Taha-Mahmoodi b563976b4d Text: OpenType feature values (salt=2), a GSUB reader and runs that differ only in features shaped as one piece ...

Features take a value (tag=N) in style commands, SVG and native files. Runs that
differ only in their feature lists are shaped in one buffer with ranged features, so
an alternate on one letter of an Arabic word keeps the word joined. FontFace reads
GSUB once (alternate sets, singles, the feature reaching a glyph), names unencoded
glyphs, and alternates_in_context finds a character's alternates in its word.
text.setRangeStyle takes glyphAlternate: null.

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..

examples

Render: a long dashed stroke is outlined only near the view after an edit

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src

Text: OpenType feature values (salt=2), a GSUB reader and runs that differ only in features shaped as one piece

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tests

.ai import: legacy type keeps its writing direction, Tate-chu-yoko runs and upright Roman characters

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Cargo.toml

PDF/.ai import: the file is read and checked once when it opens

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