vim-patch:8.2.0083: text properties wrong when tabs and spaces are exchanged

Problem:    Text properties wrong when tabs and spaces are exchanged.
Solution:   Take text properties into account. (Nobuhiro Takasaki,
            closes vim/vim#5427)

https://github.com/vim/vim/commit/5cb0b93d52fa5c12ca50a18509947ee6459bb7a8

Co-authored-by: Bram Moolenaar <Bram@vim.org>

1 files changed, 9 insertions, 6 deletions

diff --git a/src/nvim/edit.c b/src/nvim/edit.c
index 595b4da589..436d43a4db 100644
--- a/src/nvim/edit.c
+++ b/src/nvim/edit.c
@@ -4421,18 +4421,21 @@ static bool ins_tab(void)
       // Delete following spaces.
       int i = cursor->col - fpos.col;
       if (i > 0) {
-        STRMOVE(ptr, ptr + i);
+        if (!(State & VREPLACE_FLAG)) {
+          memmove(ptr, ptr + i, (size_t)(curbuf->b_ml.ml_line_len - i
+                                         - (ptr - curbuf->b_ml.ml_line_ptr)));
+          curbuf->b_ml.ml_line_len -= i;
+          inserted_bytes(fpos.lnum, change_col,
+                         cursor->col - change_col, fpos.col - change_col);
+        } else {
+          STRMOVE(ptr, ptr + i);
+        }
         // correct replace stack.
         if ((State & REPLACE_FLAG) && !(State & VREPLACE_FLAG)) {
           for (temp = i; --temp >= 0;) {
             replace_join(repl_off);
           }
         }
-        if (!(State & VREPLACE_FLAG)) {
-          curbuf->b_ml.ml_line_len -= i;
-          inserted_bytes(fpos.lnum, change_col,
-                         cursor->col - change_col, fpos.col - change_col);
-        }
       }
       cursor->col -= i;