text: // Copyright 2013 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "chrome/browser/chromeos/first_run/step.h"
  
  #include <stddef.h>
  
  #include <cctype>
  #include <memory>
  
  #include "ash/first_run/first_run_helper.h"
  #include "base/metrics/histogram_macros.h"
  #include "chrome/browser/ui/webui/chromeos/first_run/first_run_actor.h"
  #include "ui/gfx/geometry/size.h"
  #include "ui/views/widget/widget.h"
  
  namespace {
  
  // Converts from "with-dashes-names" to "WithDashesNames".
  std::string ToCamelCase(const std::string& name) {
    std::string result;
    bool next_to_upper = true;
    for (size_t i = 0; i < name.length(); ++i) {
      if (name[i] == '-') {
        next_to_upper = true;
      } else if (next_to_upper) {
        result.push_back(std::toupper(name[i]));
        next_to_upper = false;
      } else {
        result.push_back(name[i]);
      }
    }
    return result;
  }
  
  }  // namespace
  
  namespace chromeos {
  namespace first_run {
  
  Step::Step(const std::string& name,
             ash::FirstRunHelper* shell_helper,
             FirstRunActor* actor)
      : name_(name),
        shell_helper_(shell_helper),
        actor_(actor) {
  }
  
  Step::~Step() { RecordCompletion(); }
  
  void Step::Show() {
    show_time_ = base::Time::Now();
    DoShow();
  }
  
  void Step::OnBeforeHide() {
    actor()->RemoveBackgroundHoles();
    DoOnBeforeHide();
  }
  
  void Step::OnAfterHide() {
    RecordCompletion();
    DoOnAfterHide();
  }
  
  gfx::Size Step::GetOverlaySize() const {
    return shell_helper()->GetOverlayWidget()->GetWindowBoundsInScreen().size();
  }
  
  void Step::RecordCompletion() {
    if (show_time_.is_null())
      return;
    std::string histogram_name =
        "CrosFirstRun.TimeSpentOnStep" + ToCamelCase(name());
    // Equivalent to using UMA_HISTOGRAM_CUSTOM_TIMES with 50 buckets on range
    // [100ms, 3 min.]. UMA_HISTOGRAM_CUSTOM_TIMES can not be used here, because
    // |histogram_name| is calculated dynamically and changes from call to call.
    base::HistogramBase* histogram = base::Histogram::FactoryTimeGet(
        histogram_name,
        base::TimeDelta::FromMilliseconds(100),
        base::TimeDelta::FromMinutes(3),
        50,
        base::HistogramBase::kUmaTargetedHistogramFlag);
    histogram->AddTime(base::Time::Now() - show_time_);
    show_time_ = base::Time();
  }
  
  }  // namespace first_run
  }  // namespace chromeos
  
  