1// Copyright 2013 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 "chrome/browser/chromeos/ui/focus_ring_controller.h"
6
7#include "ash/wm/window_util.h"
8#include "chrome/browser/chromeos/ui/focus_ring_layer.h"
9#include "ui/views/widget/widget.h"
10
11namespace chromeos {
12
13FocusRingController::FocusRingController()
14    : visible_(false),
15      widget_(NULL) {
16}
17
18FocusRingController::~FocusRingController() {
19  SetVisible(false);
20}
21
22void FocusRingController::SetVisible(bool visible) {
23  if (visible_ == visible)
24    return;
25
26  visible_ = visible;
27
28  if (visible_) {
29    views::WidgetFocusManager::GetInstance()->AddFocusChangeListener(this);
30    aura::Window* active_window = ash::wm::GetActiveWindow();
31    if (active_window)
32      SetWidget(views::Widget::GetWidgetForNativeWindow(active_window));
33  } else {
34    views::WidgetFocusManager::GetInstance()->RemoveFocusChangeListener(this);
35    SetWidget(NULL);
36  }
37}
38
39void FocusRingController::UpdateFocusRing() {
40  views::View* focused_view = NULL;
41  if (widget_ && widget_->GetFocusManager())
42    focused_view = widget_->GetFocusManager()->GetFocusedView();
43
44  // No focus ring if no focused view or the focused view covers the whole
45  // widget content area (such as RenderWidgetHostWidgetAura).
46  if (!focused_view ||
47      focused_view->ConvertRectToWidget(focused_view->bounds()) ==
48          widget_->GetContentsView()->bounds()) {
49    focus_ring_layer_.reset();
50    return;
51  }
52
53  if (!focus_ring_layer_)
54    focus_ring_layer_.reset(new FocusRingLayer);
55
56  focus_ring_layer_->SetForView(focused_view);
57}
58
59void FocusRingController::SetWidget(views::Widget* widget) {
60  if (widget_) {
61    widget_->RemoveObserver(this);
62    if (widget_->GetFocusManager())
63      widget_->GetFocusManager()->RemoveFocusChangeListener(this);
64  }
65
66  widget_ = widget;
67
68  if (widget_) {
69    widget_->AddObserver(this);
70    if (widget_->GetFocusManager())
71      widget_->GetFocusManager()->AddFocusChangeListener(this);
72  }
73
74  UpdateFocusRing();
75}
76
77void FocusRingController::OnWidgetDestroying(views::Widget* widget) {
78  DCHECK_EQ(widget_, widget);
79  SetWidget(NULL);
80}
81
82void FocusRingController::OnWidgetBoundsChanged(views::Widget* widget,
83                                                const gfx::Rect& new_bounds) {
84  DCHECK_EQ(widget_, widget);
85  UpdateFocusRing();
86}
87
88void FocusRingController::OnNativeFocusChange(gfx::NativeView focused_before,
89                                              gfx::NativeView focused_now) {
90  views::Widget* widget =
91      focused_now ? views::Widget::GetWidgetForNativeWindow(focused_now) : NULL;
92  SetWidget(widget);
93}
94
95void FocusRingController::OnWillChangeFocus(views::View* focused_before,
96                                            views::View* focused_now) {
97}
98
99void FocusRingController::OnDidChangeFocus(views::View* focused_before,
100                                           views::View* focused_now) {
101  DCHECK_EQ(focused_now, widget_->GetFocusManager()->GetFocusedView());
102  UpdateFocusRing();
103}
104
105}  // namespace chromeos
106