| // Copyright 2014 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/wm/window_cycle_controller.h" |
| |
| #include "ash/metrics/task_switch_metrics_recorder.h" |
| #include "ash/metrics/task_switch_source.h" |
| #include "ash/metrics/user_metrics_recorder.h" |
| #include "ash/public/cpp/shell_window_ids.h" |
| #include "ash/session/session_controller.h" |
| #include "ash/shell.h" |
| #include "ash/wm/mru_window_tracker.h" |
| #include "ash/wm/screen_pinning_controller.h" |
| #include "ash/wm/window_cycle_event_filter.h" |
| #include "ash/wm/window_cycle_list.h" |
| #include "ash/wm/window_util.h" |
| #include "base/metrics/histogram_macros.h" |
| #include "base/metrics/user_metrics.h" |
| |
| namespace ash { |
| |
| namespace { |
| |
| // Returns the most recently active window from the |window_list| or nullptr |
| // if the list is empty. |
| aura::Window* GetActiveWindow(const WindowCycleList::WindowList& window_list) { |
| return window_list.empty() ? nullptr : window_list[0]; |
| } |
| |
| } // namespace |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| // WindowCycleController, public: |
| |
| WindowCycleController::WindowCycleController() = default; |
| |
| WindowCycleController::~WindowCycleController() = default; |
| |
| // static |
| bool WindowCycleController::CanCycle() { |
| // Prevent window cycling if the screen is locked or a modal dialog is open. |
| return !Shell::Get()->session_controller()->IsScreenLocked() && |
| !Shell::IsSystemModalWindowOpen() && |
| !Shell::Get()->screen_pinning_controller()->IsPinned(); |
| } |
| |
| void WindowCycleController::HandleCycleWindow(Direction direction) { |
| if (!CanCycle()) |
| return; |
| |
| if (!IsCycling()) |
| StartCycling(); |
| |
| Step(direction); |
| } |
| |
| void WindowCycleController::StartCycling() { |
| WindowCycleList::WindowList window_list = |
| Shell::Get()->mru_window_tracker()->BuildWindowForCycleList(); |
| // Window cycle list windows will handle showing their transient related |
| // windows, so if a window in |window_list| has a transient root also in |
| // |window_list|, we can remove it as the tranisent root will handle showing |
| // the window. |
| wm::RemoveTransientDescendants(&window_list); |
| |
| active_window_before_window_cycle_ = GetActiveWindow(window_list); |
| |
| window_cycle_list_ = std::make_unique<WindowCycleList>(window_list); |
| event_filter_ = std::make_unique<WindowCycleEventFilter>(); |
| cycle_start_time_ = base::Time::Now(); |
| base::RecordAction(base::UserMetricsAction("WindowCycleController_Cycle")); |
| UMA_HISTOGRAM_COUNTS_100("Ash.WindowCycleController.Items", |
| window_list.size()); |
| } |
| |
| void WindowCycleController::CompleteCycling() { |
| window_cycle_list_->set_user_did_accept(true); |
| StopCycling(); |
| } |
| |
| void WindowCycleController::CancelCycling() { |
| StopCycling(); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| // WindowCycleController, private: |
| |
| void WindowCycleController::Step(Direction direction) { |
| DCHECK(window_cycle_list_.get()); |
| window_cycle_list_->Step(direction); |
| } |
| |
| void WindowCycleController::StopCycling() { |
| UMA_HISTOGRAM_COUNTS_100("Ash.WindowCycleController.SelectionDepth", |
| window_cycle_list_->current_index() + 1); |
| window_cycle_list_.reset(); |
| |
| aura::Window* active_window_after_window_cycle = |
| GetActiveWindow(Shell::Get()->mru_window_tracker()->BuildMruWindowList()); |
| |
| // Remove our key event filter. |
| event_filter_.reset(); |
| UMA_HISTOGRAM_MEDIUM_TIMES("Ash.WindowCycleController.CycleTime", |
| base::Time::Now() - cycle_start_time_); |
| |
| if (active_window_after_window_cycle != nullptr && |
| active_window_before_window_cycle_ != active_window_after_window_cycle) { |
| Shell::Get()->metrics()->task_switch_metrics_recorder().OnTaskSwitch( |
| TaskSwitchSource::WINDOW_CYCLE_CONTROLLER); |
| } |
| active_window_before_window_cycle_ = nullptr; |
| } |
| |
| } // namespace ash |