skins/common/mwsuggest.js

   1 /*
   2  * OpenSearch ajax suggestion engine for MediaWiki
   3  *
   4  * uses core MediaWiki open search support to fetch suggestions
   5  * and show them below search boxes and other inputs
   6  *
   7  * by Robert Stojnic (April 2008)
   8  */
   9
  10 // search_box_id -> Results object
  11 var os_map = {};
  12 // cached data, url -> json_text
  13 var os_cache = {};
  14 // global variables for suggest_keypress
  15 var os_cur_keypressed = 0;
  16 var os_last_keypress = 0;
  17 var os_keypressed_count = 0;
  18 // type: Timer
  19 var os_timer = null;
  20 // tie mousedown/up events
  21 var os_mouse_pressed = false;
  22 var os_mouse_num = -1;
  23 // if true, the last change was made by mouse (and not keyboard)
  24 var os_mouse_moved = false;
  25 // delay between keypress and suggestion (in ms)
  26 var os_search_timeout = 250;
  27 // these pairs of inputs/forms will be autoloaded at startup
  28 var os_autoload_inputs = new Array('searchInput', 'searchInput2', 'powerSearchText', 'searchText');
  29 var os_autoload_forms = new Array('searchform', 'searchform2', 'powersearch', 'search' );
  30 // if we stopped the service
  31 var os_is_stopped = false;
  32 // max lines to show in suggest table
  33 var os_max_lines_per_suggest = 7;
  34 // number of steps to animate expansion/contraction of container width
  35 var os_animation_steps = 6;
  36 // num of pixels of smallest step
  37 var os_animation_min_step = 2;
  38 // delay between steps (in ms)
  39 var os_animation_delay = 30;
  40 // max width of container in percent of normal size (1 == 100%)
  41 var os_container_max_width = 2;
  42 // currently active animation timer
  43 var os_animation_timer = null;
  44
  45 /** Timeout timer class that will fetch the results */
  46 function os_Timer(id,r,query){
  47         this.id = id;
  48         this.r = r;
  49         this.query = query;
  50 }
  51
  52 /** Timer user to animate expansion/contraction of container width */
  53 function os_AnimationTimer(r, target){
  54         this.r = r;
  55         var current = document.getElementById(r.container).offsetWidth;
  56         this.inc = Math.round((target-current) / os_animation_steps);
  57         if(this.inc < os_animation_min_step && this.inc >=0)
  58                 this.inc = os_animation_min_step; // minimal animation step
  59         if(this.inc > -os_animation_min_step && this.inc <0)
  60                 this.inc = -os_animation_min_step;
  61         this.target = target;
  62 }
  63
  64 /** Property class for single search box */
  65 function os_Results(name, formname){
  66         this.searchform = formname; // id of the searchform
  67         this.searchbox = name; // id of the searchbox
  68         this.container = name+"Suggest"; // div that holds results
  69         this.resultTable = name+"Result"; // id base for the result table (+num = table row)
  70         this.resultText = name+"ResultText"; // id base for the spans within result tables (+num)
  71         this.toggle = name+"Toggle"; // div that has the toggle (enable/disable) link
  72         this.query = null; // last processed query
  73         this.results = null;  // parsed titles
  74         this.resultCount = 0; // number of results
  75         this.original = null; // query that user entered
  76         this.selected = -1; // which result is selected
  77         this.containerCount = 0; // number of results visible in container
  78         this.containerRow = 0; // height of result field in the container
  79         this.containerTotal = 0; // total height of the container will all results
  80         this.visible = false; // if container is visible
  81 }
  82
  83 /** Hide results div */
  84 function os_hideResults(r){
  85         var c = document.getElementById(r.container);
  86         if(c != null)
  87                 c.style.visibility = "hidden";
  88         r.visible = false;
  89         r.selected = -1;
  90 }
  91
  92 /** Show results div */
  93 function os_showResults(r){
  94         if(os_is_stopped)
  95                 return;
  96         os_fitContainer(r);
  97         var c = document.getElementById(r.container);
  98         r.selected = -1;
  99         if(c != null){
 100                 c.scrollTop = 0;
 101                 c.style.visibility = "visible";
 102                 r.visible = true;
 103         }
 104 }
 105
 106 function os_operaWidthFix(x){
 107         // TODO: better css2 incompatibility detection here
 108         if(is_opera || is_khtml || navigator.userAgent.toLowerCase().indexOf('firefox/1')!=-1){
 109                 return 30; // opera&konqueror & old firefox don't understand overflow-x, estimate scrollbar width
 110         }
 111         return 0;
 112 }
 113
 114 function os_encodeQuery(value){
 115   if (encodeURIComponent) {
 116     return encodeURIComponent(value);
 117   }
 118   if(escape) {
 119     return escape(value);
 120   }
 121   return null;
 122 }
 123 function os_decodeValue(value){
 124   if (decodeURIComponent) {
 125     return decodeURIComponent(value);
 126   }
 127   if(unescape){
 128         return unescape(value);
 129   }
 130   return null;
 131 }
 132
 133 /** Brower-dependent functions to find window inner size, and scroll status */
 134 function f_clientWidth() {
 135         return f_filterResults (
 136                 window.innerWidth ? window.innerWidth : 0,
 137                 document.documentElement ? document.documentElement.clientWidth : 0,
 138                 document.body ? document.body.clientWidth : 0
 139         );
 140 }
 141 function f_clientHeight() {
 142         return f_filterResults (
 143                 window.innerHeight ? window.innerHeight : 0,
 144                 document.documentElement ? document.documentElement.clientHeight : 0,
 145                 document.body ? document.body.clientHeight : 0
 146         );
 147 }
 148 function f_scrollLeft() {
 149         return f_filterResults (
 150                 window.pageXOffset ? window.pageXOffset : 0,
 151                 document.documentElement ? document.documentElement.scrollLeft : 0,
 152                 document.body ? document.body.scrollLeft : 0
 153         );
 154 }
 155 function f_scrollTop() {
 156         return f_filterResults (
 157                 window.pageYOffset ? window.pageYOffset : 0,
 158                 document.documentElement ? document.documentElement.scrollTop : 0,
 159                 document.body ? document.body.scrollTop : 0
 160         );
 161 }
 162 function f_filterResults(n_win, n_docel, n_body) {
 163         var n_result = n_win ? n_win : 0;
 164         if (n_docel && (!n_result || (n_result > n_docel)))
 165                 n_result = n_docel;
 166         return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
 167 }
 168
 169 /** Get the height available for the results container */
 170 function os_availableHeight(r){
 171         var absTop = document.getElementById(r.container).style.top;
 172         var px = absTop.lastIndexOf("px");
 173         if(px > 0)
 174                 absTop = absTop.substring(0,px);
 175         return f_clientHeight() - (absTop - f_scrollTop());
 176 }
 177
 178
 179 /** Get element absolute position {left,top} */
 180 function os_getElementPosition(elemID){
 181         var offsetTrail = document.getElementById(elemID);
 182         var offsetLeft = 0;
 183         var offsetTop = 0;
 184         while (offsetTrail){
 185                 offsetLeft += offsetTrail.offsetLeft;
 186                 offsetTop += offsetTrail.offsetTop;
 187                 offsetTrail = offsetTrail.offsetParent;
 188         }
 189         if (navigator.userAgent.indexOf('Mac') != -1 && typeof document.body.leftMargin != 'undefined'){
 190                 offsetLeft += document.body.leftMargin;
 191                 offsetTop += document.body.topMargin;
 192         }
 193         return {left:offsetLeft,top:offsetTop};
 194 }
 195
 196 /** Create the container div that will hold the suggested titles */
 197 function os_createContainer(r){
 198         var c = document.createElement("div");
 199         var s = document.getElementById(r.searchbox);
 200         var pos = os_getElementPosition(r.searchbox);
 201         var left = pos.left;
 202         var top = pos.top + s.offsetHeight;
 203         c.className = "os-suggest";
 204         c.setAttribute("id", r.container);
 205         document.body.appendChild(c);
 206
 207         // dynamically generated style params
 208         // IE workaround, cannot explicitely set "style" attribute
 209         c = document.getElementById(r.container);
 210         c.style.top = top+"px";
 211         c.style.left = left+"px";
 212         c.style.width = s.offsetWidth+"px";
 213
 214         // mouse event handlers
 215         c.onmouseover = function(event) { os_eventMouseover(r.searchbox, event); };
 216         c.onmousemove = function(event) { os_eventMousemove(r.searchbox, event); };
 217         c.onmousedown = function(event) { return os_eventMousedown(r.searchbox, event); };
 218         c.onmouseup = function(event) { os_eventMouseup(r.searchbox, event); };
 219         return c;
 220 }
 221
 222 /** change container height to fit to screen */
 223 function os_fitContainer(r){
 224         var c = document.getElementById(r.container);
 225         var h = os_availableHeight(r) - 20;
 226         var inc = r.containerRow;
 227         h = parseInt(h/inc) * inc;
 228         if(h < (2 * inc) && r.resultCount > 1) // min: two results
 229                 h = 2 * inc;
 230         if((h/inc) > os_max_lines_per_suggest )
 231                 h = inc * os_max_lines_per_suggest;
 232         if(h < r.containerTotal){
 233                 c.style.height = h +"px";
 234                 r.containerCount = parseInt(Math.round(h/inc));
 235         } else{
 236                 c.style.height = r.containerTotal+"px";
 237                 r.containerCount = r.resultCount;
 238         }
 239 }
 240 /** If some entries are longer than the box, replace text with "..." */
 241 function os_trimResultText(r){
 242         // find max width, first see if we could expand the container to fit it
 243         var maxW = 0;
 244         for(var i=0;i<r.resultCount;i++){
 245                 var e = document.getElementById(r.resultText+i);
 246                 if(e.offsetWidth > maxW)
 247                         maxW = e.offsetWidth;
 248         }
 249         var w = document.getElementById(r.container).offsetWidth;
 250         var fix = 0;
 251         if(r.containerCount < r.resultCount){
 252                 fix = 20; // give 20px for scrollbar
 253         } else
 254                 fix = os_operaWidthFix(w);
 255         if(fix < 4)
 256                 fix = 4; // basic padding
 257         maxW += fix;
 258
 259         // resize container to fit more data if permitted
 260         var normW = document.getElementById(r.searchbox).offsetWidth;
 261         var prop = maxW / normW;
 262         if(prop > os_container_max_width)
 263                 prop = os_container_max_width;
 264         else if(prop < 1)
 265                 prop = 1;
 266         var newW = Math.round( normW * prop );
 267         if( w != newW ){
 268                 w = newW;
 269                 if( os_animation_timer != null )
 270                         clearInterval(os_animation_timer.id)
 271                 os_animation_timer = new os_AnimationTimer(r,w);
 272                 os_animation_timer.id = setInterval("os_animateChangeWidth()",os_animation_delay);
 273                 w -= fix; // this much is reserved
 274         }
 275
 276         // trim results
 277         if(w < 10)
 278                 return;
 279         for(var i=0;i<r.resultCount;i++){
 280                 var e = document.getElementById(r.resultText+i);
 281                 var replace = 1;
 282                 var lastW = e.offsetWidth+1;
 283                 var iteration = 0;
 284                 var changedText = false;
 285                 while(e.offsetWidth > w && (e.offsetWidth < lastW || iteration<2)){
 286                         changedText = true;
 287                         lastW = e.offsetWidth;
 288                         var l = e.innerHTML;
 289                         e.innerHTML = l.substring(0,l.length-replace)+"...";
 290                         iteration++;
 291                         replace = 4; // how many chars to replace
 292                 }
 293                 if(changedText){
 294                         // show hint for trimmed titles
 295                         document.getElementById(r.resultTable+i).setAttribute("title",r.results[i]);
 296                 }
 297         }
 298 }
 299
 300 /** Invoked on timer to animate change in container width */
 301 function os_animateChangeWidth(){
 302         var r = os_animation_timer.r;
 303         var c = document.getElementById(r.container);
 304         var w = c.offsetWidth;
 305         var normW = document.getElementById(r.searchbox).offsetWidth;
 306         var normL = os_getElementPosition(r.searchbox).left;
 307         var inc = os_animation_timer.inc;
 308         var target = os_animation_timer.target;
 309         var nw = w + inc;
 310         if( (inc > 0 && nw >= target) || (inc <= 0 && nw <= target) ){
 311                 // finished !
 312                 c.style.width = target+"px";
 313                 clearInterval(os_animation_timer.id)
 314                 os_animation_timer = null;
 315         } else{
 316                 // in-progress
 317                 c.style.width = nw+"px";
 318                 if(document.documentElement.dir == "rtl")
 319                         c.style.left = (normL + normW + (target - nw) - os_animation_timer.target - 1)+"px";
 320         }
 321 }
 322
 323 /** Handles data from XMLHttpRequest, and updates the suggest results */
 324 function os_updateResults(r, query, text, cacheKey){
 325         os_cache[cacheKey] = text;
 326         r.query = query;
 327         r.original = query;
 328         if(text == ""){
 329                 r.results = null;
 330                 r.resultCount = 0;
 331                 os_hideResults(r);
 332         } else{
 333                 try {
 334                         var p = eval('('+text+')'); // simple json parse, could do a safer one
 335                         if(p.length<2 || p[1].length == 0){
 336                                 r.results = null;
 337                                 r.resultCount = 0;
 338                                 os_hideResults(r);
 339                                 return;
 340                         }
 341                         var c = document.getElementById(r.container);
 342                         if(c == null)
 343                                 c = os_createContainer(r);
 344                         c.innerHTML = os_createResultTable(r,p[1]);
 345                         // init container table sizes
 346                         var t = document.getElementById(r.resultTable);
 347                         r.containerTotal = t.offsetHeight;
 348                         r.containerRow = t.offsetHeight / r.resultCount;
 349                         os_fitContainer(r);
 350                         os_trimResultText(r);
 351                         os_showResults(r);
 352                 } catch(e){
 353                         // bad response from server or such
 354                         os_hideResults(r);
 355                         os_cache[cacheKey] = null;
 356                 }
 357         }
 358 }
 359
 360 /** Create the result table to be placed in the container div */
 361 function os_createResultTable(r, results){
 362         var c = document.getElementById(r.container);
 363         var width = c.offsetWidth - os_operaWidthFix(c.offsetWidth);
 364         var html = "<table class=\"os-suggest-results\" id=\""+r.resultTable+"\" style=\"width: "+width+"px;\">";
 365         r.results = new Array();
 366         r.resultCount = results.length;
 367         for(i=0;i<results.length;i++){
 368                 var title = os_decodeValue(results[i]);
 369                 r.results[i] = title;
 370                 html += "<tr><td class=\"os-suggest-result\" id=\""+r.resultTable+i+"\"><span id=\""+r.resultText+i+"\">"+title+"</span></td></tr>";
 371         }
 372         html+="</table>"
 373         return html;
 374 }
 375
 376 /** Fetch namespaces from checkboxes or hidden fields in the search form,
 377     if none defined use wgSearchNamespaces global */
 378 function os_getNamespaces(r){
 379         var namespaces = "";
 380         var elements = document.forms[r.searchform].elements;
 381         for(i=0; i < elements.length; i++){
 382                 var name = elements[i].name;
 383                 if(typeof name != 'undefined' && name.length > 2
 384                 && name[0]=='n' && name[1]=='s'
 385                 && ((elements[i].type=='checkbox' && elements[i].checked)
 386                         || (elements[i].type=='hidden' && elements[i].value=="1")) ){
 387                         if(namespaces!="")
 388                                 namespaces+="|";
 389                         namespaces+=name.substring(2);
 390                 }
 391         }
 392         if(namespaces == "")
 393                 namespaces = wgSearchNamespaces.join("|");
 394         return namespaces;
 395 }
 396
 397 /** Update results if user hasn't already typed something else */
 398 function os_updateIfRelevant(r, query, text, cacheKey){
 399         var t = document.getElementById(r.searchbox);
 400         if(t != null && t.value == query){ // check if response is still relevant
 401                 os_updateResults(r, query, text, cacheKey);
 402         }
 403         r.query = query;
 404 }
 405
 406 /** Fetch results after some timeout */
 407 function os_delayedFetch(){
 408         if(os_timer == null)
 409                 return;
 410         var r = os_timer.r;
 411         var query = os_timer.query;
 412         os_timer = null;
 413         var path = wgMWSuggestTemplate.replace("{namespaces}",os_getNamespaces(r))
 414                                                                   .replace("{dbname}",wgDBname)
 415                                                                   .replace("{searchTerms}",os_encodeQuery(query));
 416
 417         // try to get from cache, if not fetch using ajax
 418         var cached = os_cache[path];
 419         if(cached != null){
 420                 os_updateIfRelevant(r, query, cached, path);
 421         } else{
 422                 var xmlhttp = sajax_init_object();
 423                 if(xmlhttp){
 424                         try {
 425                                 xmlhttp.open("GET", path, true);
 426                                 xmlhttp.onreadystatechange=function(){
 427                                 if (xmlhttp.readyState==4 && typeof os_updateIfRelevant == 'function') {
 428                                         os_updateIfRelevant(r, query, xmlhttp.responseText, path);
 429                                 }
 430                         };
 431                         xmlhttp.send(null);
 432                 } catch (e) {
 433                                 if (window.location.hostname == "localhost") {
 434                                         alert("Your browser blocks XMLHttpRequest to 'localhost', try using a real hostname for development/testing.");
 435                                 }
 436                                 throw e;
 437                         }
 438                 }
 439         }
 440 }
 441
 442 /** Init timed update via os_delayedUpdate() */
 443 function os_fetchResults(r, query, timeout){
 444         if(query == ""){
 445                 os_hideResults(r);
 446                 return;
 447         } else if(query == r.query)
 448                 return; // no change
 449
 450         os_is_stopped = false; // make sure we're running
 451
 452         /* var cacheKey = wgDBname+":"+query;
 453         var cached = os_cache[cacheKey];
 454         if(cached != null){
 455                 os_updateResults(r,wgDBname,query,cached);
 456                 return;
 457         } */
 458
 459         // cancel any pending fetches
 460         if(os_timer != null && os_timer.id != null)
 461                 clearTimeout(os_timer.id);
 462         // schedule delayed fetching of results
 463         if(timeout != 0){
 464                 os_timer = new os_Timer(setTimeout("os_delayedFetch()",timeout),r,query);
 465         } else{
 466                 os_timer = new os_Timer(null,r,query);
 467                 os_delayedFetch(); // do it now!
 468         }
 469
 470 }
 471 /** Change the highlighted row (i.e. suggestion), from position cur to next */
 472 function os_changeHighlight(r, cur, next, updateSearchBox){
 473         if (next >= r.resultCount)
 474                 next = r.resultCount-1;
 475         if (next < -1)
 476                 next = -1;
 477         r.selected = next;
 478         if (cur == next)
 479         return; // nothing to do.
 480
 481     if(cur >= 0){
 482         var curRow = document.getElementById(r.resultTable + cur);
 483         if(curRow != null)
 484                 curRow.className = "os-suggest-result";
 485     }
 486     var newText;
 487     if(next >= 0){
 488         var nextRow = document.getElementById(r.resultTable + next);
 489         if(nextRow != null)
 490                 nextRow.className = os_HighlightClass();
 491         newText = r.results[next];
 492     } else
 493         newText = r.original;
 494
 495     // adjust the scrollbar if any
 496     if(r.containerCount < r.resultCount){
 497         var c = document.getElementById(r.container);
 498         var vStart = c.scrollTop / r.containerRow;
 499         var vEnd = vStart + r.containerCount;
 500         if(next < vStart)
 501                 c.scrollTop = next * r.containerRow;
 502         else if(next >= vEnd)
 503                 c.scrollTop = (next - r.containerCount + 1) * r.containerRow;
 504     }
 505
 506     // update the contents of the search box
 507     if(updateSearchBox){
 508         os_updateSearchQuery(r,newText);
 509     }
 510 }
 511
 512 function os_HighlightClass() {
 513         var match = navigator.userAgent.match(/AppleWebKit\/(\d+)/);
 514         if (match) {
 515                 var webKitVersion = parseInt(match[1]);
 516                 if (webKitVersion < 523) {
 517                         // CSS system highlight colors broken on old Safari
 518                         // https://bugs.webkit.org/show_bug.cgi?id=6129
 519                         // Safari 3.0.4, 3.1 known ok
 520                         return "os-suggest-result-hl-webkit";
 521                 }
 522         }
 523         return "os-suggest-result-hl";
 524 }
 525
 526 function os_updateSearchQuery(r,newText){
 527         document.getElementById(r.searchbox).value = newText;
 528     r.query = newText;
 529 }
 530
 531 /** Find event target */
 532 function os_getTarget(e){
 533         if (!e) e = window.event;
 534         if (e.target) return e.target;
 535         else if (e.srcElement) return e.srcElement;
 536         else return null;
 537 }
 538
 539
 540
 541 /********************
 542  *  Keyboard events
 543  ********************/
 544
 545 /** Event handler that will fetch results on keyup */
 546 function os_eventKeyup(e){
 547         var targ = os_getTarget(e);
 548         var r = os_map[targ.id];
 549         if(r == null)
 550                 return; // not our event
 551
 552         // some browsers won't generate keypressed for arrow keys, catch it
 553         if(os_keypressed_count == 0){
 554                 os_processKey(r,os_cur_keypressed,targ);
 555         }
 556         var query = targ.value;
 557         os_fetchResults(r,query,os_search_timeout);
 558 }
 559
 560 /** catch arrows up/down and escape to hide the suggestions */
 561 function os_processKey(r,keypressed,targ){
 562         if (keypressed == 40){ // Arrow Down
 563         if (r.visible) {
 564                 os_changeHighlight(r, r.selected, r.selected+1, true);
 565         } else if(os_timer == null){
 566                 // user wants to get suggestions now
 567                 r.query = "";
 568                         os_fetchResults(r,targ.value,0);
 569         }
 570         } else if (keypressed == 38){ // Arrow Up
 571                 if (r.visible){
 572                         os_changeHighlight(r, r.selected, r.selected-1, true);
 573                 }
 574         } else if(keypressed == 27){ // Escape
 575                 document.getElementById(r.searchbox).value = r.original;
 576                 r.query = r.original;
 577                 os_hideResults(r);
 578         } else if(r.query != document.getElementById(r.searchbox).value){
 579                 // os_hideResults(r); // don't show old suggestions
 580         }
 581 }
 582
 583 /** When keys is held down use a timer to output regular events */
 584 function os_eventKeypress(e){
 585         var targ = os_getTarget(e);
 586         var r = os_map[targ.id];
 587         if(r == null)
 588                 return; // not our event
 589
 590         var keypressed = os_cur_keypressed;
 591         if(keypressed == 38 || keypressed == 40){
 592                 var d = new Date()
 593                 var now = d.getTime();
 594                 if(now - os_last_keypress < 120){
 595                         os_last_keypress = now;
 596                         return;
 597                 }
 598         }
 599
 600         os_keypressed_count++;
 601         os_processKey(r,keypressed,targ);
 602 }
 603
 604 /** Catch the key code (Firefox bug)  */
 605 function os_eventKeydown(e){
 606         if (!e) e = window.event;
 607         var targ = os_getTarget(e);
 608         var r = os_map[targ.id];
 609         if(r == null)
 610                 return; // not our event
 611
 612         os_mouse_moved = false;
 613
 614         os_cur_keypressed = (e.keyCode == undefined) ? e.which : e.keyCode;
 615         os_last_keypress = 0;
 616         os_keypressed_count = 0;
 617 }
 618
 619 /** Event: loss of focus of input box */
 620 function os_eventBlur(e){
 621         var targ = os_getTarget(e);
 622         var r = os_map[targ.id];
 623         if(r == null)
 624                 return; // not our event
 625         if(!os_mouse_pressed)
 626                 os_hideResults(r);
 627 }
 628
 629 /** Event: focus (catch only when stopped) */
 630 function os_eventFocus(e){
 631         // nothing happens here?
 632 }
 633
 634
 635
 636 /********************
 637  *  Mouse events
 638  ********************/
 639
 640 /** Mouse over the container */
 641 function os_eventMouseover(srcId, e){
 642         var targ = os_getTarget(e);
 643         var r = os_map[srcId];
 644         if(r == null || !os_mouse_moved)
 645                 return; // not our event
 646         var num = os_getNumberSuffix(targ.id);
 647         if(num >= 0)
 648                 os_changeHighlight(r,r.selected,num,false);
 649
 650 }
 651
 652 /* Get row where the event occured (from its id) */
 653 function os_getNumberSuffix(id){
 654         var num = id.substring(id.length-2);
 655         if( ! (num.charAt(0) >= '0' && num.charAt(0) <= '9') )
 656                 num = num.substring(1);
 657         if(os_isNumber(num))
 658                 return parseInt(num);
 659         else
 660                 return -1;
 661 }
 662
 663 /** Save mouse move as last action */
 664 function os_eventMousemove(srcId, e){
 665         os_mouse_moved = true;
 666 }
 667
 668 /** Mouse button held down, register possible click  */
 669 function os_eventMousedown(srcId, e){
 670         var targ = os_getTarget(e);
 671         var r = os_map[srcId];
 672         if(r == null)
 673                 return; // not our event
 674         var num = os_getNumberSuffix(targ.id);
 675
 676         os_mouse_pressed = true;
 677         if(num >= 0){
 678                 os_mouse_num = num;
 679                 // os_updateSearchQuery(r,r.results[num]);
 680         }
 681         // keep the focus on the search field
 682         document.getElementById(r.searchbox).focus();
 683
 684         return false; // prevents selection
 685 }
 686
 687 /** Mouse button released, check for click on some row */
 688 function os_eventMouseup(srcId, e){
 689         var targ = os_getTarget(e);
 690         var r = os_map[srcId];
 691         if(r == null)
 692                 return; // not our event
 693         var num = os_getNumberSuffix(targ.id);
 694
 695         if(num >= 0 && os_mouse_num == num){
 696                 os_updateSearchQuery(r,r.results[num]);
 697                 os_hideResults(r);
 698                 document.getElementById(r.searchform).submit();
 699         }
 700         os_mouse_pressed = false;
 701         // keep the focus on the search field
 702         document.getElementById(r.searchbox).focus();
 703 }
 704
 705 /** Check if x is a valid integer */
 706 function os_isNumber(x){
 707         if(x == "" || isNaN(x))
 708                 return false;
 709         for(var i=0;i<x.length;i++){
 710                 var c = x.charAt(i);
 711                 if( ! (c >= '0' && c <= '9') )
 712                         return false;
 713         }
 714         return true;
 715 }
 716
 717
 718 /** When the form is submitted hide everything, cancel updates... */
 719 function os_eventOnsubmit(e){
 720         var targ = os_getTarget(e);
 721
 722         os_is_stopped = true;
 723         // kill timed requests
 724         if(os_timer != null && os_timer.id != null){
 725                 clearTimeout(os_timer.id);
 726                 os_timer = null;
 727         }
 728         // Hide all suggestions
 729         for(i=0;i<os_autoload_inputs.length;i++){
 730                 var r = os_map[os_autoload_inputs[i]];
 731                 if(r != null){
 732                         var b = document.getElementById(r.searchform);
 733                         if(b != null && b == targ){
 734                                 // set query value so the handler won't try to fetch additional results
 735                                 r.query = document.getElementById(r.searchbox).value;
 736                         }
 737                         os_hideResults(r);
 738                 }
 739         }
 740         return true;
 741 }
 742
 743 function os_hookEvent(element, hookName, hookFunct) {
 744         if (element.addEventListener) {
 745                 element.addEventListener(hookName, hookFunct, false);
 746         } else if (window.attachEvent) {
 747                 element.attachEvent("on" + hookName, hookFunct);
 748         }
 749 }
 750
 751 /** Init Result objects and event handlers */
 752 function os_initHandlers(name, formname, element){
 753         var r = new os_Results(name, formname);
 754         // event handler
 755         os_hookEvent(element, "keyup", function(event) { os_eventKeyup(event); });
 756         os_hookEvent(element, "keydown", function(event) { os_eventKeydown(event); });
 757         os_hookEvent(element, "keypress", function(event) { os_eventKeypress(event); });
 758         os_hookEvent(element, "blur", function(event) { os_eventBlur(event); });
 759         os_hookEvent(element, "focus", function(event) { os_eventFocus(event); });
 760         element.setAttribute("autocomplete","off");
 761         // stopping handler
 762         os_hookEvent(document.getElementById(formname), "submit", function(event){ return os_eventOnsubmit(event); });
 763         os_map[name] = r;
 764         // toggle link
 765         if(document.getElementById(r.toggle) == null){
 766                 // TODO: disable this while we figure out a way for this to work in all browsers
 767                 /* if(name=='searchInput'){
 768                         // special case: place above the main search box
 769                         var t = os_createToggle(r,"os-suggest-toggle");
 770                         var searchBody = document.getElementById('searchBody');
 771                         var first = searchBody.parentNode.firstChild.nextSibling.appendChild(t);
 772                 } else{
 773                         // default: place below search box to the right
 774                         var t = os_createToggle(r,"os-suggest-toggle-def");
 775                         var top = element.offsetTop + element.offsetHeight;
 776                         var left = element.offsetLeft + element.offsetWidth;
 777                         t.style.position = "absolute";
 778                         t.style.top = top + "px";
 779                         t.style.left = left + "px";
 780                         element.parentNode.appendChild(t);
 781                         // only now width gets calculated, shift right
 782                         left -= t.offsetWidth;
 783                         t.style.left = left + "px";
 784                         t.style.visibility = "visible";
 785                 } */
 786         }
 787
 788 }
 789
 790 /** Return the span element that contains the toggle link */
 791 function os_createToggle(r,className){
 792         var t = document.createElement("span");
 793         t.className = className;
 794         t.setAttribute("id", r.toggle);
 795         var link = document.createElement("a");
 796         link.setAttribute("href","javascript:void(0);");
 797         link.onclick = function(){ os_toggle(r.searchbox,r.searchform) };
 798         var msg = document.createTextNode(wgMWSuggestMessages[0]);
 799         link.appendChild(msg);
 800         t.appendChild(link);
 801         return t;
 802 }
 803
 804 /** Call when user clicks on some of the toggle links */
 805 function os_toggle(inputId,formName){
 806         r = os_map[inputId];
 807         var msg = '';
 808         if(r == null){
 809                 os_enableSuggestionsOn(inputId,formName);
 810                 r = os_map[inputId];
 811                 msg = wgMWSuggestMessages[0];
 812         } else{
 813                 os_disableSuggestionsOn(inputId,formName);
 814                 msg = wgMWSuggestMessages[1];
 815         }
 816         // change message
 817         var link = document.getElementById(r.toggle).firstChild;
 818         link.replaceChild(document.createTextNode(msg),link.firstChild);
 819 }
 820
 821 /** Call this to enable suggestions on input (id=inputId), on a form (name=formName) */
 822 function os_enableSuggestionsOn(inputId, formName){
 823         os_initHandlers( inputId, formName, document.getElementById(inputId) );
 824 }
 825
 826 /** Call this to disable suggestios on input box (id=inputId) */
 827 function os_disableSuggestionsOn(inputId){
 828         r = os_map[inputId];
 829         if(r != null){
 830                 // cancel/hide results
 831                 os_timer = null;
 832                 os_hideResults(r);
 833                 // turn autocomplete on !
 834                 document.getElementById(inputId).setAttribute("autocomplete","on");
 835                 // remove descriptor
 836                 os_map[inputId] = null;
 837         }
 838 }
 839
 840 /** Initialization, call upon page onload */
 841 function os_MWSuggestInit() {
 842         for(i=0;i<os_autoload_inputs.length;i++){
 843                 var id = os_autoload_inputs[i];
 844                 var form = os_autoload_forms[i];
 845                 element = document.getElementById( id );
 846                 if(element != null)
 847                         os_initHandlers(id,form,element);
 848         }
 849 }
 850
 851 hookEvent("load", os_MWSuggestInit);