mirror of
https://github.com/kiliman/operator-mono-lig.git
synced 2026-08-12 02:10:52 +02:00
Initial import
This commit is contained in:
kiliman
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const Promise = require('bluebird');
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const fs = Promise.promisifyAll(require('fs'));
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const xpath = require('xpath');
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const { DOMParser, XMLSerializer } = require('xmldom');
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const format = require('xml-formatter');
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let fontName;
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let ligFontName;
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const regEx = /\.liga$/;
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const regExBlankLines = /^(?=\n)$|^\s*/gm;
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const regExWhitespace = /^\s+$/;
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const NodeType = {};
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NodeType.TEXT_NODE = 3;
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async function main() {
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fontName = process.argv[2] || 'OperatorMono-MediumItalic';
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ligFontName = fontName.split('-').join('Lig-');
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const srcFileName = `./original/${fontName}.ttx`;
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const dstFileName = `./build/${ligFontName}.ttx`;
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console.log(`Reading original font file ${srcFileName}`);
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const xml = await fs.readFileAsync(srcFileName, 'utf-8');
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const dom = new DOMParser().parseFromString(xml);
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await processPatch('names', patchNames, dom);
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await processPatch('glyphs', patchGlyphs, dom);
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await processPatch('cmap', patchCmap, dom);
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await processPatch('classdef', patchClassDef, dom);
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await processPatch('hmtx', patchHmtx, dom);
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await processPatch('lookup', patchLookup, dom);
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await processPatch('charstrings', patchCharStrings, dom);
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//return;
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console.log(`Writing ligature font file ${dstFileName}`);
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await fs.writeFileAsync(dstFileName, format(serialize(dom)));
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console.log('Done');
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}
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async function loadConfigAsync(name) {
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const fileName = `./ligature/${ligFontName}_${name}.xml`;
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const xml = await fs.readFileAsync(fileName, 'utf-8');
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return new DOMParser().parseFromString(xml);
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}
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async function processPatch(name, patchFunc, dom) {
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console.log(`Patching ${name}`);
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await patchFunc(dom);
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}
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async function patchNames(dom) {
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const configDom = await loadConfigAsync('names');
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const names = xpath.select('/name/namerecord', configDom);
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const targetName = xpath.select('/ttFont/name', dom, true);
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names.forEach(node => {
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const nameId = node.getAttribute('nameID');
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const platformId = node.getAttribute('platformID');
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// search for namerecord in target dom and replace with this one or append node
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const target = xpath.select(
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`/ttFont/name/namerecord[@nameID="${nameId}" and @platformID="${platformId}"]`,
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dom,
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true
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);
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if (target) {
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target.parentNode.replaceChild(node, target);
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} else {
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targetName.appendChild(node);
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}
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});
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}
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async function patchGlyphs(dom) {
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const configDom = await loadConfigAsync('glyphs');
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// get number of glyphs in target dom
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const targetGlyphs = xpath.select('/ttFont/GlyphOrder', dom, true);
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const glyphsCount = xpath.select('count(GlyphID)', targetGlyphs, true);
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let n = glyphsCount;
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// get ligature glyphs
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const glyphs = xpath.select('/GlyphOrder/GlyphID', configDom);
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glyphs.forEach(node => {
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node.setAttribute('id', n++);
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targetGlyphs.appendChild(node);
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});
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// update glyph count
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setAttribute(dom, '/ttFont/maxp/numGlyphs', 'value', n);
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}
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async function patchCmap(dom) {
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const configDom = await loadConfigAsync('cmap');
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const cmaps = xpath.select('/cmap/cmap_format_4', configDom);
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cmaps.forEach(node => {
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const platformId = node.getAttribute('platformID');
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const platEncId = node.getAttribute('platEncID');
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// search for cmap_format_4 in target dom
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const target = xpath.select(
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`/ttFont/cmap/cmap_format_4[@platformID="${platformId}" and @platEncID="${platEncId}"]`,
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dom,
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true
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);
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if (target) {
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// append all map elements to target cmap_format_4
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const maps = xpath.select('map', node);
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maps.forEach(child => target.appendChild(child));
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}
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});
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}
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async function patchClassDef(dom) {
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const configDom = await loadConfigAsync('classdef');
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const glyphClassDef = xpath.select('/ttFont/GDEF/GlyphClassDef', dom, true);
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const classDefs = xpath.select('/GlyphClassDef/ClassDefs', configDom);
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classDefs.forEach(node => glyphClassDef.appendChild(node));
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}
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async function patchHmtx(dom) {
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const hmtxDom = await loadConfigAsync('hmtx');
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const targetHmtx = xpath.select('/ttFont/hmtx', dom, true);
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const mtx = xpath.select('/hmtx/mtx', hmtxDom);
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mtx.forEach(node => targetHmtx.appendChild(node));
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const mtxCount = xpath.select('count(/ttFont/hmtx/mtx)', dom, true);
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setAttribute(dom, '/ttFont/hhea/numberOfHMetrics', 'value', mtxCount);
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const configDom = await loadConfigAsync('config');
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copyConfigAttribute(dom, configDom, '/ttFont/head/xMin', 'value');
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copyConfigAttribute(dom, configDom, '/ttFont/head/yMin', 'value');
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copyConfigAttribute(dom, configDom, '/ttFont/head/xMax', 'value');
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copyConfigAttribute(dom, configDom, '/ttFont/head/yMax', 'value');
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copyConfigAttribute(dom, configDom, '/ttFont/hhea/advanceWidthMax', 'value');
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copyConfigAttribute(dom, configDom, '/ttFont/hhea/xMaxExtent', 'value');
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copyConfigAttribute(dom, configDom, '/ttFont/CFF/CFFFont/FontBBox', 'value');
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copyConfigAttribute(
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dom,
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configDom,
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'/ttFont/CFF/CFFFont/Private/nominalWidthX',
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'value'
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);
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}
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async function patchLookup(dom) {
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const configDom = await loadConfigAsync('lookup');
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const featureList = xpath.select('/ttFont/GSUB/FeatureList', dom, true);
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// look for feature with FeatureTag liga
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let featureRecord;
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let featureTag;
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let feature;
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let featureTags = xpath.select(
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'/ttFont/GSUB/FeatureList/FeatureRecord/FeatureTag[@value="liga"]',
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dom
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);
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if (featureTags.length) {
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featureTag = featureTags[0];
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featureRecord = featureTag.parentNode;
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feature = xpath.select('Feature', featureRecord, true);
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} else {
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// need to add feature to FeatureList
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const featuresCount = xpath.select(
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'count(/ttFont/GSUB/FeatureList/FeatureRecord)',
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dom,
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true
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);
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featureRecord = dom.createElement('FeatureRecord');
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featureRecord.setAttribute('index', featuresCount);
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featureTag = dom.createElement('FeatureTag');
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featureTag.setAttribute('value', 'liga');
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feature = dom.createElement('Feature');
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featureRecord.appendChild(featureTag);
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featureRecord.appendChild(feature);
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featureList.appendChild(featureRecord);
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}
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let lookupListIndex = xpath.select(
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'LookupListIndex[@value="20"]',
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feature,
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true
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);
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if (!lookupListIndex) {
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const count = xpath.select('count(LookupListIndex)', feature, true);
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lookupListIndex = dom.createElement('LookupListIndex');
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lookupListIndex.setAttribute('index', count);
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lookupListIndex.setAttribute('value', '20');
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feature.appendChild(lookupListIndex);
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}
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// helper function for adding feature to ScriptRecord
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const addFeature = (scriptRecord, featureRecord, lang) => {
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if (!lang) return;
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const index = featureRecord.getAttribute('index');
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if (xpath.select(`FeatureIndex[@value="${index}"]`, lang, true)) return;
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const count = xpath.select('count(FeatureIndex)', lang, true);
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const featureIndex = dom.createElement('FeatureIndex');
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featureIndex.setAttribute('index', count);
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featureIndex.setAttribute('value', index);
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lang.appendChild(featureIndex);
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};
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// nead to add feature to ScriptList
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const scriptList = xpath.select('/ttFont/GSUB/ScriptList', dom, true);
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const scriptRecords = xpath.select('ScriptRecord', scriptList);
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scriptRecords.forEach(node => {
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// check for feature in DefaultLangSys
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addFeature(
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node,
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featureRecord,
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xpath.select('Script/DefaultLangSys', node, true)
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);
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// add features to any other languages
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xpath
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.select('Script/LangSysRecord/LangSys', node)
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.forEach(lang => addFeature(node, featureRecord, lang));
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});
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// finally add LigatureSubst to Lookup index=20
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const lookupList = xpath.select('/ttFont/GSUB/LookupList', dom, true);
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const newLookup = xpath.select('/LookupList/Lookup', configDom, true);
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let lookup = xpath.select(
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'/ttFont/GSUB/LookupList/Lookup[@index="20"]',
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dom,
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true
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);
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if (!lookup) {
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lookupList.appendChild(newLookup);
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} else {
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lookupList.replaceChild(newLookup, lookup);
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}
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}
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async function patchCharStrings(dom) {
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const configDom = await loadConfigAsync('charstrings');
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const nameDom = await loadConfigAsync('names');
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const cffFont = xpath.select('/ttFont/CFF/CFFFont', dom, true);
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cffFont.setAttribute('name', ligFontName);
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// get names from name config
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const fullName = nameDom.documentElement.getAttribute('fullName');
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const familyName = nameDom.documentElement.getAttribute('familyName');
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setAttribute(cffFont, 'FullName', 'value', fullName);
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setAttribute(cffFont, 'FamilyName', 'value', familyName);
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const targetCharStrings = xpath.select('CharStrings', cffFont, true);
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const charStrings = xpath.select('/CharStrings/CharString', configDom);
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charStrings.forEach(node => targetCharStrings.appendChild(node));
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}
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const setAttribute = (parent, path, name, value) => {
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var node = xpath.select(path, parent, true);
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node.setAttribute(name, value);
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};
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const copyConfigAttribute = (dom, configDom, path, name) => {
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const value = xpath.select(path, configDom, true).getAttribute(name);
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setAttribute(dom, path, name, value);
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};
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const serialize = dom =>
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new XMLSerializer().serializeToString(dom, false, node => {
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if (node.nodeType === NodeType.TEXT_NODE) {
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if (regExWhitespace.test(node.data)) return null;
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const data = node.data
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.split('\r\n')
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.filter(s => /\S+/.test(s))
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.map(s => s.replace(/^\s+/g, ''))
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.join('\n');
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return node.ownerDocument.createTextNode(data);
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}
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return node;
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});
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main();
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