The Tor Browser: layout/svg/SVGFEContainerFrame.cpp@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     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 // Keep in (case-insensitive) order:

     7 #include "nsContainerFrame.h"

     8 #include "nsGkAtoms.h"

     9 #include "nsIFrame.h"

    10 #include "nsLiteralString.h"

    11 #include "nsSVGEffects.h"

    12 #include "nsSVGFilters.h"

    14 typedef nsContainerFrame SVGFEContainerFrameBase;

    16 /*

    17  * This frame is used by filter primitive elements that

    18  * have special child elements that provide parameters.

    19  */

    20 class SVGFEContainerFrame : public SVGFEContainerFrameBase

    21 {

    22   friend nsIFrame*

    23   NS_NewSVGFEContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);

    24 protected:

    25   SVGFEContainerFrame(nsStyleContext* aContext)

    26     : SVGFEContainerFrameBase(aContext)

    27   {

    28     AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);

    29   }

    31 public:

    32   NS_DECL_FRAMEARENA_HELPERS

    34   virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE

    35   {

    36     return SVGFEContainerFrameBase::IsFrameOfType(

    37             aFlags & ~(nsIFrame::eSVG | nsIFrame::eSVGContainer));

    38   }

    40 #ifdef DEBUG_FRAME_DUMP

    41   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE

    42   {

    43     return MakeFrameName(NS_LITERAL_STRING("SVGFEContainer"), aResult);

    44   }

    45 #endif

    47 #ifdef DEBUG

    48   virtual void Init(nsIContent* aContent,

    49                     nsIFrame*   aParent,

    50                     nsIFrame*   aPrevInFlow) MOZ_OVERRIDE;

    51 #endif

    52   /**

    53    * Get the "type" of the frame

    54    *

    55    * @see nsGkAtoms::svgFEContainerFrame

    56    */

    57   virtual nsIAtom* GetType() const MOZ_OVERRIDE;

    59   virtual nsresult AttributeChanged(int32_t  aNameSpaceID,

    60                                     nsIAtom* aAttribute,

    61                                     int32_t  aModType) MOZ_OVERRIDE;

    63   virtual bool UpdateOverflow() MOZ_OVERRIDE {

    64     // We don't maintain a visual overflow rect

    65     return false;

    66   }

    67 };

    69 nsIFrame*

    70 NS_NewSVGFEContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)

    71 {

    72   return new (aPresShell) SVGFEContainerFrame(aContext);

    73 }

    75 NS_IMPL_FRAMEARENA_HELPERS(SVGFEContainerFrame)

    77 #ifdef DEBUG

    78 void

    79 SVGFEContainerFrame::Init(nsIContent* aContent,

    80                           nsIFrame* aParent,

    81                           nsIFrame* aPrevInFlow)

    82 {

    83   NS_ASSERTION(aContent->IsNodeOfType(nsINode::eFILTER),

    84                "Trying to construct an SVGFEContainerFrame for a "

    85                "content element that doesn't support the right interfaces");

    87   SVGFEContainerFrameBase::Init(aContent, aParent, aPrevInFlow);

    88 }

    89 #endif /* DEBUG */

    91 nsIAtom *

    92 SVGFEContainerFrame::GetType() const

    93 {

    94   return nsGkAtoms::svgFEContainerFrame;

    95 }

    97 nsresult

    98 SVGFEContainerFrame::AttributeChanged(int32_t  aNameSpaceID,

    99                                       nsIAtom* aAttribute,

   100                                       int32_t  aModType)

   101 {

   102   nsSVGFE *element = static_cast<nsSVGFE*>(mContent);

   103   if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {

   104     nsSVGEffects::InvalidateRenderingObservers(this);

   105   }

   107   return SVGFEContainerFrameBase::AttributeChanged(aNameSpaceID,

   108                                                      aAttribute, aModType);

   109 }

The Tor Browser / file revision

layout/svg/SVGFEContainerFrame.cpp@97036ab72558

layout/svg/SVGFEContainerFrame.cpp