layout/mathml/nsMathMLmactionFrame.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 nsMathMLmactionFrame_h___
   8 #define nsMathMLmactionFrame_h___
   9
  10 #include "nsCOMPtr.h"
  11 #include "nsMathMLSelectedFrame.h"
  12 #include "nsIDOMEventListener.h"
  13 #include "mozilla/Attributes.h"
  14
  15 namespace mozilla {
  16 class PresShell;
  17 }  // namespace mozilla
  18
  19 //
  20 // <maction> -- bind actions to a subexpression
  21 //
  22
  23 class nsMathMLmactionFrame final : public nsMathMLSelectedFrame {
  24  public:
  25   NS_DECL_FRAMEARENA_HELPERS(nsMathMLmactionFrame)
  26
  27   friend nsIFrame* NS_NewMathMLmactionFrame(mozilla::PresShell* aPresShell,
  28                                             ComputedStyle* aStyle);
  29
  30   virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
  31                     nsIFrame* aPrevInFlow) override;
  32
  33   void SetInitialChildList(ChildListID aListID,
  34                            nsFrameList&& aChildList) override;
  35
  36   virtual nsresult ChildListChanged(int32_t aModType) override;
  37
  38   virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
  39                                     int32_t aModType) override;
  40
  41  private:
  42   void MouseClick();
  43   void MouseOver();
  44   void MouseOut();
  45
  46   class MouseListener final : public nsIDOMEventListener {
  47    private:
  48     ~MouseListener() = default;
  49
  50    public:
  51     NS_DECL_ISUPPORTS
  52     NS_DECL_NSIDOMEVENTLISTENER
  53
  54     explicit MouseListener(nsMathMLmactionFrame* aOwner) : mOwner(aOwner) {}
  55
  56     nsMathMLmactionFrame* mOwner;
  57   };
  58
  59  protected:
  60   explicit nsMathMLmactionFrame(ComputedStyle* aStyle,
  61                                 nsPresContext* aPresContext)
  62       : nsMathMLSelectedFrame(aStyle, aPresContext, kClassID) {}
  63   virtual ~nsMathMLmactionFrame();
  64
  65  private:
  66   int32_t mActionType;
  67   int32_t mChildCount;
  68   int32_t mSelection;
  69   RefPtr<MouseListener> mListener;
  70
  71   // helper to return the frame for the attribute selection="number"
  72   nsIFrame* GetSelectedFrame() override;
  73 };
  74
  75 #endif /* nsMathMLmactionFrame_h___ */