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* Minified by jsDelivr using Terser v5.48.0.\n * Original file: /npm/hexo-theme-butterfly@5.6.1/source/js/search/local-search.js\n *\n * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files\n */\n","/**\n * Refer to hexo-generator-searchdb\n * https://github.com/next-theme/hexo-generator-searchdb/blob/main/dist/search.js\n * Modified by hexo-theme-butterfly\n */\n\nclass LocalSearch {\n constructor ({\n path = '',\n unescape = false,\n top_n_per_article = 1\n }) {\n this.path = path\n this.unescape = unescape\n this.top_n_per_article = top_n_per_article\n this.isfetched = false\n this.datas = null\n this._unescapeDiv = unescape ? document.createElement('div') : null\n this._processedKeywords = null\n }\n\n _processKeywords (keywords) {\n if (this._processedKeywords) return this._processedKeywords\n this._processedKeywords = keywords.map(word => {\n if (this.unescape) {\n this._unescapeDiv.innerText = word\n return this._unescapeDiv.innerHTML\n }\n return word\n })\n return this._processedKeywords\n }\n\n getIndexByWord (words, text, caseSensitive = false) {\n const index = []\n const included = new Set()\n const processedWords = this._processKeywords(words)\n\n if (!caseSensitive) {\n text = text.toLowerCase()\n }\n processedWords.forEach((word, i) => {\n const wordLen = word.length\n if (wordLen === 0) return\n let startPosition = 0\n let position = -1\n const searchWord = caseSensitive ? word : word.toLowerCase()\n while ((position = text.indexOf(searchWord, startPosition)) > -1) {\n index.push({ position, word })\n included.add(words[i])\n startPosition = position + wordLen\n }\n })\n // Sort index by position of keyword\n index.sort((left, right) => {\n if (left.position !== right.position) {\n return left.position - right.position\n }\n return right.word.length - left.word.length\n })\n return [index, included]\n }\n\n // Merge hits into slices\n mergeIntoSlice (start, end, index) {\n let item = index[0]\n let { position, word } = item\n const hits = []\n const count = new Set()\n while (position + word.length <= end && index.length !== 0) {\n count.add(word)\n hits.push({\n position,\n length: word.length\n })\n const wordEnd = position + word.length\n\n // Move to next position of hit\n index.shift()\n while (index.length !== 0) {\n item = index[0]\n position = item.position\n word = item.word\n if (wordEnd > position) {\n index.shift()\n } else {\n break\n }\n }\n }\n return {\n hits,\n start,\n end,\n count: count.size\n }\n }\n\n // Highlight title and content\n highlightKeyword (val, slice) {\n const parts = []\n let index = slice.start\n for (const { position, length } of slice.hits) {\n parts.push(val.substring(index, position))\n index = position + length\n parts.push(`${val.substring(position, position + length)}`)\n }\n parts.push(val.substring(index, slice.end))\n return parts.join('')\n }\n\n getResultItems (keywords) {\n const resultItems = []\n this._processedKeywords = null\n // Compute highlight param once instead of per-article\n const highlightParam = keywords.join(' ')\n this.datas.forEach(({ title, content, url }) => {\n // The number of different keywords included in the article.\n const [indexOfTitle, keysOfTitle] = this.getIndexByWord(keywords, title)\n const [indexOfContent, keysOfContent] = this.getIndexByWord(keywords, content)\n const includedCount = new Set([...keysOfTitle, ...keysOfContent]).size\n\n // Show search results\n const hitCount = indexOfTitle.length + indexOfContent.length\n if (hitCount === 0) return\n\n const slicesOfTitle = []\n if (indexOfTitle.length !== 0) {\n slicesOfTitle.push(this.mergeIntoSlice(0, title.length, indexOfTitle))\n }\n\n let slicesOfContent = []\n while (indexOfContent.length !== 0) {\n const item = indexOfContent[0]\n const { position } = item\n // Cut out 120 characters. The maxlength of .search-input is 80.\n const start = Math.max(0, position - 20)\n const end = Math.min(content.length, position + 100)\n slicesOfContent.push(this.mergeIntoSlice(start, end, indexOfContent))\n }\n\n // Sort slices in content by included keywords' count and hits' count\n slicesOfContent.sort((left, right) => {\n if (left.count !== right.count) {\n return right.count - left.count\n } else if (left.hits.length !== right.hits.length) {\n return right.hits.length - left.hits.length\n }\n return left.start - right.start\n })\n\n // Select top N slices in content\n const upperBound = parseInt(this.top_n_per_article, 10)\n if (upperBound >= 0) {\n slicesOfContent = slicesOfContent.slice(0, upperBound)\n }\n\n let resultItem = ''\n\n url = new URL(url, location.origin)\n url.searchParams.append('highlight', highlightParam)\n\n if (slicesOfTitle.length !== 0) {\n resultItem += `
  • ${this.highlightKeyword(title, slicesOfTitle[0])}`\n } else {\n resultItem += `
  • ${title}`\n }\n\n slicesOfContent.forEach(slice => {\n resultItem += `

    ${this.highlightKeyword(content, slice)}...

    `\n })\n\n resultItem += '
    • '\n resultItems.push({\n item: resultItem,\n id: resultItems.length,\n hitCount,\n includedCount\n })\n })\n return resultItems\n }\n\n fetchData () {\n const isXml = !this.path.endsWith('json')\n fetch(this.path)\n .then(response => {\n if (!response.ok) throw new Error(`HTTP ${response.status}: ${response.statusText}`)\n return response.text()\n })\n .then(res => {\n // Get the contents from search data\n this.isfetched = true\n this.datas = isXml\n ? [...new DOMParser().parseFromString(res, 'text/xml').querySelectorAll('entry')].map(element => ({\n title: element.querySelector('title').textContent,\n content: element.querySelector('content').textContent,\n url: element.querySelector('url').textContent\n }))\n : JSON.parse(res)\n // Only match articles with non-empty titles\n this.datas = this.datas.filter(data => data.title).map(data => {\n data.title = data.title.trim()\n data.content = data.content ? data.content.trim().replace(/<[^>]+>/g, '') : ''\n data.url = decodeURIComponent(data.url).replace(/\\/{2,}/g, '/')\n return data\n })\n // Remove loading animation\n window.dispatchEvent(new Event('search:loaded'))\n })\n .catch(error => {\n console.error('Local search data fetch failed:', error)\n this.isfetched = true\n this.datas = []\n window.dispatchEvent(new Event('search:loaded'))\n })\n }\n\n // Highlight by wrapping node in mark elements with the given class name\n highlightText (node, slice, className) {\n const val = node.nodeValue\n let index = slice.start\n const children = []\n for (const { position, length } of slice.hits) {\n const text = document.createTextNode(val.substring(index, position))\n index = position + length\n const mark = document.createElement('mark')\n mark.className = className\n mark.appendChild(document.createTextNode(val.substring(position, position + length)))\n children.push(text, mark)\n }\n node.nodeValue = val.substring(index, slice.end)\n children.forEach(element => {\n node.parentNode.insertBefore(element, node)\n })\n }\n\n // Highlight the search words provided in the url in the text\n highlightSearchWords (body) {\n const params = new URL(location.href).searchParams.get('highlight')\n const keywords = params ? params.split(' ') : []\n if (!keywords.length || !body) return\n const walk = document.createTreeWalker(body, NodeFilter.SHOW_TEXT, null)\n const allNodes = []\n while (walk.nextNode()) {\n if (!walk.currentNode.parentNode.matches('button, select, textarea, .mermaid')) allNodes.push(walk.currentNode)\n }\n allNodes.forEach(node => {\n const [indexOfNode] = this.getIndexByWord(keywords, node.nodeValue)\n if (!indexOfNode.length) return\n const slice = this.mergeIntoSlice(0, node.nodeValue.length, indexOfNode)\n this.highlightText(node, slice, 'search-keyword')\n })\n }\n}\n\nwindow.addEventListener('load', () => {\n // Search\n const { path, top_n_per_article, unescape, languages, pagination } = GLOBAL_CONFIG.localSearch\n const enablePagination = pagination && pagination.enable\n const localSearch = new LocalSearch({\n path,\n top_n_per_article,\n unescape\n })\n\n const $input = document.querySelector('.local-search-input input')\n const $statsItem = document.getElementById('local-search-stats')\n const $loadingStatus = document.getElementById('loading-status')\n const $searchMask = document.getElementById('search-mask')\n const $searchDialog = document.querySelector('#local-search .search-dialog')\n const $results = document.getElementById('local-search-results')\n const $pagination = document.getElementById('local-search-pagination')\n const $paginationList = document.querySelector('#local-search-pagination .ais-Pagination-list')\n const isXml = !path.endsWith('json')\n\n // Pagination variables (only initialize if pagination is enabled)\n let currentPage = 0\n const hitsPerPage = pagination.hitsPerPage || 10\n\n let currentResultItems = []\n\n if (!enablePagination) {\n currentPage = undefined\n currentResultItems = undefined\n }\n\n // Show/hide search results area\n const toggleResultsVisibility = hasResults => {\n $pagination.style.display = (hasResults && enablePagination) ? '' : 'none'\n }\n\n // Render search results for current page\n const renderResults = (searchText, resultItems) => {\n // Determine items to display based on pagination mode\n const itemsToDisplay = enablePagination\n ? currentResultItems.slice(currentPage * hitsPerPage, (currentPage + 1) * hitsPerPage)\n : resultItems\n\n // Handle empty page in pagination mode\n if (enablePagination && itemsToDisplay.length === 0 && currentResultItems.length > 0) {\n currentPage = 0\n renderResults(searchText, resultItems)\n return\n }\n\n // Add numbering to items\n const numberedItems = itemsToDisplay.map((result, index) => {\n const itemNumber = enablePagination\n ? currentPage * hitsPerPage + index + 1\n : index + 1\n return result.item.replace(\n '
  • ',\n `
  • `\n )\n })\n\n $results.innerHTML = `
      ${numberedItems.join('')}
    `\n\n // Update stats\n const displayCount = enablePagination ? currentResultItems.length : resultItems.length\n const stats = languages.hits_stats.replace(/\\$\\{hits}/, displayCount)\n $statsItem.innerHTML = `
    ${stats}
    `\n\n // Handle pagination\n if (enablePagination) {\n const nbPages = Math.ceil(currentResultItems.length / hitsPerPage)\n renderPagination(currentPage, nbPages, searchText)\n }\n\n const hasResults = resultItems.length > 0\n toggleResultsVisibility(hasResults)\n\n window.pjax && window.pjax.refresh($results)\n }\n\n // Render pagination\n const renderPagination = (page, nbPages) => {\n if (nbPages <= 1) {\n $pagination.style.display = 'none'\n $paginationList.innerHTML = ''\n return\n }\n\n const isFirstPage = page === 0\n const isLastPage = page === nbPages - 1\n\n // Responsive page display\n const isMobile = window.innerWidth < 768\n const maxVisiblePages = isMobile ? 3 : 5\n let startPage = Math.max(0, page - Math.floor(maxVisiblePages / 2))\n const endPage = Math.min(nbPages - 1, startPage + maxVisiblePages - 1)\n\n // Adjust starting page to maintain max visible pages\n if (endPage - startPage + 1 < maxVisiblePages) {\n startPage = Math.max(0, endPage - maxVisiblePages + 1)\n }\n\n const parts = []\n\n // Only add ellipsis and first page when there are many pages\n if (nbPages > maxVisiblePages && startPage > 0) {\n parts.push('
  • 1
    • ')\n if (startPage > 1) {\n parts.push('
  • ...
    • ')\n }\n }\n\n // Add middle page numbers\n for (let i = startPage; i <= endPage; i++) {\n if (i === page) {\n parts.push(`
  • ${i + 1}
    • `)\n } else {\n parts.push(`
  • ${i + 1}
    • `)\n }\n }\n\n // Only add ellipsis and last page when there are many pages\n if (nbPages > maxVisiblePages && endPage < nbPages - 1) {\n if (endPage < nbPages - 2) {\n parts.push('
  • ...
    • ')\n }\n parts.push(`
  • ${nbPages}
    • `)\n }\n\n // Build prev/next links\n const prevLink = isFirstPage\n ? ''\n : ``\n const nextLink = isLastPage\n ? ''\n : ``\n\n $paginationList.innerHTML = `
  • ${prevLink}
    • ${parts.join('')}
  • ${nextLink}
    • `\n $pagination.style.display = ''\n }\n\n // Clear search results and stats\n const clearSearchResults = () => {\n $results.textContent = ''\n $statsItem.textContent = ''\n toggleResultsVisibility(false)\n if (enablePagination) {\n currentResultItems = []\n currentPage = 0\n }\n }\n\n // Show no results message\n const showNoResults = searchText => {\n $results.textContent = ''\n const statsDiv = document.createElement('div')\n statsDiv.className = 'search-result-stats'\n statsDiv.textContent = languages.hits_empty.replace(/\\$\\{query}/, searchText)\n $statsItem.innerHTML = statsDiv.outerHTML\n toggleResultsVisibility(false)\n if (enablePagination) {\n currentResultItems = []\n currentPage = 0\n }\n }\n\n const inputEventFunction = () => {\n if (!localSearch.isfetched) return\n let searchText = $input.value.trim().toLowerCase()\n isXml && (searchText = searchText.replace(//g, '>'))\n\n if (searchText !== '') $loadingStatus.hidden = false\n\n const keywords = searchText.split(/[-\\s]+/)\n let resultItems = []\n\n if (searchText.length > 0) {\n resultItems = localSearch.getResultItems(keywords)\n }\n\n if (keywords.length === 1 && keywords[0] === '') {\n clearSearchResults()\n } else if (resultItems.length === 0) {\n showNoResults(searchText)\n } else {\n // Sort results by relevance\n resultItems.sort((left, right) => {\n if (left.includedCount !== right.includedCount) {\n return right.includedCount - left.includedCount\n } else if (left.hitCount !== right.hitCount) {\n return right.hitCount - left.hitCount\n }\n return right.id - left.id\n })\n\n if (enablePagination) {\n currentResultItems = resultItems\n currentPage = 0\n }\n renderResults(searchText, resultItems)\n }\n\n $loadingStatus.hidden = true\n }\n\n // Debounced input handler\n let searchTimeout\n const debouncedInputEvent = () => {\n clearTimeout(searchTimeout)\n // Empty input: clear results immediately without debounce delay\n if (!$input.value.trim()) {\n inputEventFunction()\n return\n }\n searchTimeout = setTimeout(inputEventFunction, 200)\n }\n\n let loadFlag = false\n\n const fixSafariHeight = () => {\n if (window.innerWidth < 768) {\n $searchDialog.style.setProperty('--search-height', window.innerHeight + 'px')\n }\n }\n\n // Debounced resize to avoid layout thrashing\n let resizeTimer\n const onResize = () => {\n clearTimeout(resizeTimer)\n resizeTimer = setTimeout(fixSafariHeight, 150)\n }\n\n const handleEscape = event => {\n if (event.code === 'Escape') {\n closeSearch()\n document.removeEventListener('keydown', handleEscape)\n }\n }\n\n const openSearch = () => {\n btf.overflowPaddingR.add()\n btf.animateIn($searchMask, 'to_show 0.5s')\n btf.animateIn($searchDialog, 'titleScale 0.5s')\n setTimeout(() => { $input.focus() }, 300)\n if (!loadFlag) {\n !localSearch.isfetched && localSearch.fetchData()\n $input.addEventListener('input', debouncedInputEvent)\n loadFlag = true\n }\n // shortcut: ESC\n document.addEventListener('keydown', handleEscape)\n\n fixSafariHeight()\n window.addEventListener('resize', onResize)\n }\n\n const closeSearch = () => {\n btf.overflowPaddingR.remove()\n btf.animateOut($searchDialog, 'search_close .5s')\n btf.animateOut($searchMask, 'to_hide 0.5s')\n document.removeEventListener('keydown', handleEscape)\n window.removeEventListener('resize', onResize)\n }\n\n const searchClickFn = () => {\n btf.addEventListenerPjax(document.querySelector('#search-button > .search'), 'click', openSearch)\n }\n\n const searchFnOnce = () => {\n document.querySelector('#local-search .search-close-button').addEventListener('click', closeSearch)\n $searchMask.addEventListener('click', closeSearch)\n if (GLOBAL_CONFIG.localSearch.preload) {\n localSearch.fetchData()\n }\n localSearch.highlightSearchWords(document.getElementById('article-container'))\n\n // Pagination event delegation - only add if pagination is enabled\n if (enablePagination) {\n $pagination.addEventListener('click', e => {\n e.preventDefault()\n const link = e.target.closest('a[data-page]')\n if (link) {\n const page = parseInt(link.dataset.page, 10)\n if (!isNaN(page) && currentResultItems.length > 0) {\n currentPage = page\n renderResults($input.value.trim().toLowerCase(), currentResultItems)\n }\n }\n })\n }\n\n // Initial state\n toggleResultsVisibility(false)\n }\n\n window.addEventListener('search:loaded', () => {\n const $loadDataItem = document.getElementById('loading-database')\n $loadDataItem.nextElementSibling.style.visibility = 'visible'\n $loadDataItem.remove()\n })\n\n searchClickFn()\n searchFnOnce()\n\n // pjax\n window.addEventListener('pjax:complete', () => {\n !btf.isHidden($searchMask) && closeSearch()\n localSearch.highlightSearchWords(document.getElementById('article-container'))\n searchClickFn()\n })\n})\n"]}