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Diffstat (limited to 'book/pt-br/searcher-c2a407aa.js')
| -rw-r--r-- | book/pt-br/searcher-c2a407aa.js | 555 |
1 files changed, 555 insertions, 0 deletions
diff --git a/book/pt-br/searcher-c2a407aa.js b/book/pt-br/searcher-c2a407aa.js new file mode 100644 index 0000000..2a82935 --- /dev/null +++ b/book/pt-br/searcher-c2a407aa.js @@ -0,0 +1,555 @@ +'use strict'; + +/* global Mark, elasticlunr, path_to_root */ + +window.search = window.search || {}; +(function search() { + // Search functionality + // + // You can use !hasFocus() to prevent keyhandling in your key + // event handlers while the user is typing their search. + + if (!Mark || !elasticlunr) { + return; + } + + // eslint-disable-next-line max-len + // IE 11 Compatibility from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith + if (!String.prototype.startsWith) { + String.prototype.startsWith = function(search, pos) { + return this.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search; + }; + } + + const search_wrap = document.getElementById('mdbook-search-wrapper'), + searchbar_outer = document.getElementById('mdbook-searchbar-outer'), + searchbar = document.getElementById('mdbook-searchbar'), + searchresults = document.getElementById('mdbook-searchresults'), + searchresults_outer = document.getElementById('mdbook-searchresults-outer'), + searchresults_header = document.getElementById('mdbook-searchresults-header'), + searchicon = document.getElementById('mdbook-search-toggle'), + content = document.getElementById('mdbook-content'), + + // SVG text elements don't render if inside a <mark> tag. + mark_exclude = ['text'], + marker = new Mark(content), + URL_SEARCH_PARAM = 'search', + URL_MARK_PARAM = 'highlight'; + + let current_searchterm = '', + doc_urls = [], + search_options = { + bool: 'AND', + expand: true, + fields: { + title: {boost: 1}, + body: {boost: 1}, + breadcrumbs: {boost: 0}, + }, + }, + searchindex = null, + results_options = { + teaser_word_count: 30, + limit_results: 30, + }, + teaser_count = 0; + + function hasFocus() { + return searchbar === document.activeElement; + } + + function removeChildren(elem) { + while (elem.firstChild) { + elem.removeChild(elem.firstChild); + } + } + + // Helper to parse a url into its building blocks. + function parseURL(url) { + const a = document.createElement('a'); + a.href = url; + return { + source: url, + protocol: a.protocol.replace(':', ''), + host: a.hostname, + port: a.port, + params: (function() { + const ret = {}; + const seg = a.search.replace(/^\?/, '').split('&'); + for (const part of seg) { + if (!part) { + continue; + } + const s = part.split('='); + ret[s[0]] = s[1]; + } + return ret; + })(), + file: (a.pathname.match(/\/([^/?#]+)$/i) || ['', ''])[1], + hash: a.hash.replace('#', ''), + path: a.pathname.replace(/^([^/])/, '/$1'), + }; + } + + // Helper to recreate a url string from its building blocks. + function renderURL(urlobject) { + let url = urlobject.protocol + '://' + urlobject.host; + if (urlobject.port !== '') { + url += ':' + urlobject.port; + } + url += urlobject.path; + let joiner = '?'; + for (const prop in urlobject.params) { + if (Object.prototype.hasOwnProperty.call(urlobject.params, prop)) { + url += joiner + prop + '=' + urlobject.params[prop]; + joiner = '&'; + } + } + if (urlobject.hash !== '') { + url += '#' + urlobject.hash; + } + return url; + } + + // Helper to escape html special chars for displaying the teasers + const escapeHTML = (function() { + const MAP = { + '&': '&', + '<': '<', + '>': '>', + '"': '"', + '\'': ''', + }; + const repl = function(c) { + return MAP[c]; + }; + return function(s) { + return s.replace(/[&<>'"]/g, repl); + }; + })(); + + function formatSearchMetric(count, searchterm) { + if (count === 1) { + return count + ' search result for \'' + searchterm + '\':'; + } else if (count === 0) { + return 'No search results for \'' + searchterm + '\'.'; + } else { + return count + ' search results for \'' + searchterm + '\':'; + } + } + + function formatSearchResult(result, searchterms) { + const teaser = makeTeaser(escapeHTML(result.doc.body), searchterms); + teaser_count++; + + // The ?URL_MARK_PARAM= parameter belongs inbetween the page and the #heading-anchor + const url = doc_urls[result.ref].split('#'); + if (url.length === 1) { // no anchor found + url.push(''); + } + + // encodeURIComponent escapes all chars that could allow an XSS except + // for '. Due to that we also manually replace ' with its url-encoded + // representation (%27). + const encoded_search = encodeURIComponent(searchterms.join(' ')).replace(/'/g, '%27'); + + return '<a href="' + path_to_root + url[0] + '?' + URL_MARK_PARAM + '=' + encoded_search + + '#' + url[1] + '" aria-details="mdbook-teaser_' + teaser_count + '">' + + result.doc.breadcrumbs + '</a>' + + '<span class="teaser" id="mdbook-teaser_' + teaser_count + + '" aria-label="Search Result Teaser">' + teaser + '</span>'; + } + + function makeTeaser(body, searchterms) { + // The strategy is as follows: + // First, assign a value to each word in the document: + // Words that correspond to search terms (stemmer aware): 40 + // Normal words: 2 + // First word in a sentence: 8 + // Then use a sliding window with a constant number of words and count the + // sum of the values of the words within the window. Then use the window that got the + // maximum sum. If there are multiple maximas, then get the last one. + // Enclose the terms in <em>. + const stemmed_searchterms = searchterms.map(function(w) { + return elasticlunr.stemmer(w.toLowerCase()); + }); + const searchterm_weight = 40; + const weighted = []; // contains elements of ["word", weight, index_in_document] + // split in sentences, then words + const sentences = body.toLowerCase().split('. '); + let index = 0; + let value = 0; + let searchterm_found = false; + for (const sentenceindex in sentences) { + const words = sentences[sentenceindex].split(' '); + value = 8; + for (const wordindex in words) { + const word = words[wordindex]; + if (word.length > 0) { + for (const searchtermindex in stemmed_searchterms) { + if (elasticlunr.stemmer(word).startsWith( + stemmed_searchterms[searchtermindex]) + ) { + value = searchterm_weight; + searchterm_found = true; + } + } + weighted.push([word, value, index]); + value = 2; + } + index += word.length; + index += 1; // ' ' or '.' if last word in sentence + } + index += 1; // because we split at a two-char boundary '. ' + } + + if (weighted.length === 0) { + return body; + } + + const window_weight = []; + const window_size = Math.min(weighted.length, results_options.teaser_word_count); + + let cur_sum = 0; + for (let wordindex = 0; wordindex < window_size; wordindex++) { + cur_sum += weighted[wordindex][1]; + } + window_weight.push(cur_sum); + for (let wordindex = 0; wordindex < weighted.length - window_size; wordindex++) { + cur_sum -= weighted[wordindex][1]; + cur_sum += weighted[wordindex + window_size][1]; + window_weight.push(cur_sum); + } + + let max_sum_window_index = 0; + if (searchterm_found) { + let max_sum = 0; + // backwards + for (let i = window_weight.length - 1; i >= 0; i--) { + if (window_weight[i] > max_sum) { + max_sum = window_weight[i]; + max_sum_window_index = i; + } + } + } else { + max_sum_window_index = 0; + } + + // add <em/> around searchterms + const teaser_split = []; + index = weighted[max_sum_window_index][2]; + for (let i = max_sum_window_index; i < max_sum_window_index + window_size; i++) { + const word = weighted[i]; + if (index < word[2]) { + // missing text from index to start of `word` + teaser_split.push(body.substring(index, word[2])); + index = word[2]; + } + if (word[1] === searchterm_weight) { + teaser_split.push('<em>'); + } + index = word[2] + word[0].length; + teaser_split.push(body.substring(word[2], index)); + if (word[1] === searchterm_weight) { + teaser_split.push('</em>'); + } + } + + return teaser_split.join(''); + } + + function init(config) { + results_options = config.results_options; + search_options = config.search_options; + doc_urls = config.doc_urls; + searchindex = elasticlunr.Index.load(config.index); + + searchbar_outer.classList.remove('searching'); + + searchbar.focus(); + + const searchterm = searchbar.value.trim(); + if (searchterm !== '') { + searchbar.classList.add('active'); + doSearch(searchterm); + } + } + + function initSearchInteractions(config) { + // Set up events + searchicon.addEventListener('click', () => { + searchIconClickHandler(); + }, false); + searchbar.addEventListener('keyup', () => { + searchbarKeyUpHandler(); + }, false); + document.addEventListener('keydown', e => { + globalKeyHandler(e); + }, false); + // If the user uses the browser buttons, do the same as if a reload happened + window.onpopstate = () => { + doSearchOrMarkFromUrl(); + }; + // Suppress "submit" events so the page doesn't reload when the user presses Enter + document.addEventListener('submit', e => { + e.preventDefault(); + }, false); + + // If reloaded, do the search or mark again, depending on the current url parameters + doSearchOrMarkFromUrl(); + + // Exported functions + config.hasFocus = hasFocus; + } + + initSearchInteractions(window.search); + + function unfocusSearchbar() { + // hacky, but just focusing a div only works once + const tmp = document.createElement('input'); + tmp.setAttribute('style', 'position: absolute; opacity: 0;'); + searchicon.appendChild(tmp); + tmp.focus(); + tmp.remove(); + } + + // On reload or browser history backwards/forwards events, parse the url and do search or mark + function doSearchOrMarkFromUrl() { + // Check current URL for search request + const url = parseURL(window.location.href); + if (Object.prototype.hasOwnProperty.call(url.params, URL_SEARCH_PARAM) + && url.params[URL_SEARCH_PARAM] !== '') { + showSearch(true); + searchbar.value = decodeURIComponent( + (url.params[URL_SEARCH_PARAM] + '').replace(/\+/g, '%20')); + searchbarKeyUpHandler(); // -> doSearch() + } else { + showSearch(false); + } + + if (Object.prototype.hasOwnProperty.call(url.params, URL_MARK_PARAM)) { + const words = decodeURIComponent(url.params[URL_MARK_PARAM]).split(' '); + marker.mark(words, { + exclude: mark_exclude, + }); + + const markers = document.querySelectorAll('mark'); + const hide = () => { + for (let i = 0; i < markers.length; i++) { + markers[i].classList.add('fade-out'); + window.setTimeout(() => { + marker.unmark(); + }, 300); + } + }; + + for (let i = 0; i < markers.length; i++) { + markers[i].addEventListener('click', hide); + } + } + } + + // Eventhandler for keyevents on `document` + function globalKeyHandler(e) { + if (e.altKey || + e.ctrlKey || + e.metaKey || + e.shiftKey || + e.target.type === 'textarea' || + e.target.type === 'text' || + !hasFocus() && /^(?:input|select|textarea)$/i.test(e.target.nodeName) + ) { + return; + } + + if (e.key === 'Escape') { + e.preventDefault(); + searchbar.classList.remove('active'); + setSearchUrlParameters('', + searchbar.value.trim() !== '' ? 'push' : 'replace'); + if (hasFocus()) { + unfocusSearchbar(); + } + showSearch(false); + marker.unmark(); + } else if (!hasFocus() && (e.key === 's' || e.key === '/')) { + e.preventDefault(); + showSearch(true); + window.scrollTo(0, 0); + searchbar.select(); + } else if (hasFocus() && (e.key === 'ArrowDown' + || e.key === 'Enter')) { + e.preventDefault(); + const first = searchresults.firstElementChild; + if (first !== null) { + unfocusSearchbar(); + first.classList.add('focus'); + if (e.key === 'Enter') { + window.location.assign(first.querySelector('a')); + } + } + } else if (!hasFocus() && (e.key === 'ArrowDown' + || e.key === 'ArrowUp' + || e.key === 'Enter')) { + // not `:focus` because browser does annoying scrolling + const focused = searchresults.querySelector('li.focus'); + if (!focused) { + return; + } + e.preventDefault(); + if (e.key === 'ArrowDown') { + const next = focused.nextElementSibling; + if (next) { + focused.classList.remove('focus'); + next.classList.add('focus'); + } + } else if (e.key === 'ArrowUp') { + focused.classList.remove('focus'); + const prev = focused.previousElementSibling; + if (prev) { + prev.classList.add('focus'); + } else { + searchbar.select(); + } + } else { // Enter + window.location.assign(focused.querySelector('a')); + } + } + } + + function loadSearchScript(url, id) { + if (document.getElementById(id)) { + return; + } + searchbar_outer.classList.add('searching'); + + const script = document.createElement('script'); + script.src = url; + script.id = id; + script.onload = () => init(window.search); + script.onerror = error => { + console.error(`Failed to load \`${url}\`: ${error}`); + }; + document.head.append(script); + } + + function showSearch(yes) { + if (yes) { + loadSearchScript( + window.path_to_searchindex_js || + path_to_root + 'searchindex-3eaa3696.js', + 'mdbook-search-index'); + search_wrap.classList.remove('hidden'); + searchicon.setAttribute('aria-expanded', 'true'); + } else { + search_wrap.classList.add('hidden'); + searchicon.setAttribute('aria-expanded', 'false'); + const results = searchresults.children; + for (let i = 0; i < results.length; i++) { + results[i].classList.remove('focus'); + } + } + } + + function showResults(yes) { + if (yes) { + searchresults_outer.classList.remove('hidden'); + } else { + searchresults_outer.classList.add('hidden'); + } + } + + // Eventhandler for search icon + function searchIconClickHandler() { + if (search_wrap.classList.contains('hidden')) { + showSearch(true); + window.scrollTo(0, 0); + searchbar.select(); + } else { + showSearch(false); + } + } + + // Eventhandler for keyevents while the searchbar is focused + function searchbarKeyUpHandler() { + const searchterm = searchbar.value.trim(); + if (searchterm !== '') { + searchbar.classList.add('active'); + doSearch(searchterm); + } else { + searchbar.classList.remove('active'); + showResults(false); + removeChildren(searchresults); + } + + setSearchUrlParameters(searchterm, 'push_if_new_search_else_replace'); + + // Remove marks + marker.unmark(); + } + + // Update current url with ?URL_SEARCH_PARAM= parameter, remove ?URL_MARK_PARAM and + // `#heading-anchor`. `action` can be one of "push", "replace", + // "push_if_new_search_else_replace" and replaces or pushes a new browser history item. + // "push_if_new_search_else_replace" pushes if there is no `?URL_SEARCH_PARAM=abc` yet. + function setSearchUrlParameters(searchterm, action) { + const url = parseURL(window.location.href); + const first_search = !Object.prototype.hasOwnProperty.call(url.params, URL_SEARCH_PARAM); + + if (searchterm !== '' || action === 'push_if_new_search_else_replace') { + url.params[URL_SEARCH_PARAM] = searchterm; + delete url.params[URL_MARK_PARAM]; + url.hash = ''; + } else { + delete url.params[URL_MARK_PARAM]; + delete url.params[URL_SEARCH_PARAM]; + } + // A new search will also add a new history item, so the user can go back + // to the page prior to searching. A updated search term will only replace + // the url. + if (action === 'push' || action === 'push_if_new_search_else_replace' && first_search ) { + history.pushState({}, document.title, renderURL(url)); + } else if (action === 'replace' || + action === 'push_if_new_search_else_replace' && + !first_search + ) { + history.replaceState({}, document.title, renderURL(url)); + } + } + + function doSearch(searchterm) { + // Don't search the same twice + if (current_searchterm === searchterm) { + return; + } + searchbar_outer.classList.add('searching'); + if (searchindex === null) { + return; + } + + current_searchterm = searchterm; + + // Do the actual search + const results = searchindex.search(searchterm, search_options); + const resultcount = Math.min(results.length, results_options.limit_results); + + // Display search metrics + searchresults_header.innerText = formatSearchMetric(resultcount, searchterm); + + // Clear and insert results + const searchterms = searchterm.split(' '); + removeChildren(searchresults); + for (let i = 0; i < resultcount ; i++) { + const resultElem = document.createElement('li'); + resultElem.innerHTML = formatSearchResult(results[i], searchterms); + searchresults.appendChild(resultElem); + } + + // Display results + showResults(true); + searchbar_outer.classList.remove('searching'); + } + + // Exported functions + search.hasFocus = hasFocus; +})(window.search); |