/usr/share/lilypond/2.18.2/scm/define-event-classes.scm is in lilypond-data 2.18.2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | ;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
;;;; Copyright (C) 2005--2012 Erik Sandberg <mandolaerik@gmail.com>
;;;;
;;;; LilyPond is free software: you can redistribute it and/or modify
;;;; it under the terms of the GNU General Public License as published by
;;;; the Free Software Foundation, either version 3 of the License, or
;;;; (at your option) any later version.
;;;;
;;;; LilyPond is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;;; GNU General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU General Public License
;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
(use-modules (srfi srfi-1))
;; Event class hierarchy. Each line is on the form (Parent . (List of children))
(define event-classes
'((() . (StreamEvent))
(StreamEvent .
(RemoveContext
ChangeParent Override Revert UnsetProperty SetProperty
music-event OldMusicEvent CreateContext Prepare
OneTimeStep Finish))
(music-event . (annotate-output-event
footnote-event arpeggio-event breathing-event
extender-event span-event rhythmic-event dynamic-event
break-event label-event percent-event key-change-event
string-number-event stroke-finger-event tie-event
part-combine-event part-combine-force-event
beam-forbid-event script-event tempo-change-event
tremolo-event bend-after-event fingering-event
glissando-event harmonic-event hyphen-event
laissez-vibrer-event mark-event multi-measure-text-event
note-grouping-event pes-or-flexa-event repeat-tie-event
spacing-section-event layout-instruction-event
completize-extender-event break-span-event alternative-event))
(layout-instruction-event . (apply-output-event))
(script-event . (articulation-event text-script-event))
(part-combine-event . (solo-one-event solo-two-event unisono-event))
(break-event . (line-break-event page-break-event page-turn-event))
(dynamic-event . (absolute-dynamic-event))
(span-event . (span-dynamic-event
beam-event episema-event ligature-event
measure-counter-event pedal-event
phrasing-slur-event slur-event
staff-span-event text-span-event
trill-span-event tremolo-span-event
tuplet-span-event))
(span-dynamic-event . (decrescendo-event crescendo-event))
(break-span-event . (break-dynamic-span-event))
(pedal-event . (sostenuto-event sustain-event una-corda-event))
(rhythmic-event . (lyric-event
melodic-event multi-measure-rest-event
double-percent-event percent-event
repeat-slash-event rest-event
skip-event bass-figure-event))
(melodic-event . (cluster-note-event note-event))
(() . (Announcement))
(Announcement . (AnnounceNewContext))
))
(define-public (event-class-cons class parent classlist)
(let ((lineage (assq parent classlist)))
(if (not lineage)
(begin
(if (not (null? parent))
(ly:warning (_ "unknown parent class `~a'") parent))
(set! lineage '())))
(if (symbol? class)
(acons class lineage classlist)
(fold (lambda (elt alist)
(acons elt lineage alist))
classlist class))))
(define all-event-classes
(fold (lambda (elt classlist)
(event-class-cons (cdr elt) (car elt) classlist))
'() event-classes))
;; Maps event-class to a list of ancestors (inclusive)
(define ancestor-lookup (make-hash-table (length all-event-classes)))
(define (ancestor-lookup-initialize)
(hash-clear! ancestor-lookup)
(for-each (lambda (ent) (hashq-set! ancestor-lookup (car ent) ent))
all-event-classes))
(ancestor-lookup-initialize)
(call-after-session ancestor-lookup-initialize)
;; Each class will be defined as
;; (class parent grandparent .. )
;; so that (eq? (cdr class) parent) holds.
(define-public (define-event-class class parent)
"Defines a new event @code{class} derived from @code{parent}, a
previously defined event class."
(let ((parentclass (ly:make-event-class parent)))
(cond
((ly:make-event-class class)
(ly:error (_ "Cannot redefine event class `~S'") class))
((not parentclass)
(ly:error (_ "Undefined parent event class `~S'" parentclass)))
(else
(hashq-set! ancestor-lookup
class
(cons class parentclass))))
*unspecified*))
;; TODO: Allow entering more complex classes, by taking unions.
(define-public (ly:make-event-class leaf)
(hashq-ref ancestor-lookup leaf))
(define-public (ly:in-event-class? ev cl)
"Does event @var{ev} belong to event class @var{cl}?"
(memq cl (ly:event-property ev 'class)))
;; does this exist in guile already?
(define (map-tree f t)
(cond
((list? t)
(map (lambda (x) (map-tree f x)) t))
((pair? t)
(cons (map-tree f (car t)) (map-tree f (cdr t))))
(else (f t))))
;; expand each non-leaf subtree to (root . children), recursively
(define (expand-event-tree root)
(let ((children (assq root event-classes)))
(if children
(cons root (map expand-event-tree (cdr children)))
root)))
;; produce neater representation of music event tree.
;; TODO: switch to this representation for the event-classes list?
(define music-event-tree (expand-event-tree 'music-event))
(define (sort-tree t)
(define (stringify el)
(if (symbol? el)
(symbol->string el)
(symbol->string (first el))))
(if (list? t)
(sort (map (lambda (el)
(if (list? el)
(cons (car el) (sort-tree (cdr el)))
el))
t)
(lambda (a b) (string<? (stringify a) (stringify b))))
t))
;;(use-modules (ice-9 pretty-print))
;;(pretty-print (cons (car music-event-tree) (sort-tree (cdr music-event-tree))))
(defmacro-public make-stream-event (expr)
(Stream_event::undump (primitive-eval (list 'quasiquote expr))))
(define* (simplify e)
(cond
;; Special case for lists reduces stack consumption.
((list? e) (map simplify e))
((pair? e) (cons (simplify (car e))
(simplify (cdr e))))
((ly:stream-event? e)
(list 'unquote (list 'make-stream-event (simplify (Stream_event::dump e)))))
((ly:music? e)
(list 'unquote (music->make-music e)))
((ly:moment? e)
(list 'unquote `(ly:make-moment
,(ly:moment-main-numerator e)
,(ly:moment-main-denominator e)
. ,(if (zero? (ly:moment-grace-numerator e))
'()
(list (ly:moment-grace-numerator e)
(ly:moment-grace-denominator e))))))
((ly:duration? e)
(list 'unquote `(ly:make-duration
,(ly:duration-log e)
,(ly:duration-dot-count e)
,(ly:duration-scale))))
((ly:pitch? e)
(list 'unquote `(ly:make-pitch
,(ly:pitch-octave e)
,(ly:pitch-notename e)
,(ly:pitch-alteration e))))
((ly:input-location? e)
(list 'unquote '(ly:dummy-input-location)))
(#t e)))
(define-public (ly:simplify-scheme e)
(list 'quasiquote (simplify e)))
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