js/util.js

   1 /*
   2  * StatusNet - a distributed open-source microblogging tool
   3  * Copyright (C) 2008, StatusNet, Inc.
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU Affero General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU Affero General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Affero General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * @category  UI interaction
  19  * @package   StatusNet
  20  * @author    Sarven Capadisli <csarven@status.net>
  21  * @author    Evan Prodromou <evan@status.net>
  22  * @author    Brion Vibber <brion@status.net>
  23  * @copyright 2009,2010 StatusNet, Inc.
  24  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  25  * @link      http://status.net/
  26  */
  27
  28 var SN = { // StatusNet
  29     C: { // Config
  30         I: { // Init
  31             CounterBlackout: false,
  32             MaxLength: 140,
  33             PatternUsername: /^[0-9a-zA-Z\-_.]*$/,
  34             HTTP20x30x: [200, 201, 202, 203, 204, 205, 206, 300, 301, 302, 303, 304, 305, 306, 307]
  35         },
  36
  37         /**
  38          * @fixme are these worth the trouble? They seem to mostly just duplicate
  39          * themselves while slightly obscuring the actual selector, so it's hard
  40          * to pop over to the HTML and find something.
  41          *
  42          * In theory, minification could reduce them to shorter variable names,
  43          * but at present that doesn't happen with yui-compressor.
  44          */
  45         S: { // Selector
  46             Disabled: 'disabled',
  47             Warning: 'warning',
  48             Error: 'error',
  49             Success: 'success',
  50             Processing: 'processing',
  51             CommandResult: 'command_result',
  52             FormNotice: 'form_notice',
  53             NoticeDataGeo: 'notice_data-geo',
  54             NoticeDataGeoCookie: 'NoticeDataGeo',
  55             NoticeDataGeoSelected: 'notice_data-geo_selected',
  56             StatusNetInstance:'StatusNetInstance'
  57         }
  58     },
  59
  60     /**
  61      * Map of localized message strings exported to script from the PHP
  62      * side via Action::getScriptMessages().
  63      *
  64      * Retrieve them via SN.msg(); this array is an implementation detail.
  65      *
  66      * @access private
  67      */
  68     messages: {},
  69
  70     /**
  71      * Grabs a localized string that's been previously exported to us
  72      * from server-side code via Action::getScriptMessages().
  73      *
  74      * @example alert(SN.msg('coolplugin-failed'));
  75      *
  76      * @param {String} key: string key name to pull from message index
  77      * @return matching localized message string
  78      */
  79     msg: function(key) {
  80         if (typeof SN.messages[key] == "undefined") {
  81             return '[' + key + ']';
  82         } else {
  83             return SN.messages[key];
  84         }
  85     },
  86
  87     U: { // Utils
  88         /**
  89          * Setup function -- DOES NOT trigger actions immediately.
  90          *
  91          * Sets up event handlers on the new notice form.
  92          *
  93          * @param {jQuery} form: jQuery object whose first matching element is the form
  94          * @access private
  95          */
  96         FormNoticeEnhancements: function(form) {
  97             if (jQuery.data(form[0], 'ElementData') === undefined) {
  98                 MaxLength = form.find('.count').text();
  99                 if (typeof(MaxLength) == 'undefined') {
 100                      MaxLength = SN.C.I.MaxLength;
 101                 }
 102                 jQuery.data(form[0], 'ElementData', {MaxLength:MaxLength});
 103
 104                 SN.U.Counter(form);
 105
 106                 NDT = form.find('[name=status_textarea]');
 107
 108                 NDT.bind('keyup', function(e) {
 109                     SN.U.Counter(form);
 110                 });
 111
 112                 var delayedUpdate= function(e) {
 113                     // Cut and paste events fire *before* the operation,
 114                     // so we need to trigger an update in a little bit.
 115                     // This would be so much easier if the 'change' event
 116                     // actually fired every time the value changed. :P
 117                     window.setTimeout(function() {
 118                         SN.U.Counter(form);
 119                     }, 50);
 120                 };
 121                 // Note there's still no event for mouse-triggered 'delete'.
 122                 NDT.bind('cut', delayedUpdate)
 123                    .bind('paste', delayedUpdate);
 124             }
 125             else {
 126                 form.find('.count').text(jQuery.data(form[0], 'ElementData').MaxLength);
 127             }
 128         },
 129
 130         /**
 131          * To be called from event handlers on the notice import form.
 132          * Triggers an update of the remaining-characters counter.
 133          *
 134          * Additional counter updates will be suppressed during the
 135          * next half-second to avoid flooding the layout engine with
 136          * updates, followed by another automatic check.
 137          *
 138          * The maximum length is pulled from data established by
 139          * FormNoticeEnhancements.
 140          *
 141          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 142          * @access private
 143          */
 144         Counter: function(form) {
 145             SN.C.I.FormNoticeCurrent = form;
 146
 147             var MaxLength = jQuery.data(form[0], 'ElementData').MaxLength;
 148
 149             if (MaxLength <= 0) {
 150                 return;
 151             }
 152
 153             var remaining = MaxLength - SN.U.CharacterCount(form);
 154             var counter = form.find('.count');
 155
 156             if (remaining.toString() != counter.text()) {
 157                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 158                     if (counter.text() != String(remaining)) {
 159                         counter.text(remaining);
 160                     }
 161                     if (remaining < 0) {
 162                         form.addClass(SN.C.S.Warning);
 163                     } else {
 164                         form.removeClass(SN.C.S.Warning);
 165                     }
 166                     // Skip updates for the next 500ms.
 167                     // On slower hardware, updating on every keypress is unpleasant.
 168                     if (!SN.C.I.CounterBlackout) {
 169                         SN.C.I.CounterBlackout = true;
 170                         SN.C.I.FormNoticeCurrent = form;
 171                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 172                     }
 173                 }
 174             }
 175         },
 176
 177         /**
 178          * Pull the count of characters in the current edit field.
 179          * Plugins replacing the edit control may need to override this.
 180          *
 181          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 182          * @return number of chars
 183          */
 184         CharacterCount: function(form) {
 185             return form.find('[name=status_textarea]').val().length;
 186         },
 187
 188         /**
 189          * Called internally after the counter update blackout period expires;
 190          * runs another update to make sure we didn't miss anything.
 191          *
 192          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 193          * @access private
 194          */
 195         ClearCounterBlackout: function(form) {
 196             // Allow keyup events to poke the counter again
 197             SN.C.I.CounterBlackout = false;
 198             // Check if the string changed since we last looked
 199             SN.U.Counter(form);
 200         },
 201
 202         /**
 203          * Helper function to rewrite default HTTP form action URLs to HTTPS
 204          * so we can actually fetch them when on an SSL page in ssl=sometimes
 205          * mode.
 206          *
 207          * It would be better to output URLs that didn't hardcode protocol
 208          * and hostname in the first place...
 209          *
 210          * @param {String} url
 211          * @return string
 212          */
 213         RewriteAjaxAction: function(url) {
 214             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 215             if (document.location.protocol == 'https:' && url.substr(0, 5) == 'http:') {
 216                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 217             } else {
 218                 return url;
 219             }
 220         },
 221
 222         /**
 223          * Grabs form data and submits it asynchronously, with 'ajax=1'
 224          * parameter added to the rest.
 225          *
 226          * If a successful response includes another form, that form
 227          * will be extracted and copied in, replacing the original form.
 228          * If there's no form, the first paragraph will be used.
 229          *
 230          * @fixme can sometimes explode confusingly if returnd data is bogus
 231          * @fixme error handling is pretty vague
 232          * @fixme can't submit file uploads
 233          *
 234          * @param {jQuery} form: jQuery object whose first element is a form
 235          *
 236          * @access public
 237          */
 238         FormXHR: function(form) {
 239             $.ajax({
 240                 type: 'POST',
 241                 dataType: 'xml',
 242                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 243                 data: form.serialize() + '&ajax=1',
 244                 beforeSend: function(xhr) {
 245                     form
 246                         .addClass(SN.C.S.Processing)
 247                         .find('.submit')
 248                             .addClass(SN.C.S.Disabled)
 249                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 250                 },
 251                 error: function (xhr, textStatus, errorThrown) {
 252                     alert(errorThrown || textStatus);
 253                 },
 254                 success: function(data, textStatus) {
 255                     if (typeof($('form', data)[0]) != 'undefined') {
 256                         form_new = document._importNode($('form', data)[0], true);
 257                         form.replaceWith(form_new);
 258                     }
 259                     else {
 260                         form.replaceWith(document._importNode($('p', data)[0], true));
 261                     }
 262                 }
 263             });
 264         },
 265
 266         /**
 267          * Setup function -- DOES NOT trigger actions immediately.
 268          *
 269          * Sets up event handlers for special-cased async submission of the
 270          * notice-posting form, including some pre-post validation.
 271          *
 272          * Unlike FormXHR() this does NOT submit the form immediately!
 273          * It sets up event handlers so that any method of submitting the
 274          * form (click on submit button, enter, submit() etc) will trigger
 275          * it properly.
 276          *
 277          * Also unlike FormXHR(), this system will use a hidden iframe
 278          * automatically to handle file uploads via <input type="file">
 279          * controls.
 280          *
 281          * @fixme tl;dr
 282          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 283          * @fixme error handling is unreliable
 284          * @fixme cookieValue is a global variable, but probably shouldn't be
 285          * @fixme saving the location cache cookies should be split out
 286          * @fixme some error messages are hardcoded english: needs i18n
 287          * @fixme special-case for bookmarklet is confusing and uses a global var "self". Is this ok?
 288          *
 289          * @param {jQuery} form: jQuery object whose first element is a form
 290          *
 291          * @access public
 292          */
 293         FormNoticeXHR: function(form) {
 294             SN.C.I.NoticeDataGeo = {};
 295             form.append('<input type="hidden" name="ajax" value="1"/>');
 296
 297             // Make sure we don't have a mixed HTTP/HTTPS submission...
 298             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 299
 300             /**
 301              * Show a response feedback bit under the new-notice dialog.
 302              *
 303              * @param {String} cls: CSS class name to use ('error' or 'success')
 304              * @param {String} text
 305              * @access private
 306              */
 307             var showFeedback = function(cls, text) {
 308                 form.append(
 309                     $('<p class="form_response"></p>')
 310                         .addClass(cls)
 311                         .text(text)
 312                 );
 313             };
 314
 315             /**
 316              * Hide the previous response feedback, if any.
 317              */
 318             var removeFeedback = function() {
 319                 form.find('.form_response').remove();
 320             };
 321
 322             form.ajaxForm({
 323                 dataType: 'xml',
 324                 timeout: '60000',
 325                 beforeSend: function(formData) {
 326                     if (form.find('[name=status_textarea]').val() == '') {
 327                         form.addClass(SN.C.S.Warning);
 328                         return false;
 329                     }
 330                     form
 331                         .addClass(SN.C.S.Processing)
 332                         .find('.submit')
 333                             .addClass(SN.C.S.Disabled)
 334                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 335
 336                     SN.U.normalizeGeoData(form);
 337
 338                     return true;
 339                 },
 340                 error: function (xhr, textStatus, errorThrown) {
 341                     form
 342                         .removeClass(SN.C.S.Processing)
 343                         .find('.submit')
 344                             .removeClass(SN.C.S.Disabled)
 345                             .removeAttr(SN.C.S.Disabled, SN.C.S.Disabled);
 346                     removeFeedback();
 347                     if (textStatus == 'timeout') {
 348                         // @fixme i18n
 349                         showFeedback('error', 'Sorry! We had trouble sending your notice. The servers are overloaded. Please try again, and contact the site administrator if this problem persists.');
 350                     }
 351                     else {
 352                         var response = SN.U.GetResponseXML(xhr);
 353                         if ($('.'+SN.C.S.Error, response).length > 0) {
 354                             form.append(document._importNode($('.'+SN.C.S.Error, response)[0], true));
 355                         }
 356                         else {
 357                             if (parseInt(xhr.status) === 0 || jQuery.inArray(parseInt(xhr.status), SN.C.I.HTTP20x30x) >= 0) {
 358                                 form
 359                                     .resetForm()
 360                                     .find('.attach-status').remove();
 361                                 SN.U.FormNoticeEnhancements(form);
 362                             }
 363                             else {
 364                                 // @fixme i18n
 365                                 showFeedback('error', '(Sorry! We had trouble sending your notice ('+xhr.status+' '+xhr.statusText+'). Please report the problem to the site administrator if this happens again.');
 366                             }
 367                         }
 368                     }
 369                 },
 370                 success: function(data, textStatus) {
 371                     removeFeedback();
 372                     var errorResult = $('#'+SN.C.S.Error, data);
 373                     if (errorResult.length > 0) {
 374                         showFeedback('error', errorResult.text());
 375                     }
 376                     else {
 377                         if($('body')[0].id == 'bookmarklet') {
 378                             // @fixme self is not referenced anywhere?
 379                             self.close();
 380                         }
 381
 382                         var commandResult = $('#'+SN.C.S.CommandResult, data);
 383                         if (commandResult.length > 0) {
 384                             showFeedback('success', commandResult.text());
 385                         }
 386                         else {
 387                             // New notice post was successful. If on our timeline, show it!
 388                             var notice = document._importNode($('li', data)[0], true);
 389                             var notices = $('#notices_primary .notices:first');
 390                             if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
 391                                 if ($('#'+notice.id).length === 0) {
 392                                     var notice_irt_value = form.find('[name=inreplyto]').val();
 393                                     var notice_irt = '#notices_primary #notice-'+notice_irt_value;
 394                                     if($('body')[0].id == 'conversation') {
 395                                         if(notice_irt_value.length > 0 && $(notice_irt+' .notices').length < 1) {
 396                                             $(notice_irt).append('<ul class="notices"></ul>');
 397                                         }
 398                                         $($(notice_irt+' .notices')[0]).append(notice);
 399                                     }
 400                                     else {
 401                                         notices.prepend(notice);
 402                                     }
 403                                     $('#'+notice.id)
 404                                         .css({display:'none'})
 405                                         .fadeIn(2500);
 406                                     SN.U.NoticeWithAttachment($('#'+notice.id));
 407                                     SN.U.NoticeReplyTo($('#'+notice.id));
 408                                 }
 409                             }
 410                             else {
 411                                 // Not on a timeline that this belongs on?
 412                                 // Just show a success message.
 413                                 showFeedback('success', $('title', data).text());
 414                             }
 415                         }
 416                         form.resetForm();
 417                         form.find('[name=inreplyto]').val('');
 418                         form.find('.attach-status').remove();
 419                         SN.U.FormNoticeEnhancements(form);
 420                     }
 421                 },
 422                 complete: function(xhr, textStatus) {
 423                     form
 424                         .removeClass(SN.C.S.Processing)
 425                         .find('.submit')
 426                             .removeAttr(SN.C.S.Disabled)
 427                             .removeClass(SN.C.S.Disabled);
 428
 429                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 430                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 431                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 432                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 433                     form.find('[name=notice_data-geo]').attr('checked', SN.C.I.NoticeDataGeo.NDG);
 434                 }
 435             });
 436         },
 437
 438         normalizeGeoData: function(form) {
 439             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 440             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 441             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 442             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 443             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked'); // @fixme
 444
 445             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 446
 447             if (cookieValue !== null && cookieValue != 'disabled') {
 448                 cookieValue = JSON.parse(cookieValue);
 449                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 450                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 451                 if (cookieValue.NLNS) {
 452                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 453                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 454                 } else {
 455                     form.find('[name=location_ns]').val('');
 456                     form.find('[name=location_id]').val('');
 457                 }
 458             }
 459             if (cookieValue == 'disabled') {
 460                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', false).attr('checked');
 461             }
 462             else {
 463                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', true).attr('checked');
 464             }
 465
 466         },
 467         /**
 468          * Fetch an XML DOM from an XHR's response data.
 469          *
 470          * Works around unavailable responseXML when document.domain
 471          * has been modified by Meteor or other tools, in some but not
 472          * all browsers.
 473          *
 474          * @param {XMLHTTPRequest} xhr
 475          * @return DOMDocument
 476          */
 477         GetResponseXML: function(xhr) {
 478             try {
 479                 return xhr.responseXML;
 480             } catch (e) {
 481                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 482             }
 483         },
 484
 485         /**
 486          * Setup function -- DOES NOT trigger actions immediately.
 487          *
 488          * Sets up event handlers on all visible notice's reply buttons to
 489          * tweak the new-notice form with needed variables and focus it
 490          * when pushed.
 491          *
 492          * (This replaces the default reply button behavior to submit
 493          * directly to a form which comes back with a specialized page
 494          * with the form data prefilled.)
 495          *
 496          * @access private
 497          */
 498         NoticeReply: function() {
 499             if ($('#content .notice_reply').length > 0) {
 500                 $('#content .notice').each(function() { SN.U.NoticeReplyTo($(this)); });
 501             }
 502         },
 503
 504         /**
 505          * Setup function -- DOES NOT trigger actions immediately.
 506          *
 507          * Sets up event handlers on the given notice's reply button to
 508          * tweak the new-notice form with needed variables and focus it
 509          * when pushed.
 510          *
 511          * (This replaces the default reply button behavior to submit
 512          * directly to a form which comes back with a specialized page
 513          * with the form data prefilled.)
 514          *
 515          * @param {jQuery} notice: jQuery object containing one or more notices
 516          * @access private
 517          */
 518         NoticeReplyTo: function(notice) {
 519             notice.find('.notice_reply').live('click', function(e) {
 520                 e.preventDefault();
 521                 var nickname = ($('.author .nickname', notice).length > 0) ? $($('.author .nickname', notice)[0]) : $('.author .nickname.uid');
 522                 SN.U.NoticeInlineReplyTrigger(notice, '@' + nickname.text());
 523                 return false;
 524             });
 525         },
 526
 527         /**
 528          * Open up a notice's inline reply box.
 529          *
 530          * @param {jQuery} notice: jQuery object containing one notice
 531          * @param {String} initialText
 532          */
 533         NoticeInlineReplyTrigger: function(notice, initialText) {
 534             // Find the notice we're replying to...
 535             var id = $($('.notice_id', notice)[0]).text();
 536             var parentNotice = notice;
 537
 538             // Find the threaded replies view we'll be adding to...
 539             var list = notice.closest('.notices');
 540             if (list.hasClass('threaded-replies')) {
 541                 // We're replying to a reply; use reply form on the end of this list.
 542                 // We'll add our form at the end of this; grab the root notice.
 543                 parentNotice = list.closest('.notice');
 544             } else {
 545                 // We're replying to a parent notice; pull its threaded list
 546                 // and we'll add on the end of it. Will add if needed.
 547                 list = $('ul.threaded-replies', notice);
 548                 if (list.length == 0) {
 549                     list = $('<ul class="notices threaded-replies xoxo"></ul>');
 550                     notice.append(list);
 551                 }
 552             }
 553
 554             // See if the form's already open...
 555             var replyForm = $('.notice-reply-form', list);
 556             if (replyForm.length == 0) {
 557                 // Remove placeholder if any
 558                 $('li.notice-reply-placeholder').remove();
 559
 560                 // Create the reply form entry at the end
 561                 var replyItem = $('li.notice-reply', list);
 562                 if (replyItem.length == 0) {
 563                     replyItem = $('<li class="notice-reply">' +
 564                                       '<form class="notice-reply-form" method="post">' +
 565                                           '<textarea name="status_textarea"></textarea>' +
 566                                           '<div class="controls">' +
 567                                           '<input type="hidden" name="token">' +
 568                                           '<input type="hidden" name="inreplyto">' +
 569                                           '<input type="submit" class="submit">' +
 570                                       '</div>' +
 571                                       '</form>' +
 572                                   '</li>');
 573
 574                     var baseForm = $('#form_notice');
 575                     replyForm = replyItem.find('form');
 576                     replyForm.attr('action', baseForm.attr('action'));
 577                     replyForm.find('input[name="token"]').val(baseForm.find('input[name=token]').val());
 578                     replyForm.find('input[type="submit"]').val(SN.msg('reply_submit'));
 579                     list.append(replyItem);
 580
 581                     replyForm.find('textarea').blur(function() {
 582                         var textarea = $(this);
 583                         var txt = $.trim(textarea.val());
 584                         if (txt == '' || txt == textarea.data('initialText')) {
 585                             // Nothing to say? Begone!
 586                             replyItem.remove();
 587                             if (list.find('li').length > 0) {
 588                                 SN.U.NoticeInlineReplyPlaceholder(parentNotice);
 589                             } else {
 590                                 list.remove();
 591                             }
 592                         }
 593                     });
 594                     replyForm.submit(function(event) {
 595                         var form = replyForm;
 596                         $.ajax({
 597                             type: 'POST',
 598                             dataType: 'xml',
 599                             url: SN.U.RewriteAjaxAction(form.attr('action')),
 600                             data: form.serialize() + '&ajax=1',
 601                             beforeSend: function(xhr) {
 602                                 form
 603                                     .addClass(SN.C.S.Processing)
 604                                     .find('.submit')
 605                                         .addClass(SN.C.S.Disabled)
 606                                         .attr(SN.C.S.Disabled, SN.C.S.Disabled)
 607                                         .end()
 608                                     .find('textarea')
 609                                         .addClass(SN.C.S.Disabled)
 610                                         .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 611                             },
 612                             error: function (xhr, textStatus, errorThrown) {
 613                                 alert(errorThrown || textStatus);
 614                             },
 615                             success: function(data, textStatus) {
 616                                 var orig_li = $('li', data)[0];
 617                                 if (orig_li) {
 618                                     var li = document._importNode(orig_li, true);
 619                                     var id = $(li).attr('id');
 620                                     if ($("#"+id).length == 0) {
 621                                         replyItem.replaceWith(li);
 622                                         SN.U.NoticeInlineReplyPlaceholder(parentNotice);
 623                                     } else {
 624                                         // Realtime came through before us...
 625                                         replyItem.remove();
 626                                     }
 627                                 }
 628                             }
 629                         });
 630                         event.preventDefault();
 631                         return false;
 632                     });
 633                 }
 634             }
 635
 636             // Override...?
 637             replyForm.find('input[name=inreplyto]').val(id);
 638
 639             // Set focus...
 640             var text = replyForm.find('textarea');
 641             if (text.length == 0) {
 642                 throw "No textarea";
 643             }
 644             var replyto = '';
 645             if (initialText) {
 646                 replyto = initialText + ' ';
 647             }
 648             text.val(replyto + text.val().replace(RegExp(replyto, 'i'), ''));
 649             text.data('initialText', $.trim(initialText + ''));
 650             text.focus();
 651             if (text[0].setSelectionRange) {
 652                 var len = text.val().length;
 653                 text[0].setSelectionRange(len,len);
 654             }
 655         },
 656
 657         /**
 658          * Setup function -- DOES NOT apply immediately.
 659          *
 660          * Sets up event handlers for favor/disfavor forms to submit via XHR.
 661          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 662          */
 663         NoticeFavor: function() {
 664             $('.form_favor').live('click', function() { SN.U.FormXHR($(this)); return false; });
 665             $('.form_disfavor').live('click', function() { SN.U.FormXHR($(this)); return false; });
 666         },
 667
 668         NoticeInlineReplyPlaceholder: function(notice) {
 669             var list = notice.find('ul.threaded-replies');
 670             var placeholder = $('<li class="notice-reply-placeholder">' +
 671                                     '<input class="placeholder">' +
 672                                 '</li>');
 673             placeholder.click(function() {
 674                 SN.U.NoticeInlineReplyTrigger(notice);
 675             });
 676             placeholder.find('input').val(SN.msg('reply_placeholder'));
 677             list.append(placeholder);
 678         },
 679
 680         /**
 681          * Setup function -- DOES NOT apply immediately.
 682          *
 683          * Sets up event handlers for favor/disfavor forms to submit via XHR.
 684          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 685          */
 686         NoticeInlineReplySetup: function() {
 687             $('.threaded-replies').each(function() {
 688                 var list = $(this);
 689                 var notice = list.closest('.notice');
 690                 SN.U.NoticeInlineReplyPlaceholder(notice);
 691             });
 692         },
 693
 694         /**
 695          * Setup function -- DOES NOT trigger actions immediately.
 696          *
 697          * Sets up event handlers for repeat forms to toss up a confirmation
 698          * popout before submitting.
 699          *
 700          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 701          */
 702         NoticeRepeat: function() {
 703             $('.form_repeat').live('click', function(e) {
 704                 e.preventDefault();
 705
 706                 SN.U.NoticeRepeatConfirmation($(this));
 707                 return false;
 708             });
 709         },
 710
 711         /**
 712          * Shows a confirmation dialog box variant of the repeat button form.
 713          * This seems to use a technique where the repeat form contains
 714          * _both_ a standalone button _and_ text and buttons for a dialog.
 715          * The dialog will close after its copy of the form is submitted,
 716          * or if you click its 'close' button.
 717          *
 718          * The dialog is created by duplicating the original form and changing
 719          * its style; while clever, this is hard to generalize and probably
 720          * duplicates a lot of unnecessary HTML output.
 721          *
 722          * @fixme create confirmation dialogs through a generalized interface
 723          * that can be reused instead of hardcoded text and styles.
 724          *
 725          * @param {jQuery} form
 726          */
 727         NoticeRepeatConfirmation: function(form) {
 728             var submit_i = form.find('.submit');
 729
 730             var submit = submit_i.clone();
 731             submit
 732                 .addClass('submit_dialogbox')
 733                 .removeClass('submit');
 734             form.append(submit);
 735             submit.bind('click', function() { SN.U.FormXHR(form); return false; });
 736
 737             submit_i.hide();
 738
 739             form
 740                 .addClass('dialogbox')
 741                 .append('<button class="close">&#215;</button>')
 742                 .closest('.notice-options')
 743                     .addClass('opaque');
 744
 745             form.find('button.close').click(function(){
 746                 $(this).remove();
 747
 748                 form
 749                     .removeClass('dialogbox')
 750                     .closest('.notice-options')
 751                         .removeClass('opaque');
 752
 753                 form.find('.submit_dialogbox').remove();
 754                 form.find('.submit').show();
 755
 756                 return false;
 757             });
 758         },
 759
 760         /**
 761          * Setup function -- DOES NOT trigger actions immediately.
 762          *
 763          * Goes through all notices currently displayed and sets up attachment
 764          * handling if needed.
 765          */
 766         NoticeAttachments: function() {
 767             $('.notice a.attachment').each(function() {
 768                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 769             });
 770         },
 771
 772         /**
 773          * Setup function -- DOES NOT trigger actions immediately.
 774          *
 775          * Sets up special attachment link handling if needed. Currently this
 776          * consists only of making the "more" button used for OStatus message
 777          * cropping turn into an auto-expansion button that loads the full
 778          * text from an attachment file.
 779          *
 780          * @param {jQuery} notice
 781          */
 782         NoticeWithAttachment: function(notice) {
 783             if (notice.find('.attachment').length === 0) {
 784                 return;
 785             }
 786
 787             var attachment_more = notice.find('.attachment.more');
 788             if (attachment_more.length > 0) {
 789                 $(attachment_more[0]).click(function() {
 790                     var m = $(this);
 791                     m.addClass(SN.C.S.Processing);
 792                     $.get(m.attr('href')+'/ajax', null, function(data) {
 793                         m.parent('.entry-content').html($(data).find('#attachment_view .entry-content').html());
 794                     });
 795
 796                     return false;
 797                 }).attr('title', SN.msg('showmore_tooltip'));
 798             }
 799         },
 800
 801         /**
 802          * Setup function -- DOES NOT trigger actions immediately.
 803          *
 804          * Sets up event handlers for the file-attachment widget in the
 805          * new notice form. When a file is selected, a box will be added
 806          * below the text input showing the filename and, if supported
 807          * by the browser, a thumbnail preview.
 808          *
 809          * This preview box will also allow removing the attachment
 810          * prior to posting.
 811          *
 812          * @param {jQuery} form
 813          */
 814         NoticeDataAttach: function(form) {
 815             var NDA = form.find('input[type=file]');
 816             NDA.change(function(event) {
 817                 form.find('.attach-status').remove();
 818
 819                 var filename = $(this).val();
 820                 if (!filename) {
 821                     // No file -- we've been tricked!
 822                     return false;
 823                 }
 824
 825                 var attachStatus = $('<div class="attach-status '+SN.C.S.Success+'"><code></code> <button class="close">&#215;</button></div>');
 826                 attachStatus.find('code').text(filename);
 827                 attachStatus.find('button').click(function(){
 828                     attachStatus.remove();
 829                     NDA.val('');
 830
 831                     return false;
 832                 });
 833                 form.append(attachStatus);
 834
 835                 if (typeof this.files == "object") {
 836                     // Some newer browsers will let us fetch the files for preview.
 837                     for (var i = 0; i < this.files.length; i++) {
 838                         SN.U.PreviewAttach(form, this.files[i]);
 839                     }
 840                 }
 841             });
 842         },
 843
 844         /**
 845          * Get PHP's MAX_FILE_SIZE setting for this form;
 846          * used to apply client-side file size limit checks.
 847          *
 848          * @param {jQuery} form
 849          * @return int max size in bytes; 0 or negative means no limit
 850          */
 851         maxFileSize: function(form) {
 852             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 853             if (max) {
 854                 return parseInt(max);
 855             } else {
 856                 return 0;
 857             }
 858         },
 859
 860         /**
 861          * For browsers with FileAPI support: make a thumbnail if possible,
 862          * and append it into the attachment display widget.
 863          *
 864          * Known good:
 865          * - Firefox 3.6.6, 4.0b7
 866          * - Chrome 8.0.552.210
 867          *
 868          * Known ok metadata, can't get contents:
 869          * - Safari 5.0.2
 870          *
 871          * Known fail:
 872          * - Opera 10.63, 11 beta (no input.files interface)
 873          *
 874          * @param {jQuery} form
 875          * @param {File} file
 876          *
 877          * @todo use configured thumbnail size
 878          * @todo detect pixel size?
 879          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 880          */
 881         PreviewAttach: function(form, file) {
 882             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 883             var preview = true;
 884
 885             var blobAsDataURL;
 886             if (typeof window.createObjectURL != "undefined") {
 887                 /**
 888                  * createObjectURL lets us reference the file directly from an <img>
 889                  * This produces a compact URL with an opaque reference to the file,
 890                  * which we can reference immediately.
 891                  *
 892                  * - Firefox 3.6.6: no
 893                  * - Firefox 4.0b7: no
 894                  * - Safari 5.0.2: no
 895                  * - Chrome 8.0.552.210: works!
 896                  */
 897                 blobAsDataURL = function(blob, callback) {
 898                     callback(window.createObjectURL(blob));
 899                 }
 900             } else if (typeof window.FileReader != "undefined") {
 901                 /**
 902                  * FileAPI's FileReader can build a data URL from a blob's contents,
 903                  * but it must read the file and build it asynchronously. This means
 904                  * we'll be passing a giant data URL around, which may be inefficient.
 905                  *
 906                  * - Firefox 3.6.6: works!
 907                  * - Firefox 4.0b7: works!
 908                  * - Safari 5.0.2: no
 909                  * - Chrome 8.0.552.210: works!
 910                  */
 911                 blobAsDataURL = function(blob, callback) {
 912                     var reader = new FileReader();
 913                     reader.onload = function(event) {
 914                         callback(reader.result);
 915                     }
 916                     reader.readAsDataURL(blob);
 917                 }
 918             } else {
 919                 preview = false;
 920             }
 921
 922             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 923             if ($.inArray(file.type, imageTypes) == -1) {
 924                 // We probably don't know how to show the file.
 925                 preview = false;
 926             }
 927
 928             var maxSize = 8 * 1024 * 1024;
 929             if (file.size > maxSize) {
 930                 // Don't kill the browser trying to load some giant image.
 931                 preview = false;
 932             }
 933
 934             if (preview) {
 935                 blobAsDataURL(file, function(url) {
 936                     var img = $('<img>')
 937                         .attr('title', tooltip)
 938                         .attr('alt', tooltip)
 939                         .attr('src', url)
 940                         .attr('style', 'height: 120px');
 941                     form.find('.attach-status').append(img);
 942                 });
 943             } else {
 944                 var img = $('<div></div>').text(tooltip);
 945                 form.find('.attach-status').append(img);
 946             }
 947         },
 948
 949         /**
 950          * Setup function -- DOES NOT trigger actions immediately.
 951          *
 952          * Initializes state for the location-lookup features in the
 953          * new-notice form. Seems to set up some event handlers for
 954          * triggering lookups and using the new values.
 955          *
 956          * @param {jQuery} form
 957          *
 958          * @fixme tl;dr
 959          * @fixme there's not good visual state update here, so users have a
 960          *        hard time figuring out if it's working or fixing if it's wrong.
 961          *
 962          */
 963         NoticeLocationAttach: function(form) {
 964             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
 965             var NLat = form.find('[name=lat]')
 966             var NLon = form.find('[name=lon]')
 967             var NLNS = form.find('[name=location_ns]').val();
 968             var NLID = form.find('[name=location_id]').val();
 969             var NLN = ''; // @fixme
 970             var NDGe = form.find('[name=notice_data-geo]');
 971             var check = form.find('[name=notice_data-geo]');
 972             var label = $('label[for='+check.attr('id')+']');
 973
 974             function removeNoticeDataGeo(error) {
 975                 label
 976                     .attr('title', jQuery.trim(label.text()))
 977                     .removeClass('checked');
 978
 979                 form.find('[name=lat]').val('');
 980                 form.find('[name=lon]').val('');
 981                 form.find('[name=location_ns]').val('');
 982                 form.find('[name=location_id]').val('');
 983                 form.find('[name=notice_data-geo]').attr('checked', false);
 984
 985                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
 986
 987                 if (error) {
 988                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
 989                     form.find('.geo_status_wrapper .geo_status').text(error);
 990                 } else {
 991                     form.find('.geo_status_wrapper').remove();
 992                 }
 993             }
 994
 995             function getJSONgeocodeURL(geocodeURL, data) {
 996                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
 997                 $.getJSON(geocodeURL, data, function(location) {
 998                     var lns, lid;
 999
1000                     if (typeof(location.location_ns) != 'undefined') {
1001                         form.find('[name=location_ns]').val(location.location_ns);
1002                         lns = location.location_ns;
1003                     }
1004
1005                     if (typeof(location.location_id) != 'undefined') {
1006                         form.find('[name=location_id]').val(location.location_id);
1007                         lid = location.location_id;
1008                     }
1009
1010                     if (typeof(location.name) == 'undefined') {
1011                         NLN_text = data.lat + ';' + data.lon;
1012                     }
1013                     else {
1014                         NLN_text = location.name;
1015                     }
1016
1017                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1018                     label
1019                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1020
1021                     form.find('[name=lat]').val(data.lat);
1022                     form.find('[name=lon]').val(data.lon);
1023                     form.find('[name=location_ns]').val(lns);
1024                     form.find('[name=location_id]').val(lid);
1025                     form.find('[name=notice_data-geo]').attr('checked', true);
1026
1027                     var cookieValue = {
1028                         NLat: data.lat,
1029                         NLon: data.lon,
1030                         NLNS: lns,
1031                         NLID: lid,
1032                         NLN: NLN_text,
1033                         NLNU: location.url,
1034                         NDG: true
1035                     };
1036
1037                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1038                 });
1039             }
1040
1041             if (check.length > 0) {
1042                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1043                     check.attr('checked', false);
1044                 }
1045                 else {
1046                     check.attr('checked', true);
1047                 }
1048
1049                 var NGW = form.find('.notice_data-geo_wrap');
1050                 var geocodeURL = NGW.attr('title');
1051                 NGW.removeAttr('title');
1052
1053                 label
1054                     .attr('title', label.text());
1055
1056                 check.change(function() {
1057                     if (check.attr('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1058                         label
1059                             .attr('title', NoticeDataGeo_text.ShareDisable)
1060                             .addClass('checked');
1061
1062                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1063                             if (navigator.geolocation) {
1064                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1065                                 navigator.geolocation.getCurrentPosition(
1066                                     function(position) {
1067                                         form.find('[name=lat]').val(position.coords.latitude);
1068                                         form.find('[name=lon]').val(position.coords.longitude);
1069
1070                                         var data = {
1071                                             lat: position.coords.latitude,
1072                                             lon: position.coords.longitude,
1073                                             token: $('#token').val()
1074                                         };
1075
1076                                         getJSONgeocodeURL(geocodeURL, data);
1077                                     },
1078
1079                                     function(error) {
1080                                         switch(error.code) {
1081                                             case error.PERMISSION_DENIED:
1082                                                 removeNoticeDataGeo('Location permission denied.');
1083                                                 break;
1084                                             case error.TIMEOUT:
1085                                                 //$('#'+SN.C.S.NoticeDataGeo).attr('checked', false);
1086                                                 removeNoticeDataGeo('Location lookup timeout.');
1087                                                 break;
1088                                         }
1089                                     },
1090
1091                                     {
1092                                         timeout: 10000
1093                                     }
1094                                 );
1095                             }
1096                             else {
1097                                 if (NLat.length > 0 && NLon.length > 0) {
1098                                     var data = {
1099                                         lat: NLat,
1100                                         lon: NLon,
1101                                         token: $('#token').val()
1102                                     };
1103
1104                                     getJSONgeocodeURL(geocodeURL, data);
1105                                 }
1106                                 else {
1107                                     removeNoticeDataGeo();
1108                                     check.remove();
1109                                     label.remove();
1110                                 }
1111                             }
1112                         }
1113                         else {
1114                             var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1115
1116                             form.find('[name=lat]').val(cookieValue.NLat);
1117                             form.find('[name=lon]').val(cookieValue.NLon);
1118                             form.find('[name=location_ns]').val(cookieValue.NLNS);
1119                             form.find('[name=location_id]').val(cookieValue.NLID);
1120                             form.find('[name=notice_data-geo]').attr('checked', cookieValue.NDG);
1121
1122                             SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1123                             label
1124                                 .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1125                                 .addClass('checked');
1126                         }
1127                     }
1128                     else {
1129                         removeNoticeDataGeo();
1130                     }
1131                 }).change();
1132             }
1133         },
1134
1135         /**
1136          * Create or update a geolocation status widget in this notice posting form.
1137          *
1138          * @param {jQuery} form
1139          * @param {String} status
1140          * @param {String} lat (optional)
1141          * @param {String} lon (optional)
1142          * @param {String} url (optional)
1143          */
1144         NoticeGeoStatus: function(form, status, lat, lon, url)
1145         {
1146             var form = $('#form_notice');
1147             var wrapper = form.find('.geo_status_wrapper');
1148             if (wrapper.length == 0) {
1149                 wrapper = $('<div class="'+SN.C.S.Success+' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1150                 wrapper.find('button.close').click(function() {
1151                     form.find('[name=notice_data-geo]').removeAttr('checked').change();
1152                 });
1153                 form.append(wrapper);
1154             }
1155             var label;
1156             if (url) {
1157                 label = $('<a></a>').attr('href', url);
1158             } else {
1159                 label = $('<span></span>');
1160             }
1161             label.text(status);
1162             if (lat || lon) {
1163                 var latlon = lat + ';' + lon;
1164                 label.attr('title', latlon);
1165                 if (!status) {
1166                     label.text(latlon)
1167                 }
1168             }
1169             wrapper.find('.geo_status').empty().append(label);
1170         },
1171
1172         /**
1173          * Setup function -- DOES NOT trigger actions immediately.
1174          *
1175          * Initializes event handlers for the "Send direct message" link on
1176          * profile pages, setting it up to display a dialog box when clicked.
1177          *
1178          * Unlike the repeat confirmation form, this appears to fetch
1179          * the form _from the original link target_, so the form itself
1180          * doesn't need to be in the current document.
1181          *
1182          * @fixme breaks ability to open link in new window?
1183          */
1184         NewDirectMessage: function() {
1185             NDM = $('.entity_send-a-message a');
1186             NDM.attr({'href':NDM.attr('href')+'&ajax=1'});
1187             NDM.bind('click', function() {
1188                 var NDMF = $('.entity_send-a-message form');
1189                 if (NDMF.length === 0) {
1190                     $(this).addClass(SN.C.S.Processing);
1191                     $.get(NDM.attr('href'), null, function(data) {
1192                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1193                         NDMF = $('.entity_send-a-message .form_notice');
1194                         SN.U.FormNoticeXHR(NDMF);
1195                         SN.U.FormNoticeEnhancements(NDMF);
1196                         NDMF.append('<button class="close">&#215;</button>');
1197                         $('.entity_send-a-message button').click(function(){
1198                             NDMF.hide();
1199                             return false;
1200                         });
1201                         NDM.removeClass(SN.C.S.Processing);
1202                     });
1203                 }
1204                 else {
1205                     NDMF.show();
1206                     $('.entity_send-a-message textarea').focus();
1207                 }
1208                 return false;
1209             });
1210         },
1211
1212         /**
1213          * Return a date object with the current local time on the
1214          * given year, month, and day.
1215          *
1216          * @param {number} year: 4-digit year
1217          * @param {number} month: 0 == January
1218          * @param {number} day: 1 == 1
1219          * @return {Date}
1220          */
1221         GetFullYear: function(year, month, day) {
1222             var date = new Date();
1223             date.setFullYear(year, month, day);
1224
1225             return date;
1226         },
1227
1228         /**
1229          * Some sort of object interface for storing some structured
1230          * information in a cookie.
1231          *
1232          * Appears to be used to save the last-used login nickname?
1233          * That's something that browsers usually take care of for us
1234          * these days, do we really need to do it? Does anything else
1235          * use this interface?
1236          *
1237          * @fixme what is this?
1238          * @fixme should this use non-cookie local storage when available?
1239          */
1240         StatusNetInstance: {
1241             /**
1242              * @fixme what is this?
1243              */
1244             Set: function(value) {
1245                 var SNI = SN.U.StatusNetInstance.Get();
1246                 if (SNI !== null) {
1247                     value = $.extend(SNI, value);
1248                 }
1249
1250                 $.cookie(
1251                     SN.C.S.StatusNetInstance,
1252                     JSON.stringify(value),
1253                     {
1254                         path: '/',
1255                         expires: SN.U.GetFullYear(2029, 0, 1)
1256                     });
1257             },
1258
1259             /**
1260              * @fixme what is this?
1261              */
1262             Get: function() {
1263                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1264                 if (cookieValue !== null) {
1265                     return JSON.parse(cookieValue);
1266                 }
1267                 return null;
1268             },
1269
1270             /**
1271              * @fixme what is this?
1272              */
1273             Delete: function() {
1274                 $.cookie(SN.C.S.StatusNetInstance, null);
1275             }
1276         },
1277
1278         /**
1279          * Check if the current page is a timeline where the current user's
1280          * posts should be displayed immediately on success.
1281          *
1282          * @fixme this should be done in a saner way, with machine-readable
1283          * info about what page we're looking at.
1284          *
1285          * @param {DOMElement} notice: HTML chunk with formatted notice
1286          * @return boolean
1287          */
1288         belongsOnTimeline: function(notice) {
1289             var action = $("body").attr('id');
1290             if (action == 'public') {
1291                 return true;
1292             }
1293
1294             var profileLink = $('#nav_profile a').attr('href');
1295             if (profileLink) {
1296                 var authorUrl = $(notice).find('.entry-title .author a.url').attr('href');
1297                 if (authorUrl == profileLink) {
1298                     if (action == 'all' || action == 'showstream') {
1299                         // Posts always show on your own friends and profile streams.
1300                         return true;
1301                     }
1302                 }
1303             }
1304
1305             // @fixme tag, group, reply timelines should be feasible as well.
1306             // Mismatch between id-based and name-based user/group links currently complicates
1307             // the lookup, since all our inline mentions contain the absolute links but the
1308             // UI links currently on the page use malleable names.
1309
1310             return false;
1311         }
1312     },
1313
1314     Init: {
1315         /**
1316          * If user is logged in, run setup code for the new notice form:
1317          *
1318          *  - char counter
1319          *  - AJAX submission
1320          *  - location events
1321          *  - file upload events
1322          */
1323         NoticeForm: function() {
1324             if ($('body.user_in').length > 0) {
1325                 $('.'+SN.C.S.FormNotice).each(function() {
1326                     var form = $(this);
1327                     SN.U.NoticeLocationAttach(form);
1328                     SN.U.FormNoticeXHR(form);
1329                     SN.U.FormNoticeEnhancements(form);
1330                     SN.U.NoticeDataAttach(form);
1331                 });
1332             }
1333         },
1334
1335         /**
1336          * Run setup code for notice timeline views items:
1337          *
1338          * - AJAX submission for fave/repeat/reply (if logged in)
1339          * - Attachment link extras ('more' links)
1340          */
1341         Notices: function() {
1342             if ($('body.user_in').length > 0) {
1343                 SN.U.NoticeFavor();
1344                 SN.U.NoticeRepeat();
1345                 SN.U.NoticeReply();
1346                 SN.U.NoticeInlineReplySetup();
1347             }
1348
1349             SN.U.NoticeAttachments();
1350         },
1351
1352         /**
1353          * Run setup code for user & group profile page header area if logged in:
1354          *
1355          * - AJAX submission for sub/unsub/join/leave/nudge
1356          * - AJAX form popup for direct-message
1357          */
1358         EntityActions: function() {
1359             if ($('body.user_in').length > 0) {
1360                 $('.form_user_subscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1361                 $('.form_user_unsubscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1362                 $('.form_group_join').live('click', function() { SN.U.FormXHR($(this)); return false; });
1363                 $('.form_group_leave').live('click', function() { SN.U.FormXHR($(this)); return false; });
1364                 $('.form_user_nudge').live('click', function() { SN.U.FormXHR($(this)); return false; });
1365
1366                 SN.U.NewDirectMessage();
1367             }
1368         },
1369
1370         /**
1371          * Run setup code for login form:
1372          *
1373          * - loads saved last-used-nickname from cookie
1374          * - sets event handler to save nickname to cookie on submit
1375          *
1376          * @fixme is this necessary? Browsers do their own form saving these days.
1377          */
1378         Login: function() {
1379             if (SN.U.StatusNetInstance.Get() !== null) {
1380                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1381                 if (nickname !== null) {
1382                     $('#form_login #nickname').val(nickname);
1383                 }
1384             }
1385
1386             $('#form_login').bind('submit', function() {
1387                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1388                 return true;
1389             });
1390         },
1391
1392         /**
1393          * Add logic to any file upload forms to handle file size limits,
1394          * on browsers that support basic FileAPI.
1395          */
1396         UploadForms: function () {
1397             $('input[type=file]').change(function(event) {
1398                 if (typeof this.files == "object" && this.files.length > 0) {
1399                     var size = 0;
1400                     for (var i = 0; i < this.files.length; i++) {
1401                         size += this.files[i].size;
1402                     }
1403
1404                     var max = SN.U.maxFileSize($(this.form));
1405                     if (max > 0 && size > max) {
1406                         var msg = 'File too large: maximum upload size is %d bytes.';
1407                         alert(msg.replace('%d', max));
1408
1409                         // Clear the files.
1410                         $(this).val('');
1411                         event.preventDefault();
1412                         return false;
1413                     }
1414                 }
1415             });
1416         }
1417     }
1418 };
1419
1420 /**
1421  * Run initialization functions on DOM-ready.
1422  *
1423  * Note that if we're waiting on other scripts to load, this won't happen
1424  * until that's done. To load scripts asynchronously without delaying setup,
1425  * don't start them loading until after DOM-ready time!
1426  */
1427 $(document).ready(function(){
1428     SN.Init.UploadForms();
1429     if ($('.'+SN.C.S.FormNotice).length > 0) {
1430         SN.Init.NoticeForm();
1431     }
1432     if ($('#content .notices').length > 0) {
1433         SN.Init.Notices();
1434     }
1435     if ($('#content .entity_actions').length > 0) {
1436         SN.Init.EntityActions();
1437     }
1438     if ($('#form_login').length > 0) {
1439         SN.Init.Login();
1440     }
1441 });