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#lang racket/base
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(require sugar/unstable/dict
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sugar/unstable/contract
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sugar/unstable/stub
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racket/contract)
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(provide (all-defined-out))
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#|
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https://github.com/mbutterick/fontkit/blob/master/src/layout/Script.js
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|#
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;; This maps the Unicode Script property to an OpenType script tag
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;; Data from http://www.microsoft.com/typography/otspec/scripttags.htm
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;; and http://www.unicode.org/Public/UNIDATA/PropertyValueAliases.txt.
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(define UNICODE_SCRIPTS
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(apply mhash
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'(Caucasian_Albanian aghb
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Arabic arab
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Imperial_Aramaic armi
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Armenian armn
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Avestan avst
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Balinese bali
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Bamum bamu
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Bassa_Vah bass
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Batak batk
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Bengali '(bng2 beng)
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Bopomofo bopo
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Brahmi brah
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Braille brai
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Buginese bugi
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Buhid buhd
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Chakma cakm
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Canadian_Aboriginal cans
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Carian cari
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Cham cham
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Cherokee cher
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Coptic copt
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Cypriot cprt
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Cyrillic cyrl
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Devanagari '(dev2 deva)
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Deseret dsrt
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Duployan dupl
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Egyptian_Hieroglyphs egyp
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Elbasan elba
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Ethiopic ethi
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Georgian geor
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Glagolitic glag
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Gothic goth
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Grantha gran
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Greek grek
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Gujarati '(gjr2 gujr)
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Gurmukhi '(gur2 guru)
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Hangul hang
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Han hani
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Hanunoo hano
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Hebrew hebr
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Hiragana hira
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Pahawh_Hmong hmng
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Katakana_Or_Hiragana hrkt
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Old_Italic ital
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Javanese java
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Kayah_Li kali
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Katakana kana
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Kharoshthi khar
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Khmer khmr
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Khojki khoj
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Kannada '(knd2 knda)
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Kaithi kthi
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Tai_Tham lana
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Lao lao
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Latin latn
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Lepcha lepc
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Limbu limb
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Linear_A lina
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Linear_B linb
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Lisu lisu
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Lycian lyci
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Lydian lydi
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Mahajani mahj
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Mandaic mand
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Manichaean mani
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Mende_Kikakui mend
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Meroitic_Cursive merc
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Meroitic_Hieroglyphs mero
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Malayalam '(mlm2 mlym)
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Modi modi
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Mongolian mong
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Mro mroo
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Meetei_Mayek mtei
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Myanmar '(mym2 mymr)
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Old_North_Arabian narb
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Nabataean nbat
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Nko nko
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Ogham ogam
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Ol_Chiki olck
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Old_Turkic orkh
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Oriya orya
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Osmanya osma
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Palmyrene palm
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Pau_Cin_Hau pauc
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Old_Permic perm
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Phags_Pa phag
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Inscriptional_Pahlavi phli
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Psalter_Pahlavi phlp
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Phoenician phnx
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Miao plrd
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Inscriptional_Parthian prti
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Rejang rjng
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Runic runr
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Samaritan samr
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Old_South_Arabian sarb
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Saurashtra saur
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Shavian shaw
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Sharada shrd
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Siddham sidd
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Khudawadi sind
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Sinhala sinh
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Sora_Sompeng sora
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Sundanese sund
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Syloti_Nagri sylo
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Syriac syrc
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Tagbanwa tagb
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Takri takr
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Tai_Le tale
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New_Tai_Lue talu
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Tamil taml
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Tai_Viet tavt
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Telugu '(tel2 telu)
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Tifinagh tfng
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Tagalog tglg
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Thaana thaa
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Thai thai
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Tibetan tibt
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Tirhuta tirh
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Ugaritic ugar
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Vai vai
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Warang_Citi wara
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Old_Persian xpeo
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Cuneiform xsux
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Yi yi
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Inherited zinh
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Common zyyy
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Unknown zzzz)))
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(define/contract (fromUnicode script)
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((option/c symbol?) . -> . symbol?)
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(hash-ref UNICODE_SCRIPTS script #f))
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(define-stub-stop forString)
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(define-stub-stop forCodePoints)
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(define RTL '( arab ;; Arabic
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hebr ;; Hebrew
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syrc ;; Syriac
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thaa ;; Thaana
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cprt ;; Cypriot Syllabary
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khar ;; Kharosthi
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phnx ;; Phoenician
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|nko | ;; N'Ko
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lydi ;; Lydian
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avst ;; Avestan
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armi ;; Imperial Aramaic
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phli ;; Inscriptional Pahlavi
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prti ;; Inscriptional Parthian
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sarb ;; Old South Arabian
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orkh ;; Old Turkic, Orkhon Runic
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samr ;; Samaritan
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mand ;; Mandaic, Mandaean
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merc ;; Meroitic Cursive
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mero ;; Meroitic Hieroglyphs
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;; Unicode 7.0 (not listed on http://www.microsoft.com/typography/otspec/scripttags.htm)
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mani ;; Manichaean
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mend ;; Mende Kikakui
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nbat ;; Nabataean
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narb ;; Old North Arabian
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palm ;; Palmyrene
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phlp ;; Psalter Pahlavi
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))
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(define (direction script)
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(if (memq script RTL) 'rtl 'ltr))
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