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comparison: layout/svg/nsSVGAFrame.cpp
layout/svg/nsSVGAFrame.cpp
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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 "gfxMatrix.h" | |
| 8 #include "mozilla/dom/SVGAElement.h" | |
| 9 #include "nsSVGContainerFrame.h" | |
| 10 #include "nsSVGIntegrationUtils.h" | |
| 11 #include "nsSVGUtils.h" | |
| 12 #include "SVGLengthList.h" | |
| 13 | |
| 14 using namespace mozilla; | |
| 15 | |
| 16 typedef nsSVGDisplayContainerFrame nsSVGAFrameBase; | |
| 17 | |
| 18 class nsSVGAFrame : public nsSVGAFrameBase | |
| 19 { | |
| 20 friend nsIFrame* | |
| 21 NS_NewSVGAFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); | |
| 22 protected: | |
| 23 nsSVGAFrame(nsStyleContext* aContext) : | |
| 24 nsSVGAFrameBase(aContext) {} | |
| 25 | |
| 26 public: | |
| 27 NS_DECL_FRAMEARENA_HELPERS | |
| 28 | |
| 29 #ifdef DEBUG | |
| 30 virtual void Init(nsIContent* aContent, | |
| 31 nsIFrame* aParent, | |
| 32 nsIFrame* aPrevInFlow) MOZ_OVERRIDE; | |
| 33 #endif | |
| 34 | |
| 35 // nsIFrame: | |
| 36 virtual nsresult AttributeChanged(int32_t aNameSpaceID, | |
| 37 nsIAtom* aAttribute, | |
| 38 int32_t aModType) MOZ_OVERRIDE; | |
| 39 | |
| 40 /** | |
| 41 * Get the "type" of the frame | |
| 42 * | |
| 43 * @see nsGkAtoms::svgAFrame | |
| 44 */ | |
| 45 virtual nsIAtom* GetType() const MOZ_OVERRIDE; | |
| 46 | |
| 47 #ifdef DEBUG_FRAME_DUMP | |
| 48 virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE | |
| 49 { | |
| 50 return MakeFrameName(NS_LITERAL_STRING("SVGA"), aResult); | |
| 51 } | |
| 52 #endif | |
| 53 // nsISVGChildFrame interface: | |
| 54 virtual void NotifySVGChanged(uint32_t aFlags) MOZ_OVERRIDE; | |
| 55 | |
| 56 // nsSVGContainerFrame methods: | |
| 57 virtual gfxMatrix GetCanvasTM(uint32_t aFor, | |
| 58 nsIFrame* aTransformRoot = nullptr) MOZ_OVERRIDE; | |
| 59 | |
| 60 private: | |
| 61 nsAutoPtr<gfxMatrix> mCanvasTM; | |
| 62 }; | |
| 63 | |
| 64 //---------------------------------------------------------------------- | |
| 65 // Implementation | |
| 66 | |
| 67 nsIFrame* | |
| 68 NS_NewSVGAFrame(nsIPresShell* aPresShell, nsStyleContext* aContext) | |
| 69 { | |
| 70 return new (aPresShell) nsSVGAFrame(aContext); | |
| 71 } | |
| 72 | |
| 73 NS_IMPL_FRAMEARENA_HELPERS(nsSVGAFrame) | |
| 74 | |
| 75 //---------------------------------------------------------------------- | |
| 76 // nsIFrame methods | |
| 77 #ifdef DEBUG | |
| 78 void | |
| 79 nsSVGAFrame::Init(nsIContent* aContent, | |
| 80 nsIFrame* aParent, | |
| 81 nsIFrame* aPrevInFlow) | |
| 82 { | |
| 83 NS_ASSERTION(aContent->IsSVG(nsGkAtoms::a), | |
| 84 "Trying to construct an SVGAFrame for a " | |
| 85 "content element that doesn't support the right interfaces"); | |
| 86 | |
| 87 nsSVGAFrameBase::Init(aContent, aParent, aPrevInFlow); | |
| 88 } | |
| 89 #endif /* DEBUG */ | |
| 90 | |
| 91 nsresult | |
| 92 nsSVGAFrame::AttributeChanged(int32_t aNameSpaceID, | |
| 93 nsIAtom* aAttribute, | |
| 94 int32_t aModType) | |
| 95 { | |
| 96 if (aNameSpaceID == kNameSpaceID_None && | |
| 97 aAttribute == nsGkAtoms::transform) { | |
| 98 // We don't invalidate for transform changes (the layers code does that). | |
| 99 // Also note that SVGTransformableElement::GetAttributeChangeHint will | |
| 100 // return nsChangeHint_UpdateOverflow for "transform" attribute changes | |
| 101 // and cause DoApplyRenderingChangeToTree to make the SchedulePaint call. | |
| 102 NotifySVGChanged(TRANSFORM_CHANGED); | |
| 103 } | |
| 104 | |
| 105 return NS_OK; | |
| 106 } | |
| 107 | |
| 108 nsIAtom * | |
| 109 nsSVGAFrame::GetType() const | |
| 110 { | |
| 111 return nsGkAtoms::svgAFrame; | |
| 112 } | |
| 113 | |
| 114 //---------------------------------------------------------------------- | |
| 115 // nsISVGChildFrame methods | |
| 116 | |
| 117 void | |
| 118 nsSVGAFrame::NotifySVGChanged(uint32_t aFlags) | |
| 119 { | |
| 120 NS_ABORT_IF_FALSE(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED), | |
| 121 "Invalidation logic may need adjusting"); | |
| 122 | |
| 123 if (aFlags & TRANSFORM_CHANGED) { | |
| 124 // make sure our cached transform matrix gets (lazily) updated | |
| 125 mCanvasTM = nullptr; | |
| 126 } | |
| 127 | |
| 128 nsSVGAFrameBase::NotifySVGChanged(aFlags); | |
| 129 } | |
| 130 | |
| 131 //---------------------------------------------------------------------- | |
| 132 // nsSVGContainerFrame methods: | |
| 133 | |
| 134 gfxMatrix | |
| 135 nsSVGAFrame::GetCanvasTM(uint32_t aFor, nsIFrame* aTransformRoot) | |
| 136 { | |
| 137 if (!(GetStateBits() & NS_FRAME_IS_NONDISPLAY) && !aTransformRoot) { | |
| 138 if ((aFor == FOR_PAINTING && NS_SVGDisplayListPaintingEnabled()) || | |
| 139 (aFor == FOR_HIT_TESTING && NS_SVGDisplayListHitTestingEnabled())) { | |
| 140 return nsSVGIntegrationUtils::GetCSSPxToDevPxMatrix(this); | |
| 141 } | |
| 142 } | |
| 143 if (!mCanvasTM) { | |
| 144 NS_ASSERTION(mParent, "null parent"); | |
| 145 | |
| 146 nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(mParent); | |
| 147 dom::SVGAElement *content = static_cast<dom::SVGAElement*>(mContent); | |
| 148 | |
| 149 gfxMatrix tm = content->PrependLocalTransformsTo( | |
| 150 this == aTransformRoot ? gfxMatrix() : | |
| 151 parent->GetCanvasTM(aFor, aTransformRoot)); | |
| 152 | |
| 153 mCanvasTM = new gfxMatrix(tm); | |
| 154 } | |
| 155 | |
| 156 return *mCanvasTM; | |
| 157 } |
