96 lines
3.2 KiB
TypeScript
96 lines
3.2 KiB
TypeScript
// (C) Copyright 2015 Martin Dougiamas
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Based on http://roblouie.com/article/198/using-gestures-in-the-ionic-2-beta/
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import { Directive, ElementRef, OnInit, Input, Output, EventEmitter } from '@angular/core';
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/**
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* Directive to suppress all events on an element. This is useful to prevent keyboard closing when clicking this element.
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*
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* This directive is based on some code posted by johnthackstonanderson in
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* https://github.com/ionic-team/ionic-plugin-keyboard/issues/81
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*
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* @description
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*
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* If nothing is supplied or string 'all', then all the default events will be suppressed. This is the recommended usage.
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*
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* If you only want to suppress a single event just pass the name of the event. If you want to suppress a set of events,
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* pass an array with the names of the events to suppress.
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*
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* Example usage:
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*
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* <a ion-button [core-suppress-events] (onClick)="toggle($event)">
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*/
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@Directive({
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selector: '[core-suppress-events]'
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})
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export class CoreSupressEventsDirective implements OnInit {
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@Input('core-suppress-events') suppressEvents: string | string[];
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@Output() onClick = new EventEmitter();
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protected element: HTMLElement;
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constructor(el: ElementRef) {
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this.element = el.nativeElement;
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}
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/**
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* Initialize event listeners.
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*/
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ngOnInit(): void {
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let events: string[];
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if (this.suppressEvents == 'all' || typeof this.suppressEvents == 'undefined' || this.suppressEvents === null) {
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// Suppress all events.
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events = ['click', 'mousedown', 'touchdown', 'touchmove', 'touchstart'];
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} else if (typeof this.suppressEvents == 'string') {
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// It's a string, just suppress this event.
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events = [this.suppressEvents];
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} else if (Array.isArray(this.suppressEvents)) {
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// Array supplied.
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events = this.suppressEvents;
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} else {
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events = [];
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}
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// Suppress the events.
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for (const evName of events) {
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this.element.addEventListener(evName, this.stopBubble.bind(this));
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}
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// Now listen to "click" events.
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this.element.addEventListener('mouseup', (event) => { // Triggered in Android & iOS.
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this.onClick.emit(event);
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});
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this.element.addEventListener('touchend', (event) => { // Triggered desktop & browser.
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this.stopBubble(event);
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this.onClick.emit(event);
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});
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}
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/**
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* Stop event default and propagation.
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*
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* @param {Event} event Event.
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*/
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protected stopBubble(event: Event): void {
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event.preventDefault();
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event.stopPropagation();
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}
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}
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