1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ash/focus_cycler.h" 6 7 #include "ash/shell.h" 8 #include "ash/wm/mru_window_tracker.h" 9 #include "ash/wm/window_state.h" 10 #include "ash/wm/window_util.h" 11 #include "ui/aura/window.h" 12 #include "ui/views/accessible_pane_view.h" 13 #include "ui/views/focus/focus_search.h" 14 #include "ui/views/widget/widget.h" 15 #include "ui/wm/public/activation_client.h" 16 17 namespace ash { 18 19 namespace { 20 HasFocusableWindow()21bool HasFocusableWindow() { 22 return !MruWindowTracker::BuildWindowList(false).empty(); 23 } 24 25 } // namespace 26 FocusCycler()27FocusCycler::FocusCycler() : widget_activating_(NULL) { 28 } 29 ~FocusCycler()30FocusCycler::~FocusCycler() { 31 } 32 AddWidget(views::Widget * widget)33void FocusCycler::AddWidget(views::Widget* widget) { 34 widgets_.push_back(widget); 35 } 36 RotateFocus(Direction direction)37void FocusCycler::RotateFocus(Direction direction) { 38 aura::Window* window = ash::wm::GetActiveWindow(); 39 if (window) { 40 views::Widget* widget = views::Widget::GetWidgetForNativeWindow(window); 41 // First try to rotate focus within the active widget. If that succeeds, 42 // we're done. 43 if (widget && widget->GetFocusManager()->RotatePaneFocus( 44 direction == BACKWARD ? 45 views::FocusManager::kBackward : views::FocusManager::kForward, 46 views::FocusManager::kNoWrap)) { 47 return; 48 } 49 } 50 51 const bool has_window = HasFocusableWindow(); 52 int index = 0; 53 int count = static_cast<int>(widgets_.size()); 54 int browser_index = has_window ? count : -1; 55 56 for (; index < count; ++index) { 57 if (widgets_[index]->IsActive()) 58 break; 59 } 60 61 int start_index = index; 62 63 if (has_window) 64 ++count; 65 66 for (;;) { 67 if (direction == FORWARD) 68 index = (index + 1) % count; 69 else 70 index = ((index - 1) + count) % count; 71 72 // Ensure that we don't loop more than once. 73 if (index == start_index) 74 break; 75 76 if (index == browser_index) { 77 // Activate the most recently active browser window. 78 MruWindowTracker::WindowList mru_windows( 79 Shell::GetInstance()->mru_window_tracker()->BuildMruWindowList()); 80 if (mru_windows.empty()) 81 break; 82 aura::Window* window = mru_windows.front(); 83 wm::GetWindowState(window)->Activate(); 84 views::Widget* widget = views::Widget::GetWidgetForNativeWindow(window); 85 if (!widget) 86 break; 87 views::FocusManager* focus_manager = widget->GetFocusManager(); 88 focus_manager->ClearFocus(); 89 focus_manager->RotatePaneFocus( 90 direction == BACKWARD ? 91 views::FocusManager::kBackward : views::FocusManager::kForward, 92 views::FocusManager::kWrap); 93 break; 94 } else { 95 if (FocusWidget(widgets_[index])) 96 break; 97 } 98 } 99 } 100 FocusWidget(views::Widget * widget)101bool FocusCycler::FocusWidget(views::Widget* widget) { 102 // Note: It is not necessary to set the focus directly to the pane since that 103 // will be taken care of by the widget activation. 104 widget_activating_ = widget; 105 widget->Activate(); 106 widget_activating_ = NULL; 107 return widget->IsActive(); 108 } 109 110 } // namespace ash 111