From f6b876ef1f4c1621dc4822ace7673e45dd30ea0b Mon Sep 17 00:00:00 2001
From: Neil Hodgson <nyamatongwe@gmail.com>
Date: Tue, 20 Nov 2018 12:14:54 +1100
Subject: Bug [#2061]. Fix a crash that occurred when entering a dead key
 diacritic then a character that can not take that diacritic, such as option+e
 (acute accent) followed by g.

Backport of changeset 7171:d07ee885f2dd, but translated to C++11.
---
 cocoa/ScintillaCocoa.mm | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'cocoa')

diff --git a/cocoa/ScintillaCocoa.mm b/cocoa/ScintillaCocoa.mm
index ec78479b9..8d061205a 100644
--- a/cocoa/ScintillaCocoa.mm
+++ b/cocoa/ScintillaCocoa.mm
@@ -2284,7 +2284,18 @@ ptrdiff_t ScintillaCocoa::InsertText(NSString *input) {
 
   if (encoded.length() > 0)
   {
-    AddCharUTF(encoded.c_str(), static_cast<unsigned int>(encoded.length()), false);
+    if (encoding == kCFStringEncodingUTF8) {
+      // There may be multiple characters in input so loop over them
+      std::string sv = encoded;
+      while (sv.length()) {
+        const unsigned char leadByte = sv[0];
+        const unsigned int bytesInCharacter = UTF8BytesOfLead[leadByte];
+        AddCharUTF(sv.c_str(), bytesInCharacter, false);
+        sv = sv.substr(bytesInCharacter, sv.length());
+      }
+    } else {
+      AddCharUTF(encoded.c_str(), static_cast<unsigned int>(encoded.length()), false);
+		}
   }
   return encoded.length();
 }
-- 
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