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" Vim indent file " Language: LaTeX " Maintainer: Yichao Zhou <broken.zhou AT gmail.com> " Created: Sat, 16 Feb 2002 16:50:19 +0100 " Version: 1.0.0 " Please email me if you found something I can do. Comments, bug report and " feature request are welcome. " 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 AT math.huji.ac.il> " (*) New variables: " g:tex_items, g:tex_itemize_env, g:tex_noindent_env " 2011/3/6, by Yichao Zhou <broken.zhou AT 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 Yichao Zhou <broken.zhou AT gmail.com> " (*) Bug fix: smartindent-like indent for "[]" " (*) New features: Align with "&". " (*) New variable: g:tex_indent_and. " 2011/10/23 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Bug fix: improve the smartindent-like indent for "{}" and " "[]". " 2012/02/27 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Bug fix: support default folding marker. " (*) Indent with "&" is not very handy. Make it not enable by " default. " 2012/03/06 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Modify "&" behavior and make it default again. Now "&" " won't align when there are more then one "&" in the previous " line. " (*) Add indent "\left(" and "\right)" " (*) Trust user when in "verbatim" and "lstlisting" " 2012/03/11 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Modify "&" so that only indent when current line start with " "&". " 2012/03/12 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Modify indentkeys. " 2012/03/18 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Add &cpo " 2013/05/02 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Fix problem about GetTeXIndent checker. Thank Albert Netymk " for reporting this. " 2014/06/23 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Remove the feature g:tex_indent_and because it is buggy. " (*) If there is not any obvious indentation hints, we do not " alert our user's current indentation. " (*) g:tex_indent_brace now only works if the open brace is the " last character of that line. " 2014/08/03 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Indent current line if last line has larger indentation " 2016/11/08 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Fix problems for \[ and \]. Thanks Bruno for reporting. " 2017/04/30 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Fix a bug between g:tex_noindent_env and g:tex_indent_items " Now g:tex_noindent_env='document\|verbatim\|itemize' (Emacs " style) is supported. Thanks Miles Wheeler for reporting. " 2018/02/07 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Make indentation more smart in the normal mode " 2020/04/26 by Yichao Zhou <broken.zhou AT gmail.com> " (*) Fix a bug related to \[ & \]. Thanks Manuel Boni for " reporting. " 2023/08/28 by Vim Project " (*) Set b:undo_indent. " }}} " Document: {{{ " " For proper latex experience, please put " let g:tex_flavor = "latex" " into your vimrc. " " * g:tex_indent_brace " " If this variable is unset or non-zero, it will use smartindent-like style " for "{}" and "[]". Now this only works if the open brace is the last " character of that line. " " % Example 1 " \usetikzlibrary{ " external " } " " % Example 2 " \tikzexternalize[ " prefix=tikz] " " * 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. " " 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'. " }}} " Only define the function once if exists("b:did_indent") finish endif let s:cpo_save = &cpo set cpo&vim " Define global variable {{{ let b:did_indent = 1 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_max_scan_line") let g:tex_max_scan_line = 60 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 "}}} " VIM Setting " {{{ setlocal autoindent setlocal nosmartindent setlocal indentexpr=GetTeXIndent() setlocal indentkeys& exec 'setlocal indentkeys+=[,(,{,),},],\&' . substitute(g:tex_items, '^\|$\\|$', ',=', 'g') let g:tex_items = '^\s*' . substitute(g:tex_items, '^$\^\\s\*$*', '', '') let b:undo_indent = "setlocal autoindent< indentexpr< indentkeys< smartindent<" " }}} function! GetTeXIndent() " {{{ " Find a non-blank line above the current line. let lnum = prevnonblank(v:lnum - 1) let cnum = v:lnum " 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 = substitute(getline(lnum), '\s*%.*', '','g') " last line let cline = substitute(getline(v:lnum), '\s*%.*', '', 'g') " current line let ccol = 1 while cline[ccol] =~ '\s' let ccol += 1 endwhile " We are in verbatim, so do what our user what. if synIDattr(synID(v:lnum, ccol, 1), "name") == "texZone" if empty(cline) return indent(lnum) else return indent(v:lnum) endif endif if lnum == 0 return 0 endif let ind = indent(lnum) let stay = 1 " 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{.*}' if line !~ g:tex_noindent_env let ind = ind + shiftwidth() let stay = 0 endif if g:tex_indent_items " Add another sw for item-environments if line =~ g:tex_itemize_env let ind = ind + shiftwidth() let stay = 0 endif endif endif if cline =~ '\\end{.*}' let retn = s:GetEndIndentation(v:lnum) if retn != -1 return retn endif end " Subtract a 'shiftwidth' when an environment ends if cline =~ '\\end{.*}' \ && cline !~ g:tex_noindent_env \ && cline !~ '\\begin{.*}.*\\end{.*}' if g:tex_indent_items " Remove another sw for item-environments if cline =~ g:tex_itemize_env let ind = ind - shiftwidth() let stay = 0 endif endif let ind = ind - shiftwidth() let stay = 0 endif if g:tex_indent_brace if line =~ '[[{]$' let ind += shiftwidth() let stay = 0 endif if cline =~ '^\s*\\\?[\]}]' && s:CheckPairedIsLastCharacter(v:lnum, ccol) let ind -= shiftwidth() let stay = 0 endif if line !~ '^\s*\\\?[\]}]' for i in range(1, strlen(line)-1) let char = line[i] if char == ']' || char == '}' if s:CheckPairedIsLastCharacter(lnum, i) let ind -= shiftwidth() let stay = 0 endif endif endfor endif endif " Special treatment for 'item' " ---------------------------- if g:tex_indent_items " '\item' or '\bibitem' itself: if cline =~ g:tex_items let ind = ind - shiftwidth() let stay = 0 endif " lines following to '\item' are indented once again: if line =~ g:tex_items let ind = ind + shiftwidth() let stay = 0 endif endif if stay && mode() == 'i' " If there is no obvious indentation hint, and indentation is triggered " in insert mode, we trust our user. if empty(cline) return ind else return max([indent(v:lnum), s:GetLastBeginIndentation(v:lnum)]) endif else return ind endif endfunction "}}} function! s:GetLastBeginIndentation(lnum) " {{{ let matchend = 1 for lnum in range(a:lnum-1, max([a:lnum - g:tex_max_scan_line, 1]), -1) let line = getline(lnum) if line =~ '\\end{.*}' let matchend += 1 endif if line =~ '\\begin{.*}' let matchend -= 1 endif if matchend == 0 if line =~ g:tex_noindent_env return indent(lnum) endif if line =~ g:tex_itemize_env return indent(lnum) + 2 * shiftwidth() endif return indent(lnum) + shiftwidth() endif endfor return -1 endfunction function! s:GetEndIndentation(lnum) " {{{ if getline(a:lnum) =~ '\\begin{.*}.*\\end{.*}' return -1 endif let min_indent = 100 let matchend = 1 for lnum in range(a:lnum-1, max([a:lnum-g:tex_max_scan_line, 1]), -1) let line = getline(lnum) if line =~ '\\end{.*}' let matchend += 1 endif if line =~ '\\begin{.*}' let matchend -= 1 endif if matchend == 0 return indent(lnum) endif if !empty(line) let min_indent = min([min_indent, indent(lnum)]) endif endfor return min_indent - shiftwidth() endfunction " Most of the code is from matchparen.vim function! s:CheckPairedIsLastCharacter(lnum, col) "{{{ let c_lnum = a:lnum let c_col = a:col+1 let line = getline(c_lnum) if line[c_col-1] == '\' let c_col = c_col + 1 endif let c = line[c_col-1] let plist = split(&matchpairs, '.\zs[:,]') let i = index(plist, c) if i < 0 return 0 endif " Figure out the arguments for searchpairpos(). if i % 2 == 0 let s_flags = 'nW' let c2 = plist[i + 1] else let s_flags = 'nbW' let c2 = c let c = plist[i - 1] endif if c == '[' let c = '\[' let c2 = '\]' endif " Find the match. When it was just before the cursor move it there for a " moment. let save_cursor = winsaveview() call cursor(c_lnum, c_col) " When not in a string or comment ignore matches inside them. " We match "escape" for special items, such as lispEscapeSpecial. let s_skip ='synIDattr(synID(line("."), col("."), 0), "name") ' . \ '=~? "string\\|character\\|singlequote\\|escape\\|comment"' execute 'if' s_skip '| let s_skip = 0 | endif' let stopline = max([0, c_lnum - g:tex_max_scan_line]) " Limit the search time to 300 msec to avoid a hang on very long lines. " This fails when a timeout is not supported. try let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline, 100) catch /E118/ endtry call winrestview(save_cursor) if m_lnum > 0 let line = getline(m_lnum) return strlen(line) == m_col endif return 0 endfunction "}}} let &cpo = s:cpo_save unlet s:cpo_save " vim: set sw=4 textwidth=80: