# HG changeset patch
# User Christian Brabandt <cb@256bit.org>
# Date 1513114205 -3600
# Node ID 27934188d7b586e30ad7f72067a8a22e3f1e1f11
# Parent  999318b2de6823d7571b1a07a7dd3c051ce8a93c
patch 8.0.1388: char not overwritten with ambiguous width char

commit https://github.com/vim/vim/commit/fae8ed1fc8c06b28528d726e8440dfc66852bca8
Author: Bram Moolenaar <Bram@vim.org>
Date:   Tue Dec 12 22:29:30 2017 +0100

    patch 8.0.1388: char not overwritten with ambiguous width char

    Problem:    Char not overwritten with ambiguous width char, if the ambiguous
                char is single width but we reserve double-width space.
    Solution:   First clear the screen cells. (Ozaki Kiichi, closes #2436)

diff --git a/src/screen.c b/src/screen.c
--- a/src/screen.c
+++ b/src/screen.c
@@ -8317,15 +8317,29 @@ screen_char(unsigned off, int row, int c
     {
 	char_u	    buf[MB_MAXBYTES + 1];
 
-	/* Convert UTF-8 character to bytes and write it. */
-
-	buf[utfc_char2bytes(off, buf)] = NUL;
-
-	out_str(buf);
 	if (utf_ambiguous_width(ScreenLinesUC[off]))
+	{
+	    if (*p_ambw == 'd'
+# ifdef FEAT_GUI
+		    && !gui.in_use
+# endif
+		    )
+	    {
+		/* Clear the two screen cells. If the character is actually
+		 * single width it won't change the second cell. */
+		out_str((char_u *)"  ");
+		term_windgoto(row, col);
+	    }
+	    /* not sure where the cursor is after drawing the ambiguous width
+	     * character */
 	    screen_cur_col = 9999;
+	}
 	else if (utf_char2cells(ScreenLinesUC[off]) > 1)
 	    ++screen_cur_col;
+
+	/* Convert the UTF-8 character to bytes and write it. */
+	buf[utfc_char2bytes(off, buf)] = NUL;
+	out_str(buf);
     }
     else
 #endif
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1388,
+/**/
     1387,
 /**/
     1386,