The Tor Browser: layout/svg/nsSVGStopFrame.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 "nsStyleContext.h"

    10 #include "nsSVGEffects.h"

    12 // This is a very simple frame whose only purpose is to capture style change

    13 // events and propagate them to the parent.  Most of the heavy lifting is done

    14 // within the nsSVGGradientFrame, which is the parent for this frame

    16 typedef nsFrame  nsSVGStopFrameBase;

    18 class nsSVGStopFrame : public nsSVGStopFrameBase

    19 {

    20   friend nsIFrame*

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

    22 protected:

    23   nsSVGStopFrame(nsStyleContext* aContext)

    24     : nsSVGStopFrameBase(aContext)

    25   {

    26     AddStateBits(NS_FRAME_IS_NONDISPLAY);

    27   }

    29 public:

    30   NS_DECL_FRAMEARENA_HELPERS

    32   // nsIFrame interface:

    33 #ifdef DEBUG

    34   virtual void Init(nsIContent*      aContent,

    35                     nsIFrame*        aParent,

    36                     nsIFrame*        aPrevInFlow) MOZ_OVERRIDE;

    37 #endif

    39   void BuildDisplayList(nsDisplayListBuilder*   aBuilder,

    40                         const nsRect&           aDirtyRect,

    41                         const nsDisplayListSet& aLists) MOZ_OVERRIDE {}

    43   virtual nsresult AttributeChanged(int32_t         aNameSpaceID,

    44                                     nsIAtom*        aAttribute,

    45                                     int32_t         aModType) MOZ_OVERRIDE;

    47   /**

    48    * Get the "type" of the frame

    49    *

    50    * @see nsGkAtoms::svgStopFrame

    51    */

    52   virtual nsIAtom* GetType() const MOZ_OVERRIDE;

    54   virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE

    55   {

    56     return nsSVGStopFrameBase::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));

    57   }

    59 #ifdef DEBUG_FRAME_DUMP

    60   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE

    61   {

    62     return MakeFrameName(NS_LITERAL_STRING("SVGStop"), aResult);

    63   }

    64 #endif

    65 };

    67 //----------------------------------------------------------------------

    68 // Implementation

    70 NS_IMPL_FRAMEARENA_HELPERS(nsSVGStopFrame)

    72 //----------------------------------------------------------------------

    73 // nsIFrame methods:

    75 #ifdef DEBUG

    76 void

    77 nsSVGStopFrame::Init(nsIContent* aContent,

    78                      nsIFrame* aParent,

    79                      nsIFrame* aPrevInFlow)

    80 {

    81   NS_ASSERTION(aContent->IsSVG(nsGkAtoms::stop), "Content is not a stop element");

    83   nsSVGStopFrameBase::Init(aContent, aParent, aPrevInFlow);

    84 }

    85 #endif /* DEBUG */

    87 nsIAtom *

    88 nsSVGStopFrame::GetType() const

    89 {

    90   return nsGkAtoms::svgStopFrame;

    91 }

    93 nsresult

    94 nsSVGStopFrame::AttributeChanged(int32_t         aNameSpaceID,

    95                                  nsIAtom*        aAttribute,

    96                                  int32_t         aModType)

    97 {

    98   if (aNameSpaceID == kNameSpaceID_None &&

    99       aAttribute == nsGkAtoms::offset) {

   100     nsSVGEffects::InvalidateRenderingObservers(this);

   101   }

   103   return nsSVGStopFrameBase::AttributeChanged(aNameSpaceID,

   104                                               aAttribute, aModType);

   105 }

   107 // -------------------------------------------------------------------------

   108 // Public functions

   109 // -------------------------------------------------------------------------

   111 nsIFrame* NS_NewSVGStopFrame(nsIPresShell*   aPresShell,

   112                              nsStyleContext* aContext)

   113 {

   114   return new (aPresShell) nsSVGStopFrame(aContext);

   115 }

The Tor Browser / file revision

layout/svg/nsSVGStopFrame.cpp@97036ab72558

layout/svg/nsSVGStopFrame.cpp