js/util.js

   1 /*
   2  * StatusNet - a distributed open-source microblogging tool
   3  * Copyright (C) 2008, StatusNet, Inc.
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU Affero General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU Affero General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Affero General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * @category  UI interaction
  19  * @package   StatusNet
  20  * @author    Sarven Capadisli <csarven@status.net>
  21  * @author    Evan Prodromou <evan@status.net>
  22  * @author    Brion Vibber <brion@status.net>
  23  * @copyright 2009,2010 StatusNet, Inc.
  24  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  25  * @link      http://status.net/
  26  */
  27
  28 var SN = { // StatusNet
  29     C: { // Config
  30         I: { // Init
  31             CounterBlackout: false,
  32             MaxLength: 140,
  33             PatternUsername: /^[0-9a-zA-Z\-_.]*$/,
  34             HTTP20x30x: [200, 201, 202, 203, 204, 205, 206, 300, 301, 302, 303, 304, 305, 306, 307],
  35         },
  36
  37         /**
  38          * @fixme are these worth the trouble? They seem to mostly just duplicate
  39          * themselves while slightly obscuring the actual selector, so it's hard
  40          * to pop over to the HTML and find something.
  41          *
  42          * In theory, minification could reduce them to shorter variable names,
  43          * but at present that doesn't happen with yui-compressor.
  44          */
  45         S: { // Selector
  46             Disabled: 'disabled',
  47             Warning: 'warning',
  48             Error: 'error',
  49             Success: 'success',
  50             Processing: 'processing',
  51             CommandResult: 'command_result',
  52             FormNotice: 'form_notice',
  53             NoticeDataGeo: 'notice_data-geo',
  54             NoticeDataGeoCookie: 'NoticeDataGeo',
  55             NoticeDataGeoSelected: 'notice_data-geo_selected',
  56         }
  57     },
  58
  59     V: {    // Variables
  60         // These get set on runtime via inline scripting, so don't put anything here.
  61     },
  62
  63     /**
  64      * list of callbacks, categorized into _callbacks['event_name'] = [ callback_function_1, callback_function_2 ]
  65      *
  66      * @access private
  67      */
  68     _callbacks: {},
  69
  70     /**
  71      * Map of localized message strings exported to script from the PHP
  72      * side via Action::getScriptMessages().
  73      *
  74      * Retrieve them via SN.msg(); this array is an implementation detail.
  75      *
  76      * @access private
  77      */
  78     messages: {},
  79
  80     /**
  81      * Grabs a localized string that's been previously exported to us
  82      * from server-side code via Action::getScriptMessages().
  83      *
  84      * @example alert(SN.msg('coolplugin-failed'));
  85      *
  86      * @param {String} key: string key name to pull from message index
  87      * @return matching localized message string
  88      */
  89     msg: function (key) {
  90         if (SN.messages[key] === undefined) {
  91             return '[' + key + ']';
  92         }
  93         return SN.messages[key];
  94     },
  95
  96     U: { // Utils
  97         /**
  98          * Setup function -- DOES NOT trigger actions immediately.
  99          *
 100          * Sets up event handlers on the new notice form.
 101          *
 102          * @param {jQuery} form: jQuery object whose first matching element is the form
 103          * @access private
 104          */
 105         FormNoticeEnhancements: function (form) {
 106             if ($.data(form[0], 'ElementData') === undefined) {
 107                 var MaxLength = form.find('.count').text();
 108                 if (MaxLength === undefined) {
 109                     MaxLength = SN.C.I.MaxLength;
 110                 }
 111                 $.data(form[0], 'ElementData', {MaxLength: MaxLength});
 112
 113                 SN.U.Counter(form);
 114
 115                 var NDT = form.find('.notice_data-text:first');
 116
 117                 NDT.on('keyup', function (e) {
 118                     SN.U.Counter(form);
 119                 });
 120
 121                 var delayedUpdate = function (e) {
 122                     // Cut and paste events fire *before* the operation,
 123                     // so we need to trigger an update in a little bit.
 124                     // This would be so much easier if the 'change' event
 125                     // actually fired every time the value changed. :P
 126                     window.setTimeout(function () {
 127                         SN.U.Counter(form);
 128                     }, 50);
 129                 };
 130                 // Note there's still no event for mouse-triggered 'delete'.
 131                 NDT.on('cut', delayedUpdate)
 132                     .on('paste', delayedUpdate);
 133             } else {
 134                 form.find('.count').text($.data(form[0], 'ElementData').MaxLength);
 135             }
 136         },
 137
 138         /**
 139          * To be called from event handlers on the notice import form.
 140          * Triggers an update of the remaining-characters counter.
 141          *
 142          * Additional counter updates will be suppressed during the
 143          * next half-second to avoid flooding the layout engine with
 144          * updates, followed by another automatic check.
 145          *
 146          * The maximum length is pulled from data established by
 147          * FormNoticeEnhancements.
 148          *
 149          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 150          * @access private
 151          */
 152         Counter: function (form) {
 153             SN.C.I.FormNoticeCurrent = form;
 154
 155             var MaxLength = $.data(form[0], 'ElementData').MaxLength;
 156
 157             if (MaxLength <= 0) {
 158                 return;
 159             }
 160
 161             var remaining = MaxLength - SN.U.CharacterCount(form);
 162             var counter = form.find('.count');
 163
 164             if (remaining.toString() != counter.text()) {
 165                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 166                     if (counter.text() != String(remaining)) {
 167                         counter.text(remaining);
 168                     }
 169                     if (remaining < 0) {
 170                         form.addClass(SN.C.S.Warning);
 171                     } else {
 172                         form.removeClass(SN.C.S.Warning);
 173                     }
 174                     // Skip updates for the next 500ms.
 175                     // On slower hardware, updating on every keypress is unpleasant.
 176                     if (!SN.C.I.CounterBlackout) {
 177                         SN.C.I.CounterBlackout = true;
 178                         SN.C.I.FormNoticeCurrent = form;
 179                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 180                     }
 181                 }
 182             }
 183         },
 184
 185         /**
 186          * Pull the count of characters in the current edit field.
 187          * Plugins replacing the edit control may need to override this.
 188          *
 189          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 190          * @return number of chars
 191          */
 192         CharacterCount: function (form) {
 193             return form.find('.notice_data-text:first').val().length;
 194         },
 195
 196         /**
 197          * Called internally after the counter update blackout period expires;
 198          * runs another update to make sure we didn't miss anything.
 199          *
 200          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 201          * @access private
 202          */
 203         ClearCounterBlackout: function (form) {
 204             // Allow keyup events to poke the counter again
 205             SN.C.I.CounterBlackout = false;
 206             // Check if the string changed since we last looked
 207             SN.U.Counter(form);
 208         },
 209
 210         /**
 211          * Helper function to rewrite default HTTP form action URLs to HTTPS
 212          * so we can actually fetch them when on an SSL page in ssl=sometimes
 213          * mode.
 214          *
 215          * It would be better to output URLs that didn't hardcode protocol
 216          * and hostname in the first place...
 217          *
 218          * @param {String} url
 219          * @return string
 220          */
 221         RewriteAjaxAction: function (url) {
 222             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 223             if (document.location.protocol === 'https:' && url.substr(0, 5) === 'http:') {
 224                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 225             }
 226             return url;
 227         },
 228
 229         FormNoticeUniqueID: function (form) {
 230             var oldId = form.attr('id');
 231             var newId = 'form_notice_' + Math.floor(Math.random()*999999999);
 232             var attrs = ['name', 'for', 'id'];
 233             for (var key in attrs) {
 234                 if (form.attr(attrs[key]) === undefined) {
 235                     continue;
 236                 }
 237                 form.attr(attrs[key], form.attr(attrs[key]).replace(oldId, newId));
 238             }
 239             for (var key in attrs) {
 240                 form.find("[" + attrs[key] + "*='" + oldId + "']").each(function () {
 241                         if ($(this).attr(attrs[key]) === undefined) {
 242                             return; // since we're inside the each(function () { ... });
 243                         }
 244                         var newAttr = $(this).attr(attrs[key]).replace(oldId, newId);
 245                         $(this).attr(attrs[key], newAttr);
 246                     });
 247             }
 248         },
 249
 250         /**
 251          * Grabs form data and submits it asynchronously, with 'ajax=1'
 252          * parameter added to the rest.
 253          *
 254          * If a successful response includes another form, that form
 255          * will be extracted and copied in, replacing the original form.
 256          * If there's no form, the first paragraph will be used.
 257          *
 258          * This will automatically be applied on the 'submit' event for
 259          * any form with the 'ajax' class.
 260          *
 261          * @fixme can sometimes explode confusingly if returnd data is bogus
 262          * @fixme error handling is pretty vague
 263          * @fixme can't submit file uploads
 264          *
 265          * @param {jQuery} form: jQuery object whose first element is a form
 266          * @param function onSuccess: something extra to do on success
 267          *
 268          * @access public
 269          */
 270         FormXHR: function (form, onSuccess) {
 271             $.ajax({
 272                 type: 'POST',
 273                 dataType: 'xml',
 274                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 275                 data: form.serialize() + '&ajax=1',
 276                 beforeSend: function (xhr) {
 277                     form
 278                         .addClass(SN.C.S.Processing)
 279                         .find('.submit')
 280                             .addClass(SN.C.S.Disabled)
 281                             .prop(SN.C.S.Disabled, true);
 282                 },
 283                 error: function (xhr, textStatus, errorThrown) {
 284                     // If the server end reported an error from StatusNet,
 285                     // find it -- otherwise we'll see what was reported
 286                     // from the browser.
 287                     var errorReported = null;
 288                     if (xhr.responseXML) {
 289                         errorReported = $('#error', xhr.responseXML).text();
 290                     }
 291                     window.alert(errorReported || errorThrown || textStatus);
 292
 293                     // Restore the form to original state.
 294                     // Hopefully. :D
 295                     form
 296                         .removeClass(SN.C.S.Processing)
 297                         .find('.submit')
 298                             .removeClass(SN.C.S.Disabled)
 299                             .prop(SN.C.S.Disabled, false);
 300                 },
 301                 success: function (data, textStatus) {
 302                     if ($('form', data)[0] !== undefined) {
 303                         var form_new = document._importNode($('form', data)[0], true);
 304                         form.replaceWith(form_new);
 305                         if (onSuccess) {
 306                             onSuccess();
 307                         }
 308                     } else if ($('p', data)[0] !== undefined) {
 309                         form.replaceWith(document._importNode($('p', data)[0], true));
 310                         if (onSuccess) {
 311                             onSuccess();
 312                         }
 313                     } else {
 314                         window.alert('Unknown error.');
 315                     }
 316                 }
 317             });
 318         },
 319
 320         /**
 321          * Setup function -- DOES NOT trigger actions immediately.
 322          *
 323          * Sets up event handlers for special-cased async submission of the
 324          * notice-posting form, including some pre-post validation.
 325          *
 326          * Unlike FormXHR() this does NOT submit the form immediately!
 327          * It sets up event handlers so that any method of submitting the
 328          * form (click on submit button, enter, submit() etc) will trigger
 329          * it properly.
 330          *
 331          * Also unlike FormXHR(), this system will use a hidden iframe
 332          * automatically to handle file uploads via <input type="file">
 333          * controls.
 334          *
 335          * @fixme tl;dr
 336          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 337          * @fixme error handling is unreliable
 338          * @fixme cookieValue is a global variable, but probably shouldn't be
 339          * @fixme saving the location cache cookies should be split out
 340          * @fixme some error messages are hardcoded english: needs i18n
 341          *
 342          * @param {jQuery} form: jQuery object whose first element is a form
 343          *
 344          * @access public
 345          */
 346         FormNoticeXHR: function (form) {
 347             SN.C.I.NoticeDataGeo = {};
 348             form.append('<input type="hidden" name="ajax" value="1"/>');
 349
 350             // Make sure we don't have a mixed HTTP/HTTPS submission...
 351             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 352
 353             /**
 354              * Hide the previous response feedback, if any.
 355              */
 356             var removeFeedback = function () {
 357                 form.find('.form_response').remove();
 358             };
 359
 360             form.ajaxForm({
 361                 dataType: 'xml',
 362                 timeout: SN.V.xhrTimeout,
 363                 beforeSend: function (formData) {
 364                     if (form.find('.notice_data-text:first').val() == '') {
 365                         form.addClass(SN.C.S.Warning);
 366                         return false;
 367                     }
 368                     form
 369                         .addClass(SN.C.S.Processing)
 370                         .find('.submit')
 371                             .addClass(SN.C.S.Disabled)
 372                             .prop(SN.C.S.Disabled, true);
 373
 374                     SN.U.normalizeGeoData(form);
 375
 376                     return true;
 377                 },
 378                 error: function (xhr, textStatus, errorThrown) {
 379                     form
 380                         .removeClass(SN.C.S.Processing)
 381                         .find('.submit')
 382                             .removeClass(SN.C.S.Disabled)
 383                             .prop(SN.C.S.Disabled, false);
 384                     removeFeedback();
 385                     if (textStatus == 'timeout') {
 386                         // @fixme i18n
 387                         SN.U.showFeedback(form, 'error', 'Sorry! We had trouble sending your notice. The servers are overloaded. Please try again, and contact the site administrator if this problem persists.');
 388                     } else {
 389                         var response = SN.U.GetResponseXML(xhr);
 390                         if ($('.' + SN.C.S.Error, response).length > 0) {
 391                             form.append(document._importNode($('.' + SN.C.S.Error, response)[0], true));
 392                         } else {
 393                             if (parseInt(xhr.status) === 0 || $.inArray(parseInt(xhr.status), SN.C.I.HTTP20x30x) >= 0) {
 394                                 form
 395                                     .resetForm()
 396                                     .find('.attach-status').remove();
 397                                 SN.U.FormNoticeEnhancements(form);
 398                             } else {
 399                                 // @fixme i18n
 400                                 SN.U.showFeedback(form, 'error', '(Sorry! We had trouble sending your notice (' + xhr.status + ' ' + xhr.statusText + '). Please report the problem to the site administrator if this happens again.');
 401                             }
 402                         }
 403                     }
 404                 },
 405                 success: function (data, textStatus) {
 406                     removeFeedback();
 407                     var errorResult = $('#' + SN.C.S.Error, data);
 408                     if (errorResult.length > 0) {
 409                         SN.U.showFeedback(form, 'error', errorResult.text());
 410                     } else {
 411                         SN.E.ajaxNoticePosted(form, data, textStatus);
 412                     }
 413                 },
 414                 complete: function (xhr, textStatus) {
 415                     form
 416                         .removeClass(SN.C.S.Processing)
 417                         .find('.submit')
 418                             .prop(SN.C.S.Disabled, false)
 419                             .removeClass(SN.C.S.Disabled);
 420
 421                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 422                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 423                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 424                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 425                     form.find('[name=notice_data-geo]').prop('checked', SN.C.I.NoticeDataGeo.NDG);
 426                 }
 427             });
 428         },
 429
 430         FormProfileSearchXHR: function (form) {
 431             $.ajax({
 432                 type: 'POST',
 433                 dataType: 'xml',
 434                 url: form.attr('action'),
 435                 data: form.serialize() + '&ajax=1',
 436                 beforeSend: function (xhr) {
 437                     form
 438                         .addClass(SN.C.S.Processing)
 439                         .find('.submit')
 440                             .addClass(SN.C.S.Disabled)
 441                             .prop(SN.C.S.Disabled, true);
 442                 },
 443                 error: function (xhr, textStatus, errorThrown) {
 444                     window.alert(errorThrown || textStatus);
 445                 },
 446                 success: function (data, textStatus) {
 447                     var results_placeholder = $('#profile_search_results');
 448                     if ($('ul', data)[0] !== undefined) {
 449                         var list = document._importNode($('ul', data)[0], true);
 450                         results_placeholder.replaceWith(list);
 451                     } else {
 452                         var _error = $('<li/>').append(document._importNode($('p', data)[0], true));
 453                         results_placeholder.html(_error);
 454                     }
 455                     form
 456                         .removeClass(SN.C.S.Processing)
 457                         .find('.submit')
 458                             .removeClass(SN.C.S.Disabled)
 459                             .prop(SN.C.S.Disabled, false);
 460                 }
 461             });
 462         },
 463
 464         FormPeopletagsXHR: function (form) {
 465             $.ajax({
 466                 type: 'POST',
 467                 dataType: 'xml',
 468                 url: form.attr('action'),
 469                 data: form.serialize() + '&ajax=1',
 470                 beforeSend: function (xhr) {
 471                     form.find('.submit')
 472                             .addClass(SN.C.S.Processing)
 473                             .addClass(SN.C.S.Disabled)
 474                             .prop(SN.C.S.Disabled, true);
 475                 },
 476                 error: function (xhr, textStatus, errorThrown) {
 477                     window.alert(errorThrown || textStatus);
 478                 },
 479                 success: function (data, textStatus) {
 480                     var results_placeholder = form.parents('.entity_tags');
 481                     if ($('.entity_tags', data)[0] !== undefined) {
 482                         var tags = document._importNode($('.entity_tags', data)[0], true);
 483                         $(tags).find('.editable').append($('<button class="peopletags_edit_button"/>'));
 484                         results_placeholder.replaceWith(tags);
 485                     } else {
 486                         results_placeholder.find('p').remove();
 487                         results_placeholder.append(document._importNode($('p', data)[0], true));
 488                         form.removeClass(SN.C.S.Processing)
 489                             .find('.submit')
 490                                 .removeClass(SN.C.S.Disabled)
 491                                 .prop(SN.C.S.Disabled, false);
 492                     }
 493                 }
 494             });
 495         },
 496
 497         normalizeGeoData: function (form) {
 498             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 499             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 500             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 501             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 502             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked'); // @fixme (does this still need to be fixed somehow?)
 503
 504             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 505
 506             if (cookieValue !== undefined && cookieValue != 'disabled') {
 507                 cookieValue = JSON.parse(cookieValue);
 508                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 509                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 510                 if (cookieValue.NLNS) {
 511                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 512                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 513                 } else {
 514                     form.find('[name=location_ns]').val('');
 515                     form.find('[name=location_id]').val('');
 516                 }
 517             }
 518             if (cookieValue == 'disabled') {
 519                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', false).prop('checked');
 520             } else {
 521                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', true).prop('checked');
 522             }
 523
 524         },
 525
 526         /**
 527          * Fetch an XML DOM from an XHR's response data.
 528          *
 529          * Works around unavailable responseXML when document.domain
 530          * has been modified by Meteor or other tools, in some but not
 531          * all browsers.
 532          *
 533          * @param {XMLHTTPRequest} xhr
 534          * @return DOMDocument
 535          */
 536         GetResponseXML: function (xhr) {
 537             try {
 538                 return xhr.responseXML;
 539             } catch (e) {
 540                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 541             }
 542         },
 543
 544         /**
 545          * Setup function -- DOES NOT trigger actions immediately.
 546          *
 547          * Sets up event handlers on all visible notice's option <a> elements
 548          * with the "popup" class so they behave as expected with AJAX.
 549          *
 550          * (without javascript the link goes to a page that expects you to verify
 551          * the action through a form)
 552          *
 553          * @access private
 554          */
 555         NoticeOptionsAjax: function () {
 556             $(document).on('click', '.notice-options > a.popup', function (e) {
 557                 e.preventDefault();
 558                 var noticeEl = $(this).closest('.notice');
 559                 $.ajax({
 560                     url: $(this).attr('href'),
 561                     data: {ajax: 1},
 562                     success: function (data, textStatus, xhr) {
 563                         SN.U.NoticeOptionPopup(data, noticeEl);
 564                     },
 565                 });
 566                 return false;
 567             });
 568         },
 569
 570         NoticeOptionPopup: function (data, noticeEl) {
 571             title = $('head > title', data).text();
 572             body = $('body', data).html();
 573             dialog = $(body).dialog({
 574                     height: "auto",
 575                     width: "auto",
 576                     modal: true,
 577                     resizable: true,
 578                     title: title,
 579                 });
 580         },
 581
 582         /**
 583          * Setup function -- DOES NOT trigger actions immediately.
 584          *
 585          * Sets up event handlers on all visible notice's reply buttons to
 586          * tweak the new-notice form with needed variables and focus it
 587          * when pushed.
 588          *
 589          * (This replaces the default reply button behavior to submit
 590          * directly to a form which comes back with a specialized page
 591          * with the form data prefilled.)
 592          *
 593          * @access private
 594          */
 595         NoticeReply: function () {
 596             $(document).on('click', '#content .notice_reply', function (e) {
 597                 e.preventDefault();
 598                 var notice = $(this).closest('li.notice');
 599                 SN.U.NoticeInlineReplyTrigger(notice);
 600                 return false;
 601             });
 602         },
 603
 604         /**
 605          * Stub -- kept for compat with plugins for now.
 606          * @access private
 607          */
 608         NoticeReplyTo: function (notice) {
 609         },
 610
 611         /**
 612          * Open up a notice's inline reply box.
 613          *
 614          * @param {jQuery} notice: jQuery object containing one notice
 615          * @param {String} initialText
 616          */
 617         NoticeInlineReplyTrigger: function (notice, initialText) {
 618             // Find the notice we're replying to...
 619             var id = $($('.notice_id', notice)[0]).text();
 620             var replyForm;
 621             var parentNotice = notice;
 622             var stripForm = true; // strip a couple things out of reply forms that are inline
 623
 624             var list = notice.find('.threaded-replies');
 625             if (list.length == 0) {
 626                 list = notice.closest('.threaded-replies');
 627             }
 628             if (list.length == 0) {
 629                 list = $('<ul class="notices threaded-replies xoxo"></ul>');
 630                 notice.append(list);
 631                 list = notice.find('.threaded-replies');
 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                 replyItem.show();
 645
 646                 // Set focus...
 647                 var text = replyForm.find('textarea');
 648                 if (text.length == 0) {
 649                     throw "No textarea";
 650                 }
 651                 var replyto = '';
 652                 if (initialText) {
 653                     replyto = initialText + ' ';
 654                 }
 655                 text.val(replyto + text.val().replace(new RegExp(replyto, 'i'), ''));
 656                 text.data('initialText', $.trim(initialText));
 657                 text.focus();
 658                 if (text[0].setSelectionRange) {
 659                     var len = text.val().length;
 660                     text[0].setSelectionRange(len, len);
 661                 }
 662             };
 663
 664             // Create the reply form entry
 665             var replyItem = $('li.notice-reply', list);
 666             if (replyItem.length == 0) {
 667                 replyItem = $('<li class="notice-reply"></li>');
 668             }
 669             replyForm = replyItem.children('form');
 670             if (replyForm.length == 0) {
 671                 // Let's try another trick to avoid fetching by URL
 672                 var noticeForm = $('#input_form_status > form');
 673                 if (noticeForm.length == 0) {
 674                     // No notice form found on the page, so let's just
 675                     // fetch a fresh copy of the notice form over AJAX.
 676                     $.ajax({
 677                         url: SN.V.urlNewNotice,
 678                         data: {ajax: 1, inreplyto: id},
 679                         success: function (data, textStatus, xhr) {
 680                             var formEl = document._importNode($('form', data)[0], true);
 681                             replyForm = $(formEl);
 682                             replyItem.append(replyForm);
 683                             list.append(replyItem);
 684
 685                             SN.Init.NoticeFormSetup(replyForm);
 686                             nextStep();
 687                         },
 688                     });
 689                     // We do everything relevant in 'success' above
 690                     return;
 691                 }
 692                 replyForm = noticeForm.clone();
 693                 SN.Init.NoticeFormSetup(replyForm);
 694                 replyItem.append(replyForm);
 695                 list.append(replyItem);
 696             }
 697             // replyForm is set, we're not fetching by URL...
 698             // Next setp is to configure in-reply-to etc.
 699             nextStep();
 700         },
 701
 702         /**
 703          * Setup function -- DOES NOT apply immediately.
 704          *
 705          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 706          */
 707         NoticeInlineReplySetup: function () {
 708             // Expand conversation links
 709             $(document).on('click', 'li.notice-reply-comments a', function () {
 710                     var url = $(this).attr('href');
 711                     var area = $(this).closest('.threaded-replies');
 712                     $.ajax({
 713                         url: url,
 714                         data: {ajax: 1},
 715                         success: 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                     });
 722                     return false;
 723                 });
 724         },
 725
 726         /**
 727          * Setup function -- DOES NOT trigger actions immediately.
 728          *
 729          * Sets up event handlers for repeat forms to toss up a confirmation
 730          * popout before submitting.
 731          *
 732          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 733          *
 734          */
 735         NoticeRepeat: function () {
 736             $('body').on('click', '.form_repeat', function (e) {
 737                 e.preventDefault();
 738
 739                 SN.U.NoticeRepeatConfirmation($(this));
 740                 return false;
 741             });
 742         },
 743
 744         /**
 745          * Shows a confirmation dialog box variant of the repeat button form.
 746          * This seems to use a technique where the repeat form contains
 747          * _both_ a standalone button _and_ text and buttons for a dialog.
 748          * The dialog will close after its copy of the form is submitted,
 749          * or if you click its 'close' button.
 750          *
 751          * The dialog is created by duplicating the original form and changing
 752          * its style; while clever, this is hard to generalize and probably
 753          * duplicates a lot of unnecessary HTML output.
 754          *
 755          * @fixme create confirmation dialogs through a generalized interface
 756          * that can be reused instead of hardcoded text and styles.
 757          *
 758          * @param {jQuery} form
 759          */
 760         NoticeRepeatConfirmation: function (form) {
 761             var submit_i = form.find('.submit');
 762
 763             var submit = submit_i.clone();
 764             submit
 765                 .addClass('submit_dialogbox')
 766                 .removeClass('submit');
 767             form.append(submit);
 768             submit.on('click', function () { SN.U.FormXHR(form); return false; });
 769
 770             submit_i.hide();
 771
 772             form
 773                 .addClass('dialogbox')
 774                 .append('<button class="close" title="' + SN.msg('popup_close_button') + '">&#215;</button>')
 775                 .closest('.notice-options')
 776                     .addClass('opaque');
 777
 778             form.find('button.close').click(function () {
 779                 $(this).remove();
 780
 781                 form
 782                     .removeClass('dialogbox')
 783                     .closest('.notice-options')
 784                         .removeClass('opaque');
 785
 786                 form.find('.submit_dialogbox').remove();
 787                 form.find('.submit').show();
 788
 789                 return false;
 790             });
 791         },
 792
 793         /**
 794          * Setup function -- DOES NOT trigger actions immediately.
 795          *
 796          * Goes through all notices currently displayed and sets up attachment
 797          * handling if needed.
 798          */
 799         NoticeAttachments: function () {
 800             $('.notice a.attachment').each(function () {
 801                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 802             });
 803         },
 804
 805         /**
 806          * Setup function -- DOES NOT trigger actions immediately.
 807          *
 808          * Sets up special attachment link handling if needed. Currently this
 809          * consists only of making the "more" button used for OStatus message
 810          * cropping turn into an auto-expansion button that loads the full
 811          * text from an attachment file.
 812          *
 813          * @param {jQuery} notice
 814          */
 815         NoticeWithAttachment: function (notice) {
 816             if (notice.find('.attachment').length === 0) {
 817                 return;
 818             }
 819
 820                         $(document).on('click','.attachment.more',function () {
 821                                 var m = $(this);
 822                                 m.addClass(SN.C.S.Processing);
 823                                 $.get(m.attr('href'), {ajax: 1}, function (data) {
 824                                         m.parent('.e-content').html($(data).find('#attachment_view .e-content').html());
 825                                 });
 826
 827                                 return false;
 828                         });
 829
 830         },
 831
 832         /**
 833          * Setup function -- DOES NOT trigger actions immediately.
 834          *
 835          * Sets up event handlers for the file-attachment widget in the
 836          * new notice form. When a file is selected, a box will be added
 837          * below the text input showing the filename and, if supported
 838          * by the browser, a thumbnail preview.
 839          *
 840          * This preview box will also allow removing the attachment
 841          * prior to posting.
 842          *
 843          * @param {jQuery} form
 844          */
 845         NoticeDataAttach: function (form) {
 846             var i;
 847             var NDA = form.find('input[type=file]');
 848             NDA.change(function (event) {
 849                 form.find('.attach-status').remove();
 850
 851                 if (typeof this.files === "object") {
 852                     var attachStatus = $('<ul class="attach-status ' + SN.C.S.Success + '"></ul>');
 853                     form.append(attachStatus);
 854                     // Some newer browsers will let us fetch the files for preview.
 855                     for (i = 0; i < this.files.length; i++) {
 856                         SN.U.PreviewAttach(form, this.files[i]);
 857                     }
 858                 } else {
 859                     var filename = $(this).val();
 860                     if (!filename) {
 861                         // No file -- we've been tricked!
 862                         return false;
 863                     }
 864
 865                     var attachStatus = $('<div class="attach-status ' + SN.C.S.Success + '"><code></code> <button class="close">&#215;</button></div>');
 866                     attachStatus.find('code').text(filename);
 867                     attachStatus.find('button').click(function () {
 868                         attachStatus.remove();
 869                         NDA.val('');
 870
 871                         return false;
 872                     });
 873                     form.append(attachStatus);
 874                 }
 875             });
 876         },
 877
 878         /**
 879          * Get PHP's MAX_FILE_SIZE setting for this form;
 880          * used to apply client-side file size limit checks.
 881          *
 882          * @param {jQuery} form
 883          * @return int max size in bytes; 0 or negative means no limit
 884          */
 885         maxFileSize: function (form) {
 886             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 887             if (max) {
 888                 return parseInt(max);
 889             }
 890             return 0;
 891         },
 892
 893         /**
 894          * For browsers with FileAPI support: make a thumbnail if possible,
 895          * and append it into the attachment display widget.
 896          *
 897          * Known good:
 898          * - Firefox 3.6.6, 4.0b7
 899          * - Chrome 8.0.552.210
 900          *
 901          * Known ok metadata, can't get contents:
 902          * - Safari 5.0.2
 903          *
 904          * Known fail:
 905          * - Opera 10.63, 11 beta (no input.files interface)
 906          *
 907          * @param {jQuery} form
 908          * @param {File} file
 909          *
 910          * @todo use configured thumbnail size
 911          * @todo detect pixel size?
 912          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 913          */
 914         PreviewAttach: function (form, file) {
 915             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 916             var preview = true;
 917
 918             var blobAsDataURL;
 919             if (window.createObjectURL !== undefined) {
 920                 /**
 921                  * createObjectURL lets us reference the file directly from an <img>
 922                  * This produces a compact URL with an opaque reference to the file,
 923                  * which we can reference immediately.
 924                  *
 925                  * - Firefox 3.6.6: no
 926                  * - Firefox 4.0b7: no
 927                  * - Safari 5.0.2: no
 928                  * - Chrome 8.0.552.210: works!
 929                  */
 930                 blobAsDataURL = function (blob, callback) {
 931                     callback(window.createObjectURL(blob));
 932                 };
 933             } else if (window.FileReader !== undefined) {
 934                 /**
 935                  * FileAPI's FileReader can build a data URL from a blob's contents,
 936                  * but it must read the file and build it asynchronously. This means
 937                  * we'll be passing a giant data URL around, which may be inefficient.
 938                  *
 939                  * - Firefox 3.6.6: works!
 940                  * - Firefox 4.0b7: works!
 941                  * - Safari 5.0.2: no
 942                  * - Chrome 8.0.552.210: works!
 943                  */
 944                 blobAsDataURL = function (blob, callback) {
 945                     var reader = new FileReader();
 946                     reader.onload = function (event) {
 947                         callback(reader.result);
 948                     };
 949                     reader.readAsDataURL(blob);
 950                 };
 951             } else {
 952                 preview = false;
 953             }
 954
 955             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml',
 956                               'image/bmp', 'image/webp', 'image/vnd.microsoft.icon'];
 957             if ($.inArray(file.type, imageTypes) == -1) {
 958                 // We probably don't know how to show the file.
 959                 preview = false;
 960             }
 961
 962             var maxSize = 8 * 1024 * 1024;
 963             if (file.size > maxSize) {
 964                 // Don't kill the browser trying to load some giant image.
 965                 preview = false;
 966             }
 967
 968             var fileentry = $('<li>')
 969                 .attr('class', 'attachment')
 970                 .attr('style', 'text-align: center');
 971             if (preview) {
 972                 blobAsDataURL(file, function (url) {
 973                     var img = $('<img>')
 974                         .attr('title', tooltip)
 975                         .attr('alt', tooltip)
 976                         .attr('src', url)
 977                         .attr('style', 'height: 120px');
 978                     fileentry.append(img);
 979                     fileentry.append($('<br><code>' + file.name + '</code>'));
 980                     form.find('.attach-status').append(fileentry);
 981                 });
 982             } else {
 983                 fileentry.append($('<code>' + file.type + '</code>'));
 984                 fileentry.append($('<br><code>' + file.name + '</code>'));
 985                 form.find('.attach-status').append(fileentry);
 986             }
 987         },
 988
 989         /**
 990          * Setup function -- DOES NOT trigger actions immediately.
 991          *
 992          * Initializes state for the location-lookup features in the
 993          * new-notice form. Seems to set up some event handlers for
 994          * triggering lookups and using the new values.
 995          *
 996          * @param {jQuery} form
 997          *
 998          * @fixme tl;dr
 999          * @fixme there's not good visual state update here, so users have a
1000          *        hard time figuring out if it's working or fixing if it's wrong.
1001          *
1002          */
1003         NoticeLocationAttach: function (form) {
1004             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
1005             var NLat = form.find('[name=lat]');
1006             var NLon = form.find('[name=lon]');
1007             var NLNS = form.find('[name=location_ns]').val();
1008             var NLID = form.find('[name=location_id]').val();
1009             var NLN = ''; // @fixme
1010             var NDGe = form.find('[name=notice_data-geo]');
1011             var check = form.find('[name=notice_data-geo]');
1012             var label = form.find('label.notice_data-geo');
1013
1014             function removeNoticeDataGeo(error) {
1015                 label
1016                     .attr('title', $.trim(label.text()))
1017                     .removeClass('checked');
1018
1019                 form.find('[name=lat]').val('');
1020                 form.find('[name=lon]').val('');
1021                 form.find('[name=location_ns]').val('');
1022                 form.find('[name=location_id]').val('');
1023                 form.find('[name=notice_data-geo]').prop('checked', false);
1024
1025                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1026
1027                 if (error) {
1028                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1029                     form.find('.geo_status_wrapper .geo_status').text(error);
1030                 } else {
1031                     form.find('.geo_status_wrapper').remove();
1032                 }
1033             }
1034
1035             function getJSONgeocodeURL(geocodeURL, data) {
1036                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1037                 $.getJSON(geocodeURL, data, function (location) {
1038                     var lns, lid, NLN_text;
1039
1040                     if (location.location_ns !== undefined) {
1041                         form.find('[name=location_ns]').val(location.location_ns);
1042                         lns = location.location_ns;
1043                     }
1044
1045                     if (location.location_id !== undefined) {
1046                         form.find('[name=location_id]').val(location.location_id);
1047                         lid = location.location_id;
1048                     }
1049
1050                     if (location.name === undefined) {
1051                         NLN_text = data.lat + ';' + data.lon;
1052                     } else {
1053                         NLN_text = location.name;
1054                     }
1055
1056                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1057                     label
1058                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1059
1060                     form.find('[name=lat]').val(data.lat);
1061                     form.find('[name=lon]').val(data.lon);
1062                     form.find('[name=location_ns]').val(lns);
1063                     form.find('[name=location_id]').val(lid);
1064                     form.find('[name=notice_data-geo]').prop('checked', true);
1065
1066                     var cookieValue = {
1067                         NLat: data.lat,
1068                         NLon: data.lon,
1069                         NLNS: lns,
1070                         NLID: lid,
1071                         NLN: NLN_text,
1072                         NLNU: location.url,
1073                         NDG: true
1074                     };
1075
1076                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1077                 });
1078             }
1079
1080             if (check.length > 0) {
1081                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1082                     check.prop('checked', false);
1083                 } else {
1084                     check.prop('checked', true);
1085                 }
1086
1087                 var NGW = form.find('.notice_data-geo_wrap');
1088                 var geocodeURL = NGW.attr('data-api');
1089
1090                 label.attr('title', label.text());
1091
1092                 check.change(function () {
1093                     if (check.prop('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === undefined) {
1094                         label
1095                             .attr('title', NoticeDataGeo_text.ShareDisable)
1096                             .addClass('checked');
1097
1098                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === undefined || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1099                             if (navigator.geolocation) {
1100                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1101                                 navigator.geolocation.getCurrentPosition(
1102                                     function (position) {
1103                                         form.find('[name=lat]').val(position.coords.latitude);
1104                                         form.find('[name=lon]').val(position.coords.longitude);
1105
1106                                         var data = {
1107                                             lat: position.coords.latitude,
1108                                             lon: position.coords.longitude,
1109                                             token: $('#token').val()
1110                                         };
1111
1112                                         getJSONgeocodeURL(geocodeURL, data);
1113                                     },
1114
1115                                     function (error) {
1116                                         switch(error.code) {
1117                                             case error.PERMISSION_DENIED:
1118                                                 removeNoticeDataGeo('Location permission denied.');
1119                                                 break;
1120                                             case error.TIMEOUT:
1121                                                 //$('#' + SN.C.S.NoticeDataGeo).prop('checked', false);
1122                                                 removeNoticeDataGeo('Location lookup timeout.');
1123                                                 break;
1124                                         }
1125                                     },
1126
1127                                     {
1128                                         timeout: 10000
1129                                     }
1130                                 );
1131                             } else {
1132                                 if (NLat.length > 0 && NLon.length > 0) {
1133                                     var data = {
1134                                         lat: NLat,
1135                                         lon: NLon,
1136                                         token: $('#token').val()
1137                                     };
1138
1139                                     getJSONgeocodeURL(geocodeURL, data);
1140                                 } else {
1141                                     removeNoticeDataGeo();
1142                                     check.remove();
1143                                     label.remove();
1144                                 }
1145                             }
1146                         } else {
1147                             try {
1148                                 var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1149
1150                                 form.find('[name=lat]').val(cookieValue.NLat);
1151                                 form.find('[name=lon]').val(cookieValue.NLon);
1152                                 form.find('[name=location_ns]').val(cookieValue.NLNS);
1153                                 form.find('[name=location_id]').val(cookieValue.NLID);
1154                                 form.find('[name=notice_data-geo]').prop('checked', cookieValue.NDG);
1155
1156                                SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1157                                 label
1158                                     .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1159                                     .addClass('checked');
1160                             } catch (e) {
1161                                 console.log('Parsing error:', e);
1162                             }
1163                         }
1164                     } else {
1165                         removeNoticeDataGeo();
1166                     }
1167                 }).change();
1168             }
1169         },
1170
1171         /**
1172          * Create or update a geolocation status widget in this notice posting form.
1173          *
1174          * @param {jQuery} form
1175          * @param {String} status
1176          * @param {String} lat (optional)
1177          * @param {String} lon (optional)
1178          * @param {String} url (optional)
1179          */
1180         NoticeGeoStatus: function (form, status, lat, lon, url)
1181         {
1182             var wrapper = form.find('.geo_status_wrapper');
1183             if (wrapper.length == 0) {
1184                 wrapper = $('<div class="' + SN.C.S.Success + ' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1185                 wrapper.find('button.close').click(function () {
1186                     form.find('[name=notice_data-geo]').prop('checked', false).change();
1187                     return false;
1188                 });
1189                 form.append(wrapper);
1190             }
1191             var label;
1192             if (url) {
1193                 label = $('<a></a>').attr('href', url);
1194             } else {
1195                 label = $('<span></span>');
1196             }
1197             label.text(status);
1198             if (lat || lon) {
1199                 var latlon = lat + ';' + lon;
1200                 label.attr('title', latlon);
1201                 if (!status) {
1202                     label.text(latlon)
1203                 }
1204             }
1205             wrapper.find('.geo_status').empty().append(label);
1206         },
1207
1208         /**
1209          * Setup function -- DOES NOT trigger actions immediately.
1210          *
1211          * Initializes event handlers for the "Send direct message" link on
1212          * profile pages, setting it up to display a dialog box when clicked.
1213          *
1214          * Unlike the repeat confirmation form, this appears to fetch
1215          * the form _from the original link target_, so the form itself
1216          * doesn't need to be in the current document.
1217          *
1218          * @fixme breaks ability to open link in new window?
1219          */
1220         NewDirectMessage: function () {
1221             NDM = $('.entity_send-a-message a');
1222             NDM.attr({'href': NDM.attr('href') + '&ajax=1'});
1223             NDM.on('click', function () {
1224                 var NDMF = $('.entity_send-a-message form');
1225                 if (NDMF.length === 0) {
1226                     $(this).addClass(SN.C.S.Processing);
1227                     $.get(NDM.attr('href'), null, function (data) {
1228                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1229                         NDMF = $('.entity_send-a-message .form_notice');
1230                         SN.U.FormNoticeXHR(NDMF);
1231                         SN.U.FormNoticeEnhancements(NDMF);
1232                         NDMF.append('<button class="close">&#215;</button>');
1233                         $('.entity_send-a-message button').click(function () {
1234                             NDMF.hide();
1235                             return false;
1236                         });
1237                         NDM.removeClass(SN.C.S.Processing);
1238                     });
1239                 } else {
1240                     NDMF.show();
1241                     $('.entity_send-a-message textarea').focus();
1242                 }
1243                 return false;
1244             });
1245         },
1246
1247         /**
1248          * Return a date object with the current local time on the
1249          * given year, month, and day.
1250          *
1251          * @param {number} year: 4-digit year
1252          * @param {number} month: 0 == January
1253          * @param {number} day: 1 == 1
1254          * @return {Date}
1255          */
1256         GetFullYear: function (year, month, day) {
1257             var date = new Date();
1258             date.setFullYear(year, month, day);
1259
1260             return date;
1261         },
1262
1263         /**
1264          * Check if the current page is a timeline where the current user's
1265          * posts should be displayed immediately on success.
1266          *
1267          * @fixme this should be done in a saner way, with machine-readable
1268          * info about what page we're looking at.
1269          *
1270          * @param {DOMElement} notice: HTML chunk with formatted notice
1271          * @return boolean
1272          */
1273         belongsOnTimeline: function (notice) {
1274             var action = $("body").attr('id');
1275             if (action == 'public') {
1276                 return true;
1277             }
1278
1279             var profileLink = $('#nav_profile a').attr('href');
1280             if (profileLink) {
1281                 var authorUrl = $(notice).find('.h-card.p-author').attr('href');
1282                 if (authorUrl == profileLink) {
1283                     if (action == 'all' || action == 'showstream') {
1284                         // Posts always show on your own friends and profile streams.
1285                         return true;
1286                     }
1287                 }
1288             }
1289
1290             // @fixme tag, group, reply timelines should be feasible as well.
1291             // Mismatch between id-based and name-based user/group links currently complicates
1292             // the lookup, since all our inline mentions contain the absolute links but the
1293             // UI links currently on the page use malleable names.
1294
1295             return false;
1296         },
1297
1298         /**
1299          * Switch to another active input sub-form.
1300          * This will hide the current form (if any), show the new one, and
1301          * update the input type tab selection state.
1302          *
1303          * @param {String} tag
1304          */
1305         switchInputFormTab: function (tag, setFocus) {
1306             if (typeof setFocus === 'undefined') { setFocus = true; }
1307             // The one that's current isn't current anymore
1308             $('.input_form_nav_tab.current').removeClass('current');
1309             if (tag != null) {
1310                 $('#input_form_nav_' + tag).addClass('current');
1311             }
1312
1313             // Don't remove 'current' if we also have the "nonav" class.
1314             // An example would be the message input form. removing
1315             // 'current' will cause the form to vanish from the page.
1316             var nonav = $('.input_form.current.nonav');
1317             if (nonav.length > 0) {
1318                 return;
1319             }
1320
1321             $('.input_form.current').removeClass('current');
1322             if (tag == null) {
1323                 // we're done here, no new inputform to focus on
1324                 return false;
1325             }
1326
1327             var noticeForm = $('#input_form_' + tag)
1328                     .addClass('current')
1329                     .find('.ajax-notice').each(function () {
1330                         var form = $(this);
1331                         SN.Init.NoticeFormSetup(form);
1332                     });
1333             if (setFocus) {
1334                 noticeForm.find('.notice_data-text').focus();
1335             }
1336
1337             return false;
1338         },
1339
1340         showMoreMenuItems: function (menuid) {
1341             $('#' + menuid + ' .more_link').remove();
1342             var selector = '#' + menuid + ' .extended_menu';
1343             var extended = $(selector);
1344             extended.removeClass('extended_menu');
1345             return void(0);
1346         },
1347
1348         /**
1349          * Show a response feedback bit under a form.
1350          *
1351          * @param {Element} form: the new-notice form usually
1352          * @param {String}  cls: CSS class name to use ('error' or 'success')
1353          * @param {String}  text
1354          * @access public
1355          */
1356         showFeedback: function (form, cls, text) {
1357             form.append(
1358                 $('<p class="form_response"></p>')
1359                     .addClass(cls)
1360                     .text(text)
1361             );
1362         },
1363
1364         addCallback: function (ename, callback) {
1365             // initialize to array if it's undefined
1366             if (typeof SN._callbacks[ename] === 'undefined') {
1367                 SN._callbacks[ename] = [];
1368             }
1369             SN._callbacks[ename].push(callback);
1370         },
1371
1372         runCallbacks: function (ename, data) {
1373             if (typeof SN._callbacks[ename] === 'undefined') {
1374                 return;
1375             }
1376             for (cbname in SN._callbacks[ename]) {
1377                 SN._callbacks[ename][cbname](data);
1378             }
1379         }
1380     },
1381
1382     E: {    /* Events */
1383         /* SN.E.ajaxNoticePosted, called when a notice has been posted successfully via an AJAX form
1384             @param  form        the originating form element
1385             @param  data        data from success() callback
1386             @param  textStatus  textStatus from success() callback
1387         */
1388         ajaxNoticePosted: function (form, data, textStatus) {
1389             var commandResult = $('#' + SN.C.S.CommandResult, data);
1390             if (commandResult.length > 0) {
1391                 SN.U.showFeedback(form, 'success', commandResult.text());
1392             } else {
1393                 // New notice post was successful. If on our timeline, show it!
1394                 var notice = document._importNode($('li', data)[0], true);
1395                 var notices = $('#notices_primary .notices:first');
1396                 var replyItem = form.closest('li.notice-reply');
1397
1398                 if (replyItem.length > 0) {
1399                     // If this is an inline reply, remove the form...
1400                     var list = form.closest('.threaded-replies');
1401
1402                     var id = $(notice).attr('id');
1403                     if ($('#' + id).length == 0) {
1404                         $(notice).insertBefore(replyItem);
1405                     } // else Realtime came through before us...
1406
1407                     replyItem.remove();
1408
1409                 } else if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
1410                     // Not a reply. If on our timeline, show it at the top!
1411
1412                     if ($('#' + notice.id).length === 0) {
1413                         var notice_irt_value = form.find('[name=inreplyto]').val();
1414                         var notice_irt = '#notices_primary #notice-' + notice_irt_value;
1415                         if ($('body')[0].id == 'conversation') {
1416                             if (notice_irt_value.length > 0 && $(notice_irt + ' .notices').length < 1) {
1417                                 $(notice_irt).append('<ul class="notices"></ul>');
1418                             }
1419                             $($(notice_irt + ' .notices')[0]).append(notice);
1420                         } else {
1421                             notices.prepend(notice);
1422                         }
1423                         $('#' + notice.id)
1424                             .css({display: 'none'})
1425                             .fadeIn(2500);
1426                         SN.U.NoticeWithAttachment($('#' + notice.id));
1427                         SN.U.switchInputFormTab(null);
1428                     }
1429                 } else {
1430                     // Not on a timeline that this belongs on?
1431                     // Just show a success message.
1432                     // @fixme inline
1433                     SN.U.showFeedback(form, 'success', $('title', data).text());
1434                 }
1435             }
1436             form.resetForm();
1437             form.find('[name=inreplyto]').val('');
1438             form.find('.attach-status').remove();
1439             SN.U.FormNoticeEnhancements(form);
1440
1441             SN.U.runCallbacks('notice_posted', {"notice": notice});
1442         },
1443     },
1444
1445
1446     Init: {
1447         /**
1448          * If user is logged in, run setup code for the new notice form:
1449          *
1450          *  - char counter
1451          *  - AJAX submission
1452          *  - location events
1453          *  - file upload events
1454          */
1455         NoticeForm: function () {
1456             if ($('body.user_in').length > 0) {
1457                 // SN.Init.NoticeFormSetup() will get run
1458                 // when forms get displayed for the first time...
1459
1460                 // Initialize the input form field
1461                 $('#input_form_nav .input_form_nav_tab.current').each(function () {
1462                     current_tab_id = $(this).attr('id').substring('input_form_nav_'.length);
1463                     SN.U.switchInputFormTab(current_tab_id, false);
1464                 });
1465
1466                 // Make inline reply forms self-close when clicking out.
1467                 $('body').on('click', function (e) {
1468                     var openReplies = $('li.notice-reply');
1469                     if (openReplies.length > 0) {
1470                         var target = $(e.target);
1471                         openReplies.each(function () {
1472                             // Did we click outside this one?
1473                             var replyItem = $(this);
1474                             if (replyItem.has(e.target).length == 0) {
1475                                 var textarea = replyItem.find('.notice_data-text:first');
1476                                 var cur = $.trim(textarea.val());
1477                                 // Only close if there's been no edit.
1478                                 if (cur == '' || cur == textarea.data('initialText')) {
1479                                     var parentNotice = replyItem.closest('li.notice');
1480                                     replyItem.hide();
1481                                     parentNotice.find('li.notice-reply-placeholder').show();
1482                                 }
1483                             }
1484                         });
1485                     }
1486                 });
1487             }
1488         },
1489
1490         /**
1491          * Encapsulate notice form setup for a single form.
1492          * Plugins can add extra setup by monkeypatching this
1493          * function.
1494          *
1495          * @param {jQuery} form
1496          */
1497         NoticeFormSetup: function (form) {
1498             if (form.data('NoticeFormSetup')) {
1499                 return false;
1500             }
1501             SN.U.NoticeLocationAttach(form);
1502             SN.U.FormNoticeUniqueID(form);
1503             SN.U.FormNoticeXHR(form);
1504             SN.U.FormNoticeEnhancements(form);
1505             SN.U.NoticeDataAttach(form);
1506             form.data('NoticeFormSetup', true);
1507         },
1508
1509         /**
1510          * Run setup code for notice timeline views items:
1511          *
1512          * - AJAX submission for fave/repeat/reply (if logged in)
1513          * - Attachment link extras ('more' links)
1514          */
1515         Notices: function () {
1516             if ($('body.user_in').length > 0) {
1517                 SN.U.NoticeRepeat();
1518                 SN.U.NoticeReply();
1519                 SN.U.NoticeInlineReplySetup();
1520                 SN.U.NoticeOptionsAjax();
1521             }
1522
1523             SN.U.NoticeAttachments();
1524         },
1525
1526         /**
1527          * Run setup code for user & group profile page header area if logged in:
1528          *
1529          * - AJAX submission for sub/unsub/join/leave/nudge
1530          * - AJAX form popup for direct-message
1531          */
1532         EntityActions: function () {
1533             if ($('body.user_in').length > 0) {
1534                 $(document).on('click', '.form_user_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1535                 $(document).on('click', '.form_user_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1536                 $(document).on('click', '.form_group_join', function () { SN.U.FormXHR($(this)); return false; });
1537                 $(document).on('click', '.form_group_leave', function () { SN.U.FormXHR($(this)); return false; });
1538                 $(document).on('click', '.form_user_nudge', function () { SN.U.FormXHR($(this)); return false; });
1539                 $(document).on('click', '.form_peopletag_subscribe', function () { SN.U.FormXHR($(this)); return false; });
1540                 $(document).on('click', '.form_peopletag_unsubscribe', function () { SN.U.FormXHR($(this)); return false; });
1541                 $(document).on('click', '.form_user_add_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1542                 $(document).on('click', '.form_user_remove_peopletag', function () { SN.U.FormXHR($(this)); return false; });
1543
1544                 SN.U.NewDirectMessage();
1545             }
1546         },
1547
1548         ProfileSearch: function () {
1549             if ($('body.user_in').length > 0) {
1550                 $(document).on('click', '.form_peopletag_edit_user_search input.submit', function () {
1551                     SN.U.FormProfileSearchXHR($(this).parents('form')); return false;
1552                 });
1553             }
1554         },
1555
1556         /**
1557          * Run setup for the ajax people tags editor
1558          *
1559          * - show edit button
1560          * - set event handle for click on edit button
1561          *   - loads people tag autocompletion data if not already present
1562          *     or if it is stale.
1563          *
1564          */
1565         PeopleTags: function () {
1566             $('.user_profile_tags .editable').append($('<button class="peopletags_edit_button"/>'));
1567
1568             $(document).on('click', '.peopletags_edit_button', function () {
1569                 var form = $(this).parents('dd').eq(0).find('form');
1570                 // We can buy time from the above animation
1571
1572                 $.ajax({
1573                     url: _peopletagAC,
1574                     dataType: 'json',
1575                     data: {token: $('#token').val()},
1576                     ifModified: true,
1577                     success: function (data) {
1578                         // item.label is used to match
1579                         for (i=0; i < data.length; i++) {
1580                             data[i].label = data[i].tag;
1581                         }
1582
1583                         SN.C.PtagACData = data;
1584                     }
1585                 });
1586
1587                 $(this).parents('ul').eq(0).fadeOut(200, function () {form.fadeIn(200).find('input#tags')});
1588             });
1589
1590             $(document).on('click', '.user_profile_tags form .submit', function () {
1591                 SN.U.FormPeopletagsXHR($(this).parents('form')); return false;
1592             });
1593         },
1594
1595         /**
1596          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1597          */
1598         AjaxForms: function () {
1599             $(document).on('submit', 'form.ajax', function () {
1600                 SN.U.FormXHR($(this));
1601                 return false;
1602             });
1603             $(document).on('click', 'form.ajax input[type=submit]', function () {
1604                 // Some forms rely on knowing which submit button was clicked.
1605                 // Save a hidden input field which'll be picked up during AJAX
1606                 // submit...
1607                 var button = $(this);
1608                 var form = button.closest('form');
1609                 form.find('.hidden-submit-button').remove();
1610                 $('<input class="hidden-submit-button" type="hidden" />')
1611                     .attr('name', button.attr('name'))
1612                     .val(button.val())
1613                     .appendTo(form);
1614             });
1615         },
1616
1617         /**
1618          * Add logic to any file upload forms to handle file size limits,
1619          * on browsers that support basic FileAPI.
1620          */
1621         UploadForms: function () {
1622             $('input[type=file]').change(function (event) {
1623                 if (typeof this.files === "object" && this.files.length > 0) {
1624                     var size = 0;
1625                     for (var i = 0; i < this.files.length; i++) {
1626                         size += this.files[i].size;
1627                     }
1628
1629                     var max = SN.U.maxFileSize($(this.form));
1630                     if (max > 0 && size > max) {
1631                         var msg = 'File too large: maximum upload size is %d bytes.';
1632                         alert(msg.replace('%d', max));
1633
1634                         // Clear the files.
1635                         $(this).val('');
1636                         event.preventDefault();
1637                         return false;
1638                     }
1639                 }
1640             });
1641         },
1642
1643         CheckBoxes: function () {
1644             $("span[class='checkbox-wrapper']").addClass("unchecked");
1645             $(".checkbox-wrapper").click(function () {
1646                 if ($(this).children("input").prop("checked")) {
1647                     // uncheck
1648                     $(this).children("input").prop("checked", false);
1649                     $(this).removeClass("checked");
1650                     $(this).addClass("unchecked");
1651                     $(this).children("label").text("Private?");
1652                 } else {
1653                     // check
1654                     $(this).children("input").prop("checked", true);
1655                     $(this).removeClass("unchecked");
1656                     $(this).addClass("checked");
1657                     $(this).children("label").text("Private");
1658                 }
1659             });
1660         }
1661     }
1662 };
1663
1664 /**
1665  * Run initialization functions on DOM-ready.
1666  *
1667  * Note that if we're waiting on other scripts to load, this won't happen
1668  * until that's done. To load scripts asynchronously without delaying setup,
1669  * don't start them loading until after DOM-ready time!
1670  */
1671 $(function () {
1672     SN.Init.AjaxForms();
1673     SN.Init.UploadForms();
1674     SN.Init.CheckBoxes();
1675     if ($('.' + SN.C.S.FormNotice).length > 0) {
1676         SN.Init.NoticeForm();
1677     }
1678     if ($('#content .notices').length > 0) {
1679         SN.Init.Notices();
1680     }
1681     if ($('#content .entity_actions').length > 0) {
1682         SN.Init.EntityActions();
1683     }
1684     if ($('#profile_search_results').length > 0) {
1685         SN.Init.ProfileSearch();
1686     }
1687     if ($('.user_profile_tags .editable').length > 0) {
1688         SN.Init.PeopleTags();
1689     }
1690 });
1691