Enabled/disable touch screen in TabletPowerButtonController

ash/system/chromeos/power/tablet_power_button_controller.cc

 // Copyright 2016 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/power/tablet_power_button_controller.h"
 
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/session/session_state_delegate.h"
+#include "ash/common/shell_delegate.h"
 #include "ash/common/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/common/wm_shell.h"
 #include "ash/shell.h"
 #include "ash/wm/lock_state_controller.h"
 #include "base/time/default_tick_clock.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "ui/events/devices/input_device_manager.h"
 #include "ui/events/devices/stylus_state.h"
 #include "ui/events/event.h"
 
@@ skipping 147 matching lines @@
     SetBacklightsForcedOff(false);
   }
 }
 
 void TabletPowerButtonController::SetTickClockForTesting(
     std::unique_ptr<base::TickClock> tick_clock) {
   DCHECK(tick_clock);
   tick_clock_ = std::move(tick_clock);
 }
 
 void TabletPowerButtonController::SetBacklightsForcedOff(bool forced_off) {

[Daniel Erat, 2016/11/29 21:03:36]

this should probably be renamed now, as it does more than just controlling
whether the backlight is forced off. maybe rename it to e.g. SetDisplayForcedOff
and document that it controls both the backlight and the touchscreen?

[Qiang(Joe) Xu, 2016/11/30 22:09:11]

Done.

   if (backlights_forced_off_ == forced_off)
     return;
 
   chromeos::DBusThreadManager::Get()
       ->GetPowerManagerClient()
       ->SetBacklightsForcedOff(forced_off);
   backlights_forced_off_ = forced_off;
 
+  // ToggleTouchscreen when there is a request/stop backlights forced off call
+  // and touch screen should be toggled.
+  WmShell* wm_shell = WmShell::Get();
+  const bool touch_screen_disabled =
+      !wm_shell->delegate()->IsTouchscreenEnabled();
+  if (touch_screen_disabled ^ forced_off)
+    wm_shell->delegate()->ToggleTouchscreen();
+
   // Send an a11y alert.
-  WmShell::Get()->accessibility_delegate()->TriggerAccessibilityAlert(
+  wm_shell->accessibility_delegate()->TriggerAccessibilityAlert(
       forced_off ? A11Y_ALERT_SCREEN_OFF : A11Y_ALERT_SCREEN_ON);
 }
 
 void TabletPowerButtonController::GetInitialBacklightsForcedOff() {
   chromeos::DBusThreadManager::Get()
       ->GetPowerManagerClient()
       ->GetBacklightsForcedOff(base::Bind(
           &TabletPowerButtonController::OnGotInitialBacklightsForcedOff,
           weak_ptr_factory_.GetWeakPtr()));
 }
@@ skipping 18 matching lines @@
       WmShell::Get()->GetSessionStateDelegate();
   if (session_state_delegate->ShouldLockScreenAutomatically() &&
       session_state_delegate->CanLockScreen() &&
       !session_state_delegate->IsUserSessionBlocked() &&
       !controller_->LockRequested()) {
     session_state_delegate->LockScreen();
   }
 }
 
 }  // namespace ash