;;;;
;;;; (c) 2004--2009 Carl D. Sorensen <c_sorensen@byu.edu>
-(define (fret-parse-marking-list marking-list fret-count)
- (let* ((fret-range (list 1 fret-count))
- (capo-fret 0)
- (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 'capo)
- (set! capo-fret (cadr my-item)))
- ((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 (if (> capo-fret 0) capo-fret 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)))))
- (set! capo-fret (1+ (- capo-fret minfret)))
- ; subtract fret from dots
- (set! dot-list (subtract-base-fret (- (car fret-range) 1) dot-list)))
- (acons 'fret-range fret-range
- (acons 'barre-list barre-list
- (acons 'dot-list dot-list
- (acons 'xo-list xo-list
- (acons 'capo-fret capo-fret '())))))))
+;
+; Utility functions
+;
+;
+
+(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)))))))
+
+(define (stepmag mag)
+ "Calculate the font step necessary to get a desired magnification"
+ (* 6 (/ (log mag) (log 2))))
+
+(define (fret-count fret-range)
+ "Calculate the fret count for the diagram given the range of frets in the diagram."
+ (1+ (- (cdr fret-range) (car fret-range))))
(define (subtract-base-fret base-fret dot-list)
"Subtract @var{base-fret} from every fret in @var{dot-list}"
(third this-list)))
(subtract-base-fret base-fret (cdr dot-list))))))
+(define (make-bezier-sandwich-list start stop base height
+ half-thickness orientation)
+ "Make the argument list for a bezier sandwich from
+string coordinate @var{start} to string-coordinate @var{stop} with a
+baseline at fret coordinate @var{base}, a height of
+@var{height}, and a half thickness of @var{half-thickness}."
+ (let* ((width (+ (- stop start) 1))
+ (cp-left-width (+ (* width half-thickness) start))
+ (cp-right-width (- stop (* width half-thickness)))
+ (bottom-control-point-height
+ (- base (- height half-thickness)))
+ (top-control-point-height
+ (- base height))
+ (left-end-point
+ (stencil-coordinates base start orientation))
+ (right-end-point
+ (stencil-coordinates base stop orientation))
+ (left-upper-control-point
+ (stencil-coordinates
+ top-control-point-height cp-left-width orientation))
+ (left-lower-control-point
+ (stencil-coordinates
+ bottom-control-point-height cp-left-width orientation))
+ (right-upper-control-point
+ (stencil-coordinates
+ top-control-point-height cp-right-width orientation))
+ (right-lower-control-point
+ (stencil-coordinates
+ bottom-control-point-height cp-right-width orientation)))
+ ; order of bezier control 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 left-lower-control-point
+ right-lower-control-point
+ right-end-point
+ left-end-point
+ right-upper-control-point
+ left-upper-control-point
+ left-end-point
+ right-end-point)))
+
+(define (drop-paren item-list)
+ "Drop a final parentheses from a fret indication list
+@code{item-list} resulting from a terse string specification of barre."
+ (if (> (length item-list) 0)
+ (let* ((max-index (- (length item-list) 1))
+ (last-element (car (list-tail item-list max-index))))
+ (if (or (equal? last-element ")") (equal? last-element "("))
+ (list-head item-list max-index)
+ item-list))
+ item-list))
+
+(define (get-sub-list value master-list)
+ "Get a sub-list whose cadr is equal to @var{value} from @var{master-list}"
+ (if (eq? master-list '())
+ #f
+ (let ((sublist (car master-list)))
+ (if (equal? (cadr sublist) value)
+ sublist
+ (get-sub-list value (cdr master-list))))))
+
+(define (merge-details key alist-list . default)
+ "Return @code{alist-list} entries for @code{key}, in one combined alist.
+There can be two @code{alist-list} entries for a given key. The first
+comes from the override-markup function, the second comes
+from property settings during a regular override.
+This is necessary because some details can be set in one
+place, while others are set in the other. Both details
+lists must be merged into a single alist.
+Return @code{default} (optional, else #f) if not
+found."
+
+ (define (helper key alist-list default)
+ (if (null? alist-list)
+ default
+ (let* ((handle (assoc key (car alist-list))))
+ (if (pair? handle)
+ (append (cdr handle) (chain-assoc-get key (cdr alist-list) '()))
+ (helper key (cdr alist-list) default)))))
+
+ (helper key alist-list
+ (if (pair? default) (car default) #f)))
+
+;
+; Conversions between fret/string coordinate system and x-y coordinate
+; system.
+;
+; Fret coordinates are measured down the fretboard from the nut,
+; starting at 0.
+;
+; String coordinates are measured from the lowest string, starting at 0.
+;
+; The x-y origin is at the intersection of the nut and the lowest string.
+;
+; X coordinates are positive to the right.
+; Y coordinates are positive up.
+;
+
+(define (negate-extent extent)
+ "Return the extent in an axis opposite to the axis of @code{extent}."
+ (cons (- (cdr extent)) (- (car extent))))
+
+(define (stencil-fretboard-extent stencil fretboard-axis orientation)
+ "Return the extent of @code{stencil} in the @code{fretboard-axis}
+direction."
+ (if (eq? fretboard-axis 'fret)
+ (cond ((eq? orientation 'landscape)
+ (ly:stencil-extent stencil X))
+ ((eq? orientation 'opposing-landscape)
+ (negate-extent (ly:stencil-extent stencil X)))
+ (else
+ (negate-extent (ly:stencil-extent stencil Y))))
+ ; else -- eq? fretboard-axis 'string
+ (cond ((eq? orientation 'landscape)
+ (ly:stencil-extent stencil Y))
+ ((eq? orientation 'opposing-landscape)
+ (negate-extent (ly:stencil-extent stencil Y)))
+ (else
+ (ly:stencil-extent stencil Y)))))
+
+
+(define (stencil-fretboard-offset stencil fretboard-axis orientation)
+ "Return a the stencil coordinates of the center of @code{stencil}
+in the @code{fretboard-axis} direction."
+ (* 0.5 (interval-length
+ (stencil-fretboard-extent stencil fretboard-axis orientation))))
+
+(define (stencil-coordinates fret-coordinate string-coordinate orientation)
+ "Return a pair @code{(x-coordinate . y-coordinate)} in stencil coordinate
+system."
+ (cond
+ ((eq? orientation 'landscape)
+ (cons fret-coordinate string-coordinate))
+ ((eq? orientation 'opposing-landscape)
+ (cons (- fret-coordinate) (- string-coordinate)))
+ (else
+ (cons string-coordinate (- fret-coordinate)))))
+
+;
+; Functions that create stencils used in the fret diagram
+;
+
(define (sans-serif-stencil layout props mag text)
"Create a stencil in sans-serif font based on @var{layout} and @var{props}
with magnification @var{mag} of the string @var{text}."
(prepend-alist-chain 'font-family 'sans props))))
(interpret-markup layout my-props text)))
-(define (draw-strings string-count fret-range th size orientation)
+
+(define (string-stencil string string-count fret-range
+ th thickness-factor size orientation)
+ "Make a stencil for @code{string}, given the fret-diagram
+overall parameters."
+ (let* ((string-thickness (* th (expt (1+ thickness-factor) string)))
+ (start-coordinates
+ (stencil-coordinates
+ 0
+ (* size (1- string))
+ orientation))
+ (end-coordinates
+ (stencil-coordinates
+ (* size (1+ (fret-count fret-range)))
+ (* size (1- string))
+ orientation)))
+ (make-line-stencil
+ string-thickness
+ (car start-coordinates) (cdr start-coordinates)
+ (car end-coordinates) (cdr end-coordinates))))
+
+(define (fret-stencil fret fret-range string-count th size orientation)
+ "Make a stencil for @code{fret}, given the fret-diagram overall parameters."
+ (let* ((start-coordinates
+ (stencil-coordinates
+ (* size fret)
+ 0
+ orientation))
+ (end-coordinates
+ (stencil-coordinates
+ (* size fret)
+ (* size (1- string-count))
+ orientation)))
+ (make-line-stencil
+ th
+ (car start-coordinates) (cdr start-coordinates)
+ (car end-coordinates) (cdr end-coordinates))))
+
+(define (make-straight-barre-stencil
+ size half-thickness fret-coordinate
+ start-string-coordinate end-string-coordinate orientation)
+ "Create a straight barre stencil."
+ (let ((start-point
+ (stencil-coordinates
+ (* size fret-coordinate)
+ (* size start-string-coordinate)
+ orientation))
+ (end-point
+ (stencil-coordinates
+ (* size fret-coordinate)
+ (* size end-string-coordinate)
+ orientation)))
+ (make-line-stencil
+ half-thickness
+ (car start-point)
+ (cdr start-point)
+ (car end-point)
+ (cdr end-point))))
+
+(define (make-curved-barre-stencil
+ size half-thickness fret-coordinate
+ start-string-coordinate end-string-coordinate orientation)
+ "Create a curved barre stencil."
+ (let* ((bezier-thick 0.1)
+ (bezier-height 0.5)
+ (bezier-list
+ (make-bezier-sandwich-list
+ (* size start-string-coordinate)
+ (* size end-string-coordinate)
+ (* size fret-coordinate)
+ (* size bezier-height)
+ (* size bezier-thick)
+ orientation))
+ (box-lower-left
+ (stencil-coordinates
+ (+ (* size fret-coordinate) half-thickness)
+ (- (* size start-string-coordinate) half-thickness)
+ orientation))
+ (box-upper-right
+ (stencil-coordinates
+ (- (* size fret-coordinate) (* size bezier-height) half-thickness)
+ (+ (* size end-string-coordinate) half-thickness)
+ orientation))
+ (x-extent (cons (car box-lower-left) (car box-upper-right)))
+ (y-extent (cons (cdr box-lower-left) (cdr box-upper-right))))
+ (ly:make-stencil
+ (list 'bezier-sandwich
+ `(quote ,bezier-list)
+ (* size bezier-thick))
+ x-extent
+ y-extent)))
+
+
+;
+;
+; Functions used to draw fret-diagram elements
+;
+;
+
+(define (draw-strings string-count fret-range th
+ thickness-factor size orientation)
"Draw the string 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}. Orientation is determined by @var{orientation}. "
- (let* ((fret-count (+ (- (cadr fret-range) (car fret-range)) 1))
- (sl (* (+ fret-count 1) size))
- (sth (* size th))
- (gap (- size sth))
- (string-stencil
- (if (eq? orientation 'normal)
- (make-line-stencil sth 0 0 0 sl)
- (make-line-stencil sth 0 0 sl 0))))
- (if (= string-count 1)
- string-stencil
- (if (eq? orientation 'normal)
- (ly:stencil-combine-at-edge
- (draw-strings (- string-count 1) fret-range th size orientation)
- X RIGHT
- string-stencil
- gap)
- (ly:stencil-combine-at-edge
- (draw-strings (- string-count 1) fret-range th size orientation)
- Y UP
- string-stencil
- gap)))))
+
+ (define (helper x)
+ (if (null? (cdr x))
+ (string-stencil
+ (car x) string-count fret-range th
+ thickness-factor size orientation)
+ (ly:stencil-add
+ (string-stencil
+ (car x) string-count fret-range th
+ thickness-factor size orientation)
+ (helper (cdr x)))))
+
+ (let* ( (string-list (map 1+ (iota string-count))))
+ (helper string-list)))
(define (draw-fret-lines fret-count string-count th size orientation)
"Draw @var{fret-count} fret lines for a fret diagram
with @var{string-count} strings. Line thickness is given by @var{th},
fret & string spacing by @var{size}. Orientation is given by @var{orientation}"
- (let* ((sth (* size th))
- (gap (- size sth))
- (fret-line (draw-fret-line string-count th size orientation)))
- (if (= fret-count 1)
- fret-line
- (if (eq? orientation 'normal)
- (ly:stencil-combine-at-edge
- (draw-fret-lines
- (- fret-count 1) string-count th size orientation)
- Y UP
- fret-line
- gap 0)
- (ly:stencil-combine-at-edge
- (draw-fret-lines
- (- fret-count 1) string-count th size orientation)
- X RIGHT
- fret-line
- gap 0)))))
-
-(define (draw-fret-line string-count th size orientation)
- "Draw a fret line for a fret diagram."
- (let* ((fret-length (* (- string-count 1) size))
- (sth (* size th))
- (half-thickness (* sth 0.5)))
- (if (eq? orientation 'normal)
- (make-line-stencil sth half-thickness size
- (- fret-length half-thickness) size)
- (make-line-stencil sth 0 half-thickness
- 0 (- fret-length half-thickness)))))
+ (define (helper x)
+ (if (null? (cdr x))
+ (fret-stencil
+ (car x) fret-count string-count th
+ size orientation)
+ (ly:stencil-add
+ (fret-stencil
+ (car x) fret-count string-count th
+ size orientation)
+ (helper (cdr x)))))
+
+ (let* ((fret-list (iota (1+ fret-count))))
+ (helper fret-list)))
(define (draw-thick-zero-fret details string-count th size orientation)
- "Draw a thick zeroth fret for a fret diagram whose base fret is not 1."
+ "Draw a thick zeroth fret for a fret diagram whose base fret is 1."
(let* ((sth (* th size))
+ (half-thick (* 0.5 sth))
(top-fret-thick
- (* sth (assoc-get 'top-fret-thickness details 3.0)))
- (half-thick (* sth 0.5))
- (x1 half-thick)
- (x2 (+ half-thick (* size (- string-count 1))))
- (y1 (- half-thick))
- (y2 (+ top-fret-thick half-thick))
- (x-extent (cons (- x1) x2))
- (y-extent (cons sth top-fret-thick)))
- (if (eq? orientation 'normal)
- (ly:make-stencil (list 'round-filled-box x1 x2 y1 y2 sth)
- x-extent y-extent)
- (ly:make-stencil (list 'round-filled-box y1 y2 x1 x2 sth)
- y-extent x-extent))))
+ (* sth (assoc-get 'top-fret-thickness details 3.0)))
+ (start-string-coordinate (- half-thick))
+ (end-string-coordinate (+ (* size (1- string-count)) half-thick))
+ (start-fret-coordinate half-thick)
+ (end-fret-coordinate (- half-thick top-fret-thick))
+ (lower-left
+ (stencil-coordinates
+ start-fret-coordinate start-string-coordinate orientation))
+ (upper-right
+ (stencil-coordinates
+ end-fret-coordinate end-string-coordinate orientation)))
+ (make-filled-box-stencil
+ (cons (car lower-left) (car upper-right))
+ (cons (cdr lower-left) (cdr upper-right)))))
+
(define (draw-capo details string-count fret fret-count th size
dot-pos orientation)
"Draw a capo indicator across the full width of the fret-board
- at fret capo-fret."
- (let* ((sth (* th size))
- (capo-thick
- (* size (assoc-get 'capo-thickness details 0.5)))
- (half-thick (* capo-thick 0.5))
- (last-string-pos 0)
- (first-string-pos (* size (- string-count 1)))
- (fret-pos ( * size (if (eq? orientation 'normal)
- (+ 2 (- fret-count fret dot-pos))
- (1- (+ dot-pos fret))))))
- (if (eq? orientation 'normal)
- (make-line-stencil capo-thick
- last-string-pos fret-pos first-string-pos fret-pos)
- (make-line-stencil capo-thick
- fret-pos last-string-pos fret-pos first-string-pos))))
-
+at @var{fret}."
+(let* (;(sth (* th size))
+ (capo-thick
+ (* size (assoc-get 'capo-thickness details 0.5)))
+ (half-thick (* capo-thick 0.5))
+ (last-string-pos 0)
+ (first-string-pos (* size (- string-count 1)))
+ (fret-pos ( * size (1- (+ dot-pos fret))))
+ (start-point
+ (stencil-coordinates fret-pos first-string-pos orientation))
+ (end-point
+ (stencil-coordinates fret-pos last-string-pos orientation)))
+ (make-line-stencil
+ capo-thick
+ (car start-point) (cdr start-point)
+ (car end-point) (cdr end-point))))
(define (draw-frets fret-range string-count th size orientation)
"Draw the fret 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}. Orientation is given by @var{orientation}."
- (let* ((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))
- (fret-zero (draw-fret-line string-count th size orientation)))
- (if (eq? orientation 'normal)
- (ly:stencil-combine-at-edge
- (draw-fret-lines fret-count string-count th size orientation)
- Y UP
- fret-zero
- (- size th))
- (ly:stencil-combine-at-edge
- fret-zero X RIGHT
- (draw-fret-lines fret-count string-count th size orientation)
- (- size th)))))
+ (let* ((my-fret-count (fret-count fret-range)))
+ (draw-fret-lines my-fret-count string-count th size orientation)))
(define (draw-dots layout props string-count fret-count
size finger-code
dot-position dot-radius dot-thickness dot-list orientation)
"Make dots for fret diagram."
- (let* ((details (chain-assoc-get 'fret-diagram-details props '()))
+ (let* ((details (merge-details 'fret-diagram-details props '()))
(scale-dot-radius (* size dot-radius))
(scale-dot-thick (* size dot-thickness))
(dot-color (assoc-get 'dot-color details 'black))
- (finger-xoffset -0.25)
- (finger-yoffset (* -0.5 size ))
+ (finger-label-padding 0.3)
(dot-label-font-mag
- (* scale-dot-radius (assoc-get 'dot-label-font-mag details 1.0)))
+ (* scale-dot-radius (assoc-get 'dot-label-font-mag details 1.0)))
(string-label-font-mag
- (* size (assoc-get 'string-label-font-mag details 0.6)))
+ (* size
+ (assoc-get 'string-label-font-mag details
+ (cond ((or (eq? orientation 'landscape)
+ (eq? orientation 'opposing-landscape))
+ 0.5)
+ (else 0.6)))))
(mypair (car dot-list))
(restlist (cdr dot-list))
(string (car mypair))
(fret (cadr mypair))
- (xpos (* size (if (eq? orientation 'normal)
- (- string-count string)
- (+ (- fret 1 ) dot-position))))
- (ypos (* size (if (eq? orientation 'normal)
- (+ 2 (- fret-count fret dot-position ))
- (- string-count string))))
+ (fret-coordinate (* size (+ (1- fret) dot-position)))
+ (string-coordinate (* size (- string-count string)))
+ (dot-coordinates
+ (stencil-coordinates fret-coordinate string-coordinate orientation))
(extent (cons (- scale-dot-radius) scale-dot-radius))
(finger (caddr mypair))
(finger (if (number? finger) (number->string finger) finger))
- (dotstencil (if (eq? dot-color 'white)
- (ly:stencil-add
- (make-circle-stencil
+ (dot-stencil (if (eq? dot-color 'white)
+ (ly:stencil-add
+ (make-circle-stencil
scale-dot-radius scale-dot-thick #t)
- (ly:stencil-in-color
+ (ly:stencil-in-color
(make-circle-stencil
- (- scale-dot-radius (* 0.5 scale-dot-thick))
- 0 #t)
+ (- scale-dot-radius (* 0.5 scale-dot-thick))
+ 0 #t)
1 1 1))
- (make-circle-stencil
- scale-dot-radius scale-dot-thick #t)))
- (positioned-dot (begin
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis dotstencil xpos X)
- ypos Y)))
- (labeled-dot-stencil
- (if (or (eq? finger '())(eq? finger-code 'none))
- positioned-dot
- (if (eq? finger-code 'in-dot)
- (let* ((finger-label
- (centered-stencil
- (sans-serif-stencil
- layout props dot-label-font-mag finger))))
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis
- (ly:stencil-add
- dotstencil
- (if (eq? dot-color 'white)
- finger-label
- (ly:stencil-in-color finger-label 1 1 1)))
- xpos X)
- ypos Y))
- (if (eq? finger-code 'below-string)
- (ly:stencil-add
- positioned-dot
- (if (eq? orientation 'normal)
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis
- (centered-stencil
- (sans-serif-stencil
- layout props string-label-font-mag finger))
- xpos X)
- (* size finger-yoffset) Y)
- (ly:stencil-translate-axis
- (ly:stencil-translate-axis
- (centered-stencil
- (sans-serif-stencil
- layout props string-label-font-mag finger))
- (* size (+ 2 fret-count finger-yoffset)) X)
- ypos Y)))
- ;unknown finger-code
- positioned-dot)))))
+ (make-circle-stencil
+ scale-dot-radius scale-dot-thick #t)))
+ (positioned-dot (translate-stencil dot-stencil dot-coordinates))
+ (labeled-dot-stencil
+ (cond
+ ((or (eq? finger '())(eq? finger-code 'none))
+ positioned-dot)
+ ((eq? finger-code 'in-dot)
+ (let ((finger-label
+ (centered-stencil
+ (sans-serif-stencil
+ layout props dot-label-font-mag finger))))
+ (translate-stencil
+ (ly:stencil-add
+ dot-stencil
+ (if (eq? dot-color 'white)
+ finger-label
+ (ly:stencil-in-color finger-label 1 1 1)))
+ dot-coordinates)))
+ ((eq? finger-code 'below-string)
+ (let* ((label-stencil
+ (centered-stencil
+ (sans-serif-stencil
+ layout props string-label-font-mag
+ finger)))
+ (label-fret-offset
+ (stencil-fretboard-offset
+ label-stencil 'fret orientation))
+ (label-fret-coordinate
+ (+ (* size (+ 1 fret-count finger-label-padding))
+ label-fret-offset))
+ (label-string-coordinate string-coordinate)
+ (label-translation
+ (stencil-coordinates
+ label-fret-coordinate
+ label-string-coordinate
+ orientation)))
+ (ly:stencil-add
+ positioned-dot
+ (translate-stencil label-stencil label-translation))))
+ (else ;unknown finger-code
+ positioned-dot))))
(if (null? restlist)
- labeled-dot-stencil
- (ly:stencil-add
- (draw-dots
+ labeled-dot-stencil
+ (ly:stencil-add
+ (draw-dots
layout props string-count fret-count size finger-code
dot-position dot-radius dot-thickness restlist orientation)
- labeled-dot-stencil))))
+ labeled-dot-stencil))))
-(define (draw-xo layout props string-count fret-range size xo-list orientation)
+(define (draw-xo
+ layout props string-count fret-range size xo-list orientation)
"Put open and mute string indications on diagram, as contained in
@var{xo-list}."
- (let* ((details (chain-assoc-get 'fret-diagram-details props '()))
- (fret-count (+ (- (cadr fret-range) (car fret-range) 1)))
+ (let* ((details (merge-details 'fret-diagram-details props '()))
(xo-font-mag
- (* size (assoc-get 'xo-font-magnification details 0.5)))
- (xo-horizontal-offset (* size -0.35))
+ (* size (assoc-get
+ 'xo-font-magnification details
+ (cond ((or (eq? orientation 'landscape)
+ (eq? orientation 'opposing-landscape))
+ 0.4)
+ (else 0.4)))))
(mypair (car xo-list))
(restlist (cdr xo-list))
(glyph-string (if (eq? (car mypair) 'mute)
- (assoc-get 'mute-string details "X")
- (assoc-get 'open-string details "O")))
- (xpos
- (+ (* (- string-count (cadr mypair)) size) xo-horizontal-offset ))
- (glyph-stencil (if (eq? orientation 'normal)
- (ly:stencil-translate-axis
- (sans-serif-stencil
- layout props (* size xo-font-mag) glyph-string)
- xpos X)
- (ly:stencil-translate-axis
- (sans-serif-stencil
- layout props (* size xo-font-mag) glyph-string)
- xpos Y))))
+ (assoc-get 'mute-string details "X")
+ (assoc-get 'open-string details "O")))
+ (glyph-string-coordinate (* (- string-count (cadr mypair)) size))
+ (glyph-stencil
+ (centered-stencil
+ (sans-serif-stencil
+ layout props (* size xo-font-mag) glyph-string)))
+ (glyph-stencil-coordinates
+ (stencil-coordinates 0 glyph-string-coordinate orientation))
+ (positioned-glyph
+ (translate-stencil glyph-stencil glyph-stencil-coordinates)))
(if (null? restlist)
- glyph-stencil
+ positioned-glyph
(ly:stencil-add
(draw-xo
layout props string-count fret-range size restlist orientation)
- glyph-stencil))))
-
-(define (make-bezier-sandwich-list start stop base height thickness orientation)
- "Make the argument list for a bezier sandwich from
-@var{start} to @var{stop} with a baseline at @var{base}, a height of
-@var{height}, and a thickness of @var{thickness}. If @var{orientation} is
-@var{'normal}, @var{base} is a y coordinate, otherwise it's an x coordinate."
- (let* ((width (+ (- stop start) 1))
- (x1 (+ (* width thickness) start))
- (x2 (- stop (* width thickness)))
- (bottom-control-point-height
- (if (eq? orientation 'normal)
- (+ base (- height thickness))
- (- base (- height thickness))))
- (top-control-point-height
- (if (eq? orientation 'normal)
- (+ base height)
- (- base height))))
- ; order of bezier control 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.
- (if (eq? orientation 'normal)
- (list (cons x1 bottom-control-point-height)
- (cons x2 bottom-control-point-height)
- (cons stop base)
- (cons start base)
- (cons x2 top-control-point-height)
- (cons x1 top-control-point-height)
- (cons start base)
- (cons stop base))
- (list (cons bottom-control-point-height x1)
- (cons bottom-control-point-height x2)
- (cons base stop)
- (cons base start)
- (cons top-control-point-height x2)
- (cons top-control-point-height x1)
- (cons base start)
- (cons base stop)))))
+ positioned-glyph))))
(define (draw-barre layout props string-count fret-range
- size finger-code dot-position dot-radius
- barre-list orientation)
+ size finger-code dot-position dot-radius
+ barre-list orientation)
"Create barre indications for a fret diagram"
(if (not (null? barre-list))
- (let* ((details (chain-assoc-get 'fret-diagram-details props '()))
- (string1 (caar barre-list))
- (string2 (cadar barre-list))
- (fret (caddar barre-list))
- (top-fret (cadr fret-range))
- (low-fret (car fret-range))
- (barre-type (assoc-get 'barre-type details 'curved))
- (scale-dot-radius (* size dot-radius))
- (barre-vertical-offset 0.5)
- ;; 2 is 1 for empty fret at bottom of figure + 1 for interval
- ;; (top-fret - fret + 1) -- not an arbitrary constant
- (dot-center-y
- (* size (- (+ 2 (- (cadr fret-range) fret)) dot-position)))
- (dot-center-fret-coordinate (+ (- fret low-fret) dot-position))
- (barre-fret-coordinate
- (+ dot-center-fret-coordinate
- (* (- barre-vertical-offset 0.5) dot-radius)))
- (barre-start-string-coordinate (- string-count string1))
- (barre-end-string-coordinate (- string-count string2))
- (bottom
- (+ dot-center-y (* barre-vertical-offset scale-dot-radius)))
- (left (* size (- string-count string1)))
- (right (* size (- string-count string2)))
- (bezier-thick 0.1)
- (bezier-height 0.5)
- (bezier-list
- (if (eq? orientation 'normal)
- (make-bezier-sandwich-list
- (* size barre-start-string-coordinate)
- (* size barre-end-string-coordinate)
- (* size (+ 2 (- top-fret
- (+ low-fret barre-fret-coordinate))))
- (* size bezier-height)
- (* size bezier-thick)
- orientation)
- (make-bezier-sandwich-list
- (* size barre-start-string-coordinate)
- (* size barre-end-string-coordinate)
- (* size barre-fret-coordinate)
- (* size bezier-height)
- (* size bezier-thick)
- orientation)))
+ (let* ((details (merge-details 'fret-diagram-details props '()))
+ (string1 (caar barre-list))
+ (string2 (cadar barre-list))
+ (barre-fret (caddar barre-list))
+ (top-fret (cdr fret-range))
+ (low-fret (car fret-range))
+ (fret (1+ (- barre-fret low-fret)))
+ (barre-vertical-offset 0.5)
+ (dot-center-fret-coordinate (+ (1- fret) dot-position))
+ (barre-fret-coordinate
+ (+ dot-center-fret-coordinate
+ (* (- barre-vertical-offset 0.5) dot-radius)))
+ (barre-start-string-coordinate (- string-count string1))
+ (barre-end-string-coordinate (- string-count string2))
+ (scale-dot-radius (* size dot-radius))
+ (barre-type (assoc-get 'barre-type details 'curved))
(barre-stencil
- (if (eq? barre-type 'straight)
- (if (eq? orientation 'normal)
- (make-line-stencil scale-dot-radius left dot-center-y
- right dot-center-y)
- (make-line-stencil scale-dot-radius
- (* size barre-fret-coordinate)
- (* size barre-start-string-coordinate)
- (* size barre-fret-coordinate)
- (* size barre-end-string-coordinate)))
- (if (eq? orientation 'normal)
- (ly:make-stencil
- (list 'bezier-sandwich
- `(quote ,bezier-list)
- (* size bezier-thick))
- (cons left right)
- (cons bottom (+ bottom (* size bezier-height))))
- (ly:make-stencil
- (list 'bezier-sandwich
- `(quote ,bezier-list)
- (* size bezier-thick))
- (cons bottom (+ bottom (* size bezier-height)))
- (cons left right))))))
- (if (not (null? (cdr barre-list)))
+ (cond
+ ((eq? barre-type 'straight)
+ (make-straight-barre-stencil size scale-dot-radius
+ barre-fret-coordinate barre-start-string-coordinate
+ barre-end-string-coordinate orientation))
+ ((eq? barre-type 'curved)
+ (make-curved-barre-stencil size scale-dot-radius
+ barre-fret-coordinate barre-start-string-coordinate
+ barre-end-string-coordinate orientation)))))
+(if (not (null? (cdr barre-list)))
(ly:stencil-add
- barre-stencil
- (draw-barre layout props string-count fret-range size finger-code
- dot-position dot-radius (cdr barre-list)))
+ barre-stencil
+ (draw-barre layout props string-count fret-range size finger-code
+ dot-position dot-radius (cdr barre-list) orientation))
barre-stencil ))))
-(define (stepmag mag)
- "Calculate the font step necessary to get a desired magnification"
- (* 6 (/ (log mag) (log 2))))
-
(define (label-fret layout props string-count fret-range size orientation)
"Label the base fret on a fret diagram"
- (let* ((details (chain-assoc-get 'fret-diagram-details props '()))
- (base-fret (car fret-range))
- (label-font-mag (assoc-get 'fret-label-font-mag details 0.5))
- (label-vertical-offset
- (assoc-get 'fret-label-vertical-offset details -0.2))
- (number-type (assoc-get 'number-type details 'roman-lower))
- (fret-count (+ (- (cadr fret-range) (car fret-range)) 1))
- (label-text
- (cond
- ((equal? number-type 'roman-lower)
- (fancy-format #f "~(~@r~)" base-fret))
- ((equal? number-type 'roman-upper)
- (fancy-format #f "~@r" base-fret))
- ((equal? 'arabic number-type)
- (fancy-format #f "~d" base-fret))
- (else (fancy-format #f "~(~@r~)" base-fret)))))
- (if (eq? orientation 'normal)
- (ly:stencil-translate-axis
- (sans-serif-stencil layout props (* size label-font-mag) label-text)
- (* size (+ fret-count label-vertical-offset)) Y)
- (ly:stencil-translate-axis
- (sans-serif-stencil layout props (* size label-font-mag) label-text)
- (* size (+ 1 label-vertical-offset)) X))))
-
-(define-builtin-markup-command (fret-diagram-verbose layout props marking-list)
+ (let* ((details (merge-details 'fret-diagram-details props '()))
+ (base-fret (car fret-range))
+ (label-font-mag (assoc-get 'fret-label-font-mag details 0.5))
+ (label-space (* 0.5 size))
+ (label-dir (assoc-get 'label-dir details RIGHT))
+ (label-vertical-offset
+ (assoc-get 'fret-label-vertical-offset details 0))
+ (number-type
+ (assoc-get 'number-type details 'roman-lower))
+ (label-text
+ (cond
+ ((equal? number-type 'roman-lower)
+ (fancy-format #f "~(~@r~)" base-fret))
+ ((equal? number-type 'roman-upper)
+ (fancy-format #f "~@r" base-fret))
+ ((equal? 'arabic number-type)
+ (fancy-format #f "~d" base-fret))
+ (else (fancy-format #f "~(~@r~)" base-fret))))
+ (label-stencil
+ (centered-stencil
+ (sans-serif-stencil
+ layout props (* size label-font-mag) label-text)))
+ (label-half-width
+ (stencil-fretboard-offset label-stencil 'string orientation))
+ (label-outside-diagram (+ label-space label-half-width)))
+ (translate-stencil
+ label-stencil
+ (stencil-coordinates
+ (1+ (* size label-vertical-offset))
+ (if (eq? label-dir LEFT)
+ (- label-outside-diagram)
+ (+ (* size (1- string-count)) label-outside-diagram))
+ orientation))))
+
+;;
+;;
+;; markup commands and associated functions
+;;
+;;
+;;
+
+(define (fret-parse-marking-list marking-list my-fret-count)
+ "Parse a fret-diagram-verbose marking list into component sublists"
+ (let* ((fret-range (cons 1 my-fret-count))
+ (capo-fret 0)
+ (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 'capo)
+ (set! capo-fret (cadr my-item)))
+ ((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 (if (> capo-fret 0) capo-fret 99)))
+ (let updatemax ((fret-list dot-list)) ;CHANGE THIS TO HELPER FUNCTION?
+ (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 my-fret-count)
+ (set! fret-range
+ (cons minfret
+ (let ((upfret (- (+ minfret my-fret-count) 1)))
+ (if (> maxfret upfret) maxfret upfret)))))
+ (set! capo-fret (1+ (- capo-fret minfret)))
+ ; subtract fret from dots
+ (set! dot-list (subtract-base-fret (- (car fret-range) 1) dot-list)))
+ (acons 'fret-range fret-range
+ (acons 'barre-list barre-list
+ (acons 'dot-list dot-list
+ (acons 'xo-list xo-list
+ (acons 'capo-fret capo-fret '())))))))
+
+(define (make-fret-diagram layout 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;
+; from FretBoard engraver, but not from markup call
+ (details (merge-details 'fret-diagram-details props '()))
+ (string-count
+ (assoc-get 'string-count details 6)) ; needed for everything
+ (my-fret-count
+ (assoc-get 'fret-count details 4)) ; needed for everything
+ (orientation
+ (assoc-get 'orientation details 'normal)) ; needed for everything
+ (finger-code
+ (assoc-get
+ 'finger-code details 'none)) ; needed for draw-dots and draw-barre
+ (default-dot-radius
+ (if (eq? finger-code 'in-dot) 0.425 0.25)) ; bigger dots if labeled
+ (default-dot-position
+ (if (eq? finger-code 'in-dot)
+ (- 0.95 default-dot-radius)
+ 0.6)) ; move up to make room for bigger if labeled
+ (dot-radius
+ (assoc-get
+ 'dot-radius details default-dot-radius)) ; needed for draw-dots
+ ; and draw-barre
+ (dot-position
+ (assoc-get
+ 'dot-position details default-dot-position)) ; needed for draw-dots
+ ; and draw-barre
+ (th
+ (* (ly:output-def-lookup layout 'line-thickness)
+ (chain-assoc-get 'thickness props 0.5))) ; needed for draw-frets
+ ; and draw-strings
+ (thickness-factor (assoc-get 'string-thickness-factor details 0))
+ (alignment
+ (chain-assoc-get 'align-dir props -0.4)) ; needed only here
+ (xo-padding
+ (* size (assoc-get 'xo-padding details 0.2))) ; needed only here
+ (parameters (fret-parse-marking-list marking-list my-fret-count))
+ (capo-fret (assoc-get 'capo-fret parameters 0))
+ (dot-list (cdr (assoc 'dot-list parameters)))
+ (xo-list (cdr (assoc 'xo-list parameters)))
+ (fret-range (cdr (assoc 'fret-range parameters)))
+ (my-fret-count (fret-count fret-range))
+ (barre-list (cdr (assoc 'barre-list parameters)))
+ (barre-type
+ (assoc-get 'barre-type details 'curved))
+ (fret-diagram-stencil
+ (ly:stencil-add
+ (draw-strings
+ string-count fret-range th thickness-factor size orientation)
+ (draw-frets fret-range string-count th size orientation))))
+ (if (and (not (null? barre-list))
+ (not (eq? 'none barre-type)))
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ (draw-barre layout props string-count fret-range size
+ finger-code dot-position dot-radius
+ barre-list orientation)
+ fret-diagram-stencil)))
+ (if (not (null? dot-list))
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ fret-diagram-stencil
+ (draw-dots layout props string-count my-fret-count
+ size finger-code dot-position dot-radius
+ th dot-list orientation))))
+ (if (= (car fret-range) 1)
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ fret-diagram-stencil
+ (draw-thick-zero-fret
+ details string-count th size orientation))))
+ (if (not (null? xo-list))
+ (let* ((diagram-fret-top
+ (car (stencil-fretboard-extent
+ fret-diagram-stencil
+ 'fret
+ orientation)))
+ (xo-stencil
+ (draw-xo layout props string-count fret-range
+ size xo-list orientation))
+ (xo-fret-offset
+ (stencil-fretboard-offset
+ xo-stencil 'fret orientation)))
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ fret-diagram-stencil
+ (translate-stencil
+ xo-stencil
+ (stencil-coordinates
+ (- diagram-fret-top
+ xo-fret-offset
+ (* size xo-padding))
+ 0 ; no string offset
+ orientation))))))
+
+ (if (> capo-fret 0)
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ fret-diagram-stencil
+ (draw-capo details string-count capo-fret my-fret-count
+ th size dot-position orientation))))
+ (if (> (car fret-range) 1)
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ fret-diagram-stencil
+ (label-fret
+ layout props string-count fret-range size orientation))))
+ (ly:stencil-aligned-to
+ (ly:stencil-aligned-to fret-diagram-stencil X alignment)
+ Y 0)))
+
+(define (fret-parse-definition-string props definition-string)
+ "Parse a fret diagram string and return a pair containing:
+@var{props}, modified as necessary by the definition-string
+a fret-indication list with the appropriate values"
+ (let* ((fret-count 4)
+ (string-count 6)
+ (fret-range (cons 1 fret-count))
+ (barre-list '())
+ (dot-list '())
+ (xo-list '())
+ (output-list '())
+ (new-props '())
+ (details (merge-details 'fret-diagram-details props '()))
+ (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)))
+ ((#\s) (let ((size (get-numeric-from-key test-string)))
+ (set! props (prepend-alist-chain 'size size props))))
+ ((#\f) (let* ((finger-code (get-numeric-from-key test-string))
+ (finger-id (case finger-code
+ ((0) 'none)
+ ((1) 'in-dot)
+ ((2) 'below-string))))
+ (set! details
+ (acons 'finger-code finger-id details))))
+ ((#\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! details
+ (acons 'fret-count fret-count details))))
+ ((#\w) (let ((string-count (get-numeric-from-key test-string)))
+ (set! details
+ (acons 'string-count string-count details))))
+ ((#\d) (let ((dot-size (get-numeric-from-key test-string)))
+ (set! details
+ (acons 'dot-radius dot-size details))))
+ ((#\p) (let ((dot-position (get-numeric-from-key test-string)))
+ (set! details
+ (acons 'dot-position dot-position details))))
+ (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)))))
+ ; add the modified details
+ (set! props
+ (prepend-alist-chain 'fret-diagram-details details props))
+ `(,props . ,output-list))) ;ugh -- hard-coded spell -- procedure better
+
+(define-public
+ (fret-parse-terse-definition-string props definition-string)
+ "Parse a fret diagram string that uses terse syntax;
+return a pair containing:
+@var{props}, modified to include the string-count determined by the
+definition-string, and
+a fret-indication list with the appropriate values"
+;TODO -- change syntax to fret\string-finger
+
+ (let* ((details (merge-details 'fret-diagram-details props '()))
+ (barre-start-list '())
+ (output-list '())
+ (new-props '())
+ (items (string-split definition-string #\;))
+ (string-count (- (length items) 1)))
+ (let parse-item ((myitems items))
+ (if (not (null? (cdr myitems)))
+ (let* ((test-string (car myitems))
+ (current-string (- (length myitems) 1))
+ (indicators (string-split test-string #\ )))
+ (let parse-indicators ((myindicators indicators))
+ (if (not (eq? '() myindicators))
+ (let* ((this-list (string-split (car myindicators) #\-))
+ (max-element-index (- (length this-list) 1))
+ (last-element
+ (car (list-tail this-list max-element-index)))
+ (fret
+ (if (string->number (car this-list))
+ (string->number (car this-list))
+ (car this-list))))
+ (if (equal? last-element "(")
+ (begin
+ (set! barre-start-list
+ (cons-fret (list current-string fret)
+ barre-start-list))
+ (set! this-list
+ (list-head this-list max-element-index))))
+ (if (equal? last-element ")")
+ (let* ((this-barre
+ (get-sub-list fret barre-start-list))
+ (insert-index (- (length this-barre) 1)))
+ (set! output-list
+ (cons-fret (cons* 'barre
+ (car this-barre)
+ current-string
+ (cdr this-barre))
+ output-list))
+ (set! this-list
+ (list-head this-list max-element-index))))
+ (if (number? fret)
+ (set!
+ output-list
+ (cons-fret (cons*
+ 'place-fret
+ current-string
+ (drop-paren (numerify this-list)))
+ output-list))
+ (if (equal? (car this-list) "x" )
+ (set!
+ output-list
+ (cons-fret
+ (list 'mute current-string)
+ output-list))
+ (set!
+ output-list
+ (cons-fret
+ (list 'open current-string)
+ output-list))))
+ (parse-indicators (cdr myindicators)))))
+ (parse-item (cdr myitems)))))
+ (set! details (acons 'string-count string-count details))
+ (set! props (prepend-alist-chain 'fret-diagram-details details props))
+ `(,props . ,output-list))) ; ugh -- hard coded; proc is better
+
+
+(define-builtin-markup-command
+ (fret-diagram-verbose layout props marking-list)
(pair?) ; argument type (list, but use pair? for speed)
instrument-specific-markup ; markup type
((align-dir -0.4) ; properties and defaults
(make-fret-diagram layout props marking-list))
-(define (make-fret-diagram layout 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;
-; from FretBoard engraver, but not from markup call
-;TODO -- adjust padding for fret label? it appears to be too close to dots
- (details
- (chain-assoc-get
- 'fret-diagram-details props '())) ; fret diagram details
- (string-count
- (assoc-get 'string-count details 6)) ; needed for everything
- (fret-count
- (assoc-get 'fret-count details 4)) ; needed for everything
- (orientation
- (assoc-get 'orientation details 'normal)) ; needed for everything
- (finger-code
- (assoc-get
- 'finger-code details 'none)) ; needed for draw-dots and draw-barre
- (default-dot-radius
- (if (eq? finger-code 'in-dot) 0.425 0.25)) ; bigger dots if labeled
- (default-dot-position
- (if (eq? finger-code 'in-dot)
- (- 0.95 default-dot-radius)
- 0.6)) ; move up to make room for bigger if labeled
- (dot-radius
- (assoc-get
- 'dot-radius details default-dot-radius)) ; needed for draw-dots
- ; and draw-barre
- (dot-position
- (assoc-get
- 'dot-position details default-dot-position)) ; needed for draw-dots
- ; and draw-barre
- (th
- (* (ly:output-def-lookup layout 'line-thickness)
- (chain-assoc-get 'thickness props 0.5))) ; needed for draw-frets
- ; and draw-strings
- (alignment
- (chain-assoc-get 'align-dir props -0.4)) ; needed only here
- (xo-padding
- (* size (assoc-get 'xo-padding details 0.2))) ; needed only here
- (label-space (* 0.25 size))
- (label-dir (assoc-get 'label-dir details RIGHT))
- (parameters (fret-parse-marking-list marking-list fret-count))
- (capo-fret (assoc-get 'capo-fret parameters 0))
- (dot-list (cdr (assoc 'dot-list parameters)))
- (xo-list (cdr (assoc 'xo-list parameters)))
- (fret-range (cdr (assoc 'fret-range parameters)))
- (fret-count (1+ (- (cadr fret-range) (car fret-range))))
- (barre-list (cdr (assoc 'barre-list parameters)))
- (barre-type
- (assoc-get 'barre-type details 'curved))
- (fret-diagram-stencil
- (ly:stencil-add
- (draw-strings string-count fret-range th size orientation)
- (draw-frets fret-range string-count th size orientation))))
- (if (and (not (null? barre-list))
- (not (eq? 'none barre-type)))
- (set! fret-diagram-stencil
- (ly:stencil-add
- (draw-barre layout props string-count fret-range size
- finger-code dot-position dot-radius
- barre-list orientation)
- fret-diagram-stencil)))
- (if (not (null? dot-list))
- (set! fret-diagram-stencil
- (ly:stencil-add
- fret-diagram-stencil
- (draw-dots layout props string-count fret-count
- size finger-code dot-position dot-radius
- th dot-list orientation))))
- (if (= (car fret-range) 1)
- (set! fret-diagram-stencil
- (if (eq? orientation 'normal)
- (ly:stencil-combine-at-edge
- fret-diagram-stencil Y UP
- (draw-thick-zero-fret
- props string-count th size orientation))
- (ly:stencil-combine-at-edge
- fret-diagram-stencil X LEFT
- (draw-thick-zero-fret
- props string-count th size orientation)))))
- (if (not (null? xo-list))
- (set! fret-diagram-stencil
- (if (eq? orientation 'normal)
- (ly:stencil-combine-at-edge
- fret-diagram-stencil Y UP
- (draw-xo layout props string-count fret-range
- size xo-list orientation)
- xo-padding )
- (ly:stencil-combine-at-edge
- fret-diagram-stencil X LEFT
- (draw-xo layout props string-count fret-range
- size xo-list orientation)
- xo-padding))))
- (if (> capo-fret 0)
- (set! fret-diagram-stencil
- (ly:stencil-add
- fret-diagram-stencil
- (draw-capo details string-count capo-fret fret-count
- th size dot-position orientation))))
- (if (> (car fret-range) 1)
- (set! fret-diagram-stencil
- (if (eq? orientation 'normal)
- (ly:stencil-combine-at-edge
- fret-diagram-stencil X label-dir
- (label-fret layout props string-count fret-range
- size orientation)
- label-space)
- (ly:stencil-combine-at-edge
- fret-diagram-stencil Y label-dir
- (label-fret layout props string-count fret-range
- size orientation)
- label-space))))
- (ly:stencil-aligned-to fret-diagram-stencil X alignment)))
(define-builtin-markup-command (fret-diagram layout props definition-string)
(string?) ; argument type
Note: There is no limit to the number of fret indications per string.
@end itemize"
(let ((definition-list
- (fret-parse-definition-string props definition-string)))
+ (fret-parse-definition-string props definition-string)))
(fret-diagram-verbose-markup
layout (car definition-list) (cdr definition-list))))
-(define (fret-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)
- (fret-range (list 1 fret-count))
- (barre-list '())
- (dot-list '())
- (xo-list '())
- (output-list '())
- (new-props '())
- (details (merge-details 'fret-diagram-details props '()))
- (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)))
- ((#\s) (let ((size (get-numeric-from-key test-string)))
- (set! props (prepend-alist-chain 'size size props))))
- ((#\f) (let* ((finger-code (get-numeric-from-key test-string))
- (finger-id (case finger-code
- ((0) 'none)
- ((1) 'in-dot)
- ((2) 'below-string))))
- (set! details
- (acons 'finger-code finger-id details))))
- ((#\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! details
- (acons 'fret-count fret-count details))))
- ((#\w) (let ((string-count (get-numeric-from-key test-string)))
- (set! details
- (acons 'string-count string-count details))))
- ((#\d) (let ((dot-size (get-numeric-from-key test-string)))
- (set! details
- (acons 'dot-radius dot-size details))))
- ((#\p) (let ((dot-position (get-numeric-from-key test-string)))
- (set! details
- (acons 'dot-position dot-position details))))
- (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)))))
- ; add the modified details
- (set! props
- (prepend-alist-chain 'fret-diagram-details details props))
- `(,props . ,output-list))) ;ugh -- hard-coded spell -- procedure better
-
-(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)))))))
-
(define-builtin-markup-command
(fret-diagram-terse layout props definition-string)
(string?) ; argument type
@end itemize"
;; TODO -- change syntax to fret\string-finger
(let ((definition-list
- (fret-parse-terse-definition-string props definition-string)))
+ (fret-parse-terse-definition-string props definition-string)))
(fret-diagram-verbose-markup layout
- (car definition-list)
- (cdr definition-list))))
+ (car definition-list)
+ (cdr definition-list))))
-(define-public
- (fret-parse-terse-definition-string props definition-string)
- "Parse a fret diagram string that uses terse syntax; return a pair containing:
- props, modified to include the string-count determined by the
- definition-string, and
- a fret-indication list with the appropriate values"
-;TODO -- change syntax to fret\string-finger
-
- (let* ((details (merge-details 'fret-diagram-details props '()))
- (barre-start-list '())
- (output-list '())
- (new-props '())
- (items (string-split definition-string #\;))
- (string-count (- (length items) 1)))
- (let parse-item ((myitems items))
- (if (not (null? (cdr myitems)))
- (let* ((test-string (car myitems))
- (current-string (- (length myitems) 1))
- (indicators (string-split test-string #\ )))
- (let parse-indicators ((myindicators indicators))
- (if (not (eq? '() myindicators))
- (let* ((this-list (string-split (car myindicators) #\-))
- (max-element-index (- (length this-list) 1))
- (last-element
- (car (list-tail this-list max-element-index)))
- (fret
- (if (string->number (car this-list))
- (string->number (car this-list))
- (car this-list))))
- (if (equal? last-element "(")
- (begin
- (set! barre-start-list
- (cons-fret (list current-string fret)
- barre-start-list))
- (set! this-list
- (list-head this-list max-element-index))))
- (if (equal? last-element ")")
- (let* ((this-barre
- (get-sub-list fret barre-start-list))
- (insert-index (- (length this-barre) 1)))
- (set! output-list
- (cons-fret (cons* 'barre
- (car this-barre)
- current-string
- (cdr this-barre))
- output-list))
- (set! this-list
- (list-head this-list max-element-index))))
- (if (number? fret)
- (set!
- output-list
- (cons-fret (cons*
- 'place-fret
- current-string
- (drop-paren (numerify this-list)))
- output-list))
- (if (equal? (car this-list) "x" )
- (set!
- output-list
- (cons-fret
- (list 'mute current-string)
- output-list))
- (set!
- output-list
- (cons-fret
- (list 'open current-string)
- output-list))))
- (parse-indicators (cdr myindicators)))))
- (parse-item (cdr myitems)))))
- (set! details (acons 'string-count string-count details))
- (set! props (prepend-alist-chain 'fret-diagram-details details props))
- `(,props . ,output-list))) ; ugh -- hard coded; proc is better
-(define (drop-paren item-list)
- "Drop a final parentheses from a fret indication list
- resulting from a terse string specification of barre."
- (if (> (length item-list) 0)
- (let* ((max-index (- (length item-list) 1))
- (last-element (car (list-tail item-list max-index))))
- (if (or (equal? last-element ")") (equal? last-element "("))
- (list-head item-list max-index)
- item-list))
- item-list))
-
-(define (get-sub-list value master-list)
- "Get a sub-list whose cadr is equal to @var{value} from @var{master-list}"
- (if (eq? master-list '())
- #f
- (let ((sublist (car master-list)))
- (if (equal? (cadr sublist) value)
- sublist
- (get-sub-list value (cdr master-list))))))
-
-(define (merge-details key alist-list . default)
- "Return ALIST-LIST entries for key, in one combined alist.
- There can be two ALIST-LIST entries for a given key. The first
- comes from the override-markup function, the second comes
- from property settings during a regular override.
- This is necessary because some details can be set in one
- place, while others are set in the other. Both details
- lists must be merged into a single alist.
- Return DEFAULT (optional, else #f) if not
- found."
-
- (define (helper key alist-list default)
- (if (null? alist-list)
- default
- (let* ((handle (assoc key (car alist-list))))
- (if (pair? handle)
- (append (cdr handle) (chain-assoc-get key (cdr alist-list) '()))
- (helper key (cdr alist-list) default)))))
-
- (helper key alist-list
- (if (pair? default) (car default) #f)))
projects / lilypond.git / blobdiff