src/librustdoc/html/static/main.js

   1 // From rust:
   2 /* global ALIASES, currentCrate, rootPath */
   3
   4 // Local js definitions:
   5 /* global addClass, getCurrentValue, hasClass */
   6 /* global isHidden onEach, removeClass, updateLocalStorage */
   7
   8 if (!String.prototype.startsWith) {
   9     String.prototype.startsWith = function(searchString, position) {
  10         position = position || 0;
  11         return this.indexOf(searchString, position) === position;
  12     };
  13 }
  14 if (!String.prototype.endsWith) {
  15     String.prototype.endsWith = function(suffix, length) {
  16         var l = length || this.length;
  17         return this.indexOf(suffix, l - suffix.length) !== -1;
  18     };
  19 }
  20
  21 if (!DOMTokenList.prototype.add) {
  22     DOMTokenList.prototype.add = function(className) {
  23         if (className && !hasClass(this, className)) {
  24             if (this.className && this.className.length > 0) {
  25                 this.className += " " + className;
  26             } else {
  27                 this.className = className;
  28             }
  29         }
  30     };
  31 }
  32
  33 if (!DOMTokenList.prototype.remove) {
  34     DOMTokenList.prototype.remove = function(className) {
  35         if (className && this.className) {
  36             this.className = (" " + this.className + " ").replace(" " + className + " ", " ")
  37                                                          .trim();
  38         }
  39     };
  40 }
  41
  42 (function() {
  43     "use strict";
  44
  45     // This mapping table should match the discriminants of
  46     // `rustdoc::html::item_type::ItemType` type in Rust.
  47     var itemTypes = ["mod",
  48                      "externcrate",
  49                      "import",
  50                      "struct",
  51                      "enum",
  52                      "fn",
  53                      "type",
  54                      "static",
  55                      "trait",
  56                      "impl",
  57                      "tymethod",
  58                      "method",
  59                      "structfield",
  60                      "variant",
  61                      "macro",
  62                      "primitive",
  63                      "associatedtype",
  64                      "constant",
  65                      "associatedconstant",
  66                      "union",
  67                      "foreigntype",
  68                      "keyword",
  69                      "existential",
  70                      "attr",
  71                      "derive",
  72                      "traitalias"];
  73
  74     var search_input = document.getElementsByClassName("search-input")[0];
  75
  76     // On the search screen, so you remain on the last tab you opened.
  77     //
  78     // 0 for "In Names"
  79     // 1 for "In Parameters"
  80     // 2 for "In Return Types"
  81     var currentTab = 0;
  82
  83     var titleBeforeSearch = document.title;
  84
  85     function getPageId() {
  86         var id = document.location.href.split("#")[1];
  87         if (id) {
  88             return id.split("?")[0].split("&")[0];
  89         }
  90         return null;
  91     }
  92
  93     function showSidebar() {
  94         var elems = document.getElementsByClassName("sidebar-elems")[0];
  95         if (elems) {
  96             addClass(elems, "show-it");
  97         }
  98         var sidebar = document.getElementsByClassName("sidebar")[0];
  99         if (sidebar) {
 100             addClass(sidebar, "mobile");
 101             var filler = document.getElementById("sidebar-filler");
 102             if (!filler) {
 103                 var div = document.createElement("div");
 104                 div.id = "sidebar-filler";
 105                 sidebar.appendChild(div);
 106             }
 107         }
 108         var themePicker = document.getElementsByClassName("theme-picker");
 109         if (themePicker && themePicker.length > 0) {
 110             themePicker[0].style.display = "none";
 111         }
 112     }
 113
 114     function hideSidebar() {
 115         var elems = document.getElementsByClassName("sidebar-elems")[0];
 116         if (elems) {
 117             removeClass(elems, "show-it");
 118         }
 119         var sidebar = document.getElementsByClassName("sidebar")[0];
 120         removeClass(sidebar, "mobile");
 121         var filler = document.getElementById("sidebar-filler");
 122         if (filler) {
 123             filler.remove();
 124         }
 125         document.getElementsByTagName("body")[0].style.marginTop = "";
 126         var themePicker = document.getElementsByClassName("theme-picker");
 127         if (themePicker && themePicker.length > 0) {
 128             themePicker[0].style.display = null;
 129         }
 130     }
 131
 132     // used for special search precedence
 133     var TY_PRIMITIVE = itemTypes.indexOf("primitive");
 134     var TY_KEYWORD = itemTypes.indexOf("keyword");
 135
 136     onEachLazy(document.getElementsByClassName("js-only"), function(e) {
 137         removeClass(e, "js-only");
 138     });
 139
 140     function getQueryStringParams() {
 141         var params = {};
 142         window.location.search.substring(1).split("&").
 143             map(function(s) {
 144                 var pair = s.split("=");
 145                 params[decodeURIComponent(pair[0])] =
 146                     typeof pair[1] === "undefined" ? null : decodeURIComponent(pair[1]);
 147             });
 148         return params;
 149     }
 150
 151     function browserSupportsHistoryApi() {
 152         return window.history && typeof window.history.pushState === "function";
 153     }
 154
 155     var main = document.getElementById("main");
 156
 157     function highlightSourceLines(ev) {
 158         // If we're in mobile mode, we should add the sidebar in any case.
 159         hideSidebar();
 160         var elem;
 161         var search = document.getElementById("search");
 162         var i, from, to, match = window.location.hash.match(/^#?(\d+)(?:-(\d+))?$/);
 163         if (match) {
 164             from = parseInt(match[1], 10);
 165             to = Math.min(50000, parseInt(match[2] || match[1], 10));
 166             from = Math.min(from, to);
 167             elem = document.getElementById(from);
 168             if (!elem) {
 169                 return;
 170             }
 171             if (ev === null) {
 172                 var x = document.getElementById(from);
 173                 if (x) {
 174                     x.scrollIntoView();
 175                 }
 176             }
 177             onEachLazy(document.getElementsByClassName("line-numbers"), function(e) {
 178                 onEachLazy(e.getElementsByTagName("span"), function(i_e) {
 179                     removeClass(i_e, "line-highlighted");
 180                 });
 181             });
 182             for (i = from; i <= to; ++i) {
 183                 addClass(document.getElementById(i), "line-highlighted");
 184             }
 185         } else if (ev !== null && search && !hasClass(search, "hidden") && ev.newURL) {
 186             addClass(search, "hidden");
 187             removeClass(main, "hidden");
 188             var hash = ev.newURL.slice(ev.newURL.indexOf("#") + 1);
 189             if (browserSupportsHistoryApi()) {
 190                 history.replaceState(hash, "", "?search=#" + hash);
 191             }
 192             elem = document.getElementById(hash);
 193             if (elem) {
 194                 elem.scrollIntoView();
 195             }
 196         }
 197     }
 198
 199     function expandSection(id) {
 200         var elem = document.getElementById(id);
 201         if (elem && isHidden(elem)) {
 202             var h3 = elem.parentNode.previousElementSibling;
 203             if (h3 && h3.tagName !== "H3") {
 204                 h3 = h3.previousElementSibling; // skip div.docblock
 205             }
 206
 207             if (h3) {
 208                 var collapses = h3.getElementsByClassName("collapse-toggle");
 209                 if (collapses.length > 0) {
 210                     // The element is not visible, we need to make it appear!
 211                     collapseDocs(collapses[0], "show");
 212                 }
 213             }
 214         }
 215     }
 216
 217     highlightSourceLines(null);
 218     window.onhashchange = highlightSourceLines;
 219
 220     // Gets the human-readable string for the virtual-key code of the
 221     // given KeyboardEvent, ev.
 222     //
 223     // This function is meant as a polyfill for KeyboardEvent#key,
 224     // since it is not supported in Trident.  We also test for
 225     // KeyboardEvent#keyCode because the handleShortcut handler is
 226     // also registered for the keydown event, because Blink doesn't fire
 227     // keypress on hitting the Escape key.
 228     //
 229     // So I guess you could say things are getting pretty interoperable.
 230     function getVirtualKey(ev) {
 231         if ("key" in ev && typeof ev.key != "undefined") {
 232             return ev.key;
 233         }
 234
 235         var c = ev.charCode || ev.keyCode;
 236         if (c == 27) {
 237             return "Escape";
 238         }
 239         return String.fromCharCode(c);
 240     }
 241
 242     function displayHelp(display, ev, help) {
 243         if (display === true) {
 244             if (hasClass(help, "hidden")) {
 245                 ev.preventDefault();
 246                 removeClass(help, "hidden");
 247                 addClass(document.body, "blur");
 248             }
 249         } else if (hasClass(help, "hidden") === false) {
 250             ev.preventDefault();
 251             addClass(help, "hidden");
 252             removeClass(document.body, "blur");
 253         }
 254     }
 255
 256     function handleEscape(ev, help) {
 257         hideModal();
 258         var search = document.getElementById("search");
 259         if (hasClass(help, "hidden") === false) {
 260             displayHelp(false, ev, help);
 261         } else if (hasClass(search, "hidden") === false) {
 262             ev.preventDefault();
 263             addClass(search, "hidden");
 264             removeClass(main, "hidden");
 265             document.title = titleBeforeSearch;
 266         }
 267         defocusSearchBar();
 268     }
 269
 270     function handleShortcut(ev) {
 271         // Don't interfere with browser shortcuts
 272         if (ev.ctrlKey || ev.altKey || ev.metaKey) {
 273             return;
 274         }
 275
 276         var help = document.getElementById("help");
 277         if (document.activeElement.tagName === "INPUT") {
 278             switch (getVirtualKey(ev)) {
 279             case "Escape":
 280                 handleEscape(ev, help);
 281                 break;
 282             }
 283         } else {
 284             switch (getVirtualKey(ev)) {
 285             case "Escape":
 286                 handleEscape(ev, help);
 287                 break;
 288
 289             case "s":
 290             case "S":
 291                 displayHelp(false, ev, help);
 292                 hideModal();
 293                 ev.preventDefault();
 294                 focusSearchBar();
 295                 break;
 296
 297             case "+":
 298             case "-":
 299                 ev.preventDefault();
 300                 toggleAllDocs();
 301                 break;
 302
 303             case "?":
 304                 if (ev.shiftKey) {
 305                     hideModal();
 306                     displayHelp(true, ev, help);
 307                 }
 308                 break;
 309             }
 310         }
 311     }
 312
 313     function findParentElement(elem, tagName) {
 314         do {
 315             if (elem && elem.tagName === tagName) {
 316                 return elem;
 317             }
 318             elem = elem.parentNode;
 319         } while (elem);
 320         return null;
 321     }
 322
 323     document.onkeypress = handleShortcut;
 324     document.onkeydown = handleShortcut;
 325     document.onclick = function(ev) {
 326         if (hasClass(ev.target, "collapse-toggle")) {
 327             collapseDocs(ev.target, "toggle");
 328         } else if (hasClass(ev.target.parentNode, "collapse-toggle")) {
 329             collapseDocs(ev.target.parentNode, "toggle");
 330         } else if (ev.target.tagName === "SPAN" && hasClass(ev.target.parentNode, "line-numbers")) {
 331             var prev_id = 0;
 332
 333             var set_fragment = function(name) {
 334                 if (browserSupportsHistoryApi()) {
 335                     history.replaceState(null, null, "#" + name);
 336                     window.hashchange();
 337                 } else {
 338                     location.replace("#" + name);
 339                 }
 340             };
 341
 342             var cur_id = parseInt(ev.target.id, 10);
 343
 344             if (ev.shiftKey && prev_id) {
 345                 if (prev_id > cur_id) {
 346                     var tmp = prev_id;
 347                     prev_id = cur_id;
 348                     cur_id = tmp;
 349                 }
 350
 351                 set_fragment(prev_id + "-" + cur_id);
 352             } else {
 353                 prev_id = cur_id;
 354
 355                 set_fragment(cur_id);
 356             }
 357         } else if (hasClass(document.getElementById("help"), "hidden") === false) {
 358             addClass(document.getElementById("help"), "hidden");
 359             removeClass(document.body, "blur");
 360         } else {
 361             // Making a collapsed element visible on onhashchange seems
 362             // too late
 363             var a = findParentElement(ev.target, "A");
 364             if (a && a.hash) {
 365                 expandSection(a.hash.replace(/^#/, ""));
 366             }
 367         }
 368     };
 369
 370     var x = document.getElementsByClassName("version-selector");
 371     if (x.length > 0) {
 372         x[0].onchange = function() {
 373             var i, match,
 374                 url = document.location.href,
 375                 stripped = "",
 376                 len = rootPath.match(/\.\.\//g).length + 1;
 377
 378             for (i = 0; i < len; ++i) {
 379                 match = url.match(/\/[^\/]*$/);
 380                 if (i < len - 1) {
 381                     stripped = match[0] + stripped;
 382                 }
 383                 url = url.substring(0, url.length - match[0].length);
 384             }
 385
 386             url += "/" + document.getElementsByClassName("version-selector")[0].value + stripped;
 387
 388             document.location.href = url;
 389         };
 390     }
 391
 392     /**
 393      * A function to compute the Levenshtein distance between two strings
 394      * Licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported
 395      * Full License can be found at http://creativecommons.org/licenses/by-sa/3.0/legalcode
 396      * This code is an unmodified version of the code written by Marco de Wit
 397      * and was found at http://stackoverflow.com/a/18514751/745719
 398      */
 399     var levenshtein_row2 = [];
 400     function levenshtein(s1, s2) {
 401         if (s1 === s2) {
 402             return 0;
 403         }
 404         var s1_len = s1.length, s2_len = s2.length;
 405         if (s1_len && s2_len) {
 406             var i1 = 0, i2 = 0, a, b, c, c2, row = levenshtein_row2;
 407             while (i1 < s1_len) {
 408                 row[i1] = ++i1;
 409             }
 410             while (i2 < s2_len) {
 411                 c2 = s2.charCodeAt(i2);
 412                 a = i2;
 413                 ++i2;
 414                 b = i2;
 415                 for (i1 = 0; i1 < s1_len; ++i1) {
 416                     c = a + (s1.charCodeAt(i1) !== c2 ? 1 : 0);
 417                     a = row[i1];
 418                     b = b < a ? (b < c ? b + 1 : c) : (a < c ? a + 1 : c);
 419                     row[i1] = b;
 420                 }
 421             }
 422             return b;
 423         }
 424         return s1_len + s2_len;
 425     }
 426
 427     function initSearch(rawSearchIndex) {
 428         var currentResults, index, searchIndex;
 429         var MAX_LEV_DISTANCE = 3;
 430         var MAX_RESULTS = 200;
 431         var GENERICS_DATA = 1;
 432         var NAME = 0;
 433         var INPUTS_DATA = 0;
 434         var OUTPUT_DATA = 1;
 435         var params = getQueryStringParams();
 436
 437         // Populate search bar with query string search term when provided,
 438         // but only if the input bar is empty. This avoid the obnoxious issue
 439         // where you start trying to do a search, and the index loads, and
 440         // suddenly your search is gone!
 441         if (search_input.value === "") {
 442             search_input.value = params.search || "";
 443         }
 444
 445         /**
 446          * Executes the query and builds an index of results
 447          * @param  {[Object]} query      [The user query]
 448          * @param  {[type]} searchWords  [The list of search words to query
 449          *                                against]
 450          * @param  {[type]} filterCrates [Crate to search in if defined]
 451          * @return {[type]}              [A search index of results]
 452          */
 453         function execQuery(query, searchWords, filterCrates) {
 454             function itemTypeFromName(typename) {
 455                 var length = itemTypes.length;
 456                 for (var i = 0; i < length; ++i) {
 457                     if (itemTypes[i] === typename) {
 458                         return i;
 459                     }
 460                 }
 461                 return -1;
 462             }
 463
 464             var valLower = query.query.toLowerCase(),
 465                 val = valLower,
 466                 typeFilter = itemTypeFromName(query.type),
 467                 results = {}, results_in_args = {}, results_returned = {},
 468                 split = valLower.split("::");
 469
 470             var length = split.length;
 471             for (var z = 0; z < length; ++z) {
 472                 if (split[z] === "") {
 473                     split.splice(z, 1);
 474                     z -= 1;
 475                 }
 476             }
 477
 478             function transformResults(results, isType) {
 479                 var out = [];
 480                 var length = results.length;
 481                 for (var i = 0; i < length; ++i) {
 482                     if (results[i].id > -1) {
 483                         var obj = searchIndex[results[i].id];
 484                         obj.lev = results[i].lev;
 485                         if (isType !== true || obj.type) {
 486                             var res = buildHrefAndPath(obj);
 487                             obj.displayPath = pathSplitter(res[0]);
 488                             obj.fullPath = obj.displayPath + obj.name;
 489                             // To be sure than it some items aren't considered as duplicate.
 490                             obj.fullPath += "|" + obj.ty;
 491                             obj.href = res[1];
 492                             out.push(obj);
 493                             if (out.length >= MAX_RESULTS) {
 494                                 break;
 495                             }
 496                         }
 497                     }
 498                 }
 499                 return out;
 500             }
 501
 502             function sortResults(results, isType) {
 503                 var ar = [];
 504                 for (var entry in results) {
 505                     if (results.hasOwnProperty(entry)) {
 506                         ar.push(results[entry]);
 507                     }
 508                 }
 509                 results = ar;
 510                 var i;
 511                 var nresults = results.length;
 512                 for (i = 0; i < nresults; ++i) {
 513                     results[i].word = searchWords[results[i].id];
 514                     results[i].item = searchIndex[results[i].id] || {};
 515                 }
 516                 // if there are no results then return to default and fail
 517                 if (results.length === 0) {
 518                     return [];
 519                 }
 520
 521                 results.sort(function(aaa, bbb) {
 522                     var a, b;
 523
 524                     // Sort by non levenshtein results and then levenshtein results by the distance
 525                     // (less changes required to match means higher rankings)
 526                     a = (aaa.lev);
 527                     b = (bbb.lev);
 528                     if (a !== b) { return a - b; }
 529
 530                     // sort by crate (non-current crate goes later)
 531                     a = (aaa.item.crate !== window.currentCrate);
 532                     b = (bbb.item.crate !== window.currentCrate);
 533                     if (a !== b) { return a - b; }
 534
 535                     // sort by exact match (mismatch goes later)
 536                     a = (aaa.word !== valLower);
 537                     b = (bbb.word !== valLower);
 538                     if (a !== b) { return a - b; }
 539
 540                     // sort by item name length (longer goes later)
 541                     a = aaa.word.length;
 542                     b = bbb.word.length;
 543                     if (a !== b) { return a - b; }
 544
 545                     // sort by item name (lexicographically larger goes later)
 546                     a = aaa.word;
 547                     b = bbb.word;
 548                     if (a !== b) { return (a > b ? +1 : -1); }
 549
 550                     // sort by index of keyword in item name (no literal occurrence goes later)
 551                     a = (aaa.index < 0);
 552                     b = (bbb.index < 0);
 553                     if (a !== b) { return a - b; }
 554                     // (later literal occurrence, if any, goes later)
 555                     a = aaa.index;
 556                     b = bbb.index;
 557                     if (a !== b) { return a - b; }
 558
 559                     // special precedence for primitive and keyword pages
 560                     if ((aaa.item.ty === TY_PRIMITIVE && bbb.item.ty !== TY_KEYWORD) ||
 561                         (aaa.item.ty === TY_KEYWORD && bbb.item.ty !== TY_PRIMITIVE)) {
 562                         return -1;
 563                     }
 564                     if ((bbb.item.ty === TY_PRIMITIVE && aaa.item.ty !== TY_PRIMITIVE) ||
 565                         (bbb.item.ty === TY_KEYWORD && aaa.item.ty !== TY_KEYWORD)) {
 566                         return 1;
 567                     }
 568
 569                     // sort by description (no description goes later)
 570                     a = (aaa.item.desc === "");
 571                     b = (bbb.item.desc === "");
 572                     if (a !== b) { return a - b; }
 573
 574                     // sort by type (later occurrence in `itemTypes` goes later)
 575                     a = aaa.item.ty;
 576                     b = bbb.item.ty;
 577                     if (a !== b) { return a - b; }
 578
 579                     // sort by path (lexicographically larger goes later)
 580                     a = aaa.item.path;
 581                     b = bbb.item.path;
 582                     if (a !== b) { return (a > b ? +1 : -1); }
 583
 584                     // que sera, sera
 585                     return 0;
 586                 });
 587
 588                 var length = results.length;
 589                 for (i = 0; i < length; ++i) {
 590                     var result = results[i];
 591
 592                     // this validation does not make sense when searching by types
 593                     if (result.dontValidate) {
 594                         continue;
 595                     }
 596                     var name = result.item.name.toLowerCase(),
 597                         path = result.item.path.toLowerCase(),
 598                         parent = result.item.parent;
 599
 600                     if (isType !== true &&
 601                         validateResult(name, path, split, parent) === false)
 602                     {
 603                         result.id = -1;
 604                     }
 605                 }
 606                 return transformResults(results);
 607             }
 608
 609             function extractGenerics(val) {
 610                 val = val.toLowerCase();
 611                 if (val.indexOf("<") !== -1) {
 612                     var values = val.substring(val.indexOf("<") + 1, val.lastIndexOf(">"));
 613                     return {
 614                         name: val.substring(0, val.indexOf("<")),
 615                         generics: values.split(/\s*,\s*/),
 616                     };
 617                 }
 618                 return {
 619                     name: val,
 620                     generics: [],
 621                 };
 622             }
 623
 624             function checkGenerics(obj, val) {
 625                 // The names match, but we need to be sure that all generics kinda
 626                 // match as well.
 627                 var lev_distance = MAX_LEV_DISTANCE + 1;
 628                 if (val.generics.length > 0) {
 629                     if (obj.length > GENERICS_DATA &&
 630                           obj[GENERICS_DATA].length >= val.generics.length) {
 631                         var elems = obj[GENERICS_DATA].slice(0);
 632                         var total = 0;
 633                         var done = 0;
 634                         // We need to find the type that matches the most to remove it in order
 635                         // to move forward.
 636                         var vlength = val.generics.length;
 637                         for (var y = 0; y < vlength; ++y) {
 638                             var lev = { pos: -1, lev: MAX_LEV_DISTANCE + 1};
 639                             var elength = elems.length;
 640                             for (var x = 0; x < elength; ++x) {
 641                                 var tmp_lev = levenshtein(elems[x], val.generics[y]);
 642                                 if (tmp_lev < lev.lev) {
 643                                     lev.lev = tmp_lev;
 644                                     lev.pos = x;
 645                                 }
 646                             }
 647                             if (lev.pos !== -1) {
 648                                 elems.splice(lev.pos, 1);
 649                                 lev_distance = Math.min(lev.lev, lev_distance);
 650                                 total += lev.lev;
 651                                 done += 1;
 652                             } else {
 653                                 return MAX_LEV_DISTANCE + 1;
 654                             }
 655                         }
 656                         return Math.ceil(total / done);
 657                     }
 658                 }
 659                 return MAX_LEV_DISTANCE + 1;
 660             }
 661
 662             // Check for type name and type generics (if any).
 663             function checkType(obj, val, literalSearch) {
 664                 var lev_distance = MAX_LEV_DISTANCE + 1;
 665                 var x;
 666                 if (obj[NAME] === val.name) {
 667                     if (literalSearch === true) {
 668                         if (val.generics && val.generics.length !== 0) {
 669                             if (obj.length > GENERICS_DATA &&
 670                                   obj[GENERICS_DATA].length >= val.generics.length) {
 671                                 var elems = obj[GENERICS_DATA].slice(0);
 672                                 var allFound = true;
 673
 674                                 for (var y = 0; allFound === true && y < val.generics.length; ++y) {
 675                                     allFound = false;
 676                                     for (x = 0; allFound === false && x < elems.length; ++x) {
 677                                         allFound = elems[x] === val.generics[y];
 678                                     }
 679                                     if (allFound === true) {
 680                                         elems.splice(x - 1, 1);
 681                                     }
 682                                 }
 683                                 if (allFound === true) {
 684                                     return true;
 685                                 }
 686                             } else {
 687                                 return false;
 688                             }
 689                         }
 690                         return true;
 691                     }
 692                     // If the type has generics but don't match, then it won't return at this point.
 693                     // Otherwise, `checkGenerics` will return 0 and it'll return.
 694                     if (obj.length > GENERICS_DATA && obj[GENERICS_DATA].length !== 0) {
 695                         var tmp_lev = checkGenerics(obj, val);
 696                         if (tmp_lev <= MAX_LEV_DISTANCE) {
 697                             return tmp_lev;
 698                         }
 699                     } else {
 700                         return 0;
 701                     }
 702                 }
 703                 // Names didn't match so let's check if one of the generic types could.
 704                 if (literalSearch === true) {
 705                      if (obj.length > GENERICS_DATA && obj[GENERICS_DATA].length > 0) {
 706                         var length = obj[GENERICS_DATA].length;
 707                         for (x = 0; x < length; ++x) {
 708                             if (obj[GENERICS_DATA][x] === val.name) {
 709                                 return true;
 710                             }
 711                         }
 712                     }
 713                     return false;
 714                 }
 715                 lev_distance = Math.min(levenshtein(obj[NAME], val.name), lev_distance);
 716                 if (lev_distance <= MAX_LEV_DISTANCE) {
 717                     lev_distance = Math.min(checkGenerics(obj, val), lev_distance);
 718                 } else if (obj.length > GENERICS_DATA && obj[GENERICS_DATA].length > 0) {
 719                     // We can check if the type we're looking for is inside the generics!
 720                     var olength = obj[GENERICS_DATA].length;
 721                     for (x = 0; x < olength; ++x) {
 722                         lev_distance = Math.min(levenshtein(obj[GENERICS_DATA][x], val.name),
 723                                                 lev_distance);
 724                     }
 725                 }
 726                 // Now whatever happens, the returned distance is "less good" so we should mark it
 727                 // as such, and so we add 1 to the distance to make it "less good".
 728                 return lev_distance + 1;
 729             }
 730
 731             function findArg(obj, val, literalSearch) {
 732                 var lev_distance = MAX_LEV_DISTANCE + 1;
 733
 734                 if (obj && obj.type && obj.type[INPUTS_DATA] &&
 735                       obj.type[INPUTS_DATA].length > 0) {
 736                     var length = obj.type[INPUTS_DATA].length;
 737                     for (var i = 0; i < length; i++) {
 738                         var tmp = checkType(obj.type[INPUTS_DATA][i], val, literalSearch);
 739                         if (literalSearch === true && tmp === true) {
 740                             return true;
 741                         }
 742                         lev_distance = Math.min(tmp, lev_distance);
 743                         if (lev_distance === 0) {
 744                             return 0;
 745                         }
 746                     }
 747                 }
 748                 return literalSearch === true ? false : lev_distance;
 749             }
 750
 751             function checkReturned(obj, val, literalSearch) {
 752                 var lev_distance = MAX_LEV_DISTANCE + 1;
 753
 754                 if (obj && obj.type && obj.type.length > OUTPUT_DATA) {
 755                     var tmp = checkType(obj.type[OUTPUT_DATA], val, literalSearch);
 756                     if (literalSearch === true && tmp === true) {
 757                         return true;
 758                     }
 759                     lev_distance = Math.min(tmp, lev_distance);
 760                     if (lev_distance === 0) {
 761                         return 0;
 762                     }
 763                 }
 764                 return literalSearch === true ? false : lev_distance;
 765             }
 766
 767             function checkPath(contains, lastElem, ty) {
 768                 if (contains.length === 0) {
 769                     return 0;
 770                 }
 771                 var ret_lev = MAX_LEV_DISTANCE + 1;
 772                 var path = ty.path.split("::");
 773
 774                 if (ty.parent && ty.parent.name) {
 775                     path.push(ty.parent.name.toLowerCase());
 776                 }
 777
 778                 var length = path.length;
 779                 var clength = contains.length;
 780                 if (clength > length) {
 781                     return MAX_LEV_DISTANCE + 1;
 782                 }
 783                 for (var i = 0; i < length; ++i) {
 784                     if (i + clength > length) {
 785                         break;
 786                     }
 787                     var lev_total = 0;
 788                     var aborted = false;
 789                     for (var x = 0; x < clength; ++x) {
 790                         var lev = levenshtein(path[i + x], contains[x]);
 791                         if (lev > MAX_LEV_DISTANCE) {
 792                             aborted = true;
 793                             break;
 794                         }
 795                         lev_total += lev;
 796                     }
 797                     if (aborted === false) {
 798                         ret_lev = Math.min(ret_lev, Math.round(lev_total / clength));
 799                     }
 800                 }
 801                 return ret_lev;
 802             }
 803
 804             function typePassesFilter(filter, type) {
 805                 // No filter
 806                 if (filter < 0) return true;
 807
 808                 // Exact match
 809                 if (filter === type) return true;
 810
 811                 // Match related items
 812                 var name = itemTypes[type];
 813                 switch (itemTypes[filter]) {
 814                     case "constant":
 815                         return (name == "associatedconstant");
 816                     case "fn":
 817                         return (name == "method" || name == "tymethod");
 818                     case "type":
 819                         return (name == "primitive" || name == "keyword");
 820                 }
 821
 822                 // No match
 823                 return false;
 824             }
 825
 826             function generateId(ty) {
 827                 if (ty.parent && ty.parent.name) {
 828                     return itemTypes[ty.ty] + ty.path + ty.parent.name + ty.name;
 829                 }
 830                 return itemTypes[ty.ty] + ty.path + ty.name;
 831             }
 832
 833             // quoted values mean literal search
 834             var nSearchWords = searchWords.length;
 835             var i;
 836             var ty;
 837             var fullId;
 838             var returned;
 839             var in_args;
 840             if ((val.charAt(0) === "\"" || val.charAt(0) === "'") &&
 841                 val.charAt(val.length - 1) === val.charAt(0))
 842             {
 843                 val = extractGenerics(val.substr(1, val.length - 2));
 844                 for (i = 0; i < nSearchWords; ++i) {
 845                     if (filterCrates !== undefined && searchIndex[i].crate !== filterCrates) {
 846                         continue;
 847                     }
 848                     in_args = findArg(searchIndex[i], val, true);
 849                     returned = checkReturned(searchIndex[i], val, true);
 850                     ty = searchIndex[i];
 851                     fullId = generateId(ty);
 852
 853                     if (searchWords[i] === val.name) {
 854                         // filter type: ... queries
 855                         if (typePassesFilter(typeFilter, searchIndex[i].ty) &&
 856                             results[fullId] === undefined)
 857                         {
 858                             results[fullId] = {id: i, index: -1};
 859                         }
 860                     } else if ((in_args === true || returned === true) &&
 861                                typePassesFilter(typeFilter, searchIndex[i].ty)) {
 862                         if (in_args === true || returned === true) {
 863                             if (in_args === true) {
 864                                 results_in_args[fullId] = {
 865                                     id: i,
 866                                     index: -1,
 867                                     dontValidate: true,
 868                                 };
 869                             }
 870                             if (returned === true) {
 871                                 results_returned[fullId] = {
 872                                     id: i,
 873                                     index: -1,
 874                                     dontValidate: true,
 875                                 };
 876                             }
 877                         } else {
 878                             results[fullId] = {
 879                                 id: i,
 880                                 index: -1,
 881                                 dontValidate: true,
 882                             };
 883                         }
 884                     }
 885                 }
 886                 query.inputs = [val];
 887                 query.output = val;
 888                 query.search = val;
 889             // searching by type
 890             } else if (val.search("->") > -1) {
 891                 var trimmer = function(s) { return s.trim(); };
 892                 var parts = val.split("->").map(trimmer);
 893                 var input = parts[0];
 894                 // sort inputs so that order does not matter
 895                 var inputs = input.split(",").map(trimmer).sort();
 896                 for (i = 0; i < inputs.length; ++i) {
 897                     inputs[i] = extractGenerics(inputs[i]);
 898                 }
 899                 var output = extractGenerics(parts[1]);
 900
 901                 for (i = 0; i < nSearchWords; ++i) {
 902                     if (filterCrates !== undefined && searchIndex[i].crate !== filterCrates) {
 903                         continue;
 904                     }
 905                     var type = searchIndex[i].type;
 906                     ty = searchIndex[i];
 907                     if (!type) {
 908                         continue;
 909                     }
 910                     fullId = generateId(ty);
 911
 912                     // allow searching for void (no output) functions as well
 913                     var typeOutput = type.length > OUTPUT_DATA ? type[OUTPUT_DATA].name : "";
 914                     returned = checkReturned(ty, output, true);
 915                     if (output.name === "*" || returned === true) {
 916                         in_args = false;
 917                         var module = false;
 918
 919                         if (input === "*") {
 920                             module = true;
 921                         } else {
 922                             var allFound = true;
 923                             for (var it = 0; allFound === true && it < inputs.length; it++) {
 924                                 allFound = checkType(type, inputs[it], true);
 925                             }
 926                             in_args = allFound;
 927                         }
 928                         if (in_args === true) {
 929                             results_in_args[fullId] = {
 930                                 id: i,
 931                                 index: -1,
 932                                 dontValidate: true,
 933                             };
 934                         }
 935                         if (returned === true) {
 936                             results_returned[fullId] = {
 937                                 id: i,
 938                                 index: -1,
 939                                 dontValidate: true,
 940                             };
 941                         }
 942                         if (module === true) {
 943                             results[fullId] = {
 944                                 id: i,
 945                                 index: -1,
 946                                 dontValidate: true,
 947                             };
 948                         }
 949                     }
 950                 }
 951                 query.inputs = inputs.map(function(input) {
 952                     return input.name;
 953                 });
 954                 query.output = output.name;
 955             } else {
 956                 query.inputs = [val];
 957                 query.output = val;
 958                 query.search = val;
 959                 // gather matching search results up to a certain maximum
 960                 val = val.replace(/\_/g, "");
 961
 962                 var valGenerics = extractGenerics(val);
 963
 964                 var paths = valLower.split("::");
 965                 var j;
 966                 for (j = 0; j < paths.length; ++j) {
 967                     if (paths[j] === "") {
 968                         paths.splice(j, 1);
 969                         j -= 1;
 970                     }
 971                 }
 972                 val = paths[paths.length - 1];
 973                 var contains = paths.slice(0, paths.length > 1 ? paths.length - 1 : 1);
 974
 975                 for (j = 0; j < nSearchWords; ++j) {
 976                     var lev;
 977                     var lev_distance;
 978                     ty = searchIndex[j];
 979                     if (!ty || (filterCrates !== undefined && ty.crate !== filterCrates)) {
 980                         continue;
 981                     }
 982                     var lev_distance;
 983                     var lev_add = 0;
 984                     if (paths.length > 1) {
 985                         lev = checkPath(contains, paths[paths.length - 1], ty);
 986                         if (lev > MAX_LEV_DISTANCE) {
 987                             continue;
 988                         } else if (lev > 0) {
 989                             lev_add = 1;
 990                         }
 991                     }
 992
 993                     returned = MAX_LEV_DISTANCE + 1;
 994                     in_args = MAX_LEV_DISTANCE + 1;
 995                     var index = -1;
 996                     // we want lev results to go lower than others
 997                     lev = MAX_LEV_DISTANCE + 1;
 998                     fullId = generateId(ty);
 999
1000                     if (searchWords[j].indexOf(split[i]) > -1 ||
1001                         searchWords[j].indexOf(val) > -1 ||
1002                         searchWords[j].replace(/_/g, "").indexOf(val) > -1)
1003                     {
1004                         // filter type: ... queries
1005                         if (typePassesFilter(typeFilter, ty.ty) && results[fullId] === undefined) {
1006                             index = searchWords[j].replace(/_/g, "").indexOf(val);
1007                         }
1008                     }
1009                     if ((lev = levenshtein(searchWords[j], val)) <= MAX_LEV_DISTANCE) {
1010                         if (typePassesFilter(typeFilter, ty.ty) === false) {
1011                             lev = MAX_LEV_DISTANCE + 1;
1012                         } else {
1013                             lev += 1;
1014                         }
1015                     }
1016                     if ((in_args = findArg(ty, valGenerics)) <= MAX_LEV_DISTANCE) {
1017                         if (typePassesFilter(typeFilter, ty.ty) === false) {
1018                             in_args = MAX_LEV_DISTANCE + 1;
1019                         }
1020                     }
1021                     if ((returned = checkReturned(ty, valGenerics)) <= MAX_LEV_DISTANCE) {
1022                         if (typePassesFilter(typeFilter, ty.ty) === false) {
1023                             returned = MAX_LEV_DISTANCE + 1;
1024                         }
1025                     }
1026
1027                     lev += lev_add;
1028                     if (lev > 0 && val.length > 3 && searchWords[j].indexOf(val) > -1) {
1029                         if (val.length < 6) {
1030                             lev -= 1;
1031                         } else {
1032                             lev = 0;
1033                         }
1034                     }
1035                     if (in_args <= MAX_LEV_DISTANCE) {
1036                         if (results_in_args[fullId] === undefined) {
1037                             results_in_args[fullId] = {
1038                                 id: j,
1039                                 index: index,
1040                                 lev: in_args,
1041                             };
1042                         }
1043                         results_in_args[fullId].lev =
1044                             Math.min(results_in_args[fullId].lev, in_args);
1045                     }
1046                     if (returned <= MAX_LEV_DISTANCE) {
1047                         if (results_returned[fullId] === undefined) {
1048                             results_returned[fullId] = {
1049                                 id: j,
1050                                 index: index,
1051                                 lev: returned,
1052                             };
1053                         }
1054                         results_returned[fullId].lev =
1055                             Math.min(results_returned[fullId].lev, returned);
1056                     }
1057                     if (index !== -1 || lev <= MAX_LEV_DISTANCE) {
1058                         if (index !== -1 && paths.length < 2) {
1059                             lev = 0;
1060                         }
1061                         if (results[fullId] === undefined) {
1062                             results[fullId] = {
1063                                 id: j,
1064                                 index: index,
1065                                 lev: lev,
1066                             };
1067                         }
1068                         results[fullId].lev = Math.min(results[fullId].lev, lev);
1069                     }
1070                 }
1071             }
1072
1073             var ret = {
1074                 "in_args": sortResults(results_in_args, true),
1075                 "returned": sortResults(results_returned, true),
1076                 "others": sortResults(results),
1077             };
1078             if (ALIASES && ALIASES[window.currentCrate] &&
1079                     ALIASES[window.currentCrate][query.raw]) {
1080                 var aliases = ALIASES[window.currentCrate][query.raw];
1081                 for (i = 0; i < aliases.length; ++i) {
1082                     aliases[i].is_alias = true;
1083                     aliases[i].alias = query.raw;
1084                     aliases[i].path = aliases[i].p;
1085                     var res = buildHrefAndPath(aliases[i]);
1086                     aliases[i].displayPath = pathSplitter(res[0]);
1087                     aliases[i].fullPath = aliases[i].displayPath + aliases[i].name;
1088                     aliases[i].href = res[1];
1089                     ret.others.unshift(aliases[i]);
1090                     if (ret.others.length > MAX_RESULTS) {
1091                         ret.others.pop();
1092                     }
1093                 }
1094             }
1095             return ret;
1096         }
1097
1098         /**
1099          * Validate performs the following boolean logic. For example:
1100          * "File::open" will give IF A PARENT EXISTS => ("file" && "open")
1101          * exists in (name || path || parent) OR => ("file" && "open") exists in
1102          * (name || path )
1103          *
1104          * This could be written functionally, but I wanted to minimise
1105          * functions on stack.
1106          *
1107          * @param  {[string]} name   [The name of the result]
1108          * @param  {[string]} path   [The path of the result]
1109          * @param  {[string]} keys   [The keys to be used (["file", "open"])]
1110          * @param  {[object]} parent [The parent of the result]
1111          * @return {[boolean]}       [Whether the result is valid or not]
1112          */
1113         function validateResult(name, path, keys, parent) {
1114             for (var i = 0; i < keys.length; ++i) {
1115                 // each check is for validation so we negate the conditions and invalidate
1116                 if (!(
1117                     // check for an exact name match
1118                     name.indexOf(keys[i]) > -1 ||
1119                     // then an exact path match
1120                     path.indexOf(keys[i]) > -1 ||
1121                     // next if there is a parent, check for exact parent match
1122                     (parent !== undefined &&
1123                         parent.name.toLowerCase().indexOf(keys[i]) > -1) ||
1124                     // lastly check to see if the name was a levenshtein match
1125                     levenshtein(name, keys[i]) <= MAX_LEV_DISTANCE)) {
1126                     return false;
1127                 }
1128             }
1129             return true;
1130         }
1131
1132         function getQuery(raw) {
1133             var matches, type, query;
1134             query = raw;
1135
1136             matches = query.match(/^(fn|mod|struct|enum|trait|type|const|macro)\s*:\s*/i);
1137             if (matches) {
1138                 type = matches[1].replace(/^const$/, "constant");
1139                 query = query.substring(matches[0].length);
1140             }
1141
1142             return {
1143                 raw: raw,
1144                 query: query,
1145                 type: type,
1146                 id: query + type
1147             };
1148         }
1149
1150         function initSearchNav() {
1151             var hoverTimeout;
1152
1153             var click_func = function(e) {
1154                 var el = e.target;
1155                 // to retrieve the real "owner" of the event.
1156                 while (el.tagName !== "TR") {
1157                     el = el.parentNode;
1158                 }
1159                 var dst = e.target.getElementsByTagName("a");
1160                 if (dst.length < 1) {
1161                     return;
1162                 }
1163                 dst = dst[0];
1164                 if (window.location.pathname === dst.pathname) {
1165                     addClass(document.getElementById("search"), "hidden");
1166                     removeClass(main, "hidden");
1167                     document.location.href = dst.href;
1168                 }
1169             };
1170             var mouseover_func = function(e) {
1171                 var el = e.target;
1172                 // to retrieve the real "owner" of the event.
1173                 while (el.tagName !== "TR") {
1174                     el = el.parentNode;
1175                 }
1176                 clearTimeout(hoverTimeout);
1177                 hoverTimeout = setTimeout(function() {
1178                     onEachLazy(document.getElementsByClassName("search-results"), function(e) {
1179                         onEachLazy(e.getElementsByClassName("result"), function(i_e) {
1180                             removeClass(i_e, "highlighted");
1181                         });
1182                     });
1183                     addClass(el, "highlighted");
1184                 }, 20);
1185             };
1186             onEachLazy(document.getElementsByClassName("search-results"), function(e) {
1187                 onEachLazy(e.getElementsByClassName("result"), function(i_e) {
1188                     i_e.onclick = click_func;
1189                     i_e.onmouseover = mouseover_func;
1190                 });
1191             });
1192
1193             search_input.onkeydown = function(e) {
1194                 // "actives" references the currently highlighted item in each search tab.
1195                 // Each array in "actives" represents a tab.
1196                 var actives = [[], [], []];
1197                 // "current" is used to know which tab we're looking into.
1198                 var current = 0;
1199                 onEachLazy(document.getElementsByClassName("search-results"), function(e) {
1200                     onEachLazy(e.getElementsByClassName("highlighted"), function(e) {
1201                         actives[current].push(e);
1202                     });
1203                     current += 1;
1204                 });
1205
1206                 if (e.which === 38) { // up
1207                     if (!actives[currentTab].length ||
1208                         !actives[currentTab][0].previousElementSibling) {
1209                         return;
1210                     }
1211
1212                     addClass(actives[currentTab][0].previousElementSibling, "highlighted");
1213                     removeClass(actives[currentTab][0], "highlighted");
1214                 } else if (e.which === 40) { // down
1215                     if (!actives[currentTab].length) {
1216                         var results = document.getElementsByClassName("search-results");
1217                         if (results.length > 0) {
1218                             var res = results[currentTab].getElementsByClassName("result");
1219                             if (res.length > 0) {
1220                                 addClass(res[0], "highlighted");
1221                             }
1222                         }
1223                     } else if (actives[currentTab][0].nextElementSibling) {
1224                         addClass(actives[currentTab][0].nextElementSibling, "highlighted");
1225                         removeClass(actives[currentTab][0], "highlighted");
1226                     }
1227                 } else if (e.which === 13) { // return
1228                     if (actives[currentTab].length) {
1229                         document.location.href =
1230                             actives[currentTab][0].getElementsByTagName("a")[0].href;
1231                     }
1232                 } else if (e.which === 9) { // tab
1233                     if (e.shiftKey) {
1234                         printTab(currentTab > 0 ? currentTab - 1 : 2);
1235                     } else {
1236                         printTab(currentTab > 1 ? 0 : currentTab + 1);
1237                     }
1238                     e.preventDefault();
1239                 } else if (e.which === 16) { // shift
1240                     // Does nothing, it's just to avoid losing "focus" on the highlighted element.
1241                 } else if (e.which === 27) { // escape
1242                     removeClass(actives[currentTab][0], "highlighted");
1243                     search_input.value = "";
1244                     defocusSearchBar();
1245                 } else if (actives[currentTab].length > 0) {
1246                     removeClass(actives[currentTab][0], "highlighted");
1247                 }
1248             };
1249         }
1250
1251         function buildHrefAndPath(item) {
1252             var displayPath;
1253             var href;
1254             var type = itemTypes[item.ty];
1255             var name = item.name;
1256
1257             if (type === "mod") {
1258                 displayPath = item.path + "::";
1259                 href = rootPath + item.path.replace(/::/g, "/") + "/" +
1260                        name + "/index.html";
1261             } else if (type === "primitive" || type === "keyword") {
1262                 displayPath = "";
1263                 href = rootPath + item.path.replace(/::/g, "/") +
1264                        "/" + type + "." + name + ".html";
1265             } else if (type === "externcrate") {
1266                 displayPath = "";
1267                 href = rootPath + name + "/index.html";
1268             } else if (item.parent !== undefined) {
1269                 var myparent = item.parent;
1270                 var anchor = "#" + type + "." + name;
1271                 var parentType = itemTypes[myparent.ty];
1272                 if (parentType === "primitive") {
1273                     displayPath = myparent.name + "::";
1274                 } else {
1275                     displayPath = item.path + "::" + myparent.name + "::";
1276                 }
1277                 href = rootPath + item.path.replace(/::/g, "/") +
1278                        "/" + parentType +
1279                        "." + myparent.name +
1280                        ".html" + anchor;
1281             } else {
1282                 displayPath = item.path + "::";
1283                 href = rootPath + item.path.replace(/::/g, "/") +
1284                        "/" + type + "." + name + ".html";
1285             }
1286             return [displayPath, href];
1287         }
1288
1289         function escape(content) {
1290             var h1 = document.createElement("h1");
1291             h1.textContent = content;
1292             return h1.innerHTML;
1293         }
1294
1295         function pathSplitter(path) {
1296             var tmp = "<span>" + path.replace(/::/g, "::</span><span>");
1297             if (tmp.endsWith("<span>")) {
1298                 return tmp.slice(0, tmp.length - 6);
1299             }
1300             return tmp;
1301         }
1302
1303         function addTab(array, query, display) {
1304             var extraStyle = "";
1305             if (display === false) {
1306                 extraStyle = " style=\"display: none;\"";
1307             }
1308
1309             var output = "";
1310             var duplicates = {};
1311             var length = 0;
1312             if (array.length > 0) {
1313                 output = "<table class=\"search-results\"" + extraStyle + ">";
1314
1315                 array.forEach(function(item) {
1316                     var name, type;
1317
1318                     name = item.name;
1319                     type = itemTypes[item.ty];
1320
1321                     if (item.is_alias !== true) {
1322                         if (duplicates[item.fullPath]) {
1323                             return;
1324                         }
1325                         duplicates[item.fullPath] = true;
1326                     }
1327                     length += 1;
1328
1329                     output += "<tr class=\"" + type + " result\"><td>" +
1330                               "<a href=\"" + item.href + "\">" +
1331                               (item.is_alias === true ?
1332                                ("<span class=\"alias\"><b>" + item.alias + " </b></span><span " +
1333                                   "class=\"grey\"><i>&nbsp;- see&nbsp;</i></span>") : "") +
1334                               item.displayPath + "<span class=\"" + type + "\">" +
1335                               name + "</span></a></td><td>" +
1336                               "<a href=\"" + item.href + "\">" +
1337                               "<span class=\"desc\">" + escape(item.desc) +
1338                               "&nbsp;</span></a></td></tr>";
1339                 });
1340                 output += "</table>";
1341             } else {
1342                 output = "<div class=\"search-failed\"" + extraStyle + ">No results :(<br/>" +
1343                     "Try on <a href=\"https://duckduckgo.com/?q=" +
1344                     encodeURIComponent("rust " + query.query) +
1345                     "\">DuckDuckGo</a>?<br/><br/>" +
1346                     "Or try looking in one of these:<ul><li>The <a " +
1347                     "href=\"https://doc.rust-lang.org/reference/index.html\">Rust Reference</a> " +
1348                     " for technical details about the language.</li><li><a " +
1349                     "href=\"https://doc.rust-lang.org/rust-by-example/index.html\">Rust By " +
1350                     "Example</a> for expository code examples.</a></li><li>The <a " +
1351                     "href=\"https://doc.rust-lang.org/book/index.html\">Rust Book</a> for " +
1352                     "introductions to language features and the language itself.</li><li><a " +
1353                     "href=\"https://docs.rs\">Docs.rs</a> for documentation of crates released on" +
1354                     " <a href=\"https://crates.io/\">crates.io</a>.</li></ul></div>";
1355             }
1356             return [output, length];
1357         }
1358
1359         function makeTabHeader(tabNb, text, nbElems) {
1360             if (currentTab === tabNb) {
1361                 return "<div class=\"selected\">" + text +
1362                        " <div class=\"count\">(" + nbElems + ")</div></div>";
1363             }
1364             return "<div>" + text + " <div class=\"count\">(" + nbElems + ")</div></div>";
1365         }
1366
1367         function showResults(results) {
1368             if (results.others.length === 1 &&
1369                 getCurrentValue("rustdoc-go-to-only-result") === "true") {
1370                 var elem = document.createElement("a");
1371                 elem.href = results.others[0].href;
1372                 elem.style.display = "none";
1373                 // For firefox, we need the element to be in the DOM so it can be clicked.
1374                 document.body.appendChild(elem);
1375                 elem.click();
1376             }
1377             var query = getQuery(search_input.value);
1378
1379             currentResults = query.id;
1380
1381             var ret_others = addTab(results.others, query);
1382             var ret_in_args = addTab(results.in_args, query, false);
1383             var ret_returned = addTab(results.returned, query, false);
1384
1385             var output = "<h1>Results for " + escape(query.query) +
1386                 (query.type ? " (type: " + escape(query.type) + ")" : "") + "</h1>" +
1387                 "<div id=\"titles\">" +
1388                 makeTabHeader(0, "In Names", ret_others[1]) +
1389                 makeTabHeader(1, "In Parameters", ret_in_args[1]) +
1390                 makeTabHeader(2, "In Return Types", ret_returned[1]) +
1391                 "</div><div id=\"results\">" +
1392                 ret_others[0] + ret_in_args[0] + ret_returned[0] + "</div>";
1393
1394             addClass(main, "hidden");
1395             var search = document.getElementById("search");
1396             removeClass(search, "hidden");
1397             search.innerHTML = output;
1398             var tds = search.getElementsByTagName("td");
1399             var td_width = 0;
1400             if (tds.length > 0) {
1401                 td_width = tds[0].offsetWidth;
1402             }
1403             var width = search.offsetWidth - 40 - td_width;
1404             onEachLazy(search.getElementsByClassName("desc"), function(e) {
1405                 e.style.width = width + "px";
1406             });
1407             initSearchNav();
1408             var elems = document.getElementById("titles").childNodes;
1409             elems[0].onclick = function() { printTab(0); };
1410             elems[1].onclick = function() { printTab(1); };
1411             elems[2].onclick = function() { printTab(2); };
1412             printTab(currentTab);
1413         }
1414
1415         function execSearch(query, searchWords, filterCrates) {
1416             function getSmallest(arrays, positions, notDuplicates) {
1417                 var start = null;
1418
1419                 for (var it = 0; it < positions.length; ++it) {
1420                     if (arrays[it].length > positions[it] &&
1421                         (start === null || start > arrays[it][positions[it]].lev) &&
1422                         !notDuplicates[arrays[it][positions[it]].fullPath]) {
1423                         start = arrays[it][positions[it]].lev;
1424                     }
1425                 }
1426                 return start;
1427             }
1428
1429             function mergeArrays(arrays) {
1430                 var ret = [];
1431                 var positions = [];
1432                 var notDuplicates = {};
1433
1434                 for (var x = 0; x < arrays.length; ++x) {
1435                     positions.push(0);
1436                 }
1437                 while (ret.length < MAX_RESULTS) {
1438                     var smallest = getSmallest(arrays, positions, notDuplicates);
1439
1440                     if (smallest === null) {
1441                         break;
1442                     }
1443                     for (x = 0; x < arrays.length && ret.length < MAX_RESULTS; ++x) {
1444                         if (arrays[x].length > positions[x] &&
1445                                 arrays[x][positions[x]].lev === smallest &&
1446                                 !notDuplicates[arrays[x][positions[x]].fullPath]) {
1447                             ret.push(arrays[x][positions[x]]);
1448                             notDuplicates[arrays[x][positions[x]].fullPath] = true;
1449                             positions[x] += 1;
1450                         }
1451                     }
1452                 }
1453                 return ret;
1454             }
1455
1456             var queries = query.raw.split(",");
1457             var results = {
1458                 "in_args": [],
1459                 "returned": [],
1460                 "others": [],
1461             };
1462
1463             for (var i = 0; i < queries.length; ++i) {
1464                 query = queries[i].trim();
1465                 if (query.length !== 0) {
1466                     var tmp = execQuery(getQuery(query), searchWords, filterCrates);
1467
1468                     results.in_args.push(tmp.in_args);
1469                     results.returned.push(tmp.returned);
1470                     results.others.push(tmp.others);
1471                 }
1472             }
1473             if (queries.length > 1) {
1474                 return {
1475                     "in_args": mergeArrays(results.in_args),
1476                     "returned": mergeArrays(results.returned),
1477                     "others": mergeArrays(results.others),
1478                 };
1479             } else {
1480                 return {
1481                     "in_args": results.in_args[0],
1482                     "returned": results.returned[0],
1483                     "others": results.others[0],
1484                 };
1485             }
1486         }
1487
1488         function getFilterCrates() {
1489             var elem = document.getElementById("crate-search");
1490
1491             if (elem && elem.value !== "All crates" && rawSearchIndex.hasOwnProperty(elem.value)) {
1492                 return elem.value;
1493             }
1494             return undefined;
1495         }
1496
1497         function search(e, forced) {
1498             var params = getQueryStringParams();
1499             var query = getQuery(search_input.value.trim());
1500
1501             if (e) {
1502                 e.preventDefault();
1503             }
1504
1505             if (query.query.length === 0) {
1506                 return;
1507             }
1508             if (forced !== true && query.id === currentResults) {
1509                 if (query.query.length > 0) {
1510                     putBackSearch(search_input);
1511                 }
1512                 return;
1513             }
1514
1515             // Update document title to maintain a meaningful browser history
1516             document.title = "Results for " + query.query + " - Rust";
1517
1518             // Because searching is incremental by character, only the most
1519             // recent search query is added to the browser history.
1520             if (browserSupportsHistoryApi()) {
1521                 if (!history.state && !params.search) {
1522                     history.pushState(query, "", "?search=" + encodeURIComponent(query.raw));
1523                 } else {
1524                     history.replaceState(query, "", "?search=" + encodeURIComponent(query.raw));
1525                 }
1526             }
1527
1528             var filterCrates = getFilterCrates();
1529             showResults(execSearch(query, index, filterCrates), filterCrates);
1530         }
1531
1532         function buildIndex(rawSearchIndex) {
1533             searchIndex = [];
1534             var searchWords = [];
1535             var i;
1536
1537             for (var crate in rawSearchIndex) {
1538                 if (!rawSearchIndex.hasOwnProperty(crate)) { continue; }
1539
1540                 searchWords.push(crate);
1541                 searchIndex.push({
1542                     crate: crate,
1543                     ty: 1, // == ExternCrate
1544                     name: crate,
1545                     path: "",
1546                     desc: rawSearchIndex[crate].doc,
1547                     type: null,
1548                 });
1549
1550                 // an array of [(Number) item type,
1551                 //              (String) name,
1552                 //              (String) full path or empty string for previous path,
1553                 //              (String) description,
1554                 //              (Number | null) the parent path index to `paths`]
1555                 //              (Object | null) the type of the function (if any)
1556                 var items = rawSearchIndex[crate].i;
1557                 // an array of [(Number) item type,
1558                 //              (String) name]
1559                 var paths = rawSearchIndex[crate].p;
1560
1561                 // convert `paths` into an object form
1562                 var len = paths.length;
1563                 for (i = 0; i < len; ++i) {
1564                     paths[i] = {ty: paths[i][0], name: paths[i][1]};
1565                 }
1566
1567                 // convert `items` into an object form, and construct word indices.
1568                 //
1569                 // before any analysis is performed lets gather the search terms to
1570                 // search against apart from the rest of the data.  This is a quick
1571                 // operation that is cached for the life of the page state so that
1572                 // all other search operations have access to this cached data for
1573                 // faster analysis operations
1574                 len = items.length;
1575                 var lastPath = "";
1576                 for (i = 0; i < len; ++i) {
1577                     var rawRow = items[i];
1578                     var row = {crate: crate, ty: rawRow[0], name: rawRow[1],
1579                                path: rawRow[2] || lastPath, desc: rawRow[3],
1580                                parent: paths[rawRow[4]], type: rawRow[5]};
1581                     searchIndex.push(row);
1582                     if (typeof row.name === "string") {
1583                         var word = row.name.toLowerCase();
1584                         searchWords.push(word);
1585                     } else {
1586                         searchWords.push("");
1587                     }
1588                     lastPath = row.path;
1589                 }
1590             }
1591             return searchWords;
1592         }
1593
1594         function startSearch() {
1595             var searchTimeout;
1596             var callback = function() {
1597                 clearTimeout(searchTimeout);
1598                 if (search_input.value.length === 0) {
1599                     if (browserSupportsHistoryApi()) {
1600                         history.replaceState("", "std - Rust", "?search=");
1601                     }
1602                     if (hasClass(main, "content")) {
1603                         removeClass(main, "hidden");
1604                     }
1605                     var search_c = document.getElementById("search");
1606                     if (hasClass(search_c, "content")) {
1607                         addClass(search_c, "hidden");
1608                     }
1609                 } else {
1610                     searchTimeout = setTimeout(search, 500);
1611                 }
1612             };
1613             search_input.onkeyup = callback;
1614             search_input.oninput = callback;
1615             document.getElementsByClassName("search-form")[0].onsubmit = function(e) {
1616                 e.preventDefault();
1617                 clearTimeout(searchTimeout);
1618                 search();
1619             };
1620             search_input.onchange = function(e) {
1621                 // Do NOT e.preventDefault() here. It will prevent pasting.
1622                 clearTimeout(searchTimeout);
1623                 // zero-timeout necessary here because at the time of event handler execution the
1624                 // pasted content is not in the input field yet. Shouldn’t make any difference for
1625                 // change, though.
1626                 setTimeout(search, 0);
1627             };
1628             search_input.onpaste = search_input.onchange;
1629
1630             var selectCrate = document.getElementById('crate-search');
1631             if (selectCrate) {
1632                 selectCrate.onchange = function() {
1633                     search(undefined, true);
1634                 };
1635             }
1636
1637             // Push and pop states are used to add search results to the browser
1638             // history.
1639             if (browserSupportsHistoryApi()) {
1640                 // Store the previous <title> so we can revert back to it later.
1641                 var previousTitle = document.title;
1642
1643                 window.onpopstate = function(e) {
1644                     var params = getQueryStringParams();
1645                     // When browsing back from search results the main page
1646                     // visibility must be reset.
1647                     if (!params.search) {
1648                         if (hasClass(main, "content")) {
1649                             removeClass(main, "hidden");
1650                         }
1651                         var search_c = document.getElementById("search");
1652                         if (hasClass(search_c, "content")) {
1653                             addClass(search_c, "hidden");
1654                         }
1655                     }
1656                     // Revert to the previous title manually since the History
1657                     // API ignores the title parameter.
1658                     document.title = previousTitle;
1659                     // When browsing forward to search results the previous
1660                     // search will be repeated, so the currentResults are
1661                     // cleared to ensure the search is successful.
1662                     currentResults = null;
1663                     // Synchronize search bar with query string state and
1664                     // perform the search. This will empty the bar if there's
1665                     // nothing there, which lets you really go back to a
1666                     // previous state with nothing in the bar.
1667                     if (params.search) {
1668                         search_input.value = params.search;
1669                     } else {
1670                         search_input.value = "";
1671                     }
1672                     // Some browsers fire "onpopstate" for every page load
1673                     // (Chrome), while others fire the event only when actually
1674                     // popping a state (Firefox), which is why search() is
1675                     // called both here and at the end of the startSearch()
1676                     // function.
1677                     search();
1678                 };
1679             }
1680             search();
1681         }
1682
1683         index = buildIndex(rawSearchIndex);
1684         startSearch();
1685
1686         // Draw a convenient sidebar of known crates if we have a listing
1687         if (rootPath === "../" || rootPath === "./") {
1688             var sidebar = document.getElementsByClassName("sidebar-elems")[0];
1689             if (sidebar) {
1690                 var div = document.createElement("div");
1691                 div.className = "block crate";
1692                 div.innerHTML = "<h3>Crates</h3>";
1693                 var ul = document.createElement("ul");
1694                 div.appendChild(ul);
1695
1696                 var crates = [];
1697                 for (var crate in rawSearchIndex) {
1698                     if (!rawSearchIndex.hasOwnProperty(crate)) {
1699                         continue;
1700                     }
1701                     crates.push(crate);
1702                 }
1703                 crates.sort();
1704                 for (var i = 0; i < crates.length; ++i) {
1705                     var klass = "crate";
1706                     if (rootPath !== "./" && crates[i] === window.currentCrate) {
1707                         klass += " current";
1708                     }
1709                     var link = document.createElement("a");
1710                     link.href = rootPath + crates[i] + "/index.html";
1711                     link.title = rawSearchIndex[crates[i]].doc;
1712                     link.className = klass;
1713                     link.textContent = crates[i];
1714
1715                     var li = document.createElement("li");
1716                     li.appendChild(link);
1717                     ul.appendChild(li);
1718                 }
1719                 sidebar.appendChild(div);
1720             }
1721         }
1722     }
1723
1724     window.initSearch = initSearch;
1725
1726     // delayed sidebar rendering.
1727     function initSidebarItems(items) {
1728         var sidebar = document.getElementsByClassName("sidebar-elems")[0];
1729         var current = window.sidebarCurrent;
1730
1731         function block(shortty, longty) {
1732             var filtered = items[shortty];
1733             if (!filtered) {
1734                 return;
1735             }
1736
1737             var div = document.createElement("div");
1738             div.className = "block " + shortty;
1739             var h3 = document.createElement("h3");
1740             h3.textContent = longty;
1741             div.appendChild(h3);
1742             var ul = document.createElement("ul");
1743
1744             var length = filtered.length;
1745             for (var i = 0; i < length; ++i) {
1746                 var item = filtered[i];
1747                 var name = item[0];
1748                 var desc = item[1]; // can be null
1749
1750                 var klass = shortty;
1751                 if (name === current.name && shortty === current.ty) {
1752                     klass += " current";
1753                 }
1754                 var path;
1755                 if (shortty === "mod") {
1756                     path = name + "/index.html";
1757                 } else {
1758                     path = shortty + "." + name + ".html";
1759                 }
1760                 var link = document.createElement("a");
1761                 link.href = current.relpath + path;
1762                 link.title = desc;
1763                 link.className = klass;
1764                 link.textContent = name;
1765                 var li = document.createElement("li");
1766                 li.appendChild(link);
1767                 ul.appendChild(li);
1768             }
1769             div.appendChild(ul);
1770             if (sidebar) {
1771                 sidebar.appendChild(div);
1772             }
1773         }
1774
1775         block("primitive", "Primitive Types");
1776         block("mod", "Modules");
1777         block("macro", "Macros");
1778         block("struct", "Structs");
1779         block("enum", "Enums");
1780         block("union", "Unions");
1781         block("constant", "Constants");
1782         block("static", "Statics");
1783         block("trait", "Traits");
1784         block("fn", "Functions");
1785         block("type", "Type Definitions");
1786         block("foreigntype", "Foreign Types");
1787         block("keyword", "Keywords");
1788         block("traitalias", "Trait Aliases");
1789     }
1790
1791     window.initSidebarItems = initSidebarItems;
1792
1793     window.register_implementors = function(imp) {
1794         var implementors = document.getElementById("implementors-list");
1795         var synthetic_implementors = document.getElementById("synthetic-implementors-list");
1796
1797         var libs = Object.getOwnPropertyNames(imp);
1798         var llength = libs.length;
1799         for (var i = 0; i < llength; ++i) {
1800             if (libs[i] === currentCrate) { continue; }
1801             var structs = imp[libs[i]];
1802
1803             var slength = structs.length;
1804             struct_loop:
1805             for (var j = 0; j < slength; ++j) {
1806                 var struct = structs[j];
1807
1808                 var list = struct.synthetic ? synthetic_implementors : implementors;
1809
1810                 if (struct.synthetic) {
1811                     var stlength = struct.types.length;
1812                     for (var k = 0; k < stlength; k++) {
1813                         if (window.inlined_types.has(struct.types[k])) {
1814                             continue struct_loop;
1815                         }
1816                         window.inlined_types.add(struct.types[k]);
1817                     }
1818                 }
1819
1820                 var code = document.createElement("code");
1821                 code.innerHTML = struct.text;
1822
1823                 var x = code.getElementsByTagName("a");
1824                 var xlength = x.length;
1825                 for (var it = 0; it < xlength; it++) {
1826                     var href = x[it].getAttribute("href");
1827                     if (href && href.indexOf("http") !== 0) {
1828                         x[it].setAttribute("href", rootPath + href);
1829                     }
1830                 }
1831                 var display = document.createElement("h3");
1832                 addClass(display, "impl");
1833                 display.innerHTML = "<span class=\"in-band\"><table class=\"table-display\">" +
1834                     "<tbody><tr><td><code>" + code.outerHTML + "</code></td><td></td></tr>" +
1835                     "</tbody></table></span>";
1836                 list.appendChild(display);
1837             }
1838         }
1839     };
1840     if (window.pending_implementors) {
1841         window.register_implementors(window.pending_implementors);
1842     }
1843
1844     function labelForToggleButton(sectionIsCollapsed) {
1845         if (sectionIsCollapsed) {
1846             // button will expand the section
1847             return "+";
1848         }
1849         // button will collapse the section
1850         // note that this text is also set in the HTML template in render.rs
1851         return "\u2212"; // "\u2212" is "−" minus sign
1852     }
1853
1854     function onEveryMatchingChild(elem, className, func) {
1855         if (elem && className && func) {
1856             var length = elem.childNodes.length;
1857             var nodes = elem.childNodes;
1858             for (var i = 0; i < length; ++i) {
1859                 if (hasClass(nodes[i], className)) {
1860                     func(nodes[i]);
1861                 } else {
1862                     onEveryMatchingChild(nodes[i], className, func);
1863                 }
1864             }
1865         }
1866     }
1867
1868     function toggleAllDocs(pageId, fromAutoCollapse) {
1869         var innerToggle = document.getElementById("toggle-all-docs");
1870         if (!innerToggle) {
1871             return;
1872         }
1873         if (hasClass(innerToggle, "will-expand")) {
1874             updateLocalStorage("rustdoc-collapse", "false");
1875             removeClass(innerToggle, "will-expand");
1876             onEveryMatchingChild(innerToggle, "inner", function(e) {
1877                 e.innerHTML = labelForToggleButton(false);
1878             });
1879             innerToggle.title = "collapse all docs";
1880             if (fromAutoCollapse !== true) {
1881                 onEachLazy(document.getElementsByClassName("collapse-toggle"), function(e) {
1882                     collapseDocs(e, "show");
1883                 });
1884             }
1885         } else {
1886             updateLocalStorage("rustdoc-collapse", "true");
1887             addClass(innerToggle, "will-expand");
1888             onEveryMatchingChild(innerToggle, "inner", function(e) {
1889                 var parent = e.parentNode;
1890                 var superParent = null;
1891
1892                 if (parent) {
1893                     superParent = parent.parentNode;
1894                 }
1895                 if (!parent || !superParent || superParent.id !== "main" ||
1896                     hasClass(parent, "impl") === false) {
1897                     e.innerHTML = labelForToggleButton(true);
1898                 }
1899             });
1900             innerToggle.title = "expand all docs";
1901             if (fromAutoCollapse !== true) {
1902                 onEachLazy(document.getElementsByClassName("collapse-toggle"), function(e) {
1903                     var parent = e.parentNode;
1904                     var superParent = null;
1905
1906                     if (parent) {
1907                         superParent = parent.parentNode;
1908                     }
1909                     if (!parent || !superParent || superParent.id !== "main" ||
1910                         hasClass(parent, "impl") === false) {
1911                         collapseDocs(e, "hide", pageId);
1912                     }
1913                 });
1914             }
1915         }
1916     }
1917
1918     function collapseDocs(toggle, mode, pageId) {
1919         if (!toggle || !toggle.parentNode) {
1920             return;
1921         }
1922
1923         function adjustToggle(arg) {
1924             return function(e) {
1925                 if (hasClass(e, "toggle-label")) {
1926                     if (arg) {
1927                         e.style.display = "inline-block";
1928                     } else {
1929                         e.style.display = "none";
1930                     }
1931                 }
1932                 if (hasClass(e, "inner")) {
1933                     e.innerHTML = labelForToggleButton(arg);
1934                 }
1935             };
1936         }
1937
1938         function implHider(addOrRemove, fullHide) {
1939             return function(n) {
1940                 var is_method = hasClass(n, "method") || fullHide;
1941                 if (is_method || hasClass(n, "type")) {
1942                     if (is_method === true) {
1943                         if (addOrRemove) {
1944                             addClass(n, "hidden-by-impl-hider");
1945                         } else {
1946                             removeClass(n, "hidden-by-impl-hider");
1947                         }
1948                     }
1949                     var ns = n.nextElementSibling;
1950                     while (true) {
1951                         if (ns && (
1952                                 hasClass(ns, "docblock") ||
1953                                 hasClass(ns, "stability"))) {
1954                             if (addOrRemove) {
1955                                 addClass(ns, "hidden-by-impl-hider");
1956                             } else {
1957                                 removeClass(ns, "hidden-by-impl-hider");
1958                             }
1959                             ns = ns.nextElementSibling;
1960                             continue;
1961                         }
1962                         break;
1963                     }
1964                 }
1965             };
1966         }
1967
1968         var relatedDoc;
1969         var action = mode;
1970         if (hasClass(toggle.parentNode, "impl") === false) {
1971             relatedDoc = toggle.parentNode.nextElementSibling;
1972             if (hasClass(relatedDoc, "stability")) {
1973                 relatedDoc = relatedDoc.nextElementSibling;
1974             }
1975             if (hasClass(relatedDoc, "docblock") || hasClass(relatedDoc, "sub-variant")) {
1976                 if (mode === "toggle") {
1977                     if (hasClass(relatedDoc, "hidden-by-usual-hider")) {
1978                         action = "show";
1979                     } else {
1980                         action = "hide";
1981                     }
1982                 }
1983                 if (action === "hide") {
1984                     addClass(relatedDoc, "hidden-by-usual-hider");
1985                     onEachLazy(toggle.childNodes, adjustToggle(true));
1986                     addClass(toggle.parentNode, "collapsed");
1987                 } else if (action === "show") {
1988                     removeClass(relatedDoc, "hidden-by-usual-hider");
1989                     removeClass(toggle.parentNode, "collapsed");
1990                     onEachLazy(toggle.childNodes, adjustToggle(false));
1991                 }
1992             }
1993         } else {
1994             // we are collapsing the impl block(s).
1995
1996             var parentElem = toggle.parentNode;
1997             relatedDoc = parentElem;
1998             var docblock = relatedDoc.nextElementSibling;
1999
2000             while (hasClass(relatedDoc, "impl-items") === false) {
2001                 relatedDoc = relatedDoc.nextElementSibling;
2002             }
2003
2004             if ((!relatedDoc && hasClass(docblock, "docblock") === false) ||
2005                 (pageId && document.getElementById(pageId))) {
2006                 return;
2007             }
2008
2009             // Hide all functions, but not associated types/consts.
2010
2011             if (mode === "toggle") {
2012                 if (hasClass(relatedDoc, "fns-now-collapsed") ||
2013                     hasClass(docblock, "hidden-by-impl-hider")) {
2014                     action = "show";
2015                 } else {
2016                     action = "hide";
2017                 }
2018             }
2019
2020             var dontApplyBlockRule = toggle.parentNode.parentNode.id !== "main";
2021             if (action === "show") {
2022                 removeClass(relatedDoc, "fns-now-collapsed");
2023                 removeClass(docblock, "hidden-by-usual-hider");
2024                 onEachLazy(toggle.childNodes, adjustToggle(false, dontApplyBlockRule));
2025                 onEachLazy(relatedDoc.childNodes, implHider(false, dontApplyBlockRule));
2026             } else if (action === "hide") {
2027                 addClass(relatedDoc, "fns-now-collapsed");
2028                 addClass(docblock, "hidden-by-usual-hider");
2029                 onEachLazy(toggle.childNodes, adjustToggle(true, dontApplyBlockRule));
2030                 onEachLazy(relatedDoc.childNodes, implHider(true, dontApplyBlockRule));
2031             }
2032         }
2033     }
2034
2035     function collapser(e, collapse) {
2036         // inherent impl ids are like "impl" or impl-<number>'.
2037         // they will never be hidden by default.
2038         var n = e.parentElement;
2039         if (n.id.match(/^impl(?:-\d+)?$/) === null) {
2040             // Automatically minimize all non-inherent impls
2041             if (collapse || hasClass(n, "impl")) {
2042                 collapseDocs(e, "hide", pageId);
2043             }
2044         }
2045     }
2046
2047     function autoCollapse(pageId, collapse) {
2048         if (collapse) {
2049             toggleAllDocs(pageId, true);
2050         } else if (getCurrentValue("rustdoc-trait-implementations") !== "false") {
2051             var impl_list = document.getElementById("implementations-list");
2052
2053             if (impl_list !== null) {
2054                 onEachLazy(impl_list.getElementsByClassName("collapse-toggle"), function(e) {
2055                     collapser(e, collapse);
2056                 });
2057             }
2058         }
2059     }
2060
2061     var toggles = document.getElementById("toggle-all-docs");
2062     if (toggles) {
2063         toggles.onclick = toggleAllDocs;
2064     }
2065
2066     function insertAfter(newNode, referenceNode) {
2067         referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
2068     }
2069
2070     function createSimpleToggle(sectionIsCollapsed) {
2071         var toggle = document.createElement("a");
2072         toggle.href = "javascript:void(0)";
2073         toggle.className = "collapse-toggle";
2074         toggle.innerHTML = "[<span class=\"inner\">" + labelForToggleButton(sectionIsCollapsed) +
2075                            "</span>]";
2076         return toggle;
2077     }
2078
2079     var toggle = createSimpleToggle(false);
2080
2081     var func = function(e) {
2082         var next = e.nextElementSibling;
2083         if (!next) {
2084             return;
2085         }
2086         if (hasClass(next, "docblock") ||
2087             (hasClass(next, "stability") &&
2088              hasClass(next.nextElementSibling, "docblock"))) {
2089             insertAfter(toggle.cloneNode(true), e.childNodes[e.childNodes.length - 1]);
2090         }
2091     };
2092
2093     var funcImpl = function(e) {
2094         var next = e.nextElementSibling;
2095         if (next && hasClass(next, "docblock")) {
2096             next = next.nextElementSibling;
2097         }
2098         if (!next) {
2099             return;
2100         }
2101         if (next.getElementsByClassName("method").length > 0 && hasClass(e, "impl")) {
2102             insertAfter(toggle.cloneNode(true), e.childNodes[e.childNodes.length - 1]);
2103         }
2104     };
2105
2106     onEachLazy(document.getElementsByClassName("method"), func);
2107     onEachLazy(document.getElementsByClassName("associatedconstant"), func);
2108     onEachLazy(document.getElementsByClassName("impl"), funcImpl);
2109     var impl_call = function() {};
2110     if (getCurrentValue("rustdoc-method-docs") !== "false") {
2111         impl_call = function(e, newToggle, pageId) {
2112             if (e.id.match(/^impl(?:-\d+)?$/) === null) {
2113                 // Automatically minimize all non-inherent impls
2114                 if (hasClass(e, "impl")) {
2115                     collapseDocs(newToggle, "hide", pageId);
2116                 }
2117             }
2118         };
2119     }
2120     var pageId = getPageId();
2121     var newToggle = document.createElement("a");
2122     newToggle.href = "javascript:void(0)";
2123     newToggle.className = "collapse-toggle hidden-default collapsed";
2124     newToggle.innerHTML = "[<span class=\"inner\">" + labelForToggleButton(true) +
2125                           "</span>] Show hidden undocumented items";
2126     function toggleClicked() {
2127         if (hasClass(this, "collapsed")) {
2128             removeClass(this, "collapsed");
2129             onEachLazy(this.parentNode.getElementsByClassName("hidden"), function(x) {
2130                 if (hasClass(x, "content") === false) {
2131                     removeClass(x, "hidden");
2132                     addClass(x, "x");
2133                 }
2134             }, true);
2135             this.innerHTML = "[<span class=\"inner\">" + labelForToggleButton(false) +
2136                              "</span>] Hide undocumented items";
2137         } else {
2138             addClass(this, "collapsed");
2139             onEachLazy(this.parentNode.getElementsByClassName("x"), function(x) {
2140                 if (hasClass(x, "content") === false) {
2141                     addClass(x, "hidden");
2142                     removeClass(x, "x");
2143                 }
2144             }, true);
2145             this.innerHTML = "[<span class=\"inner\">" + labelForToggleButton(true) +
2146                              "</span>] Show hidden undocumented items";
2147         }
2148     }
2149     onEachLazy(document.getElementsByClassName("impl-items"), function(e) {
2150         onEachLazy(e.getElementsByClassName("associatedconstant"), func);
2151         var hiddenElems = e.getElementsByClassName("hidden");
2152         var needToggle = false;
2153
2154         var hlength = hiddenElems.length;
2155         for (var i = 0; i < hlength; ++i) {
2156             if (hasClass(hiddenElems[i], "content") === false &&
2157                 hasClass(hiddenElems[i], "docblock") === false) {
2158                 needToggle = true;
2159                 break;
2160             }
2161         }
2162         if (needToggle === true) {
2163             var inner_toggle = newToggle.cloneNode(true);
2164             inner_toggle.onclick = toggleClicked;
2165             e.insertBefore(inner_toggle, e.firstChild);
2166             impl_call(e, inner_toggle, pageId);
2167         }
2168     });
2169
2170     function createToggle(otherMessage, fontSize, extraClass, show) {
2171         var span = document.createElement("span");
2172         span.className = "toggle-label";
2173         if (show) {
2174             span.style.display = "none";
2175         }
2176         if (!otherMessage) {
2177             span.innerHTML = "&nbsp;Expand&nbsp;description";
2178         } else {
2179             span.innerHTML = otherMessage;
2180         }
2181
2182         if (fontSize) {
2183             span.style.fontSize = fontSize;
2184         }
2185
2186         var mainToggle = toggle.cloneNode(true);
2187         mainToggle.appendChild(span);
2188
2189         var wrapper = document.createElement("div");
2190         wrapper.className = "toggle-wrapper";
2191         if (!show) {
2192             addClass(wrapper, "collapsed");
2193             var inner = mainToggle.getElementsByClassName("inner");
2194             if (inner && inner.length > 0) {
2195                 inner[0].innerHTML = "+";
2196             }
2197         }
2198         if (extraClass) {
2199             addClass(wrapper, extraClass);
2200         }
2201         wrapper.appendChild(mainToggle);
2202         return wrapper;
2203     }
2204
2205     var showItemDeclarations = getCurrentValue("rustdoc-item-declarations") === "false";
2206     function buildToggleWrapper(e) {
2207         if (hasClass(e, "autohide")) {
2208             var wrap = e.previousElementSibling;
2209             if (wrap && hasClass(wrap, "toggle-wrapper")) {
2210                 var inner_toggle = wrap.childNodes[0];
2211                 var extra = e.childNodes[0].tagName === "H3";
2212
2213                 e.style.display = "none";
2214                 addClass(wrap, "collapsed");
2215                 onEachLazy(inner_toggle.getElementsByClassName("inner"), function(e) {
2216                     e.innerHTML = labelForToggleButton(true);
2217                 });
2218                 onEachLazy(inner_toggle.getElementsByClassName("toggle-label"), function(e) {
2219                     e.style.display = "inline-block";
2220                     if (extra === true) {
2221                         i_e.innerHTML = " Show " + e.childNodes[0].innerHTML;
2222                     }
2223                 });
2224             }
2225         }
2226         if (e.parentNode.id === "main") {
2227             var otherMessage = "";
2228             var fontSize;
2229             var extraClass;
2230
2231             if (hasClass(e, "type-decl")) {
2232                 fontSize = "20px";
2233                 otherMessage = "&nbsp;Show&nbsp;declaration";
2234                 if (showItemDeclarations === false) {
2235                     extraClass = "collapsed";
2236                 }
2237             } else if (hasClass(e, "sub-variant")) {
2238                 otherMessage = "&nbsp;Show&nbsp;fields";
2239             } else if (hasClass(e, "non-exhaustive")) {
2240                 otherMessage = "&nbsp;This&nbsp;";
2241                 if (hasClass(e, "non-exhaustive-struct")) {
2242                     otherMessage += "struct";
2243                 } else if (hasClass(e, "non-exhaustive-enum")) {
2244                     otherMessage += "enum";
2245                 } else if (hasClass(e, "non-exhaustive-type")) {
2246                     otherMessage += "type";
2247                 }
2248                 otherMessage += "&nbsp;is&nbsp;marked&nbsp;as&nbsp;non-exhaustive";
2249             } else if (hasClass(e.childNodes[0], "impl-items")) {
2250                 extraClass = "marg-left";
2251             }
2252
2253             e.parentNode.insertBefore(
2254                 createToggle(otherMessage,
2255                              fontSize,
2256                              extraClass,
2257                              hasClass(e, "type-decl") === false || showItemDeclarations === true),
2258                 e);
2259             if (hasClass(e, "type-decl") === true && showItemDeclarations === true) {
2260                 collapseDocs(e.previousSibling.childNodes[0], "toggle");
2261             }
2262         }
2263     }
2264
2265     onEachLazy(document.getElementsByClassName("docblock"), buildToggleWrapper);
2266     onEachLazy(document.getElementsByClassName("sub-variant"), buildToggleWrapper);
2267
2268     // In the search display, allows to switch between tabs.
2269     function printTab(nb) {
2270         if (nb === 0 || nb === 1 || nb === 2) {
2271             currentTab = nb;
2272         }
2273         var nb_copy = nb;
2274         onEachLazy(document.getElementById("titles").childNodes, function(elem) {
2275             if (nb_copy === 0) {
2276                 addClass(elem, "selected");
2277             } else {
2278                 removeClass(elem, "selected");
2279             }
2280             nb_copy -= 1;
2281         });
2282         onEachLazy(document.getElementById("results").childNodes, function(elem) {
2283             if (nb === 0) {
2284                 elem.style.display = "";
2285             } else {
2286                 elem.style.display = "none";
2287             }
2288             nb -= 1;
2289         });
2290     }
2291
2292     function createToggleWrapper(tog) {
2293         var span = document.createElement("span");
2294         span.className = "toggle-label";
2295         span.style.display = "none";
2296         span.innerHTML = "&nbsp;Expand&nbsp;attributes";
2297         tog.appendChild(span);
2298
2299         var wrapper = document.createElement("div");
2300         wrapper.className = "toggle-wrapper toggle-attributes";
2301         wrapper.appendChild(tog);
2302         return wrapper;
2303     }
2304
2305     // To avoid checking on "rustdoc-item-attributes" value on every loop...
2306     var itemAttributesFunc = function() {};
2307     if (getCurrentValue("rustdoc-item-attributes") !== "false") {
2308         itemAttributesFunc = function(x) {
2309             collapseDocs(x.previousSibling.childNodes[0], "toggle");
2310         };
2311     }
2312     var attributesToggle = createToggleWrapper(createSimpleToggle(false));
2313     onEachLazy(main.getElementsByClassName("attributes"), function(i_e) {
2314         i_e.parentNode.insertBefore(attributesToggle.cloneNode(true), i_e);
2315         itemAttributesFunc(i_e);
2316     });
2317
2318     // To avoid checking on "rustdoc-line-numbers" value on every loop...
2319     var lineNumbersFunc = function() {};
2320     if (getCurrentValue("rustdoc-line-numbers") === "true") {
2321         lineNumbersFunc = function(x) {
2322             var count = x.textContent.split("\n").length;
2323             var elems = [];
2324             for (var i = 0; i < count; ++i) {
2325                 elems.push(i + 1);
2326             }
2327             var node = document.createElement("pre");
2328             addClass(node, "line-number");
2329             node.innerHTML = elems.join("\n");
2330             x.parentNode.insertBefore(node, x);
2331         };
2332     }
2333     onEachLazy(document.getElementsByClassName("rust-example-rendered"), function(e) {
2334         if (hasClass(e, "compile_fail")) {
2335             e.addEventListener("mouseover", function(event) {
2336                 this.parentElement.previousElementSibling.childNodes[0].style.color = "#f00";
2337             });
2338             e.addEventListener("mouseout", function(event) {
2339                 this.parentElement.previousElementSibling.childNodes[0].style.color = "";
2340             });
2341         } else if (hasClass(e, "ignore")) {
2342             e.addEventListener("mouseover", function(event) {
2343                 this.parentElement.previousElementSibling.childNodes[0].style.color = "#ff9200";
2344             });
2345             e.addEventListener("mouseout", function(event) {
2346                 this.parentElement.previousElementSibling.childNodes[0].style.color = "";
2347             });
2348         }
2349         lineNumbersFunc(e);
2350     });
2351
2352     function showModal(content) {
2353         var modal = document.createElement("div");
2354         modal.id = "important";
2355         addClass(modal, "modal");
2356         modal.innerHTML = "<div class=\"modal-content\"><div class=\"close\" id=\"modal-close\">✕" +
2357                           "</div><div class=\"whiter\"></div><span class=\"docblock\">" + content +
2358                           "</span></div>";
2359         document.getElementsByTagName("body")[0].appendChild(modal);
2360         document.getElementById("modal-close").onclick = hideModal;
2361         modal.onclick = hideModal;
2362     }
2363
2364     function hideModal() {
2365         var modal = document.getElementById("important");
2366         if (modal) {
2367             modal.parentNode.removeChild(modal);
2368         }
2369     }
2370
2371     onEachLazy(document.getElementsByClassName("important-traits"), function(e) {
2372         e.onclick = function() {
2373             showModal(e.lastElementChild.innerHTML);
2374         };
2375     });
2376
2377     function putBackSearch(search_input) {
2378         if (search_input.value !== "") {
2379             addClass(main, "hidden");
2380             removeClass(document.getElementById("search"), "hidden");
2381             if (browserSupportsHistoryApi()) {
2382                 history.replaceState(search_input.value,
2383                                      "",
2384                                      "?search=" + encodeURIComponent(search_input.value));
2385             }
2386         }
2387     }
2388
2389     if (search_input) {
2390         search_input.onfocus = function() {
2391             putBackSearch(this);
2392         };
2393     }
2394
2395     var params = getQueryStringParams();
2396     if (params && params.search) {
2397         addClass(main, "hidden");
2398         var search = document.getElementById("search");
2399         removeClass(search, "hidden");
2400         search.innerHTML = "<h3 style=\"text-align: center;\">Loading search results...</h3>";
2401     }
2402
2403     var sidebar_menu = document.getElementsByClassName("sidebar-menu")[0];
2404     if (sidebar_menu) {
2405         sidebar_menu.onclick = function() {
2406             var sidebar = document.getElementsByClassName("sidebar")[0];
2407             if (hasClass(sidebar, "mobile") === true) {
2408                 hideSidebar();
2409             } else {
2410                 showSidebar();
2411             }
2412         };
2413     }
2414
2415     window.onresize = function() {
2416         hideSidebar();
2417     };
2418
2419     autoCollapse(getPageId(), getCurrentValue("rustdoc-collapse") === "true");
2420
2421     if (window.location.hash && window.location.hash.length > 0) {
2422         expandSection(window.location.hash.replace(/^#/, ""));
2423     }
2424
2425     if (main) {
2426         onEachLazy(main.getElementsByClassName("loading-content"), function(e) {
2427             e.remove();
2428         });
2429         onEachLazy(main.childNodes, function(e) {
2430             // Unhide the actual content once loading is complete. Headers get
2431             // flex treatment for their horizontal layout, divs get block treatment
2432             // for vertical layout (column-oriented flex layout for divs caused
2433             // errors in mobile browsers).
2434             if (e.tagName === "H2" || e.tagName === "H3") {
2435                 var nextTagName = e.nextElementSibling.tagName;
2436                 if (nextTagName == "H2" || nextTagName == "H3") {
2437                     e.nextElementSibling.style.display = "flex";
2438                 } else {
2439                     e.nextElementSibling.style.display = "block";
2440                 }
2441             }
2442         });
2443     }
2444
2445     function addSearchOptions(crates) {
2446         var elem = document.getElementById('crate-search');
2447
2448         if (!elem) {
2449             return;
2450         }
2451         var crates_text = [];
2452         if (Object.keys(crates).length > 1) {
2453             for (var crate in crates) {
2454                 if (crates.hasOwnProperty(crate)) {
2455                     crates_text.push(crate);
2456                 }
2457             }
2458         }
2459         crates_text.sort(function(a, b) {
2460             var lower_a = a.toLowerCase();
2461             var lower_b = b.toLowerCase();
2462
2463             if (lower_a < lower_b) {
2464                 return -1;
2465             } else if (lower_a > lower_b) {
2466                 return 1;
2467             }
2468             return 0;
2469         });
2470         for (var i = 0; i < crates_text.length; ++i) {
2471             var option = document.createElement("option");
2472             option.value = crates_text[i];
2473             option.innerText = crates_text[i];
2474             elem.appendChild(option);
2475         }
2476     }
2477
2478     window.addSearchOptions = addSearchOptions;
2479 }());
2480
2481 // Sets the focus on the search bar at the top of the page
2482 function focusSearchBar() {
2483     document.getElementsByClassName("search-input")[0].focus();
2484 }
2485
2486 // Removes the focus from the search bar
2487 function defocusSearchBar() {
2488     document.getElementsByClassName("search-input")[0].blur();
2489 }