3a9b9fe4604ad33de8cd34951de9022872d6f953
3 * Return X display size to shell script
5 * (c) 1998 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of the Edgeware X tools collection.
12 * X tools is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * X tools is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with X tools; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 /*----- Header files ------------------------------------------------------*/
35 # include <X11/extensions/Xrandr.h>
38 #include <mLib/alloc.h>
39 #include <mLib/dstr.h>
40 #include <mLib/mdwopt.h>
41 #include <mLib/quis.h>
43 /*----- Data structures ---------------------------------------------------*/
50 /*----- Static variables --------------------------------------------------*/
52 static unsigned int flags
= 0;
58 /*----- Main code ---------------------------------------------------------*/
60 static void version(FILE *fp
)
61 { pquis(fp
, "$ (xtoys version " VERSION
")\n"); }
63 static void usage(FILE *fp
)
64 { pquis(fp
, "Usage: $ [-bcmx] [-d DISPLAY]\n"); }
66 static void help(FILE *fp
)
72 Reads the size of the X root window and outputs it in a form suitable\n\
73 for use as a shell assignment statement, defining variables XWIDTH and\n\
78 -h, --help Display this help text\n\
79 -u, --usage Display a short usage summary\n\
80 -v, --version Display the program's version number\n\
82 -d, --display=DISPLAY Choose X display to connect to\n\
83 -b, --bourne-shell Output text suitable for a Bourne shell\n\
84 -c, --c-shell Output text suitable for a C shell\n\
85 -m, --multiscreen Describe each screen individually\n\
86 -x, --export Export the variables into the environment\n",
90 static void print_var(const char *name
, int index
, unsigned long value
)
95 dstr_putf(&d
, "XSCR%d_%s", index
, name
);
99 printf("%s=%lu", name
, value
);
100 if (flags
& F_EXPORT
) printf("; export %s", name
);
101 } else if (flags
& F_CSH
) {
102 if (flags
& F_EXPORT
) printf("setenv %s %lu", name
, value
);
103 else printf("set %s=%lu", name
, value
);
109 static int compare_screen(const void *a
, const void *b
)
111 const struct screen
*s
= a
, *t
= b
;
112 if (s
->y
!= t
->y
) return (s
->y
< t
->y ?
-1 : +1);
113 else if (s
->x
!= t
->x
) return (s
->x
< t
->x ?
-1 : +1);
117 int main(int argc
, char *argv
[])
121 const char *display
= 0;
123 unsigned long wd
, ht
;
129 int rrev
, rrerr
, rrmaj
, rrmin
;
130 XRRScreenResources
*res
;
138 /* --- Parse command line options --- */
143 static struct option opt
[] = {
144 { "help", 0, 0, 'h' },
145 { "usage", 0, 0, 'u' },
146 { "version", 0, 0, 'v' },
147 { "display", OPTF_ARGREQ
, 0, 'd' },
148 { "bourne-shell", 0, 0, 'b' },
149 { "c-shell", 0, 0, 'c' },
150 { "multiscreen", 0, 0, 'm' },
151 { "export", 0, 0, 'x' },
155 int i
= getopt_long(argc
, argv
, "huv" "d:bcmx", opt
, 0);
158 case 'h': help(stdout
); exit(0); break;
159 case 'u': usage(stdout
); exit(0); break;
160 case 'v': version(stdout
); exit(0); break;
161 case 'd': display
= optarg
; break;
162 case 'b': flags
|= F_SH
; break;
163 case 'c': flags
|= F_CSH
; break;
164 case 'm': f
|= f_multi
; break;
165 case 'x': flags
|= F_EXPORT
; break;
166 default: f
|= f_bogus
; break;
170 if (optind
< argc
) f
|= f_bogus
;
171 if (f
& f_bogus
) { usage(stderr
); exit(EXIT_FAILURE
); }
173 /* --- Sort out the shell type --- *
175 * If the shell name contains the string `csh' then assume it's a C shell.
176 * Otherwise assume it's Bourne. This seems to work in practice.
179 if (!(flags
& F_SHELL
)) {
181 if (!s
) flags
|= F_SH
;
182 if (strstr(s
, "csh")) flags
|= F_CSH
;
186 if ((flags
& F_SH
) && (flags
& F_CSH
)) {
187 fprintf(stderr
, "xscsize: make your mind up about your shell type\n");
191 /* --- Open the display --- */
193 dpy
= XOpenDisplay(display
);
195 fprintf(stderr
, "xscsize: couldn't open display\n");
199 /* --- Fetch the root window size --- *
201 * We might need this whatever happens, so go with the flow.
204 sc
= DefaultScreen(dpy
);
205 wd
= DisplayWidth(dpy
, sc
);
206 ht
= DisplayHeight(dpy
, sc
);
208 /* --- Calculate and produce the necessary output --- *
210 * If we're meant to report on individual screens then try to collect
211 * information about them using the RANDR extension. If that doesn't
212 * exist, or the version is too ancient, or its otherwise not going to
213 * work, then pretend there's just one screen that's the size of the root
219 if (XRRQueryExtension(dpy
, &rrev
, &rrerr
) &&
220 XRRQueryVersion(dpy
, &rrmaj
, &rrmin
) &&
221 (rrmaj
> 1 || (rrmaj
== 1 && rrmin
>= 2))) {
222 root
= RootWindow(dpy
, sc
);
223 res
= XRRGetScreenResources(dpy
, root
);
224 scr
= xmalloc(res
->ncrtc
*sizeof(*scr
)); j
= 0;
225 for (i
= 0; i
< res
->ncrtc
; i
++) {
226 crtc
= XRRGetCrtcInfo(dpy
, res
, res
->crtcs
[i
]);
228 scr
[j
].x
= crtc
->x
; scr
[j
].wd
= crtc
->width
;
229 scr
[j
].y
= crtc
->y
; scr
[j
].ht
= crtc
->height
;
232 XRRFreeCrtcInfo(crtc
);
235 XRRFreeScreenResources(res
);
239 /* --- The RANDR extension isn't available --- */
242 scr
= xmalloc(sizeof(*scr
));
243 scr
->x
= 0; scr
->wd
= wd
;
244 scr
->y
= 0; scr
->ht
= ht
;
247 /* --- Sort and report the screens --- *
249 * The chances are good that the screens reported by RANDR aren't in any
250 * especially useful order. Sort them into (my) reading order.
253 qsort(scr
, nscr
, sizeof(*scr
), compare_screen
);
254 print_var("XNSCR", -1, nscr
);
255 for (j
= 0; j
< nscr
; j
++) {
256 print_var("X", j
, scr
[j
].x
);
257 print_var("Y", j
, scr
[j
].y
);
258 print_var("WIDTH", j
, scr
[j
].wd
);
259 print_var("HEIGHT", j
, scr
[j
].ht
);
262 print_var("XWIDTH", -1, wd
);
263 print_var("XHEIGHT", -1, ht
);
266 /* --- We're done with the display now --- */
275 /*----- That's all, folks -------------------------------------------------*/