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
|
/*
* Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2008 Rob Buis <buis@kde.org>
* Copyright (C) 2005, 2007 Eric Seidel <eric@webkit.org>
* Copyright (C) 2009 Google, Inc.
* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
* Copyright (C) 2009 Jeff Schiller <codedread@gmail.com>
* Copyright (C) 2011 Renata Hodovan <reni@webkit.org>
* Copyright (C) 2011 University of Szeged
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "core/layout/svg/LayoutSVGPath.h"
#include "core/layout/svg/LayoutSVGResourceMarker.h"
#include "core/layout/svg/SVGResources.h"
#include "core/layout/svg/SVGResourcesCache.h"
#include "core/svg/SVGGeometryElement.h"
#include "wtf/MathExtras.h"
namespace blink {
LayoutSVGPath::LayoutSVGPath(SVGGeometryElement* node)
: LayoutSVGShape(node)
{
}
LayoutSVGPath::~LayoutSVGPath()
{
}
void LayoutSVGPath::updateShapeFromElement()
{
LayoutSVGShape::updateShapeFromElement();
processMarkerPositions();
m_strokeBoundingBox = calculateUpdatedStrokeBoundingBox();
}
FloatRect LayoutSVGPath::hitTestStrokeBoundingBox() const
{
const SVGComputedStyle& svgStyle = style()->svgStyle();
if (svgStyle.hasStroke())
return m_strokeBoundingBox;
// Implementation of http://dev.w3.org/fxtf/css-masking-1/#compute-stroke-bounding-box
// except that we ignore whether the stroke is none.
FloatRect box = m_fillBoundingBox;
const float strokeWidth = this->strokeWidth();
if (strokeWidth <= 0)
return box;
float delta = strokeWidth / 2;
if (svgStyle.hasMiterJoinStyle()) {
const float miter = svgStyle.strokeMiterLimit();
if (miter < M_SQRT2 && svgStyle.hasSquareCapStyle())
delta *= M_SQRT2;
else
delta *= miter;
} else if (svgStyle.hasSquareCapStyle()) {
delta *= M_SQRT2;
}
box.inflate(delta);
return box;
}
FloatRect LayoutSVGPath::calculateUpdatedStrokeBoundingBox() const
{
FloatRect strokeBoundingBox = m_strokeBoundingBox;
if (!m_markerPositions.isEmpty())
strokeBoundingBox.unite(markerRect(strokeWidth()));
return strokeBoundingBox;
}
FloatRect LayoutSVGPath::markerRect(float strokeWidth) const
{
ASSERT(!m_markerPositions.isEmpty());
SVGResources* resources = SVGResourcesCache::cachedResourcesForLayoutObject(this);
ASSERT(resources);
LayoutSVGResourceMarker* markerStart = resources->markerStart();
LayoutSVGResourceMarker* markerMid = resources->markerMid();
LayoutSVGResourceMarker* markerEnd = resources->markerEnd();
ASSERT(markerStart || markerMid || markerEnd);
FloatRect boundaries;
unsigned size = m_markerPositions.size();
for (unsigned i = 0; i < size; ++i) {
if (LayoutSVGResourceMarker* marker = SVGMarkerData::markerForType(m_markerPositions[i].type, markerStart, markerMid, markerEnd))
boundaries.unite(marker->markerBoundaries(marker->markerTransformation(m_markerPositions[i].origin, m_markerPositions[i].angle, strokeWidth)));
}
return boundaries;
}
bool LayoutSVGPath::shouldGenerateMarkerPositions() const
{
if (!style()->svgStyle().hasMarkers())
return false;
if (!SVGResources::supportsMarkers(*toSVGGraphicsElement(element())))
return false;
SVGResources* resources = SVGResourcesCache::cachedResourcesForLayoutObject(this);
if (!resources)
return false;
return resources->markerStart() || resources->markerMid() || resources->markerEnd();
}
void LayoutSVGPath::processMarkerPositions()
{
m_markerPositions.clear();
if (!shouldGenerateMarkerPositions())
return;
SVGResources* resources = SVGResourcesCache::cachedResourcesForLayoutObject(this);
ASSERT(resources);
LayoutSVGResourceMarker* markerStart = resources->markerStart();
SVGMarkerData markerData(m_markerPositions, markerStart ? markerStart->orientType() == SVGMarkerOrientAutoStartReverse : false);
path().apply(&markerData, SVGMarkerData::updateFromPathElement);
markerData.pathIsDone();
}
} // namespace blink
|
