| // 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.h" |
| |
| #include <algorithm> |
| |
| #include "ash/accessibility_delegate.h" |
| #include "ash/ash_switches.h" |
| #include "ash/metrics/user_metrics_recorder.h" |
| #include "ash/root_window_controller.h" |
| #include "ash/shell.h" |
| #include "ash/shell_window_ids.h" |
| #include "ash/switchable_windows.h" |
| #include "ash/wm/overview/scoped_transform_overview_window.h" |
| #include "ash/wm/overview/window_grid.h" |
| #include "ash/wm/overview/window_selector_delegate.h" |
| #include "ash/wm/overview/window_selector_item.h" |
| #include "ash/wm/window_state.h" |
| #include "base/auto_reset.h" |
| #include "base/metrics/histogram.h" |
| #include "ui/aura/client/focus_client.h" |
| #include "ui/aura/window.h" |
| #include "ui/aura/window_event_dispatcher.h" |
| #include "ui/aura/window_observer.h" |
| #include "ui/compositor/scoped_layer_animation_settings.h" |
| #include "ui/events/event.h" |
| #include "ui/gfx/screen.h" |
| #include "ui/wm/core/window_util.h" |
| #include "ui/wm/public/activation_client.h" |
| |
| namespace ash { |
| |
| namespace { |
| |
| // A comparator for locating a grid with a given root window. |
| struct RootWindowGridComparator |
| : public std::unary_function<WindowGrid*, bool> { |
| explicit RootWindowGridComparator(const aura::Window* root_window) |
| : root_window_(root_window) { |
| } |
| |
| bool operator()(WindowGrid* grid) const { |
| return (grid->root_window() == root_window_); |
| } |
| |
| const aura::Window* root_window_; |
| }; |
| |
| // A comparator for locating a selectable window given a targeted window. |
| struct WindowSelectorItemTargetComparator |
| : public std::unary_function<WindowSelectorItem*, bool> { |
| explicit WindowSelectorItemTargetComparator(const aura::Window* target_window) |
| : target(target_window) { |
| } |
| |
| bool operator()(WindowSelectorItem* window) const { |
| return window->Contains(target); |
| } |
| |
| const aura::Window* target; |
| }; |
| |
| // A comparator for locating a selector item for a given root. |
| struct WindowSelectorItemForRoot |
| : public std::unary_function<WindowSelectorItem*, bool> { |
| explicit WindowSelectorItemForRoot(const aura::Window* root) |
| : root_window(root) { |
| } |
| |
| bool operator()(WindowSelectorItem* item) const { |
| return item->GetRootWindow() == root_window; |
| } |
| |
| const aura::Window* root_window; |
| }; |
| |
| // Triggers a shelf visibility update on all root window controllers. |
| void UpdateShelfVisibility() { |
| Shell::RootWindowControllerList root_window_controllers = |
| Shell::GetInstance()->GetAllRootWindowControllers(); |
| for (Shell::RootWindowControllerList::iterator iter = |
| root_window_controllers.begin(); |
| iter != root_window_controllers.end(); ++iter) { |
| (*iter)->UpdateShelfVisibility(); |
| } |
| } |
| |
| } // namespace |
| |
| WindowSelector::WindowSelector(const WindowList& windows, |
| WindowSelectorDelegate* delegate) |
| : delegate_(delegate), |
| restore_focus_window_(aura::client::GetFocusClient( |
| Shell::GetPrimaryRootWindow())->GetFocusedWindow()), |
| ignore_activations_(false), |
| selected_grid_index_(0), |
| overview_start_time_(base::Time::Now()), |
| num_key_presses_(0), |
| num_items_(0) { |
| DCHECK(delegate_); |
| Shell* shell = Shell::GetInstance(); |
| shell->OnOverviewModeStarting(); |
| |
| if (restore_focus_window_) |
| restore_focus_window_->AddObserver(this); |
| |
| const aura::Window::Windows root_windows = Shell::GetAllRootWindows(); |
| for (aura::Window::Windows::const_iterator iter = root_windows.begin(); |
| iter != root_windows.end(); iter++) { |
| // Observed switchable containers for newly created windows on all root |
| // windows. |
| for (size_t i = 0; i < kSwitchableWindowContainerIdsLength; ++i) { |
| aura::Window* container = Shell::GetContainer(*iter, |
| kSwitchableWindowContainerIds[i]); |
| container->AddObserver(this); |
| observed_windows_.insert(container); |
| } |
| scoped_ptr<WindowGrid> grid(new WindowGrid(*iter, windows, this)); |
| if (grid->empty()) |
| continue; |
| num_items_ += grid->size(); |
| grid_list_.push_back(grid.release()); |
| } |
| |
| // Do not call PrepareForOverview until all items are added to window_list_ as |
| // we don't want to cause any window updates until all windows in overview |
| // are observed. See http://crbug.com/384495. |
| for (ScopedVector<WindowGrid>::iterator iter = grid_list_.begin(); |
| iter != grid_list_.end(); ++iter) { |
| (*iter)->PrepareForOverview(); |
| (*iter)->PositionWindows(true); |
| } |
| |
| DCHECK(!grid_list_.empty()); |
| UMA_HISTOGRAM_COUNTS_100("Ash.WindowSelector.Items", num_items_); |
| |
| shell->activation_client()->AddObserver(this); |
| |
| // Remove focus from active window before entering overview. |
| aura::client::GetFocusClient( |
| Shell::GetPrimaryRootWindow())->FocusWindow(NULL); |
| |
| shell->PrependPreTargetHandler(this); |
| shell->GetScreen()->AddObserver(this); |
| shell->metrics()->RecordUserMetricsAction(UMA_WINDOW_OVERVIEW); |
| HideAndTrackNonOverviewWindows(); |
| // Send an a11y alert. |
| shell->accessibility_delegate()->TriggerAccessibilityAlert( |
| A11Y_ALERT_WINDOW_OVERVIEW_MODE_ENTERED); |
| |
| UpdateShelfVisibility(); |
| } |
| |
| WindowSelector::~WindowSelector() { |
| ash::Shell* shell = ash::Shell::GetInstance(); |
| |
| ResetFocusRestoreWindow(true); |
| for (std::set<aura::Window*>::iterator iter = observed_windows_.begin(); |
| iter != observed_windows_.end(); ++iter) { |
| (*iter)->RemoveObserver(this); |
| } |
| shell->activation_client()->RemoveObserver(this); |
| aura::Window::Windows root_windows = Shell::GetAllRootWindows(); |
| |
| const aura::WindowTracker::Windows hidden_windows(hidden_windows_.windows()); |
| for (aura::WindowTracker::Windows::const_iterator iter = |
| hidden_windows.begin(); iter != hidden_windows.end(); ++iter) { |
| ui::ScopedLayerAnimationSettings settings( |
| (*iter)->layer()->GetAnimator()); |
| settings.SetTransitionDuration(base::TimeDelta::FromMilliseconds( |
| ScopedTransformOverviewWindow::kTransitionMilliseconds)); |
| settings.SetPreemptionStrategy( |
| ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET); |
| (*iter)->layer()->SetOpacity(1); |
| (*iter)->Show(); |
| } |
| |
| shell->RemovePreTargetHandler(this); |
| shell->GetScreen()->RemoveObserver(this); |
| |
| size_t remaining_items = 0; |
| for (ScopedVector<WindowGrid>::iterator iter = grid_list_.begin(); |
| iter != grid_list_.end(); iter++) { |
| remaining_items += (*iter)->size(); |
| } |
| |
| DCHECK(num_items_ >= remaining_items); |
| UMA_HISTOGRAM_COUNTS_100("Ash.WindowSelector.OverviewClosedItems", |
| num_items_ - remaining_items); |
| UMA_HISTOGRAM_MEDIUM_TIMES("Ash.WindowSelector.TimeInOverview", |
| base::Time::Now() - overview_start_time_); |
| |
| // TODO(nsatragno): Change this to OnOverviewModeEnded and move it to when |
| // everything is done. |
| shell->OnOverviewModeEnding(); |
| |
| // Clearing the window list resets the ignored_by_shelf flag on the windows. |
| grid_list_.clear(); |
| UpdateShelfVisibility(); |
| } |
| |
| void WindowSelector::CancelSelection() { |
| delegate_->OnSelectionEnded(); |
| } |
| |
| void WindowSelector::OnGridEmpty(WindowGrid* grid) { |
| ScopedVector<WindowGrid>::iterator iter = |
| std::find(grid_list_.begin(), grid_list_.end(), grid); |
| DCHECK(iter != grid_list_.end()); |
| grid_list_.erase(iter); |
| // TODO(nsatragno): Use the previous index for more than two displays. |
| selected_grid_index_ = 0; |
| if (grid_list_.empty()) |
| CancelSelection(); |
| } |
| |
| void WindowSelector::OnKeyEvent(ui::KeyEvent* event) { |
| if (event->type() != ui::ET_KEY_PRESSED) |
| return; |
| |
| switch (event->key_code()) { |
| case ui::VKEY_ESCAPE: |
| CancelSelection(); |
| break; |
| case ui::VKEY_UP: |
| num_key_presses_++; |
| Move(WindowSelector::UP); |
| break; |
| case ui::VKEY_DOWN: |
| num_key_presses_++; |
| Move(WindowSelector::DOWN); |
| break; |
| case ui::VKEY_RIGHT: |
| num_key_presses_++; |
| Move(WindowSelector::RIGHT); |
| break; |
| case ui::VKEY_LEFT: |
| num_key_presses_++; |
| Move(WindowSelector::LEFT); |
| break; |
| case ui::VKEY_RETURN: |
| // Ignore if no item is selected. |
| if (!grid_list_[selected_grid_index_]->is_selecting()) |
| return; |
| UMA_HISTOGRAM_COUNTS_100("Ash.WindowSelector.ArrowKeyPresses", |
| num_key_presses_); |
| UMA_HISTOGRAM_CUSTOM_COUNTS( |
| "Ash.WindowSelector.KeyPressesOverItemsRatio", |
| (num_key_presses_ * 100) / num_items_, 1, 300, 30); |
| Shell::GetInstance()->metrics()->RecordUserMetricsAction( |
| UMA_WINDOW_OVERVIEW_ENTER_KEY); |
| wm::GetWindowState(grid_list_[selected_grid_index_]-> |
| SelectedWindow()->SelectionWindow())->Activate(); |
| break; |
| default: |
| // Not a key we are interested in. |
| return; |
| } |
| event->StopPropagation(); |
| } |
| |
| void WindowSelector::OnDisplayAdded(const gfx::Display& display) { |
| } |
| |
| void WindowSelector::OnDisplayRemoved(const gfx::Display& display) { |
| // TODO(nsatragno): Keep window selection active on remaining displays. |
| CancelSelection(); |
| } |
| |
| void WindowSelector::OnDisplayMetricsChanged(const gfx::Display& display, |
| uint32_t metrics) { |
| PositionWindows(/* animate */ false); |
| } |
| |
| void WindowSelector::OnWindowAdded(aura::Window* new_window) { |
| if (new_window->type() != ui::wm::WINDOW_TYPE_NORMAL && |
| new_window->type() != ui::wm::WINDOW_TYPE_PANEL) { |
| return; |
| } |
| |
| for (size_t i = 0; i < kSwitchableWindowContainerIdsLength; ++i) { |
| if (new_window->parent()->id() == kSwitchableWindowContainerIds[i] && |
| !::wm::GetTransientParent(new_window)) { |
| // The new window is in one of the switchable containers, abort overview. |
| CancelSelection(); |
| return; |
| } |
| } |
| } |
| |
| void WindowSelector::OnWindowDestroying(aura::Window* window) { |
| window->RemoveObserver(this); |
| observed_windows_.erase(window); |
| if (window == restore_focus_window_) |
| restore_focus_window_ = NULL; |
| } |
| |
| void WindowSelector::OnWindowActivated(aura::Window* gained_active, |
| aura::Window* lost_active) { |
| if (ignore_activations_ || !gained_active) |
| return; |
| |
| ScopedVector<WindowGrid>::iterator grid = |
| std::find_if(grid_list_.begin(), grid_list_.end(), |
| RootWindowGridComparator(gained_active->GetRootWindow())); |
| if (grid == grid_list_.end()) |
| return; |
| const std::vector<WindowSelectorItem*> windows = (*grid)->window_list(); |
| |
| ScopedVector<WindowSelectorItem>::const_iterator iter = std::find_if( |
| windows.begin(), windows.end(), |
| WindowSelectorItemTargetComparator(gained_active)); |
| |
| if (iter != windows.end()) |
| (*iter)->RestoreWindowOnExit(gained_active); |
| |
| // Don't restore focus on exit if a window was just activated. |
| ResetFocusRestoreWindow(false); |
| CancelSelection(); |
| } |
| |
| void WindowSelector::OnAttemptToReactivateWindow(aura::Window* request_active, |
| aura::Window* actual_active) { |
| OnWindowActivated(request_active, actual_active); |
| } |
| |
| void WindowSelector::PositionWindows(bool animate) { |
| for (ScopedVector<WindowGrid>::iterator iter = grid_list_.begin(); |
| iter != grid_list_.end(); iter++) { |
| (*iter)->PositionWindows(animate); |
| } |
| } |
| |
| void WindowSelector::HideAndTrackNonOverviewWindows() { |
| // Add the windows to hidden_windows first so that if any are destroyed |
| // while hiding them they are tracked. |
| for (ScopedVector<WindowGrid>::iterator grid_iter = grid_list_.begin(); |
| grid_iter != grid_list_.end(); ++grid_iter) { |
| for (size_t i = 0; i < kSwitchableWindowContainerIdsLength; ++i) { |
| const aura::Window* container = |
| Shell::GetContainer((*grid_iter)->root_window(), |
| kSwitchableWindowContainerIds[i]); |
| for (aura::Window::Windows::const_iterator iter = |
| container->children().begin(); iter != container->children().end(); |
| ++iter) { |
| if (!(*iter)->IsVisible() || (*grid_iter)->Contains(*iter)) |
| continue; |
| hidden_windows_.Add(*iter); |
| } |
| } |
| } |
| |
| // Copy the window list as it can change during iteration. |
| const aura::WindowTracker::Windows hidden_windows(hidden_windows_.windows()); |
| for (aura::WindowTracker::Windows::const_iterator iter = |
| hidden_windows.begin(); iter != hidden_windows.end(); ++iter) { |
| if (!hidden_windows_.Contains(*iter)) |
| continue; |
| ui::ScopedLayerAnimationSettings settings( |
| (*iter)->layer()->GetAnimator()); |
| settings.SetTransitionDuration(base::TimeDelta::FromMilliseconds( |
| ScopedTransformOverviewWindow::kTransitionMilliseconds)); |
| settings.SetPreemptionStrategy( |
| ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET); |
| (*iter)->Hide(); |
| // Hiding the window can result in it being destroyed. |
| if (!hidden_windows_.Contains(*iter)) |
| continue; |
| (*iter)->layer()->SetOpacity(0); |
| } |
| } |
| |
| void WindowSelector::ResetFocusRestoreWindow(bool focus) { |
| if (!restore_focus_window_) |
| return; |
| if (focus) { |
| base::AutoReset<bool> restoring_focus(&ignore_activations_, true); |
| restore_focus_window_->Focus(); |
| } |
| // If the window is in the observed_windows_ list it needs to continue to be |
| // observed. |
| if (observed_windows_.find(restore_focus_window_) == |
| observed_windows_.end()) { |
| restore_focus_window_->RemoveObserver(this); |
| } |
| restore_focus_window_ = NULL; |
| } |
| |
| void WindowSelector::Move(Direction direction) { |
| bool overflowed = grid_list_[selected_grid_index_]->Move(direction); |
| if (overflowed) { |
| // The grid reported that the movement command corresponds to the next |
| // root window, identify it and call Move() on it to initialize the |
| // selection widget. |
| // TODO(nsatragno): If there are more than two monitors, move between grids |
| // in the requested direction. |
| selected_grid_index_ = (selected_grid_index_ + 1) % grid_list_.size(); |
| grid_list_[selected_grid_index_]->Move(direction); |
| } |
| } |
| |
| } // namespace ash |