LCOV - code coverage report
Current view: directory - layout/svg/base/src - nsSVGClipPathFrame.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) 2004
      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_SVGCLIPPATHFRAME_H__
      38                 : #define __NS_SVGCLIPPATHFRAME_H__
      39                 : 
      40                 : #include "nsSVGContainerFrame.h"
      41                 : #include "gfxMatrix.h"
      42                 : 
      43                 : class nsRenderingContext;
      44                 : 
      45                 : typedef nsSVGContainerFrame nsSVGClipPathFrameBase;
      46                 : 
      47                 : class nsSVGClipPathFrame : public nsSVGClipPathFrameBase
      48               0 : {
      49                 :   friend nsIFrame*
      50                 :   NS_NewSVGClipPathFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
      51                 : protected:
      52               0 :   nsSVGClipPathFrame(nsStyleContext* aContext)
      53                 :     : nsSVGClipPathFrameBase(aContext)
      54               0 :     , mInUse(false)
      55                 :   {
      56               0 :     AddStateBits(NS_STATE_SVG_NONDISPLAY_CHILD);
      57               0 :   }
      58                 : 
      59                 : public:
      60                 :   NS_DECL_FRAMEARENA_HELPERS
      61                 : 
      62                 :   // nsSVGClipPathFrame methods:
      63                 :   nsresult ClipPaint(nsRenderingContext* aContext,
      64                 :                      nsIFrame* aParent,
      65                 :                      const gfxMatrix &aMatrix);
      66                 : 
      67                 :   bool ClipHitTest(nsIFrame* aParent,
      68                 :                      const gfxMatrix &aMatrix,
      69                 :                      const nsPoint &aPoint);
      70                 : 
      71                 :   // Check if this clipPath is made up of more than one geometry object.
      72                 :   // If so, the clipping API in cairo isn't enough and we need to use
      73                 :   // mask based clipping.
      74                 :   bool IsTrivial();
      75                 : 
      76                 :   bool IsValid();
      77                 : 
      78                 :   // nsIFrame interface:
      79                 :   NS_IMETHOD AttributeChanged(PRInt32         aNameSpaceID,
      80                 :                               nsIAtom*        aAttribute,
      81                 :                               PRInt32         aModType);
      82                 : 
      83                 :   NS_IMETHOD Init(nsIContent*      aContent,
      84                 :                   nsIFrame*        aParent,
      85                 :                   nsIFrame*        aPrevInFlow);
      86                 : 
      87                 :   /**
      88                 :    * Get the "type" of the frame
      89                 :    *
      90                 :    * @see nsGkAtoms::svgClipPathFrame
      91                 :    */
      92                 :   virtual nsIAtom* GetType() const;
      93                 : 
      94                 : #ifdef DEBUG
      95               0 :   NS_IMETHOD GetFrameName(nsAString& aResult) const
      96                 :   {
      97               0 :     return MakeFrameName(NS_LITERAL_STRING("SVGClipPath"), aResult);
      98                 :   }
      99                 : #endif
     100                 : 
     101                 :  private:
     102                 :   // A helper class to allow us to paint clip paths safely. The helper
     103                 :   // automatically sets and clears the mInUse flag on the clip path frame
     104                 :   // (to prevent nasty reference loops). It's easy to mess this up
     105                 :   // and break things, so this helper makes the code far more robust.
     106                 :   class AutoClipPathReferencer
     107                 :   {
     108                 :   public:
     109               0 :     AutoClipPathReferencer(nsSVGClipPathFrame *aFrame)
     110               0 :        : mFrame(aFrame) {
     111               0 :       NS_ASSERTION(!mFrame->mInUse, "reference loop!");
     112               0 :       mFrame->mInUse = true;
     113               0 :     }
     114               0 :     ~AutoClipPathReferencer() {
     115               0 :       mFrame->mInUse = false;
     116               0 :     }
     117                 :   private:
     118                 :     nsSVGClipPathFrame *mFrame;
     119                 :   };
     120                 : 
     121                 :   nsIFrame *mClipParent;
     122                 :   nsAutoPtr<gfxMatrix> mClipParentMatrix;
     123                 :   // recursion prevention flag
     124                 :   bool mInUse;
     125                 : 
     126                 :   // nsSVGContainerFrame methods:
     127                 :   virtual gfxMatrix GetCanvasTM();
     128                 : };
     129                 : 
     130                 : #endif

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