mirror of
https://github.com/wu736139669/Monkey-Test.git
synced 2026-08-05 05:55:46 +00:00
103 lines
2.9 KiB
JavaScript
103 lines
2.9 KiB
JavaScript
'use strict';
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var postcss = require('postcss');
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var list = postcss.list;
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var shorter = require('./lib/shorter');
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var intersection = require('./lib/intersection');
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var uniqs = require('uniqs');
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var identifiers = require('./lib/identifiers');
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var assign = require('object-assign');
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var keywords = [
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'sans-serif',
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'serif',
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'fantasy',
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'cursive',
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'monospace'
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];
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/**
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* No point in keeping the rest of the declaration after a keyword
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*/
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function removeAfterKeyword () {
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var hasKeyword = false;
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return function (family) {
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if (~keywords.indexOf(family)) {
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hasKeyword = true;
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return true;
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}
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return !hasKeyword;
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};
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}
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function unquote (value) {
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return value.replace(/^("|')(.*)\1$/, '$2').trim();
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}
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function optimiseFontFamily (opts, decl) {
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var values = list.comma(decl.value).map(function (value) {
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// Don't escape identifiers starting with digits
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if (/^[0-9]/.test(value) || !opts.removeQuotes) {
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return value;
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}
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var shorthand = [];
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var unquoted = '';
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list.space(value).forEach(function (id) {
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if (~identifiers.indexOf(id)) {
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shorthand.push(id);
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} else if (/(\d*?\.?\d)(%|rem|em|ex|in|cm|mm|pt|pc|px)(\/[\d\.]*)?$/.test(id)) {
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shorthand.push(id);
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} else {
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unquoted += unquote(id) + ' ';
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}
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});
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// There's only one identifier...
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if (!unquoted) {
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shorthand = [];
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unquoted = unquote(value);
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}
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var escaped = list.space(unquoted);
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// Ensure that any unquoted identifiers are not font keywords
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if (intersection(keywords, escaped)) {
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return value;
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}
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escaped = escaped.map(function (ident, i) {
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if (/^[^a-z]/i.test(escaped[i + 1])) {
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return ident + '\\';
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}
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if (!/^[^a-z\d\xa0-\uffff_-]/i.test(ident)) {
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return ident.replace(/([^a-z\d\xa0-\uffff_-])/gi, '\\$1');
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}
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if (/^[^a-z]/i.test(ident) && i < 1) {
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return '\\' + ident;
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}
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return ident;
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}).join(' ');
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if (shorthand.length) {
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var s = shorthand.join(' ') + ' ';
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return shorter(s + escaped, s + '"' + unquoted.trim() + '"');
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}
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return shorter(escaped, value);
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});
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if (opts.removeAfterKeyword) {
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values = values.filter(removeAfterKeyword());
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}
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if (opts.removeDuplicates) {
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values = uniqs(values);
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}
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decl.value = values.join(',');
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}
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module.exports = postcss.plugin('postcss-font-family', function (opts) {
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opts = assign({
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removeAfterKeyword: true,
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removeDuplicates: true,
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removeQuotes: true
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}, opts);
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return function (css) {
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css.eachDecl(/^font/, optimiseFontFamily.bind(this, opts));
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};
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});
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