// (C) Copyright 2015 Martin Dougiamas
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Based on http://roblouie.com/article/198/using-gestures-in-the-ionic-2-beta/

import { Directive, ElementRef, OnInit, OnDestroy, Output, EventEmitter } from '@angular/core';
import { Gesture } from 'ionic-angular/gestures/gesture';

/**
 * Directive to add long press actions to html elements.
 */
@Directive({
    selector: '[longPress]'
})
export class CoreLongPressDirective implements OnInit, OnDestroy {
    el: HTMLElement;
    pressGesture: Gesture;

    @Output() longPress = new EventEmitter();

    constructor(el: ElementRef) {
        this.el = el.nativeElement;
        this.el.setAttribute('tappable', '');
    }

    /**
     * Initialize gesture listening.
     */
    ngOnInit(): void {
        this.pressGesture = new Gesture(this.el);
        this.pressGesture.listen();
        this.pressGesture.on('press', (e) => {
            this.longPress.emit(e);
        });
    }

    /**
     * Destroy gesture listening.
     */
    ngOnDestroy(): void {
        this.pressGesture.destroy();
    }
}