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Simple app to toggle window decorations.
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/* | |
* Copyright (C) 2017 Alberts Muktupāvels | |
* | |
* 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, 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 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/>. | |
* | |
* Compile with: | |
* gcc toggle-decorations.c -Wall -o toggle-decorations `pkg-config --cflags --libs x11` | |
* | |
* Usage: | |
* toggle-decorations 0x1234567 | |
* | |
* Support me: | |
* https://www.patreon.com/muktupavels | |
*/ | |
#include <limits.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <X11/Xlib.h> | |
typedef struct | |
{ | |
unsigned long flags; | |
unsigned long functions; | |
unsigned long decorations; | |
long input_mode; | |
unsigned long status; | |
} MotifWmHints; | |
static MotifWmHints * | |
get_motif_wm_hints (Display *display, | |
Window window) | |
{ | |
Atom property; | |
int result; | |
Atom actual_type; | |
int actual_format; | |
unsigned long nitems; | |
unsigned long bytes_after; | |
unsigned char *data; | |
property = XInternAtom (display, "_MOTIF_WM_HINTS", False); | |
result = XGetWindowProperty (display, window, property, | |
0, LONG_MAX, False, AnyPropertyType, | |
&actual_type, &actual_format, | |
&nitems, &bytes_after, &data); | |
if (result == Success && data != NULL) | |
{ | |
size_t data_size; | |
size_t max_size; | |
MotifWmHints *hints; | |
data_size = nitems * sizeof (long); | |
max_size = sizeof (*hints); | |
hints = calloc (1, max_size); | |
memcpy (hints, data, data_size > max_size ? max_size : data_size); | |
XFree (data); | |
return hints; | |
} | |
return NULL; | |
} | |
static void | |
toggle_window_decorations (Display *display, | |
Window window) | |
{ | |
MotifWmHints *hints; | |
Atom property; | |
int nelements; | |
hints = get_motif_wm_hints (display, window); | |
if (hints == NULL) | |
{ | |
hints = calloc (1, sizeof (*hints)); | |
hints->decorations = (1L << 0); | |
} | |
hints->flags |= (1L << 1); | |
hints->decorations = hints->decorations == 0 ? (1L << 0) : 0; | |
property = XInternAtom (display, "_MOTIF_WM_HINTS", False); | |
nelements = sizeof (*hints) / sizeof (long); | |
XChangeProperty (display, window, property, property, 32, PropModeReplace, | |
(unsigned char *) hints, nelements); | |
free (hints); | |
} | |
int | |
main (int argc, | |
char *argv[]) | |
{ | |
Display *display; | |
Window window; | |
display = XOpenDisplay (NULL); | |
if (display == NULL) | |
return 1; | |
window = 0; | |
if (argc > 1) | |
{ | |
sscanf (argv[1], "0x%lx", &window); | |
if (window == 0) | |
sscanf (argv[1], "%lu", &window); | |
} | |
if (window == 0) | |
return 1; | |
toggle_window_decorations (display, window); | |
XCloseDisplay (display); | |
return 0; | |
} |
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It's very useful, thanks.
argc
is (almost) always grater than zero ([0]
is the program name).I suggest to change L119 to (it fixes crash):