source: trip-planner-front/node_modules/postcss-minify-selectors/dist/index.js@ 6a80231

Last change on this file since 6a80231 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 5.3 KB
Line 
1"use strict";
2
3Object.defineProperty(exports, "__esModule", {
4 value: true
5});
6exports.default = void 0;
7
8var _alphanumSort = _interopRequireDefault(require("alphanum-sort"));
9
10var _postcssSelectorParser = _interopRequireDefault(require("postcss-selector-parser"));
11
12var _canUnquote = _interopRequireDefault(require("./lib/canUnquote.js"));
13
14function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
15
16const pseudoElements = ['::before', '::after', '::first-letter', '::first-line'];
17
18function attribute(selector) {
19 if (selector.value) {
20 if (selector.raws.value) {
21 // Join selectors that are split over new lines
22 selector.raws.value = selector.raws.value.replace(/\\\n/g, '').trim();
23 }
24
25 if ((0, _canUnquote.default)(selector.value)) {
26 selector.quoteMark = null;
27 }
28
29 if (selector.operator) {
30 selector.operator = selector.operator.trim();
31 }
32 }
33
34 selector.rawSpaceBefore = '';
35 selector.rawSpaceAfter = '';
36 selector.spaces.attribute = {
37 before: '',
38 after: ''
39 };
40 selector.spaces.operator = {
41 before: '',
42 after: ''
43 };
44 selector.spaces.value = {
45 before: '',
46 after: selector.insensitive ? ' ' : ''
47 };
48 selector.raws.spaces.attribute = {
49 before: '',
50 after: ''
51 };
52 selector.raws.spaces.operator = {
53 before: '',
54 after: ''
55 };
56 selector.raws.spaces.value = {
57 before: '',
58 after: selector.insensitive ? ' ' : ''
59 };
60
61 if (selector.insensitive) {
62 selector.raws.spaces.insensitive = {
63 before: '',
64 after: ''
65 };
66 }
67
68 selector.attribute = selector.attribute.trim();
69}
70
71function combinator(selector) {
72 const value = selector.value.trim();
73 selector.spaces.before = '';
74 selector.spaces.after = '';
75 selector.rawSpaceBefore = '';
76 selector.rawsSpaceAfter = '';
77 selector.value = value.length ? value : ' ';
78}
79
80const pseudoReplacements = {
81 ':nth-child': ':first-child',
82 ':nth-of-type': ':first-of-type',
83 ':nth-last-child': ':last-child',
84 ':nth-last-of-type': ':last-of-type'
85};
86
87function pseudo(selector) {
88 const value = selector.value.toLowerCase();
89
90 if (selector.nodes.length === 1 && pseudoReplacements[value]) {
91 const first = selector.at(0);
92 const one = first.at(0);
93
94 if (first.length === 1) {
95 if (one.value === '1') {
96 selector.replaceWith(_postcssSelectorParser.default.pseudo({
97 value: pseudoReplacements[value]
98 }));
99 }
100
101 if (one.value.toLowerCase() === 'even') {
102 one.value = '2n';
103 }
104 }
105
106 if (first.length === 3) {
107 const two = first.at(1);
108 const three = first.at(2);
109
110 if (one.value.toLowerCase() === '2n' && two.value === '+' && three.value === '1') {
111 one.value = 'odd';
112 two.remove();
113 three.remove();
114 }
115 }
116
117 return;
118 }
119
120 const uniques = [];
121 selector.walk(child => {
122 if (child.type === 'selector') {
123 const childStr = String(child);
124
125 if (!~uniques.indexOf(childStr)) {
126 uniques.push(childStr);
127 } else {
128 child.remove();
129 }
130 }
131 });
132
133 if (~pseudoElements.indexOf(value)) {
134 selector.value = selector.value.slice(1);
135 }
136}
137
138const tagReplacements = {
139 from: '0%',
140 '100%': 'to'
141};
142
143function tag(selector) {
144 const value = selector.value.toLowerCase();
145
146 if (Object.prototype.hasOwnProperty.call(tagReplacements, value)) {
147 selector.value = tagReplacements[value];
148 }
149}
150
151function universal(selector) {
152 const next = selector.next();
153
154 if (next && next.type !== 'combinator') {
155 selector.remove();
156 }
157}
158
159const reducers = {
160 attribute,
161 combinator,
162 pseudo,
163 tag,
164 universal
165};
166
167function pluginCreator() {
168 return {
169 postcssPlugin: 'postcss-minify-selectors',
170
171 OnceExit(css) {
172 const cache = {};
173 const processor = (0, _postcssSelectorParser.default)(selectors => {
174 selectors.nodes = (0, _alphanumSort.default)(selectors.nodes, {
175 insensitive: true
176 });
177 const uniqueSelectors = [];
178 selectors.walk(sel => {
179 const {
180 type
181 } = sel; // Trim whitespace around the value
182
183 sel.spaces.before = sel.spaces.after = '';
184
185 if (Object.prototype.hasOwnProperty.call(reducers, type)) {
186 reducers[type](sel);
187 return;
188 }
189
190 const toString = String(sel);
191
192 if (type === 'selector' && sel.parent.type !== 'pseudo') {
193 if (!~uniqueSelectors.indexOf(toString)) {
194 uniqueSelectors.push(toString);
195 } else {
196 sel.remove();
197 }
198 }
199 });
200 });
201 css.walkRules(rule => {
202 const selector = rule.raws.selector && rule.raws.selector.value === rule.selector ? rule.raws.selector.raw : rule.selector; // If the selector ends with a ':' it is likely a part of a custom mixin,
203 // so just pass through.
204
205 if (selector[selector.length - 1] === ':') {
206 return;
207 }
208
209 if (cache[selector]) {
210 rule.selector = cache[selector];
211 return;
212 }
213
214 const optimizedSelector = processor.processSync(selector);
215 rule.selector = optimizedSelector;
216 cache[selector] = optimizedSelector;
217 });
218 }
219
220 };
221}
222
223pluginCreator.postcss = true;
224var _default = pluginCreator;
225exports.default = _default;
226module.exports = exports.default;
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