-;; return that part of LIST for which PRED is true.
-(define (filter-list pred? list)
- (if (null? list) '()
- (let* (
- (rest (filter-list pred? (cdr list)))
- )
- (if (pred? (car list))
- (cons (car list) rest)
- rest
- )
- )
- )
- )
-
-;;;;;;;;; TODO TODO . (should not use filtering?)
-;; this is bad, since we generate garbage every font-lookup.
-;; otoh, if the qualifiers is narrow enough , we don't generate much garbage.
-
-
-;; return those descriptions from FONT-DESCR-LIST whose FIELD-NAME matches VALUE
-(define (filter-field field-name value font-descr-alist)
- (filter-list
- (lambda (x) (eq? value (font-field field-name (car x))))
- font-descr-alist)
- )
-
-(define paper20-style-sheet-alist
- '(
- ((0 medium upright music feta 20) . "feta20")
- ((-1 medium upright music feta 16) . "feta16")
- ((-2 medium upright music feta 13) . "feta13")
- ((-3 medium upright music feta 13) . "feta11")
- ((-4 medium upright music feta 13) . "feta11")
- ((1 medium upright music feta 23) . "feta23")
- ((2 medium upright music feta 26) . "feta26")
- ((0 medium upright braces feta-braces 20) . "feta-braces20")
- ((0 medium italic roman cmti 10) . "cmti10")
- ((1 medium italic roman cmti 12) . "cmti12")
- ((3 bold italic dynamic feta 10) . "feta-din13")
- ((2 bold italic dynamic feta 10) . "feta-din13")
- ((1 bold italic dynamic feta 10) . "feta-din12")
- ((0 bold italic dynamic feta 10) . "feta-din10")
- ((-1 bold italic dynamic feta 10) . "feta-din8")
- ((-2 bold italic dynamic feta 10) . "feta-din7")
- ((-3 bold italic dynamic feta 10) . "feta-din6")
- ((-4 bold italic dynamic feta 10) . "feta-din5")
- ((-5 bold italic dynamic feta 10) . "feta-din4")
- ((3 medium upright number feta-nummer 13) . "feta-nummer13")
- ((2 medium upright number feta-nummer 13) . "feta-nummer13")
- ((1 medium upright number feta-nummer 12) . "feta-nummer12")
- ((0 medium upright number feta-nummer 10) . "feta-nummer10")
- ((-1 medium upright number feta-nummer 8) . "feta-nummer8")
- ((-2 medium upright number feta-nummer 6) . "feta-nummer6")
- ((-3 medium upright number feta-nummer 5) . "feta-nummer5")
- ((-4 medium upright number feta-nummer 4) . "feta-nummer4")
- ((0 medium upright roman cmr 10) . "cmr10")
- ((1 medium upright roman cmr 12) . "cmr12")
- ((-1 medium upright roman cmr 8) . "cmr8" )
- ((-2 medium upright roman cmr 7) . "cmr7" )
- ((-3 medium upright roman cmr 6) . "cmr6" )
- ((-4 medium upright roman cmr 5) . "cmr5" )
- ((-5 medium upright roman cmr 4) . "cmr4" )
- ((2 bold upright roman cmbx 10) . "cmbx10")
- ((1 bold upright roman cmbx 12) . "cmbx12")
- ((-3 medium upright math msam 10) . "msam10")
- ((-2 medium upright math msam 10) . "msam10")
- ((-1 medium upright math msam 10) . "msam10")
- ((0 medium upright math msam 10) . "msam10")
- ))
-
-
-;; return a FONT-DESCR with relative size incremented by INCREMENT
-(define (change-relative-size font-desc increment)
- (cons (+ increment (car font-desc)) (cdr font-desc))
- )
-
-;; map a function FUNC over the keys of an alist LIST, leaving the vals.
-(define (map-alist-keys func list)
- (if (null? list)
- '()
- (cons (cons (func (caar list)) (cdar list))
- (map-alist-keys func (cdr list)))
- ))
-
-;; map a function FUNC over the vals of LIST, leaving the keys.
-(define (map-alist-vals func list)
- (if (null? list)
- '()
- (cons (cons (caar list) (func (cdar list)))
- (map-alist-vals func (cdr list)))
- ))
-
-(define (change-style-sheet-relative-size sheet x)
- (map-alist-keys (lambda (descr) (change-relative-size descr x)) sheet))
-
-
-;; make style sheet for each paper version.
-(define style-sheet-alist
- (map-alist-vals (lambda (x) (change-style-sheet-relative-size
- paper20-style-sheet-alist x))
- '((paper11 . -3)
- (paper13 . -2)
- (paper16 . -1)
- (paper20 . 0)
- (paper23 . 1)
- (paper26 . 2)
- ))
- )
-
-
-(define (font-regexp-to-font-name paper regexp)
- (let ((style-sheet (cdr (assoc paper style-sheet-alist))))
- (let loop ((fonts style-sheet))
- (if (string-match regexp (caar fonts))
- (cdar fonts)
- (if (pair? (cdr fonts))
- (loop (cdr fonts))
- '())))))
-
-;; reduce the font list by successively applying a font-qualifier.
-(define (qualifiers-to-fontname qualifiers font-descr-alist)
- (if (null? qualifiers)
- (if (null? font-descr-alist)
- ""
- (cdar font-descr-alist)) ; return the topmost.
-
- (qualifiers-to-fontname
- (cdr qualifiers)
- (filter-field (caar qualifiers) (cdar qualifiers) font-descr-alist)
- )
- ))
-
-(define (properties-to-font-name paper properties-alist)
- (let* (
- (fonts (cdr (assoc paper style-sheet-alist)))
-
- ;; change order to change priorities of qualifiers.
- (q-order '(font-name font-family font-series font-shape font-point-size font-relative-size))
- (rawqualifiers (map (lambda (x) (assoc x properties-alist))
- q-order))
-
- (qualifiers (filter-list pair? rawqualifiers))
- (fontnm (qualifiers-to-fontname qualifiers fonts))
- (err (current-error-port))
- )
-
- (if (eq? fontnm "")