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