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'use strict';
const { unit } = require('postcss-value-parser');
const { getArguments } = require('cssnano-utils');
const addSpace = require('../lib/addSpace');
const getValue = require('../lib/getValue');
const mathFunctions = require('../lib/mathfunctions.js');
const vendorUnprefixed = require('../lib/vendorUnprefixed.js');
// box-shadow: inset? && <length>{2,4} && <color>?
/**
* @param {import('postcss-value-parser').ParsedValue} parsed
* @return {string}
*/
module.exports = function normalizeBoxShadow(parsed) {
let args = getArguments(parsed);
const normalized = normalize(args);
if (normalized === false) {
return parsed.toString();
}
return getValue(normalized);
};
/**
* @param {import('postcss-value-parser').Node[][]} args
* @return {false | import('postcss-value-parser').Node[][]}
*/
function normalize(args) {
const list = [];
let abort = false;
for (const arg of args) {
/** @type {import('postcss-value-parser').Node[]} */
let val = [];
/** @type {Record<'inset'|'color', import('postcss-value-parser').Node[]>} */
let state = {
inset: [],
color: [],
};
arg.forEach((node) => {
const { type, value } = node;
if (
type === 'function' &&
mathFunctions.has(vendorUnprefixed(value.toLowerCase()))
) {
abort = true;
return;
}
if (type === 'space') {
return;
}
if (unit(value)) {
val = [...val, node, addSpace()];
} else if (value.toLowerCase() === 'inset') {
state.inset = [...state.inset, node, addSpace()];
} else {
state.color = [...state.color, node, addSpace()];
}
});
if (abort) {
return false;
}
list.push([...state.inset, ...val, ...state.color]);
}
return list;
}