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// Copyright 2017 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_move_window_util.h"
#include <stdint.h>
#include <algorithm>
#include <array>
#include "ash/accessibility/accessibility_controller_impl.h"
#include "ash/shell.h"
#include "ash/wm/mru_window_tracker.h"
#include "ash/wm/window_util.h"
#include "base/containers/contains.h"
#include "base/metrics/user_metrics.h"
#include "ui/aura/window.h"
#include "ui/display/display.h"
#include "ui/display/manager/display_manager.h"
#include "ui/display/screen.h"
#include "ui/display/types/display_constants.h"
#include "ui/display/util/display_util.h"
namespace ash {
namespace display_move_window_util {
namespace {
aura::Window* GetTargetWindow() {
aura::Window* window = window_util::GetActiveWindow();
if (!window)
return nullptr;
// If |window| is transient window, move its first non-transient
// transient-parent window instead.
if (::wm::GetTransientParent(window)) {
while (::wm::GetTransientParent(window))
window = ::wm::GetTransientParent(window);
if (window == window->GetRootWindow())
return nullptr;
}
return window;
}
} // namespace
bool CanHandleMoveActiveWindowBetweenDisplays() {
display::DisplayManager* display_manager = Shell::Get()->display_manager();
// Accelerators to move window between displays on unified desktop mode and
// mirror mode is disabled.
if (display_manager->IsInUnifiedMode() || display_manager->IsInMirrorMode())
return false;
if (display::Screen::GetScreen()->GetNumDisplays() < 2)
return false;
// The movement target window must be in window cycle list.
return base::Contains(
Shell::Get()->mru_window_tracker()->BuildWindowForCycleList(kActiveDesk),
GetTargetWindow());
}
void HandleMoveActiveWindowBetweenDisplays() {
DCHECK(CanHandleMoveActiveWindowBetweenDisplays());
aura::Window* window = GetTargetWindow();
DCHECK(window);
int64_t origin_display_id =
display::Screen::GetScreen()->GetDisplayNearestWindow(window).id();
auto displays = display::Screen::GetScreen()->GetAllDisplays();
display::DisplayIdList display_id_list =
display::CreateDisplayIdList(displays);
// Find target display id in sorted display id list in a cycling way.
auto itr = std::upper_bound(display_id_list.begin(), display_id_list.end(),
origin_display_id, display::CompareDisplayIds);
int64_t target_display_id =
itr == display_id_list.end() ? display_id_list[0] : *itr;
window_util::MoveWindowToDisplay(window, target_display_id);
Shell::Get()->accessibility_controller()->TriggerAccessibilityAlert(
AccessibilityAlert::WINDOW_MOVED_TO_ANOTHER_DISPLAY);
base::RecordAction(
base::UserMetricsAction("Accel_Move_Active_Window_Between_Displays"));
}
} // namespace display_move_window_util
} // namespace ash
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