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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/display/display_configuration_observer.h"
#include "ash/constants/ash_switches.h"
#include "ash/display/display_prefs.h"
#include "ash/shell.h"
#include "ash/wm/tablet_mode/tablet_mode_controller.h"
#include "base/command_line.h"
#include "base/functional/bind.h"
#include "base/task/single_thread_task_runner.h"
#include "ui/display/manager/display_layout_store.h"
#include "ui/display/manager/display_manager.h"
#include "ui/display/tablet_state.h"
namespace ash {
DisplayConfigurationObserver::DisplayConfigurationObserver() {
Shell::Get()->display_manager()->AddDisplayManagerObserver(this);
}
DisplayConfigurationObserver::~DisplayConfigurationObserver() {
Shell::Get()->display_manager()->RemoveDisplayManagerObserver(this);
}
void DisplayConfigurationObserver::OnDisplaysInitialized() {
// Update the display pref with the initial power state.
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kFirstExecAfterBoot))
Shell::Get()->display_prefs()->MaybeStoreDisplayPrefs();
}
void DisplayConfigurationObserver::OnDidApplyDisplayChanges() {
Shell::Get()->display_prefs()->MaybeStoreDisplayPrefs();
}
void DisplayConfigurationObserver::OnDisplayTabletStateChanged(
display::TabletState state) {
switch (state) {
case display::TabletState::kEnteringTabletMode:
case display::TabletState::kExitingTabletMode:
// Do nothing when the tablet state is still in the process of transition.
break;
case display::TabletState::kInTabletMode:
// Setting mirror mode may destroy the secondary SystemTray, so use
// PostTask to set mirror mode in the next frame in case other
// TabletModeObserver entries are owned by the SystemTray.
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(&DisplayConfigurationObserver::StartMirrorMode,
weak_ptr_factory_.GetWeakPtr()));
break;
case display::TabletState::kInClamshellMode:
// See comment for kInTabletMode.
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(&DisplayConfigurationObserver::EndMirrorMode,
weak_ptr_factory_.GetWeakPtr()));
break;
}
}
void DisplayConfigurationObserver::StartMirrorMode() {
// TODO(oshima): Tablet mode defaults to mirror mode until we figure out
// how to handle this scenario, and we shouldn't save this state.
// https://crbug.com/733092.
display::DisplayManager* display_manager = Shell::Get()->display_manager();
was_in_mirror_mode_ = display_manager->IsInMirrorMode();
display_manager->layout_store()->set_forced_mirror_mode_for_tablet(true);
display_manager->SetMirrorMode(display::MirrorMode::kNormal, std::nullopt);
}
void DisplayConfigurationObserver::EndMirrorMode() {
if (!was_in_mirror_mode_) {
Shell::Get()->display_manager()->SetMirrorMode(display::MirrorMode::kOff,
std::nullopt);
}
display::DisplayManager* display_manager = Shell::Get()->display_manager();
display_manager->layout_store()->set_forced_mirror_mode_for_tablet(false);
}
} // namespace ash
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