From 64ddd43be943f0247dd8823a2564387dcb1aa622 Mon Sep 17 00:00:00 2001
From: Maxime Coste <mawww@kakoune.org>
Date: Wed, 24 Apr 2019 10:53:33 +0100
Subject: [PATCH] Only wrap before words that are shorter than the wrapping
 length

Closes #2820
---
 src/highlighters.cc | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/highlighters.cc b/src/highlighters.cc
index 14587429..2d9d39a4 100644
--- a/src/highlighters.cc
+++ b/src/highlighters.cc
@@ -868,9 +868,19 @@ struct WrapHighlighter : Highlighter
             }
         }
 
-        if (m_word_wrap and pos.byte < content.length()) // find a word boundary before current position
-            if (last_boundary.byte > 0)
-                pos = last_boundary;
+        if (m_word_wrap and pos.byte < content.length() and last_boundary.byte > 0)
+        {
+            // split at last word boundary if the word is shorter than our wrapping width
+            ColumnCount word_length = pos.column - last_boundary.column;
+            const char* it = &content[pos.byte]; 
+            while (it != content.end() and word_length <= wrap_column)
+            {
+                const Codepoint cp = utf8::read_codepoint(it, content.end());
+                if (not is_word<WORD>(cp))
+                    return last_boundary;
+                word_length += codepoint_width(cp);
+            }
+        }
 
         return pos;
     };