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46 lines
1.9 KiB
Racket
46 lines
1.9 KiB
Racket
#lang racket/base
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(require "core.rkt")
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(provide (all-defined-out))
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(define (make-css-ot-features feature-tags [feature-values 1])
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; if single value provided, upconvert to list
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(when (not (list? feature-tags))
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(set! feature-tags (list feature-tags)))
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; same here: convert single value into list
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(when (not (list? feature-values))
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(let ([single-value feature-values])
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(set! feature-values (make-list (len feature-tags) single-value))))
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; use single quotes in the formatter because css string might be used in an inline tag
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; with form style="[string]" so double quotes are irritating
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(define feature-tag-string (string-join (map (λ(tag value) (format "'~a' ~a" tag value)) feature-tags feature-values) ", "))
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; I hate accommodating old browsers but I'll make an exception because OT support is
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; critical to most MB projects
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; if this comes before new-style -moz- declaration, it will work for all.
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(define feature-tag-string-old-firefox (string-join (map (λ(tag value) (format "'~a=~a'" tag value)) feature-tags feature-values) ", "))
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(define feature-tag-property "font-feature-settings")
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(join-css-strings (append
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(make-css-strings '("-moz-") feature-tag-property feature-tag-string-old-firefox)
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(make-css-strings css-property-prefixes feature-tag-property feature-tag-string))))
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(define (make-css-hyphens [value "auto"])
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(join-css-strings (make-css-strings css-property-prefixes "hyphens" value)))
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(define (make-css-small-caps)
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(join-css-strings (list "text-transform: lowercase" (make-css-ot-features "c2sc"))))
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(define (make-css-caps)
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(join-css-strings (list "text-transform: uppercase" (make-css-ot-features "case"))))
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(define (make-css-kerning)
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(join-css-strings (list "text-rendering: optimizeLegibility" (make-css-ot-features "kern"))))
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(define (make-css-ligatures)
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(join-css-strings (list "text-rendering: optimizeLegibility" (make-css-ot-features "liga")))) |