1 files changed, 136 insertions, 0 deletions
diff --git a/Source/WebCore/css/CSSCursorImageValue.cpp b/Source/WebCore/css/CSSCursorImageValue.cpp
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+++ b/Source/WebCore/css/CSSCursorImageValue.cpp
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+/*
+ * 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 "CSSCursorImageValue.h"
+
+#include "CachedResourceLoader.h"
+#include "Document.h"
+#include "PlatformString.h"
+#include <wtf/MathExtras.h>
+#include <wtf/UnusedParam.h>
+
+#if ENABLE(SVG)
+#include "SVGCursorElement.h"
+#include "SVGNames.h"
+#include "SVGURIReference.h"
+#endif
+
+namespace WebCore {
+
+#if ENABLE(SVG)
+static inline bool isSVGCursorIdentifier(const String& url)
+{
+    KURL kurl(ParsedURLString, url);
+    return kurl.hasFragmentIdentifier();
+}
+
+static inline SVGCursorElement* resourceReferencedByCursorElement(const String& fragmentId, Document* document)
+{
+    Element* element = document->getElementById(SVGURIReference::getTarget(fragmentId));
+    if (element && element->hasTagName(SVGNames::cursorTag))
+        return static_cast<SVGCursorElement*>(element);
+
+    return 0;
+}
+#endif
+
+CSSCursorImageValue::CSSCursorImageValue(const String& url, const IntPoint& hotSpot)
+    : CSSImageValue(url)
+    , m_hotSpot(hotSpot)
+{
+}
+
+CSSCursorImageValue::~CSSCursorImageValue()
+{
+#if ENABLE(SVG)
+    const String& url = getStringValue();
+    if (!isSVGCursorIdentifier(url))
+        return;
+
+    HashSet<SVGElement*>::const_iterator it = m_referencedElements.begin();
+    HashSet<SVGElement*>::const_iterator end = m_referencedElements.end();
+
+    for (; it != end; ++it) {
+        SVGElement* referencedElement = *it;
+        referencedElement->cursorImageValueRemoved();
+        if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, referencedElement->document()))
+            cursorElement->removeClient(referencedElement);
+    }
+#endif
+}
+
+bool CSSCursorImageValue::updateIfSVGCursorIsUsed(Element* element)
+{
+#if !ENABLE(SVG)
+    UNUSED_PARAM(element);
+#else
+    if (!element || !element->isSVGElement())
+        return false;
+
+    const String& url = getStringValue();
+    if (!isSVGCursorIdentifier(url))
+        return false;
+
+    if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, element->document())) {
+        // FIXME: This will override hot spot specified in CSS, which is probably incorrect.
+        float x = roundf(cursorElement->x().value(0));
+        m_hotSpot.setX(static_cast<int>(x));
+
+        float y = roundf(cursorElement->y().value(0));
+        m_hotSpot.setY(static_cast<int>(y));
+
+        if (cachedImageURL() != element->document()->completeURL(cursorElement->href()))
+            clearCachedImage();
+
+        SVGElement* svgElement = static_cast<SVGElement*>(element);
+        m_referencedElements.add(svgElement);
+        svgElement->setCursorImageValue(this);
+        cursorElement->addClient(svgElement);
+        return true;
+    }
+#endif
+
+    return false;
+}
+
+StyleCachedImage* CSSCursorImageValue::cachedImage(CachedResourceLoader* loader)
+{
+    String url = getStringValue();
+
+#if ENABLE(SVG) 
+    if (isSVGCursorIdentifier(url) && loader && loader->document()) {
+        if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, loader->document()))
+            url = cursorElement->href();
+    }
+#endif
+
+    return CSSImageValue::cachedImage(loader, url);
+}
+
+#if ENABLE(SVG)
+void CSSCursorImageValue::removeReferencedElement(SVGElement* element)
+{
+    m_referencedElements.remove(element);
+}
+#endif
+
+} // namespace WebCore