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#define _POSIX_C_SOURCE 200809L
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <X11/Xlib.h>
/* MAJE_LDLIB=-lX11 */
#define WM_STATE_FORMAT 32
static Bool is_normal(Display *dpy, Window win)
{
static Atom state = None;
if (state == None) {
state = XInternAtom(dpy, "WM_STATE", True);
if (state == None) {
return False;
}
}
Atom type = AnyPropertyType;
int format = WM_STATE_FORMAT;
unsigned long nitems = 0;
unsigned long bytes = 0;
unsigned char *prop = NULL;
int r = XGetWindowProperty(dpy,
win,
state,
0,
0,
False,
type,
&type,
&format,
&nitems,
&bytes,
&prop);
if (r == Success && prop != NULL) {
XFree(prop);
return True;
}
return False;
}
static Window find_normal_parent(Display *dpy, Window win)
{
if (win == PointerRoot || win == None || is_normal(dpy, win)) {
return win;
}
Window root = win, parent = win, *children = NULL;
unsigned int nchildren = 0;
if (!XQueryTree(dpy, win, &root, &parent, &children, &nchildren)) {
return None;
}
if (parent == win || is_normal(dpy, parent)) {
return parent;
}
return find_normal_parent(dpy, win);
}
static int xsnap_error(Display *dpy, XErrorEvent *e)
{
char buf[BUFSIZ];
XGetErrorText(dpy, e->error_code, buf, sizeof(buf));
fprintf(stderr, "xsnap: %s\n", buf);
exit(1);
}
int main(int argc, char *argv[])
{
enum { NONE, LEFT, RIGHT, UP, DOWN } dir = NONE;
int c = 0;
while ((c = getopt(argc, argv, "lrud")) != -1) {
switch (c) {
case 'l':
dir = LEFT;
break;
case 'r':
dir = RIGHT;
break;
case 'u':
dir = UP;
break;
case 'd':
dir = DOWN;
break;
default:
return 1;
}
}
if (dir == NONE) {
fprintf(stderr, "xsnap: missing direction\n");
return 1;
}
/* TODO: if operand, use that, otherwise find focused */
Display *dpy = XOpenDisplay(NULL);
XSetErrorHandler(xsnap_error);
Window root = XDefaultRootWindow(dpy);
Window focused = root;
int revert = RevertToNone;
XGetInputFocus(dpy, &focused, &revert);
focused = find_normal_parent(dpy, focused);
XWindowAttributes rootattr = { 0 };
XGetWindowAttributes(dpy, root, &rootattr);
XWindowAttributes attributes = { 0 };
XGetWindowAttributes(dpy, focused, &attributes);
if (!attributes.override_redirect) {
fprintf(stderr, "can't override redirect\n");
exit(1);
}
int x = 0;
int y = 0;
unsigned w = 0;
unsigned h = 0;
switch (dir) {
case LEFT:
x = 0;
y = 0;
w = rootattr.width / 2;
h = rootattr.height;
break;
case RIGHT:
x = rootattr.width / 2;
y = 0;
w = rootattr.width / 2;
h = rootattr.height;
break;
case UP:
x = 0;
y = 0;
w = rootattr.width;
h = rootattr.height / 2;
break;
case DOWN:
x = 0;
y = rootattr.height / 2;
w = rootattr.width;
h = rootattr.height / 2;
break;
default:
fprintf(stderr, "somehow missing direction\n");
return 1;
break;
}
int r = XMoveResizeWindow(dpy, focused, x, y, w ? w : 1, h ? h : 1);
if (r != 0) {
XErrorEvent e = { .error_code = r };
xsnap_error(dpy, &e);
}
return 0;
}
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