1 /*
2 * Copyright (C) 2006 Rob Buis <buis@kde.org>
3 * (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
4 * Copyright (C) 2008 Apple Inc. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22 #include "config.h"
23 #include "CSSCursorImageValue.h"
24
25 #include "DocLoader.h"
26 #include "Document.h"
27 #include "PlatformString.h"
28 #include "RenderStyle.h"
29 #include <wtf/MathExtras.h>
30
31 #if ENABLE(SVG)
32 #include "SVGCursorElement.h"
33 #include "SVGURIReference.h"
34 #endif
35
36 namespace WebCore {
37
38 #if ENABLE(SVG)
isSVGCursorIdentifier(const String & url)39 static inline bool isSVGCursorIdentifier(const String& url)
40 {
41 KURL kurl(url);
42 return kurl.hasRef();
43 }
44
resourceReferencedByCursorElement(const String & fragmentId,Document * document)45 static inline SVGCursorElement* resourceReferencedByCursorElement(const String& fragmentId, Document* document)
46 {
47 Element* element = document->getElementById(SVGURIReference::getTarget(fragmentId));
48 if (element && element->hasTagName(SVGNames::cursorTag))
49 return static_cast<SVGCursorElement*>(element);
50
51 return 0;
52 }
53 #endif
54
CSSCursorImageValue(const String & url,const IntPoint & hotspot)55 CSSCursorImageValue::CSSCursorImageValue(const String& url, const IntPoint& hotspot)
56 : CSSImageValue(url)
57 , m_hotspot(hotspot)
58 {
59 }
60
~CSSCursorImageValue()61 CSSCursorImageValue::~CSSCursorImageValue()
62 {
63 #if ENABLE(SVG)
64 const String& url = getStringValue();
65 if (!isSVGCursorIdentifier(url))
66 return;
67
68 HashSet<SVGElement*>::const_iterator it = m_referencedElements.begin();
69 HashSet<SVGElement*>::const_iterator end = m_referencedElements.end();
70
71 for (; it != end; ++it) {
72 SVGElement* referencedElement = *it;
73 referencedElement->setCursorImageValue(0);
74 if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, referencedElement->document()))
75 cursorElement->removeClient(referencedElement);
76 }
77 #endif
78 }
79
updateIfSVGCursorIsUsed(Element * element)80 bool CSSCursorImageValue::updateIfSVGCursorIsUsed(Element* element)
81 {
82 #if ENABLE(SVG)
83 if (!element || !element->isSVGElement())
84 return false;
85
86 const String& url = getStringValue();
87 if (!isSVGCursorIdentifier(url))
88 return false;
89
90 if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, element->document())) {
91 float x = roundf(cursorElement->x().value(0));
92 m_hotspot.setX(static_cast<int>(x));
93
94 float y = roundf(cursorElement->y().value(0));
95 m_hotspot.setY(static_cast<int>(y));
96
97 if (cachedImageURL() != element->document()->completeURL(cursorElement->href()))
98 clearCachedImage();
99
100 SVGElement* svgElement = static_cast<SVGElement*>(element);
101 m_referencedElements.add(svgElement);
102 svgElement->setCursorImageValue(this);
103 cursorElement->addClient(svgElement);
104 return true;
105 }
106 #endif
107
108 return false;
109 }
110
cachedImage(DocLoader * loader)111 StyleCachedImage* CSSCursorImageValue::cachedImage(DocLoader* loader)
112 {
113 String url = getStringValue();
114
115 #if ENABLE(SVG)
116 if (isSVGCursorIdentifier(url) && loader && loader->doc()) {
117 if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, loader->doc()))
118 url = cursorElement->href();
119 }
120 #endif
121
122 return CSSImageValue::cachedImage(loader, url);
123 }
124
125 #if ENABLE(SVG)
removeReferencedElement(SVGElement * element)126 void CSSCursorImageValue::removeReferencedElement(SVGElement* element)
127 {
128 m_referencedElements.remove(element);
129 }
130 #endif
131
132 } // namespace WebCore
133