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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* Copyright (C) 2006 Rob Buis <buis@kde.org>
* (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2008 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 "core/css/CSSCursorImageValue.h"
#include "core/SVGNames.h"
#include "core/css/CSSImageSetValue.h"
#include "core/fetch/ImageResource.h"
#include "core/fetch/ResourceFetcher.h"
#include "core/rendering/style/StyleFetchedImage.h"
#include "core/rendering/style/StyleFetchedImageSet.h"
#include "core/rendering/style/StyleImage.h"
#include "core/rendering/style/StylePendingImage.h"
#include "core/svg/SVGCursorElement.h"
#include "core/svg/SVGLengthContext.h"
#include "core/svg/SVGURIReference.h"
#include "wtf/MathExtras.h"
#include "wtf/text/StringBuilder.h"
#include "wtf/text/WTFString.h"
namespace WebCore {
static inline SVGCursorElement* resourceReferencedByCursorElement(const String& url, TreeScope& treeScope)
{
Element* element = SVGURIReference::targetElementFromIRIString(url, treeScope);
return isSVGCursorElement(element) ? toSVGCursorElement(element) : 0;
}
CSSCursorImageValue::CSSCursorImageValue(PassRefPtrWillBeRawPtr<CSSValue> imageValue, bool hasHotSpot, const IntPoint& hotSpot)
: CSSValue(CursorImageClass)
, m_imageValue(imageValue)
, m_hasHotSpot(hasHotSpot)
, m_hotSpot(hotSpot)
, m_accessedImage(false)
{
}
CSSCursorImageValue::~CSSCursorImageValue()
{
// The below teardown is all handled by weak pointer processing in oilpan.
#if !ENABLE(OILPAN)
if (!isSVGCursor())
return;
HashSet<SVGElement*>::const_iterator it = m_referencedElements.begin();
HashSet<SVGElement*>::const_iterator end = m_referencedElements.end();
String url = toCSSImageValue(m_imageValue.get())->url();
for (; it != end; ++it) {
SVGElement* referencedElement = *it;
referencedElement->cursorImageValueRemoved();
if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, referencedElement->treeScope()))
cursorElement->removeClient(referencedElement);
}
#endif
}
String CSSCursorImageValue::customCSSText() const
{
StringBuilder result;
result.append(m_imageValue->cssText());
if (m_hasHotSpot) {
result.append(' ');
result.appendNumber(m_hotSpot.x());
result.append(' ');
result.appendNumber(m_hotSpot.y());
}
return result.toString();
}
bool CSSCursorImageValue::updateIfSVGCursorIsUsed(Element* element)
{
if (!element || !element->isSVGElement())
return false;
if (!isSVGCursor())
return false;
String url = toCSSImageValue(m_imageValue.get())->url();
if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, element->treeScope())) {
// FIXME: This will override hot spot specified in CSS, which is probably incorrect.
SVGLengthContext lengthContext(0);
m_hasHotSpot = true;
float x = roundf(cursorElement->x()->currentValue()->value(lengthContext));
m_hotSpot.setX(static_cast<int>(x));
float y = roundf(cursorElement->y()->currentValue()->value(lengthContext));
m_hotSpot.setY(static_cast<int>(y));
if (cachedImageURL() != element->document().completeURL(cursorElement->href()->currentValue()->value()))
clearImageResource();
SVGElement* svgElement = toSVGElement(element);
#if !ENABLE(OILPAN)
m_referencedElements.add(svgElement);
#endif
svgElement->setCursorImageValue(this);
cursorElement->addClient(svgElement);
return true;
}
return false;
}
StyleImage* CSSCursorImageValue::cachedImage(ResourceFetcher* loader, float deviceScaleFactor)
{
if (m_imageValue->isImageSetValue())
return toCSSImageSetValue(m_imageValue.get())->cachedImageSet(loader, deviceScaleFactor);
if (!m_accessedImage) {
m_accessedImage = true;
// For SVG images we need to lazily substitute in the correct URL. Rather than attempt
// to change the URL of the CSSImageValue (which would then change behavior like cssText),
// we create an alternate CSSImageValue to use.
if (isSVGCursor() && loader && loader->document()) {
RefPtrWillBeRawPtr<CSSImageValue> imageValue = toCSSImageValue(m_imageValue.get());
// FIXME: This will fail if the <cursor> element is in a shadow DOM (bug 59827)
if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(imageValue->url(), *loader->document())) {
RefPtrWillBeRawPtr<CSSImageValue> svgImageValue = CSSImageValue::create(loader->document()->completeURL(cursorElement->href()->currentValue()->value()));
svgImageValue->setReferrer(imageValue->referrer());
StyleFetchedImage* cachedImage = svgImageValue->cachedImage(loader);
m_image = cachedImage;
return cachedImage;
}
}
if (m_imageValue->isImageValue())
m_image = toCSSImageValue(m_imageValue.get())->cachedImage(loader);
}
if (m_image && m_image->isImageResource())
return toStyleFetchedImage(m_image);
return 0;
}
StyleImage* CSSCursorImageValue::cachedOrPendingImage(float deviceScaleFactor)
{
// Need to delegate completely so that changes in device scale factor can be handled appropriately.
if (m_imageValue->isImageSetValue())
return toCSSImageSetValue(m_imageValue.get())->cachedOrPendingImageSet(deviceScaleFactor);
if (!m_image)
m_image = StylePendingImage::create(this);
return m_image.get();
}
bool CSSCursorImageValue::isSVGCursor() const
{
if (m_imageValue->isImageValue()) {
RefPtrWillBeRawPtr<CSSImageValue> imageValue = toCSSImageValue(m_imageValue.get());
KURL kurl(ParsedURLString, imageValue->url());
return kurl.hasFragmentIdentifier();
}
return false;
}
String CSSCursorImageValue::cachedImageURL()
{
if (!m_image || !m_image->isImageResource())
return String();
return toStyleFetchedImage(m_image)->cachedImage()->url().string();
}
void CSSCursorImageValue::clearImageResource()
{
m_image = nullptr;
m_accessedImage = false;
}
#if !ENABLE(OILPAN)
void CSSCursorImageValue::removeReferencedElement(SVGElement* element)
{
m_referencedElements.remove(element);
}
#endif
bool CSSCursorImageValue::equals(const CSSCursorImageValue& other) const
{
return m_hasHotSpot ? other.m_hasHotSpot && m_hotSpot == other.m_hotSpot : !other.m_hasHotSpot
&& compareCSSValuePtr(m_imageValue, other.m_imageValue);
}
void CSSCursorImageValue::traceAfterDispatch(Visitor* visitor)
{
visitor->trace(m_imageValue);
CSSValue::traceAfterDispatch(visitor);
}
} // namespace WebCore
|
