Refactoring: Decouple ScriptElement from HTMLScriptElement and SVGScriptElement.

Source/core/dom/ScriptElement.h

 /*
  * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * 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
@@ skipping 16 matching lines @@
 #include <wtf/text/WTFString.h>
 
 namespace WebCore {
 
 class CachedScript;
 class ContainerNode;
 class Element;
 class ScriptElement;
 class ScriptSourceCode;
 
+class ScriptElementClient {
+public:
+    virtual ~ScriptElementClient() { }
+
+    virtual void dispatchLoadEvent() = 0;
+
+    virtual String sourceAttributeValue() const = 0;
+    virtual String charsetAttributeValue() const = 0;
+    virtual String typeAttributeValue() const = 0;
+    virtual String languageAttributeValue() const = 0;
+    virtual String forAttributeValue() const = 0;
+    virtual String eventAttributeValue() const = 0;
+    virtual bool asyncAttributeValue() const = 0;
+    virtual bool deferAttributeValue() const = 0;
+    virtual bool hasSourceAttribute() const = 0;
+};
+
 class ScriptElement : private CachedResourceClient {
 public:
-    ScriptElement(Element*, bool createdByParser, bool isEvaluated);
+    static PassOwnPtr<ScriptElement> create(Element*, bool createdByParser, bool isEvaluated);
     virtual ~ScriptElement();
 
     Element* element() const { return m_element; }
 
     enum LegacyTypeSupport { DisallowLegacyTypeInTypeAttribute, AllowLegacyTypeInTypeAttribute };
     bool prepareScript(const TextPosition& scriptStartPosition = TextPosition::minimumPosition(), LegacyTypeSupport = DisallowLegacyTypeInTypeAttribute);
 
     String scriptCharset() const { return m_characterEncoding; }
     String scriptContent() const;
     void executeScript(const ScriptSourceCode&);
     void execute(CachedScript*);
 
     // XML parser calls these
-    virtual void dispatchLoadEvent() = 0;
+    void dispatchLoadEvent();
     void dispatchErrorEvent();
     bool isScriptTypeSupported(LegacyTypeSupport) const;
 
     bool haveFiredLoadEvent() const { return m_haveFiredLoad; }
     bool willBeParserExecuted() const { return m_willBeParserExecuted; }
     bool readyToBeParserExecuted() const { return m_readyToBeParserExecuted; }
     bool willExecuteWhenDocumentFinishedParsing() const { return m_willExecuteWhenDocumentFinishedParsing; }
     CachedResourceHandle<CachedScript> cachedScript() { return m_cachedScript; }
 
-protected:
     void setHaveFiredLoadEvent(bool haveFiredLoad) { m_haveFiredLoad = haveFiredLoad; }
     bool isParserInserted() const { return m_parserInserted; }
     bool alreadyStarted() const { return m_alreadyStarted; }
     bool forceAsync() const { return m_forceAsync; }
 
     // Helper functions used by our parent classes.
     void insertedInto(ContainerNode*);
     void childrenChanged();
     void handleSourceAttribute(const String& sourceUrl);
     void handleAsyncAttribute();
 
 private:
+    ScriptElement(Element*, bool createdByParser, bool isEvaluated);
+
     bool ignoresLoadRequest() const;
     bool isScriptForEventSupported() const;
 
     bool requestScript(const String& sourceUrl);
     void stopLoadRequest();
 
-    virtual void notifyFinished(CachedResource*);
+    ScriptElementClient* client() const;
 
-    virtual String sourceAttributeValue() const = 0;
-    virtual String charsetAttributeValue() const = 0;
-    virtual String typeAttributeValue() const = 0;
-    virtual String languageAttributeValue() const = 0;
-    virtual String forAttributeValue() const = 0;
-    virtual String eventAttributeValue() const = 0;
-    virtual bool asyncAttributeValue() const = 0;
-    virtual bool deferAttributeValue() const = 0;
-    virtual bool hasSourceAttribute() const = 0;
+    // CachedResourceClient
+    virtual void notifyFinished(CachedResource*) OVERRIDE;
 
     Element* m_element;
     CachedResourceHandle<CachedScript> m_cachedScript;
     WTF::OrdinalNumber m_startLineNumber;
     bool m_parserInserted : 1;
     bool m_isExternalScript : 1;
     bool m_alreadyStarted : 1;
     bool m_haveFiredLoad : 1;
     bool m_willBeParserExecuted : 1; // Same as "The parser will handle executing the script."
     bool m_readyToBeParserExecuted : 1;
     bool m_willExecuteWhenDocumentFinishedParsing : 1;
     bool m_forceAsync : 1;
     bool m_willExecuteInOrder : 1;
     String m_characterEncoding;
     String m_fallbackCharacterEncoding;
 };
 
 ScriptElement* toScriptElementIfPossible(Element*);
 
+inline PassOwnPtr<ScriptElement> ScriptElement::create(Element* element, bool createdByParser, bool isEvaluated)
+{
+    return adoptPtr(new ScriptElement(element, createdByParser, isEvaluated));
 }
 
+}
+
+
 #endif