464 lines
18 KiB
JavaScript
464 lines
18 KiB
JavaScript
/*! Icinga Web 2 | (c) 2019 Icinga GmbH | GPLv2+ */
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;(function(Icinga) {
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'use strict';
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Icinga.Behaviors = Icinga.Behaviors || {};
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let $ = window.$;
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try {
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$ = require('icinga/icinga-php-library/notjQuery');
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} catch (e) {
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console.warn('[Collapsible] notjQuery unavailable. Using jQuery for now');
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}
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/**
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* Behavior for collapsible containers.
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*
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* @param icinga Icinga The current Icinga Object
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*/
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class Collapsible extends Icinga.EventListener {
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constructor(icinga) {
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super(icinga);
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this.on('layout-change', this.onLayoutChange, this);
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this.on('rendered', '#main > .container, #modal-content', this.onRendered, this);
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this.on('click', '.collapsible + .collapsible-control, .collapsible .collapsible-control',
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this.onControlClicked, this);
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this.icinga = icinga;
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this.defaultVisibleRows = 2;
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this.defaultVisibleHeight = 36;
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this.state = new Icinga.Storage.StorageAwareMap.withStorage(
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Icinga.Storage.BehaviorStorage('collapsible'),
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'expanded'
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)
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.on('add', this.onExpand, this)
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.on('delete', this.onCollapse, this);
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}
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/**
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* Initializes all collapsibles. Triggered on rendering of a container.
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*
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* @param event Event The `onRender` event triggered by the rendered container
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*/
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onRendered(event) {
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let _this = event.data.self,
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toCollapse = [],
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toExpand = [];
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event.target.querySelectorAll('.collapsible').forEach(collapsible => {
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// Assumes that any newly rendered elements are expanded
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if (! ('canCollapse' in collapsible.dataset) && _this.canCollapse(collapsible)) {
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if (_this.setupCollapsible(collapsible)) {
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toCollapse.push([collapsible, _this.calculateCollapsedHeight(collapsible)]);
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} else if (_this.isDetails(collapsible)) {
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// Except if it's a <details> element, which may not be expanded by default
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toExpand.push(collapsible);
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}
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}
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});
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// Elements are all collapsed in a row now, after height calculations are done.
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// This avoids reflows since instantly collapsing an element will cause one if
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// the height of the next element is being calculated.
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for (const collapseInfo of toCollapse) {
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_this.collapse(collapseInfo[0], collapseInfo[1]);
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}
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for (const collapsible of toExpand) {
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_this.expand(collapsible);
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}
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}
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/**
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* Updates all collapsibles.
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*
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* @param event Event The `layout-change` event triggered by window resizing or column changes
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*/
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onLayoutChange(event) {
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let _this = event.data.self;
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let toCollapse = [];
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document.querySelectorAll('.collapsible').forEach(collapsible => {
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if ('canCollapse' in collapsible.dataset) {
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if (! _this.canCollapse(collapsible)) {
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let toggleSelector = collapsible.dataset.toggleElement;
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if (! this.isDetails(collapsible)) {
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if (! toggleSelector) {
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collapsible.nextElementSibling.remove();
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} else {
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let toggle = document.getElementById(toggleSelector);
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if (toggle) {
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toggle.classList.remove('collapsed');
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delete toggle.dataset.canCollapse;
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}
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}
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}
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delete collapsible.dataset.canCollapse;
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_this.expand(collapsible);
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}
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} else if (_this.canCollapse(collapsible) && _this.setupCollapsible(collapsible)) {
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// It's expanded but shouldn't
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toCollapse.push([collapsible, _this.calculateCollapsedHeight(collapsible)]);
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}
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});
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setTimeout(function () {
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for (const collapseInfo of toCollapse) {
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_this.collapse(collapseInfo[0], collapseInfo[1]);
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}
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}, 0);
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}
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/**
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* A collapsible got expanded in another window, try to apply this here as well
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*
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* @param {string} collapsiblePath
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*/
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onExpand(collapsiblePath) {
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let collapsible = document.querySelector(collapsiblePath);
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if (collapsible && 'canCollapse' in collapsible.dataset) {
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if ('stateCollapses' in collapsible.dataset) {
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this.collapse(collapsible, this.calculateCollapsedHeight(collapsible));
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} else {
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this.expand(collapsible);
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}
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}
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}
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/**
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* A collapsible got collapsed in another window, try to apply this here as well
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*
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* @param {string} collapsiblePath
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*/
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onCollapse(collapsiblePath) {
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let collapsible = document.querySelector(collapsiblePath);
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if (collapsible && this.canCollapse(collapsible)) {
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if ('stateCollapses' in collapsible.dataset) {
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this.expand(collapsible);
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} else {
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this.collapse(collapsible, this.calculateCollapsedHeight(collapsible));
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}
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}
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}
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/**
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* Event handler for toggling collapsibles. Switches the collapsed state of the respective container.
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*
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* @param event Event The `onClick` event triggered by the clicked collapsible-control element
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*/
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onControlClicked(event) {
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let _this = event.data.self,
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target = event.currentTarget;
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let collapsible = target.previousElementSibling;
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if ('collapsibleAt' in target.dataset) {
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collapsible = document.querySelector(target.dataset.collapsibleAt);
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} else if (! collapsible) {
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collapsible = target.closest('.collapsible');
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}
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if (! collapsible) {
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_this.icinga.logger.error(
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'[Collapsible] Collapsible control has no associated .collapsible: ', target);
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return;
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} else if ('noPersistence' in collapsible.dataset) {
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if (collapsible.classList.contains('collapsed')) {
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_this.expand(collapsible);
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} else {
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_this.collapse(collapsible, _this.calculateCollapsedHeight(collapsible));
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}
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} else {
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let collapsiblePath = _this.icinga.utils.getCSSPath(collapsible),
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stateCollapses = 'stateCollapses' in collapsible.dataset;
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if (_this.state.has(collapsiblePath)) {
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_this.state.delete(collapsiblePath);
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if (stateCollapses) {
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_this.expand(collapsible);
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} else {
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_this.collapse(collapsible, _this.calculateCollapsedHeight(collapsible));
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}
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} else {
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_this.state.set(collapsiblePath);
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if (stateCollapses) {
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_this.collapse(collapsible, _this.calculateCollapsedHeight(collapsible));
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} else {
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_this.expand(collapsible);
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}
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}
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}
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if (_this.isDetails(collapsible)) {
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// The browser handles these clicks as well, and would toggle the state again
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event.preventDefault();
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}
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}
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/**
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* Setup the given collapsible
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*
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* @param collapsible The given collapsible container element
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*
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* @returns {boolean} Whether it needs to collapse or not
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*/
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setupCollapsible(collapsible) {
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if (this.isDetails(collapsible)) {
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let summary = collapsible.querySelector(':scope > summary');
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if (! summary.classList.contains('collapsible-control')) {
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summary.classList.add('collapsible-control');
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}
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if (collapsible.open) {
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collapsible.dataset.stateCollapses = '';
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}
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} else if (!! collapsible.dataset.toggleElement) {
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let toggleSelector = collapsible.dataset.toggleElement,
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toggle = collapsible.querySelector(toggleSelector),
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externalToggle = false;
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if (! toggle) {
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if (collapsible.nextElementSibling && collapsible.nextElementSibling.matches(toggleSelector)) {
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toggle = collapsible.nextElementSibling;
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} else {
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externalToggle = true;
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toggle = document.getElementById(toggleSelector);
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}
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}
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if (! toggle) {
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if (externalToggle) {
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this.icinga.logger.error(
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'[Collapsible] External control with id `'
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+ toggleSelector
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+ '` not found for .collapsible',
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collapsible
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);
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} else {
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this.icinga.logger.error(
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'[Collapsible] Control `' + toggleSelector + '` not found in .collapsible', collapsible);
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}
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return false;
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} else if (externalToggle) {
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collapsible.dataset.hasExternalToggle = '';
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toggle.dataset.canCollapse = '';
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toggle.dataset.collapsibleAt = this.icinga.utils.getCSSPath(collapsible);
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$(toggle).on('click', e => {
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// Only required as onControlClicked() is compatible with Icinga.EventListener
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e.data = { self: this };
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this.onControlClicked(e);
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});
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} else if (! toggle.classList.contains('collapsible-control')) {
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toggle.classList.add('collapsible-control');
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}
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} else {
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setTimeout(function () {
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let collapsibleControl = document
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.getElementById('collapsible-control-ghost')
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.cloneNode(true);
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collapsibleControl.removeAttribute('id');
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collapsible.parentNode.insertBefore(collapsibleControl, collapsible.nextElementSibling);
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}, 0);
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}
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collapsible.dataset.canCollapse = '';
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if ('noPersistence' in collapsible.dataset) {
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return ! ('stateCollapses' in collapsible.dataset);
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}
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if ('stateCollapses' in collapsible.dataset) {
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return this.state.has(this.icinga.utils.getCSSPath(collapsible));
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} else {
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return ! this.state.has(this.icinga.utils.getCSSPath(collapsible));
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}
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}
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/**
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* Return an appropriate row element selector
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*
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* @param collapsible The given collapsible container element
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*
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* @returns {string}
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*/
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getRowSelector(collapsible) {
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if (!! collapsible.dataset.visibleHeight) {
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return '';
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}
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if (collapsible.tagName === 'TABLE') {
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return ':scope > tbody > tr';
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} else if (collapsible.tagName === 'UL' || collapsible.tagName === 'OL') {
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return ':scope > li:not(.collapsible-control)';
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}
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return '';
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}
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/**
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* Check whether the given collapsible needs to collapse
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*
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* @param collapsible The given collapsible container element
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*
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* @returns {boolean}
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*/
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canCollapse(collapsible) {
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if (this.isDetails(collapsible)) {
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return collapsible.querySelector(':scope > summary') !== null;
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}
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let rowSelector = this.getRowSelector(collapsible);
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if (!! rowSelector) {
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let visibleRows = Number(collapsible.dataset.visibleRows);
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if (isNaN(visibleRows)) {
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visibleRows = this.defaultVisibleRows;
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} else if (visibleRows === 0) {
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return true;
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}
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return collapsible.querySelectorAll(rowSelector).length > visibleRows * 2;
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} else {
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let maxHeight = Number(collapsible.dataset.visibleHeight);
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if (isNaN(maxHeight)) {
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maxHeight = this.defaultVisibleHeight;
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} else if (maxHeight === 0) {
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return true;
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}
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let actualHeight = collapsible.scrollHeight - parseFloat(
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window.getComputedStyle(collapsible).getPropertyValue('padding-top')
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);
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return actualHeight >= maxHeight * 2;
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}
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}
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/**
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* Calculate the height the given collapsible should have when collapsed
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*
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* @param collapsible
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*/
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calculateCollapsedHeight(collapsible) {
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let height;
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if (this.isDetails(collapsible)) {
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return -1;
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}
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let rowSelector = this.getRowSelector(collapsible);
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if (!! rowSelector) {
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height = collapsible.scrollHeight;
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height -= parseFloat(window.getComputedStyle(collapsible).getPropertyValue('padding-bottom'));
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let visibleRows = Number(collapsible.dataset.visibleRows);
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if (isNaN(visibleRows)) {
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visibleRows = this.defaultVisibleRows;
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}
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let rows = Array.from(collapsible.querySelectorAll(rowSelector)).slice(visibleRows);
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for (let i = 0; i < rows.length; i++) {
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let row = rows[i];
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if (row.previousElementSibling === null) { // very first element
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height -= row.offsetHeight;
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height -= parseFloat(window.getComputedStyle(row).getPropertyValue('margin-top'));
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} else if (i < rows.length - 1) { // every element but the last one
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let prevBottomBorderAt = row.previousElementSibling.offsetTop;
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prevBottomBorderAt += row.previousElementSibling.offsetHeight;
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height -= row.offsetTop - prevBottomBorderAt + row.offsetHeight;
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} else { // the last element
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height -= row.offsetHeight;
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height -= parseFloat(window.getComputedStyle(row).getPropertyValue('margin-top'));
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height -= parseFloat(window.getComputedStyle(row).getPropertyValue('margin-bottom'));
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}
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}
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} else {
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height = Number(collapsible.dataset.visibleHeight);
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if (isNaN(height)) {
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height = this.defaultVisibleHeight;
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}
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height += parseFloat(window.getComputedStyle(collapsible).getPropertyValue('padding-top'));
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if (
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!! collapsible.dataset.toggleElement
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&& ! ('hasExternalToggle' in collapsible.dataset)
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&& (! collapsible.nextElementSibling
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|| ! collapsible.nextElementSibling.matches(collapsible.dataset.toggleElement))
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) {
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let toggle = collapsible.querySelector(collapsible.dataset.toggleElement);
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height += toggle.offsetHeight; // TODO: Very expensive at times. (50ms+) Check why!
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height += parseFloat(window.getComputedStyle(toggle).getPropertyValue('margin-top'));
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height += parseFloat(window.getComputedStyle(toggle).getPropertyValue('margin-bottom'));
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}
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}
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return height;
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}
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/**
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* Collapse the given collapsible
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*
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* @param collapsible The given collapsible container element
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* @param toHeight {int} The height in pixels to collapse to
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*/
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collapse(collapsible, toHeight) {
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if (this.isDetails(collapsible)) {
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collapsible.open = false;
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} else {
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collapsible.style.cssText = 'display: block; height: ' + toHeight + 'px; padding-bottom: 0';
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if ('hasExternalToggle' in collapsible.dataset) {
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document.getElementById(collapsible.dataset.toggleElement).classList.add('collapsed');
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}
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}
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collapsible.classList.add('collapsed');
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}
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/**
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* Expand the given collapsible
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*
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* @param collapsible The given collapsible container element
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*/
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expand(collapsible) {
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collapsible.classList.remove('collapsed');
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if (this.isDetails(collapsible)) {
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collapsible.open = true;
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} else {
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collapsible.style.cssText = '';
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if ('hasExternalToggle' in collapsible.dataset) {
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document.getElementById(collapsible.dataset.toggleElement).classList.remove('collapsed');
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}
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}
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}
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/**
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* Get whether the given collapsible is a <details> element
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*
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* @param collapsible
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*
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* @return {Boolean}
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*/
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isDetails(collapsible) {
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return collapsible.tagName === 'DETAILS';
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}
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}
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Icinga.Behaviors.Collapsible = Collapsible;
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})(Icinga);
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