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/system/tray/actionable_view.h"
   8 #include "ash/system/tray/tray_background_view.h"
   9 #include "ash/system/tray/tray_popup_header_button.h"
  10 #include "ash/wm/window_util.h"
  11 #include "chrome/browser/chromeos/ui/focus_ring_layer.h"
  12 #include "ui/aura/window.h"
  13 #include "ui/views/controls/button/label_button.h"
  14 #include "ui/views/view.h"
  15 #include "ui/views/widget/widget.h"
  16
  17 namespace chromeos {
  18
  19 FocusRingController::FocusRingController()
  20     : visible_(false),
  21       widget_(NULL) {
  22 }
  23
  24 FocusRingController::~FocusRingController() {
  25   SetVisible(false);
  26 }
  27
  28 void FocusRingController::SetVisible(bool visible) {
  29   if (visible_ == visible)
  30     return;
  31
  32   visible_ = visible;
  33
  34   if (visible_) {
  35     views::WidgetFocusManager::GetInstance()->AddFocusChangeListener(this);
  36     aura::Window* active_window = ash::wm::GetActiveWindow();
  37     if (active_window)
  38       SetWidget(views::Widget::GetWidgetForNativeWindow(active_window));
  39   } else {
  40     views::WidgetFocusManager::GetInstance()->RemoveFocusChangeListener(this);
  41     SetWidget(NULL);
  42   }
  43 }
  44
  45 void FocusRingController::UpdateFocusRing() {
  46   views::View* view = NULL;
  47   if (widget_ && widget_->GetFocusManager())
  48     view = widget_->GetFocusManager()->GetFocusedView();
  49
  50   // No focus ring if no focused view or the focused view covers the whole
  51   // widget content area (such as RenderWidgetHostWidgetAura).
  52   if (!view ||
  53       view->ConvertRectToWidget(view->bounds()) ==
  54           widget_->GetContentsView()->bounds()) {
  55     focus_ring_layer_.reset();
  56     return;
  57   }
  58
  59   gfx::Rect view_bounds = view->GetContentsBounds();
  60
  61   // Workarounds that attempts to pick a better bounds.
  62   if (view->GetClassName() == views::LabelButton::kViewClassName) {
  63     view_bounds = view->GetLocalBounds();
  64     view_bounds.Inset(2, 2, 2, 2);
  65   }
  66
  67   // Workarounds for system tray items that have customized focus borders.  The
  68   // insets here must be consistent with the ones used by those classes.
  69   if (view->GetClassName() == ash::ActionableView::kViewClassName) {
  70     view_bounds = view->GetLocalBounds();
  71     view_bounds.Inset(1, 1, 3, 3);
  72   } else if (view->GetClassName() == ash::TrayBackgroundView::kViewClassName) {
  73     view_bounds.Inset(1, 1, 3, 3);
  74   } else if (view->GetClassName() ==
  75              ash::TrayPopupHeaderButton::kViewClassName) {
  76     view_bounds = view->GetLocalBounds();
  77     view_bounds.Inset(2, 1, 2, 2);
  78   }
  79
  80   // Convert view bounds to widget/window coordinates.
  81   view_bounds = view->ConvertRectToWidget(view_bounds);
  82
  83   // Translate window coordinates to root window coordinates.
  84   DCHECK(view->GetWidget());
  85   aura::Window* window = view->GetWidget()->GetNativeWindow();
  86   aura::Window* root_window = window->GetRootWindow();
  87   gfx::Point origin = view_bounds.origin();
  88   aura::Window::ConvertPointToTarget(window, root_window, &origin);
  89   view_bounds.set_origin(origin);
  90
  91   // Update the focus ring layer.
  92   if (!focus_ring_layer_)
  93     focus_ring_layer_.reset(new FocusRingLayer(this));
  94   focus_ring_layer_->Set(root_window, view_bounds);
  95 }
  96
  97 void FocusRingController::OnDeviceScaleFactorChanged() {
  98   UpdateFocusRing();
  99 }
 100
 101 void FocusRingController::SetWidget(views::Widget* widget) {
 102   if (widget_) {
 103     widget_->RemoveObserver(this);
 104     if (widget_->GetFocusManager())
 105       widget_->GetFocusManager()->RemoveFocusChangeListener(this);
 106   }
 107
 108   widget_ = widget;
 109
 110   if (widget_) {
 111     widget_->AddObserver(this);
 112     if (widget_->GetFocusManager())
 113       widget_->GetFocusManager()->AddFocusChangeListener(this);
 114   }
 115
 116   UpdateFocusRing();
 117 }
 118
 119 void FocusRingController::OnWidgetDestroying(views::Widget* widget) {
 120   DCHECK_EQ(widget_, widget);
 121   SetWidget(NULL);
 122 }
 123
 124 void FocusRingController::OnWidgetBoundsChanged(views::Widget* widget,
 125                                                 const gfx::Rect& new_bounds) {
 126   DCHECK_EQ(widget_, widget);
 127   UpdateFocusRing();
 128 }
 129
 130 void FocusRingController::OnNativeFocusChange(gfx::NativeView focused_before,
 131                                               gfx::NativeView focused_now) {
 132   views::Widget* widget =
 133       focused_now ? views::Widget::GetWidgetForNativeWindow(focused_now) : NULL;
 134   SetWidget(widget);
 135 }
 136
 137 void FocusRingController::OnWillChangeFocus(views::View* focused_before,
 138                                             views::View* focused_now) {
 139 }
 140
 141 void FocusRingController::OnDidChangeFocus(views::View* focused_before,
 142                                            views::View* focused_now) {
 143   DCHECK_EQ(focused_now, widget_->GetFocusManager()->GetFocusedView());
 144   UpdateFocusRing();
 145 }
 146
 147 }  // namespace chromeos