src/chrome/browser/prerender/prerender_tab_helper.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_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_
   6 #define CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "base/time/time.h"
  11 #include "content/public/browser/web_contents_observer.h"
  12 #include "content/public/browser/web_contents_user_data.h"
  13 #include "url/gurl.h"
  14
  15 class PasswordManager;
  16
  17 namespace autofill {
  18 struct PasswordForm;
  19 }
  20
  21 namespace predictors {
  22 class LoggedInPredictorTable;
  23 }
  24
  25 namespace prerender {
  26
  27 class PrerenderManager;
  28
  29 // PrerenderTabHelper is responsible for recording perceived pageload times
  30 // to compare PLT's with prerendering enabled and disabled.
  31 class PrerenderTabHelper
  32     : public content::WebContentsObserver,
  33       public content::WebContentsUserData<PrerenderTabHelper> {
  34  public:
  35   enum Event {
  36     EVENT_LOGGED_IN_TABLE_REQUESTED = 0,
  37     EVENT_LOGGED_IN_TABLE_PRESENT = 1,
  38     EVENT_MAINFRAME_CHANGE = 2,
  39     EVENT_MAINFRAME_CHANGE_DOMAIN_LOGGED_IN = 3,
  40     EVENT_MAINFRAME_COMMIT = 4,
  41     EVENT_MAINFRAME_COMMIT_DOMAIN_LOGGED_IN = 5,
  42     EVENT_LOGIN_ACTION_ADDED = 6,
  43     EVENT_LOGIN_ACTION_ADDED_PW_EMPTY = 7,
  44     EVENT_MAX_VALUE
  45   };
  46
  47   static void CreateForWebContentsWithPasswordManager(
  48       content::WebContents* web_contents,
  49       PasswordManager* password_manager);
  50
  51   virtual ~PrerenderTabHelper();
  52
  53   // content::WebContentsObserver implementation.
  54   virtual void ProvisionalChangeToMainFrameUrl(
  55       const GURL& url,
  56       content::RenderViewHost* render_view_host) OVERRIDE;
  57   virtual void DidStopLoading(
  58       content::RenderViewHost* render_view_host) OVERRIDE;
  59   virtual void DidStartProvisionalLoadForFrame(
  60       int64 frame_id,
  61       int64 parent_frame_id,
  62       bool is_main_frame,
  63       const GURL& validated_url,
  64       bool is_error_page,
  65       bool is_iframe_srcdoc,
  66       content::RenderViewHost* render_view_host) OVERRIDE;
  67   virtual void DidCommitProvisionalLoadForFrame(
  68       int64 frame_id,
  69       const string16& frame_unique_name,
  70       bool is_main_frame,
  71       const GURL& validated_url,
  72       content::PageTransition transition_type,
  73       content::RenderViewHost* render_view_host) OVERRIDE;
  74
  75   // Called when a password form has been submitted.
  76   void PasswordSubmitted(const autofill::PasswordForm& form);
  77
  78   // Called when this prerendered WebContents has just been swapped in.
  79   void PrerenderSwappedIn();
  80
  81  private:
  82   PrerenderTabHelper(content::WebContents* web_contents,
  83                      PasswordManager* password_manager);
  84   friend class content::WebContentsUserData<PrerenderTabHelper>;
  85
  86   void RecordEvent(Event event) const;
  87   void RecordEventIfLoggedInURL(Event event, const GURL& url);
  88   void RecordEventIfLoggedInURLResult(Event event, scoped_ptr<bool> is_present,
  89                                       scoped_ptr<bool> lookup_succeeded);
  90   // Helper class to compute pixel-based stats on the paint progress
  91   // between when a prerendered page is swapped in and when the onload event
  92   // fires.
  93   class PixelStats;
  94   scoped_ptr<PixelStats> pixel_stats_;
  95
  96   // Retrieves the PrerenderManager, or NULL, if none was found.
  97   PrerenderManager* MaybeGetPrerenderManager() const;
  98
  99   // Returns whether the WebContents being observed is currently prerendering.
 100   bool IsPrerendering();
 101
 102   // Returns whether the WebContents being observed was prerendered.
 103   bool IsPrerendered();
 104
 105   // System time at which the current load was started for the purpose of
 106   // the perceived page load time (PPLT).
 107   base::TimeTicks pplt_load_start_;
 108
 109   // System time at which the actual pageload started (pre-swapin), if
 110   // a applicable (in cases when a prerender that was still loading was
 111   // swapped in).
 112   base::TimeTicks actual_load_start_;
 113
 114   // Current URL being loaded.
 115   GURL url_;
 116
 117   base::WeakPtrFactory<PrerenderTabHelper> weak_factory_;
 118
 119   DISALLOW_COPY_AND_ASSIGN(PrerenderTabHelper);
 120 };
 121
 122 }  // namespace prerender
 123
 124 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_