69 lines
2.5 KiB
JavaScript
69 lines
2.5 KiB
JavaScript
|
/*---------------------------------------------------------------------------------------------
|
||
|
|
* Copyright (c) Microsoft Corporation. All rights reserved.
|
||
|
|
* Licensed under the MIT License. See License.txt in the project root for license information.
|
||
|
|
*--------------------------------------------------------------------------------------------*/
|
||
|
|
import { ArrayNavigator } from './iterator.js';
|
||
|
|
var HistoryNavigator = /** @class */ (function () {
|
||
|
|
function HistoryNavigator(history, limit) {
|
||
|
|
if (history === void 0) { history = []; }
|
||
|
|
if (limit === void 0) { limit = 10; }
|
||
|
|
this._initialize(history);
|
||
|
|
this._limit = limit;
|
||
|
|
this._onChange();
|
||
|
|
}
|
||
|
|
HistoryNavigator.prototype.add = function (t) {
|
||
|
|
this._history.delete(t);
|
||
|
|
this._history.add(t);
|
||
|
|
this._onChange();
|
||
|
|
};
|
||
|
|
HistoryNavigator.prototype.next = function () {
|
||
|
|
return this._navigator.next();
|
||
|
|
};
|
||
|
|
HistoryNavigator.prototype.previous = function () {
|
||
|
|
return this._navigator.previous();
|
||
|
|
};
|
||
|
|
HistoryNavigator.prototype.current = function () {
|
||
|
|
return this._navigator.current();
|
||
|
|
};
|
||
|
|
HistoryNavigator.prototype.parent = function () {
|
||
|
|
return null;
|
||
|
|
};
|
||
|
|
HistoryNavigator.prototype.first = function () {
|
||
|
|
return this._navigator.first();
|
||
|
|
};
|
||
|
|
HistoryNavigator.prototype.last = function () {
|
||
|
|
return this._navigator.last();
|
||
|
|
};
|
||
|
|
HistoryNavigator.prototype.has = function (t) {
|
||
|
|
return this._history.has(t);
|
||
|
|
};
|
||
|
|
HistoryNavigator.prototype._onChange = function () {
|
||
|
|
this._reduceToLimit();
|
||
|
|
this._navigator = new ArrayNavigator(this._elements, 0, this._elements.length, this._elements.length);
|
||
|
|
};
|
||
|
|
HistoryNavigator.prototype._reduceToLimit = function () {
|
||
|
|
var data = this._elements;
|
||
|
|
if (data.length > this._limit) {
|
||
|
|
this._initialize(data.slice(data.length - this._limit));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
HistoryNavigator.prototype._initialize = function (history) {
|
||
|
|
this._history = new Set();
|
||
|
|
for (var _i = 0, history_1 = history; _i < history_1.length; _i++) {
|
||
|
|
var entry = history_1[_i];
|
||
|
|
this._history.add(entry);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
Object.defineProperty(HistoryNavigator.prototype, "_elements", {
|
||
|
|
get: function () {
|
||
|
|
var elements = [];
|
||
|
|
this._history.forEach(function (e) { return elements.push(e); });
|
||
|
|
return elements;
|
||
|
|
},
|
||
|
|
enumerable: true,
|
||
|
|
configurable: true
|
||
|
|
});
|
||
|
|
return HistoryNavigator;
|
||
|
|
}());
|
||
|
|
export { HistoryNavigator };
|