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Prawn does not perform OpenType text shaping, so Arabic characters render as disconnected isolated glyphs. This adds a shaping module that converts Arabic characters to their Unicode Presentation Forms (initial/medial/final/isolated) before Prawn renders them. Features: - All standard Arabic letters (U+0621-U+064A) - Extended Arabic (Farsi, Urdu: Peh, Tcheh, Gaf, etc.) - Lam-Alef mandatory ligatures - Diacritical marks preservation - Intercepts all Prawn text methods via document singleton See also: prawnpdf/prawn#1392 for upstream PR
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Summary
Exports::PDF::Common::ArabicShapingmodule that converts Arabic characters to Unicode Presentation Forms based on joining contexttext,draw_text,formatted_text,text_box,make_cell) on the PDF document instanceContext
Arabic is a cursive script where characters must connect based on position. Prawn uses ttfunk for font parsing but does not run the OpenType shaping engine, rendering all Arabic characters in isolated form — completely unreadable.
Test plan