;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
-;;;; Copyright (C) 2004--2012 Carl D. Sorensen <c_sorensen@byu.edu>
+;;;; Copyright (C) 2004--2015 Carl D. Sorensen <c_sorensen@byu.edu>
;;;;
;;;; LilyPond is free software: you can redistribute it and/or modify
;;;; it under the terms of the GNU General Public License as published by
;;;; You should have received a copy of the GNU General Public License
;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
-;
-; Utility functions
-;
-;
+;; Utility functions
(define (string-x-extent start-point end-point)
"Return the x-extent of a string that goes from start-point
to end-point."
(let ((x1 (car start-point))
- (x2 (car end-point)))
+ (x2 (car end-point)))
(if (> x1 x2)
(cons x2 x1)
(cons x1 x2))))
"Return the y-extent of a string that goes from start-point
to end-point."
(let ((y1 (cdr start-point))
- (y2 (cdr end-point)))
+ (y2 (cdr end-point)))
(if (> y1 y2)
(cons y2 y1)
(cons y1 y2))))
(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))))
+ (let* ((entry (substring keystring 2 (string-length keystring)))
+ (numeric-entry (string->number entry)))
+ ;; throw an error, if `entry' can't be transformed into a number
+ (if numeric-entry
+ numeric-entry
+ (ly:error
+ "Unhandled entry in fret-diagram \"~a\" in \"~a\""
+ entry
+ keystring))))
(define (numerify mylist)
"Convert string values to numeric or character"
(* 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))))
+ "Calculate the fret count for the diagram given the range of frets in the diagram."
+ (1+ (- (cdr fret-range) (car fret-range))))
+
+(define (dot-has-color dot-settings)
+ "Return a color-name as symbol, if found in @var{dot-settings} otherwise @code{#f}"
+ (cond ((null? dot-settings)
+ #f)
+ ;; Don't bother the user with quote/unquote.
+ ;; We use the name-symbol for the color, looking up in 'x11-color-list'
+ ((member (car dot-settings) (map car x11-color-list))
+ (car dot-settings))
+ (else (dot-has-color (cdr dot-settings)))))
+
+(define (dot-is-inverted dot-settings)
+ "Return @code{'inverted}, if found in @var{dot-settings} otherwise @code{'()}"
+ (let ((inverted (member 'inverted dot-settings)))
+ (if inverted
+ (car inverted)
+ '())))
+
+(define (dot-is-parenthesized dot-settings)
+ "Return @code{'parenthesized}, if found in @var{dot-settings} otherwise @code{'()}"
+ (let ((parenthesized (member 'parenthesized dot-settings)))
+ (if parenthesized
+ (car parenthesized)
+ '())))
+
+;; If @code{'default-paren-color} is not set, the parenthesis will take their
+;; color from the dot.
+;; Setting @code{'default-paren-color} will result in taking the color from
+;; `what-color', see below.
+(define (default-paren-color dot-settings)
+ "Return @code{'default-paren-color}, if found in @var{dot-settings} otherwise @code{'()}"
+ (let ((default-color (member 'default-paren-color dot-settings)))
+ (if default-color
+ (car default-color)
+ '())))
(define (subtract-base-fret base-fret dot-list)
"Subtract @var{base-fret} from every fret in @var{dot-list}"
(let ((this-list (car dot-list)))
(cons* (list
;; string
- (car this-list)
+ (car this-list)
;; fret
- (- (second this-list) base-fret)
- ;; finger
- (if (null? (cddr this-list))
- '()
- (third this-list))
- ;; color modifier
- (if (or (null? (cddr this-list))
- (null? (cdddr this-list)))
- '()
- (fourth this-list)))
+ (- (second this-list) base-fret)
+ ;; finger-number or markup
+ (if (and (not (null? (cddr this-list)))
+ (or (markup? (caddr this-list))
+ (number? (caddr this-list))))
+ (third this-list)
+ '())
+ ;; inverted
+ (dot-is-inverted this-list)
+ ;; parenthesis
+ (dot-is-parenthesized this-list)
+ ;; color modifiers
+ ;; parenthesis
+ (default-paren-color this-list)
+ ;; dots
+ (let ((colored (dot-has-color this-list)))
+ (if colored
+ colored
+ '())))
(subtract-base-fret base-fret (cdr dot-list))))))
(define (drop-paren item-list)
(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.
-;
+;; 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))))
+ (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)))))
+ (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}
+ "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))))
+ (stencil-fretboard-extent stencil fretboard-axis orientation))))
(define (string-thickness string thickness-factor)
(expt (1+ thickness-factor) (1- string)))
-;
-; Functions that create stencils used in the fret diagram
-;
+;; 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}
(prepend-alist-chain 'font-family 'sans props))))
(interpret-markup layout my-props text)))
-;;
-;;
;; 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))
+ "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 '())
((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)))
+ (if (every number? (cdr my-item))
+ (set! barre-list (cons* (cdr my-item) barre-list))
+ (ly:error
+ "barre-indications should contain only numbers: ~a"
+ (cdr my-item))))
((eq? my-code 'capo)
- (set! capo-fret (cadr my-item)))
+ (set! capo-fret (cadr my-item)))
((eq? my-code 'place-fret)
(set! dot-list (cons* (cdr my-item) dot-list))))
(parse-item (cdr mylist)))))
(if (> fretval maxfret) (set! maxfret fretval))
(if (< fretval minfret) (set! minfret fretval))
(updatemax (cdr fret-list)))))
- (if (> maxfret my-fret-count)
+ ;; take frets of 'barre-settings into account
+ (if (not (null? barre-list))
+ (set! minfret (apply min minfret (map last barre-list))))
+ (if (or (> maxfret my-fret-count) (> capo-fret 1))
(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
+ (if (not (zero? (apply min capo-fret (map cadr dot-list))))
+ (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
(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
+ ;; 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 -- get string-count directly from length of stringTunings;
+ ;; from FretBoard engraver, but not from markup call
(details (merge-details 'fret-diagram-details props '()))
+ (fret-distance
+ (assoc-get 'fret-distance details 1.0))
+ (string-distance
+ (assoc-get 'string-distance details 1.0))
(string-count
- (assoc-get 'string-count details 6)) ; needed for everything
+ (assoc-get 'string-count details 6)) ;; needed for everything
(my-fret-count
- (assoc-get 'fret-count details 4)) ; needed for everything
+ (assoc-get 'fret-count details 4)) ;; needed for everything
(orientation
- (assoc-get 'orientation details 'normal)) ; needed for everything
+ (assoc-get 'orientation details 'normal)) ;; needed for everything
(finger-code
- (assoc-get
- 'finger-code details 'none)) ; needed for draw-dots and draw-barre
+ (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
+ (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 dot if labeled
(dot-radius
- (assoc-get
- 'dot-radius details default-dot-radius)) ; needed for draw-dots
- ; and draw-barre
+ (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
+ (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
+ (* (ly:output-def-lookup layout 'line-thickness)
+ (chain-assoc-get 'thickness props 0.5)))
+ ;; needed for draw-frets and draw-strings
(sth (* size th))
(thickness-factor (assoc-get 'string-thickness-factor details 0))
+ (paren-padding (assoc-get 'paren-padding details 0.05))
(alignment
- (chain-assoc-get 'align-dir props -0.4)) ; needed only here
- (xo-padding (assoc-get 'xo-padding details 0.2)) ; needed only here
+ (chain-assoc-get 'align-dir props -0.4)) ;; needed only here
+ (xo-padding (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 (assoc-get 'dot-list parameters))
(my-fret-count (fret-count fret-range))
(barre-list (assoc-get 'barre-list parameters))
(barre-type
- (assoc-get 'barre-type details 'curved))
+ (assoc-get 'barre-type details 'curved))
(fret-diagram-stencil '()))
- ;
+
;; Here are the fret diagram helper functions that depend on the
;; fret diagram parameters. The functions are here because the
;; diagram parameters are part of the lexical scope here.
"Return a pair @code{(x-coordinate . y-coordinate)}
in stencil coordinate system."
(cond
- ((eq? orientation 'landscape)
- (cons fret-coordinate
- (- string-coordinate (1- string-count))))
- ((eq? orientation 'opposing-landscape)
- (cons (- fret-coordinate) (- string-coordinate)))
- (else
- (cons string-coordinate (- fret-coordinate)))))
+ ((eq? orientation 'landscape)
+ (cons fret-coordinate
+ (- string-coordinate (1- string-count))))
+ ((eq? orientation 'opposing-landscape)
+ (cons (- fret-coordinate) (- string-coordinate)))
+ (else
+ (cons string-coordinate (- fret-coordinate)))))
(define (stencil-coordinate-offset fret-offset string-offset)
"Return a pair @code{(x-offset . y-offset)}
for translation in stencil coordinate system."
(cond
- ((eq? orientation 'landscape)
- (cons fret-offset (- string-offset)))
- ((eq? orientation 'opposing-landscape)
- (cons (- fret-offset) string-offset))
- (else
- (cons string-offset (- fret-offset)))))
+ ((eq? orientation 'landscape)
+ (cons fret-offset (- string-offset)))
+ ((eq? orientation 'opposing-landscape)
+ (cons (- fret-offset) string-offset))
+ (else
+ (cons string-offset (- fret-offset)))))
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))
- (right-end-point
- (stencil-coordinates base stop))
- (left-upper-control-point
- (stencil-coordinates
+ (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))
+ (right-end-point
+ (stencil-coordinates base stop))
+ (left-upper-control-point
+ (stencil-coordinates
top-control-point-height cp-left-width))
- (left-lower-control-point
- (stencil-coordinates
+ (left-lower-control-point
+ (stencil-coordinates
bottom-control-point-height cp-left-width))
- (right-upper-control-point
- (stencil-coordinates
+ (right-upper-control-point
+ (stencil-coordinates
top-control-point-height cp-right-width))
- (right-lower-control-point
- (stencil-coordinates
+ (right-lower-control-point
+ (stencil-coordinates
bottom-control-point-height cp-right-width)))
- ; 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)))
+
+ ;; order of bezier control points is:
+ ;; left cp low, left cp low, right cp low, right end low
+ ;; right cp high, left cp high
+
+ (list
+ left-end-point
+ left-lower-control-point
+ right-lower-control-point
+ right-end-point
+
+ right-upper-control-point
+ left-upper-control-point)))
(define (draw-strings)
"Draw the string lines for a fret diagram with
(define (helper x)
(if (null? (cdr x))
- (string-stencil (car x))
- (ly:stencil-add
(string-stencil (car x))
- (helper (cdr x)))))
+ (ly:stencil-add
+ (string-stencil (car x))
+ (helper (cdr x)))))
- (let* ( (string-list (map 1+ (iota string-count))))
+ (let* ((string-list (map 1+ (iota string-count))))
(helper string-list)))
(define (string-stencil string)
overall parameters."
(let* ((string-coordinate (- string-count string))
(current-string-thickness
- (* th size (string-thickness string thickness-factor)))
+ (* th size (string-thickness string thickness-factor)))
(fret-half-thickness (* size th 0.5))
(half-string (* current-string-thickness 0.5))
(start-coordinates
- (stencil-coordinates
- (- fret-half-thickness)
- (- (* size string-coordinate) half-string)))
+ (stencil-coordinates
+ (- fret-half-thickness)
+ (- (* size string-distance string-coordinate) half-string)))
(end-coordinates
- (stencil-coordinates
- (+ fret-half-thickness (* size (1+ (fret-count fret-range))))
- (+ half-string (* size string-coordinate)))))
+ (stencil-coordinates
+ (+ fret-half-thickness
+ (* size fret-distance (1+ (fret-count fret-range))))
+ (+ half-string
+ (* size string-distance string-coordinate)))))
(ly:round-filled-box
(string-x-extent start-coordinates end-coordinates)
(string-y-extent start-coordinates end-coordinates)
@var{size}. Orientation is given by @var{orientation}."
(define (helper x)
(if (null? (cdr x))
- (fret-stencil (car x))
- (ly:stencil-add
(fret-stencil (car x))
- (helper (cdr x)))))
+ (ly:stencil-add
+ (fret-stencil (car x))
+ (helper (cdr x)))))
(let ((fret-list (iota (1+ my-fret-count))))
(helper fret-list)))
- (define (fret-stencil fret)
- "Make a stencil for @code{fret}, given the
+ (define (fret-stencil fret)
+ "Make a stencil for @code{fret}, given the
fret-diagram overall parameters."
- (let* ((low-string-half-thickness
- (* 0.5
- size
- th
- (string-thickness string-count thickness-factor)))
- (fret-half-thickness (* 0.5 size th))
- (start-coordinates
- (stencil-coordinates
- (* size fret)
- (- fret-half-thickness low-string-half-thickness)))
- (end-coordinates
- (stencil-coordinates
- (* size fret)
- (* size (1- string-count)))))
- (make-line-stencil
- (* size th)
- (car start-coordinates) (cdr start-coordinates)
- (car end-coordinates) (cdr end-coordinates))))
-
- (define (draw-barre barre-list)
- "Create barre indications for a fret diagram"
- (if (not (null? barre-list))
- (let* ((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
+ (let* ((low-string-half-thickness
+ (* 0.5
+ size
+ th
+ (string-thickness string-count thickness-factor)))
+ (fret-half-thickness (* 0.5 size th))
+ (start-coordinates
+ (stencil-coordinates
+ (* fret-distance size fret)
+ (- fret-half-thickness low-string-half-thickness)))
+ (end-coordinates
+ (stencil-coordinates
+ (* fret-distance size fret)
+ (* size string-distance (1- string-count)))))
+ (make-line-stencil
+ (* size th)
+ (car start-coordinates) (cdr start-coordinates)
+ (car end-coordinates) (cdr end-coordinates))))
+
+ (define (draw-barre barre-list)
+ "Create barre indications for a fret diagram"
+ (if (not (null? barre-list))
+ (let* ((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
+ (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
(cond
- ((eq? barre-type 'straight)
- (make-straight-barre-stencil
- barre-fret-coordinate
- barre-start-string-coordinate
- barre-end-string-coordinate
- scale-dot-radius))
- ((eq? barre-type 'curved)
- (make-curved-barre-stencil
- barre-fret-coordinate
- barre-start-string-coordinate
- barre-end-string-coordinate
- scale-dot-radius)))))
- (if (not (null? (cdr barre-list)))
- (ly:stencil-add
- barre-stencil
- (draw-barre (cdr barre-list)))
- barre-stencil ))))
-
- (define (make-straight-barre-stencil
- fret-coordinate
- start-string-coordinate
- end-string-coordinate
- half-thickness)
- "Create a straight barre stencil."
- (let ((start-point
- (stencil-coordinates
- (* size fret-coordinate)
- (* size start-string-coordinate)))
- (end-point
- (stencil-coordinates
- (* size fret-coordinate)
- (* size end-string-coordinate))))
- (make-line-stencil
- half-thickness
- (car start-point)
- (cdr start-point)
- (car end-point)
- (cdr end-point))))
-
- (define (make-curved-barre-stencil
- fret-coordinate
- start-string-coordinate
- end-string-coordinate
- half-thickness)
- "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)))
- (box-lower-left
- (stencil-coordinates
- (+ (* size fret-coordinate) half-thickness)
- (- (* size start-string-coordinate) half-thickness)))
- (box-upper-right
- (stencil-coordinates
- (- (* size fret-coordinate)
- (* size bezier-height)
- half-thickness)
- (+ (* size end-string-coordinate) half-thickness)))
- (x-extent (cons (car box-lower-left) (car box-upper-right)))
- (y-extent (cons (cdr box-lower-left) (cdr box-upper-right))))
- (make-bezier-sandwich-stencil
- bezier-list
- (* size bezier-thick)
- x-extent
- y-extent)))
-
- (define (draw-dots dot-list)
- "Make dots for fret diagram."
-
- (let* ( (scale-dot-radius (* size dot-radius))
+ ((eq? barre-type 'straight)
+ (make-straight-barre-stencil
+ barre-fret-coordinate
+ barre-start-string-coordinate
+ barre-end-string-coordinate
+ scale-dot-radius))
+ ((eq? barre-type 'curved)
+ (make-curved-barre-stencil
+ barre-fret-coordinate
+ barre-start-string-coordinate
+ barre-end-string-coordinate
+ scale-dot-radius)))))
+ (if (not (null? (cdr barre-list)))
+ (ly:stencil-add
+ barre-stencil
+ (draw-barre (cdr barre-list)))
+ barre-stencil ))))
+
+ (define (make-straight-barre-stencil
+ fret-coordinate
+ start-string-coordinate
+ end-string-coordinate
+ half-thickness)
+ "Create a straight barre stencil."
+ (let ((start-point
+ (stencil-coordinates
+ (* size fret-distance fret-coordinate)
+ (* size string-distance start-string-coordinate)))
+ (end-point
+ (stencil-coordinates
+ (* size fret-distance fret-coordinate)
+ (* size string-distance end-string-coordinate))))
+ (make-line-stencil
+ half-thickness
+ (car start-point)
+ (cdr start-point)
+ (car end-point)
+ (cdr end-point))))
+
+ (define (make-curved-barre-stencil
+ fret-coordinate
+ start-string-coordinate
+ end-string-coordinate
+ half-thickness)
+ "Create a curved barre stencil."
+ (let* ((bezier-thick 0.1)
+ (bezier-height 0.5)
+ (bezier-list
+ (make-bezier-sandwich-list
+ (* size string-distance start-string-coordinate)
+ (* size string-distance end-string-coordinate)
+ (* size fret-distance fret-coordinate)
+ (* size bezier-height)
+ (* size bezier-thick))))
+ (make-bezier-sandwich-stencil
+ bezier-list
+ (* size bezier-thick))))
+
+ (define (draw-dots dot-list)
+ "Make dots for fret diagram."
+
+ (let* ( (scale-dot-radius (* size dot-radius))
(scale-dot-thick (* size th))
- (default-dot-color (assoc-get 'dot-color details 'black))
+ (default-dot-color (assoc-get 'dot-color details))
(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
- (cond ((or (eq? orientation 'landscape)
- (eq? orientation 'opposing-landscape))
- 0.5)
- (else 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))
- (fret-coordinate (* size (+ (1- fret) dot-position)))
- (string-coordinate (* size (- string-count string)))
+ (fret-coordinate
+ (* size fret-distance (+ (1- fret) dot-position)))
+ (string-coordinate
+ (* size string-distance (- string-count string)))
(dot-coordinates
- (stencil-coordinates fret-coordinate string-coordinate))
+ (stencil-coordinates fret-coordinate string-coordinate))
(extent (cons (- scale-dot-radius) scale-dot-radius))
(finger (caddr mypair))
(finger (if (number? finger) (number->string finger) finger))
- (inverted-color (eq? 'inverted (cadddr mypair)))
- (dot-color (if (or (and (eq? default-dot-color 'black) inverted-color)
- (and (eq? default-dot-color 'white) (not inverted-color)))
- 'white
- 'black))
- (dot-stencil (if (eq? dot-color 'white)
- (ly:stencil-add
- (make-circle-stencil
- scale-dot-radius scale-dot-thick #t)
- (ly:stencil-in-color
- (make-circle-stencil
- (- scale-dot-radius (* 0.5 scale-dot-thick))
- 0 #t)
- 1 1 1))
- (make-circle-stencil
- scale-dot-radius scale-dot-thick #t)))
+ (parenthesized
+ (if (not (null? (dot-is-parenthesized mypair)))
+ (dot-is-parenthesized mypair)
+ #f))
+ (parenthesis-color
+ (if (not (null? (default-paren-color mypair)))
+ (default-paren-color mypair)
+ #f))
+ (inverted
+ (if (not (null? (dot-is-inverted mypair)))
+ (dot-is-inverted mypair)
+ #f))
+ (dot-color-is-white?
+ (or inverted
+ (and (eq? default-dot-color 'white) (not inverted))))
+ (what-color
+ (x11-color
+ (cond ((and inverted
+ (not (dot-has-color mypair))
+ (not (eq? default-dot-color 'white)))
+ (or default-dot-color 'black))
+ (dot-color-is-white?
+ (or (dot-has-color mypair) 'black))
+ (else
+ (or (dot-has-color mypair)
+ default-dot-color
+ 'black)))))
+ (inverted-stil
+ (lambda (color)
+ (ly:stencil-add
+ (stencil-with-color
+ (make-circle-stencil
+ scale-dot-radius scale-dot-thick #t)
+ color)
+ (stencil-with-color
+ (make-circle-stencil
+ (- scale-dot-radius (* 0.5 scale-dot-thick))
+ 0 #t)
+ (x11-color 'white)))))
+ (dot-stencil
+ (if dot-color-is-white?
+ (inverted-stil what-color)
+ (stencil-with-color
+ (make-circle-stencil
+ scale-dot-radius scale-dot-thick #t)
+ what-color)))
+ (par-dot-stencil
+ (let ((paren-color
+ (if (and parenthesis-color
+ (not (eq? default-dot-color 'white)))
+ (x11-color (or default-dot-color 'black))
+ what-color)))
+ (stencil-with-color
+ (parenthesize-stencil
+ dot-stencil ;; stencil
+ (* size th 0.75) ;; half-thickness
+ (* 0.15 size) ;;width
+ 0 ;; angularity
+ paren-padding ;; padding
+ )
+ paren-color)))
+ (final-dot-stencil
+ (if parenthesized
+ par-dot-stencil
+ dot-stencil))
(positioned-dot
- (ly:stencil-translate dot-stencil dot-coordinates))
+ (ly:stencil-translate final-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))))
- (ly:stencil-translate
- (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
+ (cond
+ ((or (eq? finger '())(eq? finger-code 'none))
+ positioned-dot)
+ ((eq? finger-code 'in-dot)
+ (let* ((finger-stil
+ (if (not (null? finger))
(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 my-fret-count finger-label-padding))
- label-fret-offset))
- (label-string-coordinate string-coordinate)
- (label-translation
- (stencil-coordinates
- label-fret-coordinate
- label-string-coordinate)))
- (ly:stencil-add
- positioned-dot
- (ly:stencil-translate
- label-stencil
- label-translation))))
- (else ;unknown finger-code
- positioned-dot))))
- (if (null? restlist)
- labeled-dot-stencil
- (ly:stencil-add
+ layout props dot-label-font-mag finger)
+ empty-stencil))
+ (finger-stil-length
+ (interval-length (ly:stencil-extent finger-stil X)))
+ (finger-stil-height
+ (interval-length (ly:stencil-extent finger-stil Y)))
+ (dot-stencil-radius
+ (/ (interval-length (ly:stencil-extent dot-stencil Y))
+ 2))
+ (scale-factor
+ (/ dot-stencil-radius
+ ;; Calculate the radius of the circle through the
+ ;; corners of the box containing the finger-stil.
+ ;; Give it a little padding. The value, (* 2 th),
+ ;; is my choice
+ (+
+ (sqrt
+ (+ (expt (/ finger-stil-length 2) 2)
+ (expt (/ finger-stil-height 2) 2)))
+ (* 2 th))))
+ (finger-label
+ (centered-stencil
+ (ly:stencil-scale
+ (sans-serif-stencil
+ layout props
+ dot-label-font-mag
+ finger)
+ scale-factor scale-factor))))
+ (ly:stencil-translate
+ (ly:stencil-add
+ final-dot-stencil
+ (if dot-color-is-white?
+ (stencil-with-color
+ finger-label
+ what-color)
+ (stencil-with-color finger-label white)))
+ 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
+ ;; (1) Move the below-string-finger-codes to the bottom
+ ;; edge of the string, i.e.
+ ;; (* (1+ my-fret-count) fret-distance)
+ ;; (2) add `finger-label-padding' (a hardcoded
+ ;; correction-value to get a bit default padding).
+ ;; TODO: make it a property?
+ ;; (3) scale this with `size'
+ ;; (4) add `label-fret-offset', to get the final
+ ;; padding
+ (+
+ (* size
+ (+ (* (1+ my-fret-count) fret-distance)
+ finger-label-padding))
+ label-fret-offset))
+ (label-string-coordinate string-coordinate)
+ (label-translation
+ (stencil-coordinates
+ label-fret-coordinate
+ label-string-coordinate)))
+ (ly:stencil-add
+ positioned-dot
+ (ly:stencil-translate
+ label-stencil
+ label-translation))))
+ (else ;unknown finger-code
+ positioned-dot))))
+ (if (null? restlist)
+ labeled-dot-stencil
+ (ly:stencil-add
(draw-dots restlist)
labeled-dot-stencil))))
- (define (draw-thick-zero-fret)
- "Draw a thick zeroth fret for a fret diagram whose base fret is 1."
- (let* ((half-lowest-string-thickness
- (* 0.5 th (string-thickness string-count thickness-factor)))
- (half-thick (* 0.5 sth))
- (top-fret-thick
- (* sth (assoc-get 'top-fret-thickness details 3.0)))
- (start-string-coordinate (- half-lowest-string-thickness))
- (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))
- (upper-right
- (stencil-coordinates
- end-fret-coordinate end-string-coordinate)))
- (ly:round-filled-box
- (cons (car lower-left) (car upper-right))
- (cons (cdr lower-left) (cdr upper-right))
- sth)))
-
- (define (draw-xo xo-list)
- "Put open and mute string indications on diagram, as contained in
+ (define (draw-thick-zero-fret)
+ "Draw a thick zeroth fret for a fret diagram whose base fret is 1."
+ (let* ((half-lowest-string-thickness
+ (* 0.5 th (string-thickness string-count thickness-factor)))
+ (half-thick (* 0.5 sth))
+ (top-fret-thick
+ (* sth (assoc-get 'top-fret-thickness details 3.0)))
+ (start-string-coordinate (- half-lowest-string-thickness))
+ (end-string-coordinate
+ (+ (* size string-distance (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))
+ (upper-right
+ (stencil-coordinates
+ end-fret-coordinate end-string-coordinate)))
+ (ly:round-filled-box
+ ;; Put limits in order, or else the intervals are considered empty
+ (ordered-cons (car lower-left) (car upper-right))
+ (ordered-cons (cdr lower-left) (cdr upper-right))
+ sth)))
+
+ (define (draw-xo xo-list)
+ "Put open and mute string indications on diagram, as contained in
@var{xo-list}."
- (let* ((xo-font-mag
- (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")))
- (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))
- (positioned-glyph
- (ly:stencil-translate
- glyph-stencil
- glyph-stencil-coordinates)))
- (if (null? restlist)
- positioned-glyph
- (ly:stencil-add
+ (let* ((xo-font-mag
+ (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")))
+ (glyph-string-coordinate
+ (* (- string-count (cadr mypair)) string-distance 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))
+ (positioned-glyph
+ (ly:stencil-translate
+ glyph-stencil
+ glyph-stencil-coordinates)))
+ (if (null? restlist)
+ positioned-glyph
+ (ly:stencil-add
positioned-glyph
(draw-xo restlist)))))
- (define (draw-capo fret)
- "Draw a capo indicator across the full width of the fret-board
+ (define (draw-capo fret)
+ "Draw a capo indicator across the full width of the fret-board
at @var{fret}."
- (let* ((capo-thick
- (* size (assoc-get 'capo-thickness details 0.5)))
- (half-thick (* capo-thick 0.5))
- (last-string-position 0)
- (first-string-position (* size (- string-count 1)))
- (fret-position ( * size (1- (+ dot-position fret))))
- (start-point
- (stencil-coordinates
- fret-position
- first-string-position))
- (end-point
- (stencil-coordinates
- fret-position
- last-string-position)))
- (make-line-stencil
- capo-thick
- (car start-point) (cdr start-point)
- (car end-point) (cdr end-point))))
-
- (define (label-fret fret-range)
- "Label the base fret on a fret diagram"
- (let* ((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))
- ((equal? 'custom number-type)
- (fancy-format #f
- (assoc-get 'fret-label-custom-format
- details "~a")
- 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)))
- (ly:stencil-translate
- label-stencil
+ (let* ((capo-thick
+ (* size (assoc-get 'capo-thickness details 0.5)))
+ (half-thick (* capo-thick 0.5))
+ (last-string-position 0)
+ (first-string-position (* size (- string-count 1)))
+ (fret-position (* size (1- (+ dot-position fret))))
+ (start-point
(stencil-coordinates
- (* size (+ 1.0 label-vertical-offset))
- (if (eq? label-dir LEFT)
- (- label-outside-diagram)
- (+ (* size (1- string-count)) label-outside-diagram))))))
-
-
- ; Here is the body of make-fret-diagram
- ;
+ (* fret-distance fret-position)
+ (* string-distance first-string-position)))
+ (end-point
+ (stencil-coordinates
+ (* fret-distance fret-position)
+ last-string-position)))
+ (make-line-stencil
+ capo-thick
+ (car start-point) (cdr start-point)
+ (car end-point) (cdr end-point))))
+
+ (define (label-fret fret-range)
+ "Label the base fret on a fret diagram"
+ (let* ((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))
+ (label-horizontal-offset
+ (assoc-get 'fret-label-horizontal-offset details 0))
+ (number-type
+ (assoc-get 'number-type details 'roman-lower))
+ (label-text
+ (number-format number-type base-fret
+ (assoc-get 'fret-label-custom-format
+ details "~a")))
+ (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
+ (* size label-horizontal-offset)
+ label-half-width)))
+ (ly:stencil-translate
+ label-stencil
+ (stencil-coordinates
+ (* size fret-distance (1+ label-vertical-offset))
+ (if (eqv? label-dir LEFT)
+ (- label-outside-diagram)
+ (+ (* size string-distance (1- string-count))
+ label-outside-diagram))))))
+
+ ;; Here is the body of make-fret-diagram
(set! fret-diagram-stencil
- (ly:stencil-add (draw-strings) (draw-frets)))
+ (ly:stencil-add (draw-strings) (draw-frets)))
(if (and (not (null? barre-list))
(not (eq? 'none barre-type)))
- (set! fret-diagram-stencil
- (ly:stencil-add
- (draw-barre barre-list)
- fret-diagram-stencil)))
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ (draw-barre barre-list)
+ fret-diagram-stencil)))
(if (not (null? dot-list))
- (set! fret-diagram-stencil
- (ly:stencil-add
- fret-diagram-stencil
- (draw-dots dot-list))))
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ fret-diagram-stencil
+ (draw-dots dot-list))))
(if (= (car fret-range) 1)
- (set! fret-diagram-stencil
- (ly:stencil-add
- fret-diagram-stencil
- (draw-thick-zero-fret))))
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ fret-diagram-stencil
+ (draw-thick-zero-fret))))
(if (not (null? xo-list))
- (let* ((diagram-fret-top
- (car (stencil-fretboard-extent
+ (let* ((diagram-fret-top
+ (car (stencil-fretboard-extent
fret-diagram-stencil
'fret
orientation)))
- (xo-stencil (draw-xo xo-list))
- (xo-fret-offset
- (stencil-fretboard-offset
+ (xo-stencil (draw-xo xo-list))
+ (xo-fret-offset
+ (stencil-fretboard-offset
xo-stencil 'fret orientation))
- (xo-stencil-offset
- (stencil-coordinate-offset
- (- diagram-fret-top
- xo-fret-offset
- (* size xo-padding))
- 0)))
- (set! fret-diagram-stencil
- (ly:stencil-add
- fret-diagram-stencil
- (ly:stencil-translate
- xo-stencil
- xo-stencil-offset)))))
+ (xo-stencil-offset
+ (stencil-coordinate-offset
+ (- diagram-fret-top
+ xo-fret-offset
+ (* size xo-padding))
+ 0)))
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ fret-diagram-stencil
+ (ly:stencil-translate
+ xo-stencil
+ xo-stencil-offset)))))
(if (> capo-fret 0)
- (set! fret-diagram-stencil
- (ly:stencil-add
- fret-diagram-stencil
- (draw-capo capo-fret))))
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ fret-diagram-stencil
+ (draw-capo capo-fret))))
(if (> (car fret-range) 1)
- (set! fret-diagram-stencil
- (ly:stencil-add
- fret-diagram-stencil
- (label-fret fret-range))))
+ (set! fret-diagram-stencil
+ (ly:stencil-add
+ fret-diagram-stencil
+ (label-fret fret-range))))
(ly:stencil-aligned-to fret-diagram-stencil X alignment)))
(define (fret-parse-definition-string props definition-string)
- "Parse a fret diagram string and return a pair containing:
+ "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))))
- ((#\t) (let ((th (get-numeric-from-key test-string)))
- (set! props (prepend-alist-chain 'thickness th 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
+ (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 '()))
+ ;; remove whitespace-characters from definition-string
+ (cleared-string (remove-whitespace definition-string))
+ (items (string-split cleared-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))))
+ ((#\t) (let ((th (get-numeric-from-key test-string)))
+ (set! props (prepend-alist-chain 'thickness th 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 #\-))
+ (fret-number (string->number (car this-list))))
+ ;; If none of the above applies, `fret-number' needs to be a
+ ;; number. Throw an error, if not.
+ (if (not fret-number)
+ (ly:error
+ "Unhandled entry in fret-diagrams \"~a\" in \"~a\""
+ (car this-list)
+ 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 fret-number)
+ output-list))
+ (set! output-list
+ (cons-fret
+ (list 'open fret-number)
+ 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)
@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
+ ;; TODO -- change syntax to fret\string-finger
(let* ((details (merge-details 'fret-diagram-details props '()))
(barre-start-list '())
(pair?) ; argument type (list, but use pair? for speed)
#:category instrument-specific-markup ; markup type
#:properties ((align-dir -0.4) ; properties and defaults
- (size 1.0)
- (fret-diagram-details)
- (thickness 0.5))
+ (size 1.0)
+ (fret-diagram-details)
+ (thickness 0.5))
"Make a fret diagram containing the symbols indicated in @var{marking-list}.
For example,
Place a capo indicator (a large solid bar) across the entire fretboard
at fret location @var{fret-number}. Also, set fret @var{fret-number}
to be the lowest fret on the fret diagram.
-
-@item (place-fret @var{string-number} @var{fret-number} [@var{finger-value} [@var{color-modifier}]])
+@item
+(place-fret @var{string-number}
+ @var{fret-number}
+ [@var{finger-value}]
+ [@var{color-modifier}]
+ [@var{color}]
+ [@code{'parenthesized} [@code{'default-paren-color}]])
Place a fret playing indication on string @var{string-number} at fret
@var{fret-number} with an optional fingering label @var{finger-value},
-and an optional color modifier @var{color-modifier}.
+an optional color modifier @var{color-modifier}, an optional color
+@var{color}, an optional parenthesis @code{'parenthesized} and an
+optional paranthesis color @code{'default-paren-color}.
By default, the fret playing indicator is a solid dot. This can be
-globally changed by setting the value of the variable @var{dot-color}.
+globally changed by setting the value of the variable @var{dot-color}
+or for a single dot by setting the value of @var{color}. The dot can
+be parenthesized by adding @code{'parenthesized}. By default the
+color for the parenthesis is taken from the dot. Adding
+@code{'default-paren-color} will take the parenthesis-color from the
+global @var{dot-color}, as a fall-back black will be used.
Setting @var{color-modifier} to @code{inverted} inverts the dot color
for a specific fingering.
+The values for @var{string-number}, @var{fret-number}, and the optional
+@var{finger} should be entered first in that order.
+The order of the other optional arguments does not matter.
If the @var{finger} part of the @code{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
(fret-diagram-verbose-markup layout
(car definition-list)
(cdr definition-list))))
-
-
projects / lilypond.git / blobdiff