Handle transient hint and window class dialog to mark clients as floating

include/handlers.h

@@ -124,4 +124,14 @@ int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_wi
 int handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
                         xcb_atom_t name, xcb_get_property_reply_t *reply);
 
+/**
+ * Handles the transient for hints set by a window, signalizing that this window is a popup window
+ * for some other window.
+ *
+ * See ICCCM 4.1.2.6 for more details
+ *
+ */
+int handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
+                         xcb_atom_t name, xcb_get_property_reply_t *reply);
+
 #endif

include/i3.h

@@ -20,7 +20,7 @@
 #ifndef _I3_H
 #define _I3_H
 
-#define NUM_ATOMS 13
+#define NUM_ATOMS 14
 
 extern char **start_argv;
 extern Display *xkbdpy;

include/xcb.h

@@ -49,6 +49,7 @@ enum { _NET_SUPPORTED = 0,
         _NET_WM_STATE,
         _NET_WM_WINDOW_TYPE,
         _NET_WM_WINDOW_TYPE_DOCK,
+        _NET_WM_WINDOW_TYPE_DIALOG,
         _NET_WM_DESKTOP,
         _NET_WM_STRUT_PARTIAL,
         WM_PROTOCOLS,