From c029a0c9130b7a9b5a9c3883e813dd8d8a0a770d Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@felloff.net>
Date: Sat, 22 Apr 2017 21:07:53 +0200
Subject: [PATCH] vt: handle insert/delete/home/end keys for vt220/xterm

---
 sys/src/cmd/vt/cons.h |  2 +-
 sys/src/cmd/vt/main.c | 43 ++++++++++++++++++++++++++++++++++---------
 sys/src/cmd/vt/vt.c   | 10 +++++++++-
 3 files changed, 44 insertions(+), 11 deletions(-)

diff --git a/sys/src/cmd/vt/cons.h b/sys/src/cmd/vt/cons.h
index 8b521af10..b4bafdb68 100644
--- a/sys/src/cmd/vt/cons.h
+++ b/sys/src/cmd/vt/cons.h
@@ -40,7 +40,7 @@ struct funckey {
 	char	*sequence;
 };
 extern struct funckey *fk, *appfk;
-extern struct funckey ansifk[], ansiappfk[], xtermfk[];
+extern struct funckey ansifk[], ansiappfk[], vt220fk[];
 
 extern int	x, y, xmax, ymax, olines;
 extern int	peekc, attribute;
diff --git a/sys/src/cmd/vt/main.c b/sys/src/cmd/vt/main.c
index 8006c8184..467356069 100644
--- a/sys/src/cmd/vt/main.c
+++ b/sys/src/cmd/vt/main.c
@@ -219,6 +219,7 @@ initialize(int argc, char **argv)
 	attr = defattr;
 	ARGBEGIN{
 	case '2':
+		fk = vt220fk;
 		term = "vt220";
 		break;
 	case 'a':
@@ -240,7 +241,7 @@ initialize(int argc, char **argv)
 			sysfatal("could not create log file: %s: %r", p);
 		break;
 	case 'x':
-		fk = xtermfk;
+		fk = vt220fk;
 		term = "xterm";
 		break;
 	case 'r':
@@ -531,14 +532,17 @@ lookfk(struct funckey *fk, char *name)
 	return nil;
 }
 
-void
+int
 sendfk(char *name)
 {
 	char *s = lookfk(appfk != nil ? appfk : fk, name);
 	if(s == nil && appfk != nil)
 		s = lookfk(fk, name);
-	if(s != nil)
+	if(s != nil){
 		sendnchars(strlen(s), s);
+		return 1;
+	}
+	return 0;
 }
 
 int
@@ -570,6 +574,30 @@ waitchar(void)
 				resize_flag = 1;
 			if(cs->raw) {
 				switch(kbdchar){
+				case Kins:
+					if(!sendfk("insert"))
+						goto Send;
+					break;
+				case Kdel:
+					if(!sendfk("delete"))
+						goto Send;
+					break;
+				case Khome:
+					if(!sendfk("home"))
+						goto Send;
+					break;
+				case Kend:
+					if(!sendfk("end"))
+						goto Send;
+					break;
+
+				case Kpgup:
+					sendfk("page up");
+					break;
+				case Kpgdown:
+					sendfk("page down");
+					break;
+
 				case Kup:
 					sendfk("up key");
 					break;
@@ -582,12 +610,7 @@ waitchar(void)
 				case Kright:
 					sendfk("right key");
 					break;
-				case Kpgup:
-					sendfk("page up");
-					break;
-				case Kpgdown:
-					sendfk("page down");
-					break;
+
 				case KF|1:
 					sendfk("F1");
 					break;
@@ -624,6 +647,7 @@ waitchar(void)
 				case KF|12:
 					sendfk("F12");
 					break;
+
 				case '\n':
 					echobuf[0] = '\r';
 					sendnchars(1, echobuf);
@@ -633,6 +657,7 @@ waitchar(void)
 					sendnchars(1, echobuf);
 					break;
 				default:
+				Send:
 					sendnchars(runetochar(echobuf, &kbdchar), echobuf);
 					break;
 				}
diff --git a/sys/src/cmd/vt/vt.c b/sys/src/cmd/vt/vt.c
index 457cbc94c..9a0c0fc48 100644
--- a/sys/src/cmd/vt/vt.c
+++ b/sys/src/cmd/vt/vt.c
@@ -57,16 +57,23 @@ struct funckey ansiappfk[] = {
 	{ "down key",		"\033OB", },
 	{ "left key",		"\033OD", },
 	{ "right key",		"\033OC", },
+	
 	{ 0 },
 };
 
-struct funckey xtermfk[] = {
+struct funckey vt220fk[] = {
+	{ "insert",		"\033[2~", },
+	{ "delete",		"\033[3~", },
+	{ "home",		"\033[1~", },
+	{ "end",		"\033[4~", },
 	{ "page up",		"\033[5~", },
 	{ "page down",		"\033[6~", },
+
 	{ "up key",		"\033[A", },
 	{ "down key",		"\033[B", },
 	{ "left key",		"\033[D", },
 	{ "right key",		"\033[C", },
+
 	{ "F1",			"\033OP", },
 	{ "F2",			"\033OQ", },
 	{ "F3",			"\033OR", },
@@ -79,6 +86,7 @@ struct funckey xtermfk[] = {
 	{ "F10",		"\033[21~", },
 	{ "F11",		"\033[23~", },
 	{ "F12",		"\033[24~", },
+
 	{ 0 },
 };