diff -r 000000000000 -r 4f2f89ce4247 WebCore/html/HTMLBaseElement.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/html/HTMLBaseElement.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ *           (C) 1999 Antti Koivisto (koivisto@kde.org)
+ *           (C) 2001 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2003, 2008, 2009, 2010 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 "HTMLBaseElement.h"
+
+#include "Attribute.h"
+#include "CSSHelper.h"
+#include "Document.h"
+#include "Frame.h"
+#include "HTMLNames.h"
+#include "XSSAuditor.h"
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+inline HTMLBaseElement::HTMLBaseElement(const QualifiedName& tagName, Document* document)
+    : HTMLElement(tagName, document)
+{
+    ASSERT(hasTagName(baseTag));
+}
+
+PassRefPtr<HTMLBaseElement> HTMLBaseElement::create(const QualifiedName& tagName, Document* document)
+{
+    return adoptRef(new HTMLBaseElement(tagName, document));
+}
+
+void HTMLBaseElement::parseMappedAttribute(Attribute* attr)
+{
+    if (attr->name() == hrefAttr) {
+        m_hrefAttrValue = attr->value();
+        m_href = deprecatedParseURL(attr->value());
+        process();
+    } else if (attr->name() == targetAttr) {
+        m_target = attr->value();
+        process();
+    } else
+        HTMLElement::parseMappedAttribute(attr);
+}
+
+void HTMLBaseElement::insertedIntoDocument()
+{
+    HTMLElement::insertedIntoDocument();
+    process();
+}
+
+void HTMLBaseElement::removedFromDocument()
+{
+    HTMLElement::removedFromDocument();
+
+    // Since the document doesn't have a base element, clear the base URL and target.
+    // FIXME: This does not handle the case of multiple base elements correctly.
+    document()->setBaseElementURL(KURL());
+    document()->setBaseElementTarget(String());
+}
+
+void HTMLBaseElement::process()
+{
+    if (!inDocument())
+        return;
+
+    if (!m_href.isEmpty() && (!document()->frame() || document()->frame()->script()->xssAuditor()->canSetBaseElementURL(m_hrefAttrValue)))
+        document()->setBaseElementURL(KURL(document()->url(), m_href));
+
+    if (!m_target.isEmpty())
+        document()->setBaseElementTarget(m_target);
+
+    // FIXME: Changing a document's base URL should probably automatically update the resolved relative URLs of all images, stylesheets, etc.
+}
+
+}