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 "chrome/browser/prerender/prerender_histograms.h"
  12 #include "chrome/browser/prerender/prerender_origin.h"
  13 #include "content/public/browser/web_contents_observer.h"
  14 #include "content/public/browser/web_contents_user_data.h"
  15 #include "url/gurl.h"
  16
  17 class PasswordManager;
  18
  19 namespace autofill {
  20 struct PasswordForm;
  21 }
  22
  23 namespace prerender {
  24
  25 class PrerenderManager;
  26
  27 // PrerenderTabHelper is responsible for recording perceived pageload times
  28 // to compare PLT's with prerendering enabled and disabled.
  29 class PrerenderTabHelper
  30     : public content::WebContentsObserver,
  31       public content::WebContentsUserData<PrerenderTabHelper> {
  32  public:
  33   enum Event {
  34     EVENT_LOGGED_IN_TABLE_REQUESTED = 0,
  35     EVENT_LOGGED_IN_TABLE_PRESENT = 1,
  36     EVENT_MAINFRAME_CHANGE = 2,
  37     EVENT_MAINFRAME_CHANGE_DOMAIN_LOGGED_IN = 3,
  38     EVENT_MAINFRAME_COMMIT = 4,
  39     EVENT_MAINFRAME_COMMIT_DOMAIN_LOGGED_IN = 5,
  40     EVENT_LOGIN_ACTION_ADDED = 6,
  41     EVENT_LOGIN_ACTION_ADDED_PW_EMPTY = 7,
  42     EVENT_MAX_VALUE
  43   };
  44
  45   static void CreateForWebContentsWithPasswordManager(
  46       content::WebContents* web_contents,
  47       PasswordManager* password_manager);
  48
  49   virtual ~PrerenderTabHelper();
  50
  51   // content::WebContentsObserver implementation.
  52   virtual void ProvisionalChangeToMainFrameUrl(
  53       const GURL& url,
  54       content::RenderFrameHost* render_frame_host) OVERRIDE;
  55   virtual void DidStopLoading(
  56       content::RenderViewHost* render_view_host) OVERRIDE;
  57   virtual void DidStartProvisionalLoadForFrame(
  58       int64 frame_id,
  59       int64 parent_frame_id,
  60       bool is_main_frame,
  61       const GURL& validated_url,
  62       bool is_error_page,
  63       bool is_iframe_srcdoc,
  64       content::RenderViewHost* render_view_host) OVERRIDE;
  65   virtual void DidCommitProvisionalLoadForFrame(
  66       int64 frame_id,
  67       const base::string16& frame_unique_name,
  68       bool is_main_frame,
  69       const GURL& validated_url,
  70       content::PageTransition transition_type,
  71       content::RenderViewHost* render_view_host) OVERRIDE;
  72
  73   // Called when a password form has been submitted.
  74   void PasswordSubmitted(const autofill::PasswordForm& form);
  75
  76   // Called when this prerendered WebContents has just been swapped in.
  77   void PrerenderSwappedIn();
  78
  79   // Called when a control prerender is resolved. Applies to the next load.
  80   void WouldHavePrerenderedNextLoad(Origin origin);
  81
  82  private:
  83   PrerenderTabHelper(content::WebContents* web_contents,
  84                      PasswordManager* password_manager);
  85   friend class content::WebContentsUserData<PrerenderTabHelper>;
  86
  87   void RecordEvent(Event event) const;
  88   void RecordEventIfLoggedInURL(Event event, const GURL& url);
  89   void RecordEventIfLoggedInURLResult(Event event, scoped_ptr<bool> is_present,
  90                                       scoped_ptr<bool> lookup_succeeded);
  91
  92   void RecordPerceivedPageLoadTime(
  93       base::TimeDelta perceived_page_load_time,
  94       double fraction_plt_elapsed_at_swap_in);
  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   // The type the current pending navigation, if there is one. If the tab is a
 103   // prerender before swap, the value is always NAVIGATION_TYPE_PRERENDERED,
 104   // even if the prerender is not currently loading.
 105   NavigationType navigation_type_;
 106
 107   // If |navigation_type_| is not NAVIGATION_TYPE_NORMAL, the origin of the
 108   // relevant prerender. Otherwise, ORIGIN_NONE.
 109   Origin origin_;
 110
 111   // True if the next load will be associated with a control prerender. This
 112   // extra state is needed because control prerenders are resolved before the
 113   // actual load begins. |next_load_origin_| gives the origin of the control
 114   // prerender.
 115   bool next_load_is_control_prerender_;
 116   Origin next_load_origin_;
 117
 118   // System time at which the current load was started for the purpose of
 119   // the perceived page load time (PPLT). If null, there is no current
 120   // load.
 121   base::TimeTicks pplt_load_start_;
 122
 123   // System time at which the actual pageload started (pre-swapin), if
 124   // a applicable (in cases when a prerender that was still loading was
 125   // swapped in).
 126   base::TimeTicks actual_load_start_;
 127
 128   // Current URL being loaded.
 129   GURL url_;
 130
 131   base::WeakPtrFactory<PrerenderTabHelper> weak_factory_;
 132
 133   DISALLOW_COPY_AND_ASSIGN(PrerenderTabHelper);
 134 };
 135
 136 }  // namespace prerender
 137
 138 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_