3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 2003--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
7 (define-public (stack-stencils axis dir padding stils)
8 "Stack stencils STILS in direction AXIS,DIR, using PADDING."
12 (ly:stencil-combine-at-edge
13 (car stils) axis dir (stack-stencils axis dir padding (cdr stils))
16 (define-public (stack-lines dir padding baseline stils)
17 "Stack vertically with a baseline-skip."
20 (if (null? (cdr stils))
22 (ly:stencil-combine-at-edge
24 (stack-lines dir padding baseline (cdr stils))
27 (define-public (fontify-text font-metric text)
28 "Set TEXT with font FONT-METRIC, returning a stencil."
29 (let* ((b (ly:text-dimension font-metric text)))
31 (ly:fontify-atom font-metric `(text ,text)) (car b) (cdr b))))
33 (define-public (bracketify-stencil stil axis thick protusion padding)
34 "Add brackets around STIL, producing a new stencil."
36 (let* ((ext (ly:stencil-get-extent stil axis))
37 (lb (ly:bracket axis ext thick (- protusion)))
38 (rb (ly:bracket axis ext thick protusion)))
40 (ly:stencil-combine-at-edge stil (other-axis axis) 1 lb padding))
42 (ly:stencil-combine-at-edge stil (other-axis axis) -1 rb padding))
45 (define-public (make-filled-box-stencil xext yext)
49 (list 'filledbox (- (car xext)) (cdr xext)
50 (- (car yext)) (cdr yext))
54 (define-public (box-grob-stencil grob)
55 "Make a box of exactly the extents of the grob. The box precisely
56 encloses the contents.
58 (let* ((xext (ly:grob-extent grob grob 0))
59 (yext (ly:grob-extent grob grob 1))
63 (make-filled-box-stencil xext (cons (- (car yext) thick) (car yext)))
64 (make-filled-box-stencil xext (cons (cdr yext) (+ (cdr yext) thick)))
65 (make-filled-box-stencil (cons (cdr xext) (+ (cdr xext) thick)) yext)
66 (make-filled-box-stencil (cons (- (car xext) thick) (car xext)) yext))))
68 ;; TODO merge this and prev function.
69 (define-public (box-stencil stil thick padding)
70 "Add a box around STIL, producing a new stencil."
71 (let* ((x-ext (interval-widen (ly:stencil-get-extent stil 0) padding))
72 (y-ext (interval-widen (ly:stencil-get-extent stil 1) padding))
73 (y-rule (make-filled-box-stencil (cons 0 thick) y-ext))
74 (x-rule (make-filled-box-stencil (interval-widen x-ext thick)
77 (set! stil (ly:stencil-combine-at-edge stil X 1 y-rule padding))
78 (set! stil (ly:stencil-combine-at-edge stil X -1 y-rule padding))
79 (set! stil (ly:stencil-combine-at-edge stil Y 1 x-rule 0.0))
80 (set! stil (ly:stencil-combine-at-edge stil Y -1 x-rule 0.0))