src/chrome/browser/chromeos/ui/focus_ring_controller.cc

   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
  11 namespace chromeos {
  12
  13 FocusRingController::FocusRingController()
  14     : visible_(false),
  15       widget_(NULL) {
  16 }
  17
  18 FocusRingController::~FocusRingController() {
  19   SetVisible(false);
  20 }
  21
  22 void 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
  39 void 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
  59 void 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
  77 void FocusRingController::OnWidgetDestroying(views::Widget* widget) {
  78   DCHECK_EQ(widget_, widget);
  79   SetWidget(NULL);
  80 }
  81
  82 void FocusRingController::OnWidgetBoundsChanged(views::Widget* widget,
  83                                                 const gfx::Rect& new_bounds) {
  84   DCHECK_EQ(widget_, widget);
  85   UpdateFocusRing();
  86 }
  87
  88 void 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
  95 void FocusRingController::OnWillChangeFocus(views::View* focused_before,
  96                                             views::View* focused_now) {
  97 }
  98
  99 void 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