Handle FocusIn events generated by clients and update decoration accordingly (Thanks mseed)

include/handlers.h

@@ -215,4 +215,5 @@ int handle_clientleader_change(void *data, xcb_connection_t *conn,
                                uint8_t state, xcb_window_t window,
                                xcb_atom_t name, xcb_get_property_reply_t *prop);
 
+int handle_focus_in(void *data, xcb_connection_t *conn, xcb_focus_in_event_t *event);
 #endif

include/x.h

@@ -5,6 +5,9 @@
 #ifndef _X_H
 #define _X_H
 
+/** Stores the X11 window ID of the currently focused window */
+extern xcb_window_t focused_id;
+
 /**
  * Initializes the X11 part for the given container. Called exactly once for
  * every container from con_new().

include/xcb.h

@@ -3,7 +3,7 @@
  *
  * i3 - an improved dynamic tiling window manager
  *
- * (c) 2009 Michael Stapelberg and contributors
+ * © 2009-2011 Michael Stapelberg and contributors
  *
  * See file LICENSE for license information.
  *
@@ -32,7 +32,8 @@
    while rendering the layout) */
 /** The XCB_CW_EVENT_MASK for the child (= real window) */
 #define CHILD_EVENT_MASK (XCB_EVENT_MASK_PROPERTY_CHANGE | \
-                          XCB_EVENT_MASK_STRUCTURE_NOTIFY)
+                          XCB_EVENT_MASK_STRUCTURE_NOTIFY | \
+                          XCB_EVENT_MASK_FOCUS_CHANGE)
 
 /** The XCB_CW_EVENT_MASK for its frame */
 #define FRAME_EVENT_MASK (XCB_EVENT_MASK_BUTTON_PRESS |          /* …mouse is pressed/released */ \