source: trip-planner-front/node_modules/css-tree/lib/utils/names.js@ 6fe77af

Last change on this file since 6fe77af was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 2.9 KB
Line 
1var hasOwnProperty = Object.prototype.hasOwnProperty;
2var keywords = Object.create(null);
3var properties = Object.create(null);
4var HYPHENMINUS = 45; // '-'.charCodeAt()
5
6function isCustomProperty(str, offset) {
7 offset = offset || 0;
8
9 return str.length - offset >= 2 &&
10 str.charCodeAt(offset) === HYPHENMINUS &&
11 str.charCodeAt(offset + 1) === HYPHENMINUS;
12}
13
14function getVendorPrefix(str, offset) {
15 offset = offset || 0;
16
17 // verdor prefix should be at least 3 chars length
18 if (str.length - offset >= 3) {
19 // vendor prefix starts with hyper minus following non-hyper minus
20 if (str.charCodeAt(offset) === HYPHENMINUS &&
21 str.charCodeAt(offset + 1) !== HYPHENMINUS) {
22 // vendor prefix should contain a hyper minus at the ending
23 var secondDashIndex = str.indexOf('-', offset + 2);
24
25 if (secondDashIndex !== -1) {
26 return str.substring(offset, secondDashIndex + 1);
27 }
28 }
29 }
30
31 return '';
32}
33
34function getKeywordDescriptor(keyword) {
35 if (hasOwnProperty.call(keywords, keyword)) {
36 return keywords[keyword];
37 }
38
39 var name = keyword.toLowerCase();
40
41 if (hasOwnProperty.call(keywords, name)) {
42 return keywords[keyword] = keywords[name];
43 }
44
45 var custom = isCustomProperty(name, 0);
46 var vendor = !custom ? getVendorPrefix(name, 0) : '';
47
48 return keywords[keyword] = Object.freeze({
49 basename: name.substr(vendor.length),
50 name: name,
51 vendor: vendor,
52 prefix: vendor,
53 custom: custom
54 });
55}
56
57function getPropertyDescriptor(property) {
58 if (hasOwnProperty.call(properties, property)) {
59 return properties[property];
60 }
61
62 var name = property;
63 var hack = property[0];
64
65 if (hack === '/') {
66 hack = property[1] === '/' ? '//' : '/';
67 } else if (hack !== '_' &&
68 hack !== '*' &&
69 hack !== '$' &&
70 hack !== '#' &&
71 hack !== '+' &&
72 hack !== '&') {
73 hack = '';
74 }
75
76 var custom = isCustomProperty(name, hack.length);
77
78 // re-use result when possible (the same as for lower case)
79 if (!custom) {
80 name = name.toLowerCase();
81 if (hasOwnProperty.call(properties, name)) {
82 return properties[property] = properties[name];
83 }
84 }
85
86 var vendor = !custom ? getVendorPrefix(name, hack.length) : '';
87 var prefix = name.substr(0, hack.length + vendor.length);
88
89 return properties[property] = Object.freeze({
90 basename: name.substr(prefix.length),
91 name: name.substr(hack.length),
92 hack: hack,
93 vendor: vendor,
94 prefix: prefix,
95 custom: custom
96 });
97}
98
99module.exports = {
100 keyword: getKeywordDescriptor,
101 property: getPropertyDescriptor,
102 isCustomProperty: isCustomProperty,
103 vendorPrefix: getVendorPrefix
104};
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