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/*
* Copyright © 2014 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authored by: Alexandros Frantzis <alexandros.frantzis@canonical.com>
*/
#ifndef USC_SESSION_SWITCHER_H_
#define USC_SESSION_SWITCHER_H_
#include "dm_connection.h"
#include "session_monitor.h"
#include <map>
#include <mutex>
namespace usc
{
class Spinner;
class SessionSwitcher : public DMMessageHandler, public SessionMonitor
{
public:
explicit SessionSwitcher(std::shared_ptr<Spinner> const& spinner);
/* From SessionMonitor */
void add(std::shared_ptr<Session> const& session, pid_t pid) override;
void remove(std::shared_ptr<mir::frontend::Session> const& session) override;
void mark_ready(mir::frontend::Session const* session) override;
/* From DMMessageHandler */
void set_active_session(std::string const& name) override;
void set_next_session(std::string const& name) override;
private:
enum class ShowMode { as_active, as_next };
void update_displayed_sessions();
void hide_uninteresting_sessions();
bool is_session_ready_for_display(std::string const& name);
bool is_session_expected_to_become_ready(std::string const& name);
void show_session(std::string const& name, ShowMode show_mode);
void hide_session(std::string const& name);
void ensure_spinner_will_be_shown(ShowMode show_mode);
void ensure_spinner_is_not_running();
struct SessionInfo
{
SessionInfo() = default;
explicit SessionInfo(std::shared_ptr<Session> session)
: session{session}
{
}
std::shared_ptr<Session> session;
bool ready = false;
};
std::mutex mutex;
std::shared_ptr<Spinner> const spinner_process;
std::map<std::string, SessionInfo> sessions;
std::string active_name;
std::string next_name;
std::string spinner_name;
bool booting;
};
}
#endif
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