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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/renderer/prerender/prerender_dispatcher.h"
#include "base/logging.h"
#include "chrome/common/prerender_messages.h"
#include "chrome/common/prerender_types.h"
#include "chrome/renderer/prerender/prerender_extra_data.h"
#include "content/public/common/referrer.h"
#include "content/public/renderer/render_thread.h"
#include "content/public/renderer/render_view.h"
#include "third_party/WebKit/public/platform/WebPrerenderingSupport.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/platform/WebURL.h"
#include "url/gurl.h"
namespace prerender {
using blink::WebPrerender;
using blink::WebPrerenderingSupport;
PrerenderDispatcher::PrerenderDispatcher() {
WebPrerenderingSupport::initialize(this);
}
PrerenderDispatcher::~PrerenderDispatcher() {
WebPrerenderingSupport::shutdown();
}
bool PrerenderDispatcher::IsPrerenderURL(const GURL& url) const {
return running_prerender_urls_.count(url) >= 1;
}
void PrerenderDispatcher::OnPrerenderStart(int prerender_id) {
std::map<int, WebPrerender>::iterator it = prerenders_.find(prerender_id);
if (it == prerenders_.end())
return;
WebPrerender& prerender = it->second;
// The prerender should only be null in unit tests.
if (prerender.isNull())
return;
prerender.didStartPrerender();
}
void PrerenderDispatcher::OnPrerenderStopLoading(int prerender_id) {
std::map<int, WebPrerender>::iterator it = prerenders_.find(prerender_id);
if (it == prerenders_.end())
return;
WebPrerender& prerender = it->second;
DCHECK(!prerender.isNull())
<< "OnPrerenderStopLoading shouldn't be called from a unit test, the only"
<< "context in which a WebPrerender in the dispatcher can be null.";
prerender.didSendLoadForPrerender();
}
void PrerenderDispatcher::OnPrerenderDomContentLoaded(int prerender_id) {
std::map<int, WebPrerender>::iterator it = prerenders_.find(prerender_id);
if (it == prerenders_.end())
return;
WebPrerender& prerender = it->second;
DCHECK(!prerender.isNull())
<< "OnPrerenderDomContentLoaded shouldn't be called from a unit test,"
<< " the only context in which a WebPrerender in the dispatcher can be"
<< " null.";
prerender.didSendDOMContentLoadedForPrerender();
}
void PrerenderDispatcher::OnPrerenderAddAlias(const GURL& alias) {
running_prerender_urls_.insert(alias);
}
void PrerenderDispatcher::OnPrerenderRemoveAliases(
const std::vector<GURL>& aliases) {
for (size_t i = 0; i < aliases.size(); ++i) {
std::multiset<GURL>::iterator it = running_prerender_urls_.find(aliases[i]);
if (it != running_prerender_urls_.end()) {
running_prerender_urls_.erase(it);
}
}
}
void PrerenderDispatcher::OnPrerenderStop(int prerender_id) {
std::map<int, WebPrerender>::iterator it = prerenders_.find(prerender_id);
if (it == prerenders_.end())
return;
WebPrerender& prerender = it->second;
// The prerender should only be null in unit tests.
if (!prerender.isNull())
prerender.didStopPrerender();
// TODO(cbentzel): We'd also want to send the map of active prerenders when
// creating a new render process, so the Add/Remove go relative to that.
// This may not be that big of a deal in practice, since the newly created tab
// is unlikely to go to the prerendered page.
prerenders_.erase(prerender_id);
}
bool PrerenderDispatcher::OnControlMessageReceived(
const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(PrerenderDispatcher, message)
IPC_MESSAGE_HANDLER(PrerenderMsg_OnPrerenderStart, OnPrerenderStart)
IPC_MESSAGE_HANDLER(PrerenderMsg_OnPrerenderStopLoading,
OnPrerenderStopLoading)
IPC_MESSAGE_HANDLER(PrerenderMsg_OnPrerenderDomContentLoaded,
OnPrerenderDomContentLoaded)
IPC_MESSAGE_HANDLER(PrerenderMsg_OnPrerenderAddAlias, OnPrerenderAddAlias)
IPC_MESSAGE_HANDLER(PrerenderMsg_OnPrerenderRemoveAliases,
OnPrerenderRemoveAliases)
IPC_MESSAGE_HANDLER(PrerenderMsg_OnPrerenderStop, OnPrerenderStop)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void PrerenderDispatcher::add(const WebPrerender& prerender) {
const PrerenderExtraData& extra_data =
PrerenderExtraData::FromPrerender(prerender);
if (prerenders_.count(extra_data.prerender_id()) != 0) {
// TODO(gavinp): Determine why these apparently duplicate adds occur.
return;
}
prerenders_[extra_data.prerender_id()] = prerender;
PrerenderAttributes attributes;
attributes.url = GURL(prerender.url());
attributes.rel_types = prerender.relTypes();
content::RenderThread::Get()->Send(new PrerenderHostMsg_AddLinkRelPrerender(
extra_data.prerender_id(), attributes,
content::Referrer(GURL(prerender.referrer()),
prerender.referrerPolicy()),
extra_data.size(), extra_data.render_view_route_id()));
}
void PrerenderDispatcher::cancel(const WebPrerender& prerender) {
const PrerenderExtraData& extra_data =
PrerenderExtraData::FromPrerender(prerender);
content::RenderThread::Get()->Send(
new PrerenderHostMsg_CancelLinkRelPrerender(extra_data.prerender_id()));
// The browser will not send an OnPrerenderStop (the prerender may have even
// been canceled before it was started), so release it to avoid a
// leak. Moreover, if it did, the PrerenderClient in Blink will have been
// detached already.
prerenders_.erase(extra_data.prerender_id());
}
void PrerenderDispatcher::abandon(const WebPrerender& prerender) {
const PrerenderExtraData& extra_data =
PrerenderExtraData::FromPrerender(prerender);
content::RenderThread::Get()->Send(
new PrerenderHostMsg_AbandonLinkRelPrerender(extra_data.prerender_id()));
// The browser will not send an OnPrerenderStop (the prerender may have even
// been canceled before it was started), so release it to avoid a
// leak. Moreover, if it did, the PrerenderClient in Blink will have been
// detached already.
prerenders_.erase(extra_data.prerender_id());
}
} // namespace prerender
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