Initial version of VimtexWordCount (#166)

It has some more potential for improvement, both in how the count is
displayed after `:VimtexWordCount` and in adding some options.

README.md

@@ -24,6 +24,7 @@ disabled if desired.
 - Document navigation through
   - table of content
   - table of labels
+- Word count (through `texcount`)
 - Motions
   - Move between sections with `[[`, `[]`, `][`, `]]`
   - Move between matching delimiters with `%`

autoload/vimtex.vim

@@ -51,6 +51,7 @@ function! vimtex#info() " {{{1
     for f in ['aux', 'out', 'log']
       silent execute 'let d.' . f . ' = data.' . f . '()'
     endfor
+    let d.words = data.words()
 
     " Print data blob title line
     call vimtex#echo#formatted([
@@ -90,6 +91,7 @@ function! s:init_environment() " {{{1
     function data.out() dict
       return s:get_main_ext(self, 'pdf')
     endfunction
+    let data.words = function('s:get_wordcount')
 
     call add(g:vimtex#data, data)
     let b:vimtex.id = len(g:vimtex#data) - 1
@@ -97,6 +99,8 @@ function! s:init_environment() " {{{1
 
   " Define commands
   command! -buffer VimtexInfo call vimtex#info()
+  command! -buffer VimtexWordCount
+        \ echo g:vimtex#data[b:vimtex.id].words()
 
   " Define mappings
   nnoremap <buffer> <plug>(vimtex-info) :call vimtex#info()<cr>
@@ -291,6 +295,14 @@ function! s:get_main_ext(self, ext) " {{{1
   return ''
 endfunction
 
+" }}}1
+function! s:get_wordcount() dict " {{{1
+  let cmd  = 'cd ' . vimtex#util#fnameescape(self.root)
+  let cmd .= '; texcount -sum -brief -merge '
+        \ . vimtex#util#fnameescape(self.base)
+  return str2nr(matchstr(system(cmd), '^\d\+'))
+endfunction
+
 " }}}1
 
 function! s:print_dict(dict, ...) " {{{1

doc/vimtex.txt

@@ -78,6 +78,7 @@ Feature overview~
 - Document navigation through
   - table of content
   - table of labels
+- Word count (through `texcount`)
 - Motions
   - Move between sections with `[[`, `[]`, `][`, `]]`
   - Move between matching delimiters with `%`
@@ -729,6 +730,13 @@ Commands~
                                              *<plug>(vimtex-reverse-search)*
 :VimtexRSearch            Do reverse search (only available for MuPDF viewer).
 
+                                             *VimtexWordCount*
+:VimtexWordCount          Shows the number of words in the current project.
+                          The count is created with `texcount` through a call
+                          on the main project file similar to: >
+
+                            texcount -sum -brief -merge FILE
+<
 ------------------------------------------------------------------------------
 Map definitions~
                                                               *vimtex-mappings*