var searchCache = null; var searchCacheKey = 'search_cache_v1'; var searchFunc = function(path, filter, wrapperId, searchId, contentId) { function getAllCombinations(keywords) { const result = []; const maxLen = 3; // 组合最大长度 for (let i = 0; i < keywords.length; i++) { for (let j = i + 1; j <= Math.min(i + maxLen, keywords.length); j++) { result.push(keywords.slice(i, j).join(" ")); } } return result; } function escapeRegExp(string) { return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); } function initSearch(datas) { var $input = document.getElementById(searchId); if (!$input) { return; } if ($input._searchInitialized) return; // 防止重复绑定 $input._searchInitialized = true; var $resultContent = document.getElementById(contentId); var $wrapper = document.getElementById(wrapperId); $input.addEventListener("input", function() { var resultList = []; var keywords = getAllCombinations(this.value.trim().toLowerCase().split(" ")) .sort(function(a,b) { return b.split(" ").length - a.split(" ").length; }); $resultContent.innerHTML = ""; if (this.value.trim().length <= 0) { $wrapper.setAttribute('searching', 'false'); return; } $wrapper.setAttribute('searching', 'true'); datas.forEach(function(data) { if (!data.content?.trim().length) return; if (filter && !data.path.includes(filter)) return; var matches = 0; var dataTitle = data.title?.trim() || 'Untitled'; var dataTitleLowerCase = dataTitle.toLowerCase(); var dataContent = data.content; var dataContentLowerCase = dataContent.toLowerCase(); var dataUrl = data.path.startsWith('//') ? data.path.slice(1) : data.path; dataUrl = dataUrl.replace(/\/?index\.html$/, '/'); // index.html → / dataUrl = dataUrl.replace(/\.html$/, '/'); // xxx.html → xxx/ var indexTitle = -1; var indexContent = -1; var firstOccur = -1; keywords.forEach(function(keyword) { indexTitle = dataTitleLowerCase.indexOf(keyword); indexContent = dataContentLowerCase.indexOf(keyword); if (indexTitle >= 0 || indexContent >= 0) { matches += 1; if (indexContent < 0) indexContent = 0; if (firstOccur < 0) firstOccur = indexContent; } }); if (matches > 0) { const li = document.createElement('li'); const a = document.createElement('a'); a.href = dataUrl; const titleSpan = document.createElement('span'); titleSpan.className = 'search-result-title'; titleSpan.textContent = dataTitle; a.appendChild(titleSpan); if (firstOccur >= 0) { var start = Math.max(0, firstOccur - 20); var end = Math.min(dataContent.length, firstOccur + 80); if (start === 0) end = 100; var matchContent = dataContent.substring(start, end); var regS = new RegExp(keywords.map(escapeRegExp).join("|"), "gi"); matchContent = matchContent.replace(regS, function(keyword) { return "" + keyword + ""; }); const para = document.createElement('p'); para.className = 'search-result-content'; para.innerHTML = matchContent + '...'; a.appendChild(para); } li.appendChild(a); resultList.push({ rank: matches, element: li }); } }); if (resultList.length) { resultList.sort(function(a, b) { return b.rank - a.rank; }); const ul = document.createElement('ul'); ul.className = 'search-result-list'; resultList.forEach(function(item) { ul.appendChild(item.element); }); $resultContent.innerHTML = ''; $resultContent.appendChild(ul); } }); } if (!searchCache) { // 数据还没准备好，延迟初始化 const timer = setInterval(() => { if (searchCache) { clearInterval(timer); initSearch(searchCache); } }, 100); } else { initSearch(searchCache); } }; utils.jq(() => { (function preloadSearchData() { var path = ctx.search.path; if (path.startsWith('/')) { path = path.substring(1); } path = ctx.root + path; try { var cached = localStorage.getItem(searchCacheKey); if (cached) { searchCache = JSON.parse(cached); } } catch (e) { console.warn('搜索缓存解析失败', e); } fetch(path) .then(res => res.json()) .then(json => { searchCache = json; try { localStorage.setItem(searchCacheKey, JSON.stringify(json)); } catch (e) { console.warn('搜索缓存写入失败', e); } }); })(); var $inputArea = $("input#search-input"); if ($inputArea.length == 0) return; var $resultArea = document.querySelector("div#search-result"); $inputArea.focus(function() { var path = ctx.search.path; if (path.startsWith('/')) { path = path.substring(1); } path = ctx.root + path; const filter = $inputArea.attr('data-filter') || ''; searchFunc(path, filter, 'search-wrapper', 'search-input', 'search-result'); }); $inputArea.keydown(function(e) { if (e.which == 13) { e.preventDefault(); } }); const observer = new MutationObserver(function(mutationsList) { const hasResults = $resultArea.querySelector(".search-result-list li"); $('.search-wrapper').toggleClass('noresult', !hasResults); }); observer.observe($resultArea, { childList: true, subtree: true }); });