-;;;; fret-diagrams.scm --
-;;;;
-;;;; source file of the GNU LilyPond music typesetter
-;;;;
-;;;; (c) 2004 Carl D. Sorensen <c_sorensen@byu.edu>
-
-
-
-(define ly:paper-lookup ly:output-def-lookup) ; compat for 2.3, remove when using 2.2
-
-(define (fret-parse-marking-list marking-list fret-count)
- (let* ((fret-range (list 1 fret-count))
- (barre-list '())
- (dot-list '())
- (xo-list '())
- (output-alist '()))
- (let parse-item ((mylist marking-list))
- (if (not (null? mylist))
- (let* ((my-item (car mylist)) (my-code (car my-item)))
- (cond
- ((or (eq? my-code 'open)(eq? my-code 'mute))
- (set! xo-list (cons* my-item xo-list)))
- ((eq? my-code 'barre)
- (set! barre-list (cons* (cdr my-item) barre-list)))
- ((eq? my-code 'place-fret)
- (set! dot-list (cons* (cdr my-item) dot-list))))
- (parse-item (cdr mylist)))))
- ; calculate fret-range
- (let ((maxfret 0) (minfret 99))
- (let updatemax ((fret-list dot-list))
- (if (null? fret-list)
- '()
- (let ((fretval (second (car fret-list))))
- (if (> fretval maxfret) (set! maxfret fretval))
- (if (< fretval minfret) (set! minfret fretval))
- (updatemax (cdr fret-list)))))
- (if (> maxfret fret-count)
- (set! fret-range (list minfret
- (let ((upfret (- (+ minfret fret-count) 1)))
- (if (> maxfret upfret) maxfret upfret)))))
- ; subtract fret from dots
- (set! dot-list (subtract-base-fret (- (car fret-range) 1) dot-list)))
-; (display "barre-list ") (display barre-list) (display "\n")
- (acons 'fret-range fret-range
- (acons 'barre-list barre-list
- (acons 'dot-list dot-list
- (acons 'xo-list xo-list '()))))))
-
-(define (subtract-base-fret base-fret dot-list)
-"Subtract @var{base-fret} from every fret in @var{dot-list}"
- (if (null? dot-list)
- '()
- (let ((this-list (car dot-list)))
- (cons* (list (car this-list) (- (second this-list) base-fret) (if (null? (cddr this-list))
- '()
- (third this-list)))
- (subtract-base-fret base-fret (cdr dot-list))))))
-
-(define (draw-strings string-count fret-range th size)
-"Draw the strings (vertical lines) for a fret diagram with @var{string-count} strings and frets as indicated
- in @var{fret-range}. Line thickness is given by @var{th}, fret & string spacing by @var{size}. "
- (let* ((fret-count (+ (- (cadr fret-range) (car fret-range)) 1))
- (sl (* (+ fret-count 1) size))
- (sth (* size th))
- (half-thickness (* sth 0.5))
- (gap (- size sth))
- (string-stencil (ly:make-stencil (list 'draw-line sth 0 0 0 sl)
- (cons (- half-thickness) half-thickness)
- (cons (- half-thickness) (+ sl half-thickness)))))
- (if (= string-count 1)
- string-stencil
- (ly:stencil-combine-at-edge
- (draw-strings (- string-count 1) fret-range th size) X RIGHT
- string-stencil
- gap 0))))
-
-(define (draw-fret-lines fret-count string-count th size)
- "Draw @var{fret-count} frets (horizontal lines) for a fret diagram with @var{string-count} strings.
- Line thickness is given by @var{th}, fret & string spacing by @var{size}. "
- (let* ((fret-length (* (- string-count 1) size))
- (sth (* size th))
- (half-thickness (* sth 0.5))
- (gap (- size sth))
- (fret-line (ly:make-stencil (list 'draw-line sth half-thickness size (- fret-length half-thickness) size)
- (cons 0 fret-length)
- (cons (- size half-thickness) (+ size half-thickness)))))
- (if (= fret-count 1)
- fret-line
- (ly:stencil-combine-at-edge fret-line Y UP
- (draw-fret-lines (- fret-count 1) string-count th size)
- gap 0))))
-
-(define (draw-thick-top-fret props string-count th size)
- "Draw a thick top fret for a fret diagram whose base fret is not 1."
- (let* ((sth (* th size))
- (top-fret-thick (* sth (chain-assoc-get 'top-fret-thickness props 3.0)))
- (top-half-thick (* top-fret-thick 0.5))
- (half-thick (* sth 0.5))
- (x1 half-thick)
- (x2 (+ half-thick (* size (- string-count 1))))
- (y1 0)
- (y2 top-fret-thick)
- (x-extent (cons (- x1) x2))
- (y-extent (cons 0 y2)))
- (ly:make-stencil (list 'round-filled-box x1 x2 y1 y2 th)
- x-extent y-extent)))
-
-
-(define (draw-frets paper props fret-range string-count th size)
- "Draw the frets (horizontal lines) for a fret diagram with @var{string-count} strings and frets as indicated
- in @var{fret-range}. Line thickness is given by @var{th}, fret & string spacing by @var{size}. "
- (let* ((top-fret-thick (* th (chain-assoc-get 'top-fret-thickness props 3.0)))
- (fret-count (+ (- (cadr fret-range) (car fret-range)) 1))
- (fret-length (* (- string-count 1) size))
- (half-thickness (* th 0.5))
- (base-fret (car fret-range)))
- (ly:stencil-combine-at-edge
- (draw-fret-lines fret-count string-count th size) Y UP
- (if (= base-fret 1)
- (draw-thick-top-fret props string-count th size)
- (draw-fret-lines 1 string-count th size))
- (- size th) 0)))
-
-(define (get-center-shift extent)
-"Return the amount of shift required to make @var{extent} be centered"
- (let ((minval (car extent))
- (maxval (cdr extent)))
- (/ (- minval maxval) 2)))
-
-
-;; ly:stencil-get-extent is missing from 2.2 on
-;(define (centered-text-stencil font text)
-;"Create a centered text stencil of @var{text} in font @var{font}"
-;(let* ((text-stencil (fontify-text font text))
-; (x-shift (get-center-shift (ly:stencil-get-extent text-stencil X)))
-; (y-shift (get-center-shift y-extent (ly:stencil-get-extent text-stencil Y))))
-; (ly:stencil-translate-axis
-; (ly:stencil-translate-axis text-stencil x-shift X)
-; y-shift Y)))
-
-(define (draw-dots paper props string-count fret-range size dot-position dot-list)
- "Make dots for fret diagram."
-; (display "In draw-dots" dot-list)
- (let* ((finger-code (chain-assoc-get 'finger-code props 'none))
- (dot-radius (* size (chain-assoc-get 'dot-radius props 0.25)))
- (finger-xoffset (chain-assoc-get 'finger-xoffset props -0.25))
- (finger-yoffset (chain-assoc-get 'finger-yoffset props (- size)))
- (label-font-name (chain-assoc-get 'label-font-name props "cmss8"))
- (dot-label-font-mag (* size (chain-assoc-get 'dot-label-font-mag props .45)))
- (dot-circle-font-mag (* size (chain-assoc-get 'dot-circle-font-mag props .75)))
- (string-label-font-mag (* size (chain-assoc-get 'string-label-font-mag props 0.6)))
- (fret-count (+ (- (cadr fret-range) (car fret-range) 1)))
- (mypair (car dot-list))
- (restlist (cdr dot-list))
- (xpos (* size (- string-count (car mypair))))
-;TODO -- figure out what 4 is and get rid of it
-;UGH -- 4?
- (ypos (* size (+ 4 (- fret-count (cadr mypair) dot-position ))))
- (finger (caddr mypair))
- (finger (if (number? finger) (number->string finger) finger))
- (string-label-font (ly:paper-get-font paper `(((font-magnification . ,string-label-font-mag)
- (font-name . ,label-font-name)))))
- (dot-label-font (ly:paper-get-font paper `(((font-magnification . ,dot-label-font-mag)
- (font-name . ,label-font-name)))))
- (dot-circle-font (ly:paper-get-font paper `(((font-magnification . ,dot-circle-font-mag)
- (font-name . ,label-font-name)))))
- (extent (cons (- dot-radius) dot-radius))
- (dotstencil (if (or (eq? finger '())(eq? finger-code 'none))
- (ly:make-stencil (list 'dot xpos ypos dot-radius ) extent extent)
- (if (eq? finger-code 'white-circled)
-; TODO -- Get nice circled numbers in the font, instead of this kludge
-; UGH -- Constants in here need to go
-; Note: for finger (this stencil) xpos should be related only to font size, ypos should be related to both font size and dot-position
-; These are not yet worked out, and should be. But perhaps I'd like first to get a nice font for circled numbers / letters
- (ly:stencil-add
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis
- (fontify-text dot-label-font finger) (- xpos (* size 0.2)) X)
- (- ypos (* 1 dot-radius size)) Y)
-; These lines are a better way to do it, but they require ly:stencil-get-extent, which is missing from 2.2.0
-; (centered-text-stencil dot-label-font finger) xpos X)
-; ypos Y)
- ;UGH -- Constants in xpos and ypos need to go. xpos should be related to font mag,
- ; ypos should be related to both font magnification and dot-position. Again, I may want to wait for the nice font with
- ; convenient zero point (right at the center of the dot).
- ;TODO -- Alternatively, perhaps I should query for the extent of the glyph,
- ; and place it accordingly. That actually sounds better
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis
- (fontify-text dot-circle-font "O") (- xpos (* 0.6 dot-circle-font-mag)) X)
- (- ypos (* 0.5 dot-circle-font-mag)) Y))
-; These lines are a better way to do it, but they require ly:stencil-get-exten, which is missing from 2.2.0
-; (centered-text-stencil dot-circle-font "O") xpos X)
-; ypos Y))
- (if (eq? finger-code 'below-string)
- (ly:stencil-add
- (ly:make-stencil (list 'dot xpos ypos dot-radius ) extent extent)
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis
- (fontify-text string-label-font finger) (+ xpos (* size finger-xoffset)) X)
- (* size finger-yoffset) Y)))))))
- (if (null? restlist)
- dotstencil
- (ly:stencil-add (draw-dots paper props string-count fret-range size dot-position restlist)
- dotstencil))))
-
-(define (draw-xo paper props string-count fret-range size xo-list)
-"Put open and mute string indications on diagram, as contained in @var{xo-list}."
- (let* ((fret-count (+ (- (cadr fret-range) (car fret-range) 1)))
- (xo-font-mag (* size (chain-assoc-get 'xo-font-magnification props 0.5)))
- (xo-font-name (chain-assoc-get 'xo-font-name props "cmss8"))
- (xo-horizontal-offset (* size (chain-assoc-get 'xo-horizontal-offset props -0.35)))
- (font (ly:paper-get-font paper `(((font-magnification . ,xo-font-mag)
- (font-name . ,xo-font-name)))))
- (mypair (car xo-list))
- (restlist (cdr xo-list))
- (glyph-string (if (eq? (car mypair) 'mute) "X" "O"))
- (xpos (+ (* (- string-count (cadr mypair)) size) xo-horizontal-offset ))
- (glyph-stencil (ly:stencil-translate-axis (fontify-text font glyph-string) xpos X)))
- (if (null? restlist)
- glyph-stencil
- (ly:stencil-add
- (draw-xo paper props string-count fret-range size restlist)
- glyph-stencil))))
-
-(define (make-bezier-sandwich-list left right bottom height thickness)
-" Make the argument list for a horizontal bezier sandwich from @var{left} to @var{right} with a bottom at @var{bottom},
- a height of @var{height}, and a thickness of @var{thickness}."
- (let* ((width (+ (- right left) 1))
- (x1 (+ (* width thickness) left))
- (x2 (- right (* width thickness)))
- (bottom-control-point-height (+ bottom (- height thickness)))
- (top-control-point-height (+ bottom height)))
- ; order of points is: left cp low, right cp low, right end low, left end low
- ; right cp high, left cp high, left end high, right end high.
- (list (cons x1 bottom-control-point-height) (cons x2 bottom-control-point-height) (cons right bottom) (cons left bottom)
- (cons x2 top-control-point-height) (cons x1 top-control-point-height) (cons left bottom) (cons right bottom))))
-
-(define (draw-barre paper props string-count fret-range size dot-position barre-list)
- "Create barre indications for a fret diagram"
- (if (not (null? barre-list))
- (let* ((string1 (caar barre-list))
- (string2 (cadar barre-list))
- (fret (caddar barre-list))
- ; 2 is 1 for empty fret at bottom of figure + 1 for interval (top-fret - fret + 1) -- not an arbitrary constant
- (bottom (* size (- (+ 2 (- (cadr fret-range) fret)) dot-position)))
- (left (* size (- string-count string1)))
- (right (* size (- string-count string2)))
- (bezier-thick (chain-assoc-get 'bezier-thickness props 0.1))
- (bezier-height (chain-assoc-get 'bezier-height props 0.5))
- (bezier-list (make-bezier-sandwich-list left right bottom (* size bezier-height) (* size bezier-thick)))
- (sandwich-stencil (ly:make-stencil (list 'bezier-sandwich `(quote ,bezier-list) (* size bezier-thick) )
- (cons 0 right)
- (cons 0 (+ bottom (* size bezier-height))))))
- (if (not (null? (cdr barre-list)))
- (ly:stencil-add sandwich-stencil
- (draw-barre paper props string-count fret-range size dot-position (cdr barre-list)))
- sandwich-stencil ))))
-
-(define (label-fret paper props string-count fret-range size)
- "Label the base fret on a fret diagram"
- (let* ((base-fret (car fret-range))
- (label-font-mag (chain-assoc-get 'fret-label-font-magnification props 0.8))
- (label-horizontal-offset (chain-assoc-get 'fret-label-horizontal-offset props -0.5))
- (label-vertical-offset (chain-assoc-get 'fret-label-vertical-offset props -0.2))
- (fret-count (+ (- (cadr fret-range) (car fret-range)) 1))
- (font (ly:paper-get-font paper `(((font-magnification . ,(* label-font-mag size))(font-name . "cmss8")
- (font-encoding Tex-text))))))
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis (fontify-text font (if (> base-fret 1)
- (format #f "~(~:@r~)" base-fret)
- " ")) (* size (+ string-count label-horizontal-offset)) X)
- (* size (+ fret-count label-vertical-offset)) Y)))
-
-(def-markup-command (fret-diagram-verbose paper props marking-list)
- (list?)
- "Make a fret diagram containing the symbols indicated in @var{marking-list}
- Syntax: \\fret-diagram marking-list
- For example,
-@verbatim
- \\markup \\fret-diagram #'((mute 6) (mute 5) (open 4) (place-fret 3 2) (place-fret 2 3) (place-fret 1 2))
-@end verbatim
- will produce a standard D chord diagram without fingering indications.
- Possible elements in @var{marking-list}:
-
-@table @code
-@item (mute string-number)
-place a small 'x' at the top of string @var{string-number}
-@item (open string-number)
- place a small 'o' at the top of string @var{string-number}
-@item (barre start-string end-string fret-number)
- place a barre indicator (much like a tie) from string @var{start-string}
- to string @var{end-string} at fret @var{fret-number}
-@item (place-fret string-number fret-number finger-value)
- place a fret playing indication
- on string @var{string-number} at fret @var{fret-number} with an optional fingering label @var{finger-value}
- By default, the fret playing indicator is a solid dot. If the @var{finger} part of the place-fret element is present,
- @var{finger-value} will be displayed according to the setting of the variable @var{finger-code}
- There is no limit to the number of fret indications per string.
-
-@end table
-"
- (make-fret-diagram paper props marking-list))
-
-(define (make-fret-diagram paper props marking-list)
-" Make a fret diagram markup"
- (let* (
- ; note: here we get items from props that are needed in this routine, or that are needed in more than one
- ; of the procedures called from this routine. If they're only used in one of the sub-procedure, they're
- ; obtained in that procedure
-
- (size (chain-assoc-get 'size props 1.0)) ; needed for everything
-;TODO -- get string-count directly from length of stringTunings; requires FretDiagram engraver, which is not yet available
- (string-count (chain-assoc-get 'string-count props 6)) ; needed for everything
- (fret-count (chain-assoc-get 'fret-count props 4)) ; needed for everything
- (dot-position (chain-assoc-get 'dot-position props 0.6)) ; needed for both draw-dots and draw-barre
- (th (* (ly:paper-lookup paper 'linethickness)
- (chain-assoc-get 'thickness props 0.5))) ; needed for both draw-frets and draw-strings
-
- (alignment (chain-assoc-get 'alignment props -0.4)) ; needed only here
- (xo-padding (* th (chain-assoc-get 'xo-padding props 2))) ; needed only here
-
- (parameters (fret-parse-marking-list marking-list fret-count))
- (dot-list (cdr (assoc 'dot-list parameters)))
- (xo-list (cdr (assoc 'xo-list parameters)))
- (fret-range (cdr (assoc 'fret-range parameters)))
- (barre-list (cdr (assoc 'barre-list parameters)))
- (fret-diagram-stencil (ly:stencil-add
- (draw-strings string-count fret-range th size)
- (draw-frets paper props fret-range string-count th size))))
- (if (not (null? dot-list))
- (set! fret-diagram-stencil (ly:stencil-add
- (draw-dots paper props string-count fret-range size dot-position dot-list)
- fret-diagram-stencil)))
- (if (not (null? xo-list))
- (set! fret-diagram-stencil (ly:stencil-combine-at-edge
- fret-diagram-stencil Y UP
- (draw-xo paper props string-count fret-range size xo-list) xo-padding 0)))
- (if (not (null? barre-list))
- (set! fret-diagram-stencil (ly:stencil-add
- (draw-barre paper props string-count fret-range size dot-position barre-list)
- fret-diagram-stencil)))
- (set! fret-diagram-stencil (ly:stencil-add fret-diagram-stencil (label-fret paper props string-count fret-range size)))
- (ly:stencil-align-to! fret-diagram-stencil X alignment)
- fret-diagram-stencil))
-
-(def-markup-command (fret-diagram paper props size definition-string)
- (number? string?)
- "Syntax: \\fret-diagram size definition-string
- eg: \\markup \\fret-diagram #0.75 #\"6-x;5-x;4-o;3-2;2-3;1-2;\"
- for fret spacing 3/4 of staff space, D chord diagram
- Syntax rules for @var{definition-string}:
- Diagram items are separated by semicolons.
-
- Possible items:
-@table @code
-@item t:number
- set the line thickness (in staff spaces). Default 0.05
-@item h:number
- set the height of the diagram in frets. Default 4
-@item w:number
- set the width of the diagram in strings. Default 6
-@item f:number
- set fingering label type
- (0 = none, 1 = in circle on string, 2 = below string) Default 0
-@item d:number
- set radius of dot, in terms of fret spacing. Default 0.25
-@item p:number
- set the position of the dot in the fret space. 0.5 is centered; 1 is on lower fret bar,
- 0 is on upper fret bar. Default 0.6
- @item c:string1-string2-fret
- include a barre mark from string1 to string2 on fret
- @item string-fret
- place a dot on string at fret. If fret is o, string is identified
- as open. If fret is x, string is identified as muted.
-@item string-fret-fingering
- place a dot on string at fret, and label with fingering as
- defined by f: code.
-@end table
-
- Note: There is no limit to the number of fret indications per string."
- (set! props (acons 'size size props))
- (let ((definition-list (parse-definition-string props definition-string)))
- (make-fret-diagram paper (car definition-list) (cdr definition-list))))
-
-(define (parse-definition-string props definition-string)
- "parse a fret diagram string and return a pair containing:
- props, modified as necessary by the definition-string
- a fret-indication list with the appropriate values"
- (let* ((fret-count 4)
- (string-count 6)
- (thickness 0.05)
- (finger-code 0)
- (dot-size 0.25)
- (dot-position 0.6)
- (fret-range (list 1 fret-count))
- (barre-list '())
- (dot-list '())
- (xo-list '())
- (output-list '())
- (items (string-split definition-string #\;)))
- (let parse-item ((myitems items))
- (if (not (null? (cdr myitems)))
- (let ((test-string (car myitems)))
- (case (car (string->list (substring test-string 0 1)))
- ((#\f) (let* ((finger-code (get-numeric-from-key test-string))
- (finger-id (case finger-code
- ((0) 'none)
- ((1) 'white-circled)
- ((2) 'below-string))))
- (set! props
- (acons 'finger-code finger-id props))))
- ((#\t) (let ((thickness (get-numeric-from-key test-string)))
- (set! props (acons 'thickness thickness props))))
- ((#\c) (set! output-list (cons-fret (cons 'barre (numerify (string-split (substring test-string 2) #\-)))
- output-list)))
- ((#\h) (let ((fret-count (get-numeric-from-key test-string)))
- (set! props (acons 'fret-count fret-count props))))
- ((#\w) (let ((string-count (get-numeric-from-key test-string)))
- (set! props (acons 'string-count string-count props))))
- ((#\d) (let ((dot-size (get-numeric-from-key test-string)))
- (set! props (acons 'dot-radius dot-size props))))
- ((#\p) (let ((dot-position (get-numeric-from-key test-string)))
- (set! props (acons 'dot-position dot-position props))))
- (else
- (let ((this-list (string-split test-string #\-)))
- (if (string->number (cadr this-list))
- (set! output-list (cons-fret (cons 'place-fret (numerify this-list)) output-list))
- (if (equal? (cadr this-list) "x" )
- (set! output-list (cons-fret (list 'mute (string->number (car this-list))) output-list))
- (set! output-list (cons-fret (list 'open (string->number (car this-list))) output-list)))))))
- (parse-item (cdr myitems)))))
- `((,props) . ,output-list)))
-
-(define (cons-fret new-value old-list)
-" Put together a fret-list in the format desired by parse-string "
- (if (eq? old-list '())
- (list new-value)
- (cons* new-value old-list)))
-
-(define (get-numeric-from-key keystring)
- "Get the numeric value from a key of the form k:val"
- (string->number (substring keystring 2 (string-length keystring) )))
-
-(define (numerify mylist)
- "Convert string values to numeric or character"
- (if (null? mylist)
- '()
- (let ((numeric-value (string->number (car mylist))))
- (if numeric-value
- (cons* numeric-value (numerify (cdr mylist)))
- (cons* (car (string->list (car mylist))) (numerify (cdr mylist)))))))
-
+;;;; fret-diagrams.scm -- \r
+;;;;\r
+;;;; source file of the GNU LilyPond music typesetter\r
+;;;; \r
+;;;; (c) 2004 Carl D. Sorensen <c_sorensen@byu.edu>\r
+\r
+(define ly:paper-lookup ly:output-def-lookup) ; compat for 2.3, remove when using 2.2\r
+(define fontify-text-white fontify-text) ; temporary until fontify-text-white works properly (see draw-dots for usage)\r
+\r
+;;TODO -- Change font interface from name, magnification to family, weight, size\r
+; Right now, using the desired interface gives an error, so we use name, magnification\r
+\r
+(define (fret-parse-marking-list marking-list fret-count)\r
+ (let* ((fret-range (list 1 fret-count))\r
+ (barre-list '())\r
+ (dot-list '())\r
+ (xo-list '())\r
+ (output-alist '()))\r
+ (let parse-item ((mylist marking-list))\r
+ (if (not (null? mylist))\r
+ (let* ((my-item (car mylist)) (my-code (car my-item)))\r
+ (cond\r
+ ((or (eq? my-code 'open)(eq? my-code 'mute))\r
+ (set! xo-list (cons* my-item xo-list)))\r
+ ((eq? my-code 'barre)\r
+ (set! barre-list (cons* (cdr my-item) barre-list)))\r
+ ((eq? my-code 'place-fret)\r
+ (set! dot-list (cons* (cdr my-item) dot-list))))\r
+ (parse-item (cdr mylist)))))\r
+ ; calculate fret-range\r
+ (let ((maxfret 0) (minfret 99))\r
+ (let updatemax ((fret-list dot-list))\r
+ (if (null? fret-list)\r
+ '()\r
+ (let ((fretval (second (car fret-list))))\r
+ (if (> fretval maxfret) (set! maxfret fretval))\r
+ (if (< fretval minfret) (set! minfret fretval))\r
+ (updatemax (cdr fret-list)))))\r
+ (if (> maxfret fret-count)\r
+ (set! fret-range (list minfret\r
+ (let ((upfret (- (+ minfret fret-count) 1)))\r
+ (if (> maxfret upfret) maxfret upfret)))))\r
+ ; subtract fret from dots\r
+ (set! dot-list (subtract-base-fret (- (car fret-range) 1) dot-list)))\r
+ (acons 'fret-range fret-range\r
+ (acons 'barre-list barre-list\r
+ (acons 'dot-list dot-list\r
+ (acons 'xo-list xo-list '()))))))\r
+ \r
+(define (subtract-base-fret base-fret dot-list)\r
+"Subtract @var{base-fret} from every fret in @var{dot-list}" \r
+ (if (null? dot-list)\r
+ '()\r
+ (let ((this-list (car dot-list)))\r
+ (cons* (list (car this-list) (- (second this-list) base-fret) (if (null? (cddr this-list))\r
+ '()\r
+ (third this-list)))\r
+ (subtract-base-fret base-fret (cdr dot-list))))))\r
+\r
+(define (draw-strings string-count fret-range th size)\r
+"Draw the strings (vertical lines) for a fret diagram with @var{string-count} strings and frets as indicated\r
+ in @var{fret-range}. Line thickness is given by @var{th}, fret & string spacing by @var{size}. "\r
+ (let* ((fret-count (+ (- (cadr fret-range) (car fret-range)) 1))\r
+ (sl (* (+ fret-count 1) size))\r
+ (sth (* size th))\r
+ (half-thickness (* sth 0.5))\r
+ (gap (- size sth))\r
+ (string-stencil (ly:make-stencil (list 'draw-line sth 0 0 0 sl)\r
+ (cons (- half-thickness) half-thickness)\r
+ (cons (- half-thickness) (+ sl half-thickness)))))\r
+ (if (= string-count 1)\r
+ string-stencil\r
+ (ly:stencil-combine-at-edge\r
+ (draw-strings (- string-count 1) fret-range th size) X RIGHT\r
+ string-stencil\r
+ gap 0))))\r
+\r
+(define (draw-fret-lines fret-count string-count th size)\r
+ "Draw @var{fret-count} frets (horizontal lines) for a fret diagram with @var{string-count} strings.\r
+ Line thickness is given by @var{th}, fret & string spacing by @var{size}. "\r
+ (let* ((fret-length (* (- string-count 1) size))\r
+ (sth (* size th))\r
+ (half-thickness (* sth 0.5))\r
+ (gap (- size sth))\r
+ (fret-line (ly:make-stencil (list 'draw-line sth half-thickness size (- fret-length half-thickness) size)\r
+ (cons 0 fret-length)\r
+ (cons (- size half-thickness) (+ size half-thickness)))))\r
+ (if (= fret-count 1)\r
+ fret-line\r
+ (ly:stencil-combine-at-edge fret-line Y UP\r
+ (draw-fret-lines (- fret-count 1) string-count th size)\r
+ gap 0))))\r
+ \r
+(define (draw-thick-top-fret props string-count th size)\r
+ "Draw a thick top fret for a fret diagram whose base fret is not 1."\r
+ (let* ((sth (* th size))\r
+ (top-fret-thick (* sth (chain-assoc-get 'top-fret-thickness props 3.0)))\r
+ (top-half-thick (* top-fret-thick 0.5))\r
+ (half-thick (* sth 0.5))\r
+ (x1 half-thick)\r
+ (x2 (+ half-thick (* size (- string-count 1))))\r
+ (y1 0)\r
+ (y2 top-fret-thick)\r
+ (x-extent (cons (- x1) x2))\r
+ (y-extent (cons 0 y2)))\r
+ (ly:make-stencil (list 'round-filled-box x1 x2 y1 y2 th)\r
+ x-extent y-extent))) \r
+ \r
+ \r
+(define (draw-frets paper props fret-range string-count th size)\r
+ "Draw the frets (horizontal lines) for a fret diagram with @var{string-count} strings and frets as indicated\r
+ in @var{fret-range}. Line thickness is given by @var{th}, fret & string spacing by @var{size}. "\r
+ (let* ((top-fret-thick (* th (chain-assoc-get 'top-fret-thickness props 3.0)))\r
+ (fret-count (+ (- (cadr fret-range) (car fret-range)) 1))\r
+ (fret-length (* (- string-count 1) size))\r
+ (half-thickness (* th 0.5))\r
+ (base-fret (car fret-range)))\r
+ (ly:stencil-combine-at-edge\r
+ (draw-fret-lines fret-count string-count th size) Y UP\r
+ (if (= base-fret 1)\r
+ (draw-thick-top-fret props string-count th size)\r
+ (draw-fret-lines 1 string-count th size)) \r
+ (- size th) 0))) \r
+ \r
+\r
+(define (centered-text-stencil procedure font text)\r
+"Create a centered text stencil of @var{text} in font @var{font} using stencil creation procedure @var{procedure}"\r
+;UGH -- version check is necessary because 2.3 is not available on cygwin, so CDS development\r
+; needs 2.2 compatible ly:stencil-align-to!\r
+; Once 2.3 is built on cygwin, version check can go (fret-diagrams.scm is not part of dist for 2.2)\r
+(let* ((text-stencil (procedure font text)))\r
+ (if (= (cadr (ly:version)) 3)\r
+ (begin\r
+ (ly:stencil-align-to! text-stencil Y 0)\r
+ (ly:stencil-align-to! text-stencil X 0)\r
+ text-stencil)\r
+ (ly:stencil-align-to (ly:stencil-align-to text-stencil X 0) Y 0))))\r
+\r
+(define (draw-dots paper props string-count fret-range size finger-code dot-circle-font-mag dot-position dot-radius dot-list)\r
+ "Make dots for fret diagram."\r
+;TODO -- move away from name,magnification font spec to family, size\r
+; Note -- family, size doesn't work with fontify-text procedure; need to fix that before we can make the switch\r
+ (let* ((scale-dot-radius (* size dot-radius))\r
+ (dot-color (chain-assoc-get 'dot-color props 'black))\r
+ (finger-xoffset (chain-assoc-get 'finger-xoffset props -0.25))\r
+ (finger-yoffset (chain-assoc-get 'finger-yoffset props (- size)))\r
+;part of deprecated font interface \r
+ (label-font-name (chain-assoc-get 'label-font-name props "cmss8"))\r
+ (white-dot-font-mag (* scale-dot-radius (chain-assoc-get 'white-dot-font-mag props 1.8))) \r
+ (dot-label-font-mag (* scale-dot-radius (chain-assoc-get 'dot-label-font-mag props 1.2)))\r
+ (string-label-font-mag (* size (chain-assoc-get 'string-label-font-mag props 0.6)))\r
+ (fret-count (+ (- (cadr fret-range) (car fret-range) 1)))\r
+ (mypair (car dot-list))\r
+ (restlist (cdr dot-list))\r
+ (xpos (* size (- string-count (car mypair))))\r
+;TODO -- figure out what 4 is and get rid of it\r
+;UGH -- 4?\r
+ (ypos (* size (+ 4 (- fret-count (cadr mypair) dot-position ))))\r
+ (extent (cons (- scale-dot-radius) scale-dot-radius))\r
+ (finger (caddr mypair))\r
+ (finger (if (number? finger) (number->string finger) finger))\r
+; desired font interface\r
+ (string-label-font (ly:paper-get-font paper `(((font-family . sans)(font-encoding . latin1)(font-series . medium) (font-shape . upright)\r
+ (font-size . ,(stepmag (* size string-label-font-mag)))))))\r
+; deprecated font interface\r
+; (string-label-font (ly:paper-get-font paper `(((font-magnification . ,string-label-font-mag)\r
+; (font-name . ,label-font-name)))))\r
+; desired font interface\r
+ (dot-label-font (ly:paper-get-font paper `(((font-family . sans)(font-encoding . latin1)(font-series . medium) (font-shape . upright)\r
+ (font-size . ,(stepmag (* size dot-label-font-mag)))))))\r
+; deprecated font interface\r
+; (dot-label-font (ly:paper-get-text-font paper `(((font-magnification . ,dot-label-font-mag)\r
+; (font-name . ,label-font-name)))))\r
+; desired font interface\r
+ (dot-circle-font (ly:paper-get-font paper `(((font-family . sans)(font-encoding . latin1)(font-series . medium) (font-shape . upright)\r
+ (font-size . ,(stepmag (* size dot-circle-font-mag)))))))\r
+; deprecated font interface\r
+; (dot-circle-font (ly:paper-get-font paper `(((font-magnification . ,dot-circle-font-mag)\r
+; (font-name . ,label-font-name)))))\r
+; deprecated font interface\r
+ (white-dot-font (ly:paper-get-font paper `(((font-magnification . ,white-dot-font-mag)\r
+ (font-name . ,label-font-name)))))\r
+ (dotstencil (if (eq? dot-color 'white)\r
+ (begin\r
+ (ly:make-stencil (list 'white-dot 0 0 scale-dot-radius) extent extent))\r
+ (ly:make-stencil (list 'dot 0 0 scale-dot-radius ) extent extent)))\r
+ (positioned-dot (ly:stencil-translate-axis\r
+ (ly:stencil-translate-axis dotstencil xpos X)\r
+ ypos Y))\r
+ (labeled-dot-stencil \r
+ (if (or (eq? finger '())(eq? finger-code 'none))\r
+ positioned-dot\r
+ (if (eq? finger-code 'in-dot)\r
+ (let* ((dot-proc (if (eq? dot-color 'white) 'white-dot 'dot))\r
+ (text-proc (if (eq? dot-color 'white) fontify-text fontify-text-white)))\r
+ (ly:stencil-add \r
+ (ly:stencil-translate-axis \r
+ (ly:stencil-translate-axis \r
+ (centered-text-stencil text-proc dot-label-font finger) xpos X)\r
+ ypos Y)\r
+ (ly:stencil-translate-axis\r
+ (ly:stencil-translate-axis \r
+ (ly:make-stencil (list dot-proc 0 0 scale-dot-radius) extent extent)\r
+ xpos X)\r
+ ypos Y)))\r
+ (if (eq? finger-code 'below-string) \r
+ (ly:stencil-add \r
+ positioned-dot\r
+ (ly:stencil-translate-axis \r
+ (ly:stencil-translate-axis \r
+ (centered-text-stencil fontify-text string-label-font finger) xpos X)\r
+ (* size finger-yoffset) Y))\r
+ ;unknown finger-code\r
+ positioned-dot)))))\r
+ (if (null? restlist) \r
+ labeled-dot-stencil\r
+ (ly:stencil-add \r
+ (draw-dots paper props string-count fret-range size finger-code dot-circle-font-mag\r
+ dot-position dot-radius restlist)\r
+ labeled-dot-stencil))))\r
+\r
+(define (draw-xo paper props string-count fret-range size xo-list) \r
+"Put open and mute string indications on diagram, as contained in @var{xo-list}."\r
+;TODO -- Move away from name,mag font spec to family, size\r
+ (let* ((fret-count (+ (- (cadr fret-range) (car fret-range) 1)))\r
+ (xo-font-mag (* size (chain-assoc-get 'xo-font-magnification props 0.5)))\r
+ (xo-font-name (chain-assoc-get 'xo-font-name props "cmss8"))\r
+ (xo-horizontal-offset (* size (chain-assoc-get 'xo-horizontal-offset props -0.35)))\r
+; desired font interface\r
+; (font (ly:paper-get-font paper `(((font-family . sans)(font-series . medium) (font-shape . upright)\r
+; (font-size . ,(stepmag (* size xo-font-mag)))))))\r
+; deprecated font interface\r
+ (font (ly:paper-get-font paper `(((font-magnification . ,xo-font-mag)\r
+ (font-name . ,xo-font-name)))))\r
+ (mypair (car xo-list))\r
+ (restlist (cdr xo-list))\r
+ (glyph-string (if (eq? (car mypair) 'mute) "X" "O"))\r
+ (xpos (+ (* (- string-count (cadr mypair)) size) xo-horizontal-offset ))\r
+ (glyph-stencil (ly:stencil-translate-axis (fontify-text font glyph-string) xpos X)))\r
+ (if (null? restlist)\r
+ glyph-stencil\r
+ (ly:stencil-add\r
+ (draw-xo paper props string-count fret-range size restlist)\r
+ glyph-stencil))))\r
+\r
+(define (make-bezier-sandwich-list left right bottom height thickness)\r
+" Make the argument list for a horizontal bezier sandwich from @var{left} to @var{right} with a bottom at @var{bottom}, \r
+ a height of @var{height}, and a thickness of @var{thickness}."\r
+ (let* ((width (+ (- right left) 1))\r
+ (x1 (+ (* width thickness) left))\r
+ (x2 (- right (* width thickness)))\r
+ (bottom-control-point-height (+ bottom (- height thickness)))\r
+ (top-control-point-height (+ bottom height)))\r
+ ; order of points is: left cp low, right cp low, right end low, left end low\r
+ ; right cp high, left cp high, left end high, right end high.\r
+ (list (cons x1 bottom-control-point-height) (cons x2 bottom-control-point-height) (cons right bottom) (cons left bottom)\r
+ (cons x2 top-control-point-height) (cons x1 top-control-point-height) (cons left bottom) (cons right bottom))))\r
+\r
+(define (draw-barre paper props string-count fret-range size finger-code dot-circle-font-mag dot-position dot-radius barre-list)\r
+ "Create barre indications for a fret diagram"\r
+ (if (not (null? barre-list))\r
+ (let* ((string1 (caar barre-list))\r
+ (string2 (cadar barre-list))\r
+ (fret (caddar barre-list))\r
+ (barre-vertical-offset (chain-assoc-get 'barre-vertical-offset props 0.5))\r
+ ; 2 is 1 for empty fret at bottom of figure + 1 for interval (top-fret - fret + 1) -- not an arbitrary constant\r
+ (bottom (+ (* size (- (+ 2 (- (cadr fret-range) fret))dot-position) ) (* size barre-vertical-offset dot-radius)))\r
+ (left (* size (- string-count string1)))\r
+ (right (* size (- string-count string2)))\r
+ (bezier-thick (chain-assoc-get 'bezier-thickness props 0.1))\r
+ (bezier-height (chain-assoc-get 'bezier-height props 0.5))\r
+ (bezier-list (make-bezier-sandwich-list left right bottom (* size bezier-height) (* size bezier-thick)))\r
+ (sandwich-stencil (ly:make-stencil (list 'bezier-sandwich `(quote ,bezier-list) (* size bezier-thick) )\r
+ (cons 0 right)\r
+ (cons 0 (+ bottom (* size bezier-height))))))\r
+ (if (not (null? (cdr barre-list)))\r
+ (ly:stencil-add sandwich-stencil\r
+ (draw-barre paper props string-count fret-range size finger-code dot-circle-font-mag\r
+ dot-position dot-radius (cdr barre-list)))\r
+ sandwich-stencil ))))\r
+\r
+ \r
+(define (stepmag mag)\r
+"Calculate the font step necessary to get a desired magnification"\r
+(* 6 (/ (log mag) (log 2))))\r
+\r
+(define (label-fret paper props string-count fret-range size)\r
+ "Label the base fret on a fret diagram"\r
+;TODO -- move away from name,magnification font spec to family, size\r
+ (let* ((base-fret (car fret-range))\r
+ (label-font-mag (chain-assoc-get 'fret-label-font-magnification props 0.7))\r
+; (label-horizontal-offset (chain-assoc-get 'fret-label-horizontal-offset props -0.5))\r
+ (label-vertical-offset (chain-assoc-get 'fret-label-vertical-offset props -0.2))\r
+ (fret-count (+ (- (cadr fret-range) (car fret-range)) 1))\r
+; desired font interface\r
+; (font (ly:paper-get-font paper `(((font-family . sans)(font-series . medium) (font-shape . upright)\r
+; (font-size . ,(stepmag (* size label-font-mag))))))))\r
+; deprecated font interface\r
+ (font (ly:paper-get-font paper `(((font-magnification . ,label-font-mag)\r
+ (font-name . "cmss8")))))) \r
+ (ly:stencil-translate-axis (fontify-text font (format #f "~(~:@r~)" base-fret)) \r
+ (* size (+ fret-count label-vertical-offset)) Y)))\r
+ \r
+(def-markup-command (fret-diagram-verbose paper props marking-list)\r
+ (list?)\r
+;TODO -- put table in doc string\r
+ "Make a fret diagram containing the symbols indicated in @var{marking-list}\r
+ \r
+ Syntax: \\fret-diagram marking-list\r
+ \r
+ For example,\r
+ \r
+ @verbatim\r
+ \\markup \\fret-diagram #'((mute 6) (mute 5) (open 4) (place-fret 3 2) (place-fret 2 3) (place-fret 1 2))\r
+ @end verbatim \r
+ \r
+ will produce a standard D chord diagram without fingering indications.\r
+ \r
+Possible elements in @var{marking-list}:\r
+@table @asis\r
+@item (mute string-number)\r
+Place a small 'x' at the top of string @var{string-number\r
+\r
+@item (open string-number)\r
+Place a small 'o' at the top of string @var{string-number\r
+\r
+@item (barre start-string end-string fret-number)\r
+Place a barre indicator (much like a tie) from string @var{start-string}to string @var{end-string} at fret @var{fret-number}\r
+\r
+@item (place-fret string-number fret-number finger-value)\r
+Place a fret playing indication on string @var{string-number} at fret @var{fret-number} with an optional \r
+fingering label @var{finger-value. By default, the fret playing indicator is a solid dot. This can be\r
+changed by setting the value of the variable @var(dot-color). If the @var{finger} \r
+part of the place-fret element is present, @var{finger-value} will be displayed according to the setting of the variable\r
+@var{finger-code}. There is no limit to the number of fret indications per string.\r
+@end table"\r
+ (make-fret-diagram paper props marking-list))\r
+ \r
+(define (make-fret-diagram paper props marking-list)\r
+" Make a fret diagram markup"\r
+ (let* (\r
+ ; note: here we get items from props that are needed in this routine, or that are needed in more than one\r
+ ; of the procedures called from this routine. If they're only used in one of the sub-procedure, they're \r
+ ; obtained in that procedure\r
+ \r
+ (size (chain-assoc-get 'size props 1.0)) ; needed for everything\r
+;TODO -- get string-count directly from length of stringTunings; requires FretDiagram engraver, which is not yet available\r
+;TODO -- adjust padding for fret label? it appears to be too close to dots\r
+ (string-count (chain-assoc-get 'string-count props 6)) ; needed for everything\r
+ (fret-count (chain-assoc-get 'fret-count props 4)) ; needed for everything\r
+ (dot-position (chain-assoc-get 'dot-position props 0.6)) ; needed for both draw-dots and draw-barre\r
+ (dot-radius (chain-assoc-get 'dot-radius props 0.25)) ; needed for both draw-dots and draw-barre\r
+ (finger-code (chain-assoc-get 'finger-code props 'none)) ; needed for both draw-dots and draw-barre\r
+ (dot-circle-font-mag (* size (chain-assoc-get 'dot-circle-font-mag props .75))) ; needed for both draw-dots and draw-barre\r
+ (th (* (ly:paper-lookup paper 'linethickness)\r
+ (chain-assoc-get 'thickness props 0.5))) ; needed for both draw-frets and draw-strings\r
+ \r
+ (alignment (chain-assoc-get 'alignment props -0.4)) ; needed only here\r
+ (xo-padding (* th (chain-assoc-get 'xo-padding props 2))) ; needed only here\r
+\r
+ (parameters (fret-parse-marking-list marking-list fret-count))\r
+ (dot-list (cdr (assoc 'dot-list parameters)))\r
+ (xo-list (cdr (assoc 'xo-list parameters)))\r
+ (fret-range (cdr (assoc 'fret-range parameters)))\r
+ (barre-list (cdr (assoc 'barre-list parameters)))\r
+ (fret-diagram-stencil (ly:stencil-add\r
+ (draw-strings string-count fret-range th size)\r
+ (draw-frets paper props fret-range string-count th size))))\r
+ (if (not (null? barre-list))\r
+ (set! fret-diagram-stencil (ly:stencil-add\r
+ (draw-barre paper props string-count fret-range size finger-code dot-circle-font-mag \r
+ dot-position dot-radius barre-list)\r
+ fret-diagram-stencil)))\r
+ (if (not (null? dot-list))\r
+ (set! fret-diagram-stencil (ly:stencil-add\r
+ (draw-dots paper props string-count fret-range size finger-code dot-circle-font-mag\r
+ dot-position dot-radius dot-list)\r
+ fret-diagram-stencil)))\r
+ (if (not (null? xo-list))\r
+ (set! fret-diagram-stencil (ly:stencil-combine-at-edge\r
+ fret-diagram-stencil Y UP\r
+ (draw-xo paper props string-count fret-range size xo-list) xo-padding 0)))\r
+ (if (> (car fret-range) 1) \r
+ (set! fret-diagram-stencil\r
+ (ly:stencil-combine-at-edge fret-diagram-stencil X RIGHT\r
+ (label-fret paper props string-count fret-range size) 0 0)))\r
+ (ly:stencil-align-to! fret-diagram-stencil X alignment)\r
+ fret-diagram-stencil))\r
+ \r
+(def-markup-command (fret-diagram paper props definition-string)\r
+ (string?)\r
+;TODO -- put table in doc string\r
+ "Syntax: \\fret-diagram definition-string\r
+ \r
+eg: \\markup \\fret-diagram #\"s:0.75;6-x;5-x;4-o;3-2;2-3;1-2;\"\r
+\r
+for fret spacing 3/4 of staff space, D chord diagram\r
+\r
+Syntax rules for @var{definition-string}:\r
+@itemize @minus\r
+ \r
+@item\r
+Diagram items are separated by semicolons.\r
+\r
+@item\r
+Possible items:\r
+\r
+@itemize @bullet\r
+@item\r
+s:number -- set the fret spacing of the diagram (in staff spaces). Default 1\r
+\r
+@item\r
+t:number -- set the line thickness (in staff spaces). Default 0.05\r
+\r
+@item\r
+h:number -- set the height of the diagram in frets. Default 4\r
+\r
+@item\r
+w:number -- set the width of the diagram in strings. Default 6\r
+\r
+@item\r
+f:number -- set fingering label type (0 = none, 1 = in circle on string, 2 = below string) Default 0\r
+\r
+@item\r
+d:number -- set radius of dot, in terms of fret spacing. Default 0.25\r
+\r
+@item\r
+p:number -- set the position of the dot in the fret space. 0.5 is centered; 1 is on lower fret bar,\r
+0 is on upper fret bar. Default 0.6 \r
+\r
+@item\r
+c:string1-string2-fret -- include a barre mark from string1 to string2 on fret\r
+ \r
+@item\r
+string-fret -- place a dot on string at fret. If fret is o, string is identified\r
+as open. If fret is x, string is identified as muted.\r
+\r
+@item\r
+string-fret-fingering -- place a dot on string at fret, and label with fingering as \r
+defined by f: code.\r
+\r
+@end itemize\r
+\r
+@item\r
+Note: There is no limit to the number of fret indications per string.\r
+#end itemize"\r
+ \r
+; (define new-props (acons 'size size '()))\r
+; (set! props (cons new-props props))\r
+ (let ((definition-list (fret-parse-definition-string props definition-string)))\r
+ (make-fret-diagram paper (car definition-list) (cdr definition-list))))\r
+\r
+(define (fret-parse-definition-string props definition-string)\r
+ "parse a fret diagram string and return a pair containing:\r
+ props, modified as necessary by the definition-string\r
+ a fret-indication list with the appropriate values"\r
+ (let* ((fret-count 4)\r
+ (string-count 6)\r
+ ; (thickness 0.05)\r
+ ; (finger-code 0)\r
+ ; (dot-size 0.25)\r
+ ; (dot-position 0.6)\r
+ (fret-range (list 1 fret-count))\r
+ (barre-list '())\r
+ (dot-list '())\r
+ (xo-list '())\r
+ (output-list '())\r
+ (new-props '())\r
+ (items (string-split definition-string #\;)))\r
+ (let parse-item ((myitems items))\r
+ (if (not (null? (cdr myitems))) \r
+ (let ((test-string (car myitems)))\r
+ (case (car (string->list (substring test-string 0 1))) \r
+ ((#\s) (let ((size (get-numeric-from-key test-string)))\r
+ (set! new-props (acons 'size size new-props))))\r
+ ((#\f) (let* ((finger-code (get-numeric-from-key test-string))\r
+ (finger-id (case finger-code\r
+ ((0) 'none)\r
+ ((1) 'in-dot) \r
+ ((2) 'below-string))))\r
+ (set! new-props\r
+ (acons 'finger-code finger-id new-props))))\r
+ ((#\c) (set! output-list (cons-fret (cons 'barre (numerify (string-split (substring test-string 2) #\-)))\r
+ output-list)))\r
+ ((#\h) (let ((fret-count (get-numeric-from-key test-string)))\r
+ (set! new-props (acons 'fret-count fret-count new-props))))\r
+ ((#\w) (let ((string-count (get-numeric-from-key test-string)))\r
+ (set! new-props (acons 'string-count string-count new-props))))\r
+ ((#\d) (let ((dot-size (get-numeric-from-key test-string)))\r
+ (set! new-props (acons 'dot-radius dot-size new-props))))\r
+ ((#\p) (let ((dot-position (get-numeric-from-key test-string)))\r
+ (set! new-props (acons 'dot-position dot-position new-props))))\r
+ (else \r
+ (let ((this-list (string-split test-string #\-)))\r
+ (if (string->number (cadr this-list))\r
+ (set! output-list (cons-fret (cons 'place-fret (numerify this-list)) output-list))\r
+ (if (equal? (cadr this-list) "x" )\r
+ (set! output-list (cons-fret (list 'mute (string->number (car this-list))) output-list))\r
+ (set! output-list (cons-fret (list 'open (string->number (car this-list))) output-list)))))))\r
+ (parse-item (cdr myitems)))))\r
+ (if (eq? new-props '())\r
+ `(,props . ,output-list)\r
+ `(,(cons new-props props) . ,output-list))))\r
+\r
+(define (cons-fret new-value old-list)\r
+" Put together a fret-list in the format desired by parse-string "\r
+ (if (eq? old-list '())\r
+ (list new-value)\r
+ (cons* new-value old-list)))\r
+ \r
+(define (get-numeric-from-key keystring)\r
+ "Get the numeric value from a key of the form k:val"\r
+ (string->number (substring keystring 2 (string-length keystring) )))\r
+ \r
+(define (numerify mylist)\r
+ "Convert string values to numeric or character"\r
+ (if (null? mylist)\r
+ '()\r
+ (let ((numeric-value (string->number (car mylist))))\r
+ (if numeric-value\r
+ (cons* numeric-value (numerify (cdr mylist)))\r
+ (cons* (car (string->list (car mylist))) (numerify (cdr mylist)))))))\r
+ \r
+(def-markup-command (fret-diagram-terse paper props definition-string)\r
+ (string?)\r
+;TODO -- put table in doc string\r
+ "Make a fret diagram markup using terse string-based syntax.\r
+\r
+Syntax: \\fret-diagram-terse definition-string\r
+\r
+eg: \\markup \\fret-diagram #\"x;x;o;2;3;2;\" for a D chord diagram.\r
+\r
+Syntax rules for @var{definition-string}:\r
+@itemize @bullet\r
+\r
+@item \r
+Strings are terminated by semicolons; the number of semicolons \r
+is the number of strings in the diagram.\r
+\r
+@item\r
+Mute strings are indicated by \"x\".\r
+\r
+@item\r
+Open strings are indicated by \"o\".\r
+\r
+@item\r
+A number indicates a fret indication at that fret.\r
+\r
+@item\r
+If there are multiple fret indicators desired on a string, they\r
+should be separated by spaces.\r
+\r
+@item\r
+Fingerings are given by following the fret number with a \"-\",\r
+followed by the finger indicator, e.g. 3-2 for playing the third\r
+fret with the second finger.\r
+\r
+@item\r
+Where a barre indicator is desired, follow the fret (or fingering) symbol\r
+with \"-(\" to start a barre and \"-)\" to end the barre.\r
+@end itemize"\r
+;TODO -- change syntax to fret\string-finger\r
+ (let ((definition-list (fret-parse-terse-definition-string props definition-string)))\r
+ (make-fret-diagram paper (car definition-list) (cdr definition-list))))\r
+\r
+(define (fret-parse-terse-definition-string props definition-string)\r
+ "parse a fret diagram string that uses terse syntax; return a pair containing:\r
+ props, modified to include the string-count determined by the definition-string\r
+ a fret-indication list with the appropriate values"\r
+;TODO -- change syntax to fret\string-finger\r
+;TODO -- fix bug that doesn't allow multiple indications per string\r
+ (let* ((barre-start-list '())\r
+ (output-list '())\r
+ (new-props '())\r
+ (items (string-split definition-string #\;))\r
+ (string-count (- (length items) 1)))\r
+ (let parse-item ((myitems items))\r
+ (if (not (null? (cdr myitems))) \r
+ (let* ((test-string (car myitems))\r
+ (current-string (- (length myitems) 1))\r
+ (indicators (string-split test-string #\ )))\r
+ (let parse-indicators ((myindicators indicators))\r
+ (if (not (eq? '() myindicators))\r
+ (let* ((this-list (string-split (car myindicators) #\-))\r
+ (max-element-index (- (length this-list) 1))\r
+ (last-element (car (list-tail this-list max-element-index)))\r
+ (fret (if (string->number (car this-list)) (string->number (car this-list)) (car this-list))))\r
+ (if (equal? last-element "(") ; here I add ) to balance parentheses for my editor\r
+ (begin\r
+ (set! barre-start-list (cons-fret (list current-string fret) barre-start-list))\r
+ (set! this-list (list-head this-list max-element-index))))\r
+ (if (equal? last-element ")") ; here I add ( to balance parentheses for my editor\r
+ (let* ((this-barre (get-sub-list fret barre-start-list))\r
+ (insert-index (- (length this-barre) 1)))\r
+ (set! output-list (cons-fret (cons* 'barre (car this-barre) current-string (cdr this-barre)) \r
+ output-list))\r
+ (set! this-list (list-head this-list max-element-index))))\r
+ (if (number? fret)\r
+ (set! output-list (cons-fret (cons* 'place-fret current-string (drop-paren (numerify this-list))) output-list))\r
+ (if (equal? (car this-list) "x" )\r
+ (set! output-list (cons-fret (list 'mute current-string) output-list))\r
+ (set! output-list (cons-fret (list 'open current-string) output-list))))\r
+ (parse-indicators (cdr myindicators)))))\r
+ (parse-item (cdr myitems)))))\r
+ (set! new-props (acons 'string-count string-count new-props))\r
+ \r
+ `(,(cons new-props props) . ,output-list)))\r
+\r
+(define (drop-paren item-list)\r
+" drop a final parentheses from a fret indication list resulting from a terse string specification of barre."\r
+ (if (> (length item-list) 0)\r
+ (let* ((max-index (- (length item-list) 1))\r
+ (last-element (car (list-tail item-list max-index))))\r
+ (if (or (equal? last-element ")") (equal? last-element "("))\r
+ (list-head item-list max-index) \r
+ item-list))\r
+ item-list))\r
+ \r
+(define (get-sub-list value master-list)\r
+" Get a sub-list whose cadr is equal to @var{value} from @var{master-list}"\r
+ (if (eq? master-list '())\r
+ #f\r
+ (let ((sublist (car master-list)))\r
+ (if (equal? (cadr sublist) value)\r
+ sublist\r
+ (get-sub-list value (cdr master-list))))))\r
projects / lilypond.git / commitdiff