--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/xml/XSLImportRule.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,117 @@
+/*
+ * This file is part of the XSL implementation.
+ *
+ * Copyright (C) 2004, 2005, 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 "XSLImportRule.h"
+
+#if ENABLE(XSLT)
+
+#include "CachedXSLStyleSheet.h"
+#include "DocLoader.h"
+#include "XSLStyleSheet.h"
+
+namespace WebCore {
+
+XSLImportRule::XSLImportRule(XSLStyleSheet* parent, const String& href)
+    : StyleBase(parent)
+    , m_strHref(href)
+    , m_cachedSheet(0)
+    , m_loading(false)
+{
+}
+
+XSLImportRule::~XSLImportRule()
+{
+    if (m_styleSheet)
+        m_styleSheet->setParent(0);
+    
+    if (m_cachedSheet)
+        m_cachedSheet->removeClient(this);
+}
+
+XSLStyleSheet* XSLImportRule::parentStyleSheet() const
+{
+    return (parent() && parent()->isXSLStyleSheet()) ? static_cast<XSLStyleSheet*>(parent()) : 0;
+}
+
+void XSLImportRule::setXSLStyleSheet(const String& href, const KURL& baseURL, const String& sheet)
+{
+    if (m_styleSheet)
+        m_styleSheet->setParent(0);
+
+    m_styleSheet = XSLStyleSheet::create(this, href, baseURL);
+
+    XSLStyleSheet* parent = parentStyleSheet();
+    if (parent)
+        m_styleSheet->setParentStyleSheet(parent);
+
+    m_styleSheet->parseString(sheet);
+    m_loading = false;
+    
+    if (parent)
+        parent->checkLoaded();
+}
+
+bool XSLImportRule::isLoading()
+{
+    return (m_loading || (m_styleSheet && m_styleSheet->isLoading()));
+}
+
+void XSLImportRule::loadSheet()
+{
+    DocLoader* docLoader = 0;
+    StyleBase* root = this;
+    StyleBase* parent;
+    while ((parent = root->parent()))
+        root = parent;
+    if (root->isXSLStyleSheet())
+        docLoader = static_cast<XSLStyleSheet*>(root)->docLoader();
+    
+    String absHref = m_strHref;
+    XSLStyleSheet* parentSheet = parentStyleSheet();
+    if (!parentSheet->finalURL().isNull())
+        // use parent styleheet's URL as the base URL
+        absHref = KURL(parentSheet->finalURL(), m_strHref).string();
+    
+    // Check for a cycle in our import chain.  If we encounter a stylesheet
+    // in our parent chain with the same URL, then just bail.
+    for (parent = this->parent(); parent; parent = parent->parent()) {
+        if (parent->isXSLStyleSheet() && absHref == static_cast<XSLStyleSheet*>(parent)->finalURL().string())
+            return;
+    }
+    
+    m_cachedSheet = docLoader->requestXSLStyleSheet(absHref);
+    
+    if (m_cachedSheet) {
+        m_cachedSheet->addClient(this);
+        
+        // If the imported sheet is in the cache, then setXSLStyleSheet gets called,
+        // and the sheet even gets parsed (via parseString).  In this case we have
+        // loaded (even if our subresources haven't), so if we have a stylesheet after
+        // checking the cache, then we've clearly loaded.
+        if (!m_styleSheet)
+            m_loading = true;
+    }
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(XSLT)