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         }
  57     },
  58
  59     V: {    // Variables
  60     },
  61
  62     /**
  63      * list of callbacks, categorized into _callbacks['event_name'] = [ callback_function_1, callback_function_2 ]
  64      *
  65      * @access private
  66      */
  67     _callbacks: {},
  68
  69     /**
  70      * Map of localized message strings exported to script from the PHP
  71      * side via Action::getScriptMessages().
  72      *
  73      * Retrieve them via SN.msg(); this array is an implementation detail.
  74      *
  75      * @access private
  76      */
  77     messages: {},
  78
  79     /**
  80      * Grabs a localized string that's been previously exported to us
  81      * from server-side code via Action::getScriptMessages().
  82      *
  83      * @example alert(SN.msg('coolplugin-failed'));
  84      *
  85      * @param {String} key: string key name to pull from message index
  86      * @return matching localized message string
  87      */
  88     msg: function (key) {
  89         if (SN.messages[key] === undefined) {
  90             return '[' + key + ']';
  91         }
  92         return SN.messages[key];
  93     },
  94
  95     U: { // Utils
  96         /**
  97          * Setup function -- DOES NOT trigger actions immediately.
  98          *
  99          * Sets up event handlers on the new notice form.
 100          *
 101          * @param {jQuery} form: jQuery object whose first matching element is the form
 102          * @access private
 103          */
 104         FormNoticeEnhancements: function (form) {
 105             if ($.data(form[0], 'ElementData') === undefined) {
 106                 var MaxLength = form.find('.count').text();
 107                 if (MaxLength === undefined) {
 108                     MaxLength = SN.C.I.MaxLength;
 109                 }
 110                 $.data(form[0], 'ElementData', {MaxLength: MaxLength});
 111
 112                 SN.U.Counter(form);
 113
 114                 var NDT = form.find('.notice_data-text:first');
 115
 116                 NDT.on('keyup', function (e) {
 117                     SN.U.Counter(form);
 118                 });
 119
 120                 var delayedUpdate = function (e) {
 121                     // Cut and paste events fire *before* the operation,
 122                     // so we need to trigger an update in a little bit.
 123                     // This would be so much easier if the 'change' event
 124                     // actually fired every time the value changed. :P
 125                     window.setTimeout(function () {
 126                         SN.U.Counter(form);
 127                     }, 50);
 128                 };
 129                 // Note there's still no event for mouse-triggered 'delete'.
 130                 NDT.on('cut', delayedUpdate)
 131                     .on('paste', delayedUpdate);
 132             } else {
 133                 form.find('.count').text($.data(form[0], 'ElementData').MaxLength);
 134             }
 135         },
 136
 137         /**
 138          * To be called from event handlers on the notice import form.
 139          * Triggers an update of the remaining-characters counter.
 140          *
 141          * Additional counter updates will be suppressed during the
 142          * next half-second to avoid flooding the layout engine with
 143          * updates, followed by another automatic check.
 144          *
 145          * The maximum length is pulled from data established by
 146          * FormNoticeEnhancements.
 147          *
 148          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 149          * @access private
 150          */
 151         Counter: function (form) {
 152             SN.C.I.FormNoticeCurrent = form;
 153
 154             var MaxLength = $.data(form[0], 'ElementData').MaxLength;
 155
 156             if (MaxLength <= 0) {
 157                 return;
 158             }
 159
 160             var remaining = MaxLength - SN.U.CharacterCount(form);
 161             var counter = form.find('.count');
 162
 163             if (remaining.toString() != counter.text()) {
 164                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 165                     if (counter.text() != String(remaining)) {
 166                         counter.text(remaining);
 167                     }
 168                     if (remaining < 0) {
 169                         form.addClass(SN.C.S.Warning);
 170                     } else {
 171                         form.removeClass(SN.C.S.Warning);
 172                     }
 173                     // Skip updates for the next 500ms.
 174                     // On slower hardware, updating on every keypress is unpleasant.
 175                     if (!SN.C.I.CounterBlackout) {
 176                         SN.C.I.CounterBlackout = true;
 177                         SN.C.I.FormNoticeCurrent = form;
 178                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 179                     }
 180                 }
 181             }
 182         },
 183
 184         /**
 185          * Pull the count of characters in the current edit field.
 186          * Plugins replacing the edit control may need to override this.
 187          *
 188          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 189          * @return number of chars
 190          */
 191         CharacterCount: function (form) {
 192             return form.find('.notice_data-text:first').val().length;
 193         },
 194
 195         /**
 196          * Called internally after the counter update blackout period expires;
 197          * runs another update to make sure we didn't miss anything.
 198          *
 199          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 200          * @access private
 201          */
 202         ClearCounterBlackout: function (form) {
 203             // Allow keyup events to poke the counter again
 204             SN.C.I.CounterBlackout = false;
 205             // Check if the string changed since we last looked
 206             SN.U.Counter(form);
 207         },
 208
 209         /**
 210          * Helper function to rewrite default HTTP form action URLs to HTTPS
 211          * so we can actually fetch them when on an SSL page in ssl=sometimes
 212          * mode.
 213          *
 214          * It would be better to output URLs that didn't hardcode protocol
 215          * and hostname in the first place...
 216          *
 217          * @param {String} url
 218          * @return string
 219          */
 220         RewriteAjaxAction: function (url) {
 221             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 222             if (document.location.protocol === 'https:' && url.substr(0, 5) === 'http:') {
 223                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 224             }
 225             return url;
 226         },
 227
 228         FormNoticeUniqueID: function (form) {
 229             var oldId = form.attr('id');
 230             var newId = 'form_notice_' + Math.floor(Math.random()*999999999);
 231             var attrs = ['name', 'for', 'id'];
 232             for (var key in attrs) {
 233                 if (form.attr(attrs[key]) === undefined) {
 234                     continue;
 235                 }
 236                 form.attr(attrs[key], form.attr(attrs[key]).replace(oldId, newId));
 237             }
 238             for (var key in attrs) {
 239                 form.find("[" + attrs[key] + "*='" + oldId + "']").each(function () {
 240                         if ($(this).attr(attrs[key]) === undefined) {
 241                             return; // since we're inside the each(function () { ... });
 242                         }
 243                         var newAttr = $(this).attr(attrs[key]).replace(oldId, newId);
 244                         $(this).attr(attrs[key], newAttr);
 245                     });
 246             }
 247         },
 248
 249         /**
 250          * Grabs form data and submits it asynchronously, with 'ajax=1'
 251          * parameter added to the rest.
 252          *
 253          * If a successful response includes another form, that form
 254          * will be extracted and copied in, replacing the original form.
 255          * If there's no form, the first paragraph will be used.
 256          *
 257          * This will automatically be applied on the 'submit' event for
 258          * any form with the 'ajax' class.
 259          *
 260          * @fixme can sometimes explode confusingly if returnd data is bogus
 261          * @fixme error handling is pretty vague
 262          * @fixme can't submit file uploads
 263          *
 264          * @param {jQuery} form: jQuery object whose first element is a form
 265          * @param function onSuccess: something extra to do on success
 266          *
 267          * @access public
 268          */
 269         FormXHR: function (form, onSuccess) {
 270             $.ajax({
 271                 type: 'POST',
 272                 dataType: 'xml',
 273                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 274                 data: form.serialize() + '&ajax=1',
 275                 beforeSend: function (xhr) {
 276                     form
 277                         .addClass(SN.C.S.Processing)
 278                         .find('.submit')
 279                             .addClass(SN.C.S.Disabled)
 280                             .prop(SN.C.S.Disabled, true);
 281                 },
 282                 error: function (xhr, textStatus, errorThrown) {
 283                     // If the server end reported an error from StatusNet,
 284                     // find it -- otherwise we'll see what was reported
 285                     // from the browser.
 286                     var errorReported = null;
 287                     if (xhr.responseXML) {
 288                         errorReported = $('#error', xhr.responseXML).text();
 289                     }
 290                     window.alert(errorReported || errorThrown || textStatus);
 291
 292                     // Restore the form to original state.
 293                     // Hopefully. :D
 294                     form
 295                         .removeClass(SN.C.S.Processing)
 296                         .find('.submit')
 297                             .removeClass(SN.C.S.Disabled)
 298                             .prop(SN.C.S.Disabled, false);
 299                 },
 300                 success: function (data, textStatus) {
 301                     if ($('form', data)[0] !== undefined) {
 302                         var form_new = document._importNode($('form', data)[0], true);
 303                         form.replaceWith(form_new);
 304                         if (onSuccess) {
 305                             onSuccess();
 306                         }
 307                     } else if ($('p', data)[0] !== undefined) {
 308                         form.replaceWith(document._importNode($('p', data)[0], true));
 309                         if (onSuccess) {
 310                             onSuccess();
 311                         }
 312                     } else {
 313                         window.alert('Unknown error.');
 314                     }
 315                 }
 316             });
 317         },
 318
 319         /**
 320          * Setup function -- DOES NOT trigger actions immediately.
 321          *
 322          * Sets up event handlers for special-cased async submission of the
 323          * notice-posting form, including some pre-post validation.
 324          *
 325          * Unlike FormXHR() this does NOT submit the form immediately!
 326          * It sets up event handlers so that any method of submitting the
 327          * form (click on submit button, enter, submit() etc) will trigger
 328          * it properly.
 329          *
 330          * Also unlike FormXHR(), this system will use a hidden iframe
 331          * automatically to handle file uploads via <input type="file">
 332          * controls.
 333          *
 334          * @fixme tl;dr
 335          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 336          * @fixme error handling is unreliable
 337          * @fixme cookieValue is a global variable, but probably shouldn't be
 338          * @fixme saving the location cache cookies should be split out
 339          * @fixme some error messages are hardcoded english: needs i18n
 340          *
 341          * @param {jQuery} form: jQuery object whose first element is a form
 342          *
 343          * @access public
 344          */
 345         FormNoticeXHR: function (form) {
 346             SN.C.I.NoticeDataGeo = {};
 347             form.append('<input type="hidden" name="ajax" value="1"/>');
 348
 349             // Make sure we don't have a mixed HTTP/HTTPS submission...
 350             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 351
 352             /**
 353              * Hide the previous response feedback, if any.
 354              */
 355             var removeFeedback = function () {
 356                 form.find('.form_response').remove();
 357             };
 358
 359             form.ajaxForm({
 360                 dataType: 'xml',
 361                 timeout: '60000',
 362                 beforeSend: function (formData) {
 363                     if (form.find('.notice_data-text:first').val() == '') {
 364                         form.addClass(SN.C.S.Warning);
 365                         return false;
 366                     }
 367                     form
 368                         .addClass(SN.C.S.Processing)
 369                         .find('.submit')
 370                             .addClass(SN.C.S.Disabled)
 371                             .prop(SN.C.S.Disabled, true);
 372
 373                     SN.U.normalizeGeoData(form);
 374
 375                     return true;
 376                 },
 377                 error: function (xhr, textStatus, errorThrown) {
 378                     form
 379                         .removeClass(SN.C.S.Processing)
 380                         .find('.submit')
 381                             .removeClass(SN.C.S.Disabled)
 382                             .prop(SN.C.S.Disabled, false);
 383                     removeFeedback();
 384                     if (textStatus == 'timeout') {
 385                         // @fixme i18n
 386                         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.');
 387                     } else {
 388                         var response = SN.U.GetResponseXML(xhr);
 389                         if ($('.' + SN.C.S.Error, response).length > 0) {
 390                             form.append(document._importNode($('.' + SN.C.S.Error, response)[0], true));
 391                         } else {
 392                             if (parseInt(xhr.status) === 0 || $.inArray(parseInt(xhr.status), SN.C.I.HTTP20x30x) >= 0) {
 393                                 form
 394                                     .resetForm()
 395                                     .find('.attach-status').remove();
 396                                 SN.U.FormNoticeEnhancements(form);
 397                             } else {
 398                                 // @fixme i18n
 399                                 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.');
 400                             }
 401                         }
 402                     }
 403                 },
 404                 success: function (data, textStatus) {
 405                     removeFeedback();
 406                     var errorResult = $('#' + SN.C.S.Error, data);
 407                     if (errorResult.length > 0) {
 408                         SN.U.showFeedback(form, 'error', errorResult.text());
 409                     } else {
 410                         SN.E.ajaxNoticePosted(form, data, textStatus);
 411                     }
 412                 },
 413                 complete: function (xhr, textStatus) {
 414                     form
 415                         .removeClass(SN.C.S.Processing)
 416                         .find('.submit')
 417                             .prop(SN.C.S.Disabled, false)
 418                             .removeClass(SN.C.S.Disabled);
 419
 420                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 421                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 422                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 423                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 424                     form.find('[name=notice_data-geo]').prop('checked', SN.C.I.NoticeDataGeo.NDG);
 425                 }
 426             });
 427         },
 428
 429         FormProfileSearchXHR: function (form) {
 430             $.ajax({
 431                 type: 'POST',
 432                 dataType: 'xml',
 433                 url: form.attr('action'),
 434                 data: form.serialize() + '&ajax=1',
 435                 beforeSend: function (xhr) {
 436                     form
 437                         .addClass(SN.C.S.Processing)
 438                         .find('.submit')
 439                             .addClass(SN.C.S.Disabled)
 440                             .prop(SN.C.S.Disabled, true);
 441                 },
 442                 error: function (xhr, textStatus, errorThrown) {
 443                     window.alert(errorThrown || textStatus);
 444                 },
 445                 success: function (data, textStatus) {
 446                     var results_placeholder = $('#profile_search_results');
 447                     if ($('ul', data)[0] !== undefined) {
 448                         var list = document._importNode($('ul', data)[0], true);
 449                         results_placeholder.replaceWith(list);
 450                     } else {
 451                         var _error = $('<li/>').append(document._importNode($('p', data)[0], true));
 452                         results_placeholder.html(_error);
 453                     }
 454                     form
 455                         .removeClass(SN.C.S.Processing)
 456                         .find('.submit')
 457                             .removeClass(SN.C.S.Disabled)
 458                             .prop(SN.C.S.Disabled, false);
 459                 }
 460             });
 461         },
 462
 463         FormPeopletagsXHR: function (form) {
 464             $.ajax({
 465                 type: 'POST',
 466                 dataType: 'xml',
 467                 url: form.attr('action'),
 468                 data: form.serialize() + '&ajax=1',
 469                 beforeSend: function (xhr) {
 470                     form.find('.submit')
 471                             .addClass(SN.C.S.Processing)
 472                             .addClass(SN.C.S.Disabled)
 473                             .prop(SN.C.S.Disabled, true);
 474                 },
 475                 error: function (xhr, textStatus, errorThrown) {
 476                     window.alert(errorThrown || textStatus);
 477                 },
 478                 success: function (data, textStatus) {
 479                     var results_placeholder = form.parents('.entity_tags');
 480                     if ($('.entity_tags', data)[0] !== undefined) {
 481                         var tags = document._importNode($('.entity_tags', data)[0], true);
 482                         $(tags).find('.editable').append($('<button class="peopletags_edit_button"/>'));
 483                         results_placeholder.replaceWith(tags);
 484                     } else {
 485                         results_placeholder.find('p').remove();
 486                         results_placeholder.append(document._importNode($('p', data)[0], true));
 487                         form.removeClass(SN.C.S.Processing)
 488                             .find('.submit')
 489                                 .removeClass(SN.C.S.Disabled)
 490                                 .prop(SN.C.S.Disabled, false);
 491                     }
 492                 }
 493             });
 494         },
 495
 496         normalizeGeoData: function (form) {
 497             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 498             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 499             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 500             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 501             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked'); // @fixme (does this still need to be fixed somehow?)
 502
 503             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 504
 505             if (cookieValue !== undefined && cookieValue != 'disabled') {
 506                 cookieValue = JSON.parse(cookieValue);
 507                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 508                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 509                 if (cookieValue.NLNS) {
 510                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 511                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 512                 } else {
 513                     form.find('[name=location_ns]').val('');
 514                     form.find('[name=location_id]').val('');
 515                 }
 516             }
 517             if (cookieValue == 'disabled') {
 518                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', false).prop('checked');
 519             } else {
 520                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', true).prop('checked');
 521             }
 522
 523         },
 524
 525         /**
 526          * Fetch an XML DOM from an XHR's response data.
 527          *
 528          * Works around unavailable responseXML when document.domain
 529          * has been modified by Meteor or other tools, in some but not
 530          * all browsers.
 531          *
 532          * @param {XMLHTTPRequest} xhr
 533          * @return DOMDocument
 534          */
 535         GetResponseXML: function (xhr) {
 536             try {
 537                 return xhr.responseXML;
 538             } catch (e) {
 539                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 540             }
 541         },
 542
 543         /**
 544          * Setup function -- DOES NOT trigger actions immediately.
 545          *
 546          * Sets up event handlers on all visible notice's option <a> elements
 547          * with the "popup" class so they behave as expected with AJAX.
 548          *
 549          * (without javascript the link goes to a page that expects you to verify
 550          * the action through a form)
 551          *
 552          * @access private
 553          */
 554         NoticeOptionsAjax: function () {
 555             $(document).on('click', '.notice-options > a.popup', function (e) {
 556                 e.preventDefault();
 557                 var noticeEl = $(this).closest('.notice');
 558                 $.ajax({
 559                     url: $(this).attr('href'),
 560                     data: {ajax: 1},
 561                     success: function (data, textStatus, xhr) {
 562                         SN.U.NoticeOptionPopup(data, noticeEl);
 563                     },
 564                 });
 565                 return false;
 566             });
 567         },
 568
 569         NoticeOptionPopup: function (data, noticeEl) {
 570             title = $('head > title', data).text();
 571             body = $('body', data).html();
 572             dialog = $(body).dialog({
 573                     height: "auto",
 574                     width: "auto",
 575                     modal: true,
 576                     resizable: true,
 577                     title: title,
 578                 });
 579         },
 580
 581         /**
 582          * Setup function -- DOES NOT trigger actions immediately.
 583          *
 584          * Sets up event handlers on all visible notice's reply buttons to
 585          * tweak the new-notice form with needed variables and focus it
 586          * when pushed.
 587          *
 588          * (This replaces the default reply button behavior to submit
 589          * directly to a form which comes back with a specialized page
 590          * with the form data prefilled.)
 591          *
 592          * @access private
 593          */
 594         NoticeReply: function () {
 595             $(document).on('click', '#content .notice_reply', function (e) {
 596                 e.preventDefault();
 597                 var notice = $(this).closest('li.notice');
 598                 SN.U.NoticeInlineReplyTrigger(notice);
 599                 return false;
 600             });
 601         },
 602
 603         /**
 604          * Stub -- kept for compat with plugins for now.
 605          * @access private
 606          */
 607         NoticeReplyTo: function (notice) {
 608         },
 609
 610         /**
 611          * Open up a notice's inline reply box.
 612          *
 613          * @param {jQuery} notice: jQuery object containing one notice
 614          * @param {String} initialText
 615          */
 616         NoticeInlineReplyTrigger: function (notice, initialText) {
 617             // Find the notice we're replying to...
 618             var id = $($('.notice_id', notice)[0]).text();
 619             var replyForm;
 620             var parentNotice = notice;
 621             var stripForm = true; // strip a couple things out of reply forms that are inline
 622
 623             var list = notice.find('.threaded-replies');
 624             if (list.length == 0) {
 625                 list = notice.closest('.threaded-replies');
 626             }
 627             if (list.length == 0) {
 628                 list = $('<ul class="notices threaded-replies xoxo"></ul>');
 629                 notice.append(list);
 630                 list = notice.find('.threaded-replies');
 631             }
 632
 633             var nextStep = function () {
 634                 // Override...?
 635                 replyForm.find('input[name=inreplyto]').val(id);
 636                 if (stripForm) {
 637                     // Don't do this for old-school reply form, as they don't come back!
 638                     replyForm.find('#notice_to').prop('disabled', true).hide();
 639                     replyForm.find('#notice_private').prop('disabled', true).hide();
 640                     replyForm.find('label[for=notice_to]').hide();
 641                     replyForm.find('label[for=notice_private]').hide();
 642                 }
 643                 replyItem.show();
 644
 645                 // Set focus...
 646                 var text = replyForm.find('textarea');
 647                 if (text.length == 0) {
 648                     throw "No textarea";
 649                 }
 650                 var replyto = '';
 651                 if (initialText) {
 652                     replyto = initialText + ' ';
 653                 }
 654                 text.val(replyto + text.val().replace(new RegExp(replyto, 'i'), ''));
 655                 text.data('initialText', $.trim(initialText));
 656                 text.focus();
 657                 if (text[0].setSelectionRange) {
 658                     var len = text.val().length;
 659                     text[0].setSelectionRange(len, len);
 660                 }
 661             };
 662
 663             // Create the reply form entry
 664             var replyItem = $('li.notice-reply', list);
 665             if (replyItem.length == 0) {
 666                 replyItem = $('<li class="notice-reply"></li>');
 667             }
 668             replyForm = replyItem.children('form');
 669             if (replyForm.length == 0) {
 670                 // Let's try another trick to avoid fetching by URL
 671                 var noticeForm = $('#input_form_status > form');
 672                 if (noticeForm.length == 0) {
 673                     // No notice form found on the page, so let's just
 674                     // fetch a fresh copy of the notice form over AJAX.
 675                     $.ajax({
 676                         url: SN.V.urlNewNotice,
 677                         data: {ajax: 1, inreplyto: id},
 678                         success: function (data, textStatus, xhr) {
 679                             var formEl = document._importNode($('form', data)[0], true);
 680                             replyForm = $(formEl);
 681                             replyItem.append(replyForm);
 682                             list.append(replyItem);
 683
 684                             SN.Init.NoticeFormSetup(replyForm);
 685                             nextStep();
 686                         },
 687                     });
 688                     // We do everything relevant in 'success' above
 689                     return;
 690                 }
 691                 replyForm = noticeForm.clone();
 692                 SN.Init.NoticeFormSetup(replyForm);
 693                 replyItem.append(replyForm);
 694                 list.append(replyItem);
 695             }
 696             // replyForm is set, we're not fetching by URL...
 697             // Next setp is to configure in-reply-to etc.
 698             nextStep();
 699         },
 700
 701         /**
 702          * Setup function -- DOES NOT apply immediately.
 703          *
 704          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 705          */
 706         NoticeInlineReplySetup: function () {
 707             // Expand conversation links
 708             $(document).on('click', 'li.notice-reply-comments a', function () {
 709                     var url = $(this).attr('href');
 710                     var area = $(this).closest('.threaded-replies');
 711                     $.ajax({
 712                         url: url,
 713                         data: {ajax: 1},
 714                         success: function (data, textStatus, xhr) {
 715                             var replies = $('.threaded-replies', data);
 716                             if (replies.length) {
 717                                 area.replaceWith(document._importNode(replies[0], true));
 718                             }
 719                         },
 720                     });
 721                     return false;
 722                 });
 723         },
 724
 725         /**
 726          * Setup function -- DOES NOT trigger actions immediately.
 727          *
 728          * Sets up event handlers for repeat forms to toss up a confirmation
 729          * popout before submitting.
 730          *
 731          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 732          *
 733          */
 734         NoticeRepeat: function () {
 735             $('body').on('click', '.form_repeat', function (e) {
 736                 e.preventDefault();
 737
 738                 SN.U.NoticeRepeatConfirmation($(this));
 739                 return false;
 740             });
 741         },
 742
 743         /**
 744          * Shows a confirmation dialog box variant of the repeat button form.
 745          * This seems to use a technique where the repeat form contains
 746          * _both_ a standalone button _and_ text and buttons for a dialog.
 747          * The dialog will close after its copy of the form is submitted,
 748          * or if you click its 'close' button.
 749          *
 750          * The dialog is created by duplicating the original form and changing
 751          * its style; while clever, this is hard to generalize and probably
 752          * duplicates a lot of unnecessary HTML output.
 753          *
 754          * @fixme create confirmation dialogs through a generalized interface
 755          * that can be reused instead of hardcoded text and styles.
 756          *
 757          * @param {jQuery} form
 758          */
 759         NoticeRepeatConfirmation: function (form) {
 760             var submit_i = form.find('.submit');
 761
 762             var submit = submit_i.clone();
 763             submit
 764                 .addClass('submit_dialogbox')
 765                 .removeClass('submit');
 766             form.append(submit);
 767             submit.on('click', function () { SN.U.FormXHR(form); return false; });
 768
 769             submit_i.hide();
 770
 771             form
 772                 .addClass('dialogbox')
 773                 .append('<button class="close" title="' + SN.msg('popup_close_button') + '">&#215;</button>')
 774                 .closest('.notice-options')
 775                     .addClass('opaque');
 776
 777             form.find('button.close').click(function () {
 778                 $(this).remove();
 779
 780                 form
 781                     .removeClass('dialogbox')
 782                     .closest('.notice-options')
 783                         .removeClass('opaque');
 784
 785                 form.find('.submit_dialogbox').remove();
 786                 form.find('.submit').show();
 787
 788                 return false;
 789             });
 790         },
 791
 792         /**
 793          * Setup function -- DOES NOT trigger actions immediately.
 794          *
 795          * Goes through all notices currently displayed and sets up attachment
 796          * handling if needed.
 797          */
 798         NoticeAttachments: function () {
 799             $('.notice a.attachment').each(function () {
 800                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 801             });
 802         },
 803
 804         /**
 805          * Setup function -- DOES NOT trigger actions immediately.
 806          *
 807          * Sets up special attachment link handling if needed. Currently this
 808          * consists only of making the "more" button used for OStatus message
 809          * cropping turn into an auto-expansion button that loads the full
 810          * text from an attachment file.
 811          *
 812          * @param {jQuery} notice
 813          */
 814         NoticeWithAttachment: function (notice) {
 815             if (notice.find('.attachment').length === 0) {
 816                 return;
 817             }
 818
 819                         $(document).on('click','.attachment.more',function () {
 820                                 var m = $(this);
 821                                 m.addClass(SN.C.S.Processing);
 822                                 $.get(m.attr('href'), {ajax: 1}, function (data) {
 823                                         m.parent('.e-content').html($(data).find('#attachment_view .e-content').html());
 824                                 });
 825
 826                                 return false;
 827                         });
 828
 829         },
 830
 831         /**
 832          * Setup function -- DOES NOT trigger actions immediately.
 833          *
 834          * Sets up event handlers for the file-attachment widget in the
 835          * new notice form. When a file is selected, a box will be added
 836          * below the text input showing the filename and, if supported
 837          * by the browser, a thumbnail preview.
 838          *
 839          * This preview box will also allow removing the attachment
 840          * prior to posting.
 841          *
 842          * @param {jQuery} form
 843          */
 844         NoticeDataAttach: function (form) {
 845             var i;
 846             var NDA = form.find('input[type=file]');
 847             NDA.change(function (event) {
 848                 form.find('.attach-status').remove();
 849
 850                 var filename = $(this).val();
 851                 if (!filename) {
 852                     // No file -- we've been tricked!
 853                     return false;
 854                 }
 855
 856                 var attachStatus = $('<div class="attach-status ' + SN.C.S.Success + '"><code></code> <button class="close">&#215;</button></div>');
 857                 attachStatus.find('code').text(filename);
 858                 attachStatus.find('button').click(function () {
 859                     attachStatus.remove();
 860                     NDA.val('');
 861
 862                     return false;
 863                 });
 864                 form.append(attachStatus);
 865
 866                 if (typeof this.files === "object") {
 867                     // Some newer browsers will let us fetch the files for preview.
 868                     for (i = 0; i < this.files.length; i++) {
 869                         SN.U.PreviewAttach(form, this.files[i]);
 870                     }
 871                 }
 872             });
 873         },
 874
 875         /**
 876          * Get PHP's MAX_FILE_SIZE setting for this form;
 877          * used to apply client-side file size limit checks.
 878          *
 879          * @param {jQuery} form
 880          * @return int max size in bytes; 0 or negative means no limit
 881          */
 882         maxFileSize: function (form) {
 883             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 884             if (max) {
 885                 return parseInt(max);
 886             }
 887             return 0;
 888         },
 889
 890         /**
 891          * For browsers with FileAPI support: make a thumbnail if possible,
 892          * and append it into the attachment display widget.
 893          *
 894          * Known good:
 895          * - Firefox 3.6.6, 4.0b7
 896          * - Chrome 8.0.552.210
 897          *
 898          * Known ok metadata, can't get contents:
 899          * - Safari 5.0.2
 900          *
 901          * Known fail:
 902          * - Opera 10.63, 11 beta (no input.files interface)
 903          *
 904          * @param {jQuery} form
 905          * @param {File} file
 906          *
 907          * @todo use configured thumbnail size
 908          * @todo detect pixel size?
 909          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 910          */
 911         PreviewAttach: function (form, file) {
 912             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 913             var preview = true;
 914
 915             var blobAsDataURL;
 916             if (window.createObjectURL !== undefined) {
 917                 /**
 918                  * createObjectURL lets us reference the file directly from an <img>
 919                  * This produces a compact URL with an opaque reference to the file,
 920                  * which we can reference immediately.
 921                  *
 922                  * - Firefox 3.6.6: no
 923                  * - Firefox 4.0b7: no
 924                  * - Safari 5.0.2: no
 925                  * - Chrome 8.0.552.210: works!
 926                  */
 927                 blobAsDataURL = function (blob, callback) {
 928                     callback(window.createObjectURL(blob));
 929                 };
 930             } else if (window.FileReader !== undefined) {
 931                 /**
 932                  * FileAPI's FileReader can build a data URL from a blob's contents,
 933                  * but it must read the file and build it asynchronously. This means
 934                  * we'll be passing a giant data URL around, which may be inefficient.
 935                  *
 936                  * - Firefox 3.6.6: works!
 937                  * - Firefox 4.0b7: works!
 938                  * - Safari 5.0.2: no
 939                  * - Chrome 8.0.552.210: works!
 940                  */
 941                 blobAsDataURL = function (blob, callback) {
 942                     var reader = new FileReader();
 943                     reader.onload = function (event) {
 944                         callback(reader.result);
 945                     };
 946                     reader.readAsDataURL(blob);
 947                 };
 948             } else {
 949                 preview = false;
 950             }
 951
 952             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 953             if ($.inArray(file.type, imageTypes) == -1) {
 954                 // We probably don't know how to show the file.
 955                 preview = false;
 956             }
 957
 958             var maxSize = 8 * 1024 * 1024;
 959             if (file.size > maxSize) {
 960                 // Don't kill the browser trying to load some giant image.
 961                 preview = false;
 962             }
 963
 964             if (preview) {
 965                 blobAsDataURL(file, function (url) {
 966                     var img = $('<img>')
 967                         .attr('title', tooltip)
 968                         .attr('alt', tooltip)
 969                         .attr('src', url)
 970                         .attr('style', 'height: 120px');
 971                     form.find('.attach-status').append(img);
 972                 });
 973             } else {
 974                 var img = $('<div></div>').text(tooltip);
 975                 form.find('.attach-status').append(img);
 976             }
 977         },
 978
 979         /**
 980          * Setup function -- DOES NOT trigger actions immediately.
 981          *
 982          * Initializes state for the location-lookup features in the
 983          * new-notice form. Seems to set up some event handlers for
 984          * triggering lookups and using the new values.
 985          *
 986          * @param {jQuery} form
 987          *
 988          * @fixme tl;dr
 989          * @fixme there's not good visual state update here, so users have a
 990          *        hard time figuring out if it's working or fixing if it's wrong.
 991          *
 992          */
 993         NoticeLocationAttach: function (form) {
 994             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
 995             var NLat = form.find('[name=lat]');
 996             var NLon = form.find('[name=lon]');
 997             var NLNS = form.find('[name=location_ns]').val();
 998             var NLID = form.find('[name=location_id]').val();
 999             var NLN = ''; // @fixme
1000             var NDGe = form.find('[name=notice_data-geo]');
1001             var check = form.find('[name=notice_data-geo]');
1002             var label = form.find('label.notice_data-geo');
1003
1004             function removeNoticeDataGeo(error) {
1005                 label
1006                     .attr('title', $.trim(label.text()))
1007                     .removeClass('checked');
1008
1009                 form.find('[name=lat]').val('');
1010                 form.find('[name=lon]').val('');
1011                 form.find('[name=location_ns]').val('');
1012                 form.find('[name=location_id]').val('');
1013                 form.find('[name=notice_data-geo]').prop('checked', false);
1014
1015                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1016
1017                 if (error) {
1018                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1019                     form.find('.geo_status_wrapper .geo_status').text(error);
1020                 } else {
1021                     form.find('.geo_status_wrapper').remove();
1022                 }
1023             }
1024
1025             function getJSONgeocodeURL(geocodeURL, data) {
1026                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1027                 $.getJSON(geocodeURL, data, function (location) {
1028                     var lns, lid, NLN_text;
1029
1030                     if (location.location_ns !== undefined) {
1031                         form.find('[name=location_ns]').val(location.location_ns);
1032                         lns = location.location_ns;
1033                     }
1034
1035                     if (location.location_id !== undefined) {
1036                         form.find('[name=location_id]').val(location.location_id);
1037                         lid = location.location_id;
1038                     }
1039
1040                     if (location.name === undefined) {
1041                         NLN_text = data.lat + ';' + data.lon;
1042                     } else {
1043                         NLN_text = location.name;
1044                     }
1045
1046                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1047                     label
1048                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1049
1050                     form.find('[name=lat]').val(data.lat);
1051                     form.find('[name=lon]').val(data.lon);
1052                     form.find('[name=location_ns]').val(lns);
1053                     form.find('[name=location_id]').val(lid);
1054                     form.find('[name=notice_data-geo]').prop('checked', true);
1055
1056                     var cookieValue = {
1057                         NLat: data.lat,
1058                         NLon: data.lon,
1059                         NLNS: lns,
1060                         NLID: lid,
1061                         NLN: NLN_text,
1062                         NLNU: location.url,
1063                         NDG: true
1064                     };
1065
1066                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1067                 });
1068             }
1069
1070             if (check.length > 0) {
1071                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1072                     check.prop('checked', false);
1073                 } else {
1074                     check.prop('checked', true);
1075                 }
1076
1077                 var NGW = form.find('.notice_data-geo_wrap');
1078                 var geocodeURL = NGW.attr('data-api');
1079
1080                 label.attr('title', label.text());
1081
1082                 check.change(function () {
1083                     if (check.prop('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === undefined) {
1084                         label
1085                             .attr('title', NoticeDataGeo_text.ShareDisable)
1086                             .addClass('checked');
1087
1088                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === undefined || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1089                             if (navigator.geolocation) {
1090                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1091                                 navigator.geolocation.getCurrentPosition(
1092                                     function (position) {
1093                                         form.find('[name=lat]').val(position.coords.latitude);
1094                                         form.find('[name=lon]').val(position.coords.longitude);
1095
1096                                         var data = {
1097                                             lat: position.coords.latitude,
1098                                             lon: position.coords.longitude,
1099                                             token: $('#token').val()
1100                                         };
1101
1102                                         getJSONgeocodeURL(geocodeURL, data);
1103                                     },
1104
1105                                     function (error) {
1106                                         switch(error.code) {
1107                                             case error.PERMISSION_DENIED:
1108                                                 removeNoticeDataGeo('Location permission denied.');
1109                                                 break;
1110                                             case error.TIMEOUT:
1111                                                 //$('#' + SN.C.S.NoticeDataGeo).prop('checked', false);
1112                                                 removeNoticeDataGeo('Location lookup timeout.');
1113                                                 break;
1114                                         }
1115                                     },
1116
1117                                     {
1118                                         timeout: 10000
1119                                     }
1120                                 );
1121                             } else {
1122                                 if (NLat.length > 0 && NLon.length > 0) {
1123                                     var data = {
1124                                         lat: NLat,
1125                                         lon: NLon,
1126                                         token: $('#token').val()
1127                                     };
1128
1129                                     getJSONgeocodeURL(geocodeURL, data);
1130                                 } else {
1131                                     removeNoticeDataGeo();
1132                                     check.remove();
1133                                     label.remove();
1134                                 }
1135                             }
1136                         } else {
1137                             try {
1138                                 var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1139
1140                                 form.find('[name=lat]').val(cookieValue.NLat);
1141                                 form.find('[name=lon]').val(cookieValue.NLon);
1142                                 form.find('[name=location_ns]').val(cookieValue.NLNS);
1143                                 form.find('[name=location_id]').val(cookieValue.NLID);
1144                                 form.find('[name=notice_data-geo]').prop('checked', cookieValue.NDG);
1145
1146                                SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1147                                 label
1148                                     .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1149                                     .addClass('checked');
1150                             } catch (e) {
1151                                 console.log('Parsing error:', e);
1152                             }
1153                         }
1154                     } else {
1155                         removeNoticeDataGeo();
1156                     }
1157                 }).change();
1158             }
1159         },
1160
1161         /**
1162          * Create or update a geolocation status widget in this notice posting form.
1163          *
1164          * @param {jQuery} form
1165          * @param {String} status
1166          * @param {String} lat (optional)
1167          * @param {String} lon (optional)
1168          * @param {String} url (optional)
1169          */
1170         NoticeGeoStatus: function (form, status, lat, lon, url)
1171         {
1172             var wrapper = form.find('.geo_status_wrapper');
1173             if (wrapper.length == 0) {
1174                 wrapper = $('<div class="' + SN.C.S.Success + ' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1175                 wrapper.find('button.close').click(function () {
1176                     form.find('[name=notice_data-geo]').prop('checked', false).change();
1177                     return false;
1178                 });
1179                 form.append(wrapper);
1180             }
1181             var label;
1182             if (url) {
1183                 label = $('<a></a>').attr('href', url);
1184             } else {
1185                 label = $('<span></span>');
1186             }
1187             label.text(status);
1188             if (lat || lon) {
1189                 var latlon = lat + ';' + lon;
1190                 label.attr('title', latlon);
1191                 if (!status) {
1192                     label.text(latlon)
1193                 }
1194             }
1195             wrapper.find('.geo_status').empty().append(label);
1196         },
1197
1198         /**
1199          * Setup function -- DOES NOT trigger actions immediately.
1200          *
1201          * Initializes event handlers for the "Send direct message" link on
1202          * profile pages, setting it up to display a dialog box when clicked.
1203          *
1204          * Unlike the repeat confirmation form, this appears to fetch
1205          * the form _from the original link target_, so the form itself
1206          * doesn't need to be in the current document.
1207          *
1208          * @fixme breaks ability to open link in new window?
1209          */
1210         NewDirectMessage: function () {
1211             NDM = $('.entity_send-a-message a');
1212             NDM.attr({'href': NDM.attr('href') + '&ajax=1'});
1213             NDM.on('click', function () {
1214                 var NDMF = $('.entity_send-a-message form');
1215                 if (NDMF.length === 0) {
1216                     $(this).addClass(SN.C.S.Processing);
1217                     $.get(NDM.attr('href'), null, function (data) {
1218                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1219                         NDMF = $('.entity_send-a-message .form_notice');
1220                         SN.U.FormNoticeXHR(NDMF);
1221                         SN.U.FormNoticeEnhancements(NDMF);
1222                         NDMF.append('<button class="close">&#215;</button>');
1223                         $('.entity_send-a-message button').click(function () {
1224                             NDMF.hide();
1225                             return false;
1226                         });
1227                         NDM.removeClass(SN.C.S.Processing);
1228                     });
1229                 } else {
1230                     NDMF.show();
1231                     $('.entity_send-a-message textarea').focus();
1232                 }
1233                 return false;
1234             });
1235         },
1236
1237         /**
1238          * Return a date object with the current local time on the
1239          * given year, month, and day.
1240          *
1241          * @param {number} year: 4-digit year
1242          * @param {number} month: 0 == January
1243          * @param {number} day: 1 == 1
1244          * @return {Date}
1245          */
1246         GetFullYear: function (year, month, day) {
1247             var date = new Date();
1248             date.setFullYear(year, month, day);
1249
1250             return date;
1251         },
1252
1253         /**
1254          * Check if the current page is a timeline where the current user's
1255          * posts should be displayed immediately on success.
1256          *
1257          * @fixme this should be done in a saner way, with machine-readable
1258          * info about what page we're looking at.
1259          *
1260          * @param {DOMElement} notice: HTML chunk with formatted notice
1261          * @return boolean
1262          */
1263         belongsOnTimeline: function (notice) {
1264             var action = $("body").attr('id');
1265             if (action == 'public') {
1266                 return true;
1267             }
1268
1269             var profileLink = $('#nav_profile a').attr('href');
1270             if (profileLink) {
1271                 var authorUrl = $(notice).find('.h-card.p-author').attr('href');
1272                 if (authorUrl == profileLink) {
1273                     if (action == 'all' || action == 'showstream') {
1274                         // Posts always show on your own friends and profile streams.
1275                         return true;
1276                     }
1277                 }
1278             }
1279
1280             // @fixme tag, group, reply timelines should be feasible as well.
1281             // Mismatch between id-based and name-based user/group links currently complicates
1282             // the lookup, since all our inline mentions contain the absolute links but the
1283             // UI links currently on the page use malleable names.
1284
1285             return false;
1286         },
1287
1288         /**
1289          * Switch to another active input sub-form.
1290          * This will hide the current form (if any), show the new one, and
1291          * update the input type tab selection state.
1292          *
1293          * @param {String} tag
1294          */
1295         switchInputFormTab: function (tag, setFocus) {
1296             if (typeof setFocus === 'undefined') { setFocus = true; }
1297             // The one that's current isn't current anymore
1298             $('.input_form_nav_tab.current').removeClass('current');
1299             if (tag != null) {
1300                 $('#input_form_nav_' + tag).addClass('current');
1301             }
1302
1303             // Don't remove 'current' if we also have the "nonav" class.
1304             // An example would be the message input form. removing
1305             // 'current' will cause the form to vanish from the page.
1306             var nonav = $('.input_form.current.nonav');
1307             if (nonav.length > 0) {
1308                 return;
1309             }
1310
1311             $('.input_form.current').removeClass('current');
1312             if (tag == null) {
1313                 // we're done here, no new inputform to focus on
1314                 return false;
1315             }
1316
1317             var noticeForm = $('#input_form_' + tag)
1318                     .addClass('current')
1319                     .find('.ajax-notice').each(function () {
1320                         var form = $(this);
1321                         SN.Init.NoticeFormSetup(form);
1322                     });
1323             if (setFocus) {
1324                 noticeForm.find('.notice_data-text').focus();
1325             }
1326
1327             return false;
1328         },
1329
1330         showMoreMenuItems: function (menuid) {
1331             $('#' + menuid + ' .more_link').remove();
1332             var selector = '#' + menuid + ' .extended_menu';
1333             var extended = $(selector);
1334             extended.removeClass('extended_menu');
1335             return void(0);
1336         },
1337
1338         /**
1339          * Show a response feedback bit under a form.
1340          *
1341          * @param {Element} form: the new-notice form usually
1342          * @param {String}  cls: CSS class name to use ('error' or 'success')
1343          * @param {String}  text
1344          * @access public
1345          */
1346         showFeedback: function (form, cls, text) {
1347             form.append(
1348                 $('<p class="form_response"></p>')
1349                     .addClass(cls)
1350                     .text(text)
1351             );
1352         },
1353
1354         addCallback: function (ename, callback) {
1355             // initialize to array if it's undefined
1356             if (typeof SN._callbacks[ename] === 'undefined') {
1357                 SN._callbacks[ename] = [];
1358             }
1359             SN._callbacks[ename].push(callback);
1360         },
1361
1362         runCallbacks: function (ename, data) {
1363             if (typeof SN._callbacks[ename] === 'undefined') {
1364                 return;
1365             }
1366             for (cbname in SN._callbacks[ename]) {
1367                 SN._callbacks[ename][cbname](data);
1368             }
1369         }
1370     },
1371
1372     E: {    /* Events */
1373         /* SN.E.ajaxNoticePosted, called when a notice has been posted successfully via an AJAX form
1374             @param  form        the originating form element
1375             @param  data        data from success() callback
1376             @param  textStatus  textStatus from success() callback
1377         */
1378         ajaxNoticePosted: function (form, data, textStatus) {
1379             var commandResult = $('#' + SN.C.S.CommandResult, data);
1380             if (commandResult.length > 0) {
1381                 SN.U.showFeedback(form, 'success', commandResult.text());
1382             } else {
1383                 // New notice post was successful. If on our timeline, show it!
1384                 var notice = document._importNode($('li', data)[0], true);
1385                 var notices = $('#notices_primary .notices:first');
1386                 var replyItem = form.closest('li.notice-reply');
1387
1388                 if (replyItem.length > 0) {
1389                     // If this is an inline reply, remove the form...
1390                     var list = form.closest('.threaded-replies');
1391
1392                     var id = $(notice).attr('id');
1393                     if ($('#' + id).length == 0) {
1394                         $(notice).insertBefore(replyItem);
1395                     } // else Realtime came through before us...
1396
1397                     replyItem.remove();
1398
1399                 } else if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
1400                     // Not a reply. If on our timeline, show it at the top!
1401
1402                     if ($('#' + notice.id).length === 0) {
1403                         var notice_irt_value = form.find('[name=inreplyto]').val();
1404                         var notice_irt = '#notices_primary #notice-' + notice_irt_value;
1405                         if ($('body')[0].id == 'conversation') {
1406                             if (notice_irt_value.length > 0 && $(notice_irt + ' .notices').length < 1) {
1407                                 $(notice_irt).append('<ul class="notices"></ul>');
1408                             }
1409                             $($(notice_irt + ' .notices')[0]).append(notice);
1410                         } else {
1411                             notices.prepend(notice);
1412                         }
1413                         $('#' + notice.id)
1414                             .css({display: 'none'})
1415                             .fadeIn(2500);
1416                         SN.U.NoticeWithAttachment($('#' + notice.id));
1417                         SN.U.switchInputFormTab(null);
1418                     }
1419                 } else {
1420                     // Not on a timeline that this belongs on?
1421                     // Just show a success message.
1422                     // @fixme inline
1423                     SN.U.showFeedback(form, 'success', $('title', data).text());
1424                 }
1425             }
1426             form.resetForm();
1427             form.find('[name=inreplyto]').val('');
1428             form.find('.attach-status').remove();
1429             SN.U.FormNoticeEnhancements(form);
1430
1431             SN.U.runCallbacks('notice_posted', {"notice": notice});
1432         },
1433     },
1434
1435
1436     Init: {
1437         /**
1438          * If user is logged in, run setup code for the new notice form:
1439          *
1440          *  - char counter
1441          *  - AJAX submission
1442          *  - location events
1443          *  - file upload events
1444          */
1445         NoticeForm: function () {
1446             if ($('body.user_in').length > 0) {
1447                 // SN.Init.NoticeFormSetup() will get run
1448                 // when forms get displayed for the first time...
1449
1450                 // Initialize the input form field
1451                 $('#input_form_nav .input_form_nav_tab.current').each(function () {
1452                     current_tab_id = $(this).attr('id').substring('input_form_nav_'.length);
1453                     SN.U.switchInputFormTab(current_tab_id, false);
1454                 });
1455
1456                 // Make inline reply forms self-close when clicking out.
1457                 $('body').on('click', function (e) {
1458                     var openReplies = $('li.notice-reply');
1459                     if (openReplies.length > 0) {
1460                         var target = $(e.target);
1461                         openReplies.each(function () {
1462                             // Did we click outside this one?
1463                             var replyItem = $(this);
1464                             if (replyItem.has(e.target).length == 0) {
1465                                 var textarea = replyItem.find('.notice_data-text:first');
1466                                 var cur = $.trim(textarea.val());
1467                                 // Only close if there's been no edit.
1468                                 if (cur == '' || cur == textarea.data('initialText')) {
1469                                     var parentNotice = replyItem.closest('li.notice');
1470                                     replyItem.hide();
1471                                     parentNotice.find('li.notice-reply-placeholder').show();
1472                                 }
1473                             }
1474                         });
1475                     }
1476                 });
1477             }
1478         },
1479
1480         /**
1481          * Encapsulate notice form setup for a single form.
1482          * Plugins can add extra setup by monkeypatching this
1483          * function.
1484          *
1485          * @param {jQuery} form
1486          */
1487         NoticeFormSetup: function (form) {
1488             if (form.data('NoticeFormSetup')) {
1489                 return false;
1490             }
1491             SN.U.NoticeLocationAttach(form);
1492             SN.U.FormNoticeUniqueID(form);
1493             SN.U.FormNoticeXHR(form);
1494             SN.U.FormNoticeEnhancements(form);
1495             SN.U.NoticeDataAttach(form);
1496             form.data('NoticeFormSetup', true);
1497         },
1498
1499         /**
1500          * Run setup code for notice timeline views items:
1501          *
1502          * - AJAX submission for fave/repeat/reply (if logged in)
1503          * - Attachment link extras ('more' links)
1504          */
1505         Notices: function () {
1506             if ($('body.user_in').length > 0) {
1507                 SN.U.NoticeRepeat();
1508                 SN.U.NoticeReply();
1509                 SN.U.NoticeInlineReplySetup();
1510                 SN.U.NoticeOptionsAjax();
1511             }
1512
1513             SN.U.NoticeAttachments();
1514         },
1515
1516         /**
1517          * Run setup code for user & group profile page header area if logged in:
1518          *
1519          * - AJAX submission for sub/unsub/join/leave/nudge
1520          * - AJAX form popup for direct-message
1521          */
1522         EntityActions: function () {
1523             if ($('body.user_in').length > 0) {
1524                 $(document).on('click', '.form_user_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1525                 $(document).on('click', '.form_user_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1526                 $(document).on('click', '.form_group_join', function () { SN.U.FormXHR($(this)); return false; });
1527                 $(document).on('click', '.form_group_leave', function () { SN.U.FormXHR($(this)); return false; });
1528                 $(document).on('click', '.form_user_nudge', function () { SN.U.FormXHR($(this)); return false; });
1529                 $(document).on('click', '.form_peopletag_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1530                 $(document).on('click', '.form_peopletag_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1531                 $(document).on('click', '.form_user_add_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1532                 $(document).on('click', '.form_user_remove_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1533
1534                 SN.U.NewDirectMessage();
1535             }
1536         },
1537
1538         ProfileSearch: function () {
1539             if ($('body.user_in').length > 0) {
1540                 $(document).on('click', '.form_peopletag_edit_user_search input.submit', function () {
1541                     SN.U.FormProfileSearchXHR($(this).parents('form')); return false;
1542                 });
1543             }
1544         },
1545
1546         /**
1547          * Run setup for the ajax people tags editor
1548          *
1549          * - show edit button
1550          * - set event handle for click on edit button
1551          *   - loads people tag autocompletion data if not already present
1552          *     or if it is stale.
1553          *
1554          */
1555         PeopleTags: function () {
1556             $('.user_profile_tags .editable').append($('<button class="peopletags_edit_button"/>'));
1557
1558             $(document).on('click', '.peopletags_edit_button', function () {
1559                 var form = $(this).parents('dd').eq(0).find('form');
1560                 // We can buy time from the above animation
1561
1562                 $.ajax({
1563                     url: _peopletagAC,
1564                     dataType: 'json',
1565                     data: {token: $('#token').val()},
1566                     ifModified: true,
1567                     success: function (data) {
1568                         // item.label is used to match
1569                         for (i=0; i < data.length; i++) {
1570                             data[i].label = data[i].tag;
1571                         }
1572
1573                         SN.C.PtagACData = data;
1574                     }
1575                 });
1576
1577                 $(this).parents('ul').eq(0).fadeOut(200, function () {form.fadeIn(200).find('input#tags')});
1578             });
1579
1580             $(document).on('click', '.user_profile_tags form .submit', function () {
1581                 SN.U.FormPeopletagsXHR($(this).parents('form')); return false;
1582             });
1583         },
1584
1585         /**
1586          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1587          */
1588         AjaxForms: function () {
1589             $(document).on('submit', 'form.ajax', function () {
1590                 SN.U.FormXHR($(this));
1591                 return false;
1592             });
1593             $(document).on('click', 'form.ajax input[type=submit]', function () {
1594                 // Some forms rely on knowing which submit button was clicked.
1595                 // Save a hidden input field which'll be picked up during AJAX
1596                 // submit...
1597                 var button = $(this);
1598                 var form = button.closest('form');
1599                 form.find('.hidden-submit-button').remove();
1600                 $('<input class="hidden-submit-button" type="hidden" />')
1601                     .attr('name', button.attr('name'))
1602                     .val(button.val())
1603                     .appendTo(form);
1604             });
1605         },
1606
1607         /**
1608          * Add logic to any file upload forms to handle file size limits,
1609          * on browsers that support basic FileAPI.
1610          */
1611         UploadForms: function () {
1612             $('input[type=file]').change(function (event) {
1613                 if (typeof this.files === "object" && this.files.length > 0) {
1614                     var size = 0;
1615                     for (var i = 0; i < this.files.length; i++) {
1616                         size += this.files[i].size;
1617                     }
1618
1619                     var max = SN.U.maxFileSize($(this.form));
1620                     if (max > 0 && size > max) {
1621                         var msg = 'File too large: maximum upload size is %d bytes.';
1622                         alert(msg.replace('%d', max));
1623
1624                         // Clear the files.
1625                         $(this).val('');
1626                         event.preventDefault();
1627                         return false;
1628                     }
1629                 }
1630             });
1631         },
1632
1633         CheckBoxes: function () {
1634             $("span[class='checkbox-wrapper']").addClass("unchecked");
1635             $(".checkbox-wrapper").click(function () {
1636                 if ($(this).children("input").prop("checked")) {
1637                     // uncheck
1638                     $(this).children("input").prop("checked", false);
1639                     $(this).removeClass("checked");
1640                     $(this).addClass("unchecked");
1641                     $(this).children("label").text("Private?");
1642                 } else {
1643                     // check
1644                     $(this).children("input").prop("checked", true);
1645                     $(this).removeClass("unchecked");
1646                     $(this).addClass("checked");
1647                     $(this).children("label").text("Private");
1648                 }
1649             });
1650         }
1651     }
1652 };
1653
1654 /**
1655  * Run initialization functions on DOM-ready.
1656  *
1657  * Note that if we're waiting on other scripts to load, this won't happen
1658  * until that's done. To load scripts asynchronously without delaying setup,
1659  * don't start them loading until after DOM-ready time!
1660  */
1661 $(function () {
1662     SN.Init.AjaxForms();
1663     SN.Init.UploadForms();
1664     SN.Init.CheckBoxes();
1665     if ($('.' + SN.C.S.FormNotice).length > 0) {
1666         SN.Init.NoticeForm();
1667     }
1668     if ($('#content .notices').length > 0) {
1669         SN.Init.Notices();
1670     }
1671     if ($('#content .entity_actions').length > 0) {
1672         SN.Init.EntityActions();
1673     }
1674     if ($('#profile_search_results').length > 0) {
1675         SN.Init.ProfileSearch();
1676     }
1677     if ($('.user_profile_tags .editable').length > 0) {
1678         SN.Init.PeopleTags();
1679     }
1680 });
1681