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/*
* Copyright (C) 2013 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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 "core/loader/PrerenderHandle.h"
#include "core/dom/Document.h"
#include "core/frame/LocalFrame.h"
#include "core/loader/FrameLoader.h"
#include "core/loader/PrerendererClient.h"
#include "platform/Prerender.h"
#include "platform/weborigin/ReferrerPolicy.h"
#include "platform/weborigin/SecurityPolicy.h"
namespace blink {
// static
PassOwnPtrWillBeRawPtr<PrerenderHandle> PrerenderHandle::create(Document& document, PrerenderClient* client, const KURL& url, const unsigned prerenderRelTypes)
{
// Prerenders are unlike requests in most ways (for instance, they pass down fragments, and they don't return data),
// but they do have referrers.
if (!document.frame())
return nullptr;
RefPtr<Prerender> prerender = Prerender::create(client, url, prerenderRelTypes, SecurityPolicy::generateReferrer(document.referrerPolicy(), url, document.outgoingReferrer()));
PrerendererClient* prerendererClient = PrerendererClient::from(document.page());
if (prerendererClient)
prerendererClient->willAddPrerender(prerender.get());
prerender->add();
return adoptPtrWillBeNoop(new PrerenderHandle(document, prerender.release()));
}
PrerenderHandle::PrerenderHandle(Document& document, PassRefPtr<Prerender> prerender)
: DocumentLifecycleObserver(&document)
, m_prerender(prerender)
{
}
PrerenderHandle::~PrerenderHandle()
{
if (m_prerender)
detach();
}
void PrerenderHandle::cancel()
{
// Avoid both abandoning and canceling the same prerender. In the abandon case, the LinkLoader cancels the
// PrerenderHandle as the Document is destroyed, even through the DocumentLifecycleObserver has already abandoned
// it.
if (!m_prerender)
return;
m_prerender->cancel();
detach();
}
const KURL& PrerenderHandle::url() const
{
return m_prerender->url();
}
void PrerenderHandle::documentWasDetached()
{
#if ENABLE(OILPAN)
// In Oilpan, a PrerenderHandle is not removed from
// LifecycleNotifier::m_observers until a next GC is triggered.
// Thus documentWasDetached() can be called for a PrerenderHandle
// that is already canceled (and thus detached). In that case,
// we should not detach the PrerenderHandle again, so we need this check.
if (!m_prerender)
return;
#else
ASSERT(m_prerender);
#endif
m_prerender->abandon();
detach();
}
void PrerenderHandle::detach()
{
m_prerender->removeClient();
m_prerender.clear();
}
DEFINE_TRACE(PrerenderHandle)
{
DocumentLifecycleObserver::trace(visitor);
}
}