96 lines
2.8 KiB
VimL
96 lines
2.8 KiB
VimL
" Vim indent file
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" Language: SDL
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" Maintainer: Michael Piefel <entwurf@piefel.de>
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" Last Change: 2021 Oct 03
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" Shamelessly stolen from the Vim-Script indent file
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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=GetSDLIndent()
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setlocal indentkeys+==~end,=~state,*<Return>
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let b:undo_indent = "setl inde< indk<"
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" Only define the function once.
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if exists("*GetSDLIndent")
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" finish
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endif
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let s:cpo_save = &cpo
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set cpo&vim
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function! GetSDLIndent()
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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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let ind = indent(lnum)
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let virtuality = '^\s*\(\(virtual\|redefined\|finalized\)\s\+\)\=\s*'
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" Add a single space to comments which use asterisks
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if getline(lnum) =~ '^\s*\*'
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let ind = ind - 1
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endif
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if getline(v:lnum) =~ '^\s*\*'
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let ind = ind + 1
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endif
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" Add a 'shiftwidth' after states, different blocks, decision (and alternatives), inputs
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if (getline(lnum) =~? '^\s*\(start\|state\|system\|package\|connection\|channel\|alternative\|macro\|operator\|newtype\|select\|substructure\|decision\|generator\|refinement\|service\|method\|exceptionhandler\|asntype\|syntype\|value\|(.*):\|\(priority\s\+\)\=input\|provided\)'
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\ || getline(lnum) =~? virtuality . '\(process\|procedure\|block\|object\)')
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\ && getline(lnum) !~? 'end[[:alpha:]]\+;$'
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let ind = ind + shiftwidth()
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endif
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" Subtract a 'shiftwidth' after states
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if getline(lnum) =~? '^\s*\(stop\|return\>\|nextstate\)'
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let ind = ind - shiftwidth()
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endif
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" Subtract a 'shiftwidth' on on end (uncompleted line)
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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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" Put each alternatives where the corresponding decision was
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if getline(v:lnum) =~? '^\s*\((.*)\|else\):'
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normal k
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let ind = indent(searchpair('^\s*decision', '', '^\s*enddecision', 'bW',
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\ 'synIDattr(synID(line("."), col("."), 0), "name") =~? "sdlString"'))
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endif
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" Put each state where the preceding state was
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if getline(v:lnum) =~? '^\s*state\>'
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let ind = indent(search('^\s*start', 'bW'))
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endif
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" Systems and packages are always in column 0
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if getline(v:lnum) =~? '^\s*\(\(end\)\=system\|\(end\)\=package\)'
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return 0
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endif
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" Put each end* where the corresponding begin was
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if getline(v:lnum) =~? '^\s*end[[:alpha:]]'
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normal k
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let partner=matchstr(getline(v:lnum), '\(' . virtuality . 'end\)\@<=[[:alpha:]]\+')
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let ind = indent(searchpair(virtuality . partner, '', '^\s*end' . partner, 'bW',
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\ 'synIDattr(synID(line("."), col("."), 0), "name") =~? "sdlString"'))
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endif
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return ind
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endfunction
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let &cpo = s:cpo_save
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unlet s:cpo_save
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" vim:sw=2
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