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#include <stdio.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
/* Compile with "gcc -o skip_taskbar -Wall skip_taskbar.c -lX11" */
/* Run as ./skip_taskbar [0|1] to select initial state */
/* Click middle mouse button on window to toggle */
/* Set window state hint to skip taskbar or not */
static void SetSkipTaskbarHint(Display* display, Window win, Bool toggle)
{
fprintf(stderr, "Setting hint to %s on taskbar 0x%x\n", (toggle ? "hide" : "show"), (unsigned int)win);
Atom skip_taskbar = XInternAtom(display, "_NET_WM_STATE_SKIP_TASKBAR",False);
Atom net_wm_state = XInternAtom(display, "_NET_WM_STATE",False);
if (toggle)
{
XChangeProperty(display, win, net_wm_state, XA_ATOM, 32, PropModeReplace, (unsigned char *)&skip_taskbar, 1);
}
else
{
XDeleteProperty(display, win, net_wm_state);
}
}
int main(int argc, char** argv)
{
if (argc != 2 || strcmp(argv[1], "-h") == 0)
{
fprintf(stderr, "Usage: %s [show_on_taskbar]\n", argv[0]);
return 1;
}
Display* display = XOpenDisplay(NULL);
if (!display) {
fprintf(stderr, "Couldn't open display\n");
return 1;
}
int screen = DefaultScreen(display);
const int width = 300, height = 200;
unsigned long black = BlackPixel(display, screen);
unsigned long white = WhitePixel(display, screen);
Window win = XCreateSimpleWindow(display,
RootWindow(display, screen),
0, /* x */
0, /* y */
width,
height,
0, /* border_width */
black, /* border */
white); /* background */
Bool toggle = (strcmp(argv[1], "0") != 0);
SetSkipTaskbarHint(display, win, toggle);
XSelectInput(display, win, ButtonPressMask);
XMapWindow(display, win);
while (1) {
XEvent event;
XNextEvent(display, &event);
if (event.type == ButtonPress) {
XButtonEvent be = event.xbutton;
if (be.button == 2) {
toggle = !toggle;
SetSkipTaskbarHint(display, win, toggle);
}
}
}
return 0;
}
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