| // Copyright 2013 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_BROWSER_UI_WEBUI_NTP_NTP_USER_DATA_LOGGER_H_ |
| #define CHROME_BROWSER_UI_WEBUI_NTP_NTP_USER_DATA_LOGGER_H_ |
| |
| #include "chrome/common/ntp_logging_events.h" |
| #include "content/public/browser/web_contents_observer.h" |
| #include "content/public/browser/web_contents_user_data.h" |
| |
| namespace content { |
| class WebContents; |
| } |
| |
| // Helper class for logging data from the NTP. Attached to each NTP instance. |
| class NTPUserDataLogger |
| : public content::WebContentsObserver, |
| public content::WebContentsUserData<NTPUserDataLogger> { |
| public: |
| virtual ~NTPUserDataLogger(); |
| |
| static NTPUserDataLogger* GetOrCreateFromWebContents( |
| content::WebContents* content); |
| |
| // Logs the error percentage rate when loading thumbnail images for this NTP |
| // session to UMA histogram. Called when the user navigates to a URL. Only |
| // called for the instant NTP. |
| void EmitThumbnailErrorRate(); |
| |
| // Logs a number of statistics regarding the NTP. Called when an NTP tab is |
| // about to be deactivated (be it by switching tabs, losing focus or closing |
| // the tab/shutting down Chrome), or when the user navigates to a URL. |
| void EmitNtpStatistics(); |
| |
| // Called each time an event occurs on the NTP that requires a counter to be |
| // incremented. |
| void LogEvent(NTPLoggingEventType event); |
| |
| // content::WebContentsObserver override |
| virtual void NavigationEntryCommitted( |
| const content::LoadCommittedDetails& load_details) OVERRIDE; |
| |
| protected: |
| explicit NTPUserDataLogger(content::WebContents* contents); |
| |
| // Returns the percent error given |events| occurrences and |errors| errors. |
| virtual size_t GetPercentError(size_t errors, size_t events) const; |
| |
| private: |
| friend class content::WebContentsUserData<NTPUserDataLogger>; |
| |
| // Total number of mouseovers for this NTP session. |
| size_t number_of_mouseovers_; |
| |
| // Total number of attempts made to load thumbnail images for this NTP |
| // session. |
| size_t number_of_thumbnail_attempts_; |
| |
| // Total number of errors that occurred when trying to load thumbnail images |
| // for this NTP session. When these errors occur a grey tile is shown instead |
| // of a thumbnail image. |
| size_t number_of_thumbnail_errors_; |
| |
| // Total number of attempts made to load thumbnail images while providing a |
| // fallback thumbnail for this NTP session. |
| size_t number_of_fallback_thumbnails_requested_; |
| |
| // Total number of errors that occurred while trying to load the primary |
| // thumbnail image and that caused a fallback to the secondary thumbnail. |
| size_t number_of_fallback_thumbnails_used_; |
| |
| // Total number of tiles for which the visual appearance is handled externally |
| // by the page itself. |
| size_t number_of_external_tiles_; |
| |
| // True if at least one iframe came from a server-side suggestion. In |
| // practice, either all the iframes are server-side suggestions or none are. |
| bool server_side_suggestions_; |
| |
| // The URL of this New Tab Page - varies based on NTP version. |
| GURL ntp_url_; |
| |
| DISALLOW_COPY_AND_ASSIGN(NTPUserDataLogger); |
| }; |
| |
| #endif // CHROME_BROWSER_UI_WEBUI_NTP_NTP_USER_DATA_LOGGER_H_ |