126 lines
4.5 KiB
JavaScript
126 lines
4.5 KiB
JavaScript
'use strict';
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exports.__esModule = true;
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var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
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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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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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var angles = {
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top: '0deg',
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right: '90deg',
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bottom: '180deg',
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left: '270deg'
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};
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function getArguments(node) {
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return node.nodes.reduce(function (list, child) {
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if (child.type !== 'div') {
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list[list.length - 1].push(child);
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} else {
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list.push([]);
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}
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return list;
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}, [[]]);
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}
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function isLessThan(a, b) {
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return a.unit === b.unit && parseFloat(a.number) >= parseFloat(b.number);
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}
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function optimise(decl) {
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if (!~decl.value.indexOf('gradient')) {
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return;
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}
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decl.value = (0, _postcssValueParser2.default)(decl.value).walk(function (node) {
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if (node.type !== 'function') {
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return false;
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}
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if (node.value === 'linear-gradient' || node.value === 'repeating-linear-gradient' || node.value === '-webkit-linear-gradient' || node.value === '-webkit-repeating-linear-gradient') {
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var _ret = function () {
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if (!node.nodes.length) {
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return {
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v: false
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};
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}
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var args = getArguments(node);
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if (node.nodes[0].value === 'to' && args[0].length === 3) {
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node.nodes = node.nodes.slice(2);
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node.nodes[0].value = angles[node.nodes[0].value];
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}
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var lastStop = null;
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args.forEach(function (arg, index) {
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if (!arg[2]) {
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return;
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}
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var isFinalStop = index === args.length - 1;
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var thisStop = (0, _postcssValueParser.unit)(arg[2].value);
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if (lastStop === null) {
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lastStop = thisStop;
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if (!isFinalStop && lastStop && lastStop.number === '0' && lastStop.unit !== 'deg') {
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arg[1].value = arg[2].value = '';
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}
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return;
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}
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if (isLessThan(lastStop, thisStop)) {
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arg[2].value = 0;
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}
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lastStop = thisStop;
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if (isFinalStop && arg[2].value === '100%') {
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arg[1].value = arg[2].value = '';
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}
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});
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return {
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v: false
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};
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}();
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if ((typeof _ret === 'undefined' ? 'undefined' : _typeof(_ret)) === "object") return _ret.v;
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}
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if (node.value === 'radial-gradient' || node.value === 'repeating-radial-gradient' || node.value === '-webkit-radial-gradient' || node.value === '-webkit-repeating-radial-gradient') {
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var _ret2 = function () {
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if (!node.nodes.length) {
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return {
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v: false
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};
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}
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var args = getArguments(node);
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var lastStop = void 0;
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args.forEach(function (arg) {
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if (!arg[2]) {
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return;
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}
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var thisStop = (0, _postcssValueParser.unit)(arg[2].value);
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if (!lastStop) {
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lastStop = thisStop;
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return;
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}
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if (isLessThan(lastStop, thisStop)) {
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arg[2].value = 0;
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}
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lastStop = thisStop;
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});
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return {
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v: false
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};
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}();
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if ((typeof _ret2 === 'undefined' ? 'undefined' : _typeof(_ret2)) === "object") return _ret2.v;
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}
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}).toString();
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}
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exports.default = _postcss2.default.plugin('postcss-minify-gradients', function () {
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return function (css) {
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return css.walkDecls(optimise);
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};
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});
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module.exports = exports['default']; |