/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsMathMLmactionFrame_h___
#define nsMathMLmactionFrame_h___

#include "nsCOMPtr.h"
#include "nsMathMLContainerFrame.h"
#include "nsIDOMEventListener.h"

//
// <maction> -- bind actions to a subexpression
//

class nsMathMLmactionFrame : public nsMathMLContainerFrame {
public:
  NS_DECL_FRAMEARENA_HELPERS

  friend nsIFrame* NS_NewMathMLmactionFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);

  NS_IMETHOD
  TransmitAutomaticData();

  NS_IMETHOD
  Init(nsIContent*      aContent,
       nsIFrame*        aParent,
       nsIFrame*        aPrevInFlow);

  NS_IMETHOD
  SetInitialChildList(ChildListID     aListID,
                      nsFrameList&    aChildList);

  virtual nsresult
  ChildListChanged(PRInt32 aModType);

  NS_IMETHOD BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                              const nsRect&           aDirtyRect,
                              const nsDisplayListSet& aLists);

  virtual nsresult
  Place(nsRenderingContext& aRenderingContext,
        bool                 aPlaceOrigin,
        nsHTMLReflowMetrics& aDesiredSize);

  NS_IMETHOD
  Reflow(nsPresContext*          aPresContext,
         nsHTMLReflowMetrics&     aDesiredSize,
         const nsHTMLReflowState& aReflowState,
         nsReflowStatus&          aStatus);

  NS_IMETHOD
  AttributeChanged(PRInt32  aNameSpaceID,
                   nsIAtom* aAttribute,
                   PRInt32  aModType);

private:
  void MouseClick();
  void MouseOver();
  void MouseOut();

  class MouseListener : public nsIDOMEventListener
  {
    NS_DECL_ISUPPORTS
    NS_DECL_NSIDOMEVENTLISTENER

    MouseListener(nsMathMLmactionFrame* aOwner) : mOwner(aOwner) { };

    nsMathMLmactionFrame* mOwner;
  };

protected:
  nsMathMLmactionFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
  virtual ~nsMathMLmactionFrame();
  
  virtual PRIntn GetSkipSides() const { return 0; }

private:
  PRInt32         mActionType;
  PRInt32         mChildCount;
  PRInt32         mSelection;
  nsIFrame*       mSelectedFrame;
  nsCOMPtr<MouseListener> mListener;

  // helper to return the frame for the attribute selection="number"
  nsIFrame* 
  GetSelectedFrame();
};

#endif /* nsMathMLmactionFrame_h___ */