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bitshift
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A semantic search engine for source code https://bitshift.benkurtovic.com/
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${ item.name }
Create branch ${ searchTerm }
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${ noResults }
bitshift/static/js/index.js

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  1. /*

  2.  * @file Manages all library initialization, jQuery callbacks, query entry

  3.  *      callbacks, server querying, and results diplay for `index.html`.

  4.  */

  5. 

  6. var advancedSearchDiv = $("div#advanced-search");

  7. var advancedSearchButton = $("button#advanced-search");

  8. FINISH_TYPING_INTERVAL = 650;

  9. var searchBar = $("form#search-bar input[type='text']")[0];

  10. var resultsDiv = $("div#results")[0];

  11. 

  12. var typingTimer, scrollTimer, lastValue;

  13. var searchResultsPage = 1;

  14. 

  15. /*

  16.  * Set all page callbacks.

  17.  */

  18. (function setHomePageCallbabacks(){

  19.     var results = $('#results').get(0);

  20. 

  21.     // Enable infinite scrolling down the results page.

  22.     $(window).scroll(function(){

  23.         if($(window).scrollTop() + $(window).height() == $(document).height() &&

  24.                 resultsDiv.querySelectorAll(".result").length > 0)

  25.             loadMoreResults();

  26. 

  27.         clearTimeout(scrollTimer);

  28.         if (!results.classList.contains('disable-hover'))

  29.             results.classList.add('disable-hover')

  30. 

  31.         scrollTimer = setTimeout(function(){

  32.             if (results.classList.contains('disable-hover'))

  33.                 results.classList.remove('disable-hover');

  34.         }, 200);

  35.     });

  36. 

  37.     // Toggle the advanced-search form's visibility.

  38.     advancedSearchButton.click(function(){

  39.         var searchField = $("div#search-field");

  40.         if(!advancedSearchDiv.hasClass("visible")){

  41.             searchField.addClass("partly-visible");

  42.             advancedSearchDiv.fadeIn(500).addClass("visible");

  43.             advancedSearchButton.addClass("clicked");

  44.         }

  45.         else {

  46.             advancedSearchDiv.hide().removeClass("visible");

  47.             advancedSearchButton.removeClass("clicked");

  48.             if($("div#results .result").length == 0)

  49.                 searchField.removeClass("partly-visible");

  50.         }

  51.     });

  52. 

  53.     // Enable capturing the `enter` key.

  54.     $("form#search-bar").submit(function(event){

  55.         event.preventDefault();

  56.         return false;

  57.     });

  58.     searchBar.onkeyup = typingTimer;

  59. }());

  60. 

  61. /*

  62.  * Set keyboard shortcut mappings.

  63.  */

  64. (function resultsHotkeys(){

  65.     /*

  66.      * If the currently viewed result is not the first, scroll to the previous

  67.      * result.

  68.      */

  69.     var previousResult = function(){

  70.         var currResult = $(".display-all");

  71.         if(currResult.length) {

  72.             currResult.removeClass("display-all");

  73.             currResult = currResult.closest(".result").prev(".result");

  74.         } else {

  75.             currResult = $(document.querySelectorAll(".result")[0]);

  76.         }

  77. 

  78.         currResult.addClass("display-all");

  79.         currResult.each(function(){

  80.             $('html,body').stop().animate({

  81.                 scrollTop: $(this).offset().top - (

  82.                     $(window).height() - $(this).outerHeight(true)) / 2

  83.             }, 140);

  84.         });

  85.     };

  86. 

  87.     /*

  88.      * If the currently viewed result is not the last, scroll to the next

  89.      * result.

  90.      */

  91.     var nextResult = function(){

  92.         var currResult = $(".display-all");

  93.         if(currResult.length) {

  94.             currResult.removeClass("display-all");

  95.             currResult = currResult.closest(".result").next(".result");

  96.         } else {

  97.             currResult = $(document.querySelectorAll(".result")[0]);

  98.         }

  99. 

  100.         currResult.addClass('display-all');

  101.         currResult.each(function(){

  102.             $('html,body').stop().animate({

  103.                 scrollTop: $(this).offset().top - (

  104.                     $(window).height() - $(this).outerHeight(true)) / 2

  105.             }, 140);

  106.         });

  107.     };

  108. 

  109.     var displayHotkeyHelp = function(){

  110.         var help = $("div#hotkey-help");

  111.         if(help.hasClass("hidden"))

  112.             help.fadeIn(420);

  113.         else

  114.             help.fadeOut(420);

  115. 

  116.         $("div#body").toggleClass("faded");

  117.         help.toggleClass("hidden");

  118.     }

  119. 

  120.     var hotkeyActions = {

  121.         "k" : previousResult,

  122.         "j" : nextResult,

  123.         "h" : previousSymbolMatch,

  124.         "l" : nextSymbolMatch,

  125.         "?" : displayHotkeyHelp

  126.     };

  127. 

  128.     $(window).keypress(function(key){

  129.         for(var hotkey in hotkeyActions){

  130.             var keyChar = String.fromCharCode(key.keyCode);

  131.             if(keyChar == hotkey &&

  132.                 !($(key.target).is("textarea") || $(key.target).is("input")))

  133.                 hotkeyActions[keyChar]();

  134.         }

  135.     });

  136. }());

  137. 

  138. //Obtained by parsing python file with pygments

  139. var codeExample = '<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre> 1\n 2\n 3\n 4\n 5\n 6\n 7\n 8\n 9\n10\n11\n12\n13\n14\n15\n16\n17\n18\n19\n20\n21\n22\n23\n24\n25\n26\n27\n28\n29\n30\n31\n32\n33\n34\n35\n36\n37\n38\n39\n40</pre></div></td><td class="code"><div class="highlight"><pre><span class="sd">&quot;&quot;&quot;</span>\n<span class="sd">Module to contain all the project&#39;s Flask server plumbing.</span>\n<span class="sd">&quot;&quot;&quot;</span>\n\n<span class="kn">from</span> <span class="nn">flask</span> <span class="kn">import</span> <span class="n">Flask</span>\n<span class="kn">from</span> <span class="nn">flask</span> <span class="kn">import</span> <span class="n">render_template</span><span class="p">,</span> <span class="n">session</span>\n\n<span class="kn">from</span> <span class="nn">bitshift</span> <span class="kn">import</span> <span class="n">assets</span>\n<span class="c"># from bitshift.database import Database</span>\n<span class="c"># from bitshift.query import parse_query</span>\n\n<span class="hll"><span class="n">app</span> <span class="o">=</span> <span class="n">Flask</span><span class="p">(</span><span class="n">__name__</span><span class="p">)</span>\n</span><span class="hll"><span class="n">app</span><span class="o">.</span><span class="n">config</span><span class="o">.</span><span class="n">from_object</span><span class="p">(</span><span class="s">&quot;bitshift.config&quot;</span><span class="p">)</span>\n</span>\n<span class="hll"><span class="n">app_env</span> <span class="o">=</span> <span class="n">app</span><span class="o">.</span><span class="n">jinja_env</span>\n</span><span class="hll"><span class="n">app_env</span><span class="o">.</span><span class="n">line_statement_prefix</span> <span class="o">=</span> <span class="s">&quot;=&quot;</span>\n</span><span class="hll"><span class="n">app_env</span><span class="o">.</span><span class="n">globals</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">assets</span><span class="o">=</span><span class="n">assets</span><span class="p">)</span>\n</span>\n<span class="c"># database = Database()</span>\n\n<span class="hll"><span class="nd">@app.route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">)</span>\n</span><span class="k">def</span> <span class="nf">index</span><span class="p">():</span>\n    <span class="k">return</span> <span class="n">render_template</span><span class="p">(</span><span class="s">&quot;index.html&quot;</span><span class="p">)</span>\n\n<span class="hll"><span class="nd">@app.route</span><span class="p">(</span><span class="s">&quot;/search/&lt;query&gt;&quot;</span><span class="p">)</span>\n</span><span class="k">def</span> <span class="nf">search</span><span class="p">(</span><span class="n">query</span><span class="p">):</span>\n    <span class="c"># tree = parse_query(query)</span>\n    <span class="c"># database.search(tree)</span>\n    <span class="k">pass</span>\n\n<span class="hll"><span class="nd">@app.route</span><span class="p">(</span><span class="s">&quot;/about&quot;</span><span class="p">)</span>\n</span><span class="k">def</span> <span class="nf">about</span><span class="p">():</span>\n    <span class="k">return</span> <span class="n">render_template</span><span class="p">(</span><span class="s">&quot;about.html&quot;</span><span class="p">)</span>\n\n<span class="hll"><span class="nd">@app.route</span><span class="p">(</span><span class="s">&quot;/developers&quot;</span><span class="p">)</span>\n</span><span class="k">def</span> <span class="nf">developers</span><span class="p">():</span>\n    <span class="k">return</span> <span class="n">render_template</span><span class="p">(</span><span class="s">&quot;developers.html&quot;</span><span class="p">)</span>\n\n<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&quot;__main__&quot;</span><span class="p">:</span>\n<span class="hll">    <span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="n">deaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabug</span><span class="o">=</span><span class="bp">True</span><span class="p">)</span>\n</span></pre></div>\n</td></tr></table>'

  140. 

  141. var testCodelet = {

  142.     'url': 'https://github.com/earwig/bitshift/blob/develop/app.py',

  143.     'name': 'app.py',

  144.     'lang': 'python',

  145.     'created': 'May 10, 2014 aaaaaaaaaa',

  146.     'modified': '2 days ago',

  147.     'origin': ['GitHub', 'https://github.com', ''],

  148.     'authors': ['sevko', 'earwig', 'another author', 'a'],

  149.     'code': codeExample

  150. };

  151. 

  152. // Enable infinite scrolling down the results page.

  153. $(window).scroll(function() {

  154.     var searchField = $("div#search-field");

  155.     if($(window).scrollTop() + $(window).height() == $(document).height() &&

  156.         searchField.hasClass('partly-visible')){

  157.         loadMoreResults();

  158.     }

  159. });

  160. 

  161. /*

  162.  * Clear the existing timer and set a new one the the user types text into the

  163.  * search bar.

  164.  */

  165. function typingTimer(event){

  166.     clearTimeout(typingTimer);

  167. 

  168.     var enterKeyCode = 13;

  169.     if(event.keyCode != enterKeyCode){

  170.         if(lastValue != searchBar.value)

  171.             typingTimer = setTimeout(finishedTyping, FINISH_TYPING_INTERVAL);

  172.     }

  173.     else {

  174.         event.preventDefault();

  175.         finishedTyping();

  176.         return false;

  177.     }

  178. };

  179. 

  180. /*

  181.  * Callback which queries the server whenver the user stops typing.

  182.  *

  183.  * Whenever the user doesn't type for a `FINISH_TYPING_INTERVAL` after having

  184.  * entered new text in the search bar, send the current query request to the

  185.  * server.

  186.  */

  187. function finishedTyping(){

  188.     lastValue = searchBar.value;

  189.     var searchField = $("div#search-field");

  190. 

  191.     clearResults();

  192.     if(searchBar.value){

  193.         searchField.addClass("partly-visible");

  194.         populateResults();

  195.     }

  196.     else {

  197.         searchField.removeClass("partly-visible");

  198.         $("div#advanced-search").fadeOut(50);

  199.         advancedSearchButton.removeClass("clicked");

  200.     }

  201. }

  202. 

  203. /*

  204.  * Removes any child elements of `div#results`.

  205.  */

  206. function clearResults(){

  207.     while(resultsDiv.firstChild)

  208.         resultsDiv.removeChild(resultsDiv.firstChild);

  209. }

  210. 

  211. /*

  212.  * Create a result element based upon a codelet instance.

  213.  *

  214.  * @return {Element} The result element.

  215.  */

  216. function createResult(codelet) {

  217.     var maxAttributeLength = 20;

  218. 

  219.     //Level 1

  220.     var newDiv = document.createElement("div"),

  221.         table = document.createElement("table"),

  222.         row = document.createElement("tr");

  223.     //Level 2

  224.     var displayInfo = document.createElement("div"),

  225.         codeElt = document.createElement("td"),

  226.         hiddenInfoContainer = document.createElement("td"),

  227.         hiddenInfo = document.createElement("div"),

  228.         cycle = document.createElement("div");

  229.     //Level 3

  230.     var title = document.createElement("span"),

  231.         site = document.createElement("span"),

  232.         nextMatch = document.createElement("a"),

  233.         prevMatch = document.createElement("a"),

  234.         dateModified = document.createElement("div"),

  235.         language = document.createElement("div"),

  236.         dateCreated = document.createElement("div"),

  237.         authors = document.createElement("div");

  238. 

  239.     //Classes and ID's

  240.     newDiv.classList.add('result');

  241. 

  242.     displayInfo.id = 'display-info';

  243.     codeElt.id = 'code';

  244.     hiddenInfo.id = 'hidden-info';

  245.     cycle.id = 'cycle-matches'

  246. 

  247.     title.id = 'title';

  248.     site.id = 'site';

  249.     nextMatch.id = 'next-match';

  250.     nextMatch.href = '#';

  251.     prevMatch.id = 'prev-match';

  252.     prevMatch.href = '#';

  253.     dateModified.id = 'date-modified';

  254.     language.id = 'language';

  255.     dateCreated.id = 'date-created';

  256.     authors.id = 'authors';

  257. 

  258.     //Add the bulk of the html

  259.     title.innerHTML = ' &raquo; <a href="' + codelet.url + '">'

  260.             + codelet.name + '</a>';

  261.     site.innerHTML = '<a href="' + codelet.origin[1] + '">' +

  262.             codelet.origin[0] +'</a>';

  263.     nextMatch.innerHTML = 'next match';

  264.     prevMatch.innerHTML = 'prev match';

  265.     language.innerHTML = 'Language: <span>' + codelet.lang + '</span>';

  266.     dateModified.innerHTML = 'Last modified: <span>' + codelet.modified +

  267.             '</span>';

  268.     // Needs to be changed from int to string on the server

  269.     dateCreated.innerHTML = 'Created: <span>' +

  270.             codelet.created.substring(0, maxAttributeLength) + '</span>';

  271. 

  272.     var authorsHtml = 'Authors: <span>';

  273.     var currLength = 0;

  274.     var authorsList = [];

  275.     for(var auth = 0; auth < codelet.authors.length; auth++){

  276.         currLength += codelet.authors[auth].length;

  277.         if(maxAttributeLength < currLength){

  278.             authorsList.push("...");

  279.             break;

  280.         }

  281.         else

  282.             authorsList.push('<a href=#>' + codelet.authors[auth] + '</a>');

  283.     }

  284.     authors.innerHTML = "Authors: <span>" + authorsList.join(", ") + "</span>";

  285. 

  286.     // Needs to be processed on the server

  287.     codeElt.innerHTML = '<div id=tablecontainer>' + codelet.code + '</div>';

  288. 

  289.     //Event binding

  290.     $(newDiv).on('mousemove', function(e) {

  291.         var holdCondition = $('.disable-hover');

  292. 

  293.         if(holdCondition.length == 0) {

  294.             $(this).siblings().removeClass('display-all');

  295.             $(this).addClass('display-all');

  296.         }

  297.     });

  298. 

  299.     $(newDiv).on('mouseleave', function(e) {

  300.         var holdCondition = $('.disable-hover');

  301. 

  302.         if(holdCondition.length == 0)

  303.             $(this).removeClass('display-all');

  304.     });

  305. 

  306.     $(nextMatch).click(function(e) {

  307.         e.stopPropagation();

  308.         e.preventDefault();

  309.         nextSymbolMatch();

  310.     });

  311. 

  312.     $(prevMatch).click(function(e) {

  313.         e.stopPropagation();

  314.         e.preventDefault();

  315.         previousSymbolMatch();

  316.     });

  317. 

  318.     //Finish and append elements to parent elements

  319.     hiddenInfo.appendChild(dateCreated);

  320.     hiddenInfo.appendChild(dateModified);

  321.     hiddenInfo.appendChild(language);

  322.     hiddenInfo.appendChild(authors);

  323. 

  324.     hiddenInfoContainer.appendChild(hiddenInfo);

  325. 

  326.     row.appendChild(codeElt);

  327.     row.appendChild(hiddenInfoContainer);

  328.     table.appendChild(row);

  329. 

  330.     displayInfo.appendChild(site);

  331.     displayInfo.appendChild(title);

  332. 

  333.     cycle.appendChild(prevMatch);

  334.     cycle.appendChild(nextMatch);

  335. 

  336.     newDiv.appendChild(displayInfo);

  337.     newDiv.appendChild(table);

  338. 

  339.     return newDiv;

  340. }

  341. 

  342. function previousSymbolMatch() {

  343.     var currResult = $(".display-all"),

  344.         currMatch = currResult.find(".hll.current"),

  345.         matches = currResult.find(".hll"),

  346.         scrollDiv = currResult.find("#tablecontainer");

  347. 

  348.     if (currMatch.length == 0)

  349.         currMatch = matches[0];

  350.     else

  351.         currMatch.removeClass('current');

  352. 

  353.     var index = matches.index(currMatch.get(0)) - 1;

  354.     index = index <= 0 ? matches.length - 1 : index;

  355.     var newMatch = $(matches[index]);

  356. 

  357.     scrollDiv.scrollTop(scrollDiv.scrollTop()

  358.             - scrollDiv.height() / 2

  359.             + newMatch.position().top + newMatch.height() / 2);

  360. 

  361.     newMatch.effect("highlight", {color: '#FFF'}, 750)

  362.     newMatch.addClass('current');

  363. };

  364. 

  365. function nextSymbolMatch() {

  366.     var currResult = $(".display-all"),

  367.         currMatch = currResult.find(".hll.current"),

  368.         matches = currResult.find(".hll"),

  369.         scrollDiv = currResult.find("#tablecontainer");

  370. 

  371.     if (currMatch.length == 0)

  372.         currMatch = $(matches[0]);

  373.     else

  374.         currMatch.removeClass("current");

  375. 

  376.     var index = matches.index(currMatch.get(0)) + 1;

  377.     index = index >= matches.length ? 0 : index;

  378.     var newMatch = $(matches[index]);

  379. 

  380.     scrollDiv.scrollTop(scrollDiv.scrollTop()

  381.             - scrollDiv.height() / 2

  382.             + newMatch.position().top + newMatch.height() / 2);

  383. 

  384.     newMatch.effect("highlight", {color: "#FFF"}, 750)

  385.     newMatch.addClass("current");

  386. };

  387. 

  388. /*

  389.  * AJAX the current query string to the server, and return its response.

  390.  *

  391.  * @return {Array} The server's response in the form of `div.result` DOM

  392.  *      elements, to fill `div#results`.

  393.  */

  394. function queryServer(){

  395.     var queryUrl = document.URL + "search.json?" + $.param({

  396.         "q" : searchBar.value,

  397.         "p" : searchResultsPage++

  398.     });

  399. 

  400.     var results = $.Deferred();

  401.     $.getJSON(queryUrl, function(result){

  402.         var resultDivs = [];

  403.         if("error" in result)

  404.             insertErrorMessage(result["error"]);

  405.         else if(result["results"].length == 0)

  406.             insertErrorMessage("No search results.");

  407.         else

  408.             for(var codelet = 0; codelet < result["results"].length; codelet++)

  409.                 resultDivs.push(createResult(result["results"][codelet]));

  410.         results.resolve(resultDivs);

  411.     });

  412. 

  413.     return results;

  414. }

  415. 

  416. /*

  417.  * Query the server with the current search string, and populate `div#results`

  418.  * with its response.

  419.  */

  420. function populateResults(){

  421.     searchResultsPage = 1;

  422.     loadMoreResults();

  423. }

  424. 

  425. /*

  426.  * Query the server for the next results page, and add its codelets to

  427.  * `div#results`.

  428.  */

  429. function loadMoreResults(){

  430.     queryServer().done(function(results){

  431.         for(var result = 0; result < results.length; result++){

  432.             var newDiv = results[result];

  433.             resultsDiv.appendChild(newDiv);

  434.             setTimeout(

  435.                 (function(divReference){

  436.                     return function(){

  437.                         divReference.classList.add("cascade");

  438.                     };

  439.                 }(newDiv)),

  440.                 result * 20);

  441.         }

  442.     });

  443. }

  444. 

  445. /*

  446.  * Displays a warning message in the UI.

  447.  *

  448.  * @param msg (str) The message string.

  449.  */

  450. function insertErrorMessage(msg){

  451.     var error = $(

  452.             [

  453.                 "<div id='error'><span id='s1'>Error</span> ",

  454.                 "<span id='s2'>&raquo;</span> </div>"

  455.             ].join(""));

  456.     error.append(msg);

  457.     resultsDiv.appendChild(error[0]);

  458. }