Merge 76728

Source/WebCore/css/CSSStyleSheet.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007 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,
@@ skipping 35 matching lines @@
         || parentNode->hasTagName(HTMLNames::styleTag)
 #if ENABLE(SVG)
         || parentNode->hasTagName(SVGNames::styleTag)
 #endif    
         || parentNode->nodeType() == Node::PROCESSING_INSTRUCTION_NODE;
 }
 #endif
 
 CSSStyleSheet::CSSStyleSheet(CSSStyleSheet* parentSheet, const String& href, const KURL& baseURL, const String& charset)
     : StyleSheet(parentSheet, href, baseURL)
-    , m_document(parentSheet ? parentSheet->document() : 0)
     , m_charset(charset)
     , m_loadCompleted(false)
     , m_strictParsing(!parentSheet || parentSheet->useStrictParsing())
     , m_isUserStyleSheet(parentSheet ? parentSheet->isUserStyleSheet() : false)
     , m_hasSyntacticallyValidCSSHeader(true)
 {
 }
 
 CSSStyleSheet::CSSStyleSheet(Node* parentNode, const String& href, const KURL& baseURL, const String& charset)
     : StyleSheet(parentNode, href, baseURL)
-    , m_document(parentNode->document())
     , m_charset(charset)
     , m_loadCompleted(false)
     , m_strictParsing(false)
     , m_isUserStyleSheet(false)
     , m_hasSyntacticallyValidCSSHeader(true)
 {
     ASSERT(isAcceptableCSSStyleSheetParent(parentNode));
 }
 
 CSSStyleSheet::CSSStyleSheet(CSSRule* ownerRule, const String& href, const KURL& baseURL, const String& charset)
     : StyleSheet(ownerRule, href, baseURL)
     , m_charset(charset)
     , m_loadCompleted(false)
     , m_strictParsing(!ownerRule || ownerRule->useStrictParsing())
     , m_hasSyntacticallyValidCSSHeader(true)
 {
     CSSStyleSheet* parentSheet = ownerRule ? ownerRule->parentStyleSheet() : 0;
-    m_document = parentSheet ? parentSheet->document() : 0;
     m_isUserStyleSheet = parentSheet ? parentSheet->isUserStyleSheet() : false;
 }
 
 CSSStyleSheet::~CSSStyleSheet()
 {
 }
 
 CSSRule *CSSStyleSheet::ownerRule() const
 {
     return (parent() && parent()->isRule()) ? static_cast<CSSRule*>(parent()) : 0;
@@ skipping 130 matching lines @@
     if (parent())
         parent()->checkLoaded();
 
     // Avoid |this| being deleted by scripts that run via
     // ScriptableDocumentParser::executeScriptsWaitingForStylesheets().
     // See <rdar://problem/6622300>.
     RefPtr<CSSStyleSheet> protector(this);
     m_loadCompleted = ownerNode() ? ownerNode()->sheetLoaded() : true;
 }
 
+Document* CSSStyleSheet::document()
+{
+    StyleBase* styleObject = this;
+    while (styleObject) {
+        if (styleObject->isCSSStyleSheet()) {
+            Node* ownerNode = static_cast<CSSStyleSheet*>(styleObject)->ownerNode();
+            if (ownerNode)
+                return ownerNode->document();
+        }
+        if (styleObject->isRule())
+            styleObject = static_cast<CSSRule*>(styleObject)->parentStyleSheet();
+        else
+            styleObject = styleObject->parent();
+    }
+
+    return 0;
+}
+
 void CSSStyleSheet::styleSheetChanged()
 {
     StyleBase* root = this;
     while (StyleBase* parent = root->parent())
         root = parent;
     Document* documentToUpdate = root->isCSSStyleSheet() ? static_cast<CSSStyleSheet*>(root)->document() : 0;
     
     /* FIXME: We don't need to do everything updateStyleSelector does,
      * basically we just need to recreate the document's selector with the
      * already existing style sheets.
@@ skipping 30 matching lines @@
             if (rule->isImportRule()) {
                 if (CSSStyleSheet* ruleStyleSheet = static_cast<CSSImportRule*>(rule)->styleSheet())
                     styleSheetQueue.append(ruleStyleSheet);
             }
             rule->addSubresourceStyleURLs(urls);
         }
     }
 }
 
 }