layout/svg/nsSVGMarkerFrame.h@97036ab72558
layout/svg/nsSVGMarkerFrame.h
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.
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 #ifndef __NS_SVGMARKERFRAME_H__
7 #define __NS_SVGMARKERFRAME_H__
9 #include "mozilla/Attributes.h"
10 #include "gfxMatrix.h"
11 #include "gfxRect.h"
12 #include "nsFrame.h"
13 #include "nsLiteralString.h"
14 #include "nsQueryFrame.h"
15 #include "nsSVGContainerFrame.h"
16 #include "nsSVGUtils.h"
18 class nsIAtom;
19 class nsIContent;
20 class nsIFrame;
21 class nsIPresShell;
22 class nsRenderingContext;
23 class nsStyleContext;
24 class nsSVGPathGeometryFrame;
26 namespace mozilla {
27 namespace dom {
28 class SVGSVGElement;
29 }
30 }
32 struct nsSVGMark;
34 typedef nsSVGContainerFrame nsSVGMarkerFrameBase;
36 class nsSVGMarkerFrame : public nsSVGMarkerFrameBase
37 {
38 friend class nsSVGMarkerAnonChildFrame;
39 friend nsIFrame*
40 NS_NewSVGMarkerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
41 protected:
42 nsSVGMarkerFrame(nsStyleContext* aContext)
43 : nsSVGMarkerFrameBase(aContext)
44 , mMarkedFrame(nullptr)
45 , mInUse(false)
46 , mInUse2(false)
47 {
48 AddStateBits(NS_FRAME_IS_NONDISPLAY);
49 }
51 public:
52 NS_DECL_FRAMEARENA_HELPERS
54 // nsIFrame interface:
55 #ifdef DEBUG
56 virtual void Init(nsIContent* aContent,
57 nsIFrame* aParent,
58 nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
59 #endif
61 virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
62 const nsRect& aDirtyRect,
63 const nsDisplayListSet& aLists) MOZ_OVERRIDE {}
65 virtual nsresult AttributeChanged(int32_t aNameSpaceID,
66 nsIAtom* aAttribute,
67 int32_t aModType) MOZ_OVERRIDE;
68 /**
69 * Get the "type" of the frame
70 *
71 * @see nsGkAtoms::svgMarkerFrame
72 */
73 virtual nsIAtom* GetType() const MOZ_OVERRIDE;
75 #ifdef DEBUG_FRAME_DUMP
76 virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
77 {
78 return MakeFrameName(NS_LITERAL_STRING("SVGMarker"), aResult);
79 }
80 #endif
82 virtual nsIFrame* GetContentInsertionFrame() MOZ_OVERRIDE {
83 // Any children must be added to our single anonymous inner frame kid.
84 NS_ABORT_IF_FALSE(GetFirstPrincipalChild() &&
85 GetFirstPrincipalChild()->GetType() ==
86 nsGkAtoms::svgMarkerAnonChildFrame,
87 "Where is our anonymous child?");
88 return GetFirstPrincipalChild()->GetContentInsertionFrame();
89 }
91 // nsSVGMarkerFrame methods:
92 nsresult PaintMark(nsRenderingContext *aContext,
93 nsSVGPathGeometryFrame *aMarkedFrame,
94 nsSVGMark *aMark,
95 float aStrokeWidth);
97 SVGBBox GetMarkBBoxContribution(const Matrix &aToBBoxUserspace,
98 uint32_t aFlags,
99 nsSVGPathGeometryFrame *aMarkedFrame,
100 const nsSVGMark *aMark,
101 float aStrokeWidth);
103 private:
104 // stuff needed for callback
105 nsSVGPathGeometryFrame *mMarkedFrame;
106 float mStrokeWidth, mX, mY, mAutoAngle;
107 bool mIsStart; // whether the callback is for a marker-start marker
109 // nsSVGContainerFrame methods:
110 virtual gfxMatrix GetCanvasTM(uint32_t aFor,
111 nsIFrame* aTransformRoot = nullptr) MOZ_OVERRIDE;
113 // A helper class to allow us to paint markers safely. The helper
114 // automatically sets and clears the mInUse flag on the marker frame (to
115 // prevent nasty reference loops) as well as the reference to the marked
116 // frame and its coordinate context. It's easy to mess this up
117 // and break things, so this helper makes the code far more robust.
118 class MOZ_STACK_CLASS AutoMarkerReferencer
119 {
120 public:
121 AutoMarkerReferencer(nsSVGMarkerFrame *aFrame,
122 nsSVGPathGeometryFrame *aMarkedFrame
123 MOZ_GUARD_OBJECT_NOTIFIER_PARAM);
124 ~AutoMarkerReferencer();
125 private:
126 nsSVGMarkerFrame *mFrame;
127 MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
128 };
130 // nsSVGMarkerFrame methods:
131 void SetParentCoordCtxProvider(mozilla::dom::SVGSVGElement *aContext);
133 // recursion prevention flag
134 bool mInUse;
136 // second recursion prevention flag, for GetCanvasTM()
137 bool mInUse2;
138 };
140 ////////////////////////////////////////////////////////////////////////
141 // nsMarkerAnonChildFrame class
143 typedef nsSVGDisplayContainerFrame nsSVGMarkerAnonChildFrameBase;
145 /**
146 */
147 class nsSVGMarkerAnonChildFrame
148 : public nsSVGMarkerAnonChildFrameBase
149 {
150 friend nsIFrame*
151 NS_NewSVGMarkerAnonChildFrame(nsIPresShell* aPresShell,
152 nsStyleContext* aContext);
154 nsSVGMarkerAnonChildFrame(nsStyleContext* aContext)
155 : nsSVGMarkerAnonChildFrameBase(aContext)
156 {}
158 public:
159 NS_DECL_FRAMEARENA_HELPERS
161 #ifdef DEBUG
162 virtual void Init(nsIContent* aContent,
163 nsIFrame* aParent,
164 nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
165 #endif
167 #ifdef DEBUG_FRAME_DUMP
168 virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE {
169 return MakeFrameName(NS_LITERAL_STRING("SVGMarkerAnonChild"), aResult);
170 }
171 #endif
173 /**
174 * Get the "type" of the frame
175 *
176 * @see nsGkAtoms::svgMarkerAnonChildFrame
177 */
178 virtual nsIAtom* GetType() const MOZ_OVERRIDE;
180 // nsSVGContainerFrame methods:
181 virtual gfxMatrix GetCanvasTM(uint32_t aFor,
182 nsIFrame* aTransformRoot = nullptr) MOZ_OVERRIDE
183 {
184 nsSVGMarkerFrame* marker = static_cast<nsSVGMarkerFrame*>(mParent);
185 return marker->GetCanvasTM(aFor, aTransformRoot);
186 }
187 };
188 #endif
