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779f8cef59
To account for spacing between bases or text boxes during reflow, the line layout which manages the bases updates its inline direction coordinate based on the preferred inline size for the corresponding text boxes. Next, the base is reflowed at the correct inline coordinate. Each paired text box is then also reflowed at the proper inline position determined by (1) the current position of its corresponding base and (2) its own preferred width. In computing intrinsic widths, accounting for spacing is less complicated. The minimum intrinsic width is the width of the widest ruby column, and the preferred intrinsic width is the sum of all the ruby column widths. Each ruby column width is the maximum width of its base box and text boxes. These individual widths are determined using GetPrefISize on the base and text boxes. Ruby base container frames store a list of pointers to the ruby text container frames in the segment they denote. This list of pointers is created in the ruby frame reflow method before calling the reflow method for the ruby base container. The list exists and is used only during reflow of the main ruby frame and is cleared before returning from reflow.
69 lines
2.7 KiB
C++
69 lines
2.7 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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#ifndef nsRubyTextContainerFrame_h___
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#define nsRubyTextContainerFrame_h___
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#include "nsBlockFrame.h"
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#include "nsRubyBaseFrame.h"
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#include "nsRubyTextFrame.h"
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#include "nsLineLayout.h"
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/**
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* Factory function.
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* @return a newly allocated nsRubyTextContainerFrame (infallible)
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*/
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nsContainerFrame* NS_NewRubyTextContainerFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext);
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// If this is ever changed to be inline again, the code in
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// nsFrame::IsFontSizeInflationContainer should be updated to stop excluding
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// this from being considered inline.
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class nsRubyTextContainerFrame MOZ_FINAL : public nsBlockFrame
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{
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public:
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NS_DECL_FRAMEARENA_HELPERS
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NS_DECL_QUERYFRAME_TARGET(nsRubyTextContainerFrame)
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NS_DECL_QUERYFRAME
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// nsIFrame overrides
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virtual nsIAtom* GetType() const MOZ_OVERRIDE;
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virtual void Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus) MOZ_OVERRIDE;
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
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#endif
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void ReflowRubyTextFrame(nsRubyTextFrame* rtFrame, nsIFrame* rbFrame,
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nscoord baseStart, nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState);
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void BeginRTCLineLayout(nsPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState);
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nsLineLayout* GetLineLayout() { return mLineLayout.get(); };
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protected:
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friend nsContainerFrame*
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NS_NewRubyTextContainerFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext);
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nsRubyTextContainerFrame(nsStyleContext* aContext) : nsBlockFrame(aContext) {}
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// This pointer is active only during reflow of the ruby structure. It gets
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// created when the corresponding ruby base container is reflowed, and it is
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// destroyed when the ruby text container itself is reflowed.
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mozilla::UniquePtr<nsLineLayout> mLineLayout;
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// The intended dimensions of the ruby text container. These are modified
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// whenever a ruby text box is reflowed and used when the ruby text container
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// is reflowed.
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nscoord mISize;
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};
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#endif /* nsRubyTextContainerFrame_h___ */
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