--- /dev/null
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+
+var _Node = require('./Node');
+
+var _Node2 = _interopRequireDefault(_Node);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function Container(opts) {
+ var _this = this;
+
+ this.constructor(opts);
+
+ this.nodes = opts.nodes;
+
+ if (this.after === undefined) {
+ this.after = this.nodes.length > 0 ? this.nodes[this.nodes.length - 1].after : '';
+ }
+
+ if (this.before === undefined) {
+ this.before = this.nodes.length > 0 ? this.nodes[0].before : '';
+ }
+
+ if (this.sourceIndex === undefined) {
+ this.sourceIndex = this.before.length;
+ }
+
+ this.nodes.forEach(function (node) {
+ node.parent = _this; // eslint-disable-line no-param-reassign
+ });
+} /**\r
+ * A node that contains other nodes and support traversing over them\r
+ */
+
+Container.prototype = Object.create(_Node2.default.prototype);
+Container.constructor = _Node2.default;
+
+/**\r
+ * Iterate over descendant nodes of the node\r
+ *\r
+ * @param {RegExp|string} filter - Optional. Only nodes with node.type that\r
+ * satisfies the filter will be traversed over\r
+ * @param {function} cb - callback to call on each node. Takes theese params:\r
+ * node - the node being processed, i - it's index, nodes - the array\r
+ * of all nodes\r
+ * If false is returned, the iteration breaks\r
+ *\r
+ * @return (boolean) false, if the iteration was broken\r
+ */
+Container.prototype.walk = function walk(filter, cb) {
+ var hasFilter = typeof filter === 'string' || filter instanceof RegExp;
+ var callback = hasFilter ? cb : filter;
+ var filterReg = typeof filter === 'string' ? new RegExp(filter) : filter;
+
+ for (var i = 0; i < this.nodes.length; i++) {
+ var node = this.nodes[i];
+ var filtered = hasFilter ? filterReg.test(node.type) : true;
+ if (filtered && callback && callback(node, i, this.nodes) === false) {
+ return false;
+ }
+ if (node.nodes && node.walk(filter, cb) === false) {
+ return false;
+ }
+ }
+ return true;
+};
+
+/**\r
+ * Iterate over immediate children of the node\r
+ *\r
+ * @param {function} cb - callback to call on each node. Takes theese params:\r
+ * node - the node being processed, i - it's index, nodes - the array\r
+ * of all nodes\r
+ * If false is returned, the iteration breaks\r
+ *\r
+ * @return (boolean) false, if the iteration was broken\r
+ */
+Container.prototype.each = function each() {
+ var cb = arguments.length <= 0 || arguments[0] === undefined ? function () {} : arguments[0];
+
+ for (var i = 0; i < this.nodes.length; i++) {
+ var node = this.nodes[i];
+ if (cb(node, i, this.nodes) === false) {
+ return false;
+ }
+ }
+ return true;
+};
+
+exports.default = Container;
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