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