1 %% DO NOT EDIT this file manually; it is automatically
2 %% generated from LSR http://lsr.dsi.unimi.it
3 %% Make any changes in LSR itself, or in Documentation/snippets/new/ ,
4 %% and then run scripts/auxiliar/makelsr.py
6 %% This file is in the public domain.
10 lsrtags = "automatic-notation, scheme-language, really-cool"
12 %% Translation of GIT committish: 57f9346bb030f49336a858fcbf1519366fe56454
14 Une partition LilyPond, de manière interne, n'est rien d'autre qu'une
15 expression Scheme générée par l'analyseur syntaxique de lilypond. Il
16 est donc possible, à l'aide de Scheme, de générer automatiquement une
17 partition sans fichier source. Une expression musicale en Scheme sera
18 transformée en partition par un appel à
19 @code{(scorify-music music parser)}. Ceci aura pour effet de générer
20 un objet @code{score} auquel sera appliqué un bloc @code{layout}
21 comportant la fonction
24 (let* ((layout (ly:output-def-clone $defaultlayout)))
25 ; modification de la mise en forme, puis assignation :
26 (ly:score-add-output-def! score layout)
30 Il suffit alors de transmettre ce @code{score} à lilypond pour qu'il le
31 grave. Les trois fonctions -- @code{(add-score parser score)},
32 @code{(add-text parser text)} et @code{(add-music parser music)} --
33 définies dans le code ci-dessous permettent de transmettre à lilypond,
34 aux fins de les graver, une partition complète, un @emph{markup} ou
35 simplement de la musique.
37 Cet exemple permet aussi de graver les pièces contenues dans un bloc
38 @code{\\book@{@dots{}@}} ainsi que des partitions de niveau supérieur.
39 Chaque partition destinée à être gravée est alors ajoutée à la liste des
40 partitions de niveau supérieur ; le @code{toplevel-book-handler} --
41 fonction Scheme appelée pour traiter un @emph{book} dès que le bloc
42 @code{\\book@{@dots{}@}} est clôturé -- s'adapte pour prendre en charge
43 tous les @code{score} jusque là collectés dans l'ouvrage.
46 doctitlefr = "Génération en Scheme de partitions complètes (y compris des parties d'ouvrage) sans utiliser l'analyseur"
49 A lilypond score internally is just a Scheme expression, generated by
50 the lilypond parser. Using scheme, one can also automatically generate
51 a score without an input file. If you have the music expression in
52 scheme, a score can be generated by simply calling (scorify-music music
53 parser) on your music. This will generate a score object, for which you
54 can then set a custom layout block with (let* ((layout
55 (ly:output-def-clone $defaultlayout)))
56 ; modify the layout here, then assign it:
57 (ly:score-add-output-def! score layout)
61 Finally, all you have to do it to pass this score to lilypond for
62 typesetting. This snippet defines functions @code{(add-score parser
63 score)}, @code{(add-text parser text)} and @code{(add-music parser
64 music)} to pass a complete score, some markup or some music to lilypond
67 This snippet also works for typesetting scores inside a @code{\\book
68 @{...@}} block, as well as top-level scores. To achieve this, each
69 score schedulled for typesetting is appended to the list of toplevel
70 scores and the toplevel-book-handler (which is a scheme function called
71 to process a book once a @code{\\book@{..@}} block is closed) is
72 modified to inser all collected scores so far to the book.
75 doctitle = "Generating whole scores (also book parts) in scheme without using the parser"
78 #(define-public (add-score parser score)
79 (ly:parser-define! parser 'toplevel-scores
80 (cons score (ly:parser-lookup parser 'toplevel-scores))))
82 #(define-public (add-text parser text)
83 (add-score parser (list text)))
85 #(define-public (add-music parser music)
86 (collect-music-aux (lambda (score)
87 (add-score parser score))
91 #(define-public (toplevel-book-handler parser book)
93 (ly:book-add-score! book score))
94 (reverse! (ly:parser-lookup parser 'toplevel-scores)))
95 (ly:parser-define! parser 'toplevel-scores (list))
96 (print-book-with-defaults parser book))
98 #(define-public (book-score-handler book score)
99 (add-score parser score))
101 #(define-public (book-text-handler book text)
102 (add-text parser text))
104 #(define-public (book-music-handler parser book music)
105 (add-music parser music))
110 %% Just some example score to show how to use these functions:
111 #(define add-one-note-score #f)
113 (set! add-one-note-score
115 (let* ((music (make-music 'EventChord
116 'elements (list (make-music 'NoteEvent
117 'duration (ly:make-duration 2 0 1 1)
118 'pitch (ly:make-pitch 0 pitch 0)))))
119 (score (scorify-music music parser))
120 (layout (ly:output-def-clone $defaultlayout))
121 (note-name (case pitch
130 (title (markup #:large #:line ("Score with a" note-name))))
131 (ly:score-add-output-def! score layout)
132 (add-text parser title)
133 (add-score parser score))
134 (set! pitch (modulo (1+ pitch) 7)))))
137 #(define-music-function (parser location) ()
138 (add-one-note-score parser)
139 (make-music 'Music 'void #t))
153 % Top-level scores are also handled correctly