layout/mathml/nsMathMLmspaceFrame.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 #ifndef nsMathMLmspaceFrame_h___
   8 #define nsMathMLmspaceFrame_h___
   9
  10 #include "mozilla/Attributes.h"
  11 #include "nsMathMLContainerFrame.h"
  12
  13 namespace mozilla {
  14 class PresShell;
  15 }  // namespace mozilla
  16
  17 //
  18 // <mspace> -- space
  19 //
  20
  21 class nsMathMLmspaceFrame final : public nsMathMLContainerFrame {
  22  public:
  23   NS_DECL_FRAMEARENA_HELPERS(nsMathMLmspaceFrame)
  24
  25   friend nsIFrame* NS_NewMathMLmspaceFrame(mozilla::PresShell* aPresShell,
  26                                            ComputedStyle* aStyle);
  27
  28   NS_IMETHOD
  29   TransmitAutomaticData() override {
  30     // The REC defines the following elements to be space-like:
  31     // * an mtext, mspace, maligngroup, or malignmark element;
  32     mPresentationData.flags |= NS_MATHML_SPACE_LIKE;
  33     return NS_OK;
  34   }
  35
  36   virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
  37                       const ReflowInput& aReflowInput,
  38                       nsReflowStatus& aStatus) override;
  39
  40  protected:
  41   explicit nsMathMLmspaceFrame(ComputedStyle* aStyle,
  42                                nsPresContext* aPresContext)
  43       : nsMathMLContainerFrame(aStyle, aPresContext, kClassID),
  44         mWidth(0),
  45         mHeight(0),
  46         mDepth(0) {}
  47   virtual ~nsMathMLmspaceFrame();
  48
  49   virtual nsresult MeasureForWidth(DrawTarget* aDrawTarget,
  50                                    ReflowOutput& aDesiredSize) override;
  51
  52  private:
  53   nscoord mWidth;
  54   nscoord mHeight;
  55   nscoord mDepth;
  56
  57   // helper method to initialize our member data
  58   void ProcessAttributes(nsPresContext* aPresContext);
  59 };
  60
  61 #endif /* nsMathMLmspaceFrame_h___ */