On 16 Jan 2014, at 21:42, Kai Wood wrote:
I need the first and last line number in a range of lines where either a blinking cursor or a selection appears in the document. Only visible selections count.
Here is a ruby function that parses the selection string syntax and maps it to a “first, last” line that is rendered selected:
def parse_selection_string(str) str.split('&').map do |range| if range =~ /(\d+)(?::(\d+))?(?:+\d+)?(?:([-x])(\d+)(?::(\d+))?(?:+\d+)?)?/ l1, l2, c1, c2 = $1.to_i, ($4 ? $4.to_i : nil), ($2 || 1).to_i, ($5 || 1).to_i l1, l2, c1, c2 = l2, l1, c2, c1 if l2 && (l1 > l2 || l1 == l2 && c2 > c1)
case $3 when 'x' [ l1, l2 ] when '-' l2 -= 1 if c2 == 1 [ l1, l2 ] else [ l1, l1 ] end else abort "unsupported selection string syntax: ‘#{range}’" end end end
You may want to post-process the result to merge overlapping ranges.