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      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_UI_WEBUI_PERFORMANCE_MONITOR_PERFORMANCE_MONITOR_HANDLER_H_
      6 #define CHROME_BROWSER_UI_WEBUI_PERFORMANCE_MONITOR_PERFORMANCE_MONITOR_HANDLER_H_
      7 
      8 #include "base/compiler_specific.h"
      9 #include "base/memory/weak_ptr.h"
     10 #include "content/public/browser/web_ui_message_handler.h"
     11 
     12 namespace base {
     13 class ListValue;
     14 class Time;
     15 class Value;
     16 }  // namespace base
     17 
     18 namespace performance_monitor {
     19 
     20 // This class handles messages to and from the performance monitor page.
     21 // Incoming calls are handled by the Handle* functions and callbacks are made
     22 // from ReturnResults functions.
     23 class PerformanceMonitorHandler
     24     : public content::WebUIMessageHandler,
     25       public base::SupportsWeakPtr<PerformanceMonitorHandler> {
     26  public:
     27   PerformanceMonitorHandler();
     28 
     29  private:
     30   virtual ~PerformanceMonitorHandler();
     31 
     32   // WebUIMessageHandler implementation.
     33   virtual void RegisterMessages() OVERRIDE;
     34 
     35   // Returns |results| through the given |callback| string.
     36   void ReturnResults(const std::string& callback, const base::Value* results);
     37 
     38   // Callback for the "getActiveIntervals" message.
     39   // |args| contains a start and an end time.
     40   void HandleGetActiveIntervals(const base::ListValue* args);
     41 
     42   // Callback for the "getFlagEnabled" message.
     43   // |args| is unused.
     44   void HandleGetFlagEnabled(const base::ListValue* args);
     45 
     46   // Callback for the "getAggregationTypes" message.
     47   // |args| is unused.
     48   void HandleGetAggregationTypes(const base::ListValue* args);
     49 
     50   // Callback for the "getEventTypes" message.
     51   // |args| is unused.
     52   void HandleGetEventTypes(const base::ListValue* args);
     53 
     54   // Callback for the "getEvents" message.
     55   // |args| contains an EventType id to collect and a start and end time.
     56   void HandleGetEvents(const base::ListValue* args);
     57 
     58   // Callback for the "getMetricTypes" message.
     59   // |args| is unused.
     60   void HandleGetMetricTypes(const base::ListValue* args);
     61 
     62   // Callback for the "getMetrics" message.
     63   // |args| contains a list of MetricTypes to collect, a start and end time,
     64   // a time resolution (defining the spacing of metric samples returned),
     65   // and an aggregation method.
     66   void HandleGetMetrics(const base::ListValue* args);
     67 
     68   DISALLOW_COPY_AND_ASSIGN(PerformanceMonitorHandler);
     69 };
     70 
     71 }  // namespace performance_monitor
     72 
     73 #endif  // CHROME_BROWSER_UI_WEBUI_PERFORMANCE_MONITOR_PERFORMANCE_MONITOR_HANDLER_H_
     74