1.0.0-rc.6

Author: eemeli

dist/Anchors.js

@@ -0,0 +1,148 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _Alias = _interopRequireDefault(require("./schema/Alias"));
+
+var _Map = _interopRequireDefault(require("./schema/Map"));
+
+var _Merge = _interopRequireDefault(require("./schema/Merge"));
+
+var _Scalar = _interopRequireDefault(require("./schema/Scalar"));
+
+var _Seq = _interopRequireDefault(require("./schema/Seq"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+var Anchors =
+/*#__PURE__*/
+function () {
+  function Anchors() {
+    _classCallCheck(this, Anchors);
+
+    _defineProperty(this, "map", {});
+  }
+
+  _createClass(Anchors, [{
+    key: "createAlias",
+    value: function createAlias(node, name) {
+      this.setAnchor(node, name);
+      return new _Alias.default(node);
+    }
+  }, {
+    key: "createMergePair",
+    value: function createMergePair() {
+      var _this = this;
+
+      var merge = new _Merge.default();
+
+      for (var _len = arguments.length, sources = new Array(_len), _key = 0; _key < _len; _key++) {
+        sources[_key] = arguments[_key];
+      }
+
+      merge.value.items = sources.map(function (s) {
+        if (s instanceof _Alias.default) {
+          if (s.source instanceof _Map.default) return s;
+        } else if (s instanceof _Map.default) {
+          return _this.createAlias(s);
+        }
+
+        throw new Error('Merge sources must be Map nodes or their Aliases');
+      });
+      return merge;
+    }
+  }, {
+    key: "getName",
+    value: function getName(node) {
+      var map = this.map;
+      return Object.keys(map).find(function (a) {
+        return map[a] === node;
+      });
+    }
+  }, {
+    key: "getNode",
+    value: function getNode(name) {
+      return this.map[name];
+    }
+  }, {
+    key: "newName",
+    value: function newName(prefix) {
+      var names = Object.keys(this.map);
+
+      for (var i = 1; true; ++i) {
+        var name = "".concat(prefix).concat(i);
+        if (!names.includes(name)) return name;
+      }
+    } // During parsing, map & aliases contain CST nodes
+
+  }, {
+    key: "resolveNodes",
+    value: function resolveNodes() {
+      var map = this.map,
+          _cstAliases = this._cstAliases;
+      Object.keys(map).forEach(function (a) {
+        map[a] = map[a].resolved;
+      });
+
+      _cstAliases.forEach(function (a) {
+        a.source = a.source.resolved;
+      });
+
+      delete this._cstAliases;
+    }
+  }, {
+    key: "setAnchor",
+    value: function setAnchor(node, name) {
+      if (node != null && !Anchors.validAnchorNode(node)) {
+        throw new Error('Anchors may only be set for Scalar, Seq and Map nodes');
+      }
+
+      if (name && /[\x00-\x19\s,[\]{}]/.test(name)) {
+        throw new Error('Anchor names must not contain whitespace or control characters');
+      }
+
+      var map = this.map;
+      var prev = node && Object.keys(map).find(function (a) {
+        return map[a] === node;
+      });
+
+      if (prev) {
+        if (!name) {
+          return prev;
+        } else if (prev !== name) {
+          delete map[prev];
+          map[name] = node;
+        }
+      } else {
+        if (!name) {
+          if (!node) return null;
+          name = this.newName('a');
+        }
+
+        map[name] = node;
+      }
+
+      return name;
+    }
+  }], [{
+    key: "validAnchorNode",
+    value: function validAnchorNode(node) {
+      return node instanceof _Scalar.default || node instanceof _Seq.default || node instanceof _Map.default;
+    }
+  }]);
+
+  return Anchors;
+}();
+
+exports.default = Anchors;