95 lines
3.3 KiB
JavaScript
95 lines
3.3 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _postcss = require('postcss');
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var _postcss2 = _interopRequireDefault(_postcss);
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var _postcssValueParser = require('postcss-value-parser');
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var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);
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var _convert = require('./lib/convert');
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var _convert2 = _interopRequireDefault(_convert);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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const LENGTH_UNITS = ['em', 'ex', 'ch', 'rem', 'vw', 'vh', 'vmin', 'vmax', 'cm', 'mm', 'q', 'in', 'pt', 'pc', 'px'];
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function parseWord(node, opts, keepZeroUnit) {
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const pair = (0, _postcssValueParser.unit)(node.value);
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if (pair) {
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const num = Number(pair.number);
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const u = pair.unit;
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if (num === 0) {
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node.value = keepZeroUnit || !~LENGTH_UNITS.indexOf(u.toLowerCase()) && u !== '%' ? 0 + u : 0;
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} else {
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node.value = (0, _convert2.default)(num, u, opts);
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if (typeof opts.precision === 'number' && u.toLowerCase() === 'px' && ~pair.number.indexOf('.')) {
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const precision = Math.pow(10, opts.precision);
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node.value = Math.round(parseFloat(node.value) * precision) / precision + u;
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}
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}
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}
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}
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function clampOpacity(node) {
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const pair = (0, _postcssValueParser.unit)(node.value);
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if (!pair) {
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return;
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}
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let num = Number(pair.number);
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if (num > 1) {
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node.value = 1 + pair.unit;
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} else if (num < 0) {
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node.value = 0 + pair.unit;
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}
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}
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function shouldStripPercent(decl) {
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const { parent } = decl;
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const lowerCasedProp = decl.prop.toLowerCase();
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return ~decl.value.indexOf('%') && (lowerCasedProp === 'max-height' || lowerCasedProp === 'height') || parent.parent && parent.parent.name && parent.parent.name.toLowerCase() === 'keyframes' && lowerCasedProp === 'stroke-dasharray' || lowerCasedProp === 'stroke-dashoffset' || lowerCasedProp === 'stroke-width';
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}
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function transform(opts, decl) {
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const lowerCasedProp = decl.prop.toLowerCase();
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if (~lowerCasedProp.indexOf('flex') || lowerCasedProp.indexOf('--') === 0) {
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return;
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}
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decl.value = (0, _postcssValueParser2.default)(decl.value).walk(node => {
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const lowerCasedValue = node.value.toLowerCase();
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if (node.type === 'word') {
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parseWord(node, opts, shouldStripPercent(decl));
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if (lowerCasedProp === 'opacity' || lowerCasedProp === 'shape-image-threshold') {
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clampOpacity(node);
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}
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} else if (node.type === 'function') {
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if (lowerCasedValue === 'calc' || lowerCasedValue === 'hsl' || lowerCasedValue === 'hsla') {
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(0, _postcssValueParser.walk)(node.nodes, n => {
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if (n.type === 'word') {
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parseWord(n, opts, true);
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}
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});
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return false;
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}
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if (lowerCasedValue === 'url') {
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return false;
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}
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}
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}).toString();
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}
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const plugin = 'postcss-convert-values';
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exports.default = _postcss2.default.plugin(plugin, (opts = { precision: false }) => {
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return css => css.walkDecls(transform.bind(null, opts));
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});
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module.exports = exports['default'];
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