From 0e999482cb13c194427d47687a49473e1e240a20 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Mon, 25 Dec 2023 17:05:14 +0900
Subject: Fix handling of empty ANSI color sequence

Fix #3320
---
 src/ansi.go | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/ansi.go')

diff --git a/src/ansi.go b/src/ansi.go
index 05e08613..e917a4f2 100644
--- a/src/ansi.go
+++ b/src/ansi.go
@@ -351,9 +351,11 @@ func interpretCode(ansiCode string, prevState *ansiState) ansiState {
 	ptr := &state.fg
 
 	var delimiter byte = 0
+	count := 0
 	for len(ansiCode) != 0 {
 		var num int
 		if num, delimiter, ansiCode = parseAnsiCode(ansiCode, delimiter); num != -1 {
+			count++
 			switch state256 {
 			case 0:
 				switch num {
@@ -435,6 +437,13 @@ func interpretCode(ansiCode string, prevState *ansiState) ansiState {
 		}
 	}
 
+	// Empty sequence: reset
+	if count == 0 {
+		state.fg = -1
+		state.bg = -1
+		state.attr = 0
+	}
+
 	if state256 > 0 {
 		*ptr = -1
 	}
-- 
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