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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_VIEWS_COMMANDER_FRONTEND_VIEWS_H_
#define CHROME_BROWSER_UI_VIEWS_COMMANDER_FRONTEND_VIEWS_H_
#include <memory>
#include "base/callback_list.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/ui/browser_list_observer.h"
#include "chrome/browser/ui/commander/commander_frontend.h"
#include "chrome/browser/ui/webui/commander/commander_handler.h"
#include "ui/views/widget/widget_observer.h"
class CommanderFocusLossWatcher;
class CommanderWebView;
class Profile;
namespace views {
class WidgetDelegate;
class Widget;
} // namespace views
namespace commander {
class CommanderBackend;
struct CommanderViewModel;
} // namespace commander
// Views implementation of commander::CommanderFrontend. The actual UI is WebUI;
// this class is responsible for setting up the infrastructure to host the
// WebUI in its own widget and mediating between the WebUI implementation and
// the controller.
class CommanderFrontendViews : public commander::CommanderFrontend,
public CommanderHandler::Delegate,
public BrowserListObserver,
public views::WidgetObserver {
public:
explicit CommanderFrontendViews(commander::CommanderBackend* backend);
~CommanderFrontendViews() override;
// commander::CommanderFrontend overrides
void ToggleForBrowser(Browser* browser) override;
void Show(Browser* browser) override;
void Hide() override;
// CommanderHandler::Delegate overrides
void OnTextChanged(const std::u16string& text) override;
void OnOptionSelected(size_t option_index, int result_set_id) override;
void OnCompositeCommandCancelled() override;
void OnDismiss() override;
void OnHeightChanged(int new_height) override;
void OnHandlerEnabled(bool is_enabled) override;
// BrowserListObserver overrides
void OnBrowserClosing(Browser* browser) override;
// views::WidgetObserver overrides
void OnWidgetBoundsChanged(views::Widget* widget,
const gfx::Rect& new_bounds) override;
private:
// Receives view model updates from |backend_|.
void OnViewModelUpdated(commander::CommanderViewModel view_model);
// Creates a WebView to host the WebUI interface for |profile|.
std::unique_ptr<CommanderWebView> CreateWebView(Profile* profile);
bool is_showing() { return widget_ != nullptr; }
void OnAppTerminating();
// The controller. Must outlive this object.
raw_ptr<commander::CommanderBackend> backend_;
// The widget that contains |web_view_|
raw_ptr<views::Widget> widget_ = nullptr;
// |widget_|'s delegate
std::unique_ptr<views::WidgetDelegate> widget_delegate_;
// The WebView that hosts the WebUI instance. Populated when the view
// is showing and null otherwise.
raw_ptr<CommanderWebView> web_view_ = nullptr;
// The browser |widget_| is attached to.
raw_ptr<Browser> browser_ = nullptr;
// Whether the web UI interface is loaded and ready to accept view models.
bool is_handler_enabled_ = false;
// Sbuscription for observing app termination.
base::CallbackListSubscription subscription_;
// Helper to close the commander widget on deactivation.
std::unique_ptr<CommanderFocusLossWatcher> focus_loss_watcher_;
base::WeakPtrFactory<CommanderFrontendViews> weak_ptr_factory_{this};
};
#endif // CHROME_BROWSER_UI_VIEWS_COMMANDER_FRONTEND_VIEWS_H_
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