patch 9.1.0132: "C" doesn't include composing chars with 'virtualedit'v9.1.0132

Problem:  using "C" and 've=all' set, doesn't include composing chars
          when changing a line, keeps the composing chars for whatever
          is typed afterwards.
Solution: Use mb_head_off() and mb_ptr2len() instead of mb_tail_off().
          (zeertzjq)

closes: #14083

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

3 files changed, 29 insertions, 3 deletions

diff --git a/src/ops.c b/src/ops.c
index e66b4b5ee7..57e699150f 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -990,13 +990,20 @@ setmarks:
     static void
 mb_adjust_opend(oparg_T *oap)
 {
-    char_u	*p;
+    char_u	*line;
+    char_u	*ptr;
 
     if (!oap->inclusive)
 	return;
 
-    p = ml_get(oap->end.lnum);
-    oap->end.col += mb_tail_off(p, p + oap->end.col);
+    line = ml_get(oap->end.lnum);
+    ptr = line + oap->end.col;
+    if (*ptr != NUL)
+    {
+	ptr -= (*mb_head_off)(line, ptr);
+	ptr += (*mb_ptr2len)(ptr) - 1;
+	oap->end.col = ptr - line;
+    }
 }
 
 /*
diff --git a/src/testdir/test_virtualedit.vim b/src/testdir/test_virtualedit.vim
index ec2b276c3f..48d4aa0616 100644
--- a/src/testdir/test_virtualedit.vim
+++ b/src/testdir/test_virtualedit.vim
@@ -77,13 +77,30 @@ endfunc
 func Test_edit_change()
   new
   set virtualedit=all
+
   call setline(1, "\t⒌")
   normal Cx
   call assert_equal('x', getline(1))
+
+  call setline(1, "\ta̳")
+  normal Cx
+  call assert_equal('x', getline(1))
+
+  call setline(1, "\tβ̳")
+  normal Cx
+  call assert_equal('x', getline(1))
+
+  if has('arabic')
+    call setline(1, "\tلا")
+    normal Cx
+    call assert_equal('x', getline(1))
+  endif
+
   " Do a visual block change
   call setline(1, ['a', 'b', 'c'])
   exe "normal gg3l\<C-V>2jcx"
   call assert_equal(['a  x', 'b  x', 'c  x'], getline(1, '$'))
+
   bwipe!
   set virtualedit=
 endfunc
diff --git a/src/version.c b/src/version.c
index a80f2a87b5..59a940ba09 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    132,
+/**/
     131,
 /**/
     130,