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/*
** Copyright (C) 2001-2025 Zabbix SIA
**
** This program is free software: you can redistribute it and/or modify it under the terms of
** the GNU Affero General Public License as published by the Free Software Foundation, version 3.
**
** 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 Affero General Public License for more details.
**
** You should have received a copy of the GNU Affero General Public License along with this program.
** If not, see <https://www.gnu.org/licenses/>.
**/
const EXPANDABLE_SUBFILTER_EVENT_EXPAND = 'expand';
const ZBX_STYLE_EXPANDED = 'expanded';
const ZBX_STYLE_HIDDEN = 'hidden';
// Empty space in pixels reserved for expand button.
const ZBX_EXPAND_BUTTON_SIZE = 40;
class CExpandableSubfilter extends CBaseComponent {
constructor(target) {
super(target);
this.init();
}
init() {
if (this._target.classList.contains(ZBX_STYLE_EXPANDED) || !this.isOverflowing()) {
return;
}
this._target.append(this.makeExpandButton());
const resize_observer = new ResizeObserver(() => this.hideOverflown());
resize_observer.observe(this._target);
}
hideOverflown() {
const isOverflown = (element) => {
return element.offsetTop + element.offsetHeight > this._target.offsetHeight
|| ZBX_EXPAND_BUTTON_SIZE > this._target.offsetWidth - element.offsetLeft - element.offsetWidth;
};
this._target.querySelectorAll(`.subfilter.${ZBX_STYLE_HIDDEN}`).forEach((element) => {
element.classList.remove(ZBX_STYLE_HIDDEN);
});
let last = this._target.querySelector('div').lastChild;
while (last !== null && isOverflown(last)) {
last.classList.add(ZBX_STYLE_HIDDEN);
last = last.previousSibling;
}
}
makeExpandButton() {
this.btn_expand = document.createElement('button');
this.btn_expand.classList.add(ZBX_ICON_MORE);
this.btn_expand.addEventListener('click', () => {
this._target.classList.add(ZBX_STYLE_EXPANDED);
this.btn_expand.remove();
this.fire(EXPANDABLE_SUBFILTER_EVENT_EXPAND, {name: this._target.dataset.name});
});
return this.btn_expand;
}
isOverflowing() {
return this._target.clientHeight < this._target.scrollHeight;
}
}
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