1 files changed, 130 insertions, 0 deletions
diff --git a/WebCore/css/CSSCursorImageValue.cpp b/WebCore/css/CSSCursorImageValue.cpp
new file mode 100644
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+++ b/WebCore/css/CSSCursorImageValue.cpp
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+/**
+ * This file is part of the DOM implementation for KDE.
+ *
+ * Copyright (C) 2006 Rob Buis <buis@kde.org>
+ *           (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
+ *
+ * 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 "CachedImage.h"
+#include "DocLoader.h"
+#include "PlatformString.h"
+
+#if ENABLE(SVG)
+#include "SVGCursorElement.h"
+#include "SVGURIReference.h"
+#endif
+
+#include <wtf/MathExtras.h>
+
+namespace WebCore {
+
+#if ENABLE(SVG)
+inline bool isSVGCursorIdentifier(const String& url)
+{
+    KURL kurl(url);
+    return kurl.hasRef();
+}
+
+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, StyleBase* style)
+    : CSSImageValue(url, style)
+    , 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;
+        if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, referencedElement->document()))
+            cursorElement->removeClient(referencedElement);
+    }
+#endif
+}
+
+bool CSSCursorImageValue::updateIfSVGCursorIsUsed(Element* element)
+{
+#if ENABLE(SVG)
+    if (!element || !element->isSVGElement())
+        return false;
+
+    const String& url = getStringValue();
+    if (!isSVGCursorIdentifier(url))
+        return false;
+
+    if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, element->document())) {
+        int x = roundf(cursorElement->x().value());
+        if (x != m_hotspot.x())
+            m_hotspot.setX(x);
+
+        int y = roundf(cursorElement->y().value());
+        if (y != m_hotspot.y())
+            m_hotspot.setY(y);
+
+        if (m_image && m_image->url() != element->document()->completeURL(cursorElement->href())) {
+            m_image->deref(this);
+            m_image = 0;
+
+            m_accessedImage = false;
+        }
+
+        SVGElement* svgElement = static_cast<SVGElement*>(element);
+        m_referencedElements.add(svgElement);
+        cursorElement->addClient(svgElement);
+        return true;
+    }
+#endif
+
+    return false;
+}
+
+CachedImage* CSSCursorImageValue::image(DocLoader* loader)
+{
+    String url = getStringValue();
+
+#if ENABLE(SVG) 
+    if (isSVGCursorIdentifier(url) && loader && loader->doc()) {
+        if (SVGCursorElement* cursorElement = resourceReferencedByCursorElement(url, loader->doc()))
+            url = cursorElement->href();
+    }
+#endif
+
+    return CSSImageValue::image(loader, url);
+}
+
+} // namespace WebCore