support system fonts

main
Matthew Butterick 5 years ago
parent 0a193f1a98
commit 9bc3349f79

@ -780,7 +780,7 @@ The optional @racket[compress?] argument controls whether data inside the result
A design goal of Quadwriter is to treat document layout as the result of a program. Along those lines, fonts are handled differently than usual. When you use a word processor, you choose from whatever fonts might be installed on your system.
Quadwriter, by contrast, relies only on fonts that are @emph{in the same directory} as your other project source files. This is a feature: it means that everything necessary to render the document travels together in the same directory. You can re-render it anywhere with identical results. You never have the problem — still with us after 35 years of desktop word processing — that ``oh, you need to install such-and-such font in your system before it will work.'' Bah!
Quadwriter, by contrast, prefers to rely on fonts that are @emph{in the same directory} as your other project source files. This is a feature: it means that everything necessary to render the document can travel together in the same directory. You can re-render it anywhere with identical results. You never have the problem — still with us after 35 years of desktop word processing — that ``oh, you need to install such-and-such font in your system before it will work.'' Bah!
Quadwriter supports the usual TrueType (@racket[.ttf]) and OpenType (@racket[.otf]) font files. It also supports WOFF files (@racket[.woff]). To add fonts to your Quadwriter experience:
@ -837,6 +837,11 @@ Fallback only. Used for math symbols not present in the currently selected font.
Fallback only. Used for other glyphs not present in the currently selected font.
}
@subsubsection{System fonts}
Yes, if you're feeling lazy, you can use the name of a system font family in any field that takes a family name, and Quad will comply. But if you do this, bear in mind that your document will no longer necessarily be portable between systems, because it depends on a certain font already being available on that system. I include this option because I can imagine plenty of uses for Quad where ease outweighs portability. In which case, have at it.
@subsection{Colors}
A @deftech{hex color} is a case-insensitive string of six hex digits prefixed with @litchar{#}, such as @racket["#fe456a"] or @racket["#cc6633"]. The pairs of digits represent the red, green, and blue components of the color respectively, each pair taking on hex values between 0 (@racket["00"]) and 255 (@racket["ff"]), inclusive. As optional shorthand, a three-digit hex color such as @racket["#c63"] is equivalent to @racket["#cc6633"].

@ -3,6 +3,7 @@
racket/string
racket/path
racket/match
fontland/font-path
"attrs.rkt")
(provide (all-defined-out))
@ -58,16 +59,33 @@
(define (font-attrs->path font-family bold italic)
;; find the font-path corresponding to a certain family name and style.
(define key (cons (string-downcase font-family)
(cond
[(and bold italic) 'bi]
[bold 'b]
[italic 'i]
[else 'r])))
(define regular-key (cons font-family 'r))
(define (make-key font-family [bold #f] [italic #f])
(cons (string-downcase font-family)
(cond
[(and bold italic) 'bi]
[bold 'b]
[italic 'i]
[else 'r])))
(define key (make-key font-family bold italic))
(define regular-key (make-key font-family))
(cond
[(hash-ref font-paths key #false)]
[(hash-ref font-paths regular-key #false)]
;; if it's not already in font paths, it might be a system font
;; we use `family->path` to try to resolve the ribbi styles
;; if the font is a system font, we will end up with paths.
;; if it's not, we will end up with #false for those entries in `font-paths`,
;; and fall through to the default font.
[(let ()
(unless (hash-has-key? font-paths regular-key)
(for* ([bold (in-list (list #false #true))]
[italic (in-list (list #false #true))])
(hash-set! font-paths
(make-key font-family bold italic)
(family->path font-family #:bold bold #:italic italic))))
(cond
[(hash-ref font-paths key #false)]
[else (hash-ref font-paths regular-key #false)]))]
[else default-font-face]))
(define (resolve-font-path! attrs)

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