layout/mathml/nsMathMLmmultiscriptsFrame.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 nsMathMLmmultiscriptsFrame_h___
   8 #define nsMathMLmmultiscriptsFrame_h___
   9
  10 #include "mozilla/Attributes.h"
  11 #include "nsMathMLContainerFrame.h"
  12
  13 namespace mozilla {
  14 class PresShell;
  15 }  // namespace mozilla
  16
  17 //
  18 // <mmultiscripts> -- attach prescripts and tensor indices to a base
  19 // <msub> -- attach a subscript to a base
  20 // <msubsup> -- attach a subscript-superscript pair to a base
  21 // <msup> -- attach a superscript to a base
  22 //
  23
  24 class nsMathMLmmultiscriptsFrame final : public nsMathMLContainerFrame {
  25  public:
  26   NS_DECL_FRAMEARENA_HELPERS(nsMathMLmmultiscriptsFrame)
  27
  28   friend nsIFrame* NS_NewMathMLmmultiscriptsFrame(
  29       mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
  30
  31   NS_IMETHOD
  32   TransmitAutomaticData() override;
  33
  34   virtual nsresult Place(DrawTarget* aDrawTarget, bool aPlaceOrigin,
  35                          ReflowOutput& aDesiredSize) override;
  36
  37   static nsresult PlaceMultiScript(nsPresContext* aPresContext,
  38                                    DrawTarget* aDrawTarget, bool aPlaceOrigin,
  39                                    ReflowOutput& aDesiredSize,
  40                                    nsMathMLContainerFrame* aForFrame,
  41                                    nscoord aUserSubScriptShift,
  42                                    nscoord aUserSupScriptShift,
  43                                    float aFontSizeInflation);
  44
  45   uint8_t ScriptIncrement(nsIFrame* aFrame) override;
  46
  47  protected:
  48   explicit nsMathMLmmultiscriptsFrame(ComputedStyle* aStyle,
  49                                       nsPresContext* aPresContext)
  50       : nsMathMLContainerFrame(aStyle, aPresContext, kClassID) {}
  51   virtual ~nsMathMLmmultiscriptsFrame();
  52 };
  53
  54 #endif /* nsMathMLmmultiscriptsFrame_h___ */