forked from PaganoBarserker/docs
280 lines
8.6 KiB
JavaScript
280 lines
8.6 KiB
JavaScript
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require([
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'gitbook',
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'jquery'
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], function(gitbook, $) {
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var MAX_DESCRIPTION_SIZE = 500;
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var state = gitbook.state;
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var INDEX_DATA = {};
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var usePushState = (typeof history.pushState !== 'undefined');
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// DOM Elements
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var $body = $('body');
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var $bookSearchResults;
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var $searchList;
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var $searchTitle;
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var $searchResultsCount;
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var $searchQuery;
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// Throttle search
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function throttle(fn, wait) {
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var timeout;
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return function() {
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var ctx = this,
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args = arguments;
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if (!timeout) {
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timeout = setTimeout(function() {
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timeout = null;
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fn.apply(ctx, args);
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}, wait);
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}
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};
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}
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function displayResults(res) {
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$bookSearchResults = $('#book-search-results');
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$searchList = $bookSearchResults.find('.search-results-list');
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$searchTitle = $bookSearchResults.find('.search-results-title');
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$searchResultsCount = $searchTitle.find('.search-results-count');
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$searchQuery = $searchTitle.find('.search-query');
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$bookSearchResults.addClass('open');
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var noResults = res.count == 0;
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$bookSearchResults.toggleClass('no-results', noResults);
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// Clear old results
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$searchList.empty();
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// Display title for research
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$searchResultsCount.text(res.count);
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$searchQuery.text(res.query);
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// Create an <li> element for each result
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res.results.forEach(function(item) {
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var $li = $('<li>', {
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'class': 'search-results-item'
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});
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var $title = $('<h3>');
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var $link = $('<a>', {
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'href': item.url + '?h=' + encodeURIComponent(res.query),
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'text': item.title,
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'data-is-search': 1
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});
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if ($link[0].href.split('?')[0] === location.href.split('?')[0]) {
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$link[0].setAttribute('data-need-reload', 1);
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}
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var content = item.body.trim();
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if (content.length > MAX_DESCRIPTION_SIZE) {
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content = content + '...';
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}
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var $content = $('<p>').html(content);
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$link.appendTo($title);
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$title.appendTo($li);
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$content.appendTo($li);
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$li.appendTo($searchList);
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});
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$('.body-inner').scrollTop(0);
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}
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function escapeReg(keyword) {
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//escape regexp prevserve word
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return String(keyword).replace(/([\*\.\?\+\$\^\[\]\(\)\{\}\|\/\\])/g, '\\$1');
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}
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function query(keyword) {
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if (keyword == null || keyword.trim() === '') return;
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var results = [],
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index = -1;
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for (var page in INDEX_DATA) {
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if ((index = INDEX_DATA[page].body.toLowerCase().indexOf(keyword.toLowerCase())) !== -1) {
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results.push({
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url: page,
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title: INDEX_DATA[page].title,
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body: INDEX_DATA[page].body.substr(Math.max(0, index - 50), MAX_DESCRIPTION_SIZE).replace(new RegExp('(' + escapeReg(keyword) + ')', 'gi'), '<span class="search-highlight-keyword">$1</span>')
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});
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}
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}
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displayResults({
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count: results.length,
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query: keyword,
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results: results
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});
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}
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function launchSearch(keyword) {
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// Add class for loading
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$body.addClass('with-search');
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$body.addClass('search-loading');
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function doSearch() {
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query(keyword);
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$body.removeClass('search-loading');
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}
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throttle(doSearch)();
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}
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function closeSearch() {
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$body.removeClass('with-search');
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$('#book-search-results').removeClass('open');
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}
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function bindSearch(target) {
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// Asynchronously load the index data
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{
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var url = state.basePath + "/assets/search_plus_index.json";
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$.getJSON(url).then(function(data) {
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INDEX_DATA = data;
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handleUpdate();
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});
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}
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// Bind DOM
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var $body = $('body');
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// Launch query based on input content
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function handleUpdate() {
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var $searchInput = $(target);
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var keyword = $searchInput.val();
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if (keyword === undefined || keyword.length == 0) {
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closeSearch();
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} else {
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launchSearch(keyword);
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}
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}
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$body.on('keyup', target, function(e) {
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if (e.keyCode === 13) {
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if (usePushState) {
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var uri = updateQueryString('q', $(this).val());
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history.pushState({
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path: uri
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}, null, uri);
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}
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}
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handleUpdate();
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});
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$body.on('click', target, function(e) {
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if (Object.keys(INDEX_DATA).length === 0) {
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var url = state.basePath + "/assets/search_plus_index.json";
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$.getJSON(url).then(function(data) {
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INDEX_DATA = data;
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handleUpdate();
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});
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}
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});
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// Push to history on blur
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$body.on('blur', target, function(e) {
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// Update history state
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if (usePushState) {
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var uri = updateQueryString('q', $(this).val());
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history.pushState({
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path: uri
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}, null, uri);
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}
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});
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}
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gitbook.events.on('start', function() {
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bindSearch('#book-search-input input');
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bindSearch('#book-search-input-inside input');
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showResult();
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closeSearch();
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});
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// 高亮文本
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var highLightPageInner = function(keyword) {
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$('.page-inner').mark(keyword, {
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'ignoreJoiners': true,
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'acrossElements': true,
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'separateWordSearch': false
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});
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setTimeout(function() {
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var mark = $('mark[data-markjs="true"]');
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if (mark.length) {
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mark[0].scrollIntoView();
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}
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}, 100);
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};
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function showResult() {
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var keyword, type;
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if (/\b(q|h)=([^&]+)/.test(location.search)) {
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type = RegExp.$1;
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keyword = decodeURIComponent(RegExp.$2);
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if (type === 'q') {
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launchSearch(keyword);
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} else {
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highLightPageInner(keyword);
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}
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$('#book-search-input input').val(keyword);
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$('#book-search-input-inside input').val(keyword);
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}
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}
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gitbook.events.on('page.change', showResult);
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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 + '(=([^&#]*)|&|#|$)', 'i'),
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results = regex.exec(url);
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if (!results) return null;
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if (!results[2]) return '';
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return decodeURIComponent(results[2].replace(/\+/g, ' '));
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}
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function updateQueryString(key, value) {
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value = encodeURIComponent(value);
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var url = window.location.href.replace(/([?&])(?:q|h)=([^&]+)(&|$)/, function(all, pre, value, end) {
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if (end === '&') {
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return pre;
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}
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return '';
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});
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var re = new RegExp('([?&])' + key + '=.*?(&|#|$)(.*)', 'gi'),
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hash;
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if (re.test(url)) {
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if (typeof value !== 'undefined' && value !== null)
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return url.replace(re, '$1' + key + '=' + value + '$2$3');
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else {
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hash = url.split('#');
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url = hash[0].replace(re, '$1$3').replace(/(&|\?)$/, '');
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if (typeof hash[1] !== 'undefined' && hash[1] !== null)
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url += '#' + hash[1];
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return url;
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}
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} else {
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if (typeof value !== 'undefined' && value !== null) {
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var separator = url.indexOf('?') !== -1 ? '&' : '?';
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hash = url.split('#');
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url = hash[0] + separator + key + '=' + value;
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if (typeof hash[1] !== 'undefined' && hash[1] !== null)
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url += '#' + hash[1];
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return url;
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} else
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return url;
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}
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}
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window.addEventListener('click', function(e) {
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if (e.target.tagName === 'A' && e.target.getAttribute('data-need-reload')) {
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setTimeout(function() {
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location.reload();
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}, 100);
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}
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}, true);
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});
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