From a0938e068f99b56a3474fd739f1a3f52240d28f7 Mon Sep 17 00:00:00 2001
From: Jan Edmund Lazo <janedmundlazo@hotmail.com>
Date: Wed, 15 Aug 2018 01:13:38 -0400
Subject: vim-patch:8.0.1633: a TextChanged autocmd triggers when it is defined

Problem:    A TextChanged autocmd triggers when it is defined after creating a
            buffer.
Solution:   Set b_last_changedtick when opening a buffer. (Hirohito Highlight,
            closes vim/vim#2742)
https://github.com/vim/vim/commit/8c64a36e40b8746404f7151abe6849393396af10
---
 src/nvim/buffer.c                 |  5 +++++
 src/nvim/testdir/test_autocmd.vim | 21 +++++++++++++++++++++
 2 files changed, 26 insertions(+)

(limited to 'src')

diff --git a/src/nvim/buffer.c b/src/nvim/buffer.c
index 3fadcc75bf..00d472b4c8 100644
--- a/src/nvim/buffer.c
+++ b/src/nvim/buffer.c
@@ -296,6 +296,11 @@ open_buffer (
   }
   save_file_ff(curbuf);                 // keep this fileformat
 
+  // Set last_changedtick to avoid triggering a TextChanged autocommand right
+  // after it was added.
+  curbuf->b_last_changedtick = buf_get_changedtick(curbuf);
+  curbuf->b_last_changedtick_pum = buf_get_changedtick(curbuf);
+
   /* require "!" to overwrite the file, because it wasn't read completely */
   if (aborting())
     curbuf->b_flags |= BF_READERR;
diff --git a/src/nvim/testdir/test_autocmd.vim b/src/nvim/testdir/test_autocmd.vim
index 7173558d50..b1502eff89 100644
--- a/src/nvim/testdir/test_autocmd.vim
+++ b/src/nvim/testdir/test_autocmd.vim
@@ -1,5 +1,7 @@
 " Tests for autocommands
 
+source shared.vim
+
 func! s:cleanup_buffers() abort
   for bnr in range(1, bufnr('$'))
     if bufloaded(bnr) && bufnr('%') != bnr
@@ -1269,3 +1271,22 @@ func Test_TextChangedI_with_setline()
   call test_override('starting', 0)
   bwipe!
 endfunc
+
+func Test_Changed_FirstTime()
+  if !has('terminal') || has('gui_running')
+    return
+  endif
+  " Prepare file for TextChanged event.
+  call writefile([''], 'Xchanged.txt')
+  let buf = term_start([GetVimProg(), '--clean', '-c', 'set noswapfile'], {'term_rows': 3})
+  call assert_equal('running', term_getstatus(buf))
+  " It's only adding autocmd, so that no event occurs.
+  call term_sendkeys(buf, ":au! TextChanged <buffer> call writefile(['No'], 'Xchanged.txt')\<cr>")
+  call term_sendkeys(buf, "\<C-\\>\<C-N>:qa!\<cr>")
+  call WaitFor({-> term_getstatus(buf) == 'finished'})
+  call assert_equal([''], readfile('Xchanged.txt'))
+
+  " clean up
+  call delete('Xchanged.txt')
+  bwipe!
+endfunc
-- 
cgit