89 lines
2.5 KiB
JavaScript
89 lines
2.5 KiB
JavaScript
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// This file and its minified version is adapted from https://github.com/BLE-LTER/Lunr-Index-and-Search-for-Static-Sites which is unlicensed.
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//
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"use strict";
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var LUNR_CONFIG = {
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"resultsElementId": "searchResults", // Element to contain results
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"countElementId": "resultCount" // Element showing number of results
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};
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// Get URL arguments
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function getParameterByName(name) {
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var url = window.location.href;
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name = name.replace(/[\[\]]/g, "\\$&");
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var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
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results = regex.exec(url);
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if (!results) return null;
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if (!results[2]) return "";
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return decodeURIComponent(results[2].replace(/\+/g, " "));
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}
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// Parse search results into HTML
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function parseLunrResults(results) {
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var html = [];
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for (var i = 0; i < results.length; i++) {
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var id = results[i]["ref"];
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var item = PREVIEW_LOOKUP[id]
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var title = item["t"];
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var preview = item["p"];
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var link = item["l"].replace("__site/", "");
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var result = ('<li><span class="result-title"><a href="' + link + '">'
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+ title + '</a></span>');
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html.push(result);
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}
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if (html.length) {
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html.join("");
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return '<ul>'+html+'</ul>'
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}
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else {
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return "";
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}
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}
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function escapeHtml(unsafe) {
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return unsafe
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.replace(/&/g, "&")
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.replace(/</g, "<")
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.replace(/>/g, ">")
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.replace(/"/g, """)
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.replace(/'/g, "'");
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}
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function showResultCount(total) {
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var element = document.getElementById(LUNR_CONFIG["countElementId"])
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if (element !== null) {
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element.innerHTML = total + ".";
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}
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}
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function searchLunr(query) {
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var idx = lunr.Index.load(LUNR_DATA);
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// Write results to page
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var results = idx.search(query);
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var resultHtml = parseLunrResults(results);
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var elementId = LUNR_CONFIG["resultsElementId"];
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document.getElementById(elementId).innerHTML = resultHtml;
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// Write the number of results
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showResultCount(results.length);
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}
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// When the window loads, read query parameters and perform search
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window.onload = function() {
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var query = getParameterByName("q");
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if (query != "" && query != null) {
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document.forms.lunrSearchForm.q.value = query;
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searchLunr(query);
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} else {
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// empty query: show 0 results (no query)
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showResultCount("0 (empty query)");
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}
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document.getElementById("focus").focus();
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};
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