153 lines
4.4 KiB
VimL
153 lines
4.4 KiB
VimL
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" vim: set sw=4 sts=4 et ft=vim :
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" Script: securemodelines.vim
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" Author: Ciaran McCreesh <ciaran.mccreesh at googlemail.com>
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" Homepage: http://github.com/ciaranm/securemodelines
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" Requires: Vim 7
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" License: Redistribute under the same terms as Vim itself
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" Purpose: A secure alternative to modelines
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if &compatible || v:version < 700 || exists('g:loaded_securemodelines')
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finish
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endif
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let g:loaded_securemodelines = 1
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if (! exists("g:secure_modelines_allowed_items"))
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let g:secure_modelines_allowed_items = [
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\ "textwidth", "tw",
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\ "softtabstop", "sts",
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\ "tabstop", "ts",
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\ "shiftwidth", "sw",
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\ "expandtab", "et", "noexpandtab", "noet",
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\ "filetype", "ft",
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\ "foldmethod", "fdm",
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\ "readonly", "ro", "noreadonly", "noro",
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\ "rightleft", "rl", "norightleft", "norl",
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\ "cindent", "cin", "nocindent", "nocin",
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\ "smartindent", "si", "nosmartindent", "nosi",
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\ "autoindent", "ai", "noautoindent", "noai",
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\ "spell",
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\ "spelllang"
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\ ]
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endif
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if (! exists("g:secure_modelines_verbose"))
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let g:secure_modelines_verbose = 0
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endif
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if (! exists("g:secure_modelines_modelines"))
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let g:secure_modelines_modelines=5
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endif
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if (! exists("g:secure_modelines_leave_modeline"))
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if &modeline
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set nomodeline
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if g:secure_modelines_verbose
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echohl WarningMsg
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echo "Forcibly disabling internal modelines for securemodelines.vim"
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echohl None
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endif
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endif
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endif
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fun! <SID>IsInList(list, i) abort
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for l:item in a:list
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if a:i == l:item
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return 1
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endif
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endfor
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return 0
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endfun
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fun! <SID>DoOne(item) abort
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let l:matches = matchlist(a:item, '^\([a-z]\+\)\%([-+^]\?=[a-zA-Z0-9_\-.]\+\)\?$')
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if len(l:matches) > 0
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if <SID>IsInList(g:secure_modelines_allowed_items, l:matches[1])
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exec "setlocal " . a:item
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elseif g:secure_modelines_verbose
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echohl WarningMsg
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echo "Ignoring '" . a:item . "' in modeline"
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echohl None
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endif
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endif
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endfun
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fun! <SID>DoNoSetModeline(line) abort
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for l:item in split(a:line, '[ \t:]')
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call <SID>DoOne(l:item)
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endfor
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endfun
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fun! <SID>DoSetModeline(line) abort
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for l:item in split(a:line)
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call <SID>DoOne(l:item)
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endfor
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endfun
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fun! <SID>CheckVersion(op, ver) abort
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if a:op == "="
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return v:version != a:ver
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elseif a:op == "<"
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return v:version < a:ver
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elseif a:op == ">"
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return v:version >= a:ver
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else
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return 0
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endif
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endfun
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fun! <SID>DoModeline(line) abort
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let l:matches = matchlist(a:line, '\%(\S\@<!\%(vi\|vim\([<>=]\?\)\([0-9]\+\)\?\)\|\sex\):\s*\%(set\s\+\)\?\([^:]\+\):\S\@!')
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if len(l:matches) > 0
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let l:operator = ">"
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if len(l:matches[1]) > 0
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let l:operator = l:matches[1]
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endif
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if len(l:matches[2]) > 0
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if <SID>CheckVersion(l:operator, l:matches[2]) ? 0 : 1
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return
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endif
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endif
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return <SID>DoSetModeline(l:matches[3])
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endif
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let l:matches = matchlist(a:line, '\%(\S\@<!\%(vi\|vim\([<>=]\?\)\([0-9]\+\)\?\)\|\sex\):\(.\+\)')
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if len(l:matches) > 0
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let l:operator = ">"
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if len(l:matches[1]) > 0
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let l:operator = l:matches[1]
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endif
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if len(l:matches[2]) > 0
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if <SID>CheckVersion(l:operator, l:matches[2]) ? 0 : 1
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return
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endif
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endif
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return <SID>DoNoSetModeline(l:matches[3])
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endif
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endfun
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fun! <SID>DoModelines() abort
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if line("$") > g:secure_modelines_modelines
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let l:lines={ }
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call map(filter(getline(1, g:secure_modelines_modelines) +
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\ getline(line("$") - g:secure_modelines_modelines, "$"),
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\ 'v:val =~ ":"'), 'extend(l:lines, { v:val : 0 } )')
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for l:line in keys(l:lines)
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call <SID>DoModeline(l:line)
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endfor
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else
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for l:line in getline(1, "$")
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call <SID>DoModeline(l:line)
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endfor
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endif
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endfun
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fun! SecureModelines_DoModelines() abort
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call <SID>DoModelines()
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endfun
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aug SecureModeLines
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au!
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au BufRead,StdinReadPost * :call <SID>DoModelines()
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aug END
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