content/browser/user_metrics.cc

   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 #include "content/public/browser/user_metrics.h"
   6
   7 #include <vector>
   8
   9 #include "base/bind.h"
  10 #include "base/lazy_instance.h"
  11 #include "content/public/browser/browser_thread.h"
  12
  13 namespace content {
  14 namespace {
  15
  16 base::LazyInstance<std::vector<ActionCallback> > g_action_callbacks =
  17     LAZY_INSTANCE_INITIALIZER;
  18
  19 // Forward declare because of circular dependency.
  20 void CallRecordOnUI(const std::string& action);
  21
  22 void Record(const char *action) {
  23   if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
  24     BrowserThread::PostTask(
  25         BrowserThread::UI,
  26         FROM_HERE,
  27         base::Bind(&CallRecordOnUI, action));
  28     return;
  29   }
  30
  31   for (size_t i = 0; i < g_action_callbacks.Get().size(); i++)
  32     g_action_callbacks.Get()[i].Run(action);
  33 }
  34
  35 void CallRecordOnUI(const std::string& action) {
  36   Record(action.c_str());
  37 }
  38
  39 }  // namespace
  40
  41 void RecordAction(const UserMetricsAction& action) {
  42   Record(action.str_);
  43 }
  44
  45 void RecordComputedAction(const std::string& action) {
  46   Record(action.c_str());
  47 }
  48
  49 void AddActionCallback(const ActionCallback& callback) {
  50   g_action_callbacks.Get().push_back(callback);
  51 }
  52
  53 void RemoveActionCallback(const ActionCallback& callback) {
  54   for (size_t i = 0; i < g_action_callbacks.Get().size(); i++) {
  55     if (g_action_callbacks.Get()[i].Equals(callback)) {
  56       g_action_callbacks.Get().erase(g_action_callbacks.Get().begin() + i);
  57       return;
  58     }
  59   }
  60 }
  61
  62 }  // namespace content