source: trip-planner-front/node_modules/postcss-attribute-case-insensitive/src/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: 2.3 KB
Line 
1import postcss from 'postcss';
2import parser from 'postcss-selector-parser';
3
4function nodeIsInsensitiveAttribute(node) {
5 return node.type === 'attribute' && node.insensitive;
6}
7
8function selectorHasInsensitiveAttribute(selector) {
9 return selector.some(nodeIsInsensitiveAttribute);
10}
11
12function transformString(strings, charPos, string) {
13 const char = string.charAt(charPos);
14 if (char === '') {
15 return strings;
16 }
17
18 let newStrings = strings.map(x => x + char);
19 const upperChar = char.toLocaleUpperCase();
20
21 if (upperChar !== char) {
22 newStrings = newStrings.concat(strings.map(x => x + upperChar));
23 }
24
25 return transformString(newStrings, charPos + 1, string);
26}
27
28function createSensitiveAtributes(attribute) {
29 const attributes = transformString([''], 0, attribute.value);
30 return attributes.map(x => {
31 const newAttribute = attribute.clone({
32 spaces: {
33 after: attribute.spaces.after,
34 before: attribute.spaces.before
35 },
36 insensitive: false
37 });
38
39 newAttribute.setValue(x);
40
41 return newAttribute;
42 });
43}
44
45function createNewSelectors(selector) {
46 let newSelectors = [parser.selector()];
47
48 selector.walk(node => {
49 if (!nodeIsInsensitiveAttribute(node)) {
50 newSelectors.forEach(newSelector => {
51 newSelector.append(node.clone());
52 });
53 return;
54 }
55
56 const sensitiveAttributes = createSensitiveAtributes(node);
57 const newSelectorsWithSensitiveAttributes = [];
58
59 sensitiveAttributes.forEach(newNode => {
60 newSelectors.forEach(newSelector => {
61 const newSelectorWithNewNode = newSelector.clone();
62 newSelectorWithNewNode.append(newNode);
63 newSelectorsWithSensitiveAttributes.push(newSelectorWithNewNode);
64 });
65 });
66
67 newSelectors = newSelectorsWithSensitiveAttributes;
68 });
69
70 return newSelectors;
71}
72
73function transform(selectors) {
74 let newSelectors = [];
75
76 selectors.each(selector => {
77 if (selectorHasInsensitiveAttribute(selector)) {
78 newSelectors = newSelectors.concat(createNewSelectors(selector));
79 selector.remove();
80 }
81 });
82
83 if (newSelectors.length) {
84 newSelectors.forEach(newSelector => selectors.append(newSelector));
85 }
86}
87
88const caseInsensitiveRegExp = /i(\s*\/\*[\W\w]*?\*\/)*\s*\]/;
89
90export default postcss.plugin('postcss-attribute-case-insensitive', () => css => {
91 css.walkRules(caseInsensitiveRegExp, rule => {
92 rule.selector = parser(transform).processSync(rule.selector);
93 });
94});
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