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 bool IsFrameOfType(uint32_t aFlags) const override;
  33   virtual void AddInlineMinISize(gfxContext* aRenderingContext,
  34                                  InlineMinISizeData* aData) override;
  35   virtual void AddInlinePrefISize(gfxContext* aRenderingContext,
  36                                   InlinePrefISizeData* aData) override;
  37   virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
  38                       const ReflowInput& aReflowInput,
  39                       nsReflowStatus& aStatus) override;
  40
  41 #ifdef DEBUG_FRAME_DUMP
  42   virtual nsresult GetFrameName(nsAString& aResult) const override;
  43 #endif
  44
  45   mozilla::RubyBlockLeadings GetBlockLeadings() const { return mLeadings; }
  46
  47  protected:
  48   friend nsContainerFrame* NS_NewRubyFrame(mozilla::PresShell* aPresShell,
  49                                            ComputedStyle* aStyle);
  50   explicit nsRubyFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
  51       : nsInlineFrame(aStyle, aPresContext, kClassID) {}
  52
  53   void ReflowSegment(nsPresContext* aPresContext,
  54                      const ReflowInput& aReflowInput, nscoord aBlockStartAscent,
  55                      nscoord aBlockSize,
  56                      nsRubyBaseContainerFrame* aBaseContainer,
  57                      nsReflowStatus& aStatus);
  58
  59   nsRubyBaseContainerFrame* PullOneSegment(const nsLineLayout* aLineLayout,
  60                                            ContinuationTraversingState& aState);
  61
  62   // The leadings required to put the annotations. They are dummy-
  63   // initialized to 0, and get meaningful values at first reflow.
  64   mozilla::RubyBlockLeadings mLeadings;
  65 };
  66
  67 #endif /* nsRubyFrame_h___ */