--- /dev/null
+'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 Prefixer = require('./prefixer');
+var OldValue = require('./old-value');
+var utils = require('./utils');
+
+var vendor = require('postcss').vendor;
+
+var Value = function (_Prefixer) {
+ _inherits(Value, _Prefixer);
+
+ function Value() {
+ _classCallCheck(this, Value);
+
+ return _possibleConstructorReturn(this, _Prefixer.apply(this, arguments));
+ }
+
+ /**
+ * Clone decl for each prefixed values
+ */
+ Value.save = function save(prefixes, decl) {
+ var _this2 = this;
+
+ var prop = decl.prop;
+ var result = [];
+
+ var _loop = function _loop(prefix) {
+ var value = decl._autoprefixerValues[prefix];
+
+ if (value === decl.value) {
+ return 'continue';
+ }
+
+ var item = void 0;
+ var propPrefix = vendor.prefix(prop);
+
+ if (propPrefix === '-pie-') {
+ return 'continue';
+ }
+
+ if (propPrefix === prefix) {
+ item = decl.value = value;
+ result.push(item);
+ return 'continue';
+ }
+
+ var prefixed = prefixes.prefixed(prop, prefix);
+ var rule = decl.parent;
+
+ if (!rule.every(function (i) {
+ return i.prop !== prefixed;
+ })) {
+ result.push(item);
+ return 'continue';
+ }
+
+ var trimmed = value.replace(/\s+/, ' ');
+ var already = rule.some(function (i) {
+ return i.prop === decl.prop && i.value.replace(/\s+/, ' ') === trimmed;
+ });
+
+ if (already) {
+ result.push(item);
+ return 'continue';
+ }
+
+ var cloned = _this2.clone(decl, { value: value });
+ item = decl.parent.insertBefore(decl, cloned);
+
+ result.push(item);
+ };
+
+ for (var prefix in decl._autoprefixerValues) {
+ var _ret = _loop(prefix);
+
+ if (_ret === 'continue') continue;
+ }
+
+ return result;
+ };
+
+ /**
+ * Is declaration need to be prefixed
+ */
+
+
+ Value.prototype.check = function check(decl) {
+ var value = decl.value;
+ if (value.indexOf(this.name) === -1) {
+ return false;
+ }
+
+ return !!value.match(this.regexp());
+ };
+
+ /**
+ * Lazy regexp loading
+ */
+
+
+ Value.prototype.regexp = function regexp() {
+ return this.regexpCache || (this.regexpCache = utils.regexp(this.name));
+ };
+
+ /**
+ * Add prefix to values in string
+ */
+
+
+ Value.prototype.replace = function replace(string, prefix) {
+ return string.replace(this.regexp(), '$1' + prefix + '$2');
+ };
+
+ /**
+ * Get value with comments if it was not changed
+ */
+
+
+ Value.prototype.value = function value(decl) {
+ if (decl.raws.value && decl.raws.value.value === decl.value) {
+ return decl.raws.value.raw;
+ } else {
+ return decl.value;
+ }
+ };
+
+ /**
+ * Save values with next prefixed token
+ */
+
+
+ Value.prototype.add = function add(decl, prefix) {
+ if (!decl._autoprefixerValues) {
+ decl._autoprefixerValues = {};
+ }
+ var value = decl._autoprefixerValues[prefix] || this.value(decl);
+
+ var before = void 0;
+ do {
+ before = value;
+ value = this.replace(value, prefix);
+ if (value === false) return;
+ } while (value !== before);
+
+ decl._autoprefixerValues[prefix] = value;
+ };
+
+ /**
+ * Return function to fast find prefixed value
+ */
+
+
+ Value.prototype.old = function old(prefix) {
+ return new OldValue(this.name, prefix + this.name);
+ };
+
+ return Value;
+}(Prefixer);
+
+module.exports = Value;
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