From 46e9c52030a6bc1c40cdeb31c3599fe71ec1ebe6 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Mon, 27 Apr 2015 15:03:04 -0700
Subject: [PATCH] cursor position in textarea.

---
 lib/widget.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/widget.js b/lib/widget.js
index fc7506b..1b16c6a 100644
--- a/lib/widget.js
+++ b/lib/widget.js
@@ -5901,7 +5901,7 @@ Textarea.prototype._updateCursor = function(get) {
   line = Math.max(0, line);
 
   cy = lpos.yi + this.itop + line;
-  cx = lpos.xi + this.ileft + last.length;
+  cx = lpos.xi + this.ileft + this._strWidth(last);
 
   // XXX Not sure, but this may still sometimes
   // cause problems when leaving editor.
@@ -5926,6 +5926,12 @@ Textarea.prototype._updateCursor = function(get) {
   }
 };
 
+Textarea.prototype._strWidth = function(str) {
+  if (!this.screen.fullUnicode) return str.length;
+  str = str.replace(/\x03/g, '');
+  return unicode.strWidth(str, 0);
+};
+
 Textarea.prototype.input =
 Textarea.prototype.setInput =
 Textarea.prototype.readInput = function(callback) {
@@ -6033,6 +6039,7 @@ Textarea.prototype._listener = function(ch, key) {
     if (this.value.length) {
       if (this.screen.fullUnicode) {
         if (unicode.isSurrogate(this.value, this.value.length - 2)) {
+        // || unicode.isCombining(this.value, this.value.length - 1)) {
           this.value = this.value.slice(0, -2);
         } else {
           this.value = this.value.slice(0, -1);