vim-patch:7.4.1988

Problem:    When updating viminfo with file marks there is no time order.
Solution:   Remember the time when a buffer was last used, store marks for
            the most recently used buffers.
ab9c89b68d

As this is a viminfo fix, most of this is irrelevant - the patch has
just been brought across for the creation and updating of buffer's
`b_last_used` properties.

src/nvim/buffer.c

@@ -1618,6 +1618,7 @@ void enter_buffer(buf_T *buf)
   if (!curbuf->b_help && curwin->w_p_spell && *curwin->w_s->b_p_spl != NUL) {
     (void)did_set_spelllang(curwin);
   }
+  curbuf->b_last_used = time(NULL);
 
   redraw_later(NOT_VALID);
 }

src/nvim/buffer_defs.h

@@ -543,6 +543,8 @@ struct file_buffer {
   long b_mtime_read;            // last change time when reading
   uint64_t b_orig_size;         // size of original file in bytes
   int b_orig_mode;              // mode of original file
+  time_t b_last_used;           // time when the buffer was last used; used
+                                // for viminfo
 
   fmark_T b_namedm[NMARKS];     // current named marks (mark.c)
 

src/nvim/ex_cmds.c

@@ -2670,6 +2670,8 @@ int do_ecmd(
     msg_scrolled_ign = FALSE;
   }
 
+  curbuf->b_last_used = time(NULL);
+
   if (command != NULL)
     do_cmdline(command, NULL, NULL, DOCMD_VERBOSE);
 

src/nvim/normal.c

@@ -1260,6 +1260,8 @@ static void normal_redraw(NormalState *s)
     maketitle();
   }
 
+  curbuf->b_last_used = time(NULL);
+
   // Display message after redraw. If an external message is still visible,
   // it contains the kept message already.
   if (keep_msg != NULL && !msg_ext_is_visible()) {