourselves #ifdef DEBUG if (GetStateBits() & NS_FRAME_FIRST_REFLOW) { // If it's our initial reflow, then we should not have an overflow list. // However, add an assertion in case we get reflowed more than once with // the initial reflow reason nsFrameList* overflowFrames = GetOverflowFrames(); NS_ASSERTION(!overflowFrames || overflowFrames->IsEmpty(), "overflow list is not empty for initial reflow"); } #endif if (!(GetStateBits() & NS_FRAME_FIRST_REFLOW)) { nsAutoPtr<nsFrameList> overflowFrames(StealOverflowFrames()); if (overflowFrames) { NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames"); // Because we lazily set the parent pointer of child frames we get from // our prev-in-flow's overflow list, it's possible that we have not set // the parent pointer for these frames. mFrames.AppendFrames(this, *overflowFrames); } } if (IsFrameTreeTooDeep(aReflowState, aMetrics, aStatus)) { return NS_OK; } // Set our own reflow state (additional state above and beyond // aReflowState) InlineReflowState irs; irs.mPrevFrame = nsnull; irs.mLineContainer = lineContainer; irs.mNextInFlow = (nsInlineFrame*) GetNextInFlow(); irs.mSetParentPointer = lazilySetParentPointer; nsresult rv; if (mFrames.IsEmpty()) { // Try to pull over one frame before starting so that we know // whether we have an anonymous block or not. PRBool complete; (void) PullOneFrame(aPresContext, irs, &complete); } rv = ReflowFrames(aPresContext, aReflowState, irs, aMetrics, aStatus); // Note: the line layout code will properly compute our // overflow-rect state for us. NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics); return rv; }