chrome/browser/chromeos/first_run/step.cc

   1 // Copyright 2013 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/chromeos/first_run/step.h"
   6
   7 #include <cctype>
   8
   9 #include "ash/first_run/first_run_helper.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/metrics/histogram.h"
  12 #include "chrome/browser/ui/webui/chromeos/first_run/first_run_actor.h"
  13 #include "ui/gfx/geometry/size.h"
  14 #include "ui/views/widget/widget.h"
  15
  16 namespace {
  17
  18 // Converts from "with-dashes-names" to "WithDashesNames".
  19 std::string ToCamelCase(const std::string& name) {
  20   std::string result;
  21   bool next_to_upper = true;
  22   for (size_t i = 0; i < name.length(); ++i) {
  23     if (name[i] == '-') {
  24       next_to_upper = true;
  25     } else if (next_to_upper) {
  26       result.push_back(std::toupper(name[i]));
  27       next_to_upper = false;
  28     } else {
  29       result.push_back(name[i]);
  30     }
  31   }
  32   return result;
  33 }
  34
  35 }  // namespace
  36
  37 namespace chromeos {
  38 namespace first_run {
  39
  40 Step::Step(const std::string& name,
  41            ash::FirstRunHelper* shell_helper,
  42            FirstRunActor* actor)
  43     : name_(name),
  44       shell_helper_(shell_helper),
  45       actor_(actor) {
  46 }
  47
  48 Step::~Step() { RecordCompletion(); }
  49
  50 void Step::Show() {
  51   show_time_ = base::Time::Now();
  52   DoShow();
  53 }
  54
  55 void Step::OnBeforeHide() {
  56   actor()->RemoveBackgroundHoles();
  57   DoOnBeforeHide();
  58 }
  59
  60 void Step::OnAfterHide() {
  61   RecordCompletion();
  62   DoOnAfterHide();
  63 }
  64
  65 gfx::Size Step::GetOverlaySize() const {
  66   return shell_helper()->GetOverlayWidget()->GetWindowBoundsInScreen().size();
  67 }
  68
  69 void Step::RecordCompletion() {
  70   if (show_time_.is_null())
  71     return;
  72   std::string histogram_name =
  73       "CrosFirstRun.TimeSpentOnStep" + ToCamelCase(name());
  74   // Equivalent to using UMA_HISTOGRAM_CUSTOM_TIMES with 50 buckets on range
  75   // [100ms, 3 min.]. UMA_HISTOGRAM_CUSTOM_TIMES can not be used here, because
  76   // |histogram_name| is calculated dynamically and changes from call to call.
  77   base::HistogramBase* histogram = base::Histogram::FactoryTimeGet(
  78       histogram_name,
  79       base::TimeDelta::FromMilliseconds(100),
  80       base::TimeDelta::FromMinutes(3),
  81       50,
  82       base::HistogramBase::kUmaTargetedHistogramFlag);
  83   histogram->AddTime(base::Time::Now() - show_time_);
  84   show_time_ = base::Time();
  85 }
  86
  87 }  // namespace first_run
  88 }  // namespace chromeos
  89