new-props
(markup #:draw-dashed-line dest))))
+(define-markup-command (draw-squiggle-line layout props sq-length dest eq-end?)
+ (number? number-pair? boolean?)
+ #:category graphic
+ #:properties ((thickness 0.5)
+ (angularity 0)
+ (height 0.5)
+ (orientation 1))
+ "
+@cindex drawing squiggled lines within text
+
+A squiggled line.
+
+If @code{eq-end?} is set to @code{#t}, it is ensured the squiggled line ends
+with a bow in same direction as the starting one. @code{sq-length} is the
+length of the first bow. @code{dest} is the end point of the squiggled line.
+To match @code{dest} the squiggled line is scaled accordingly.
+Its appearance may be customized by overrides for @code{thickness},
+@code{angularity}, @code{height} and @code{orientation}.
+@lilypond[verbatim,quote]
+\\markup
+ \\column {
+ \\draw-squiggle-line #0.5 #'(6 . 0) ##t
+ \\override #'(orientation . -1)
+ \\draw-squiggle-line #0.5 #'(6 . 0) ##t
+ \\draw-squiggle-line #0.5 #'(6 . 0) ##f
+ \\override #'(height . 1)
+ \\draw-squiggle-line #0.5 #'(6 . 0) ##t
+ \\override #'(thickness . 5)
+ \\draw-squiggle-line #0.5 #'(6 . 0) ##t
+ \\override #'(angularity . 2)
+ \\draw-squiggle-line #0.5 #'(6 . 0) ##t
+ }
+@end lilypond"
+ (let* ((line-thickness (ly:output-def-lookup layout 'line-thickness))
+ (thick (* thickness line-thickness))
+ (x (car dest))
+ (y (cdr dest))
+ (length-to-print (magnitude (make-rectangular x y)))
+ ;; Make a guess how many bows may be needed
+ (guess (max 1 (truncate (/ length-to-print sq-length))))
+ ;; If `eq-end?' is set #t, make sure squiggle-line starts and ends
+ ;; with a bow in same direction
+ (amount (if (and (even? guess) eq-end?) (1+ guess) guess))
+ ;; The lined-up bows needs to fit `length-to-print'
+ ;; Thus scale the length of first bow accordingly
+ ;; Other bows are copies
+ (guessed-squiggle-line-length (* amount sq-length))
+ (line-length-diff (- length-to-print guessed-squiggle-line-length))
+ (line-length-diff-for-each-squiggle
+ (/ line-length-diff amount))
+ (first-bow-length (+ sq-length line-length-diff-for-each-squiggle))
+ ;; Get first bows
+ ;; TODO two bows are created via `make-bow-stencil'
+ ;; cheaper to use `ly:stencil-scale'?
+ (first-bow-end-coord
+ (cons
+ (/ (* first-bow-length x) length-to-print)
+ (/ (* first-bow-length y) length-to-print)))
+ (init-bow
+ (lambda (o)
+ (make-bow-stencil
+ '(0 . 0)
+ first-bow-end-coord
+ thick angularity height o)))
+ (init-bow-up (init-bow orientation))
+ (init-bow-down (init-bow (- orientation)))
+ ;; Get a list of starting-points for the bows
+ (list-of-starts
+ (map
+ (lambda (n)
+ (cons
+ (* n (car first-bow-end-coord))
+ (* n (cdr first-bow-end-coord))))
+ (iota amount))))
+ ;; The final stencil: lined-up bows
+ (apply ly:stencil-add
+ (map
+ (lambda (stil pt) (ly:stencil-translate stil pt))
+ (circular-list init-bow-up init-bow-down)
+ list-of-starts))))
+
(define-markup-command (draw-hline layout props)
()
#:category graphic
`(delay-stencil-evaluation ,(delay expr))
x y))))
+(define-markup-command (with-dimensions-from layout props arg1 arg2)
+ (markup? markup?)
+ #:category other
+ "
+Print @var{arg2} with the dimensions of @var{arg1}."
+ (let* ((stil1 (interpret-markup layout props arg1))
+ (x (ly:stencil-extent stil1 0))
+ (y (ly:stencil-extent stil1 1)))
+ (interpret-markup layout props (markup #:with-dimensions x y arg2))))
+
(define-markup-command (pad-around layout props amount arg)
(number? markup?)
#:category align
"Like @code{\\override}, for markup lists."
(interpret-markup-list layout (cons (list new-prop) props) args))
+(define-markup-list-command (table layout props column-align lst)
+ (number-list? markup-list?)
+ #:properties ((padding 0)
+ (baseline-skip))
+ "@cindex creating a table.
+
+Returns a table.
+
+@var{column-align} specifies how each column is aligned, possible values are
+-1, 0, 1. The number of elements in @var{column-align} determines how many
+columns will be printed.
+The entries to print are given by @var{lst}, a markup-list. If needed, the last
+row is filled up with @code{point-stencil}s.
+Overriding @code{padding} may be used to increase columns horizontal distance.
+Overriding @code{baseline-skip} to increase rows vertical distance.
+@lilypond[verbatim,quote]
+\\markuplist {
+ \\override #'(padding . 2)
+ \\table
+ #'(0 1 0 -1)
+ {
+ \\underline { center-aligned right-aligned center-aligned left-aligned }
+ one \\number 1 thousandth \\number 0.001
+ eleven \\number 11 hundredth \\number 0.01
+ twenty \\number 20 tenth \\number 0.1
+ thousand \\number 1000 one \\number 1.0
+ }
+}
+@end lilypond
+"
+
+ (define (split-lst initial-lst lngth result-lst)
+ ;; split a list into a list of sublists of length lngth
+ ;; eg. (split-lst '(1 2 3 4 5 6) 2 '())
+ ;; -> ((1 2) (3 4) (5 6))
+ (cond ((not (integer? (/ (length initial-lst) lngth)))
+ (ly:warning
+ "Can't split list of length ~a into ~a parts, returning empty list"
+ (length initial-lst) lngth)
+ '())
+ ((null? initial-lst)
+ (reverse result-lst))
+ (else
+ (split-lst
+ (drop initial-lst lngth)
+ lngth
+ (cons (take initial-lst lngth) result-lst)))))
+
+ (define (dists-list init padding lst)
+ ;; Returns a list, where each element of `lst' is
+ ;; added to the sum of the previous elements of `lst' plus padding.
+ ;; `init' will be the first element of the resulting list. The addition
+ ;; starts with the values of `init', `padding' and `(car lst)'.
+ ;; eg. (dists-list 0.01 0.1 '(1 2 3 4)))
+ ;; -> (0.01 1.11 3.21 6.31 10.41)
+ (if (or (not (number? init))
+ (not (number? padding))
+ (not (number-list? lst)))
+ (begin
+ (ly:warning
+ "not fitting argument for `dists-list', return empty lst ")
+ '())
+ (reverse
+ (fold (lambda (elem rl) (cons (+ elem padding (car rl)) rl))
+ (list init)
+ lst))))
+
+ (let* (;; get the number of columns
+ (columns (length column-align))
+ (init-stils (interpret-markup-list layout props lst))
+ ;; If the given markup-list is the result of a markup-list call, their
+ ;; length may not be easily predictable, thus we add point-stencils
+ ;; to fill last row of the table.
+ (rem (remainder (length init-stils) columns))
+ (filled-stils
+ (if (zero? rem)
+ init-stils
+ (append init-stils (make-list (- columns rem) point-stencil))))
+ ;; get the stencils in sublists of length `columns'
+ (stils
+ (split-lst filled-stils columns '()))
+ ;; procedure to return stencil-length
+ ;; If it is nan, return 0
+ (lengths-proc
+ (lambda (m)
+ (let ((lngth (interval-length (ly:stencil-extent m X))))
+ (if (nan? lngth) 0 lngth))))
+ ;; get the max width of each column in a list
+ (columns-max-x-lengths
+ (map
+ (lambda (x)
+ (apply max 0
+ (map
+ lengths-proc
+ (map (lambda (l) (list-ref l x)) stils))))
+ (iota columns)))
+ ;; create a list of (basic) distances, which each column should
+ ;; moved, using `dists-list'. Some padding may be added.
+ (dist-sequence
+ (dists-list 0 padding columns-max-x-lengths))
+ ;; Get all stencils of a row, moved accurately to build columns.
+ ;; If the items of a column are aligned other than left, we need to
+ ;; move them to avoid collisions:
+ ;; center aligned: move all items half the width of the widest item
+ ;; right aligned: move all items the full width of the widest item.
+ ;; Added to the default-offset calculated in `dist-sequence'.
+ ;; `stencils-for-row-proc' needs four arguments:
+ ;; stil - a stencil
+ ;; dist - a numerical value as basic offset in X direction
+ ;; column - a numerical value for the column we're in
+ ;; x-align - a numerical value how current column should be
+ ;; aligned, where (-1, 0, 1) means (LEFT, CENTER, RIGHT)
+ (stencils-for-row-proc
+ (lambda (stil dist column x-align)
+ (ly:stencil-translate-axis
+ (ly:stencil-aligned-to stil X x-align)
+ (cond ((member x-align '(0 1))
+ (let* (;; get the stuff for relevant column
+ (stuff-for-column
+ (map
+ (lambda (s) (list-ref s column))
+ stils))
+ ;; get length of every column-item
+ (lengths-for-column
+ (map lengths-proc stuff-for-column))
+ (widest
+ (apply max 0 lengths-for-column)))
+ (+ dist (/ widest (if (= x-align 0) 2 1)))))
+ (else dist))
+ X)))
+ ;; get a list of rows using `ly:stencil-add' on a list of stencils
+ (rows
+ (map
+ (lambda (stil-list)
+ (apply ly:stencil-add
+ (map
+ ;; the procedure creating the stencils:
+ stencils-for-row-proc
+ ;; the procedure's args:
+ stil-list
+ dist-sequence
+ (iota columns)
+ column-align)))
+ stils)))
+ (space-lines baseline-skip rows)))
+
(define-markup-list-command (map-markup-commands layout props compose args)
(procedure? markup-list?)
"This applies the function @var{compose} to every markup in
projects / lilypond.git / blobdiff