The Tor Browser: layout/svg/nsSVGClipPathFrame.h@deefc01c0e14

Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef __NS_SVGCLIPPATHFRAME_H__

     7 #define __NS_SVGCLIPPATHFRAME_H__

     9 #include "mozilla/Attributes.h"

    10 #include "gfxMatrix.h"

    11 #include "nsSVGContainerFrame.h"

    12 #include "nsSVGUtils.h"

    14 class nsRenderingContext;

    15 class nsISVGChildFrame;

    17 typedef nsSVGContainerFrame nsSVGClipPathFrameBase;

    19 class nsSVGClipPathFrame : public nsSVGClipPathFrameBase

    20 {

    21   friend nsIFrame*

    22   NS_NewSVGClipPathFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);

    23 protected:

    24   nsSVGClipPathFrame(nsStyleContext* aContext)

    25     : nsSVGClipPathFrameBase(aContext)

    26     , mInUse(false)

    27   {

    28     AddStateBits(NS_FRAME_IS_NONDISPLAY);

    29   }

    31 public:

    32   NS_DECL_FRAMEARENA_HELPERS

    34   // nsIFrame methods:

    35   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,

    36                                 const nsRect&           aDirtyRect,

    37                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE {}

    39   // nsSVGClipPathFrame methods:

    40   nsresult ClipPaint(nsRenderingContext* aContext,

    41                      nsIFrame* aParent,

    42                      const gfxMatrix &aMatrix);

    44   bool ClipHitTest(nsIFrame* aParent,

    45                      const gfxMatrix &aMatrix,

    46                      const nsPoint &aPoint);

    48   // Check if this clipPath is made up of more than one geometry object.

    49   // If so, the clipping API in cairo isn't enough and we need to use

    50   // mask based clipping.

    51   bool IsTrivial(nsISVGChildFrame **aSingleChild = nullptr);

    53   bool IsValid();

    55   // nsIFrame interface:

    56   virtual nsresult AttributeChanged(int32_t         aNameSpaceID,

    57                                     nsIAtom*        aAttribute,

    58                                     int32_t         aModType) MOZ_OVERRIDE;

    60   virtual void Init(nsIContent*      aContent,

    61                     nsIFrame*        aParent,

    62                     nsIFrame*        aPrevInFlow) MOZ_OVERRIDE;

    64   /**

    65    * Get the "type" of the frame

    66    *

    67    * @see nsGkAtoms::svgClipPathFrame

    68    */

    69   virtual nsIAtom* GetType() const MOZ_OVERRIDE;

    71 #ifdef DEBUG_FRAME_DUMP

    72   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE

    73   {

    74     return MakeFrameName(NS_LITERAL_STRING("SVGClipPath"), aResult);

    75   }

    76 #endif

    78  private:

    79   // A helper class to allow us to paint clip paths safely. The helper

    80   // automatically sets and clears the mInUse flag on the clip path frame

    81   // (to prevent nasty reference loops). It's easy to mess this up

    82   // and break things, so this helper makes the code far more robust.

    83   class MOZ_STACK_CLASS AutoClipPathReferencer

    84   {

    85   public:

    86     AutoClipPathReferencer(nsSVGClipPathFrame *aFrame

    87                            MOZ_GUARD_OBJECT_NOTIFIER_PARAM)

    88        : mFrame(aFrame) {

    89       MOZ_GUARD_OBJECT_NOTIFIER_INIT;

    90       NS_ASSERTION(!mFrame->mInUse, "reference loop!");

    91       mFrame->mInUse = true;

    92     }

    93     ~AutoClipPathReferencer() {

    94       mFrame->mInUse = false;

    95     }

    96   private:

    97     nsSVGClipPathFrame *mFrame;

    98     MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER

    99   };

   101   nsIFrame *mClipParent;

   102   nsAutoPtr<gfxMatrix> mClipParentMatrix;

   103   // recursion prevention flag

   104   bool mInUse;

   106   // nsSVGContainerFrame methods:

   107   virtual gfxMatrix GetCanvasTM(uint32_t aFor,

   108                                 nsIFrame* aTransformRoot = nullptr) MOZ_OVERRIDE;

   109 };

   111 #endif

The Tor Browser / file revision

layout/svg/nsSVGClipPathFrame.h@deefc01c0e14

layout/svg/nsSVGClipPathFrame.h