js/util.js

   1 /*
   2  * StatusNet - a distributed open-source microblogging tool
   3  * Copyright (C) 2008, StatusNet, Inc.
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU Affero General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU Affero General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Affero General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * @category  UI interaction
  19  * @package   StatusNet
  20  * @author    Sarven Capadisli <csarven@status.net>
  21  * @author    Evan Prodromou <evan@status.net>
  22  * @author    Brion Vibber <brion@status.net>
  23  * @copyright 2009,2010 StatusNet, Inc.
  24  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  25  * @link      http://status.net/
  26  */
  27
  28 var SN = { // StatusNet
  29     C: { // Config
  30         I: { // Init
  31             CounterBlackout: false,
  32             MaxLength: 140,
  33             PatternUsername: /^[0-9a-zA-Z\-_.]*$/,
  34             HTTP20x30x: [200, 201, 202, 203, 204, 205, 206, 300, 301, 302, 303, 304, 305, 306, 307],
  35             NoticeFormMaster: null // to be cloned from the one at top
  36         },
  37
  38         /**
  39          * @fixme are these worth the trouble? They seem to mostly just duplicate
  40          * themselves while slightly obscuring the actual selector, so it's hard
  41          * to pop over to the HTML and find something.
  42          *
  43          * In theory, minification could reduce them to shorter variable names,
  44          * but at present that doesn't happen with yui-compressor.
  45          */
  46         S: { // Selector
  47             Disabled: 'disabled',
  48             Warning: 'warning',
  49             Error: 'error',
  50             Success: 'success',
  51             Processing: 'processing',
  52             CommandResult: 'command_result',
  53             FormNotice: 'form_notice',
  54             NoticeDataGeo: 'notice_data-geo',
  55             NoticeDataGeoCookie: 'NoticeDataGeo',
  56             NoticeDataGeoSelected: 'notice_data-geo_selected',
  57             StatusNetInstance: 'StatusNetInstance'
  58         }
  59     },
  60
  61     /**
  62      * Map of localized message strings exported to script from the PHP
  63      * side via Action::getScriptMessages().
  64      *
  65      * Retrieve them via SN.msg(); this array is an implementation detail.
  66      *
  67      * @access private
  68      */
  69     messages: {},
  70
  71     /**
  72      * Grabs a localized string that's been previously exported to us
  73      * from server-side code via Action::getScriptMessages().
  74      *
  75      * @example alert(SN.msg('coolplugin-failed'));
  76      *
  77      * @param {String} key: string key name to pull from message index
  78      * @return matching localized message string
  79      */
  80     msg: function (key) {
  81         if (SN.messages[key] === undefined) {
  82             return '[' + key + ']';
  83         }
  84         return SN.messages[key];
  85     },
  86
  87     U: { // Utils
  88         /**
  89          * Setup function -- DOES NOT trigger actions immediately.
  90          *
  91          * Sets up event handlers on the new notice form.
  92          *
  93          * @param {jQuery} form: jQuery object whose first matching element is the form
  94          * @access private
  95          */
  96         FormNoticeEnhancements: function (form) {
  97             if (jQuery.data(form[0], 'ElementData') === undefined) {
  98                 var MaxLength = form.find('.count').text();
  99                 if (MaxLength === undefined) {
 100                     MaxLength = SN.C.I.MaxLength;
 101                 }
 102                 jQuery.data(form[0], 'ElementData', {MaxLength: MaxLength});
 103
 104                 SN.U.Counter(form);
 105
 106                 var NDT = form.find('.notice_data-text:first');
 107
 108                 NDT.on('keyup', function (e) {
 109                     SN.U.Counter(form);
 110                 });
 111
 112                 var delayedUpdate = function (e) {
 113                     // Cut and paste events fire *before* the operation,
 114                     // so we need to trigger an update in a little bit.
 115                     // This would be so much easier if the 'change' event
 116                     // actually fired every time the value changed. :P
 117                     window.setTimeout(function () {
 118                         SN.U.Counter(form);
 119                     }, 50);
 120                 };
 121                 // Note there's still no event for mouse-triggered 'delete'.
 122                 NDT.on('cut', delayedUpdate)
 123                     .on('paste', delayedUpdate);
 124             } else {
 125                 form.find('.count').text(jQuery.data(form[0], 'ElementData').MaxLength);
 126             }
 127         },
 128
 129         /**
 130          * To be called from event handlers on the notice import form.
 131          * Triggers an update of the remaining-characters counter.
 132          *
 133          * Additional counter updates will be suppressed during the
 134          * next half-second to avoid flooding the layout engine with
 135          * updates, followed by another automatic check.
 136          *
 137          * The maximum length is pulled from data established by
 138          * FormNoticeEnhancements.
 139          *
 140          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 141          * @access private
 142          */
 143         Counter: function (form) {
 144             SN.C.I.FormNoticeCurrent = form;
 145
 146             var MaxLength = jQuery.data(form[0], 'ElementData').MaxLength;
 147
 148             if (MaxLength <= 0) {
 149                 return;
 150             }
 151
 152             var remaining = MaxLength - SN.U.CharacterCount(form);
 153             var counter = form.find('.count');
 154
 155             if (remaining.toString() != counter.text()) {
 156                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 157                     if (counter.text() != String(remaining)) {
 158                         counter.text(remaining);
 159                     }
 160                     if (remaining < 0) {
 161                         form.addClass(SN.C.S.Warning);
 162                     } else {
 163                         form.removeClass(SN.C.S.Warning);
 164                     }
 165                     // Skip updates for the next 500ms.
 166                     // On slower hardware, updating on every keypress is unpleasant.
 167                     if (!SN.C.I.CounterBlackout) {
 168                         SN.C.I.CounterBlackout = true;
 169                         SN.C.I.FormNoticeCurrent = form;
 170                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 171                     }
 172                 }
 173             }
 174         },
 175
 176         /**
 177          * Pull the count of characters in the current edit field.
 178          * Plugins replacing the edit control may need to override this.
 179          *
 180          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 181          * @return number of chars
 182          */
 183         CharacterCount: function (form) {
 184             return form.find('.notice_data-text:first').val().length;
 185         },
 186
 187         /**
 188          * Called internally after the counter update blackout period expires;
 189          * runs another update to make sure we didn't miss anything.
 190          *
 191          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 192          * @access private
 193          */
 194         ClearCounterBlackout: function (form) {
 195             // Allow keyup events to poke the counter again
 196             SN.C.I.CounterBlackout = false;
 197             // Check if the string changed since we last looked
 198             SN.U.Counter(form);
 199         },
 200
 201         /**
 202          * Helper function to rewrite default HTTP form action URLs to HTTPS
 203          * so we can actually fetch them when on an SSL page in ssl=sometimes
 204          * mode.
 205          *
 206          * It would be better to output URLs that didn't hardcode protocol
 207          * and hostname in the first place...
 208          *
 209          * @param {String} url
 210          * @return string
 211          */
 212         RewriteAjaxAction: function (url) {
 213             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 214             if (document.location.protocol === 'https:' && url.substr(0, 5) === 'http:') {
 215                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 216             }
 217             return url;
 218         },
 219
 220         /**
 221          * Grabs form data and submits it asynchronously, with 'ajax=1'
 222          * parameter added to the rest.
 223          *
 224          * If a successful response includes another form, that form
 225          * will be extracted and copied in, replacing the original form.
 226          * If there's no form, the first paragraph will be used.
 227          *
 228          * This will automatically be applied on the 'submit' event for
 229          * any form with the 'ajax' class.
 230          *
 231          * @fixme can sometimes explode confusingly if returnd data is bogus
 232          * @fixme error handling is pretty vague
 233          * @fixme can't submit file uploads
 234          *
 235          * @param {jQuery} form: jQuery object whose first element is a form
 236          * @param function onSuccess: something extra to do on success
 237          *
 238          * @access public
 239          */
 240         FormXHR: function (form, onSuccess) {
 241             $.ajax({
 242                 type: 'POST',
 243                 dataType: 'xml',
 244                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 245                 data: form.serialize() + '&ajax=1',
 246                 beforeSend: function (xhr) {
 247                     form
 248                         .addClass(SN.C.S.Processing)
 249                         .find('.submit')
 250                             .addClass(SN.C.S.Disabled)
 251                             .prop(SN.C.S.Disabled, true);
 252                 },
 253                 error: function (xhr, textStatus, errorThrown) {
 254                     // If the server end reported an error from StatusNet,
 255                     // find it -- otherwise we'll see what was reported
 256                     // from the browser.
 257                     var errorReported = null;
 258                     if (xhr.responseXML) {
 259                         errorReported = $('#error', xhr.responseXML).text();
 260                     }
 261                     window.alert(errorReported || errorThrown || textStatus);
 262
 263                     // Restore the form to original state.
 264                     // Hopefully. :D
 265                     form
 266                         .removeClass(SN.C.S.Processing)
 267                         .find('.submit')
 268                             .removeClass(SN.C.S.Disabled)
 269                             .prop(SN.C.S.Disabled, false);
 270                 },
 271                 success: function (data, textStatus) {
 272                     if ($('form', data)[0] !== undefined) {
 273                         var form_new = document._importNode($('form', data)[0], true);
 274                         form.replaceWith(form_new);
 275                         if (onSuccess) {
 276                             onSuccess();
 277                         }
 278                     } else if ($('p', data)[0] !== undefined) {
 279                         form.replaceWith(document._importNode($('p', data)[0], true));
 280                         if (onSuccess) {
 281                             onSuccess();
 282                         }
 283                     } else {
 284                         window.alert('Unknown error.');
 285                     }
 286                 }
 287             });
 288         },
 289
 290         /**
 291          * Setup function -- DOES NOT trigger actions immediately.
 292          *
 293          * Sets up event handlers for special-cased async submission of the
 294          * notice-posting form, including some pre-post validation.
 295          *
 296          * Unlike FormXHR() this does NOT submit the form immediately!
 297          * It sets up event handlers so that any method of submitting the
 298          * form (click on submit button, enter, submit() etc) will trigger
 299          * it properly.
 300          *
 301          * Also unlike FormXHR(), this system will use a hidden iframe
 302          * automatically to handle file uploads via <input type="file">
 303          * controls.
 304          *
 305          * @fixme tl;dr
 306          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 307          * @fixme error handling is unreliable
 308          * @fixme cookieValue is a global variable, but probably shouldn't be
 309          * @fixme saving the location cache cookies should be split out
 310          * @fixme some error messages are hardcoded english: needs i18n
 311          *
 312          * @param {jQuery} form: jQuery object whose first element is a form
 313          *
 314          * @access public
 315          */
 316         FormNoticeXHR: function (form) {
 317             SN.C.I.NoticeDataGeo = {};
 318             form.append('<input type="hidden" name="ajax" value="1"/>');
 319
 320             // Make sure we don't have a mixed HTTP/HTTPS submission...
 321             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 322
 323             /**
 324              * Show a response feedback bit under the new-notice dialog.
 325              *
 326              * @param {String} cls: CSS class name to use ('error' or 'success')
 327              * @param {String} text
 328              * @access private
 329              */
 330             var showFeedback = function (cls, text) {
 331                 form.append(
 332                     $('<p class="form_response"></p>')
 333                         .addClass(cls)
 334                         .text(text)
 335                 );
 336             };
 337
 338             /**
 339              * Hide the previous response feedback, if any.
 340              */
 341             var removeFeedback = function () {
 342                 form.find('.form_response').remove();
 343             };
 344
 345             form.ajaxForm({
 346                 dataType: 'xml',
 347                 timeout: '60000',
 348                 beforeSend: function (formData) {
 349                     if (form.find('.notice_data-text:first').val() == '') {
 350                         form.addClass(SN.C.S.Warning);
 351                         return false;
 352                     }
 353                     form
 354                         .addClass(SN.C.S.Processing)
 355                         .find('.submit')
 356                             .addClass(SN.C.S.Disabled)
 357                             .prop(SN.C.S.Disabled, true);
 358
 359                     SN.U.normalizeGeoData(form);
 360
 361                     return true;
 362                 },
 363                 error: function (xhr, textStatus, errorThrown) {
 364                     form
 365                         .removeClass(SN.C.S.Processing)
 366                         .find('.submit')
 367                             .removeClass(SN.C.S.Disabled)
 368                             .prop(SN.C.S.Disabled, false);
 369                     removeFeedback();
 370                     if (textStatus == 'timeout') {
 371                         // @fixme i18n
 372                         showFeedback('error', 'Sorry! We had trouble sending your notice. The servers are overloaded. Please try again, and contact the site administrator if this problem persists.');
 373                     } else {
 374                         var response = SN.U.GetResponseXML(xhr);
 375                         if ($('.' + SN.C.S.Error, response).length > 0) {
 376                             form.append(document._importNode($('.' + SN.C.S.Error, response)[0], true));
 377                         } else {
 378                             if (parseInt(xhr.status) === 0 || jQuery.inArray(parseInt(xhr.status), SN.C.I.HTTP20x30x) >= 0) {
 379                                 form
 380                                     .resetForm()
 381                                     .find('.attach-status').remove();
 382                                 SN.U.FormNoticeEnhancements(form);
 383                             } else {
 384                                 // @fixme i18n
 385                                 showFeedback('error', '(Sorry! We had trouble sending your notice (' + xhr.status + ' ' + xhr.statusText + '). Please report the problem to the site administrator if this happens again.');
 386                             }
 387                         }
 388                     }
 389                 },
 390                 success: function (data, textStatus) {
 391                     removeFeedback();
 392                     var errorResult = $('#' + SN.C.S.Error, data);
 393                     if (errorResult.length > 0) {
 394                         showFeedback('error', errorResult.text());
 395                     } else {
 396                         var commandResult = $('#' + SN.C.S.CommandResult, data);
 397                         if (commandResult.length > 0) {
 398                             showFeedback('success', commandResult.text());
 399                         } else {
 400                             // New notice post was successful. If on our timeline, show it!
 401                             var notice = document._importNode($('li', data)[0], true);
 402                             var notices = $('#notices_primary .notices:first');
 403                             var replyItem = form.closest('li.notice-reply');
 404
 405                             if (replyItem.length > 0) {
 406                                 // If this is an inline reply, remove the form...
 407                                 var list = form.closest('.threaded-replies');
 408                                 var placeholder = list.find('.notice-reply-placeholder');
 409                                 replyItem.remove();
 410
 411                                 var id = $(notice).attr('id');
 412                                 if ($('#' + id).length == 0) {
 413                                     $(notice).insertBefore(placeholder);
 414                                 } // else Realtime came through before us...
 415
 416                                 // ...and show the placeholder form.
 417                                 placeholder.show();
 418                             } else if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
 419                                 // Not a reply. If on our timeline, show it at the top!
 420
 421                                 if ($('#' + notice.id).length === 0) {
 422                                     var notice_irt_value = form.find('[name=inreplyto]').val();
 423                                     var notice_irt = '#notices_primary #notice-' + notice_irt_value;
 424                                     if ($('body')[0].id == 'conversation') {
 425                                         if (notice_irt_value.length > 0 && $(notice_irt + ' .notices').length < 1) {
 426                                             $(notice_irt).append('<ul class="notices"></ul>');
 427                                         }
 428                                         $($(notice_irt + ' .notices')[0]).append(notice);
 429                                     } else {
 430                                         notices.prepend(notice);
 431                                     }
 432                                     $('#' + notice.id)
 433                                         .css({display: 'none'})
 434                                         .fadeIn(2500);
 435                                     SN.U.NoticeWithAttachment($('#' + notice.id));
 436                                     SN.U.switchInputFormTab("placeholder");
 437                                 }
 438                             } else {
 439                                 // Not on a timeline that this belongs on?
 440                                 // Just show a success message.
 441                                 // @fixme inline
 442                                 showFeedback('success', $('title', data).text());
 443                             }
 444                         }
 445                         form.resetForm();
 446                         form.find('[name=inreplyto]').val('');
 447                         form.find('.attach-status').remove();
 448                         SN.U.FormNoticeEnhancements(form);
 449                     }
 450                 },
 451                 complete: function (xhr, textStatus) {
 452                     form
 453                         .removeClass(SN.C.S.Processing)
 454                         .find('.submit')
 455                             .prop(SN.C.S.Disabled, false)
 456                             .removeClass(SN.C.S.Disabled);
 457
 458                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 459                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 460                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 461                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 462                     form.find('[name=notice_data-geo]').prop('checked', SN.C.I.NoticeDataGeo.NDG);
 463                 }
 464             });
 465         },
 466
 467         FormProfileSearchXHR: function (form) {
 468             $.ajax({
 469                 type: 'POST',
 470                 dataType: 'xml',
 471                 url: form.attr('action'),
 472                 data: form.serialize() + '&ajax=1',
 473                 beforeSend: function (xhr) {
 474                     form
 475                         .addClass(SN.C.S.Processing)
 476                         .find('.submit')
 477                             .addClass(SN.C.S.Disabled)
 478                             .prop(SN.C.S.Disabled, true);
 479                 },
 480                 error: function (xhr, textStatus, errorThrown) {
 481                     window.alert(errorThrown || textStatus);
 482                 },
 483                 success: function (data, textStatus) {
 484                     var results_placeholder = $('#profile_search_results');
 485                     if ($('ul', data)[0] !== undefined) {
 486                         var list = document._importNode($('ul', data)[0], true);
 487                         results_placeholder.replaceWith(list);
 488                     } else {
 489                         var _error = $('<li/>').append(document._importNode($('p', data)[0], true));
 490                         results_placeholder.html(_error);
 491                     }
 492                     form
 493                         .removeClass(SN.C.S.Processing)
 494                         .find('.submit')
 495                             .removeClass(SN.C.S.Disabled)
 496                             .prop(SN.C.S.Disabled, false);
 497                 }
 498             });
 499         },
 500
 501         FormPeopletagsXHR: function (form) {
 502             $.ajax({
 503                 type: 'POST',
 504                 dataType: 'xml',
 505                 url: form.attr('action'),
 506                 data: form.serialize() + '&ajax=1',
 507                 beforeSend: function (xhr) {
 508                     form.find('.submit')
 509                             .addClass(SN.C.S.Processing)
 510                             .addClass(SN.C.S.Disabled)
 511                             .prop(SN.C.S.Disabled, true);
 512                 },
 513                 error: function (xhr, textStatus, errorThrown) {
 514                     window.alert(errorThrown || textStatus);
 515                 },
 516                 success: function (data, textStatus) {
 517                     var results_placeholder = form.parents('.entity_tags');
 518                     if ($('.entity_tags', data)[0] !== undefined) {
 519                         var tags = document._importNode($('.entity_tags', data)[0], true);
 520                         $(tags).find('.editable').append($('<button class="peopletags_edit_button"/>'));
 521                         results_placeholder.replaceWith(tags);
 522                     } else {
 523                         results_placeholder.find('p').remove();
 524                         results_placeholder.append(document._importNode($('p', data)[0], true));
 525                         form.removeClass(SN.C.S.Processing)
 526                             .find('.submit')
 527                                 .removeClass(SN.C.S.Disabled)
 528                                 .prop(SN.C.S.Disabled, false);
 529                     }
 530                 }
 531             });
 532         },
 533
 534         normalizeGeoData: function (form) {
 535             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 536             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 537             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 538             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 539             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked'); // @fixme (does this still need to be fixed somehow?)
 540
 541             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 542
 543             if (cookieValue !== undefined && cookieValue != 'disabled') {
 544                 cookieValue = JSON.parse(cookieValue);
 545                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 546                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 547                 if (cookieValue.NLNS) {
 548                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 549                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 550                 } else {
 551                     form.find('[name=location_ns]').val('');
 552                     form.find('[name=location_id]').val('');
 553                 }
 554             }
 555             if (cookieValue == 'disabled') {
 556                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', false).prop('checked');
 557             } else {
 558                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').prop('checked', true).prop('checked');
 559             }
 560
 561         },
 562
 563         /**
 564          * Fetch an XML DOM from an XHR's response data.
 565          *
 566          * Works around unavailable responseXML when document.domain
 567          * has been modified by Meteor or other tools, in some but not
 568          * all browsers.
 569          *
 570          * @param {XMLHTTPRequest} xhr
 571          * @return DOMDocument
 572          */
 573         GetResponseXML: function (xhr) {
 574             try {
 575                 return xhr.responseXML;
 576             } catch (e) {
 577                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 578             }
 579         },
 580
 581         /**
 582          * Setup function -- DOES NOT trigger actions immediately.
 583          *
 584          * Sets up event handlers on all visible notice's reply buttons to
 585          * tweak the new-notice form with needed variables and focus it
 586          * when pushed.
 587          *
 588          * (This replaces the default reply button behavior to submit
 589          * directly to a form which comes back with a specialized page
 590          * with the form data prefilled.)
 591          *
 592          * @access private
 593          */
 594         NoticeReply: function () {
 595             $(document).on('click', '#content .notice_reply', function (e) {
 596                 e.preventDefault();
 597                 var notice = $(this).closest('li.notice');
 598                 SN.U.NoticeInlineReplyTrigger(notice);
 599                 return false;
 600             });
 601         },
 602
 603         /**
 604          * Stub -- kept for compat with plugins for now.
 605          * @access private
 606          */
 607         NoticeReplyTo: function (notice) {
 608         },
 609
 610         /**
 611          * Open up a notice's inline reply box.
 612          *
 613          * @param {jQuery} notice: jQuery object containing one notice
 614          * @param {String} initialText
 615          */
 616         NoticeInlineReplyTrigger: function (notice, initialText) {
 617             // Find the notice we're replying to...
 618             var id = $($('.notice_id', notice)[0]).text();
 619             var replyForm, placeholder;
 620             var parentNotice = notice;
 621             var stripForm = true; // strip a couple things out of reply forms that are inline
 622
 623             // Find the threaded replies view we'll be adding to...
 624             var list = notice.closest('.notices');
 625             if (list.closest('.old-school').length) {
 626                 // We're replying to an old-school conversation thread;
 627                 // use the old-style ping into the top form.
 628                 SN.U.switchInputFormTab("status");
 629                 replyForm = $('#input_form_status').find('form');
 630                 stripForm = false;
 631             } else if (list.hasClass('threaded-replies')) {
 632                 // We're replying to a reply; use reply form on the end of this list.
 633                 // We'll add our form at the end of this; grab the root notice.
 634                 parentNotice = list.closest('.notice');
 635
 636                 // See if the form's already open...
 637                 replyForm = $('.notice-reply-form', list);
 638             } else {
 639                 // We're replying to a parent notice; pull its threaded list
 640                 // and we'll add on the end of it. Will add if needed.
 641                 list = $('ul.threaded-replies', notice);
 642                 if (list.length == 0) {
 643                     SN.U.NoticeInlineReplyPlaceholder(notice);
 644                     list = $('ul.threaded-replies', notice);
 645                 } else {
 646                     placeholder = $('li.notice-reply-placeholder', notice);
 647                     if (placeholder.length == 0) {
 648                         SN.U.NoticeInlineReplyPlaceholder(notice);
 649                     }
 650                 }
 651
 652                 // See if the form's already open...
 653                 replyForm = $('.notice-reply-form', list);
 654             }
 655
 656             var nextStep = function () {
 657                 // Override...?
 658                 replyForm.find('input[name=inreplyto]').val(id);
 659                 if (stripForm) {
 660                     // Don't do this for old-school reply form, as they don't come back!
 661                     replyForm.find('#notice_to').prop('disabled', true).hide();
 662                     replyForm.find('#notice_private').prop('disabled', true).hide();
 663                     replyForm.find('label[for=notice_to]').hide();
 664                     replyForm.find('label[for=notice_private]').hide();
 665                 }
 666
 667                 // Set focus...
 668                 var text = replyForm.find('textarea');
 669                 if (text.length == 0) {
 670                     throw "No textarea";
 671                 }
 672                 var replyto = '';
 673                 if (initialText) {
 674                     replyto = initialText + ' ';
 675                 }
 676                 text.val(replyto + text.val().replace(new RegExp(replyto, 'i'), ''));
 677                 text.data('initialText', $.trim(initialText));
 678                 text.focus();
 679                 if (text[0].setSelectionRange) {
 680                     var len = text.val().length;
 681                     text[0].setSelectionRange(len, len);
 682                 }
 683             };
 684             if (replyForm.length > 0) {
 685                 // Update the existing form...
 686                 nextStep();
 687             } else {
 688                 // Hide the placeholder...
 689                 placeholder = list.find('li.notice-reply-placeholder').hide();
 690
 691                 // Create the reply form entry at the end
 692                 var replyItem = $('li.notice-reply', list);
 693                 if (replyItem.length == 0) {
 694                     replyItem = $('<li class="notice-reply"></li>');
 695
 696                     var intermediateStep = function (formMaster) {
 697                         var formEl = document._importNode(formMaster, true);
 698                         replyItem.append(formEl);
 699                         list.append(replyItem); // *after* the placeholder
 700
 701                         var form = $(formEl);
 702                         replyForm = form;
 703                         SN.Init.NoticeFormSetup(form);
 704
 705                         nextStep();
 706                     };
 707                     if (SN.C.I.NoticeFormMaster) {
 708                         // We've already saved a master copy of the form.
 709                         // Clone it in!
 710                         intermediateStep(SN.C.I.NoticeFormMaster);
 711                     } else {
 712                         // Fetch a fresh copy of the notice form over AJAX.
 713                         // Warning: this can have a delay, which looks bad.
 714                         // @fixme this fallback may or may not work
 715                         var url = $('#form_notice').attr('action');
 716                         $.get(url, {ajax: 1}, function (data, textStatus, xhr) {
 717                             intermediateStep($('form', data)[0]);
 718                         });
 719                     }
 720                 }
 721             }
 722         },
 723
 724         NoticeInlineReplyPlaceholder: function (notice) {
 725             var list = notice.find('ul.threaded-replies');
 726             if (list.length == 0) {
 727                 list = $('<ul class="notices threaded-replies xoxo"></ul>');
 728                 notice.append(list);
 729                 list = notice.find('ul.threaded-replies');
 730             }
 731             var placeholder = $('<li class="notice-reply-placeholder">' +
 732                                     '<input class="placeholder" />' +
 733                                 '</li>');
 734             placeholder.find('input')
 735                 .val(SN.msg('reply_placeholder'));
 736             list.append(placeholder);
 737         },
 738
 739         /**
 740          * Setup function -- DOES NOT apply immediately.
 741          *
 742          * Sets up event handlers for inline reply mini-form placeholders.
 743          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 744          */
 745         NoticeInlineReplySetup: function () {
 746             $('li.notice-reply-placeholder input')
 747                 .on('focus', function () {
 748                     var notice = $(this).closest('li.notice');
 749                     SN.U.NoticeInlineReplyTrigger(notice);
 750                     return false;
 751                 });
 752             $(document).on('click', 'li.notice-reply-comments a', function () {
 753                     var url = $(this).attr('href');
 754                     var area = $(this).closest('.threaded-replies');
 755                     $.get(url, {ajax: 1}, function (data, textStatus, xhr) {
 756                         var replies = $('.threaded-replies', data);
 757                         if (replies.length) {
 758                             area.replaceWith(document._importNode(replies[0], true));
 759                         }
 760                     });
 761                     return false;
 762                 });
 763         },
 764
 765         /**
 766          * Setup function -- DOES NOT trigger actions immediately.
 767          *
 768          * Sets up event handlers for repeat forms to toss up a confirmation
 769          * popout before submitting.
 770          *
 771          * Uses 'on' rather than 'live' or 'bind', so applies to future as well as present items.
 772          *
 773          */
 774         NoticeRepeat: function () {
 775             $('body').on('click', '.form_repeat', function (e) {
 776                 e.preventDefault();
 777
 778                 SN.U.NoticeRepeatConfirmation($(this));
 779                 return false;
 780             });
 781         },
 782
 783         /**
 784          * Shows a confirmation dialog box variant of the repeat button form.
 785          * This seems to use a technique where the repeat form contains
 786          * _both_ a standalone button _and_ text and buttons for a dialog.
 787          * The dialog will close after its copy of the form is submitted,
 788          * or if you click its 'close' button.
 789          *
 790          * The dialog is created by duplicating the original form and changing
 791          * its style; while clever, this is hard to generalize and probably
 792          * duplicates a lot of unnecessary HTML output.
 793          *
 794          * @fixme create confirmation dialogs through a generalized interface
 795          * that can be reused instead of hardcoded text and styles.
 796          *
 797          * @param {jQuery} form
 798          */
 799         NoticeRepeatConfirmation: function (form) {
 800             var submit_i = form.find('.submit');
 801
 802             var submit = submit_i.clone();
 803             submit
 804                 .addClass('submit_dialogbox')
 805                 .removeClass('submit');
 806             form.append(submit);
 807             submit.on('click', function () { SN.U.FormXHR(form); return false; });
 808
 809             submit_i.hide();
 810
 811             form
 812                 .addClass('dialogbox')
 813                 .append('<button class="close">&#215;</button>')
 814                 .closest('.notice-options')
 815                     .addClass('opaque');
 816
 817             form.find('button.close').click(function () {
 818                 $(this).remove();
 819
 820                 form
 821                     .removeClass('dialogbox')
 822                     .closest('.notice-options')
 823                         .removeClass('opaque');
 824
 825                 form.find('.submit_dialogbox').remove();
 826                 form.find('.submit').show();
 827
 828                 return false;
 829             });
 830         },
 831
 832         /**
 833          * Setup function -- DOES NOT trigger actions immediately.
 834          *
 835          * Goes through all notices currently displayed and sets up attachment
 836          * handling if needed.
 837          */
 838         NoticeAttachments: function () {
 839             $('.notice a.attachment').each(function () {
 840                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 841             });
 842         },
 843
 844         /**
 845          * Setup function -- DOES NOT trigger actions immediately.
 846          *
 847          * Sets up special attachment link handling if needed. Currently this
 848          * consists only of making the "more" button used for OStatus message
 849          * cropping turn into an auto-expansion button that loads the full
 850          * text from an attachment file.
 851          *
 852          * @param {jQuery} notice
 853          */
 854         NoticeWithAttachment: function (notice) {
 855             if (notice.find('.attachment').length === 0) {
 856                 return;
 857             }
 858
 859             var attachment_more = notice.find('.attachment.more');
 860             if (attachment_more.length > 0) {
 861                 $(attachment_more[0]).click(function () {
 862                     var m = $(this);
 863                     m.addClass(SN.C.S.Processing);
 864                     $.get(m.attr('href'), {ajax: 1}, function (data) {
 865                         m.parent('.e-content').html($(data).find('#attachment_view .e-content').html());
 866                     });
 867
 868                     return false;
 869                 }).attr('title', SN.msg('showmore_tooltip'));
 870             }
 871         },
 872
 873         /**
 874          * Setup function -- DOES NOT trigger actions immediately.
 875          *
 876          * Sets up event handlers for the file-attachment widget in the
 877          * new notice form. When a file is selected, a box will be added
 878          * below the text input showing the filename and, if supported
 879          * by the browser, a thumbnail preview.
 880          *
 881          * This preview box will also allow removing the attachment
 882          * prior to posting.
 883          *
 884          * @param {jQuery} form
 885          */
 886         NoticeDataAttach: function (form) {
 887             var i;
 888             var NDA = form.find('input[type=file]');
 889             NDA.change(function (event) {
 890                 form.find('.attach-status').remove();
 891
 892                 var filename = $(this).val();
 893                 if (!filename) {
 894                     // No file -- we've been tricked!
 895                     return false;
 896                 }
 897
 898                 var attachStatus = $('<div class="attach-status ' + SN.C.S.Success + '"><code></code> <button class="close">&#215;</button></div>');
 899                 attachStatus.find('code').text(filename);
 900                 attachStatus.find('button').click(function () {
 901                     attachStatus.remove();
 902                     NDA.val('');
 903
 904                     return false;
 905                 });
 906                 form.append(attachStatus);
 907
 908                 if (typeof this.files === "object") {
 909                     // Some newer browsers will let us fetch the files for preview.
 910                     for (i = 0; i < this.files.length; i++) {
 911                         SN.U.PreviewAttach(form, this.files[i]);
 912                     }
 913                 }
 914             });
 915         },
 916
 917         /**
 918          * Get PHP's MAX_FILE_SIZE setting for this form;
 919          * used to apply client-side file size limit checks.
 920          *
 921          * @param {jQuery} form
 922          * @return int max size in bytes; 0 or negative means no limit
 923          */
 924         maxFileSize: function (form) {
 925             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 926             if (max) {
 927                 return parseInt(max);
 928             }
 929             return 0;
 930         },
 931
 932         /**
 933          * For browsers with FileAPI support: make a thumbnail if possible,
 934          * and append it into the attachment display widget.
 935          *
 936          * Known good:
 937          * - Firefox 3.6.6, 4.0b7
 938          * - Chrome 8.0.552.210
 939          *
 940          * Known ok metadata, can't get contents:
 941          * - Safari 5.0.2
 942          *
 943          * Known fail:
 944          * - Opera 10.63, 11 beta (no input.files interface)
 945          *
 946          * @param {jQuery} form
 947          * @param {File} file
 948          *
 949          * @todo use configured thumbnail size
 950          * @todo detect pixel size?
 951          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 952          */
 953         PreviewAttach: function (form, file) {
 954             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 955             var preview = true;
 956
 957             var blobAsDataURL;
 958             if (window.createObjectURL !== undefined) {
 959                 /**
 960                  * createObjectURL lets us reference the file directly from an <img>
 961                  * This produces a compact URL with an opaque reference to the file,
 962                  * which we can reference immediately.
 963                  *
 964                  * - Firefox 3.6.6: no
 965                  * - Firefox 4.0b7: no
 966                  * - Safari 5.0.2: no
 967                  * - Chrome 8.0.552.210: works!
 968                  */
 969                 blobAsDataURL = function (blob, callback) {
 970                     callback(window.createObjectURL(blob));
 971                 };
 972             } else if (window.FileReader !== undefined) {
 973                 /**
 974                  * FileAPI's FileReader can build a data URL from a blob's contents,
 975                  * but it must read the file and build it asynchronously. This means
 976                  * we'll be passing a giant data URL around, which may be inefficient.
 977                  *
 978                  * - Firefox 3.6.6: works!
 979                  * - Firefox 4.0b7: works!
 980                  * - Safari 5.0.2: no
 981                  * - Chrome 8.0.552.210: works!
 982                  */
 983                 blobAsDataURL = function (blob, callback) {
 984                     var reader = new FileReader();
 985                     reader.onload = function (event) {
 986                         callback(reader.result);
 987                     };
 988                     reader.readAsDataURL(blob);
 989                 };
 990             } else {
 991                 preview = false;
 992             }
 993
 994             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 995             if ($.inArray(file.type, imageTypes) == -1) {
 996                 // We probably don't know how to show the file.
 997                 preview = false;
 998             }
 999
1000             var maxSize = 8 * 1024 * 1024;
1001             if (file.size > maxSize) {
1002                 // Don't kill the browser trying to load some giant image.
1003                 preview = false;
1004             }
1005
1006             if (preview) {
1007                 blobAsDataURL(file, function (url) {
1008                     var img = $('<img>')
1009                         .attr('title', tooltip)
1010                         .attr('alt', tooltip)
1011                         .attr('src', url)
1012                         .attr('style', 'height: 120px');
1013                     form.find('.attach-status').append(img);
1014                 });
1015             } else {
1016                 var img = $('<div></div>').text(tooltip);
1017                 form.find('.attach-status').append(img);
1018             }
1019         },
1020
1021         /**
1022          * Setup function -- DOES NOT trigger actions immediately.
1023          *
1024          * Initializes state for the location-lookup features in the
1025          * new-notice form. Seems to set up some event handlers for
1026          * triggering lookups and using the new values.
1027          *
1028          * @param {jQuery} form
1029          *
1030          * @fixme tl;dr
1031          * @fixme there's not good visual state update here, so users have a
1032          *        hard time figuring out if it's working or fixing if it's wrong.
1033          *
1034          */
1035         NoticeLocationAttach: function (form) {
1036             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
1037             var NLat = form.find('[name=lat]');
1038             var NLon = form.find('[name=lon]');
1039             var NLNS = form.find('[name=location_ns]').val();
1040             var NLID = form.find('[name=location_id]').val();
1041             var NLN = ''; // @fixme
1042             var NDGe = form.find('[name=notice_data-geo]');
1043             var check = form.find('[name=notice_data-geo]');
1044             var label = form.find('label.notice_data-geo');
1045
1046             function removeNoticeDataGeo(error) {
1047                 label
1048                     .attr('title', jQuery.trim(label.text()))
1049                     .removeClass('checked');
1050
1051                 form.find('[name=lat]').val('');
1052                 form.find('[name=lon]').val('');
1053                 form.find('[name=location_ns]').val('');
1054                 form.find('[name=location_id]').val('');
1055                 form.find('[name=notice_data-geo]').prop('checked', false);
1056
1057                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1058
1059                 if (error) {
1060                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1061                     form.find('.geo_status_wrapper .geo_status').text(error);
1062                 } else {
1063                     form.find('.geo_status_wrapper').remove();
1064                 }
1065             }
1066
1067             function getJSONgeocodeURL(geocodeURL, data) {
1068                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1069                 $.getJSON(geocodeURL, data, function (location) {
1070                     var lns, lid, NLN_text;
1071
1072                     if (location.location_ns !== undefined) {
1073                         form.find('[name=location_ns]').val(location.location_ns);
1074                         lns = location.location_ns;
1075                     }
1076
1077                     if (location.location_id !== undefined) {
1078                         form.find('[name=location_id]').val(location.location_id);
1079                         lid = location.location_id;
1080                     }
1081
1082                     if (location.name === undefined) {
1083                         NLN_text = data.lat + ';' + data.lon;
1084                     } else {
1085                         NLN_text = location.name;
1086                     }
1087
1088                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1089                     label
1090                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1091
1092                     form.find('[name=lat]').val(data.lat);
1093                     form.find('[name=lon]').val(data.lon);
1094                     form.find('[name=location_ns]').val(lns);
1095                     form.find('[name=location_id]').val(lid);
1096                     form.find('[name=notice_data-geo]').prop('checked', true);
1097
1098                     var cookieValue = {
1099                         NLat: data.lat,
1100                         NLon: data.lon,
1101                         NLNS: lns,
1102                         NLID: lid,
1103                         NLN: NLN_text,
1104                         NLNU: location.url,
1105                         NDG: true
1106                     };
1107
1108                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1109                 });
1110             }
1111
1112             if (check.length > 0) {
1113                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1114                     check.prop('checked', false);
1115                 } else {
1116                     check.prop('checked', true);
1117                 }
1118
1119                 var NGW = form.find('.notice_data-geo_wrap');
1120                 var geocodeURL = NGW.attr('data-api');
1121
1122                 label.attr('title', label.text());
1123
1124                 check.change(function () {
1125                     if (check.prop('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1126                         label
1127                             .attr('title', NoticeDataGeo_text.ShareDisable)
1128                             .addClass('checked');
1129
1130                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1131                             if (navigator.geolocation) {
1132                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1133                                 navigator.geolocation.getCurrentPosition(
1134                                     function (position) {
1135                                         form.find('[name=lat]').val(position.coords.latitude);
1136                                         form.find('[name=lon]').val(position.coords.longitude);
1137
1138                                         var data = {
1139                                             lat: position.coords.latitude,
1140                                             lon: position.coords.longitude,
1141                                             token: $('#token').val()
1142                                         };
1143
1144                                         getJSONgeocodeURL(geocodeURL, data);
1145                                     },
1146
1147                                     function (error) {
1148                                         switch(error.code) {
1149                                             case error.PERMISSION_DENIED:
1150                                                 removeNoticeDataGeo('Location permission denied.');
1151                                                 break;
1152                                             case error.TIMEOUT:
1153                                                 //$('#' + SN.C.S.NoticeDataGeo).prop('checked', false);
1154                                                 removeNoticeDataGeo('Location lookup timeout.');
1155                                                 break;
1156                                         }
1157                                     },
1158
1159                                     {
1160                                         timeout: 10000
1161                                     }
1162                                 );
1163                             } else {
1164                                 if (NLat.length > 0 && NLon.length > 0) {
1165                                     var data = {
1166                                         lat: NLat,
1167                                         lon: NLon,
1168                                         token: $('#token').val()
1169                                     };
1170
1171                                     getJSONgeocodeURL(geocodeURL, data);
1172                                 } else {
1173                                     removeNoticeDataGeo();
1174                                     check.remove();
1175                                     label.remove();
1176                                 }
1177                             }
1178                         } else {
1179                             try {
1180                                 var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1181
1182                                 form.find('[name=lat]').val(cookieValue.NLat);
1183                                 form.find('[name=lon]').val(cookieValue.NLon);
1184                                 form.find('[name=location_ns]').val(cookieValue.NLNS);
1185                                 form.find('[name=location_id]').val(cookieValue.NLID);
1186                                 form.find('[name=notice_data-geo]').prop('checked', cookieValue.NDG);
1187
1188                                SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1189                                 label
1190                                     .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1191                                     .addClass('checked');
1192                             } catch (e) {
1193                                 console.log('Parsing error:', e);
1194                             }
1195                         }
1196                     } else {
1197                         removeNoticeDataGeo();
1198                     }
1199                 }).change();
1200             }
1201         },
1202
1203         /**
1204          * Create or update a geolocation status widget in this notice posting form.
1205          *
1206          * @param {jQuery} form
1207          * @param {String} status
1208          * @param {String} lat (optional)
1209          * @param {String} lon (optional)
1210          * @param {String} url (optional)
1211          */
1212         NoticeGeoStatus: function (form, status, lat, lon, url)
1213         {
1214             var wrapper = form.find('.geo_status_wrapper');
1215             if (wrapper.length == 0) {
1216                 wrapper = $('<div class="' + SN.C.S.Success + ' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1217                 wrapper.find('button.close').click(function () {
1218                     form.find('[name=notice_data-geo]').prop('checked', false).change();
1219                     return false;
1220                 });
1221                 form.append(wrapper);
1222             }
1223             var label;
1224             if (url) {
1225                 label = $('<a></a>').attr('href', url);
1226             } else {
1227                 label = $('<span></span>');
1228             }
1229             label.text(status);
1230             if (lat || lon) {
1231                 var latlon = lat + ';' + lon;
1232                 label.attr('title', latlon);
1233                 if (!status) {
1234                     label.text(latlon)
1235                 }
1236             }
1237             wrapper.find('.geo_status').empty().append(label);
1238         },
1239
1240         /**
1241          * Setup function -- DOES NOT trigger actions immediately.
1242          *
1243          * Initializes event handlers for the "Send direct message" link on
1244          * profile pages, setting it up to display a dialog box when clicked.
1245          *
1246          * Unlike the repeat confirmation form, this appears to fetch
1247          * the form _from the original link target_, so the form itself
1248          * doesn't need to be in the current document.
1249          *
1250          * @fixme breaks ability to open link in new window?
1251          */
1252         NewDirectMessage: function () {
1253             NDM = $('.entity_send-a-message a');
1254             NDM.attr({'href': NDM.attr('href') + '&ajax=1'});
1255             NDM.on('click', function () {
1256                 var NDMF = $('.entity_send-a-message form');
1257                 if (NDMF.length === 0) {
1258                     $(this).addClass(SN.C.S.Processing);
1259                     $.get(NDM.attr('href'), null, function (data) {
1260                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1261                         NDMF = $('.entity_send-a-message .form_notice');
1262                         SN.U.FormNoticeXHR(NDMF);
1263                         SN.U.FormNoticeEnhancements(NDMF);
1264                         NDMF.append('<button class="close">&#215;</button>');
1265                         $('.entity_send-a-message button').click(function () {
1266                             NDMF.hide();
1267                             return false;
1268                         });
1269                         NDM.removeClass(SN.C.S.Processing);
1270                     });
1271                 } else {
1272                     NDMF.show();
1273                     $('.entity_send-a-message textarea').focus();
1274                 }
1275                 return false;
1276             });
1277         },
1278
1279         /**
1280          * Return a date object with the current local time on the
1281          * given year, month, and day.
1282          *
1283          * @param {number} year: 4-digit year
1284          * @param {number} month: 0 == January
1285          * @param {number} day: 1 == 1
1286          * @return {Date}
1287          */
1288         GetFullYear: function (year, month, day) {
1289             var date = new Date();
1290             date.setFullYear(year, month, day);
1291
1292             return date;
1293         },
1294
1295         /**
1296          * Some sort of object interface for storing some structured
1297          * information in a cookie.
1298          *
1299          * Appears to be used to save the last-used login nickname?
1300          * That's something that browsers usually take care of for us
1301          * these days, do we really need to do it? Does anything else
1302          * use this interface?
1303          *
1304          * @fixme what is this?
1305          * @fixme should this use non-cookie local storage when available?
1306          */
1307         StatusNetInstance: {
1308             /**
1309              * @fixme what is this?
1310              */
1311             Set: function (value) {
1312                 var SNI = SN.U.StatusNetInstance.Get();
1313                 if (SNI !== null) {
1314                     value = $.extend(SNI, value);
1315                 }
1316
1317                 $.cookie(
1318                     SN.C.S.StatusNetInstance,
1319                     JSON.stringify(value),
1320                     {
1321                         path: '/',
1322                         expires: SN.U.GetFullYear(2029, 0, 1)
1323                     });
1324             },
1325
1326             /**
1327              * @fixme what is this?
1328              */
1329             Get: function () {
1330                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1331                 if (cookieValue !== undefined) {
1332                     return JSON.parse(cookieValue);
1333                 }
1334                 return null;
1335             },
1336
1337             /**
1338              * @fixme what is this?
1339              */
1340             Delete: function () {
1341                 $.cookie(SN.C.S.StatusNetInstance, null);
1342             }
1343         },
1344
1345         /**
1346          * Check if the current page is a timeline where the current user's
1347          * posts should be displayed immediately on success.
1348          *
1349          * @fixme this should be done in a saner way, with machine-readable
1350          * info about what page we're looking at.
1351          *
1352          * @param {DOMElement} notice: HTML chunk with formatted notice
1353          * @return boolean
1354          */
1355         belongsOnTimeline: function (notice) {
1356             var action = $("body").attr('id');
1357             if (action == 'public') {
1358                 return true;
1359             }
1360
1361             var profileLink = $('#nav_profile a').attr('href');
1362             if (profileLink) {
1363                 var authorUrl = $(notice).find('.h-card.p-author').attr('href');
1364                 if (authorUrl == profileLink) {
1365                     if (action == 'all' || action == 'showstream') {
1366                         // Posts always show on your own friends and profile streams.
1367                         return true;
1368                     }
1369                 }
1370             }
1371
1372             // @fixme tag, group, reply timelines should be feasible as well.
1373             // Mismatch between id-based and name-based user/group links currently complicates
1374             // the lookup, since all our inline mentions contain the absolute links but the
1375             // UI links currently on the page use malleable names.
1376
1377             return false;
1378         },
1379
1380         /**
1381          * Switch to another active input sub-form.
1382          * This will hide the current form (if any), show the new one, and
1383          * update the input type tab selection state.
1384          *
1385          * @param {String} tag
1386          */
1387     switchInputFormTab: function (tag) {
1388         // The one that's current isn't current anymore
1389         $('.input_form_nav_tab.current').removeClass('current');
1390             if (tag == 'placeholder') {
1391                 // Hack: when showing the placeholder, mark the tab
1392                 // as current for 'Status'.
1393                 $('#input_form_nav_status').addClass('current');
1394             } else {
1395                 $('#input_form_nav_' + tag).addClass('current');
1396             }
1397
1398             // Don't remove 'current' if we also have the "nonav" class.
1399             // An example would be the message input form. removing
1400             // 'current' will cause the form to vanish from the page.
1401             var nonav = $('.input_form.current.nonav');
1402             if (nonav.length > 0) {
1403                 return;
1404             }
1405
1406         $('.input_form.current').removeClass('current');
1407         $('#input_form_' + tag)
1408                 .addClass('current')
1409                 .find('.ajax-notice').each(function () {
1410                     var form = $(this);
1411                     SN.Init.NoticeFormSetup(form);
1412                 })
1413                 .find('.notice_data-text').focus();
1414
1415         return false;
1416     },
1417
1418         showMoreMenuItems: function (menuid) {
1419             $('#' + menuid + ' .more_link').remove();
1420             var selector = '#' + menuid + ' .extended_menu';
1421             var extended = $(selector);
1422             extended.removeClass('extended_menu');
1423             return void(0);
1424         }
1425     },
1426
1427     Init: {
1428         /**
1429          * If user is logged in, run setup code for the new notice form:
1430          *
1431          *  - char counter
1432          *  - AJAX submission
1433          *  - location events
1434          *  - file upload events
1435          */
1436         NoticeForm: function () {
1437             if ($('body.user_in').length > 0) {
1438                 // SN.Init.NoticeFormSetup() will get run
1439                 // when forms get displayed for the first time...
1440
1441                 // Hack to initialize the placeholder at top
1442                 $('#input_form_placeholder input.placeholder').focus(function () {
1443                     SN.U.switchInputFormTab("status");
1444                 });
1445
1446                 // Make inline reply forms self-close when clicking out.
1447                 $('body').on('click', function (e) {
1448                     var currentForm = $('#content .input_forms div.current');
1449                     if (currentForm.length > 0) {
1450                         if ($('#content .input_forms').has(e.target).length == 0) {
1451                             // If all fields are empty, switch back to the placeholder.
1452                             var fields = currentForm.find('textarea, input[type=text], input[type=""]');
1453                             var anything = false;
1454                             fields.each(function () {
1455                                 anything = anything || $(this).val();
1456                             });
1457                             if (!anything) {
1458                                 SN.U.switchInputFormTab("placeholder");
1459                             }
1460                         }
1461                     }
1462
1463                     var openReplies = $('li.notice-reply');
1464                     if (openReplies.length > 0) {
1465                         var target = $(e.target);
1466                         openReplies.each(function () {
1467                             // Did we click outside this one?
1468                             var replyItem = $(this);
1469                             if (replyItem.has(e.target).length == 0) {
1470                                 var textarea = replyItem.find('.notice_data-text:first');
1471                                 var cur = $.trim(textarea.val());
1472                                 // Only close if there's been no edit.
1473                                 if (cur == '' || cur == textarea.data('initialText')) {
1474                                     var parentNotice = replyItem.closest('li.notice');
1475                                     replyItem.remove();
1476                                     parentNotice.find('li.notice-reply-placeholder').show();
1477                                 }
1478                             }
1479                         });
1480                     }
1481                 });
1482
1483                 // Infield labels for notice form inputs.
1484                 $('.input_forms fieldset fieldset label').inFieldLabels({ fadeOpacity:0 });
1485
1486             }
1487         },
1488
1489         /**
1490          * Encapsulate notice form setup for a single form.
1491          * Plugins can add extra setup by monkeypatching this
1492          * function.
1493          *
1494          * @param {jQuery} form
1495          */
1496         NoticeFormSetup: function (form) {
1497             if (!form.data('NoticeFormSetup')) {
1498                 SN.U.NoticeLocationAttach(form);
1499                 SN.U.FormNoticeXHR(form);
1500                 SN.U.FormNoticeEnhancements(form);
1501                 SN.U.NoticeDataAttach(form);
1502                 form.data('NoticeFormSetup', true);
1503             }
1504         },
1505
1506         /**
1507          * Run setup code for notice timeline views items:
1508          *
1509          * - AJAX submission for fave/repeat/reply (if logged in)
1510          * - Attachment link extras ('more' links)
1511          */
1512         Notices: function () {
1513             if ($('body.user_in').length > 0) {
1514                 var masterForm = $('.form_notice:first');
1515                 if (masterForm.length > 0) {
1516                     SN.C.I.NoticeFormMaster = document._importNode(masterForm[0], true);
1517                 }
1518                 SN.U.NoticeRepeat();
1519                 SN.U.NoticeReply();
1520                 SN.U.NoticeInlineReplySetup();
1521             }
1522
1523             SN.U.NoticeAttachments();
1524         },
1525
1526         /**
1527          * Run setup code for user & group profile page header area if logged in:
1528          *
1529          * - AJAX submission for sub/unsub/join/leave/nudge
1530          * - AJAX form popup for direct-message
1531          */
1532         EntityActions: function () {
1533             if ($('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 code for login form:
1558          *
1559          * - loads saved last-used-nickname from cookie
1560          * - sets event handler to save nickname to cookie on submit
1561          *
1562          * @fixme is this necessary? Browsers do their own form saving these days.
1563          */
1564         Login: function () {
1565             if (SN.U.StatusNetInstance.Get() !== null) {
1566                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1567                 if (nickname !== null) {
1568                     $('#form_login #nickname').val(nickname);
1569                 }
1570             }
1571
1572             $('#form_login').on('submit', function () {
1573                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1574                 return true;
1575             });
1576         },
1577
1578         /**
1579          * Called when a people tag edit box is shown in the interface
1580          *
1581          * - loads the jQuery UI autocomplete plugin
1582          * - sets event handlers for tag completion
1583          *
1584          */
1585         PeopletagAutocomplete: function (txtBox) {
1586             var split = function (val) {
1587                 return val.split( /\s+/ );
1588             }
1589             var extractLast = function (term) {
1590                 return split(term).pop();
1591             }
1592
1593             // don't navigate away from the field on tab when selecting an item
1594             txtBox.on( "keydown", function ( event ) {
1595                 if ( event.keyCode === $.ui.keyCode.TAB &&
1596                         $(this).data( "autocomplete" ).menu.active ) {
1597                     event.preventDefault();
1598                 }
1599             }).autocomplete({
1600                 minLength: 0,
1601                 source: function (request, response) {
1602                     // delegate back to autocomplete, but extract the last term
1603                     response($.ui.autocomplete.filter(
1604                         SN.C.PtagACData, extractLast(request.term)));
1605                 },
1606                 focus: function () {
1607                     return false;
1608                 },
1609                 select: function (event, ui) {
1610                     var terms = split(this.value);
1611                     terms.pop();
1612                     terms.push(ui.item.value);
1613                     terms.push("");
1614                     this.value = terms.join(" ");
1615                     return false;
1616                 }
1617             }).data('autocomplete')._renderItem = function (ul, item) {
1618                     // FIXME: with jQuery UI you cannot have it highlight the match
1619                     var _l = '<a class="ptag-ac-line-tag">' + item.tag
1620                           + ' <em class="privacy_mode">' + item.mode + '</em>'
1621                           + '<span class="freq">' + item.freq + '</span></a>'
1622
1623                     return $("<li/>")
1624                             .addClass('mode-' + item.mode)
1625                             .addClass('ptag-ac-line')
1626                             .data("item.autocomplete", item)
1627                             .append(_l)
1628                             .appendTo(ul);
1629                 }
1630         },
1631
1632         /**
1633          * Run setup for the ajax people tags editor
1634          *
1635          * - show edit button
1636          * - set event handle for click on edit button
1637          *   - loads people tag autocompletion data if not already present
1638          *     or if it is stale.
1639          *
1640          */
1641         PeopleTags: function () {
1642             $('.user_profile_tags .editable').append($('<button class="peopletags_edit_button"/>'));
1643
1644             $(document).on('click', '.peopletags_edit_button', function () {
1645                 var form = $(this).parents('dd').eq(0).find('form');
1646                 // We can buy time from the above animation
1647
1648                 $.ajax({
1649                     url: _peopletagAC,
1650                     dataType: 'json',
1651                     data: {token: $('#token').val()},
1652                     ifModified: true,
1653                     success: function (data) {
1654                         // item.label is used to match
1655                         for (i=0; i < data.length; i++) {
1656                             data[i].label = data[i].tag;
1657                         }
1658
1659                         SN.C.PtagACData = data;
1660                         SN.Init.PeopletagAutocomplete(form.find('#tags'));
1661                     }
1662                 });
1663
1664                 $(this).parents('ul').eq(0).fadeOut(200, function () {form.fadeIn(200).find('input#tags')});
1665             });
1666
1667             $(document).on('click', '.user_profile_tags form .submit', function () {
1668                 SN.U.FormPeopletagsXHR($(this).parents('form')); return false;
1669             });
1670         },
1671
1672         /**
1673          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1674          */
1675         AjaxForms: function () {
1676             $(document).on('submit', 'form.ajax', function () {
1677                 SN.U.FormXHR($(this));
1678                 return false;
1679             });
1680             $(document).on('click', 'form.ajax input[type=submit]', function () {
1681                 // Some forms rely on knowing which submit button was clicked.
1682                 // Save a hidden input field which'll be picked up during AJAX
1683                 // submit...
1684                 var button = $(this);
1685                 var form = button.closest('form');
1686                 form.find('.hidden-submit-button').remove();
1687                 $('<input class="hidden-submit-button" type="hidden" />')
1688                     .attr('name', button.attr('name'))
1689                     .val(button.val())
1690                     .appendTo(form);
1691             });
1692         },
1693
1694         /**
1695          * Add logic to any file upload forms to handle file size limits,
1696          * on browsers that support basic FileAPI.
1697          */
1698         UploadForms: function () {
1699             $('input[type=file]').change(function (event) {
1700                 if (typeof this.files === "object" && this.files.length > 0) {
1701                     var size = 0;
1702                     for (var i = 0; i < this.files.length; i++) {
1703                         size += this.files[i].size;
1704                     }
1705
1706                     var max = SN.U.maxFileSize($(this.form));
1707                     if (max > 0 && size > max) {
1708                         var msg = 'File too large: maximum upload size is %d bytes.';
1709                         alert(msg.replace('%d', max));
1710
1711                         // Clear the files.
1712                         $(this).val('');
1713                         event.preventDefault();
1714                         return false;
1715                     }
1716                 }
1717             });
1718         },
1719
1720         CheckBoxes: function () {
1721             $("span[class='checkbox-wrapper']").addClass("unchecked");
1722             $(".checkbox-wrapper").click(function () {
1723                 if ($(this).children("input").prop("checked")) {
1724                     // uncheck
1725                     $(this).children("input").prop("checked", false);
1726                     $(this).removeClass("checked");
1727                     $(this).addClass("unchecked");
1728                     $(this).children("label").text("Private?");
1729                 } else {
1730                     // check
1731                     $(this).children("input").prop("checked", true);
1732                     $(this).removeClass("unchecked");
1733                     $(this).addClass("checked");
1734                     $(this).children("label").text("Private");
1735                 }
1736             });
1737         }
1738     }
1739 };
1740
1741 /**
1742  * Run initialization functions on DOM-ready.
1743  *
1744  * Note that if we're waiting on other scripts to load, this won't happen
1745  * until that's done. To load scripts asynchronously without delaying setup,
1746  * don't start them loading until after DOM-ready time!
1747  */
1748 $(function () {
1749     SN.Init.AjaxForms();
1750     SN.Init.UploadForms();
1751     SN.Init.CheckBoxes();
1752     if ($('.' + SN.C.S.FormNotice).length > 0) {
1753         SN.Init.NoticeForm();
1754     }
1755     if ($('#content .notices').length > 0) {
1756         SN.Init.Notices();
1757     }
1758     if ($('#content .entity_actions').length > 0) {
1759         SN.Init.EntityActions();
1760     }
1761     if ($('#form_login').length > 0) {
1762         SN.Init.Login();
1763     }
1764     if ($('#profile_search_results').length > 0) {
1765         SN.Init.ProfileSearch();
1766     }
1767     if ($('.user_profile_tags .editable').length > 0) {
1768         SN.Init.PeopleTags();
1769     }
1770 });
1771