--- a/libnnchat.h	Sat Jun 11 09:49:42 2011 +0300
+++ b/libnnchat.h	Sat Jun 11 10:03:44 2011 +0300
@@ -30,6 +30,7 @@
 #define NN_CONNBUF_SIZE   (64 * 1024)
 #define NN_NUM_BUCKETS    (256)
 #define NN_DELAY_USEC     (15 * 1000)
+#define NN_BACKBUF_LEN    (512)       /* Backbuffer size (in lines) */
 
 typedef struct {
     ssize_t pos, len, size;
@@ -72,6 +73,19 @@
 } nn_conn_t;
 
 
+typedef struct {
+    qringbuf_t *data;   /* "Backbuffer" data for this window */
+    int pos;            /* Current position in the window, 0 = real time */
+    BOOL dirty;
+
+    char *id;           /* Chatter ID, NULL = main window */
+    int num;		/* Window number */
+    
+    char *buf;
+    size_t len, bufsize;
+} nn_window_t;
+
+
 const char *nn_get_errstr(int err);
 BOOL        nn_network_init(void);
 void        nn_network_close(void);
@@ -119,4 +133,7 @@
 char *      nn_editbuf_get_string(nn_editbuf_t *buf, ssize_t start, ssize_t end);
 
 
+nn_window_t *nn_window_new(const char *);
+void        nn_window_free(nn_window_t *);
+
 #endif