js/util.js

   1 /*
   2  * StatusNet - a distributed open-source microblogging tool
   3  * Copyright (C) 2008, StatusNet, Inc.
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU Affero General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU Affero General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Affero General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * @category  UI interaction
  19  * @package   StatusNet
  20  * @author    Sarven Capadisli <csarven@status.net>
  21  * @author    Evan Prodromou <evan@status.net>
  22  * @author    Brion Vibber <brion@status.net>
  23  * @copyright 2009,2010 StatusNet, Inc.
  24  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  25  * @link      http://status.net/
  26  */
  27
  28 var SN = { // StatusNet
  29     C: { // Config
  30         I: { // Init
  31             CounterBlackout: false,
  32             MaxLength: 140,
  33             PatternUsername: /^[0-9a-zA-Z\-_.]*$/,
  34             HTTP20x30x: [200, 201, 202, 203, 204, 205, 206, 300, 301, 302, 303, 304, 305, 306, 307],
  35             NoticeFormMaster: null // to be cloned from the one at top
  36         },
  37
  38         /**
  39          * @fixme are these worth the trouble? They seem to mostly just duplicate
  40          * themselves while slightly obscuring the actual selector, so it's hard
  41          * to pop over to the HTML and find something.
  42          *
  43          * In theory, minification could reduce them to shorter variable names,
  44          * but at present that doesn't happen with yui-compressor.
  45          */
  46         S: { // Selector
  47             Disabled: 'disabled',
  48             Warning: 'warning',
  49             Error: 'error',
  50             Success: 'success',
  51             Processing: 'processing',
  52             CommandResult: 'command_result',
  53             FormNotice: 'form_notice',
  54             NoticeDataGeo: 'notice_data-geo',
  55             NoticeDataGeoCookie: 'NoticeDataGeo',
  56             NoticeDataGeoSelected: 'notice_data-geo_selected',
  57             StatusNetInstance:'StatusNetInstance'
  58         }
  59     },
  60
  61     /**
  62      * Map of localized message strings exported to script from the PHP
  63      * side via Action::getScriptMessages().
  64      *
  65      * Retrieve them via SN.msg(); this array is an implementation detail.
  66      *
  67      * @access private
  68      */
  69     messages: {},
  70
  71     /**
  72      * Grabs a localized string that's been previously exported to us
  73      * from server-side code via Action::getScriptMessages().
  74      *
  75      * @example alert(SN.msg('coolplugin-failed'));
  76      *
  77      * @param {String} key: string key name to pull from message index
  78      * @return matching localized message string
  79      */
  80     msg: function(key) {
  81         if (typeof SN.messages[key] == "undefined") {
  82             return '[' + key + ']';
  83         } else {
  84             return SN.messages[key];
  85         }
  86     },
  87
  88     U: { // Utils
  89         /**
  90          * Setup function -- DOES NOT trigger actions immediately.
  91          *
  92          * Sets up event handlers on the new notice form.
  93          *
  94          * @param {jQuery} form: jQuery object whose first matching element is the form
  95          * @access private
  96          */
  97         FormNoticeEnhancements: function(form) {
  98             if (jQuery.data(form[0], 'ElementData') === undefined) {
  99                 MaxLength = form.find('.count').text();
 100                 if (typeof(MaxLength) == 'undefined') {
 101                      MaxLength = SN.C.I.MaxLength;
 102                 }
 103                 jQuery.data(form[0], 'ElementData', {MaxLength:MaxLength});
 104
 105                 SN.U.Counter(form);
 106
 107                 NDT = form.find('.notice_data-text:first');
 108
 109                 NDT.bind('keyup', function(e) {
 110                     SN.U.Counter(form);
 111                 });
 112
 113                 var delayedUpdate= function(e) {
 114                     // Cut and paste events fire *before* the operation,
 115                     // so we need to trigger an update in a little bit.
 116                     // This would be so much easier if the 'change' event
 117                     // actually fired every time the value changed. :P
 118                     window.setTimeout(function() {
 119                         SN.U.Counter(form);
 120                     }, 50);
 121                 };
 122                 // Note there's still no event for mouse-triggered 'delete'.
 123                 NDT.bind('cut', delayedUpdate)
 124                    .bind('paste', delayedUpdate);
 125             }
 126             else {
 127                 form.find('.count').text(jQuery.data(form[0], 'ElementData').MaxLength);
 128             }
 129         },
 130
 131         /**
 132          * To be called from event handlers on the notice import form.
 133          * Triggers an update of the remaining-characters counter.
 134          *
 135          * Additional counter updates will be suppressed during the
 136          * next half-second to avoid flooding the layout engine with
 137          * updates, followed by another automatic check.
 138          *
 139          * The maximum length is pulled from data established by
 140          * FormNoticeEnhancements.
 141          *
 142          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 143          * @access private
 144          */
 145         Counter: function(form) {
 146             SN.C.I.FormNoticeCurrent = form;
 147
 148             var MaxLength = jQuery.data(form[0], 'ElementData').MaxLength;
 149
 150             if (MaxLength <= 0) {
 151                 return;
 152             }
 153
 154             var remaining = MaxLength - SN.U.CharacterCount(form);
 155             var counter = form.find('.count');
 156
 157             if (remaining.toString() != counter.text()) {
 158                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 159                     if (counter.text() != String(remaining)) {
 160                         counter.text(remaining);
 161                     }
 162                     if (remaining < 0) {
 163                         form.addClass(SN.C.S.Warning);
 164                     } else {
 165                         form.removeClass(SN.C.S.Warning);
 166                     }
 167                     // Skip updates for the next 500ms.
 168                     // On slower hardware, updating on every keypress is unpleasant.
 169                     if (!SN.C.I.CounterBlackout) {
 170                         SN.C.I.CounterBlackout = true;
 171                         SN.C.I.FormNoticeCurrent = form;
 172                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 173                     }
 174                 }
 175             }
 176         },
 177
 178         /**
 179          * Pull the count of characters in the current edit field.
 180          * Plugins replacing the edit control may need to override this.
 181          *
 182          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 183          * @return number of chars
 184          */
 185         CharacterCount: function(form) {
 186             return form.find('.notice_data-text:first').val().length;
 187         },
 188
 189         /**
 190          * Called internally after the counter update blackout period expires;
 191          * runs another update to make sure we didn't miss anything.
 192          *
 193          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 194          * @access private
 195          */
 196         ClearCounterBlackout: function(form) {
 197             // Allow keyup events to poke the counter again
 198             SN.C.I.CounterBlackout = false;
 199             // Check if the string changed since we last looked
 200             SN.U.Counter(form);
 201         },
 202
 203         /**
 204          * Helper function to rewrite default HTTP form action URLs to HTTPS
 205          * so we can actually fetch them when on an SSL page in ssl=sometimes
 206          * mode.
 207          *
 208          * It would be better to output URLs that didn't hardcode protocol
 209          * and hostname in the first place...
 210          *
 211          * @param {String} url
 212          * @return string
 213          */
 214         RewriteAjaxAction: function(url) {
 215             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 216             if (document.location.protocol == 'https:' && url.substr(0, 5) == 'http:') {
 217                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 218             } else {
 219                 return url;
 220             }
 221         },
 222
 223         /**
 224          * Grabs form data and submits it asynchronously, with 'ajax=1'
 225          * parameter added to the rest.
 226          *
 227          * If a successful response includes another form, that form
 228          * will be extracted and copied in, replacing the original form.
 229          * If there's no form, the first paragraph will be used.
 230          *
 231          * This will automatically be applied on the 'submit' event for
 232          * any form with the 'ajax' class.
 233          *
 234          * @fixme can sometimes explode confusingly if returnd data is bogus
 235          * @fixme error handling is pretty vague
 236          * @fixme can't submit file uploads
 237          *
 238          * @param {jQuery} form: jQuery object whose first element is a form
 239          * @param function onSuccess: something extra to do on success
 240          *
 241          * @access public
 242          */
 243         FormXHR: function(form, onSuccess) {
 244             $.ajax({
 245                 type: 'POST',
 246                 dataType: 'xml',
 247                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 248                 data: form.serialize() + '&ajax=1',
 249                 beforeSend: function(xhr) {
 250                     form
 251                         .addClass(SN.C.S.Processing)
 252                         .find('.submit')
 253                             .addClass(SN.C.S.Disabled)
 254                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 255                 },
 256                 error: function (xhr, textStatus, errorThrown) {
 257                     // If the server end reported an error from StatusNet,
 258                     // find it -- otherwise we'll see what was reported
 259                     // from the browser.
 260                     var errorReported = null;
 261                     if (xhr.responseXML) {
 262                         errorReported = $('#error', xhr.responseXML).text();
 263                     }
 264                     alert(errorReported || errorThrown || textStatus);
 265
 266                     // Restore the form to original state.
 267                     // Hopefully. :D
 268                     form
 269                         .removeClass(SN.C.S.Processing)
 270                         .find('.submit')
 271                             .removeClass(SN.C.S.Disabled)
 272                             .removeAttr(SN.C.S.Disabled);
 273                 },
 274                 success: function(data, textStatus) {
 275                     if (typeof($('form', data)[0]) != 'undefined') {
 276                         form_new = document._importNode($('form', data)[0], true);
 277                         form.replaceWith(form_new);
 278                         if (onSuccess) {
 279                             onSuccess();
 280                         }
 281                     }
 282                     else if (typeof($('p', data)[0]) != 'undefined') {
 283                         form.replaceWith(document._importNode($('p', data)[0], true));
 284                         if (onSuccess) {
 285                             onSuccess();
 286                         }
 287                     }
 288                     else {
 289                         alert('Unknown error.');
 290                     }
 291                 }
 292             });
 293         },
 294
 295         /**
 296          * Setup function -- DOES NOT trigger actions immediately.
 297          *
 298          * Sets up event handlers for special-cased async submission of the
 299          * notice-posting form, including some pre-post validation.
 300          *
 301          * Unlike FormXHR() this does NOT submit the form immediately!
 302          * It sets up event handlers so that any method of submitting the
 303          * form (click on submit button, enter, submit() etc) will trigger
 304          * it properly.
 305          *
 306          * Also unlike FormXHR(), this system will use a hidden iframe
 307          * automatically to handle file uploads via <input type="file">
 308          * controls.
 309          *
 310          * @fixme tl;dr
 311          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 312          * @fixme error handling is unreliable
 313          * @fixme cookieValue is a global variable, but probably shouldn't be
 314          * @fixme saving the location cache cookies should be split out
 315          * @fixme some error messages are hardcoded english: needs i18n
 316          * @fixme special-case for bookmarklet is confusing and uses a global var "self". Is this ok?
 317          *
 318          * @param {jQuery} form: jQuery object whose first element is a form
 319          *
 320          * @access public
 321          */
 322         FormNoticeXHR: function(form) {
 323             SN.C.I.NoticeDataGeo = {};
 324             form.append('<input type="hidden" name="ajax" value="1"/>');
 325
 326             // Make sure we don't have a mixed HTTP/HTTPS submission...
 327             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 328
 329             /**
 330              * Show a response feedback bit under the new-notice dialog.
 331              *
 332              * @param {String} cls: CSS class name to use ('error' or 'success')
 333              * @param {String} text
 334              * @access private
 335              */
 336             var showFeedback = function(cls, text) {
 337                 form.append(
 338                     $('<p class="form_response"></p>')
 339                         .addClass(cls)
 340                         .text(text)
 341                 );
 342             };
 343
 344             /**
 345              * Hide the previous response feedback, if any.
 346              */
 347             var removeFeedback = function() {
 348                 form.find('.form_response').remove();
 349             };
 350
 351             form.ajaxForm({
 352                 dataType: 'xml',
 353                 timeout: '60000',
 354                 beforeSend: function(formData) {
 355                     if (form.find('.notice_data-text:first').val() == '') {
 356                         form.addClass(SN.C.S.Warning);
 357                         return false;
 358                     }
 359                     form
 360                         .addClass(SN.C.S.Processing)
 361                         .find('.submit')
 362                             .addClass(SN.C.S.Disabled)
 363                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 364
 365                     SN.U.normalizeGeoData(form);
 366
 367                     return true;
 368                 },
 369                 error: function (xhr, textStatus, errorThrown) {
 370                     form
 371                         .removeClass(SN.C.S.Processing)
 372                         .find('.submit')
 373                             .removeClass(SN.C.S.Disabled)
 374                             .removeAttr(SN.C.S.Disabled, SN.C.S.Disabled);
 375                     removeFeedback();
 376                     if (textStatus == 'timeout') {
 377                         // @fixme i18n
 378                         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.');
 379                     }
 380                     else {
 381                         var response = SN.U.GetResponseXML(xhr);
 382                         if ($('.'+SN.C.S.Error, response).length > 0) {
 383                             form.append(document._importNode($('.'+SN.C.S.Error, response)[0], true));
 384                         }
 385                         else {
 386                             if (parseInt(xhr.status) === 0 || jQuery.inArray(parseInt(xhr.status), SN.C.I.HTTP20x30x) >= 0) {
 387                                 form
 388                                     .resetForm()
 389                                     .find('.attach-status').remove();
 390                                 SN.U.FormNoticeEnhancements(form);
 391                             }
 392                             else {
 393                                 // @fixme i18n
 394                                 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.');
 395                             }
 396                         }
 397                     }
 398                 },
 399                 success: function(data, textStatus) {
 400                     removeFeedback();
 401                     var errorResult = $('#'+SN.C.S.Error, data);
 402                     if (errorResult.length > 0) {
 403                         showFeedback('error', errorResult.text());
 404                     }
 405                     else {
 406                         if($('body')[0].id == 'bookmarklet') {
 407                             // @fixme self is not referenced anywhere?
 408                             self.close();
 409                         }
 410
 411                         var commandResult = $('#'+SN.C.S.CommandResult, data);
 412                         if (commandResult.length > 0) {
 413                             showFeedback('success', commandResult.text());
 414                         }
 415                         else {
 416                             // New notice post was successful. If on our timeline, show it!
 417                             var notice = document._importNode($('li', data)[0], true);
 418                             var notices = $('#notices_primary .notices:first');
 419                             var replyItem = form.closest('li.notice-reply');
 420
 421                             if (replyItem.length > 0) {
 422                                 // If this is an inline reply, remove the form...
 423                                 var list = form.closest('.threaded-replies');
 424                                 var placeholder = list.find('.notice-reply-placeholder');
 425                                 replyItem.remove();
 426
 427                                 var id = $(notice).attr('id');
 428                                 if ($("#"+id).length == 0) {
 429                                     $(notice).insertBefore(placeholder);
 430                                 } else {
 431                                     // Realtime came through before us...
 432                                 }
 433
 434                                 // ...and show the placeholder form.
 435                                 placeholder.show();
 436                             } else if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
 437                                 // Not a reply. If on our timeline, show it at the top!
 438
 439                                 if ($('#'+notice.id).length === 0) {
 440                                     var notice_irt_value = form.find('[name=inreplyto]').val();
 441                                     var notice_irt = '#notices_primary #notice-'+notice_irt_value;
 442                                     if($('body')[0].id == 'conversation') {
 443                                         if(notice_irt_value.length > 0 && $(notice_irt+' .notices').length < 1) {
 444                                             $(notice_irt).append('<ul class="notices"></ul>');
 445                                         }
 446                                         $($(notice_irt+' .notices')[0]).append(notice);
 447                                     }
 448                                     else {
 449                                         notices.prepend(notice);
 450                                     }
 451                                     $('#'+notice.id)
 452                                         .css({display:'none'})
 453                                         .fadeIn(2500);
 454                                     SN.U.NoticeWithAttachment($('#'+notice.id));
 455                                     SN.U.switchInputFormTab("placeholder");
 456                                 }
 457                             } else {
 458                                 // Not on a timeline that this belongs on?
 459                                 // Just show a success message.
 460                                 // @fixme inline
 461                                 showFeedback('success', $('title', data).text());
 462                             }
 463                         }
 464                         form.resetForm();
 465                         form.find('[name=inreplyto]').val('');
 466                         form.find('.attach-status').remove();
 467                         SN.U.FormNoticeEnhancements(form);
 468                     }
 469                 },
 470                 complete: function(xhr, textStatus) {
 471                     form
 472                         .removeClass(SN.C.S.Processing)
 473                         .find('.submit')
 474                             .removeAttr(SN.C.S.Disabled)
 475                             .removeClass(SN.C.S.Disabled);
 476
 477                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 478                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 479                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 480                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 481                     form.find('[name=notice_data-geo]').attr('checked', SN.C.I.NoticeDataGeo.NDG);
 482                 }
 483             });
 484         },
 485
 486         FormProfileSearchXHR: function(form) {
 487             $.ajax({
 488                 type: 'POST',
 489                 dataType: 'xml',
 490                 url: form.attr('action'),
 491                 data: form.serialize() + '&ajax=1',
 492                 beforeSend: function(xhr) {
 493                     form
 494                         .addClass(SN.C.S.Processing)
 495                         .find('.submit')
 496                             .addClass(SN.C.S.Disabled)
 497                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 498                 },
 499                 error: function (xhr, textStatus, errorThrown) {
 500                     alert(errorThrown || textStatus);
 501                 },
 502                 success: function(data, textStatus) {
 503                     var results_placeholder = $('#profile_search_results');
 504                     if (typeof($('ul', data)[0]) != 'undefined') {
 505                         var list = document._importNode($('ul', data)[0], true);
 506                         results_placeholder.replaceWith(list);
 507                     }
 508                     else {
 509                         var _error = $('<li/>').append(document._importNode($('p', data)[0], true));
 510                         results_placeholder.html(_error);
 511                     }
 512                     form
 513                         .removeClass(SN.C.S.Processing)
 514                         .find('.submit')
 515                             .removeClass(SN.C.S.Disabled)
 516                             .attr(SN.C.S.Disabled, false);
 517                 }
 518             });
 519         },
 520
 521         FormPeopletagsXHR: function(form) {
 522             $.ajax({
 523                 type: 'POST',
 524                 dataType: 'xml',
 525                 url: form.attr('action'),
 526                 data: form.serialize() + '&ajax=1',
 527                 beforeSend: function(xhr) {
 528                     form.find('.submit')
 529                             .addClass(SN.C.S.Processing)
 530                             .addClass(SN.C.S.Disabled)
 531                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 532                 },
 533                 error: function (xhr, textStatus, errorThrown) {
 534                     alert(errorThrown || textStatus);
 535                 },
 536                 success: function(data, textStatus) {
 537                     var results_placeholder = form.parents('.entity_tags');
 538                     if (typeof($('.entity_tags', data)[0]) != 'undefined') {
 539                         var tags = document._importNode($('.entity_tags', data)[0], true);
 540                         $(tags).find('.editable').append($('<button class="peopletags_edit_button"/>'));
 541                         results_placeholder.replaceWith(tags);
 542                     } else {
 543                         results_placeholder.find('p').remove();
 544                         results_placeholder.append(document._importNode($('p', data)[0], true));
 545                         form.removeClass(SN.C.S.Processing)
 546                             .find('.submit')
 547                                 .removeClass(SN.C.S.Disabled)
 548                                 .attr(SN.C.S.Disabled, false);
 549                     }
 550                 }
 551             });
 552         },
 553
 554         normalizeGeoData: function(form) {
 555             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 556             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 557             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 558             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 559             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked'); // @fixme
 560
 561             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 562
 563             if (cookieValue !== null && cookieValue != 'disabled') {
 564                 cookieValue = JSON.parse(cookieValue);
 565                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 566                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 567                 if (cookieValue.NLNS) {
 568                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 569                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 570                 } else {
 571                     form.find('[name=location_ns]').val('');
 572                     form.find('[name=location_id]').val('');
 573                 }
 574             }
 575             if (cookieValue == 'disabled') {
 576                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', false).attr('checked');
 577             }
 578             else {
 579                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', true).attr('checked');
 580             }
 581
 582         },
 583
 584         /**
 585          * Fetch an XML DOM from an XHR's response data.
 586          *
 587          * Works around unavailable responseXML when document.domain
 588          * has been modified by Meteor or other tools, in some but not
 589          * all browsers.
 590          *
 591          * @param {XMLHTTPRequest} xhr
 592          * @return DOMDocument
 593          */
 594         GetResponseXML: function(xhr) {
 595             try {
 596                 return xhr.responseXML;
 597             } catch (e) {
 598                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 599             }
 600         },
 601
 602         /**
 603          * Setup function -- DOES NOT trigger actions immediately.
 604          *
 605          * Sets up event handlers on all visible notice's reply buttons to
 606          * tweak the new-notice form with needed variables and focus it
 607          * when pushed.
 608          *
 609          * (This replaces the default reply button behavior to submit
 610          * directly to a form which comes back with a specialized page
 611          * with the form data prefilled.)
 612          *
 613          * @access private
 614          */
 615         NoticeReply: function() {
 616             $('#content .notice_reply').live('click', function(e) {
 617                 e.preventDefault();
 618                 var notice = $(this).closest('li.notice');
 619                 SN.U.NoticeInlineReplyTrigger(notice);
 620                 return false;
 621             });
 622         },
 623
 624         /**
 625          * Stub -- kept for compat with plugins for now.
 626          * @access private
 627          */
 628         NoticeReplyTo: function(notice) {
 629         },
 630
 631         /**
 632          * Open up a notice's inline reply box.
 633          *
 634          * @param {jQuery} notice: jQuery object containing one notice
 635          * @param {String} initialText
 636          */
 637         NoticeInlineReplyTrigger: function(notice, initialText) {
 638             // Find the notice we're replying to...
 639             var id = $($('.notice_id', notice)[0]).text();
 640             var parentNotice = notice;
 641             var stripForm = true; // strip a couple things out of reply forms that are inline
 642
 643             // Find the threaded replies view we'll be adding to...
 644             var list = notice.closest('.notices');
 645             if (list.closest('.old-school').length) {
 646                 // We're replying to an old-school conversation thread;
 647                 // use the old-style ping into the top form.
 648                 SN.U.switchInputFormTab("status")
 649                 replyForm = $('#input_form_status').find('form');
 650                 stripForm = false;
 651             } else if (list.hasClass('threaded-replies')) {
 652                 // We're replying to a reply; use reply form on the end of this list.
 653                 // We'll add our form at the end of this; grab the root notice.
 654                 parentNotice = list.closest('.notice');
 655
 656                         // See if the form's already open...
 657                         var replyForm = $('.notice-reply-form', list);
 658             } else {
 659                 // We're replying to a parent notice; pull its threaded list
 660                 // and we'll add on the end of it. Will add if needed.
 661                 list = $('ul.threaded-replies', notice);
 662                 if (list.length == 0) {
 663                     SN.U.NoticeInlineReplyPlaceholder(notice);
 664                     list = $('ul.threaded-replies', notice);
 665                 } else {
 666                     var placeholder = $('li.notice-reply-placeholder', notice);
 667                     if (placeholder.length == 0) {
 668                         SN.U.NoticeInlineReplyPlaceholder(notice);
 669                     }
 670                 }
 671
 672                         // See if the form's already open...
 673                         var replyForm = $('.notice-reply-form', list);
 674             }
 675
 676             var nextStep = function() {
 677                 // Override...?
 678                 replyForm.find('input[name=inreplyto]').val(id);
 679                 if (stripForm) {
 680                         // Don't do this for old-school reply form, as they don't come back!
 681                         replyForm.find('#notice_to').attr('disabled', 'disabled').hide();
 682                     replyForm.find('#notice_private').attr('disabled', 'disabled').hide();
 683                     replyForm.find('label[for=notice_to]').hide();
 684                     replyForm.find('label[for=notice_private]').hide();
 685                 }
 686
 687                 // Set focus...
 688                 var text = replyForm.find('textarea');
 689                 if (text.length == 0) {
 690                     throw "No textarea";
 691                 }
 692                 var replyto = '';
 693                 if (initialText) {
 694                     replyto = initialText + ' ';
 695                 }
 696                 text.val(replyto + text.val().replace(RegExp(replyto, 'i'), ''));
 697                 text.data('initialText', $.trim(initialText + ''));
 698                 text.focus();
 699                 if (text[0].setSelectionRange) {
 700                     var len = text.val().length;
 701                     text[0].setSelectionRange(len,len);
 702                 }
 703             };
 704             if (replyForm.length > 0) {
 705                 // Update the existing form...
 706                 nextStep();
 707             } else {
 708                 // Hide the placeholder...
 709                 var placeholder = list.find('li.notice-reply-placeholder').hide();
 710
 711                 // Create the reply form entry at the end
 712                 var replyItem = $('li.notice-reply', list);
 713                 if (replyItem.length == 0) {
 714                     replyItem = $('<li class="notice-reply"></li>');
 715
 716                     var intermediateStep = function(formMaster) {
 717                         var formEl = document._importNode(formMaster, true);
 718                         replyItem.append(formEl);
 719                         list.append(replyItem); // *after* the placeholder
 720
 721                         var form = replyForm = $(formEl);
 722                         SN.Init.NoticeFormSetup(form);
 723
 724                         nextStep();
 725                     };
 726                     if (SN.C.I.NoticeFormMaster) {
 727                         // We've already saved a master copy of the form.
 728                         // Clone it in!
 729                         intermediateStep(SN.C.I.NoticeFormMaster);
 730                     } else {
 731                         // Fetch a fresh copy of the notice form over AJAX.
 732                         // Warning: this can have a delay, which looks bad.
 733                         // @fixme this fallback may or may not work
 734                         var url = $('#form_notice').attr('action');
 735                         $.get(url, {ajax: 1}, function(data, textStatus, xhr) {
 736                             intermediateStep($('form', data)[0]);
 737                         });
 738                     }
 739                 }
 740             }
 741         },
 742
 743         NoticeInlineReplyPlaceholder: function(notice) {
 744             var list = notice.find('ul.threaded-replies');
 745             if (list.length == 0) {
 746                 list = $('<ul class="notices threaded-replies xoxo"></ul>');
 747                 notice.append(list);
 748                 list = notice.find('ul.threaded-replies');
 749             }
 750             var placeholder = $('<li class="notice-reply-placeholder">' +
 751                                     '<input class="placeholder" />' +
 752                                 '</li>');
 753             placeholder.find('input')
 754                 .val(SN.msg('reply_placeholder'));
 755             list.append(placeholder);
 756         },
 757
 758         /**
 759          * Setup function -- DOES NOT apply immediately.
 760          *
 761          * Sets up event handlers for inline reply mini-form placeholders.
 762          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 763          */
 764         NoticeInlineReplySetup: function() {
 765             $('li.notice-reply-placeholder input')
 766                 .live('focus', function() {
 767                     var notice = $(this).closest('li.notice');
 768                     SN.U.NoticeInlineReplyTrigger(notice);
 769                     return false;
 770                 });
 771             $('li.notice-reply-comments a')
 772                 .live('click', function() {
 773                     var url = $(this).attr('href');
 774                     var area = $(this).closest('.threaded-replies');
 775                     $.get(url, {ajax: 1}, function(data, textStatus, xhr) {
 776                         var replies = $('.threaded-replies', data);
 777                         if (replies.length) {
 778                             area.replaceWith(document._importNode(replies[0], true));
 779                         }
 780                     });
 781                     return false;
 782                 });
 783         },
 784
 785         /**
 786          * Setup function -- DOES NOT trigger actions immediately.
 787          *
 788          * Sets up event handlers for repeat forms to toss up a confirmation
 789          * popout before submitting.
 790          *
 791          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 792          *
 793          */
 794         NoticeRepeat: function() {
 795             $('.form_repeat').live('click', function(e) {
 796                 e.preventDefault();
 797
 798                 SN.U.NoticeRepeatConfirmation($(this));
 799                 return false;
 800             });
 801         },
 802
 803         /**
 804          * Shows a confirmation dialog box variant of the repeat button form.
 805          * This seems to use a technique where the repeat form contains
 806          * _both_ a standalone button _and_ text and buttons for a dialog.
 807          * The dialog will close after its copy of the form is submitted,
 808          * or if you click its 'close' button.
 809          *
 810          * The dialog is created by duplicating the original form and changing
 811          * its style; while clever, this is hard to generalize and probably
 812          * duplicates a lot of unnecessary HTML output.
 813          *
 814          * @fixme create confirmation dialogs through a generalized interface
 815          * that can be reused instead of hardcoded text and styles.
 816          *
 817          * @param {jQuery} form
 818          */
 819         NoticeRepeatConfirmation: function(form) {
 820             var submit_i = form.find('.submit');
 821
 822             var submit = submit_i.clone();
 823             submit
 824                 .addClass('submit_dialogbox')
 825                 .removeClass('submit');
 826             form.append(submit);
 827             submit.bind('click', function() { SN.U.FormXHR(form); return false; });
 828
 829             submit_i.hide();
 830
 831             form
 832                 .addClass('dialogbox')
 833                 .append('<button class="close">&#215;</button>')
 834                 .closest('.notice-options')
 835                     .addClass('opaque');
 836
 837             form.find('button.close').click(function(){
 838                 $(this).remove();
 839
 840                 form
 841                     .removeClass('dialogbox')
 842                     .closest('.notice-options')
 843                         .removeClass('opaque');
 844
 845                 form.find('.submit_dialogbox').remove();
 846                 form.find('.submit').show();
 847
 848                 return false;
 849             });
 850         },
 851
 852         /**
 853          * Setup function -- DOES NOT trigger actions immediately.
 854          *
 855          * Goes through all notices currently displayed and sets up attachment
 856          * handling if needed.
 857          */
 858         NoticeAttachments: function() {
 859             $('.notice a.attachment').each(function() {
 860                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 861             });
 862         },
 863
 864         /**
 865          * Setup function -- DOES NOT trigger actions immediately.
 866          *
 867          * Sets up special attachment link handling if needed. Currently this
 868          * consists only of making the "more" button used for OStatus message
 869          * cropping turn into an auto-expansion button that loads the full
 870          * text from an attachment file.
 871          *
 872          * @param {jQuery} notice
 873          */
 874         NoticeWithAttachment: function(notice) {
 875             if (notice.find('.attachment').length === 0) {
 876                 return;
 877             }
 878
 879             var attachment_more = notice.find('.attachment.more');
 880             if (attachment_more.length > 0) {
 881                 $(attachment_more[0]).click(function() {
 882                     var m = $(this);
 883                     m.addClass(SN.C.S.Processing);
 884                     $.get(m.attr('href')+'/ajax', null, function(data) {
 885                         m.parent('.entry-content').html($(data).find('#attachment_view .entry-content').html());
 886                     });
 887
 888                     return false;
 889                 }).attr('title', SN.msg('showmore_tooltip'));
 890             }
 891         },
 892
 893         /**
 894          * Setup function -- DOES NOT trigger actions immediately.
 895          *
 896          * Sets up event handlers for the file-attachment widget in the
 897          * new notice form. When a file is selected, a box will be added
 898          * below the text input showing the filename and, if supported
 899          * by the browser, a thumbnail preview.
 900          *
 901          * This preview box will also allow removing the attachment
 902          * prior to posting.
 903          *
 904          * @param {jQuery} form
 905          */
 906         NoticeDataAttach: function(form) {
 907             var NDA = form.find('input[type=file]');
 908             NDA.change(function(event) {
 909                 form.find('.attach-status').remove();
 910
 911                 var filename = $(this).val();
 912                 if (!filename) {
 913                     // No file -- we've been tricked!
 914                     return false;
 915                 }
 916
 917                 var attachStatus = $('<div class="attach-status '+SN.C.S.Success+'"><code></code> <button class="close">&#215;</button></div>');
 918                 attachStatus.find('code').text(filename);
 919                 attachStatus.find('button').click(function(){
 920                     attachStatus.remove();
 921                     NDA.val('');
 922
 923                     return false;
 924                 });
 925                 form.append(attachStatus);
 926
 927                 if (typeof this.files == "object") {
 928                     // Some newer browsers will let us fetch the files for preview.
 929                     for (var i = 0; i < this.files.length; i++) {
 930                         SN.U.PreviewAttach(form, this.files[i]);
 931                     }
 932                 }
 933             });
 934         },
 935
 936         /**
 937          * Get PHP's MAX_FILE_SIZE setting for this form;
 938          * used to apply client-side file size limit checks.
 939          *
 940          * @param {jQuery} form
 941          * @return int max size in bytes; 0 or negative means no limit
 942          */
 943         maxFileSize: function(form) {
 944             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 945             if (max) {
 946                 return parseInt(max);
 947             } else {
 948                 return 0;
 949             }
 950         },
 951
 952         /**
 953          * For browsers with FileAPI support: make a thumbnail if possible,
 954          * and append it into the attachment display widget.
 955          *
 956          * Known good:
 957          * - Firefox 3.6.6, 4.0b7
 958          * - Chrome 8.0.552.210
 959          *
 960          * Known ok metadata, can't get contents:
 961          * - Safari 5.0.2
 962          *
 963          * Known fail:
 964          * - Opera 10.63, 11 beta (no input.files interface)
 965          *
 966          * @param {jQuery} form
 967          * @param {File} file
 968          *
 969          * @todo use configured thumbnail size
 970          * @todo detect pixel size?
 971          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 972          */
 973         PreviewAttach: function(form, file) {
 974             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 975             var preview = true;
 976
 977             var blobAsDataURL;
 978             if (typeof window.createObjectURL != "undefined") {
 979                 /**
 980                  * createObjectURL lets us reference the file directly from an <img>
 981                  * This produces a compact URL with an opaque reference to the file,
 982                  * which we can reference immediately.
 983                  *
 984                  * - Firefox 3.6.6: no
 985                  * - Firefox 4.0b7: no
 986                  * - Safari 5.0.2: no
 987                  * - Chrome 8.0.552.210: works!
 988                  */
 989                 blobAsDataURL = function(blob, callback) {
 990                     callback(window.createObjectURL(blob));
 991                 }
 992             } else if (typeof window.FileReader != "undefined") {
 993                 /**
 994                  * FileAPI's FileReader can build a data URL from a blob's contents,
 995                  * but it must read the file and build it asynchronously. This means
 996                  * we'll be passing a giant data URL around, which may be inefficient.
 997                  *
 998                  * - Firefox 3.6.6: works!
 999                  * - Firefox 4.0b7: works!
1000                  * - Safari 5.0.2: no
1001                  * - Chrome 8.0.552.210: works!
1002                  */
1003                 blobAsDataURL = function(blob, callback) {
1004                     var reader = new FileReader();
1005                     reader.onload = function(event) {
1006                         callback(reader.result);
1007                     }
1008                     reader.readAsDataURL(blob);
1009                 }
1010             } else {
1011                 preview = false;
1012             }
1013
1014             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
1015             if ($.inArray(file.type, imageTypes) == -1) {
1016                 // We probably don't know how to show the file.
1017                 preview = false;
1018             }
1019
1020             var maxSize = 8 * 1024 * 1024;
1021             if (file.size > maxSize) {
1022                 // Don't kill the browser trying to load some giant image.
1023                 preview = false;
1024             }
1025
1026             if (preview) {
1027                 blobAsDataURL(file, function(url) {
1028                     var img = $('<img>')
1029                         .attr('title', tooltip)
1030                         .attr('alt', tooltip)
1031                         .attr('src', url)
1032                         .attr('style', 'height: 120px');
1033                     form.find('.attach-status').append(img);
1034                 });
1035             } else {
1036                 var img = $('<div></div>').text(tooltip);
1037                 form.find('.attach-status').append(img);
1038             }
1039         },
1040
1041         /**
1042          * Setup function -- DOES NOT trigger actions immediately.
1043          *
1044          * Initializes state for the location-lookup features in the
1045          * new-notice form. Seems to set up some event handlers for
1046          * triggering lookups and using the new values.
1047          *
1048          * @param {jQuery} form
1049          *
1050          * @fixme tl;dr
1051          * @fixme there's not good visual state update here, so users have a
1052          *        hard time figuring out if it's working or fixing if it's wrong.
1053          *
1054          */
1055         NoticeLocationAttach: function(form) {
1056             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
1057             var NLat = form.find('[name=lat]')
1058             var NLon = form.find('[name=lon]')
1059             var NLNS = form.find('[name=location_ns]').val();
1060             var NLID = form.find('[name=location_id]').val();
1061             var NLN = ''; // @fixme
1062             var NDGe = form.find('[name=notice_data-geo]');
1063             var check = form.find('[name=notice_data-geo]');
1064             var label = form.find('label.notice_data-geo');
1065
1066             function removeNoticeDataGeo(error) {
1067                 label
1068                     .attr('title', jQuery.trim(label.text()))
1069                     .removeClass('checked');
1070
1071                 form.find('[name=lat]').val('');
1072                 form.find('[name=lon]').val('');
1073                 form.find('[name=location_ns]').val('');
1074                 form.find('[name=location_id]').val('');
1075                 form.find('[name=notice_data-geo]').attr('checked', false);
1076
1077                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1078
1079                 if (error) {
1080                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1081                     form.find('.geo_status_wrapper .geo_status').text(error);
1082                 } else {
1083                     form.find('.geo_status_wrapper').remove();
1084                 }
1085             }
1086
1087             function getJSONgeocodeURL(geocodeURL, data) {
1088                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1089                 $.getJSON(geocodeURL, data, function(location) {
1090                     var lns, lid;
1091
1092                     if (typeof(location.location_ns) != 'undefined') {
1093                         form.find('[name=location_ns]').val(location.location_ns);
1094                         lns = location.location_ns;
1095                     }
1096
1097                     if (typeof(location.location_id) != 'undefined') {
1098                         form.find('[name=location_id]').val(location.location_id);
1099                         lid = location.location_id;
1100                     }
1101
1102                     if (typeof(location.name) == 'undefined') {
1103                         NLN_text = data.lat + ';' + data.lon;
1104                     }
1105                     else {
1106                         NLN_text = location.name;
1107                     }
1108
1109                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1110                     label
1111                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1112
1113                     form.find('[name=lat]').val(data.lat);
1114                     form.find('[name=lon]').val(data.lon);
1115                     form.find('[name=location_ns]').val(lns);
1116                     form.find('[name=location_id]').val(lid);
1117                     form.find('[name=notice_data-geo]').attr('checked', true);
1118
1119                     var cookieValue = {
1120                         NLat: data.lat,
1121                         NLon: data.lon,
1122                         NLNS: lns,
1123                         NLID: lid,
1124                         NLN: NLN_text,
1125                         NLNU: location.url,
1126                         NDG: true
1127                     };
1128
1129                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1130                 });
1131             }
1132
1133             if (check.length > 0) {
1134                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1135                     check.attr('checked', false);
1136                 }
1137                 else {
1138                     check.attr('checked', true);
1139                 }
1140
1141                 var NGW = form.find('.notice_data-geo_wrap');
1142                 var geocodeURL = NGW.attr('data-api');
1143
1144                 label
1145                     .attr('title', label.text());
1146
1147                 check.change(function() {
1148                     if (check.attr('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1149                         label
1150                             .attr('title', NoticeDataGeo_text.ShareDisable)
1151                             .addClass('checked');
1152
1153                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1154                             if (navigator.geolocation) {
1155                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1156                                 navigator.geolocation.getCurrentPosition(
1157                                     function(position) {
1158                                         form.find('[name=lat]').val(position.coords.latitude);
1159                                         form.find('[name=lon]').val(position.coords.longitude);
1160
1161                                         var data = {
1162                                             lat: position.coords.latitude,
1163                                             lon: position.coords.longitude,
1164                                             token: $('#token').val()
1165                                         };
1166
1167                                         getJSONgeocodeURL(geocodeURL, data);
1168                                     },
1169
1170                                     function(error) {
1171                                         switch(error.code) {
1172                                             case error.PERMISSION_DENIED:
1173                                                 removeNoticeDataGeo('Location permission denied.');
1174                                                 break;
1175                                             case error.TIMEOUT:
1176                                                 //$('#'+SN.C.S.NoticeDataGeo).attr('checked', false);
1177                                                 removeNoticeDataGeo('Location lookup timeout.');
1178                                                 break;
1179                                         }
1180                                     },
1181
1182                                     {
1183                                         timeout: 10000
1184                                     }
1185                                 );
1186                             }
1187                             else {
1188                                 if (NLat.length > 0 && NLon.length > 0) {
1189                                     var data = {
1190                                         lat: NLat,
1191                                         lon: NLon,
1192                                         token: $('#token').val()
1193                                     };
1194
1195                                     getJSONgeocodeURL(geocodeURL, data);
1196                                 }
1197                                 else {
1198                                     removeNoticeDataGeo();
1199                                     check.remove();
1200                                     label.remove();
1201                                 }
1202                             }
1203                         }
1204                         else {
1205                             var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1206
1207                             form.find('[name=lat]').val(cookieValue.NLat);
1208                             form.find('[name=lon]').val(cookieValue.NLon);
1209                             form.find('[name=location_ns]').val(cookieValue.NLNS);
1210                             form.find('[name=location_id]').val(cookieValue.NLID);
1211                             form.find('[name=notice_data-geo]').attr('checked', cookieValue.NDG);
1212
1213                             SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1214                             label
1215                                 .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1216                                 .addClass('checked');
1217                         }
1218                     }
1219                     else {
1220                         removeNoticeDataGeo();
1221                     }
1222                 }).change();
1223             }
1224         },
1225
1226         /**
1227          * Create or update a geolocation status widget in this notice posting form.
1228          *
1229          * @param {jQuery} form
1230          * @param {String} status
1231          * @param {String} lat (optional)
1232          * @param {String} lon (optional)
1233          * @param {String} url (optional)
1234          */
1235         NoticeGeoStatus: function(form, status, lat, lon, url)
1236         {
1237             var wrapper = form.find('.geo_status_wrapper');
1238             if (wrapper.length == 0) {
1239                 wrapper = $('<div class="'+SN.C.S.Success+' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1240                 wrapper.find('button.close').click(function() {
1241                     form.find('[name=notice_data-geo]').removeAttr('checked').change();
1242                     return false;
1243                 });
1244                 form.append(wrapper);
1245             }
1246             var label;
1247             if (url) {
1248                 label = $('<a></a>').attr('href', url);
1249             } else {
1250                 label = $('<span></span>');
1251             }
1252             label.text(status);
1253             if (lat || lon) {
1254                 var latlon = lat + ';' + lon;
1255                 label.attr('title', latlon);
1256                 if (!status) {
1257                     label.text(latlon)
1258                 }
1259             }
1260             wrapper.find('.geo_status').empty().append(label);
1261         },
1262
1263         /**
1264          * Setup function -- DOES NOT trigger actions immediately.
1265          *
1266          * Initializes event handlers for the "Send direct message" link on
1267          * profile pages, setting it up to display a dialog box when clicked.
1268          *
1269          * Unlike the repeat confirmation form, this appears to fetch
1270          * the form _from the original link target_, so the form itself
1271          * doesn't need to be in the current document.
1272          *
1273          * @fixme breaks ability to open link in new window?
1274          */
1275         NewDirectMessage: function() {
1276             NDM = $('.entity_send-a-message a');
1277             NDM.attr({'href':NDM.attr('href')+'&ajax=1'});
1278             NDM.bind('click', function() {
1279                 var NDMF = $('.entity_send-a-message form');
1280                 if (NDMF.length === 0) {
1281                     $(this).addClass(SN.C.S.Processing);
1282                     $.get(NDM.attr('href'), null, function(data) {
1283                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1284                         NDMF = $('.entity_send-a-message .form_notice');
1285                         SN.U.FormNoticeXHR(NDMF);
1286                         SN.U.FormNoticeEnhancements(NDMF);
1287                         NDMF.append('<button class="close">&#215;</button>');
1288                         $('.entity_send-a-message button').click(function(){
1289                             NDMF.hide();
1290                             return false;
1291                         });
1292                         NDM.removeClass(SN.C.S.Processing);
1293                     });
1294                 }
1295                 else {
1296                     NDMF.show();
1297                     $('.entity_send-a-message textarea').focus();
1298                 }
1299                 return false;
1300             });
1301         },
1302
1303         /**
1304          * Return a date object with the current local time on the
1305          * given year, month, and day.
1306          *
1307          * @param {number} year: 4-digit year
1308          * @param {number} month: 0 == January
1309          * @param {number} day: 1 == 1
1310          * @return {Date}
1311          */
1312         GetFullYear: function(year, month, day) {
1313             var date = new Date();
1314             date.setFullYear(year, month, day);
1315
1316             return date;
1317         },
1318
1319         /**
1320          * Some sort of object interface for storing some structured
1321          * information in a cookie.
1322          *
1323          * Appears to be used to save the last-used login nickname?
1324          * That's something that browsers usually take care of for us
1325          * these days, do we really need to do it? Does anything else
1326          * use this interface?
1327          *
1328          * @fixme what is this?
1329          * @fixme should this use non-cookie local storage when available?
1330          */
1331         StatusNetInstance: {
1332             /**
1333              * @fixme what is this?
1334              */
1335             Set: function(value) {
1336                 var SNI = SN.U.StatusNetInstance.Get();
1337                 if (SNI !== null) {
1338                     value = $.extend(SNI, value);
1339                 }
1340
1341                 $.cookie(
1342                     SN.C.S.StatusNetInstance,
1343                     JSON.stringify(value),
1344                     {
1345                         path: '/',
1346                         expires: SN.U.GetFullYear(2029, 0, 1)
1347                     });
1348             },
1349
1350             /**
1351              * @fixme what is this?
1352              */
1353             Get: function() {
1354                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1355                 if (cookieValue !== null) {
1356                     return JSON.parse(cookieValue);
1357                 }
1358                 return null;
1359             },
1360
1361             /**
1362              * @fixme what is this?
1363              */
1364             Delete: function() {
1365                 $.cookie(SN.C.S.StatusNetInstance, null);
1366             }
1367         },
1368
1369         /**
1370          * Check if the current page is a timeline where the current user's
1371          * posts should be displayed immediately on success.
1372          *
1373          * @fixme this should be done in a saner way, with machine-readable
1374          * info about what page we're looking at.
1375          *
1376          * @param {DOMElement} notice: HTML chunk with formatted notice
1377          * @return boolean
1378          */
1379         belongsOnTimeline: function(notice) {
1380             var action = $("body").attr('id');
1381             if (action == 'public') {
1382                 return true;
1383             }
1384
1385             var profileLink = $('#nav_profile a').attr('href');
1386             if (profileLink) {
1387                 var authorUrl = $(notice).find('.vcard.author a.url').attr('href');
1388                 if (authorUrl == profileLink) {
1389                     if (action == 'all' || action == 'showstream') {
1390                         // Posts always show on your own friends and profile streams.
1391                         return true;
1392                     }
1393                 }
1394             }
1395
1396             // @fixme tag, group, reply timelines should be feasible as well.
1397             // Mismatch between id-based and name-based user/group links currently complicates
1398             // the lookup, since all our inline mentions contain the absolute links but the
1399             // UI links currently on the page use malleable names.
1400
1401             return false;
1402         },
1403
1404         /**
1405          * Switch to another active input sub-form.
1406          * This will hide the current form (if any), show the new one, and
1407          * update the input type tab selection state.
1408          *
1409          * @param {String} tag
1410          */
1411         switchInputFormTab: function(tag) {
1412             // The one that's current isn't current anymore
1413             $('.input_form_nav_tab.current').removeClass('current');
1414             if (tag == 'placeholder') {
1415                 // Hack: when showing the placeholder, mark the tab
1416                 // as current for 'Status'.
1417                 $('#input_form_nav_status').addClass('current');
1418             } else {
1419                 $('#input_form_nav_'+tag).addClass('current');
1420             }
1421
1422             // Don't remove 'current' if we also have the "nonav" class.
1423             // An example would be the message input form. removing
1424             // 'current' will cause the form to vanish from the page.
1425             var nonav = $('.input_form.current.nonav');
1426             if (nonav.length > 0) {
1427                 return;
1428             }
1429
1430             $('.input_form.current').removeClass('current');
1431             $('#input_form_'+tag)
1432                 .addClass('current')
1433                 .find('.ajax-notice').each(function() {
1434                     var form = $(this);
1435                     SN.Init.NoticeFormSetup(form);
1436                 })
1437                 .find('.notice_data-text').focus();
1438         },
1439
1440         showMoreMenuItems: function(menuid) {
1441             $('#'+menuid+' .more_link').remove();
1442             var selector = '#'+menuid+' .extended_menu';
1443             var extended = $(selector);
1444             extended.removeClass('extended_menu');
1445             return void(0);
1446         }
1447     },
1448
1449     Init: {
1450         /**
1451          * If user is logged in, run setup code for the new notice form:
1452          *
1453          *  - char counter
1454          *  - AJAX submission
1455          *  - location events
1456          *  - file upload events
1457          */
1458         NoticeForm: function() {
1459             if ($('body.user_in').length > 0) {
1460                 // SN.Init.NoticeFormSetup() will get run
1461                 // when forms get displayed for the first time...
1462
1463                 // Hack to initialize the placeholder at top
1464                 $('#input_form_placeholder input.placeholder').focus(function() {
1465                     SN.U.switchInputFormTab("status");
1466                 });
1467
1468                 // Make inline reply forms self-close when clicking out.
1469                 $('body').bind('click', function(e) {
1470                     var currentForm = $('#content .input_forms div.current');
1471                     if (currentForm.length > 0) {
1472                         if ($('#content .input_forms').has(e.target).length == 0) {
1473                             // If all fields are empty, switch back to the placeholder.
1474                             var fields = currentForm.find('textarea, input[type=text], input[type=""]');
1475                             var anything = false;
1476                             fields.each(function() {
1477                                 anything = anything || $(this).val();
1478                             });
1479                             if (!anything) {
1480                                 SN.U.switchInputFormTab("placeholder");
1481                             }
1482                         }
1483                     }
1484
1485                     var openReplies = $('li.notice-reply');
1486                     if (openReplies.length > 0) {
1487                         var target = $(e.target);
1488                         openReplies.each(function() {
1489                             // Did we click outside this one?
1490                             var replyItem = $(this);
1491                             if (replyItem.has(e.target).length == 0) {
1492                                 var textarea = replyItem.find('.notice_data-text:first');
1493                                 var cur = $.trim(textarea.val());
1494                                 // Only close if there's been no edit.
1495                                 if (cur == '' || cur == textarea.data('initialText')) {
1496                                     var parentNotice = replyItem.closest('li.notice');
1497                                     replyItem.remove();
1498                                     parentNotice.find('li.notice-reply-placeholder').show();
1499                                 }
1500                             }
1501                         });
1502                     }
1503                 });
1504
1505                 // Infield labels for notice form inputs.
1506                 $('.input_forms fieldset fieldset label').inFieldLabels({ fadeOpacity:0 });
1507
1508             }
1509         },
1510
1511         /**
1512          * Encapsulate notice form setup for a single form.
1513          * Plugins can add extra setup by monkeypatching this
1514          * function.
1515          *
1516          * @param {jQuery} form
1517          */
1518         NoticeFormSetup: function(form) {
1519             if (!form.data('NoticeFormSetup')) {
1520                 SN.U.NoticeLocationAttach(form);
1521                 SN.U.FormNoticeXHR(form);
1522                 SN.U.FormNoticeEnhancements(form);
1523                 SN.U.NoticeDataAttach(form);
1524                 form.data('NoticeFormSetup', true);
1525             }
1526         },
1527
1528         /**
1529          * Run setup code for notice timeline views items:
1530          *
1531          * - AJAX submission for fave/repeat/reply (if logged in)
1532          * - Attachment link extras ('more' links)
1533          */
1534         Notices: function() {
1535             if ($('body.user_in').length > 0) {
1536                 var masterForm = $('.form_notice:first');
1537                 if (masterForm.length > 0) {
1538                     SN.C.I.NoticeFormMaster = document._importNode(masterForm[0], true);
1539                 }
1540                 SN.U.NoticeRepeat();
1541                 SN.U.NoticeReply();
1542                 SN.U.NoticeInlineReplySetup();
1543             }
1544
1545             SN.U.NoticeAttachments();
1546         },
1547
1548         /**
1549          * Run setup code for user & group profile page header area if logged in:
1550          *
1551          * - AJAX submission for sub/unsub/join/leave/nudge
1552          * - AJAX form popup for direct-message
1553          */
1554         EntityActions: function() {
1555             if ($('body.user_in').length > 0) {
1556                 $('.form_user_subscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1557                 $('.form_user_unsubscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1558                 $('.form_group_join').live('click', function() { SN.U.FormXHR($(this)); return false; });
1559                 $('.form_group_leave').live('click', function() { SN.U.FormXHR($(this)); return false; });
1560                 $('.form_user_nudge').live('click', function() { SN.U.FormXHR($(this)); return false; });
1561                 $('.form_peopletag_subscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1562                 $('.form_peopletag_unsubscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1563                 $('.form_user_add_peopletag').live('click', function() { SN.U.FormXHR($(this)); return false; });
1564                 $('.form_user_remove_peopletag').live('click', function() { SN.U.FormXHR($(this)); return false; });
1565
1566                 SN.U.NewDirectMessage();
1567             }
1568         },
1569
1570         ProfileSearch: function() {
1571             if ($('body.user_in').length > 0) {
1572                 $('.form_peopletag_edit_user_search input.submit').live('click', function() {
1573                     SN.U.FormProfileSearchXHR($(this).parents('form')); return false;
1574                 });
1575             }
1576         },
1577
1578         /**
1579          * Run setup code for login form:
1580          *
1581          * - loads saved last-used-nickname from cookie
1582          * - sets event handler to save nickname to cookie on submit
1583          *
1584          * @fixme is this necessary? Browsers do their own form saving these days.
1585          */
1586         Login: function() {
1587             if (SN.U.StatusNetInstance.Get() !== null) {
1588                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1589                 if (nickname !== null) {
1590                     $('#form_login #nickname').val(nickname);
1591                 }
1592             }
1593
1594             $('#form_login').bind('submit', function() {
1595                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1596                 return true;
1597             });
1598         },
1599
1600         /**
1601          * Called when a people tag edit box is shown in the interface
1602          *
1603          * - loads the jQuery UI autocomplete plugin
1604          * - sets event handlers for tag completion
1605          *
1606          */
1607         PeopletagAutocomplete: function(txtBox) {
1608             var split = function(val) {
1609                 return val.split( /\s+/ );
1610             }
1611             var extractLast = function(term) {
1612                 return split(term).pop();
1613             }
1614
1615             // don't navigate away from the field on tab when selecting an item
1616             txtBox.live( "keydown", function( event ) {
1617                 if ( event.keyCode === $.ui.keyCode.TAB &&
1618                         $(this).data( "autocomplete" ).menu.active ) {
1619                     event.preventDefault();
1620                 }
1621             }).autocomplete({
1622                 minLength: 0,
1623                 source: function(request, response) {
1624                             // delegate back to autocomplete, but extract the last term
1625                             response($.ui.autocomplete.filter(
1626                                     SN.C.PtagACData, extractLast(request.term)));
1627                     },
1628                     focus: function() {
1629                         return false;
1630                 },
1631                     select: function(event, ui) {
1632                             var terms = split(this.value);
1633                             terms.pop();
1634                             terms.push(ui.item.value);
1635                             terms.push("");
1636                             this.value = terms.join(" ");
1637                             return false;
1638                     }
1639             }).data('autocomplete')._renderItem = function(ul, item) {
1640                     // FIXME: with jQuery UI you cannot have it highlight the match
1641                     var _l = '<a class="ptag-ac-line-tag">' + item.tag
1642                           + ' <em class="privacy_mode">' + item.mode + '</em>'
1643                           + '<span class="freq">' + item.freq + '</span></a>'
1644
1645                             return $("<li/>")
1646                                 .addClass('mode-' + item.mode)
1647                             .addClass('ptag-ac-line')
1648                             .data("item.autocomplete", item)
1649                             .append(_l)
1650                             .appendTo(ul);
1651                     }
1652         },
1653
1654         /**
1655          * Run setup for the ajax people tags editor
1656          *
1657          * - show edit button
1658          * - set event handle for click on edit button
1659          *   - loads people tag autocompletion data if not already present
1660          *     or if it is stale.
1661          *
1662          */
1663         PeopleTags: function() {
1664             $('.user_profile_tags .editable').append($('<button class="peopletags_edit_button"/>'));
1665
1666             $('.peopletags_edit_button').live('click', function() {
1667                 var form = $(this).parents('dd').eq(0).find('form');
1668                 // We can buy time from the above animation
1669
1670                 $.ajax({
1671                     url: _peopletagAC,
1672                     dataType: 'json',
1673                     data: {token: $('#token').val()},
1674                     ifModified: true,
1675                     success: function(data) {
1676                         // item.label is used to match
1677                         for (i=0; i < data.length; i++) {
1678                             data[i].label = data[i].tag;
1679                         }
1680
1681                         SN.C.PtagACData = data;
1682                         SN.Init.PeopletagAutocomplete(form.find('#tags'));
1683                     }
1684                 });
1685
1686                 $(this).parents('ul').eq(0).fadeOut(200, function() {form.fadeIn(200).find('input#tags')});
1687             });
1688
1689             $('.user_profile_tags form .submit').live('click', function() {
1690                 SN.U.FormPeopletagsXHR($(this).parents('form')); return false;
1691             });
1692         },
1693
1694         /**
1695          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1696          */
1697         AjaxForms: function() {
1698             $('form.ajax').live('submit', function() {
1699                 SN.U.FormXHR($(this));
1700                 return false;
1701             });
1702             $('form.ajax input[type=submit]').live('click', function() {
1703                 // Some forms rely on knowing which submit button was clicked.
1704                 // Save a hidden input field which'll be picked up during AJAX
1705                 // submit...
1706                 var button = $(this);
1707                 var form = button.closest('form');
1708                 form.find('.hidden-submit-button').remove();
1709                 $('<input class="hidden-submit-button" type="hidden" />')
1710                     .attr('name', button.attr('name'))
1711                     .val(button.val())
1712                     .appendTo(form);
1713             });
1714         },
1715
1716         /**
1717          * Add logic to any file upload forms to handle file size limits,
1718          * on browsers that support basic FileAPI.
1719          */
1720         UploadForms: function () {
1721             $('input[type=file]').change(function(event) {
1722                 if (typeof this.files == "object" && this.files.length > 0) {
1723                     var size = 0;
1724                     for (var i = 0; i < this.files.length; i++) {
1725                         size += this.files[i].size;
1726                     }
1727
1728                     var max = SN.U.maxFileSize($(this.form));
1729                     if (max > 0 && size > max) {
1730                         var msg = 'File too large: maximum upload size is %d bytes.';
1731                         alert(msg.replace('%d', max));
1732
1733                         // Clear the files.
1734                         $(this).val('');
1735                         event.preventDefault();
1736                         return false;
1737                     }
1738                 }
1739             });
1740         },
1741
1742         CheckBoxes: function() {
1743             $("span[class='checkbox-wrapper']").addClass("unchecked");
1744             $(".checkbox-wrapper").click(function(){
1745                 if($(this).children("input").attr("checked")){
1746                     // uncheck
1747                     $(this).children("input").attr({checked: ""});
1748                     $(this).removeClass("checked");
1749                     $(this).addClass("unchecked");
1750                     $(this).children("label").text("Private?");
1751                 }else{
1752                     // check
1753                     $(this).children("input").attr({checked: "checked"});
1754                     $(this).removeClass("unchecked");
1755                     $(this).addClass("checked");
1756                     $(this).children("label").text("Private");
1757                 }
1758             });
1759         }
1760     }
1761 };
1762
1763 /**
1764  * Run initialization functions on DOM-ready.
1765  *
1766  * Note that if we're waiting on other scripts to load, this won't happen
1767  * until that's done. To load scripts asynchronously without delaying setup,
1768  * don't start them loading until after DOM-ready time!
1769  */
1770 $(document).ready(function(){
1771     SN.Init.AjaxForms();
1772     SN.Init.UploadForms();
1773     SN.Init.CheckBoxes();
1774     if ($('.'+SN.C.S.FormNotice).length > 0) {
1775         SN.Init.NoticeForm();
1776     }
1777     if ($('#content .notices').length > 0) {
1778         SN.Init.Notices();
1779     }
1780     if ($('#content .entity_actions').length > 0) {
1781         SN.Init.EntityActions();
1782     }
1783     if ($('#form_login').length > 0) {
1784         SN.Init.Login();
1785     }
1786     if ($('#profile_search_results').length > 0) {
1787         SN.Init.ProfileSearch();
1788     }
1789     if ($('.user_profile_tags .editable').length > 0) {
1790         SN.Init.PeopleTags();
1791     }
1792 });
1793