d2cba96e10
* reduce linting delay * parse mozformat in worker * allow empty functions in 'filter:' property https://drafts.fxtf.org/filter-effects/#supported-filter-functions * support comma-separated list in :lang() * strip vendor prefix in isLiteral()
110 lines
3.3 KiB
JavaScript
110 lines
3.3 KiB
JavaScript
/* global parserlib */
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'use strict';
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function parseMozFormat(mozStyle) {
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const CssToProperty = {
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'url': 'urls',
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'url-prefix': 'urlPrefixes',
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'domain': 'domains',
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'regexp': 'regexps',
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};
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const parser = new parserlib.css.Parser();
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const sectionStack = [{code: '', start: 0}];
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const errors = [];
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const sections = [];
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parser.addListener('startdocument', e => {
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const lastSection = sectionStack[sectionStack.length - 1];
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let outerText = mozStyle.slice(lastSection.start, e.offset);
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const lastCmt = getLastComment(outerText);
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const section = {
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code: '',
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start: parser._tokenStream._token.offset + 1,
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};
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// move last comment before @-moz-document inside the section
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if (!lastCmt.includes('AGENT_SHEET') &&
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!lastCmt.includes('==') &&
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!/==userstyle==/iu.test(lastCmt)) {
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if (lastCmt) {
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section.code = lastCmt + '\n';
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outerText = outerText.slice(0, -lastCmt.length);
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}
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outerText = outerText.match(/^\s*/)[0] + outerText.trim();
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}
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if (outerText.trim()) {
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lastSection.code = outerText;
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doAddSection(lastSection);
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lastSection.code = '';
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}
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for (const {name, expr, uri} of e.functions) {
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const aType = CssToProperty[name.toLowerCase()];
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(section[aType] = section[aType] || []).push(uri || expr && expr.parts[0].value || '');
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}
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sectionStack.push(section);
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});
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parser.addListener('enddocument', e => {
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const section = sectionStack.pop();
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const lastSection = sectionStack[sectionStack.length - 1];
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section.code += mozStyle.slice(section.start, e.offset);
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lastSection.start = e.offset + 1;
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doAddSection(section);
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});
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parser.addListener('endstylesheet', () => {
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// add nonclosed outer sections (either broken or the last global one)
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const lastSection = sectionStack[sectionStack.length - 1];
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lastSection.code += mozStyle.slice(lastSection.start);
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sectionStack.forEach(doAddSection);
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});
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parser.addListener('error', e => {
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errors.push(`${e.line}:${e.col} ${e.message.replace(/ at line \d.+$/, '')}`);
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});
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parser.parse(mozStyle);
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return {sections, errors};
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function doAddSection(section) {
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section.code = section.code.trim();
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// don't add empty sections
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if (
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!section.code &&
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!section.urls &&
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!section.urlPrefixes &&
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!section.domains &&
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!section.regexps
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) {
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return;
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}
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/* ignore boilerplate NS */
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if (section.code === '@namespace url(http://www.w3.org/1999/xhtml);') {
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return;
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}
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sections.push(Object.assign({}, section));
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}
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function getLastComment(text) {
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let open = text.length;
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let close;
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while (open) {
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// at this point we're guaranteed to be outside of a comment
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close = text.lastIndexOf('*/', open - 2);
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if (close < 0) {
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break;
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}
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// stop if a non-whitespace precedes and return what we currently have
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const tailEmpty = !text.substring(close + 2, open).trim();
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if (!tailEmpty) {
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break;
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}
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// find a closed preceding comment
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const prevClose = text.lastIndexOf('*/', close - 2);
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// then find the real start of current comment
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// e.g. /* preceding */ /* current /* current /* current */
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open = text.indexOf('/*', prevClose < 0 ? 0 : prevClose + 2);
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}
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return open ? text.slice(open) : text;
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}
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}
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