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#include "chrome/browser/ui/webui/metrics_handler.h"
6
7#include "base/bind.h"
8#include "base/bind_helpers.h"
9#include "base/logging.h"
10#include "base/metrics/histogram.h"
11#include "base/strings/utf_string_conversions.h"
12#include "base/values.h"
13#include "chrome/browser/chrome_notification_types.h"
14#include "chrome/browser/metrics/metric_event_duration_details.h"
15#include "chrome/browser/ui/tab_contents/core_tab_helper.h"
16#include "chrome/browser/ui/webui/ntp/ntp_user_data_logger.h"
17#include "content/public/browser/notification_service.h"
18#include "content/public/browser/user_metrics.h"
19#include "content/public/browser/web_contents.h"
20#include "content/public/browser/web_ui.h"
21
22using base::ListValue;
23using content::UserMetricsAction;
24using content::WebContents;
25
26MetricsHandler::MetricsHandler() {}
27MetricsHandler::~MetricsHandler() {}
28
29void MetricsHandler::RegisterMessages() {
30  web_ui()->RegisterMessageCallback(
31      "metricsHandler:recordAction",
32      base::Bind(&MetricsHandler::HandleRecordAction, base::Unretained(this)));
33  web_ui()->RegisterMessageCallback(
34      "metricsHandler:recordInHistogram",
35      base::Bind(&MetricsHandler::HandleRecordInHistogram,
36                 base::Unretained(this)));
37  web_ui()->RegisterMessageCallback(
38      "metricsHandler:logEventTime",
39      base::Bind(&MetricsHandler::HandleLogEventTime, base::Unretained(this)));
40  web_ui()->RegisterMessageCallback(
41      "metricsHandler:logMouseover",
42      base::Bind(&MetricsHandler::HandleLogMouseover, base::Unretained(this)));
43}
44
45void MetricsHandler::HandleRecordAction(const ListValue* args) {
46  std::string string_action = UTF16ToUTF8(ExtractStringValue(args));
47  content::RecordComputedAction(string_action);
48}
49
50void MetricsHandler::HandleRecordInHistogram(const ListValue* args) {
51  std::string histogram_name;
52  double value;
53  double boundary_value;
54  if (!args->GetString(0, &histogram_name) ||
55      !args->GetDouble(1, &value) ||
56      !args->GetDouble(2, &boundary_value)) {
57    NOTREACHED();
58    return;
59  }
60
61  int int_value = static_cast<int>(value);
62  int int_boundary_value = static_cast<int>(boundary_value);
63  if (int_boundary_value >= 4000 ||
64      int_value > int_boundary_value ||
65      int_value < 0) {
66    NOTREACHED();
67    return;
68  }
69
70  int bucket_count = int_boundary_value;
71  while (bucket_count >= 100) {
72    bucket_count /= 10;
73  }
74
75  // As |histogram_name| may change between calls, the UMA_HISTOGRAM_ENUMERATION
76  // macro cannot be used here.
77  base::HistogramBase* counter =
78      base::LinearHistogram::FactoryGet(
79          histogram_name, 1, int_boundary_value, bucket_count + 1,
80          base::HistogramBase::kUmaTargetedHistogramFlag);
81  counter->Add(int_value);
82}
83
84void MetricsHandler::HandleLogEventTime(const ListValue* args) {
85  std::string event_name = UTF16ToUTF8(ExtractStringValue(args));
86  WebContents* tab = web_ui()->GetWebContents();
87
88  // Not all new tab pages get timed. In those cases, we don't have a
89  // new_tab_start_time_.
90  CoreTabHelper* core_tab_helper = CoreTabHelper::FromWebContents(tab);
91  if (core_tab_helper->new_tab_start_time().is_null())
92    return;
93
94  base::TimeDelta duration =
95      base::TimeTicks::Now() - core_tab_helper->new_tab_start_time();
96  MetricEventDurationDetails details(event_name,
97      static_cast<int>(duration.InMilliseconds()));
98
99  if (event_name == "Tab.NewTabScriptStart") {
100    UMA_HISTOGRAM_TIMES("Tab.NewTabScriptStart", duration);
101  } else if (event_name == "Tab.NewTabDOMContentLoaded") {
102    UMA_HISTOGRAM_TIMES("Tab.NewTabDOMContentLoaded", duration);
103  } else if (event_name == "Tab.NewTabOnload") {
104    UMA_HISTOGRAM_TIMES("Tab.NewTabOnload", duration);
105    // The new tab page has finished loading; reset it.
106    CoreTabHelper* core_tab_helper = CoreTabHelper::FromWebContents(tab);
107    core_tab_helper->set_new_tab_start_time(base::TimeTicks());
108  } else {
109    NOTREACHED();
110  }
111  content::NotificationService::current()->Notify(
112      chrome::NOTIFICATION_METRIC_EVENT_DURATION,
113      content::Source<WebContents>(tab),
114      content::Details<MetricEventDurationDetails>(&details));
115}
116
117void MetricsHandler::HandleLogMouseover(const ListValue* args) {
118  NTPUserDataLogger* data = NTPUserDataLogger::FromWebContents(
119      web_ui()->GetWebContents());
120  if (data)
121    data->increment_number_of_mouseovers();
122}
123