mirror of
https://github.com/classilla/tenfourfox.git
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179 lines
5.9 KiB
C++
179 lines
5.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code is subject to the terms of the Mozilla Public License
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* version 2.0 (the "License"). You can obtain a copy of the License at
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* http://mozilla.org/MPL/2.0/. */
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/* rendering object for CSS "display: ruby-text-container" */
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#include "nsRubyTextContainerFrame.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/WritingModes.h"
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#include "nsPresContext.h"
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#include "nsStyleContext.h"
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using namespace mozilla;
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//----------------------------------------------------------------------
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// Frame class boilerplate
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// =======================
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NS_QUERYFRAME_HEAD(nsRubyTextContainerFrame)
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NS_QUERYFRAME_ENTRY(nsRubyTextContainerFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
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NS_IMPL_FRAMEARENA_HELPERS(nsRubyTextContainerFrame)
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nsContainerFrame*
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NS_NewRubyTextContainerFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext)
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{
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return new (aPresShell) nsRubyTextContainerFrame(aContext);
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}
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//----------------------------------------------------------------------
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// nsRubyTextContainerFrame Method Implementations
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// ===============================================
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nsIAtom*
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nsRubyTextContainerFrame::GetType() const
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{
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return nsGkAtoms::rubyTextContainerFrame;
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}
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#ifdef DEBUG_FRAME_DUMP
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nsresult
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nsRubyTextContainerFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("RubyTextContainer"), aResult);
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}
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#endif
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/* virtual */ bool
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nsRubyTextContainerFrame::IsFrameOfType(uint32_t aFlags) const
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{
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if (aFlags & eSupportsCSSTransforms) {
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return false;
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}
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return nsRubyTextContainerFrameSuper::IsFrameOfType(aFlags);
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}
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/* virtual */ void
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nsRubyTextContainerFrame::SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList)
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{
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nsRubyTextContainerFrameSuper::SetInitialChildList(aListID, aChildList);
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UpdateSpanFlag();
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}
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/* virtual */ void
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nsRubyTextContainerFrame::AppendFrames(ChildListID aListID,
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nsFrameList& aFrameList)
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{
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nsRubyTextContainerFrameSuper::AppendFrames(aListID, aFrameList);
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UpdateSpanFlag();
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}
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/* virtual */ void
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nsRubyTextContainerFrame::InsertFrames(ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList)
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{
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nsRubyTextContainerFrameSuper::InsertFrames(aListID, aPrevFrame, aFrameList);
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UpdateSpanFlag();
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}
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/* virtual */ void
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nsRubyTextContainerFrame::RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame)
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{
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nsRubyTextContainerFrameSuper::RemoveFrame(aListID, aOldFrame);
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UpdateSpanFlag();
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}
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void
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nsRubyTextContainerFrame::UpdateSpanFlag()
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{
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bool isSpan = false;
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// The continuation checks are safe here because spans never break.
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if (!GetPrevContinuation() && !GetNextContinuation()) {
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nsIFrame* onlyChild = mFrames.OnlyChild();
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if (onlyChild && onlyChild->IsPseudoFrame(GetContent())) {
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// Per CSS Ruby spec, if the only child of an rtc frame is
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// a pseudo rt frame, it spans all bases in the segment.
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isSpan = true;
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}
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}
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if (isSpan) {
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AddStateBits(NS_RUBY_TEXT_CONTAINER_IS_SPAN);
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} else {
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RemoveStateBits(NS_RUBY_TEXT_CONTAINER_IS_SPAN);
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}
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}
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/* virtual */ void
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nsRubyTextContainerFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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MarkInReflow();
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DO_GLOBAL_REFLOW_COUNT("nsRubyTextContainerFrame");
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
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// Although a ruby text container may have continuations, returning
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// NS_FRAME_COMPLETE here is still safe, since its parent, ruby frame,
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// ignores the status, and continuations of the ruby base container
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// will take care of our continuations.
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aStatus = NS_FRAME_COMPLETE;
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WritingMode lineWM = aReflowState.mLineLayout->GetWritingMode();
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nscoord minBCoord = nscoord_MAX;
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nscoord maxBCoord = nscoord_MIN;
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// The container size is not yet known, so we use a dummy (0, 0) size.
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// The block-dir position will be corrected below after containerSize
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// is finalized.
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const nsSize dummyContainerSize;
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for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) {
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nsIFrame* child = e.get();
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MOZ_ASSERT(child->GetType() == nsGkAtoms::rubyTextFrame);
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LogicalRect rect = child->GetLogicalRect(lineWM, dummyContainerSize);
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LogicalMargin margin = child->GetLogicalUsedMargin(lineWM);
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nscoord blockStart = rect.BStart(lineWM) - margin.BStart(lineWM);
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minBCoord = std::min(minBCoord, blockStart);
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nscoord blockEnd = rect.BEnd(lineWM) + margin.BEnd(lineWM);
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maxBCoord = std::max(maxBCoord, blockEnd);
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}
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LogicalSize size(lineWM, mISize, 0);
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if (!mFrames.IsEmpty()) {
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if (MOZ_UNLIKELY(minBCoord > maxBCoord)) {
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// XXX When bug 765861 gets fixed, this warning should be upgraded.
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NS_WARNING("bad block coord");
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minBCoord = maxBCoord = 0;
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}
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size.BSize(lineWM) = maxBCoord - minBCoord;
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nsSize containerSize = size.GetPhysicalSize(lineWM);
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for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) {
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nsIFrame* child = e.get();
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// We reflowed the child with a dummy container size, as the true size
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// was not yet known at that time.
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LogicalPoint pos = child->GetLogicalPosition(lineWM, dummyContainerSize);
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// Adjust block position to account for minBCoord,
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// then reposition child based on the true container width.
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pos.B(lineWM) -= minBCoord;
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// Relative positioning hasn't happened yet.
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// So MovePositionBy should not be used here.
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child->SetPosition(lineWM, pos, containerSize);
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nsContainerFrame::PlaceFrameView(child);
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}
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}
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aDesiredSize.SetSize(lineWM, size);
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}
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