From 5e8bd7606f26abce289b94c905db65487926bc9c Mon Sep 17 00:00:00 2001
From: Marc Andre Tanner <mat@brain-dump.org>
Date: Mon, 14 Jan 2008 22:27:47 +0100
Subject: [PATCH] Add the possibility to register custom escape sequence
 handlers.

Signed-off-by: Marc Andre Tanner <mat@brain-dump.org>
---
 madtty/madtty.c | 20 ++++++++++++++++----
 madtty/madtty.h | 22 +++++++++++++++++++++-
 2 files changed, 37 insertions(+), 5 deletions(-)

diff --git a/madtty/madtty.c b/madtty/madtty.c
index 317712c..1718b83 100644
--- a/madtty/madtty.c
+++ b/madtty/madtty.c
@@ -106,6 +106,7 @@ struct madtty_t {
     char rbuf[BUFSIZ];
     char ebuf[BUFSIZ];
     int  rlen, elen;
+    madtty_handler_t handler;
 };
 
 typedef struct t_row_t {
@@ -597,11 +598,17 @@ static void es_interpret_csi(madtty_t *t)
 static void try_interpret_escape_seq(madtty_t *t)
 {
     char lastchar  = t->ebuf[t->elen-1];
-
+    if(!*t->ebuf)
+       return;
+    if(t->handler){
+       switch((*(t->handler))(t, t->ebuf)){
+          case MADTTY_HANDLER_OK:
+	     goto cancel;
+          case MADTTY_HANDLER_NOTYET:
+	     return;
+       }
+    }
     switch (*t->ebuf) {
-      case '\0':
-        return;
-
       case 'M':
         interpret_csi_SR(t);
         cancel_escape_sequence(t);
@@ -1083,3 +1090,8 @@ int madtty_color_pair(int fg, int bg)
         bg = COLOR_BLACK;
     return COLOR_PAIR((7 - fg) * 8 + bg);
 }
+
+void madtty_set_handler(madtty_t *t, madtty_handler_t handler)
+{
+    t->handler = handler;
+}
diff --git a/madtty/madtty.h b/madtty/madtty.h
index 8e8424a..0a1e451 100644
--- a/madtty/madtty.h
+++ b/madtty/madtty.h
@@ -30,11 +30,31 @@
 #include <unistd.h>
 #include <wchar.h>
 
+enum {
+    /* means escape sequence was handled */
+    MADTTY_HANDLER_OK,
+    /* means the escape sequence was not  recognized yet, but
+     * there is hope that it still will once more characters
+     * arrive (i.e. it is not yet complete).
+     *
+     * The library will thus continue collecting characters
+     * and calling the handler as each character arrives until
+     * either OK or NOWAY is returned.
+     */
+    MADTTY_HANDLER_NOTYET,
+    /* means the escape sequence was not recognized, and there
+     * is no chance that it will even if more characters  are
+     * added to it.
+     */
+    MADTTY_HANDLER_NOWAY
+};
+
 typedef struct madtty_t madtty_t;
+typedef int (*madtty_handler_t)(madtty_t *, char *es);
 
 void madtty_init_colors(void);
 void madtty_init_vt100_graphics(void);
-
+void madtty_set_handler(madtty_t *, madtty_handler_t);
 int madtty_color_pair(int fg, int bg);
 
 madtty_t *madtty_create(int rows, int cols);
-- 
2.20.1