ui/keyboard/keyboard_controller.cc

   1 // Copyright (c) 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 "ui/keyboard/keyboard_controller.h"
   6
   7 #include <set>
   8
   9 #include "base/bind.h"
  10 #include "base/command_line.h"
  11 #include "content/public/browser/render_widget_host.h"
  12 #include "content/public/browser/render_widget_host_iterator.h"
  13 #include "content/public/browser/render_widget_host_view.h"
  14 #include "ui/aura/window.h"
  15 #include "ui/aura/window_delegate.h"
  16 #include "ui/aura/window_observer.h"
  17 #include "ui/base/cursor/cursor.h"
  18 #include "ui/base/hit_test.h"
  19 #include "ui/base/ime/input_method.h"
  20 #include "ui/base/ime/text_input_client.h"
  21 #include "ui/compositor/layer_animation_observer.h"
  22 #include "ui/compositor/scoped_layer_animation_settings.h"
  23 #include "ui/gfx/path.h"
  24 #include "ui/gfx/rect.h"
  25 #include "ui/gfx/skia_util.h"
  26 #include "ui/keyboard/keyboard_controller_observer.h"
  27 #include "ui/keyboard/keyboard_controller_proxy.h"
  28 #include "ui/keyboard/keyboard_layout_manager.h"
  29 #include "ui/keyboard/keyboard_switches.h"
  30 #include "ui/keyboard/keyboard_util.h"
  31 #include "ui/wm/core/masked_window_targeter.h"
  32
  33 #if defined(OS_CHROMEOS)
  34 #include "base/process/launch.h"
  35 #include "base/sys_info.h"
  36 #endif
  37
  38 namespace {
  39
  40 const int kHideKeyboardDelayMs = 100;
  41
  42 // The virtual keyboard show/hide animation duration.
  43 const int kShowAnimationDurationMs = 350;
  44 const int kHideAnimationDurationMs = 100;
  45
  46 // The opacity of virtual keyboard container when show animation starts or
  47 // hide animation finishes.
  48 // TODO(rsadam@): Investigate why setting this to zero crashes.
  49 const float kAnimationStartOrAfterHideOpacity = 0.01f;
  50
  51 // Event targeter for the keyboard container.
  52 class KeyboardContainerTargeter : public wm::MaskedWindowTargeter {
  53  public:
  54   KeyboardContainerTargeter(aura::Window* container,
  55                             keyboard::KeyboardControllerProxy* proxy)
  56       : wm::MaskedWindowTargeter(container),
  57         proxy_(proxy) {
  58   }
  59
  60   virtual ~KeyboardContainerTargeter() {}
  61
  62  private:
  63   // wm::MaskedWindowTargeter:
  64   virtual bool GetHitTestMask(aura::Window* window,
  65                               gfx::Path* mask) const OVERRIDE {
  66     if (proxy_ && !proxy_->HasKeyboardWindow())
  67       return true;
  68     gfx::Rect keyboard_bounds = proxy_ ? proxy_->GetKeyboardWindow()->bounds() :
  69         keyboard::DefaultKeyboardBoundsFromWindowBounds(window->bounds());
  70     mask->addRect(RectToSkRect(keyboard_bounds));
  71     return true;
  72   }
  73
  74   keyboard::KeyboardControllerProxy* proxy_;
  75
  76   DISALLOW_COPY_AND_ASSIGN(KeyboardContainerTargeter);
  77 };
  78
  79 // The KeyboardWindowDelegate makes sure the keyboard-window does not get focus.
  80 // This is necessary to make sure that the synthetic key-events reach the target
  81 // window.
  82 // The delegate deletes itself when the window is destroyed.
  83 class KeyboardWindowDelegate : public aura::WindowDelegate {
  84  public:
  85   explicit KeyboardWindowDelegate(keyboard::KeyboardControllerProxy* proxy)
  86       : proxy_(proxy) {}
  87   virtual ~KeyboardWindowDelegate() {}
  88
  89  private:
  90   // Overridden from aura::WindowDelegate:
  91   virtual gfx::Size GetMinimumSize() const OVERRIDE { return gfx::Size(); }
  92   virtual gfx::Size GetMaximumSize() const OVERRIDE { return gfx::Size(); }
  93   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
  94                                const gfx::Rect& new_bounds) OVERRIDE {
  95     bounds_ = new_bounds;
  96   }
  97   virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE {
  98     return gfx::kNullCursor;
  99   }
 100   virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE {
 101     return HTNOWHERE;
 102   }
 103   virtual bool ShouldDescendIntoChildForEventHandling(
 104       aura::Window* child,
 105       const gfx::Point& location) OVERRIDE {
 106     return true;
 107   }
 108   virtual bool CanFocus() OVERRIDE { return false; }
 109   virtual void OnCaptureLost() OVERRIDE {}
 110   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {}
 111   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE {}
 112   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {}
 113   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE { delete this; }
 114   virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {}
 115   virtual bool HasHitTestMask() const OVERRIDE {
 116     return !proxy_ || proxy_->HasKeyboardWindow();
 117   }
 118   virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE {
 119     if (proxy_ && !proxy_->HasKeyboardWindow())
 120       return;
 121     gfx::Rect keyboard_bounds = proxy_ ? proxy_->GetKeyboardWindow()->bounds() :
 122         keyboard::DefaultKeyboardBoundsFromWindowBounds(bounds_);
 123     mask->addRect(RectToSkRect(keyboard_bounds));
 124   }
 125
 126   gfx::Rect bounds_;
 127   keyboard::KeyboardControllerProxy* proxy_;
 128
 129   DISALLOW_COPY_AND_ASSIGN(KeyboardWindowDelegate);
 130 };
 131
 132 void ToggleTouchEventLogging(bool enable) {
 133 #if defined(OS_CHROMEOS)
 134   if (!base::SysInfo::IsRunningOnChromeOS())
 135     return;
 136   CommandLine command(
 137       base::FilePath("/opt/google/touchscreen/toggle_touch_event_logging"));
 138   if (enable)
 139     command.AppendArg("1");
 140   else
 141     command.AppendArg("0");
 142   VLOG(1) << "Running " << command.GetCommandLineString();
 143   base::LaunchOptions options;
 144   options.wait = true;
 145   base::LaunchProcess(command, options, NULL);
 146 #endif
 147 }
 148
 149 aura::Window *GetFrameWindow(aura::Window *window) {
 150   // Each container window has a non-negative id.  Stop traversing at the child
 151   // of a container window.
 152   if (!window)
 153     return NULL;
 154   while (window->parent() && window->parent()->id() < 0) {
 155     window = window->parent();
 156   }
 157   return window;
 158 }
 159
 160 }  // namespace
 161
 162 namespace keyboard {
 163
 164 // Observer for both keyboard show and hide animations. It should be owned by
 165 // KeyboardController.
 166 class CallbackAnimationObserver : public ui::LayerAnimationObserver {
 167  public:
 168   CallbackAnimationObserver(ui::LayerAnimator* animator,
 169                             base::Callback<void(void)> callback);
 170   virtual ~CallbackAnimationObserver();
 171
 172  private:
 173   // Overridden from ui::LayerAnimationObserver:
 174   virtual void OnLayerAnimationEnded(ui::LayerAnimationSequence* seq) OVERRIDE;
 175   virtual void OnLayerAnimationAborted(
 176       ui::LayerAnimationSequence* seq) OVERRIDE;
 177   virtual void OnLayerAnimationScheduled(
 178       ui::LayerAnimationSequence* seq) OVERRIDE {}
 179
 180   ui::LayerAnimator* animator_;
 181   base::Callback<void(void)> callback_;
 182
 183   DISALLOW_COPY_AND_ASSIGN(CallbackAnimationObserver);
 184 };
 185
 186 CallbackAnimationObserver::CallbackAnimationObserver(
 187     ui::LayerAnimator* animator, base::Callback<void(void)> callback)
 188     : animator_(animator), callback_(callback) {
 189 }
 190
 191 CallbackAnimationObserver::~CallbackAnimationObserver() {
 192   animator_->RemoveObserver(this);
 193 }
 194
 195 void CallbackAnimationObserver::OnLayerAnimationEnded(
 196     ui::LayerAnimationSequence* seq) {
 197   if (animator_->is_animating())
 198     return;
 199   animator_->RemoveObserver(this);
 200   callback_.Run();
 201 }
 202
 203 void CallbackAnimationObserver::OnLayerAnimationAborted(
 204     ui::LayerAnimationSequence* seq) {
 205   animator_->RemoveObserver(this);
 206 }
 207
 208 class WindowBoundsChangeObserver : public aura::WindowObserver {
 209  public:
 210   virtual void OnWindowBoundsChanged(aura::Window* window,
 211                                      const gfx::Rect& old_bounds,
 212                                      const gfx::Rect& new_bounds) OVERRIDE;
 213   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
 214
 215   void AddObservedWindow(aura::Window* window);
 216   void RemoveAllObservedWindows();
 217
 218  private:
 219   std::set<aura::Window*> observed_windows_;
 220 };
 221
 222 void WindowBoundsChangeObserver::OnWindowBoundsChanged(aura::Window* window,
 223     const gfx::Rect& old_bounds, const gfx::Rect& new_bounds) {
 224   KeyboardController* controller =  KeyboardController::GetInstance();
 225   if (controller)
 226     controller->UpdateWindowInsets(window);
 227 }
 228
 229 void WindowBoundsChangeObserver::OnWindowDestroyed(aura::Window* window) {
 230   if (window->HasObserver(this))
 231     window->RemoveObserver(this);
 232   observed_windows_.erase(window);
 233 }
 234
 235 void WindowBoundsChangeObserver::AddObservedWindow(aura::Window* window) {
 236   if (!window->HasObserver(this)) {
 237     window->AddObserver(this);
 238     observed_windows_.insert(window);
 239   }
 240 }
 241
 242 void WindowBoundsChangeObserver::RemoveAllObservedWindows() {
 243   for (std::set<aura::Window*>::iterator it = observed_windows_.begin();
 244        it != observed_windows_.end(); ++it)
 245     (*it)->RemoveObserver(this);
 246   observed_windows_.clear();
 247 }
 248
 249 // static
 250 KeyboardController* KeyboardController::instance_ = NULL;
 251
 252 KeyboardController::KeyboardController(KeyboardControllerProxy* proxy)
 253     : proxy_(proxy),
 254       input_method_(NULL),
 255       keyboard_visible_(false),
 256       show_on_resize_(false),
 257       lock_keyboard_(false),
 258       type_(ui::TEXT_INPUT_TYPE_NONE),
 259       weak_factory_(this) {
 260   CHECK(proxy);
 261   input_method_ = proxy_->GetInputMethod();
 262   input_method_->AddObserver(this);
 263   window_bounds_observer_.reset(new WindowBoundsChangeObserver());
 264 }
 265
 266 KeyboardController::~KeyboardController() {
 267   if (container_)
 268     container_->RemoveObserver(this);
 269   if (input_method_)
 270     input_method_->RemoveObserver(this);
 271   ResetWindowInsets();
 272 }
 273
 274 // static
 275 void KeyboardController::ResetInstance(KeyboardController* controller) {
 276   if (instance_ && instance_ != controller)
 277     delete instance_;
 278   instance_ = controller;
 279 }
 280
 281 // static
 282 KeyboardController* KeyboardController::GetInstance() {
 283   return instance_;
 284 }
 285
 286 aura::Window* KeyboardController::GetContainerWindow() {
 287   if (!container_.get()) {
 288     container_.reset(new aura::Window(
 289         new KeyboardWindowDelegate(proxy_.get())));
 290     container_->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
 291         new KeyboardContainerTargeter(container_.get(), proxy_.get())));
 292     container_->SetName("KeyboardContainer");
 293     container_->set_owned_by_parent(false);
 294     container_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
 295     container_->AddObserver(this);
 296     container_->SetLayoutManager(new KeyboardLayoutManager(this));
 297   }
 298   return container_.get();
 299 }
 300
 301 void KeyboardController::NotifyKeyboardBoundsChanging(
 302     const gfx::Rect& new_bounds) {
 303   current_keyboard_bounds_ = new_bounds;
 304   if (proxy_->HasKeyboardWindow() && proxy_->GetKeyboardWindow()->IsVisible()) {
 305     FOR_EACH_OBSERVER(KeyboardControllerObserver,
 306                       observer_list_,
 307                       OnKeyboardBoundsChanging(new_bounds));
 308     if (keyboard::IsKeyboardOverscrollEnabled()) {
 309       // Adjust the height of the viewport for visible windows on the primary
 310       // display.
 311       // TODO(kevers): Add EnvObserver to properly initialize insets if a
 312       // window is created while the keyboard is visible.
 313       scoped_ptr<content::RenderWidgetHostIterator> widgets(
 314           content::RenderWidgetHost::GetRenderWidgetHosts());
 315       aura::Window *keyboard_window = proxy_->GetKeyboardWindow();
 316       aura::Window *root_window = keyboard_window->GetRootWindow();
 317       while (content::RenderWidgetHost* widget = widgets->GetNextHost()) {
 318         content::RenderWidgetHostView* view = widget->GetView();
 319         // Can be NULL, e.g. if the RenderWidget is being destroyed or
 320         // the render process crashed.
 321         if (view) {
 322           aura::Window *window = view->GetNativeView();
 323           // If virtual keyboard failed to load, a widget that displays error
 324           // message will be created and adds as a child of the virtual keyboard
 325           // window. We want to avoid add BoundsChangedObserver to that window.
 326           if (GetFrameWindow(window) != keyboard_window &&
 327               window->GetRootWindow() == root_window) {
 328             gfx::Rect window_bounds = window->GetBoundsInScreen();
 329             gfx::Rect intersect = gfx::IntersectRects(window_bounds,
 330                                                       new_bounds);
 331             int overlap = intersect.height();
 332             if (overlap > 0 && overlap < window_bounds.height())
 333               view->SetInsets(gfx::Insets(0, 0, overlap, 0));
 334             else
 335               view->SetInsets(gfx::Insets());
 336             AddBoundsChangedObserver(window);
 337           }
 338         }
 339       }
 340     } else {
 341       ResetWindowInsets();
 342     }
 343   } else {
 344     current_keyboard_bounds_ = gfx::Rect();
 345   }
 346 }
 347
 348 void KeyboardController::HideKeyboard(HideReason reason) {
 349   keyboard_visible_ = false;
 350   ToggleTouchEventLogging(true);
 351
 352   keyboard::LogKeyboardControlEvent(
 353       reason == HIDE_REASON_AUTOMATIC ?
 354           keyboard::KEYBOARD_CONTROL_HIDE_AUTO :
 355           keyboard::KEYBOARD_CONTROL_HIDE_USER);
 356
 357   NotifyKeyboardBoundsChanging(gfx::Rect());
 358
 359   set_lock_keyboard(false);
 360
 361   ui::LayerAnimator* container_animator = container_->layer()->GetAnimator();
 362   animation_observer_.reset(new CallbackAnimationObserver(
 363       container_animator,
 364       base::Bind(&KeyboardController::HideAnimationFinished,
 365                  base::Unretained(this))));
 366   container_animator->AddObserver(animation_observer_.get());
 367
 368   ui::ScopedLayerAnimationSettings settings(container_animator);
 369   settings.SetTweenType(gfx::Tween::FAST_OUT_LINEAR_IN);
 370   settings.SetTransitionDuration(
 371       base::TimeDelta::FromMilliseconds(kHideAnimationDurationMs));
 372   gfx::Transform transform;
 373   transform.Translate(0, proxy_->GetKeyboardWindow()->bounds().height());
 374   container_->SetTransform(transform);
 375   container_->layer()->SetOpacity(kAnimationStartOrAfterHideOpacity);
 376 }
 377
 378 void KeyboardController::AddObserver(KeyboardControllerObserver* observer) {
 379   observer_list_.AddObserver(observer);
 380 }
 381
 382 void KeyboardController::RemoveObserver(KeyboardControllerObserver* observer) {
 383   observer_list_.RemoveObserver(observer);
 384 }
 385
 386 void KeyboardController::ShowKeyboard(bool lock) {
 387   set_lock_keyboard(lock);
 388   ShowKeyboardInternal();
 389 }
 390
 391 void KeyboardController::OnWindowHierarchyChanged(
 392     const HierarchyChangeParams& params) {
 393   if (params.new_parent && params.target == container_.get())
 394     OnTextInputStateChanged(proxy_->GetInputMethod()->GetTextInputClient());
 395 }
 396
 397 void KeyboardController::Reload() {
 398   if (proxy_->HasKeyboardWindow()) {
 399     // A reload should never try to show virtual keyboard. If keyboard is not
 400     // visible before reload, it should keep invisible after reload.
 401     show_on_resize_ = false;
 402     proxy_->ReloadKeyboardIfNeeded();
 403   }
 404 }
 405
 406 void KeyboardController::OnTextInputStateChanged(
 407     const ui::TextInputClient* client) {
 408   if (!container_.get())
 409     return;
 410
 411   if (IsKeyboardUsabilityExperimentEnabled()) {
 412     ShowKeyboardInternal();
 413     return;
 414   }
 415
 416   type_ = client ? client->GetTextInputType() : ui::TEXT_INPUT_TYPE_NONE;
 417
 418   if (type_ == ui::TEXT_INPUT_TYPE_NONE && !lock_keyboard_) {
 419     if (keyboard_visible_) {
 420       // Set the visibility state here so that any queries for visibility
 421       // before the timer fires returns the correct future value.
 422       keyboard_visible_ = false;
 423       base::MessageLoop::current()->PostDelayedTask(
 424           FROM_HERE,
 425           base::Bind(&KeyboardController::HideKeyboard,
 426                      weak_factory_.GetWeakPtr(), HIDE_REASON_AUTOMATIC),
 427           base::TimeDelta::FromMilliseconds(kHideKeyboardDelayMs));
 428     }
 429   } else {
 430     // Abort a pending keyboard hide.
 431     if (WillHideKeyboard()) {
 432       weak_factory_.InvalidateWeakPtrs();
 433       keyboard_visible_ = true;
 434     }
 435     proxy_->SetUpdateInputType(type_);
 436     // Do not explicitly show the Virtual keyboard unless it is in the process
 437     // of hiding. Instead, the virtual keyboard is shown in response to a user
 438     // gesture (mouse or touch) that is received while an element has input
 439     // focus. Showing the keyboard requires an explicit call to
 440     // OnShowImeIfNeeded.
 441   }
 442 }
 443
 444 void KeyboardController::OnInputMethodDestroyed(
 445     const ui::InputMethod* input_method) {
 446   DCHECK_EQ(input_method_, input_method);
 447   input_method_ = NULL;
 448 }
 449
 450 void KeyboardController::OnShowImeIfNeeded() {
 451   ShowKeyboardInternal();
 452 }
 453
 454 void KeyboardController::UpdateWindowInsets(aura::Window* window) {
 455   aura::Window *keyboard_window = proxy_->GetKeyboardWindow();
 456   if (window == keyboard_window)
 457     return;
 458
 459   bool enableInsets = (keyboard_window->GetRootWindow() ==
 460       window->GetRootWindow()) && keyboard::IsKeyboardOverscrollEnabled() &&
 461       proxy_->GetKeyboardWindow()->IsVisible();
 462
 463   scoped_ptr<content::RenderWidgetHostIterator> widgets(
 464       content::RenderWidgetHost::GetRenderWidgetHosts());
 465   while (content::RenderWidgetHost* widget = widgets->GetNextHost()) {
 466     content::RenderWidgetHostView* view = widget->GetView();
 467     if (view && window->Contains(view->GetNativeView())) {
 468       gfx::Rect window_bounds = view->GetNativeView()->GetBoundsInScreen();
 469       gfx::Rect intersect = gfx::IntersectRects(window_bounds,
 470           proxy_->GetKeyboardWindow()->bounds());
 471       int overlap = enableInsets ? intersect.height() : 0;
 472       if (overlap > 0 && overlap < window_bounds.height())
 473         view->SetInsets(gfx::Insets(0, 0, overlap, 0));
 474       else
 475         view->SetInsets(gfx::Insets());
 476       return;
 477     }
 478   }
 479 }
 480
 481 void KeyboardController::ShowKeyboardInternal() {
 482   if (!container_.get())
 483     return;
 484
 485   if (container_->children().empty()) {
 486     keyboard::MarkKeyboardLoadStarted();
 487     aura::Window* keyboard = proxy_->GetKeyboardWindow();
 488     keyboard->Show();
 489     container_->AddChild(keyboard);
 490     keyboard->set_owned_by_parent(false);
 491   }
 492
 493   proxy_->ReloadKeyboardIfNeeded();
 494
 495   if (keyboard_visible_) {
 496     return;
 497   } else if (proxy_->GetKeyboardWindow()->bounds().height() == 0) {
 498     show_on_resize_ = true;
 499     return;
 500   }
 501
 502   keyboard_visible_ = true;
 503
 504   // If the controller is in the process of hiding the keyboard, do not log
 505   // the stat here since the keyboard will not actually be shown.
 506   if (!WillHideKeyboard())
 507     keyboard::LogKeyboardControlEvent(keyboard::KEYBOARD_CONTROL_SHOW);
 508
 509   weak_factory_.InvalidateWeakPtrs();
 510
 511   // If |container_| has hide animation, its visibility is set to false when
 512   // hide animation finished. So even if the container is visible at this
 513   // point, it may in the process of hiding. We still need to show keyboard
 514   // container in this case.
 515   if (container_->IsVisible() &&
 516       !container_->layer()->GetAnimator()->is_animating())
 517     return;
 518
 519   ToggleTouchEventLogging(false);
 520   ui::LayerAnimator* container_animator = container_->layer()->GetAnimator();
 521
 522   // If the container is not animating, makes sure the position and opacity
 523   // are at begin states for animation.
 524   if (!container_animator->is_animating()) {
 525     gfx::Transform transform;
 526     transform.Translate(0, proxy_->GetKeyboardWindow()->bounds().height());
 527     container_->SetTransform(transform);
 528     container_->layer()->SetOpacity(kAnimationStartOrAfterHideOpacity);
 529   }
 530
 531   container_animator->set_preemption_strategy(
 532       ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
 533   animation_observer_.reset(new CallbackAnimationObserver(
 534       container_animator,
 535       base::Bind(&KeyboardController::ShowAnimationFinished,
 536                  base::Unretained(this))));
 537   container_animator->AddObserver(animation_observer_.get());
 538
 539   proxy_->ShowKeyboardContainer(container_.get());
 540
 541   {
 542     // Scope the following animation settings as we don't want to animate
 543     // visibility change that triggered by a call to the base class function
 544     // ShowKeyboardContainer with these settings. The container should become
 545     // visible immediately.
 546     ui::ScopedLayerAnimationSettings settings(container_animator);
 547     settings.SetTweenType(gfx::Tween::LINEAR_OUT_SLOW_IN);
 548     settings.SetTransitionDuration(
 549         base::TimeDelta::FromMilliseconds(kShowAnimationDurationMs));
 550     container_->SetTransform(gfx::Transform());
 551     container_->layer()->SetOpacity(1.0);
 552   }
 553 }
 554
 555 void KeyboardController::ResetWindowInsets() {
 556   const gfx::Insets insets;
 557   scoped_ptr<content::RenderWidgetHostIterator> widgets(
 558       content::RenderWidgetHost::GetRenderWidgetHosts());
 559   while (content::RenderWidgetHost* widget = widgets->GetNextHost()) {
 560     content::RenderWidgetHostView* view = widget->GetView();
 561     if (view)
 562       view->SetInsets(insets);
 563   }
 564   window_bounds_observer_->RemoveAllObservedWindows();
 565 }
 566
 567 bool KeyboardController::WillHideKeyboard() const {
 568   return weak_factory_.HasWeakPtrs();
 569 }
 570
 571 void KeyboardController::ShowAnimationFinished() {
 572   // Notify observers after animation finished to prevent reveal desktop
 573   // background during animation.
 574   NotifyKeyboardBoundsChanging(proxy_->GetKeyboardWindow()->bounds());
 575   proxy_->EnsureCaretInWorkArea();
 576 }
 577
 578 void KeyboardController::HideAnimationFinished() {
 579   proxy_->HideKeyboardContainer(container_.get());
 580 }
 581
 582 void KeyboardController::AddBoundsChangedObserver(aura::Window* window) {
 583   aura::Window* target_window = GetFrameWindow(window);
 584   if (target_window)
 585     window_bounds_observer_->AddObservedWindow(target_window);
 586 }
 587
 588 }  // namespace keyboard