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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 "ash/session_state_delegate.h"
#include "ash/shell.h"
#include "ash/shell_delegate.h"
#include "ash/wm/mru_window_tracker.h"
#include "ash/wm/overview/window_selector.h"
#include "ash/wm/window_util.h"
#include "base/metrics/histogram.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.
return !Shell::GetInstance()->session_state_delegate()->IsScreenLocked() &&
!Shell::GetInstance()->IsSystemModalWindowOpen();
}
void WindowSelectorController::ToggleOverview() {
if (IsSelecting()) {
OnSelectionCanceled();
} else {
std::vector<aura::Window*> windows = ash::Shell::GetInstance()->
mru_window_tracker()->BuildMruWindowList();
// Don't enter overview mode with no windows.
if (windows.empty())
return;
window_selector_.reset(
new WindowSelector(windows, WindowSelector::OVERVIEW, this));
OnSelectionStarted();
}
}
void WindowSelectorController::HandleCycleWindow(
WindowSelector::Direction direction) {
if (!CanSelect())
return;
if (!IsSelecting()) {
std::vector<aura::Window*> windows = ash::Shell::GetInstance()->
mru_window_tracker()->BuildMruWindowList();
// Don't cycle with no windows.
if (windows.empty())
return;
window_selector_.reset(
new WindowSelector(windows, WindowSelector::CYCLE, this));
OnSelectionStarted();
}
window_selector_->Step(direction);
}
bool WindowSelectorController::IsSelecting() {
return window_selector_.get() != NULL;
}
void WindowSelectorController::OnWindowSelected(aura::Window* window) {
window_selector_.reset();
wm::ActivateWindow(window);
last_selection_time_ = base::Time::Now();
}
void WindowSelectorController::OnSelectionCanceled() {
window_selector_.reset();
last_selection_time_ = base::Time::Now();
}
void WindowSelectorController::OnSelectionStarted() {
Shell* shell = Shell::GetInstance();
shell->delegate()->RecordUserMetricsAction(UMA_WINDOW_SELECTION);
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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