1 files changed, 233 insertions, 0 deletions
diff --git a/autoload/vimtex/process.vim b/autoload/vimtex/process.vim
new file mode 100644
index 00000000..a22709c3
--- /dev/null
+++ b/autoload/vimtex/process.vim
@@ -0,0 +1,233 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'latex') == -1
+
+" vimtex - LaTeX plugin for Vim
+"
+" Maintainer: Karl Yngve Lervåg
+" Email:      karl.yngve@gmail.com
+"
+
+function! vimtex#process#new(...) abort " {{{1
+  let l:opts = a:0 > 0 ? a:1 : {}
+  return extend(deepcopy(s:process), l:opts)
+endfunction
+
+" }}}1
+function! vimtex#process#run(cmd, ...) abort " {{{1
+  let l:opts = a:0 > 0 ? a:1 : {}
+  let l:opts.cmd = a:cmd
+  let l:process = vimtex#process#new(l:opts)
+
+  return l:process.run()
+endfunction
+
+" }}}1
+function! vimtex#process#capture(cmd) abort " {{{1
+  return vimtex#process#run(a:cmd, {'capture': 1})
+endfunction
+
+" }}}1
+function! vimtex#process#start(cmd, ...) abort " {{{1
+  let l:opts = a:0 > 0 ? a:1 : {}
+  let l:opts.continuous = 1
+  return vimtex#process#run(a:cmd, l:opts)
+endfunction
+
+" }}}1
+
+let s:process = {
+      \ 'cmd' : '',
+      \ 'pid' : 0,
+      \ 'background' : 1,
+      \ 'continuous' : 0,
+      \ 'output' : '',
+      \ 'workdir' : '',
+      \ 'silent' : 1,
+      \ 'capture' : 0,
+      \ 'result' : '',
+      \}
+
+function! s:process.run() abort dict " {{{1
+  if self._do_not_run() | return | endif
+
+  call self._pre_run()
+  call self._prepare()
+  call self._execute()
+  call self._restore()
+  call self._post_run()
+
+  return self.capture ? self.result : self
+endfunction
+
+" }}}1
+function! s:process.stop() abort dict " {{{1
+  if !self.pid | return | endif
+
+  let l:cmd = has('win32')
+        \ ? 'taskkill /PID ' . self.pid . ' /T /F'
+        \ : 'kill ' . self.pid
+  call vimtex#process#run(l:cmd, {'background': 0})
+
+  let self.pid = 0
+endfunction
+
+" }}}1
+function! s:process.pprint_items() abort dict " {{{1
+  let l:list = [
+        \ ['pid', self.pid ? self.pid : '-'],
+        \ ['cmd', get(self, 'prepared_cmd', self.cmd)],
+        \]
+
+  return l:list
+endfunction
+
+" }}}1
+
+function! s:process._do_not_run() abort dict " {{{1
+  if empty(self.cmd)
+    call vimtex#log#warning('Can''t run empty command')
+    return 1
+  endif
+  if self.pid
+    call vimtex#log#warning('Process already running!')
+    return 1
+  endif
+
+  return 0
+endfunction
+
+" }}}1
+function! s:process._pre_run() abort dict " {{{1
+  if self.capture
+    let self.silent = 0
+    let self.background = 0
+  elseif empty(self.output) && self.background
+    let self.output = 'null'
+  endif
+
+  call vimtex#paths#pushd(self.workdir)
+endfunction
+
+" }}}1
+function! s:process._execute() abort dict " {{{1
+  if self.capture
+    let self.result = split(system(self.prepared_cmd), '\n')
+  elseif self.silent
+    silent call system(self.prepared_cmd)
+  elseif self.background
+    silent execute '!' . self.prepared_cmd
+    if !has('gui_running')
+      redraw!
+    endif
+  else
+    execute '!' . self.prepared_cmd
+  endif
+
+  " Capture the pid if relevant
+  if has_key(self, 'set_pid') && self.continuous
+    call self.set_pid()
+  endif
+endfunction
+
+" }}}1
+function! s:process._post_run() abort dict " {{{1
+  call vimtex#paths#popd()
+endfunction
+
+" }}}1
+
+if has('win32')
+  function! s:process._prepare() abort dict " {{{1
+    if &shell !~? 'cmd'
+      let self.win32_restore_shell = 1
+      let self.win32_saved_shell = [
+            \ &shell,
+            \ &shellcmdflag,
+            \ &shellxquote,
+            \ &shellxescape,
+            \ &shellquote,
+            \ &shellpipe,
+            \ &shellredir,
+            \ &shellslash
+            \]
+      set shell& shellcmdflag& shellxquote& shellxescape&
+      set shellquote& shellpipe& shellredir& shellslash&
+    else
+      let self.win32_restore_shell = 0
+    endif
+
+    let l:cmd = self.cmd
+
+    if self.background
+      if !empty(self.output)
+        let l:cmd .= self.output ==# 'null'
+              \ ? ' >nul'
+              \ : ' >'  . self.output
+        let l:cmd = 'cmd /s /c "' . l:cmd . '"'
+      else
+        let l:cmd = 'cmd /c "' . l:cmd . '"'
+      endif
+      let l:cmd = 'start /b ' . cmd
+    endif
+
+    if self.silent && self.output ==# 'null'
+      let self.prepared_cmd = '"' . l:cmd . '"'
+    else
+      let self.prepared_cmd = l:cmd
+    endif
+  endfunction
+
+  " }}}1
+  function! s:process._restore() abort dict " {{{1
+    if self.win32_restore_shell
+      let [   &shell,
+            \ &shellcmdflag,
+            \ &shellxquote,
+            \ &shellxescape,
+            \ &shellquote,
+            \ &shellpipe,
+            \ &shellredir,
+            \ &shellslash] = self.win32_saved_shell
+    endif
+  endfunction
+
+  " }}}1
+  function! s:process.get_pid() abort dict " {{{1
+    let self.pid = 0
+  endfunction
+
+  " }}}1
+else
+  function! s:process._prepare() abort dict " {{{1
+    let l:cmd = self.cmd
+
+    if self.background
+      if !empty(self.output)
+        let l:cmd .= ' >'
+              \ . (self.output ==# 'null'
+              \    ? '/dev/null'
+              \    : shellescape(self.output))
+              \ . ' 2>&1'
+      endif
+      let l:cmd .= ' &'
+    endif
+
+    if !self.silent
+      let l:cmd = escape(l:cmd, '%#')
+    endif
+
+    let self.prepared_cmd = l:cmd
+  endfunction
+
+  " }}}1
+  function! s:process._restore() abort dict " {{{1
+  endfunction
+
+  " }}}1
+  function! s:process.get_pid() abort dict " {{{1
+    let self.pid = 0
+  endfunction
+
+  " }}}1
+endif
+
+endif