142 lines
3.5 KiB
VimL
142 lines
3.5 KiB
VimL
" vimtex - LaTeX plugin for Vim
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"
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" Maintainer: Karl Yngve Lervåg
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" Email: karl.yngve@gmail.com
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"
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if exists('b:did_indent')
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finish
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endif
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let b:did_indent = 1
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let b:did_vimtex_indent = 1
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call vimtex#util#set_default('g:vimtex_indent_enabled', 1)
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if !g:vimtex_indent_enabled | finish | endif
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let s:cpo_save = &cpo
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set cpo&vim
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setlocal autoindent
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setlocal indentexpr=VimtexIndent()
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setlocal indentkeys&
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setlocal indentkeys+=[,(,{,),},],\&,=item
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function! VimtexIndent() " {{{1
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" Find a non-blank non-comment line above the current line
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let l:nprev = prevnonblank(v:lnum - 1)
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while l:nprev != 0 && getline(l:nprev) =~# '^\s*%'
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let l:nprev = prevnonblank(l:nprev - 1)
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endwhile
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if l:nprev == 0
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return 0
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endif
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" Get current and previous line and remove comments
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let l:cur = substitute(getline(v:lnum), '\\\@<!%.*', '', '')
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let l:prev = substitute(getline(l:nprev), '\\\@<!%.*', '', '')
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" Check for verbatim modes
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if synIDattr(synID(v:lnum, indent(v:lnum), 1), 'name') ==# 'texZone'
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return empty(l:cur) ? indent(l:nprev) : indent(v:lnum)
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endif
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" Align on ampersands
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if l:cur =~# '^\s*&' && l:prev =~# '\\\@<!&.*'
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return indent(v:lnum) + match(l:prev, '\\\@<!&') - stridx(l:cur, '&')
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endif
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" Use previous indentation for comments
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if l:cur =~# '^\s*%'
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return indent(v:lnum)
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endif
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" Find previous non-empty non-comment non-ampersand line
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while l:nprev != 0 && (match(l:prev, '\\\@<!&') != -1 || l:prev =~# '^\s*%')
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let l:nprev = prevnonblank(l:nprev - 1)
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let l:prev = getline(l:nprev)
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endwhile
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if l:nprev == 0
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return 0
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endif
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let l:ind = indent(l:nprev)
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" Add indent on begin environment
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if l:prev =~# '\\begin{.*}' && l:prev !~ s:envs_noindent
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let l:ind = l:ind + &sw
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" Add extra indent for list environments
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if l:prev =~ s:envs_lists
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let l:ind = l:ind + &sw
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endif
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endif
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" Subtract indent on end environment
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if l:cur =~# '\\end{.*}' && l:cur !~ s:envs_noindent
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let l:ind = l:ind - &sw
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" Subtract extra indent for list environments
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if l:cur =~ s:envs_lists
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let l:ind = l:ind - &sw
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endif
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endif
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" Indent opening and closing delimiters
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let [l:re_open, l:re_close] = vimtex#delim#get_valid_regexps(v:lnum, col('.'))
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let l:ind += &sw*(
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\ max([s:count(l:prev, l:re_open) - s:count(l:prev, l:re_close), 0])
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\ - max([s:count(l:cur, l:re_close) - s:count(l:cur, l:re_open), 0]))
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" Indent list items
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if l:prev =~# '^\s*\\\(bib\)\?item'
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let l:ind += &sw
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endif
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if l:cur =~# '^\s*\\\(bib\)\?item'
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let l:ind -= &sw
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endif
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" Indent tikz elements
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if l:prev =~# s:tikz_commands && l:prev !~# ';'
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let l:ind += &sw
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elseif l:prev !~# s:tikz_commands && l:prev =~# ';'
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let l:ind -= &sw
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endif
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return l:ind
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endfunction
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"}}}
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function! s:count(line, pattern) " {{{1
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let sum = 0
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let indx = match(a:line, a:pattern)
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while indx >= 0
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let sum += 1
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let match = matchstr(a:line, a:pattern, indx)
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let indx += len(match)
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let indx = match(a:line, a:pattern, indx)
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endwhile
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return sum
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endfunction
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" }}}1
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" {{{1 Script variables
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" Define some common patterns
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let s:envs_lists = 'itemize\|description\|enumerate\|thebibliography'
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let s:envs_noindent = 'document\|verbatim\|lstlisting'
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let s:tikz_commands = '\v\\%(' . join([
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\ 'draw',
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\ 'fill',
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\ 'path',
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\ 'node',
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\ 'coordinate',
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\ 'add%(legendentry|plot)',
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\ ], '|') . ')'
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" }}}1
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let &cpo = s:cpo_save
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unlet s:cpo_save
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" vim: fdm=marker sw=2
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