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node_modules/autoprefixer/lib/hacks/cross-fade.js 2.52 KB
aaac7fed   liuqimichale   add
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  'use strict';
  
  function _defaults(obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; }
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : _defaults(subClass, superClass); }
  
  var Value = require('../value');
  var list = require('postcss').list;
  
  var CrossFade = function (_Value) {
      _inherits(CrossFade, _Value);
  
      function CrossFade() {
          _classCallCheck(this, CrossFade);
  
          return _possibleConstructorReturn(this, _Value.apply(this, arguments));
      }
  
      CrossFade.prototype.replace = function replace(string, prefix) {
          var _this2 = this;
  
          return list.space(string).map(function (value) {
              if (value.slice(0, +_this2.name.length + 1) !== _this2.name + '(') {
                  return value;
              }
  
              var close = value.lastIndexOf(')');
              var after = value.slice(close + 1);
              var args = value.slice(_this2.name.length + 1, close);
  
              if (prefix === '-webkit-') {
                  var match = args.match(/\d*.?\d+%?/);
                  if (match) {
                      args = args.slice(match[0].length).trim();
                      args += ', ' + match[0];
                  } else {
                      args += ', 0.5';
                  }
              }
              return prefix + _this2.name + '(' + args + ')' + after;
          }).join(' ');
      };
  
      return CrossFade;
  }(Value);
  
  Object.defineProperty(CrossFade, 'names', {
      enumerable: true,
      writable: true,
      value: ['cross-fade']
  });
  
  
  module.exports = CrossFade;