@white-matrix/event-emitter
Version:
The Emitter can be used to expose an Event to the public to fire it from the insides.
174 lines (173 loc) • 6.53 kB
JavaScript
"use strict";
/* ---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*-------------------------------------------------------------------------------------------- */
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.LinkedList = void 0;
var Node = /** @class */ (function () {
function Node(element) {
this.element = element;
this.next = Node.Undefined;
this.prev = Node.Undefined;
}
Node.Undefined = new Node(undefined);
return Node;
}());
var LinkedList = /** @class */ (function () {
function LinkedList() {
this._first = Node.Undefined;
this._last = Node.Undefined;
this._size = 0;
}
Object.defineProperty(LinkedList.prototype, "size", {
get: function () {
return this._size;
},
enumerable: false,
configurable: true
});
LinkedList.prototype.isEmpty = function () {
return this._first === Node.Undefined;
};
LinkedList.prototype.clear = function () {
this._first = Node.Undefined;
this._last = Node.Undefined;
this._size = 0;
};
LinkedList.prototype.unshift = function (element) {
return this._insert(element, false);
};
LinkedList.prototype.push = function (element) {
return this._insert(element, true);
};
LinkedList.prototype.shift = function () {
if (this._first === Node.Undefined) {
return undefined;
}
else {
var res = this._first.element;
this._remove(this._first);
return res;
}
};
LinkedList.prototype.pop = function () {
if (this._last === Node.Undefined) {
return undefined;
}
else {
var res = this._last.element;
this._remove(this._last);
return res;
}
};
LinkedList.prototype[Symbol.iterator] = function () {
var node;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
node = this._first;
_a.label = 1;
case 1:
if (!(node !== Node.Undefined)) return [3 /*break*/, 3];
return [4 /*yield*/, node.element];
case 2:
_a.sent();
node = node.next;
return [3 /*break*/, 1];
case 3: return [2 /*return*/];
}
});
};
LinkedList.prototype.toArray = function () {
var result = [];
for (var node = this._first; node !== Node.Undefined; node = node.next) {
result.push(node.element);
}
return result;
};
LinkedList.prototype._insert = function (element, atTheEnd) {
var _this = this;
var newNode = new Node(element);
if (this._first === Node.Undefined) {
this._first = newNode;
this._last = newNode;
}
else if (atTheEnd) {
// push
var oldLast = this._last;
this._last = newNode;
newNode.prev = oldLast;
oldLast.next = newNode;
}
else {
// unshift
var oldFirst = this._first;
this._first = newNode;
newNode.next = oldFirst;
oldFirst.prev = newNode;
}
this._size += 1;
var didRemove = false;
return function () {
if (!didRemove) {
didRemove = true;
_this._remove(newNode);
}
};
};
LinkedList.prototype._remove = function (node) {
if (node.prev !== Node.Undefined && node.next !== Node.Undefined) {
// middle
var anchor = node.prev;
anchor.next = node.next;
node.next.prev = anchor;
}
else if (node.prev === Node.Undefined && node.next === Node.Undefined) {
// only node
this._first = Node.Undefined;
this._last = Node.Undefined;
}
else if (node.next === Node.Undefined) {
// last
this._last = this._last.prev;
this._last.next = Node.Undefined;
}
else if (node.prev === Node.Undefined) {
// first
this._first = this._first.next;
this._first.prev = Node.Undefined;
}
// done
this._size -= 1;
};
return LinkedList;
}());
exports.LinkedList = LinkedList;