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Ingo Karkat
44 lines
1.4 KiB
VimL
44 lines
1.4 KiB
VimL
" ingo/range/borders.vim: Functions for determining ranges at the borders of the buffer.
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"
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" DEPENDENCIES:
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"
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" Copyright: (C) 2016 Ingo Karkat
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" The VIM LICENSE applies to this script; see ':help copyright'.
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"
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" Maintainer: Ingo Karkat <ingo@karkat.de>
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"
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" REVISION DATE REMARKS
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" 001 13-Jul-2016 file creation
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function! ingo#range#borders#StartAndEndRange( startOffset, endOffset )
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"******************************************************************************
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"* PURPOSE:
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" Determine non-overlapping range(s) for a:startOffset lines from the start of
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" the current buffer, and a:endOffset lines from the end of the current
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" buffer.
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"* ASSUMPTIONS / PRECONDITIONS:
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" None.
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"* EFFECTS / POSTCONDITIONS:
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" None.
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"* INPUTS:
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" a:startOffset Number of lines to get from the start.
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" a:endOffset Number of lines to get from the end.
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"* RETURN VALUES:
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" List of ranges, in the form ['1,3', '8,$']
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"******************************************************************************
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let l:ranges = []
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let l:lastStartLnum = min([line('$'), a:startOffset])
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if a:startOffset > 0
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call add(l:ranges, '1,' . l:lastStartLnum)
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endif
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let l:firstEndLnum = max([1, line('$') - a:endOffset + 1])
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let l:firstEndLnum = max([l:lastStartLnum + 1, l:firstEndLnum])
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if l:firstEndLnum <= line('$')
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call add(l:ranges, l:firstEndLnum . ',$')
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endif
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return l:ranges
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endfunction
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" vim: set ts=8 sts=4 sw=4 noexpandtab ff=unix fdm=syntax :
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