source: trip-planner-front/node_modules/postcss-font-variant/index.js@ 6a3a178

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

initial commit

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1var postcss = require("postcss");
2
3/**
4 * font variant convertion map
5 *
6 * @type {Object}
7 */
8var fontVariantProperties = {
9 "font-variant-ligatures": {
10 "common-ligatures": "\"liga\", \"clig\"",
11 "no-common-ligatures": "\"liga\", \"clig off\"",
12 "discretionary-ligatures": "\"dlig\"",
13 "no-discretionary-ligatures": "\"dlig\" off",
14 "historical-ligatures": "\"hlig\"",
15 "no-historical-ligatures": "\"hlig\" off",
16 contextual: "\"calt\"",
17 "no-contextual": "\"calt\" off"
18 },
19
20 "font-variant-position": {
21 sub: "\"subs\"",
22 "super": "\"sups\"",
23 normal: "\"subs\" off, \"sups\" off"
24 },
25
26 "font-variant-caps": {
27 "small-caps": "\"smcp\"",
28 "all-small-caps": "\"smcp\", \"c2sc\"",
29 "petite-caps": "\"pcap\"",
30 "all-petite-caps": "\"pcap\", \"c2pc\"",
31 unicase: "\"unic\"",
32 "titling-caps": "\"titl\""
33 },
34
35 "font-variant-numeric": {
36 "lining-nums": "\"lnum\"",
37 "oldstyle-nums": "\"onum\"",
38 "proportional-nums": "\"pnum\"",
39 "tabular-nums": "\"tnum\"",
40 "diagonal-fractions": "\"frac\"",
41 "stacked-fractions": "\"afrc\"",
42 ordinal: "\"ordn\"",
43 "slashed-zero": "\"zero\""
44 },
45
46 "font-kerning": {
47 normal: "\"kern\"",
48 none: "\"kern\" off"
49 },
50
51 "font-variant": {
52 normal: "normal",
53 inherit: "inherit"
54 }
55}
56
57// The `font-variant` property is a shorthand for all the others.
58for (var prop in fontVariantProperties) {
59 var keys = fontVariantProperties[prop]
60 for (var key in keys) {
61 if (!(key in fontVariantProperties["font-variant"])) {
62 fontVariantProperties["font-variant"][key] = keys[key]
63 }
64 }
65}
66
67// Find font-feature-settings declaration before given declaration,
68// create if does not exist
69function getFontFeatureSettingsPrevTo(decl) {
70 var fontFeatureSettings = null;
71 decl.parent.walkDecls(function(decl) {
72 if (decl.prop === "font-feature-settings") {
73 fontFeatureSettings = decl;
74 }
75 })
76
77 if (fontFeatureSettings === null) {
78 fontFeatureSettings = decl.clone()
79 fontFeatureSettings.prop = "font-feature-settings"
80 fontFeatureSettings.value = ""
81 decl.parent.insertBefore(decl, fontFeatureSettings)
82 }
83 return fontFeatureSettings
84}
85
86/**
87 * Expose the font-variant plugin.
88 */
89module.exports = postcss.plugin("postcss-font-variant", function() {
90 return function(styles) {
91 styles.walkRules(function(rule) {
92 var fontFeatureSettings = null
93 // read custom media queries
94 rule.walkDecls(function(decl) {
95 if (!fontVariantProperties[decl.prop]) {
96 return null
97 }
98
99 var newValue = decl.value
100 if (decl.prop === "font-variant") {
101 newValue = decl.value.split(/\s+/g).map(function(val) {
102 return fontVariantProperties["font-variant"][val]
103 }).join(", ")
104 }
105 else if (fontVariantProperties[decl.prop][decl.value]) {
106 newValue = fontVariantProperties[decl.prop][decl.value]
107 }
108
109 if (fontFeatureSettings === null) {
110 fontFeatureSettings = getFontFeatureSettingsPrevTo(decl);
111 }
112 if (fontFeatureSettings.value && fontFeatureSettings.value !== newValue) {
113 fontFeatureSettings.value += ", " + newValue;
114 }
115 else {
116 fontFeatureSettings.value = newValue;
117 }
118 })
119 })
120 }
121})
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