layout/svg/SVGViewFrame.cpp@97036ab72558 (annotated)
layout/svg/SVGViewFrame.cpp
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
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.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | // Keep in (case-insensitive) order: |
| michael@0 | 7 | #include "nsFrame.h" |
| michael@0 | 8 | #include "nsGkAtoms.h" |
| michael@0 | 9 | #include "nsSVGOuterSVGFrame.h" |
| michael@0 | 10 | #include "mozilla/dom/SVGSVGElement.h" |
| michael@0 | 11 | #include "mozilla/dom/SVGViewElement.h" |
| michael@0 | 12 | |
| michael@0 | 13 | typedef nsFrame SVGViewFrameBase; |
| michael@0 | 14 | |
| michael@0 | 15 | using namespace mozilla::dom; |
| michael@0 | 16 | |
| michael@0 | 17 | /** |
| michael@0 | 18 | * While views are not directly rendered in SVG they can be linked to |
| michael@0 | 19 | * and thereby override attributes of an <svg> element via a fragment |
| michael@0 | 20 | * identifier. The SVGViewFrame class passes on any attribute changes |
| michael@0 | 21 | * the view receives to the overridden <svg> element (if there is one). |
| michael@0 | 22 | **/ |
| michael@0 | 23 | class SVGViewFrame : public SVGViewFrameBase |
| michael@0 | 24 | { |
| michael@0 | 25 | friend nsIFrame* |
| michael@0 | 26 | NS_NewSVGViewFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); |
| michael@0 | 27 | protected: |
| michael@0 | 28 | SVGViewFrame(nsStyleContext* aContext) |
| michael@0 | 29 | : SVGViewFrameBase(aContext) |
| michael@0 | 30 | { |
| michael@0 | 31 | AddStateBits(NS_FRAME_IS_NONDISPLAY); |
| michael@0 | 32 | } |
| michael@0 | 33 | |
| michael@0 | 34 | public: |
| michael@0 | 35 | NS_DECL_FRAMEARENA_HELPERS |
| michael@0 | 36 | |
| michael@0 | 37 | #ifdef DEBUG |
| michael@0 | 38 | virtual void Init(nsIContent* aContent, |
| michael@0 | 39 | nsIFrame* aParent, |
| michael@0 | 40 | nsIFrame* aPrevInFlow) MOZ_OVERRIDE; |
| michael@0 | 41 | #endif |
| michael@0 | 42 | |
| michael@0 | 43 | virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE |
| michael@0 | 44 | { |
| michael@0 | 45 | return SVGViewFrameBase::IsFrameOfType(aFlags & ~(nsIFrame::eSVG)); |
| michael@0 | 46 | } |
| michael@0 | 47 | |
| michael@0 | 48 | #ifdef DEBUG_FRAME_DUMP |
| michael@0 | 49 | virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE |
| michael@0 | 50 | { |
| michael@0 | 51 | return MakeFrameName(NS_LITERAL_STRING("SVGView"), aResult); |
| michael@0 | 52 | } |
| michael@0 | 53 | #endif |
| michael@0 | 54 | |
| michael@0 | 55 | /** |
| michael@0 | 56 | * Get the "type" of the frame |
| michael@0 | 57 | * |
| michael@0 | 58 | * @see nsGkAtoms::svgFELeafFrame |
| michael@0 | 59 | */ |
| michael@0 | 60 | virtual nsIAtom* GetType() const MOZ_OVERRIDE; |
| michael@0 | 61 | |
| michael@0 | 62 | virtual nsresult AttributeChanged(int32_t aNameSpaceID, |
| michael@0 | 63 | nsIAtom* aAttribute, |
| michael@0 | 64 | int32_t aModType) MOZ_OVERRIDE; |
| michael@0 | 65 | |
| michael@0 | 66 | virtual bool UpdateOverflow() MOZ_OVERRIDE { |
| michael@0 | 67 | // We don't maintain a visual overflow rect |
| michael@0 | 68 | return false; |
| michael@0 | 69 | } |
| michael@0 | 70 | }; |
| michael@0 | 71 | |
| michael@0 | 72 | nsIFrame* |
| michael@0 | 73 | NS_NewSVGViewFrame(nsIPresShell* aPresShell, nsStyleContext* aContext) |
| michael@0 | 74 | { |
| michael@0 | 75 | return new (aPresShell) SVGViewFrame(aContext); |
| michael@0 | 76 | } |
| michael@0 | 77 | |
| michael@0 | 78 | NS_IMPL_FRAMEARENA_HELPERS(SVGViewFrame) |
| michael@0 | 79 | |
| michael@0 | 80 | #ifdef DEBUG |
| michael@0 | 81 | void |
| michael@0 | 82 | SVGViewFrame::Init(nsIContent* aContent, |
| michael@0 | 83 | nsIFrame* aParent, |
| michael@0 | 84 | nsIFrame* aPrevInFlow) |
| michael@0 | 85 | { |
| michael@0 | 86 | NS_ASSERTION(aContent->IsSVG(nsGkAtoms::view), |
| michael@0 | 87 | "Content is not an SVG view"); |
| michael@0 | 88 | |
| michael@0 | 89 | SVGViewFrameBase::Init(aContent, aParent, aPrevInFlow); |
| michael@0 | 90 | } |
| michael@0 | 91 | #endif /* DEBUG */ |
| michael@0 | 92 | |
| michael@0 | 93 | nsIAtom * |
| michael@0 | 94 | SVGViewFrame::GetType() const |
| michael@0 | 95 | { |
| michael@0 | 96 | return nsGkAtoms::svgViewFrame; |
| michael@0 | 97 | } |
| michael@0 | 98 | |
| michael@0 | 99 | nsresult |
| michael@0 | 100 | SVGViewFrame::AttributeChanged(int32_t aNameSpaceID, |
| michael@0 | 101 | nsIAtom* aAttribute, |
| michael@0 | 102 | int32_t aModType) |
| michael@0 | 103 | { |
| michael@0 | 104 | // Ignore zoomAndPan as it does not cause the <svg> element to re-render |
| michael@0 | 105 | |
| michael@0 | 106 | if (aNameSpaceID == kNameSpaceID_None && |
| michael@0 | 107 | (aAttribute == nsGkAtoms::preserveAspectRatio || |
| michael@0 | 108 | aAttribute == nsGkAtoms::viewBox || |
| michael@0 | 109 | aAttribute == nsGkAtoms::viewTarget)) { |
| michael@0 | 110 | |
| michael@0 | 111 | nsSVGOuterSVGFrame *outerSVGFrame = nsSVGUtils::GetOuterSVGFrame(this); |
| michael@0 | 112 | NS_ASSERTION(outerSVGFrame->GetContent()->IsSVG(nsGkAtoms::svg), |
| michael@0 | 113 | "Expecting an <svg> element"); |
| michael@0 | 114 | |
| michael@0 | 115 | SVGSVGElement* svgElement = |
| michael@0 | 116 | static_cast<SVGSVGElement*>(outerSVGFrame->GetContent()); |
| michael@0 | 117 | |
| michael@0 | 118 | nsAutoString viewID; |
| michael@0 | 119 | mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::id, viewID); |
| michael@0 | 120 | |
| michael@0 | 121 | if (svgElement->IsOverriddenBy(viewID)) { |
| michael@0 | 122 | // We're the view that's providing overrides, so pretend that the frame |
| michael@0 | 123 | // we're overriding was updated. |
| michael@0 | 124 | outerSVGFrame->AttributeChanged(aNameSpaceID, aAttribute, aModType); |
| michael@0 | 125 | } |
| michael@0 | 126 | } |
| michael@0 | 127 | |
| michael@0 | 128 | return SVGViewFrameBase::AttributeChanged(aNameSpaceID, |
| michael@0 | 129 | aAttribute, aModType); |
| michael@0 | 130 | } |
