Update

1 files changed, 140 insertions, 0 deletions

diff --git a/indent/tex.vim b/indent/tex.vim
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index 00000000..14af7b28
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+++ b/indent/tex.vim
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+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'latex') == -1
+  
+" LaTeX indent file (part of LaTeX Box)
+" Maintainer: David Munger (mungerd@gmail.com)
+
+if exists("g:LatexBox_custom_indent") && ! g:LatexBox_custom_indent
+	finish
+endif
+if exists("b:did_indent")
+	finish
+endif
+
+let b:did_indent = 1
+
+setlocal indentexpr=LatexBox_TexIndent()
+setlocal indentkeys=0=\\end,0=\\end{enumerate},0=\\end{itemize},0=\\end{description},0=\\right,0=\\item,0=\\),0=\\],0},o,O,0\\
+
+let s:list_envs = ['itemize', 'enumerate', 'description']
+" indent on \left( and on \(, but not on (
+" indent on \left[ and on \[, but not on [
+" indent on \left\{ and on {, but not on \{
+let s:open_pat = '\\\@<!\%(\\begin\|\\left\a\@!\|\\(\|\\\[\|{\)'
+let s:close_pat = '\\\@<!\%(\\end\|\\right\a\@!\|\\)\|\\\]\|}\)'
+let s:list_open_pat = '\\\@<!\\begin{\%(' . join(s:list_envs, '\|') . '\)}'
+let s:list_close_pat	= '\\\@<!\\end{\%(' . join(s:list_envs, '\|') . '\)}'
+
+function! s:CountMatches(str, pat)
+	return len(substitute(substitute(a:str, a:pat, "\n", 'g'), "[^\n]", '', 'g'))
+endfunction
+
+
+" TexIndent {{{
+function! LatexBox_TexIndent()
+
+	let lnum_curr = v:lnum
+	let lnum_prev = prevnonblank(lnum_curr - 1)
+
+	if lnum_prev == 0
+		return 0
+	endif
+
+	let line_curr = getline(lnum_curr)
+	let line_prev = getline(lnum_prev)
+
+	" remove \\
+	let line_curr = substitute(line_curr, '\\\\', '', 'g')
+	let line_prev = substitute(line_prev, '\\\\', '', 'g')
+
+	" strip comments
+	let line_curr = substitute(line_curr, '\\\@<!%.*$', '', 'g')
+	let line_prev = substitute(line_prev, '\\\@<!%.*$', '', 'g')
+
+	" find unmatched opening patterns on previous line
+	let n = s:CountMatches(line_prev, s:open_pat)-s:CountMatches(line_prev, s:close_pat)
+	let n += s:CountMatches(line_prev, s:list_open_pat)-s:CountMatches(line_prev, s:list_close_pat)
+
+	" reduce indentation if current line starts with a closing pattern
+	if line_curr =~ '^\s*\%(' . s:close_pat . '\)'
+		let n -= 1
+	endif
+
+	" compensate indentation if previous line starts with a closing pattern
+	if line_prev =~ '^\s*\%(' . s:close_pat . '\)'
+		let n += 1
+	endif
+
+	" reduce indentation if current line starts with a closing list
+	if line_curr =~ '^\s*\%(' . s:list_close_pat . '\)'
+		let n -= 1
+	endif
+
+	" compensate indentation if previous line starts with a closing list
+	if line_prev =~ '^\s*\%(' . s:list_close_pat . '\)'
+		let n += 1
+	endif
+
+	" reduce indentation if previous line is \begin{document}
+	if line_prev =~ '\\begin\s*{document}'
+		let n -= 1
+	endif
+
+	" less shift for lines starting with \item
+	let item_here =  line_curr =~ '^\s*\\item'
+	let item_above = line_prev =~ '^\s*\\item'
+	if !item_here && item_above
+		let n += 1
+	elseif item_here && !item_above
+		let n -= 1
+	endif
+
+	return indent(lnum_prev) + n * &sw
+endfunction
+" }}}
+
+" Restore cursor position, window position, and last search after running a
+" command.
+function! Latexbox_CallIndent()
+  " Save the current cursor position.
+  let cursor = getpos('.')
+
+  " Save the current window position.
+  normal! H
+  let window = getpos('.')
+  call setpos('.', cursor)
+
+  " Get first non-whitespace character of current line.
+  let line_start_char = matchstr(getline('.'), '\S')
+
+  " Get initial tab position.
+  let initial_tab = stridx(getline('.'), line_start_char)
+
+  " Execute the command.
+  execute 'normal! =='
+
+  " Get tab position difference.
+  let difference = stridx(getline('.'), line_start_char) - initial_tab
+
+  " Set new cursor Y position based on calculated difference.
+  let cursor[2] = cursor[2] + difference
+
+  " Restore the previous window position.
+  call setpos('.', window)
+  normal! zt
+
+  " Restore the previous cursor position.
+  call setpos('.', cursor)
+endfunction
+
+" autocmd to call indent after completion
+" 7.3.598
+if v:version > 703 || (v:version == 703 && has('patch598'))
+	augroup LatexBox_Completion
+		autocmd!
+		autocmd CompleteDone <buffer> call Latexbox_CallIndent()
+	augroup END
+endif
+
+" vim:fdm=marker:ff=unix:noet:ts=4:sw=4
+
+endif