;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
-;;;; Copyright (C) 2006--2011 Han-Wen Nienhuys <hanwen@lilypond.org>
+;;;; Copyright (C) 2006--2012 Han-Wen Nienhuys <hanwen@lilypond.org>
;;;;
;;;; LilyPond is free software: you can redistribute it and/or modify
;;;; it under the terms of the GNU General Public License as published by
;;
;;
;; (define-public (make-rhythmic-location bar-num num den)
-;: (define-public (rhythmic-location? a)
+;; (define-public (rhythmic-location? a)
;; (define-public (make-graceless-rhythmic-location loc)
;; (define-public rhythmic-location-measure-position cdr)
;; (define-public rhythmic-location-bar-number car)
;; (define-public (rhythmic-location<? a b)
-;: (define-public (rhythmic-location<=? a b)
-;: (define-public (rhythmic-location>=? a b)
+;; (define-public (rhythmic-location<=? a b)
+;; (define-public (rhythmic-location>=? a b)
;; (define-public (rhythmic-location>? a b)
-;: (define-public (rhythmic-location=? a b)
+;; (define-public (rhythmic-location=? a b)
;; (define-public (rhythmic-location->file-string a)
;; (define-public (rhythmic-location->string a)
;;
;; the total of this will be
;; O(#systems * #regions)
-;;
+;;
;; we can actually do better by sorting the regions as well,
;; but let's leave that for future extensions.
;;
(define-public (system-clipped-x-extent system-grob clip-region)
- "Return the X-extent of the SYSTEM-GROB when clipped with
-CLIP-REGION. Return #f if not appropriate."
-
+ "Return the X-extent of @var{system-grob} when clipped with
+@var{clip-region}. Return @code{#f} if not appropriate."
+
(let*
((region-start (car clip-region))
(columns (ly:grob-object system-grob 'columns))
(region-end (cdr clip-region))
(found-grace-end #f)
- (candidate-columns
+ (candidate-columns
(filter
(lambda (j)
(let*
(loc (ly:grob-property column 'rhythmic-location))
(grace-less (make-graceless-rhythmic-location loc))
)
-
+
(and (rhythmic-location? loc)
(rhythmic-location<=? region-start loc)
(or (rhythmic-location<? grace-less region-end)
)))
))
-
+
(iota (ly:grob-array-length columns))))
-
+
(column-range
(if (>= 1 (length candidate-columns))
#f
system-grob
(ly:grob-array-ref columns (car column-range)))
system-grob X))
-
+
(interval-end
(ly:grob-robust-relative-extent
(if (= (1- (ly:grob-array-length columns)) (cdr column-range))
system-grob
(ly:grob-array-ref columns (cdr column-range)))
system-grob X)))
-
-
+
+
#f
)))
-
+
clipped-x-interval))