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 reply buttons to
 582          * tweak the new-notice form with needed variables and focus it
 583          * when pushed.
 584          *
 585          * (This replaces the default reply button behavior to submit
 586          * directly to a form which comes back with a specialized page
 587          * with the form data prefilled.)
 588          *
 589          * @access private
 590          */
 591         NoticeReply: function () {
 592             $(document).on('click', '#content .notice_reply', function (e) {
 593                 e.preventDefault();
 594                 var notice = $(this).closest('li.notice');
 595                 SN.U.NoticeInlineReplyTrigger(notice);
 596                 return false;
 597             });
 598         },
 599
 600         /**
 601          * Stub -- kept for compat with plugins for now.
 602          * @access private
 603          */
 604         NoticeReplyTo: function (notice) {
 605         },
 606
 607         /**
 608          * Open up a notice's inline reply box.
 609          *
 610          * @param {jQuery} notice: jQuery object containing one notice
 611          * @param {String} initialText
 612          */
 613         NoticeInlineReplyTrigger: function (notice, initialText) {
 614             // Find the notice we're replying to...
 615             var id = $($('.notice_id', notice)[0]).text();
 616             var replyForm;
 617             var parentNotice = notice;
 618             var stripForm = true; // strip a couple things out of reply forms that are inline
 619
 620             var list = notice.closest('.notices');
 621             if (list.hasClass('threaded-replies')) {
 622                 // We're replying to a reply; use reply form on the end of this list.
 623             } else {
 624                 // We're replying to a parent notice; pull its threaded list
 625                 // and we'll add on the end of it. Will add the threaded list if needed.
 626                 var list = $('ul.threaded-replies', notice);
 627                 if (list.length == 0) {
 628                     list = $('<ul class="notices threaded-replies xoxo"></ul>');
 629                     notice.append(list);
 630                     list = notice.find('ul.threaded-replies');
 631                 }
 632             }
 633
 634             var nextStep = function () {
 635                 // Override...?
 636                 replyForm.find('input[name=inreplyto]').val(id);
 637                 if (stripForm) {
 638                     // Don't do this for old-school reply form, as they don't come back!
 639                     replyForm.find('#notice_to').prop('disabled', true).hide();
 640                     replyForm.find('#notice_private').prop('disabled', true).hide();
 641                     replyForm.find('label[for=notice_to]').hide();
 642                     replyForm.find('label[for=notice_private]').hide();
 643                 }
 644
 645                 // Set focus...
 646                 var text = replyForm.find('textarea');
 647                 if (text.length == 0) {
 648                     throw "No textarea";
 649                 }
 650                 var replyto = '';
 651                 if (initialText) {
 652                     replyto = initialText + ' ';
 653                 }
 654                 text.val(replyto + text.val().replace(new RegExp(replyto, 'i'), ''));
 655                 text.data('initialText', $.trim(initialText));
 656                 text.focus();
 657                 if (text[0].setSelectionRange) {
 658                     var len = text.val().length;
 659                     text[0].setSelectionRange(len, len);
 660                 }
 661             };
 662
 663             // Create the reply form entry at the end
 664             var replyItem = $('li.notice-reply', list);
 665             if (replyItem.length == 0) {
 666                 replyItem = $('<li class="notice-reply"></li>');
 667
 668                 // Fetch a fresh copy of the notice form over AJAX.
 669                 var url = $('#input_form_status > form').attr('action');
 670                 $.get(url, {ajax: 1, inreplyto: id}, function (data, textStatus, xhr) {
 671                     var formEl = document._importNode($('form', data)[0], true);
 672                     replyItem.append(formEl);
 673                     list.append(replyItem);
 674
 675                     replyForm = $(formEl);
 676                     SN.Init.NoticeFormSetup(replyForm);
 677                     nextStep();
 678                 });
 679             } else {
 680                 replyForm = replyItem.children('form');
 681                 if (SN.Init.NoticeFormSetup(replyForm)) {
 682                     nextStep();
 683                 }
 684                 replyItem.show();
 685                 replyItem.find('textarea').focus();
 686             }
 687         },
 688
 689         /**
 690          * Setup function -- DOES NOT apply immediately.
 691          *
 692          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 693          */
 694         NoticeInlineReplySetup: function () {
 695             // Expand conversation links
 696             $(document).on('click', 'li.notice-reply-comments a', function () {
 697                     var url = $(this).attr('href');
 698                     var area = $(this).closest('.threaded-replies');
 699                     $.get(url, {ajax: 1}, function (data, textStatus, xhr) {
 700                         var replies = $('.threaded-replies', data);
 701                         if (replies.length) {
 702                             area.replaceWith(document._importNode(replies[0], true));
 703                         }
 704                     });
 705                     return false;
 706                 });
 707         },
 708
 709         /**
 710          * Setup function -- DOES NOT trigger actions immediately.
 711          *
 712          * Sets up event handlers for repeat forms to toss up a confirmation
 713          * popout before submitting.
 714          *
 715          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 716          *
 717          */
 718         NoticeRepeat: function () {
 719             $('body').on('click', '.form_repeat', function (e) {
 720                 e.preventDefault();
 721
 722                 SN.U.NoticeRepeatConfirmation($(this));
 723                 return false;
 724             });
 725         },
 726
 727         /**
 728          * Shows a confirmation dialog box variant of the repeat button form.
 729          * This seems to use a technique where the repeat form contains
 730          * _both_ a standalone button _and_ text and buttons for a dialog.
 731          * The dialog will close after its copy of the form is submitted,
 732          * or if you click its 'close' button.
 733          *
 734          * The dialog is created by duplicating the original form and changing
 735          * its style; while clever, this is hard to generalize and probably
 736          * duplicates a lot of unnecessary HTML output.
 737          *
 738          * @fixme create confirmation dialogs through a generalized interface
 739          * that can be reused instead of hardcoded text and styles.
 740          *
 741          * @param {jQuery} form
 742          */
 743         NoticeRepeatConfirmation: function (form) {
 744             var submit_i = form.find('.submit');
 745
 746             var submit = submit_i.clone();
 747             submit
 748                 .addClass('submit_dialogbox')
 749                 .removeClass('submit');
 750             form.append(submit);
 751             submit.on('click', function () { SN.U.FormXHR(form); return false; });
 752
 753             submit_i.hide();
 754
 755             form
 756                 .addClass('dialogbox')
 757                 .append('<button class="close">&#215;</button>')
 758                 .closest('.notice-options')
 759                     .addClass('opaque');
 760
 761             form.find('button.close').click(function () {
 762                 $(this).remove();
 763
 764                 form
 765                     .removeClass('dialogbox')
 766                     .closest('.notice-options')
 767                         .removeClass('opaque');
 768
 769                 form.find('.submit_dialogbox').remove();
 770                 form.find('.submit').show();
 771
 772                 return false;
 773             });
 774         },
 775
 776         /**
 777          * Setup function -- DOES NOT trigger actions immediately.
 778          *
 779          * Goes through all notices currently displayed and sets up attachment
 780          * handling if needed.
 781          */
 782         NoticeAttachments: function () {
 783             $('.notice a.attachment').each(function () {
 784                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 785             });
 786         },
 787
 788         /**
 789          * Setup function -- DOES NOT trigger actions immediately.
 790          *
 791          * Sets up special attachment link handling if needed. Currently this
 792          * consists only of making the "more" button used for OStatus message
 793          * cropping turn into an auto-expansion button that loads the full
 794          * text from an attachment file.
 795          *
 796          * @param {jQuery} notice
 797          */
 798         NoticeWithAttachment: function (notice) {
 799             if (notice.find('.attachment').length === 0) {
 800                 return;
 801             }
 802
 803                         $(document).on('click','.attachment.more',function () {
 804                                 var m = $(this);
 805                                 m.addClass(SN.C.S.Processing);
 806                                 $.get(m.attr('href'), {ajax: 1}, function (data) {
 807                                         m.parent('.e-content').html($(data).find('#attachment_view .e-content').html());
 808                                 });
 809
 810                                 return false;
 811                         });
 812
 813         },
 814
 815         /**
 816          * Setup function -- DOES NOT trigger actions immediately.
 817          *
 818          * Sets up event handlers for the file-attachment widget in the
 819          * new notice form. When a file is selected, a box will be added
 820          * below the text input showing the filename and, if supported
 821          * by the browser, a thumbnail preview.
 822          *
 823          * This preview box will also allow removing the attachment
 824          * prior to posting.
 825          *
 826          * @param {jQuery} form
 827          */
 828         NoticeDataAttach: function (form) {
 829             var i;
 830             var NDA = form.find('input[type=file]');
 831             NDA.change(function (event) {
 832                 form.find('.attach-status').remove();
 833
 834                 var filename = $(this).val();
 835                 if (!filename) {
 836                     // No file -- we've been tricked!
 837                     return false;
 838                 }
 839
 840                 var attachStatus = $('<div class="attach-status ' + SN.C.S.Success + '"><code></code> <button class="close">&#215;</button></div>');
 841                 attachStatus.find('code').text(filename);
 842                 attachStatus.find('button').click(function () {
 843                     attachStatus.remove();
 844                     NDA.val('');
 845
 846                     return false;
 847                 });
 848                 form.append(attachStatus);
 849
 850                 if (typeof this.files === "object") {
 851                     // Some newer browsers will let us fetch the files for preview.
 852                     for (i = 0; i < this.files.length; i++) {
 853                         SN.U.PreviewAttach(form, this.files[i]);
 854                     }
 855                 }
 856             });
 857         },
 858
 859         /**
 860          * Get PHP's MAX_FILE_SIZE setting for this form;
 861          * used to apply client-side file size limit checks.
 862          *
 863          * @param {jQuery} form
 864          * @return int max size in bytes; 0 or negative means no limit
 865          */
 866         maxFileSize: function (form) {
 867             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 868             if (max) {
 869                 return parseInt(max);
 870             }
 871             return 0;
 872         },
 873
 874         /**
 875          * For browsers with FileAPI support: make a thumbnail if possible,
 876          * and append it into the attachment display widget.
 877          *
 878          * Known good:
 879          * - Firefox 3.6.6, 4.0b7
 880          * - Chrome 8.0.552.210
 881          *
 882          * Known ok metadata, can't get contents:
 883          * - Safari 5.0.2
 884          *
 885          * Known fail:
 886          * - Opera 10.63, 11 beta (no input.files interface)
 887          *
 888          * @param {jQuery} form
 889          * @param {File} file
 890          *
 891          * @todo use configured thumbnail size
 892          * @todo detect pixel size?
 893          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 894          */
 895         PreviewAttach: function (form, file) {
 896             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 897             var preview = true;
 898
 899             var blobAsDataURL;
 900             if (window.createObjectURL !== undefined) {
 901                 /**
 902                  * createObjectURL lets us reference the file directly from an <img>
 903                  * This produces a compact URL with an opaque reference to the file,
 904                  * which we can reference immediately.
 905                  *
 906                  * - Firefox 3.6.6: no
 907                  * - Firefox 4.0b7: no
 908                  * - Safari 5.0.2: no
 909                  * - Chrome 8.0.552.210: works!
 910                  */
 911                 blobAsDataURL = function (blob, callback) {
 912                     callback(window.createObjectURL(blob));
 913                 };
 914             } else if (window.FileReader !== undefined) {
 915                 /**
 916                  * FileAPI's FileReader can build a data URL from a blob's contents,
 917                  * but it must read the file and build it asynchronously. This means
 918                  * we'll be passing a giant data URL around, which may be inefficient.
 919                  *
 920                  * - Firefox 3.6.6: works!
 921                  * - Firefox 4.0b7: works!
 922                  * - Safari 5.0.2: no
 923                  * - Chrome 8.0.552.210: works!
 924                  */
 925                 blobAsDataURL = function (blob, callback) {
 926                     var reader = new FileReader();
 927                     reader.onload = function (event) {
 928                         callback(reader.result);
 929                     };
 930                     reader.readAsDataURL(blob);
 931                 };
 932             } else {
 933                 preview = false;
 934             }
 935
 936             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 937             if ($.inArray(file.type, imageTypes) == -1) {
 938                 // We probably don't know how to show the file.
 939                 preview = false;
 940             }
 941
 942             var maxSize = 8 * 1024 * 1024;
 943             if (file.size > maxSize) {
 944                 // Don't kill the browser trying to load some giant image.
 945                 preview = false;
 946             }
 947
 948             if (preview) {
 949                 blobAsDataURL(file, function (url) {
 950                     var img = $('<img>')
 951                         .attr('title', tooltip)
 952                         .attr('alt', tooltip)
 953                         .attr('src', url)
 954                         .attr('style', 'height: 120px');
 955                     form.find('.attach-status').append(img);
 956                 });
 957             } else {
 958                 var img = $('<div></div>').text(tooltip);
 959                 form.find('.attach-status').append(img);
 960             }
 961         },
 962
 963         /**
 964          * Setup function -- DOES NOT trigger actions immediately.
 965          *
 966          * Initializes state for the location-lookup features in the
 967          * new-notice form. Seems to set up some event handlers for
 968          * triggering lookups and using the new values.
 969          *
 970          * @param {jQuery} form
 971          *
 972          * @fixme tl;dr
 973          * @fixme there's not good visual state update here, so users have a
 974          *        hard time figuring out if it's working or fixing if it's wrong.
 975          *
 976          */
 977         NoticeLocationAttach: function (form) {
 978             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
 979             var NLat = form.find('[name=lat]');
 980             var NLon = form.find('[name=lon]');
 981             var NLNS = form.find('[name=location_ns]').val();
 982             var NLID = form.find('[name=location_id]').val();
 983             var NLN = ''; // @fixme
 984             var NDGe = form.find('[name=notice_data-geo]');
 985             var check = form.find('[name=notice_data-geo]');
 986             var label = form.find('label.notice_data-geo');
 987
 988             function removeNoticeDataGeo(error) {
 989                 label
 990                     .attr('title', $.trim(label.text()))
 991                     .removeClass('checked');
 992
 993                 form.find('[name=lat]').val('');
 994                 form.find('[name=lon]').val('');
 995                 form.find('[name=location_ns]').val('');
 996                 form.find('[name=location_id]').val('');
 997                 form.find('[name=notice_data-geo]').prop('checked', false);
 998
 999                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1000
1001                 if (error) {
1002                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1003                     form.find('.geo_status_wrapper .geo_status').text(error);
1004                 } else {
1005                     form.find('.geo_status_wrapper').remove();
1006                 }
1007             }
1008
1009             function getJSONgeocodeURL(geocodeURL, data) {
1010                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1011                 $.getJSON(geocodeURL, data, function (location) {
1012                     var lns, lid, NLN_text;
1013
1014                     if (location.location_ns !== undefined) {
1015                         form.find('[name=location_ns]').val(location.location_ns);
1016                         lns = location.location_ns;
1017                     }
1018
1019                     if (location.location_id !== undefined) {
1020                         form.find('[name=location_id]').val(location.location_id);
1021                         lid = location.location_id;
1022                     }
1023
1024                     if (location.name === undefined) {
1025                         NLN_text = data.lat + ';' + data.lon;
1026                     } else {
1027                         NLN_text = location.name;
1028                     }
1029
1030                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1031                     label
1032                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1033
1034                     form.find('[name=lat]').val(data.lat);
1035                     form.find('[name=lon]').val(data.lon);
1036                     form.find('[name=location_ns]').val(lns);
1037                     form.find('[name=location_id]').val(lid);
1038                     form.find('[name=notice_data-geo]').prop('checked', true);
1039
1040                     var cookieValue = {
1041                         NLat: data.lat,
1042                         NLon: data.lon,
1043                         NLNS: lns,
1044                         NLID: lid,
1045                         NLN: NLN_text,
1046                         NLNU: location.url,
1047                         NDG: true
1048                     };
1049
1050                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1051                 });
1052             }
1053
1054             if (check.length > 0) {
1055                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1056                     check.prop('checked', false);
1057                 } else {
1058                     check.prop('checked', true);
1059                 }
1060
1061                 var NGW = form.find('.notice_data-geo_wrap');
1062                 var geocodeURL = NGW.attr('data-api');
1063
1064                 label.attr('title', label.text());
1065
1066                 check.change(function () {
1067                     if (check.prop('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1068                         label
1069                             .attr('title', NoticeDataGeo_text.ShareDisable)
1070                             .addClass('checked');
1071
1072                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1073                             if (navigator.geolocation) {
1074                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1075                                 navigator.geolocation.getCurrentPosition(
1076                                     function (position) {
1077                                         form.find('[name=lat]').val(position.coords.latitude);
1078                                         form.find('[name=lon]').val(position.coords.longitude);
1079
1080                                         var data = {
1081                                             lat: position.coords.latitude,
1082                                             lon: position.coords.longitude,
1083                                             token: $('#token').val()
1084                                         };
1085
1086                                         getJSONgeocodeURL(geocodeURL, data);
1087                                     },
1088
1089                                     function (error) {
1090                                         switch(error.code) {
1091                                             case error.PERMISSION_DENIED:
1092                                                 removeNoticeDataGeo('Location permission denied.');
1093                                                 break;
1094                                             case error.TIMEOUT:
1095                                                 //$('#' + SN.C.S.NoticeDataGeo).prop('checked', false);
1096                                                 removeNoticeDataGeo('Location lookup timeout.');
1097                                                 break;
1098                                         }
1099                                     },
1100
1101                                     {
1102                                         timeout: 10000
1103                                     }
1104                                 );
1105                             } else {
1106                                 if (NLat.length > 0 && NLon.length > 0) {
1107                                     var data = {
1108                                         lat: NLat,
1109                                         lon: NLon,
1110                                         token: $('#token').val()
1111                                     };
1112
1113                                     getJSONgeocodeURL(geocodeURL, data);
1114                                 } else {
1115                                     removeNoticeDataGeo();
1116                                     check.remove();
1117                                     label.remove();
1118                                 }
1119                             }
1120                         } else {
1121                             try {
1122                                 var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1123
1124                                 form.find('[name=lat]').val(cookieValue.NLat);
1125                                 form.find('[name=lon]').val(cookieValue.NLon);
1126                                 form.find('[name=location_ns]').val(cookieValue.NLNS);
1127                                 form.find('[name=location_id]').val(cookieValue.NLID);
1128                                 form.find('[name=notice_data-geo]').prop('checked', cookieValue.NDG);
1129
1130                                SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1131                                 label
1132                                     .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1133                                     .addClass('checked');
1134                             } catch (e) {
1135                                 console.log('Parsing error:', e);
1136                             }
1137                         }
1138                     } else {
1139                         removeNoticeDataGeo();
1140                     }
1141                 }).change();
1142             }
1143         },
1144
1145         /**
1146          * Create or update a geolocation status widget in this notice posting form.
1147          *
1148          * @param {jQuery} form
1149          * @param {String} status
1150          * @param {String} lat (optional)
1151          * @param {String} lon (optional)
1152          * @param {String} url (optional)
1153          */
1154         NoticeGeoStatus: function (form, status, lat, lon, url)
1155         {
1156             var wrapper = form.find('.geo_status_wrapper');
1157             if (wrapper.length == 0) {
1158                 wrapper = $('<div class="' + SN.C.S.Success + ' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1159                 wrapper.find('button.close').click(function () {
1160                     form.find('[name=notice_data-geo]').prop('checked', false).change();
1161                     return false;
1162                 });
1163                 form.append(wrapper);
1164             }
1165             var label;
1166             if (url) {
1167                 label = $('<a></a>').attr('href', url);
1168             } else {
1169                 label = $('<span></span>');
1170             }
1171             label.text(status);
1172             if (lat || lon) {
1173                 var latlon = lat + ';' + lon;
1174                 label.attr('title', latlon);
1175                 if (!status) {
1176                     label.text(latlon)
1177                 }
1178             }
1179             wrapper.find('.geo_status').empty().append(label);
1180         },
1181
1182         /**
1183          * Setup function -- DOES NOT trigger actions immediately.
1184          *
1185          * Initializes event handlers for the "Send direct message" link on
1186          * profile pages, setting it up to display a dialog box when clicked.
1187          *
1188          * Unlike the repeat confirmation form, this appears to fetch
1189          * the form _from the original link target_, so the form itself
1190          * doesn't need to be in the current document.
1191          *
1192          * @fixme breaks ability to open link in new window?
1193          */
1194         NewDirectMessage: function () {
1195             NDM = $('.entity_send-a-message a');
1196             NDM.attr({'href': NDM.attr('href') + '&ajax=1'});
1197             NDM.on('click', function () {
1198                 var NDMF = $('.entity_send-a-message form');
1199                 if (NDMF.length === 0) {
1200                     $(this).addClass(SN.C.S.Processing);
1201                     $.get(NDM.attr('href'), null, function (data) {
1202                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1203                         NDMF = $('.entity_send-a-message .form_notice');
1204                         SN.U.FormNoticeXHR(NDMF);
1205                         SN.U.FormNoticeEnhancements(NDMF);
1206                         NDMF.append('<button class="close">&#215;</button>');
1207                         $('.entity_send-a-message button').click(function () {
1208                             NDMF.hide();
1209                             return false;
1210                         });
1211                         NDM.removeClass(SN.C.S.Processing);
1212                     });
1213                 } else {
1214                     NDMF.show();
1215                     $('.entity_send-a-message textarea').focus();
1216                 }
1217                 return false;
1218             });
1219         },
1220
1221         /**
1222          * Return a date object with the current local time on the
1223          * given year, month, and day.
1224          *
1225          * @param {number} year: 4-digit year
1226          * @param {number} month: 0 == January
1227          * @param {number} day: 1 == 1
1228          * @return {Date}
1229          */
1230         GetFullYear: function (year, month, day) {
1231             var date = new Date();
1232             date.setFullYear(year, month, day);
1233
1234             return date;
1235         },
1236
1237         /**
1238          * Some sort of object interface for storing some structured
1239          * information in a cookie.
1240          *
1241          * Appears to be used to save the last-used login nickname?
1242          * That's something that browsers usually take care of for us
1243          * these days, do we really need to do it? Does anything else
1244          * use this interface?
1245          *
1246          * @fixme what is this?
1247          * @fixme should this use non-cookie local storage when available?
1248          */
1249         StatusNetInstance: {
1250             /**
1251              * @fixme what is this?
1252              */
1253             Set: function (value) {
1254                 var SNI = SN.U.StatusNetInstance.Get();
1255                 if (SNI !== null) {
1256                     value = $.extend(SNI, value);
1257                 }
1258
1259                 $.cookie(
1260                     SN.C.S.StatusNetInstance,
1261                     JSON.stringify(value),
1262                     {
1263                         path: '/',
1264                         expires: SN.U.GetFullYear(2029, 0, 1)
1265                     });
1266             },
1267
1268             /**
1269              * @fixme what is this?
1270              */
1271             Get: function () {
1272                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1273                 if (cookieValue !== undefined) {
1274                     return JSON.parse(cookieValue);
1275                 }
1276                 return null;
1277             },
1278
1279             /**
1280              * @fixme what is this?
1281              */
1282             Delete: function () {
1283                 $.cookie(SN.C.S.StatusNetInstance, null);
1284             }
1285         },
1286
1287         /**
1288          * Check if the current page is a timeline where the current user's
1289          * posts should be displayed immediately on success.
1290          *
1291          * @fixme this should be done in a saner way, with machine-readable
1292          * info about what page we're looking at.
1293          *
1294          * @param {DOMElement} notice: HTML chunk with formatted notice
1295          * @return boolean
1296          */
1297         belongsOnTimeline: function (notice) {
1298             var action = $("body").attr('id');
1299             if (action == 'public') {
1300                 return true;
1301             }
1302
1303             var profileLink = $('#nav_profile a').attr('href');
1304             if (profileLink) {
1305                 var authorUrl = $(notice).find('.h-card.p-author').attr('href');
1306                 if (authorUrl == profileLink) {
1307                     if (action == 'all' || action == 'showstream') {
1308                         // Posts always show on your own friends and profile streams.
1309                         return true;
1310                     }
1311                 }
1312             }
1313
1314             // @fixme tag, group, reply timelines should be feasible as well.
1315             // Mismatch between id-based and name-based user/group links currently complicates
1316             // the lookup, since all our inline mentions contain the absolute links but the
1317             // UI links currently on the page use malleable names.
1318
1319             return false;
1320         },
1321
1322         /**
1323          * Switch to another active input sub-form.
1324          * This will hide the current form (if any), show the new one, and
1325          * update the input type tab selection state.
1326          *
1327          * @param {String} tag
1328          */
1329         switchInputFormTab: function (tag, setFocus) {
1330             if (typeof setFocus === 'undefined') { setFocus = true; }
1331             // The one that's current isn't current anymore
1332             $('.input_form_nav_tab.current').removeClass('current');
1333             if (tag != null) {
1334                 $('#input_form_nav_' + tag).addClass('current');
1335             }
1336
1337             // Don't remove 'current' if we also have the "nonav" class.
1338             // An example would be the message input form. removing
1339             // 'current' will cause the form to vanish from the page.
1340             var nonav = $('.input_form.current.nonav');
1341             if (nonav.length > 0) {
1342                 return;
1343             }
1344
1345             $('.input_form.current').removeClass('current');
1346             if (tag == null) {
1347                 // we're done here, no new inputform to focus on
1348                 return false;
1349             }
1350
1351             var noticeForm = $('#input_form_' + tag)
1352                     .addClass('current')
1353                     .find('.ajax-notice').each(function () {
1354                         var form = $(this);
1355                         SN.Init.NoticeFormSetup(form);
1356                     });
1357             if (setFocus) {
1358                 noticeForm.find('.notice_data-text').focus();
1359             }
1360
1361             return false;
1362         },
1363
1364         showMoreMenuItems: function (menuid) {
1365             $('#' + menuid + ' .more_link').remove();
1366             var selector = '#' + menuid + ' .extended_menu';
1367             var extended = $(selector);
1368             extended.removeClass('extended_menu');
1369             return void(0);
1370         }
1371     },
1372
1373     Init: {
1374         /**
1375          * If user is logged in, run setup code for the new notice form:
1376          *
1377          *  - char counter
1378          *  - AJAX submission
1379          *  - location events
1380          *  - file upload events
1381          */
1382         NoticeForm: function () {
1383             if ($('body.user_in').length > 0) {
1384                 // SN.Init.NoticeFormSetup() will get run
1385                 // when forms get displayed for the first time...
1386
1387                 // Initialize the input form field
1388                 $('#input_form_nav .input_form_nav_tab.current').each(function () {
1389                     current_tab_id = $(this).attr('id').substring('input_form_nav_'.length);
1390                     SN.U.switchInputFormTab(current_tab_id, false);
1391                 });
1392
1393                 // Make inline reply forms self-close when clicking out.
1394                 $('body').on('click', function (e) {
1395                     var openReplies = $('li.notice-reply');
1396                     if (openReplies.length > 0) {
1397                         var target = $(e.target);
1398                         openReplies.each(function () {
1399                             // Did we click outside this one?
1400                             var replyItem = $(this);
1401                             if (replyItem.has(e.target).length == 0) {
1402                                 var textarea = replyItem.find('.notice_data-text:first');
1403                                 var cur = $.trim(textarea.val());
1404                                 // Only close if there's been no edit.
1405                                 if (cur == '' || cur == textarea.data('initialText')) {
1406                                     var parentNotice = replyItem.closest('li.notice');
1407                                     replyItem.hide();
1408                                     parentNotice.find('li.notice-reply-placeholder').show();
1409                                 }
1410                             }
1411                         });
1412                     }
1413                 });
1414
1415                 // Infield labels for notice form inputs.
1416                 $('.input_forms fieldset fieldset label').inFieldLabels({ fadeOpacity:0 });
1417             }
1418         },
1419
1420         /**
1421          * Encapsulate notice form setup for a single form.
1422          * Plugins can add extra setup by monkeypatching this
1423          * function.
1424          *
1425          * @param {jQuery} form
1426          */
1427         NoticeFormSetup: function (form) {
1428             if (form.data('NoticeFormSetup')) {
1429                 return false;
1430             }
1431             SN.U.NoticeLocationAttach(form);
1432             SN.U.FormNoticeXHR(form);
1433             SN.U.FormNoticeEnhancements(form);
1434             SN.U.NoticeDataAttach(form);
1435             form.data('NoticeFormSetup', true);
1436         },
1437
1438         /**
1439          * Run setup code for notice timeline views items:
1440          *
1441          * - AJAX submission for fave/repeat/reply (if logged in)
1442          * - Attachment link extras ('more' links)
1443          */
1444         Notices: function () {
1445             if ($('body.user_in').length > 0) {
1446                 SN.U.NoticeRepeat();
1447                 SN.U.NoticeReply();
1448                 SN.U.NoticeInlineReplySetup();
1449             }
1450
1451             SN.U.NoticeAttachments();
1452         },
1453
1454         /**
1455          * Run setup code for user & group profile page header area if logged in:
1456          *
1457          * - AJAX submission for sub/unsub/join/leave/nudge
1458          * - AJAX form popup for direct-message
1459          */
1460         EntityActions: function () {
1461             if ($('body.user_in').length > 0) {
1462                 $(document).on('click', '.form_user_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1463                 $(document).on('click', '.form_user_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1464                 $(document).on('click', '.form_group_join', function () { SN.U.FormXHR($(this)); return false; });
1465                 $(document).on('click', '.form_group_leave', function () { SN.U.FormXHR($(this)); return false; });
1466                 $(document).on('click', '.form_user_nudge', function () { SN.U.FormXHR($(this)); return false; });
1467                 $(document).on('click', '.form_peopletag_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1468                 $(document).on('click', '.form_peopletag_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1469                 $(document).on('click', '.form_user_add_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1470                 $(document).on('click', '.form_user_remove_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1471
1472                 SN.U.NewDirectMessage();
1473             }
1474         },
1475
1476         ProfileSearch: function () {
1477             if ($('body.user_in').length > 0) {
1478                 $(document).on('click', '.form_peopletag_edit_user_search input.submit', function () {
1479                     SN.U.FormProfileSearchXHR($(this).parents('form')); return false;
1480                 });
1481             }
1482         },
1483
1484         /**
1485          * Run setup code for login form:
1486          *
1487          * - loads saved last-used-nickname from cookie
1488          * - sets event handler to save nickname to cookie on submit
1489          *
1490          * @fixme is this necessary? Browsers do their own form saving these days.
1491          */
1492         Login: function () {
1493             if (SN.U.StatusNetInstance.Get() !== null) {
1494                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1495                 if (nickname !== null) {
1496                     $('#form_login #nickname').val(nickname);
1497                 }
1498             }
1499
1500             $('#form_login').on('submit', function () {
1501                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1502                 return true;
1503             });
1504         },
1505
1506         /**
1507          * Run setup for the ajax people tags editor
1508          *
1509          * - show edit button
1510          * - set event handle for click on edit button
1511          *   - loads people tag autocompletion data if not already present
1512          *     or if it is stale.
1513          *
1514          */
1515         PeopleTags: function () {
1516             $('.user_profile_tags .editable').append($('<button class="peopletags_edit_button"/>'));
1517
1518             $(document).on('click', '.peopletags_edit_button', function () {
1519                 var form = $(this).parents('dd').eq(0).find('form');
1520                 // We can buy time from the above animation
1521
1522                 $.ajax({
1523                     url: _peopletagAC,
1524                     dataType: 'json',
1525                     data: {token: $('#token').val()},
1526                     ifModified: true,
1527                     success: function (data) {
1528                         // item.label is used to match
1529                         for (i=0; i < data.length; i++) {
1530                             data[i].label = data[i].tag;
1531                         }
1532
1533                         SN.C.PtagACData = data;
1534                     }
1535                 });
1536
1537                 $(this).parents('ul').eq(0).fadeOut(200, function () {form.fadeIn(200).find('input#tags')});
1538             });
1539
1540             $(document).on('click', '.user_profile_tags form .submit', function () {
1541                 SN.U.FormPeopletagsXHR($(this).parents('form')); return false;
1542             });
1543         },
1544
1545         /**
1546          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1547          */
1548         AjaxForms: function () {
1549             $(document).on('submit', 'form.ajax', function () {
1550                 SN.U.FormXHR($(this));
1551                 return false;
1552             });
1553             $(document).on('click', 'form.ajax input[type=submit]', function () {
1554                 // Some forms rely on knowing which submit button was clicked.
1555                 // Save a hidden input field which'll be picked up during AJAX
1556                 // submit...
1557                 var button = $(this);
1558                 var form = button.closest('form');
1559                 form.find('.hidden-submit-button').remove();
1560                 $('<input class="hidden-submit-button" type="hidden" />')
1561                     .attr('name', button.attr('name'))
1562                     .val(button.val())
1563                     .appendTo(form);
1564             });
1565         },
1566
1567         /**
1568          * Add logic to any file upload forms to handle file size limits,
1569          * on browsers that support basic FileAPI.
1570          */
1571         UploadForms: function () {
1572             $('input[type=file]').change(function (event) {
1573                 if (typeof this.files === "object" && this.files.length > 0) {
1574                     var size = 0;
1575                     for (var i = 0; i < this.files.length; i++) {
1576                         size += this.files[i].size;
1577                     }
1578
1579                     var max = SN.U.maxFileSize($(this.form));
1580                     if (max > 0 && size > max) {
1581                         var msg = 'File too large: maximum upload size is %d bytes.';
1582                         alert(msg.replace('%d', max));
1583
1584                         // Clear the files.
1585                         $(this).val('');
1586                         event.preventDefault();
1587                         return false;
1588                     }
1589                 }
1590             });
1591         },
1592
1593         CheckBoxes: function () {
1594             $("span[class='checkbox-wrapper']").addClass("unchecked");
1595             $(".checkbox-wrapper").click(function () {
1596                 if ($(this).children("input").prop("checked")) {
1597                     // uncheck
1598                     $(this).children("input").prop("checked", false);
1599                     $(this).removeClass("checked");
1600                     $(this).addClass("unchecked");
1601                     $(this).children("label").text("Private?");
1602                 } else {
1603                     // check
1604                     $(this).children("input").prop("checked", true);
1605                     $(this).removeClass("unchecked");
1606                     $(this).addClass("checked");
1607                     $(this).children("label").text("Private");
1608                 }
1609             });
1610         }
1611     }
1612 };
1613
1614 /**
1615  * Run initialization functions on DOM-ready.
1616  *
1617  * Note that if we're waiting on other scripts to load, this won't happen
1618  * until that's done. To load scripts asynchronously without delaying setup,
1619  * don't start them loading until after DOM-ready time!
1620  */
1621 $(function () {
1622     SN.Init.AjaxForms();
1623     SN.Init.UploadForms();
1624     SN.Init.CheckBoxes();
1625     if ($('.' + SN.C.S.FormNotice).length > 0) {
1626         SN.Init.NoticeForm();
1627     }
1628     if ($('#content .notices').length > 0) {
1629         SN.Init.Notices();
1630     }
1631     if ($('#content .entity_actions').length > 0) {
1632         SN.Init.EntityActions();
1633     }
1634     if ($('#form_login').length > 0) {
1635         SN.Init.Login();
1636     }
1637     if ($('#profile_search_results').length > 0) {
1638         SN.Init.ProfileSearch();
1639     }
1640     if ($('.user_profile_tags .editable').length > 0) {
1641         SN.Init.PeopleTags();
1642     }
1643 });
1644