4cfdc5a174
Important changes:
* Change base class of nsRuby{Base,Text}Frame to nsInlineFrame
* Make ComputeSize of nsRubyFrame and nsRubyBaseContainerFrame behavior like inline frames
299 lines
9.6 KiB
C++
299 lines
9.6 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" */
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#include "nsRubyFrame.h"
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#include "nsLineLayout.h"
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#include "nsPresContext.h"
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#include "nsStyleContext.h"
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#include "WritingModes.h"
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#include "nsRubyBaseContainerFrame.h"
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#include "nsRubyTextContainerFrame.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(nsRubyFrame)
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NS_QUERYFRAME_ENTRY(nsRubyFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
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NS_IMPL_FRAMEARENA_HELPERS(nsRubyFrame)
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nsContainerFrame*
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NS_NewRubyFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext)
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{
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return new (aPresShell) nsRubyFrame(aContext);
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}
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//----------------------------------------------------------------------
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// nsRubyFrame Method Implementations
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// ==================================
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nsIAtom*
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nsRubyFrame::GetType() const
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{
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return nsGkAtoms::rubyFrame;
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}
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/* virtual */ bool
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nsRubyFrame::IsFrameOfType(uint32_t aFlags) const
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{
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return nsContainerFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eLineParticipant));
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}
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#ifdef DEBUG_FRAME_DUMP
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nsresult
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nsRubyFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("Ruby"), aResult);
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}
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#endif
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class MOZ_STACK_CLASS TextContainerIterator
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{
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public:
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TextContainerIterator(nsRubyBaseContainerFrame* aBaseContainer);
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void Next();
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bool AtEnd() const { return !mFrame; }
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nsRubyTextContainerFrame* GetTextContainer() const
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{
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return static_cast<nsRubyTextContainerFrame*>(mFrame);
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}
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private:
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nsIFrame* mFrame;
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};
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TextContainerIterator::TextContainerIterator(
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nsRubyBaseContainerFrame* aBaseContainer)
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{
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mFrame = aBaseContainer;
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Next();
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}
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void
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TextContainerIterator::Next()
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{
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if (mFrame) {
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mFrame = mFrame->GetNextSibling();
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if (mFrame && mFrame->GetType() != nsGkAtoms::rubyTextContainerFrame) {
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mFrame = nullptr;
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}
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}
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}
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/**
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* This class is responsible for appending and clearing
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* text container list of the base container.
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*/
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class MOZ_STACK_CLASS AutoSetTextContainers
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{
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public:
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AutoSetTextContainers(nsRubyBaseContainerFrame* aBaseContainer);
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~AutoSetTextContainers();
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private:
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nsRubyBaseContainerFrame* mBaseContainer;
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};
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AutoSetTextContainers::AutoSetTextContainers(
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nsRubyBaseContainerFrame* aBaseContainer)
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: mBaseContainer(aBaseContainer)
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{
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#ifdef DEBUG
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aBaseContainer->AssertTextContainersEmpty();
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#endif
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for (TextContainerIterator iter(aBaseContainer);
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!iter.AtEnd(); iter.Next()) {
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aBaseContainer->AppendTextContainer(iter.GetTextContainer());
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}
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}
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AutoSetTextContainers::~AutoSetTextContainers()
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{
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mBaseContainer->ClearTextContainers();
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}
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/**
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* This enumerator enumerates each segment.
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*/
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class MOZ_STACK_CLASS SegmentEnumerator
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{
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public:
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SegmentEnumerator(nsRubyFrame* aRubyFrame);
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void Next();
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bool AtEnd() const { return !mBaseContainer; }
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nsRubyBaseContainerFrame* GetBaseContainer() const
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{
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return mBaseContainer;
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}
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private:
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nsRubyBaseContainerFrame* mBaseContainer;
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};
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SegmentEnumerator::SegmentEnumerator(nsRubyFrame* aRubyFrame)
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{
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nsIFrame* frame = aRubyFrame->GetFirstPrincipalChild();
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MOZ_ASSERT(!frame ||
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frame->GetType() == nsGkAtoms::rubyBaseContainerFrame);
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mBaseContainer = static_cast<nsRubyBaseContainerFrame*>(frame);
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}
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void
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SegmentEnumerator::Next()
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{
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MOZ_ASSERT(mBaseContainer);
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nsIFrame* frame = mBaseContainer->GetNextSibling();
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while (frame && frame->GetType() != nsGkAtoms::rubyBaseContainerFrame) {
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frame = frame->GetNextSibling();
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}
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mBaseContainer = static_cast<nsRubyBaseContainerFrame*>(frame);
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}
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/* virtual */ void
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nsRubyFrame::AddInlineMinISize(nsRenderingContext *aRenderingContext,
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nsIFrame::InlineMinISizeData *aData)
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{
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nscoord max = 0;
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for (SegmentEnumerator e(this); !e.AtEnd(); e.Next()) {
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AutoSetTextContainers holder(e.GetBaseContainer());
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max = std::max(max, e.GetBaseContainer()->GetMinISize(aRenderingContext));
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}
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aData->currentLine += max;
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}
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/* virtual */ void
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nsRubyFrame::AddInlinePrefISize(nsRenderingContext *aRenderingContext,
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nsIFrame::InlinePrefISizeData *aData)
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{
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nscoord sum = 0;
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for (SegmentEnumerator e(this); !e.AtEnd(); e.Next()) {
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AutoSetTextContainers holder(e.GetBaseContainer());
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sum += e.GetBaseContainer()->GetPrefISize(aRenderingContext);
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}
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aData->currentLine += sum;
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}
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/* virtual */ LogicalSize
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nsRubyFrame::ComputeSize(nsRenderingContext *aRenderingContext,
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WritingMode aWM,
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const LogicalSize& aCBSize,
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nscoord aAvailableISize,
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const LogicalSize& aMargin,
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const LogicalSize& aBorder,
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const LogicalSize& aPadding,
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ComputeSizeFlags aFlags)
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{
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// Ruby frame is inline, hence don't compute size before reflow.
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return LogicalSize(aWM, NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
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}
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/* virtual */ nscoord
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nsRubyFrame::GetLogicalBaseline(WritingMode aWritingMode) const
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{
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return mBaseline;
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}
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/* virtual */ bool
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nsRubyFrame::CanContinueTextRun() const
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{
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return true;
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}
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/* virtual */ void
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nsRubyFrame::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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DO_GLOBAL_REFLOW_COUNT("nsRubyFrame");
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
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if (!aReflowState.mLineLayout) {
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NS_ASSERTION(aReflowState.mLineLayout,
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"No line layout provided to RubyFrame reflow method.");
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aStatus = NS_FRAME_COMPLETE;
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return;
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}
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// Begin the span for the ruby frame
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WritingMode frameWM = aReflowState.GetWritingMode();
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WritingMode lineWM = aReflowState.mLineLayout->GetWritingMode();
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LogicalMargin borderPadding = aReflowState.ComputedLogicalBorderPadding();
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nscoord availableISize = aReflowState.AvailableISize();
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NS_ASSERTION(availableISize != NS_UNCONSTRAINEDSIZE,
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"should no longer use available widths");
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// Subtract off inline axis border+padding from availableISize
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availableISize -= borderPadding.IStartEnd(frameWM);
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aReflowState.mLineLayout->BeginSpan(this, &aReflowState,
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borderPadding.IStart(frameWM),
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availableISize, &mBaseline);
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// FIXME: line breaking / continuations not yet implemented
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aStatus = NS_FRAME_COMPLETE;
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LogicalSize availSize(lineWM, aReflowState.AvailableISize(),
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aReflowState.AvailableBSize());
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for (SegmentEnumerator e(this); !e.AtEnd(); e.Next()) {
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nsRubyBaseContainerFrame* baseContainer = e.GetBaseContainer();
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AutoSetTextContainers holder(baseContainer);
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nsReflowStatus baseReflowStatus;
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nsHTMLReflowMetrics baseMetrics(aReflowState, aDesiredSize.mFlags);
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nsHTMLReflowState baseReflowState(aPresContext, aReflowState,
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baseContainer, availSize);
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baseReflowState.mLineLayout = aReflowState.mLineLayout;
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baseContainer->Reflow(aPresContext, baseMetrics, baseReflowState,
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baseReflowStatus);
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NS_ASSERTION(baseReflowStatus == NS_FRAME_COMPLETE,
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"Ruby line breaking is not yet implemented");
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baseContainer->SetSize(LogicalSize(lineWM, baseMetrics.ISize(lineWM),
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baseMetrics.BSize(lineWM)));
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FinishReflowChild(baseContainer, aPresContext, baseMetrics,
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&baseReflowState, 0, 0,
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NS_FRAME_NO_MOVE_FRAME | NS_FRAME_NO_MOVE_VIEW);
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for (TextContainerIterator iter(baseContainer);
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!iter.AtEnd(); iter.Next()) {
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nsRubyTextContainerFrame* textContainer = iter.GetTextContainer();
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nsReflowStatus textReflowStatus;
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nsHTMLReflowMetrics textMetrics(aReflowState, aDesiredSize.mFlags);
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nsHTMLReflowState textReflowState(aPresContext, aReflowState,
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textContainer, availSize);
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textReflowState.mLineLayout = aReflowState.mLineLayout;
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textContainer->Reflow(aPresContext, textMetrics,
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textReflowState, textReflowStatus);
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NS_ASSERTION(textReflowStatus == NS_FRAME_COMPLETE,
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"Ruby line breaking is not yet implemented");
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textContainer->SetSize(LogicalSize(lineWM, textMetrics.ISize(lineWM),
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textMetrics.BSize(lineWM)));
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// FIXME: This is a temporary calculation for finding the block coordinate
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// of the ruby text container. A better one replace it once it's been
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// spec'ed.
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// Find the starting block coordinate of the ruby base container for
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// this segment. For now, the ruby text container will be placed so that
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// its bottom edge touches this coordinate.
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nscoord baseContainerBCoord = baseContainer->GetLogicalPosition(
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GetParent()->GetLogicalSize().ISize(lineWM)).B(lineWM);
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FinishReflowChild(textContainer, aPresContext, textMetrics,
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&textReflowState, 0,
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baseContainerBCoord - textMetrics.BSize(lineWM), 0);
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}
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}
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aDesiredSize.ISize(lineWM) = aReflowState.mLineLayout->EndSpan(this);
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nsLayoutUtils::SetBSizeFromFontMetrics(this, aDesiredSize, aReflowState,
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borderPadding, lineWM, frameWM);
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}
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