vim-patch:8.0.1361: some users don't want to diff with hidden buffers

Problem:    Some users don't want to diff with hidden buffers.
Solution:   Add the "hiddenoff" item to 'diffopt'. (Alisue, closes vim/vim#2394)
https://github.com/vim/vim/commit/97ce419201421f65f4764549ed80307a7ef9c7a6

1 files changed, 10 insertions, 0 deletions

diff --git a/src/nvim/diff.c b/src/nvim/diff.c
index e7a176d336..878971a35c 100644
--- a/src/nvim/diff.c
+++ b/src/nvim/diff.c
@@ -44,6 +44,7 @@ static int diff_busy = FALSE;    // ex_diffgetput() is busy
 #define DIFF_IWHITE     4        // ignore change in white space
 #define DIFF_HORIZONTAL 8        // horizontal splits
 #define DIFF_VERTICAL   16       // vertical splits
+#define DIFF_HIDDEN_OFF 32       // diffoff when hidden
 static int diff_flags = DIFF_FILLER;
 
 #define LBUFLEN 50               // length of line in diff file
@@ -1838,6 +1839,9 @@ int diffopt_changed(void)
     } else if ((STRNCMP(p, "foldcolumn:", 11) == 0) && ascii_isdigit(p[11])) {
       p += 11;
       diff_foldcolumn_new = getdigits_int(&p);
+    } else if (STRNCMP(p, "hiddenoff", 9) == 0) {
+      p += 9;
+      diff_flags_new |= DIFF_HIDDEN_OFF;
     }
 
     if ((*p != ',') && (*p != NUL)) {
@@ -1880,6 +1884,12 @@ bool diffopt_horizontal(void)
   return (diff_flags & DIFF_HORIZONTAL) != 0;
 }
 
+// Return true if 'diffopt' contains "hiddenoff".
+bool diffopt_hiddenoff(void)
+{
+  return (diff_flags & DIFF_HIDDEN_OFF) != 0;
+}
+
 /// Find the difference within a changed line.
 ///
 /// @param  wp      window whose current buffer to check