forked from fanruan/fineui
214 lines
6.2 KiB
214 lines
6.2 KiB
7 years ago
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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_RESULTS = 15;
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var MAX_DESCRIPTION_SIZE = 500;
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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 $searchInput;
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var $searchList;
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var $searchTitle;
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var $searchResultsCount;
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var $searchQuery;
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// Throttle search
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function throttle(fn, wait) {
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var timeout;
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return function() {
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var ctx = this, args = arguments;
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if (!timeout) {
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timeout = setTimeout(function() {
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timeout = null;
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fn.apply(ctx, args);
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}, wait);
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}
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};
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}
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function displayResults(res) {
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$bookSearchResults.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(res) {
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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': gitbook.state.basePath + '/' + res.url,
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'text': res.title
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});
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var content = res.body.trim();
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if (content.length > MAX_DESCRIPTION_SIZE) {
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content = content.slice(0, MAX_DESCRIPTION_SIZE).trim()+'...';
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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($searchList);
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});
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}
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function launchSearch(q) {
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// Add class for loading
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$body.addClass('with-search');
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$body.addClass('search-loading');
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// Launch search query
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throttle(gitbook.search.query(q, 0, MAX_RESULTS)
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.then(function(results) {
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displayResults(results);
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})
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.always(function() {
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$body.removeClass('search-loading');
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}), 1000);
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}
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function closeSearch() {
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$body.removeClass('with-search');
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$bookSearchResults.removeClass('open');
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}
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function launchSearchFromQueryString() {
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var q = getParameterByName('q');
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if (q && q.length > 0) {
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// Update search input
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$searchInput.val(q);
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// Launch search
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launchSearch(q);
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}
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}
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function bindSearch() {
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// Bind DOM
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$searchInput = $('#book-search-input input');
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$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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// Launch query based on input content
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function handleUpdate() {
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var q = $searchInput.val();
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if (q.length == 0) {
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closeSearch();
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}
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else {
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launchSearch(q);
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}
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}
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// Detect true content change in search input
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// Workaround for IE < 9
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var propertyChangeUnbound = false;
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$searchInput.on('propertychange', function(e) {
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if (e.originalEvent.propertyName == 'value') {
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handleUpdate();
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}
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});
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// HTML5 (IE9 & others)
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$searchInput.on('input', function(e) {
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// Unbind propertychange event for IE9+
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if (!propertyChangeUnbound) {
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$(this).unbind('propertychange');
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propertyChangeUnbound = true;
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}
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handleUpdate();
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});
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// Push to history on blur
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$searchInput.on('blur', 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({ path: uri }, null, uri);
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}
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});
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}
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gitbook.events.on('page.change', function() {
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bindSearch();
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closeSearch();
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// Launch search based on query parameter
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if (gitbook.search.isInitialized()) {
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launchSearchFromQueryString();
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}
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});
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gitbook.events.on('search.ready', function() {
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bindSearch();
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// Launch search from query param at start
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launchSearchFromQueryString();
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});
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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 + '(=([^&#]*)|&|#|$)', 'i'),
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results = regex.exec(url);
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if (!results) return null;
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if (!results[2]) return '';
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return decodeURIComponent(results[2].replace(/\+/g, ' '));
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}
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function updateQueryString(key, value) {
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value = encodeURIComponent(value);
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var url = window.location.href;
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var re = new RegExp('([?&])' + key + '=.*?(&|#|$)(.*)', '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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}
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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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}
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else
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return url;
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}
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}
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});
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