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" Copyright (C) 2012 Hong Xu
" This file is part of vim-live-preview.
" vim-live-preview is free software: you can redistribute it and/or modify it
" under the terms of the GNU General Public License as published by the Free
" Software Foundation, either version 3 of the License, or (at your option)
" any later version.
" vim-live-preview is distributed in the hope that it will be useful, but
" WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
" or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
" more details.
" You should have received a copy of the GNU General Public License along with
" vim-live-preview. If not, see <http://www.gnu.org/licenses/>.
if v:version < 700
finish
endif
" Check whether this script is already loaded
if exists("g:loaded_vim_live_preview")
finish
endif
let g:loaded_vim_live_preview = 1
" Check mkdir feature
if (!exists("*mkdir"))
echohl ErrorMsg
echo 'vim-llp: mkdir required'
echohl None
finish
endif
" Setup python
if (has('python3'))
let s:py_exe = 'python3'
elseif (has('python'))
let s:py_exe = 'python'
else
echohl ErrorMsg
echo 'vim-llp: python required'
echohl None
finish
endif
let s:saved_cpo = &cpo
set cpo&vim
let s:previewer = ''
" Run a shell command in background
function! s:RunInBackground(cmd)
execute s:py_exe "<< EEOOFF"
try:
subprocess.Popen(
vim.eval('a:cmd'),
shell = True,
universal_newlines = True,
stdout=open(os.devnull, 'w'), stderr=subprocess.STDOUT)
except:
pass
EEOOFF
endfunction
function! s:Compile()
if !exists('b:livepreview_buf_data') ||
\ has_key(b:livepreview_buf_data, 'preview_running') == 0
return
endif
" Change directory to handle properly sourced files with \input and bib
" TODO: get rid of lcd
execute 'lcd ' . b:livepreview_buf_data['root_dir']
" Write the current buffer in a temporary file
silent exec 'write! ' . b:livepreview_buf_data['tmp_src_file']
call s:RunInBackground(b:livepreview_buf_data['run_cmd'])
lcd -
endfunction
function! s:StartPreview(...)
let b:livepreview_buf_data = {}
let b:livepreview_buf_data['py_exe'] = s:py_exe
" Create a temp directory for current buffer
execute s:py_exe "<< EEOOFF"
vim.command("let b:livepreview_buf_data['tmp_dir'] = '" +
tempfile.mkdtemp(prefix="vim-latex-live-preview-") + "'")
EEOOFF
let b:livepreview_buf_data['tmp_src_file'] =
\ b:livepreview_buf_data['tmp_dir'] .
\ expand('%:p:r')
" Guess the root file which will be compiled, using first the argument
" passed, then the first line declaration of the source file and
" eventually fallback to the current file.
" TODO: emulate -parse-first-line properly
let l:root_line = substitute(getline(1),
\ '\v^\s*\%\s*!tex\s*root\s*\=\s*(.*)\s*$',
\ '\1', '')
if (a:0 > 0)
let l:root_file = fnamemodify(a:1, ':p')
elseif (l:root_line != getline(1) && strlen(l:root_line) > 0) " TODO: existence of `% !TEX` declaration condition must be cleaned...
let l:root_file = fnamemodify(l:root_line, ':p')
else
let l:root_file = b:livepreview_buf_data['tmp_src_file']
endif
" Hack for complex project trees: recreate the tree in tmp_dir
" Build tree for tmp_src_file (copy of the current buffer)
let l:tmp_src_dir = fnamemodify(b:livepreview_buf_data['tmp_src_file'], ':p:h')
if (!isdirectory(l:tmp_src_dir))
silent call mkdir(l:tmp_src_dir, 'p')
endif
" Build tree for root_file (main tex file, which might be tmp_src_file,
" ie. the current file)
if (l:root_file == b:livepreview_buf_data['tmp_src_file']) " if root file is the current file
let l:tmp_root_dir = l:tmp_src_dir
else
let l:tmp_root_dir = b:livepreview_buf_data['tmp_dir'] . fnamemodify(l:root_file, ':p:h')
if (!isdirectory(l:tmp_root_dir))
silent call mkdir(l:tmp_root_dir, 'p')
endif
endif
" Escape pathnames
let l:root_file = fnameescape(l:root_file)
let l:tmp_root_dir = fnameescape(l:tmp_root_dir)
let b:livepreview_buf_data['tmp_dir'] = fnameescape(b:livepreview_buf_data['tmp_dir'])
let b:livepreview_buf_data['tmp_src_file'] = fnameescape(b:livepreview_buf_data['tmp_src_file'])
" Change directory to handle properly sourced files with \input and bib
" TODO: get rid of lcd
if (l:root_file == b:livepreview_buf_data['tmp_src_file']) " if root file is the current file
let b:livepreview_buf_data['root_dir'] = fnameescape(expand('%:p:h'))
else
let b:livepreview_buf_data['root_dir'] = fnamemodify(l:root_file, ':p:h')
endif
execute 'lcd ' . b:livepreview_buf_data['root_dir']
" Write the current buffer in a temporary file
silent exec 'write! ' . b:livepreview_buf_data['tmp_src_file']
let l:tmp_out_file = l:tmp_root_dir . '/' .
\ fnamemodify(l:root_file, ':t:r') . '.pdf'
let b:livepreview_buf_data['run_cmd'] =
\ 'env ' .
\ 'TEXMFOUTPUT=' . l:tmp_root_dir . ' ' .
\ 'TEXINPUTS=' . l:tmp_root_dir
\ . ':' . b:livepreview_buf_data['root_dir']
\ . ': ' .
\ s:engine . ' ' .
\ '-shell-escape ' .
\ '-interaction=nonstopmode ' .
\ '-output-directory=' . l:tmp_root_dir . ' ' .
\ l:root_file
" lcd can be avoided thanks to root_dir in TEXINPUTS
silent call system(b:livepreview_buf_data['run_cmd'])
if v:shell_error != 0
echo 'Failed to compile'
lcd -
return
endif
" Enable compilation of bibliography:
let l:bib_files = split(glob(b:livepreview_buf_data['root_dir'] . '/**/*.bib')) " TODO: fails if unused bibfiles
if len(l:bib_files) > 0
for bib_file in l:bib_files
let bib_fn = fnamemodify(bib_file, ':t')
call writefile(readfile(bib_file),
\ l:tmp_root_dir . '/' . bib_fn) " TODO: may fail if same bibfile names in different dirs
endfor
" Update compile command with bibliography
let b:livepreview_buf_data['run_cmd'] =
\ 'env ' .
\ 'TEXMFOUTPUT=' . l:tmp_root_dir . ' ' .
\ 'TEXINPUTS=' . l:tmp_root_dir
\ . ':' . b:livepreview_buf_data['root_dir']
\ . ': ' .
\ 'bibtex ' . l:tmp_root_dir . '/*.aux' .
\ ' && ' .
\ b:livepreview_buf_data['run_cmd']
silent call system(b:livepreview_buf_data['run_cmd'])
endif
if v:shell_error != 0
echo 'Failed to compile bibliography'
lcd -
return
endif
call s:RunInBackground(s:previewer . ' ' . l:tmp_out_file)
lcd -
let b:livepreview_buf_data['preview_running'] = 1
endfunction
" Initialization code
function! s:Initialize()
let l:ret = 0
execute s:py_exe "<< EEOOFF"
try:
import vim
import tempfile
import subprocess
import os
except:
vim.command('let l:ret = 1')
EEOOFF
if l:ret != 0
return 'Python initialization failed.'
endif
" Get the tex engine
if exists('g:livepreview_engine')
let s:engine = g:livepreview_engine
else
for possible_engine in ['pdflatex', 'xelatex']
if executable(possible_engine)
let s:engine = possible_engine
break
endif
endfor
endif
" Get the previewer
if exists('g:livepreview_previewer')
let s:previewer = g:livepreview_previewer
else
for possible_previewer in ['evince', 'okular']
if executable(possible_previewer)
let s:previewer = possible_previewer
break
endif
endfor
endif
return 0
endfunction
let s:init_msg = s:Initialize()
if type(s:init_msg) == type('')
echohl ErrorMsg
echo 'vim-live-preview: ' . s:init_msg
echohl None
endif
unlet! s:init_msg
command! -nargs=* LLPStartPreview call s:StartPreview(<f-args>)
autocmd CursorHold,CursorHoldI,BufWritePost * call s:Compile()
let &cpo = s:saved_cpo
unlet! s:saved_cpo
" vim703: cc=80
" vim:fdm=marker et ts=4 tw=78 sw=4
|
