ash/app_list/views/app_list_main_view.cc - chromium/src - Git at Google

 // Copyright 2013 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 "ash/app_list/views/app_list_main_view.h"

 #include <algorithm>
 #include <memory>
 #include <utility>

 #include "ash/app_list/app_list_metrics.h"
 #include "ash/app_list/app_list_view_delegate.h"
 #include "ash/app_list/model/app_list_folder_item.h"
 #include "ash/app_list/model/app_list_item.h"
 #include "ash/app_list/model/app_list_model.h"
 #include "ash/app_list/views/app_list_folder_view.h"
 #include "ash/app_list/views/app_list_item_view.h"
 #include "ash/app_list/views/apps_container_view.h"
 #include "ash/app_list/views/apps_grid_view.h"
 #include "ash/app_list/views/contents_view.h"
 #include "ash/app_list/views/search_box_view.h"
 #include "ash/app_list/views/search_result_base_view.h"
 #include "ash/app_list/views/search_result_page_view.h"
 #include "ash/public/cpp/app_list/app_list_features.h"
 #include "ash/public/cpp/pagination/pagination_model.h"
 #include "ash/search_box/search_box_view_base.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics.h"
 #include "base/strings/string_util.h"
 #include "ui/aura/window.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/views/border.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/textfield/textfield.h"
 #include "ui/views/layout/fill_layout.h"
 #include "ui/views/widget/widget.h"
 #include "ui/wm/public/activation_client.h"

 namespace ash {

 ////////////////////////////////////////////////////////////////////////////////
 // AppListMainView:

 AppListMainView::AppListMainView(AppListViewDelegate* delegate,
                                  AppListView* app_list_view)
     : delegate_(delegate),
       model_(delegate->GetModel()),
       search_model_(delegate->GetSearchModel()),
       app_list_view_(app_list_view) {
   // We need a layer to apply transform to in small display so that the apps
   // grid fits in the display.
   SetPaintToLayer();
   layer()->SetFillsBoundsOpaquely(false);

   model_->AddObserver(this);
 }

 AppListMainView::~AppListMainView() {
   model_->RemoveObserver(this);
 }

 void AppListMainView::Init(int initial_apps_page,
                            SearchBoxView* search_box_view) {
   search_box_view_ = search_box_view;
   AddContentsViews();

   // Switch the apps grid view to the specified page.
   PaginationModel* pagination_model = GetAppsPaginationModel();
   if (pagination_model->is_valid_page(initial_apps_page))
     pagination_model->SelectPage(initial_apps_page, false);
 }

 void AppListMainView::AddContentsViews() {
   DCHECK(search_box_view_);
   auto contents_view = std::make_unique<ContentsView>(app_list_view_);
   contents_view->Init(model_);
   contents_view->SetPaintToLayer(ui::LAYER_NOT_DRAWN);
   contents_view->layer()->SetMasksToBounds(true);
   contents_view_ = AddChildView(std::move(contents_view));

   search_box_view_->set_contents_view(contents_view_);
 }

 void AppListMainView::ShowAppListWhenReady() {
   // After switching to tablet mode, other app windows may be active. Show the
   // app list without activating it to avoid breaking other windows' state.
   const aura::Window* active_window =
       wm::GetActivationClient(
           app_list_view_->GetWidget()->GetNativeView()->GetRootWindow())
           ->GetActiveWindow();
   if (app_list_view_->is_tablet_mode() && active_window)
     GetWidget()->ShowInactive();
   else
     GetWidget()->Show();
 }

 void AppListMainView::ModelChanged() {
   model_->RemoveObserver(this);
   model_ = delegate_->GetModel();
   model_->AddObserver(this);
   search_model_ = delegate_->GetSearchModel();
   search_box_view_->ModelChanged();
   delete contents_view_;
   contents_view_ = nullptr;
   AddContentsViews();
   Layout();
 }

 void AppListMainView::SetDragAndDropHostOfCurrentAppList(
     ApplicationDragAndDropHost* drag_and_drop_host) {
   contents_view_->SetDragAndDropHostOfCurrentAppList(drag_and_drop_host);
 }

 PaginationModel* AppListMainView::GetAppsPaginationModel() {
   return contents_view_->apps_container_view()
       ->apps_grid_view()
       ->pagination_model();
 }

 void AppListMainView::NotifySearchBoxVisibilityChanged() {
   // Repaint the AppListView's background which will repaint the background for
   // the search box. This is needed because this view paints to a layer and
   // won't propagate paints upward.
   if (parent())
     parent()->SchedulePaint();
 }

 const char* AppListMainView::GetClassName() const {
   return "AppListMainView";
 }

 void AppListMainView::Layout() {
   gfx::Rect rect = GetContentsBounds();
   if (!rect.IsEmpty())
     contents_view_->SetBoundsRect(rect);
 }

 void AppListMainView::ActivateApp(AppListItem* item, int event_flags) {
   // TODO(jennyz): Activate the folder via AppListModel notification.
   if (item->GetItemType() == AppListFolderItem::kItemType) {
     contents_view_->ShowFolderContent(static_cast<AppListFolderItem*>(item));
     UMA_HISTOGRAM_ENUMERATION(kAppListFolderOpenedHistogram,
                               kFullscreenAppListFolders, kMaxFolderOpened);
   } else {
     base::RecordAction(base::UserMetricsAction("AppList_ClickOnApp"));

     // Avoid using |item->id()| as the parameter. In some rare situations,
     // activating the item may destruct it. Using the reference to an object
     // which may be destroyed during the procedure as the function parameter
     // may bring the crash like https://crbug.com/990282.
     const std::string id = item->id();
     delegate_->ActivateItem(id, event_flags,
                             AppListLaunchedFrom::kLaunchedFromGrid);
   }
 }

 void AppListMainView::CancelDragInActiveFolder() {
   contents_view_->apps_container_view()
       ->app_list_folder_view()
       ->items_grid_view()
       ->EndDrag(true);
 }

 void AppListMainView::OnResultInstalled(SearchResult* result) {
   // Clears the search to show the apps grid. The last installed app
   // should be highlighted and made visible already.
   search_box_view_->ClearSearch();
 }

 // AppListModelObserver overrides:
 void AppListMainView::OnAppListStateChanged(AppListState new_state,
                                             AppListState old_state) {
   if (new_state == AppListState::kStateEmbeddedAssistant) {
     search_box_view_->SetVisible(false);
   } else {
     search_box_view_->SetVisible(true);
   }
 }

 void AppListMainView::QueryChanged(SearchBoxViewBase* sender) {
   std::u16string raw_query = search_model_->search_box()->text();
   std::u16string query;
   base::TrimWhitespace(raw_query, base::TRIM_ALL, &query);
   contents_view_->ShowSearchResults(search_box_view_->is_search_box_active() ||
                                     !query.empty());

   delegate_->StartSearch(raw_query);
 }

 void AppListMainView::ActiveChanged(SearchBoxViewBase* sender) {
   // Do not update views on closing.
   if (app_list_view_->app_list_state() == AppListViewState::kClosed)
     return;

   if (search_box_view_->is_search_box_active()) {
     // Show zero state suggestions when search box is activated with an empty
     // query.
     std::u16string raw_query = search_model_->search_box()->text();
     std::u16string query;
     base::TrimWhitespace(raw_query, base::TRIM_ALL, &query);
     if (query.empty())
       search_box_view_->ShowZeroStateSuggestions();
   } else {
     // Close the search results page if the search box is inactive.
     contents_view_->ShowSearchResults(false);
   }
 }

 void AppListMainView::SearchBoxFocusChanged(SearchBoxViewBase* sender) {
   // A fake focus (highlight) is always set on the first search result. When the
   // user moves focus from the search box textfield (e.g. to close button or
   // last search result), the fake focus should be removed.
   if (sender->search_box()->HasFocus())
     return;

   SearchResultBaseView* first_result_view =
       contents_view_->search_results_page_view()->first_result_view();
   if (!first_result_view || !first_result_view->selected())
     return;
   first_result_view->SetSelected(false, base::nullopt);
 }

 void AppListMainView::AssistantButtonPressed() {
   delegate_->StartAssistant();
 }

 void AppListMainView::BackButtonPressed() {
   if (!contents_view_->Back())
     app_list_view_->Dismiss();
 }

 }  // namespace ash
	// Copyright 2013 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 "ash/app_list/views/app_list_main_view.h"

	#include <algorithm>
	#include <memory>
	#include <utility>

	#include "ash/app_list/app_list_metrics.h"
	#include "ash/app_list/app_list_view_delegate.h"
	#include "ash/app_list/model/app_list_folder_item.h"
	#include "ash/app_list/model/app_list_item.h"
	#include "ash/app_list/model/app_list_model.h"
	#include "ash/app_list/views/app_list_folder_view.h"
	#include "ash/app_list/views/app_list_item_view.h"
	#include "ash/app_list/views/apps_container_view.h"
	#include "ash/app_list/views/apps_grid_view.h"
	#include "ash/app_list/views/contents_view.h"
	#include "ash/app_list/views/search_box_view.h"
	#include "ash/app_list/views/search_result_base_view.h"
	#include "ash/app_list/views/search_result_page_view.h"
	#include "ash/public/cpp/app_list/app_list_features.h"
	#include "ash/public/cpp/pagination/pagination_model.h"
	#include "ash/search_box/search_box_view_base.h"
	#include "base/bind.h"
	#include "base/callback.h"
	#include "base/files/file_path.h"
	#include "base/macros.h"
	#include "base/metrics/histogram_macros.h"
	#include "base/metrics/user_metrics.h"
	#include "base/strings/string_util.h"
	#include "ui/aura/window.h"
	#include "ui/gfx/geometry/insets.h"
	#include "ui/views/border.h"
	#include "ui/views/controls/button/button.h"
	#include "ui/views/controls/textfield/textfield.h"
	#include "ui/views/layout/fill_layout.h"
	#include "ui/views/widget/widget.h"
	#include "ui/wm/public/activation_client.h"

	namespace ash {

	////////////////////////////////////////////////////////////////////////////////
	// AppListMainView:

	AppListMainView::AppListMainView(AppListViewDelegate* delegate,
	AppListView* app_list_view)
	: delegate_(delegate),
	model_(delegate->GetModel()),
	search_model_(delegate->GetSearchModel()),
	app_list_view_(app_list_view) {
	// We need a layer to apply transform to in small display so that the apps
	// grid fits in the display.
	SetPaintToLayer();
	layer()->SetFillsBoundsOpaquely(false);

	model_->AddObserver(this);
	}

	AppListMainView::~AppListMainView() {
	model_->RemoveObserver(this);
	}

	void AppListMainView::Init(int initial_apps_page,
	SearchBoxView* search_box_view) {
	search_box_view_ = search_box_view;
	AddContentsViews();

	// Switch the apps grid view to the specified page.
	PaginationModel* pagination_model = GetAppsPaginationModel();
	if (pagination_model->is_valid_page(initial_apps_page))
	pagination_model->SelectPage(initial_apps_page, false);
	}

	void AppListMainView::AddContentsViews() {
	DCHECK(search_box_view_);
	auto contents_view = std::make_unique<ContentsView>(app_list_view_);
	contents_view->Init(model_);
	contents_view->SetPaintToLayer(ui::LAYER_NOT_DRAWN);
	contents_view->layer()->SetMasksToBounds(true);
	contents_view_ = AddChildView(std::move(contents_view));

	search_box_view_->set_contents_view(contents_view_);
	}

	void AppListMainView::ShowAppListWhenReady() {
	// After switching to tablet mode, other app windows may be active. Show the
	// app list without activating it to avoid breaking other windows' state.
	const aura::Window* active_window =
	wm::GetActivationClient(
	app_list_view_->GetWidget()->GetNativeView()->GetRootWindow())
	->GetActiveWindow();
	if (app_list_view_->is_tablet_mode() && active_window)
	GetWidget()->ShowInactive();
	else
	GetWidget()->Show();
	}

	void AppListMainView::ModelChanged() {
	model_->RemoveObserver(this);
	model_ = delegate_->GetModel();
	model_->AddObserver(this);
	search_model_ = delegate_->GetSearchModel();
	search_box_view_->ModelChanged();
	delete contents_view_;
	contents_view_ = nullptr;
	AddContentsViews();
	Layout();
	}

	void AppListMainView::SetDragAndDropHostOfCurrentAppList(
	ApplicationDragAndDropHost* drag_and_drop_host) {
	contents_view_->SetDragAndDropHostOfCurrentAppList(drag_and_drop_host);
	}

	PaginationModel* AppListMainView::GetAppsPaginationModel() {
	return contents_view_->apps_container_view()
	->apps_grid_view()
	->pagination_model();
	}

	void AppListMainView::NotifySearchBoxVisibilityChanged() {
	// Repaint the AppListView's background which will repaint the background for
	// the search box. This is needed because this view paints to a layer and
	// won't propagate paints upward.
	if (parent())
	parent()->SchedulePaint();
	}

	const char* AppListMainView::GetClassName() const {
	return "AppListMainView";
	}

	void AppListMainView::Layout() {
	gfx::Rect rect = GetContentsBounds();
	if (!rect.IsEmpty())
	contents_view_->SetBoundsRect(rect);
	}

	void AppListMainView::ActivateApp(AppListItem* item, int event_flags) {
	// TODO(jennyz): Activate the folder via AppListModel notification.
	if (item->GetItemType() == AppListFolderItem::kItemType) {
	contents_view_->ShowFolderContent(static_cast<AppListFolderItem*>(item));
	UMA_HISTOGRAM_ENUMERATION(kAppListFolderOpenedHistogram,
	kFullscreenAppListFolders, kMaxFolderOpened);
	} else {
	base::RecordAction(base::UserMetricsAction("AppList_ClickOnApp"));

	// Avoid using \|item->id()\| as the parameter. In some rare situations,
	// activating the item may destruct it. Using the reference to an object
	// which may be destroyed during the procedure as the function parameter
	// may bring the crash like https://crbug.com/990282.
	const std::string id = item->id();
	delegate_->ActivateItem(id, event_flags,
	AppListLaunchedFrom::kLaunchedFromGrid);
	}
	}

	void AppListMainView::CancelDragInActiveFolder() {
	contents_view_->apps_container_view()
	->app_list_folder_view()
	->items_grid_view()
	->EndDrag(true);
	}

	void AppListMainView::OnResultInstalled(SearchResult* result) {
	// Clears the search to show the apps grid. The last installed app
	// should be highlighted and made visible already.
	search_box_view_->ClearSearch();
	}

	// AppListModelObserver overrides:
	void AppListMainView::OnAppListStateChanged(AppListState new_state,
	AppListState old_state) {
	if (new_state == AppListState::kStateEmbeddedAssistant) {
	search_box_view_->SetVisible(false);
	} else {
	search_box_view_->SetVisible(true);
	}
	}

	void AppListMainView::QueryChanged(SearchBoxViewBase* sender) {
	std::u16string raw_query = search_model_->search_box()->text();
	std::u16string query;
	base::TrimWhitespace(raw_query, base::TRIM_ALL, &query);
	contents_view_->ShowSearchResults(search_box_view_->is_search_box_active() \|\|
	!query.empty());

	delegate_->StartSearch(raw_query);
	}

	void AppListMainView::ActiveChanged(SearchBoxViewBase* sender) {
	// Do not update views on closing.
	if (app_list_view_->app_list_state() == AppListViewState::kClosed)
	return;

	if (search_box_view_->is_search_box_active()) {
	// Show zero state suggestions when search box is activated with an empty
	// query.
	std::u16string raw_query = search_model_->search_box()->text();
	std::u16string query;
	base::TrimWhitespace(raw_query, base::TRIM_ALL, &query);
	if (query.empty())
	search_box_view_->ShowZeroStateSuggestions();
	} else {
	// Close the search results page if the search box is inactive.
	contents_view_->ShowSearchResults(false);
	}
	}

	void AppListMainView::SearchBoxFocusChanged(SearchBoxViewBase* sender) {
	// A fake focus (highlight) is always set on the first search result. When the
	// user moves focus from the search box textfield (e.g. to close button or
	// last search result), the fake focus should be removed.
	if (sender->search_box()->HasFocus())
	return;

	SearchResultBaseView* first_result_view =
	contents_view_->search_results_page_view()->first_result_view();
	if (!first_result_view \|\| !first_result_view->selected())
	return;
	first_result_view->SetSelected(false, base::nullopt);
	}

	void AppListMainView::AssistantButtonPressed() {
	delegate_->StartAssistant();
	}

	void AppListMainView::BackButtonPressed() {
	if (!contents_view_->Back())
	app_list_view_->Dismiss();
	}

	} // namespace ash