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Diffstat (limited to 'runtime/indent/tex.vim')
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diff --git a/runtime/indent/tex.vim b/runtime/indent/tex.vim new file mode 100644 index 0000000..d356ba9 --- /dev/null +++ b/runtime/indent/tex.vim @@ -0,0 +1,423 @@ +" 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. +" +" }}} + +" 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, '^\(\^\\s\*\)*', '', '') +" }}} + +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: |