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             NoticeInReplyTo: 'notice_in-reply-to',
  54             NoticeLat: 'notice_data-lat',
  55             NoticeLon: 'notice_data-lon',
  56             NoticeLocationId: 'notice_data-location_id',
  57             NoticeLocationNs: 'notice_data-location_ns',
  58             NoticeGeoName: 'notice_data-geo_name',
  59             NoticeDataGeo: 'notice_data-geo',
  60             NoticeDataGeoCookie: 'NoticeDataGeo',
  61             NoticeDataGeoSelected: 'notice_data-geo_selected',
  62             StatusNetInstance:'StatusNetInstance'
  63         }
  64     },
  65
  66     /**
  67      * Map of localized message strings exported to script from the PHP
  68      * side via Action::getScriptMessages().
  69      *
  70      * Retrieve them via SN.msg(); this array is an implementation detail.
  71      *
  72      * @access private
  73      */
  74     messages: {},
  75
  76     /**
  77      * Grabs a localized string that's been previously exported to us
  78      * from server-side code via Action::getScriptMessages().
  79      *
  80      * @example alert(SN.msg('coolplugin-failed'));
  81      *
  82      * @param {String} key: string key name to pull from message index
  83      * @return matching localized message string
  84      */
  85     msg: function(key) {
  86         if (typeof SN.messages[key] == "undefined") {
  87             return '[' + key + ']';
  88         } else {
  89             return SN.messages[key];
  90         }
  91     },
  92
  93     U: { // Utils
  94         /**
  95          * Setup function -- DOES NOT trigger actions immediately.
  96          *
  97          * Sets up event handlers on the new notice form.
  98          *
  99          * @param {jQuery} form: jQuery object whose first matching element is the form
 100          * @access private
 101          */
 102         FormNoticeEnhancements: function(form) {
 103             if (jQuery.data(form[0], 'ElementData') === undefined) {
 104                 MaxLength = form.find('.count').text();
 105                 if (typeof(MaxLength) == 'undefined') {
 106                      MaxLength = SN.C.I.MaxLength;
 107                 }
 108                 jQuery.data(form[0], 'ElementData', {MaxLength:MaxLength});
 109
 110                 SN.U.Counter(form);
 111
 112                 NDT = form.find('[name=status_textarea]');
 113
 114                 NDT.bind('keyup', function(e) {
 115                     SN.U.Counter(form);
 116                 });
 117
 118                 var delayedUpdate= function(e) {
 119                     // Cut and paste events fire *before* the operation,
 120                     // so we need to trigger an update in a little bit.
 121                     // This would be so much easier if the 'change' event
 122                     // actually fired every time the value changed. :P
 123                     window.setTimeout(function() {
 124                         SN.U.Counter(form);
 125                     }, 50);
 126                 };
 127                 // Note there's still no event for mouse-triggered 'delete'.
 128                 NDT.bind('cut', delayedUpdate)
 129                    .bind('paste', delayedUpdate);
 130             }
 131             else {
 132                 form.find('.count').text(jQuery.data(form[0], 'ElementData').MaxLength);
 133             }
 134         },
 135
 136         /**
 137          * To be called from event handlers on the notice import form.
 138          * Triggers an update of the remaining-characters counter.
 139          *
 140          * Additional counter updates will be suppressed during the
 141          * next half-second to avoid flooding the layout engine with
 142          * updates, followed by another automatic check.
 143          *
 144          * The maximum length is pulled from data established by
 145          * FormNoticeEnhancements.
 146          *
 147          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 148          * @access private
 149          */
 150         Counter: function(form) {
 151             SN.C.I.FormNoticeCurrent = form;
 152
 153             var MaxLength = jQuery.data(form[0], 'ElementData').MaxLength;
 154
 155             if (MaxLength <= 0) {
 156                 return;
 157             }
 158
 159             var remaining = MaxLength - SN.U.CharacterCount(form);
 160             var counter = form.find('.count');
 161
 162             if (remaining.toString() != counter.text()) {
 163                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 164                     if (counter.text() != String(remaining)) {
 165                         counter.text(remaining);
 166                     }
 167                     if (remaining < 0) {
 168                         form.addClass(SN.C.S.Warning);
 169                     } else {
 170                         form.removeClass(SN.C.S.Warning);
 171                     }
 172                     // Skip updates for the next 500ms.
 173                     // On slower hardware, updating on every keypress is unpleasant.
 174                     if (!SN.C.I.CounterBlackout) {
 175                         SN.C.I.CounterBlackout = true;
 176                         SN.C.I.FormNoticeCurrent = form;
 177                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 178                     }
 179                 }
 180             }
 181         },
 182
 183         /**
 184          * Pull the count of characters in the current edit field.
 185          * Plugins replacing the edit control may need to override this.
 186          *
 187          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 188          * @return number of chars
 189          */
 190         CharacterCount: function(form) {
 191             return form.find('[name=status_textarea]').val().length;
 192         },
 193
 194         /**
 195          * Called internally after the counter update blackout period expires;
 196          * runs another update to make sure we didn't miss anything.
 197          *
 198          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 199          * @access private
 200          */
 201         ClearCounterBlackout: function(form) {
 202             // Allow keyup events to poke the counter again
 203             SN.C.I.CounterBlackout = false;
 204             // Check if the string changed since we last looked
 205             SN.U.Counter(form);
 206         },
 207
 208         /**
 209          * Helper function to rewrite default HTTP form action URLs to HTTPS
 210          * so we can actually fetch them when on an SSL page in ssl=sometimes
 211          * mode.
 212          *
 213          * It would be better to output URLs that didn't hardcode protocol
 214          * and hostname in the first place...
 215          *
 216          * @param {String} url
 217          * @return string
 218          */
 219         RewriteAjaxAction: function(url) {
 220             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 221             if (document.location.protocol == 'https:' && url.substr(0, 5) == 'http:') {
 222                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 223             } else {
 224                 return url;
 225             }
 226         },
 227
 228         /**
 229          * Grabs form data and submits it asynchronously, with 'ajax=1'
 230          * parameter added to the rest.
 231          *
 232          * If a successful response includes another form, that form
 233          * will be extracted and copied in, replacing the original form.
 234          * If there's no form, the first paragraph will be used.
 235          *
 236          * @fixme can sometimes explode confusingly if returnd data is bogus
 237          * @fixme error handling is pretty vague
 238          * @fixme can't submit file uploads
 239          *
 240          * @param {jQuery} form: jQuery object whose first element is a form
 241          *
 242          * @access public
 243          */
 244         FormXHR: function(form) {
 245             $.ajax({
 246                 type: 'POST',
 247                 dataType: 'xml',
 248                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 249                 data: form.serialize() + '&ajax=1',
 250                 beforeSend: function(xhr) {
 251                     form
 252                         .addClass(SN.C.S.Processing)
 253                         .find('.submit')
 254                             .addClass(SN.C.S.Disabled)
 255                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 256                 },
 257                 error: function (xhr, textStatus, errorThrown) {
 258                     alert(errorThrown || textStatus);
 259                 },
 260                 success: function(data, textStatus) {
 261                     if (typeof($('form', data)[0]) != 'undefined') {
 262                         form_new = document._importNode($('form', data)[0], true);
 263                         form.replaceWith(form_new);
 264                     }
 265                     else {
 266                         form.replaceWith(document._importNode($('p', data)[0], true));
 267                     }
 268                 }
 269             });
 270         },
 271
 272         /**
 273          * Setup function -- DOES NOT trigger actions immediately.
 274          *
 275          * Sets up event handlers for special-cased async submission of the
 276          * notice-posting form, including some pre-post validation.
 277          *
 278          * Unlike FormXHR() this does NOT submit the form immediately!
 279          * It sets up event handlers so that any method of submitting the
 280          * form (click on submit button, enter, submit() etc) will trigger
 281          * it properly.
 282          *
 283          * Also unlike FormXHR(), this system will use a hidden iframe
 284          * automatically to handle file uploads via <input type="file">
 285          * controls.
 286          *
 287          * @fixme tl;dr
 288          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 289          * @fixme error handling is unreliable
 290          * @fixme cookieValue is a global variable, but probably shouldn't be
 291          * @fixme saving the location cache cookies should be split out
 292          * @fixme some error messages are hardcoded english: needs i18n
 293          * @fixme special-case for bookmarklet is confusing and uses a global var "self". Is this ok?
 294          *
 295          * @param {jQuery} form: jQuery object whose first element is a form
 296          *
 297          * @access public
 298          */
 299         FormNoticeXHR: function(form) {
 300             SN.C.I.NoticeDataGeo = {};
 301             form.append('<input type="hidden" name="ajax" value="1"/>');
 302
 303             // Make sure we don't have a mixed HTTP/HTTPS submission...
 304             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 305
 306             /**
 307              * Show a response feedback bit under the new-notice dialog.
 308              *
 309              * @param {String} cls: CSS class name to use ('error' or 'success')
 310              * @param {String} text
 311              * @access private
 312              */
 313             var showFeedback = function(cls, text) {
 314                 form.append(
 315                     $('<p class="form_response"></p>')
 316                         .addClass(cls)
 317                         .text(text)
 318                 );
 319             };
 320
 321             /**
 322              * Hide the previous response feedback, if any.
 323              */
 324             var removeFeedback = function() {
 325                 form.find('.form_response').remove();
 326             };
 327
 328             form.ajaxForm({
 329                 dataType: 'xml',
 330                 timeout: '60000',
 331                 beforeSend: function(formData) {
 332                     if (form.find('[name=status_textarea]').val() == '') {
 333                         form.addClass(SN.C.S.Warning);
 334                         return false;
 335                     }
 336                     form
 337                         .addClass(SN.C.S.Processing)
 338                         .find('.submit')
 339                             .addClass(SN.C.S.Disabled)
 340                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 341
 342                     SN.U.normalizeGeoData(form);
 343
 344                     return true;
 345                 },
 346                 error: function (xhr, textStatus, errorThrown) {
 347                     form
 348                         .removeClass(SN.C.S.Processing)
 349                         .find('.submit')
 350                             .removeClass(SN.C.S.Disabled)
 351                             .removeAttr(SN.C.S.Disabled, SN.C.S.Disabled);
 352                     removeFeedback();
 353                     if (textStatus == 'timeout') {
 354                         // @fixme i18n
 355                         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.');
 356                     }
 357                     else {
 358                         var response = SN.U.GetResponseXML(xhr);
 359                         if ($('.'+SN.C.S.Error, response).length > 0) {
 360                             form.append(document._importNode($('.'+SN.C.S.Error, response)[0], true));
 361                         }
 362                         else {
 363                             if (parseInt(xhr.status) === 0 || jQuery.inArray(parseInt(xhr.status), SN.C.I.HTTP20x30x) >= 0) {
 364                                 form
 365                                     .resetForm()
 366                                     .find('.attach-status').remove();
 367                                 SN.U.FormNoticeEnhancements(form);
 368                             }
 369                             else {
 370                                 // @fixme i18n
 371                                 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.');
 372                             }
 373                         }
 374                     }
 375                 },
 376                 success: function(data, textStatus) {
 377                     removeFeedback();
 378                     var errorResult = $('#'+SN.C.S.Error, data);
 379                     if (errorResult.length > 0) {
 380                         showFeedback('error', errorResult.text());
 381                     }
 382                     else {
 383                         if($('body')[0].id == 'bookmarklet') {
 384                             // @fixme self is not referenced anywhere?
 385                             self.close();
 386                         }
 387
 388                         var commandResult = $('#'+SN.C.S.CommandResult, data);
 389                         if (commandResult.length > 0) {
 390                             showFeedback('success', commandResult.text());
 391                         }
 392                         else {
 393                             // New notice post was successful. If on our timeline, show it!
 394                             var notice = document._importNode($('li', data)[0], true);
 395                             var notices = $('#notices_primary .notices:first');
 396                             if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
 397                                 if ($('#'+notice.id).length === 0) {
 398                                     var notice_irt_value = $('#'+SN.C.S.NoticeInReplyTo).val();
 399                                     var notice_irt = '#notices_primary #notice-'+notice_irt_value;
 400                                     if($('body')[0].id == 'conversation') {
 401                                         if(notice_irt_value.length > 0 && $(notice_irt+' .notices').length < 1) {
 402                                             $(notice_irt).append('<ul class="notices"></ul>');
 403                                         }
 404                                         $($(notice_irt+' .notices')[0]).append(notice);
 405                                     }
 406                                     else {
 407                                         notices.prepend(notice);
 408                                     }
 409                                     $('#'+notice.id)
 410                                         .css({display:'none'})
 411                                         .fadeIn(2500);
 412                                     SN.U.NoticeWithAttachment($('#'+notice.id));
 413                                     SN.U.NoticeReplyTo($('#'+notice.id));
 414                                 }
 415                             }
 416                             else {
 417                                 // Not on a timeline that this belongs on?
 418                                 // Just show a success message.
 419                                 showFeedback('success', $('title', data).text());
 420                             }
 421                         }
 422                         form.resetForm();
 423                         form.find('[name=inreplyto]').val('');
 424                         form.find('.attach-status').remove();
 425                         SN.U.FormNoticeEnhancements(form);
 426                     }
 427                 },
 428                 complete: function(xhr, textStatus) {
 429                     form
 430                         .removeClass(SN.C.S.Processing)
 431                         .find('.submit')
 432                             .removeAttr(SN.C.S.Disabled)
 433                             .removeClass(SN.C.S.Disabled);
 434
 435                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 436                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 437                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 438                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 439                     form.find('[name=notice_data-geo]').attr('checked', SN.C.I.NoticeDataGeo.NDG);
 440                 }
 441             });
 442         },
 443
 444         normalizeGeoData: function(form) {
 445             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 446             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 447             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 448             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 449             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked'); // @fixme
 450
 451             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 452
 453             if (cookieValue !== null && cookieValue != 'disabled') {
 454                 cookieValue = JSON.parse(cookieValue);
 455                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 456                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 457                 if (cookieValue.NLNS) {
 458                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 459                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 460                 } else {
 461                     form.find('[name=location_ns]').val('');
 462                     form.find('[name=location_id]').val('');
 463                 }
 464             }
 465             if (cookieValue == 'disabled') {
 466                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', false).attr('checked');
 467             }
 468             else {
 469                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', true).attr('checked');
 470             }
 471
 472         },
 473         /**
 474          * Fetch an XML DOM from an XHR's response data.
 475          *
 476          * Works around unavailable responseXML when document.domain
 477          * has been modified by Meteor or other tools, in some but not
 478          * all browsers.
 479          *
 480          * @param {XMLHTTPRequest} xhr
 481          * @return DOMDocument
 482          */
 483         GetResponseXML: function(xhr) {
 484             try {
 485                 return xhr.responseXML;
 486             } catch (e) {
 487                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 488             }
 489         },
 490
 491         /**
 492          * Setup function -- DOES NOT trigger actions immediately.
 493          *
 494          * Sets up event handlers on all visible notice's reply buttons to
 495          * tweak the new-notice form with needed variables and focus it
 496          * when pushed.
 497          *
 498          * (This replaces the default reply button behavior to submit
 499          * directly to a form which comes back with a specialized page
 500          * with the form data prefilled.)
 501          *
 502          * @access private
 503          */
 504         NoticeReply: function() {
 505             if ($('#content .notice_reply').length > 0) {
 506                 $('#content .notice').each(function() { SN.U.NoticeReplyTo($(this)); });
 507             }
 508         },
 509
 510         /**
 511          * Setup function -- DOES NOT trigger actions immediately.
 512          *
 513          * Sets up event handlers on the given notice's reply button to
 514          * tweak the new-notice form with needed variables and focus it
 515          * when pushed.
 516          *
 517          * (This replaces the default reply button behavior to submit
 518          * directly to a form which comes back with a specialized page
 519          * with the form data prefilled.)
 520          *
 521          * @param {jQuery} notice: jQuery object containing one or more notices
 522          * @access private
 523          */
 524         NoticeReplyTo: function(notice) {
 525             notice.find('.notice_reply').live('click', function(e) {
 526                 e.preventDefault();
 527                 var nickname = ($('.author .nickname', notice).length > 0) ? $($('.author .nickname', notice)[0]) : $('.author .nickname.uid');
 528                 SN.U.NoticeInlineReplyTrigger(notice, '@' + nickname.text());
 529                 return false;
 530             });
 531         },
 532
 533         /**
 534          * Open up a notice's inline reply box.
 535          *
 536          * @param {jQuery} notice: jQuery object containing one notice
 537          * @param {String} initialText
 538          */
 539         NoticeInlineReplyTrigger: function(notice, initialText) {
 540             // Find the notice we're replying to...
 541             var id = $($('.notice_id', notice)[0]).text();
 542             var parentNotice = notice;
 543
 544             // Find the threaded replies view we'll be adding to...
 545             var list = notice.closest('.notices');
 546             if (list.hasClass('threaded-replies')) {
 547                 // We're replying to a reply; use reply form on the end of this list.
 548                 // We'll add our form at the end of this; grab the root notice.
 549                 parentNotice = list.closest('.notice');
 550             } else {
 551                 // We're replying to a parent notice; pull its threaded list
 552                 // and we'll add on the end of it. Will add if needed.
 553                 list = $('ul.threaded-replies', notice);
 554                 if (list.length == 0) {
 555                     list = $('<ul class="notices threaded-replies xoxo"></ul>');
 556                     notice.append(list);
 557                 }
 558             }
 559
 560             // See if the form's already open...
 561             var replyForm = $('.notice-reply-form', list);
 562             if (replyForm.length == 0) {
 563                 // Remove placeholder if any
 564                 $('li.notice-reply-placeholder').remove();
 565
 566                 // Create the reply form entry at the end
 567                 var replyItem = $('li.notice-reply', list);
 568                 if (replyItem.length == 0) {
 569                     replyItem = $('<li class="notice-reply">' +
 570                                       '<form class="notice-reply-form" method="post">' +
 571                                           '<textarea name="status_textarea"></textarea>' +
 572                                           '<div class="controls">' +
 573                                           '<input type="hidden" name="token">' +
 574                                           '<input type="hidden" name="inreplyto">' +
 575                                           '<input type="submit" class="submit">' +
 576                                       '</div>' +
 577                                       '</form>' +
 578                                   '</li>');
 579
 580                     var baseForm = $('#form_notice');
 581                     replyForm = replyItem.find('form');
 582                     replyForm.attr('action', baseForm.attr('action'));
 583                     replyForm.find('input[name="token"]').val(baseForm.find('input[name=token]').val());
 584                     replyForm.find('input[type="submit"]').val(SN.msg('reply_submit'));
 585                     list.append(replyItem);
 586
 587                     replyForm.find('textarea').blur(function() {
 588                         var textarea = $(this);
 589                         var txt = $.trim(textarea.val());
 590                         if (txt == '' || txt == textarea.data('initialText')) {
 591                             // Nothing to say? Begone!
 592                             replyItem.remove();
 593                             if (list.find('li').length > 0) {
 594                                 SN.U.NoticeInlineReplyPlaceholder(parentNotice);
 595                             } else {
 596                                 list.remove();
 597                             }
 598                         }
 599                     });
 600                     replyForm.submit(function(event) {
 601                         var form = replyForm;
 602                         $.ajax({
 603                             type: 'POST',
 604                             dataType: 'xml',
 605                             url: SN.U.RewriteAjaxAction(form.attr('action')),
 606                             data: form.serialize() + '&ajax=1',
 607                             beforeSend: function(xhr) {
 608                                 form
 609                                     .addClass(SN.C.S.Processing)
 610                                     .find('.submit')
 611                                         .addClass(SN.C.S.Disabled)
 612                                         .attr(SN.C.S.Disabled, SN.C.S.Disabled)
 613                                         .end()
 614                                     .find('textarea')
 615                                         .addClass(SN.C.S.Disabled)
 616                                         .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 617                             },
 618                             error: function (xhr, textStatus, errorThrown) {
 619                                 alert(errorThrown || textStatus);
 620                             },
 621                             success: function(data, textStatus) {
 622                                 var orig_li = $('li', data)[0];
 623                                 if (orig_li) {
 624                                     var li = document._importNode(orig_li, true);
 625                                     var id = $(li).attr('id');
 626                                     if ($("#"+id).length == 0) {
 627                                         replyItem.replaceWith(li);
 628                                         SN.U.NoticeInlineReplyPlaceholder(parentNotice);
 629                                     } else {
 630                                         // Realtime came through before us...
 631                                         replyItem.remove();
 632                                     }
 633                                 }
 634                             }
 635                         });
 636                         event.preventDefault();
 637                         return false;
 638                     });
 639                 }
 640             }
 641
 642             // Override...?
 643             replyForm.find('input[name=inreplyto]').val(id);
 644
 645             // Set focus...
 646             var text = replyForm.find('textarea');
 647             if (text.length == 0) {
 648                 throw "No textarea";
 649             }
 650             var replyto = '';
 651             if (initialText) {
 652                 replyto = initialText + ' ';
 653             }
 654             text.val(replyto + text.val().replace(RegExp(replyto, 'i'), ''));
 655             text.data('initialText', $.trim(initialText + ''));
 656             text.focus();
 657             if (text[0].setSelectionRange) {
 658                 var len = text.val().length;
 659                 text[0].setSelectionRange(len,len);
 660             }
 661         },
 662
 663         /**
 664          * Setup function -- DOES NOT apply immediately.
 665          *
 666          * Sets up event handlers for favor/disfavor forms to submit via XHR.
 667          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 668          */
 669         NoticeFavor: function() {
 670             $('.form_favor').live('click', function() { SN.U.FormXHR($(this)); return false; });
 671             $('.form_disfavor').live('click', function() { SN.U.FormXHR($(this)); return false; });
 672         },
 673
 674         NoticeInlineReplyPlaceholder: function(notice) {
 675             var list = notice.find('ul.threaded-replies');
 676             var placeholder = $('<li class="notice-reply-placeholder">' +
 677                                     '<input class="placeholder">' +
 678                                 '</li>');
 679             placeholder.click(function() {
 680                 SN.U.NoticeInlineReplyTrigger(notice);
 681             });
 682             placeholder.find('input').val(SN.msg('reply_placeholder'));
 683             list.append(placeholder);
 684         },
 685
 686         /**
 687          * Setup function -- DOES NOT apply immediately.
 688          *
 689          * Sets up event handlers for favor/disfavor forms to submit via XHR.
 690          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 691          */
 692         NoticeInlineReplySetup: function() {
 693             $('.threaded-replies').each(function() {
 694                 var list = $(this);
 695                 var notice = list.closest('.notice');
 696                 SN.U.NoticeInlineReplyPlaceholder(notice);
 697             });
 698         },
 699
 700         /**
 701          * Setup function -- DOES NOT trigger actions immediately.
 702          *
 703          * Sets up event handlers for repeat forms to toss up a confirmation
 704          * popout before submitting.
 705          *
 706          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 707          */
 708         NoticeRepeat: function() {
 709             $('.form_repeat').live('click', function(e) {
 710                 e.preventDefault();
 711
 712                 SN.U.NoticeRepeatConfirmation($(this));
 713                 return false;
 714             });
 715         },
 716
 717         /**
 718          * Shows a confirmation dialog box variant of the repeat button form.
 719          * This seems to use a technique where the repeat form contains
 720          * _both_ a standalone button _and_ text and buttons for a dialog.
 721          * The dialog will close after its copy of the form is submitted,
 722          * or if you click its 'close' button.
 723          *
 724          * The dialog is created by duplicating the original form and changing
 725          * its style; while clever, this is hard to generalize and probably
 726          * duplicates a lot of unnecessary HTML output.
 727          *
 728          * @fixme create confirmation dialogs through a generalized interface
 729          * that can be reused instead of hardcoded text and styles.
 730          *
 731          * @param {jQuery} form
 732          */
 733         NoticeRepeatConfirmation: function(form) {
 734             var submit_i = form.find('.submit');
 735
 736             var submit = submit_i.clone();
 737             submit
 738                 .addClass('submit_dialogbox')
 739                 .removeClass('submit');
 740             form.append(submit);
 741             submit.bind('click', function() { SN.U.FormXHR(form); return false; });
 742
 743             submit_i.hide();
 744
 745             form
 746                 .addClass('dialogbox')
 747                 .append('<button class="close">&#215;</button>')
 748                 .closest('.notice-options')
 749                     .addClass('opaque');
 750
 751             form.find('button.close').click(function(){
 752                 $(this).remove();
 753
 754                 form
 755                     .removeClass('dialogbox')
 756                     .closest('.notice-options')
 757                         .removeClass('opaque');
 758
 759                 form.find('.submit_dialogbox').remove();
 760                 form.find('.submit').show();
 761
 762                 return false;
 763             });
 764         },
 765
 766         /**
 767          * Setup function -- DOES NOT trigger actions immediately.
 768          *
 769          * Goes through all notices currently displayed and sets up attachment
 770          * handling if needed.
 771          */
 772         NoticeAttachments: function() {
 773             $('.notice a.attachment').each(function() {
 774                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 775             });
 776         },
 777
 778         /**
 779          * Setup function -- DOES NOT trigger actions immediately.
 780          *
 781          * Sets up special attachment link handling if needed. Currently this
 782          * consists only of making the "more" button used for OStatus message
 783          * cropping turn into an auto-expansion button that loads the full
 784          * text from an attachment file.
 785          *
 786          * @param {jQuery} notice
 787          */
 788         NoticeWithAttachment: function(notice) {
 789             if (notice.find('.attachment').length === 0) {
 790                 return;
 791             }
 792
 793             var attachment_more = notice.find('.attachment.more');
 794             if (attachment_more.length > 0) {
 795                 $(attachment_more[0]).click(function() {
 796                     var m = $(this);
 797                     m.addClass(SN.C.S.Processing);
 798                     $.get(m.attr('href')+'/ajax', null, function(data) {
 799                         m.parent('.entry-content').html($(data).find('#attachment_view .entry-content').html());
 800                     });
 801
 802                     return false;
 803                 }).attr('title', SN.msg('showmore_tooltip'));
 804             }
 805         },
 806
 807         /**
 808          * Setup function -- DOES NOT trigger actions immediately.
 809          *
 810          * Sets up event handlers for the file-attachment widget in the
 811          * new notice form. When a file is selected, a box will be added
 812          * below the text input showing the filename and, if supported
 813          * by the browser, a thumbnail preview.
 814          *
 815          * This preview box will also allow removing the attachment
 816          * prior to posting.
 817          *
 818          * @param {jQuery} form
 819          */
 820         NoticeDataAttach: function(form) {
 821             var NDA = form.find('input[type=file]');
 822             NDA.change(function(event) {
 823                 form.find('.attach-status').remove();
 824
 825                 var filename = $(this).val();
 826                 if (!filename) {
 827                     // No file -- we've been tricked!
 828                     return false;
 829                 }
 830
 831                 var attachStatus = $('<div class="attach-status '+SN.C.S.Success+'"><code></code> <button class="close">&#215;</button></div>');
 832                 attachStatus.find('code').text(filename);
 833                 attachStatus.find('button').click(function(){
 834                     attachStatus.remove();
 835                     NDA.val('');
 836
 837                     return false;
 838                 });
 839                 form.append(attachStatus);
 840
 841                 if (typeof this.files == "object") {
 842                     // Some newer browsers will let us fetch the files for preview.
 843                     for (var i = 0; i < this.files.length; i++) {
 844                         SN.U.PreviewAttach(form, this.files[i]);
 845                     }
 846                 }
 847             });
 848         },
 849
 850         /**
 851          * Get PHP's MAX_FILE_SIZE setting for this form;
 852          * used to apply client-side file size limit checks.
 853          *
 854          * @param {jQuery} form
 855          * @return int max size in bytes; 0 or negative means no limit
 856          */
 857         maxFileSize: function(form) {
 858             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 859             if (max) {
 860                 return parseInt(max);
 861             } else {
 862                 return 0;
 863             }
 864         },
 865
 866         /**
 867          * For browsers with FileAPI support: make a thumbnail if possible,
 868          * and append it into the attachment display widget.
 869          *
 870          * Known good:
 871          * - Firefox 3.6.6, 4.0b7
 872          * - Chrome 8.0.552.210
 873          *
 874          * Known ok metadata, can't get contents:
 875          * - Safari 5.0.2
 876          *
 877          * Known fail:
 878          * - Opera 10.63, 11 beta (no input.files interface)
 879          *
 880          * @param {jQuery} form
 881          * @param {File} file
 882          *
 883          * @todo use configured thumbnail size
 884          * @todo detect pixel size?
 885          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 886          */
 887         PreviewAttach: function(form, file) {
 888             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 889             var preview = true;
 890
 891             var blobAsDataURL;
 892             if (typeof window.createObjectURL != "undefined") {
 893                 /**
 894                  * createObjectURL lets us reference the file directly from an <img>
 895                  * This produces a compact URL with an opaque reference to the file,
 896                  * which we can reference immediately.
 897                  *
 898                  * - Firefox 3.6.6: no
 899                  * - Firefox 4.0b7: no
 900                  * - Safari 5.0.2: no
 901                  * - Chrome 8.0.552.210: works!
 902                  */
 903                 blobAsDataURL = function(blob, callback) {
 904                     callback(window.createObjectURL(blob));
 905                 }
 906             } else if (typeof window.FileReader != "undefined") {
 907                 /**
 908                  * FileAPI's FileReader can build a data URL from a blob's contents,
 909                  * but it must read the file and build it asynchronously. This means
 910                  * we'll be passing a giant data URL around, which may be inefficient.
 911                  *
 912                  * - Firefox 3.6.6: works!
 913                  * - Firefox 4.0b7: works!
 914                  * - Safari 5.0.2: no
 915                  * - Chrome 8.0.552.210: works!
 916                  */
 917                 blobAsDataURL = function(blob, callback) {
 918                     var reader = new FileReader();
 919                     reader.onload = function(event) {
 920                         callback(reader.result);
 921                     }
 922                     reader.readAsDataURL(blob);
 923                 }
 924             } else {
 925                 preview = false;
 926             }
 927
 928             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 929             if ($.inArray(file.type, imageTypes) == -1) {
 930                 // We probably don't know how to show the file.
 931                 preview = false;
 932             }
 933
 934             var maxSize = 8 * 1024 * 1024;
 935             if (file.size > maxSize) {
 936                 // Don't kill the browser trying to load some giant image.
 937                 preview = false;
 938             }
 939
 940             if (preview) {
 941                 blobAsDataURL(file, function(url) {
 942                     var img = $('<img>')
 943                         .attr('title', tooltip)
 944                         .attr('alt', tooltip)
 945                         .attr('src', url)
 946                         .attr('style', 'height: 120px');
 947                     form.find('.attach-status').append(img);
 948                 });
 949             } else {
 950                 var img = $('<div></div>').text(tooltip);
 951                 form.find('.attach-status').append(img);
 952             }
 953         },
 954
 955         /**
 956          * Setup function -- DOES NOT trigger actions immediately.
 957          *
 958          * Initializes state for the location-lookup features in the
 959          * new-notice form. Seems to set up some event handlers for
 960          * triggering lookups and using the new values.
 961          *
 962          * @param {jQuery} form
 963          *
 964          * @fixme tl;dr
 965          * @fixme there's not good visual state update here, so users have a
 966          *        hard time figuring out if it's working or fixing if it's wrong.
 967          *
 968          */
 969         NoticeLocationAttach: function(form) {
 970             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
 971             var NLat = form.find('[name=lat]')
 972             var NLon = form.find('[name=lon]')
 973             var NLNS = form.find('[name=location_ns]').val();
 974             var NLID = form.find('[name=location_id]').val();
 975             var NLN = $('#'+SN.C.S.NoticeGeoName).text(); // @fixme does this exist?
 976             var NDGe = form.find('[name=notice_data-geo]');
 977
 978             function removeNoticeDataGeo(error) {
 979                 $('label[for='+SN.C.S.NoticeDataGeo+']')
 980                     .attr('title', jQuery.trim($('label[for='+SN.C.S.NoticeDataGeo+']').text()))
 981                     .removeClass('checked');
 982
 983                 form.find('[name=lat]').val('');
 984                 form.find('[name=lon]').val('');
 985                 form.find('[name=location_ns]').val('');
 986                 form.find('[name=location_id]').val('');
 987                 form.find('[name=notice_data-geo]').attr('checked', false);
 988
 989                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
 990
 991                 if (error) {
 992                     $('.geo_status_wrapper').removeClass('success').addClass('error');
 993                     $('.geo_status_wrapper .geo_status').text(error);
 994                 } else {
 995                     $('.geo_status_wrapper').remove();
 996                 }
 997             }
 998
 999             function getJSONgeocodeURL(geocodeURL, data) {
1000                 SN.U.NoticeGeoStatus('Looking up place name...');
1001                 $.getJSON(geocodeURL, data, function(location) {
1002                     var lns, lid;
1003
1004                     if (typeof(location.location_ns) != 'undefined') {
1005                         form.find('[name=location_ns]').val(location.location_ns);
1006                         lns = location.location_ns;
1007                     }
1008
1009                     if (typeof(location.location_id) != 'undefined') {
1010                         form.find('[name=location_id]').val(location.location_id);
1011                         lid = location.location_id;
1012                     }
1013
1014                     if (typeof(location.name) == 'undefined') {
1015                         NLN_text = data.lat + ';' + data.lon;
1016                     }
1017                     else {
1018                         NLN_text = location.name;
1019                     }
1020
1021                     SN.U.NoticeGeoStatus(NLN_text, data.lat, data.lon, location.url);
1022                     $('label[for='+SN.C.S.NoticeDataGeo+']')
1023                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1024
1025                     form.find('[name=lat]').val(data.lat);
1026                     form.find('[name=lon]').val(data.lon);
1027                     form.find('[name=location_ns]').val(lns);
1028                     form.find('[name=location_id]').val(lid);
1029                     form.find('[name=notice_data-geo]').attr('checked', true);
1030
1031                     var cookieValue = {
1032                         NLat: data.lat,
1033                         NLon: data.lon,
1034                         NLNS: lns,
1035                         NLID: lid,
1036                         NLN: NLN_text,
1037                         NLNU: location.url,
1038                         NDG: true
1039                     };
1040
1041                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1042                 });
1043             }
1044
1045             if (NDGe.length > 0) {
1046                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1047                     NDGe.attr('checked', false);
1048                 }
1049                 else {
1050                     NDGe.attr('checked', true);
1051                 }
1052
1053                 var NGW = $('#notice_data-geo_wrap');
1054                 var geocodeURL = NGW.attr('title');
1055                 NGW.removeAttr('title');
1056
1057                 $('label[for='+SN.C.S.NoticeDataGeo+']')
1058                     .attr('title', jQuery.trim($('label[for='+SN.C.S.NoticeDataGeo+']').text()));
1059
1060                 NDGe.change(function() {
1061                     if ($('#'+SN.C.S.NoticeDataGeo).attr('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1062                         $('label[for='+SN.C.S.NoticeDataGeo+']')
1063                             .attr('title', NoticeDataGeo_text.ShareDisable)
1064                             .addClass('checked');
1065
1066                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1067                             if (navigator.geolocation) {
1068                                 SN.U.NoticeGeoStatus('Requesting location from browser...');
1069                                 navigator.geolocation.getCurrentPosition(
1070                                     function(position) {
1071                                         form.find('[name=lat]').val(position.coords.latitude);
1072                                         form.find('[name=lon]').val(position.coords.longitude);
1073
1074                                         var data = {
1075                                             lat: position.coords.latitude,
1076                                             lon: position.coords.longitude,
1077                                             token: $('#token').val()
1078                                         };
1079
1080                                         getJSONgeocodeURL(geocodeURL, data);
1081                                     },
1082
1083                                     function(error) {
1084                                         switch(error.code) {
1085                                             case error.PERMISSION_DENIED:
1086                                                 removeNoticeDataGeo('Location permission denied.');
1087                                                 break;
1088                                             case error.TIMEOUT:
1089                                                 //$('#'+SN.C.S.NoticeDataGeo).attr('checked', false);
1090                                                 removeNoticeDataGeo('Location lookup timeout.');
1091                                                 break;
1092                                         }
1093                                     },
1094
1095                                     {
1096                                         timeout: 10000
1097                                     }
1098                                 );
1099                             }
1100                             else {
1101                                 if (NLat.length > 0 && NLon.length > 0) {
1102                                     var data = {
1103                                         lat: NLat,
1104                                         lon: NLon,
1105                                         token: $('#token').val()
1106                                     };
1107
1108                                     getJSONgeocodeURL(geocodeURL, data);
1109                                 }
1110                                 else {
1111                                     removeNoticeDataGeo();
1112                                     $('#'+SN.C.S.NoticeDataGeo).remove();
1113                                     $('label[for='+SN.C.S.NoticeDataGeo+']').remove();
1114                                 }
1115                             }
1116                         }
1117                         else {
1118                             var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1119
1120                             form.find('[name=lat]').val(cookieValue.NLat);
1121                             form.find('[name=lon]').val(cookieValue.NLon);
1122                             form.find('[name=location_ns]').val(cookieValue.NLNS);
1123                             form.find('[name=location_id]').val(cookieValue.NLID);
1124                             form.find('[name=notice_data-geo]').attr('checked', cookieValue.NDG);
1125
1126                             SN.U.NoticeGeoStatus(cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1127                             $('label[for='+SN.C.S.NoticeDataGeo+']')
1128                                 .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1129                                 .addClass('checked');
1130                         }
1131                     }
1132                     else {
1133                         removeNoticeDataGeo();
1134                     }
1135                 }).change();
1136             }
1137         },
1138
1139         /**
1140          * Create or update a geolocation status widget in this notice posting form.
1141          *
1142          * @param {String} status
1143          * @param {String} lat (optional)
1144          * @param {String} lon (optional)
1145          * @param {String} url (optional)
1146          */
1147         NoticeGeoStatus: function(status, lat, lon, url)
1148         {
1149             var form = $('#form_notice');
1150             var wrapper = form.find('.geo_status_wrapper');
1151             if (wrapper.length == 0) {
1152                 wrapper = $('<div class="'+SN.C.S.Success+' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1153                 wrapper.find('button.close').click(function() {
1154                     $('#'+SN.C.S.NoticeDataGeo).removeAttr('checked').change();
1155                 });
1156                 form.append(wrapper);
1157             }
1158             var label;
1159             if (url) {
1160                 label = $('<a></a>').attr('href', url);
1161             } else {
1162                 label = $('<span></span>');
1163             }
1164             label.text(status);
1165             if (lat || lon) {
1166                 var latlon = lat + ';' + lon;
1167                 label.attr('title', latlon);
1168                 if (!status) {
1169                     label.text(latlon)
1170                 }
1171             }
1172             wrapper.find('.geo_status').empty().append(label);
1173         },
1174
1175         /**
1176          * Setup function -- DOES NOT trigger actions immediately.
1177          *
1178          * Initializes event handlers for the "Send direct message" link on
1179          * profile pages, setting it up to display a dialog box when clicked.
1180          *
1181          * Unlike the repeat confirmation form, this appears to fetch
1182          * the form _from the original link target_, so the form itself
1183          * doesn't need to be in the current document.
1184          *
1185          * @fixme breaks ability to open link in new window?
1186          */
1187         NewDirectMessage: function() {
1188             NDM = $('.entity_send-a-message a');
1189             NDM.attr({'href':NDM.attr('href')+'&ajax=1'});
1190             NDM.bind('click', function() {
1191                 var NDMF = $('.entity_send-a-message form');
1192                 if (NDMF.length === 0) {
1193                     $(this).addClass(SN.C.S.Processing);
1194                     $.get(NDM.attr('href'), null, function(data) {
1195                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1196                         NDMF = $('.entity_send-a-message .form_notice');
1197                         SN.U.FormNoticeXHR(NDMF);
1198                         SN.U.FormNoticeEnhancements(NDMF);
1199                         NDMF.append('<button class="close">&#215;</button>');
1200                         $('.entity_send-a-message button').click(function(){
1201                             NDMF.hide();
1202                             return false;
1203                         });
1204                         NDM.removeClass(SN.C.S.Processing);
1205                     });
1206                 }
1207                 else {
1208                     NDMF.show();
1209                     $('.entity_send-a-message textarea').focus();
1210                 }
1211                 return false;
1212             });
1213         },
1214
1215         /**
1216          * Return a date object with the current local time on the
1217          * given year, month, and day.
1218          *
1219          * @param {number} year: 4-digit year
1220          * @param {number} month: 0 == January
1221          * @param {number} day: 1 == 1
1222          * @return {Date}
1223          */
1224         GetFullYear: function(year, month, day) {
1225             var date = new Date();
1226             date.setFullYear(year, month, day);
1227
1228             return date;
1229         },
1230
1231         /**
1232          * Some sort of object interface for storing some structured
1233          * information in a cookie.
1234          *
1235          * Appears to be used to save the last-used login nickname?
1236          * That's something that browsers usually take care of for us
1237          * these days, do we really need to do it? Does anything else
1238          * use this interface?
1239          *
1240          * @fixme what is this?
1241          * @fixme should this use non-cookie local storage when available?
1242          */
1243         StatusNetInstance: {
1244             /**
1245              * @fixme what is this?
1246              */
1247             Set: function(value) {
1248                 var SNI = SN.U.StatusNetInstance.Get();
1249                 if (SNI !== null) {
1250                     value = $.extend(SNI, value);
1251                 }
1252
1253                 $.cookie(
1254                     SN.C.S.StatusNetInstance,
1255                     JSON.stringify(value),
1256                     {
1257                         path: '/',
1258                         expires: SN.U.GetFullYear(2029, 0, 1)
1259                     });
1260             },
1261
1262             /**
1263              * @fixme what is this?
1264              */
1265             Get: function() {
1266                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1267                 if (cookieValue !== null) {
1268                     return JSON.parse(cookieValue);
1269                 }
1270                 return null;
1271             },
1272
1273             /**
1274              * @fixme what is this?
1275              */
1276             Delete: function() {
1277                 $.cookie(SN.C.S.StatusNetInstance, null);
1278             }
1279         },
1280
1281         /**
1282          * Check if the current page is a timeline where the current user's
1283          * posts should be displayed immediately on success.
1284          *
1285          * @fixme this should be done in a saner way, with machine-readable
1286          * info about what page we're looking at.
1287          *
1288          * @param {DOMElement} notice: HTML chunk with formatted notice
1289          * @return boolean
1290          */
1291         belongsOnTimeline: function(notice) {
1292             var action = $("body").attr('id');
1293             if (action == 'public') {
1294                 return true;
1295             }
1296
1297             var profileLink = $('#nav_profile a').attr('href');
1298             if (profileLink) {
1299                 var authorUrl = $(notice).find('.entry-title .author a.url').attr('href');
1300                 if (authorUrl == profileLink) {
1301                     if (action == 'all' || action == 'showstream') {
1302                         // Posts always show on your own friends and profile streams.
1303                         return true;
1304                     }
1305                 }
1306             }
1307
1308             // @fixme tag, group, reply timelines should be feasible as well.
1309             // Mismatch between id-based and name-based user/group links currently complicates
1310             // the lookup, since all our inline mentions contain the absolute links but the
1311             // UI links currently on the page use malleable names.
1312
1313             return false;
1314         }
1315     },
1316
1317     Init: {
1318         /**
1319          * If user is logged in, run setup code for the new notice form:
1320          *
1321          *  - char counter
1322          *  - AJAX submission
1323          *  - location events
1324          *  - file upload events
1325          */
1326         NoticeForm: function() {
1327             if ($('body.user_in').length > 0) {
1328                 $('.'+SN.C.S.FormNotice).each(function() {
1329                     var form = $(this);
1330                     SN.U.NoticeLocationAttach(form);
1331                     SN.U.FormNoticeXHR(form);
1332                     SN.U.FormNoticeEnhancements(form);
1333                     SN.U.NoticeDataAttach(form);
1334                 });
1335             }
1336         },
1337
1338         /**
1339          * Run setup code for notice timeline views items:
1340          *
1341          * - AJAX submission for fave/repeat/reply (if logged in)
1342          * - Attachment link extras ('more' links)
1343          */
1344         Notices: function() {
1345             if ($('body.user_in').length > 0) {
1346                 SN.U.NoticeFavor();
1347                 SN.U.NoticeRepeat();
1348                 SN.U.NoticeReply();
1349                 SN.U.NoticeInlineReplySetup();
1350             }
1351
1352             SN.U.NoticeAttachments();
1353         },
1354
1355         /**
1356          * Run setup code for user & group profile page header area if logged in:
1357          *
1358          * - AJAX submission for sub/unsub/join/leave/nudge
1359          * - AJAX form popup for direct-message
1360          */
1361         EntityActions: function() {
1362             if ($('body.user_in').length > 0) {
1363                 $('.form_user_subscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1364                 $('.form_user_unsubscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1365                 $('.form_group_join').live('click', function() { SN.U.FormXHR($(this)); return false; });
1366                 $('.form_group_leave').live('click', function() { SN.U.FormXHR($(this)); return false; });
1367                 $('.form_user_nudge').live('click', function() { SN.U.FormXHR($(this)); return false; });
1368
1369                 SN.U.NewDirectMessage();
1370             }
1371         },
1372
1373         /**
1374          * Run setup code for login form:
1375          *
1376          * - loads saved last-used-nickname from cookie
1377          * - sets event handler to save nickname to cookie on submit
1378          *
1379          * @fixme is this necessary? Browsers do their own form saving these days.
1380          */
1381         Login: function() {
1382             if (SN.U.StatusNetInstance.Get() !== null) {
1383                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1384                 if (nickname !== null) {
1385                     $('#form_login #nickname').val(nickname);
1386                 }
1387             }
1388
1389             $('#form_login').bind('submit', function() {
1390                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1391                 return true;
1392             });
1393         },
1394
1395         /**
1396          * Add logic to any file upload forms to handle file size limits,
1397          * on browsers that support basic FileAPI.
1398          */
1399         UploadForms: function () {
1400             $('input[type=file]').change(function(event) {
1401                 if (typeof this.files == "object" && this.files.length > 0) {
1402                     var size = 0;
1403                     for (var i = 0; i < this.files.length; i++) {
1404                         size += this.files[i].size;
1405                     }
1406
1407                     var max = SN.U.maxFileSize($(this.form));
1408                     if (max > 0 && size > max) {
1409                         var msg = 'File too large: maximum upload size is %d bytes.';
1410                         alert(msg.replace('%d', max));
1411
1412                         // Clear the files.
1413                         $(this).val('');
1414                         event.preventDefault();
1415                         return false;
1416                     }
1417                 }
1418             });
1419         }
1420     }
1421 };
1422
1423 /**
1424  * Run initialization functions on DOM-ready.
1425  *
1426  * Note that if we're waiting on other scripts to load, this won't happen
1427  * until that's done. To load scripts asynchronously without delaying setup,
1428  * don't start them loading until after DOM-ready time!
1429  */
1430 $(document).ready(function(){
1431     SN.Init.UploadForms();
1432     if ($('.'+SN.C.S.FormNotice).length > 0) {
1433         SN.Init.NoticeForm();
1434     }
1435     if ($('#content .notices').length > 0) {
1436         SN.Init.Notices();
1437     }
1438     if ($('#content .entity_actions').length > 0) {
1439         SN.Init.EntityActions();
1440     }
1441     if ($('#form_login').length > 0) {
1442         SN.Init.Login();
1443     }
1444 });