122 lines
3.2 KiB
JavaScript
Executable File
122 lines
3.2 KiB
JavaScript
Executable File
var postcss = require("postcss");
|
|
|
|
/**
|
|
* font variant convertion map
|
|
*
|
|
* @type {Object}
|
|
*/
|
|
var fontVariantProperties = {
|
|
"font-variant-ligatures": {
|
|
"common-ligatures": "\"liga\", \"clig\"",
|
|
"no-common-ligatures": "\"liga\", \"clig off\"",
|
|
"discretionary-ligatures": "\"dlig\"",
|
|
"no-discretionary-ligatures": "\"dlig\" off",
|
|
"historical-ligatures": "\"hlig\"",
|
|
"no-historical-ligatures": "\"hlig\" off",
|
|
contextual: "\"calt\"",
|
|
"no-contextual": "\"calt\" off"
|
|
},
|
|
|
|
"font-variant-position": {
|
|
sub: "\"subs\"",
|
|
"super": "\"sups\"",
|
|
normal: "\"subs\" off, \"sups\" off"
|
|
},
|
|
|
|
"font-variant-caps": {
|
|
"small-caps": "\"c2sc\"",
|
|
"all-small-caps": "\"smcp\", \"c2sc\"",
|
|
"petite-caps": "\"pcap\"",
|
|
"all-petite-caps": "\"pcap\", \"c2pc\"",
|
|
unicase: "\"unic\"",
|
|
"titling-caps": "\"titl\""
|
|
},
|
|
|
|
"font-variant-numeric": {
|
|
"lining-nums": "\"lnum\"",
|
|
"oldstyle-nums": "\"onum\"",
|
|
"proportional-nums": "\"pnum\"",
|
|
"tabular-nums": "\"tnum\"",
|
|
"diagonal-fractions": "\"frac\"",
|
|
"stacked-fractions": "\"afrc\"",
|
|
ordinal: "\"ordn\"",
|
|
"slashed-zero": "\"zero\""
|
|
},
|
|
|
|
"font-kerning": {
|
|
normal: "\"kern\"",
|
|
none: "\"kern\" off"
|
|
},
|
|
|
|
"font-variant": {
|
|
normal: "normal",
|
|
inherit: "inherit"
|
|
}
|
|
}
|
|
|
|
// The `font-variant` property is a shorthand for all the others.
|
|
for (var prop in fontVariantProperties) {
|
|
var keys = fontVariantProperties[prop]
|
|
for (var key in keys) {
|
|
if (!(key in fontVariantProperties["font-variant"])) {
|
|
fontVariantProperties["font-variant"][key] = keys[key]
|
|
}
|
|
}
|
|
}
|
|
|
|
// Find font-feature-settings declaration before given declaration,
|
|
// create if does not exist
|
|
function getFontFeatureSettingsPrevTo(decl) {
|
|
var fontFeatureSettings = null;
|
|
decl.parent.walkDecls(function(decl) {
|
|
if (decl.prop === "font-feature-settings") {
|
|
fontFeatureSettings = decl;
|
|
}
|
|
})
|
|
|
|
if (fontFeatureSettings === null) {
|
|
fontFeatureSettings = decl.clone()
|
|
fontFeatureSettings.prop = "font-feature-settings"
|
|
fontFeatureSettings.value = ""
|
|
decl.parent.insertBefore(decl, fontFeatureSettings)
|
|
}
|
|
return fontFeatureSettings
|
|
}
|
|
|
|
/**
|
|
* Expose the font-variant plugin.
|
|
*/
|
|
module.exports = postcss.plugin("postcss-font-variant", function() {
|
|
return function(styles) {
|
|
styles.walkRules(function(rule) {
|
|
var fontFeatureSettings = null
|
|
// read custom media queries
|
|
rule.walkDecls(function(decl) {
|
|
if (!fontVariantProperties[decl.prop]) {
|
|
return null
|
|
}
|
|
|
|
var newValue = decl.value
|
|
if (decl.prop === "font-variant") {
|
|
newValue = decl.value.split(/\s+/g).map(function(val) {
|
|
return fontVariantProperties["font-variant"][val]
|
|
}).join(", ")
|
|
}
|
|
else if (fontVariantProperties[decl.prop][decl.value]) {
|
|
newValue = fontVariantProperties[decl.prop][decl.value]
|
|
}
|
|
|
|
if (fontFeatureSettings === null) {
|
|
fontFeatureSettings = getFontFeatureSettingsPrevTo(decl);
|
|
}
|
|
if (fontFeatureSettings.value && fontFeatureSettings.value !== newValue) {
|
|
fontFeatureSettings.value += ", " + newValue;
|
|
}
|
|
else {
|
|
fontFeatureSettings.value = newValue;
|
|
}
|
|
})
|
|
})
|
|
}
|
|
})
|