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