plugin_event.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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/>.
 *
 */

#ifndef WINTERMUTE_PLUGIN_EVENT_H
#define WINTERMUTE_PLUGIN_EVENT_H

namespace Wintermute {

// WME events
typedef enum {
    WME_EVENT_UPDATE = 0,
    WME_EVENT_SCENE_DRAW_BEGIN,
    WME_EVENT_SCENE_DRAW_END,
    WME_EVENT_SCENE_INIT,
    WME_EVENT_SCENE_SHUTDOWN,
    WME_EVENT_GAME_BEFORE_SAVE,
    WME_EVENT_GAME_AFTER_LOAD,
    WME_EVENT_MAX
} EWmeEvent;

typedef void (*PluginApplyEvent)(void *, void *);

typedef struct _PluginEventEntry {
    EWmeEvent        _type;
    PluginApplyEvent _callback;
    void             *_plugin;
} PluginEventEntry;

class PluginEvent {
public:
    PluginEvent() {};
    ~PluginEvent() {};

    void subscribeEvent(PluginEventEntry &event) {
        for (auto it = _entries.begin(); it != _entries.end(); ++it) {
            if (event._type == (*it)._type && event._callback == (*it)._callback) {
                break;
            }
        }
        _entries.push_back(event);
    }

    void unsubscribeEvent(PluginEventEntry &event) {
        for (auto it = _entries.begin(); it != _entries.end(); ++it) {
            if (event._type == (*it)._type && event._callback == (*it)._callback) {
                _entries.erase(it);
                break;
            }
        }
    }

    void applyEvent(EWmeEvent type, void *eventData) {
        for (auto it = _entries.begin(); it != _entries.end(); ++it) {
            if (type == (*it)._type && (*it)._callback != nullptr) {
                (*it)._callback(eventData, (*it)._plugin);
            }
        }
    }

    void clearEvents() {
        _entries.clear();
    }

private:
    Common::List<PluginEventEntry> _entries;
};

} // End of namespace Wintermute

#endif