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(import (scheme char)
(chibi)
(chibi string)
(chibi sxml)
(srfi 1)
(srfi 9)
(srfi 41))
(define-record-type :glyph
(glyph char size color style)
glyph?
(char glyph-char glyph-set-char!)
(size glyph-size glyph-set-size!)
(color glyph-color glyph-set-color!)
(style glyph-style glyph-set-style!))
; Load here the glyphs you need, the only ones that are more or less defined
; are the English ones
(load "glyphs/en.scm")
(define a4-size '(297 . 210))
(define a5-size '(210 . 148))
(define a6-size '(148 . 105))
(define a7-size '(105 . 74))
(define page-size a7-size)
(define x car)
(define y cdr)
(define num number->string)
(define (mm i)
(string-append (num i) "mm"))
; Move this to a configuration file or something
(define sticker-radius 4); mm
(define style (string-append
"
text {
/*font-family: 'Unifont';*/
font-family: 'B612';
stroke: black;
stroke-width: 0.01;
}
.cuts {
fill: none;
stroke-width: 0.1;
stroke: grey;
}
"))
(define (honeycomb sticker-radius top-left bottom-right spacing)
"Return a function that generates positions for the stickers of size
`sticker-radius` distributed in a box with `top-left` and `bottom-right`
corners with `spacing` between them."
(let* ((current-x (+ spacing sticker-radius (x top-left)))
(current-y (+ spacing sticker-radius (y top-left)))
(first #t))
(lambda ()
(if first
(begin
(set! first #f)
(cons current-x current-y))
(begin
(set! current-x (+ spacing current-x (* 2 sticker-radius)))
(if (> (+ current-x sticker-radius spacing)
(x bottom-right))
(begin
(set! current-x (+ spacing sticker-radius (x top-left)))
(set! current-y (+ spacing current-y (* 2 sticker-radius)))
(if (> (+ current-y sticker-radius spacing)
(y bottom-right))
(error "Too many stickers for the provided space"))))
(cons current-x current-y))))))
(define (circle cx cy r class)
`(circle (@ (cx ,cx)
(cy ,cy)
(r ,r)
(class ,class))))
(define (rounded-rect cx cy w h r class)
`(rect (@ (x ,(- cx (/ w 2)))
(y ,(- cy (/ h 2)))
(width ,w)
(height ,h)
(rx ,r)
(ry ,r)
(class ,class))))
(define (text-unpositioned glyph)
"Returns a `text` object that is defined to be centered vertically and
horizontally wrapped in a procedure that must be called to provide it the
center position of the text. It gets a `glyph` record as an input."
(lambda (cx cy)
`(text (@ (x ,cx)
(y ,cy)
(style ,(string-append "font-style: " (glyph-style glyph)
"; font-size: " (glyph-size glyph)
"; fill: " (glyph-color glyph)))
(text-anchor middle)
(dominant-baseline central))
,(glyph-char glyph))))
(define stickers
(let ((pos (honeycomb sticker-radius '(0 . 0) page-size 1)))
(map
(lambda (contents)
(let ((position (pos)))
(cons
#;(circle
(x position)
(y position)
sticker-radius
"cuts")
(rounded-rect
(x position)
(y position)
(* 2 sticker-radius)
(* 2 sticker-radius)
1
"cuts")
(contents (x position) (y position)))))
(map text-unpositioned glyphs))))
(define cuts (map car stickers))
(define graphics (map cdr stickers))
(define (dump outport)
(display
"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>" outport)
(display
(sxml->xml
`(svg (@ (version "1.1")
(xmlns:inkscape "http://www.inkscape.org/namespaces/inkscape")
(width ,(mm (x page-size)))
(height ,(mm (y page-size)))
(viewBox ,(string-append "0 0 " (num (x page-size))
" " (num (y page-size)))))
(defs
(style ,style))
(g (@ (id cut)
(inkscape:groupmode layer)
(inkscape:label "Cortes"))
,@cuts)
(g (@ (id graph)
(inkscape:groupmode layer)
(inkscape:label "Gráficos"))
,@graphics)))
outport))
(define args (cdr (command-line)))
(if (< 0 (length args))
(call-with-output-file (car args) dump)
(dump (current-output-port)))
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