Add an option to reparent a window

doc/xdo.1.txt

@@ -55,6 +55,9 @@ Actions
 *resize*::
   Resize the window.
 
+*reparent*::
+  Reparent the window into the target (see *-t*).
+
 *activate*::
   Activate the window.
 
@@ -111,7 +114,7 @@ When options are provided, the action applies to all the children of the root wi
   The window has the given wm name.
 
 *-t* 'WID'::
-  The target window for the *below* and *above* actions.
+  The target window for the *below*, *above* and *reparent* actions.
 
 *-p* 'PID'::
   The window has the given pid.

xdo.c

@@ -35,6 +35,8 @@ int main(int argc, char *argv[])
 		action = window_move;
 	} else if (strcmp(argv[1], "resize") == 0) {
 		action = window_resize;
+	} else if (strcmp(argv[1], "reparent") == 0) {
+		action = window_reparent;
 	} else if (strcmp(argv[1], "close") == 0) {
 		action = window_close;
 	} else if (strcmp(argv[1], "kill") == 0) {
@@ -452,6 +454,13 @@ void window_resize(xcb_window_t win)
 
 #undef SETGEOM
 
+void window_reparent(xcb_window_t win)
+{
+	if (cfg.target == 0)
+		err("reparent requires target (-t) argument\n");
+	xcb_reparent_window(dpy, win, cfg.target, 0, 0);
+}
+
 void window_activate(xcb_window_t win)
 {
 	xcb_ewmh_request_change_active_window(ewmh, default_screen, win, XCB_EWMH_CLIENT_SOURCE_TYPE_OTHER, XCB_CURRENT_TIME, XCB_NONE);

xdo.h

@@ -64,6 +64,7 @@ void window_above(xcb_window_t win);
 void window_below(xcb_window_t win);
 void window_move(xcb_window_t win);
 void window_resize(xcb_window_t win);
+void window_reparent(xcb_window_t win);
 void window_activate(xcb_window_t win);
 void window_id(xcb_window_t win);
 void window_pid(xcb_window_t win);