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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.
#ifndef CHROME_BROWSER_UI_WEBUI_SIGNIN_LOGIN_UI_SERVICE_H_
#define CHROME_BROWSER_UI_WEBUI_SIGNIN_LOGIN_UI_SERVICE_H_
#include "base/basictypes.h"
#include "base/observer_list.h"
#include "components/browser_context_keyed_service/browser_context_keyed_service.h"
class Browser;
class Profile;
// The LoginUIService helps track per-profile information for the login UI -
// for example, whether there is login UI currently on-screen.
class LoginUIService : public ProfileKeyedService {
public:
// Various UI components implement this API to allow LoginUIService to
// manipulate their associated login UI.
class LoginUI {
public:
// Invoked when the login UI should be brought to the foreground.
virtual void FocusUI() = 0;
// Invoked when the login UI should be closed. This can be invoked if the
// user takes an action that should display new login UI.
virtual void CloseUI() = 0;
protected:
virtual ~LoginUI() {}
};
// Interface for obervers of LoginUIService.
class Observer {
public:
// Called when a new login UI is shown.
// |ui| The login UI that was just shown. Will never be null.
virtual void OnLoginUIShown(LoginUI* ui) = 0;
// Called when a login UI is closed.
// |ui| The login UI that was just closed; will never be null.
virtual void OnLoginUIClosed(LoginUI* ui) = 0;
protected:
virtual ~Observer() {}
};
explicit LoginUIService(Profile* profile);
virtual ~LoginUIService();
// Gets the currently active login UI, or null if no login UI is active.
LoginUI* current_login_ui() const {
return ui_;
}
// |observer| The observer to add or remove; cannot be NULL.
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// Sets the currently active login UI. It is illegal to call this if there is
// already login UI visible.
void SetLoginUI(LoginUI* ui);
// Called when login UI is closed. If the passed UI is the current login UI,
// sets current_login_ui() to null.
void LoginUIClosed(LoginUI* ui);
// Delegate to an existing login dialog if one exists.
// If not, we make a new popup dialog window, and set it to
// chrome://signin to ask the user to sign in to chrome.
void ShowLoginPopup();
private:
// Weak pointer to the currently active login UI, or null if none.
LoginUI* ui_;
Profile* profile_;
// List of observers.
ObserverList<Observer> observer_list_;
DISALLOW_COPY_AND_ASSIGN(LoginUIService);
};
#endif // CHROME_BROWSER_UI_WEBUI_SIGNIN_LOGIN_UI_SERVICE_H_
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