layout/generic/nsRubyFrame.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 /* rendering object for CSS "display: ruby" */
   8
   9 #ifndef nsRubyFrame_h___
  10 #define nsRubyFrame_h___
  11
  12 #include "nsInlineFrame.h"
  13 #include "RubyUtils.h"
  14
  15 namespace mozilla {
  16 class PresShell;
  17 }  // namespace mozilla
  18
  19 /**
  20  * Factory function.
  21  * @return a newly allocated nsRubyFrame (infallible)
  22  */
  23 nsContainerFrame* NS_NewRubyFrame(mozilla::PresShell* aPresShell,
  24                                   mozilla::ComputedStyle* aStyle);
  25
  26 class nsRubyFrame final : public nsInlineFrame {
  27  public:
  28   NS_DECL_FRAMEARENA_HELPERS(nsRubyFrame)
  29   NS_DECL_QUERYFRAME
  30
  31   // nsIFrame overrides
  32   virtual void AddInlineMinISize(gfxContext* aRenderingContext,
  33                                  InlineMinISizeData* aData) override;
  34   virtual void AddInlinePrefISize(gfxContext* aRenderingContext,
  35                                   InlinePrefISizeData* aData) override;
  36   virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
  37                       const ReflowInput& aReflowInput,
  38                       nsReflowStatus& aStatus) override;
  39
  40 #ifdef DEBUG_FRAME_DUMP
  41   virtual nsresult GetFrameName(nsAString& aResult) const override;
  42 #endif
  43
  44   mozilla::RubyBlockLeadings GetBlockLeadings() const { return mLeadings; }
  45
  46  protected:
  47   friend nsContainerFrame* NS_NewRubyFrame(mozilla::PresShell* aPresShell,
  48                                            ComputedStyle* aStyle);
  49   explicit nsRubyFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
  50       : nsInlineFrame(aStyle, aPresContext, kClassID) {}
  51
  52   void ReflowSegment(nsPresContext* aPresContext,
  53                      const ReflowInput& aReflowInput, nscoord aBlockStartAscent,
  54                      nscoord aBlockSize,
  55                      nsRubyBaseContainerFrame* aBaseContainer,
  56                      nsReflowStatus& aStatus);
  57
  58   nsRubyBaseContainerFrame* PullOneSegment(const nsLineLayout* aLineLayout,
  59                                            ContinuationTraversingState& aState);
  60
  61   // The leadings required to put the annotations. They are dummy-
  62   // initialized to 0, and get meaningful values at first reflow.
  63   mozilla::RubyBlockLeadings mLeadings;
  64 };
  65
  66 #endif /* nsRubyFrame_h___ */