109 lines
2.4 KiB
JavaScript
109 lines
2.4 KiB
JavaScript
"use strict";
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class GlyphStore {
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constructor() {
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this.nameForward = new Map();
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this.nameBackward = new Map();
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this.encodingForward = new Map();
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this.encodingBackward = new Map();
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}
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glyphs() {
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return this.nameForward.values();
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}
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namedEntries() {
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return this.nameForward.entries();
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}
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*indexedNamedEntries() {
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let i = 0;
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for (const [name, g] of this.nameForward.entries()) {
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yield [i, name, g];
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i++;
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}
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}
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addGlyph(name, g) {
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this.nameForward.set(name, g);
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this.nameBackward.set(g, name);
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}
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queryByName(name) {
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return this.nameForward.get(name);
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}
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queryNameOf(g) {
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return this.nameBackward.get(g);
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}
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deleteGlyph(g) {
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const name = this.nameBackward.get(g);
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this.nameBackward.delete(g);
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if (name) this.nameForward.delete(g);
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this.deleteUnicodeAssignmentsOf(g);
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}
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deleteGlyphByName(name) {
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const g = this.nameForward.get(name);
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this.nameForward.delete(g);
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if (g) {
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this.nameBackward.delete(g);
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this.deleteUnicodeAssignmentsOf(g);
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}
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}
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encodeGlyph(u, g) {
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this.encodingForward.set(u, g);
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let s = this.encodingBackward.get(g);
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if (!s) {
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s = new Set();
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this.encodingBackward.set(g, s);
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}
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s.add(u);
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}
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queryByUnicode(u) {
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return this.encodingForward.get(u);
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}
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queryNameOfUnicode(u) {
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const g = this.queryByUnicode(u);
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if (!g) return undefined;
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return this.queryNameOf(g);
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}
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queryUnicodeOf(g) {
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const s = this.encodingBackward.get(g);
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if (!s || !s.size) return null;
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return s;
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}
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queryUnicodeOfName(name) {
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const g = this.queryByName(name);
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if (!g) return undefined;
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return this.queryUnicodeOf(g);
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}
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queryUnicodeArrayOfName(name) {
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return [...this.queryUnicodeOfName(name)];
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}
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deleteUnicodeAssignmentsOf(g) {
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const s = this.nameBackward.get(g);
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if (s) for (const u of s) this.encodingForward.delete(u);
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this.encodingBackward.delete(g);
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}
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filterByName(nameSet) {
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const gs1 = new GlyphStore();
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for (const [name, g] of this.nameForward) {
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if (!nameSet.has(name)) continue;
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gs1.addGlyph(name, g);
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const us = this.encodingBackward.get(g);
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if (us) for (const u of us) gs1.encodeGlyph(u, g);
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}
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return gs1;
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}
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filterByGlyph(glyphSet) {
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const gs1 = new GlyphStore();
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for (const [name, g] of this.nameForward) {
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if (!glyphSet.has(g)) continue;
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gs1.addGlyph(name, g);
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const us = this.encodingBackward.get(g);
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if (us) for (const u of us) gs1.encodeGlyph(u, g);
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}
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return gs1;
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}
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}
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module.exports = GlyphStore;
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