list windows, coordinates, geometry and title

windows.c

#include <stdio.h>
#include <X11/Xutil.h>

/** 
 * $ gcc windows.c -o windows -lX11 && ./windows
 */

int main () {
  Atom actual_type;
  int format;
  unsigned long n_items, b_after;
  unsigned char *data = 0;

  Display *display = XOpenDisplay(NULL);
  Window root = DefaultRootWindow(display);
  Atom a = XInternAtom(display, "_NET_CLIENT_LIST", 1);
  int status = XGetWindowProperty(
    display, root, a, 0L, (~0L), 0, AnyPropertyType,
    &actual_type, &format, &n_items, &b_after, &data
  );

  printf("xid\t\tx\ty\tw\th\ttitle\n");

  if (status >= Success && n_items) {
    long *array = (long*) data;

    for (long k = 0; k < n_items; k++) {
      Window c_win = (Window) array[k];
      Window _win;
      XTextProperty t_prop;
      XWindowAttributes attrs;
      int rx, ry;

      if (
        XGetWMName(display, c_win, &t_prop) != 1 ||
        XGetWindowAttributes(display, c_win, &attrs) != 1 ||
        XTranslateCoordinates(
          display, c_win, attrs.root, -attrs.border_width,
          -attrs.border_width, &rx, &ry, &_win
        ) != 1
      ) {
        printf("warning: failed to get window properties, skipping\n");
        continue;
      }

      printf(
        "%d\t%d\t%d\t%d\t%d\t%s\n",
        (int) c_win, rx, ry, (attrs.x + attrs.width + attrs.x),
        (attrs.x + attrs.height + attrs.y), t_prop.value
      );
    }

    XFree(data);
  }

  return 0;
}

// vim: ts=2 sw=2 et :