/**

 * ShaderShark

 * Copyright © 2023 František Kučera (Frantovo.cz, GlobalCode.info)

 *

 * 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, version 3 of the License.

 *

 * 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/>.

 */

#pragma once

#include <cstring>

#include <X11/Xatom.h>

#include <X11/XKBlib.h>

#include <X11/keysymdef.h>

/**

 * Publish our PID (process ID) through the X11 window property.

 */

inline

void setX11PID(Display* dpy, Window win) {

	Atom _NET_WM_PID = XInternAtom(dpy, "_NET_WM_PID", False);

	pid_t pid = getpid();

	XChangeProperty(dpy, win, _NET_WM_PID, XA_CARDINAL,

			32, PropModeReplace, (unsigned char *) &pid, 1);

}

inline

bool setFullscreen(Display* dpy, Window win, bool fullscreen) {

	XEvent ev;

	Atom wmState = XInternAtom(dpy, "_NET_WM_STATE", False);

	Atom wmFullscreen = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);

	ev.xclient.type = ClientMessage;

	ev.xclient.serial = 0; // TODO: serial?

	ev.xclient.send_event = True;

	ev.xclient.display = dpy;

	ev.xclient.window = win;

	ev.xclient.message_type = wmState;

	ev.xclient.format = 32;

	ev.xclient.data.l[0] = fullscreen;

	ev.xclient.data.l[1] = wmFullscreen;

	ev.xclient.data.l[2] = None;

	XSendEvent(dpy, DefaultRootWindow(dpy), False, SubstructureNotifyMask, &ev);

	return fullscreen;

}

class DecodedKey {

public:

	unsigned int code;

	KeySym symbol;

	const char* name;

	bool matches(

			KeySym s1,

			KeySym s2 = XK_VoidSymbol,

			KeySym s3 = XK_VoidSymbol,

			KeySym s4 = XK_VoidSymbol,

			KeySym s5 = XK_VoidSymbol,

			KeySym s6 = XK_VoidSymbol,

			KeySym s7 = XK_VoidSymbol,

			KeySym s8 = XK_VoidSymbol

			) {

		return symbol == s1

				|| symbol == s2

				|| symbol == s3

				|| symbol == s4

				|| symbol == s5

				|| symbol == s6

				|| symbol == s7

				|| symbol == s8;

	}

};

inline

const DecodedKey decodeKeycode(Display * dpy, KeyCode keyCode) {

	DecodedKey dk = {};

	dk.code = keyCode;

	dk.symbol = XkbKeycodeToKeysym(dpy, keyCode, 0, 0);

	dk.name = XKeysymToString(dk.symbol);

	return dk;

}