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/* -lX11 -lXtst */
#include <sys/select.h>
#include <errno.h>
#include <stdio.h>
#define XK_MISCELLANY
#define XK_LATIN1
#include <X11/Xlib.h>
#include <X11/keysymdef.h>
#include <X11/extensions/XTest.h>
static Display *disp;
static KeyCode mod, key[2];
static inline int
get_output(int x, int y)
{
/* TODO use "resolution changed:$(printf -- ' %ix%i%+i%+i' "$@")" message broadcast on BUS_VIDEO
* at start up look in ${XDG_RUNTIME_DIR}/x-display/${DISPLAY}/resolution for $(printf -- '%ix%i%+i%+i\n' "$@") */
return x < 1920;
}
static inline void
set_output(int output)
{
XTestFakeKeyEvent(disp, mod, 1, 0);
XTestFakeKeyEvent(disp, key[output], 1, 0);
XTestFakeKeyEvent(disp, key[output], 0, 0);
XTestFakeKeyEvent(disp, mod, 0, 0);
XFlush(disp);
}
int
main(int argc, char *argv[])
{
int fd, scrn;
Window root;
fd_set fds;
XEvent ev;
int output, prev_output = -1;
XSetLocaleModifiers("");
if (!(disp = XOpenDisplay(NULL))) {
fprintf(stderr, "%s: cannot open display\n", *argv);
return 1;
}
fd = XConnectionNumber(disp);
scrn = XDefaultScreen(disp);
root = XRootWindow(disp, scrn);
XSelectInput(disp, root, PointerMotionMask | EnterWindowMask);
XSync(disp, False);
mod = XKeysymToKeycode(disp, XK_Super_L);
key[0] = XKeysymToKeycode(disp, XK_W);
key[1] = XKeysymToKeycode(disp, XK_E);
for (;;) {
FD_ZERO(&fds);
FD_SET(fd, &fds);
if (select(fd + 1, &fds, NULL, NULL, NULL) < 0) {
if (errno == EINTR)
continue;
perror(*argv);
return 1;
}
if (!FD_ISSET(fd, &fds))
continue;
while (XPending(disp)) {
XNextEvent(disp, &ev);
if (XFilterEvent(&ev, None))
continue;
switch (ev.type) {
case MotionNotify:
output = get_output(ev.xmotion.x_root, ev.xmotion.y_root);
if (output == prev_output)
continue;
prev_output = output;
set_output(output);
break;
case EnterNotify:
prev_output = -1;
break;
default:
break;
}
}
}
return 0;
(void) argc;
}
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