/* -*-c-*-
*
- * $Id: xscsize.c,v 1.3 1998/12/11 09:50:05 mdw Exp $
- *
* Return X display size to shell script
*
* (c) 1998 Straylight/Edgeware
*/
-/*----- Licensing notice --------------------------------------------------*
+/*----- Licensing notice --------------------------------------------------*
*
* This file is part of the Edgeware X tools collection.
*
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
- *
+ *
* X tools 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 X tools; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: xscsize.c,v $
- * Revision 1.3 1998/12/11 09:50:05 mdw
- * Minor modifications to work with mLib and mgLib.
- *
- * Revision 1.2 1998/11/21 22:30:22 mdw
- * Support GNU-style long options throughout, and introduce proper help
- * text to all programs. Update manual pages to match.
- *
- * Revision 1.1 1998/11/16 23:00:49 mdw
- * Initial versions.
- *
- */
-
/*----- Header files ------------------------------------------------------*/
#include <stdio.h>
#include <string.h>
#include <X11/Xlib.h>
+#ifdef HAVE_XRANDR
+# include <X11/extensions/Xrandr.h>
+#endif
+#include <mLib/alloc.h>
+#include <mLib/dstr.h>
#include <mLib/mdwopt.h>
#include <mLib/quis.h>
+/*----- Data structures ---------------------------------------------------*/
+
+struct screen {
+ int x, y;
+ unsigned wd, ht;
+};
+
+/*----- Static variables --------------------------------------------------*/
+
+static unsigned int flags = 0;
+#define F_SH 1u
+#define F_CSH 2u
+#define F_SHELL 3u
+#define F_EXPORT 4u
+
/*----- Main code ---------------------------------------------------------*/
static void version(FILE *fp)
+ { pquis(fp, "$ (xtoys version " VERSION ")\n"); }
+
+static void usage(FILE *fp)
+ { pquis(fp, "Usage: $ [-bcx] [-d DISPLAY]\n"); }
+
+static void help(FILE *fp)
{
- fprintf(fp, "%s (xtoys version " VERSION ")\n", QUIS);
+ version(fp);
+ fputc('\n', fp);
+ usage(stdout);
+ fputs("\n\
+Reads the size of the X root window and outputs it in a form suitable\n\
+for use as a shell assignment statement, defining variables XWIDTH and\n\
+XHEIGHT.\n\
+\n\
+Options:\n\
+\n\
+-h, --help Display this help text\n\
+-u, --usage Display a short usage summary\n\
+-v, --version Display the program's version number\n\
+\n\
+-d, --display=DISPLAY Choose X display to connect to\n\
+-b, --bourne-shell Output text suitable for a Bourne shell\n\
+-c, --c-shell Output text suitable for a C shell\n\
+-x, --export Export the variables into the environment\n",
+ fp);
}
-static void usage(FILE *fp)
+static void print_var(const char *name, int index, unsigned long value)
+{
+ dstr d = DSTR_INIT;
+
+ if (index >= 0) {
+ dstr_putf(&d, "XSCR%d_%s", index, name);
+ name = d.buf;
+ }
+ if (flags & F_SH) {
+ printf("%s=%lu", name, value);
+ if (flags & F_EXPORT) printf("; export %s", name);
+ } else if (flags & F_CSH) {
+ if (flags & F_EXPORT) printf("setenv %s %lu", name, value);
+ else printf("set %s=%lu", name, value);
+ }
+ putchar('\n');
+ dstr_destroy(&d);
+}
+
+static int compare_screen(const void *a, const void *b)
{
- fprintf(fp, "Usage: %s [-bcx] [-d display]\n", QUIS);
+ const struct screen *s = a, *t = b;
+ if (s->y != t->y) return (s->y < t->y ? -1 : +1);
+ else if (s->x != t->x) return (s->x < t->x ? -1 : +1);
+ else return (0);
}
int main(int argc, char *argv[])
{
+ Display *dpy;
+ const char *s;
const char *display = 0;
unsigned f = 0;
unsigned long wd, ht;
+ int sc;
+#ifdef HAVE_XRANDR
+ Window root;
+ int rrev, rrerr, rrmaj, rrmin;
+ XRRScreenResources *res;
+ XRRCrtcInfo *crtc;
+ struct screen *scr;
+ size_t nscr, j;
+ int i;
+#endif
- enum {
- f_sh = 1,
- f_csh = 2,
- f_shell = 3,
- f_export = 4
- };
+#define f_bogus 1u
+#define f_multi 2u
/* --- Parse command line options --- */
for (;;) {
static struct option opt[] = {
- { "help", 0, 0, 'h' },
- { "usage", 0, 0, 'u' },
- { "version", 0, 0, 'v' },
- { "display", required_argument, 0, 'd' },
- { "bourne-shell", 0, 0, 'b' },
- { "c-shell", 0, 0, 'c' },
- { "export", 0, 0, 'x' },
- { 0, 0, 0, 0 }
+ { "help", 0, 0, 'h' },
+ { "usage", 0, 0, 'u' },
+ { "version", 0, 0, 'v' },
+ { "display", OPTF_ARGREQ, 0, 'd' },
+ { "bourne-shell", 0, 0, 'b' },
+ { "c-shell", 0, 0, 'c' },
+ { "multiscreen", 0, 0, 'm' },
+ { "export", 0, 0, 'x' },
+ { 0, 0, 0, 0 }
};
- int i = getopt_long(argc, argv, "huv d:bcx", opt, 0);
- if (i < 0)
- break;
+ int i = getopt_long(argc, argv, "huv" "d:bcmx", opt, 0);
+ if (i < 0) break;
switch (i) {
- case 'h':
- version(stdout);
- fputs("\n", stdout);
- usage(stdout);
- fputs(
-"\n"
-"Reads the size of the X root window and outputs it in a form suitable\n"
-"for use as a shell assignment statement, defining variables XWIDTH and\n"
-"XHEIGHT.\n"
-"\n"
-"Options:\n"
-"\n"
-"-h, --help Display this help text\n"
-"-u, --usage Display a short usage summary\n"
-"-v, --version Display the program's version number\n"
-"\n"
-"-d, --display=DISPLAY Choose X display to connect to\n"
-"-b, --bourne-shell Output text suitable for a Bourne shell\n"
-"-c, --c-shell Output text suitable for a C shell\n"
-"-x, --export Export the variables into the environment\n",
- stdout);
- exit(0);
- break;
- case 'u':
- usage(stdout);
- exit(0);
- break;
- case 'v':
- version(stdout);
- exit(0);
- break;
-
- case 'd':
- display = optarg;
- break;
- case 'b':
- f |= f_sh;
- break;
- case 'c':
- f |= f_csh;
- break;
- case 'x':
- f |= f_export;
- break;
- default:
- usage(stderr);
- exit(EXIT_FAILURE);
- break;
+ case 'h': help(stdout); exit(0); break;
+ case 'u': usage(stdout); exit(0); break;
+ case 'v': version(stdout); exit(0); break;
+ case 'd': display = optarg; break;
+ case 'b': flags |= F_SH; break;
+ case 'c': flags |= F_CSH; break;
+ case 'm': f |= f_multi; break;
+ case 'x': flags |= F_EXPORT; break;
+ default: f |= f_bogus; break;
}
}
+ if (optind < argc) f |= f_bogus;
+ if (f & f_bogus) { usage(stderr); exit(EXIT_FAILURE); }
+
/* --- Sort out the shell type --- *
*
* If the shell name contains the string `csh' then assume it's a C shell.
* Otherwise assume it's Bourne. This seems to work in practice.
*/
- if (!(f & f_shell)) {
- const char *s = getenv("SHELL");
- if (!s)
- f |= f_sh;
- if (strstr(s, "csh"))
- f |= f_csh;
- else
- f |= f_sh;
+ if (!(flags & F_SHELL)) {
+ s = getenv("SHELL");
+ if (!s) flags |= F_SH;
+ if (strstr(s, "csh")) flags |= F_CSH;
+ else flags |= F_SH;
}
- if ((f & f_sh) && (f & f_csh)) {
+ if ((flags & F_SH) && (flags & F_CSH)) {
fprintf(stderr, "xscsize: make your mind up about your shell type\n");
exit(EXIT_FAILURE);
}
- /* --- Get the important information --- */
+ /* --- Open the display --- */
- {
- Display *dpy = XOpenDisplay(display);
- int sc;
- if (!dpy) {
- fprintf(stderr, "xscsize: couldn't open display\n");
- exit(EXIT_FAILURE);
- }
- sc = DefaultScreen(dpy);
- wd = DisplayWidth(dpy, sc);
- ht = DisplayHeight(dpy, sc);
- XCloseDisplay(dpy);
+ dpy = XOpenDisplay(display);
+ if (!dpy) {
+ fprintf(stderr, "xscsize: couldn't open display\n");
+ exit(EXIT_FAILURE);
}
- /* --- Do the output thing --- */
+ /* --- Fetch the root window size --- *
+ *
+ * We might need this whatever happens, so go with the flow.
+ */
- if (f & f_sh) {
- printf("XWIDTH=%lu XHEIGHT=%lu", wd, ht);
- if (f & f_export)
- printf("; export XWIDTH XHEIGHT");
- }
- if (f & f_csh) {
- if (f & f_export)
- printf("setenv XWIDTH %lu; setenv XHEIGHT %lu", wd, ht);
- else
- printf("set XWIDTH=%lu XHEIGHT=%lu", wd, ht);
+ sc = DefaultScreen(dpy);
+ wd = DisplayWidth(dpy, sc);
+ ht = DisplayHeight(dpy, sc);
+
+ /* --- Calculate and produce the necessary output --- *
+ *
+ * If we're meant to report on individual screens then try to collect
+ * information about them using the RANDR extension. If that doesn't
+ * exist, or the version is too ancient, or its otherwise not going to
+ * work, then pretend there's just one screen that's the size of the root
+ * window.
+ */
+
+ if (f & f_multi) {
+#ifdef HAVE_XRANDR
+ if (XRRQueryExtension(dpy, &rrev, &rrerr) &&
+ XRRQueryVersion(dpy, &rrmaj, &rrmin) &&
+ (rrmaj > 1 || (rrmaj == 1 && rrmin >= 2))) {
+ root = RootWindow(dpy, sc);
+ res = XRRGetScreenResources(dpy, root);
+ scr = xmalloc(res->ncrtc*sizeof(*scr)); j = 0;
+ for (i = 0; i < res->ncrtc; i++) {
+ crtc = XRRGetCrtcInfo(dpy, res, res->crtcs[i]);
+ if (crtc->mode) {
+ scr[j].x = crtc->x; scr[j].wd = crtc->width;
+ scr[j].y = crtc->y; scr[j].ht = crtc->height;
+ j++;
+ }
+ XRRFreeCrtcInfo(crtc);
+ }
+ nscr = j;
+ XRRFreeScreenResources(res);
+ } else
+#endif
+ {
+ /* --- The RANDR extension isn't available --- */
+
+ nscr = 1;
+ scr = xmalloc(sizeof(*scr));
+ scr->x = 0; scr->wd = wd;
+ scr->y = 0; scr->ht = ht;
+ }
+
+ /* --- Sort and report the screens --- *
+ *
+ * The chances are good that the screens reported by RANDR aren't in any
+ * especially useful order. Sort them into (my) reading order.
+ */
+
+ qsort(scr, nscr, sizeof(*scr), compare_screen);
+ print_var("XNSCR", -1, nscr);
+ for (j = 0; j < nscr; j++) {
+ print_var("X", j, scr[j].x);
+ print_var("Y", j, scr[j].y);
+ print_var("WIDTH", j, scr[j].wd);
+ print_var("HEIGHT", j, scr[j].ht);
+ }
+ } else {
+ print_var("XWIDTH", -1, wd);
+ print_var("XHEIGHT", -1, ht);
}
- putchar('\n');
+
+ /* --- We're done with the display now --- */
+
+ XCloseDisplay(dpy);
/* --- Done --- */
~mdw / xtoys / blobdiff