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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 "third_party/blink/renderer/core/loader/private/prerender_handle.h"
#include "services/network/public/mojom/referrer_policy.mojom-shared.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/loader/frame_loader.h"
#include "third_party/blink/renderer/core/loader/prerenderer_client.h"
#include "third_party/blink/renderer/platform/prerender.h"
#include "third_party/blink/renderer/platform/weborigin/security_policy.h"
namespace blink {
// static
PrerenderHandle* PrerenderHandle::Create(Document& document,
PrerenderClient* client,
const KURL& url,
const unsigned prerender_rel_types) {
// 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.GetFrame())
return nullptr;
Prerender* prerender = Prerender::Create(
client, url, prerender_rel_types,
SecurityPolicy::GenerateReferrer(document.GetReferrerPolicy(), url,
document.OutgoingReferrer()));
PrerendererClient* prerenderer_client =
PrerendererClient::From(document.GetPage());
if (prerenderer_client)
prerenderer_client->WillAddPrerender(prerender);
prerender->Add();
return new PrerenderHandle(document, prerender);
}
PrerenderHandle::PrerenderHandle(Document& document, Prerender* prerender)
: ContextLifecycleObserver(&document), prerender_(prerender) {}
PrerenderHandle::~PrerenderHandle() {
if (prerender_) {
prerender_->Abandon();
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 ContextLifecycleObserver has already abandoned
// it.
if (!prerender_)
return;
prerender_->Cancel();
Detach();
}
const KURL& PrerenderHandle::Url() const {
return prerender_->Url();
}
void PrerenderHandle::ContextDestroyed(ExecutionContext*) {
// A PrerenderHandle is not removed from LifecycleNotifier::m_observers until
// the next GC runs. Thus contextDestroyed() can be called for a
// PrerenderHandle that is already cancelled (and thus detached). In that
// case, we should not detach the PrerenderHandle again.
if (!prerender_)
return;
prerender_->Abandon();
Detach();
}
void PrerenderHandle::Detach() {
prerender_->Dispose();
prerender_.Clear();
}
void PrerenderHandle::Trace(blink::Visitor* visitor) {
visitor->Trace(prerender_);
ContextLifecycleObserver::Trace(visitor);
}
} // namespace blink