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- // Copyright (c) 2012 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/focus_cycler.h"
- #include "ash/shell.h"
- #include "ash/wm/mru_window_tracker.h"
- #include "ash/wm/window_state.h"
- #include "ash/wm/window_util.h"
- #include "ui/views/accessible_pane_view.h"
- #include "ui/views/focus/focus_search.h"
- #include "ui/views/widget/widget.h"
- #include "ui/views/widget/widget_delegate.h"
- #include "ui/wm/public/activation_client.h"
- namespace ash {
- namespace {
- bool HasFocusableWindow() {
- return !Shell::Get()
- ->mru_window_tracker()
- ->BuildMruWindowList(kActiveDesk)
- .empty();
- }
- } // namespace
- FocusCycler::FocusCycler() : widget_activating_(nullptr) {}
- FocusCycler::~FocusCycler() = default;
- void FocusCycler::AddWidget(views::Widget* widget) {
- widgets_.push_back(widget);
- }
- void FocusCycler::RemoveWidget(views::Widget* widget) {
- auto iter = std::find(widgets_.begin(), widgets_.end(), widget);
- if (iter != widgets_.end())
- widgets_.erase(iter);
- }
- void FocusCycler::RotateFocus(Direction direction) {
- aura::Window* window = window_util::GetActiveWindow();
- if (window) {
- views::Widget* widget = views::Widget::GetWidgetForNativeView(window);
- // First try to rotate focus within the active widget. If that succeeds,
- // we're done.
- if (widget &&
- widget->GetFocusManager()->RotatePaneFocus(
- direction == BACKWARD ? views::FocusManager::Direction::kBackward
- : views::FocusManager::Direction::kForward,
- views::FocusManager::FocusCycleWrapping::kDisabled)) {
- return;
- }
- }
- const bool has_window = HasFocusableWindow();
- int index = 0;
- int count = static_cast<int>(widgets_.size());
- int browser_index = has_window ? count : -1;
- for (; index < count; ++index) {
- if (widgets_[index]->IsActive())
- break;
- }
- int start_index = index;
- if (has_window)
- ++count;
- for (;;) {
- if (direction == FORWARD)
- index = (index + 1) % count;
- else
- index = ((index - 1) + count) % count;
- // Ensure that we don't loop more than once.
- if (index == start_index)
- break;
- if (index == browser_index) {
- // Activate the most recently active browser window.
- MruWindowTracker::WindowList mru_windows(
- Shell::Get()->mru_window_tracker()->BuildMruWindowList(kActiveDesk));
- if (mru_windows.empty())
- break;
- auto* window = mru_windows.front();
- WindowState::Get(window)->Activate();
- views::Widget* widget = views::Widget::GetWidgetForNativeView(window);
- if (!widget)
- break;
- views::FocusManager* focus_manager = widget->GetFocusManager();
- focus_manager->ClearFocus();
- focus_manager->RotatePaneFocus(
- direction == BACKWARD ? views::FocusManager::Direction::kBackward
- : views::FocusManager::Direction::kForward,
- views::FocusManager::FocusCycleWrapping::kEnabled);
- break;
- } else {
- if (FocusWidget(widgets_[index]))
- break;
- }
- }
- }
- bool FocusCycler::FocusWidget(views::Widget* widget) {
- // If the target is PIP window, temporarily make it activatable.
- if (WindowState::Get(widget->GetNativeWindow())->IsPip())
- widget->widget_delegate()->SetCanActivate(true);
- // Note: It is not necessary to set the focus directly to the pane since that
- // will be taken care of by the widget activation.
- widget_activating_ = widget;
- widget->Activate();
- widget_activating_ = NULL;
- return widget->IsActive();
- }
- views::Widget* FocusCycler::FindWidget(
- base::RepeatingCallback<bool(views::Widget*)> callback) {
- for (auto* widget : widgets_) {
- if (callback.Run(widget))
- return widget;
- }
- return nullptr;
- }
- } // namespace ash
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