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// Copyright 2016 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 <memory>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "ui/app_list/pagination_model_observer.h"
#include "ui/app_list/presenter/app_list_presenter.h"
#include "ui/app_list/presenter/app_list_presenter_delegate.h"
#include "ui/aura/client/focus_change_observer.h"
#include "ui/aura/window_observer.h"
#include "ui/compositor/layer_animation_observer.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/views/widget/widget_observer.h"
namespace app_list {
class AppListView;
class AppListViewDelegate;
class AppListPresenterDelegateFactory;
namespace test {
class AppListPresenterImplTestApi;
class AppListPresenterImplTest;
class AppListViewDelegate;
// Manages app list UI. Creates AppListView and schedules showing/hiding
// animation. While the UI is visible, it monitors things such as app list
// activation state to auto dismiss the UI. Delegates the responsibility
// for laying out the app list UI to ash::AppListLayoutDelegate.
class APP_LIST_PRESENTER_EXPORT AppListPresenterImpl
: public AppListPresenter,
public aura::client::FocusChangeObserver,
public aura::WindowObserver,
public ui::ImplicitAnimationObserver,
public views::WidgetObserver,
public PaginationModelObserver {
explicit AppListPresenterImpl(AppListPresenterDelegateFactory* factory);
~AppListPresenterImpl() override;
// Returns app list window or NULL if it is not visible.
aura::Window* GetWindow();
// Returns app list view if one exists, or NULL otherwise.
AppListView* GetView() { return view_; }
// AppListPresenter:
void Show(int64_t display_id) override;
void Dismiss() override;
void ToggleAppList(int64_t display_id) override;
bool GetTargetVisibility() const override;
friend class test::AppListPresenterImplTestApi;
// Whether the app list's aura::Window is currently visible.
bool IsVisible() const;
// Sets the app list view and attempts to show it.
void SetView(AppListView* view);
// Forgets the view.
void ResetView();
// Starts show/hide animation.
void ScheduleAnimation();
// aura::client::FocusChangeObserver overrides:
void OnWindowFocused(aura::Window* gained_focus,
aura::Window* lost_focus) override;
// aura::WindowObserver overrides:
void OnWindowBoundsChanged(aura::Window* root,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds) override;
// ui::ImplicitAnimationObserver overrides:
void OnImplicitAnimationsCompleted() override;
// views::WidgetObserver overrides:
void OnWidgetDestroying(views::Widget* widget) override;
// PaginationModelObserver overrides:
void TotalPagesChanged() override;
void SelectedPageChanged(int old_selected, int new_selected) override;
void TransitionStarted() override;
void TransitionChanged() override;
// Not owned
AppListPresenterDelegateFactory* const factory_;
// Responsible for laying out the app list UI.
std::unique_ptr<AppListPresenterDelegate> presenter_delegate_;
// Whether we should show or hide app list widget.
bool is_visible_ = false;
// The AppListView this class manages, owned by its widget.
AppListView* view_ = nullptr;
// The current page of the AppsGridView of |view_|. This is stored outside of
// the view's PaginationModel, so that it persists when the view is destroyed.
int current_apps_page_ = -1;
// Cached bounds of |view_| for snapping back animation after over-scroll.
gfx::Rect view_bounds_;
// Whether should schedule snap back animation.
bool should_snap_back_ = false;
} // namespace app_list