`ApplyGujaratiReorder`

Signature

function ApplyGujaratiReorder(const Wide: UnicodeString): UnicodeString;

Purpose

Applies the Gujarati reorder pre-pass to Wide and returns the reordered UnicodeString ready for cmap + GSUB consumption. Non-Gujarati content passes through byte-identical.

Reorder rules applied

R1 Repha: Ra (U+0AB0) + Halant (U+0ACD) + Consonant → (Ra, Halant) moves to syllable end.
R2 Pre-base matras: U+0ABF I moves to syllable start.
R3 Above-base matras: U+0AC5 CANDRA E, U+0AC7 E, U+0AC8 AI emit after the base block. Note Gujarati E/AI are above-base (like Devanagari), unlike Bengali where they are pre-base.
R4 Below-base matras: U+0AC1–U+0AC4 U/UU/Vocalic R/RR, U+0AE2–U+0AE3 Vocalic L/LL emit after above-base.
R5 Post-base matras: U+0ABE AA, U+0AC0 II, U+0AC9 CANDRA O, U+0ACB–U+0ACC O/AU emit after below-base.
No split matras in the Gujarati main block.

Output layout per syllable: [pre-matras] + [base + halant + nukta + bindu/visarga/modifier] + [above-matras] + [below-matras] + [post-matras] + [Repha: Ra Halant]?

Conjuncts (C + Halant + C) preserved in the base block. Single-pass and idempotent.

Example

var
  Wide: UnicodeString;
begin
  // Input: KA + AA(post) + U(below) + E(above) + I(pre)
  Wide:= Doc.ApplyGujaratiReorder(#$0A95#$0ABE#$0AC1#$0AC7#$0ABF);
  // Wide is now: I + KA + E + U + AA  (canonical 5-buffer order)
end;

Standards

Unicode 16.0 §12.6 (Gujarati)
Unicode 16.0 IndicSyllabicCategory.txt and IndicPositionalCategory.txt
ISO 32000-1 §9.10 (extraction of text content)
OpenType Gujarati shaping spec

Version history

v2.119.72 — Introduced in Phase 8f.3. Complete shaper (R1-R5; no split matras). Gujarati becomes third registered Indic script.

ApplyGujaratiReorder