1 ;;;; define-context-properties.scm -- part of backend documentation
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 1998--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
6 ;;;; Jan Nieuwenhuizen <janneke@gnu.org>
9 (define-public all-translation-properties '())
11 (define (translator-property-description symbol type? description)
12 (if (not (equal? #f (object-property symbol 'translation-doc)))
14 (ly:warn "Redefining ~S " symbol)
17 (set-object-property! symbol 'translation-type? type?)
18 (set-object-property! symbol 'translation-doc description)
19 (set! all-translation-properties (cons symbol all-translation-properties))
22 (define-public all-user-translation-properties
25 (apply translator-property-description x))
27 (aDueText ,string? "Text to print at a unisono passage.")
28 (alignBassFigureAccidentals ,boolean?
29 "If true, then the accidentals are aligned in bass figure context.")
31 (allowBeamBreak ,boolean? "If true allow line breaks for beams over bar lines.")
32 (associatedVoice ,string? "Name of the
33 @code{Voice} that has the melody for this @code{Lyrics} line.")
34 (autoBeamSettings ,list? "Specifies
35 when automatically generated beams should begin and end.
36 See @usermanref{Setting automatic beam behavior} for more information.
38 (autoAccidentals ,list? "List of
39 different ways to typeset an accidental.
41 For determining when to print an accidental, several different rules
42 are tried. The rule that gives the highest number of accidentals is
43 used. Each rule consists of
48 In which context is the rule applied. For example, if
49 @var{context} is @internalsref{Score} then all staves share
50 accidentals, and if @var{context} is @internalsref{Staff} then all
51 voices in the same staff share accidentals, but staves do not.
54 Whether the accidental changes all octaves or only the current
55 octave. Valid choices are
59 This is the default algorithm. Accidentals are typeset if the note changes
60 the accidental of that note in that octave. Accidentals lasts to the end of the measure
61 and then as many measures as specified in the value. I.e. 1 means to the end
62 of next measure, -1 means to the end of previous measure (that is: no duration at all), etc. #t means forever.
64 Accidentals are typeset if the note is different from
65 the previous note on the same pitch in any octave. The value has same meaning as in
71 Over how many bar lines the accidental lasts.
72 If @var{laziness} is @code{-1} then the accidental is forgotten
73 immediately, and if @var{laziness} is @code{#t} then the accidental
77 (autoBeaming ,boolean? "If set to true then beams are generated
80 (autoCautionaries ,list? "List similar to
81 @code{autoAccidentals}, but it controls cautionary accidentals rather than
82 normal ones. Both lists are tried, and the one giving the most accidentals
83 wins. In case of draw, a normal accidental is typeset.
85 (automaticBars ,boolean? " If set to true then bar lines will not be
86 printed automatically; they must be explicitly created with
87 @code{\\bar} command. Unlike the @code{\\cadenza} keyword, measures
88 are still counted. Bar generation will resume according to that count
89 if this property is unset.
92 (barAlways ,boolean? "If set to true a bar line is drawn after each
95 (barCheckSynchronize ,boolean? "If true then reset @code{measurePosition}
96 when finding a barcheck.")
98 (barNumberVisibility ,procedure? "Procedure that takes an int and
99 returns whether the corresponding bar number should be printed")
100 (bassStaffProperties ,list? "Alist of property settings to apply
101 for the down staff of PianoStaff. Used by @code{\\autochange}")
102 (trebleStaffProperties ,list? "Alist of property settings to apply
103 for the up staff of PianoStaff. Used by @code{\\autochange}")
104 (bassFigureFormatFunction ,procedure? "Procedure that is called
105 to produce the formatting for a @code{BassFigure} grob. It takes a
106 list of @code{BassFigureEvent}s, a context, and the grob to format.")
107 (beatLength ,ly:moment? "The length of one beat in this time signature.")
109 "List of beatgroups, e.g., in 5/8 time @code{'(2
114 (middleCPosition ,number? "Place of the middle C, measured in half
115 staffspaces. Usually determined by looking at @code{clefPosition} and
118 (chordNameFunction ,procedure?
119 "The function that converts lists of pitches to chord names.")
120 (chordNoteNamer ,procedure?
121 "Function that converts from a pitch object to a text markup. Used for single pitches.")
122 (chordRootNamer ,procedure?
123 "Function that converts from a pitch object to a text markup. Used for chords.")
124 (chordNameExceptions ,list?
125 "An alist of chord exceptions.
126 Contains (@var{chord} . @var{markup}) entries.")
127 (chordNameExceptionsFull ,list?
128 "An alist of chord exceptions.
129 Contains (@var{chord} . @var{markup}) entries.")
130 (chordNameExceptionsPartial
132 "An alist of partial chord exceptions. Contains (@var{chord} . (@var{prefix-markup} @var{suffix-markup})) entries.")
134 (chordNameSeparator ,markup?
135 "The markup object used to separate
136 parts of a chord name.")
137 (chordChanges ,boolean? "Only show changes in chords scheme?")
138 (clefGlyph ,string? "Name of the symbol within the music font.")
139 (clefOctavation ,integer? "Add
140 this much extra octavation. Values of 7 and -7 are common.")
142 (clefPosition ,number? "Where should the center of the clef
143 symbol go, measured in half staff spaces from the center of the staff.")
145 (connectArpeggios ,boolean? " If set, connect arpeggios across
147 (createKeyOnClefChange ,boolean? "Print a key signature whenever the clef is changed.")
148 (createSpacing ,boolean? "Create @code{StaffSpacing} objects?
149 Should be set for staves.")
150 (crescendoText ,markup? "Text to print at start of non-hairpin crescendo, i.e.: @samp{cresc.}")
151 (crescendoSpanner ,symbol? "Type of spanner to be used for crescendi.
152 One of: @samp{hairpin}, @samp{line}, @samp{dashed-line},
153 @samp{dotted-line}. If unset, hairpin type is used.")
154 (decrescendoText ,markup? "Text to print at start of non-hairpin decrescendo, i.e.: @samp{dim.}")
156 (drumPitchTable ,hash-table? "A table mapping percussion
157 instruments (symbols) to pitches.")
159 (drumStyleTable ,hash-table? "A hash table containing mapping
160 drums to layout settings. Predefined values: @samp{drums-style},
161 @samp{timbales-style}, @samp{congas-style}, @samp{bongos-style} and
162 @samp{percussion-style}.
164 The layout style is a hash table, containing the drum-pitches (e.g. the
165 symbol @samp{hihat}) as key, and a list (@var{notehead-style}
166 @var{script} @var{vertical-position}) as values.
168 (currentBarNumber ,integer? "Contains the current barnumber. This property is incremented at
171 (defaultBarType ,string? "Sets the default type of bar line.
172 See @code{whichBar} for information on available bar types.
174 This variable is read by @internalsref{Timing_engraver} at
175 @internalsref{Score} level.
178 (decrescendoSpanner ,symbol? "See @code{crescendoSpanner}.")
179 (doubleSlurs ,boolean?
180 "When set, two slurs are created for every slurred
181 note, one above and one below the chord.")
182 (explicitClefVisibility ,procedure? "@samp{break-visibility} function for clef changes.")
184 (explicitKeySignatureVisibility ,procedure?
185 "@samp{break-visibility} function for explicit key
186 changes. @samp{\\override} of the @code{break-visibility} property will set the
187 visibility for normal (i.e. at the start of the line) key signatures.")
189 (extraNatural ,boolean? "Whether to typeset an
190 extra natural sign before accidentals changing from a non-natural to
191 another non-natural.")
193 (extraVerticalExtent ,number-pair?
194 "extra vertical extent, same format as @var{minimumVerticalExtent}")
197 (followVoice ,boolean? "If set, note heads are tracked across staff
198 switches by a thin line")
201 "The relative size of all grobs in a context. ")
203 (fingeringOrientations ,list?
204 "List of symbols, containing
205 @samp{left}, @samp{right}, @samp{up} and/or @samp{down}. This list
206 determines where fingerings are put relative to the chord being
209 (forceClef ,boolean? "Show clef symbol, even if it has not
210 changed. Only active for the first clef after the property is set, not
211 for the full staff.")
213 (harmonicAccidentals ,boolean? "If set, harmonic notes in chords
215 (highStringOne ,boolean? "Whether the 1st string is the string with
216 highest pitch on the instrument. This used by the automatic string
217 selector for tab notation.")
219 (ignoreMelismata ,boolean? "Ignore melismata for this @internalsref{Lyrics} line.")
220 (instr ,markup? "See @code{instrument}")
222 (instrument ,markup? "The name to print left of a staff. The
223 @code{instrument} property labels the staff in the first system, and
224 the @code{instr} property labels following lines.")
225 (instrumentEqualizer ,procedure? "
226 Function taking a string (instrument name), and returning a (@var{min} . @var{max}) pair of numbers for the loudness range of the instrument.
228 (instrumentTransposition ,ly:pitch? "Defines the transposition of
229 the instrument. Its value is the pitch that sounds like middle C. This
230 is used to transpose the MIDI output, and @code{\\quote}s.")
232 (keyAccidentalOrder ,list? " Alist that defines in what order
233 alterations should be printed. The format is (@var{name}
234 . @var{alter}), where @var{name} is from 0 .. 6 and @var{alter} from
235 -2 (sharp) and 2 (flat).
238 (keySignature ,list? "The current key signature. This is an alist
239 containing (@var{name} . @var{alter}) or ((@var{octave} . @var{name}) . @var{alter}).
240 where @var{name} is from 0.. 6 and
241 @var{alter} from -4 (double flat) to 4 (double sharp).
244 (majorSevenSymbol ,markup? "How should
245 the major 7th be formatted in a chord name?")
246 (markFormatter ,procedure? "Procedure
247 taking as arguments context and rehearsal mark. It should return the
248 formatted mark as a markup object.")
250 (measureLength ,ly:moment? "Length of one
251 measure in the current time signature.")
253 (measurePosition ,ly:moment? "How much of the current measure
254 have we had. This can be set manually to create incomplete
257 (melismaBusyProperties ,list? "List of properties (symbols) to
258 determine whether a melisma is playing. Setting this property will
259 influence how lyrics are aligned to notes. For example, if set to
260 @code{#'(melismaBusy beamMelismaBusy)}, only manual melismata and
261 manual beams are considered. Possible values include
262 @code{melismaBusy}, @code{slurMelismaBusy}, @code{tieMelismaBusy}, and
263 @code{beamMelismaBusy}")
266 (metronomeMarkFormatter ,procedure? "How to produce a metronome
267 markup. Called with 2 arguments, event and context.")
268 (midiInstrument ,string? "Name of the MIDI instrument to use ")
269 (midiMinimumVolume ,number? "Sets the minimum loudness for MIDI. Ranges from 0 to 1.")
270 (midiMaximumVolume ,number? "Analogous to @code{midiMinimumVolume}.")
271 (minimumFret ,number? "The tablature auto string-selecting mechanism
272 selects the highest string with a fret at least @code{minimumFret}")
273 (minimumVerticalExtent ,number-pair? "minimum vertical extent, same
274 format as @var{verticalExtent}")
275 (ottavation ,string? "If set, the text for an ottava spanner. Changing
276 this creates a new text spanner. ")
277 (pedalSustainStrings ,list? "List of string to print for
278 sustain-pedal. Format is (@var{up} @var{updown} @var{down}), where
279 each of the three is the string to print when this is done with the
281 (pedalUnaCordaStrings ,list? "See @code{pedalSustainStrings}.")
282 (pedalSostenutoStrings ,list? "See @code{pedalSustainStrings}.")
283 (pedalSustainStyle ,symbol? "A symbol that indicates how to print
284 sustain pedals: @code{text}, @code{bracket} or @code{mixed} (both).")
285 (pedalUnaCordaStyle ,symbol? "see @code{pedalSustainStyle}.")
286 (pedalSostenutoStyle ,symbol? "see @code{pedalSustainStyle}.")
287 (printKeyCancellation ,boolean? "Print restoration alterations before a key signature change. ")
288 (printPartCombineTexts ,boolean? "set Solo/A due texts in the part combiner?")
289 (printOctaveNames ,boolean? "Print octave marks for the NoteNames context.")
290 (recordEventSequence ,procedure? "When
291 @internalsref{Recording_group_engraver} is in this context, then upon
292 termination of the context, this function is called with current
293 context and a list of music objects. The list of contains entries
294 with start times, music objects and whether they are processed in this
298 (rehearsalMark ,integer? "The last rehearsal mark printed.")
299 (repeatCommands ,list? "This property is read to find any command of the form @code{(volta . @var{x})}, where @var{x} is a string or @code{#f}")
300 (restNumberThreshold ,number?
301 "If a multimeasure rest has more measures
302 than this, a number is printed. ")
303 (shapeNoteStyles ,vector? "Vector of symbols, listing style for each note
304 head relative to the tonic (qv.) of the scale.")
305 (skipBars ,boolean? "If set to true, then
306 skip the empty bars that are produced by multimeasure notes and rests.
307 These bars will not appear on the printed output. If not set (the
308 default) multimeasure notes and rests expand into their full length,
309 printing the appropriate number of empty bars so that synchronization
310 with other voices is preserved.
314 @@lilypond[fragment,verbatim,center]
315 r1 r1*3 R1*3 \\\\property Score.skipBars= ##t r1*3 R1*3
319 (skipTypesetting ,boolean?
320 "When true, all no typesetting is done, speeding
321 up the interpretation phase. This speeds up debugging large scores.")
322 (soloIIText ,string? "text for begin of solo for voice ``two'' when part-combining.")
323 (soloText ,string? "text for begin of solo when part-combining.")
324 (squashedPosition ,integer? " Vertical position of
325 squashing for @internalsref{Pitch_squash_engraver}.")
327 (stringOneTopmost ,boolean? "Whether the 1st string is printed on the
328 top line of the tablature.")
330 (stanza ,markup? "Stanza `number' to print before the start of a
331 verse. Use in Lyrics context.")
333 (stemLeftBeamCount ,integer? " Specify the number of beams to draw on
334 the left side of the next note. Overrides automatic beaming. The
335 value is only used once, and then it is erased.")
337 (stemRightBeamCount ,integer? "See @code{stemLeftBeamCount}.")
339 (stringTunings ,list? "The tablature strings tuning. It is a list
340 of the pitch (in semitones) of each string (starting with the lower
343 (subdivideBeams ,boolean? "If set, multiple beams will be subdivided
344 at beat positions by only drawing one beam over the beat.")
346 (systemStartDelimiter ,symbol? "Which grob to make for the start of
347 the system/staff? Set to @code{SystemStartBrace},
348 @code{SystemStartBracket} or @code{SystemStartBar}.")
350 (tablatureFormat ,procedure? "Function formatting a tab note head; it
351 takes a string number, a list of string tunings and Pitch object. It
352 returns the text as a string.")
354 (timeSignatureFraction ,number-pair?
355 "pair of numbers, signifying the time
356 signature. For example @code{#'(4 . 4)} is a 4/4 time signature.")
358 (timing ,boolean? " Keep administration of measure length, position, bar number, etc?
359 Switch off for cadenzas.")
361 "The tonic of the current scale")
363 (tremoloFlags ,integer? "Number of tremolo flags to add if no
364 number is specified.")
366 (tupletNumberFormatFunction
368 "Function taking a music as input, producing a string. This function
369 is called to determine the text to print on a tuplet bracket.")
371 (tupletSpannerDuration ,ly:moment? "
372 Normally a tuplet bracket is as wide as the
373 @code{\\times} expression that gave rise to it. By setting this
374 property, you can make brackets last shorter. Example
377 @@lilypond[verbatim,fragment]
378 context Voice \\times 2/3 @{
379 property Voice.tupletSpannerDuration = #(ly:make-moment 1 4)
385 (verticalAlignmentChildCallback ,procedure? "What callback to add
386 to children of a vertical alignment. It determines what
387 procedure is used on the alignment itself.")
388 (verticalExtent ,number-pair? "Hard coded vertical extent. The format
389 is a pair of dimensions, for example, this sets the sizes of a staff
390 to 10 (5+5) staffspaces high.
393 \\set Staff.verticalExtent = #'(-5.0 . 5.0)
397 This does not work for Voice or any other context that doesn't form a
400 (verticallySpacedContexts ,list? "List of symbols, containing
401 context names whose vertical axis groups should be taken into account for
402 vertical spacing of systems.")
404 (vocalName ,markup? "Name of a vocal line.")
405 (vocNam ,markup? "Name of a vocal line, short version.")
407 (voltaOnThisStaff ,boolean?
408 "Normally, volta brackets are put only on the
409 topmost staff. This variable overrides this behavior, when set to
410 @code{#t} or @code{#f}.")
412 (voltaSpannerDuration ,ly:moment? "This specifies the maximum duration
413 to use for the brackets printed for @code{\\alternative}. This can be
414 used to shrink the length of brackets in the situation where one
415 alternative is very large.")
419 "This property is read to determine what type of bar line to create.
423 \\set Staff.whichBar = \"|:\"
426 This will create a start-repeat bar in this staff only.
427 Valid values are described in @internalsref{bar-line-interface}.
431 (define-public all-internal-translation-properties
434 (set-object-property! (car x) 'internal-translation #t)
435 (apply translator-property-description x)
439 `((slurMelismaBusy ,boolean? "Signal if a slur is present.")
440 (originalCentralCPosition
442 "Used for temporary overriding middle C in octavation brackets. ")
443 (melismaBusy ,boolean? "Signifies
444 whether a melisma is active. This can be used to signal melismas on
445 top of those automatically detected. ")
446 (graceSettings ,list?
447 "Overrides for grace notes. This property should
448 be manipulated through the @code{add-grace-property} function.")
449 (currentCommandColumn ,ly:grob? "Grob that is X-parent to all
450 current breakable (clef, key signature, etc.) items.")
451 (currentMusicalColumn ,ly:grob? "Grob that is X-parent to all
452 non-breakable items (note heads, lyrics, etc.).")
453 (breakableSeparationItem ,ly:grob?
454 "The breakable items in this time step,
457 (localKeySignature ,list? "the key signature at this point in the
458 measure. The format is the same as for keySignature, but can also
459 contain ((@var{octave} . @var{name}) . (@var{alter} . @var{barnumber}))
460 pairs. It is reset at every bar line.")
463 (localKeySignatureChanges ,list? "Experimental. [DOCME]")
465 (finalizations ,list? "List of expressions to evaluate before proceeding to next time step. Internal variable.")
466 (busyGrobs ,list? "a queue of (@var{end-moment} . @var{GROB})
467 conses. This is for internal (C++) use only. This property contains
468 the grobs which are still busy (e.g. note heads, spanners, etc.)
470 (barCheckLastFail ,ly:moment? "Where in the measure did the last barcheck fail?")
471 (associatedVoiceContext ,ly:context? "The context object of the Voice that has the melody for this Lyrics.")
472 (acceptHashTable ,vector? "Internal
473 variable: store table with MusicName to Engraver entries.")
474 (acknowledgeHashTable ,vector?
475 "Internal variable: store interface to engraver smob table for current
478 (beamMelismaBusy ,boolean? "Signal if a beam is present.")
479 (dynamicAbsoluteVolumeFunction ,procedure? "[DOCUMENT-ME]")
481 (lastKeySignature ,list? "Last key signature before a key
484 (scriptDefinitions ,list? "Description of scripts. This is used by
485 Script_engraver for typesetting note-super/subscripts. See
486 @file{scm/script.scm} for more information
488 (quotedEventTypes ,list? "List of symbols, representing the
489 event types that should be duplicated for @code{\\quote} commands.")
491 ; (quotes ,hash-table? "Hash table, mapping names to music-event vectors.")
492 (stavesFound ,grob-list? "list of all staff-symbols found.")
493 (instrumentSupport ,grob-list? "list of grobs to attach instrument name
495 (tieMelismaBusy ,boolean? "Signal whether a tie is present.")
496 (tweakCount ,number? "Number of otherwise unique Contexts.")
497 (tweakRank ,number? "Identify otherwise unique Contexts.")
500 (define-public all-translation-properties
501 (append all-user-translation-properties
502 all-internal-translation-properties))
504 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
506 (define-public default-melisma-properties '(melismaBusy slurMelismaBusy tieMelismaBusy beamMelismaBusy))