129 lines
5.0 KiB
JavaScript
129 lines
5.0 KiB
JavaScript
import { lab2rgb, lch2rgb } from '@csstools/convert-colors';
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import postcss from 'postcss';
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import parser from 'postcss-values-parser';
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var index = postcss.plugin('postcss-lab-function', opts => {
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const preserve = 'preserve' in Object(opts) ? Boolean(opts.preserve) : false;
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return root => {
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root.walkDecls(decl => {
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const value = decl.value;
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if (colorAnyRegExp.test(value)) {
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const ast = parser(value).parse();
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ast.walkType('func', node => {
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if (colorRegExp.test(node.value)) {
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const children = node.nodes.slice(1, -1);
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const isLab = labRegExp.test(node.value);
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const isGray = grayRegExp.test(node.value);
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const isFunctionalLAB = !isGray && matchFunctionalLAB(children);
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const isFunctionalLCH = !isGray && matchFunctionalLCH(children);
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const isFunctionalGray = isGray && matchFunctionalGray(children);
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if (isFunctionalLAB || isFunctionalLCH) {
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node.value = 'rgb';
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const slashNode = children[3];
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const alphaNode = children[4];
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if (alphaNode) {
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if (isPercentage(alphaNode) && !isCalc(alphaNode)) {
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alphaNode.unit = '';
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alphaNode.value = String(alphaNode.value / 100);
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}
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if (alphaNode.value === '1') {
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slashNode.remove();
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alphaNode.remove();
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} else {
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node.value += 'a';
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}
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}
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if (slashNode && isSlash(slashNode)) {
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slashNode.replaceWith(newComma());
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}
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const converter = isLab ? lab2rgb : lch2rgb;
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const rgbValues = converter(...[children[0].value, children[1].value, children[2].value].map(number => parseFloat(number))).map(sourceValue => Math.max(Math.min(parseInt(sourceValue * 2.55), 255), 0));
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children[0].value = String(rgbValues[0]);
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children[1].value = String(rgbValues[1]);
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children[2].value = String(rgbValues[2]);
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node.nodes.splice(3, 0, [newComma()]);
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node.nodes.splice(2, 0, [newComma()]);
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} else if (isFunctionalGray) {
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node.value = 'rgb';
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const alphaNode = children[2];
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const rgbValues = lab2rgb(...[children[0].value, 0, 0].map(number => parseFloat(number))).map(sourceValue => Math.max(Math.min(parseInt(sourceValue * 2.55), 255), 0));
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node.removeAll().append(newParen('(')).append(newNumber(rgbValues[0])).append(newComma()).append(newNumber(rgbValues[1])).append(newComma()).append(newNumber(rgbValues[2])).append(newParen(')'));
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if (alphaNode) {
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if (isPercentage(alphaNode) && !isCalc(alphaNode)) {
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alphaNode.unit = '';
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alphaNode.value = String(alphaNode.value / 100);
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}
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if (alphaNode.value !== '1') {
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node.value += 'a';
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node.insertBefore(node.last, newComma()).insertBefore(node.last, alphaNode);
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}
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}
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}
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}
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});
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const newValue = String(ast);
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if (preserve) {
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decl.cloneBefore({
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value: newValue
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});
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} else {
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decl.value = newValue;
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}
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}
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});
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};
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});
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const colorAnyRegExp = /(^|[^\w-])(lab|lch|gray)\(/i;
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const colorRegExp = /^(lab|lch|gray)$/i;
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const labRegExp = /^lab$/i;
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const grayRegExp = /^gray$/i;
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const alphaUnitMatch = /^%?$/i;
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const calcFuncMatch = /^calc$/i;
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const hueUnitMatch = /^(deg|grad|rad|turn)?$/i;
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const isAlphaValue = node => isCalc(node) || node.type === 'number' && alphaUnitMatch.test(node.unit);
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const isCalc = node => node.type === 'func' && calcFuncMatch.test(node.value);
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const isHue = node => isCalc(node) || node.type === 'number' && hueUnitMatch.test(node.unit);
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const isNumber = node => isCalc(node) || node.type === 'number' && node.unit === '';
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const isPercentage = node => isCalc(node) || node.type === 'number' && node.unit === '%';
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const isSlash = node => node.type === 'operator' && node.value === '/';
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const functionalLABMatch = [isNumber, isNumber, isNumber, isSlash, isAlphaValue];
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const functionalLCHMatch = [isNumber, isNumber, isHue, isSlash, isAlphaValue];
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const functionalGrayMatch = [isNumber, isSlash, isAlphaValue];
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const matchFunctionalLAB = children => children.every((child, index) => typeof functionalLABMatch[index] === 'function' && functionalLABMatch[index](child));
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const matchFunctionalLCH = children => children.every((child, index) => typeof functionalLCHMatch[index] === 'function' && functionalLCHMatch[index](child));
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const matchFunctionalGray = children => children.every((child, index) => typeof functionalGrayMatch[index] === 'function' && functionalGrayMatch[index](child));
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const newComma = () => parser.comma({
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value: ','
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});
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const newNumber = value => parser.number({
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value
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});
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const newParen = value => parser.paren({
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value
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});
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export default index;
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//# sourceMappingURL=index.es.mjs.map
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