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// 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 <map>
#include <memory>
#include <utility>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "ui/app_list/app_list_export.h"
#include "ui/app_list/app_list_model.h"
#include "ui/app_list/pagination_model.h"
#include "ui/app_list/pagination_model_observer.h"
#include "ui/views/view.h"
#include "ui/views/view_model.h"
namespace gfx {
class Rect;
namespace app_list {
class AppsGridView;
class AppListPage;
class ApplicationDragAndDropHost;
class AppListFolderItem;
class AppListMainView;
class AppsContainerView;
class CustomLauncherPageView;
class PaginationModel;
class SearchBoxView;
class SearchResultPageView;
class StartPageView;
// A view to manage launcher pages within the Launcher (eg. start page, apps
// grid view, search results). There can be any number of launcher pages, only
// one of which can be active at a given time. ContentsView provides the user
// interface for switching between launcher pages, and animates the transition
// between them.
class APP_LIST_EXPORT ContentsView : public views::View,
public PaginationModelObserver {
explicit ContentsView(AppListMainView* app_list_main_view);
~ContentsView() override;
// Initialize the pages of the launcher. Should be called after
// set_contents_switcher_view().
void Init(AppListModel* model);
// The app list gets closed and drag and drop operations need to be cancelled.
void CancelDrag();
// If |drag_and_drop| is not NULL it will be called upon drag and drop
// operations outside the application list.
void SetDragAndDropHostOfCurrentAppList(
ApplicationDragAndDropHost* drag_and_drop_host);
// Shows/hides the search results. Hiding the search results will cause the
// app list to return to the page that was displayed before
// ShowSearchResults(true) was invoked.
void ShowSearchResults(bool show);
bool IsShowingSearchResults() const;
void ShowFolderContent(AppListFolderItem* folder);
// Sets the active launcher page and animates the pages into place.
void SetActiveState(AppListModel::State state);
void SetActiveState(AppListModel::State state, bool animate);
// The index of the currently active launcher page.
int GetActivePageIndex() const;
// The currently active state.
AppListModel::State GetActiveState() const;
// True if |state| is the current active laucher page.
bool IsStateActive(AppListModel::State state) const;
// Gets the index of a launcher page in |view_model_|, by State. Returns
// -1 if there is no view for |state|.
int GetPageIndexForState(AppListModel::State state) const;
// Gets the state of a launcher page in |view_model_|, by index. Returns
// INVALID_STATE if there is no state for |index|.
AppListModel::State GetStateForPageIndex(int index) const;
int NumLauncherPages() const;
AppsContainerView* apps_container_view() const {
return apps_container_view_;
StartPageView* start_page_view() const { return start_page_view_; }
CustomLauncherPageView* custom_page_view() const { return custom_page_view_; }
SearchResultPageView* search_results_page_view() {
return search_results_page_view_;
AppListPage* GetPageView(int index) const;
SearchBoxView* GetSearchBoxView() const;
AppListMainView* app_list_main_view() const { return app_list_main_view_; }
// Returns the pagination model for the ContentsView.
const PaginationModel& pagination_model() { return pagination_model_; }
// Returns search box bounds to use for content views that do not specify
// their own custom layout.
gfx::Rect GetDefaultSearchBoxBounds() const;
// Returns search box bounds to use for a given state.
gfx::Rect GetSearchBoxBoundsForState(AppListModel::State state) const;
// Returns the content area bounds to use for content views that do not
// specify their own custom layout.
gfx::Rect GetDefaultContentsBounds() const;
// Performs the 'back' action for the active page. Returns whether the action
// was handled.
bool Back();
// Overridden from views::View:
gfx::Size GetPreferredSize() const override;
void Layout() override;
bool OnKeyPressed(const ui::KeyEvent& event) override;
// Overridden from PaginationModelObserver:
void TotalPagesChanged() override;
void SelectedPageChanged(int old_selected, int new_selected) override;
void TransitionStarted() override;
void TransitionChanged() override;
// Sets the active launcher page, accounting for whether the change is for
// search results.
void SetActiveStateInternal(int page_index,
bool show_search_results,
bool animate);
// Invoked when active view is changed.
void ActivePageChanged();
// Returns the size of the default content area.
gfx::Size GetDefaultContentsSize() const;
// Notifies the view delegate that the custom launcher page's animation has
// changed.
void NotifyCustomLauncherPageAnimationChanged(double progress,
int current_page,
int target_page);
// Calculates and sets the bounds for the subviews. If there is currently an
// animation, this positions the views as appropriate for the current frame.
void UpdatePageBounds();
void UpdateSearchBox(double progress,
AppListModel::State current_state,
AppListModel::State target_state);
// Adds |view| as a new page to the end of the list of launcher pages. The
// view is inserted as a child of the ContentsView. There is no name
// associated with the page. Returns the index of the new page.
int AddLauncherPage(AppListPage* view);
// Adds |view| as a new page to the end of the list of launcher pages. The
// view is inserted as a child of the ContentsView. The page is associated
// with the name |state|. Returns the index of the new page.
int AddLauncherPage(AppListPage* view, AppListModel::State state);
// Gets the PaginationModel owned by the AppsGridView.
// Note: This is different to |pagination_model_|, which manages top-level
// launcher-page pagination.
PaginationModel* GetAppsPaginationModel();
// Sub-views of the ContentsView. All owned by the views hierarchy.
AppsContainerView* apps_container_view_;
SearchResultPageView* search_results_page_view_;
StartPageView* start_page_view_;
CustomLauncherPageView* custom_page_view_;
// The child page views. Owned by the views hierarchy.
std::vector<AppListPage*> app_list_pages_;
// Parent view. Owned by the views hierarchy.
AppListMainView* app_list_main_view_;
// Maps State onto |view_model_| indices.
std::map<AppListModel::State, int> state_to_view_;
// Maps |view_model_| indices onto State.
std::map<int, AppListModel::State> view_to_state_;
// The page that was showing before ShowSearchResults(true) was invoked.
int page_before_search_;
// Manages the pagination for the launcher pages.
PaginationModel pagination_model_;
} // namespace app_list