pjs/js/ipc/ContextWrapperParent.h

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 * 1.1 (the "License"); you may not use this file except in compliance with
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 * The Original Code is mozilla.org code.
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 * The Initial Developer of the Original Code is
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 * Contributor(s):
 *   Ben Newman <b{enjam,newma}n@mozilla.com> (original author)
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#ifndef mozilla_jsipc_ContextWrapperParent_h__
#define mozilla_jsipc_ContextWrapperParent_h__

#include "mozilla/jsipc/PContextWrapperParent.h"
#include "mozilla/jsipc/ObjectWrapperParent.h"
#include "mozilla/jsipc/CPOWTypes.h"

#include "mozilla/dom/ContentParent.h"

#include "jsapi.h"
#include "nsAutoJSValHolder.h"

namespace mozilla {
namespace jsipc {

using mozilla::dom::ContentParent;
    
class ContextWrapperParent
    : public PContextWrapperParent
{
public:

    ContextWrapperParent(ContentParent* cpp)
        : mContent(cpp)
        , mGlobal(NULL)
    {}

    JSBool GetGlobalJSObject(JSContext* cx, JSObject** globalp) {
        if (!mGlobal)
            return JS_FALSE;
        mGlobalHolder.Hold(cx);
        mGlobalHolder = *globalp = mGlobal->GetJSObject(cx);
        return JS_TRUE;
    }

    ObjectWrapperParent* GetGlobalObjectWrapper() const {
        return mGlobal;
    }

    bool RequestRunToCompletion() {
        return mContent->RequestRunToCompletion();
    }

private:

    ContentParent* mContent;
    ObjectWrapperParent* mGlobal;
    nsAutoJSValHolder mGlobalHolder;

    PObjectWrapperParent* AllocPObjectWrapper(const bool&) {
        return new ObjectWrapperParent();
    }

    bool RecvPObjectWrapperConstructor(PObjectWrapperParent* actor,
                                       const bool& makeGlobal)
    {
        if (makeGlobal) {
            mGlobalHolder.Release();
            mGlobal = static_cast<ObjectWrapperParent*>(actor);
        }
        return true;
    }

    bool DeallocPObjectWrapper(PObjectWrapperParent* actor)
    {
        if (mGlobal &&
            mGlobal == static_cast<ObjectWrapperParent*>(actor)) {
            mGlobalHolder.Release();
            mGlobal = NULL;
        }
        delete actor;
        return true;
    }

};

}}

#endif