Add dark mode feature pod.

This CL adds skeleton code for the dark mode feature pod.

Bug: 1106012
Change-Id: Icb4046bf25fd90482a69588611445a2604c39247
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2339289
Commit-Queue: Ahmed Mehfooz <amehfooz@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796726}

ash/BUILD.gn

@@ -878,6 +878,8 @@ component("ash") {
     "system/cast/tray_cast.h",
     "system/cast/unified_cast_detailed_view_controller.cc",
     "system/cast/unified_cast_detailed_view_controller.h",
+    "system/dark_mode/dark_mode_feature_pod_controller.cc",
+    "system/dark_mode/dark_mode_feature_pod_controller.h",
     "system/enterprise/enterprise_domain_observer.h",
     "system/gesture_education/gesture_education_notification_controller.cc",
     "system/gesture_education/gesture_education_notification_controller.h",

ash/ash_strings.grd

@@ -327,6 +327,27 @@ This file contains the strings for ash.
       <message name="IDS_ASH_STATUS_TRAY_CAST_CAST_DESKTOP" desc="The label used in the tray popup to tell the user we are casting the desktop.">
         Casting screen to <ph name="RECEIVER_NAME">$1<ex>Living Room</ex></ph>
       </message>
+      <message name="IDS_ASH_STATUS_TRAY_DARK_MODE_BUTTON_LABEL" desc="The shorter label used for the button in the status tray to toggle the Dark Mode feature (which controls the color temperature of the screen) on or off. [CHAR_LIMIT=14]">
+        Dark Mode
+      </message>
+      <message name="IDS_ASH_STATUS_TRAY_DARK_MODE_TOGGLE_TOOLTIP" desc="The tooltip text used for the button in the status tray to toggle the Dark Mode feature (which controls the color temperature of the screen) on or off.">
+        Toggle Dark Mode. <ph name="STATE_TEXT">$1<ex>Dark Mode is on.</ex></ph>
+      </message>
+      <message name="IDS_ASH_STATUS_TRAY_DARK_MODE_ENABLED_STATE_TOOLTIP" desc="The tooltip text indicating the Dark Mode feature is on.">
+        Dark Mode is on.
+      </message>
+      <message name="IDS_ASH_STATUS_TRAY_DARK_MODE_DISABLED_STATE_TOOLTIP" desc="The tooltip text indicating the Dark Mode feature is off.">
+        Dark Mode is off.
+      </message>
+      <message name="IDS_ASH_STATUS_TRAY_DARK_MODE_SETTINGS_TOOLTIP" desc="The tooltip text used for the button in the status tray to show the Dark Mode feature (which controls the color temperature of the screen) settings.">
+        Show dark mode settings
+      </message>
+      <message name="IDS_ASH_STATUS_TRAY_DARK_MODE_OFF_STATE" desc="Button label for the Dark Mode feature." meaning="Dark Mode feature is off. [CHAR_LIMIT=14]">
+        Off
+      </message>
+      <message name="IDS_ASH_STATUS_TRAY_DARK_MODE_ON_STATE" desc="Button label for the Dark Mode feature." meaning="Dark Mode feature is on. [CHAR_LIMIT=14]">
+        On
+      </message>
       <message name="IDS_ASH_STATUS_TRAY_CAST_CAST_DESKTOP_ACCESSIBILITY_STOP" desc="Stop button accessibility label used in the tray popup to tell the user to stop a cast to the desktop.">
         Stop casting screen to <ph name="RECEIVER_NAME">$1<ex>Living Room</ex></ph>
       </message>

ash/ash_strings_grd/IDS_ASH_STATUS_TRAY_DARK_MODE_BUTTON_LABEL.png.sha1

+b892fca63156aa42e5d4d2700cd4aa4764f96ce5
\ No newline at end of file

ash/ash_strings_grd/IDS_ASH_STATUS_TRAY_DARK_MODE_DISABLED_STATE_TOOLTIP.png.sha1

+59a5e1355448f6dde367ffd0ba6003357259df40
\ No newline at end of file

ash/ash_strings_grd/IDS_ASH_STATUS_TRAY_DARK_MODE_ENABLED_STATE_TOOLTIP.png.sha1

+effba266de5e3b9897f8ca0f75b62e64d7283528
\ No newline at end of file

ash/ash_strings_grd/IDS_ASH_STATUS_TRAY_DARK_MODE_OFF_STATE.png.sha1

+87c3f620147db29ff48afa7be1b2499376a0cd84
\ No newline at end of file

ash/ash_strings_grd/IDS_ASH_STATUS_TRAY_DARK_MODE_ON_STATE.png.sha1

+b892fca63156aa42e5d4d2700cd4aa4764f96ce5
\ No newline at end of file

ash/ash_strings_grd/IDS_ASH_STATUS_TRAY_DARK_MODE_SETTINGS_TOOLTIP.png.sha1

+59a5e1355448f6dde367ffd0ba6003357259df40
\ No newline at end of file

ash/ash_strings_grd/IDS_ASH_STATUS_TRAY_DARK_MODE_TOGGLE_TOOLTIP.png.sha1

+adf958e8343448faee9d7fa20015b599fc1ec86f
\ No newline at end of file

ash/resources/vector_icons/BUILD.gn

@@ -281,6 +281,7 @@ aggregate_vector_icons("ash_vector_icons") {
     "unified_menu_bluetooth.icon",
     "unified_menu_brightness.icon",
     "unified_menu_cast.icon",
+    "unified_menu_dark_mode.icon",
     "unified_menu_do_not_disturb.icon",
     "unified_menu_expand.icon",
     "unified_menu_info.icon",

ash/resources/vector_icons/unified_menu_dark_mode.icon

+// Copyright 2018 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.
+
+CANVAS_DIMENSIONS, 40,
+MOVE_TO, 20, 36,
+R_CUBIC_TO, 8.84f, 0, 16, -7.16f, 16, -16,
+CUBIC_TO_SHORTHAND, 28.84f, 4, 20, 4,
+CUBIC_TO_SHORTHAND, 4, 11.16f, 4, 20,
+R_CUBIC_TO, 0, 8.84f, 7.16f, 16, 16, 16,
+CLOSE,
+R_MOVE_TO, 0, -28.23f,
+R_CUBIC_TO, 6.76f, 0, 12.24f, 5.48f, 12.24f, 12.24f,
+CUBIC_TO_SHORTHAND, 26.76f, 32.24f, 20, 32.24f,
+V_LINE_TO, 7.77f,
+CLOSE
+
+CANVAS_DIMENSIONS, 20,
+MOVE_TO, 10, 18,
+R_CUBIC_TO, 4.42f, 0, 8, -3.58f, 8, -8,
+R_CUBIC_TO, 0, -4.42f, -3.58f, -8, -8, -8,
+R_CUBIC_TO, -4.42f, 0, -8, 3.58f, -8, 8,
+R_CUBIC_TO, 0, 4.42f, 3.58f, 8, 8, 8,
+CLOSE,
+R_MOVE_TO, 0, -14.12f,
+R_CUBIC_TO, 3.38f, 0, 6.12f, 2.74f, 6.12f, 6.12f,
+R_CUBIC_TO, 0, 3.38f, -2.74f, 6.12f, -6.12f, 6.12f,
+V_LINE_TO, 3.88f,
+CLOSE

ash/system/dark_mode/OWNERS

+amehfooz@chromium.org
+tengs@chromium.org
\ No newline at end of file

ash/system/dark_mode/dark_mode_feature_pod_controller.cc

+// Copyright 2020 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/dark_mode/dark_mode_feature_pod_controller.h"
+
+#include "ash/resources/vector_icons/vector_icons.h"
+#include "ash/strings/grit/ash_strings.h"
+#include "ash/style/ash_color_provider.h"
+#include "ash/system/unified/feature_pod_button.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace ash {
+
+DarkModeFeaturePodController::DarkModeFeaturePodController(
+    UnifiedSystemTrayController* tray_controller)
+    : tray_controller_(tray_controller) {
+  DCHECK(tray_controller_);
+}
+
+DarkModeFeaturePodController::~DarkModeFeaturePodController() = default;
+
+FeaturePodButton* DarkModeFeaturePodController::CreateButton() {
+  DCHECK(!button_);
+  button_ = new FeaturePodButton(this);
+  button_->SetVectorIcon(kUnifiedMenuDarkModeIcon);
+  button_->SetLabel(
+      l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_DARK_MODE_BUTTON_LABEL));
+  button_->SetLabelTooltip(l10n_util::GetStringUTF16(
+      IDS_ASH_STATUS_TRAY_DARK_MODE_SETTINGS_TOOLTIP));
+
+  UpdateButton();
+  return button_;
+}
+
+void DarkModeFeaturePodController::OnIconPressed() {
+  // TODO: Switch dark mode here.
+  UpdateButton();
+
+  // TODO(amehfooz): Add metrics recording here.
+}
+
+void DarkModeFeaturePodController::OnLabelPressed() {
+  // TODO(amehfooz): Add entry to detailed view here.
+}
+
+SystemTrayItemUmaType DarkModeFeaturePodController::GetUmaType() const {
+  // TODO(amehfooz): Add new UMA type here.
+  return SystemTrayItemUmaType::UMA_DARK_MODE;
+}
+
+void DarkModeFeaturePodController::UpdateButton() {
+  const bool is_enabled = AshColorProvider::Get()->color_mode() ==
+                          AshColorProvider::AshColorMode::kDark;
+  button_->SetToggled(is_enabled);
+  button_->SetSubLabel(l10n_util::GetStringUTF16(
+      is_enabled ? IDS_ASH_STATUS_TRAY_DARK_MODE_ON_STATE
+                 : IDS_ASH_STATUS_TRAY_DARK_MODE_OFF_STATE));
+
+  base::string16 tooltip_state = l10n_util::GetStringUTF16(
+      is_enabled ? IDS_ASH_STATUS_TRAY_DARK_MODE_ENABLED_STATE_TOOLTIP
+                 : IDS_ASH_STATUS_TRAY_DARK_MODE_DISABLED_STATE_TOOLTIP);
+  button_->SetIconTooltip(l10n_util::GetStringFUTF16(
+      IDS_ASH_STATUS_TRAY_DARK_MODE_TOGGLE_TOOLTIP, tooltip_state));
+}
+
+}  // namespace ash

ash/system/dark_mode/dark_mode_feature_pod_controller.h

+// Copyright 2020 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.
+
+#ifndef ASH_SYSTEM_DARK_MODE_DARK_MODE_FEATURE_POD_CONTROLLER_H_
+#define ASH_SYSTEM_DARK_MODE_DARK_MODE_FEATURE_POD_CONTROLLER_H_
+
+#include "ash/system/unified/feature_pod_controller_base.h"
+#include "base/macros.h"
+
+namespace ash {
+
+class UnifiedSystemTrayController;
+
+// Controller of a feature pod button that toggles dark mode for ash.
+class DarkModeFeaturePodController : public FeaturePodControllerBase {
+ public:
+  explicit DarkModeFeaturePodController(
+      UnifiedSystemTrayController* tray_controller);
+  DarkModeFeaturePodController(const DarkModeFeaturePodController& other) =
+      delete;
+  DarkModeFeaturePodController& operator=(
+      const DarkModeFeaturePodController& other) = delete;
+  ~DarkModeFeaturePodController() override;
+
+  // FeaturePodControllerBase:
+  FeaturePodButton* CreateButton() override;
+  void OnIconPressed() override;
+  void OnLabelPressed() override;
+  SystemTrayItemUmaType GetUmaType() const override;
+
+ private:
+  void UpdateButton();
+
+  UnifiedSystemTrayController* const tray_controller_;
+
+  FeaturePodButton* button_ = nullptr;
+};
+
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_DARK_MODE_DARK_MODE_FEATURE_POD_CONTROLLER_H_

ash/system/tray/system_tray_item_uma_type.h

@@ -44,7 +44,8 @@ enum class SystemTrayItemUmaType {
   UMA_QUIET_MODE = 27,
   UMA_LOCALE = 28,
   UMA_PRIVACY_SCREEN = 29,
-  UMA_COUNT = 30,
+  UMA_DARK_MODE = 30,
+  UMA_COUNT = 31,
 };
 
 }  // namespace ash