chrome/browser/chromeos/ui/idle_app_name_notification_view.cc

   1 // Copyright 2014 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/idle_app_name_notification_view.h"
   6
   7 #include <string>
   8
   9 #include "ash/shell.h"
  10 #include "ash/shell_delegate.h"
  11 #include "ash/shell_window_ids.h"
  12 #include "ash/wm/window_animations.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/time/time.h"
  16 #include "base/timer/timer.h"
  17 #include "extensions/common/extension.h"
  18 #include "grit/generated_resources.h"
  19 #include "ui/accessibility/ax_view_state.h"
  20 #include "ui/aura/window.h"
  21 #include "ui/base/l10n/l10n_util.h"
  22 #include "ui/base/resource/resource_bundle.h"
  23 #include "ui/compositor/layer_animation_observer.h"
  24 #include "ui/compositor/scoped_layer_animation_settings.h"
  25 #include "ui/gfx/canvas.h"
  26 #include "ui/gfx/font_list.h"
  27 #include "ui/gfx/text_utils.h"
  28 #include "ui/views/controls/label.h"
  29 #include "ui/views/layout/box_layout.h"
  30 #include "ui/views/layout/fill_layout.h"
  31 #include "ui/views/view.h"
  32 #include "ui/views/widget/widget.h"
  33 #include "ui/views/widget/widget_delegate.h"
  34
  35 namespace ui {
  36 class LayerAnimationSequence;
  37 }
  38
  39 namespace chromeos {
  40 namespace {
  41
  42 // Color of the text of the warning message.
  43 const SkColor kTextColor = SK_ColorBLACK;
  44
  45 // Color of the text of the warning message.
  46 const SkColor kErrorTextColor = SK_ColorRED;
  47
  48 // Color of the window background.
  49 const SkColor kWindowBackgroundColor = SK_ColorWHITE;
  50
  51 // Radius of the rounded corners of the window.
  52 const int kWindowCornerRadius = 4;
  53
  54 // Creates and shows the message widget for |view| with |animation_time_ms|.
  55 void CreateAndShowWidgetWithContent(views::WidgetDelegate* delegate,
  56                                     views::View* view,
  57                                     int animation_time_ms) {
  58   aura::Window* root_window = ash::Shell::GetTargetRootWindow();
  59   gfx::Size rs = root_window->bounds().size();
  60   gfx::Size ps = view->GetPreferredSize();
  61   gfx::Rect bounds((rs.width() - ps.width()) / 2,
  62                    -ps.height(),
  63                    ps.width(),
  64                    ps.height());
  65   views::Widget::InitParams params;
  66   params.type = views::Widget::InitParams::TYPE_POPUP;
  67   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
  68   params.ownership = views::Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET;
  69   params.accept_events = false;
  70   params.can_activate = false;
  71   params.keep_on_top = true;
  72   params.remove_standard_frame = true;
  73   params.delegate = delegate;
  74   params.bounds = bounds;
  75   params.parent = ash::Shell::GetContainer(
  76       root_window, ash::kShellWindowId_SettingBubbleContainer);
  77   views::Widget* widget = new views::Widget;
  78   widget->Init(params);
  79   widget->SetContentsView(view);
  80   gfx::NativeView native_view = widget->GetNativeView();
  81   native_view->SetName("KioskIdleAppNameNotification");
  82
  83   // Note: We cannot use the Window show/hide animations since they are disabled
  84   // for kiosk by command line.
  85   ui::LayerAnimator* animator = new ui::LayerAnimator(
  86           base::TimeDelta::FromMilliseconds(animation_time_ms));
  87   native_view->layer()->SetAnimator(animator);
  88   widget->Show();
  89
  90   // We don't care about the show animation since it is off screen, so stop the
  91   // started animation and move the message into view.
  92   animator->StopAnimating();
  93   bounds.set_y((rs.height() - ps.height()) / 20);
  94   widget->SetBounds(bounds);
  95
  96   // Allow to use the message for spoken feedback.
  97   view->NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
  98 }
  99
 100 }  // namespace
 101
 102 // The class which implements the content view for the message.
 103 class IdleAppNameNotificationDelegateView
 104     : public views::WidgetDelegateView,
 105       public ui::ImplicitAnimationObserver {
 106  public:
 107   // An idle message which will get shown from the caller and hides itself after
 108   // a time, calling |owner->CloseMessage| to inform the owner that it got
 109   // destroyed. The |app_name| is a string which gets used as message and
 110   // |error| is true if something is not correct.
 111   // |message_visibility_time_in_ms| ms's after creation the message will start
 112   // to remove itself from the screen.
 113   IdleAppNameNotificationDelegateView(IdleAppNameNotificationView *owner,
 114                                       const base::string16& app_name,
 115                                       bool error,
 116                                       int message_visibility_time_in_ms)
 117       : owner_(owner),
 118         widget_closed_(false) {
 119     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 120     // Add the application name label to the message.
 121     AddLabel(app_name,
 122              rb.GetFontList(ui::ResourceBundle::BoldFont),
 123              error ? kErrorTextColor : kTextColor);
 124     spoken_text_ = app_name;
 125     SetLayoutManager(new views::FillLayout);
 126
 127     // Set a timer which will trigger to remove the message after the given
 128     // time.
 129     hide_timer_.Start(
 130         FROM_HERE,
 131         base::TimeDelta::FromMilliseconds(message_visibility_time_in_ms),
 132         this,
 133         &IdleAppNameNotificationDelegateView::RemoveMessage);
 134   }
 135
 136   virtual ~IdleAppNameNotificationDelegateView() {
 137     // The widget is already closing, but the other cleanup items need to be
 138     // performed.
 139     widget_closed_ = true;
 140     Close();
 141   }
 142
 143   // Close the widget immediately. This can be called from the owner or from
 144   // this class.
 145   void Close() {
 146     // Stop the timer (if it was running).
 147     hide_timer_.Stop();
 148     // Inform our owner that we are going away.
 149     if (owner_) {
 150       IdleAppNameNotificationView* owner = owner_;
 151       owner_ = NULL;
 152       owner->CloseMessage();
 153     }
 154     // Close the owning widget - if required.
 155     if (!widget_closed_) {
 156       widget_closed_ = true;
 157       GetWidget()->Close();
 158     }
 159   }
 160
 161   // Animate the window away (and close once done).
 162   void RemoveMessage() {
 163     aura::Window* widget_view = GetWidget()->GetNativeView();
 164     ui::Layer* layer = widget_view->layer();
 165     ui::ScopedLayerAnimationSettings settings(layer->GetAnimator());
 166     settings.AddObserver(this);
 167     gfx::Rect rect = widget_view->bounds();
 168     rect.set_y(-GetPreferredSize().height());
 169     layer->SetBounds(rect);
 170   }
 171
 172   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
 173     SkPaint paint;
 174     paint.setStyle(SkPaint::kFill_Style);
 175     paint.setColor(kWindowBackgroundColor);
 176     canvas->DrawRoundRect(GetLocalBounds(), kWindowCornerRadius, paint);
 177     views::WidgetDelegateView::OnPaint(canvas);
 178   }
 179
 180   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE {
 181     state->name = spoken_text_;
 182     state->role = ui::AX_ROLE_ALERT;
 183   }
 184
 185   // ImplicitAnimationObserver overrides
 186   virtual void OnImplicitAnimationsCompleted() OVERRIDE {
 187     Close();
 188   }
 189
 190  private:
 191   // Adds the label to the view, using |text| with a |font| and a |text_color|.
 192   void AddLabel(const base::string16& text,
 193                 const gfx::FontList& font,
 194                 SkColor text_color) {
 195     views::Label* label = new views::Label;
 196     label->SetText(text);
 197     label->SetHorizontalAlignment(gfx::ALIGN_CENTER);
 198     label->SetFontList(font);
 199     label->SetEnabledColor(text_color);
 200     label->SetDisabledColor(text_color);
 201     label->SetAutoColorReadabilityEnabled(false);
 202     AddChildView(label);
 203   }
 204
 205   // A timer which calls us to remove the message from the screen.
 206   base::OneShotTimer<IdleAppNameNotificationDelegateView> hide_timer_;
 207
 208   // The owner of this message which needs to get notified when the message
 209   // closes.
 210   IdleAppNameNotificationView* owner_;
 211
 212   // The spoken text.
 213   base::string16 spoken_text_;
 214
 215   // True if the widget got already closed.
 216   bool widget_closed_;
 217
 218   DISALLOW_COPY_AND_ASSIGN(IdleAppNameNotificationDelegateView);
 219 };
 220
 221 IdleAppNameNotificationView::IdleAppNameNotificationView(
 222     int message_visibility_time_in_ms,
 223     int animation_time_ms,
 224     const extensions::Extension* extension)
 225     : view_(NULL) {
 226   ShowMessage(message_visibility_time_in_ms, animation_time_ms, extension);
 227 }
 228
 229 IdleAppNameNotificationView::~IdleAppNameNotificationView() {
 230   CloseMessage();
 231 }
 232
 233 void IdleAppNameNotificationView::CloseMessage() {
 234   if (view_) {
 235     IdleAppNameNotificationDelegateView* view = view_;
 236     view_ = NULL;
 237     view->Close();
 238   }
 239 }
 240
 241 bool IdleAppNameNotificationView::IsVisible() {
 242   return view_ != NULL;
 243 }
 244
 245 base::string16 IdleAppNameNotificationView::GetShownTextForTest() {
 246   ui::AXViewState state;
 247   DCHECK(view_);
 248   view_->GetAccessibleState(&state);
 249   return state.name;
 250 }
 251
 252 void IdleAppNameNotificationView::ShowMessage(
 253     int message_visibility_time_in_ms,
 254     int animation_time_ms,
 255     const extensions::Extension* extension) {
 256   DCHECK(!view_);
 257
 258   base::string16 app_name;
 259   bool error = false;
 260   if (extension &&
 261       !base::ContainsOnlyChars(extension->name(), base::kWhitespaceASCII)) {
 262     app_name = base::UTF8ToUTF16(extension->name());
 263   } else {
 264     error = true;
 265     app_name = l10n_util::GetStringUTF16(
 266         IDS_IDLE_APP_NAME_UNKNOWN_APPLICATION_NOTIFICATION);
 267   }
 268
 269   view_ = new IdleAppNameNotificationDelegateView(
 270       this,
 271       app_name,
 272       error,
 273       message_visibility_time_in_ms + animation_time_ms);
 274   CreateAndShowWidgetWithContent(view_, view_, animation_time_ms);
 275 }
 276
 277 }  // namespace chromeos