// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/app_list/views/app_list_view.h"

#include <algorithm>

#include "base/command_line.h"
#include "base/macros.h"
#include "base/metrics/histogram.h"
#include "base/profiler/scoped_tracker.h"
#include "base/strings/string_util.h"
#include "base/win/windows_version.h"
#include "build/build_config.h"
#include "ui/app_list/app_list_constants.h"
#include "ui/app_list/app_list_model.h"
#include "ui/app_list/app_list_switches.h"
#include "ui/app_list/app_list_view_delegate.h"
#include "ui/app_list/speech_ui_model.h"
#include "ui/app_list/views/app_list_background.h"
#include "ui/app_list/views/app_list_folder_view.h"
#include "ui/app_list/views/app_list_main_view.h"
#include "ui/app_list/views/app_list_view_observer.h"
#include "ui/app_list/views/apps_container_view.h"
#include "ui/app_list/views/contents_view.h"
#include "ui/app_list/views/custom_launcher_page_view.h"
#include "ui/app_list/views/search_box_view.h"
#include "ui/app_list/views/speech_view.h"
#include "ui/app_list/views/start_page_view.h"
#include "ui/base/ui_base_switches.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_animation_observer.h"
#include "ui/compositor/scoped_layer_animation_settings.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/path.h"
#include "ui/gfx/skia_util.h"
#include "ui/resources/grit/ui_resources.h"
#include "ui/views/bubble/bubble_frame_view.h"
#include "ui/views/controls/image_view.h"
#include "ui/views/controls/textfield/textfield.h"
#include "ui/views/layout/fill_layout.h"
#include "ui/views/views_delegate.h"
#include "ui/views/widget/widget.h"

#if defined(USE_AURA)
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host.h"
#include "ui/views/bubble/bubble_window_targeter.h"
#include "ui/wm/core/masked_window_targeter.h"
#if defined(OS_WIN)
#include "ui/base/win/shell.h"
#endif
#if !defined(OS_CHROMEOS)
#include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
#endif
#endif  // defined(USE_AURA)

namespace app_list {

namespace {

// The margin from the edge to the speech UI.
const int kSpeechUIMargin = 12;

// The vertical position for the appearing animation of the speech UI.
const float kSpeechUIAppearingPosition = 12;

// The distance between the arrow tip and edge of the anchor view.
const int kArrowOffset = 10;

// Determines whether the current environment supports shadows bubble borders.
bool SupportsShadow() {
#if defined(OS_WIN)
  // Shadows are not supported on Windows without Aero Glass.
  if (!ui::win::IsAeroGlassEnabled() ||
      base::CommandLine::ForCurrentProcess()->HasSwitch(
          ::switches::kDisableDwmComposition)) {
    return false;
  }
#elif defined(OS_LINUX) && !defined(OS_CHROMEOS)
  // Shadows are not supported on (non-ChromeOS) Linux.
  return false;
#endif
  return true;
}

// This view forwards the focus to the search box widget by providing it as a
// FocusTraversable when a focus search is provided.
class SearchBoxFocusHost : public views::View {
 public:
  explicit SearchBoxFocusHost(views::Widget* search_box_widget)
      : search_box_widget_(search_box_widget) {}

  ~SearchBoxFocusHost() override {}

  views::FocusTraversable* GetFocusTraversable() override {
    return search_box_widget_;
  }

 private:
  views::Widget* search_box_widget_;

  DISALLOW_COPY_AND_ASSIGN(SearchBoxFocusHost);
};

// The view for the App List overlay, which appears as a white rounded
// rectangle with the given radius.
class AppListOverlayView : public views::View {
 public:
  explicit AppListOverlayView(int corner_radius)
      : corner_radius_(corner_radius) {
    SetPaintToLayer(true);
    SetVisible(false);
    layer()->SetOpacity(0.0f);
  }

  ~AppListOverlayView() override {}

  // Overridden from views::View:
  void OnPaint(gfx::Canvas* canvas) override {
    SkPaint paint;
    paint.setStyle(SkPaint::kFill_Style);
    paint.setColor(SK_ColorWHITE);
    canvas->DrawRoundRect(GetContentsBounds(), corner_radius_, paint);
  }

 private:
  const int corner_radius_;

  DISALLOW_COPY_AND_ASSIGN(AppListOverlayView);
};

#if defined(USE_AURA)
// An event targeter for the search box widget which will ignore events that
// are on the search box's shadow.
class SearchBoxWindowTargeter : public wm::MaskedWindowTargeter {
 public:
  explicit SearchBoxWindowTargeter(views::View* search_box)
      : wm::MaskedWindowTargeter(search_box->GetWidget()->GetNativeWindow()),
        search_box_(search_box) {}
  ~SearchBoxWindowTargeter() override {}

 private:
  // wm::MaskedWindowTargeter:
  bool GetHitTestMask(aura::Window* window, gfx::Path* mask) const override {
    mask->addRect(gfx::RectToSkRect(search_box_->GetContentsBounds()));
    return true;
  }

  views::View* search_box_;

  DISALLOW_COPY_AND_ASSIGN(SearchBoxWindowTargeter);
};
#endif

}  // namespace

// An animation observer to hide the view at the end of the animation.
class HideViewAnimationObserver : public ui::ImplicitAnimationObserver {
 public:
  HideViewAnimationObserver()
      : frame_(NULL),
        target_(NULL) {
  }

  ~HideViewAnimationObserver() override {
    if (target_)
      StopObservingImplicitAnimations();
  }

  void SetTarget(views::View* target) {
    if (target_)
      StopObservingImplicitAnimations();
    target_ = target;
  }

  void set_frame(views::BubbleFrameView* frame) { frame_ = frame; }

 private:
  // Overridden from ui::ImplicitAnimationObserver:
  void OnImplicitAnimationsCompleted() override {
    if (target_) {
      target_->SetVisible(false);
      target_ = NULL;

      // Should update the background by invoking SchedulePaint().
      if (frame_)
        frame_->SchedulePaint();
    }
  }

  views::BubbleFrameView* frame_;
  views::View* target_;

  DISALLOW_COPY_AND_ASSIGN(HideViewAnimationObserver);
};

////////////////////////////////////////////////////////////////////////////////
// AppListView:

AppListView::AppListView(AppListViewDelegate* delegate)
    : delegate_(delegate),
      app_list_main_view_(nullptr),
      speech_view_(nullptr),
      search_box_focus_host_(nullptr),
      search_box_widget_(nullptr),
      search_box_view_(nullptr),
      overlay_view_(nullptr),
      animation_observer_(new HideViewAnimationObserver()) {
  CHECK(delegate);

  delegate_->AddObserver(this);
  delegate_->GetSpeechUI()->AddObserver(this);
}

AppListView::~AppListView() {
  delegate_->GetSpeechUI()->RemoveObserver(this);
  delegate_->RemoveObserver(this);
  animation_observer_.reset();
  // Remove child views first to ensure no remaining dependencies on delegate_.
  RemoveAllChildViews(true);
}

void AppListView::InitAsBubbleAttachedToAnchor(
    gfx::NativeView parent,
    int initial_apps_page,
    views::View* anchor,
    const gfx::Vector2d& anchor_offset,
    views::BubbleBorder::Arrow arrow,
    bool border_accepts_events) {
  SetAnchorView(anchor);
  InitAsBubbleInternal(
      parent, initial_apps_page, arrow, border_accepts_events, anchor_offset);
}

void AppListView::InitAsBubbleAtFixedLocation(
    gfx::NativeView parent,
    int initial_apps_page,
    const gfx::Point& anchor_point_in_screen,
    views::BubbleBorder::Arrow arrow,
    bool border_accepts_events) {
  SetAnchorView(NULL);
  SetAnchorRect(gfx::Rect(anchor_point_in_screen, gfx::Size()));
  InitAsBubbleInternal(
      parent, initial_apps_page, arrow, border_accepts_events, gfx::Vector2d());
}

void AppListView::InitAsFramelessWindow(gfx::NativeView parent,
                                        int initial_apps_page,
                                        gfx::Rect bounds) {
  InitContents(parent, initial_apps_page);
  overlay_view_ = new AppListOverlayView(0 /* no corners */);
  AddChildView(overlay_view_);

  views::Widget* widget = new views::Widget();
  views::Widget::InitParams params(
      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
  params.parent = parent;
  params.delegate = this;
  widget->Init(params);
  widget->SetBounds(bounds);
  // This needs to be set *after* Widget::Init() because BubbleDelegateView sets
  // its own background at OnNativeThemeChanged(), which is called in
  // View::AddChildView() which is called at Widget::SetContentsView() to build
  // the views hierarchy in the widget.
  set_background(new AppListBackground(0));

  InitChildWidgets();
}

void AppListView::SetBubbleArrow(views::BubbleBorder::Arrow arrow) {
  GetBubbleFrameView()->bubble_border()->set_arrow(arrow);
  SizeToContents();  // Recalcuates with new border.
  GetBubbleFrameView()->SchedulePaint();
}

void AppListView::SetAnchorPoint(const gfx::Point& anchor_point) {
  SetAnchorRect(gfx::Rect(anchor_point, gfx::Size()));
}

void AppListView::SetDragAndDropHostOfCurrentAppList(
    ApplicationDragAndDropHost* drag_and_drop_host) {
  app_list_main_view_->SetDragAndDropHostOfCurrentAppList(drag_and_drop_host);
}

void AppListView::ShowWhenReady() {
  app_list_main_view_->ShowAppListWhenReady();
}

void AppListView::Close() {
  app_list_main_view_->Close();
  delegate_->Dismiss();
}

void AppListView::UpdateBounds() {
  SizeToContents();
}

void AppListView::SetAppListOverlayVisible(bool visible) {
  DCHECK(overlay_view_);

  // Display the overlay immediately so we can begin the animation.
  overlay_view_->SetVisible(true);

  ui::ScopedLayerAnimationSettings settings(
      overlay_view_->layer()->GetAnimator());
  settings.SetTweenType(gfx::Tween::LINEAR);

  // If we're dismissing the overlay, hide the view at the end of the animation.
  if (!visible) {
    // Since only one animation is visible at a time, it's safe to re-use
    // animation_observer_ here.
    animation_observer_->set_frame(NULL);
    animation_observer_->SetTarget(overlay_view_);
    settings.AddObserver(animation_observer_.get());
  }

  const float kOverlayFadeInMilliseconds = 125;
  settings.SetTransitionDuration(
      base::TimeDelta::FromMilliseconds(kOverlayFadeInMilliseconds));

  const float kOverlayOpacity = 0.75f;
  overlay_view_->layer()->SetOpacity(visible ? kOverlayOpacity : 0.0f);
  // Create the illusion that the search box is hidden behind the app list
  // overlay mask by setting its opacity to the same value, and disabling it.
  {
    ui::ScopedLayerAnimationSettings settings(
        search_box_widget_->GetLayer()->GetAnimator());
    const float kSearchBoxWidgetOpacity = 0.5f;
    search_box_widget_->GetLayer()->SetOpacity(visible ? kSearchBoxWidgetOpacity
                                                       : 1.0f);
    search_box_view_->SetEnabled(!visible);
    if (!visible)
      search_box_view_->search_box()->RequestFocus();
  }
}

bool AppListView::ShouldCenterWindow() const {
  return delegate_->ShouldCenterWindow();
}

gfx::Size AppListView::GetPreferredSize() const {
  return app_list_main_view_->GetPreferredSize();
}

void AppListView::OnPaint(gfx::Canvas* canvas) {
  views::BubbleDelegateView::OnPaint(canvas);
  if (!next_paint_callback_.is_null()) {
    next_paint_callback_.Run();
    next_paint_callback_.Reset();
  }
}

void AppListView::OnThemeChanged() {
#if defined(OS_WIN)
  GetWidget()->Close();
#endif
}

bool AppListView::ShouldHandleSystemCommands() const {
  return true;
}

bool AppListView::ShouldDescendIntoChildForEventHandling(
    gfx::NativeView child,
    const gfx::Point& location) {
  // While on the start page, don't descend into the custom launcher page. Since
  // the only valid action is to open it.
  ContentsView* contents_view = app_list_main_view_->contents_view();
  if (contents_view->custom_page_view() &&
      contents_view->GetActiveState() == AppListModel::STATE_START)
    return !contents_view->custom_page_view()
                ->GetCollapsedLauncherPageBounds()
                .Contains(location);

  return views::BubbleDelegateView::ShouldDescendIntoChildForEventHandling(
      child, location);
}

void AppListView::Prerender() {
  app_list_main_view_->Prerender();
}

void AppListView::OnProfilesChanged() {
  app_list_main_view_->search_box_view()->InvalidateMenu();
}

void AppListView::OnShutdown() {
  // Nothing to do on views - the widget will soon be closed, which will tear
  // everything down.
}

void AppListView::SetProfileByPath(const base::FilePath& profile_path) {
  delegate_->SetProfileByPath(profile_path);
  app_list_main_view_->ModelChanged();
}

void AppListView::AddObserver(AppListViewObserver* observer) {
  observers_.AddObserver(observer);
}

void AppListView::RemoveObserver(AppListViewObserver* observer) {
  observers_.RemoveObserver(observer);
}

// static
void AppListView::SetNextPaintCallback(const base::Closure& callback) {
  next_paint_callback_ = callback;
}

#if defined(OS_WIN)
HWND AppListView::GetHWND() const {
  gfx::NativeWindow window =
      GetWidget()->GetTopLevelWidget()->GetNativeWindow();
  return window->GetHost()->GetAcceleratedWidget();
}
#endif

PaginationModel* AppListView::GetAppsPaginationModel() {
  return app_list_main_view_->contents_view()
      ->apps_container_view()
      ->apps_grid_view()
      ->pagination_model();
}

void AppListView::InitContents(gfx::NativeView parent, int initial_apps_page) {
  // TODO(vadimt): Remove ScopedTracker below once crbug.com/440224 and
  // crbug.com/441028 are fixed.
  tracked_objects::ScopedTracker tracking_profile(
      FROM_HERE_WITH_EXPLICIT_FUNCTION(
          "440224, 441028 AppListView::InitContents"));

  app_list_main_view_ = new AppListMainView(delegate_);
  AddChildView(app_list_main_view_);
  app_list_main_view_->SetPaintToLayer(true);
  app_list_main_view_->SetFillsBoundsOpaquely(false);
  app_list_main_view_->layer()->SetMasksToBounds(true);

  // This will be added to the |search_box_widget_| after the app list widget is
  // initialized.
  search_box_view_ = new SearchBoxView(app_list_main_view_, delegate_);
  search_box_view_->SetPaintToLayer(true);
  search_box_view_->SetFillsBoundsOpaquely(false);
  search_box_view_->layer()->SetMasksToBounds(true);

  // TODO(vadimt): Remove ScopedTracker below once crbug.com/440224 and
  // crbug.com/441028 are fixed.
  tracked_objects::ScopedTracker tracking_profile1(
      FROM_HERE_WITH_EXPLICIT_FUNCTION(
          "440224, 441028 AppListView::InitContents1"));

  app_list_main_view_->Init(parent, initial_apps_page, search_box_view_);

  // TODO(vadimt): Remove ScopedTracker below once crbug.com/440224 and
  // crbug.com/441028 are fixed.
  tracked_objects::ScopedTracker tracking_profile2(
      FROM_HERE_WITH_EXPLICIT_FUNCTION(
          "440224, 441028 AppListView::InitContents2"));

  // Speech recognition is available only when the start page exists.
  if (delegate_ && delegate_->IsSpeechRecognitionEnabled()) {
    speech_view_ = new SpeechView(delegate_);
    speech_view_->SetVisible(false);
    speech_view_->SetPaintToLayer(true);
    speech_view_->SetFillsBoundsOpaquely(false);
    speech_view_->layer()->SetOpacity(0.0f);
    AddChildView(speech_view_);
  }

  OnProfilesChanged();
}

void AppListView::InitChildWidgets() {
  DCHECK(search_box_view_);

  // Create the search box widget.
  views::Widget::InitParams search_box_widget_params(
      views::Widget::InitParams::TYPE_CONTROL);
  search_box_widget_params.parent = GetWidget()->GetNativeView();
  search_box_widget_params.opacity =
      views::Widget::InitParams::TRANSLUCENT_WINDOW;

  // Create a widget for the SearchBoxView to live in. This allows the
  // SearchBoxView to be on top of the custom launcher page's WebContents
  // (otherwise the search box events will be captured by the WebContents).
  search_box_widget_ = new views::Widget;
  search_box_widget_->Init(search_box_widget_params);
  search_box_widget_->SetContentsView(search_box_view_);

  // The search box will not naturally receive focus by itself (because it is in
  // a separate widget). Create this SearchBoxFocusHost in the main widget to
  // forward the focus search into to the search box.
  search_box_focus_host_ = new SearchBoxFocusHost(search_box_widget_);
  AddChildView(search_box_focus_host_);
  search_box_widget_->SetFocusTraversableParentView(search_box_focus_host_);
  search_box_widget_->SetFocusTraversableParent(
      GetWidget()->GetFocusTraversable());

#if defined(USE_AURA)
  // Mouse events on the search box shadow should not be captured.
  aura::Window* window = search_box_widget_->GetNativeWindow();
  window->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
      new SearchBoxWindowTargeter(search_box_view_)));
#endif

  app_list_main_view_->contents_view()->Layout();
}

void AppListView::InitAsBubbleInternal(gfx::NativeView parent,
                                       int initial_apps_page,
                                       views::BubbleBorder::Arrow arrow,
                                       bool border_accepts_events,
                                       const gfx::Vector2d& anchor_offset) {
  base::Time start_time = base::Time::Now();

  InitContents(parent, initial_apps_page);

  set_color(kContentsBackgroundColor);
  set_margins(gfx::Insets());
  set_parent_window(parent);
  set_close_on_deactivate(false);
  set_close_on_esc(false);
  set_anchor_view_insets(gfx::Insets(kArrowOffset + anchor_offset.y(),
                                     kArrowOffset + anchor_offset.x(),
                                     kArrowOffset - anchor_offset.y(),
                                     kArrowOffset - anchor_offset.x()));
  set_border_accepts_events(border_accepts_events);
  set_shadow(SupportsShadow() ? views::BubbleBorder::BIG_SHADOW
                              : views::BubbleBorder::NO_SHADOW_OPAQUE_BORDER);

  {
    // TODO(tapted): Remove ScopedTracker below once crbug.com/431326 is fixed.
    tracked_objects::ScopedTracker tracking_profile(
        FROM_HERE_WITH_EXPLICIT_FUNCTION(
            "431326 views::BubbleDelegateView::CreateBubble()"));

    // This creates the app list widget. (Before this, child widgets cannot be
    // created.)
    views::BubbleDelegateView::CreateBubble(this);
  }

  SetBubbleArrow(arrow);

  // We can now create the internal widgets.
  InitChildWidgets();

#if defined(USE_AURA)
  aura::Window* window = GetWidget()->GetNativeWindow();
  window->layer()->SetMasksToBounds(true);
  GetBubbleFrameView()->set_background(new AppListBackground(
      GetBubbleFrameView()->bubble_border()->GetBorderCornerRadius()));
  set_background(NULL);
  window->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
      new views::BubbleWindowTargeter(this)));
#else
  set_background(new AppListBackground(
      GetBubbleFrameView()->bubble_border()->GetBorderCornerRadius()));

  // On non-aura the bubble has two widgets, and it's possible for the border
  // to be shown independently in odd situations. Explicitly hide the bubble
  // widget to ensure that any WM_WINDOWPOSCHANGED messages triggered by the
  // window manager do not have the SWP_SHOWWINDOW flag set which would cause
  // the border to be shown. See http://crbug.com/231687 .
  GetWidget()->Hide();
#endif

  // On platforms that don't support a shadow, the rounded border of the app
  // list is constructed _inside_ the view, so a rectangular background goes
  // over the border in the rounded corners. To fix this, give the background a
  // corner radius 1px smaller than the outer border, so it just reaches but
  // doesn't cover it.
  const int kOverlayCornerRadius =
      GetBubbleFrameView()->bubble_border()->GetBorderCornerRadius();
  overlay_view_ =
      new AppListOverlayView(kOverlayCornerRadius - (SupportsShadow() ? 0 : 1));
  overlay_view_->SetBoundsRect(GetContentsBounds());
  AddChildView(overlay_view_);

  if (delegate_)
    delegate_->ViewInitialized();

  UMA_HISTOGRAM_TIMES("Apps.AppListCreationTime",
                      base::Time::Now() - start_time);
}

void AppListView::OnBeforeBubbleWidgetInit(
    views::Widget::InitParams* params,
    views::Widget* widget) const {
  if (!params->native_widget) {
    views::ViewsDelegate* views_delegate = views::ViewsDelegate::GetInstance();
    if (views_delegate && !views_delegate->native_widget_factory().is_null()) {
      params->native_widget =
          views_delegate->native_widget_factory().Run(*params, widget);
    }
  }
#if defined(USE_AURA) && !defined(OS_CHROMEOS)
  if (!params->native_widget && delegate_ && delegate_->ForceNativeDesktop())
    params->native_widget = new views::DesktopNativeWidgetAura(widget);
#endif
#if defined(OS_WIN)
  // Windows 7 and higher offer pinning to the taskbar, but we need presence
  // on the taskbar for the user to be able to pin us. So, show the window on
  // the taskbar for these versions of Windows.
  if (base::win::GetVersion() >= base::win::VERSION_WIN7)
    params->force_show_in_taskbar = true;
#elif defined(OS_LINUX)
  // Set up a custom WM_CLASS for the app launcher window. This allows task
  // switchers in X11 environments to distinguish it from main browser windows.
  params->wm_class_name = kAppListWMClass;
  // Show the window in the taskbar, even though it is a bubble, which would not
  // normally be shown.
  params->force_show_in_taskbar = true;
#endif
}

views::View* AppListView::GetInitiallyFocusedView() {
  return app_list_main_view_->search_box_view()->search_box();
}

gfx::ImageSkia AppListView::GetWindowIcon() {
  if (delegate_)
    return delegate_->GetWindowIcon();

  return gfx::ImageSkia();
}

bool AppListView::WidgetHasHitTestMask() const {
  return GetBubbleFrameView() != nullptr;
}

void AppListView::GetWidgetHitTestMask(gfx::Path* mask) const {
  DCHECK(mask);
  DCHECK(GetBubbleFrameView());

  mask->addRect(gfx::RectToSkRect(
      GetBubbleFrameView()->GetContentsBounds()));
}

bool AppListView::AcceleratorPressed(const ui::Accelerator& accelerator) {
  // The accelerator is added by BubbleDelegateView.
  if (accelerator.key_code() == ui::VKEY_ESCAPE) {
    if (switches::IsExperimentalAppListEnabled()) {
      // If the ContentsView does not handle the back action, then this is the
      // top level, so we close the app list.
      if (!app_list_main_view_->contents_view()->Back()) {
        GetWidget()->Deactivate();
        Close();
      }
      return true;
    }

    if (app_list_main_view_->search_box_view()->HasSearch()) {
      app_list_main_view_->search_box_view()->ClearSearch();
    } else if (app_list_main_view_->contents_view()
                   ->apps_container_view()
                   ->IsInFolderView()) {
      app_list_main_view_->contents_view()
          ->apps_container_view()
          ->app_list_folder_view()
          ->CloseFolderPage();
      return true;
    } else {
      GetWidget()->Deactivate();
      Close();
    }
    return true;
  }

  return false;
}

void AppListView::Layout() {
  const gfx::Rect contents_bounds = GetContentsBounds();

  // Make sure to layout |app_list_main_view_| and |speech_view_| at the center
  // of the widget.
  gfx::Rect centered_bounds = contents_bounds;
  centered_bounds.ClampToCenteredSize(gfx::Size(
      app_list_main_view_->contents_view()->GetDefaultContentsBounds().width(),
      contents_bounds.height()));

  app_list_main_view_->SetBoundsRect(centered_bounds);

  if (speech_view_) {
    gfx::Rect speech_bounds = centered_bounds;
    int preferred_height = speech_view_->GetPreferredSize().height();
    speech_bounds.Inset(kSpeechUIMargin, kSpeechUIMargin);
    speech_bounds.set_height(std::min(speech_bounds.height(),
                                      preferred_height));
    speech_bounds.Inset(-speech_view_->GetInsets());
    speech_view_->SetBoundsRect(speech_bounds);
  }
}

void AppListView::SchedulePaintInRect(const gfx::Rect& rect) {
  BubbleDelegateView::SchedulePaintInRect(rect);
  if (GetBubbleFrameView())
    GetBubbleFrameView()->SchedulePaint();
}

void AppListView::OnWidgetDestroying(views::Widget* widget) {
  BubbleDelegateView::OnWidgetDestroying(widget);
  if (delegate_ && widget == GetWidget())
    delegate_->ViewClosing();
}

void AppListView::OnWidgetActivationChanged(views::Widget* widget,
                                            bool active) {
  // Do not called inherited function as the bubble delegate auto close
  // functionality is not used.
  if (widget == GetWidget())
    FOR_EACH_OBSERVER(AppListViewObserver, observers_,
                      OnActivationChanged(widget, active));
}

void AppListView::OnWidgetVisibilityChanged(views::Widget* widget,
                                            bool visible) {
  BubbleDelegateView::OnWidgetVisibilityChanged(widget, visible);

  if (widget != GetWidget())
    return;

  if (!visible)
    app_list_main_view_->ResetForShow();
}

void AppListView::OnSpeechRecognitionStateChanged(
    SpeechRecognitionState new_state) {
  if (!speech_view_)
    return;

  bool will_appear = (new_state == SPEECH_RECOGNITION_RECOGNIZING ||
                      new_state == SPEECH_RECOGNITION_IN_SPEECH ||
                      new_state == SPEECH_RECOGNITION_NETWORK_ERROR);
  // No change for this class.
  if (speech_view_->visible() == will_appear)
    return;

  if (will_appear)
    speech_view_->Reset();

  animation_observer_->set_frame(GetBubbleFrameView());
  gfx::Transform speech_transform;
  speech_transform.Translate(
      0, SkFloatToMScalar(kSpeechUIAppearingPosition));
  if (will_appear)
    speech_view_->layer()->SetTransform(speech_transform);

  {
    ui::ScopedLayerAnimationSettings main_settings(
        app_list_main_view_->layer()->GetAnimator());
    if (will_appear) {
      animation_observer_->SetTarget(app_list_main_view_);
      main_settings.AddObserver(animation_observer_.get());
    }
    app_list_main_view_->layer()->SetOpacity(will_appear ? 0.0f : 1.0f);
  }

  {
    ui::ScopedLayerAnimationSettings search_box_settings(
        search_box_widget_->GetLayer()->GetAnimator());
    search_box_widget_->GetLayer()->SetOpacity(will_appear ? 0.0f : 1.0f);
  }

  {
    ui::ScopedLayerAnimationSettings speech_settings(
        speech_view_->layer()->GetAnimator());
    if (!will_appear) {
      animation_observer_->SetTarget(speech_view_);
      speech_settings.AddObserver(animation_observer_.get());
    }

    speech_view_->layer()->SetOpacity(will_appear ? 1.0f : 0.0f);
    if (will_appear)
      speech_view_->layer()->SetTransform(gfx::Transform());
    else
      speech_view_->layer()->SetTransform(speech_transform);
  }

  // Prevent the search box from receiving events when hidden.
  search_box_view_->SetEnabled(!will_appear);

  if (will_appear) {
    speech_view_->SetVisible(true);
  } else {
    app_list_main_view_->SetVisible(true);
    // Refocus the search box. However, if the app list widget does not have
    // focus, it means another window has already taken focus, and we *must not*
    // focus the search box (or we would steal focus back into the app list).
    if (GetWidget()->IsActive())
      search_box_view_->search_box()->RequestFocus();
  }
}

}  // namespace app_list