1 ;;;; define-context-properties.scm -- part of backend documentation
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 1998--2005 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)))
13 (ly:error (_ "symbol ~S redefined" symbol)))
15 (set-object-property! symbol 'translation-type? type?)
16 (set-object-property! symbol 'translation-doc description)
17 (set! all-translation-properties (cons symbol all-translation-properties))
20 (define-public all-user-translation-properties
23 (apply translator-property-description x))
25 (aDueText ,string? "Text to print at a unisono passage.")
26 (alignBelowContext ,string? "Where to insert newly created context in vertiical alignment.")
27 (alignAboveContext ,string? "Where to insert newly created context in vertiical alignment.")
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 (autoBeamCheck ,procedure? "Procedure taking three
78 arguments, CONTEXT, DIR start/stop (-1 or 1) and TEST shortest
79 note in the beam. A non-#f return value starts or stops the auto beam.")
80 (autoBeaming ,boolean? "If set to true then beams are generated
83 (autoCautionaries ,list? "List similar to
84 @code{autoAccidentals}, but it controls cautionary accidentals rather than
85 normal ones. Both lists are tried, and the one giving the most accidentals
86 wins. In case of draw, a normal accidental is typeset.
88 (automaticBars ,boolean? " If set to true then bar lines will not be
89 printed automatically; they must be explicitly created with
90 @code{\\bar} command. Unlike the @code{\\cadenza} keyword, measures
91 are still counted. Bar generation will resume according to that count
92 if this property is unset.
95 (barAlways ,boolean? "If set to true a bar line is drawn after each
98 (barCheckSynchronize ,boolean? "If true then reset @code{measurePosition}
99 when finding a barcheck.")
101 (barNumberVisibility ,procedure? "Procedure that takes an int and
102 returns whether the corresponding bar number should be printed")
103 (bassStaffProperties ,list? "Alist of property settings to apply
104 for the down staff of PianoStaff. Used by @code{\\autochange}")
105 (trebleStaffProperties ,list? "Alist of property settings to apply
106 for the up staff of PianoStaff. Used by @code{\\autochange}")
107 (bassFigureFormatFunction ,procedure? "Procedure that is called
108 to produce the formatting for a @code{BassFigure} grob. It takes a
109 list of @code{BassFigureEvent}s, a context, and the grob to format.")
110 (beatLength ,ly:moment? "The length of one beat in this time signature.")
112 "List of beatgroups, e.g., in 5/8 time @code{'(2
117 (middleCPosition ,number? "Place of the middle C, measured in half
118 staffspaces. Usually determined by looking at @code{clefPosition} and
121 (chordNameFunction ,procedure?
122 "The function that converts lists of pitches to chord names.")
123 (chordNoteNamer ,procedure?
124 "Function that converts from a pitch object to a text markup. Used for single pitches.")
125 (chordRootNamer ,procedure?
126 "Function that converts from a pitch object to a text markup. Used for chords.")
127 (chordNameExceptions ,list?
128 "An alist of chord exceptions.
129 Contains (@var{chord} . @var{markup}) entries.")
130 (chordNameExceptionsFull ,list?
131 "An alist of chord exceptions.
132 Contains (@var{chord} . @var{markup}) entries.")
133 (chordNameExceptionsPartial
135 "An alist of partial chord exceptions. Contains (@var{chord} . (@var{prefix-markup} @var{suffix-markup})) entries.")
137 (chordNameSeparator ,markup?
138 "The markup object used to separate
139 parts of a chord name.")
140 (chordPrefixSpacer ,number?
141 "The space added between the root symbol and the prefix
143 (chordChanges ,boolean? "Only show changes in chords scheme?")
144 (clefGlyph ,string? "Name of the symbol within the music font.")
145 (clefOctavation ,integer? "Add
146 this much extra octavation. Values of 7 and -7 are common.")
148 (clefPosition ,number? "Where should the center of the clef
149 symbol go, measured in half staff spaces from the center of the staff.")
151 (connectArpeggios ,boolean? " If set, connect arpeggios across
153 (createKeyOnClefChange ,boolean? "Print a key signature whenever the clef is changed.")
154 (createSpacing ,boolean? "Create @code{StaffSpacing} objects?
155 Should be set for staves.")
156 (crescendoText ,markup? "Text to print at start of non-hairpin crescendo, i.e.: @samp{cresc.}")
157 (crescendoSpanner ,symbol? "Type of spanner to be used for crescendi.
158 One of: @samp{hairpin}, @samp{line}, @samp{dashed-line},
159 @samp{dotted-line}. If unset, hairpin type is used.")
160 (decrescendoText ,markup? "Text to print at start of non-hairpin decrescendo, i.e.: @samp{dim.}")
162 (drumPitchTable ,hash-table? "A table mapping percussion
163 instruments (symbols) to pitches.")
165 (drumStyleTable ,hash-table? "A hash table containing mapping
166 drums to layout settings. Predefined values: @samp{drums-style},
167 @samp{timbales-style}, @samp{congas-style}, @samp{bongos-style} and
168 @samp{percussion-style}.
170 The layout style is a hash table, containing the drum-pitches (e.g. the
171 symbol @samp{hihat}) as key, and a list (@var{notehead-style}
172 @var{script} @var{vertical-position}) as values.
174 (currentBarNumber ,integer? "Contains the current barnumber. This property is incremented at
177 (defaultBarType ,string? "Sets the default type of bar line.
178 See @code{whichBar} for information on available bar types.
180 This variable is read by @internalsref{Timing_engraver} at
181 @internalsref{Score} level.
184 (decrescendoSpanner ,symbol? "See @code{crescendoSpanner}.")
185 (doubleSlurs ,boolean?
186 "When set, two slurs are created for every slurred
187 note, one above and one below the chord.")
188 (explicitClefVisibility ,procedure? "@samp{break-visibility} function for clef changes.")
190 (explicitKeySignatureVisibility ,procedure?
191 "@samp{break-visibility} function for explicit key
192 changes. @samp{\\override} of the @code{break-visibility} property will set the
193 visibility for normal (i.e. at the start of the line) key signatures.")
195 (extraNatural ,boolean? "Whether to typeset an
196 extra natural sign before accidentals changing from a non-natural to
197 another non-natural.")
199 (extraVerticalExtent ,number-pair?
200 "extra vertical extent, same format as @var{minimumVerticalExtent}")
203 (followVoice ,boolean? "If set, note heads are tracked across staff
204 switches by a thin line")
207 "The relative size of all grobs in a context. ")
209 (fingeringOrientations ,list?
210 "List of symbols, containing
211 @samp{left}, @samp{right}, @samp{up} and/or @samp{down}. This list
212 determines where fingerings are put relative to the chord being
215 (firstClef ,boolean? "If true, create a new clef when starting a
217 (forceClef ,boolean? "Show clef symbol, even if it has not
218 changed. Only active for the first clef after the property is set, not
219 for the full staff.")
220 (gridInterval ,ly:moment?
221 "Interval for which to generate @ref{GridPoint}s")
223 (harmonicAccidentals ,boolean? "If set, harmonic notes in chords
225 (highStringOne ,boolean? "Whether the 1st string is the string with
226 highest pitch on the instrument. This used by the automatic string
227 selector for tab notation.")
229 (ignoreBarChecks ,boolean? "Ignore bar checks")
230 (ignoreMelismata ,boolean? "Ignore melismata for this @internalsref{Lyrics} line.")
231 (instr ,markup? "See @code{instrument}")
233 (instrument ,markup? "The name to print left of a staff. The
234 @code{instrument} property labels the staff in the first system, and
235 the @code{instr} property labels following lines.")
236 (instrumentEqualizer ,procedure? "
237 Function taking a string (instrument name), and returning a (@var{min} . @var{max}) pair of numbers for the loudness range of the instrument.
239 (instrumentTransposition ,ly:pitch? "Defines the transposition of
240 the instrument. Its value is the pitch that sounds like middle C. This
241 is used to transpose the MIDI output, and @code{\\quote}s.")
243 (keepAliveInterfaces ,list? "List of symbols, signifying grob interfaces that
244 are worth keeping a RemoveEmptyStaff staff around for.")
245 (keyAccidentalOrder ,list? " Alist that defines in what order
246 alterations should be printed. The format is (@var{name}
247 . @var{alter}), where @var{name} is from 0 .. 6 and @var{alter} from
248 -2 (sharp) and 2 (flat).
251 (keySignature ,list? "The current key signature. This is an alist
252 containing (@var{name} . @var{alter}) or ((@var{octave} . @var{name}) . @var{alter}).
253 where @var{name} is from 0.. 6 and
254 @var{alter} from -4 (double flat) to 4 (double sharp).
257 (majorSevenSymbol ,markup? "How should
258 the major 7th be formatted in a chord name?")
259 (markFormatter ,procedure? "Procedure
260 taking as arguments context and rehearsal mark. It should return the
261 formatted mark as a markup object.")
263 (measureLength ,ly:moment? "Length of one
264 measure in the current time signature.")
266 (measurePosition ,ly:moment? "How much of the current measure
267 have we had. This can be set manually to create incomplete
270 (melismaBusyProperties ,list? "List of properties (symbols) to
271 determine whether a melisma is playing. Setting this property will
272 influence how lyrics are aligned to notes. For example, if set to
273 @code{#'(melismaBusy beamMelismaBusy)}, only manual melismata and
274 manual beams are considered. Possible values include
275 @code{melismaBusy}, @code{slurMelismaBusy}, @code{tieMelismaBusy}, and
276 @code{beamMelismaBusy}")
279 (metronomeMarkFormatter ,procedure? "How to produce a metronome
280 markup. Called with 2 arguments, event and context.")
281 (midiInstrument ,string? "Name of the MIDI instrument to use ")
282 (midiMinimumVolume ,number? "Sets the minimum loudness for MIDI. Ranges from 0 to 1.")
283 (midiMaximumVolume ,number? "Analogous to @code{midiMinimumVolume}.")
284 (minimumFret ,number? "The tablature auto string-selecting mechanism
285 selects the highest string with a fret at least @code{minimumFret}")
286 (minimumVerticalExtent ,number-pair? "minimum vertical extent, same
287 format as @var{verticalExtent}")
288 (ottavation ,string? "If set, the text for an ottava spanner. Changing
289 this creates a new text spanner. ")
290 (pedalSustainStrings ,list? "List of string to print for
291 sustain-pedal. Format is (@var{up} @var{updown} @var{down}), where
292 each of the three is the string to print when this is done with the
294 (pedalUnaCordaStrings ,list? "See @code{pedalSustainStrings}.")
295 (pedalSostenutoStrings ,list? "See @code{pedalSustainStrings}.")
296 (pedalSustainStyle ,symbol? "A symbol that indicates how to print
297 sustain pedals: @code{text}, @code{bracket} or @code{mixed} (both).")
298 (pedalUnaCordaStyle ,symbol? "see @code{pedalSustainStyle}.")
299 (pedalSostenutoStyle ,symbol? "see @code{pedalSustainStyle}.")
300 (printKeyCancellation ,boolean? "Print restoration alterations before a key signature change. ")
301 (printPartCombineTexts ,boolean? "set Solo/A due texts in the part combiner?")
302 (printOctaveNames ,boolean? "Print octave marks for the NoteNames context.")
303 (recordEventSequence ,procedure? "When
304 @internalsref{Recording_group_engraver} is in this context, then upon
305 termination of the context, this function is called with current
306 context and a list of music objects. The list of contains entries
307 with start times, music objects and whether they are processed in this
311 (rehearsalMark ,integer? "The last rehearsal mark printed.")
312 (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}")
313 (restNumberThreshold ,number?
314 "If a multimeasure rest has more measures
315 than this, a number is printed. ")
316 (shapeNoteStyles ,vector? "Vector of symbols, listing style for each note
317 head relative to the tonic (qv.) of the scale.")
318 (skipBars ,boolean? "If set to true, then
319 skip the empty bars that are produced by multimeasure notes and rests.
320 These bars will not appear on the printed output. If not set (the
321 default) multimeasure notes and rests expand into their full length,
322 printing the appropriate number of empty bars so that synchronization
323 with other voices is preserved.
327 @@lilypond[fragment,verbatim,center]
328 r1 r1*3 R1*3 \\\\property Score.skipBars= ##t r1*3 R1*3
332 (skipTypesetting ,boolean?
333 "When true, all no typesetting is done, speeding
334 up the interpretation phase. This speeds up debugging large scores.")
335 (soloIIText ,string? "text for begin of solo for voice ``two'' when part-combining.")
336 (soloText ,string? "text for begin of solo when part-combining.")
337 (squashedPosition ,integer? " Vertical position of
338 squashing for @internalsref{Pitch_squash_engraver}.")
340 (stringNumberOrientations ,list? "See @code{fingeringOrientations}")
341 (stringOneTopmost ,boolean? "Whether the 1st string is printed on the
342 top line of the tablature.")
344 (stanza ,markup? "Stanza `number' to print before the start of a
345 verse. Use in Lyrics context.")
347 (stemLeftBeamCount ,integer? " Specify the number of beams to draw on
348 the left side of the next note. Overrides automatic beaming. The
349 value is only used once, and then it is erased.")
351 (stemRightBeamCount ,integer? "See @code{stemLeftBeamCount}.")
353 (stringTunings ,list? "The tablature strings tuning. It is a list
354 of the pitch (in semitones) of each string (starting with the lower
357 (subdivideBeams ,boolean? "If set, multiple beams will be subdivided
358 at beat positions by only drawing one beam over the beat.")
360 (systemStartDelimiter ,symbol? "Which grob to make for the start of
361 the system/staff? Set to @code{SystemStartBrace},
362 @code{SystemStartBracket} or @code{SystemStartBar}.")
364 (tablatureFormat ,procedure? "Function formatting a tab note head; it
365 takes a string number, a list of string tunings and Pitch object. It
366 returns the text as a string.")
368 (tieWaitForNote ,boolean? "If true, tied notes do not have to follow each other directly.
369 This can be used for writing out arpeggios")
370 (timeSignatureFraction ,number-pair?
371 "pair of numbers, signifying the time
372 signature. For example @code{#'(4 . 4)} is a 4/4 time signature.")
374 (timing ,boolean? " Keep administration of measure length, position, bar number, etc?
375 Switch off for cadenzas.")
377 "The tonic of the current scale")
379 (tremoloFlags ,integer? "Number of tremolo flags to add if no
380 number is specified.")
382 (tupletNumberFormatFunction
384 "Function taking a music as input, producing a string. This function
385 is called to determine the text to print on a tuplet bracket.")
387 (tupletSpannerDuration ,ly:moment? "
388 Normally a tuplet bracket is as wide as the
389 @code{\\times} expression that gave rise to it. By setting this
390 property, you can make brackets last shorter. Example
393 @@lilypond[verbatim,fragment]
394 context Voice \\times 2/3 @{
395 property Voice.tupletSpannerDuration = #(ly:make-moment 1 4)
401 (verticalAlignmentChildCallback ,procedure? "What callback to add
402 to children of a vertical alignment. It determines what
403 procedure is used on the alignment itself.")
404 (verticalExtent ,number-pair? "Hard coded vertical extent. The format
405 is a pair of dimensions, for example, this sets the sizes of a staff
406 to 10 (5+5) staffspaces high.
409 \\set Staff.verticalExtent = #'(-5.0 . 5.0)
413 This does not work for Voice or any other context that doesn't form a
416 (verticallySpacedContexts ,list? "List of symbols, containing
417 context names whose vertical axis groups should be taken into account for
418 vertical spacing of systems.")
420 (vocalName ,markup? "Name of a vocal line.")
421 (vocNam ,markup? "Name of a vocal line, short version.")
423 (voltaOnThisStaff ,boolean?
424 "Normally, volta brackets are put only on the
425 topmost staff. This variable overrides this behavior, when set to
426 @code{#t} or @code{#f}.")
428 (voltaSpannerDuration ,ly:moment? "This specifies the maximum duration
429 to use for the brackets printed for @code{\\alternative}. This can be
430 used to shrink the length of brackets in the situation where one
431 alternative is very large.")
435 "This property is read to determine what type of bar line to create.
439 \\set Staff.whichBar = \"|:\"
442 This will create a start-repeat bar in this staff only.
443 Valid values are described in @internalsref{bar-line-interface}.
447 (define-public all-internal-translation-properties
450 (set-object-property! (car x) 'internal-translation #t)
451 (apply translator-property-description x)
455 `((slurMelismaBusy ,boolean? "Signal if a slur is present.")
456 (originalCentralCPosition
458 "Used for temporary overriding middle C in octavation brackets. ")
459 (melismaBusy ,boolean? "Signifies
460 whether a melisma is active. This can be used to signal melismas on
461 top of those automatically detected. ")
462 (graceSettings ,list?
463 "Overrides for grace notes. This property should
464 be manipulated through the @code{add-grace-property} function.")
465 (currentCommandColumn ,ly:grob? "Grob that is X-parent to all
466 current breakable (clef, key signature, etc.) items.")
467 (currentMusicalColumn ,ly:grob? "Grob that is X-parent to all
468 non-breakable items (note heads, lyrics, etc.).")
469 (breakableSeparationItem ,ly:grob?
470 "The breakable items in this time step,
473 (localKeySignature ,list? "the key signature at this point in the
474 measure. The format is the same as for keySignature, but can also
475 contain ((@var{octave} . @var{name}) . (@var{alter} . @var{barnumber}))
476 pairs. It is reset at every bar line.")
479 (localKeySignatureChanges ,list? "Experimental. [DOCME]")
481 (finalizations ,list? "List of expressions to evaluate before proceeding to next time step. Internal variable.")
482 (busyGrobs ,list? "a queue of (@var{end-moment} . @var{GROB})
483 conses. This is for internal (C++) use only. This property contains
484 the grobs which are still busy (e.g. note heads, spanners, etc.)
486 (barCheckLastFail ,ly:moment? "Where in the measure did the last barcheck fail?")
487 (associatedVoiceContext ,ly:context? "The context object of the Voice that has the melody for this Lyrics.")
488 (acceptHashTable ,vector? "Internal
489 variable: store table with MusicName to Engraver entries.")
490 (acknowledgeHashTable ,vector?
491 "Internal variable: store interface to engraver smob table for current
494 (beamMelismaBusy ,boolean? "Signal if a beam is present.")
495 (dynamicAbsoluteVolumeFunction ,procedure? "[DOCUMENT-ME]")
497 (lastKeySignature ,list? "Last key signature before a key
500 (scriptDefinitions ,list? "Description of scripts. This is used by
501 Script_engraver for typesetting note-super/subscripts. See
502 @file{scm/script.scm} for more information
504 (quotedEventTypes ,list? "List of symbols, representing the
505 event types that should be duplicated for @code{\\quote} commands.")
507 ; (quotes ,hash-table? "Hash table, mapping names to music-event vectors.")
508 (stavesFound ,grob-list? "list of all staff-symbols found.")
509 (instrumentSupport ,grob-list? "list of grobs to attach instrument name
511 (tieMelismaBusy ,boolean? "Signal whether a tie is present.")
512 (tweakCount ,number? "Number of otherwise unique Contexts.")
513 (tweakRank ,number? "Identify otherwise unique Contexts.")
516 (define-public all-translation-properties
517 (append all-user-translation-properties
518 all-internal-translation-properties))
520 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
522 (define-public default-melisma-properties '(melismaBusy slurMelismaBusy tieMelismaBusy beamMelismaBusy))