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