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import r from '@foliojs-fork/restructure';
import {getEncoding, LANGUAGES} from '../encodings';
let NameRecord = new r.Struct({
platformID: r.uint16,
encodingID: r.uint16,
languageID: r.uint16,
nameID: r.uint16,
length: r.uint16,
string: new r.Pointer(r.uint16,
new r.String('length', t => getEncoding(t.platformID, t.encodingID, t.languageID)),
{ type: 'parent', relativeTo: ctx => ctx.parent.stringOffset, allowNull: false }
)
});
let LangTagRecord = new r.Struct({
length: r.uint16,
tag: new r.Pointer(r.uint16, new r.String('length', 'utf16be'), {type: 'parent', relativeTo: ctx => ctx.stringOffset})
});
var NameTable = new r.VersionedStruct(r.uint16, {
0: {
count: r.uint16,
stringOffset: r.uint16,
records: new r.Array(NameRecord, 'count')
},
1: {
count: r.uint16,
stringOffset: r.uint16,
records: new r.Array(NameRecord, 'count'),
langTagCount: r.uint16,
langTags: new r.Array(LangTagRecord, 'langTagCount')
}
});
export default NameTable;
const NAMES = [
'copyright',
'fontFamily',
'fontSubfamily',
'uniqueSubfamily',
'fullName',
'version',
'postscriptName', // Note: A font may have only one PostScript name and that name must be ASCII.
'trademark',
'manufacturer',
'designer',
'description',
'vendorURL',
'designerURL',
'license',
'licenseURL',
null, // reserved
'preferredFamily',
'preferredSubfamily',
'compatibleFull',
'sampleText',
'postscriptCIDFontName',
'wwsFamilyName',
'wwsSubfamilyName'
];
NameTable.process = function(stream) {
var records = {};
for (let record of this.records) {
// find out what language this is for
let language = LANGUAGES[record.platformID][record.languageID];
if (language == null && this.langTags != null && record.languageID >= 0x8000) {
language = this.langTags[record.languageID - 0x8000].tag;
}
if (language == null) {
language = record.platformID + '-' + record.languageID;
}
// if the nameID is >= 256, it is a font feature record (AAT)
let key = record.nameID >= 256 ? 'fontFeatures' : (NAMES[record.nameID] || record.nameID);
if (records[key] == null) {
records[key] = {};
}
let obj = records[key];
if (record.nameID >= 256) {
obj = obj[record.nameID] || (obj[record.nameID] = {});
}
if (typeof record.string === 'string' || typeof obj[language] !== 'string') {
obj[language] = record.string;
}
}
this.records = records;
};
NameTable.preEncode = function() {
if (Array.isArray(this.records)) return;
this.version = 0;
let records = [];
for (let key in this.records) {
let val = this.records[key];
if (key === 'fontFeatures') continue;
records.push({
platformID: 3,
encodingID: 1,
languageID: 0x409,
nameID: NAMES.indexOf(key),
length: Buffer.byteLength(val.en, 'utf16le'),
string: val.en
});
if (key === 'postscriptName') {
records.push({
platformID: 1,
encodingID: 0,
languageID: 0,
nameID: NAMES.indexOf(key),
length: val.en.length,
string: val.en
});
}
}
this.records = records;
this.count = records.length;
this.stringOffset = NameTable.size(this, null, false);
};