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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 08:50:31 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 08:50:31 +0000
commitaed8ce9da277f5ecffe968b324f242c41c3b752a (patch)
treed2e538394cb7a8a7c42a4aac6ccf1a8e3256999b /runtime/indent/tex.vim
parentInitial commit. (diff)
downloadvim-aed8ce9da277f5ecffe968b324f242c41c3b752a.tar.xz
vim-aed8ce9da277f5ecffe968b324f242c41c3b752a.zip
Adding upstream version 2:9.0.1378.upstream/2%9.0.1378upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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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.
+"
+" }}}
+
+" 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: