getAlternates top-level property

List Function(dynamic feature, dynamic script, dynamic language) getAlternates

Implementation

Substitution.prototype.getAlternates = function(feature, script, language) {
    const alternates = [];
    const lookupTables = this.getLookupTables(script, language, feature, 3);
    for (let idx = 0; idx < lookupTables.length; idx++) {
        const subtables = lookupTables[idx].subtables;
        for (let i = 0; i < subtables.length; i++) {
            const subtable = subtables[i];
            const glyphs = this.expandCoverage(subtable.coverage);
            const alternateSets = subtable.alternateSets;
            for (let j = 0; j < glyphs.length; j++) {
                alternates.push({ sub: glyphs[j], by: alternateSets[j] });
            }
        }
    }
    return alternates;
};