Add support for IPA affricate ligatures #174
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pauldhunt
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Feb 3, 2020
Adds characters for U/udieresisbelow to address issue #184. Updates GSUB features to prevent alternates from blocking formation of small capitals, addressing issue #183. Adds double circumflex and double macron above to address issue #179. Attempts to resolve issues with combining dot above right to address issue #178, however there is still some remaining funniness in interaction with text engines and how the character string is formed. Adds characters for IPA affricate ligatures dzed, dzcurl, tccurl, dzretroflex & tshook to address issue #174. Converts Sources to UFO version 3 to address issue #148. Adds heavy quote ornaments because I like using them as ‘scare’ quotes.
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Fixed in version 3.028. |
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The representation of affricate consonants in the IPA is somewhat problematic. Because they indicate a transition between a stop and a fricative articulation, they’re prototypically represented with sequences of two symbols: [ts tʃ dz dʒ] etc. However, because some languages distinguish stop-fricative sequences from actual affricates, several solutions have been proposed. The one currently accepted by the IPA is to connect both glyphs with a tie bar: [t͡s d͡z] etc., but ligatures such as [ʦ ʣ] etc. are still very often seen in the literature, especially in dictionaries and in Chinese linguistics. Source Sans currently supports two of these: U+02A4 ʤ and U+02A7 ʧ.
Still missing are:
U+02A3 ʣ (= [d͡z]),
U+02A5 ʥ (= [d͡ʑ]),
U+AB66 ꭦ (= [d͡ʐ], added in Unicode 12.0),
U+02A6 ʦ (= [t͡s]),
U+02A8 ʨ (= [t͡ɕ]),
U+AB67 ꭧ (= [t͡ʂ], added in Unicode 12.0).
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