js/util.js

   1 /*
   2  * StatusNet - a distributed open-source microblogging tool
   3  * Copyright (C) 2008, StatusNet, Inc.
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU Affero General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU Affero General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Affero General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * @category  UI interaction
  19  * @package   StatusNet
  20  * @author    Sarven Capadisli <csarven@status.net>
  21  * @author    Evan Prodromou <evan@status.net>
  22  * @author    Brion Vibber <brion@status.net>
  23  * @copyright 2009,2010 StatusNet, Inc.
  24  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  25  * @link      http://status.net/
  26  */
  27
  28 var SN = { // StatusNet
  29     C: { // Config
  30         I: { // Init
  31             CounterBlackout: false,
  32             MaxLength: 140,
  33             PatternUsername: /^[0-9a-zA-Z\-_.]*$/,
  34             HTTP20x30x: [200, 201, 202, 203, 204, 205, 206, 300, 301, 302, 303, 304, 305, 306, 307],
  35         },
  36
  37         /**
  38          * @fixme are these worth the trouble? They seem to mostly just duplicate
  39          * themselves while slightly obscuring the actual selector, so it's hard
  40          * to pop over to the HTML and find something.
  41          *
  42          * In theory, minification could reduce them to shorter variable names,
  43          * but at present that doesn't happen with yui-compressor.
  44          */
  45         S: { // Selector
  46             Disabled: 'disabled',
  47             Warning: 'warning',
  48             Error: 'error',
  49             Success: 'success',
  50             Processing: 'processing',
  51             CommandResult: 'command_result',
  52             FormNotice: 'form_notice',
  53             NoticeDataGeo: 'notice_data-geo',
  54             NoticeDataGeoCookie: 'NoticeDataGeo',
  55             NoticeDataGeoSelected: 'notice_data-geo_selected',
  56             StatusNetInstance: 'StatusNetInstance'
  57         }
  58     },
  59
  60     V: {    // Variables
  61     },
  62
  63     /**
  64      * list of callbacks, categorized into _callbacks['event_name'] = [ callback_function_1, callback_function_2 ]
  65      *
  66      * @access private
  67      */
  68     _callbacks: {},
  69
  70     /**
  71      * Map of localized message strings exported to script from the PHP
  72      * side via Action::getScriptMessages().
  73      *
  74      * Retrieve them via SN.msg(); this array is an implementation detail.
  75      *
  76      * @access private
  77      */
  78     messages: {},
  79
  80     /**
  81      * Grabs a localized string that's been previously exported to us
  82      * from server-side code via Action::getScriptMessages().
  83      *
  84      * @example alert(SN.msg('coolplugin-failed'));
  85      *
  86      * @param {String} key: string key name to pull from message index
  87      * @return matching localized message string
  88      */
  89     msg: function (key) {
  90         if (SN.messages[key] === undefined) {
  91             return '[' + key + ']';
  92         }
  93         return SN.messages[key];
  94     },
  95
  96     U: { // Utils
  97         /**
  98          * Setup function -- DOES NOT trigger actions immediately.
  99          *
 100          * Sets up event handlers on the new notice form.
 101          *
 102          * @param {jQuery} form: jQuery object whose first matching element is the form
 103          * @access private
 104          */
 105         FormNoticeEnhancements: function (form) {
 106             if ($.data(form[0], 'ElementData') === undefined) {
 107                 var MaxLength = form.find('.count').text();
 108                 if (MaxLength === undefined) {
 109                     MaxLength = SN.C.I.MaxLength;
 110                 }
 111                 $.data(form[0], 'ElementData', {MaxLength: MaxLength});
 112
 113                 SN.U.Counter(form);
 114
 115                 var NDT = form.find('.notice_data-text:first');
 116
 117                 NDT.on('keyup', function (e) {
 118                     SN.U.Counter(form);
 119                 });
 120
 121                 var delayedUpdate = function (e) {
 122                     // Cut and paste events fire *before* the operation,
 123                     // so we need to trigger an update in a little bit.
 124                     // This would be so much easier if the 'change' event
 125                     // actually fired every time the value changed. :P
 126                     window.setTimeout(function () {
 127                         SN.U.Counter(form);
 128                     }, 50);
 129                 };
 130                 // Note there's still no event for mouse-triggered 'delete'.
 131                 NDT.on('cut', delayedUpdate)
 132                     .on('paste', delayedUpdate);
 133             } else {
 134                 form.find('.count').text($.data(form[0], 'ElementData').MaxLength);
 135             }
 136         },
 137
 138         /**
 139          * To be called from event handlers on the notice import form.
 140          * Triggers an update of the remaining-characters counter.
 141          *
 142          * Additional counter updates will be suppressed during the
 143          * next half-second to avoid flooding the layout engine with
 144          * updates, followed by another automatic check.
 145          *
 146          * The maximum length is pulled from data established by
 147          * FormNoticeEnhancements.
 148          *
 149          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 150          * @access private
 151          */
 152         Counter: function (form) {
 153             SN.C.I.FormNoticeCurrent = form;
 154
 155             var MaxLength = $.data(form[0], 'ElementData').MaxLength;
 156
 157             if (MaxLength <= 0) {
 158                 return;
 159             }
 160
 161             var remaining = MaxLength - SN.U.CharacterCount(form);
 162             var counter = form.find('.count');
 163
 164             if (remaining.toString() != counter.text()) {
 165                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 166                     if (counter.text() != String(remaining)) {
 167                         counter.text(remaining);
 168                     }
 169                     if (remaining < 0) {
 170                         form.addClass(SN.C.S.Warning);
 171                     } else {
 172                         form.removeClass(SN.C.S.Warning);
 173                     }
 174                     // Skip updates for the next 500ms.
 175                     // On slower hardware, updating on every keypress is unpleasant.
 176                     if (!SN.C.I.CounterBlackout) {
 177                         SN.C.I.CounterBlackout = true;
 178                         SN.C.I.FormNoticeCurrent = form;
 179                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 180                     }
 181                 }
 182             }
 183         },
 184
 185         /**
 186          * Pull the count of characters in the current edit field.
 187          * Plugins replacing the edit control may need to override this.
 188          *
 189          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 190          * @return number of chars
 191          */
 192         CharacterCount: function (form) {
 193             return form.find('.notice_data-text:first').val().length;
 194         },
 195
 196         /**
 197          * Called internally after the counter update blackout period expires;
 198          * runs another update to make sure we didn't miss anything.
 199          *
 200          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 201          * @access private
 202          */
 203         ClearCounterBlackout: function (form) {
 204             // Allow keyup events to poke the counter again
 205             SN.C.I.CounterBlackout = false;
 206             // Check if the string changed since we last looked
 207             SN.U.Counter(form);
 208         },
 209
 210         /**
 211          * Helper function to rewrite default HTTP form action URLs to HTTPS
 212          * so we can actually fetch them when on an SSL page in ssl=sometimes
 213          * mode.
 214          *
 215          * It would be better to output URLs that didn't hardcode protocol
 216          * and hostname in the first place...
 217          *
 218          * @param {String} url
 219          * @return string
 220          */
 221         RewriteAjaxAction: function (url) {
 222             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 223             if (document.location.protocol === 'https:' && url.substr(0, 5) === 'http:') {
 224                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 225             }
 226             return url;
 227         },
 228
 229         FormNoticeUniqueID: function (form) {
 230             var oldId = form.attr('id');
 231             var newId = 'form_notice_' + Math.floor(Math.random()*999999999);
 232             var attrs = ['name', 'for', 'id'];
 233             for (var key in attrs) {
 234                 if (form.attr(attrs[key]) === undefined) {
 235                     continue;
 236                 }
 237                 form.attr(attrs[key], form.attr(attrs[key]).replace(oldId, newId));
 238             }
 239             for (var key in attrs) {
 240                 form.find("[" + attrs[key] + "*='" + oldId + "']").each(function () {
 241                         if ($(this).attr(attrs[key]) === undefined) {
 242                             return; // since we're inside the each(function () { ... });
 243                         }
 244                         var newAttr = $(this).attr(attrs[key]).replace(oldId, newId);
 245                         $(this).attr(attrs[key], newAttr);
 246                     });
 247             }
 248         },
 249
 250         /**
 251          * Grabs form data and submits it asynchronously, with 'ajax=1'
 252          * parameter added to the rest.
 253          *
 254          * If a successful response includes another form, that form
 255          * will be extracted and copied in, replacing the original form.
 256          * If there's no form, the first paragraph will be used.
 257          *
 258          * This will automatically be applied on the 'submit' event for
 259          * any form with the 'ajax' class.
 260          *
 261          * @fixme can sometimes explode confusingly if returnd data is bogus
 262          * @fixme error handling is pretty vague
 263          * @fixme can't submit file uploads
 264          *
 265          * @param {jQuery} form: jQuery object whose first element is a form
 266          * @param function onSuccess: something extra to do on success
 267          *
 268          * @access public
 269          */
 270         FormXHR: function (form, onSuccess) {
 271             $.ajax({
 272                 type: 'POST',
 273                 dataType: 'xml',
 274                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 275                 data: form.serialize() + '&ajax=1',
 276                 beforeSend: function (xhr) {
 277                     form
 278                         .addClass(SN.C.S.Processing)
 279                         .find('.submit')
 280                             .addClass(SN.C.S.Disabled)
 281                             .prop(SN.C.S.Disabled, true);
 282                 },
 283                 error: function (xhr, textStatus, errorThrown) {
 284                     // If the server end reported an error from StatusNet,
 285                     // find it -- otherwise we'll see what was reported
 286                     // from the browser.
 287                     var errorReported = null;
 288                     if (xhr.responseXML) {
 289                         errorReported = $('#error', xhr.responseXML).text();
 290                     }
 291                     window.alert(errorReported || errorThrown || textStatus);
 292
 293                     // Restore the form to original state.
 294                     // Hopefully. :D
 295                     form
 296                         .removeClass(SN.C.S.Processing)
 297                         .find('.submit')
 298                             .removeClass(SN.C.S.Disabled)
 299                             .prop(SN.C.S.Disabled, false);
 300                 },
 301                 success: function (data, textStatus) {
 302                     if ($('form', data)[0] !== undefined) {
 303                         var form_new = document._importNode($('form', data)[0], true);
 304                         form.replaceWith(form_new);
 305                         if (onSuccess) {
 306                             onSuccess();
 307                         }
 308                     } else if ($('p', data)[0] !== undefined) {
 309                         form.replaceWith(document._importNode($('p', data)[0], true));
 310                         if (onSuccess) {
 311                             onSuccess();
 312                         }
 313                     } else {
 314                         window.alert('Unknown error.');
 315                     }
 316                 }
 317             });
 318         },
 319
 320         /**
 321          * Setup function -- DOES NOT trigger actions immediately.
 322          *
 323          * Sets up event handlers for special-cased async submission of the
 324          * notice-posting form, including some pre-post validation.
 325          *
 326          * Unlike FormXHR() this does NOT submit the form immediately!
 327          * It sets up event handlers so that any method of submitting the
 328          * form (click on submit button, enter, submit() etc) will trigger
 329          * it properly.
 330          *
 331          * Also unlike FormXHR(), this system will use a hidden iframe
 332          * automatically to handle file uploads via <input type="file">
 333          * controls.
 334          *
 335          * @fixme tl;dr
 336          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 337          * @fixme error handling is unreliable
 338          * @fixme cookieValue is a global variable, but probably shouldn't be
 339          * @fixme saving the location cache cookies should be split out
 340          * @fixme some error messages are hardcoded english: needs i18n
 341          *
 342          * @param {jQuery} form: jQuery object whose first element is a form
 343          *
 344          * @access public
 345          */
 346         FormNoticeXHR: function (form) {
 347             SN.C.I.NoticeDataGeo = {};
 348             form.append('<input type="hidden" name="ajax" value="1"/>');
 349
 350             // Make sure we don't have a mixed HTTP/HTTPS submission...
 351             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 352
 353             /**
 354              * Hide the previous response feedback, if any.
 355              */
 356             var removeFeedback = function () {
 357                 form.find('.form_response').remove();
 358             };
 359
 360             form.ajaxForm({
 361                 dataType: 'xml',
 362                 timeout: '60000',
 363                 beforeSend: function (formData) {
 364                     if (form.find('.notice_data-text:first').val() == '') {
 365                         form.addClass(SN.C.S.Warning);
 366                         return false;
 367                     }
 368                     form
 369                         .addClass(SN.C.S.Processing)
 370                         .find('.submit')
 371                             .addClass(SN.C.S.Disabled)
 372                             .prop(SN.C.S.Disabled, true);
 373
 374                     SN.U.normalizeGeoData(form);
 375
 376                     return true;
 377                 },
 378                 error: function (xhr, textStatus, errorThrown) {
 379                     form
 380                         .removeClass(SN.C.S.Processing)
 381                         .find('.submit')
 382                             .removeClass(SN.C.S.Disabled)
 383                             .prop(SN.C.S.Disabled, false);
 384                     removeFeedback();
 385                     if (textStatus == 'timeout') {
 386                         // @fixme i18n
 387                         SN.U.showFeedback(form, 'error', 'Sorry! We had trouble sending your notice. The servers are overloaded. Please try again, and contact the site administrator if this problem persists.');
 388                     } else {
 389                         var response = SN.U.GetResponseXML(xhr);
 390                         if ($('.' + SN.C.S.Error, response).length > 0) {
 391                             form.append(document._importNode($('.' + SN.C.S.Error, response)[0], true));
 392                         } else {
 393                             if (parseInt(xhr.status) === 0 || $.inArray(parseInt(xhr.status), SN.C.I.HTTP20x30x) >= 0) {
 394                                 form
 395                                     .resetForm()
 396                                     .find('.attach-status').remove();
 397                                 SN.U.FormNoticeEnhancements(form);
 398                             } else {
 399                                 // @fixme i18n
 400                                 SN.U.showFeedback(form, 'error', '(Sorry! We had trouble sending your notice (' + xhr.status + ' ' + xhr.statusText + '). Please report the problem to the site administrator if this happens again.');
 401                             }
 402                         }
 403                     }
 404                 },
 405                 success: function (data, textStatus) {
 406                     removeFeedback();
 407                     var errorResult = $('#' + SN.C.S.Error, data);
 408                     if (errorResult.length > 0) {
 409                         SN.U.showFeedback(form, 'error', errorResult.text());
 410                     } else {
 411                         SN.E.ajaxNoticePosted(form, data, textStatus);
 412                     }
 413                 },
 414                 complete: function (xhr, textStatus) {
 415                     form
 416                         .removeClass(SN.C.S.Processing)
 417                         .find('.submit')
 418                             .prop(SN.C.S.Disabled, false)
 419                             .removeClass(SN.C.S.Disabled);
 420
 421                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 422                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 423                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 424                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 425                     form.find('[name=notice_data-geo]').prop('checked', SN.C.I.NoticeDataGeo.NDG);
 426                 }
 427             });
 428         },
 429
 430         FormProfileSearchXHR: function (form) {
 431             $.ajax({
 432                 type: 'POST',
 433                 dataType: 'xml',
 434                 url: form.attr('action'),
 435                 data: form.serialize() + '&ajax=1',
 436                 beforeSend: function (xhr) {
 437                     form
 438                         .addClass(SN.C.S.Processing)
 439                         .find('.submit')
 440                             .addClass(SN.C.S.Disabled)
 441                             .prop(SN.C.S.Disabled, true);
 442                 },
 443                 error: function (xhr, textStatus, errorThrown) {
 444                     window.alert(errorThrown || textStatus);
 445                 },
 446                 success: function (data, textStatus) {
 447                     var results_placeholder = $('#profile_search_results');
 448                     if ($('ul', data)[0] !== undefined) {
 449                         var list = document._importNode($('ul', data)[0], true);
 450                         results_placeholder.replaceWith(list);
 451                     } else {
 452                         var _error = $('<li/>').append(document._importNode($('p', data)[0], true));
 453                         results_placeholder.html(_error);
 454                     }
 455                     form
 456                         .removeClass(SN.C.S.Processing)
 457                         .find('.submit')
 458                             .removeClass(SN.C.S.Disabled)
 459                             .prop(SN.C.S.Disabled, false);
 460                 }
 461             });
 462         },
 463
 464         FormPeopletagsXHR: function (form) {
 465             $.ajax({
 466                 type: 'POST',
 467                 dataType: 'xml',
 468                 url: form.attr('action'),
 469                 data: form.serialize() + '&ajax=1',
 470                 beforeSend: function (xhr) {
 471                     form.find('.submit')
 472                             .addClass(SN.C.S.Processing)
 473                             .addClass(SN.C.S.Disabled)
 474                             .prop(SN.C.S.Disabled, true);
 475                 },
 476                 error: function (xhr, textStatus, errorThrown) {
 477                     window.alert(errorThrown || textStatus);
 478                 },
 479                 success: function (data, textStatus) {
 480                     var results_placeholder = form.parents('.entity_tags');
 481                     if ($('.entity_tags', data)[0] !== undefined) {
 482                         var tags = document._importNode($('.entity_tags', data)[0], true);
 483                         $(tags).find('.editable').append($('<button class="peopletags_edit_button"/>'));
 484                         results_placeholder.replaceWith(tags);
 485                     } else {
 486                         results_placeholder.find('p').remove();
 487                         results_placeholder.append(document._importNode($('p', data)[0], true));
 488                         form.removeClass(SN.C.S.Processing)
 489                             .find('.submit')
 490                                 .removeClass(SN.C.S.Disabled)
 491                                 .prop(SN.C.S.Disabled, false);
 492                     }
 493                 }
 494             });
 495         },
 496
 497         normalizeGeoData: function (form) {
 498             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 499             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 500             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 501             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 502             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked'); // @fixme (does this still need to be fixed somehow?)
 503
 504             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 505
 506             if (cookieValue !== undefined && cookieValue != 'disabled') {
 507                 cookieValue = JSON.parse(cookieValue);
 508                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 509                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 510                 if (cookieValue.NLNS) {
 511                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 512                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 513                 } else {
 514                     form.find('[name=location_ns]').val('');
 515                     form.find('[name=location_id]').val('');
 516                 }
 517             }
 518             if (cookieValue == 'disabled') {
 519                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', false).prop('checked');
 520             } else {
 521                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', true).prop('checked');
 522             }
 523
 524         },
 525
 526         /**
 527          * Fetch an XML DOM from an XHR's response data.
 528          *
 529          * Works around unavailable responseXML when document.domain
 530          * has been modified by Meteor or other tools, in some but not
 531          * all browsers.
 532          *
 533          * @param {XMLHTTPRequest} xhr
 534          * @return DOMDocument
 535          */
 536         GetResponseXML: function (xhr) {
 537             try {
 538                 return xhr.responseXML;
 539             } catch (e) {
 540                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 541             }
 542         },
 543
 544         /**
 545          * Setup function -- DOES NOT trigger actions immediately.
 546          *
 547          * Sets up event handlers on all visible notice's option <a> elements
 548          * with the "popup" class so they behave as expected with AJAX.
 549          *
 550          * (without javascript the link goes to a page that expects you to verify
 551          * the action through a form)
 552          *
 553          * @access private
 554          */
 555         NoticeOptionsAjax: function () {
 556             $(document).on('click', '.notice-options > a.popup', function (e) {
 557                 e.preventDefault();
 558                 var noticeEl = $(this).closest('.notice');
 559                 $.ajax({
 560                     url: $(this).attr('href'),
 561                     data: {ajax: 1},
 562                     success: function (data, textStatus, xhr) {
 563                         SN.U.NoticeOptionPopup(data, noticeEl);
 564                     },
 565                 });
 566                 return false;
 567             });
 568         },
 569
 570         NoticeOptionPopup: function (data, noticeEl) {
 571             title = $('head > title', data).text();
 572             body = $('body', data).html();
 573             dialog = $(body).dialog({
 574                     height: "auto",
 575                     width: "auto",
 576                     modal: true,
 577                     resizable: true,
 578                     title: title,
 579                 });
 580         },
 581
 582         /**
 583          * Setup function -- DOES NOT trigger actions immediately.
 584          *
 585          * Sets up event handlers on all visible notice's reply buttons to
 586          * tweak the new-notice form with needed variables and focus it
 587          * when pushed.
 588          *
 589          * (This replaces the default reply button behavior to submit
 590          * directly to a form which comes back with a specialized page
 591          * with the form data prefilled.)
 592          *
 593          * @access private
 594          */
 595         NoticeReply: function () {
 596             $(document).on('click', '#content .notice_reply', function (e) {
 597                 e.preventDefault();
 598                 var notice = $(this).closest('li.notice');
 599                 SN.U.NoticeInlineReplyTrigger(notice);
 600                 return false;
 601             });
 602         },
 603
 604         /**
 605          * Stub -- kept for compat with plugins for now.
 606          * @access private
 607          */
 608         NoticeReplyTo: function (notice) {
 609         },
 610
 611         /**
 612          * Open up a notice's inline reply box.
 613          *
 614          * @param {jQuery} notice: jQuery object containing one notice
 615          * @param {String} initialText
 616          */
 617         NoticeInlineReplyTrigger: function (notice, initialText) {
 618             // Find the notice we're replying to...
 619             var id = $($('.notice_id', notice)[0]).text();
 620             var replyForm;
 621             var parentNotice = notice;
 622             var stripForm = true; // strip a couple things out of reply forms that are inline
 623
 624             var list = notice.find('.threaded-replies');
 625             if (list.length == 0) {
 626                 list = notice.closest('.threaded-replies');
 627             }
 628             if (list.length == 0) {
 629                 list = $('<ul class="notices threaded-replies xoxo"></ul>');
 630                 notice.append(list);
 631                 list = notice.find('.threaded-replies');
 632             }
 633
 634             var nextStep = function () {
 635                 // Override...?
 636                 replyForm.find('input[name=inreplyto]').val(id);
 637                 if (stripForm) {
 638                     // Don't do this for old-school reply form, as they don't come back!
 639                     replyForm.find('#notice_to').prop('disabled', true).hide();
 640                     replyForm.find('#notice_private').prop('disabled', true).hide();
 641                     replyForm.find('label[for=notice_to]').hide();
 642                     replyForm.find('label[for=notice_private]').hide();
 643                 }
 644                 replyItem.show();
 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(new 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             // Create the reply form entry
 665             var replyItem = $('li.notice-reply', list);
 666             if (replyItem.length == 0) {
 667                 replyItem = $('<li class="notice-reply"></li>');
 668             }
 669             replyForm = replyItem.children('form');
 670             if (replyForm.length == 0) {
 671                 // Let's try another trick to avoid fetching by URL
 672                 var noticeForm = $('#input_form_status > form');
 673                 if (noticeForm.length == 0) {
 674                     // No notice form found on the page, so let's just
 675                     // fetch a fresh copy of the notice form over AJAX.
 676                     $.ajax({
 677                         url: SN.V.urlNewNotice,
 678                         data: {ajax: 1, inreplyto: id},
 679                         success: function (data, textStatus, xhr) {
 680                             var formEl = document._importNode($('form', data)[0], true);
 681                             replyForm = $(formEl);
 682                             replyItem.append(replyForm);
 683                             list.append(replyItem);
 684
 685                             SN.Init.NoticeFormSetup(replyForm);
 686                             nextStep();
 687                         },
 688                     });
 689                     // We do everything relevant in 'success' above
 690                     return;
 691                 }
 692                 replyForm = noticeForm.clone();
 693                 SN.Init.NoticeFormSetup(replyForm);
 694                 replyItem.append(replyForm);
 695                 list.append(replyItem);
 696             }
 697             // replyForm is set, we're not fetching by URL...
 698             // Next setp is to configure in-reply-to etc.
 699             nextStep();
 700         },
 701
 702         /**
 703          * Setup function -- DOES NOT apply immediately.
 704          *
 705          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 706          */
 707         NoticeInlineReplySetup: function () {
 708             // Expand conversation links
 709             $(document).on('click', 'li.notice-reply-comments a', function () {
 710                     var url = $(this).attr('href');
 711                     var area = $(this).closest('.threaded-replies');
 712                     $.ajax({
 713                         url: url,
 714                         data: {ajax: 1},
 715                         success: function (data, textStatus, xhr) {
 716                             var replies = $('.threaded-replies', data);
 717                             if (replies.length) {
 718                                 area.replaceWith(document._importNode(replies[0], true));
 719                             }
 720                         },
 721                     });
 722                     return false;
 723                 });
 724         },
 725
 726         /**
 727          * Setup function -- DOES NOT trigger actions immediately.
 728          *
 729          * Sets up event handlers for repeat forms to toss up a confirmation
 730          * popout before submitting.
 731          *
 732          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 733          *
 734          */
 735         NoticeRepeat: function () {
 736             $('body').on('click', '.form_repeat', function (e) {
 737                 e.preventDefault();
 738
 739                 SN.U.NoticeRepeatConfirmation($(this));
 740                 return false;
 741             });
 742         },
 743
 744         /**
 745          * Shows a confirmation dialog box variant of the repeat button form.
 746          * This seems to use a technique where the repeat form contains
 747          * _both_ a standalone button _and_ text and buttons for a dialog.
 748          * The dialog will close after its copy of the form is submitted,
 749          * or if you click its 'close' button.
 750          *
 751          * The dialog is created by duplicating the original form and changing
 752          * its style; while clever, this is hard to generalize and probably
 753          * duplicates a lot of unnecessary HTML output.
 754          *
 755          * @fixme create confirmation dialogs through a generalized interface
 756          * that can be reused instead of hardcoded text and styles.
 757          *
 758          * @param {jQuery} form
 759          */
 760         NoticeRepeatConfirmation: function (form) {
 761             var submit_i = form.find('.submit');
 762
 763             var submit = submit_i.clone();
 764             submit
 765                 .addClass('submit_dialogbox')
 766                 .removeClass('submit');
 767             form.append(submit);
 768             submit.on('click', function () { SN.U.FormXHR(form); return false; });
 769
 770             submit_i.hide();
 771
 772             form
 773                 .addClass('dialogbox')
 774                 .append('<button class="close" title="' + SN.msg('popup_close_button') + '">&#215;</button>')
 775                 .closest('.notice-options')
 776                     .addClass('opaque');
 777
 778             form.find('button.close').click(function () {
 779                 $(this).remove();
 780
 781                 form
 782                     .removeClass('dialogbox')
 783                     .closest('.notice-options')
 784                         .removeClass('opaque');
 785
 786                 form.find('.submit_dialogbox').remove();
 787                 form.find('.submit').show();
 788
 789                 return false;
 790             });
 791         },
 792
 793         /**
 794          * Setup function -- DOES NOT trigger actions immediately.
 795          *
 796          * Goes through all notices currently displayed and sets up attachment
 797          * handling if needed.
 798          */
 799         NoticeAttachments: function () {
 800             $('.notice a.attachment').each(function () {
 801                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 802             });
 803         },
 804
 805         /**
 806          * Setup function -- DOES NOT trigger actions immediately.
 807          *
 808          * Sets up special attachment link handling if needed. Currently this
 809          * consists only of making the "more" button used for OStatus message
 810          * cropping turn into an auto-expansion button that loads the full
 811          * text from an attachment file.
 812          *
 813          * @param {jQuery} notice
 814          */
 815         NoticeWithAttachment: function (notice) {
 816             if (notice.find('.attachment').length === 0) {
 817                 return;
 818             }
 819
 820                         $(document).on('click','.attachment.more',function () {
 821                                 var m = $(this);
 822                                 m.addClass(SN.C.S.Processing);
 823                                 $.get(m.attr('href'), {ajax: 1}, function (data) {
 824                                         m.parent('.e-content').html($(data).find('#attachment_view .e-content').html());
 825                                 });
 826
 827                                 return false;
 828                         });
 829
 830         },
 831
 832         /**
 833          * Setup function -- DOES NOT trigger actions immediately.
 834          *
 835          * Sets up event handlers for the file-attachment widget in the
 836          * new notice form. When a file is selected, a box will be added
 837          * below the text input showing the filename and, if supported
 838          * by the browser, a thumbnail preview.
 839          *
 840          * This preview box will also allow removing the attachment
 841          * prior to posting.
 842          *
 843          * @param {jQuery} form
 844          */
 845         NoticeDataAttach: function (form) {
 846             var i;
 847             var NDA = form.find('input[type=file]');
 848             NDA.change(function (event) {
 849                 form.find('.attach-status').remove();
 850
 851                 var filename = $(this).val();
 852                 if (!filename) {
 853                     // No file -- we've been tricked!
 854                     return false;
 855                 }
 856
 857                 var attachStatus = $('<div class="attach-status ' + SN.C.S.Success + '"><code></code> <button class="close">&#215;</button></div>');
 858                 attachStatus.find('code').text(filename);
 859                 attachStatus.find('button').click(function () {
 860                     attachStatus.remove();
 861                     NDA.val('');
 862
 863                     return false;
 864                 });
 865                 form.append(attachStatus);
 866
 867                 if (typeof this.files === "object") {
 868                     // Some newer browsers will let us fetch the files for preview.
 869                     for (i = 0; i < this.files.length; i++) {
 870                         SN.U.PreviewAttach(form, this.files[i]);
 871                     }
 872                 }
 873             });
 874         },
 875
 876         /**
 877          * Get PHP's MAX_FILE_SIZE setting for this form;
 878          * used to apply client-side file size limit checks.
 879          *
 880          * @param {jQuery} form
 881          * @return int max size in bytes; 0 or negative means no limit
 882          */
 883         maxFileSize: function (form) {
 884             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 885             if (max) {
 886                 return parseInt(max);
 887             }
 888             return 0;
 889         },
 890
 891         /**
 892          * For browsers with FileAPI support: make a thumbnail if possible,
 893          * and append it into the attachment display widget.
 894          *
 895          * Known good:
 896          * - Firefox 3.6.6, 4.0b7
 897          * - Chrome 8.0.552.210
 898          *
 899          * Known ok metadata, can't get contents:
 900          * - Safari 5.0.2
 901          *
 902          * Known fail:
 903          * - Opera 10.63, 11 beta (no input.files interface)
 904          *
 905          * @param {jQuery} form
 906          * @param {File} file
 907          *
 908          * @todo use configured thumbnail size
 909          * @todo detect pixel size?
 910          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 911          */
 912         PreviewAttach: function (form, file) {
 913             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 914             var preview = true;
 915
 916             var blobAsDataURL;
 917             if (window.createObjectURL !== undefined) {
 918                 /**
 919                  * createObjectURL lets us reference the file directly from an <img>
 920                  * This produces a compact URL with an opaque reference to the file,
 921                  * which we can reference immediately.
 922                  *
 923                  * - Firefox 3.6.6: no
 924                  * - Firefox 4.0b7: no
 925                  * - Safari 5.0.2: no
 926                  * - Chrome 8.0.552.210: works!
 927                  */
 928                 blobAsDataURL = function (blob, callback) {
 929                     callback(window.createObjectURL(blob));
 930                 };
 931             } else if (window.FileReader !== undefined) {
 932                 /**
 933                  * FileAPI's FileReader can build a data URL from a blob's contents,
 934                  * but it must read the file and build it asynchronously. This means
 935                  * we'll be passing a giant data URL around, which may be inefficient.
 936                  *
 937                  * - Firefox 3.6.6: works!
 938                  * - Firefox 4.0b7: works!
 939                  * - Safari 5.0.2: no
 940                  * - Chrome 8.0.552.210: works!
 941                  */
 942                 blobAsDataURL = function (blob, callback) {
 943                     var reader = new FileReader();
 944                     reader.onload = function (event) {
 945                         callback(reader.result);
 946                     };
 947                     reader.readAsDataURL(blob);
 948                 };
 949             } else {
 950                 preview = false;
 951             }
 952
 953             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 954             if ($.inArray(file.type, imageTypes) == -1) {
 955                 // We probably don't know how to show the file.
 956                 preview = false;
 957             }
 958
 959             var maxSize = 8 * 1024 * 1024;
 960             if (file.size > maxSize) {
 961                 // Don't kill the browser trying to load some giant image.
 962                 preview = false;
 963             }
 964
 965             if (preview) {
 966                 blobAsDataURL(file, function (url) {
 967                     var img = $('<img>')
 968                         .attr('title', tooltip)
 969                         .attr('alt', tooltip)
 970                         .attr('src', url)
 971                         .attr('style', 'height: 120px');
 972                     form.find('.attach-status').append(img);
 973                 });
 974             } else {
 975                 var img = $('<div></div>').text(tooltip);
 976                 form.find('.attach-status').append(img);
 977             }
 978         },
 979
 980         /**
 981          * Setup function -- DOES NOT trigger actions immediately.
 982          *
 983          * Initializes state for the location-lookup features in the
 984          * new-notice form. Seems to set up some event handlers for
 985          * triggering lookups and using the new values.
 986          *
 987          * @param {jQuery} form
 988          *
 989          * @fixme tl;dr
 990          * @fixme there's not good visual state update here, so users have a
 991          *        hard time figuring out if it's working or fixing if it's wrong.
 992          *
 993          */
 994         NoticeLocationAttach: function (form) {
 995             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
 996             var NLat = form.find('[name=lat]');
 997             var NLon = form.find('[name=lon]');
 998             var NLNS = form.find('[name=location_ns]').val();
 999             var NLID = form.find('[name=location_id]').val();
1000             var NLN = ''; // @fixme
1001             var NDGe = form.find('[name=notice_data-geo]');
1002             var check = form.find('[name=notice_data-geo]');
1003             var label = form.find('label.notice_data-geo');
1004
1005             function removeNoticeDataGeo(error) {
1006                 label
1007                     .attr('title', $.trim(label.text()))
1008                     .removeClass('checked');
1009
1010                 form.find('[name=lat]').val('');
1011                 form.find('[name=lon]').val('');
1012                 form.find('[name=location_ns]').val('');
1013                 form.find('[name=location_id]').val('');
1014                 form.find('[name=notice_data-geo]').prop('checked', false);
1015
1016                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1017
1018                 if (error) {
1019                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1020                     form.find('.geo_status_wrapper .geo_status').text(error);
1021                 } else {
1022                     form.find('.geo_status_wrapper').remove();
1023                 }
1024             }
1025
1026             function getJSONgeocodeURL(geocodeURL, data) {
1027                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1028                 $.getJSON(geocodeURL, data, function (location) {
1029                     var lns, lid, NLN_text;
1030
1031                     if (location.location_ns !== undefined) {
1032                         form.find('[name=location_ns]').val(location.location_ns);
1033                         lns = location.location_ns;
1034                     }
1035
1036                     if (location.location_id !== undefined) {
1037                         form.find('[name=location_id]').val(location.location_id);
1038                         lid = location.location_id;
1039                     }
1040
1041                     if (location.name === undefined) {
1042                         NLN_text = data.lat + ';' + data.lon;
1043                     } else {
1044                         NLN_text = location.name;
1045                     }
1046
1047                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1048                     label
1049                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1050
1051                     form.find('[name=lat]').val(data.lat);
1052                     form.find('[name=lon]').val(data.lon);
1053                     form.find('[name=location_ns]').val(lns);
1054                     form.find('[name=location_id]').val(lid);
1055                     form.find('[name=notice_data-geo]').prop('checked', true);
1056
1057                     var cookieValue = {
1058                         NLat: data.lat,
1059                         NLon: data.lon,
1060                         NLNS: lns,
1061                         NLID: lid,
1062                         NLN: NLN_text,
1063                         NLNU: location.url,
1064                         NDG: true
1065                     };
1066
1067                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1068                 });
1069             }
1070
1071             if (check.length > 0) {
1072                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1073                     check.prop('checked', false);
1074                 } else {
1075                     check.prop('checked', true);
1076                 }
1077
1078                 var NGW = form.find('.notice_data-geo_wrap');
1079                 var geocodeURL = NGW.attr('data-api');
1080
1081                 label.attr('title', label.text());
1082
1083                 check.change(function () {
1084                     if (check.prop('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === undefined) {
1085                         label
1086                             .attr('title', NoticeDataGeo_text.ShareDisable)
1087                             .addClass('checked');
1088
1089                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === undefined || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1090                             if (navigator.geolocation) {
1091                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1092                                 navigator.geolocation.getCurrentPosition(
1093                                     function (position) {
1094                                         form.find('[name=lat]').val(position.coords.latitude);
1095                                         form.find('[name=lon]').val(position.coords.longitude);
1096
1097                                         var data = {
1098                                             lat: position.coords.latitude,
1099                                             lon: position.coords.longitude,
1100                                             token: $('#token').val()
1101                                         };
1102
1103                                         getJSONgeocodeURL(geocodeURL, data);
1104                                     },
1105
1106                                     function (error) {
1107                                         switch(error.code) {
1108                                             case error.PERMISSION_DENIED:
1109                                                 removeNoticeDataGeo('Location permission denied.');
1110                                                 break;
1111                                             case error.TIMEOUT:
1112                                                 //$('#' + SN.C.S.NoticeDataGeo).prop('checked', false);
1113                                                 removeNoticeDataGeo('Location lookup timeout.');
1114                                                 break;
1115                                         }
1116                                     },
1117
1118                                     {
1119                                         timeout: 10000
1120                                     }
1121                                 );
1122                             } else {
1123                                 if (NLat.length > 0 && NLon.length > 0) {
1124                                     var data = {
1125                                         lat: NLat,
1126                                         lon: NLon,
1127                                         token: $('#token').val()
1128                                     };
1129
1130                                     getJSONgeocodeURL(geocodeURL, data);
1131                                 } else {
1132                                     removeNoticeDataGeo();
1133                                     check.remove();
1134                                     label.remove();
1135                                 }
1136                             }
1137                         } else {
1138                             try {
1139                                 var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1140
1141                                 form.find('[name=lat]').val(cookieValue.NLat);
1142                                 form.find('[name=lon]').val(cookieValue.NLon);
1143                                 form.find('[name=location_ns]').val(cookieValue.NLNS);
1144                                 form.find('[name=location_id]').val(cookieValue.NLID);
1145                                 form.find('[name=notice_data-geo]').prop('checked', cookieValue.NDG);
1146
1147                                SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1148                                 label
1149                                     .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1150                                     .addClass('checked');
1151                             } catch (e) {
1152                                 console.log('Parsing error:', e);
1153                             }
1154                         }
1155                     } else {
1156                         removeNoticeDataGeo();
1157                     }
1158                 }).change();
1159             }
1160         },
1161
1162         /**
1163          * Create or update a geolocation status widget in this notice posting form.
1164          *
1165          * @param {jQuery} form
1166          * @param {String} status
1167          * @param {String} lat (optional)
1168          * @param {String} lon (optional)
1169          * @param {String} url (optional)
1170          */
1171         NoticeGeoStatus: function (form, status, lat, lon, url)
1172         {
1173             var wrapper = form.find('.geo_status_wrapper');
1174             if (wrapper.length == 0) {
1175                 wrapper = $('<div class="' + SN.C.S.Success + ' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1176                 wrapper.find('button.close').click(function () {
1177                     form.find('[name=notice_data-geo]').prop('checked', false).change();
1178                     return false;
1179                 });
1180                 form.append(wrapper);
1181             }
1182             var label;
1183             if (url) {
1184                 label = $('<a></a>').attr('href', url);
1185             } else {
1186                 label = $('<span></span>');
1187             }
1188             label.text(status);
1189             if (lat || lon) {
1190                 var latlon = lat + ';' + lon;
1191                 label.attr('title', latlon);
1192                 if (!status) {
1193                     label.text(latlon)
1194                 }
1195             }
1196             wrapper.find('.geo_status').empty().append(label);
1197         },
1198
1199         /**
1200          * Setup function -- DOES NOT trigger actions immediately.
1201          *
1202          * Initializes event handlers for the "Send direct message" link on
1203          * profile pages, setting it up to display a dialog box when clicked.
1204          *
1205          * Unlike the repeat confirmation form, this appears to fetch
1206          * the form _from the original link target_, so the form itself
1207          * doesn't need to be in the current document.
1208          *
1209          * @fixme breaks ability to open link in new window?
1210          */
1211         NewDirectMessage: function () {
1212             NDM = $('.entity_send-a-message a');
1213             NDM.attr({'href': NDM.attr('href') + '&ajax=1'});
1214             NDM.on('click', function () {
1215                 var NDMF = $('.entity_send-a-message form');
1216                 if (NDMF.length === 0) {
1217                     $(this).addClass(SN.C.S.Processing);
1218                     $.get(NDM.attr('href'), null, function (data) {
1219                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1220                         NDMF = $('.entity_send-a-message .form_notice');
1221                         SN.U.FormNoticeXHR(NDMF);
1222                         SN.U.FormNoticeEnhancements(NDMF);
1223                         NDMF.append('<button class="close">&#215;</button>');
1224                         $('.entity_send-a-message button').click(function () {
1225                             NDMF.hide();
1226                             return false;
1227                         });
1228                         NDM.removeClass(SN.C.S.Processing);
1229                     });
1230                 } else {
1231                     NDMF.show();
1232                     $('.entity_send-a-message textarea').focus();
1233                 }
1234                 return false;
1235             });
1236         },
1237
1238         /**
1239          * Return a date object with the current local time on the
1240          * given year, month, and day.
1241          *
1242          * @param {number} year: 4-digit year
1243          * @param {number} month: 0 == January
1244          * @param {number} day: 1 == 1
1245          * @return {Date}
1246          */
1247         GetFullYear: function (year, month, day) {
1248             var date = new Date();
1249             date.setFullYear(year, month, day);
1250
1251             return date;
1252         },
1253
1254         /**
1255          * Some sort of object interface for storing some structured
1256          * information in a cookie.
1257          *
1258          * Appears to be used to save the last-used login nickname?
1259          * That's something that browsers usually take care of for us
1260          * these days, do we really need to do it? Does anything else
1261          * use this interface?
1262          *
1263          * @fixme what is this?
1264          * @fixme should this use non-cookie local storage when available?
1265          */
1266         StatusNetInstance: {
1267             /**
1268              * @fixme what is this?
1269              */
1270             Set: function (value) {
1271                 var SNI = SN.U.StatusNetInstance.Get();
1272                 if (SNI !== null) {
1273                     value = $.extend(SNI, value);
1274                 }
1275
1276                 $.cookie(
1277                     SN.C.S.StatusNetInstance,
1278                     JSON.stringify(value),
1279                     {
1280                         path: '/',
1281                         expires: SN.U.GetFullYear(2029, 0, 1)
1282                     });
1283             },
1284
1285             /**
1286              * @fixme what is this?
1287              */
1288             Get: function () {
1289                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1290                 if (cookieValue !== undefined) {
1291                     return JSON.parse(cookieValue);
1292                 }
1293                 return null;
1294             },
1295
1296             /**
1297              * @fixme what is this?
1298              */
1299             Delete: function () {
1300                 $.removeCookie(SN.C.S.StatusNetInstance);
1301             }
1302         },
1303
1304         /**
1305          * Check if the current page is a timeline where the current user's
1306          * posts should be displayed immediately on success.
1307          *
1308          * @fixme this should be done in a saner way, with machine-readable
1309          * info about what page we're looking at.
1310          *
1311          * @param {DOMElement} notice: HTML chunk with formatted notice
1312          * @return boolean
1313          */
1314         belongsOnTimeline: function (notice) {
1315             var action = $("body").attr('id');
1316             if (action == 'public') {
1317                 return true;
1318             }
1319
1320             var profileLink = $('#nav_profile a').attr('href');
1321             if (profileLink) {
1322                 var authorUrl = $(notice).find('.h-card.p-author').attr('href');
1323                 if (authorUrl == profileLink) {
1324                     if (action == 'all' || action == 'showstream') {
1325                         // Posts always show on your own friends and profile streams.
1326                         return true;
1327                     }
1328                 }
1329             }
1330
1331             // @fixme tag, group, reply timelines should be feasible as well.
1332             // Mismatch between id-based and name-based user/group links currently complicates
1333             // the lookup, since all our inline mentions contain the absolute links but the
1334             // UI links currently on the page use malleable names.
1335
1336             return false;
1337         },
1338
1339         /**
1340          * Switch to another active input sub-form.
1341          * This will hide the current form (if any), show the new one, and
1342          * update the input type tab selection state.
1343          *
1344          * @param {String} tag
1345          */
1346         switchInputFormTab: function (tag, setFocus) {
1347             if (typeof setFocus === 'undefined') { setFocus = true; }
1348             // The one that's current isn't current anymore
1349             $('.input_form_nav_tab.current').removeClass('current');
1350             if (tag != null) {
1351                 $('#input_form_nav_' + tag).addClass('current');
1352             }
1353
1354             // Don't remove 'current' if we also have the "nonav" class.
1355             // An example would be the message input form. removing
1356             // 'current' will cause the form to vanish from the page.
1357             var nonav = $('.input_form.current.nonav');
1358             if (nonav.length > 0) {
1359                 return;
1360             }
1361
1362             $('.input_form.current').removeClass('current');
1363             if (tag == null) {
1364                 // we're done here, no new inputform to focus on
1365                 return false;
1366             }
1367
1368             var noticeForm = $('#input_form_' + tag)
1369                     .addClass('current')
1370                     .find('.ajax-notice').each(function () {
1371                         var form = $(this);
1372                         SN.Init.NoticeFormSetup(form);
1373                     });
1374             if (setFocus) {
1375                 noticeForm.find('.notice_data-text').focus();
1376             }
1377
1378             return false;
1379         },
1380
1381         showMoreMenuItems: function (menuid) {
1382             $('#' + menuid + ' .more_link').remove();
1383             var selector = '#' + menuid + ' .extended_menu';
1384             var extended = $(selector);
1385             extended.removeClass('extended_menu');
1386             return void(0);
1387         },
1388
1389         /**
1390          * Show a response feedback bit under a form.
1391          *
1392          * @param {Element} form: the new-notice form usually
1393          * @param {String}  cls: CSS class name to use ('error' or 'success')
1394          * @param {String}  text
1395          * @access public
1396          */
1397         showFeedback: function (form, cls, text) {
1398             form.append(
1399                 $('<p class="form_response"></p>')
1400                     .addClass(cls)
1401                     .text(text)
1402             );
1403         },
1404
1405         addCallback: function (ename, callback) {
1406             // initialize to array if it's undefined
1407             if (typeof SN._callbacks[ename] === 'undefined') {
1408                 SN._callbacks[ename] = [];
1409             }
1410             SN._callbacks[ename].push(callback);
1411         },
1412
1413         runCallbacks: function (ename, data) {
1414             if (typeof SN._callbacks[ename] === 'undefined') {
1415                 return;
1416             }
1417             for (cbname in SN._callbacks[ename]) {
1418                 SN._callbacks[ename][cbname](data);
1419             }
1420         }
1421     },
1422
1423     E: {    /* Events */
1424         /* SN.E.ajaxNoticePosted, called when a notice has been posted successfully via an AJAX form
1425             @param  form        the originating form element
1426             @param  data        data from success() callback
1427             @param  textStatus  textStatus from success() callback
1428         */
1429         ajaxNoticePosted: function (form, data, textStatus) {
1430             var commandResult = $('#' + SN.C.S.CommandResult, data);
1431             if (commandResult.length > 0) {
1432                 SN.U.showFeedback(form, 'success', commandResult.text());
1433             } else {
1434                 // New notice post was successful. If on our timeline, show it!
1435                 var notice = document._importNode($('li', data)[0], true);
1436                 var notices = $('#notices_primary .notices:first');
1437                 var replyItem = form.closest('li.notice-reply');
1438
1439                 if (replyItem.length > 0) {
1440                     // If this is an inline reply, remove the form...
1441                     var list = form.closest('.threaded-replies');
1442
1443                     var id = $(notice).attr('id');
1444                     if ($('#' + id).length == 0) {
1445                         $(notice).insertBefore(replyItem);
1446                     } // else Realtime came through before us...
1447
1448                     replyItem.remove();
1449
1450                 } else if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
1451                     // Not a reply. If on our timeline, show it at the top!
1452
1453                     if ($('#' + notice.id).length === 0) {
1454                         var notice_irt_value = form.find('[name=inreplyto]').val();
1455                         var notice_irt = '#notices_primary #notice-' + notice_irt_value;
1456                         if ($('body')[0].id == 'conversation') {
1457                             if (notice_irt_value.length > 0 && $(notice_irt + ' .notices').length < 1) {
1458                                 $(notice_irt).append('<ul class="notices"></ul>');
1459                             }
1460                             $($(notice_irt + ' .notices')[0]).append(notice);
1461                         } else {
1462                             notices.prepend(notice);
1463                         }
1464                         $('#' + notice.id)
1465                             .css({display: 'none'})
1466                             .fadeIn(2500);
1467                         SN.U.NoticeWithAttachment($('#' + notice.id));
1468                         SN.U.switchInputFormTab(null);
1469                     }
1470                 } else {
1471                     // Not on a timeline that this belongs on?
1472                     // Just show a success message.
1473                     // @fixme inline
1474                     SN.U.showFeedback(form, 'success', $('title', data).text());
1475                 }
1476             }
1477             form.resetForm();
1478             form.find('[name=inreplyto]').val('');
1479             form.find('.attach-status').remove();
1480             SN.U.FormNoticeEnhancements(form);
1481
1482             SN.U.runCallbacks('notice_posted', {"notice": notice});
1483         },
1484     },
1485
1486
1487     Init: {
1488         /**
1489          * If user is logged in, run setup code for the new notice form:
1490          *
1491          *  - char counter
1492          *  - AJAX submission
1493          *  - location events
1494          *  - file upload events
1495          */
1496         NoticeForm: function () {
1497             if ($('body.user_in').length > 0) {
1498                 // SN.Init.NoticeFormSetup() will get run
1499                 // when forms get displayed for the first time...
1500
1501                 // Initialize the input form field
1502                 $('#input_form_nav .input_form_nav_tab.current').each(function () {
1503                     current_tab_id = $(this).attr('id').substring('input_form_nav_'.length);
1504                     SN.U.switchInputFormTab(current_tab_id, false);
1505                 });
1506
1507                 // Make inline reply forms self-close when clicking out.
1508                 $('body').on('click', function (e) {
1509                     var openReplies = $('li.notice-reply');
1510                     if (openReplies.length > 0) {
1511                         var target = $(e.target);
1512                         openReplies.each(function () {
1513                             // Did we click outside this one?
1514                             var replyItem = $(this);
1515                             if (replyItem.has(e.target).length == 0) {
1516                                 var textarea = replyItem.find('.notice_data-text:first');
1517                                 var cur = $.trim(textarea.val());
1518                                 // Only close if there's been no edit.
1519                                 if (cur == '' || cur == textarea.data('initialText')) {
1520                                     var parentNotice = replyItem.closest('li.notice');
1521                                     replyItem.hide();
1522                                     parentNotice.find('li.notice-reply-placeholder').show();
1523                                 }
1524                             }
1525                         });
1526                     }
1527                 });
1528             }
1529         },
1530
1531         /**
1532          * Encapsulate notice form setup for a single form.
1533          * Plugins can add extra setup by monkeypatching this
1534          * function.
1535          *
1536          * @param {jQuery} form
1537          */
1538         NoticeFormSetup: function (form) {
1539             if (form.data('NoticeFormSetup')) {
1540                 return false;
1541             }
1542             SN.U.NoticeLocationAttach(form);
1543             SN.U.FormNoticeUniqueID(form);
1544             SN.U.FormNoticeXHR(form);
1545             SN.U.FormNoticeEnhancements(form);
1546             SN.U.NoticeDataAttach(form);
1547             form.data('NoticeFormSetup', true);
1548         },
1549
1550         /**
1551          * Run setup code for notice timeline views items:
1552          *
1553          * - AJAX submission for fave/repeat/reply (if logged in)
1554          * - Attachment link extras ('more' links)
1555          */
1556         Notices: function () {
1557             if ($('body.user_in').length > 0) {
1558                 SN.U.NoticeRepeat();
1559                 SN.U.NoticeReply();
1560                 SN.U.NoticeInlineReplySetup();
1561                 SN.U.NoticeOptionsAjax();
1562             }
1563
1564             SN.U.NoticeAttachments();
1565         },
1566
1567         /**
1568          * Run setup code for user & group profile page header area if logged in:
1569          *
1570          * - AJAX submission for sub/unsub/join/leave/nudge
1571          * - AJAX form popup for direct-message
1572          */
1573         EntityActions: function () {
1574             if ($('body.user_in').length > 0) {
1575                 $(document).on('click', '.form_user_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1576                 $(document).on('click', '.form_user_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1577                 $(document).on('click', '.form_group_join', function () { SN.U.FormXHR($(this)); return false; });
1578                 $(document).on('click', '.form_group_leave', function () { SN.U.FormXHR($(this)); return false; });
1579                 $(document).on('click', '.form_user_nudge', function () { SN.U.FormXHR($(this)); return false; });
1580                 $(document).on('click', '.form_peopletag_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1581                 $(document).on('click', '.form_peopletag_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1582                 $(document).on('click', '.form_user_add_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1583                 $(document).on('click', '.form_user_remove_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1584
1585                 SN.U.NewDirectMessage();
1586             }
1587         },
1588
1589         ProfileSearch: function () {
1590             if ($('body.user_in').length > 0) {
1591                 $(document).on('click', '.form_peopletag_edit_user_search input.submit', function () {
1592                     SN.U.FormProfileSearchXHR($(this).parents('form')); return false;
1593                 });
1594             }
1595         },
1596
1597         /**
1598          * Run setup code for login form:
1599          *
1600          * - loads saved last-used-nickname from cookie
1601          * - sets event handler to save nickname to cookie on submit
1602          *
1603          * @fixme is this necessary? Browsers do their own form saving these days.
1604          */
1605         Login: function () {
1606             if (SN.U.StatusNetInstance.Get() !== null) {
1607                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1608                 if (nickname !== null) {
1609                     $('#form_login #nickname').val(nickname);
1610                 }
1611             }
1612
1613             $('#form_login').on('submit', function () {
1614                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1615                 return true;
1616             });
1617         },
1618
1619         /**
1620          * Run setup for the ajax people tags editor
1621          *
1622          * - show edit button
1623          * - set event handle for click on edit button
1624          *   - loads people tag autocompletion data if not already present
1625          *     or if it is stale.
1626          *
1627          */
1628         PeopleTags: function () {
1629             $('.user_profile_tags .editable').append($('<button class="peopletags_edit_button"/>'));
1630
1631             $(document).on('click', '.peopletags_edit_button', function () {
1632                 var form = $(this).parents('dd').eq(0).find('form');
1633                 // We can buy time from the above animation
1634
1635                 $.ajax({
1636                     url: _peopletagAC,
1637                     dataType: 'json',
1638                     data: {token: $('#token').val()},
1639                     ifModified: true,
1640                     success: function (data) {
1641                         // item.label is used to match
1642                         for (i=0; i < data.length; i++) {
1643                             data[i].label = data[i].tag;
1644                         }
1645
1646                         SN.C.PtagACData = data;
1647                     }
1648                 });
1649
1650                 $(this).parents('ul').eq(0).fadeOut(200, function () {form.fadeIn(200).find('input#tags')});
1651             });
1652
1653             $(document).on('click', '.user_profile_tags form .submit', function () {
1654                 SN.U.FormPeopletagsXHR($(this).parents('form')); return false;
1655             });
1656         },
1657
1658         /**
1659          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1660          */
1661         AjaxForms: function () {
1662             $(document).on('submit', 'form.ajax', function () {
1663                 SN.U.FormXHR($(this));
1664                 return false;
1665             });
1666             $(document).on('click', 'form.ajax input[type=submit]', function () {
1667                 // Some forms rely on knowing which submit button was clicked.
1668                 // Save a hidden input field which'll be picked up during AJAX
1669                 // submit...
1670                 var button = $(this);
1671                 var form = button.closest('form');
1672                 form.find('.hidden-submit-button').remove();
1673                 $('<input class="hidden-submit-button" type="hidden" />')
1674                     .attr('name', button.attr('name'))
1675                     .val(button.val())
1676                     .appendTo(form);
1677             });
1678         },
1679
1680         /**
1681          * Add logic to any file upload forms to handle file size limits,
1682          * on browsers that support basic FileAPI.
1683          */
1684         UploadForms: function () {
1685             $('input[type=file]').change(function (event) {
1686                 if (typeof this.files === "object" && this.files.length > 0) {
1687                     var size = 0;
1688                     for (var i = 0; i < this.files.length; i++) {
1689                         size += this.files[i].size;
1690                     }
1691
1692                     var max = SN.U.maxFileSize($(this.form));
1693                     if (max > 0 && size > max) {
1694                         var msg = 'File too large: maximum upload size is %d bytes.';
1695                         alert(msg.replace('%d', max));
1696
1697                         // Clear the files.
1698                         $(this).val('');
1699                         event.preventDefault();
1700                         return false;
1701                     }
1702                 }
1703             });
1704         },
1705
1706         CheckBoxes: function () {
1707             $("span[class='checkbox-wrapper']").addClass("unchecked");
1708             $(".checkbox-wrapper").click(function () {
1709                 if ($(this).children("input").prop("checked")) {
1710                     // uncheck
1711                     $(this).children("input").prop("checked", false);
1712                     $(this).removeClass("checked");
1713                     $(this).addClass("unchecked");
1714                     $(this).children("label").text("Private?");
1715                 } else {
1716                     // check
1717                     $(this).children("input").prop("checked", true);
1718                     $(this).removeClass("unchecked");
1719                     $(this).addClass("checked");
1720                     $(this).children("label").text("Private");
1721                 }
1722             });
1723         }
1724     }
1725 };
1726
1727 /**
1728  * Run initialization functions on DOM-ready.
1729  *
1730  * Note that if we're waiting on other scripts to load, this won't happen
1731  * until that's done. To load scripts asynchronously without delaying setup,
1732  * don't start them loading until after DOM-ready time!
1733  */
1734 $(function () {
1735     SN.Init.AjaxForms();
1736     SN.Init.UploadForms();
1737     SN.Init.CheckBoxes();
1738     if ($('.' + SN.C.S.FormNotice).length > 0) {
1739         SN.Init.NoticeForm();
1740     }
1741     if ($('#content .notices').length > 0) {
1742         SN.Init.Notices();
1743     }
1744     if ($('#content .entity_actions').length > 0) {
1745         SN.Init.EntityActions();
1746     }
1747     if ($('#form_login').length > 0) {
1748         SN.Init.Login();
1749     }
1750     if ($('#profile_search_results').length > 0) {
1751         SN.Init.ProfileSearch();
1752     }
1753     if ($('.user_profile_tags .editable').length > 0) {
1754         SN.Init.PeopleTags();
1755     }
1756 });
1757