src/ui/views/widget/desktop_aura/desktop_native_widget_aura.cc

   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 "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
   6
   7 #include "base/bind.h"
   8 #include "base/debug/trace_event.h"
   9 #include "ui/aura/client/aura_constants.h"
  10 #include "ui/aura/client/cursor_client.h"
  11 #include "ui/aura/client/focus_client.h"
  12 #include "ui/aura/client/window_tree_client.h"
  13 #include "ui/aura/window.h"
  14 #include "ui/aura/window_observer.h"
  15 #include "ui/aura/window_property.h"
  16 #include "ui/aura/window_tree_host.h"
  17 #include "ui/base/hit_test.h"
  18 #include "ui/base/ui_base_switches_util.h"
  19 #include "ui/compositor/layer.h"
  20 #include "ui/gfx/canvas.h"
  21 #include "ui/gfx/display.h"
  22 #include "ui/gfx/point_conversions.h"
  23 #include "ui/gfx/screen.h"
  24 #include "ui/gfx/size_conversions.h"
  25 #include "ui/native_theme/native_theme.h"
  26 #include "ui/views/corewm/tooltip.h"
  27 #include "ui/views/corewm/tooltip_controller.h"
  28 #include "ui/views/drag_utils.h"
  29 #include "ui/views/ime/input_method_bridge.h"
  30 #include "ui/views/ime/null_input_method.h"
  31 #include "ui/views/view_constants_aura.h"
  32 #include "ui/views/widget/desktop_aura/desktop_capture_client.h"
  33 #include "ui/views/widget/desktop_aura/desktop_cursor_loader_updater.h"
  34 #include "ui/views/widget/desktop_aura/desktop_dispatcher_client.h"
  35 #include "ui/views/widget/desktop_aura/desktop_event_client.h"
  36 #include "ui/views/widget/desktop_aura/desktop_focus_rules.h"
  37 #include "ui/views/widget/desktop_aura/desktop_native_cursor_manager.h"
  38 #include "ui/views/widget/desktop_aura/desktop_screen_position_client.h"
  39 #include "ui/views/widget/desktop_aura/desktop_window_tree_host.h"
  40 #include "ui/views/widget/drop_helper.h"
  41 #include "ui/views/widget/native_widget_aura.h"
  42 #include "ui/views/widget/root_view.h"
  43 #include "ui/views/widget/tooltip_manager_aura.h"
  44 #include "ui/views/widget/widget.h"
  45 #include "ui/views/widget/widget_aura_utils.h"
  46 #include "ui/views/widget/widget_delegate.h"
  47 #include "ui/views/widget/window_reorderer.h"
  48 #include "ui/views/window/native_frame_view.h"
  49 #include "ui/wm/core/compound_event_filter.h"
  50 #include "ui/wm/core/cursor_manager.h"
  51 #include "ui/wm/core/focus_controller.h"
  52 #include "ui/wm/core/input_method_event_filter.h"
  53 #include "ui/wm/core/native_cursor_manager.h"
  54 #include "ui/wm/core/shadow_controller.h"
  55 #include "ui/wm/core/shadow_types.h"
  56 #include "ui/wm/core/visibility_controller.h"
  57 #include "ui/wm/core/window_modality_controller.h"
  58 #include "ui/wm/public/activation_client.h"
  59 #include "ui/wm/public/drag_drop_client.h"
  60
  61 #if defined(OS_WIN)
  62 #include "ui/base/win/shell.h"
  63 #include "ui/gfx/win/dpi.h"
  64 #endif
  65
  66 DECLARE_EXPORTED_WINDOW_PROPERTY_TYPE(VIEWS_EXPORT,
  67                                       views::DesktopNativeWidgetAura*);
  68
  69 namespace views {
  70
  71 DEFINE_WINDOW_PROPERTY_KEY(DesktopNativeWidgetAura*,
  72                            kDesktopNativeWidgetAuraKey, NULL);
  73
  74 namespace {
  75
  76 // This class provides functionality to create a top level widget to host a
  77 // child window.
  78 class DesktopNativeWidgetTopLevelHandler : public aura::WindowObserver {
  79  public:
  80   // This function creates a widget with the bounds passed in which eventually
  81   // becomes the parent of the child window passed in.
  82   static aura::Window* CreateParentWindow(aura::Window* child_window,
  83                                           const gfx::Rect& bounds,
  84                                           bool full_screen,
  85                                           bool root_is_always_on_top) {
  86     // This instance will get deleted when the widget is destroyed.
  87     DesktopNativeWidgetTopLevelHandler* top_level_handler =
  88         new DesktopNativeWidgetTopLevelHandler;
  89
  90     child_window->SetBounds(gfx::Rect(bounds.size()));
  91
  92     Widget::InitParams init_params;
  93     init_params.type = full_screen ? Widget::InitParams::TYPE_WINDOW :
  94         Widget::InitParams::TYPE_POPUP;
  95     init_params.bounds = bounds;
  96     init_params.ownership = Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET;
  97     init_params.layer_type = aura::WINDOW_LAYER_NOT_DRAWN;
  98     init_params.activatable = full_screen ?
  99         Widget::InitParams::ACTIVATABLE_YES :
 100         Widget::InitParams::ACTIVATABLE_NO;
 101     init_params.keep_on_top = root_is_always_on_top;
 102
 103     // This widget instance will get deleted when the window is
 104     // destroyed.
 105     top_level_handler->top_level_widget_ = new Widget();
 106     top_level_handler->top_level_widget_->Init(init_params);
 107
 108     top_level_handler->top_level_widget_->SetFullscreen(full_screen);
 109     top_level_handler->top_level_widget_->Show();
 110
 111     aura::Window* native_window =
 112         top_level_handler->top_level_widget_->GetNativeView();
 113     child_window->AddObserver(top_level_handler);
 114     native_window->AddObserver(top_level_handler);
 115     top_level_handler->child_window_ = child_window;
 116     return native_window;
 117   }
 118
 119   // aura::WindowObserver overrides
 120   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {
 121     window->RemoveObserver(this);
 122
 123     // If the widget is being destroyed by the OS then we should not try and
 124     // destroy it again.
 125     if (top_level_widget_ &&
 126         window == top_level_widget_->GetNativeView()) {
 127       top_level_widget_ = NULL;
 128       return;
 129     }
 130
 131     if (top_level_widget_) {
 132       DCHECK(top_level_widget_->GetNativeView());
 133       top_level_widget_->GetNativeView()->RemoveObserver(this);
 134       // When we receive a notification that the child of the window created
 135       // above is being destroyed we go ahead and initiate the destruction of
 136       // the corresponding widget.
 137       top_level_widget_->Close();
 138       top_level_widget_ = NULL;
 139     }
 140     delete this;
 141   }
 142
 143   virtual void OnWindowBoundsChanged(aura::Window* window,
 144                                      const gfx::Rect& old_bounds,
 145                                      const gfx::Rect& new_bounds) OVERRIDE {
 146     if (top_level_widget_ && window == child_window_)
 147       top_level_widget_->SetSize(new_bounds.size());
 148   }
 149
 150  private:
 151   DesktopNativeWidgetTopLevelHandler()
 152       : top_level_widget_(NULL),
 153         child_window_(NULL) {}
 154
 155   virtual ~DesktopNativeWidgetTopLevelHandler() {}
 156
 157   Widget* top_level_widget_;
 158   aura::Window* child_window_;
 159
 160   DISALLOW_COPY_AND_ASSIGN(DesktopNativeWidgetTopLevelHandler);
 161 };
 162
 163 class DesktopNativeWidgetAuraWindowTreeClient :
 164     public aura::client::WindowTreeClient {
 165  public:
 166   explicit DesktopNativeWidgetAuraWindowTreeClient(
 167       aura::Window* root_window)
 168       : root_window_(root_window) {
 169     aura::client::SetWindowTreeClient(root_window_, this);
 170   }
 171   virtual ~DesktopNativeWidgetAuraWindowTreeClient() {
 172     aura::client::SetWindowTreeClient(root_window_, NULL);
 173   }
 174
 175   // Overridden from client::WindowTreeClient:
 176   virtual aura::Window* GetDefaultParent(aura::Window* context,
 177                                          aura::Window* window,
 178                                          const gfx::Rect& bounds) OVERRIDE {
 179     bool is_fullscreen = window->GetProperty(aura::client::kShowStateKey) ==
 180         ui::SHOW_STATE_FULLSCREEN;
 181     bool is_menu = window->type() == ui::wm::WINDOW_TYPE_MENU;
 182
 183     if (is_fullscreen || is_menu) {
 184       bool root_is_always_on_top = false;
 185       internal::NativeWidgetPrivate* native_widget =
 186           DesktopNativeWidgetAura::ForWindow(root_window_);
 187       if (native_widget)
 188         root_is_always_on_top = native_widget->IsAlwaysOnTop();
 189
 190       return DesktopNativeWidgetTopLevelHandler::CreateParentWindow(
 191           window, bounds, is_fullscreen, root_is_always_on_top);
 192     }
 193     return root_window_;
 194   }
 195
 196  private:
 197   aura::Window* root_window_;
 198
 199   DISALLOW_COPY_AND_ASSIGN(DesktopNativeWidgetAuraWindowTreeClient);
 200 };
 201
 202 }  // namespace
 203
 204 class FocusManagerEventHandler : public ui::EventHandler {
 205  public:
 206   FocusManagerEventHandler(DesktopNativeWidgetAura* desktop_native_widget_aura)
 207       : desktop_native_widget_aura_(desktop_native_widget_aura) {}
 208
 209   // Implementation of ui::EventHandler:
 210   virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE {
 211     Widget* widget = desktop_native_widget_aura_->GetWidget();
 212     if (widget && widget->GetFocusManager()->GetFocusedView() &&
 213         !widget->GetFocusManager()->OnKeyEvent(*event)) {
 214       event->SetHandled();
 215     }
 216   }
 217
 218  private:
 219   DesktopNativeWidgetAura* desktop_native_widget_aura_;
 220
 221   DISALLOW_COPY_AND_ASSIGN(FocusManagerEventHandler);
 222 };
 223
 224 class RootWindowDestructionObserver : public aura::WindowObserver {
 225  public:
 226   explicit RootWindowDestructionObserver(DesktopNativeWidgetAura* parent)
 227     : parent_(parent) {}
 228   virtual ~RootWindowDestructionObserver() {}
 229
 230  private:
 231   // Overridden from aura::WindowObserver:
 232   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE {
 233     parent_->RootWindowDestroyed();
 234     window->RemoveObserver(this);
 235     delete this;
 236   }
 237
 238   DesktopNativeWidgetAura* parent_;
 239
 240   DISALLOW_COPY_AND_ASSIGN(RootWindowDestructionObserver);
 241 };
 242
 243 ////////////////////////////////////////////////////////////////////////////////
 244 // DesktopNativeWidgetAura, public:
 245
 246 int DesktopNativeWidgetAura::cursor_reference_count_ = 0;
 247 DesktopNativeCursorManager* DesktopNativeWidgetAura::native_cursor_manager_ =
 248     NULL;
 249 wm::CursorManager* DesktopNativeWidgetAura::cursor_manager_ = NULL;
 250
 251 DesktopNativeWidgetAura::DesktopNativeWidgetAura(
 252     internal::NativeWidgetDelegate* delegate)
 253     : desktop_window_tree_host_(NULL),
 254       ownership_(Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET),
 255       close_widget_factory_(this),
 256       content_window_container_(NULL),
 257       content_window_(new aura::Window(this)),
 258       native_widget_delegate_(delegate),
 259       last_drop_operation_(ui::DragDropTypes::DRAG_NONE),
 260       restore_focus_on_activate_(false),
 261       restore_focus_on_window_focus_(false),
 262       cursor_(gfx::kNullCursor),
 263       widget_type_(Widget::InitParams::TYPE_WINDOW) {
 264   aura::client::SetFocusChangeObserver(content_window_, this);
 265   aura::client::SetActivationChangeObserver(content_window_, this);
 266 }
 267
 268 DesktopNativeWidgetAura::~DesktopNativeWidgetAura() {
 269   if (ownership_ == Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET)
 270     delete native_widget_delegate_;
 271   else
 272     CloseNow();
 273 }
 274
 275 // static
 276 DesktopNativeWidgetAura* DesktopNativeWidgetAura::ForWindow(
 277     aura::Window* window) {
 278   return window->GetProperty(kDesktopNativeWidgetAuraKey);
 279 }
 280
 281 void DesktopNativeWidgetAura::OnHostClosed() {
 282   // Don't invoke Widget::OnNativeWidgetDestroying(), its done by
 283   // DesktopWindowTreeHost.
 284
 285   // The WindowModalityController is at the front of the event pretarget
 286   // handler list. We destroy it first to preserve order symantics.
 287   if (window_modality_controller_)
 288     window_modality_controller_.reset();
 289
 290   // Make sure we don't have capture. Otherwise CaptureController and
 291   // WindowEventDispatcher are left referencing a deleted Window.
 292   {
 293     aura::Window* capture_window = capture_client_->GetCaptureWindow();
 294     if (capture_window && host_->window()->Contains(capture_window))
 295       capture_window->ReleaseCapture();
 296   }
 297
 298   // DesktopWindowTreeHost owns the ActivationController which ShadowController
 299   // references. Make sure we destroy ShadowController early on.
 300   shadow_controller_.reset();
 301   tooltip_manager_.reset();
 302   if (tooltip_controller_.get()) {
 303     host_->window()->RemovePreTargetHandler(tooltip_controller_.get());
 304     aura::client::SetTooltipClient(host_->window(), NULL);
 305     tooltip_controller_.reset();
 306   }
 307
 308   root_window_event_filter_->RemoveHandler(input_method_event_filter_.get());
 309
 310   window_tree_client_.reset();  // Uses host_->dispatcher() at destruction.
 311
 312   capture_client_.reset();  // Uses host_->dispatcher() at destruction.
 313
 314   // FocusController uses |content_window_|. Destroy it now so that we don't
 315   // have to worry about the possibility of FocusController attempting to use
 316   // |content_window_| after it's been destroyed but before all child windows
 317   // have been destroyed.
 318   host_->window()->RemovePreTargetHandler(focus_client_.get());
 319   aura::client::SetFocusClient(host_->window(), NULL);
 320   aura::client::SetActivationClient(host_->window(), NULL);
 321   focus_client_.reset();
 322
 323   host_->RemoveObserver(this);
 324   host_.reset();  // Uses input_method_event_filter_ at destruction.
 325   // WindowEventDispatcher owns |desktop_window_tree_host_|.
 326   desktop_window_tree_host_ = NULL;
 327   content_window_ = NULL;
 328
 329   native_widget_delegate_->OnNativeWidgetDestroyed();
 330   if (ownership_ == Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET)
 331     delete this;
 332 }
 333
 334 void DesktopNativeWidgetAura::OnDesktopWindowTreeHostDestroyed(
 335     aura::WindowTreeHost* host) {
 336   // |dispatcher_| is still valid, but DesktopWindowTreeHost is nearly
 337   // destroyed. Do cleanup here of members DesktopWindowTreeHost may also use.
 338   aura::client::SetDispatcherClient(host->window(), NULL);
 339   dispatcher_client_.reset();
 340
 341   // We explicitly do NOT clear the cursor client property. Since the cursor
 342   // manager is a singleton, it can outlive any window hierarchy, and it's
 343   // important that objects attached to this destroying window hierarchy have
 344   // an opportunity to deregister their observers from the cursor manager.
 345   // They may want to do this when they are notified that they're being
 346   // removed from the window hierarchy, which happens soon after this
 347   // function when DesktopWindowTreeHost* calls DestroyDispatcher().
 348   native_cursor_manager_->RemoveHost(host);
 349
 350   aura::client::SetScreenPositionClient(host->window(), NULL);
 351   position_client_.reset();
 352
 353   aura::client::SetDragDropClient(host->window(), NULL);
 354   drag_drop_client_.reset();
 355
 356   aura::client::SetEventClient(host->window(), NULL);
 357   event_client_.reset();
 358 }
 359
 360 void DesktopNativeWidgetAura::HandleActivationChanged(bool active) {
 361   native_widget_delegate_->OnNativeWidgetActivationChanged(active);
 362   aura::client::ActivationClient* activation_client =
 363       aura::client::GetActivationClient(host_->window());
 364   if (!activation_client)
 365     return;
 366   if (active) {
 367     if (GetWidget()->HasFocusManager()) {
 368       // This function can be called before the focus manager has had a
 369       // chance to set the focused view. In which case we should get the
 370       // last focused view.
 371       View* view_for_activation =
 372           GetWidget()->GetFocusManager()->GetFocusedView() ?
 373               GetWidget()->GetFocusManager()->GetFocusedView() :
 374                   GetWidget()->GetFocusManager()->GetStoredFocusView();
 375       if (!view_for_activation)
 376         view_for_activation = GetWidget()->GetRootView();
 377       activation_client->ActivateWindow(
 378           view_for_activation->GetWidget()->GetNativeView());
 379     }
 380   } else {
 381     // If we're not active we need to deactivate the corresponding
 382     // aura::Window. This way if a child widget is active it gets correctly
 383     // deactivated (child widgets don't get native desktop activation changes,
 384     // only aura activation changes).
 385     aura::Window* active_window = activation_client->GetActiveWindow();
 386     if (active_window)
 387       activation_client->DeactivateWindow(active_window);
 388   }
 389 }
 390
 391 ////////////////////////////////////////////////////////////////////////////////
 392 // DesktopNativeWidgetAura, internal::NativeWidgetPrivate implementation:
 393
 394 void DesktopNativeWidgetAura::InitNativeWidget(
 395     const Widget::InitParams& params) {
 396   ownership_ = params.ownership;
 397   widget_type_ = params.type;
 398
 399   NativeWidgetAura::RegisterNativeWidgetForWindow(this, content_window_);
 400   // Animations on TYPE_WINDOW are handled by the OS. Additionally if we animate
 401   // these windows the size of the window gets augmented, effecting restore
 402   // bounds and maximized windows in bad ways.
 403   if (params.type == Widget::InitParams::TYPE_WINDOW &&
 404       !params.remove_standard_frame) {
 405     content_window_->SetProperty(aura::client::kAnimationsDisabledKey, true);
 406   }
 407   content_window_->SetType(GetAuraWindowTypeForWidgetType(params.type));
 408   content_window_->Init(params.layer_type);
 409   wm::SetShadowType(content_window_, wm::SHADOW_TYPE_NONE);
 410
 411   content_window_container_ = new aura::Window(NULL);
 412   content_window_container_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
 413   content_window_container_->Show();
 414   content_window_container_->AddChild(content_window_);
 415
 416   desktop_window_tree_host_ = params.desktop_window_tree_host ?
 417       params.desktop_window_tree_host :
 418       DesktopWindowTreeHost::Create(native_widget_delegate_, this);
 419   host_.reset(desktop_window_tree_host_->AsWindowTreeHost());
 420   desktop_window_tree_host_->Init(content_window_, params);
 421
 422   // Mark this window as Desktop root window.
 423   host_->window()->SetProperty(views::kDesktopRootWindow, true);
 424
 425   host_->InitHost();
 426   host_->window()->AddChild(content_window_container_);
 427   host_->window()->SetProperty(kDesktopNativeWidgetAuraKey, this);
 428
 429   host_->window()->AddObserver(new RootWindowDestructionObserver(this));
 430
 431   // The WindowsModalityController event filter should be at the head of the
 432   // pre target handlers list. This ensures that it handles input events first
 433   // when modal windows are at the top of the Zorder.
 434   if (widget_type_ == Widget::InitParams::TYPE_WINDOW)
 435     window_modality_controller_.reset(
 436         new wm::WindowModalityController(host_->window()));
 437
 438   // |root_window_event_filter_| must be created before
 439   // OnWindowTreeHostCreated() is invoked.
 440
 441   // CEF sets focus to the window the user clicks down on.
 442   // TODO(beng): see if we can't do this some other way. CEF seems a heavy-
 443   //             handed way of accomplishing focus.
 444   // No event filter for aura::Env. Create CompoundEventFilter per
 445   // WindowEventDispatcher.
 446   root_window_event_filter_.reset(new wm::CompoundEventFilter);
 447   host_->window()->AddPreTargetHandler(root_window_event_filter_.get());
 448
 449   // The host's dispatcher must be added to |native_cursor_manager_| before
 450   // OnNativeWidgetCreated() is called.
 451   cursor_reference_count_++;
 452   if (!native_cursor_manager_) {
 453     native_cursor_manager_ = new DesktopNativeCursorManager(
 454         DesktopCursorLoaderUpdater::Create());
 455   }
 456   if (!cursor_manager_) {
 457     cursor_manager_ = new wm::CursorManager(
 458         scoped_ptr<wm::NativeCursorManager>(native_cursor_manager_));
 459   }
 460   native_cursor_manager_->AddHost(host());
 461   aura::client::SetCursorClient(host_->window(), cursor_manager_);
 462
 463   desktop_window_tree_host_->OnNativeWidgetCreated(params);
 464
 465   UpdateWindowTransparency();
 466
 467   capture_client_.reset(new DesktopCaptureClient(host_->window()));
 468
 469   wm::FocusController* focus_controller =
 470       new wm::FocusController(new DesktopFocusRules(content_window_));
 471   focus_client_.reset(focus_controller);
 472   aura::client::SetFocusClient(host_->window(), focus_controller);
 473   aura::client::SetActivationClient(host_->window(), focus_controller);
 474   host_->window()->AddPreTargetHandler(focus_controller);
 475
 476   dispatcher_client_.reset(new DesktopDispatcherClient);
 477   aura::client::SetDispatcherClient(host_->window(),
 478                                     dispatcher_client_.get());
 479
 480   position_client_.reset(new DesktopScreenPositionClient(host_->window()));
 481
 482   InstallInputMethodEventFilter();
 483
 484   drag_drop_client_ = desktop_window_tree_host_->CreateDragDropClient(
 485       native_cursor_manager_);
 486   aura::client::SetDragDropClient(host_->window(),
 487                                   drag_drop_client_.get());
 488
 489   static_cast<aura::client::FocusClient*>(focus_client_.get())->
 490       FocusWindow(content_window_);
 491
 492   OnHostResized(host());
 493
 494   host_->AddObserver(this);
 495
 496   window_tree_client_.reset(
 497       new DesktopNativeWidgetAuraWindowTreeClient(host_->window()));
 498   drop_helper_.reset(new DropHelper(GetWidget()->GetRootView()));
 499   aura::client::SetDragDropDelegate(content_window_, this);
 500
 501   if (params.type != Widget::InitParams::TYPE_TOOLTIP) {
 502     tooltip_manager_.reset(new TooltipManagerAura(GetWidget()));
 503     tooltip_controller_.reset(
 504         new corewm::TooltipController(
 505             desktop_window_tree_host_->CreateTooltip()));
 506     aura::client::SetTooltipClient(host_->window(),
 507                                    tooltip_controller_.get());
 508     host_->window()->AddPreTargetHandler(tooltip_controller_.get());
 509   }
 510
 511   if (params.opacity == Widget::InitParams::TRANSLUCENT_WINDOW) {
 512     visibility_controller_.reset(new wm::VisibilityController);
 513     aura::client::SetVisibilityClient(host_->window(),
 514                                       visibility_controller_.get());
 515     wm::SetChildWindowVisibilityChangesAnimated(host_->window());
 516     wm::SetChildWindowVisibilityChangesAnimated(
 517         content_window_container_);
 518   }
 519
 520   if (params.type == Widget::InitParams::TYPE_WINDOW) {
 521     focus_manager_event_handler_.reset(new FocusManagerEventHandler(this));
 522     host_->window()->AddPreTargetHandler(focus_manager_event_handler_.get());
 523   }
 524
 525   event_client_.reset(new DesktopEventClient);
 526   aura::client::SetEventClient(host_->window(), event_client_.get());
 527
 528   aura::client::GetFocusClient(content_window_)->FocusWindow(content_window_);
 529
 530   aura::client::SetActivationDelegate(content_window_, this);
 531
 532   shadow_controller_.reset(new wm::ShadowController(
 533       aura::client::GetActivationClient(host_->window())));
 534
 535   content_window_->SetProperty(aura::client::kCanMaximizeKey,
 536                                GetWidget()->widget_delegate()->CanMaximize());
 537   content_window_->SetProperty(aura::client::kCanResizeKey,
 538                                GetWidget()->widget_delegate()->CanResize());
 539
 540   window_reorderer_.reset(new WindowReorderer(content_window_,
 541       GetWidget()->GetRootView()));
 542 }
 543
 544 NonClientFrameView* DesktopNativeWidgetAura::CreateNonClientFrameView() {
 545   return ShouldUseNativeFrame() ? new NativeFrameView(GetWidget()) : NULL;
 546 }
 547
 548 bool DesktopNativeWidgetAura::ShouldUseNativeFrame() const {
 549   return desktop_window_tree_host_->ShouldUseNativeFrame();
 550 }
 551
 552 bool DesktopNativeWidgetAura::ShouldWindowContentsBeTransparent() const {
 553   return desktop_window_tree_host_->ShouldWindowContentsBeTransparent();
 554 }
 555
 556 void DesktopNativeWidgetAura::FrameTypeChanged() {
 557   desktop_window_tree_host_->FrameTypeChanged();
 558   UpdateWindowTransparency();
 559 }
 560
 561 Widget* DesktopNativeWidgetAura::GetWidget() {
 562   return native_widget_delegate_->AsWidget();
 563 }
 564
 565 const Widget* DesktopNativeWidgetAura::GetWidget() const {
 566   return native_widget_delegate_->AsWidget();
 567 }
 568
 569 gfx::NativeView DesktopNativeWidgetAura::GetNativeView() const {
 570   return content_window_;
 571 }
 572
 573 gfx::NativeWindow DesktopNativeWidgetAura::GetNativeWindow() const {
 574   return content_window_;
 575 }
 576
 577 Widget* DesktopNativeWidgetAura::GetTopLevelWidget() {
 578   return GetWidget();
 579 }
 580
 581 const ui::Compositor* DesktopNativeWidgetAura::GetCompositor() const {
 582   return content_window_ ? content_window_->layer()->GetCompositor() : NULL;
 583 }
 584
 585 ui::Compositor* DesktopNativeWidgetAura::GetCompositor() {
 586   return const_cast<ui::Compositor*>(
 587       const_cast<const DesktopNativeWidgetAura*>(this)->GetCompositor());
 588 }
 589
 590 ui::Layer* DesktopNativeWidgetAura::GetLayer() {
 591   return content_window_ ? content_window_->layer() : NULL;
 592 }
 593
 594 void DesktopNativeWidgetAura::ReorderNativeViews() {
 595   window_reorderer_->ReorderChildWindows();
 596 }
 597
 598 void DesktopNativeWidgetAura::ViewRemoved(View* view) {
 599   DCHECK(drop_helper_.get() != NULL);
 600   drop_helper_->ResetTargetViewIfEquals(view);
 601 }
 602
 603 void DesktopNativeWidgetAura::SetNativeWindowProperty(const char* name,
 604                                                       void* value) {
 605   if (content_window_)
 606     content_window_->SetNativeWindowProperty(name, value);
 607 }
 608
 609 void* DesktopNativeWidgetAura::GetNativeWindowProperty(const char* name) const {
 610   return content_window_ ?
 611       content_window_->GetNativeWindowProperty(name) : NULL;
 612 }
 613
 614 TooltipManager* DesktopNativeWidgetAura::GetTooltipManager() const {
 615   return tooltip_manager_.get();
 616 }
 617
 618 void DesktopNativeWidgetAura::SetCapture() {
 619   if (!content_window_)
 620     return;
 621
 622   content_window_->SetCapture();
 623 }
 624
 625 void DesktopNativeWidgetAura::ReleaseCapture() {
 626   if (!content_window_)
 627     return;
 628
 629   content_window_->ReleaseCapture();
 630 }
 631
 632 bool DesktopNativeWidgetAura::HasCapture() const {
 633   return content_window_ && content_window_->HasCapture() &&
 634       desktop_window_tree_host_->HasCapture();
 635 }
 636
 637 InputMethod* DesktopNativeWidgetAura::CreateInputMethod() {
 638   if (switches::IsTextInputFocusManagerEnabled())
 639     return new NullInputMethod();
 640
 641   ui::InputMethod* host = input_method_event_filter_->input_method();
 642   return new InputMethodBridge(this, host, false);
 643 }
 644
 645 internal::InputMethodDelegate*
 646     DesktopNativeWidgetAura::GetInputMethodDelegate() {
 647   return this;
 648 }
 649
 650 ui::InputMethod* DesktopNativeWidgetAura::GetHostInputMethod() {
 651   return input_method_event_filter_->input_method();
 652 }
 653
 654 void DesktopNativeWidgetAura::CenterWindow(const gfx::Size& size) {
 655   if (content_window_)
 656     desktop_window_tree_host_->CenterWindow(size);
 657 }
 658
 659 void DesktopNativeWidgetAura::GetWindowPlacement(
 660       gfx::Rect* bounds,
 661       ui::WindowShowState* maximized) const {
 662   if (content_window_)
 663     desktop_window_tree_host_->GetWindowPlacement(bounds, maximized);
 664 }
 665
 666 bool DesktopNativeWidgetAura::SetWindowTitle(const base::string16& title) {
 667   if (!content_window_)
 668     return false;
 669   content_window_->set_title(title);
 670   return desktop_window_tree_host_->SetWindowTitle(title);
 671 }
 672
 673 void DesktopNativeWidgetAura::SetWindowIcons(const gfx::ImageSkia& window_icon,
 674                                              const gfx::ImageSkia& app_icon) {
 675   if (content_window_)
 676     desktop_window_tree_host_->SetWindowIcons(window_icon, app_icon);
 677 }
 678
 679 void DesktopNativeWidgetAura::InitModalType(ui::ModalType modal_type) {
 680   // 99% of the time, we should not be asked to create a
 681   // DesktopNativeWidgetAura that is modal. We only support window modal
 682   // dialogs on the same lines as non AURA.
 683   desktop_window_tree_host_->InitModalType(modal_type);
 684 }
 685
 686 gfx::Rect DesktopNativeWidgetAura::GetWindowBoundsInScreen() const {
 687   return content_window_ ?
 688       desktop_window_tree_host_->GetWindowBoundsInScreen() : gfx::Rect();
 689 }
 690
 691 gfx::Rect DesktopNativeWidgetAura::GetClientAreaBoundsInScreen() const {
 692   return content_window_ ?
 693       desktop_window_tree_host_->GetClientAreaBoundsInScreen() : gfx::Rect();
 694 }
 695
 696 gfx::Rect DesktopNativeWidgetAura::GetRestoredBounds() const {
 697   return content_window_ ?
 698       desktop_window_tree_host_->GetRestoredBounds() : gfx::Rect();
 699 }
 700
 701 void DesktopNativeWidgetAura::SetBounds(const gfx::Rect& bounds) {
 702   if (!content_window_)
 703     return;
 704   // TODO(ananta)
 705   // This code by default scales the bounds rectangle by 1.
 706   // We could probably get rid of this and similar logic from
 707   // the DesktopNativeWidgetAura::OnWindowTreeHostResized function.
 708   float scale = 1;
 709   aura::Window* root = host_->window();
 710   if (root) {
 711     scale = gfx::Screen::GetScreenFor(root)->
 712         GetDisplayNearestWindow(root).device_scale_factor();
 713   }
 714   gfx::Rect bounds_in_pixels(
 715       gfx::ToCeiledPoint(gfx::ScalePoint(bounds.origin(), scale)),
 716       gfx::ToFlooredSize(gfx::ScaleSize(bounds.size(), scale)));
 717   desktop_window_tree_host_->AsWindowTreeHost()->SetBounds(bounds_in_pixels);
 718 }
 719
 720 void DesktopNativeWidgetAura::SetSize(const gfx::Size& size) {
 721   if (content_window_)
 722     desktop_window_tree_host_->SetSize(size);
 723 }
 724
 725 void DesktopNativeWidgetAura::StackAbove(gfx::NativeView native_view) {
 726 }
 727
 728 void DesktopNativeWidgetAura::StackAtTop() {
 729   if (content_window_)
 730     desktop_window_tree_host_->StackAtTop();
 731 }
 732
 733 void DesktopNativeWidgetAura::StackBelow(gfx::NativeView native_view) {
 734 }
 735
 736 void DesktopNativeWidgetAura::SetShape(gfx::NativeRegion shape) {
 737   if (content_window_)
 738     desktop_window_tree_host_->SetShape(shape);
 739 }
 740
 741 void DesktopNativeWidgetAura::Close() {
 742   if (!content_window_)
 743     return;
 744
 745   content_window_->SuppressPaint();
 746   content_window_->Hide();
 747
 748   desktop_window_tree_host_->Close();
 749 }
 750
 751 void DesktopNativeWidgetAura::CloseNow() {
 752   if (content_window_)
 753     desktop_window_tree_host_->CloseNow();
 754 }
 755
 756 void DesktopNativeWidgetAura::Show() {
 757   if (!content_window_)
 758     return;
 759   desktop_window_tree_host_->AsWindowTreeHost()->Show();
 760   content_window_->Show();
 761 }
 762
 763 void DesktopNativeWidgetAura::Hide() {
 764   if (!content_window_)
 765     return;
 766   desktop_window_tree_host_->AsWindowTreeHost()->Hide();
 767   content_window_->Hide();
 768 }
 769
 770 void DesktopNativeWidgetAura::ShowMaximizedWithBounds(
 771       const gfx::Rect& restored_bounds) {
 772   if (!content_window_)
 773     return;
 774   desktop_window_tree_host_->ShowMaximizedWithBounds(restored_bounds);
 775   content_window_->Show();
 776 }
 777
 778 void DesktopNativeWidgetAura::ShowWithWindowState(ui::WindowShowState state) {
 779   if (!content_window_)
 780     return;
 781   desktop_window_tree_host_->ShowWindowWithState(state);
 782   content_window_->Show();
 783 }
 784
 785 bool DesktopNativeWidgetAura::IsVisible() const {
 786   return content_window_ && desktop_window_tree_host_->IsVisible();
 787 }
 788
 789 void DesktopNativeWidgetAura::Activate() {
 790   if (content_window_)
 791     desktop_window_tree_host_->Activate();
 792 }
 793
 794 void DesktopNativeWidgetAura::Deactivate() {
 795   if (content_window_)
 796     desktop_window_tree_host_->Deactivate();
 797 }
 798
 799 bool DesktopNativeWidgetAura::IsActive() const {
 800   return content_window_ && desktop_window_tree_host_->IsActive();
 801 }
 802
 803 void DesktopNativeWidgetAura::SetAlwaysOnTop(bool always_on_top) {
 804   if (content_window_)
 805     desktop_window_tree_host_->SetAlwaysOnTop(always_on_top);
 806 }
 807
 808 bool DesktopNativeWidgetAura::IsAlwaysOnTop() const {
 809   return content_window_ && desktop_window_tree_host_->IsAlwaysOnTop();
 810 }
 811
 812 void DesktopNativeWidgetAura::SetVisibleOnAllWorkspaces(bool always_visible) {
 813   if (content_window_)
 814     desktop_window_tree_host_->SetVisibleOnAllWorkspaces(always_visible);
 815 }
 816
 817 void DesktopNativeWidgetAura::Maximize() {
 818   if (content_window_)
 819     desktop_window_tree_host_->Maximize();
 820 }
 821
 822 void DesktopNativeWidgetAura::Minimize() {
 823   if (content_window_)
 824     desktop_window_tree_host_->Minimize();
 825 }
 826
 827 bool DesktopNativeWidgetAura::IsMaximized() const {
 828   return content_window_ && desktop_window_tree_host_->IsMaximized();
 829 }
 830
 831 bool DesktopNativeWidgetAura::IsMinimized() const {
 832   return content_window_ && desktop_window_tree_host_->IsMinimized();
 833 }
 834
 835 void DesktopNativeWidgetAura::Restore() {
 836   if (content_window_)
 837     desktop_window_tree_host_->Restore();
 838 }
 839
 840 void DesktopNativeWidgetAura::SetFullscreen(bool fullscreen) {
 841   if (content_window_)
 842     desktop_window_tree_host_->SetFullscreen(fullscreen);
 843 }
 844
 845 bool DesktopNativeWidgetAura::IsFullscreen() const {
 846   return content_window_ && desktop_window_tree_host_->IsFullscreen();
 847 }
 848
 849 void DesktopNativeWidgetAura::SetOpacity(unsigned char opacity) {
 850   if (content_window_)
 851     desktop_window_tree_host_->SetOpacity(opacity);
 852 }
 853
 854 void DesktopNativeWidgetAura::SetUseDragFrame(bool use_drag_frame) {
 855 }
 856
 857 void DesktopNativeWidgetAura::FlashFrame(bool flash_frame) {
 858   if (content_window_)
 859     desktop_window_tree_host_->FlashFrame(flash_frame);
 860 }
 861
 862 void DesktopNativeWidgetAura::RunShellDrag(
 863     View* view,
 864     const ui::OSExchangeData& data,
 865     const gfx::Point& location,
 866     int operation,
 867     ui::DragDropTypes::DragEventSource source) {
 868   views::RunShellDrag(content_window_, data, location, operation, source);
 869 }
 870
 871 void DesktopNativeWidgetAura::SchedulePaintInRect(const gfx::Rect& rect) {
 872   if (content_window_)
 873     content_window_->SchedulePaintInRect(rect);
 874 }
 875
 876 void DesktopNativeWidgetAura::SetCursor(gfx::NativeCursor cursor) {
 877   cursor_ = cursor;
 878   aura::client::CursorClient* cursor_client =
 879       aura::client::GetCursorClient(host_->window());
 880   if (cursor_client)
 881     cursor_client->SetCursor(cursor);
 882 }
 883
 884 bool DesktopNativeWidgetAura::IsMouseEventsEnabled() const {
 885   if (!content_window_)
 886     return false;
 887   aura::client::CursorClient* cursor_client =
 888       aura::client::GetCursorClient(host_->window());
 889   return cursor_client ? cursor_client->IsMouseEventsEnabled() : true;
 890 }
 891
 892 void DesktopNativeWidgetAura::ClearNativeFocus() {
 893   desktop_window_tree_host_->ClearNativeFocus();
 894
 895   if (ShouldActivate()) {
 896     aura::client::GetFocusClient(content_window_)->
 897         ResetFocusWithinActiveWindow(content_window_);
 898   }
 899 }
 900
 901 gfx::Rect DesktopNativeWidgetAura::GetWorkAreaBoundsInScreen() const {
 902   return desktop_window_tree_host_ ?
 903       desktop_window_tree_host_->GetWorkAreaBoundsInScreen() : gfx::Rect();
 904 }
 905
 906 Widget::MoveLoopResult DesktopNativeWidgetAura::RunMoveLoop(
 907     const gfx::Vector2d& drag_offset,
 908     Widget::MoveLoopSource source,
 909     Widget::MoveLoopEscapeBehavior escape_behavior) {
 910   if (!content_window_)
 911     return Widget::MOVE_LOOP_CANCELED;
 912   return desktop_window_tree_host_->RunMoveLoop(drag_offset, source,
 913                                                 escape_behavior);
 914 }
 915
 916 void DesktopNativeWidgetAura::EndMoveLoop() {
 917   if (content_window_)
 918     desktop_window_tree_host_->EndMoveLoop();
 919 }
 920
 921 void DesktopNativeWidgetAura::SetVisibilityChangedAnimationsEnabled(
 922     bool value) {
 923   if (content_window_)
 924     desktop_window_tree_host_->SetVisibilityChangedAnimationsEnabled(value);
 925 }
 926
 927 ui::NativeTheme* DesktopNativeWidgetAura::GetNativeTheme() const {
 928   return DesktopWindowTreeHost::GetNativeTheme(content_window_);
 929 }
 930
 931 void DesktopNativeWidgetAura::OnRootViewLayout() const {
 932   if (content_window_)
 933     desktop_window_tree_host_->OnRootViewLayout();
 934 }
 935
 936 void DesktopNativeWidgetAura::RepostNativeEvent(gfx::NativeEvent native_event) {
 937   OnEvent(native_event);
 938 }
 939
 940 ////////////////////////////////////////////////////////////////////////////////
 941 // DesktopNativeWidgetAura, aura::WindowDelegate implementation:
 942
 943 gfx::Size DesktopNativeWidgetAura::GetMinimumSize() const {
 944   return native_widget_delegate_->GetMinimumSize();
 945 }
 946
 947 gfx::Size DesktopNativeWidgetAura::GetMaximumSize() const {
 948   return native_widget_delegate_->GetMaximumSize();
 949 }
 950
 951 gfx::NativeCursor DesktopNativeWidgetAura::GetCursor(const gfx::Point& point) {
 952   return cursor_;
 953 }
 954
 955 int DesktopNativeWidgetAura::GetNonClientComponent(
 956     const gfx::Point& point) const {
 957   return native_widget_delegate_->GetNonClientComponent(point);
 958 }
 959
 960 bool DesktopNativeWidgetAura::ShouldDescendIntoChildForEventHandling(
 961       aura::Window* child,
 962       const gfx::Point& location) {
 963   views::WidgetDelegate* widget_delegate = GetWidget()->widget_delegate();
 964   return !widget_delegate ||
 965       widget_delegate->ShouldDescendIntoChildForEventHandling(child, location);
 966 }
 967
 968 bool DesktopNativeWidgetAura::CanFocus() {
 969   return true;
 970 }
 971
 972 void DesktopNativeWidgetAura::OnCaptureLost() {
 973   native_widget_delegate_->OnMouseCaptureLost();
 974 }
 975
 976 void DesktopNativeWidgetAura::OnPaint(gfx::Canvas* canvas) {
 977   native_widget_delegate_->OnNativeWidgetPaint(canvas);
 978 }
 979
 980 void DesktopNativeWidgetAura::OnDeviceScaleFactorChanged(
 981     float device_scale_factor) {
 982 }
 983
 984 void DesktopNativeWidgetAura::OnWindowDestroying(aura::Window* window) {
 985   // Cleanup happens in OnHostClosed().
 986 }
 987
 988 void DesktopNativeWidgetAura::OnWindowDestroyed(aura::Window* window) {
 989   // Cleanup happens in OnHostClosed(). We own |content_window_| (indirectly by
 990   // way of |dispatcher_|) so there should be no need to do any processing
 991   // here.
 992 }
 993
 994 void DesktopNativeWidgetAura::OnWindowTargetVisibilityChanged(bool visible) {
 995 }
 996
 997 bool DesktopNativeWidgetAura::HasHitTestMask() const {
 998   return native_widget_delegate_->HasHitTestMask();
 999 }
1000
1001 void DesktopNativeWidgetAura::GetHitTestMask(gfx::Path* mask) const {
1002   native_widget_delegate_->GetHitTestMask(mask);
1003 }
1004
1005 ////////////////////////////////////////////////////////////////////////////////
1006 // DesktopNativeWidgetAura, ui::EventHandler implementation:
1007
1008 void DesktopNativeWidgetAura::OnKeyEvent(ui::KeyEvent* event) {
1009   if (event->is_char()) {
1010     // If a ui::InputMethod object is attached to the root window, character
1011     // events are handled inside the object and are not passed to this function.
1012     // If such object is not attached, character events might be sent (e.g. on
1013     // Windows). In this case, we just skip these.
1014     return;
1015   }
1016   // Renderer may send a key event back to us if the key event wasn't handled,
1017   // and the window may be invisible by that time.
1018   if (!content_window_->IsVisible())
1019     return;
1020
1021   native_widget_delegate_->OnKeyEvent(event);
1022   if (event->handled())
1023     return;
1024
1025   if (GetWidget()->HasFocusManager() &&
1026       !GetWidget()->GetFocusManager()->OnKeyEvent(*event))
1027     event->SetHandled();
1028 }
1029
1030 void DesktopNativeWidgetAura::OnMouseEvent(ui::MouseEvent* event) {
1031   DCHECK(content_window_->IsVisible());
1032   if (tooltip_manager_.get())
1033     tooltip_manager_->UpdateTooltip();
1034   TooltipManagerAura::UpdateTooltipManagerForCapture(GetWidget());
1035   native_widget_delegate_->OnMouseEvent(event);
1036   // WARNING: we may have been deleted.
1037 }
1038
1039 void DesktopNativeWidgetAura::OnScrollEvent(ui::ScrollEvent* event) {
1040   if (event->type() == ui::ET_SCROLL) {
1041     native_widget_delegate_->OnScrollEvent(event);
1042     if (event->handled())
1043       return;
1044
1045     // Convert unprocessed scroll events into wheel events.
1046     ui::MouseWheelEvent mwe(*static_cast<ui::ScrollEvent*>(event));
1047     native_widget_delegate_->OnMouseEvent(&mwe);
1048     if (mwe.handled())
1049       event->SetHandled();
1050   } else {
1051     native_widget_delegate_->OnScrollEvent(event);
1052   }
1053 }
1054
1055 void DesktopNativeWidgetAura::OnGestureEvent(ui::GestureEvent* event) {
1056   native_widget_delegate_->OnGestureEvent(event);
1057 }
1058
1059 ////////////////////////////////////////////////////////////////////////////////
1060 // DesktopNativeWidgetAura, aura::client::ActivationDelegate implementation:
1061
1062 bool DesktopNativeWidgetAura::ShouldActivate() const {
1063   return native_widget_delegate_->CanActivate();
1064 }
1065
1066 ////////////////////////////////////////////////////////////////////////////////
1067 // DesktopNativeWidgetAura, aura::client::ActivationChangeObserver
1068 //    implementation:
1069
1070 void DesktopNativeWidgetAura::OnWindowActivated(aura::Window* gained_active,
1071                                                 aura::Window* lost_active) {
1072   DCHECK(content_window_ == gained_active || content_window_ == lost_active);
1073   if (gained_active == content_window_ && restore_focus_on_activate_) {
1074     restore_focus_on_activate_ = false;
1075     GetWidget()->GetFocusManager()->RestoreFocusedView();
1076   } else if (lost_active == content_window_ && GetWidget()->HasFocusManager()) {
1077     DCHECK(!restore_focus_on_activate_);
1078     restore_focus_on_activate_ = true;
1079     // Pass in false so that ClearNativeFocus() isn't invoked.
1080     GetWidget()->GetFocusManager()->StoreFocusedView(false);
1081   }
1082 }
1083
1084 ////////////////////////////////////////////////////////////////////////////////
1085 // DesktopNativeWidgetAura, aura::client::FocusChangeObserver implementation:
1086
1087 void DesktopNativeWidgetAura::OnWindowFocused(aura::Window* gained_focus,
1088                                               aura::Window* lost_focus) {
1089   if (content_window_ == gained_focus) {
1090     desktop_window_tree_host_->OnNativeWidgetFocus();
1091     native_widget_delegate_->OnNativeFocus(lost_focus);
1092
1093     // If focus is moving from a descendant Window to |content_window_| then
1094     // native activation hasn't changed. Still, the InputMethod and FocusManager
1095     // must be informed of the Window focus change.
1096     InputMethod* input_method = GetWidget()->GetInputMethod();
1097     if (input_method)
1098       input_method->OnFocus();
1099
1100     if (restore_focus_on_window_focus_) {
1101       restore_focus_on_window_focus_ = false;
1102       GetWidget()->GetFocusManager()->RestoreFocusedView();
1103     }
1104   } else if (content_window_ == lost_focus) {
1105     desktop_window_tree_host_->OnNativeWidgetBlur();
1106     native_widget_delegate_->OnNativeBlur(gained_focus);
1107
1108     DCHECK(!restore_focus_on_window_focus_);
1109     restore_focus_on_window_focus_ = true;
1110     GetWidget()->GetFocusManager()->StoreFocusedView(false);
1111   }
1112 }
1113
1114 ////////////////////////////////////////////////////////////////////////////////
1115 // DesktopNativeWidgetAura, views::internal::InputMethodDelegate:
1116
1117 void DesktopNativeWidgetAura::DispatchKeyEventPostIME(const ui::KeyEvent& key) {
1118   FocusManager* focus_manager =
1119       native_widget_delegate_->AsWidget()->GetFocusManager();
1120   native_widget_delegate_->OnKeyEvent(const_cast<ui::KeyEvent*>(&key));
1121   if (key.handled() || !focus_manager)
1122     return;
1123   focus_manager->OnKeyEvent(key);
1124 }
1125
1126 ////////////////////////////////////////////////////////////////////////////////
1127 // DesktopNativeWidgetAura, aura::WindowDragDropDelegate implementation:
1128
1129 void DesktopNativeWidgetAura::OnDragEntered(const ui::DropTargetEvent& event) {
1130   DCHECK(drop_helper_.get() != NULL);
1131   last_drop_operation_ = drop_helper_->OnDragOver(event.data(),
1132       event.location(), event.source_operations());
1133 }
1134
1135 int DesktopNativeWidgetAura::OnDragUpdated(const ui::DropTargetEvent& event) {
1136   DCHECK(drop_helper_.get() != NULL);
1137   last_drop_operation_ = drop_helper_->OnDragOver(event.data(),
1138       event.location(), event.source_operations());
1139   return last_drop_operation_;
1140 }
1141
1142 void DesktopNativeWidgetAura::OnDragExited() {
1143   DCHECK(drop_helper_.get() != NULL);
1144   drop_helper_->OnDragExit();
1145 }
1146
1147 int DesktopNativeWidgetAura::OnPerformDrop(const ui::DropTargetEvent& event) {
1148   DCHECK(drop_helper_.get() != NULL);
1149   Activate();
1150   return drop_helper_->OnDrop(event.data(), event.location(),
1151       last_drop_operation_);
1152 }
1153
1154 ////////////////////////////////////////////////////////////////////////////////
1155 // DesktopNativeWidgetAura, aura::WindowTreeHostObserver implementation:
1156
1157 void DesktopNativeWidgetAura::OnHostCloseRequested(
1158     const aura::WindowTreeHost* host) {
1159   GetWidget()->Close();
1160 }
1161
1162 void DesktopNativeWidgetAura::OnHostResized(const aura::WindowTreeHost* host) {
1163   // Don't update the bounds of the child layers when animating closed. If we
1164   // did it would force a paint, which we don't want. We don't want the paint
1165   // as we can't assume any of the children are valid.
1166   if (desktop_window_tree_host_->IsAnimatingClosed())
1167     return;
1168
1169   gfx::Rect new_bounds = gfx::Rect(host->window()->bounds().size());
1170   content_window_->SetBounds(new_bounds);
1171   // Can be NULL at start.
1172   if (content_window_container_)
1173     content_window_container_->SetBounds(new_bounds);
1174   native_widget_delegate_->OnNativeWidgetSizeChanged(new_bounds.size());
1175 }
1176
1177 void DesktopNativeWidgetAura::OnHostMoved(const aura::WindowTreeHost* host,
1178                                           const gfx::Point& new_origin) {
1179   TRACE_EVENT1("views", "DesktopNativeWidgetAura::OnHostMoved",
1180                "new_origin", new_origin.ToString());
1181
1182   native_widget_delegate_->OnNativeWidgetMove();
1183 }
1184
1185 ////////////////////////////////////////////////////////////////////////////////
1186 // DesktopNativeWidgetAura, private:
1187
1188 void DesktopNativeWidgetAura::InstallInputMethodEventFilter() {
1189   DCHECK(!input_method_event_filter_.get());
1190
1191   input_method_event_filter_.reset(new wm::InputMethodEventFilter(
1192       host_->GetAcceleratedWidget()));
1193   input_method_event_filter_->SetInputMethodPropertyInRootWindow(
1194       host_->window());
1195   root_window_event_filter_->AddHandler(input_method_event_filter_.get());
1196 }
1197
1198 void DesktopNativeWidgetAura::UpdateWindowTransparency() {
1199   content_window_->SetTransparent(
1200       desktop_window_tree_host_->ShouldWindowContentsBeTransparent());
1201   // Regardless of transparency or not, this root content window will always
1202   // fill its bounds completely, so set this flag to true to avoid an
1203   // unecessary clear before update.
1204   content_window_->SetFillsBoundsCompletely(true);
1205 }
1206
1207 void DesktopNativeWidgetAura::RootWindowDestroyed() {
1208   cursor_reference_count_--;
1209   if (cursor_reference_count_ == 0) {
1210     // We are the last DesktopNativeWidgetAura instance, and we are responsible
1211     // for cleaning up |cursor_manager_|.
1212     delete cursor_manager_;
1213     native_cursor_manager_ = NULL;
1214     cursor_manager_ = NULL;
1215   }
1216 }
1217
1218 }  // namespace views