" Vim indent file
" Language: LaTeX
" Maintainer: Johannes Tanzler <johannes.tanzler@gmail.com>
" Version: 0.5
" Created: Sat, 16 Feb 2002 16:50:19 +0100
" Last Change: Mar, 27 Jun 2011 11:46:35 +0200
" Last Update: 18th feb 2002, by LH :
" (*) better support for the option
" (*) use some regex instead of several '||'.
" Oct 9th, 2003, by JT:
" (*) don't change indentation of lines starting with '%'
" 2005/06/15, Moshe Kaminsky <kaminsky@math.huji.ac.il>
" (*) New variables:
" g:tex_items, g:tex_itemize_env, g:tex_noindent_env
" 2011/3/6, by Zhou Yi Chao <broken.zhou@gmail.com>
" (*) Don't change indentation of lines starting with '%'
" I don't see any code with '%' and it doesn't work properly
" so I add some code.
" (*) New features: Add smartindent-like indent
" for "{}" and "[]".
" (*) New variables: g:tex_indent_brace
"
" Options: {{{
"
" To set the following options (ok, currently it's just one), add a line like
" let g:tex_indent_items = 1
" to your ~/.vimrc.
"
" * g:tex_indent_brace
"
" If this variable is unset or non-zero, it will use smartindent-like style
" for "{}" and "[]"
"
" * g:tex_indent_items
"
" If this variable is set, item-environments are indented like Emacs does
" it, i.e., continuation lines are indented with a shiftwidth.
"
" NOTE: I've already set the variable below; delete the corresponding line
" if you don't like this behaviour.
"
" Per default, it is unset.
"
" set unset
" ----------------------------------------------------------------
" \begin{itemize} \begin{itemize}
" \item blablabla \item blablabla
" bla bla bla bla bla bla
" \item blablabla \item blablabla
" bla bla bla bla bla bla
" \end{itemize} \end{itemize}
"
"
" * g:tex_items
"
" A list of tokens to be considered as commands for the beginning of an item
" command. The tokens should be separated with '\|'. The initial '\' should
" be escaped. The default is '\\bibitem\|\\item'.
"
" * g:tex_itemize_env
"
" A list of environment names, separated with '\|', where the items (item
" commands matching g:tex_items) may appear. The default is
" 'itemize\|description\|enumerate\|thebibliography'.
"
" * g:tex_noindent_env
"
" A list of environment names. separated with '\|', where no indentation is
" required. The default is 'document\|verbatim\|comment\|lstlisting'.
"
" }}}
"
" License: {{{
" Copyright (c) 2002-2011 Johannes Tanzler <johannes.tanzler@gmail.com>
" Permission is hereby granted, free of charge, to any person obtaining
" a copy of this software and associated documentation files (the
" "Software"), to deal in the Software without restriction, including
" without limitation the rights to use, copy, modify, merge, publish,
" distribute, sublicense, and/or sell copies of the Software, and to
" permit persons to whom the Software is furnished to do so, subject to
" the following conditions:
"
" The above copyright notice and this permission notice shall be included
" in all copies or substantial portions of the Software.
"
" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
" IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
" CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
" TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
" SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
" }}}
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
" Delete the next line to avoid the special indention of items
if !exists("g:tex_indent_items")
let g:tex_indent_items = 1
endif
if !exists("g:tex_indent_brace")
let g:tex_indent_brace = 1
endif
if g:tex_indent_items
if !exists("g:tex_itemize_env")
let g:tex_itemize_env = 'itemize\|description\|enumerate\|thebibliography'
endif
if !exists('g:tex_items')
let g:tex_items = '\\bibitem\|\\item'
endif
else
let g:tex_items = ''
endif
if !exists("g:tex_noindent_env")
let g:tex_noindent_env = 'document\|verbatim\|comment\|lstlisting'
endif
setlocal autoindent
setlocal nosmartindent
setlocal indentexpr=GetTeXIndent()
exec 'setlocal indentkeys+=},]' . substitute(g:tex_items, '^\|\(\\|\)', ',=', 'g')
let g:tex_items = '^\s*' . g:tex_items
" Only define the function once
if exists("*GetTeXIndent") | finish
endif
function GetTeXIndent()
" Find a non-blank line above the current line.
let lnum = prevnonblank(v:lnum - 1)
" New code for comments: Comments is not what we need.
while lnum != 0
if getline(lnum) !~ '^\s*%'
break
endif
let lnum = prevnonblank(lnum - 1)
endwhile
" At the start of the file use zero indent.
if lnum == 0 | return 0
endif
let ind = indent(lnum)
let line = getline(lnum) " last line
let cline = getline(v:lnum) " current line
" New code for comment: retain the indent of current line
if cline =~ '^\s*%'
return indent(v:lnum)
endif
" Add a 'shiftwidth' after beginning of environments.
" Don't add it for environments identified by
" g:tex_noindent_env
" LH modification : \begin does not always start a line
let current_regexp = '\\begin'
while 1
let match_list = matchlist(line, current_regexp.'\s*{\(.*\)}')
if (empty(match_list))
break
endif
let environment_type = get(match_list, 1)
if environment_type !~ g:tex_noindent_env
let ind = ind + &sw
if g:tex_indent_items == 1
" Add another sw for item-environments
if line =~ g:tex_itemize_env
let ind = ind + &sw
endif
endif
endif
" Make the regexp match the following begin
let current_regexp = current_regexp.'.*\\begin'
endwhile
" Subtract a 'shiftwidth' when an environment ends
if cline =~ '^\s*\\end' && cline !~ g:tex_noindent_env
if g:tex_indent_items == 1
" Remove another sw for item-environments
if cline =~ g:tex_itemize_env
let ind = ind - &sw
endif
endif
let ind = ind - &sw
endif
" Subtract a 'shiftwidth' when an environment ended
" the previous line but the shiftwidth wasn't
" applied because it didn't begin the line
let current_regexp = '\\end'
while 1
let match_list = matchlist(line, current_regexp.'\s*{\(.*\)}')
if (empty(match_list))
break
endif
let environment_type = get(match_list, 1)
if environment_type !~ g:tex_noindent_env
\ && (current_regexp != '\\end' || line !~ '^\s*\\end')
" If the end begin the line, the shift width has already
" been subtracted at the previous line
let ind = ind - &sw
if g:tex_indent_items == 1
" Add another sw for item-environments
if line =~ g:tex_itemize_env
let ind = ind - &sw
endif
endif
endif
" Make the regexp match the following end
let current_regexp = current_regexp.'.*\\end'
endwhile
if g:tex_indent_brace
" Add a 'shiftwidth' after a "{" or "[" while there are not "}" and "]"
" after them. \m for magic
if line =~ '\m\(\(\[[^\]]*\)\|\({[^}]*\)\)$'
let ind = ind + &sw
endif
" Remove a 'shiftwidth' after a "}" or "]" while there are not "{" and "["
" before them. \m for magic
if cline =~ '\m^\(\([^[]*\]\)\|\([^{]*}\)\)'
let ind = ind - &sw
endif
endif
" Special treatment for 'item'
" ----------------------------
if g:tex_indent_items
" '\item' or '\bibitem' itself:
if cline =~ g:tex_items
let ind = ind - &sw
endif
" lines following to '\item' are intented once again:
if line =~ g:tex_items
let ind = ind + &sw
endif
endif
return ind
endfunction
" vim: set sw=4 textwidth=78:
