@theia/core/lib/browser/tree/search-box-debounce.js

"use strict";
// *****************************************************************************
// Copyright (C) 2018 TypeFox and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// http://www.eclipse.org/legal/epl-2.0.
//
// This Source Code may also be made available under the following Secondary
// Licenses when the conditions for such availability set forth in the Eclipse
// Public License v. 2.0 are satisfied: GNU General Public License, version 2
// with the GNU Classpath Exception which is available at
// https://www.gnu.org/software/classpath/license.html.
//
// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0
// *****************************************************************************
Object.defineProperty(exports, "__esModule", { value: true });
exports.SearchBoxDebounce = exports.SearchBoxDebounceOptions = void 0;
const event_1 = require("../../common/event");
const disposable_1 = require("../../common/disposable");
const debounce = require("lodash.debounce");
var SearchBoxDebounceOptions;
(function (SearchBoxDebounceOptions) {
    /**
     * The default debounce option.
     */
    SearchBoxDebounceOptions.DEFAULT = {
        delay: 200
    };
})(SearchBoxDebounceOptions = exports.SearchBoxDebounceOptions || (exports.SearchBoxDebounceOptions = {}));
/**
 * It notifies the clients, once if the underlying search term has changed after a given amount of delay.
 */
class SearchBoxDebounce {
    constructor(options) {
        this.options = options;
        this.disposables = new disposable_1.DisposableCollection();
        this.emitter = new event_1.Emitter();
        this.disposables.push(this.emitter);
        this.handler = debounce(() => this.fireChanged(this.state), this.options.delay).bind(this);
    }
    append(input) {
        if (input === undefined) {
            this.reset();
            return undefined;
        }
        if (this.state === undefined) {
            this.state = input;
        }
        else {
            if (input === '\b') {
                this.state = this.state.length === 1 ? '' : this.state.substring(0, this.state.length - 1);
            }
            else {
                this.state += input;
            }
        }
        this.handler();
        return this.state;
    }
    get onChanged() {
        return this.emitter.event;
    }
    dispose() {
        this.disposables.dispose();
    }
    fireChanged(value) {
        this.emitter.fire(value);
    }
    reset() {
        this.state = undefined;
        this.fireChanged(undefined);
    }
}
exports.SearchBoxDebounce = SearchBoxDebounce;
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