From f3377fd818e6d39da8a586c77a671f8b7636cb0c Mon Sep 17 00:00:00 2001
From: nick black <dankamongmen@gmail.com>
Date: Sat, 2 Oct 2021 23:23:18 -0400
Subject: [PATCH] [automaton] handle XTGETTCAP, decoding MLterm and old Kitty
 #2225

---
 src/lib/in.c | 33 ++++++++++++++++++++-------------
 1 file changed, 20 insertions(+), 13 deletions(-)

diff --git a/src/lib/in.c b/src/lib/in.c
index 30a353672..6f2be26d1 100644
--- a/src/lib/in.c
+++ b/src/lib/in.c
@@ -765,21 +765,28 @@ xtversion_cb(inputctx* ictx){
 static int
 tcap_cb(inputctx* ictx){
   char* str = amata_next_string(&ictx->amata, "\x1bP1+r");
-  if(str){
-    loginfo("TCAP: %s\n", str);
+  if(str == NULL){
+    return 2;
+  }
+  loginfo("xtgettcap [%s]\n", str);
+  if(ictx->initdata == NULL){
     free(str);
+    return 2;
   }
-    /* FIXME
-  if(cap == 0x544e){ // 'TN' terminal name
-    loginfo("got TN capability %d\n", val);
-        if(strcmp(ictx->runstring, "xterm-kitty") == 0){
-          inits->qterm = TERMINAL_KITTY;
-        }else if(strcmp(ictx->runstring, "mlterm") == 0){
-          // MLterm prior to late 3.9.1 only reports via XTGETTCAP
-          inits->qterm = TERMINAL_MLTERM;
-        }
-        break;
-        */
+  // 'TN' (Terminal Name)
+  if(strncasecmp(str, "544e=", 5) == 0){
+    const char* tn = str + 5;
+    if(strcasecmp(tn, "6D6C7465726D") == 0){
+      ictx->initdata->qterm = TERMINAL_MLTERM;
+    }else if(strcasecmp(tn, "787465726d2d6b69747479") == 0){
+      ictx->initdata->qterm = TERMINAL_KITTY;
+    }else{
+      logdebug("unknown terminal name %s\n", tn);
+    }
+  }else{
+    logdebug("unknown capability=val %s\n", str);
+  }
+  free(str);
   return 2;
 }