chrome/renderer/prerender/prerender_dispatcher.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_RENDERER_PRERENDER_PRERENDER_DISPATCHER_H_
   6 #define CHROME_RENDERER_PRERENDER_PRERENDER_DISPATCHER_H_
   7
   8 #include <map>
   9 #include <set>
  10 #include <vector>
  11
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "content/public/renderer/render_process_observer.h"
  15 #include "third_party/WebKit/public/platform/WebPrerender.h"
  16 #include "third_party/WebKit/public/platform/WebPrerenderingSupport.h"
  17
  18 class GURL;
  19
  20 namespace prerender {
  21
  22 // There is one PrerenderDispatcher per render process. It keeps track of which
  23 // prerenders were launched from this renderer, and ensures prerender navigation
  24 // is triggered on navigation to those. It implements the prerendering interface
  25 // supplied to WebKit.
  26 class PrerenderDispatcher : public content::RenderProcessObserver,
  27                             public blink::WebPrerenderingSupport {
  28  public:
  29   PrerenderDispatcher();
  30   ~PrerenderDispatcher() override;
  31
  32   bool IsPrerenderURL(const GURL& url) const;
  33
  34  private:
  35   friend class PrerenderDispatcherTest;
  36
  37   // Message handlers for messages from the browser process.
  38   void OnPrerenderStart(int prerender_id);
  39   void OnPrerenderStopLoading(int prerender_id);
  40   void OnPrerenderDomContentLoaded(int prerender_id);
  41   void OnPrerenderAddAlias(const GURL& alias);
  42   void OnPrerenderRemoveAliases(const std::vector<GURL>& aliases);
  43   void OnPrerenderStop(int prerender_id);
  44
  45   // From RenderProcessObserver:
  46   bool OnControlMessageReceived(const IPC::Message& message) override;
  47
  48   // From WebPrerenderingSupport:
  49   void add(const blink::WebPrerender& prerender) override;
  50   void cancel(const blink::WebPrerender& prerender) override;
  51   void abandon(const blink::WebPrerender& prerender) override;
  52
  53   // From WebKit, prerender elements launched by renderers in our process.
  54   std::map<int, blink::WebPrerender> prerenders_;
  55
  56   // From the browser process, which prerenders are running, indexed by URL.
  57   // Updated by the browser processes as aliases are discovered.
  58   std::multiset<GURL> running_prerender_urls_;
  59 };
  60
  61 }  // namespace prerender
  62
  63 #endif  // CHROME_RENDERER_PRERENDER_PRERENDER_DISPATCHER_H_