From da40af5a2492be6b72e563976f6f00ff05d8b630 Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Sun, 20 May 2018 15:32:03 -0400
Subject: try to call synctex a bit less often

---
 vim/ftplugin/tex.vim | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

(limited to 'vim')

diff --git a/vim/ftplugin/tex.vim b/vim/ftplugin/tex.vim
index c600070..3a62790 100644
--- a/vim/ftplugin/tex.vim
+++ b/vim/ftplugin/tex.vim
@@ -30,13 +30,22 @@ function! s:is_running(re)
     return 0
 endfunction
 
-function! Synctex()
+function! s:synctex()
     if s:is_running('^zathura')
         exe "silent !zathura --synctex-forward " . line('.') . ":" . col('.') . ":" . expand('%:p') . " " . s:current_pdf()
         redraw
     endif
 endfunction
 
+let g:_tex_last_line_seen = -1
+function! s:cursor_moved()
+    let line = line('.')
+    if line != g:_tex_last_line_seen
+        call s:synctex()
+    endif
+    let g:_tex_last_line_seen = line
+endfunction
+
 " don't load the pdf if the make failed
 function! s:make_errors()
     let qf = getqflist()
@@ -53,7 +62,7 @@ augroup _tex
     if executable('zathura') && strlen(expand('$DISPLAY'))
         autocmd QuickFixCmdPost make if !s:make_errors() | call s:zathura() | endif
     endif
-    autocmd CursorMoved <buffer> call Synctex()
+    autocmd CursorMoved <buffer> call s:cursor_moved()
 augroup END
 
 " see :help errorformat-LaTeX
-- 
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