Revert 78101 - Merge r76728, crbug 68263

WebCore/xml/XSLStyleSheetLibxslt.cpp

 /*
  * 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.
  *
@@ skipping 39 matching lines @@
 SOFT_LINK(libxslt, xsltIsBlank, int, (xmlChar *str), (str))
 SOFT_LINK(libxslt, xsltGetNsProp, xmlChar *, (xmlNodePtr node, const xmlChar *name, const xmlChar *nameSpace), (node, name, nameSpace))
 SOFT_LINK(libxslt, xsltParseStylesheetDoc, xsltStylesheetPtr, (xmlDocPtr doc), (doc))
 SOFT_LINK(libxslt, xsltLoadStylesheetPI, xsltStylesheetPtr, (xmlDocPtr doc), (doc))
 #endif
 
 namespace WebCore {
 
 XSLStyleSheet::XSLStyleSheet(XSLImportRule* parentRule, const String& originalURL, const KURL& finalURL)
     : StyleSheet(parentRule, originalURL, finalURL)
+    , m_ownerDocument(0)
     , m_embedded(false)
     , m_processed(false) // Child sheets get marked as processed when the libxslt engine has finally seen them.
     , m_stylesheetDoc(0)
     , m_stylesheetDocTaken(false)
     , m_parentStyleSheet(0)
 {
 }
 
 XSLStyleSheet::XSLStyleSheet(Node* parentNode, const String& originalURL, const KURL& finalURL,  bool embedded)
     : StyleSheet(parentNode, originalURL, finalURL)
+    , m_ownerDocument(parentNode->document())
     , m_embedded(embedded)
     , m_processed(true) // The root sheet starts off processed.
     , m_stylesheetDoc(0)
     , m_stylesheetDocTaken(false)
     , m_parentStyleSheet(0)
 {
 }
 
 XSLStyleSheet::~XSLStyleSheet()
 {
@@ skipping 41 matching lines @@
         if (rule->isImportRule()) {
             XSLImportRule* import = static_cast<XSLImportRule*>(rule);
             if (import->styleSheet())
                 import->styleSheet()->clearDocuments();
         }
     }
 }
 
 CachedResourceLoader* XSLStyleSheet::cachedResourceLoader()
 {
-    Document* document = ownerDocument();
-    if (!document)
+    if (!m_ownerDocument)
         return 0;
-    return document->cachedResourceLoader();
+    return m_ownerDocument->cachedResourceLoader();
 }
 
 bool XSLStyleSheet::parseString(const String& string, bool)
 {
     // Parse in a single chunk into an xmlDocPtr
     const UChar BOM = 0xFEFF;
     const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&BOM);
     if (!m_stylesheetDocTaken)
         xmlFreeDoc(m_stylesheetDoc);
     m_stylesheetDocTaken = false;
@@ skipping 105 matching lines @@
     ASSERT(!m_stylesheetDocTaken);
     xsltStylesheetPtr result = xsltParseStylesheetDoc(m_stylesheetDoc);
     if (result)
         m_stylesheetDocTaken = true;
     return result;
 }
 
 void XSLStyleSheet::setParentStyleSheet(XSLStyleSheet* parent)
 {
     m_parentStyleSheet = parent;
-}
-
-Document* XSLStyleSheet::ownerDocument()
-{
-    for (XSLStyleSheet* styleSheet = this; styleSheet; styleSheet = styleSheet->parentStyleSheet()) {
-        Node* node = styleSheet->ownerNode();
-        if (node)
-            return node->document();
-    }
-    return 0;
+    if (parent)
+        m_ownerDocument = parent->ownerDocument();
 }
 
 xmlDocPtr XSLStyleSheet::locateStylesheetSubResource(xmlDocPtr parentDoc, const xmlChar* uri)
 {
     bool matchedParent = (parentDoc == document());
     unsigned len = length();
     for (unsigned i = 0; i < len; ++i) {
         StyleBase* rule = item(i);
         if (rule->isImportRule()) {
             XSLImportRule* import = static_cast<XSLImportRule*>(rule);
@@ skipping 33 matching lines @@
 {
     ASSERT(!m_processed);
     ASSERT(!m_stylesheetDocTaken);
     m_processed = true;
     m_stylesheetDocTaken = true;
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(XSLT)