ambari-logsearch/ambari-logsearch-web/src/app/components/context-menu/context-menu.component.ts

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

import {Component, OnChanges, SimpleChanges, Input, Output, EventEmitter, HostBinding} from '@angular/core';
import {ListItem} from '@app/classes/list-item';

@Component({
  selector: 'context-menu',
  templateUrl: './context-menu.component.html',
  styleUrls: ['./context-menu.component.less']
})
export class ContextMenuComponent implements OnChanges {

  ngOnChanges (changes: SimpleChanges): void {
    if (changes.isDisplayed && changes.isDisplayed.currentValue) {
      document.body.addEventListener('click', this.dismissContextMenu);
    }
  }

  @Input()
  @HostBinding('class.open')
  isDisplayed: boolean = false;

  @Input()
  contextMenuItems: ListItem[] = [];

  /**
   * 'left' CSS property value
   * @type {number}
   */
  @Input()
  leftPosition: number = 0;

  /**
   * 'top' CSS property value
   * @type {number}
   */
  @Input()
  topPosition: number = 0;

  @Output()
  contextMenuDismiss: EventEmitter<void> = new EventEmitter();

  @Output()
  itemSelect: EventEmitter<ListItem> = new EventEmitter();

  private dismissContextMenu = (): void => {
    this.isDisplayed = false;
    this.contextMenuDismiss.emit();
    document.body.removeEventListener('click', this.dismissContextMenu);
  };

  selectItem(event: ListItem): void {
    this.itemSelect.emit(event);
  }

}