3 ;; As an excercise, do it with records.
4 ;; Should use GOOPS, really.
6 (define font-tree-record
9 '(qualifier default children)))
11 (define-public font-tree-node?
12 (record-predicate font-tree-record))
13 (define-public font-tree-default
14 (record-accessor font-tree-record 'default))
15 (define-public font-tree-qualifier
16 (record-accessor font-tree-record 'qualifier))
17 (define-public font-tree-children
18 (record-accessor font-tree-record 'children))
21 (define (make-font-tree-node
23 ((record-constructor font-tree-record)
26 (make-hash-table 11))) ;ugh. hardcoded.
28 (define default-qualifier-order
29 '(font-encoding font-family font-shape font-series))
32 (define-public (add-font node fprops size-family)
33 (define (assoc-delete key alist)
34 (assoc-remove! (list-copy alist) key))
35 (define (make-node fprops size-family)
39 ((qual (next-qualifier default-qualifier-order fprops)))
40 (make-font-tree-node qual
41 (assoc-get qual fprops)))
43 (define (next-qualifier order props)
45 ((and (null? props) (null? order))
47 ((null? props) (car order))
48 ((null? order) (caar props))
50 (if (assoc-get (car order) props)
52 (next-qualifier (cdr order) props))
55 (if (font-tree-node? node)
57 ((q (font-tree-qualifier node))
58 (d (font-tree-default node))
59 (v (assoc-get q fprops d))
60 (new-fprops (assoc-delete q fprops))
61 (child (hashq-ref (font-tree-children node)
67 (set! child (make-node new-fprops size-family))
68 (hashq-set! (font-tree-children node) v child)))
70 (add-font child new-fprops size-family))
71 (if (not (equal? size-family node))
72 (throw 'invalid-font props size-family)))
75 (define-public (display-font-node node . rest)
77 ((port (if (pair? rest) (car rest) (current-output-port)))
80 ((font-tree-node? node)
86 "Font_node { \nqual: "
87 (font-tree-qualifier node)
89 (font-tree-default node)
94 (display (car x) port)
96 (display-font-node (cdr x) port))
97 (hash-table->alist (font-tree-children node)))
101 (display node port))))
104 (define-public (scale-font-node node factor)
106 ((font-tree-node? node)
107 (hash-for-each (lambda (k v)
108 (scale-font-tree v factor)
109 (font-tree-children node))))
111 (cons (* factor (car node))
114 (define-public (lookup-font node alist-chain)
116 ((font-tree-node? node)
118 ((qual (font-tree-qualifier node))
119 (def (font-tree-default node))
120 (val (chain-assoc-get qual alist-chain def))
121 (desired-font (lookup-font
122 (hashq-ref (font-tree-children node)
124 (font (if desired-font
126 (lookup-font (hashq-ref (font-tree-children node)
136 (define-public paper20-font-tree (make-font-tree-node 'font-encoding 'music))
142 '((font-encoding . number))
143 '(10 . #((4.0 . "feta-nummer4")
144 (6.0 . "feta-nummer6")
145 (8.0 . "feta-nummer8")
146 (10.0 . "feta-nummer10")
147 (12.0 . "feta-nummer12")
148 (16.0 . "feta-nummer16"))))
152 '((font-encoding . dynamic))
153 '(14.0 . #((6.0 . "feta-din6")
155 (10.0 . "feta-din10")
156 (12.0 . "feta-din12")
157 (14.0 . "feta-din14")
158 (17.0 . "feta-din17")
161 (use-modules (ice-9 readline))
169 `((font-encoding . text)
170 (font-series . ,(vector-ref (car x) 0))
171 (font-shape . ,(vector-ref (car x) 1))
172 (font-family . ,(vector-ref (car x) 2)))
176 (#(roman upright medium) .
177 (10.0 . #((6.0 . "cmr6")
185 (#(roman upright bold) .
186 (10.0 . #((6.0 . "cmbx6")
192 (#(roman italic medium) .
193 (10.0 . #((7.0 . "cmti7")
197 (#(roman italic bold) .
198 (10.0 . #((8.0 . "cmbxti8")
203 (#(roman caps medium) .
204 (10.0 . #((10.0 . "cmcsc10"))))
206 (#(roman upright bold-narrow ) .
207 (10.0 . #((10.0 . "cmb10")
210 (#(sans upright medium) .
211 (10.0 . #((8.0 . "cmss8")
216 (#(typewriter upright medium) .
217 (10.0 . #((8.0 . "cmtt8")
227 '((font-encoding . math))
228 '(10.0 . #((10.0 . "msam10"))))
232 '((font-encoding . music))
233 '(20.0 . #((11.22 . ("feta11" "parmesan11"))
234 (12.60 . ("feta13" "parmesan13"))
235 (14.14 . ("feta14" "parmesan14"))
236 (15.87 . ("feta16" "parmesan16"))
237 (17.82 . ("feta18" "parmesan18"))
238 (20.0 . ("feta20" "parmesan20"))
239 (22.45 . ("feta23" "parmesan23"))
240 (25.20 . ("feta26" "parmesan26"))
245 '((font-encoding . braces))
246 '(10 . #((10.0 . ("feta-braces00"
258 (display-font-node paper20-font-tree )
266 '(((font-encoding . text)
267 (font-shape . italic)
276 (define (scale-font-tree root factor)
277 "Scale ROOT with FACTOR."
279 ((and (font-tree-node? node)
280 (equal? (font-tree-qualifier node) 'font-encoding))
281 (hash-for-each (lambda (k v)
282 (if (not (equal? k 'braces))
283 (scale-font-node v factor))
284 (font-tree-children node))))
286 (scale-font-node node))))