DOMWindowExtension.cpp 3.97 KB
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/*
 * Copyright (C) 2012 Apple Inc. All Rights Reserved.
 *
 * 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 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 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.
 */

#include "config.h"
#include "DOMWindowExtension.h"

#include "DOMWindow.h"
#include "DOMWrapperWorld.h"
#include "Frame.h"
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#include "FrameLoader.h"
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#include "FrameLoaderClient.h"
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#include <wtf/Ref.h>
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namespace WebCore {

DOMWindowExtension::DOMWindowExtension(Frame* frame, DOMWrapperWorld* world)
    : DOMWindowProperty(frame)
    , m_world(world)
    , m_wasDetached(false)
{
    ASSERT(this->frame());
    ASSERT(m_world);
}

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void DOMWindowExtension::disconnectFrameForPageCache()
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{
    // Calling out to the client might result in this DOMWindowExtension being destroyed
    // while there is still work to do.
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    Ref<DOMWindowExtension> protect(*this);
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    Frame* frame = this->frame();
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    frame->loader().client().dispatchWillDisconnectDOMWindowExtensionFromGlobalObject(this);
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    m_disconnectedFrame = frame;
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    DOMWindowProperty::disconnectFrameForPageCache();
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}

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void DOMWindowExtension::reconnectFrameFromPageCache(Frame* frame)
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{
    ASSERT(m_disconnectedFrame == frame);
    
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    DOMWindowProperty::reconnectFrameFromPageCache(frame);
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    m_disconnectedFrame = 0;

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    this->frame()->loader().client().dispatchDidReconnectDOMWindowExtensionToGlobalObject(this);
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}

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void DOMWindowExtension::willDestroyGlobalObjectInCachedFrame()
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{
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    ASSERT(m_disconnectedFrame);

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    // Calling out to the client might result in this DOMWindowExtension being destroyed
    // while there is still work to do.
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    Ref<DOMWindowExtension> protect(*this);

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    m_disconnectedFrame->loader().client().dispatchWillDestroyGlobalObjectForDOMWindowExtension(this);
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    m_disconnectedFrame = 0;
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    DOMWindowProperty::willDestroyGlobalObjectInCachedFrame();
}
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void DOMWindowExtension::willDestroyGlobalObjectInFrame()
{
    ASSERT(!m_disconnectedFrame);

    // Calling out to the client might result in this DOMWindowExtension being destroyed
    // while there is still work to do.
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    Ref<DOMWindowExtension> protect(*this);
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    if (!m_wasDetached) {
        Frame* frame = this->frame();
        ASSERT(frame);
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        frame->loader().client().dispatchWillDestroyGlobalObjectForDOMWindowExtension(this);
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    }

    DOMWindowProperty::willDestroyGlobalObjectInFrame();
}

void DOMWindowExtension::willDetachGlobalObjectFromFrame()
{
    ASSERT(!m_disconnectedFrame);
    ASSERT(!m_wasDetached);

    // Calling out to the client might result in this DOMWindowExtension being destroyed
    // while there is still work to do.
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    Ref<DOMWindowExtension> protect(*this);
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    Frame* frame = this->frame();
    ASSERT(frame);
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    frame->loader().client().dispatchWillDestroyGlobalObjectForDOMWindowExtension(this);
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    m_wasDetached = true;
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    DOMWindowProperty::willDetachGlobalObjectFromFrame();
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}

} // namespace WebCore