The Tor Browser: layout/svg/SVGFELeafFrame.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 "nsFrame.h"

     8 #include "nsGkAtoms.h"

     9 #include "nsSVGEffects.h"

    10 #include "nsSVGFilters.h"

    12 typedef nsFrame SVGFELeafFrameBase;

    14 /*

    15  * This frame is used by filter primitive elements that don't

    16  * have special child elements that provide parameters.

    17  */

    18 class SVGFELeafFrame : public SVGFELeafFrameBase

    19 {

    20   friend nsIFrame*

    21   NS_NewSVGFELeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);

    22 protected:

    23   SVGFELeafFrame(nsStyleContext* aContext)

    24     : SVGFELeafFrameBase(aContext)

    25   {

    26     AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);

    27   }

    29 public:

    30   NS_DECL_FRAMEARENA_HELPERS

    32 #ifdef DEBUG

    33   virtual void Init(nsIContent* aContent,

    34                     nsIFrame*   aParent,

    35                     nsIFrame*   aPrevInFlow) MOZ_OVERRIDE;

    36 #endif

    38   virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE

    39   {

    40     return SVGFELeafFrameBase::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));

    41   }

    43 #ifdef DEBUG_FRAME_DUMP

    44   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE

    45   {

    46     return MakeFrameName(NS_LITERAL_STRING("SVGFELeaf"), aResult);

    47   }

    48 #endif

    50   /**

    51    * Get the "type" of the frame

    52    *

    53    * @see nsGkAtoms::svgFELeafFrame

    54    */

    55   virtual nsIAtom* GetType() const MOZ_OVERRIDE;

    57   virtual nsresult AttributeChanged(int32_t  aNameSpaceID,

    58                                     nsIAtom* aAttribute,

    59                                     int32_t  aModType) MOZ_OVERRIDE;

    61   virtual bool UpdateOverflow() MOZ_OVERRIDE {

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

    63     return false;

    64   }

    65 };

    67 nsIFrame*

    68 NS_NewSVGFELeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)

    69 {

    70   return new (aPresShell) SVGFELeafFrame(aContext);

    71 }

    73 NS_IMPL_FRAMEARENA_HELPERS(SVGFELeafFrame)

    75 #ifdef DEBUG

    76 void

    77 SVGFELeafFrame::Init(nsIContent* aContent,

    78                      nsIFrame* aParent,

    79                      nsIFrame* aPrevInFlow)

    80 {

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

    82                "Trying to construct an SVGFELeafFrame for a "

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

    85   SVGFELeafFrameBase::Init(aContent, aParent, aPrevInFlow);

    86 }

    87 #endif /* DEBUG */

    89 nsIAtom *

    90 SVGFELeafFrame::GetType() const

    91 {

    92   return nsGkAtoms::svgFELeafFrame;

    93 }

    95 nsresult

    96 SVGFELeafFrame::AttributeChanged(int32_t  aNameSpaceID,

    97                                  nsIAtom* aAttribute,

    98                                  int32_t  aModType)

    99 {

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

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

   102     nsSVGEffects::InvalidateRenderingObservers(this);

   103   }

   105   return SVGFELeafFrameBase::AttributeChanged(aNameSpaceID,

   106                                                 aAttribute, aModType);

   107 }

The Tor Browser / file revision

layout/svg/SVGFELeafFrame.cpp@97036ab72558

layout/svg/SVGFELeafFrame.cpp