/*

 * 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

 * 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.

 *

 */

#ifndef ScriptElement_h

#define ScriptElement_h

#include "CachedResourceClient.h"

#include "CachedResourceHandle.h"

namespace WebCore {

class CachedScript;

class Element;

class ScriptElementData;

class ScriptSourceCode;

class ScriptElement {

public:

    ScriptElement() { }

    virtual ~ScriptElement() { }

    virtual String scriptContent() const = 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 void dispatchLoadEvent() = 0;

    virtual void dispatchErrorEvent() = 0;

    // A charset for loading the script (may be overridden by HTTP headers or a BOM).

    virtual String scriptCharset() const = 0;

    virtual bool shouldExecuteAsJavaScript() const = 0;

protected:

    // Helper functions used by our parent classes.

    static void insertedIntoDocument(ScriptElementData&, const String& sourceUrl);

    static void removedFromDocument(ScriptElementData&);

    static void childrenChanged(ScriptElementData&);

    static void finishParsingChildren(ScriptElementData&, const String& sourceUrl);

    static void handleSourceAttribute(ScriptElementData&, const String& sourceUrl);

};

// HTML/SVGScriptElement hold this struct as member variable

// and pass it to the static helper functions in ScriptElement

class ScriptElementData : private CachedResourceClient {

public:

    ScriptElementData(ScriptElement*, Element*);

    virtual ~ScriptElementData();

    bool ignoresLoadRequest() const;

    bool shouldExecuteAsJavaScript() const;

    String scriptContent() const;

    String scriptCharset() const;

    bool isAsynchronous() const;

    bool isDeferred() const;

    Element* element() const { return m_element; }

    bool createdByParser() const { return m_createdByParser; }

    void setCreatedByParser(bool value) { m_createdByParser = value; }

    bool haveFiredLoadEvent() const { return m_firedLoad; }

    void setHaveFiredLoadEvent(bool firedLoad) { m_firedLoad = firedLoad; }

    void requestScript(const String& sourceUrl);

    void evaluateScript(const ScriptSourceCode&);

    void stopLoadRequest();

    void execute(CachedScript*);

private:

    virtual void notifyFinished(CachedResource*);

private:

    ScriptElement* m_scriptElement;

    Element* m_element;

    CachedResourceHandle<CachedScript> m_cachedScript;

    bool m_createdByParser; // HTML5: "parser-inserted"

    bool m_requested;

    bool m_evaluated; // HTML5: "already started"

    bool m_firedLoad;

};

ScriptElement* toScriptElement(Element*);

}

#endif