getSingle top-level property

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

Implementation

Substitution.prototype.getSingle = function(feature, script, language) {
    const substitutions = [];
    const lookupTables = this.getLookupTables(script, language, feature, 1);
    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);
            let j;
            if (subtable.substFormat === 1) {
                const delta = subtable.deltaGlyphId;
                for (j = 0; j < glyphs.length; j++) {
                    const glyph = glyphs[j];
                    substitutions.push({ sub: glyph, by: glyph + delta });
                }
            } else {
                const substitute = subtable.substitute;
                for (j = 0; j < glyphs.length; j++) {
                    substitutions.push({ sub: glyphs[j], by: substitute[j] });
                }
            }
        }
    }
    return substitutions;
};