From 5d0c105b104654093a479fd4c4027589023c4d4a Mon Sep 17 00:00:00 2001
From: Přemysl Eric Janouch <p@janouch.name>
Date: Wed, 21 Oct 2020 23:33:32 +0200
Subject: Make backspace erase combining characters

They might not be even printed correctly, though.

Updates #4
---
 sdn.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/sdn.cpp b/sdn.cpp
index 74b70cf..fb65d7d 100644
--- a/sdn.cpp
+++ b/sdn.cpp
@@ -1186,8 +1186,13 @@ fun handle_editor (wint_t c) {
 		g.editor_on_confirm = nullptr;
 		break;
 	case ACTION_INPUT_B_DELETE:
-		if (g.editor_cursor > 0)
-			g.editor_line.erase (--g.editor_cursor, 1);
+		// Remove the last character including its postfix combining characters
+		while (g.editor_cursor > 0) {
+			auto erased = g.editor_line.at (--g.editor_cursor);
+			g.editor_line.erase (g.editor_cursor, 1);
+			if (wcwidth (erased))
+				break;
+		}
 		break;
 	default:
 		if (c & (ALT | SYM)) {
-- 
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