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" Vim indent file
" Language: LaTeX
" Maintainer: Zhou YiChao <broken.zhou@gmail.com>
" Created: Sat, 16 Feb 2002 16:50:19 +0100
" Last Change: Tue, 25 Sep 2011
" Last Update: 25th Sep 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 YiChao <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
" 2011/9/25, by Zhou Yichao <broken.zhou@gmail.com>
" (*) Bug fix: smartindent-like indent for "[]"
" (*) New features: Align with "&".
" (*) New variable: g:tex_indent_and
" 2011/10/23 by Zhou Yichao <broken.zhou@gmail.com>
" (*) Bug fix: improve the smartindent-like indent for "{}" and
" "[]".
"
" Version: 0.62
" 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'.
"
" * g:tex_indent_and
"
" If this variable is unset or zero, vim will try to align the line with first
" "&". This is pretty useful when you use environment like table or align.
" Note that this feature need to search back some line, so vim may become
" a little slow.
"
" }}}
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 !exists("g:tex_indent_and")
let g:tex_indent_and = 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\|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)
" Comment line is not what we need.
while lnum != 0 && getline(lnum) =~ '^\s*%'
let lnum = prevnonblank(lnum - 1)
endwhile
" At the start of the file use zero indent.
if lnum == 0
return 0
endif
let line = getline(lnum) " last line
let cline = getline(v:lnum) " current line
" You want to align with "&"
if g:tex_indent_and
" Align with last line if last line has a "&"
if stridx(cline, "&") != -1 && stridx(line, "&") != -1
return indent(v:lnum) + stridx(line, "&") - stridx(cline, "&")
endif
" set line & lnum to the line which doesn't contain "&"
while lnum != 0 && (stridx(line, "&") != -1 || line =~ '^\s*%')
let lnum = prevnonblank(lnum - 1)
let line = getline(lnum)
endwhile
endif
if lnum == 0
return 0
endif
let ind = indent(lnum)
" 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 \begin{document} and \begin{verbatim}
""if line =~ '^\s*\\begin{\(.*\)}' && line !~ 'verbatim'
" LH modification : \begin does not always start a line
" ZYC modification : \end after \begin won't cause wrong indent anymore
if line =~ '\\begin{.*}' && line !~ g:tex_noindent_env
\ && line !~ '\\begin{.\{-}}.*\\end{.*}'
let ind = ind + &sw
if g:tex_indent_items
" Add another sw for item-environments
if line =~ g:tex_itemize_env
let ind = ind + &sw
endif
endif
endif
" Subtract a 'shiftwidth' when an environment ends
if cline =~ '^\s*\\end' && cline !~ g:tex_noindent_env
if g:tex_indent_items
" Remove another sw for item-environments
if cline =~ g:tex_itemize_env
let ind = ind - &sw
endif
endif
let ind = ind - &sw
endif
if g:tex_indent_brace
" Add a 'shiftwidth' after a "{" or "[".
let sum1 = 0
for i in range(0, strlen(line)-1)
if line[i] == "}" || line[i] == "]"
let sum1 = max([0, sum1-1])
endif
if line[i] == "{" || line[i] == "["
let sum1 += 1
endif
endfor
let sum2 = 0
for i in reverse(range(0, strlen(cline)-1))
if cline[i] == "{" || cline[i] == "["
let sum2 = max([0, sum2-1])
endif
if cline[i] == "}" || cline[i] == "]"
let sum2 += 1
endif
endfor
let ind += (sum1 - sum2) * &sw
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=80:
|
