1 ;;;; This file is part of LilyPond, the GNU music typesetter.
3 ;;;; Copyright (C) 2013--2015 Mike Solomon <mike@mikesolomon.org>
5 ;;;; LilyPond is free software: you can redistribute it and/or modify
6 ;;;; it under the terms of the GNU General Public License as published by
7 ;;;; the Free Software Foundation, either version 3 of the License, or
8 ;;;; (at your option) any later version.
10 ;;;; LilyPond is distributed in the hope that it will be useful,
11 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 ;;;; GNU General Public License for more details.
15 ;;;; You should have received a copy of the GNU General Public License
16 ;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
18 (define-public (skyline-pair::empty? skyp)
19 (and (ly:skyline-empty? (ly:skyline-pair::skyline skyp UP))
20 (ly:skyline-empty? (ly:skyline-pair::skyline skyp DOWN))))
22 ;; checks if the pair is not null, and then if not empty
23 (define-public (skyline-pair-and-non-empty? skyp)
24 (and (ly:skyline-pair? skyp)
25 (not (skyline-pair::empty? skyp))))