js/util.js

   1 /*
   2  * StatusNet - a distributed open-source microblogging tool
   3  * Copyright (C) 2008, StatusNet, Inc.
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU Affero General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU Affero General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Affero General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * @category  UI interaction
  19  * @package   StatusNet
  20  * @author    Sarven Capadisli <csarven@status.net>
  21  * @author    Evan Prodromou <evan@status.net>
  22  * @author    Brion Vibber <brion@status.net>
  23  * @copyright 2009,2010 StatusNet, Inc.
  24  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  25  * @link      http://status.net/
  26  */
  27
  28 var SN = { // StatusNet
  29     C: { // Config
  30         I: { // Init
  31             CounterBlackout: false,
  32             MaxLength: 140,
  33             PatternUsername: /^[0-9a-zA-Z\-_.]*$/,
  34             HTTP20x30x: [200, 201, 202, 203, 204, 205, 206, 300, 301, 302, 303, 304, 305, 306, 307]
  35         },
  36
  37         /**
  38          * @fixme are these worth the trouble? They seem to mostly just duplicate
  39          * themselves while slightly obscuring the actual selector, so it's hard
  40          * to pop over to the HTML and find something.
  41          *
  42          * In theory, minification could reduce them to shorter variable names,
  43          * but at present that doesn't happen with yui-compressor.
  44          */
  45         S: { // Selector
  46             Disabled: 'disabled',
  47             Warning: 'warning',
  48             Error: 'error',
  49             Success: 'success',
  50             Processing: 'processing',
  51             CommandResult: 'command_result',
  52             FormNotice: 'form_notice',
  53             NoticeDataGeo: 'notice_data-geo',
  54             NoticeDataGeoCookie: 'NoticeDataGeo',
  55             NoticeDataGeoSelected: 'notice_data-geo_selected',
  56             StatusNetInstance:'StatusNetInstance'
  57         }
  58     },
  59
  60     /**
  61      * Map of localized message strings exported to script from the PHP
  62      * side via Action::getScriptMessages().
  63      *
  64      * Retrieve them via SN.msg(); this array is an implementation detail.
  65      *
  66      * @access private
  67      */
  68     messages: {},
  69
  70     /**
  71      * Grabs a localized string that's been previously exported to us
  72      * from server-side code via Action::getScriptMessages().
  73      *
  74      * @example alert(SN.msg('coolplugin-failed'));
  75      *
  76      * @param {String} key: string key name to pull from message index
  77      * @return matching localized message string
  78      */
  79     msg: function(key) {
  80         if (typeof SN.messages[key] == "undefined") {
  81             return '[' + key + ']';
  82         } else {
  83             return SN.messages[key];
  84         }
  85     },
  86
  87     U: { // Utils
  88         /**
  89          * Setup function -- DOES NOT trigger actions immediately.
  90          *
  91          * Sets up event handlers on the new notice form.
  92          *
  93          * @param {jQuery} form: jQuery object whose first matching element is the form
  94          * @access private
  95          */
  96         FormNoticeEnhancements: function(form) {
  97             if (jQuery.data(form[0], 'ElementData') === undefined) {
  98                 MaxLength = form.find('.count').text();
  99                 if (typeof(MaxLength) == 'undefined') {
 100                      MaxLength = SN.C.I.MaxLength;
 101                 }
 102                 jQuery.data(form[0], 'ElementData', {MaxLength:MaxLength});
 103
 104                 SN.U.Counter(form);
 105
 106                 NDT = form.find('[name=status_textarea]');
 107
 108                 NDT.bind('keyup', function(e) {
 109                     SN.U.Counter(form);
 110                 });
 111
 112                 var delayedUpdate= function(e) {
 113                     // Cut and paste events fire *before* the operation,
 114                     // so we need to trigger an update in a little bit.
 115                     // This would be so much easier if the 'change' event
 116                     // actually fired every time the value changed. :P
 117                     window.setTimeout(function() {
 118                         SN.U.Counter(form);
 119                     }, 50);
 120                 };
 121                 // Note there's still no event for mouse-triggered 'delete'.
 122                 NDT.bind('cut', delayedUpdate)
 123                    .bind('paste', delayedUpdate);
 124             }
 125             else {
 126                 form.find('.count').text(jQuery.data(form[0], 'ElementData').MaxLength);
 127             }
 128         },
 129
 130         /**
 131          * To be called from event handlers on the notice import form.
 132          * Triggers an update of the remaining-characters counter.
 133          *
 134          * Additional counter updates will be suppressed during the
 135          * next half-second to avoid flooding the layout engine with
 136          * updates, followed by another automatic check.
 137          *
 138          * The maximum length is pulled from data established by
 139          * FormNoticeEnhancements.
 140          *
 141          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 142          * @access private
 143          */
 144         Counter: function(form) {
 145             SN.C.I.FormNoticeCurrent = form;
 146
 147             var MaxLength = jQuery.data(form[0], 'ElementData').MaxLength;
 148
 149             if (MaxLength <= 0) {
 150                 return;
 151             }
 152
 153             var remaining = MaxLength - SN.U.CharacterCount(form);
 154             var counter = form.find('.count');
 155
 156             if (remaining.toString() != counter.text()) {
 157                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 158                     if (counter.text() != String(remaining)) {
 159                         counter.text(remaining);
 160                     }
 161                     if (remaining < 0) {
 162                         form.addClass(SN.C.S.Warning);
 163                     } else {
 164                         form.removeClass(SN.C.S.Warning);
 165                     }
 166                     // Skip updates for the next 500ms.
 167                     // On slower hardware, updating on every keypress is unpleasant.
 168                     if (!SN.C.I.CounterBlackout) {
 169                         SN.C.I.CounterBlackout = true;
 170                         SN.C.I.FormNoticeCurrent = form;
 171                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 172                     }
 173                 }
 174             }
 175         },
 176
 177         /**
 178          * Pull the count of characters in the current edit field.
 179          * Plugins replacing the edit control may need to override this.
 180          *
 181          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 182          * @return number of chars
 183          */
 184         CharacterCount: function(form) {
 185             return form.find('[name=status_textarea]').val().length;
 186         },
 187
 188         /**
 189          * Called internally after the counter update blackout period expires;
 190          * runs another update to make sure we didn't miss anything.
 191          *
 192          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 193          * @access private
 194          */
 195         ClearCounterBlackout: function(form) {
 196             // Allow keyup events to poke the counter again
 197             SN.C.I.CounterBlackout = false;
 198             // Check if the string changed since we last looked
 199             SN.U.Counter(form);
 200         },
 201
 202         /**
 203          * Helper function to rewrite default HTTP form action URLs to HTTPS
 204          * so we can actually fetch them when on an SSL page in ssl=sometimes
 205          * mode.
 206          *
 207          * It would be better to output URLs that didn't hardcode protocol
 208          * and hostname in the first place...
 209          *
 210          * @param {String} url
 211          * @return string
 212          */
 213         RewriteAjaxAction: function(url) {
 214             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 215             if (document.location.protocol == 'https:' && url.substr(0, 5) == 'http:') {
 216                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 217             } else {
 218                 return url;
 219             }
 220         },
 221
 222         /**
 223          * Grabs form data and submits it asynchronously, with 'ajax=1'
 224          * parameter added to the rest.
 225          *
 226          * If a successful response includes another form, that form
 227          * will be extracted and copied in, replacing the original form.
 228          * If there's no form, the first paragraph will be used.
 229          *
 230          * @fixme can sometimes explode confusingly if returnd data is bogus
 231          * @fixme error handling is pretty vague
 232          * @fixme can't submit file uploads
 233          *
 234          * @param {jQuery} form: jQuery object whose first element is a form
 235          *
 236          * @access public
 237          */
 238         FormXHR: function(form) {
 239             $.ajax({
 240                 type: 'POST',
 241                 dataType: 'xml',
 242                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 243                 data: form.serialize() + '&ajax=1',
 244                 beforeSend: function(xhr) {
 245                     form
 246                         .addClass(SN.C.S.Processing)
 247                         .find('.submit')
 248                             .addClass(SN.C.S.Disabled)
 249                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 250                 },
 251                 error: function (xhr, textStatus, errorThrown) {
 252                     alert(errorThrown || textStatus);
 253                 },
 254                 success: function(data, textStatus) {
 255                     if (typeof($('form', data)[0]) != 'undefined') {
 256                         form_new = document._importNode($('form', data)[0], true);
 257                         form.replaceWith(form_new);
 258                     }
 259                     else {
 260                         form.replaceWith(document._importNode($('p', data)[0], true));
 261                     }
 262                 }
 263             });
 264         },
 265
 266         /**
 267          * Setup function -- DOES NOT trigger actions immediately.
 268          *
 269          * Sets up event handlers for special-cased async submission of the
 270          * notice-posting form, including some pre-post validation.
 271          *
 272          * Unlike FormXHR() this does NOT submit the form immediately!
 273          * It sets up event handlers so that any method of submitting the
 274          * form (click on submit button, enter, submit() etc) will trigger
 275          * it properly.
 276          *
 277          * Also unlike FormXHR(), this system will use a hidden iframe
 278          * automatically to handle file uploads via <input type="file">
 279          * controls.
 280          *
 281          * @fixme tl;dr
 282          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 283          * @fixme error handling is unreliable
 284          * @fixme cookieValue is a global variable, but probably shouldn't be
 285          * @fixme saving the location cache cookies should be split out
 286          * @fixme some error messages are hardcoded english: needs i18n
 287          * @fixme special-case for bookmarklet is confusing and uses a global var "self". Is this ok?
 288          *
 289          * @param {jQuery} form: jQuery object whose first element is a form
 290          *
 291          * @access public
 292          */
 293         FormNoticeXHR: function(form) {
 294             SN.C.I.NoticeDataGeo = {};
 295             form.append('<input type="hidden" name="ajax" value="1"/>');
 296
 297             // Make sure we don't have a mixed HTTP/HTTPS submission...
 298             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 299
 300             /**
 301              * Show a response feedback bit under the new-notice dialog.
 302              *
 303              * @param {String} cls: CSS class name to use ('error' or 'success')
 304              * @param {String} text
 305              * @access private
 306              */
 307             var showFeedback = function(cls, text) {
 308                 form.append(
 309                     $('<p class="form_response"></p>')
 310                         .addClass(cls)
 311                         .text(text)
 312                 );
 313             };
 314
 315             /**
 316              * Hide the previous response feedback, if any.
 317              */
 318             var removeFeedback = function() {
 319                 form.find('.form_response').remove();
 320             };
 321
 322             form.ajaxForm({
 323                 dataType: 'xml',
 324                 timeout: '60000',
 325                 beforeSend: function(formData) {
 326                     if (form.find('[name=status_textarea]').val() == '') {
 327                         form.addClass(SN.C.S.Warning);
 328                         return false;
 329                     }
 330                     form
 331                         .addClass(SN.C.S.Processing)
 332                         .find('.submit')
 333                             .addClass(SN.C.S.Disabled)
 334                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 335
 336                     SN.U.normalizeGeoData(form);
 337
 338                     return true;
 339                 },
 340                 error: function (xhr, textStatus, errorThrown) {
 341                     form
 342                         .removeClass(SN.C.S.Processing)
 343                         .find('.submit')
 344                             .removeClass(SN.C.S.Disabled)
 345                             .removeAttr(SN.C.S.Disabled, SN.C.S.Disabled);
 346                     removeFeedback();
 347                     if (textStatus == 'timeout') {
 348                         // @fixme i18n
 349                         showFeedback('error', 'Sorry! We had trouble sending your notice. The servers are overloaded. Please try again, and contact the site administrator if this problem persists.');
 350                     }
 351                     else {
 352                         var response = SN.U.GetResponseXML(xhr);
 353                         if ($('.'+SN.C.S.Error, response).length > 0) {
 354                             form.append(document._importNode($('.'+SN.C.S.Error, response)[0], true));
 355                         }
 356                         else {
 357                             if (parseInt(xhr.status) === 0 || jQuery.inArray(parseInt(xhr.status), SN.C.I.HTTP20x30x) >= 0) {
 358                                 form
 359                                     .resetForm()
 360                                     .find('.attach-status').remove();
 361                                 SN.U.FormNoticeEnhancements(form);
 362                             }
 363                             else {
 364                                 // @fixme i18n
 365                                 showFeedback('error', '(Sorry! We had trouble sending your notice ('+xhr.status+' '+xhr.statusText+'). Please report the problem to the site administrator if this happens again.');
 366                             }
 367                         }
 368                     }
 369                 },
 370                 success: function(data, textStatus) {
 371                     removeFeedback();
 372                     var errorResult = $('#'+SN.C.S.Error, data);
 373                     if (errorResult.length > 0) {
 374                         showFeedback('error', errorResult.text());
 375                     }
 376                     else {
 377                         if($('body')[0].id == 'bookmarklet') {
 378                             // @fixme self is not referenced anywhere?
 379                             self.close();
 380                         }
 381
 382                         var commandResult = $('#'+SN.C.S.CommandResult, data);
 383                         if (commandResult.length > 0) {
 384                             showFeedback('success', commandResult.text());
 385                         }
 386                         else {
 387                             // New notice post was successful. If on our timeline, show it!
 388                             var notice = document._importNode($('li', data)[0], true);
 389                             var notices = $('#notices_primary .notices:first');
 390                             var replyItem = form.closest('li.notice-reply');
 391
 392                             if (replyItem.length > 0) {
 393                                 // If this is an inline reply, insert it in place.
 394                                 var id = $(notice).attr('id');
 395                                 if ($("#"+id).length == 0) {
 396                                     var parentNotice = replyItem.closest('li.notice');
 397                                     replyItem.replaceWith(notice);
 398                                     SN.U.NoticeInlineReplyPlaceholder(parentNotice);
 399                                 } else {
 400                                     // Realtime came through before us...
 401                                     replyItem.remove();
 402                                 }
 403                             } else if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
 404                                 // Not a reply. If on our timeline, show it at the top!
 405
 406                                 if ($('#'+notice.id).length === 0) {
 407                                     var notice_irt_value = form.find('[name=inreplyto]').val();
 408                                     var notice_irt = '#notices_primary #notice-'+notice_irt_value;
 409                                     if($('body')[0].id == 'conversation') {
 410                                         if(notice_irt_value.length > 0 && $(notice_irt+' .notices').length < 1) {
 411                                             $(notice_irt).append('<ul class="notices"></ul>');
 412                                         }
 413                                         $($(notice_irt+' .notices')[0]).append(notice);
 414                                     }
 415                                     else {
 416                                         notices.prepend(notice);
 417                                     }
 418                                     $('#'+notice.id)
 419                                         .css({display:'none'})
 420                                         .fadeIn(2500);
 421                                     SN.U.NoticeWithAttachment($('#'+notice.id));
 422                                     SN.U.NoticeReplyTo($('#'+notice.id));
 423                                 }
 424                             } else {
 425                                 // Not on a timeline that this belongs on?
 426                                 // Just show a success message.
 427                                 // @fixme inline
 428                                 showFeedback('success', $('title', data).text());
 429                             }
 430                         }
 431                         form.resetForm();
 432                         form.find('[name=inreplyto]').val('');
 433                         form.find('.attach-status').remove();
 434                         SN.U.FormNoticeEnhancements(form);
 435                     }
 436                 },
 437                 complete: function(xhr, textStatus) {
 438                     form
 439                         .removeClass(SN.C.S.Processing)
 440                         .find('.submit')
 441                             .removeAttr(SN.C.S.Disabled)
 442                             .removeClass(SN.C.S.Disabled);
 443
 444                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 445                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 446                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 447                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 448                     form.find('[name=notice_data-geo]').attr('checked', SN.C.I.NoticeDataGeo.NDG);
 449                 }
 450             });
 451         },
 452
 453         normalizeGeoData: function(form) {
 454             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 455             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 456             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 457             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 458             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked'); // @fixme
 459
 460             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 461
 462             if (cookieValue !== null && cookieValue != 'disabled') {
 463                 cookieValue = JSON.parse(cookieValue);
 464                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 465                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 466                 if (cookieValue.NLNS) {
 467                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 468                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 469                 } else {
 470                     form.find('[name=location_ns]').val('');
 471                     form.find('[name=location_id]').val('');
 472                 }
 473             }
 474             if (cookieValue == 'disabled') {
 475                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', false).attr('checked');
 476             }
 477             else {
 478                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', true).attr('checked');
 479             }
 480
 481         },
 482         /**
 483          * Fetch an XML DOM from an XHR's response data.
 484          *
 485          * Works around unavailable responseXML when document.domain
 486          * has been modified by Meteor or other tools, in some but not
 487          * all browsers.
 488          *
 489          * @param {XMLHTTPRequest} xhr
 490          * @return DOMDocument
 491          */
 492         GetResponseXML: function(xhr) {
 493             try {
 494                 return xhr.responseXML;
 495             } catch (e) {
 496                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 497             }
 498         },
 499
 500         /**
 501          * Setup function -- DOES NOT trigger actions immediately.
 502          *
 503          * Sets up event handlers on all visible notice's reply buttons to
 504          * tweak the new-notice form with needed variables and focus it
 505          * when pushed.
 506          *
 507          * (This replaces the default reply button behavior to submit
 508          * directly to a form which comes back with a specialized page
 509          * with the form data prefilled.)
 510          *
 511          * @access private
 512          */
 513         NoticeReply: function() {
 514             if ($('#content .notice_reply').length > 0) {
 515                 $('#content .notice').each(function() { SN.U.NoticeReplyTo($(this)); });
 516             }
 517         },
 518
 519         /**
 520          * Setup function -- DOES NOT trigger actions immediately.
 521          *
 522          * Sets up event handlers on the given notice's reply button to
 523          * tweak the new-notice form with needed variables and focus it
 524          * when pushed.
 525          *
 526          * (This replaces the default reply button behavior to submit
 527          * directly to a form which comes back with a specialized page
 528          * with the form data prefilled.)
 529          *
 530          * @param {jQuery} notice: jQuery object containing one or more notices
 531          * @access private
 532          */
 533         NoticeReplyTo: function(notice) {
 534             notice.find('.notice_reply').live('click', function(e) {
 535                 e.preventDefault();
 536                 var nickname = ($('.author .nickname', notice).length > 0) ? $($('.author .nickname', notice)[0]) : $('.author .nickname.uid');
 537                 SN.U.NoticeInlineReplyTrigger(notice, '@' + nickname.text());
 538                 return false;
 539             });
 540         },
 541
 542         /**
 543          * Open up a notice's inline reply box.
 544          *
 545          * @param {jQuery} notice: jQuery object containing one notice
 546          * @param {String} initialText
 547          */
 548         NoticeInlineReplyTrigger: function(notice, initialText) {
 549             // Find the notice we're replying to...
 550             var id = $($('.notice_id', notice)[0]).text();
 551             var parentNotice = notice;
 552
 553             // Find the threaded replies view we'll be adding to...
 554             var list = notice.closest('.notices');
 555             if (list.hasClass('threaded-replies')) {
 556                 // We're replying to a reply; use reply form on the end of this list.
 557                 // We'll add our form at the end of this; grab the root notice.
 558                 parentNotice = list.closest('.notice');
 559             } else {
 560                 // We're replying to a parent notice; pull its threaded list
 561                 // and we'll add on the end of it. Will add if needed.
 562                 list = $('ul.threaded-replies', notice);
 563                 if (list.length == 0) {
 564                     list = $('<ul class="notices threaded-replies xoxo"></ul>');
 565                     notice.append(list);
 566                 }
 567             }
 568
 569             // See if the form's already open...
 570             var replyForm = $('.notice-reply-form', list);
 571
 572             var nextStep = function() {
 573                 // Override...?
 574                 replyForm.find('input[name=inreplyto]').val(id);
 575
 576                 // Set focus...
 577                 var text = replyForm.find('textarea');
 578                 if (text.length == 0) {
 579                     throw "No textarea";
 580                 }
 581                 var replyto = '';
 582                 if (initialText) {
 583                     replyto = initialText + ' ';
 584                 }
 585                 text.val(replyto + text.val().replace(RegExp(replyto, 'i'), ''));
 586                 text.data('initialText', $.trim(initialText + ''));
 587                 text.focus();
 588                 if (text[0].setSelectionRange) {
 589                     var len = text.val().length;
 590                     text[0].setSelectionRange(len,len);
 591                 }
 592             };
 593             if (replyForm.length > 0) {
 594                 // Update the existing form...
 595                 nextStep();
 596             } else {
 597                 // Remove placeholder if any
 598                 $('li.notice-reply-placeholder').remove();
 599
 600                 // Create the reply form entry at the end
 601                 var replyItem = $('li.notice-reply', list);
 602                 if (replyItem.length == 0) {
 603                     var url = $('#form_notice').attr('action');
 604                     replyItem = $('<li class="notice-reply"></li>');
 605                     $.get(url, {ajax: 1}, function(data, textStatus, xhr) {
 606                         var formEl = document._importNode($('form', data)[0], true);
 607                         replyItem.append(formEl);
 608                         list.append(replyItem);
 609
 610                         var form = replyForm = $(formEl);
 611                         SN.U.NoticeLocationAttach(form);
 612                         SN.U.FormNoticeXHR(form);
 613                         SN.U.FormNoticeEnhancements(form);
 614                         SN.U.NoticeDataAttach(form);
 615
 616                         nextStep();
 617                     });
 618                     /*
 619                     replyItem = $('<li class="notice-reply">' +
 620                                       '<form class="notice-reply-form" method="post">' +
 621                                           '<textarea name="status_textarea"></textarea>' +
 622                                           '<div class="controls">' +
 623                                           '<input type="hidden" name="token">' +
 624                                           '<input type="hidden" name="inreplyto">' +
 625                                           '<input type="submit" class="submit">' +
 626                                       '</div>' +
 627                                       '</form>' +
 628                                   '</li>');
 629                     var baseForm = $('#form_notice');
 630                     replyForm = replyItem.find('form');
 631                     replyForm.attr('action', baseForm.attr('action'));
 632                     replyForm.find('input[name="token"]').val(baseForm.find('input[name=token]').val());
 633                     replyForm.find('input[type="submit"]').val(SN.msg('reply_submit'));
 634                     list.append(replyItem);
 635
 636                     replyForm.find('textarea').blur(function() {
 637                         var textarea = $(this);
 638                         var txt = $.trim(textarea.val());
 639                         if (txt == '' || txt == textarea.data('initialText')) {
 640                             // Nothing to say? Begone!
 641                             replyItem.remove();
 642                             if (list.find('li').length > 0) {
 643                                 SN.U.NoticeInlineReplyPlaceholder(parentNotice);
 644                             } else {
 645                                 list.remove();
 646                             }
 647                         }
 648                     });
 649                     replyForm.submit(function(event) {
 650                         var form = replyForm;
 651                         $.ajax({
 652                             type: 'POST',
 653                             dataType: 'xml',
 654                             url: SN.U.RewriteAjaxAction(form.attr('action')),
 655                             data: form.serialize() + '&ajax=1',
 656                             beforeSend: function(xhr) {
 657                                 form
 658                                     .addClass(SN.C.S.Processing)
 659                                     .find('.submit')
 660                                         .addClass(SN.C.S.Disabled)
 661                                         .attr(SN.C.S.Disabled, SN.C.S.Disabled)
 662                                         .end()
 663                                     .find('textarea')
 664                                         .addClass(SN.C.S.Disabled)
 665                                         .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 666                             },
 667                             error: function (xhr, textStatus, errorThrown) {
 668                                 alert(errorThrown || textStatus);
 669                             },
 670                             success: function(data, textStatus) {
 671                                 var orig_li = $('li', data)[0];
 672                                 if (orig_li) {
 673                                     var li = document._importNode(orig_li, true);
 674                                     var id = $(li).attr('id');
 675                                     if ($("#"+id).length == 0) {
 676                                         replyItem.replaceWith(li);
 677                                         SN.U.NoticeInlineReplyPlaceholder(parentNotice);
 678                                     } else {
 679                                         // Realtime came through before us...
 680                                         replyItem.remove();
 681                                     }
 682                                 }
 683                             }
 684                         });
 685                         event.preventDefault();
 686                         return false;
 687                     });
 688                                   */
 689                 }
 690             }
 691         },
 692
 693         /**
 694          * Setup function -- DOES NOT apply immediately.
 695          *
 696          * Sets up event handlers for favor/disfavor forms to submit via XHR.
 697          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 698          */
 699         NoticeFavor: function() {
 700             $('.form_favor').live('click', function() { SN.U.FormXHR($(this)); return false; });
 701             $('.form_disfavor').live('click', function() { SN.U.FormXHR($(this)); return false; });
 702         },
 703
 704         NoticeInlineReplyPlaceholder: function(notice) {
 705             var list = notice.find('ul.threaded-replies');
 706             var placeholder = $('<li class="notice-reply-placeholder">' +
 707                                     '<input class="placeholder">' +
 708                                 '</li>');
 709             placeholder.click(function() {
 710                 SN.U.NoticeInlineReplyTrigger(notice);
 711             });
 712             placeholder.find('input').val(SN.msg('reply_placeholder'));
 713             list.append(placeholder);
 714         },
 715
 716         /**
 717          * Setup function -- DOES NOT apply immediately.
 718          *
 719          * Sets up event handlers for favor/disfavor forms to submit via XHR.
 720          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 721          */
 722         NoticeInlineReplySetup: function() {
 723             $('.threaded-replies').each(function() {
 724                 var list = $(this);
 725                 var notice = list.closest('.notice');
 726                 SN.U.NoticeInlineReplyPlaceholder(notice);
 727             });
 728         },
 729
 730         /**
 731          * Setup function -- DOES NOT trigger actions immediately.
 732          *
 733          * Sets up event handlers for repeat forms to toss up a confirmation
 734          * popout before submitting.
 735          *
 736          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 737          */
 738         NoticeRepeat: function() {
 739             $('.form_repeat').live('click', function(e) {
 740                 e.preventDefault();
 741
 742                 SN.U.NoticeRepeatConfirmation($(this));
 743                 return false;
 744             });
 745         },
 746
 747         /**
 748          * Shows a confirmation dialog box variant of the repeat button form.
 749          * This seems to use a technique where the repeat form contains
 750          * _both_ a standalone button _and_ text and buttons for a dialog.
 751          * The dialog will close after its copy of the form is submitted,
 752          * or if you click its 'close' button.
 753          *
 754          * The dialog is created by duplicating the original form and changing
 755          * its style; while clever, this is hard to generalize and probably
 756          * duplicates a lot of unnecessary HTML output.
 757          *
 758          * @fixme create confirmation dialogs through a generalized interface
 759          * that can be reused instead of hardcoded text and styles.
 760          *
 761          * @param {jQuery} form
 762          */
 763         NoticeRepeatConfirmation: function(form) {
 764             var submit_i = form.find('.submit');
 765
 766             var submit = submit_i.clone();
 767             submit
 768                 .addClass('submit_dialogbox')
 769                 .removeClass('submit');
 770             form.append(submit);
 771             submit.bind('click', function() { SN.U.FormXHR(form); return false; });
 772
 773             submit_i.hide();
 774
 775             form
 776                 .addClass('dialogbox')
 777                 .append('<button class="close">&#215;</button>')
 778                 .closest('.notice-options')
 779                     .addClass('opaque');
 780
 781             form.find('button.close').click(function(){
 782                 $(this).remove();
 783
 784                 form
 785                     .removeClass('dialogbox')
 786                     .closest('.notice-options')
 787                         .removeClass('opaque');
 788
 789                 form.find('.submit_dialogbox').remove();
 790                 form.find('.submit').show();
 791
 792                 return false;
 793             });
 794         },
 795
 796         /**
 797          * Setup function -- DOES NOT trigger actions immediately.
 798          *
 799          * Goes through all notices currently displayed and sets up attachment
 800          * handling if needed.
 801          */
 802         NoticeAttachments: function() {
 803             $('.notice a.attachment').each(function() {
 804                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 805             });
 806         },
 807
 808         /**
 809          * Setup function -- DOES NOT trigger actions immediately.
 810          *
 811          * Sets up special attachment link handling if needed. Currently this
 812          * consists only of making the "more" button used for OStatus message
 813          * cropping turn into an auto-expansion button that loads the full
 814          * text from an attachment file.
 815          *
 816          * @param {jQuery} notice
 817          */
 818         NoticeWithAttachment: function(notice) {
 819             if (notice.find('.attachment').length === 0) {
 820                 return;
 821             }
 822
 823             var attachment_more = notice.find('.attachment.more');
 824             if (attachment_more.length > 0) {
 825                 $(attachment_more[0]).click(function() {
 826                     var m = $(this);
 827                     m.addClass(SN.C.S.Processing);
 828                     $.get(m.attr('href')+'/ajax', null, function(data) {
 829                         m.parent('.entry-content').html($(data).find('#attachment_view .entry-content').html());
 830                     });
 831
 832                     return false;
 833                 }).attr('title', SN.msg('showmore_tooltip'));
 834             }
 835         },
 836
 837         /**
 838          * Setup function -- DOES NOT trigger actions immediately.
 839          *
 840          * Sets up event handlers for the file-attachment widget in the
 841          * new notice form. When a file is selected, a box will be added
 842          * below the text input showing the filename and, if supported
 843          * by the browser, a thumbnail preview.
 844          *
 845          * This preview box will also allow removing the attachment
 846          * prior to posting.
 847          *
 848          * @param {jQuery} form
 849          */
 850         NoticeDataAttach: function(form) {
 851             var NDA = form.find('input[type=file]');
 852             NDA.change(function(event) {
 853                 form.find('.attach-status').remove();
 854
 855                 var filename = $(this).val();
 856                 if (!filename) {
 857                     // No file -- we've been tricked!
 858                     return false;
 859                 }
 860
 861                 var attachStatus = $('<div class="attach-status '+SN.C.S.Success+'"><code></code> <button class="close">&#215;</button></div>');
 862                 attachStatus.find('code').text(filename);
 863                 attachStatus.find('button').click(function(){
 864                     attachStatus.remove();
 865                     NDA.val('');
 866
 867                     return false;
 868                 });
 869                 form.append(attachStatus);
 870
 871                 if (typeof this.files == "object") {
 872                     // Some newer browsers will let us fetch the files for preview.
 873                     for (var i = 0; i < this.files.length; i++) {
 874                         SN.U.PreviewAttach(form, this.files[i]);
 875                     }
 876                 }
 877             });
 878         },
 879
 880         /**
 881          * Get PHP's MAX_FILE_SIZE setting for this form;
 882          * used to apply client-side file size limit checks.
 883          *
 884          * @param {jQuery} form
 885          * @return int max size in bytes; 0 or negative means no limit
 886          */
 887         maxFileSize: function(form) {
 888             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 889             if (max) {
 890                 return parseInt(max);
 891             } else {
 892                 return 0;
 893             }
 894         },
 895
 896         /**
 897          * For browsers with FileAPI support: make a thumbnail if possible,
 898          * and append it into the attachment display widget.
 899          *
 900          * Known good:
 901          * - Firefox 3.6.6, 4.0b7
 902          * - Chrome 8.0.552.210
 903          *
 904          * Known ok metadata, can't get contents:
 905          * - Safari 5.0.2
 906          *
 907          * Known fail:
 908          * - Opera 10.63, 11 beta (no input.files interface)
 909          *
 910          * @param {jQuery} form
 911          * @param {File} file
 912          *
 913          * @todo use configured thumbnail size
 914          * @todo detect pixel size?
 915          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 916          */
 917         PreviewAttach: function(form, file) {
 918             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 919             var preview = true;
 920
 921             var blobAsDataURL;
 922             if (typeof window.createObjectURL != "undefined") {
 923                 /**
 924                  * createObjectURL lets us reference the file directly from an <img>
 925                  * This produces a compact URL with an opaque reference to the file,
 926                  * which we can reference immediately.
 927                  *
 928                  * - Firefox 3.6.6: no
 929                  * - Firefox 4.0b7: no
 930                  * - Safari 5.0.2: no
 931                  * - Chrome 8.0.552.210: works!
 932                  */
 933                 blobAsDataURL = function(blob, callback) {
 934                     callback(window.createObjectURL(blob));
 935                 }
 936             } else if (typeof window.FileReader != "undefined") {
 937                 /**
 938                  * FileAPI's FileReader can build a data URL from a blob's contents,
 939                  * but it must read the file and build it asynchronously. This means
 940                  * we'll be passing a giant data URL around, which may be inefficient.
 941                  *
 942                  * - Firefox 3.6.6: works!
 943                  * - Firefox 4.0b7: works!
 944                  * - Safari 5.0.2: no
 945                  * - Chrome 8.0.552.210: works!
 946                  */
 947                 blobAsDataURL = function(blob, callback) {
 948                     var reader = new FileReader();
 949                     reader.onload = function(event) {
 950                         callback(reader.result);
 951                     }
 952                     reader.readAsDataURL(blob);
 953                 }
 954             } else {
 955                 preview = false;
 956             }
 957
 958             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 959             if ($.inArray(file.type, imageTypes) == -1) {
 960                 // We probably don't know how to show the file.
 961                 preview = false;
 962             }
 963
 964             var maxSize = 8 * 1024 * 1024;
 965             if (file.size > maxSize) {
 966                 // Don't kill the browser trying to load some giant image.
 967                 preview = false;
 968             }
 969
 970             if (preview) {
 971                 blobAsDataURL(file, function(url) {
 972                     var img = $('<img>')
 973                         .attr('title', tooltip)
 974                         .attr('alt', tooltip)
 975                         .attr('src', url)
 976                         .attr('style', 'height: 120px');
 977                     form.find('.attach-status').append(img);
 978                 });
 979             } else {
 980                 var img = $('<div></div>').text(tooltip);
 981                 form.find('.attach-status').append(img);
 982             }
 983         },
 984
 985         /**
 986          * Setup function -- DOES NOT trigger actions immediately.
 987          *
 988          * Initializes state for the location-lookup features in the
 989          * new-notice form. Seems to set up some event handlers for
 990          * triggering lookups and using the new values.
 991          *
 992          * @param {jQuery} form
 993          *
 994          * @fixme tl;dr
 995          * @fixme there's not good visual state update here, so users have a
 996          *        hard time figuring out if it's working or fixing if it's wrong.
 997          *
 998          */
 999         NoticeLocationAttach: function(form) {
1000             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
1001             var NLat = form.find('[name=lat]')
1002             var NLon = form.find('[name=lon]')
1003             var NLNS = form.find('[name=location_ns]').val();
1004             var NLID = form.find('[name=location_id]').val();
1005             var NLN = ''; // @fixme
1006             var NDGe = form.find('[name=notice_data-geo]');
1007             var check = form.find('[name=notice_data-geo]');
1008             var label = form.find('label.notice_data-geo');
1009
1010             function removeNoticeDataGeo(error) {
1011                 label
1012                     .attr('title', jQuery.trim(label.text()))
1013                     .removeClass('checked');
1014
1015                 form.find('[name=lat]').val('');
1016                 form.find('[name=lon]').val('');
1017                 form.find('[name=location_ns]').val('');
1018                 form.find('[name=location_id]').val('');
1019                 form.find('[name=notice_data-geo]').attr('checked', false);
1020
1021                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1022
1023                 if (error) {
1024                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1025                     form.find('.geo_status_wrapper .geo_status').text(error);
1026                 } else {
1027                     form.find('.geo_status_wrapper').remove();
1028                 }
1029             }
1030
1031             function getJSONgeocodeURL(geocodeURL, data) {
1032                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1033                 $.getJSON(geocodeURL, data, function(location) {
1034                     var lns, lid;
1035
1036                     if (typeof(location.location_ns) != 'undefined') {
1037                         form.find('[name=location_ns]').val(location.location_ns);
1038                         lns = location.location_ns;
1039                     }
1040
1041                     if (typeof(location.location_id) != 'undefined') {
1042                         form.find('[name=location_id]').val(location.location_id);
1043                         lid = location.location_id;
1044                     }
1045
1046                     if (typeof(location.name) == 'undefined') {
1047                         NLN_text = data.lat + ';' + data.lon;
1048                     }
1049                     else {
1050                         NLN_text = location.name;
1051                     }
1052
1053                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1054                     label
1055                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1056
1057                     form.find('[name=lat]').val(data.lat);
1058                     form.find('[name=lon]').val(data.lon);
1059                     form.find('[name=location_ns]').val(lns);
1060                     form.find('[name=location_id]').val(lid);
1061                     form.find('[name=notice_data-geo]').attr('checked', true);
1062
1063                     var cookieValue = {
1064                         NLat: data.lat,
1065                         NLon: data.lon,
1066                         NLNS: lns,
1067                         NLID: lid,
1068                         NLN: NLN_text,
1069                         NLNU: location.url,
1070                         NDG: true
1071                     };
1072
1073                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1074                 });
1075             }
1076
1077             if (check.length > 0) {
1078                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1079                     check.attr('checked', false);
1080                 }
1081                 else {
1082                     check.attr('checked', true);
1083                 }
1084
1085                 var NGW = form.find('.notice_data-geo_wrap');
1086                 var geocodeURL = NGW.attr('title');
1087                 NGW.removeAttr('title');
1088
1089                 label
1090                     .attr('title', label.text());
1091
1092                 check.change(function() {
1093                     if (check.attr('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1094                         label
1095                             .attr('title', NoticeDataGeo_text.ShareDisable)
1096                             .addClass('checked');
1097
1098                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1099                             if (navigator.geolocation) {
1100                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1101                                 navigator.geolocation.getCurrentPosition(
1102                                     function(position) {
1103                                         form.find('[name=lat]').val(position.coords.latitude);
1104                                         form.find('[name=lon]').val(position.coords.longitude);
1105
1106                                         var data = {
1107                                             lat: position.coords.latitude,
1108                                             lon: position.coords.longitude,
1109                                             token: $('#token').val()
1110                                         };
1111
1112                                         getJSONgeocodeURL(geocodeURL, data);
1113                                     },
1114
1115                                     function(error) {
1116                                         switch(error.code) {
1117                                             case error.PERMISSION_DENIED:
1118                                                 removeNoticeDataGeo('Location permission denied.');
1119                                                 break;
1120                                             case error.TIMEOUT:
1121                                                 //$('#'+SN.C.S.NoticeDataGeo).attr('checked', false);
1122                                                 removeNoticeDataGeo('Location lookup timeout.');
1123                                                 break;
1124                                         }
1125                                     },
1126
1127                                     {
1128                                         timeout: 10000
1129                                     }
1130                                 );
1131                             }
1132                             else {
1133                                 if (NLat.length > 0 && NLon.length > 0) {
1134                                     var data = {
1135                                         lat: NLat,
1136                                         lon: NLon,
1137                                         token: $('#token').val()
1138                                     };
1139
1140                                     getJSONgeocodeURL(geocodeURL, data);
1141                                 }
1142                                 else {
1143                                     removeNoticeDataGeo();
1144                                     check.remove();
1145                                     label.remove();
1146                                 }
1147                             }
1148                         }
1149                         else {
1150                             var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1151
1152                             form.find('[name=lat]').val(cookieValue.NLat);
1153                             form.find('[name=lon]').val(cookieValue.NLon);
1154                             form.find('[name=location_ns]').val(cookieValue.NLNS);
1155                             form.find('[name=location_id]').val(cookieValue.NLID);
1156                             form.find('[name=notice_data-geo]').attr('checked', cookieValue.NDG);
1157
1158                             SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1159                             label
1160                                 .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1161                                 .addClass('checked');
1162                         }
1163                     }
1164                     else {
1165                         removeNoticeDataGeo();
1166                     }
1167                 }).change();
1168             }
1169         },
1170
1171         /**
1172          * Create or update a geolocation status widget in this notice posting form.
1173          *
1174          * @param {jQuery} form
1175          * @param {String} status
1176          * @param {String} lat (optional)
1177          * @param {String} lon (optional)
1178          * @param {String} url (optional)
1179          */
1180         NoticeGeoStatus: function(form, status, lat, lon, url)
1181         {
1182             var wrapper = form.find('.geo_status_wrapper');
1183             if (wrapper.length == 0) {
1184                 wrapper = $('<div class="'+SN.C.S.Success+' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1185                 wrapper.find('button.close').click(function() {
1186                     form.find('[name=notice_data-geo]').removeAttr('checked').change();
1187                 });
1188                 form.append(wrapper);
1189             }
1190             var label;
1191             if (url) {
1192                 label = $('<a></a>').attr('href', url);
1193             } else {
1194                 label = $('<span></span>');
1195             }
1196             label.text(status);
1197             if (lat || lon) {
1198                 var latlon = lat + ';' + lon;
1199                 label.attr('title', latlon);
1200                 if (!status) {
1201                     label.text(latlon)
1202                 }
1203             }
1204             wrapper.find('.geo_status').empty().append(label);
1205         },
1206
1207         /**
1208          * Setup function -- DOES NOT trigger actions immediately.
1209          *
1210          * Initializes event handlers for the "Send direct message" link on
1211          * profile pages, setting it up to display a dialog box when clicked.
1212          *
1213          * Unlike the repeat confirmation form, this appears to fetch
1214          * the form _from the original link target_, so the form itself
1215          * doesn't need to be in the current document.
1216          *
1217          * @fixme breaks ability to open link in new window?
1218          */
1219         NewDirectMessage: function() {
1220             NDM = $('.entity_send-a-message a');
1221             NDM.attr({'href':NDM.attr('href')+'&ajax=1'});
1222             NDM.bind('click', function() {
1223                 var NDMF = $('.entity_send-a-message form');
1224                 if (NDMF.length === 0) {
1225                     $(this).addClass(SN.C.S.Processing);
1226                     $.get(NDM.attr('href'), null, function(data) {
1227                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1228                         NDMF = $('.entity_send-a-message .form_notice');
1229                         SN.U.FormNoticeXHR(NDMF);
1230                         SN.U.FormNoticeEnhancements(NDMF);
1231                         NDMF.append('<button class="close">&#215;</button>');
1232                         $('.entity_send-a-message button').click(function(){
1233                             NDMF.hide();
1234                             return false;
1235                         });
1236                         NDM.removeClass(SN.C.S.Processing);
1237                     });
1238                 }
1239                 else {
1240                     NDMF.show();
1241                     $('.entity_send-a-message textarea').focus();
1242                 }
1243                 return false;
1244             });
1245         },
1246
1247         /**
1248          * Return a date object with the current local time on the
1249          * given year, month, and day.
1250          *
1251          * @param {number} year: 4-digit year
1252          * @param {number} month: 0 == January
1253          * @param {number} day: 1 == 1
1254          * @return {Date}
1255          */
1256         GetFullYear: function(year, month, day) {
1257             var date = new Date();
1258             date.setFullYear(year, month, day);
1259
1260             return date;
1261         },
1262
1263         /**
1264          * Some sort of object interface for storing some structured
1265          * information in a cookie.
1266          *
1267          * Appears to be used to save the last-used login nickname?
1268          * That's something that browsers usually take care of for us
1269          * these days, do we really need to do it? Does anything else
1270          * use this interface?
1271          *
1272          * @fixme what is this?
1273          * @fixme should this use non-cookie local storage when available?
1274          */
1275         StatusNetInstance: {
1276             /**
1277              * @fixme what is this?
1278              */
1279             Set: function(value) {
1280                 var SNI = SN.U.StatusNetInstance.Get();
1281                 if (SNI !== null) {
1282                     value = $.extend(SNI, value);
1283                 }
1284
1285                 $.cookie(
1286                     SN.C.S.StatusNetInstance,
1287                     JSON.stringify(value),
1288                     {
1289                         path: '/',
1290                         expires: SN.U.GetFullYear(2029, 0, 1)
1291                     });
1292             },
1293
1294             /**
1295              * @fixme what is this?
1296              */
1297             Get: function() {
1298                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1299                 if (cookieValue !== null) {
1300                     return JSON.parse(cookieValue);
1301                 }
1302                 return null;
1303             },
1304
1305             /**
1306              * @fixme what is this?
1307              */
1308             Delete: function() {
1309                 $.cookie(SN.C.S.StatusNetInstance, null);
1310             }
1311         },
1312
1313         /**
1314          * Check if the current page is a timeline where the current user's
1315          * posts should be displayed immediately on success.
1316          *
1317          * @fixme this should be done in a saner way, with machine-readable
1318          * info about what page we're looking at.
1319          *
1320          * @param {DOMElement} notice: HTML chunk with formatted notice
1321          * @return boolean
1322          */
1323         belongsOnTimeline: function(notice) {
1324             var action = $("body").attr('id');
1325             if (action == 'public') {
1326                 return true;
1327             }
1328
1329             var profileLink = $('#nav_profile a').attr('href');
1330             if (profileLink) {
1331                 var authorUrl = $(notice).find('.entry-title .author a.url').attr('href');
1332                 if (authorUrl == profileLink) {
1333                     if (action == 'all' || action == 'showstream') {
1334                         // Posts always show on your own friends and profile streams.
1335                         return true;
1336                     }
1337                 }
1338             }
1339
1340             // @fixme tag, group, reply timelines should be feasible as well.
1341             // Mismatch between id-based and name-based user/group links currently complicates
1342             // the lookup, since all our inline mentions contain the absolute links but the
1343             // UI links currently on the page use malleable names.
1344
1345             return false;
1346         }
1347     },
1348
1349     Init: {
1350         /**
1351          * If user is logged in, run setup code for the new notice form:
1352          *
1353          *  - char counter
1354          *  - AJAX submission
1355          *  - location events
1356          *  - file upload events
1357          */
1358         NoticeForm: function() {
1359             if ($('body.user_in').length > 0) {
1360                 $('.'+SN.C.S.FormNotice).each(function() {
1361                     var form = $(this);
1362                     SN.U.NoticeLocationAttach(form);
1363                     SN.U.FormNoticeXHR(form);
1364                     SN.U.FormNoticeEnhancements(form);
1365                     SN.U.NoticeDataAttach(form);
1366                 });
1367             }
1368         },
1369
1370         /**
1371          * Run setup code for notice timeline views items:
1372          *
1373          * - AJAX submission for fave/repeat/reply (if logged in)
1374          * - Attachment link extras ('more' links)
1375          */
1376         Notices: function() {
1377             if ($('body.user_in').length > 0) {
1378                 SN.U.NoticeFavor();
1379                 SN.U.NoticeRepeat();
1380                 SN.U.NoticeReply();
1381                 SN.U.NoticeInlineReplySetup();
1382             }
1383
1384             SN.U.NoticeAttachments();
1385         },
1386
1387         /**
1388          * Run setup code for user & group profile page header area if logged in:
1389          *
1390          * - AJAX submission for sub/unsub/join/leave/nudge
1391          * - AJAX form popup for direct-message
1392          */
1393         EntityActions: function() {
1394             if ($('body.user_in').length > 0) {
1395                 $('.form_user_subscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1396                 $('.form_user_unsubscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1397                 $('.form_group_join').live('click', function() { SN.U.FormXHR($(this)); return false; });
1398                 $('.form_group_leave').live('click', function() { SN.U.FormXHR($(this)); return false; });
1399                 $('.form_user_nudge').live('click', function() { SN.U.FormXHR($(this)); return false; });
1400
1401                 SN.U.NewDirectMessage();
1402             }
1403         },
1404
1405         /**
1406          * Run setup code for login form:
1407          *
1408          * - loads saved last-used-nickname from cookie
1409          * - sets event handler to save nickname to cookie on submit
1410          *
1411          * @fixme is this necessary? Browsers do their own form saving these days.
1412          */
1413         Login: function() {
1414             if (SN.U.StatusNetInstance.Get() !== null) {
1415                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1416                 if (nickname !== null) {
1417                     $('#form_login #nickname').val(nickname);
1418                 }
1419             }
1420
1421             $('#form_login').bind('submit', function() {
1422                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1423                 return true;
1424             });
1425         },
1426
1427         /**
1428          * Add logic to any file upload forms to handle file size limits,
1429          * on browsers that support basic FileAPI.
1430          */
1431         UploadForms: function () {
1432             $('input[type=file]').change(function(event) {
1433                 if (typeof this.files == "object" && this.files.length > 0) {
1434                     var size = 0;
1435                     for (var i = 0; i < this.files.length; i++) {
1436                         size += this.files[i].size;
1437                     }
1438
1439                     var max = SN.U.maxFileSize($(this.form));
1440                     if (max > 0 && size > max) {
1441                         var msg = 'File too large: maximum upload size is %d bytes.';
1442                         alert(msg.replace('%d', max));
1443
1444                         // Clear the files.
1445                         $(this).val('');
1446                         event.preventDefault();
1447                         return false;
1448                     }
1449                 }
1450             });
1451         }
1452     }
1453 };
1454
1455 /**
1456  * Run initialization functions on DOM-ready.
1457  *
1458  * Note that if we're waiting on other scripts to load, this won't happen
1459  * until that's done. To load scripts asynchronously without delaying setup,
1460  * don't start them loading until after DOM-ready time!
1461  */
1462 $(document).ready(function(){
1463     SN.Init.UploadForms();
1464     if ($('.'+SN.C.S.FormNotice).length > 0) {
1465         SN.Init.NoticeForm();
1466     }
1467     if ($('#content .notices').length > 0) {
1468         SN.Init.Notices();
1469     }
1470     if ($('#content .entity_actions').length > 0) {
1471         SN.Init.EntityActions();
1472     }
1473     if ($('#form_login').length > 0) {
1474         SN.Init.Login();
1475     }
1476 });