// Copyright (C) 2022 RozK
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#include "../events.hpp"
#include <X11/Xlib.h>

unsigned rk_events_mask = KeyPressMask | KeyReleaseMask;
extern Display * rk_display;
extern Window rk_window;

rk_uint rk_consume_events(
    rk_event * events,
    rk_uint max_events) {
    if (!events || !max_events) {
        return 0;
    }
    XEvent x11_event;
    unsigned nevents = 0;
    for ( ; nevents < max_events ; ++nevents) {
        if (XCheckWindowEvent(rk_display, rk_window, rk_events_mask, &x11_event)) {
            rk_event & event = events[nevents];
            switch (x11_event.type) {
                case KeyPress:
                    event.type = RK_EVENT_KEY_PRESS;
                    event.key.keycode = x11_event.xkey.keycode;
                    break;
                case KeyRelease:
                    event.type = RK_EVENT_KEY_RELEASE;
                    event.key.keycode = x11_event.xkey.keycode;
                    break;
            }
        } else {
            break;
        }
    }
    return nevents;
}

void rk_flush_events() {
    XEvent x11_event;
    while (XCheckWindowEvent(rk_display, rk_window, rk_events_mask, &x11_event)) {
    }
}