mash: Migrate [Keyboard]Brightness code to ash/common.

ash/system/chromeos/brightness/tray_brightness.cc

-// 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 "ash/system/chromeos/brightness/tray_brightness.h"
-
-#include <algorithm>
-
-#include "ash/accelerators/accelerator_controller.h"
-#include "ash/common/ash_constants.h"
-#include "ash/common/shell_observer.h"
-#include "ash/common/system/tray/fixed_sized_image_view.h"
-#include "ash/common/system/tray/system_tray_delegate.h"
-#include "ash/common/system/tray/tray_constants.h"
-#include "ash/common/wm/maximize_mode/maximize_mode_controller.h"
-#include "ash/common/wm_shell.h"
-#include "ash/shell.h"
-#include "ash/system/brightness_control_delegate.h"
-#include "base/bind.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/threading/thread_task_runner_handle.h"
-#include "chromeos/dbus/dbus_thread_manager.h"
-#include "chromeos/dbus/power_manager_client.h"
-#include "grit/ash_resources.h"
-#include "grit/ash_strings.h"
-#include "ui/base/resource/resource_bundle.h"
-#include "ui/display/display.h"
-#include "ui/gfx/image/image.h"
-#include "ui/views/controls/button/image_button.h"
-#include "ui/views/controls/image_view.h"
-#include "ui/views/controls/label.h"
-#include "ui/views/controls/slider.h"
-#include "ui/views/layout/box_layout.h"
-#include "ui/views/view.h"
-
-namespace ash {
-namespace tray {
-namespace {
-
-// We don't let the screen brightness go lower than this when it's being
-// adjusted via the slider.  Otherwise, if the user doesn't know about the
-// brightness keys, they may turn the backlight off and not know how to turn it
-// back on.
-const double kMinBrightnessPercent = 5.0;
-
-}  // namespace
-
-class BrightnessView : public ShellObserver,
-                       public views::View,
-                       public views::SliderListener {
- public:
-  BrightnessView(bool default_view, double initial_percent);
-  ~BrightnessView() override;
-
-  bool is_default_view() const { return is_default_view_; }
-
-  // |percent| is in the range [0.0, 100.0].
-  void SetBrightnessPercent(double percent);
-
-  // ShellObserver:
-  void OnMaximizeModeStarted() override;
-  void OnMaximizeModeEnded() override;
-
- private:
-  // views::View:
-  void OnBoundsChanged(const gfx::Rect& old_bounds) override;
-
-  // views:SliderListener:
-  void SliderValueChanged(views::Slider* sender,
-                          float value,
-                          float old_value,
-                          views::SliderChangeReason reason) override;
-
-  // views:SliderListener:
-  void SliderDragStarted(views::Slider* slider) override;
-  void SliderDragEnded(views::Slider* slider) override;
-
-  views::Slider* slider_;
-
-  // Is |slider_| currently being dragged?
-  bool dragging_;
-
-  // True if this view is for the default tray view. Used to control hide/show
-  // behaviour of the default view when entering or leaving Maximize Mode.
-  bool is_default_view_;
-
-  // Last brightness level that we observed, in the range [0.0, 100.0].
-  double last_percent_;
-
-  DISALLOW_COPY_AND_ASSIGN(BrightnessView);
-};
-
-BrightnessView::BrightnessView(bool default_view, double initial_percent)
-    : dragging_(false),
-      is_default_view_(default_view),
-      last_percent_(initial_percent) {
-  SetLayoutManager(new views::BoxLayout(views::BoxLayout::kHorizontal,
-                                        kTrayPopupPaddingHorizontal, 0,
-                                        kTrayPopupPaddingBetweenItems));
-
-  views::ImageView* icon = new FixedSizedImageView(0, kTrayPopupItemHeight);
-  gfx::Image image = ui::ResourceBundle::GetSharedInstance().GetImageNamed(
-      IDR_AURA_UBER_TRAY_BRIGHTNESS);
-  icon->SetImage(image.ToImageSkia());
-  AddChildView(icon);
-
-  slider_ = new views::Slider(this, views::Slider::HORIZONTAL);
-  slider_->set_focus_border_color(kFocusBorderColor);
-  slider_->SetValue(static_cast<float>(initial_percent / 100.0));
-  slider_->SetAccessibleName(
-      ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
-          IDS_ASH_STATUS_TRAY_BRIGHTNESS));
-  AddChildView(slider_);
-
-  if (is_default_view_) {
-    WmShell::Get()->AddShellObserver(this);
-    SetVisible(WmShell::Get()
-                   ->maximize_mode_controller()
-                   ->IsMaximizeModeWindowManagerEnabled());
-  }
-}
-
-BrightnessView::~BrightnessView() {
-  if (is_default_view_)
-    WmShell::Get()->RemoveShellObserver(this);
-}
-
-void BrightnessView::SetBrightnessPercent(double percent) {
-  last_percent_ = percent;
-  if (!dragging_)
-    slider_->SetValue(static_cast<float>(percent / 100.0));
-}
-
-void BrightnessView::OnMaximizeModeStarted() {
-  SetVisible(true);
-}
-
-void BrightnessView::OnMaximizeModeEnded() {
-  SetVisible(false);
-}
-
-void BrightnessView::OnBoundsChanged(const gfx::Rect& old_bounds) {
-  int w = width() - slider_->x();
-  slider_->SetSize(gfx::Size(w, slider_->height()));
-}
-
-void BrightnessView::SliderValueChanged(views::Slider* sender,
-                                        float value,
-                                        float old_value,
-                                        views::SliderChangeReason reason) {
-  DCHECK_EQ(sender, slider_);
-  if (reason != views::VALUE_CHANGED_BY_USER)
-    return;
-  AcceleratorController* ac = Shell::GetInstance()->accelerator_controller();
-  if (ac->brightness_control_delegate()) {
-    double percent = std::max(value * 100.0, kMinBrightnessPercent);
-    ac->brightness_control_delegate()->SetBrightnessPercent(percent, true);
-  }
-}
-
-void BrightnessView::SliderDragStarted(views::Slider* slider) {
-  DCHECK_EQ(slider, slider_);
-  dragging_ = true;
-}
-
-void BrightnessView::SliderDragEnded(views::Slider* slider) {
-  DCHECK_EQ(slider, slider_);
-  dragging_ = false;
-  slider_->SetValue(static_cast<float>(last_percent_ / 100.0));
-}
-
-}  // namespace tray
-
-TrayBrightness::TrayBrightness(SystemTray* system_tray)
-    : SystemTrayItem(system_tray),
-      brightness_view_(NULL),
-      current_percent_(100.0),
-      got_current_percent_(false),
-      weak_ptr_factory_(this) {
-  // Post a task to get the initial brightness; the BrightnessControlDelegate
-  // isn't created yet.
-  base::ThreadTaskRunnerHandle::Get()->PostTask(
-      FROM_HERE, base::Bind(&TrayBrightness::GetInitialBrightness,
-                            weak_ptr_factory_.GetWeakPtr()));
-  chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(
-      this);
-}
-
-TrayBrightness::~TrayBrightness() {
-  chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->RemoveObserver(
-      this);
-}
-
-void TrayBrightness::GetInitialBrightness() {
-  BrightnessControlDelegate* delegate = Shell::GetInstance()
-                                            ->accelerator_controller()
-                                            ->brightness_control_delegate();
-  // Worrisome, but happens in unit tests, so don't log anything.
-  if (!delegate)
-    return;
-  delegate->GetBrightnessPercent(
-      base::Bind(&TrayBrightness::HandleInitialBrightness,
-                 weak_ptr_factory_.GetWeakPtr()));
-}
-
-void TrayBrightness::HandleInitialBrightness(double percent) {
-  if (!got_current_percent_)
-    HandleBrightnessChanged(percent, false);
-}
-
-views::View* TrayBrightness::CreateTrayView(LoginStatus status) {
-  return NULL;
-}
-
-views::View* TrayBrightness::CreateDefaultView(LoginStatus status) {
-  CHECK(brightness_view_ == NULL);
-  brightness_view_ = new tray::BrightnessView(true, current_percent_);
-  return brightness_view_;
-}
-
-views::View* TrayBrightness::CreateDetailedView(LoginStatus status) {
-  CHECK(brightness_view_ == NULL);
-  WmShell::Get()->RecordUserMetricsAction(
-      UMA_STATUS_AREA_DETAILED_BRIGHTNESS_VIEW);
-  brightness_view_ = new tray::BrightnessView(false, current_percent_);
-  return brightness_view_;
-}
-
-void TrayBrightness::DestroyTrayView() {}
-
-void TrayBrightness::DestroyDefaultView() {
-  if (brightness_view_ && brightness_view_->is_default_view())
-    brightness_view_ = NULL;
-}
-
-void TrayBrightness::DestroyDetailedView() {
-  if (brightness_view_ && !brightness_view_->is_default_view())
-    brightness_view_ = NULL;
-}
-
-void TrayBrightness::UpdateAfterLoginStatusChange(LoginStatus status) {}
-
-bool TrayBrightness::ShouldHideArrow() const {
-  return true;
-}
-
-bool TrayBrightness::ShouldShowShelf() const {
-  return false;
-}
-
-void TrayBrightness::BrightnessChanged(int level, bool user_initiated) {
-  WmShell::Get()->RecordUserMetricsAction(UMA_STATUS_AREA_BRIGHTNESS_CHANGED);
-  double percent = static_cast<double>(level);
-  HandleBrightnessChanged(percent, user_initiated);
-}
-
-void TrayBrightness::HandleBrightnessChanged(double percent,
-                                             bool user_initiated) {
-  current_percent_ = percent;
-  got_current_percent_ = true;
-
-  if (brightness_view_)
-    brightness_view_->SetBrightnessPercent(percent);
-
-  if (!user_initiated)
-    return;
-
-  // Never show the bubble on systems that lack internal displays: if an
-  // external display's brightness is changed, it may already display the new
-  // level via an on-screen display.
-  if (!display::Display::HasInternalDisplay())
-    return;
-
-  if (brightness_view_)
-    SetDetailedViewCloseDelay(kTrayPopupAutoCloseDelayInSeconds);
-  else
-    PopupDetailedView(kTrayPopupAutoCloseDelayInSeconds, false);
-}
-
-}  // namespace ash