From 3e63a124485bc92939f52c501f7f63cfcc4b52a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karl=20Yngve=20Lerv=C3=A5g?= <karl.yngve+git@gmail.com>
Date: Tue, 10 Jan 2017 23:14:06 +0100
Subject: [PATCH] Only indent tikz if tikz is loaded

---
 autoload/vimtex.vim          | 11 ++++++++++-
 indent/tex.vim               |  2 ++
 test/vader/indentation.vader |  5 +++--
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/autoload/vimtex.vim b/autoload/vimtex.vim
index 03cc8ad..be1c9ab 100644
--- a/autoload/vimtex.vim
+++ b/autoload/vimtex.vim
@@ -485,8 +485,17 @@ endfunction
 
 " }}}1
 function! s:init_local_options() " {{{1
-  let b:vimtex.sources = []
+  let b:vimtex.packages = {}
+  for l:line in vimtex#parser#tex(b:vimtex.tex, {
+        \ 'detailed' : 0,
+        \ 're_stop' : '\\begin\s*{document}',
+        \})
+    if l:line =~# '\\usepackage.*{tikz}'
+      let b:vimtex.packages.tikz = 1
+    endif
+  endfor
 
+  let b:vimtex.sources = []
   for [l:file, l:lnum, l:line] in vimtex#parser#tex(b:vimtex.tex)
     let l:cand = substitute(l:file, '\M' . b:vimtex.root, '', '')
     if l:cand[0] ==# '/' | let l:cand = l:cand[1:] | endif
diff --git a/indent/tex.vim b/indent/tex.vim
index 36ad3fe..2c4188a 100644
--- a/indent/tex.vim
+++ b/indent/tex.vim
@@ -138,6 +138,8 @@ let s:re_delims = vimtex#delim#get_delim_regexes()
 
 " }}}1
 function! s:indent_tikz(lnum, prev) " {{{1
+  if !has_key(b:vimtex.packages, 'tikz') | return 0 | endif
+
   let l:env_lnum = vimtex#env#is_inside('tikzpicture')
   if l:env_lnum > 0 && l:env_lnum < a:lnum
     let l:prev_starts = a:prev =~# s:tikz_commands
diff --git a/test/vader/indentation.vader b/test/vader/indentation.vader
index 257a085..004fa97 100644
--- a/test/vader/indentation.vader
+++ b/test/vader/indentation.vader
@@ -141,8 +141,9 @@ Given tex (Indent: tikz):
     \end{axis}
        \end{tikzpicture}
 
-Do (Indent):
-  gg=G
+Execute (Indent):
+  let b:vimtex.packages.tikz = 1
+  normal gg=G
 
 Expect tex (Verify):
   \tikz \fill[green] rectangle (0.5,0.5); Something