Hi Bernardo,
please see attached. Does it fit your needs?
Hi Federico,
2015-10-24 10:12 GMT+02:00 Federico Bruni <[email protected]>:
> Il giorno ven 23 ott 2015 alle 21:49, Thomas Morley
> <[email protected]> ha scritto:
>>
>> I recently made some code offering the possibility that TabStaff
>> accepts quarter-tones.
>
The attached code is the newest version
>
> Harm, should I enter an issue in the tracker for this? So if/when you have
> time to include it in LilyPond (as you said you'd like to do one day) we'll
> know it.
As a reminder, please do. Thanks.
Cheers,
Harm
\version "2.19.29"
#(define-public
(my-determine-frets context notes specified-info . rest)
"Determine string numbers and frets for playing @var{notes}
as a chord, given specified information @var{specified-info}.
@var{specified-info} is a list with two list elements,
specified strings @code{defined-strings} and
specified fingerings @code{defined-fingers}. Only a fingering of@tie{}0
will affect the fret selection, as it specifies an open string.
If @code{defined-strings} is @code{'()}, the context property
@code{defaultStrings} will be used as a list of defined strings.
Will look for predefined fretboards if @code{predefinedFretboardTable}
is not @code {#f}. If @var{rest} is present, it contains the
@code{FretBoard} grob, and a fretboard will be
created. Otherwise, a list of @code{(string fret finger)} lists will
be returned.
Quarter-tones are supported, but the printed output may not be very helpful,
unless a reasonable drawing-routine is set for
@code{TabNoteHead.before-line-breaking}"
;; helper functions
(define (string-frets->placement-list string-frets string-count)
"Convert @var{string-frets} to @code{fret-diagram-verbose}
dot placement entries."
(let* ((placements (list->vector
(map (lambda (x) (list 'mute x))
(iota string-count 1)))))
(for-each (lambda (sf)
(let* ((string (car sf))
(fret (cadr sf))
(finger (caddr sf)))
(vector-set!
placements
(1- string)
(if (= 0 fret)
(list 'open string)
(if finger
(list 'place-fret string fret finger)
(list 'place-fret string fret))))))
string-frets)
(vector->list placements)))
(define (placement-list->string-frets placement-list)
"Convert @var{placement-list} to string-fret list."
(map (lambda (x) (if (eq? (car x) 'place-fret)
(cdr x)
(list (cadr x) 0)))
(filter (lambda (l) (or (eq? (car l) 'place-fret)
(eq? (car l) 'open)))
placement-list)))
(define (entry-count art-list)
"Count the number of entries in a list of articulations."
(length (filter (lambda (x) (not (null? x)))
art-list)))
(define (string-number event)
"Get the string-number from @var{event}. Return @var{#f}
if no string-number is present."
(let ((num (ly:event-property event 'string-number)))
(and (integer? num) (positive? num) num)))
(define (determine-frets-and-strings
notes
defined-strings
defined-fingers
minimum-fret
maximum-stretch
tuning)
"Determine the frets and strings used to play the notes in
@var{notes}, given @var{defined-strings} and @var{defined-fingers}
along with @var{minimum-fret}, @var{maximum-stretch}, and
@var{tuning}. Returns a list of @code{(string fret finger) lists."
(define restrain-open-strings (ly:context-property context
'restrainOpenStrings
#f))
(define specified-frets '())
(define free-strings (iota (length tuning) 1))
(define (calc-fret pitch string tuning)
"Calculate the fret to play @var{pitch} on @var{string} with
@var{tuning}."
(* 2 (- (ly:pitch-tones pitch) (ly:pitch-tones (list-ref tuning (1- string))))))
(define (note-pitch note)
"Get the pitch (in semitones) from @var{note}."
(ly:event-property note 'pitch))
(define (note-finger ev)
"Get the fingering from @var{ev}. Return @var{#f}
if no fingering is present."
(let* ((articulations (ly:event-property ev 'articulations))
(finger-found #f))
(for-each (lambda (art)
(let* ((num (ly:event-property art 'digit)))
(if (and (ly:in-event-class? art 'fingering-event)
(number? num)
(> num 0))
(set! finger-found num))))
articulations)
finger-found))
(define (delete-free-string string)
(if (number? string)
(set! free-strings
(delete string free-strings))))
(define (close-enough fret)
"Decide if @var{fret} is acceptable, given the already used frets."
(every (lambda (specced-fret)
(or (zero? specced-fret)
(zero? fret)
(>= maximum-stretch (abs (- fret specced-fret)))))
specified-frets))
(define (string-qualifies string pitch)
"Can @var{pitch} be played on @var{string}, given already placed
notes?"
(let* ((fret (calc-fret pitch string tuning)))
(and (or (and (not restrain-open-strings)
(zero? fret))
(>= fret minimum-fret))
(integer? (truncate fret))
(close-enough fret))))
(define (open-string string pitch)
"Is @var{pitch} and open-string note on @var{string}, given
the current tuning?"
(let* ((fret (calc-fret pitch string tuning)))
(zero? fret)))
(define (set-fret! pitch-entry string finger)
(let* ((this-fret (calc-fret (car pitch-entry)
string
tuning)))
(if (< this-fret 0)
(ly:warning (_ "Negative fret for pitch ~a on string ~a")
(car pitch-entry) string))
(delete-free-string string)
(set! specified-frets (cons this-fret specified-frets))
(list-set! string-fret-fingers
(cdr pitch-entry)
(list string this-fret finger))))
(define (kill-note! string-fret-fingers note-index)
(list-set! string-fret-fingers note-index (list #f #t)))
(define string-fret-fingers
(map (lambda (string finger)
(if (null? finger)
(list string #f)
(list string #f finger)))
defined-strings defined-fingers))
;;; body of determine-frets-and-strings
(let* ((pitches (map note-pitch notes))
(pitch-alist (map cons pitches (iota (length pitches)))))
;; handle notes with strings assigned and fingering of 0
(for-each
(lambda (pitch-entry string-fret-finger)
(let* ((string (list-ref string-fret-finger 0))
(finger (if (= (length string-fret-finger) 3)
(list-ref string-fret-finger 2)
'()))
(pitch (car pitch-entry))
(digit (if (null? finger)
#f
finger)))
(if (or (not (null? string))
(eqv? digit 0))
(if (eqv? digit 0)
;; here we handle fingers of 0 -- open strings
(let ((fit-string
(find (lambda (string)
(open-string string pitch))
free-strings)))
(if fit-string
(set-fret! pitch-entry fit-string #f)
(ly:warning (_ "No open string for pitch ~a")
pitch)))
;; here we handle assigned strings
(let ((this-fret
(calc-fret pitch string tuning))
(handle-negative
(ly:context-property context
'handleNegativeFrets
'recalculate)))
(cond ((or (and (>= this-fret 0) (integer? this-fret))
(eq? handle-negative 'include))
(set-fret! pitch-entry string finger))
((eq? handle-negative 'recalculate)
(begin
(ly:warning
(_ "Requested string for pitch requires negative fret: string ~a pitch ~a")
string
pitch)
(ly:warning (_ "Ignoring string request and recalculating."))
(list-set! string-fret-fingers
(cdr pitch-entry)
(if (null? finger)
(list '() #f)
(list '() #f finger)))))
((eq? handle-negative 'ignore)
(begin
(ly:warning
(_ "Requested string for pitch requires negative fret: string ~a pitch ~a")
string
pitch)
(ly:warning (_ "Ignoring note in tablature."))
(kill-note! string-fret-fingers
(cdr pitch-entry))))))))))
pitch-alist string-fret-fingers)
;; handle notes without strings assigned -- sorted by pitch, so
;; we need to use the alist to have the note number available
(for-each
(lambda (pitch-entry)
(let* ((string-fret-finger (list-ref string-fret-fingers
(cdr pitch-entry)))
(string (list-ref string-fret-finger 0))
(finger (if (= (length string-fret-finger) 3)
(list-ref string-fret-finger 2)
'()))
(pitch (car pitch-entry))
(fit-string
(find (lambda (string)
(string-qualifies string pitch))
free-strings)))
(if (not (list-ref string-fret-finger 1))
(if fit-string
(set-fret! pitch-entry fit-string finger)
(begin
(ly:event-warning
(list-ref notes (cdr pitch-entry))
(_ "No string for pitch ~a (given frets ~a)")
pitch
specified-frets)
(kill-note! string-fret-fingers
(cdr pitch-entry)))))))
(sort pitch-alist (lambda (pitch-entry-a pitch-entry-b)
(ly:pitch<? (car pitch-entry-b)
(car pitch-entry-a)))))
string-fret-fingers)) ;; end of determine-frets-and-strings
(define (get-predefined-fretboard predefined-fret-table tuning pitches)
"Search through @var{predefined-fret-table} looking for a predefined
fretboard with a key of @var{(tuning . pitches)}. The search will check
both up and down an octave in order to accomodate transposition of the
chords. Returns a placement-list."
(define (get-fretboard key)
(let ((hash-handle
(hash-get-handle predefined-fret-table key)))
(if hash-handle
(cdr hash-handle) ; return table entry
'())))
;; body of get-predefined-fretboard
(let ((test-fretboard (get-fretboard (cons tuning pitches))))
(if (not (null? test-fretboard))
test-fretboard
(let ((test-fretboard
(get-fretboard
(cons tuning (map (lambda (x) (shift-octave x 1)) pitches)))))
(if (not (null? test-fretboard))
test-fretboard
(get-fretboard
(cons tuning (map (lambda (x) (shift-octave x -1))
pitches))))))))
;; body of determine-frets
(let* ((predefined-fret-table
(ly:context-property context 'predefinedDiagramTable))
(tunings (ly:context-property context 'stringTunings))
(string-count (length tunings))
(grob (if (null? rest) '() (car rest)))
(pitches (map (lambda (x) (ly:event-property x 'pitch)) notes))
(defined-strings (map (lambda (x)
(if (null? x)
x
(or (string-number x) '())))
(car specified-info)))
(defined-fingers (map (lambda (x)
(if (null? x)
x
(ly:event-property x 'digit)))
(cadr specified-info)))
(default-strings (ly:context-property context 'defaultStrings '()))
(strings-used (if (and (zero? (entry-count defined-strings))
(not (zero? (entry-count default-strings))))
default-strings
defined-strings))
(predefined-fretboard
(if predefined-fret-table
(get-predefined-fretboard
predefined-fret-table
tunings
pitches)
'())))
(if (null? predefined-fretboard)
(let ((string-frets
(determine-frets-and-strings
notes
strings-used
defined-fingers
(ly:context-property context 'minimumFret 0)
(ly:context-property context 'maximumFretStretch 4)
tunings)))
(if (null? grob)
string-frets
(create-fretboard
context grob (string-frets->placement-list
(filter (lambda (entry)
(car entry))
string-frets)
string-count))))
(if (null? grob)
(placement-list->string-frets predefined-fretboard)
(create-fretboard context grob predefined-fretboard)))))
%% Also see:
%% http://lilypond.1069038.n5.nabble.com/guile-question-3-2-gt-quot-1-1-2-quot-td179440.html
#(define (integer-and-fraction nmbr)
"Return a list with an integer and a fraction build from an exact number
Example: 47/7 -> (6 5/7)"
(let* ((wh (truncate nmbr))
(rem (- nmbr wh))
(fret-string
(if (or (zero? wh) (zero? rem))
(format #f "~s 0" nmbr)
(format #f "~s ~s" wh (abs rem)))))
;; TODO: rethink best output format!
;; change to Andrews proposal?
;; string-output, with the need to change 'my-format-tab-note-head':
; fret-string
;; list-output:
(cond ((and (zero? wh) (zero? rem))
(list nmbr 0))
((zero? rem)
(list wh 0))
((zero? wh)
(list 0 rem))
(else (list wh rem)))))
%% Better to do formatting not in `my-determine-frets'
%% TODO better coding for all this string->number/number->string
#(define my-format-tab-note-head
(lambda (grob)
(let* ((txt (ly:grob-property grob 'text))
(nmbr (if (null? txt) "" (car (last-pair txt))))
(string-nmbr (string->number nmbr)))
(if (and (string? nmbr) string-nmbr)
(let* ((val (integer-and-fraction string-nmbr))
(fret
(if (and (zero? (car val)) (not (zero? (cadr val))))
""
(number->string (car val))))
(frac
(if (zero? (cadr val))
""
(markup
#:fontsize -2.5
(number->string (cadr val))))))
(ly:grob-set-property! grob 'text
#{ \markup \concat \vcenter { #fret #frac } #}))
txt))))
\layout {
\context {
\Score
noteToFretFunction = #my-determine-frets
}
\context {
\TabStaff
\override TabNoteHead.before-line-breaking = #my-format-tab-note-head
}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXAMPLE
%%%%%%%%%%%%%%%%%%%%%%%%%%%%
mus = {
geses
geseh
ges
geh
g
gih
gis
gisih
gisis
}
test-music =
\relative eeh, {
\cadenzaOn
<>^"E"
\transpose g e,
%% exclude `eeses', `eeseh' and `ees' for current string-tuning
$(make-sequential-music
(drop (ly:music-deep-copy (ly:music-property mus 'elements)) 3))
<>^"F" \bar "||"
\transpose g f,
%% exclude `feses' for current string-tuning
$(make-sequential-music
(drop (ly:music-deep-copy (ly:music-property mus 'elements)) 1))
<>^"G" \bar "||" \transpose g g, \mus
<>^"A" \bar "||" \transpose g a, \mus
<>^"B" \bar "||" \transpose g b, \mus
<>^"C" \bar "||" \transpose g c \mus
<>^"D" \bar "||" \transpose g d \mus
<>^"E" \bar "||" \transpose g e \mus
<>^"F" \bar "||" \transpose g f \mus
<>^"G" \bar "||" \transpose g g \mus
<>^"A" \bar "||" \transpose g a \mus
<>^"B" \bar "||" \transpose g b \mus
<>^"C" \bar "||" \transpose g c' \mus
<>^"D" \bar "||" \transpose g d' \mus
<>^"E" \bar "||" \transpose g e' \mus
<>^"F" \bar "||" \transpose g f' \mus
<>^"G" \bar "||" \transpose g g' \mus
<>^"A" \bar "||" \transpose g a' \mus
<>^"B" \bar "||" \transpose g b' \mus
\bar "||"
}
custom-tuning = \stringTuning <eeh, a, d ges beh eeh'>
<<
\new Staff << \clef "G_8" \test-music >>
\new TabStaff \with { stringTunings = \custom-tuning } \test-music
>>
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