add an IPC request to get the bar configuration (by ID)

include/i3/ipc.h

@@ -41,6 +41,9 @@
 /** Request the current defined marks from i3 */
 #define I3_IPC_MESSAGE_TYPE_GET_MARKS           5
 
+/** Request the configuration for a specific 'bar' */
+#define I3_IPC_MESSAGE_TYPE_GET_BAR_CONFIG      6
+
 /*
  * Messages from i3 to clients
  *
@@ -61,9 +64,12 @@
 /** Tree reply type */
 #define I3_IPC_REPLY_TYPE_TREE                  4
 
-/** Marks reply type*/
+/** Marks reply type */
 #define I3_IPC_REPLY_TYPE_MARKS                 5
 
+/** Bar config reply type */
+#define I3_IPC_REPLY_TYPE_BAR_CONFIG            6
+
 /*
  * Events from i3 to clients. Events have the first bit set high.
  *