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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*
* Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
* Copyright (C) 2008 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
* Copyright (C) 2018-2019 Apple Inc. All rights reserved.
*
* 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 "config.h"
#include "SVGLinearGradientElement.h"
#include "Document.h"
#include "FloatPoint.h"
#include "LinearGradientAttributes.h"
#include "NodeName.h"
#include "RenderSVGResourceLinearGradient.h"
#include "SVGElementTypeHelpers.h"
#include "SVGLengthValue.h"
#include "SVGNames.h"
#include "SVGUnitTypes.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/NeverDestroyed.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(SVGLinearGradientElement);
inline SVGLinearGradientElement::SVGLinearGradientElement(const QualifiedName& tagName, Document& document)
: SVGGradientElement(tagName, document, makeUniqueRef<PropertyRegistry>(*this))
{
// Spec: If the x2 attribute is not specified, the effect is as if a value of "100%" were specified.
ASSERT(hasTagName(SVGNames::linearGradientTag));
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
PropertyRegistry::registerProperty<SVGNames::x1Attr, &SVGLinearGradientElement::m_x1>();
PropertyRegistry::registerProperty<SVGNames::y1Attr, &SVGLinearGradientElement::m_y1>();
PropertyRegistry::registerProperty<SVGNames::x2Attr, &SVGLinearGradientElement::m_x2>();
PropertyRegistry::registerProperty<SVGNames::y2Attr, &SVGLinearGradientElement::m_y2>();
});
}
Ref<SVGLinearGradientElement> SVGLinearGradientElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new SVGLinearGradientElement(tagName, document));
}
void SVGLinearGradientElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason attributeModificationReason)
{
SVGParsingError parseError = NoError;
switch (name.nodeName()) {
case AttributeNames::x1Attr:
m_x1->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Width, newValue, parseError));
break;
case AttributeNames::y1Attr:
m_y1->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Height, newValue, parseError));
break;
case AttributeNames::x2Attr:
m_x2->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Width, newValue, parseError));
break;
case AttributeNames::y2Attr:
m_y2->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Height, newValue, parseError));
break;
default:
break;
}
reportAttributeParsingError(parseError, name, newValue);
SVGGradientElement::attributeChanged(name, oldValue, newValue, attributeModificationReason);
}
void SVGLinearGradientElement::svgAttributeChanged(const QualifiedName& attrName)
{
if (PropertyRegistry::isKnownAttribute(attrName)) {
InstanceInvalidationGuard guard(*this);
updateRelativeLengthsInformation();
updateSVGRendererForElementChange();
return;
}
SVGGradientElement::svgAttributeChanged(attrName);
}
RenderPtr<RenderElement> SVGLinearGradientElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
return createRenderer<RenderSVGResourceLinearGradient>(*this, WTFMove(style));
}
static void setGradientAttributes(SVGGradientElement& element, LinearGradientAttributes& attributes, bool isLinear = true)
{
if (!attributes.hasSpreadMethod() && element.hasAttribute(SVGNames::spreadMethodAttr))
attributes.setSpreadMethod(element.spreadMethod());
if (!attributes.hasGradientUnits() && element.hasAttribute(SVGNames::gradientUnitsAttr))
attributes.setGradientUnits(element.gradientUnits());
if (!attributes.hasGradientTransform() && element.hasAttribute(SVGNames::gradientTransformAttr))
attributes.setGradientTransform(element.gradientTransform().concatenate());
if (!attributes.hasStops())
attributes.setStops(element.buildStops());
if (isLinear) {
SVGLinearGradientElement& linear = downcast<SVGLinearGradientElement>(element);
if (!attributes.hasX1() && element.hasAttribute(SVGNames::x1Attr))
attributes.setX1(linear.x1());
if (!attributes.hasY1() && element.hasAttribute(SVGNames::y1Attr))
attributes.setY1(linear.y1());
if (!attributes.hasX2() && element.hasAttribute(SVGNames::x2Attr))
attributes.setX2(linear.x2());
if (!attributes.hasY2() && element.hasAttribute(SVGNames::y2Attr))
attributes.setY2(linear.y2());
}
}
bool SVGLinearGradientElement::collectGradientAttributes(LinearGradientAttributes& attributes)
{
if (!renderer())
return false;
HashSet<Ref<SVGGradientElement>> processedGradients;
Ref<SVGGradientElement> current { *this };
setGradientAttributes(current.get(), attributes);
processedGradients.add(current.copyRef());
while (true) {
// Respect xlink:href, take attributes from referenced element
auto target = SVGURIReference::targetElementFromIRIString(current->href(), treeScopeForSVGReferences());
if (is<SVGGradientElement>(target.element)) {
current = downcast<SVGGradientElement>(*target.element);
// Cycle detection
if (processedGradients.contains(current))
return true;
if (!current->renderer())
return false;
setGradientAttributes(current.get(), attributes, current->hasTagName(SVGNames::linearGradientTag));
processedGradients.add(current.copyRef());
} else
return true;
}
ASSERT_NOT_REACHED();
return false;
}
bool SVGLinearGradientElement::selfHasRelativeLengths() const
{
return x1().isRelative()
|| y1().isRelative()
|| x2().isRelative()
|| y2().isRelative();
}
}
|
