js/util.js

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