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/**@license sigplus Image Gallery Plus index image population for search results script
* @author Levente Hunyadi
* @version 1.5.0
* @remarks Copyright (C) 2009-2018 Levente Hunyadi
* @remarks Licensed under GNU/GPLv3, see http://www.gnu.org/licenses/gpl-3.0.html
* @see http://hunyadi.info.hu/projects/sigplus
**/
/*{"compilation_level":"ADVANCED_OPTIMIZATIONS"}*/
'use strict';
function __sigplusSearch(url, preview_url, width, height) {
// Internet Explorer supports Element.msMatchesSelector() but not Element.matches()
let matches = Element.prototype.matches || Element.prototype.msMatchesSelector;
/**
* Finds an ancestor element (or returns self) that matches a CSS selector.
* @param {Element} elem The element whose ancestor element to seek.
* @param {string} selector A CSS selector to match against.
* @return {Element} The element found or null.
*/
function closest(elem, selector) {
let ancestor = null;
while (elem) {
if (matches.call(elem, selector)) {
ancestor = elem;
break;
}
elem = elem.parentElement;
}
return ancestor;
}
/**
* Finds a next sibling element that matches a CSS selector.
* @param {Element} elem The element whose sibling element to seek.
* @param {string} selector A CSS selector to match against.
* @return {Element} The element found or null.
*/
function following(elem, selector) {
let follower = null;
if (elem) {
elem = elem.nextElementSibling;
while (elem) {
if (matches.call(elem, selector)) {
follower = elem;
break;
}
elem = elem.nextElementSibling;
}
}
return follower;
}
/**
* Redirects an Event from one element to another.
* Since an Event cannot be reused once it is thrown, it needs to be recreated before being dispatched.
* @param {string} eventType The type of the event to be redirected, e.g. 'click'.
* @param {!Element} fromElement The source element.
* @param {!Element} toElement The target element.
*/
function redirectEvent(eventType, fromElement, toElement) {
fromElement.addEventListener(eventType, function (event) {
toElement.dispatchEvent(new event.constructor(event.type, event));
event.preventDefault();
event.stopPropagation();
});
}
let resultlink = document.querySelector('.result-title a[href="' + url + '"]');
if (resultlink) {
let resulttext = following(closest(resultlink, '.result-title'), '.result-text');
if (resulttext) {
let image = /** @type {!HTMLImageElement} */ (document.createElement('img'));
image.classList.add('sigplus-search-preview');
image.src = preview_url;
image.width = width;
image.height = height;
redirectEvent('click', image, resultlink);
resulttext.insertBefore(image, resulttext.firstChild);
}
}
}
window['__sigplusSearch'] = __sigplusSearch;
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