source: trip-planner-front/node_modules/postcss-initial/lib/rules-fabric.js@ bdd6491

Last change on this file since bdd6491 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 2.6 KB
Line 
1var decls = require('./decls.json');
2
3function template(string, data) {
4 return string.replace(/\$\{([\w\-\.]*)\}/g, function (_str, key) {
5 var v = data[key];
6 return typeof v !== 'undefined' && v !== null ? v : '';
7 });
8}
9
10/*
11 Rules legend:
12 - combined - if rule is combined it will be rendered with template
13 - combined and basic rules are present in basic reset
14 - combined, basic and inherited rules are present in full reset
15*/
16
17function _getRulesMap(inputDecls) {
18 return inputDecls
19 .filter(function (decl) {
20 return !decl.combined;
21 })
22 .reduce(function (map, decl) {
23 map[decl.prop.replace(/\-/g, '')] = decl.initial;
24 return map;
25 }, {});
26}
27
28function _compileDecls(inputDecls) {
29 var templateVars = _getRulesMap(inputDecls);
30 return inputDecls.map(function (decl) {
31 if (decl.combined && decl.initial) {
32 decl.initial = template(decl.initial.replace(/\-/g, ''), templateVars);
33 }
34 return decl;
35 });
36}
37
38function _getRequirements(inputDecls) {
39 return inputDecls.reduce(function (map, decl) {
40 if (!decl.contains) return map;
41 return decl.contains.reduce(function (mapInner, dependency) {
42 mapInner[dependency] = decl;
43 return mapInner;
44 }, map);
45 }, {});
46}
47
48function _expandContainments(inputDecls) {
49 var requiredMap = _getRequirements(inputDecls);
50 return inputDecls
51 .filter(function (decl) {
52 return !decl.contains;
53 }).map(function (decl) {
54 var dependency = requiredMap[decl.prop];
55 if (dependency) {
56 decl.requiredBy = dependency.prop;
57 decl.basic = decl.basic || dependency.basic;
58 decl.inherited = decl.inherited || dependency.inherited;
59 }
60 return decl;
61 });
62}
63
64var compiledDecls = _expandContainments(_compileDecls(decls));
65
66function _clearDecls(rules, value) {
67 return rules.map(function (rule) {
68 return {
69 prop: rule.prop,
70 value: value.replace(/\binitial\b/g, rule.initial)
71 };
72 });
73}
74
75function _allDecls(onlyInherited) {
76 return compiledDecls.filter(function (decl) {
77 var allowed = decl.combined || decl.basic;
78 if (onlyInherited) return allowed && decl.inherited;
79 return allowed;
80 });
81}
82
83function _concreteDecl(declName) {
84 return compiledDecls.filter(function (decl) {
85 return declName === decl.prop || declName === decl.requiredBy;
86 });
87}
88
89function makeFallbackFunction(onlyInherited) {
90 return function (declName, declValue) {
91 var result;
92 if (declName === 'all') {
93 result = _allDecls(onlyInherited);
94 } else {
95 result = _concreteDecl(declName);
96 }
97 return _clearDecls(result, declValue);
98 };
99}
100
101module.exports = makeFallbackFunction;
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