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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.
#ifndef CHROME_RENDERER_PRERENDER_PRERENDER_DISPATCHER_H_
#define CHROME_RENDERER_PRERENDER_PRERENDER_DISPATCHER_H_
#include <map>
#include <memory>
#include <set>
#include <vector>
#include "base/compiler_specific.h"
#include "content/public/renderer/render_thread_observer.h"
#include "third_party/WebKit/public/platform/WebPrerender.h"
#include "third_party/WebKit/public/platform/WebPrerenderingSupport.h"
class GURL;
namespace prerender {
// There is one PrerenderDispatcher per render process. It keeps track of which
// prerenders were launched from this renderer, and ensures prerender navigation
// is triggered on navigation to those. It implements the prerendering interface
// supplied to WebKit.
class PrerenderDispatcher : public content::RenderThreadObserver,
public blink::WebPrerenderingSupport {
public:
PrerenderDispatcher();
~PrerenderDispatcher() override;
bool IsPrerenderURL(const GURL& url) const;
private:
friend class PrerenderDispatcherTest;
// Message handlers for messages from the browser process.
void OnPrerenderStart(int prerender_id);
void OnPrerenderStopLoading(int prerender_id);
void OnPrerenderDomContentLoaded(int prerender_id);
void OnPrerenderAddAlias(const GURL& alias);
void OnPrerenderRemoveAliases(const std::vector<GURL>& aliases);
void OnPrerenderStop(int prerender_id);
// From RenderThreadObserver:
bool OnControlMessageReceived(const IPC::Message& message) override;
void OnRenderProcessShutdown() override;
// From WebPrerenderingSupport:
void Add(const blink::WebPrerender& prerender) override;
void Cancel(const blink::WebPrerender& prerender) override;
void Abandon(const blink::WebPrerender& prerender) override;
void PrefetchFinished() override;
// From WebKit, prerender elements launched by renderers in our process.
std::map<int, blink::WebPrerender> prerenders_;
// From the browser process, which prerenders are running, indexed by URL.
// Updated by the browser processes as aliases are discovered.
std::multiset<GURL> running_prerender_urls_;
};
} // namespace prerender
#endif // CHROME_RENDERER_PRERENDER_PRERENDER_DISPATCHER_H_