blob: 46759133b24263da2a0e2f3f5a78a8c10eec12fb [file] [log] [blame]
/*
* 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 "Document.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include <wtf/Ref.h>
namespace WebCore {
DOMWindowExtension::DOMWindowExtension(DOMWindow* window, DOMWrapperWorld& world)
: m_window(window)
, m_world(world)
, m_wasDetached(false)
{
ASSERT(this->frame());
if (m_window)
m_window->registerObserver(*this);
}
DOMWindowExtension::~DOMWindowExtension()
{
if (m_window)
m_window->unregisterObserver(*this);
}
Frame* DOMWindowExtension::frame() const
{
return m_window ? m_window->frame() : nullptr;
}
void DOMWindowExtension::suspendForBackForwardCache()
{
// Calling out to the client might result in this DOMWindowExtension being destroyed
// while there is still work to do.
Ref<DOMWindowExtension> protectedThis(*this);
Ref frame = *this->frame();
frame->loader().client().dispatchWillDisconnectDOMWindowExtensionFromGlobalObject(this);
m_disconnectedFrame = WTFMove(frame);
}
void DOMWindowExtension::resumeFromBackForwardCache()
{
ASSERT(frame());
ASSERT(m_disconnectedFrame == frame());
ASSERT(frame()->document()->domWindow() == m_window);
m_disconnectedFrame = nullptr;
frame()->loader().client().dispatchDidReconnectDOMWindowExtensionToGlobalObject(this);
}
void DOMWindowExtension::willDestroyGlobalObjectInCachedFrame()
{
ASSERT(m_disconnectedFrame); // Somehow m_disconnectedFrame can be null here. See <rdar://problem/49613448>.
// Calling out to the client might result in this DOMWindowExtension being destroyed
// while there is still work to do.
Ref<DOMWindowExtension> protectedThis(*this);
if (m_disconnectedFrame)
m_disconnectedFrame->loader().client().dispatchWillDestroyGlobalObjectForDOMWindowExtension(this);
m_disconnectedFrame = nullptr;
// DOMWindowExtension lifetime isn't tied directly to the DOMWindow itself so it is important that it unregister
// itself from any DOMWindow it is associated with if that DOMWindow is going away.
ASSERT(m_window);
if (m_window)
m_window->unregisterObserver(*this);
m_window = nullptr;
}
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.
Ref<DOMWindowExtension> protectedThis(*this);
if (!m_wasDetached) {
Frame* frame = this->frame();
ASSERT(frame);
frame->loader().client().dispatchWillDestroyGlobalObjectForDOMWindowExtension(this);
}
// DOMWindowExtension lifetime isn't tied directly to the DOMWindow itself so it is important that it unregister
// itself from any DOMWindow it is associated with if that DOMWindow is going away.
ASSERT(m_window);
if (m_window)
m_window->unregisterObserver(*this);
m_window = nullptr;
}
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.
Ref<DOMWindowExtension> protectedThis(*this);
Frame* frame = this->frame();
ASSERT(frame);
frame->loader().client().dispatchWillDestroyGlobalObjectForDOMWindowExtension(this);
m_wasDetached = true;
}
} // namespace WebCore