1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef NS_SVGCONTAINERFRAME_H
#define NS_SVGCONTAINERFRAME_H
#include "mozilla/Attributes.h"
#include "nsContainerFrame.h"
#include "nsFrame.h"
#include "nsIFrame.h"
#include "nsISVGChildFrame.h"
#include "nsQueryFrame.h"
#include "nsRect.h"
#include "nsSVGUtils.h"
class gfxContext;
class nsFrameList;
class nsIContent;
class nsIPresShell;
class nsStyleContext;
struct nsRect;
/**
* Base class for SVG container frames. Frame sub-classes that do not
* display their contents directly (such as the frames for <marker> or
* <pattern>) just inherit this class. Frame sub-classes that do or can
* display their contents directly (such as the frames for inner-<svg> or
* <g>) inherit our nsDisplayContainerFrame sub-class.
*
* *** WARNING ***
*
* Do *not* blindly cast to SVG element types in this class's methods (see the
* warning comment for nsSVGDisplayContainerFrame below).
*/
class nsSVGContainerFrame : public nsContainerFrame
{
friend nsIFrame* NS_NewSVGContainerFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext);
protected:
explicit nsSVGContainerFrame(nsStyleContext* aContext)
: nsContainerFrame(aContext)
{
AddStateBits(NS_FRAME_SVG_LAYOUT);
}
public:
NS_DECL_QUERYFRAME_TARGET(nsSVGContainerFrame)
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
// Returns the transform to our gfxContext (to device pixels, not CSS px)
virtual gfxMatrix GetCanvasTM() {
return gfxMatrix();
}
/**
* Returns true if the frame's content has a transform that applies only to
* its children, and not to the frame itself. For example, an implicit
* transform introduced by a 'viewBox' attribute, or an explicit transform
* due to a root-<svg> having its currentScale/currentTransform properties
* set. If aTransform is non-null, then it will be set to the transform.
*/
virtual bool HasChildrenOnlyTransform(Matrix *aTransform) const {
return false;
}
// nsIFrame:
virtual void AppendFrames(ChildListID aListID,
nsFrameList& aFrameList) override;
virtual void InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList) override;
virtual void RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame) override;
virtual bool IsFrameOfType(uint32_t aFlags) const override
{
return nsContainerFrame::IsFrameOfType(
aFlags & ~(nsIFrame::eSVG | nsIFrame::eSVGContainer));
}
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) override {}
virtual bool ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas) override;
protected:
/**
* Traverses a frame tree, marking any SVGTextFrame frames as dirty
* and calling InvalidateRenderingObservers() on it.
*/
static void ReflowSVGNonDisplayText(nsIFrame* aContainer);
};
/**
* Frame class or base-class for SVG containers that can or do display their
* contents directly.
*
* *** WARNING ***
*
* This class's methods can *not* assume that mContent points to an instance of
* an SVG element class since this class is inherited by
* nsSVGGenericContainerFrame which is used for unrecognized elements in the
* SVG namespace. Do *not* blindly cast to SVG element types.
*/
class nsSVGDisplayContainerFrame : public nsSVGContainerFrame,
public nsISVGChildFrame
{
protected:
explicit nsSVGDisplayContainerFrame(nsStyleContext* aContext)
: nsSVGContainerFrame(aContext)
{
AddStateBits(NS_FRAME_MAY_BE_TRANSFORMED);
}
public:
NS_DECL_QUERYFRAME_TARGET(nsSVGDisplayContainerFrame)
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
// nsIFrame:
virtual void InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList) override;
virtual void RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame) override;
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) override;
virtual bool IsSVGTransformed(Matrix *aOwnTransform = nullptr,
Matrix *aFromParentTransform = nullptr) const override;
// nsISVGChildFrame interface:
virtual DrawResult PaintSVG(gfxContext& aContext,
const gfxMatrix& aTransform,
const nsIntRect *aDirtyRect = nullptr) override;
virtual nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override;
virtual nsRect GetCoveredRegion() override;
virtual void ReflowSVG() override;
virtual void NotifySVGChanged(uint32_t aFlags) override;
virtual SVGBBox GetBBoxContribution(const Matrix &aToBBoxUserspace,
uint32_t aFlags) override;
virtual bool IsDisplayContainer() override { return true; }
};
#endif
|
