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/*
** Zabbix
** Copyright (C) 2001-2021 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
const MENU_EXPAND_SELECTED_DELAY = 5000;
const MENU_EVENT_BLUR = 'blur';
const MENU_EVENT_EXPAND = 'expand';
const MENU_EVENT_FOCUS = 'focus';
class CMenu extends CBaseComponent {
constructor(target) {
super(target);
this.init();
this.registerEvents();
}
init() {
this._expanded_item = null;
this._selected_item = null;
this._items = [];
for (const el of this._target.childNodes) {
const item = new CMenuItem(el);
if (item.isExpanded()) {
this._expanded_item = item;
}
if (item.isSelected()) {
this._selected_item = item;
}
this._items.push(item);
}
if (this.hasClass('submenu')) {
this._target.style.maxHeight = this._target.scrollHeight + 'px';
}
}
getItems() {
return this._items;
}
collapseExpanded() {
this._expanded_item !== null && this._expanded_item.collapseSubmenu();
this._expanded_item = null;
}
expandSelected() {
if (this._selected_item !== null && this._selected_item !== this._expanded_item) {
this.collapseExpanded();
this._selected_item.hasSubmenu() && this._selected_item.expandSubmenu();
}
return this;
}
focusSelected() {
if (this._selected_item !== null) {
if (this._selected_item.hasSubmenu()) {
this.expandSelected();
this._selected_item.getSubmenu().focusSelected();
}
else {
this._selected_item.focus();
}
}
return this;
}
getExpanded() {
return this._expanded_item;
}
getSelected() {
return this._selected_item;
}
/**
* Register all DOM events.
*/
registerEvents() {
this._events = {
focus: (e) => {
if (!this._target.contains(e.relatedTarget)) {
this.fire((e.type === 'focusin') ? MENU_EVENT_FOCUS : MENU_EVENT_BLUR);
}
},
expand: (e) => {
this._expanded_item !== e.detail.target && this.collapseExpanded();
this._expanded_item = e.detail.target;
this.fire(MENU_EVENT_EXPAND, {menu_item: e.detail.target});
},
collapse: (e) => {
this._expanded_item = null;
}
};
this.on('focusin focusout', this._events.focus);
for (const item of this._items) {
if (item.hasSubmenu()) {
item.on(MENUITEM_EVENT_EXPAND, this._events.expand);
item.on(MENUITEM_EVENT_COLLAPSE, this._events.collapse);
}
}
}
}
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