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      * Map of localized message strings exported to script from the PHP
  65      * side via Action::getScriptMessages().
  66      *
  67      * Retrieve them via SN.msg(); this array is an implementation detail.
  68      *
  69      * @access private
  70      */
  71     messages: {},
  72
  73     /**
  74      * Grabs a localized string that's been previously exported to us
  75      * from server-side code via Action::getScriptMessages().
  76      *
  77      * @example alert(SN.msg('coolplugin-failed'));
  78      *
  79      * @param {String} key: string key name to pull from message index
  80      * @return matching localized message string
  81      */
  82     msg: function (key) {
  83         if (SN.messages[key] === undefined) {
  84             return '[' + key + ']';
  85         }
  86         return SN.messages[key];
  87     },
  88
  89     U: { // Utils
  90         /**
  91          * Setup function -- DOES NOT trigger actions immediately.
  92          *
  93          * Sets up event handlers on the new notice form.
  94          *
  95          * @param {jQuery} form: jQuery object whose first matching element is the form
  96          * @access private
  97          */
  98         FormNoticeEnhancements: function (form) {
  99             if ($.data(form[0], 'ElementData') === undefined) {
 100                 var MaxLength = form.find('.count').text();
 101                 if (MaxLength === undefined) {
 102                     MaxLength = SN.C.I.MaxLength;
 103                 }
 104                 $.data(form[0], 'ElementData', {MaxLength: MaxLength});
 105
 106                 SN.U.Counter(form);
 107
 108                 var NDT = form.find('.notice_data-text:first');
 109
 110                 NDT.on('keyup', function (e) {
 111                     SN.U.Counter(form);
 112                 });
 113
 114                 var delayedUpdate = function (e) {
 115                     // Cut and paste events fire *before* the operation,
 116                     // so we need to trigger an update in a little bit.
 117                     // This would be so much easier if the 'change' event
 118                     // actually fired every time the value changed. :P
 119                     window.setTimeout(function () {
 120                         SN.U.Counter(form);
 121                     }, 50);
 122                 };
 123                 // Note there's still no event for mouse-triggered 'delete'.
 124                 NDT.on('cut', delayedUpdate)
 125                     .on('paste', delayedUpdate);
 126             } else {
 127                 form.find('.count').text($.data(form[0], 'ElementData').MaxLength);
 128             }
 129         },
 130
 131         /**
 132          * To be called from event handlers on the notice import form.
 133          * Triggers an update of the remaining-characters counter.
 134          *
 135          * Additional counter updates will be suppressed during the
 136          * next half-second to avoid flooding the layout engine with
 137          * updates, followed by another automatic check.
 138          *
 139          * The maximum length is pulled from data established by
 140          * FormNoticeEnhancements.
 141          *
 142          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 143          * @access private
 144          */
 145         Counter: function (form) {
 146             SN.C.I.FormNoticeCurrent = form;
 147
 148             var MaxLength = $.data(form[0], 'ElementData').MaxLength;
 149
 150             if (MaxLength <= 0) {
 151                 return;
 152             }
 153
 154             var remaining = MaxLength - SN.U.CharacterCount(form);
 155             var counter = form.find('.count');
 156
 157             if (remaining.toString() != counter.text()) {
 158                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 159                     if (counter.text() != String(remaining)) {
 160                         counter.text(remaining);
 161                     }
 162                     if (remaining < 0) {
 163                         form.addClass(SN.C.S.Warning);
 164                     } else {
 165                         form.removeClass(SN.C.S.Warning);
 166                     }
 167                     // Skip updates for the next 500ms.
 168                     // On slower hardware, updating on every keypress is unpleasant.
 169                     if (!SN.C.I.CounterBlackout) {
 170                         SN.C.I.CounterBlackout = true;
 171                         SN.C.I.FormNoticeCurrent = form;
 172                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 173                     }
 174                 }
 175             }
 176         },
 177
 178         /**
 179          * Pull the count of characters in the current edit field.
 180          * Plugins replacing the edit control may need to override this.
 181          *
 182          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 183          * @return number of chars
 184          */
 185         CharacterCount: function (form) {
 186             return form.find('.notice_data-text:first').val().length;
 187         },
 188
 189         /**
 190          * Called internally after the counter update blackout period expires;
 191          * runs another update to make sure we didn't miss anything.
 192          *
 193          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 194          * @access private
 195          */
 196         ClearCounterBlackout: function (form) {
 197             // Allow keyup events to poke the counter again
 198             SN.C.I.CounterBlackout = false;
 199             // Check if the string changed since we last looked
 200             SN.U.Counter(form);
 201         },
 202
 203         /**
 204          * Helper function to rewrite default HTTP form action URLs to HTTPS
 205          * so we can actually fetch them when on an SSL page in ssl=sometimes
 206          * mode.
 207          *
 208          * It would be better to output URLs that didn't hardcode protocol
 209          * and hostname in the first place...
 210          *
 211          * @param {String} url
 212          * @return string
 213          */
 214         RewriteAjaxAction: function (url) {
 215             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 216             if (document.location.protocol === 'https:' && url.substr(0, 5) === 'http:') {
 217                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 218             }
 219             return url;
 220         },
 221
 222         FormNoticeUniqueID: function (form) {
 223             var oldId = form.attr('id');
 224             var newId = 'form_notice_' + Math.floor(Math.random()*999999999);
 225             var attrs = ['name', 'for', 'id'];
 226             for (var key in attrs) {
 227                 form.find("[" + attrs[key] + "~='" + oldId + "']").each(function () {
 228                         var newAttr = $(this).attr(attrs[key]).replace(oldId, newId);
 229                         $(this).attr(attrs[key], newAttr);
 230                     });
 231             }
 232         },
 233
 234         /**
 235          * Grabs form data and submits it asynchronously, with 'ajax=1'
 236          * parameter added to the rest.
 237          *
 238          * If a successful response includes another form, that form
 239          * will be extracted and copied in, replacing the original form.
 240          * If there's no form, the first paragraph will be used.
 241          *
 242          * This will automatically be applied on the 'submit' event for
 243          * any form with the 'ajax' class.
 244          *
 245          * @fixme can sometimes explode confusingly if returnd data is bogus
 246          * @fixme error handling is pretty vague
 247          * @fixme can't submit file uploads
 248          *
 249          * @param {jQuery} form: jQuery object whose first element is a form
 250          * @param function onSuccess: something extra to do on success
 251          *
 252          * @access public
 253          */
 254         FormXHR: function (form, onSuccess) {
 255             $.ajax({
 256                 type: 'POST',
 257                 dataType: 'xml',
 258                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 259                 data: form.serialize() + '&ajax=1',
 260                 beforeSend: function (xhr) {
 261                     form
 262                         .addClass(SN.C.S.Processing)
 263                         .find('.submit')
 264                             .addClass(SN.C.S.Disabled)
 265                             .prop(SN.C.S.Disabled, true);
 266                 },
 267                 error: function (xhr, textStatus, errorThrown) {
 268                     // If the server end reported an error from StatusNet,
 269                     // find it -- otherwise we'll see what was reported
 270                     // from the browser.
 271                     var errorReported = null;
 272                     if (xhr.responseXML) {
 273                         errorReported = $('#error', xhr.responseXML).text();
 274                     }
 275                     window.alert(errorReported || errorThrown || textStatus);
 276
 277                     // Restore the form to original state.
 278                     // Hopefully. :D
 279                     form
 280                         .removeClass(SN.C.S.Processing)
 281                         .find('.submit')
 282                             .removeClass(SN.C.S.Disabled)
 283                             .prop(SN.C.S.Disabled, false);
 284                 },
 285                 success: function (data, textStatus) {
 286                     if ($('form', data)[0] !== undefined) {
 287                         var form_new = document._importNode($('form', data)[0], true);
 288                         form.replaceWith(form_new);
 289                         if (onSuccess) {
 290                             onSuccess();
 291                         }
 292                     } else if ($('p', data)[0] !== undefined) {
 293                         form.replaceWith(document._importNode($('p', data)[0], true));
 294                         if (onSuccess) {
 295                             onSuccess();
 296                         }
 297                     } else {
 298                         window.alert('Unknown error.');
 299                     }
 300                 }
 301             });
 302         },
 303
 304         /**
 305          * Setup function -- DOES NOT trigger actions immediately.
 306          *
 307          * Sets up event handlers for special-cased async submission of the
 308          * notice-posting form, including some pre-post validation.
 309          *
 310          * Unlike FormXHR() this does NOT submit the form immediately!
 311          * It sets up event handlers so that any method of submitting the
 312          * form (click on submit button, enter, submit() etc) will trigger
 313          * it properly.
 314          *
 315          * Also unlike FormXHR(), this system will use a hidden iframe
 316          * automatically to handle file uploads via <input type="file">
 317          * controls.
 318          *
 319          * @fixme tl;dr
 320          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 321          * @fixme error handling is unreliable
 322          * @fixme cookieValue is a global variable, but probably shouldn't be
 323          * @fixme saving the location cache cookies should be split out
 324          * @fixme some error messages are hardcoded english: needs i18n
 325          *
 326          * @param {jQuery} form: jQuery object whose first element is a form
 327          *
 328          * @access public
 329          */
 330         FormNoticeXHR: function (form) {
 331             SN.C.I.NoticeDataGeo = {};
 332             form.append('<input type="hidden" name="ajax" value="1"/>');
 333
 334             // Make sure we don't have a mixed HTTP/HTTPS submission...
 335             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 336
 337             /**
 338              * Show a response feedback bit under the new-notice dialog.
 339              *
 340              * @param {String} cls: CSS class name to use ('error' or 'success')
 341              * @param {String} text
 342              * @access private
 343              */
 344             var showFeedback = function (cls, text) {
 345                 form.append(
 346                     $('<p class="form_response"></p>')
 347                         .addClass(cls)
 348                         .text(text)
 349                 );
 350             };
 351
 352             /**
 353              * Hide the previous response feedback, if any.
 354              */
 355             var removeFeedback = function () {
 356                 form.find('.form_response').remove();
 357             };
 358
 359             form.ajaxForm({
 360                 dataType: 'xml',
 361                 timeout: '60000',
 362                 beforeSend: function (formData) {
 363                     if (form.find('.notice_data-text:first').val() == '') {
 364                         form.addClass(SN.C.S.Warning);
 365                         return false;
 366                     }
 367                     form
 368                         .addClass(SN.C.S.Processing)
 369                         .find('.submit')
 370                             .addClass(SN.C.S.Disabled)
 371                             .prop(SN.C.S.Disabled, true);
 372
 373                     SN.U.normalizeGeoData(form);
 374
 375                     return true;
 376                 },
 377                 error: function (xhr, textStatus, errorThrown) {
 378                     form
 379                         .removeClass(SN.C.S.Processing)
 380                         .find('.submit')
 381                             .removeClass(SN.C.S.Disabled)
 382                             .prop(SN.C.S.Disabled, false);
 383                     removeFeedback();
 384                     if (textStatus == 'timeout') {
 385                         // @fixme i18n
 386                         showFeedback('error', 'Sorry! We had trouble sending your notice. The servers are overloaded. Please try again, and contact the site administrator if this problem persists.');
 387                     } else {
 388                         var response = SN.U.GetResponseXML(xhr);
 389                         if ($('.' + 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                                 showFeedback('error', '(Sorry! We had trouble sending your notice (' + xhr.status + ' ' + xhr.statusText + '). Please report the problem to the site administrator if this happens again.');
 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                         showFeedback('error', errorResult.text());
 409                     } else {
 410                         var commandResult = $('#' + SN.C.S.CommandResult, data);
 411                         if (commandResult.length > 0) {
 412                             showFeedback('success', commandResult.text());
 413                         } else {
 414                             // New notice post was successful. If on our timeline, show it!
 415                             var notice = document._importNode($('li', data)[0], true);
 416                             var notices = $('#notices_primary .notices:first');
 417                             var replyItem = form.closest('li.notice-reply');
 418
 419                             if (replyItem.length > 0) {
 420                                 // If this is an inline reply, remove the form...
 421                                 var list = form.closest('.threaded-replies');
 422
 423                                 var id = $(notice).attr('id');
 424                                 if ($('#' + id).length == 0) {
 425                                     $(notice).insertBefore(replyItem);
 426                                 } // else Realtime came through before us...
 427
 428                                 replyItem.remove();
 429
 430                             } else if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
 431                                 // Not a reply. If on our timeline, show it at the top!
 432
 433                                 if ($('#' + notice.id).length === 0) {
 434                                     var notice_irt_value = form.find('[name=inreplyto]').val();
 435                                     var notice_irt = '#notices_primary #notice-' + notice_irt_value;
 436                                     if ($('body')[0].id == 'conversation') {
 437                                         if (notice_irt_value.length > 0 && $(notice_irt + ' .notices').length < 1) {
 438                                             $(notice_irt).append('<ul class="notices"></ul>');
 439                                         }
 440                                         $($(notice_irt + ' .notices')[0]).append(notice);
 441                                     } else {
 442                                         notices.prepend(notice);
 443                                     }
 444                                     $('#' + notice.id)
 445                                         .css({display: 'none'})
 446                                         .fadeIn(2500);
 447                                     SN.U.NoticeWithAttachment($('#' + notice.id));
 448                                     SN.U.switchInputFormTab(null);
 449                                 }
 450                             } else {
 451                                 // Not on a timeline that this belongs on?
 452                                 // Just show a success message.
 453                                 // @fixme inline
 454                                 showFeedback('success', $('title', data).text());
 455                             }
 456                         }
 457                         form.resetForm();
 458                         form.find('[name=inreplyto]').val('');
 459                         form.find('.attach-status').remove();
 460                         SN.U.FormNoticeEnhancements(form);
 461                     }
 462                 },
 463                 complete: function (xhr, textStatus) {
 464                     form
 465                         .removeClass(SN.C.S.Processing)
 466                         .find('.submit')
 467                             .prop(SN.C.S.Disabled, false)
 468                             .removeClass(SN.C.S.Disabled);
 469
 470                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 471                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 472                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 473                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 474                     form.find('[name=notice_data-geo]').prop('checked', SN.C.I.NoticeDataGeo.NDG);
 475                 }
 476             });
 477         },
 478
 479         FormProfileSearchXHR: function (form) {
 480             $.ajax({
 481                 type: 'POST',
 482                 dataType: 'xml',
 483                 url: form.attr('action'),
 484                 data: form.serialize() + '&ajax=1',
 485                 beforeSend: function (xhr) {
 486                     form
 487                         .addClass(SN.C.S.Processing)
 488                         .find('.submit')
 489                             .addClass(SN.C.S.Disabled)
 490                             .prop(SN.C.S.Disabled, true);
 491                 },
 492                 error: function (xhr, textStatus, errorThrown) {
 493                     window.alert(errorThrown || textStatus);
 494                 },
 495                 success: function (data, textStatus) {
 496                     var results_placeholder = $('#profile_search_results');
 497                     if ($('ul', data)[0] !== undefined) {
 498                         var list = document._importNode($('ul', data)[0], true);
 499                         results_placeholder.replaceWith(list);
 500                     } else {
 501                         var _error = $('<li/>').append(document._importNode($('p', data)[0], true));
 502                         results_placeholder.html(_error);
 503                     }
 504                     form
 505                         .removeClass(SN.C.S.Processing)
 506                         .find('.submit')
 507                             .removeClass(SN.C.S.Disabled)
 508                             .prop(SN.C.S.Disabled, false);
 509                 }
 510             });
 511         },
 512
 513         FormPeopletagsXHR: function (form) {
 514             $.ajax({
 515                 type: 'POST',
 516                 dataType: 'xml',
 517                 url: form.attr('action'),
 518                 data: form.serialize() + '&ajax=1',
 519                 beforeSend: function (xhr) {
 520                     form.find('.submit')
 521                             .addClass(SN.C.S.Processing)
 522                             .addClass(SN.C.S.Disabled)
 523                             .prop(SN.C.S.Disabled, true);
 524                 },
 525                 error: function (xhr, textStatus, errorThrown) {
 526                     window.alert(errorThrown || textStatus);
 527                 },
 528                 success: function (data, textStatus) {
 529                     var results_placeholder = form.parents('.entity_tags');
 530                     if ($('.entity_tags', data)[0] !== undefined) {
 531                         var tags = document._importNode($('.entity_tags', data)[0], true);
 532                         $(tags).find('.editable').append($('<button class="peopletags_edit_button"/>'));
 533                         results_placeholder.replaceWith(tags);
 534                     } else {
 535                         results_placeholder.find('p').remove();
 536                         results_placeholder.append(document._importNode($('p', data)[0], true));
 537                         form.removeClass(SN.C.S.Processing)
 538                             .find('.submit')
 539                                 .removeClass(SN.C.S.Disabled)
 540                                 .prop(SN.C.S.Disabled, false);
 541                     }
 542                 }
 543             });
 544         },
 545
 546         normalizeGeoData: function (form) {
 547             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 548             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 549             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 550             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 551             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked'); // @fixme (does this still need to be fixed somehow?)
 552
 553             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 554
 555             if (cookieValue !== undefined && cookieValue != 'disabled') {
 556                 cookieValue = JSON.parse(cookieValue);
 557                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 558                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 559                 if (cookieValue.NLNS) {
 560                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 561                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 562                 } else {
 563                     form.find('[name=location_ns]').val('');
 564                     form.find('[name=location_id]').val('');
 565                 }
 566             }
 567             if (cookieValue == 'disabled') {
 568                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', false).prop('checked');
 569             } else {
 570                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', true).prop('checked');
 571             }
 572
 573         },
 574
 575         /**
 576          * Fetch an XML DOM from an XHR's response data.
 577          *
 578          * Works around unavailable responseXML when document.domain
 579          * has been modified by Meteor or other tools, in some but not
 580          * all browsers.
 581          *
 582          * @param {XMLHTTPRequest} xhr
 583          * @return DOMDocument
 584          */
 585         GetResponseXML: function (xhr) {
 586             try {
 587                 return xhr.responseXML;
 588             } catch (e) {
 589                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 590             }
 591         },
 592
 593         /**
 594          * Setup function -- DOES NOT trigger actions immediately.
 595          *
 596          * Sets up event handlers on all visible notice's option <a> elements
 597          * with the "popup" class so they behave as expected with AJAX.
 598          *
 599          * (without javascript the link goes to a page that expects you to verify
 600          * the action through a form)
 601          *
 602          * @access private
 603          */
 604         NoticeOptionsAjax: function () {
 605             $(document).on('click', '.notice-options > a.popup', function (e) {
 606                 e.preventDefault();
 607                 var noticeEl = $(this).closest('.notice');
 608                 $.ajax({
 609                     url: $(this).attr('href'),
 610                     data: {ajax: 1},
 611                     success: function (data, textStatus, xhr) {
 612                         SN.U.NoticeOptionPopup(data, noticeEl);
 613                     },
 614                 });
 615                 return false;
 616             });
 617         },
 618
 619         NoticeOptionPopup: function (data, noticeEl) {
 620             title = $('head > title', data).text();
 621             body = $('body', data).html();
 622             dialog = $(body).dialog({
 623                     height: "auto",
 624                     width: "auto",
 625                     modal: true,
 626                     resizable: true,
 627                     title: title,
 628                 });
 629         },
 630
 631         /**
 632          * Setup function -- DOES NOT trigger actions immediately.
 633          *
 634          * Sets up event handlers on all visible notice's reply buttons to
 635          * tweak the new-notice form with needed variables and focus it
 636          * when pushed.
 637          *
 638          * (This replaces the default reply button behavior to submit
 639          * directly to a form which comes back with a specialized page
 640          * with the form data prefilled.)
 641          *
 642          * @access private
 643          */
 644         NoticeReply: function () {
 645             $(document).on('click', '#content .notice_reply', function (e) {
 646                 e.preventDefault();
 647                 var notice = $(this).closest('li.notice');
 648                 SN.U.NoticeInlineReplyTrigger(notice);
 649                 return false;
 650             });
 651         },
 652
 653         /**
 654          * Stub -- kept for compat with plugins for now.
 655          * @access private
 656          */
 657         NoticeReplyTo: function (notice) {
 658         },
 659
 660         /**
 661          * Open up a notice's inline reply box.
 662          *
 663          * @param {jQuery} notice: jQuery object containing one notice
 664          * @param {String} initialText
 665          */
 666         NoticeInlineReplyTrigger: function (notice, initialText) {
 667             // Find the notice we're replying to...
 668             var id = $($('.notice_id', notice)[0]).text();
 669             var replyForm;
 670             var parentNotice = notice;
 671             var stripForm = true; // strip a couple things out of reply forms that are inline
 672
 673             var list = notice.find('.threaded-replies');
 674             if (list.length == 0) {
 675                 list = notice.closest('.threaded-replies');
 676             }
 677             if (list.length == 0) {
 678                 list = $('<ul class="notices threaded-replies xoxo"></ul>');
 679                 notice.append(list);
 680                 list = notice.find('.threaded-replies');
 681             }
 682
 683             var nextStep = function () {
 684                 // Override...?
 685                 replyForm.find('input[name=inreplyto]').val(id);
 686                 if (stripForm) {
 687                     // Don't do this for old-school reply form, as they don't come back!
 688                     replyForm.find('#notice_to').prop('disabled', true).hide();
 689                     replyForm.find('#notice_private').prop('disabled', true).hide();
 690                     replyForm.find('label[for=notice_to]').hide();
 691                     replyForm.find('label[for=notice_private]').hide();
 692                 }
 693                 replyItem.show();
 694
 695                 // Set focus...
 696                 var text = replyForm.find('textarea');
 697                 if (text.length == 0) {
 698                     throw "No textarea";
 699                 }
 700                 var replyto = '';
 701                 if (initialText) {
 702                     replyto = initialText + ' ';
 703                 }
 704                 text.val(replyto + text.val().replace(new RegExp(replyto, 'i'), ''));
 705                 text.data('initialText', $.trim(initialText));
 706                 text.focus();
 707                 if (text[0].setSelectionRange) {
 708                     var len = text.val().length;
 709                     text[0].setSelectionRange(len, len);
 710                 }
 711             };
 712
 713             // Create the reply form entry
 714             var replyItem = $('li.notice-reply', list);
 715             if (replyItem.length == 0) {
 716                 replyItem = $('<li class="notice-reply"></li>');
 717             }
 718             replyForm = replyItem.children('form');
 719             if (replyForm.length == 0) {
 720                 // Let's try another trick to avoid fetching by URL
 721                 var noticeForm = $('#input_form_status > form');
 722                 if (noticeForm.length == 0) {
 723                     // No notice form found on the page, so let's just
 724                     // fetch a fresh copy of the notice form over AJAX.
 725                     $.ajax({
 726                         url: SN.V.urlNewNotice,
 727                         data: {ajax: 1, inreplyto: id},
 728                         success: function (data, textStatus, xhr) {
 729                             var formEl = document._importNode($('form', data)[0], true);
 730                             replyForm = $(formEl);
 731                             replyItem.append(replyForm);
 732                             list.append(replyItem);
 733
 734                             SN.Init.NoticeFormSetup(replyForm);
 735                             nextStep();
 736                         },
 737                     });
 738                     // We do everything relevant in 'success' above
 739                     return;
 740                 }
 741                 replyForm = noticeForm.clone();
 742                 SN.Init.NoticeFormSetup(replyForm);
 743                 replyItem.append(replyForm);
 744                 list.append(replyItem);
 745             }
 746             // replyForm is set, we're not fetching by URL...
 747             // Next setp is to configure in-reply-to etc.
 748             nextStep();
 749         },
 750
 751         /**
 752          * Setup function -- DOES NOT apply immediately.
 753          *
 754          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 755          */
 756         NoticeInlineReplySetup: function () {
 757             // Expand conversation links
 758             $(document).on('click', 'li.notice-reply-comments a', function () {
 759                     var url = $(this).attr('href');
 760                     var area = $(this).closest('.threaded-replies');
 761                     $.ajax({
 762                         url: url,
 763                         data: {ajax: 1},
 764                         success: function (data, textStatus, xhr) {
 765                             var replies = $('.threaded-replies', data);
 766                             if (replies.length) {
 767                                 area.replaceWith(document._importNode(replies[0], true));
 768                             }
 769                         },
 770                     });
 771                     return false;
 772                 });
 773         },
 774
 775         /**
 776          * Setup function -- DOES NOT trigger actions immediately.
 777          *
 778          * Sets up event handlers for repeat forms to toss up a confirmation
 779          * popout before submitting.
 780          *
 781          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 782          *
 783          */
 784         NoticeRepeat: function () {
 785             $('body').on('click', '.form_repeat', function (e) {
 786                 e.preventDefault();
 787
 788                 SN.U.NoticeRepeatConfirmation($(this));
 789                 return false;
 790             });
 791         },
 792
 793         /**
 794          * Shows a confirmation dialog box variant of the repeat button form.
 795          * This seems to use a technique where the repeat form contains
 796          * _both_ a standalone button _and_ text and buttons for a dialog.
 797          * The dialog will close after its copy of the form is submitted,
 798          * or if you click its 'close' button.
 799          *
 800          * The dialog is created by duplicating the original form and changing
 801          * its style; while clever, this is hard to generalize and probably
 802          * duplicates a lot of unnecessary HTML output.
 803          *
 804          * @fixme create confirmation dialogs through a generalized interface
 805          * that can be reused instead of hardcoded text and styles.
 806          *
 807          * @param {jQuery} form
 808          */
 809         NoticeRepeatConfirmation: function (form) {
 810             var submit_i = form.find('.submit');
 811
 812             var submit = submit_i.clone();
 813             submit
 814                 .addClass('submit_dialogbox')
 815                 .removeClass('submit');
 816             form.append(submit);
 817             submit.on('click', function () { SN.U.FormXHR(form); return false; });
 818
 819             submit_i.hide();
 820
 821             form
 822                 .addClass('dialogbox')
 823                 .append('<button class="close">&#215;</button>')
 824                 .closest('.notice-options')
 825                     .addClass('opaque');
 826
 827             form.find('button.close').click(function () {
 828                 $(this).remove();
 829
 830                 form
 831                     .removeClass('dialogbox')
 832                     .closest('.notice-options')
 833                         .removeClass('opaque');
 834
 835                 form.find('.submit_dialogbox').remove();
 836                 form.find('.submit').show();
 837
 838                 return false;
 839             });
 840         },
 841
 842         /**
 843          * Setup function -- DOES NOT trigger actions immediately.
 844          *
 845          * Goes through all notices currently displayed and sets up attachment
 846          * handling if needed.
 847          */
 848         NoticeAttachments: function () {
 849             $('.notice a.attachment').each(function () {
 850                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 851             });
 852         },
 853
 854         /**
 855          * Setup function -- DOES NOT trigger actions immediately.
 856          *
 857          * Sets up special attachment link handling if needed. Currently this
 858          * consists only of making the "more" button used for OStatus message
 859          * cropping turn into an auto-expansion button that loads the full
 860          * text from an attachment file.
 861          *
 862          * @param {jQuery} notice
 863          */
 864         NoticeWithAttachment: function (notice) {
 865             if (notice.find('.attachment').length === 0) {
 866                 return;
 867             }
 868
 869                         $(document).on('click','.attachment.more',function () {
 870                                 var m = $(this);
 871                                 m.addClass(SN.C.S.Processing);
 872                                 $.get(m.attr('href'), {ajax: 1}, function (data) {
 873                                         m.parent('.e-content').html($(data).find('#attachment_view .e-content').html());
 874                                 });
 875
 876                                 return false;
 877                         });
 878
 879         },
 880
 881         /**
 882          * Setup function -- DOES NOT trigger actions immediately.
 883          *
 884          * Sets up event handlers for the file-attachment widget in the
 885          * new notice form. When a file is selected, a box will be added
 886          * below the text input showing the filename and, if supported
 887          * by the browser, a thumbnail preview.
 888          *
 889          * This preview box will also allow removing the attachment
 890          * prior to posting.
 891          *
 892          * @param {jQuery} form
 893          */
 894         NoticeDataAttach: function (form) {
 895             var i;
 896             var NDA = form.find('input[type=file]');
 897             NDA.change(function (event) {
 898                 form.find('.attach-status').remove();
 899
 900                 var filename = $(this).val();
 901                 if (!filename) {
 902                     // No file -- we've been tricked!
 903                     return false;
 904                 }
 905
 906                 var attachStatus = $('<div class="attach-status ' + SN.C.S.Success + '"><code></code> <button class="close">&#215;</button></div>');
 907                 attachStatus.find('code').text(filename);
 908                 attachStatus.find('button').click(function () {
 909                     attachStatus.remove();
 910                     NDA.val('');
 911
 912                     return false;
 913                 });
 914                 form.append(attachStatus);
 915
 916                 if (typeof this.files === "object") {
 917                     // Some newer browsers will let us fetch the files for preview.
 918                     for (i = 0; i < this.files.length; i++) {
 919                         SN.U.PreviewAttach(form, this.files[i]);
 920                     }
 921                 }
 922             });
 923         },
 924
 925         /**
 926          * Get PHP's MAX_FILE_SIZE setting for this form;
 927          * used to apply client-side file size limit checks.
 928          *
 929          * @param {jQuery} form
 930          * @return int max size in bytes; 0 or negative means no limit
 931          */
 932         maxFileSize: function (form) {
 933             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 934             if (max) {
 935                 return parseInt(max);
 936             }
 937             return 0;
 938         },
 939
 940         /**
 941          * For browsers with FileAPI support: make a thumbnail if possible,
 942          * and append it into the attachment display widget.
 943          *
 944          * Known good:
 945          * - Firefox 3.6.6, 4.0b7
 946          * - Chrome 8.0.552.210
 947          *
 948          * Known ok metadata, can't get contents:
 949          * - Safari 5.0.2
 950          *
 951          * Known fail:
 952          * - Opera 10.63, 11 beta (no input.files interface)
 953          *
 954          * @param {jQuery} form
 955          * @param {File} file
 956          *
 957          * @todo use configured thumbnail size
 958          * @todo detect pixel size?
 959          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 960          */
 961         PreviewAttach: function (form, file) {
 962             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 963             var preview = true;
 964
 965             var blobAsDataURL;
 966             if (window.createObjectURL !== undefined) {
 967                 /**
 968                  * createObjectURL lets us reference the file directly from an <img>
 969                  * This produces a compact URL with an opaque reference to the file,
 970                  * which we can reference immediately.
 971                  *
 972                  * - Firefox 3.6.6: no
 973                  * - Firefox 4.0b7: no
 974                  * - Safari 5.0.2: no
 975                  * - Chrome 8.0.552.210: works!
 976                  */
 977                 blobAsDataURL = function (blob, callback) {
 978                     callback(window.createObjectURL(blob));
 979                 };
 980             } else if (window.FileReader !== undefined) {
 981                 /**
 982                  * FileAPI's FileReader can build a data URL from a blob's contents,
 983                  * but it must read the file and build it asynchronously. This means
 984                  * we'll be passing a giant data URL around, which may be inefficient.
 985                  *
 986                  * - Firefox 3.6.6: works!
 987                  * - Firefox 4.0b7: works!
 988                  * - Safari 5.0.2: no
 989                  * - Chrome 8.0.552.210: works!
 990                  */
 991                 blobAsDataURL = function (blob, callback) {
 992                     var reader = new FileReader();
 993                     reader.onload = function (event) {
 994                         callback(reader.result);
 995                     };
 996                     reader.readAsDataURL(blob);
 997                 };
 998             } else {
 999                 preview = false;
1000             }
1001
1002             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
1003             if ($.inArray(file.type, imageTypes) == -1) {
1004                 // We probably don't know how to show the file.
1005                 preview = false;
1006             }
1007
1008             var maxSize = 8 * 1024 * 1024;
1009             if (file.size > maxSize) {
1010                 // Don't kill the browser trying to load some giant image.
1011                 preview = false;
1012             }
1013
1014             if (preview) {
1015                 blobAsDataURL(file, function (url) {
1016                     var img = $('<img>')
1017                         .attr('title', tooltip)
1018                         .attr('alt', tooltip)
1019                         .attr('src', url)
1020                         .attr('style', 'height: 120px');
1021                     form.find('.attach-status').append(img);
1022                 });
1023             } else {
1024                 var img = $('<div></div>').text(tooltip);
1025                 form.find('.attach-status').append(img);
1026             }
1027         },
1028
1029         /**
1030          * Setup function -- DOES NOT trigger actions immediately.
1031          *
1032          * Initializes state for the location-lookup features in the
1033          * new-notice form. Seems to set up some event handlers for
1034          * triggering lookups and using the new values.
1035          *
1036          * @param {jQuery} form
1037          *
1038          * @fixme tl;dr
1039          * @fixme there's not good visual state update here, so users have a
1040          *        hard time figuring out if it's working or fixing if it's wrong.
1041          *
1042          */
1043         NoticeLocationAttach: function (form) {
1044             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
1045             var NLat = form.find('[name=lat]');
1046             var NLon = form.find('[name=lon]');
1047             var NLNS = form.find('[name=location_ns]').val();
1048             var NLID = form.find('[name=location_id]').val();
1049             var NLN = ''; // @fixme
1050             var NDGe = form.find('[name=notice_data-geo]');
1051             var check = form.find('[name=notice_data-geo]');
1052             var label = form.find('label.notice_data-geo');
1053
1054             function removeNoticeDataGeo(error) {
1055                 label
1056                     .attr('title', $.trim(label.text()))
1057                     .removeClass('checked');
1058
1059                 form.find('[name=lat]').val('');
1060                 form.find('[name=lon]').val('');
1061                 form.find('[name=location_ns]').val('');
1062                 form.find('[name=location_id]').val('');
1063                 form.find('[name=notice_data-geo]').prop('checked', false);
1064
1065                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1066
1067                 if (error) {
1068                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1069                     form.find('.geo_status_wrapper .geo_status').text(error);
1070                 } else {
1071                     form.find('.geo_status_wrapper').remove();
1072                 }
1073             }
1074
1075             function getJSONgeocodeURL(geocodeURL, data) {
1076                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1077                 $.getJSON(geocodeURL, data, function (location) {
1078                     var lns, lid, NLN_text;
1079
1080                     if (location.location_ns !== undefined) {
1081                         form.find('[name=location_ns]').val(location.location_ns);
1082                         lns = location.location_ns;
1083                     }
1084
1085                     if (location.location_id !== undefined) {
1086                         form.find('[name=location_id]').val(location.location_id);
1087                         lid = location.location_id;
1088                     }
1089
1090                     if (location.name === undefined) {
1091                         NLN_text = data.lat + ';' + data.lon;
1092                     } else {
1093                         NLN_text = location.name;
1094                     }
1095
1096                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1097                     label
1098                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1099
1100                     form.find('[name=lat]').val(data.lat);
1101                     form.find('[name=lon]').val(data.lon);
1102                     form.find('[name=location_ns]').val(lns);
1103                     form.find('[name=location_id]').val(lid);
1104                     form.find('[name=notice_data-geo]').prop('checked', true);
1105
1106                     var cookieValue = {
1107                         NLat: data.lat,
1108                         NLon: data.lon,
1109                         NLNS: lns,
1110                         NLID: lid,
1111                         NLN: NLN_text,
1112                         NLNU: location.url,
1113                         NDG: true
1114                     };
1115
1116                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1117                 });
1118             }
1119
1120             if (check.length > 0) {
1121                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1122                     check.prop('checked', false);
1123                 } else {
1124                     check.prop('checked', true);
1125                 }
1126
1127                 var NGW = form.find('.notice_data-geo_wrap');
1128                 var geocodeURL = NGW.attr('data-api');
1129
1130                 label.attr('title', label.text());
1131
1132                 check.change(function () {
1133                     if (check.prop('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1134                         label
1135                             .attr('title', NoticeDataGeo_text.ShareDisable)
1136                             .addClass('checked');
1137
1138                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1139                             if (navigator.geolocation) {
1140                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1141                                 navigator.geolocation.getCurrentPosition(
1142                                     function (position) {
1143                                         form.find('[name=lat]').val(position.coords.latitude);
1144                                         form.find('[name=lon]').val(position.coords.longitude);
1145
1146                                         var data = {
1147                                             lat: position.coords.latitude,
1148                                             lon: position.coords.longitude,
1149                                             token: $('#token').val()
1150                                         };
1151
1152                                         getJSONgeocodeURL(geocodeURL, data);
1153                                     },
1154
1155                                     function (error) {
1156                                         switch(error.code) {
1157                                             case error.PERMISSION_DENIED:
1158                                                 removeNoticeDataGeo('Location permission denied.');
1159                                                 break;
1160                                             case error.TIMEOUT:
1161                                                 //$('#' + SN.C.S.NoticeDataGeo).prop('checked', false);
1162                                                 removeNoticeDataGeo('Location lookup timeout.');
1163                                                 break;
1164                                         }
1165                                     },
1166
1167                                     {
1168                                         timeout: 10000
1169                                     }
1170                                 );
1171                             } else {
1172                                 if (NLat.length > 0 && NLon.length > 0) {
1173                                     var data = {
1174                                         lat: NLat,
1175                                         lon: NLon,
1176                                         token: $('#token').val()
1177                                     };
1178
1179                                     getJSONgeocodeURL(geocodeURL, data);
1180                                 } else {
1181                                     removeNoticeDataGeo();
1182                                     check.remove();
1183                                     label.remove();
1184                                 }
1185                             }
1186                         } else {
1187                             try {
1188                                 var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1189
1190                                 form.find('[name=lat]').val(cookieValue.NLat);
1191                                 form.find('[name=lon]').val(cookieValue.NLon);
1192                                 form.find('[name=location_ns]').val(cookieValue.NLNS);
1193                                 form.find('[name=location_id]').val(cookieValue.NLID);
1194                                 form.find('[name=notice_data-geo]').prop('checked', cookieValue.NDG);
1195
1196                                SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1197                                 label
1198                                     .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1199                                     .addClass('checked');
1200                             } catch (e) {
1201                                 console.log('Parsing error:', e);
1202                             }
1203                         }
1204                     } else {
1205                         removeNoticeDataGeo();
1206                     }
1207                 }).change();
1208             }
1209         },
1210
1211         /**
1212          * Create or update a geolocation status widget in this notice posting form.
1213          *
1214          * @param {jQuery} form
1215          * @param {String} status
1216          * @param {String} lat (optional)
1217          * @param {String} lon (optional)
1218          * @param {String} url (optional)
1219          */
1220         NoticeGeoStatus: function (form, status, lat, lon, url)
1221         {
1222             var wrapper = form.find('.geo_status_wrapper');
1223             if (wrapper.length == 0) {
1224                 wrapper = $('<div class="' + SN.C.S.Success + ' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1225                 wrapper.find('button.close').click(function () {
1226                     form.find('[name=notice_data-geo]').prop('checked', false).change();
1227                     return false;
1228                 });
1229                 form.append(wrapper);
1230             }
1231             var label;
1232             if (url) {
1233                 label = $('<a></a>').attr('href', url);
1234             } else {
1235                 label = $('<span></span>');
1236             }
1237             label.text(status);
1238             if (lat || lon) {
1239                 var latlon = lat + ';' + lon;
1240                 label.attr('title', latlon);
1241                 if (!status) {
1242                     label.text(latlon)
1243                 }
1244             }
1245             wrapper.find('.geo_status').empty().append(label);
1246         },
1247
1248         /**
1249          * Setup function -- DOES NOT trigger actions immediately.
1250          *
1251          * Initializes event handlers for the "Send direct message" link on
1252          * profile pages, setting it up to display a dialog box when clicked.
1253          *
1254          * Unlike the repeat confirmation form, this appears to fetch
1255          * the form _from the original link target_, so the form itself
1256          * doesn't need to be in the current document.
1257          *
1258          * @fixme breaks ability to open link in new window?
1259          */
1260         NewDirectMessage: function () {
1261             NDM = $('.entity_send-a-message a');
1262             NDM.attr({'href': NDM.attr('href') + '&ajax=1'});
1263             NDM.on('click', function () {
1264                 var NDMF = $('.entity_send-a-message form');
1265                 if (NDMF.length === 0) {
1266                     $(this).addClass(SN.C.S.Processing);
1267                     $.get(NDM.attr('href'), null, function (data) {
1268                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1269                         NDMF = $('.entity_send-a-message .form_notice');
1270                         SN.U.FormNoticeXHR(NDMF);
1271                         SN.U.FormNoticeEnhancements(NDMF);
1272                         NDMF.append('<button class="close">&#215;</button>');
1273                         $('.entity_send-a-message button').click(function () {
1274                             NDMF.hide();
1275                             return false;
1276                         });
1277                         NDM.removeClass(SN.C.S.Processing);
1278                     });
1279                 } else {
1280                     NDMF.show();
1281                     $('.entity_send-a-message textarea').focus();
1282                 }
1283                 return false;
1284             });
1285         },
1286
1287         /**
1288          * Return a date object with the current local time on the
1289          * given year, month, and day.
1290          *
1291          * @param {number} year: 4-digit year
1292          * @param {number} month: 0 == January
1293          * @param {number} day: 1 == 1
1294          * @return {Date}
1295          */
1296         GetFullYear: function (year, month, day) {
1297             var date = new Date();
1298             date.setFullYear(year, month, day);
1299
1300             return date;
1301         },
1302
1303         /**
1304          * Some sort of object interface for storing some structured
1305          * information in a cookie.
1306          *
1307          * Appears to be used to save the last-used login nickname?
1308          * That's something that browsers usually take care of for us
1309          * these days, do we really need to do it? Does anything else
1310          * use this interface?
1311          *
1312          * @fixme what is this?
1313          * @fixme should this use non-cookie local storage when available?
1314          */
1315         StatusNetInstance: {
1316             /**
1317              * @fixme what is this?
1318              */
1319             Set: function (value) {
1320                 var SNI = SN.U.StatusNetInstance.Get();
1321                 if (SNI !== null) {
1322                     value = $.extend(SNI, value);
1323                 }
1324
1325                 $.cookie(
1326                     SN.C.S.StatusNetInstance,
1327                     JSON.stringify(value),
1328                     {
1329                         path: '/',
1330                         expires: SN.U.GetFullYear(2029, 0, 1)
1331                     });
1332             },
1333
1334             /**
1335              * @fixme what is this?
1336              */
1337             Get: function () {
1338                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1339                 if (cookieValue !== undefined) {
1340                     return JSON.parse(cookieValue);
1341                 }
1342                 return null;
1343             },
1344
1345             /**
1346              * @fixme what is this?
1347              */
1348             Delete: function () {
1349                 $.cookie(SN.C.S.StatusNetInstance, null);
1350             }
1351         },
1352
1353         /**
1354          * Check if the current page is a timeline where the current user's
1355          * posts should be displayed immediately on success.
1356          *
1357          * @fixme this should be done in a saner way, with machine-readable
1358          * info about what page we're looking at.
1359          *
1360          * @param {DOMElement} notice: HTML chunk with formatted notice
1361          * @return boolean
1362          */
1363         belongsOnTimeline: function (notice) {
1364             var action = $("body").attr('id');
1365             if (action == 'public') {
1366                 return true;
1367             }
1368
1369             var profileLink = $('#nav_profile a').attr('href');
1370             if (profileLink) {
1371                 var authorUrl = $(notice).find('.h-card.p-author').attr('href');
1372                 if (authorUrl == profileLink) {
1373                     if (action == 'all' || action == 'showstream') {
1374                         // Posts always show on your own friends and profile streams.
1375                         return true;
1376                     }
1377                 }
1378             }
1379
1380             // @fixme tag, group, reply timelines should be feasible as well.
1381             // Mismatch between id-based and name-based user/group links currently complicates
1382             // the lookup, since all our inline mentions contain the absolute links but the
1383             // UI links currently on the page use malleable names.
1384
1385             return false;
1386         },
1387
1388         /**
1389          * Switch to another active input sub-form.
1390          * This will hide the current form (if any), show the new one, and
1391          * update the input type tab selection state.
1392          *
1393          * @param {String} tag
1394          */
1395         switchInputFormTab: function (tag, setFocus) {
1396             if (typeof setFocus === 'undefined') { setFocus = true; }
1397             // The one that's current isn't current anymore
1398             $('.input_form_nav_tab.current').removeClass('current');
1399             if (tag != null) {
1400                 $('#input_form_nav_' + tag).addClass('current');
1401             }
1402
1403             // Don't remove 'current' if we also have the "nonav" class.
1404             // An example would be the message input form. removing
1405             // 'current' will cause the form to vanish from the page.
1406             var nonav = $('.input_form.current.nonav');
1407             if (nonav.length > 0) {
1408                 return;
1409             }
1410
1411             $('.input_form.current').removeClass('current');
1412             if (tag == null) {
1413                 // we're done here, no new inputform to focus on
1414                 return false;
1415             }
1416
1417             var noticeForm = $('#input_form_' + tag)
1418                     .addClass('current')
1419                     .find('.ajax-notice').each(function () {
1420                         var form = $(this);
1421                         SN.Init.NoticeFormSetup(form);
1422                     });
1423             if (setFocus) {
1424                 noticeForm.find('.notice_data-text').focus();
1425             }
1426
1427             return false;
1428         },
1429
1430         showMoreMenuItems: function (menuid) {
1431             $('#' + menuid + ' .more_link').remove();
1432             var selector = '#' + menuid + ' .extended_menu';
1433             var extended = $(selector);
1434             extended.removeClass('extended_menu');
1435             return void(0);
1436         }
1437     },
1438
1439     Init: {
1440         /**
1441          * If user is logged in, run setup code for the new notice form:
1442          *
1443          *  - char counter
1444          *  - AJAX submission
1445          *  - location events
1446          *  - file upload events
1447          */
1448         NoticeForm: function () {
1449             if ($('body.user_in').length > 0) {
1450                 // SN.Init.NoticeFormSetup() will get run
1451                 // when forms get displayed for the first time...
1452
1453                 // Initialize the input form field
1454                 $('#input_form_nav .input_form_nav_tab.current').each(function () {
1455                     current_tab_id = $(this).attr('id').substring('input_form_nav_'.length);
1456                     SN.U.switchInputFormTab(current_tab_id, false);
1457                 });
1458
1459                 // Make inline reply forms self-close when clicking out.
1460                 $('body').on('click', function (e) {
1461                     var openReplies = $('li.notice-reply');
1462                     if (openReplies.length > 0) {
1463                         var target = $(e.target);
1464                         openReplies.each(function () {
1465                             // Did we click outside this one?
1466                             var replyItem = $(this);
1467                             if (replyItem.has(e.target).length == 0) {
1468                                 var textarea = replyItem.find('.notice_data-text:first');
1469                                 var cur = $.trim(textarea.val());
1470                                 // Only close if there's been no edit.
1471                                 if (cur == '' || cur == textarea.data('initialText')) {
1472                                     var parentNotice = replyItem.closest('li.notice');
1473                                     replyItem.hide();
1474                                     parentNotice.find('li.notice-reply-placeholder').show();
1475                                 }
1476                             }
1477                         });
1478                     }
1479                 });
1480             }
1481         },
1482
1483         /**
1484          * Encapsulate notice form setup for a single form.
1485          * Plugins can add extra setup by monkeypatching this
1486          * function.
1487          *
1488          * @param {jQuery} form
1489          */
1490         NoticeFormSetup: function (form) {
1491             if (form.data('NoticeFormSetup')) {
1492                 return false;
1493             }
1494             SN.U.NoticeLocationAttach(form);
1495             SN.U.FormNoticeUniqueID(form);
1496             SN.U.FormNoticeXHR(form);
1497             SN.U.FormNoticeEnhancements(form);
1498             SN.U.NoticeDataAttach(form);
1499             form.data('NoticeFormSetup', true);
1500         },
1501
1502         /**
1503          * Run setup code for notice timeline views items:
1504          *
1505          * - AJAX submission for fave/repeat/reply (if logged in)
1506          * - Attachment link extras ('more' links)
1507          */
1508         Notices: function () {
1509             if ($('body.user_in').length > 0) {
1510                 SN.U.NoticeRepeat();
1511                 SN.U.NoticeReply();
1512                 SN.U.NoticeInlineReplySetup();
1513                 SN.U.NoticeOptionsAjax();
1514             }
1515
1516             SN.U.NoticeAttachments();
1517         },
1518
1519         /**
1520          * Run setup code for user & group profile page header area if logged in:
1521          *
1522          * - AJAX submission for sub/unsub/join/leave/nudge
1523          * - AJAX form popup for direct-message
1524          */
1525         EntityActions: function () {
1526             if ($('body.user_in').length > 0) {
1527                 $(document).on('click', '.form_user_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1528                 $(document).on('click', '.form_user_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1529                 $(document).on('click', '.form_group_join', function () { SN.U.FormXHR($(this)); return false; });
1530                 $(document).on('click', '.form_group_leave', function () { SN.U.FormXHR($(this)); return false; });
1531                 $(document).on('click', '.form_user_nudge', function () { SN.U.FormXHR($(this)); return false; });
1532                 $(document).on('click', '.form_peopletag_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1533                 $(document).on('click', '.form_peopletag_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1534                 $(document).on('click', '.form_user_add_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1535                 $(document).on('click', '.form_user_remove_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1536
1537                 SN.U.NewDirectMessage();
1538             }
1539         },
1540
1541         ProfileSearch: function () {
1542             if ($('body.user_in').length > 0) {
1543                 $(document).on('click', '.form_peopletag_edit_user_search input.submit', function () {
1544                     SN.U.FormProfileSearchXHR($(this).parents('form')); return false;
1545                 });
1546             }
1547         },
1548
1549         /**
1550          * Run setup code for login form:
1551          *
1552          * - loads saved last-used-nickname from cookie
1553          * - sets event handler to save nickname to cookie on submit
1554          *
1555          * @fixme is this necessary? Browsers do their own form saving these days.
1556          */
1557         Login: function () {
1558             if (SN.U.StatusNetInstance.Get() !== null) {
1559                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1560                 if (nickname !== null) {
1561                     $('#form_login #nickname').val(nickname);
1562                 }
1563             }
1564
1565             $('#form_login').on('submit', function () {
1566                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1567                 return true;
1568             });
1569         },
1570
1571         /**
1572          * Run setup for the ajax people tags editor
1573          *
1574          * - show edit button
1575          * - set event handle for click on edit button
1576          *   - loads people tag autocompletion data if not already present
1577          *     or if it is stale.
1578          *
1579          */
1580         PeopleTags: function () {
1581             $('.user_profile_tags .editable').append($('<button class="peopletags_edit_button"/>'));
1582
1583             $(document).on('click', '.peopletags_edit_button', function () {
1584                 var form = $(this).parents('dd').eq(0).find('form');
1585                 // We can buy time from the above animation
1586
1587                 $.ajax({
1588                     url: _peopletagAC,
1589                     dataType: 'json',
1590                     data: {token: $('#token').val()},
1591                     ifModified: true,
1592                     success: function (data) {
1593                         // item.label is used to match
1594                         for (i=0; i < data.length; i++) {
1595                             data[i].label = data[i].tag;
1596                         }
1597
1598                         SN.C.PtagACData = data;
1599                     }
1600                 });
1601
1602                 $(this).parents('ul').eq(0).fadeOut(200, function () {form.fadeIn(200).find('input#tags')});
1603             });
1604
1605             $(document).on('click', '.user_profile_tags form .submit', function () {
1606                 SN.U.FormPeopletagsXHR($(this).parents('form')); return false;
1607             });
1608         },
1609
1610         /**
1611          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1612          */
1613         AjaxForms: function () {
1614             $(document).on('submit', 'form.ajax', function () {
1615                 SN.U.FormXHR($(this));
1616                 return false;
1617             });
1618             $(document).on('click', 'form.ajax input[type=submit]', function () {
1619                 // Some forms rely on knowing which submit button was clicked.
1620                 // Save a hidden input field which'll be picked up during AJAX
1621                 // submit...
1622                 var button = $(this);
1623                 var form = button.closest('form');
1624                 form.find('.hidden-submit-button').remove();
1625                 $('<input class="hidden-submit-button" type="hidden" />')
1626                     .attr('name', button.attr('name'))
1627                     .val(button.val())
1628                     .appendTo(form);
1629             });
1630         },
1631
1632         /**
1633          * Add logic to any file upload forms to handle file size limits,
1634          * on browsers that support basic FileAPI.
1635          */
1636         UploadForms: function () {
1637             $('input[type=file]').change(function (event) {
1638                 if (typeof this.files === "object" && this.files.length > 0) {
1639                     var size = 0;
1640                     for (var i = 0; i < this.files.length; i++) {
1641                         size += this.files[i].size;
1642                     }
1643
1644                     var max = SN.U.maxFileSize($(this.form));
1645                     if (max > 0 && size > max) {
1646                         var msg = 'File too large: maximum upload size is %d bytes.';
1647                         alert(msg.replace('%d', max));
1648
1649                         // Clear the files.
1650                         $(this).val('');
1651                         event.preventDefault();
1652                         return false;
1653                     }
1654                 }
1655             });
1656         },
1657
1658         CheckBoxes: function () {
1659             $("span[class='checkbox-wrapper']").addClass("unchecked");
1660             $(".checkbox-wrapper").click(function () {
1661                 if ($(this).children("input").prop("checked")) {
1662                     // uncheck
1663                     $(this).children("input").prop("checked", false);
1664                     $(this).removeClass("checked");
1665                     $(this).addClass("unchecked");
1666                     $(this).children("label").text("Private?");
1667                 } else {
1668                     // check
1669                     $(this).children("input").prop("checked", true);
1670                     $(this).removeClass("unchecked");
1671                     $(this).addClass("checked");
1672                     $(this).children("label").text("Private");
1673                 }
1674             });
1675         }
1676     }
1677 };
1678
1679 /**
1680  * Run initialization functions on DOM-ready.
1681  *
1682  * Note that if we're waiting on other scripts to load, this won't happen
1683  * until that's done. To load scripts asynchronously without delaying setup,
1684  * don't start them loading until after DOM-ready time!
1685  */
1686 $(function () {
1687     SN.Init.AjaxForms();
1688     SN.Init.UploadForms();
1689     SN.Init.CheckBoxes();
1690     if ($('.' + SN.C.S.FormNotice).length > 0) {
1691         SN.Init.NoticeForm();
1692     }
1693     if ($('#content .notices').length > 0) {
1694         SN.Init.Notices();
1695     }
1696     if ($('#content .entity_actions').length > 0) {
1697         SN.Init.EntityActions();
1698     }
1699     if ($('#form_login').length > 0) {
1700         SN.Init.Login();
1701     }
1702     if ($('#profile_search_results').length > 0) {
1703         SN.Init.ProfileSearch();
1704     }
1705     if ($('.user_profile_tags .editable').length > 0) {
1706         SN.Init.PeopleTags();
1707     }
1708 });
1709