1 // Copyright (c) 2011 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_UI_WEBUI_METRICS_HANDLER_H_ 6 #define CHROME_BROWSER_UI_WEBUI_METRICS_HANDLER_H_ 7 8 #include "base/compiler_specific.h" 9 #include "content/public/browser/web_ui_message_handler.h" 10 11 /////////////////////////////////////////////////////////////////////////////// 12 // MetricsHandler 13 14 // Let the page contents record UMA actions. Only use when you can't do it from 15 // C++. For example, we currently use it to let the NTP log the position of the 16 // Most Visited or Bookmark the user clicked on, as we don't get that 17 // information through RequestOpenURL. You will need to update the metrics 18 // dashboard with the action names you use, as our processor won't catch that 19 // information (treat it as RecordComputedMetrics) 20 21 namespace base { 22 class ListValue; 23 } 24 25 class MetricsHandler : public content::WebUIMessageHandler { 26 public: 27 MetricsHandler(); 28 virtual ~MetricsHandler(); 29 30 // WebUIMessageHandler implementation. 31 virtual void RegisterMessages() OVERRIDE; 32 33 // Callback for the "metricsHandler:recordAction" message. This records a 34 // user action. 35 void HandleRecordAction(const base::ListValue* args); 36 37 // TODO(dbeam): http://crbug.com/104338 38 39 // Callback for the "metricsHandler:recordInHistogram" message. This records 40 // into a histogram. |args| contains the histogram name, the value to record, 41 // and the maximum allowed value, which can be at most 4000. The histogram 42 // will use at most 100 buckets, one for each 1, 10, or 100 different values, 43 // depending on the maximum value. 44 void HandleRecordInHistogram(const base::ListValue* args); 45 46 // Callback for the "metricsHandler:logEventTime" message. 47 void HandleLogEventTime(const base::ListValue* args); 48 49 // Used to log when a user mouses over a tile or title on the NTP. 50 void HandleLogMouseover(const base::ListValue* args); 51 52 private: 53 DISALLOW_COPY_AND_ASSIGN(MetricsHandler); 54 }; 55 56 #endif // CHROME_BROWSER_UI_WEBUI_METRICS_HANDLER_H_ 57
