| // 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/aura/window.h" |
| #include "ui/views/accessible_pane_view.h" |
| #include "ui/views/focus/focus_search.h" |
| #include "ui/views/widget/widget.h" |
| #include "ui/wm/public/activation_client.h" |
| |
| namespace ash { |
| |
| namespace { |
| |
| bool HasFocusableWindow() { |
| return !MruWindowTracker::BuildWindowList(false).empty(); |
| } |
| |
| } // namespace |
| |
| FocusCycler::FocusCycler() : widget_activating_(NULL) { |
| } |
| |
| FocusCycler::~FocusCycler() { |
| } |
| |
| void FocusCycler::AddWidget(views::Widget* widget) { |
| widgets_.push_back(widget); |
| } |
| |
| void FocusCycler::RotateFocus(Direction direction) { |
| aura::Window* window = ash::wm::GetActiveWindow(); |
| if (window) { |
| views::Widget* widget = views::Widget::GetWidgetForNativeWindow(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::kBackward : views::FocusManager::kForward, |
| views::FocusManager::kNoWrap)) { |
| 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::GetInstance()->mru_window_tracker()->BuildMruWindowList()); |
| if (mru_windows.empty()) |
| break; |
| aura::Window* window = mru_windows.front(); |
| wm::GetWindowState(window)->Activate(); |
| views::Widget* widget = views::Widget::GetWidgetForNativeWindow(window); |
| if (!widget) |
| break; |
| views::FocusManager* focus_manager = widget->GetFocusManager(); |
| focus_manager->ClearFocus(); |
| focus_manager->RotatePaneFocus( |
| direction == BACKWARD ? |
| views::FocusManager::kBackward : views::FocusManager::kForward, |
| views::FocusManager::kWrap); |
| break; |
| } else { |
| if (FocusWidget(widgets_[index])) |
| break; |
| } |
| } |
| } |
| |
| bool FocusCycler::FocusWidget(views::Widget* widget) { |
| // 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(); |
| } |
| |
| } // namespace ash |