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116 lines
3.2 KiB
VimL
116 lines
3.2 KiB
VimL
" Vim indent file
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" Language: Eiffel
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" Maintainer: Jocelyn Fiat <jfiat@eiffel.com>
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" Previous-Maintainer: David Clarke <gadicath@dishevelled.net>
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" Contributions from: Takuya Fujiwara
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" Contributions from: Thilo Six
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" $Date: 2017/03/08 06:00:00 $
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" $Revision: 1.4 $
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" URL: https://github.com/eiffelhub/vim-eiffel
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" Only load this indent file when no other was loaded.
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if exists("b:did_indent")
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finish
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endif
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let b:did_indent = 1
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setlocal indentexpr=GetEiffelIndent()
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setlocal nolisp
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setlocal nosmartindent
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setlocal nocindent
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setlocal autoindent
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setlocal comments=:--
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setlocal indentkeys+==end,=else,=ensure,=require,=check,=loop,=until
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setlocal indentkeys+==creation,=feature,=inherit,=class,=is,=redefine,=rename,=variant
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setlocal indentkeys+==invariant,=do,=local,=export
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let b:undo_indent = "setl smartindent< indentkeys< indentexpr< autoindent< comments< "
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" Define some stuff
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" keywords grouped by indenting
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let s:trust_user_indent = '\(+\)\(\s*\(--\).*\)\=$'
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let s:relative_indent = '^\s*\(deferred\|class\|feature\|creation\|inherit\|loop\|from\|across\|until\|if\|else\|elseif\|ensure\|require\|check\|do\|local\|invariant\|variant\|rename\|redefine\|do\|export\)\>'
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let s:outdent = '^\s*\(else\|invariant\|variant\|do\|require\|until\|loop\|local\)\>'
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let s:no_indent = '^\s*\(class\|feature\|creation\|inherit\)\>'
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let s:single_dent = '^[^-]\+[[:alnum:]]\+ is\(\s*\(--\).*\)\=$'
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let s:inheritance_dent = '\s*\(redefine\|rename\|export\)\>'
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" Only define the function once.
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if exists("*GetEiffelIndent")
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finish
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endif
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let s:keepcpo= &cpo
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set cpo&vim
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function GetEiffelIndent()
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" Eiffel Class indenting
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"
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" Find a non-blank line above the current line.
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let lnum = prevnonblank(v:lnum - 1)
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" At the start of the file use zero indent.
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if lnum == 0
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return 0
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endif
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" trust the user's indenting
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if getline(lnum) =~ s:trust_user_indent
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return -1
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endif
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" Add a 'shiftwidth' after lines that start with an indent word
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let ind = indent(lnum)
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if getline(lnum) =~ s:relative_indent
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let ind = ind + shiftwidth()
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endif
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" Indent to single indent
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if getline(v:lnum) =~ s:single_dent && getline(v:lnum) !~ s:relative_indent
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\ && getline(v:lnum) !~ '\s*\<\(and\|or\|implies\)\>'
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let ind = shiftwidth()
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endif
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" Indent to double indent
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if getline(v:lnum) =~ s:inheritance_dent
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let ind = 2 * shiftwidth()
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endif
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" Indent line after the first line of the function definition
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if getline(lnum) =~ s:single_dent
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let ind = ind + shiftwidth()
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endif
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" The following should always be at the start of a line, no indenting
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if getline(v:lnum) =~ s:no_indent
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let ind = 0
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endif
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" Subtract a 'shiftwidth', if this isn't the first thing after the 'is'
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" or first thing after the 'do'
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if getline(v:lnum) =~ s:outdent && getline(v:lnum - 1) !~ s:single_dent
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\ && getline(v:lnum - 1) !~ '^\s*do\>'
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let ind = ind - shiftwidth()
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endif
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" Subtract a shiftwidth for end statements
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if getline(v:lnum) =~ '^\s*end\>'
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let ind = ind - shiftwidth()
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endif
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" set indent of zero end statements that are at an indent of 3, this should
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" only ever be the class's end.
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if getline(v:lnum) =~ '^\s*end\>' && ind == shiftwidth()
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let ind = 0
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endif
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return ind
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endfunction
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let &cpo = s:keepcpo
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unlet s:keepcpo
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" vim:sw=2
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