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nsMathMLmactionFrame.h
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00001 /* ***** BEGIN LICENSE BLOCK *****
00002  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00003  *
00004  * The contents of this file are subject to the Mozilla Public License Version
00005  * 1.1 (the "License"); you may not use this file except in compliance with
00006  * the License. You may obtain a copy of the License at
00007  * http://www.mozilla.org/MPL/
00008  *
00009  * Software distributed under the License is distributed on an "AS IS" basis,
00010  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00011  * for the specific language governing rights and limitations under the
00012  * License.
00013  *
00014  * The Original Code is Mozilla MathML Project.
00015  *
00016  * The Initial Developer of the Original Code is
00017  * The University Of Queensland.
00018  * Portions created by the Initial Developer are Copyright (C) 1999
00019  * the Initial Developer. All Rights Reserved.
00020  *
00021  * Contributor(s):
00022  *   Roger B. Sidje <rbs@maths.uq.edu.au>
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either of the GNU General Public License Version 2 or later (the "GPL"),
00026  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
00029  * under the terms of either the GPL or the LGPL, and not to allow others to
00030  * use your version of this file under the terms of the MPL, indicate your
00031  * decision by deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL or the LGPL. If you do not delete
00033  * the provisions above, a recipient may use your version of this file under
00034  * the terms of any one of the MPL, the GPL or the LGPL.
00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #ifndef nsMathMLmactionFrame_h___
00039 #define nsMathMLmactionFrame_h___
00040 
00041 #include "nsCOMPtr.h"
00042 #include "nsMathMLContainerFrame.h"
00043 
00044 //
00045 // <maction> -- bind actions to a subexpression
00046 //
00047 
00048 //#define DEBUG_mouse 1
00049 
00050 #if DEBUG_mouse
00051 #define MOUSE(_msg) printf("maction:%p MOUSE: "#_msg" ...\n", this);
00052 #else
00053 #define MOUSE(_msg)
00054 #endif
00055 
00056 class nsMathMLmactionFrame : public nsMathMLContainerFrame,
00057                              public nsIDOMMouseListener {
00058 public:
00059   friend nsresult NS_NewMathMLmactionFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);
00060 
00061   NS_DECL_ISUPPORTS_INHERITED
00062 
00063   NS_IMETHOD
00064   Init(nsPresContext*  aPresContext,
00065        nsIContent*      aContent,
00066        nsIFrame*        aParent,
00067        nsStyleContext*  aContext,
00068        nsIFrame*        aPrevInFlow);
00069 
00070   NS_IMETHOD
00071   SetInitialChildList(nsPresContext* aPresContext,
00072                       nsIAtom*        aListName,
00073                       nsIFrame*       aChildList);
00074 
00075   NS_IMETHOD
00076   GetFrameForPoint(const nsPoint&    aPoint,
00077                    nsFramePaintLayer aWhichLayer,
00078                    nsIFrame**        aFrame);
00079 
00080   NS_IMETHOD
00081   Paint(nsPresContext*      aPresContext,
00082         nsIRenderingContext& aRenderingContext,
00083         const nsRect&        aDirtyRect,
00084         nsFramePaintLayer    aWhichLayer,
00085         PRUint32             aFlags = 0);
00086 
00087   NS_IMETHOD
00088   Place(nsIRenderingContext& aRenderingContext,
00089         PRBool               aPlaceOrigin,
00090         nsHTMLReflowMetrics& aDesiredSize);
00091 
00092   NS_IMETHOD
00093   Reflow(nsPresContext*          aPresContext,
00094          nsHTMLReflowMetrics&     aDesiredSize,
00095          const nsHTMLReflowState& aReflowState,
00096          nsReflowStatus&          aStatus);
00097 
00098   // nsIDOMMouseListener methods
00099   NS_IMETHOD MouseDown(nsIDOMEvent* aMouseEvent)  { MOUSE(down) return NS_OK; }
00100   NS_IMETHOD MouseUp(nsIDOMEvent* aMouseEvent) { MOUSE(up) return NS_OK; }
00101   NS_IMETHOD MouseClick(nsIDOMEvent* aMouseEvent);// { MOUSE(click) return NS_OK; }
00102   NS_IMETHOD MouseDblClick(nsIDOMEvent* aMouseEvent) { MOUSE(dblclik) return NS_OK; }
00103   NS_IMETHOD MouseOver(nsIDOMEvent* aMouseEvent);// { MOUSE(over) return NS_OK; }
00104   NS_IMETHOD MouseOut(nsIDOMEvent* aMouseEvent);// { MOUSE(out) return NS_OK; }
00105 
00106   // nsIDOMEventListener methods
00107   NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent)  { MOUSE(event); return NS_OK; }
00108 
00109 protected:
00110   nsMathMLmactionFrame();
00111   virtual ~nsMathMLmactionFrame();
00112   
00113   virtual PRIntn GetSkipSides() const { return 0; }
00114 
00115 private:
00116   nsPresContext* mPresContext;
00117   PRInt32         mActionType;
00118   PRInt32         mChildCount;
00119   PRInt32         mSelection;
00120   nsIFrame*       mSelectedFrame;
00121   nsString        mRestyle;
00122   PRBool          mWasRestyled;
00123 
00124   // helper to return the frame for the attribute selection="number"
00125   nsIFrame* 
00126   GetSelectedFrame();
00127 
00128   // helper to display a message on the status bar
00129   static nsresult
00130   ShowStatus(nsPresContext* aPresContext, 
00131              nsString&       aStatusMsg);
00132 };
00133 
00134 #endif /* nsMathMLmactionFrame_h___ */