;;;; 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
(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}."
(negate-extent (ly:stencil-extent stencil X)))
(else
(negate-extent (ly:stencil-extent stencil Y))))
- ; else -- eq? fretboard-axis 'string
+ ;; else -- eq? fretboard-axis 'string
(cond ((eq? orientation 'landscape)
(ly:stencil-extent stencil Y))
((eq? orientation 'opposing-landscape)
(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"
(if (> fretval maxfret) (set! maxfret fretval))
(if (< fretval minfret) (set! minfret fretval))
(updatemax (cdr fret-list)))))
- (if (> maxfret my-fret-count)
+ (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
+ ;; 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 '()))
(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
+ '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
+ '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
+ '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
+ (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))
(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))
(barre-type
(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.
(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.
- ;
+
+ ;; 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
(- label-outside-diagram)
(+ (* size (1- string-count)) label-outside-diagram))))))
-
- ; Here is the body of make-fret-diagram
- ;
+ ;; Here is the body of make-fret-diagram
(set! fret-diagram-stencil
(ly:stencil-add (draw-strings) (draw-frets)))
(list 'open (string->number (car this-list)))
output-list)))))))
(parse-item (cdr myitems)))))
- ; add the modified details
+ ;; add the modified details
(set! props
(prepend-alist-chain 'fret-diagram-details details props))
`(,props . ,output-list))) ;ugh -- hard-coded spell -- procedure better
@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 '())
projects / lilypond.git / blobdiff