--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/css/StyleBase.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
+ *               1999 Waldo Bastian (bastian@kde.org)
+ *               2001 Andreas Schlapbach (schlpbch@iam.unibe.ch)
+ *               2001-2003 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2002, 2006, 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 "StyleBase.h"
+
+#include "Document.h"
+#include "Node.h"
+#include "StyleSheet.h"
+
+namespace WebCore {
+
+String StyleBase::cssText() const
+{
+    return "";
+}
+
+void StyleBase::checkLoaded()
+{
+    if (parent())
+        parent()->checkLoaded();
+}
+
+StyleSheet* StyleBase::stylesheet()
+{
+    StyleBase *b = this;
+    while (b && !b->isStyleSheet())
+        b = b->parent();
+    return static_cast<StyleSheet*>(b);
+}
+
+KURL StyleBase::baseURL() const
+{
+    // Try to find the style sheet. If found look for its URL.
+    // If it has none, get the URL from the parent sheet or the parent node.
+
+    StyleSheet* sheet = const_cast<StyleBase*>(this)->stylesheet();
+    if (!sheet)
+        return KURL();
+    if (!sheet->finalURL().isNull())
+        return sheet->finalURL();
+    if (sheet->parent())
+        return sheet->parent()->baseURL();
+    if (!sheet->ownerNode()) 
+        return KURL();
+    return sheet->ownerNode()->document()->baseURL();
+}
+
+}