'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 _postcssValueParser = require('postcss-value-parser');
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var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);
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var _cssnanoUtilGetMatch = require('cssnano-util-get-match');
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var _cssnanoUtilGetMatch2 = _interopRequireDefault(_cssnanoUtilGetMatch);
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var _map = require('./lib/map');
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var _map2 = _interopRequireDefault(_map);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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const getMatch = (0, _cssnanoUtilGetMatch2.default)(_map2.default);
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const getValue = node => parseFloat(node.value);
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function evenValues(list, index) {
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return index % 2 === 0;
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}
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function reduce(node) {
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if (node.type !== 'function') {
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return false;
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}
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const lowerCasedValue = node.value.toLowerCase();
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if (lowerCasedValue === 'steps') {
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// Don't bother checking the step-end case as it has the same length
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// as steps(1)
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if (getValue(node.nodes[0]) === 1 && node.nodes[2] && node.nodes[2].value.toLowerCase() === 'start') {
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node.type = 'word';
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node.value = 'step-start';
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delete node.nodes;
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return;
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}
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// The end case is actually the browser default, so it isn't required.
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if (node.nodes[2] && node.nodes[2].value.toLowerCase() === 'end') {
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node.nodes = [node.nodes[0]];
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return;
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}
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return false;
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}
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if (lowerCasedValue === 'cubic-bezier') {
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const match = getMatch(node.nodes.filter(evenValues).map(getValue));
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if (match) {
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node.type = 'word';
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node.value = match;
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delete node.nodes;
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return;
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}
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}
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}
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exports.default = (0, _postcss.plugin)('postcss-normalize-timing-functions', () => {
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return css => {
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const cache = {};
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css.walkDecls(/(animation|transition)(-timing-function|$)/i, decl => {
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const value = decl.value;
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if (cache[value]) {
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decl.value = cache[value];
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return;
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}
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const result = (0, _postcssValueParser2.default)(value).walk(reduce).toString();
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decl.value = result;
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cache[value] = result;
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});
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};
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});
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module.exports = exports['default'];
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