dattr.c

/* See LICENSE file for copyright and license details. */

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "randr.h"
#include "util.h"

xcb_connection_t *conn;
xcb_screen_t     *scrn;

void
usage(char *name)
{
	printf("usage: %s [whxy] <display_id> \n", name);
	exit(0);
}

int
main(int argc, char *argv[])
{
#ifdef __OpenBSD__
	if (pledge("stdio rpath unix", NULL) == -1)
		err(1, "pledge");
#endif
	xcb_randr_output_t output = -1;
	xcb_randr_get_output_info_reply_t *output_info = NULL;
	xcb_randr_crtc_t screen_crtc;
	xcb_randr_get_crtc_info_reply_t *screen_crtc_info = NULL;
	char *output_name;

	if (argc == 2)
		output_name = argv[1];
	else if (argc == 3)
		output_name = argv[2];
	else
		usage(argv[0]);

	init_xcb(&conn);
	get_screen(conn, &scrn);

	xcb_randr_provider_t *providers;
	int p_len = get_providers(conn, scrn, &providers);

	/* get the id of the output */
	int i = 0;
	while (i < p_len && output == -1) {
		xcb_randr_output_t *os;
		int o_len = get_outputs(conn, providers[i], &os);

		int j = 0;
		while (j < o_len && output == -1) {
			if (strcmp(output_name,
						(const char *)get_output_name(conn, os[j])) == 0)
				output = os[j];

			j++;
		}

		i++;
	}

	if (output == -1) {
		errx(1, "Output not found");
	}
	output_info = get_output_info(conn, output);

	/* get info about output */
	screen_crtc = output_info->crtc;
	screen_crtc_info = get_output_crtc_info(conn, screen_crtc);
	if (screen_crtc_info == '\0')
		errx(1, "Output not in use");

	if (argc == 3) {
		/* print info */
		for (i = 0; i < strlen(argv[1]); i++) {
			switch (argv[1][i]) {
			case 'w':
				printf("%d\n", screen_crtc_info->width);
				break;
			case 'h':
				printf("%d\n", screen_crtc_info->height);
				break;
			case 'x':
				printf("%d\n", screen_crtc_info->x);
				break;
			case 'y':
				printf("%d\n", screen_crtc_info->y);
				break;
			default:
				usage(argv[0]);
			}
		}
	}

	free(output_info);
	free(screen_crtc_info);
	kill_xcb(&conn);
	return 0;
}