jscallbackobject.h

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2007 Eric Seidel <[e-mail]>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#ifndef JSCallbackObject_h
#define JSCallbackObject_h

#include "JSObjectRef.h"
#include "JSValueRef.h"
#include "JSObject.h"

namespace JSC {

template <class Base>
class JSCallbackObject : public Base {
public:
    JSCallbackObject(ExecState*, PassRefPtr<Structure>, JSClassRef, void* data);
    JSCallbackObject(JSClassRef);
    virtual ~JSCallbackObject();

    void setPrivate(void* data);
    void* getPrivate();

    static const ClassInfo info;

    JSClassRef classRef() const { return m_callbackObjectData->jsClass; }
    bool inherits(JSClassRef) const;

    static PassRefPtr<Structure> createStructure(JSValuePtr proto) 
    { 
        return Structure::create(proto, TypeInfo(ObjectType, ImplementsHasInstance | OverridesHasInstance)); 
    }

private:
    virtual UString className() const;

    virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
    virtual bool getOwnPropertySlot(ExecState*, unsigned, PropertySlot&);
    
    virtual void put(ExecState*, const Identifier&, JSValuePtr, PutPropertySlot&);

    virtual bool deleteProperty(ExecState*, const Identifier&);
    virtual bool deleteProperty(ExecState*, unsigned);

    virtual bool hasInstance(ExecState* exec, JSValuePtr value, JSValuePtr proto);

    virtual void getPropertyNames(ExecState*, PropertyNameArray&);

    virtual double toNumber(ExecState*) const;
    virtual UString toString(ExecState*) const;

    virtual ConstructType getConstructData(ConstructData&);
    virtual CallType getCallData(CallData&);
    virtual const ClassInfo* classInfo() const { return &info; }

    void init(ExecState*);
 
    static JSCallbackObject* asCallbackObject(JSValuePtr);
 
    static JSValuePtr call(ExecState*, JSObject* functionObject, JSValuePtr thisValue, const ArgList&);
    static JSObject* construct(ExecState*, JSObject* constructor, const ArgList&);
   
    static JSValuePtr staticValueGetter(ExecState*, const Identifier&, const PropertySlot&);
    static JSValuePtr staticFunctionGetter(ExecState*, const Identifier&, const PropertySlot&);
    static JSValuePtr callbackGetter(ExecState*, const Identifier&, const PropertySlot&);

    struct JSCallbackObjectData {
        JSCallbackObjectData(void* privateData, JSClassRef jsClass)
            : privateData(privateData)
            , jsClass(jsClass)
        {
            JSClassRetain(jsClass);
        }
        
        ~JSCallbackObjectData()
        {
            JSClassRelease(jsClass);
        }
        
        void* privateData;
        JSClassRef jsClass;
    };
    
    OwnPtr<JSCallbackObjectData> m_callbackObjectData;
};

} // namespace JSC

// include the actual template class implementation
#include "JSCallbackObjectFunctions.h"

#endif // JSCallbackObject_h