From af2265d59a0cbeff953af2d7a3e2765df82ecfb2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Sun, 8 Nov 2020 01:59:08 +0100
Subject: fix line breaking bug

---
 tea.c | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/tea.c b/tea.c
index 940c310..db1239d 100644
--- a/tea.c
+++ b/tea.c
@@ -103,18 +103,16 @@ int left() {}
 void breakline() {
 	prn("\r\n");
 	breaks[src_l + 1] = 1;
-	x = margin + 1;
-	prn(CSI "%dC", margin - 1);
+	x = margin;
 	if (y == h) yorig--;
 	else y++;
+	prn(CSI "%d;%dH", y, margin);
 }
 
 void addc(char c) {
 	char *tmp;
 	int i, *tmp2;
 
-	if (c != '\n' && x + 1 > w) breakline();
-	else x++;
 	if (src_l + 2 > src_s) {
 		src_s += 50;
 		tmp = realloc(src, (src_s + 1) * sizeof(char));
@@ -131,6 +129,10 @@ void addc(char c) {
 	src[src_l + 1] = '\0';
 }
 
+void delc() {
+	src[src_l--] = '\0';
+}
+
 int main() {
 	bool dot;
 	char c, *line, *p, *tmp;
@@ -208,8 +210,8 @@ int main() {
 		y = y - r;
 
 	/* restore original cursor position (CUP) */
-	prn(CSI "%d;%dH", yorig, xorig + margin - 1);
-	x = margin + 1;
+	prn(CSI "%d;%dH", yorig, margin);
+	x = margin;
 	y = yorig;
 
 	dot = false;
@@ -232,14 +234,22 @@ int main() {
 			breakline();
 			prn(CSI "0m");
 			break;
+		case 127: /* backspace */
+			if (x == margin || x == 1) break;
+			prn("\b");
+			delc();
+			x--;
+			break;
 		default:
 			if (iscntrl(c)) break;
-			if (x == margin + 1 && c == '.') {
+			if (x == margin && c == '.') {
 				prn(CSI "%dD", margin - 1);
 				prn(CSI "2m");
 			}
 			addc(c);
+			if (x + 1 > w) breakline();
 			prn("%c", c);
+			x++;
 			break;
 		}
 	}
-- 
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