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