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 * in the documentation and/or other materials provided with the

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 * this software without specific prior written permission.

 * 

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 */

#ifndef ScriptStringImpl_h

#define ScriptStringImpl_h

#include "OwnHandle.h"

#include "PlatformString.h"

#include <v8.h>

namespace WebCore {

// This class is used for strings that tend to be shared with JavaScript frequently.  The JSC implementation uses wtf::UString - see bindings/js/ScriptString.h

// Currently XMLHttpRequest uses a ScriptString to build up the responseText attribute.  As data arrives from the network, it is appended to the ScriptString

// via operator+= and a JavaScript readystatechange event is fired.  JavaScript can access the responseText attribute of the XMLHttpRequest object.  JavaScript

// may also query the responseXML attribute of the XMLHttpRequest object which results in the responseText attribute being coerced into a WebCore::String and

// then parsed as an XML document.

// This implementation optimizes for the common case where the responseText is built up with many calls to operator+= before the actual text is queried.

class ScriptStringImpl : public RefCounted<ScriptStringImpl> {

public:

    static PassRefPtr<ScriptStringImpl> create(const String& s)

    {

        return adoptRef(new ScriptStringImpl(s));

    }

    static PassRefPtr<ScriptStringImpl> create(const char* s)

    {

        return adoptRef(new ScriptStringImpl(s));

    }

    String toString() const;

    bool isNull() const;

    size_t size() const;

    void append(const String& s);

    v8::Handle<v8::String> v8StringHandle() { return m_handle.get(); }

private:

    ScriptStringImpl(const String& s);

    ScriptStringImpl(const char* s);

    OwnHandle<v8::String> m_handle;

};

} // namespace WebCore

#endif // ScriptStringImpl_h