epiphany/node_modules/postcss-font-variant/index.js
2023-12-09 22:48:07 -08:00

126 lines
3.1 KiB
JavaScript
Executable file

/**
* font variant convertion map
*
* @type {Object}
*/
const 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": "\"smcp\"",
"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 (const prop in fontVariantProperties) {
const keys = fontVariantProperties[prop]
for (const 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) {
let fontFeatureSettings = null;
decl.parent.walkDecls((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
}
function walkRule(rule) {
let fontFeatureSettings = null
// read custom media queries
rule.walkDecls((decl) => {
if (!fontVariantProperties[decl.prop]) {
return null
}
let newValue = decl.value
if (decl.prop === "font-variant") {
newValue = decl.value.split(/\s+/g).map((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;
}
})
}
/**
* Expose the font-variant plugin.
*/
module.exports = () => {
return {
postcssPlugin: "postcss-font-variant",
Once(root) {
root.walkRules(walkRule)
}
}
}
module.exports.postcss = true