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// Copyright 2013 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/overview/window_selector_controller.h"
#include <vector>
#include "ash/metrics/user_metrics_recorder.h"
#include "ash/root_window_controller.h"
#include "ash/session/session_state_delegate.h"
#include "ash/shell.h"
#include "ash/system/tray/system_tray_delegate.h"
#include "ash/wm/mru_window_tracker.h"
#include "ash/wm/overview/window_selector.h"
#include "ash/wm/window_state.h"
#include "ash/wm/window_util.h"
#include "base/metrics/histogram.h"
#include "ui/aura/window.h"
namespace ash {
WindowSelectorController::WindowSelectorController() {
}
WindowSelectorController::~WindowSelectorController() {
}
// static
bool WindowSelectorController::CanSelect() {
// Don't allow a window overview if the screen is locked or a modal dialog is
// open or running in kiosk app session.
return Shell::GetInstance()->session_state_delegate()->
IsActiveUserSessionStarted() &&
!Shell::GetInstance()->session_state_delegate()->IsScreenLocked() &&
!Shell::GetInstance()->IsSystemModalWindowOpen() &&
Shell::GetInstance()->system_tray_delegate()->GetUserLoginStatus() !=
user::LOGGED_IN_KIOSK_APP;
}
void WindowSelectorController::ToggleOverview() {
if (IsSelecting()) {
OnSelectionEnded();
} else {
// Don't start overview if window selection is not allowed.
if (!CanSelect())
return;
std::vector<aura::Window*> windows = ash::Shell::GetInstance()->
mru_window_tracker()->BuildMruWindowList();
// Don't enter overview mode with no windows.
if (windows.empty())
return;
Shell::GetInstance()->OnOverviewModeStarting();
window_selector_.reset(new WindowSelector(this));
window_selector_->Init(windows);
OnSelectionStarted();
}
}
bool WindowSelectorController::IsSelecting() {
return window_selector_.get() != NULL;
}
bool WindowSelectorController::IsRestoringMinimizedWindows() const {
return window_selector_.get() != NULL &&
window_selector_->restoring_minimized_windows();
}
// TODO(flackr): Make WindowSelectorController observe the activation of
// windows, so we can remove WindowSelectorDelegate.
void WindowSelectorController::OnSelectionEnded() {
window_selector_->Shutdown();
window_selector_.reset();
last_selection_time_ = base::Time::Now();
Shell::GetInstance()->OnOverviewModeEnded();
}
void WindowSelectorController::OnSelectionStarted() {
if (!last_selection_time_.is_null()) {
UMA_HISTOGRAM_LONG_TIMES(
"Ash.WindowSelector.TimeBetweenUse",
base::Time::Now() - last_selection_time_);
}
}
} // namespace ash
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