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* Minified by jsDelivr using Terser v5.39.0.\n * Original file: /npm/hexo-theme-butterfly@5.5.3/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","/**\r\n * Refer to hexo-generator-searchdb\r\n * https://github.com/next-theme/hexo-generator-searchdb/blob/main/dist/search.js\r\n * Modified by hexo-theme-butterfly\r\n */\r\n\r\nclass LocalSearch {\r\n constructor ({\r\n path = '',\r\n unescape = false,\r\n top_n_per_article = 1\r\n }) {\r\n this.path = path\r\n this.unescape = unescape\r\n this.top_n_per_article = top_n_per_article\r\n this.isfetched = false\r\n this.datas = null\r\n }\r\n\r\n getIndexByWord (words, text, caseSensitive = false) {\r\n const index = []\r\n const included = new Set()\r\n\r\n if (!caseSensitive) {\r\n text = text.toLowerCase()\r\n }\r\n words.forEach(word => {\r\n if (this.unescape) {\r\n const div = document.createElement('div')\r\n div.innerText = word\r\n word = div.innerHTML\r\n }\r\n const wordLen = word.length\r\n if (wordLen === 0) return\r\n let startPosition = 0\r\n let position = -1\r\n if (!caseSensitive) {\r\n word = word.toLowerCase()\r\n }\r\n while ((position = text.indexOf(word, startPosition)) > -1) {\r\n index.push({ position, word })\r\n included.add(word)\r\n startPosition = position + wordLen\r\n }\r\n })\r\n // Sort index by position of keyword\r\n index.sort((left, right) => {\r\n if (left.position !== right.position) {\r\n return left.position - right.position\r\n }\r\n return right.word.length - left.word.length\r\n })\r\n return [index, included]\r\n }\r\n\r\n // Merge hits into slices\r\n mergeIntoSlice (start, end, index) {\r\n let item = index[0]\r\n let { position, word } = item\r\n const hits = []\r\n const count = new Set()\r\n while (position + word.length <= end && index.length !== 0) {\r\n count.add(word)\r\n hits.push({\r\n position,\r\n length: word.length\r\n })\r\n const wordEnd = position + word.length\r\n\r\n // Move to next position of hit\r\n index.shift()\r\n while (index.length !== 0) {\r\n item = index[0]\r\n position = item.position\r\n word = item.word\r\n if (wordEnd > position) {\r\n index.shift()\r\n } else {\r\n break\r\n }\r\n }\r\n }\r\n return {\r\n hits,\r\n start,\r\n end,\r\n count: count.size\r\n }\r\n }\r\n\r\n // Highlight title and content\r\n highlightKeyword (val, slice) {\r\n let result = ''\r\n let index = slice.start\r\n for (const { position, length } of slice.hits) {\r\n result += val.substring(index, position)\r\n index = position + length\r\n result += `${val.substr(position, length)}`\r\n }\r\n result += val.substring(index, slice.end)\r\n return result\r\n }\r\n\r\n getResultItems (keywords) {\r\n const resultItems = []\r\n this.datas.forEach(({ title, content, url }) => {\r\n // The number of different keywords included in the article.\r\n const [indexOfTitle, keysOfTitle] = this.getIndexByWord(keywords, title)\r\n const [indexOfContent, keysOfContent] = this.getIndexByWord(keywords, content)\r\n const includedCount = new Set([...keysOfTitle, ...keysOfContent]).size\r\n\r\n // Show search results\r\n const hitCount = indexOfTitle.length + indexOfContent.length\r\n if (hitCount === 0) return\r\n\r\n const slicesOfTitle = []\r\n if (indexOfTitle.length !== 0) {\r\n slicesOfTitle.push(this.mergeIntoSlice(0, title.length, indexOfTitle))\r\n }\r\n\r\n let slicesOfContent = []\r\n while (indexOfContent.length !== 0) {\r\n const item = indexOfContent[0]\r\n const { position } = item\r\n // Cut out 120 characters. The maxlength of .search-input is 80.\r\n const start = Math.max(0, position - 20)\r\n const end = Math.min(content.length, position + 100)\r\n slicesOfContent.push(this.mergeIntoSlice(start, end, indexOfContent))\r\n }\r\n\r\n // Sort slices in content by included keywords' count and hits' count\r\n slicesOfContent.sort((left, right) => {\r\n if (left.count !== right.count) {\r\n return right.count - left.count\r\n } else if (left.hits.length !== right.hits.length) {\r\n return right.hits.length - left.hits.length\r\n }\r\n return left.start - right.start\r\n })\r\n\r\n // Select top N slices in content\r\n const upperBound = parseInt(this.top_n_per_article, 10)\r\n if (upperBound >= 0) {\r\n slicesOfContent = slicesOfContent.slice(0, upperBound)\r\n }\r\n\r\n let resultItem = ''\r\n\r\n url = new URL(url, location.origin)\r\n url.searchParams.append('highlight', keywords.join(' '))\r\n\r\n if (slicesOfTitle.length !== 0) {\r\n resultItem += `
  • ${this.highlightKeyword(title, slicesOfTitle[0])}`\r\n } else {\r\n resultItem += `
  • ${title}`\r\n }\r\n\r\n slicesOfContent.forEach(slice => {\r\n resultItem += `

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

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