LCOV - code coverage report
Current view: directory - layout/svg/base/src - nsSVGMaskFrame.h (source / functions) Found Hit Coverage
Test: app.info Lines: 15 0 0.0 %
Date: 2012-06-02 Functions: 6 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is the Mozilla SVG project.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is IBM Corporation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2005
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *
      23                 :  * Alternatively, the contents of this file may be used under the terms of
      24                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      25                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      26                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      27                 :  * of those above. If you wish to allow use of your version of this file only
      28                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      29                 :  * use your version of this file under the terms of the MPL, indicate your
      30                 :  * decision by deleting the provisions above and replace them with the notice
      31                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      32                 :  * the provisions above, a recipient may use your version of this file under
      33                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      34                 :  *
      35                 :  * ***** END LICENSE BLOCK ***** */
      36                 : 
      37                 : #ifndef __NS_SVGMASKFRAME_H__
      38                 : #define __NS_SVGMASKFRAME_H__
      39                 : 
      40                 : #include "nsSVGContainerFrame.h"
      41                 : #include "gfxPattern.h"
      42                 : #include "gfxMatrix.h"
      43                 : 
      44                 : class gfxContext;
      45                 : class nsRenderingContext;
      46                 : 
      47                 : typedef nsSVGContainerFrame nsSVGMaskFrameBase;
      48                 : 
      49                 : class nsSVGMaskFrame : public nsSVGMaskFrameBase
      50               0 : {
      51                 :   friend nsIFrame*
      52                 :   NS_NewSVGMaskFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
      53                 : protected:
      54               0 :   nsSVGMaskFrame(nsStyleContext* aContext)
      55                 :     : nsSVGMaskFrameBase(aContext)
      56               0 :     , mInUse(false)
      57                 :   {
      58               0 :     AddStateBits(NS_STATE_SVG_NONDISPLAY_CHILD);
      59               0 :   }
      60                 : 
      61                 : public:
      62                 :   NS_DECL_FRAMEARENA_HELPERS
      63                 : 
      64                 :   // nsSVGMaskFrame method:
      65                 :   already_AddRefed<gfxPattern> ComputeMaskAlpha(nsRenderingContext *aContext,
      66                 :                                                 nsIFrame* aParent,
      67                 :                                                 const gfxMatrix &aMatrix,
      68                 :                                                 float aOpacity = 1.0f);
      69                 : 
      70                 :   virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext);
      71                 : 
      72                 :   NS_IMETHOD AttributeChanged(PRInt32         aNameSpaceID,
      73                 :                               nsIAtom*        aAttribute,
      74                 :                               PRInt32         aModType);
      75                 : 
      76                 : #ifdef DEBUG
      77                 :   NS_IMETHOD Init(nsIContent*      aContent,
      78                 :                   nsIFrame*        aParent,
      79                 :                   nsIFrame*        aPrevInFlow);
      80                 : #endif
      81                 : 
      82                 :   /**
      83                 :    * Get the "type" of the frame
      84                 :    *
      85                 :    * @see nsGkAtoms::svgMaskFrame
      86                 :    */
      87                 :   virtual nsIAtom* GetType() const;
      88                 : 
      89                 : #ifdef DEBUG
      90               0 :   NS_IMETHOD GetFrameName(nsAString& aResult) const
      91                 :   {
      92               0 :     return MakeFrameName(NS_LITERAL_STRING("SVGMask"), aResult);
      93                 :   }
      94                 : #endif
      95                 : 
      96                 : private:
      97                 :   // A helper class to allow us to paint masks safely. The helper
      98                 :   // automatically sets and clears the mInUse flag on the mask frame
      99                 :   // (to prevent nasty reference loops). It's easy to mess this up
     100                 :   // and break things, so this helper makes the code far more robust.
     101                 :   class AutoMaskReferencer
     102                 :   {
     103                 :   public:
     104               0 :     AutoMaskReferencer(nsSVGMaskFrame *aFrame)
     105               0 :        : mFrame(aFrame) {
     106               0 :       NS_ASSERTION(!mFrame->mInUse, "reference loop!");
     107               0 :       mFrame->mInUse = true;
     108               0 :     }
     109               0 :     ~AutoMaskReferencer() {
     110               0 :       mFrame->mInUse = false;
     111               0 :     }
     112                 :   private:
     113                 :     nsSVGMaskFrame *mFrame;
     114                 :   };
     115                 : 
     116                 :   nsIFrame *mMaskParent;
     117                 :   nsAutoPtr<gfxMatrix> mMaskParentMatrix;
     118                 :   // recursion prevention flag
     119                 :   bool mInUse;
     120                 : 
     121                 :   // nsSVGContainerFrame methods:
     122                 :   virtual gfxMatrix GetCanvasTM();
     123                 : };
     124                 : 
     125                 : #endif

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