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 (typeof SN.messages[key] == "undefined") {
  82             return '[' + key + ']';
  83         } else {
  84             return SN.messages[key];
  85         }
  86     },
  87
  88     U: { // Utils
  89         /**
  90          * Setup function -- DOES NOT trigger actions immediately.
  91          *
  92          * Sets up event handlers on the new notice form.
  93          *
  94          * @param {jQuery} form: jQuery object whose first matching element is the form
  95          * @access private
  96          */
  97         FormNoticeEnhancements: function(form) {
  98             if (jQuery.data(form[0], 'ElementData') === undefined) {
  99                 MaxLength = form.find('.count').text();
 100                 if (typeof(MaxLength) == 'undefined') {
 101                      MaxLength = SN.C.I.MaxLength;
 102                 }
 103                 jQuery.data(form[0], 'ElementData', {MaxLength:MaxLength});
 104
 105                 SN.U.Counter(form);
 106
 107                 NDT = form.find('.notice_data-text:first');
 108
 109                 NDT.bind('keyup', function(e) {
 110                     SN.U.Counter(form);
 111                 });
 112
 113                 var delayedUpdate= function(e) {
 114                     // Cut and paste events fire *before* the operation,
 115                     // so we need to trigger an update in a little bit.
 116                     // This would be so much easier if the 'change' event
 117                     // actually fired every time the value changed. :P
 118                     window.setTimeout(function() {
 119                         SN.U.Counter(form);
 120                     }, 50);
 121                 };
 122                 // Note there's still no event for mouse-triggered 'delete'.
 123                 NDT.bind('cut', delayedUpdate)
 124                    .bind('paste', delayedUpdate);
 125             }
 126             else {
 127                 form.find('.count').text(jQuery.data(form[0], 'ElementData').MaxLength);
 128             }
 129         },
 130
 131         /**
 132          * To be called from event handlers on the notice import form.
 133          * Triggers an update of the remaining-characters counter.
 134          *
 135          * Additional counter updates will be suppressed during the
 136          * next half-second to avoid flooding the layout engine with
 137          * updates, followed by another automatic check.
 138          *
 139          * The maximum length is pulled from data established by
 140          * FormNoticeEnhancements.
 141          *
 142          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 143          * @access private
 144          */
 145         Counter: function(form) {
 146             SN.C.I.FormNoticeCurrent = form;
 147
 148             var MaxLength = jQuery.data(form[0], 'ElementData').MaxLength;
 149
 150             if (MaxLength <= 0) {
 151                 return;
 152             }
 153
 154             var remaining = MaxLength - SN.U.CharacterCount(form);
 155             var counter = form.find('.count');
 156
 157             if (remaining.toString() != counter.text()) {
 158                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 159                     if (counter.text() != String(remaining)) {
 160                         counter.text(remaining);
 161                     }
 162                     if (remaining < 0) {
 163                         form.addClass(SN.C.S.Warning);
 164                     } else {
 165                         form.removeClass(SN.C.S.Warning);
 166                     }
 167                     // Skip updates for the next 500ms.
 168                     // On slower hardware, updating on every keypress is unpleasant.
 169                     if (!SN.C.I.CounterBlackout) {
 170                         SN.C.I.CounterBlackout = true;
 171                         SN.C.I.FormNoticeCurrent = form;
 172                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 173                     }
 174                 }
 175             }
 176         },
 177
 178         /**
 179          * Pull the count of characters in the current edit field.
 180          * Plugins replacing the edit control may need to override this.
 181          *
 182          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 183          * @return number of chars
 184          */
 185         CharacterCount: function(form) {
 186             return form.find('.notice_data-text:first').val().length;
 187         },
 188
 189         /**
 190          * Called internally after the counter update blackout period expires;
 191          * runs another update to make sure we didn't miss anything.
 192          *
 193          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 194          * @access private
 195          */
 196         ClearCounterBlackout: function(form) {
 197             // Allow keyup events to poke the counter again
 198             SN.C.I.CounterBlackout = false;
 199             // Check if the string changed since we last looked
 200             SN.U.Counter(form);
 201         },
 202
 203         /**
 204          * Helper function to rewrite default HTTP form action URLs to HTTPS
 205          * so we can actually fetch them when on an SSL page in ssl=sometimes
 206          * mode.
 207          *
 208          * It would be better to output URLs that didn't hardcode protocol
 209          * and hostname in the first place...
 210          *
 211          * @param {String} url
 212          * @return string
 213          */
 214         RewriteAjaxAction: function(url) {
 215             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 216             if (document.location.protocol == 'https:' && url.substr(0, 5) == 'http:') {
 217                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 218             } else {
 219                 return url;
 220             }
 221         },
 222
 223         /**
 224          * Grabs form data and submits it asynchronously, with 'ajax=1'
 225          * parameter added to the rest.
 226          *
 227          * If a successful response includes another form, that form
 228          * will be extracted and copied in, replacing the original form.
 229          * If there's no form, the first paragraph will be used.
 230          *
 231          * This will automatically be applied on the 'submit' event for
 232          * any form with the 'ajax' class.
 233          *
 234          * @fixme can sometimes explode confusingly if returnd data is bogus
 235          * @fixme error handling is pretty vague
 236          * @fixme can't submit file uploads
 237          *
 238          * @param {jQuery} form: jQuery object whose first element is a form
 239          *
 240          * @access public
 241          */
 242         FormXHR: function(form) {
 243             $.ajax({
 244                 type: 'POST',
 245                 dataType: 'xml',
 246                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 247                 data: form.serialize() + '&ajax=1',
 248                 beforeSend: function(xhr) {
 249                     form
 250                         .addClass(SN.C.S.Processing)
 251                         .find('.submit')
 252                             .addClass(SN.C.S.Disabled)
 253                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 254                 },
 255                 error: function (xhr, textStatus, errorThrown) {
 256                     // If the server end reported an error from StatusNet,
 257                     // find it -- otherwise we'll see what was reported
 258                     // from the browser.
 259                     var errorReported = null;
 260                     if (xhr.responseXML) {
 261                         errorReported = $('#error', xhr.responseXML).text();
 262                     }
 263                     alert(errorReported || errorThrown || textStatus);
 264
 265                     // Restore the form to original state.
 266                     // Hopefully. :D
 267                     form
 268                         .removeClass(SN.C.S.Processing)
 269                         .find('.submit')
 270                             .removeClass(SN.C.S.Disabled)
 271                             .removeAttr(SN.C.S.Disabled);
 272                 },
 273                 success: function(data, textStatus) {
 274                     if (typeof($('form', data)[0]) != 'undefined') {
 275                         form_new = document._importNode($('form', data)[0], true);
 276                         form.replaceWith(form_new);
 277                     }
 278                     else if (typeof($('p', data)[0]) != 'undefined') {
 279                         form.replaceWith(document._importNode($('p', data)[0], true));
 280                     }
 281                     else {
 282                         alert('Unknown error.');
 283                     }
 284                 }
 285             });
 286         },
 287
 288         /**
 289          * Setup function -- DOES NOT trigger actions immediately.
 290          *
 291          * Sets up event handlers for special-cased async submission of the
 292          * notice-posting form, including some pre-post validation.
 293          *
 294          * Unlike FormXHR() this does NOT submit the form immediately!
 295          * It sets up event handlers so that any method of submitting the
 296          * form (click on submit button, enter, submit() etc) will trigger
 297          * it properly.
 298          *
 299          * Also unlike FormXHR(), this system will use a hidden iframe
 300          * automatically to handle file uploads via <input type="file">
 301          * controls.
 302          *
 303          * @fixme tl;dr
 304          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 305          * @fixme error handling is unreliable
 306          * @fixme cookieValue is a global variable, but probably shouldn't be
 307          * @fixme saving the location cache cookies should be split out
 308          * @fixme some error messages are hardcoded english: needs i18n
 309          * @fixme special-case for bookmarklet is confusing and uses a global var "self". Is this ok?
 310          *
 311          * @param {jQuery} form: jQuery object whose first element is a form
 312          *
 313          * @access public
 314          */
 315         FormNoticeXHR: function(form) {
 316             SN.C.I.NoticeDataGeo = {};
 317             form.append('<input type="hidden" name="ajax" value="1"/>');
 318
 319             // Make sure we don't have a mixed HTTP/HTTPS submission...
 320             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 321
 322             /**
 323              * Show a response feedback bit under the new-notice dialog.
 324              *
 325              * @param {String} cls: CSS class name to use ('error' or 'success')
 326              * @param {String} text
 327              * @access private
 328              */
 329             var showFeedback = function(cls, text) {
 330                 form.append(
 331                     $('<p class="form_response"></p>')
 332                         .addClass(cls)
 333                         .text(text)
 334                 );
 335             };
 336
 337             /**
 338              * Hide the previous response feedback, if any.
 339              */
 340             var removeFeedback = function() {
 341                 form.find('.form_response').remove();
 342             };
 343
 344             form.ajaxForm({
 345                 dataType: 'xml',
 346                 timeout: '60000',
 347                 beforeSend: function(formData) {
 348                     if (form.find('.notice_data-text:first').val() == '') {
 349                         form.addClass(SN.C.S.Warning);
 350                         return false;
 351                     }
 352                     form
 353                         .addClass(SN.C.S.Processing)
 354                         .find('.submit')
 355                             .addClass(SN.C.S.Disabled)
 356                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 357
 358                     SN.U.normalizeGeoData(form);
 359
 360                     return true;
 361                 },
 362                 error: function (xhr, textStatus, errorThrown) {
 363                     form
 364                         .removeClass(SN.C.S.Processing)
 365                         .find('.submit')
 366                             .removeClass(SN.C.S.Disabled)
 367                             .removeAttr(SN.C.S.Disabled, SN.C.S.Disabled);
 368                     removeFeedback();
 369                     if (textStatus == 'timeout') {
 370                         // @fixme i18n
 371                         showFeedback('error', 'Sorry! We had trouble sending your notice. The servers are overloaded. Please try again, and contact the site administrator if this problem persists.');
 372                     }
 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                         }
 378                         else {
 379                             if (parseInt(xhr.status) === 0 || jQuery.inArray(parseInt(xhr.status), SN.C.I.HTTP20x30x) >= 0) {
 380                                 form
 381                                     .resetForm()
 382                                     .find('.attach-status').remove();
 383                                 SN.U.FormNoticeEnhancements(form);
 384                             }
 385                             else {
 386                                 // @fixme i18n
 387                                 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.');
 388                             }
 389                         }
 390                     }
 391                 },
 392                 success: function(data, textStatus) {
 393                     removeFeedback();
 394                     var errorResult = $('#'+SN.C.S.Error, data);
 395                     if (errorResult.length > 0) {
 396                         showFeedback('error', errorResult.text());
 397                     }
 398                     else {
 399                         if($('body')[0].id == 'bookmarklet') {
 400                             // @fixme self is not referenced anywhere?
 401                             self.close();
 402                         }
 403
 404                         var commandResult = $('#'+SN.C.S.CommandResult, data);
 405                         if (commandResult.length > 0) {
 406                             showFeedback('success', commandResult.text());
 407                         }
 408                         else {
 409                             // New notice post was successful. If on our timeline, show it!
 410                             var notice = document._importNode($('li', data)[0], true);
 411                             var notices = $('#notices_primary .notices:first');
 412                             var replyItem = form.closest('li.notice-reply');
 413
 414                             if (replyItem.length > 0) {
 415                                 // If this is an inline reply, remove the form...
 416                                 var list = form.closest('.threaded-replies');
 417                                 var placeholder = list.find('.notice-reply-placeholder');
 418                                 replyItem.remove();
 419
 420                                 var id = $(notice).attr('id');
 421                                 if ($("#"+id).length == 0) {
 422                                     $(notice).insertBefore(placeholder);
 423                                 } else {
 424                                     // Realtime came through before us...
 425                                 }
 426
 427                                 // ...and show the placeholder form.
 428                                 placeholder.show();
 429                             } else if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
 430                                 // Not a reply. If on our timeline, show it at the top!
 431
 432                                 if ($('#'+notice.id).length === 0) {
 433                                     var notice_irt_value = form.find('[name=inreplyto]').val();
 434                                     var notice_irt = '#notices_primary #notice-'+notice_irt_value;
 435                                     if($('body')[0].id == 'conversation') {
 436                                         if(notice_irt_value.length > 0 && $(notice_irt+' .notices').length < 1) {
 437                                             $(notice_irt).append('<ul class="notices"></ul>');
 438                                         }
 439                                         $($(notice_irt+' .notices')[0]).append(notice);
 440                                     }
 441                                     else {
 442                                         notices.prepend(notice);
 443                                     }
 444                                     $('#'+notice.id)
 445                                         .css({display:'none'})
 446                                         .fadeIn(2500);
 447                                     SN.U.NoticeWithAttachment($('#'+notice.id));
 448                                     SN.U.switchInputFormTab("placeholder");
 449                                 }
 450                             } else {
 451                                 // Not on a timeline that this belongs on?
 452                                 // Just show a success message.
 453                                 // @fixme inline
 454                                 showFeedback('success', $('title', data).text());
 455                             }
 456                         }
 457                         form.resetForm();
 458                         form.find('[name=inreplyto]').val('');
 459                         form.find('.attach-status').remove();
 460                         SN.U.FormNoticeEnhancements(form);
 461                     }
 462                 },
 463                 complete: function(xhr, textStatus) {
 464                     form
 465                         .removeClass(SN.C.S.Processing)
 466                         .find('.submit')
 467                             .removeAttr(SN.C.S.Disabled)
 468                             .removeClass(SN.C.S.Disabled);
 469
 470                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 471                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 472                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 473                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 474                     form.find('[name=notice_data-geo]').attr('checked', SN.C.I.NoticeDataGeo.NDG);
 475                 }
 476             });
 477         },
 478
 479         FormProfileSearchXHR: function(form) {
 480             $.ajax({
 481                 type: 'POST',
 482                 dataType: 'xml',
 483                 url: form.attr('action'),
 484                 data: form.serialize() + '&ajax=1',
 485                 beforeSend: function(xhr) {
 486                     form
 487                         .addClass(SN.C.S.Processing)
 488                         .find('.submit')
 489                             .addClass(SN.C.S.Disabled)
 490                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 491                 },
 492                 error: function (xhr, textStatus, errorThrown) {
 493                     alert(errorThrown || textStatus);
 494                 },
 495                 success: function(data, textStatus) {
 496                     var results_placeholder = $('#profile_search_results');
 497                     if (typeof($('ul', data)[0]) != 'undefined') {
 498                         var list = document._importNode($('ul', data)[0], true);
 499                         results_placeholder.replaceWith(list);
 500                     }
 501                     else {
 502                         var _error = $('<li/>').append(document._importNode($('p', data)[0], true));
 503                         results_placeholder.html(_error);
 504                     }
 505                     form
 506                         .removeClass(SN.C.S.Processing)
 507                         .find('.submit')
 508                             .removeClass(SN.C.S.Disabled)
 509                             .attr(SN.C.S.Disabled, false);
 510                 }
 511             });
 512         },
 513
 514         FormPeopletagsXHR: function(form) {
 515             $.ajax({
 516                 type: 'POST',
 517                 dataType: 'xml',
 518                 url: form.attr('action'),
 519                 data: form.serialize() + '&ajax=1',
 520                 beforeSend: function(xhr) {
 521                     form.find('.submit')
 522                             .addClass(SN.C.S.Processing)
 523                             .addClass(SN.C.S.Disabled)
 524                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 525                 },
 526                 error: function (xhr, textStatus, errorThrown) {
 527                     alert(errorThrown || textStatus);
 528                 },
 529                 success: function(data, textStatus) {
 530                     var results_placeholder = form.parents('.entity_tags');
 531                     if (typeof($('.entity_tags', data)[0]) != 'undefined') {
 532                         var tags = document._importNode($('.entity_tags', data)[0], true);
 533                         $(tags).find('.editable').append($('<button class="peopletags_edit_button"/>'));
 534                         results_placeholder.replaceWith(tags);
 535                     } else {
 536                         results_placeholder.find('p').remove();
 537                         results_placeholder.append(document._importNode($('p', data)[0], true));
 538                         form.removeClass(SN.C.S.Processing)
 539                             .find('.submit')
 540                                 .removeClass(SN.C.S.Disabled)
 541                                 .attr(SN.C.S.Disabled, false);
 542                     }
 543                 }
 544             });
 545         },
 546
 547         normalizeGeoData: function(form) {
 548             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 549             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 550             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 551             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 552             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked'); // @fixme
 553
 554             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 555
 556             if (cookieValue !== null && cookieValue != 'disabled') {
 557                 cookieValue = JSON.parse(cookieValue);
 558                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 559                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 560                 if (cookieValue.NLNS) {
 561                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 562                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 563                 } else {
 564                     form.find('[name=location_ns]').val('');
 565                     form.find('[name=location_id]').val('');
 566                 }
 567             }
 568             if (cookieValue == 'disabled') {
 569                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', false).attr('checked');
 570             }
 571             else {
 572                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', true).attr('checked');
 573             }
 574
 575         },
 576
 577         /**
 578          * Fetch an XML DOM from an XHR's response data.
 579          *
 580          * Works around unavailable responseXML when document.domain
 581          * has been modified by Meteor or other tools, in some but not
 582          * all browsers.
 583          *
 584          * @param {XMLHTTPRequest} xhr
 585          * @return DOMDocument
 586          */
 587         GetResponseXML: function(xhr) {
 588             try {
 589                 return xhr.responseXML;
 590             } catch (e) {
 591                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 592             }
 593         },
 594
 595         /**
 596          * Setup function -- DOES NOT trigger actions immediately.
 597          *
 598          * Sets up event handlers on all visible notice's reply buttons to
 599          * tweak the new-notice form with needed variables and focus it
 600          * when pushed.
 601          *
 602          * (This replaces the default reply button behavior to submit
 603          * directly to a form which comes back with a specialized page
 604          * with the form data prefilled.)
 605          *
 606          * @access private
 607          */
 608         NoticeReply: function() {
 609             $('#content .notice_reply').live('click', function(e) {
 610                 e.preventDefault();
 611                 var notice = $(this).closest('li.notice');
 612                 var nickname = ($('.author .nickname', notice).length > 0) ? $($('.author .nickname', notice)[0]) : $('.author .nickname.uid');
 613                 SN.U.NoticeInlineReplyTrigger(notice, '@' + nickname.text());
 614                 return false;
 615             });
 616         },
 617
 618         /**
 619          * Stub -- kept for compat with plugins for now.
 620          * @access private
 621          */
 622         NoticeReplyTo: function(notice) {
 623         },
 624
 625         /**
 626          * Open up a notice's inline reply box.
 627          *
 628          * @param {jQuery} notice: jQuery object containing one notice
 629          * @param {String} initialText
 630          */
 631         NoticeInlineReplyTrigger: function(notice, initialText) {
 632             // Find the notice we're replying to...
 633             var id = $($('.notice_id', notice)[0]).text();
 634             var parentNotice = notice;
 635
 636             // Find the threaded replies view we'll be adding to...
 637             var list = notice.closest('.notices');
 638             if (list.hasClass('threaded-replies')) {
 639                 // We're replying to a reply; use reply form on the end of this list.
 640                 // We'll add our form at the end of this; grab the root notice.
 641                 parentNotice = list.closest('.notice');
 642             } else {
 643                 // We're replying to a parent notice; pull its threaded list
 644                 // and we'll add on the end of it. Will add if needed.
 645                 list = $('ul.threaded-replies', notice);
 646                 if (list.length == 0) {
 647                     list = $('<ul class="notices threaded-replies xoxo"></ul>');
 648                     notice.append(list);
 649                 }
 650             }
 651
 652             // See if the form's already open...
 653             var replyForm = $('.notice-reply-form', list);
 654
 655             var nextStep = function() {
 656                 // Override...?
 657                 replyForm.find('input[name=inreplyto]').val(id);
 658                 replyForm.find('#notice_to').attr('disabled', 'disabled').hide();
 659                 replyForm.find('#notice_private').attr('disabled', 'disabled').hide();
 660                 replyForm.find('label[for=notice_to]').hide();
 661                 replyForm.find('label[for=notice_private]').hide();
 662
 663                 // Set focus...
 664                 var text = replyForm.find('textarea');
 665                 if (text.length == 0) {
 666                     throw "No textarea";
 667                 }
 668                 var replyto = '';
 669                 if (initialText) {
 670                     replyto = initialText + ' ';
 671                 }
 672                 text.val(replyto + text.val().replace(RegExp(replyto, 'i'), ''));
 673                 text.data('initialText', $.trim(initialText + ''));
 674                 text.focus();
 675                 if (text[0].setSelectionRange) {
 676                     var len = text.val().length;
 677                     text[0].setSelectionRange(len,len);
 678                 }
 679             };
 680             if (replyForm.length > 0) {
 681                 // Update the existing form...
 682                 nextStep();
 683             } else {
 684                 // Hide the placeholder...
 685                 var placeholder = list.find('li.notice-reply-placeholder').hide();
 686
 687                 // Create the reply form entry at the end
 688                 var replyItem = $('li.notice-reply', list);
 689                 if (replyItem.length == 0) {
 690                     replyItem = $('<li class="notice-reply"></li>');
 691
 692                     var intermediateStep = function(formMaster) {
 693                         var formEl = document._importNode(formMaster, true);
 694                         replyItem.append(formEl);
 695                         list.append(replyItem); // *after* the placeholder
 696
 697                         var form = replyForm = $(formEl);
 698                         SN.Init.NoticeFormSetup(form);
 699
 700                         nextStep();
 701                     };
 702                     if (SN.C.I.NoticeFormMaster) {
 703                         // We've already saved a master copy of the form.
 704                         // Clone it in!
 705                         intermediateStep(SN.C.I.NoticeFormMaster);
 706                     } else {
 707                         // Fetch a fresh copy of the notice form over AJAX.
 708                         // Warning: this can have a delay, which looks bad.
 709                         // @fixme this fallback may or may not work
 710                         var url = $('#form_notice').attr('action');
 711                         $.get(url, {ajax: 1}, function(data, textStatus, xhr) {
 712                             intermediateStep($('form', data)[0]);
 713                         });
 714                     }
 715                 }
 716             }
 717         },
 718
 719         NoticeInlineReplyPlaceholder: function(notice) {
 720             var list = notice.find('ul.threaded-replies');
 721             var placeholder = $('<li class="notice-reply-placeholder">' +
 722                                     '<input class="placeholder">' +
 723                                 '</li>');
 724             placeholder.find('input')
 725                 .val(SN.msg('reply_placeholder'));
 726             list.append(placeholder);
 727         },
 728
 729         /**
 730          * Setup function -- DOES NOT apply immediately.
 731          *
 732          * Sets up event handlers for inline reply mini-form placeholders.
 733          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 734          */
 735         NoticeInlineReplySetup: function() {
 736             $('li.notice-reply-placeholder input')
 737                 .live('focus', function() {
 738                     var notice = $(this).closest('li.notice');
 739                     SN.U.NoticeInlineReplyTrigger(notice);
 740                     return false;
 741                 });
 742             $('li.notice-reply-comments a')
 743                 .live('click', function() {
 744                     var url = $(this).attr('href');
 745                     var area = $(this).closest('.threaded-replies');
 746                     $.get(url, {ajax: 1}, function(data, textStatus, xhr) {
 747                         var replies = $('.threaded-replies', data);
 748                         if (replies.length) {
 749                             area.replaceWith(document._importNode(replies[0], true));
 750                         }
 751                     });
 752                     return false;
 753                 });
 754         },
 755
 756         /**
 757          * Setup function -- DOES NOT trigger actions immediately.
 758          *
 759          * Sets up event handlers for repeat forms to toss up a confirmation
 760          * popout before submitting.
 761          *
 762          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 763          */
 764         NoticeRepeat: function() {
 765             $('.form_repeat').live('click', function(e) {
 766                 e.preventDefault();
 767
 768                 SN.U.NoticeRepeatConfirmation($(this));
 769                 return false;
 770             });
 771         },
 772
 773         /**
 774          * Shows a confirmation dialog box variant of the repeat button form.
 775          * This seems to use a technique where the repeat form contains
 776          * _both_ a standalone button _and_ text and buttons for a dialog.
 777          * The dialog will close after its copy of the form is submitted,
 778          * or if you click its 'close' button.
 779          *
 780          * The dialog is created by duplicating the original form and changing
 781          * its style; while clever, this is hard to generalize and probably
 782          * duplicates a lot of unnecessary HTML output.
 783          *
 784          * @fixme create confirmation dialogs through a generalized interface
 785          * that can be reused instead of hardcoded text and styles.
 786          *
 787          * @param {jQuery} form
 788          */
 789         NoticeRepeatConfirmation: function(form) {
 790             var submit_i = form.find('.submit');
 791
 792             var submit = submit_i.clone();
 793             submit
 794                 .addClass('submit_dialogbox')
 795                 .removeClass('submit');
 796             form.append(submit);
 797             submit.bind('click', function() { SN.U.FormXHR(form); return false; });
 798
 799             submit_i.hide();
 800
 801             form
 802                 .addClass('dialogbox')
 803                 .append('<button class="close">&#215;</button>')
 804                 .closest('.notice-options')
 805                     .addClass('opaque');
 806
 807             form.find('button.close').click(function(){
 808                 $(this).remove();
 809
 810                 form
 811                     .removeClass('dialogbox')
 812                     .closest('.notice-options')
 813                         .removeClass('opaque');
 814
 815                 form.find('.submit_dialogbox').remove();
 816                 form.find('.submit').show();
 817
 818                 return false;
 819             });
 820         },
 821
 822         /**
 823          * Setup function -- DOES NOT trigger actions immediately.
 824          *
 825          * Goes through all notices currently displayed and sets up attachment
 826          * handling if needed.
 827          */
 828         NoticeAttachments: function() {
 829             $('.notice a.attachment').each(function() {
 830                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 831             });
 832         },
 833
 834         /**
 835          * Setup function -- DOES NOT trigger actions immediately.
 836          *
 837          * Sets up special attachment link handling if needed. Currently this
 838          * consists only of making the "more" button used for OStatus message
 839          * cropping turn into an auto-expansion button that loads the full
 840          * text from an attachment file.
 841          *
 842          * @param {jQuery} notice
 843          */
 844         NoticeWithAttachment: function(notice) {
 845             if (notice.find('.attachment').length === 0) {
 846                 return;
 847             }
 848
 849             var attachment_more = notice.find('.attachment.more');
 850             if (attachment_more.length > 0) {
 851                 $(attachment_more[0]).click(function() {
 852                     var m = $(this);
 853                     m.addClass(SN.C.S.Processing);
 854                     $.get(m.attr('href')+'/ajax', null, function(data) {
 855                         m.parent('.entry-content').html($(data).find('#attachment_view .entry-content').html());
 856                     });
 857
 858                     return false;
 859                 }).attr('title', SN.msg('showmore_tooltip'));
 860             }
 861         },
 862
 863         /**
 864          * Setup function -- DOES NOT trigger actions immediately.
 865          *
 866          * Sets up event handlers for the file-attachment widget in the
 867          * new notice form. When a file is selected, a box will be added
 868          * below the text input showing the filename and, if supported
 869          * by the browser, a thumbnail preview.
 870          *
 871          * This preview box will also allow removing the attachment
 872          * prior to posting.
 873          *
 874          * @param {jQuery} form
 875          */
 876         NoticeDataAttach: function(form) {
 877             var NDA = form.find('input[type=file]');
 878             NDA.change(function(event) {
 879                 form.find('.attach-status').remove();
 880
 881                 var filename = $(this).val();
 882                 if (!filename) {
 883                     // No file -- we've been tricked!
 884                     return false;
 885                 }
 886
 887                 var attachStatus = $('<div class="attach-status '+SN.C.S.Success+'"><code></code> <button class="close">&#215;</button></div>');
 888                 attachStatus.find('code').text(filename);
 889                 attachStatus.find('button').click(function(){
 890                     attachStatus.remove();
 891                     NDA.val('');
 892
 893                     return false;
 894                 });
 895                 form.append(attachStatus);
 896
 897                 if (typeof this.files == "object") {
 898                     // Some newer browsers will let us fetch the files for preview.
 899                     for (var i = 0; i < this.files.length; i++) {
 900                         SN.U.PreviewAttach(form, this.files[i]);
 901                     }
 902                 }
 903             });
 904         },
 905
 906         /**
 907          * Get PHP's MAX_FILE_SIZE setting for this form;
 908          * used to apply client-side file size limit checks.
 909          *
 910          * @param {jQuery} form
 911          * @return int max size in bytes; 0 or negative means no limit
 912          */
 913         maxFileSize: function(form) {
 914             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 915             if (max) {
 916                 return parseInt(max);
 917             } else {
 918                 return 0;
 919             }
 920         },
 921
 922         /**
 923          * For browsers with FileAPI support: make a thumbnail if possible,
 924          * and append it into the attachment display widget.
 925          *
 926          * Known good:
 927          * - Firefox 3.6.6, 4.0b7
 928          * - Chrome 8.0.552.210
 929          *
 930          * Known ok metadata, can't get contents:
 931          * - Safari 5.0.2
 932          *
 933          * Known fail:
 934          * - Opera 10.63, 11 beta (no input.files interface)
 935          *
 936          * @param {jQuery} form
 937          * @param {File} file
 938          *
 939          * @todo use configured thumbnail size
 940          * @todo detect pixel size?
 941          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 942          */
 943         PreviewAttach: function(form, file) {
 944             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 945             var preview = true;
 946
 947             var blobAsDataURL;
 948             if (typeof window.createObjectURL != "undefined") {
 949                 /**
 950                  * createObjectURL lets us reference the file directly from an <img>
 951                  * This produces a compact URL with an opaque reference to the file,
 952                  * which we can reference immediately.
 953                  *
 954                  * - Firefox 3.6.6: no
 955                  * - Firefox 4.0b7: no
 956                  * - Safari 5.0.2: no
 957                  * - Chrome 8.0.552.210: works!
 958                  */
 959                 blobAsDataURL = function(blob, callback) {
 960                     callback(window.createObjectURL(blob));
 961                 }
 962             } else if (typeof window.FileReader != "undefined") {
 963                 /**
 964                  * FileAPI's FileReader can build a data URL from a blob's contents,
 965                  * but it must read the file and build it asynchronously. This means
 966                  * we'll be passing a giant data URL around, which may be inefficient.
 967                  *
 968                  * - Firefox 3.6.6: works!
 969                  * - Firefox 4.0b7: works!
 970                  * - Safari 5.0.2: no
 971                  * - Chrome 8.0.552.210: works!
 972                  */
 973                 blobAsDataURL = function(blob, callback) {
 974                     var reader = new FileReader();
 975                     reader.onload = function(event) {
 976                         callback(reader.result);
 977                     }
 978                     reader.readAsDataURL(blob);
 979                 }
 980             } else {
 981                 preview = false;
 982             }
 983
 984             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 985             if ($.inArray(file.type, imageTypes) == -1) {
 986                 // We probably don't know how to show the file.
 987                 preview = false;
 988             }
 989
 990             var maxSize = 8 * 1024 * 1024;
 991             if (file.size > maxSize) {
 992                 // Don't kill the browser trying to load some giant image.
 993                 preview = false;
 994             }
 995
 996             if (preview) {
 997                 blobAsDataURL(file, function(url) {
 998                     var img = $('<img>')
 999                         .attr('title', tooltip)
1000                         .attr('alt', tooltip)
1001                         .attr('src', url)
1002                         .attr('style', 'height: 120px');
1003                     form.find('.attach-status').append(img);
1004                 });
1005             } else {
1006                 var img = $('<div></div>').text(tooltip);
1007                 form.find('.attach-status').append(img);
1008             }
1009         },
1010
1011         /**
1012          * Setup function -- DOES NOT trigger actions immediately.
1013          *
1014          * Initializes state for the location-lookup features in the
1015          * new-notice form. Seems to set up some event handlers for
1016          * triggering lookups and using the new values.
1017          *
1018          * @param {jQuery} form
1019          *
1020          * @fixme tl;dr
1021          * @fixme there's not good visual state update here, so users have a
1022          *        hard time figuring out if it's working or fixing if it's wrong.
1023          *
1024          */
1025         NoticeLocationAttach: function(form) {
1026             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
1027             var NLat = form.find('[name=lat]')
1028             var NLon = form.find('[name=lon]')
1029             var NLNS = form.find('[name=location_ns]').val();
1030             var NLID = form.find('[name=location_id]').val();
1031             var NLN = ''; // @fixme
1032             var NDGe = form.find('[name=notice_data-geo]');
1033             var check = form.find('[name=notice_data-geo]');
1034             var label = form.find('label.notice_data-geo');
1035
1036             function removeNoticeDataGeo(error) {
1037                 label
1038                     .attr('title', jQuery.trim(label.text()))
1039                     .removeClass('checked');
1040
1041                 form.find('[name=lat]').val('');
1042                 form.find('[name=lon]').val('');
1043                 form.find('[name=location_ns]').val('');
1044                 form.find('[name=location_id]').val('');
1045                 form.find('[name=notice_data-geo]').attr('checked', false);
1046
1047                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1048
1049                 if (error) {
1050                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1051                     form.find('.geo_status_wrapper .geo_status').text(error);
1052                 } else {
1053                     form.find('.geo_status_wrapper').remove();
1054                 }
1055             }
1056
1057             function getJSONgeocodeURL(geocodeURL, data) {
1058                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1059                 $.getJSON(geocodeURL, data, function(location) {
1060                     var lns, lid;
1061
1062                     if (typeof(location.location_ns) != 'undefined') {
1063                         form.find('[name=location_ns]').val(location.location_ns);
1064                         lns = location.location_ns;
1065                     }
1066
1067                     if (typeof(location.location_id) != 'undefined') {
1068                         form.find('[name=location_id]').val(location.location_id);
1069                         lid = location.location_id;
1070                     }
1071
1072                     if (typeof(location.name) == 'undefined') {
1073                         NLN_text = data.lat + ';' + data.lon;
1074                     }
1075                     else {
1076                         NLN_text = location.name;
1077                     }
1078
1079                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1080                     label
1081                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1082
1083                     form.find('[name=lat]').val(data.lat);
1084                     form.find('[name=lon]').val(data.lon);
1085                     form.find('[name=location_ns]').val(lns);
1086                     form.find('[name=location_id]').val(lid);
1087                     form.find('[name=notice_data-geo]').attr('checked', true);
1088
1089                     var cookieValue = {
1090                         NLat: data.lat,
1091                         NLon: data.lon,
1092                         NLNS: lns,
1093                         NLID: lid,
1094                         NLN: NLN_text,
1095                         NLNU: location.url,
1096                         NDG: true
1097                     };
1098
1099                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1100                 });
1101             }
1102
1103             if (check.length > 0) {
1104                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1105                     check.attr('checked', false);
1106                 }
1107                 else {
1108                     check.attr('checked', true);
1109                 }
1110
1111                 var NGW = form.find('.notice_data-geo_wrap');
1112                 var geocodeURL = NGW.attr('data-api');
1113
1114                 label
1115                     .attr('title', label.text());
1116
1117                 check.change(function() {
1118                     if (check.attr('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1119                         label
1120                             .attr('title', NoticeDataGeo_text.ShareDisable)
1121                             .addClass('checked');
1122
1123                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1124                             if (navigator.geolocation) {
1125                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1126                                 navigator.geolocation.getCurrentPosition(
1127                                     function(position) {
1128                                         form.find('[name=lat]').val(position.coords.latitude);
1129                                         form.find('[name=lon]').val(position.coords.longitude);
1130
1131                                         var data = {
1132                                             lat: position.coords.latitude,
1133                                             lon: position.coords.longitude,
1134                                             token: $('#token').val()
1135                                         };
1136
1137                                         getJSONgeocodeURL(geocodeURL, data);
1138                                     },
1139
1140                                     function(error) {
1141                                         switch(error.code) {
1142                                             case error.PERMISSION_DENIED:
1143                                                 removeNoticeDataGeo('Location permission denied.');
1144                                                 break;
1145                                             case error.TIMEOUT:
1146                                                 //$('#'+SN.C.S.NoticeDataGeo).attr('checked', false);
1147                                                 removeNoticeDataGeo('Location lookup timeout.');
1148                                                 break;
1149                                         }
1150                                     },
1151
1152                                     {
1153                                         timeout: 10000
1154                                     }
1155                                 );
1156                             }
1157                             else {
1158                                 if (NLat.length > 0 && NLon.length > 0) {
1159                                     var data = {
1160                                         lat: NLat,
1161                                         lon: NLon,
1162                                         token: $('#token').val()
1163                                     };
1164
1165                                     getJSONgeocodeURL(geocodeURL, data);
1166                                 }
1167                                 else {
1168                                     removeNoticeDataGeo();
1169                                     check.remove();
1170                                     label.remove();
1171                                 }
1172                             }
1173                         }
1174                         else {
1175                             var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1176
1177                             form.find('[name=lat]').val(cookieValue.NLat);
1178                             form.find('[name=lon]').val(cookieValue.NLon);
1179                             form.find('[name=location_ns]').val(cookieValue.NLNS);
1180                             form.find('[name=location_id]').val(cookieValue.NLID);
1181                             form.find('[name=notice_data-geo]').attr('checked', cookieValue.NDG);
1182
1183                             SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1184                             label
1185                                 .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1186                                 .addClass('checked');
1187                         }
1188                     }
1189                     else {
1190                         removeNoticeDataGeo();
1191                     }
1192                 }).change();
1193             }
1194         },
1195
1196         /**
1197          * Create or update a geolocation status widget in this notice posting form.
1198          *
1199          * @param {jQuery} form
1200          * @param {String} status
1201          * @param {String} lat (optional)
1202          * @param {String} lon (optional)
1203          * @param {String} url (optional)
1204          */
1205         NoticeGeoStatus: function(form, status, lat, lon, url)
1206         {
1207             var wrapper = form.find('.geo_status_wrapper');
1208             if (wrapper.length == 0) {
1209                 wrapper = $('<div class="'+SN.C.S.Success+' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1210                 wrapper.find('button.close').click(function() {
1211                     form.find('[name=notice_data-geo]').removeAttr('checked').change();
1212                     return false;
1213                 });
1214                 form.append(wrapper);
1215             }
1216             var label;
1217             if (url) {
1218                 label = $('<a></a>').attr('href', url);
1219             } else {
1220                 label = $('<span></span>');
1221             }
1222             label.text(status);
1223             if (lat || lon) {
1224                 var latlon = lat + ';' + lon;
1225                 label.attr('title', latlon);
1226                 if (!status) {
1227                     label.text(latlon)
1228                 }
1229             }
1230             wrapper.find('.geo_status').empty().append(label);
1231         },
1232
1233         /**
1234          * Setup function -- DOES NOT trigger actions immediately.
1235          *
1236          * Initializes event handlers for the "Send direct message" link on
1237          * profile pages, setting it up to display a dialog box when clicked.
1238          *
1239          * Unlike the repeat confirmation form, this appears to fetch
1240          * the form _from the original link target_, so the form itself
1241          * doesn't need to be in the current document.
1242          *
1243          * @fixme breaks ability to open link in new window?
1244          */
1245         NewDirectMessage: function() {
1246             NDM = $('.entity_send-a-message a');
1247             NDM.attr({'href':NDM.attr('href')+'&ajax=1'});
1248             NDM.bind('click', function() {
1249                 var NDMF = $('.entity_send-a-message form');
1250                 if (NDMF.length === 0) {
1251                     $(this).addClass(SN.C.S.Processing);
1252                     $.get(NDM.attr('href'), null, function(data) {
1253                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1254                         NDMF = $('.entity_send-a-message .form_notice');
1255                         SN.U.FormNoticeXHR(NDMF);
1256                         SN.U.FormNoticeEnhancements(NDMF);
1257                         NDMF.append('<button class="close">&#215;</button>');
1258                         $('.entity_send-a-message button').click(function(){
1259                             NDMF.hide();
1260                             return false;
1261                         });
1262                         NDM.removeClass(SN.C.S.Processing);
1263                     });
1264                 }
1265                 else {
1266                     NDMF.show();
1267                     $('.entity_send-a-message textarea').focus();
1268                 }
1269                 return false;
1270             });
1271         },
1272
1273         /**
1274          * Return a date object with the current local time on the
1275          * given year, month, and day.
1276          *
1277          * @param {number} year: 4-digit year
1278          * @param {number} month: 0 == January
1279          * @param {number} day: 1 == 1
1280          * @return {Date}
1281          */
1282         GetFullYear: function(year, month, day) {
1283             var date = new Date();
1284             date.setFullYear(year, month, day);
1285
1286             return date;
1287         },
1288
1289         /**
1290          * Some sort of object interface for storing some structured
1291          * information in a cookie.
1292          *
1293          * Appears to be used to save the last-used login nickname?
1294          * That's something that browsers usually take care of for us
1295          * these days, do we really need to do it? Does anything else
1296          * use this interface?
1297          *
1298          * @fixme what is this?
1299          * @fixme should this use non-cookie local storage when available?
1300          */
1301         StatusNetInstance: {
1302             /**
1303              * @fixme what is this?
1304              */
1305             Set: function(value) {
1306                 var SNI = SN.U.StatusNetInstance.Get();
1307                 if (SNI !== null) {
1308                     value = $.extend(SNI, value);
1309                 }
1310
1311                 $.cookie(
1312                     SN.C.S.StatusNetInstance,
1313                     JSON.stringify(value),
1314                     {
1315                         path: '/',
1316                         expires: SN.U.GetFullYear(2029, 0, 1)
1317                     });
1318             },
1319
1320             /**
1321              * @fixme what is this?
1322              */
1323             Get: function() {
1324                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1325                 if (cookieValue !== null) {
1326                     return JSON.parse(cookieValue);
1327                 }
1328                 return null;
1329             },
1330
1331             /**
1332              * @fixme what is this?
1333              */
1334             Delete: function() {
1335                 $.cookie(SN.C.S.StatusNetInstance, null);
1336             }
1337         },
1338
1339         /**
1340          * Check if the current page is a timeline where the current user's
1341          * posts should be displayed immediately on success.
1342          *
1343          * @fixme this should be done in a saner way, with machine-readable
1344          * info about what page we're looking at.
1345          *
1346          * @param {DOMElement} notice: HTML chunk with formatted notice
1347          * @return boolean
1348          */
1349         belongsOnTimeline: function(notice) {
1350             var action = $("body").attr('id');
1351             if (action == 'public') {
1352                 return true;
1353             }
1354
1355             var profileLink = $('#nav_profile a').attr('href');
1356             if (profileLink) {
1357                 var authorUrl = $(notice).find('.vcard.author a.url').attr('href');
1358                 if (authorUrl == profileLink) {
1359                     if (action == 'all' || action == 'showstream') {
1360                         // Posts always show on your own friends and profile streams.
1361                         return true;
1362                     }
1363                 }
1364             }
1365
1366             // @fixme tag, group, reply timelines should be feasible as well.
1367             // Mismatch between id-based and name-based user/group links currently complicates
1368             // the lookup, since all our inline mentions contain the absolute links but the
1369             // UI links currently on the page use malleable names.
1370
1371             return false;
1372         },
1373
1374         /**
1375          * Switch to another active input sub-form.
1376          * This will hide the current form (if any), show the new one, and
1377          * update the input type tab selection state.
1378          *
1379          * @param {String} tag
1380          */
1381         switchInputFormTab: function(tag) {
1382             // The one that's current isn't current anymore
1383             $('.input_form_nav_tab.current').removeClass('current');
1384             if (tag == 'placeholder') {
1385                 // Hack: when showing the placeholder, mark the tab
1386                 // as current for 'Status'.
1387                 $('#input_form_nav_status').addClass('current');
1388             } else {
1389                 $('#input_form_nav_'+tag).addClass('current');
1390             }
1391
1392             // Don't remove 'current' if we also have the "nonav" class.
1393             // An example would be the message input form. removing
1394             // 'current' will cause the form to vanish from the page.
1395             var nonav = $('.input_form.current.nonav');
1396             if (nonav.length > 0) {
1397                 return;
1398             }
1399
1400             $('.input_form.current').removeClass('current');
1401             $('#input_form_'+tag)
1402                 .addClass('current')
1403                 .find('.ajax-notice').each(function() {
1404                     var form = $(this);
1405                     SN.Init.NoticeFormSetup(form);
1406                 })
1407                 .find('textarea:first').focus();
1408         }
1409     },
1410
1411     Init: {
1412         /**
1413          * If user is logged in, run setup code for the new notice form:
1414          *
1415          *  - char counter
1416          *  - AJAX submission
1417          *  - location events
1418          *  - file upload events
1419          */
1420         NoticeForm: function() {
1421             if ($('body.user_in').length > 0) {
1422                 // SN.Init.NoticeFormSetup() will get run
1423                 // when forms get displayed for the first time...
1424
1425                 // Hack to initialize the placeholder at top
1426                 $('#input_form_placeholder input.placeholder').focus(function() {
1427                     SN.U.switchInputFormTab("status");
1428                 });
1429
1430                 // Make inline reply forms self-close when clicking out.
1431                 $('body').bind('click', function(e) {
1432                     var currentForm = $('#content .input_forms div.current');
1433                     if (currentForm.length > 0) {
1434                         if ($('#content .input_forms').has(e.target).length == 0) {
1435                             // If all fields are empty, switch back to the placeholder.
1436                             var fields = currentForm.find('textarea, input[type=text], input[type=""]');
1437                             var anything = false;
1438                             fields.each(function() {
1439                                 anything = anything || $(this).val();
1440                             });
1441                             if (!anything) {
1442                                 SN.U.switchInputFormTab("placeholder");
1443                             }
1444                         }
1445                     }
1446
1447                     var openReplies = $('li.notice-reply');
1448                     if (openReplies.length > 0) {
1449                         var target = $(e.target);
1450                         openReplies.each(function() {
1451                             // Did we click outside this one?
1452                             var replyItem = $(this);
1453                             if (replyItem.has(e.target).length == 0) {
1454                                 var textarea = replyItem.find('.notice_data-text:first');
1455                                 var cur = $.trim(textarea.val());
1456                                 // Only close if there's been no edit.
1457                                 if (cur == '' || cur == textarea.data('initialText')) {
1458                                     var parentNotice = replyItem.closest('li.notice');
1459                                     replyItem.remove();
1460                                     parentNotice.find('li.notice-reply-placeholder').show();
1461                                 }
1462                             }
1463                         });
1464                     }
1465                 });
1466             }
1467         },
1468
1469         /**
1470          * Encapsulate notice form setup for a single form.
1471          * Plugins can add extra setup by monkeypatching this
1472          * function.
1473          *
1474          * @param {jQuery} form
1475          */
1476         NoticeFormSetup: function(form) {
1477             if (!form.data('NoticeFormSetup')) {
1478                 SN.U.NoticeLocationAttach(form);
1479                 SN.U.FormNoticeXHR(form);
1480                 SN.U.FormNoticeEnhancements(form);
1481                 SN.U.NoticeDataAttach(form);
1482                 form.data('NoticeFormSetup', true);
1483             }
1484         },
1485
1486         /**
1487          * Run setup code for notice timeline views items:
1488          *
1489          * - AJAX submission for fave/repeat/reply (if logged in)
1490          * - Attachment link extras ('more' links)
1491          */
1492         Notices: function() {
1493             if ($('body.user_in').length > 0) {
1494                 var masterForm = $('.form_notice:first');
1495                 if (masterForm.length > 0) {
1496                     SN.C.I.NoticeFormMaster = document._importNode(masterForm[0], true);
1497                 }
1498                 SN.U.NoticeRepeat();
1499                 SN.U.NoticeReply();
1500                 SN.U.NoticeInlineReplySetup();
1501             }
1502
1503             SN.U.NoticeAttachments();
1504         },
1505
1506         /**
1507          * Run setup code for user & group profile page header area if logged in:
1508          *
1509          * - AJAX submission for sub/unsub/join/leave/nudge
1510          * - AJAX form popup for direct-message
1511          */
1512         EntityActions: function() {
1513             if ($('body.user_in').length > 0) {
1514                 $('.form_user_subscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1515                 $('.form_user_unsubscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1516                 $('.form_group_join').live('click', function() { SN.U.FormXHR($(this)); return false; });
1517                 $('.form_group_leave').live('click', function() { SN.U.FormXHR($(this)); return false; });
1518                 $('.form_user_nudge').live('click', function() { SN.U.FormXHR($(this)); return false; });
1519                 $('.form_peopletag_subscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1520                 $('.form_peopletag_unsubscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1521                 $('.form_user_add_peopletag').live('click', function() { SN.U.FormXHR($(this)); return false; });
1522                 $('.form_user_remove_peopletag').live('click', function() { SN.U.FormXHR($(this)); return false; });
1523
1524                 SN.U.NewDirectMessage();
1525             }
1526         },
1527
1528         ProfileSearch: function() {
1529             if ($('body.user_in').length > 0) {
1530                 $('.form_peopletag_edit_user_search input.submit').live('click', function() {
1531                     SN.U.FormProfileSearchXHR($(this).parents('form')); return false;
1532                 });
1533             }
1534         },
1535
1536         /**
1537          * Run setup code for login form:
1538          *
1539          * - loads saved last-used-nickname from cookie
1540          * - sets event handler to save nickname to cookie on submit
1541          *
1542          * @fixme is this necessary? Browsers do their own form saving these days.
1543          */
1544         Login: function() {
1545             if (SN.U.StatusNetInstance.Get() !== null) {
1546                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1547                 if (nickname !== null) {
1548                     $('#form_login #nickname').val(nickname);
1549                 }
1550             }
1551
1552             $('#form_login').bind('submit', function() {
1553                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1554                 return true;
1555             });
1556         },
1557
1558         /**
1559          * Called when a people tag edit box is shown in the interface
1560          *
1561          * - loads the jQuery UI autocomplete plugin
1562          * - sets event handlers for tag completion
1563          *
1564          */
1565         PeopletagAutocomplete: function(txtBox) {
1566             var split = function(val) {
1567                 return val.split( /\s+/ );
1568             }
1569             var extractLast = function(term) {
1570                 return split(term).pop();
1571             }
1572
1573             // don't navigate away from the field on tab when selecting an item
1574             txtBox.live( "keydown", function( event ) {
1575                 if ( event.keyCode === $.ui.keyCode.TAB &&
1576                         $(this).data( "autocomplete" ).menu.active ) {
1577                     event.preventDefault();
1578                 }
1579             }).autocomplete({
1580                 minLength: 0,
1581                 source: function(request, response) {
1582                             // delegate back to autocomplete, but extract the last term
1583                             response($.ui.autocomplete.filter(
1584                                     SN.C.PtagACData, extractLast(request.term)));
1585                     },
1586                     focus: function() {
1587                         return false;
1588                 },
1589                     select: function(event, ui) {
1590                             var terms = split(this.value);
1591                             terms.pop();
1592                             terms.push(ui.item.value);
1593                             terms.push("");
1594                             this.value = terms.join(" ");
1595                             return false;
1596                     }
1597             }).data('autocomplete')._renderItem = function(ul, item) {
1598                     // FIXME: with jQuery UI you cannot have it highlight the match
1599                     var _l = '<a class="ptag-ac-line-tag">' + item.tag
1600                           + ' <em class="privacy_mode">' + item.mode + '</em>'
1601                           + '<span class="freq">' + item.freq + '</span></a>'
1602
1603                             return $("<li/>")
1604                                 .addClass('mode-' + item.mode)
1605                             .addClass('ptag-ac-line')
1606                             .data("item.autocomplete", item)
1607                             .append(_l)
1608                             .appendTo(ul);
1609                     }
1610         },
1611
1612         /**
1613          * Run setup for the ajax people tags editor
1614          *
1615          * - show edit button
1616          * - set event handle for click on edit button
1617          *   - loads people tag autocompletion data if not already present
1618          *     or if it is stale.
1619          *
1620          */
1621         PeopleTags: function() {
1622             $('.user_profile_tags .editable').append($('<button class="peopletags_edit_button"/>'));
1623
1624             $('.peopletags_edit_button').live('click', function() {
1625                 var form = $(this).parents('dd').eq(0).find('form');
1626                 // We can buy time from the above animation
1627
1628                 $.ajax({
1629                     url: _peopletagAC,
1630                     dataType: 'json',
1631                     data: {token: $('#token').val()},
1632                     ifModified: true,
1633                     success: function(data) {
1634                         // item.label is used to match
1635                         for (i=0; i < data.length; i++) {
1636                             data[i].label = data[i].tag;
1637                         }
1638
1639                         SN.C.PtagACData = data;
1640                         SN.Init.PeopletagAutocomplete(form.find('#tags'));
1641                     }
1642                 });
1643
1644                 $(this).parents('ul').eq(0).fadeOut(200, function() {form.fadeIn(200).find('input#tags')});
1645             });
1646
1647             $('.user_profile_tags form .submit').live('click', function() {
1648                 SN.U.FormPeopletagsXHR($(this).parents('form')); return false;
1649             });
1650         },
1651
1652         /**
1653          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1654          */
1655         AjaxForms: function() {
1656             $('form.ajax').live('submit', function() {
1657                 SN.U.FormXHR($(this));
1658                 return false;
1659             });
1660             $('form.ajax input[type=submit]').live('click', function() {
1661                 // Some forms rely on knowing which submit button was clicked.
1662                 // Save a hidden input field which'll be picked up during AJAX
1663                 // submit...
1664                 var button = $(this);
1665                 var form = button.closest('form');
1666                 form.find('.hidden-submit-button').remove();
1667                 $('<input class="hidden-submit-button" type="hidden" />')
1668                     .attr('name', button.attr('name'))
1669                     .val(button.val())
1670                     .appendTo(form);
1671             });
1672         },
1673
1674         /**
1675          * Add logic to any file upload forms to handle file size limits,
1676          * on browsers that support basic FileAPI.
1677          */
1678         UploadForms: function () {
1679             $('input[type=file]').change(function(event) {
1680                 if (typeof this.files == "object" && this.files.length > 0) {
1681                     var size = 0;
1682                     for (var i = 0; i < this.files.length; i++) {
1683                         size += this.files[i].size;
1684                     }
1685
1686                     var max = SN.U.maxFileSize($(this.form));
1687                     if (max > 0 && size > max) {
1688                         var msg = 'File too large: maximum upload size is %d bytes.';
1689                         alert(msg.replace('%d', max));
1690
1691                         // Clear the files.
1692                         $(this).val('');
1693                         event.preventDefault();
1694                         return false;
1695                     }
1696                 }
1697             });
1698         },
1699
1700         CheckBoxes: function() {
1701             $("span[class='checkbox-wrapper']").addClass("unchecked");
1702             $(".checkbox-wrapper").click(function(){
1703                 if($(this).children("input").attr("checked")){
1704                     // uncheck
1705                     $(this).children("input").attr({checked: ""});
1706                     $(this).removeClass("checked");
1707                     $(this).addClass("unchecked");
1708                     $(this).children("label").text("Private?");
1709                 }else{
1710                     // check
1711                     $(this).children("input").attr({checked: "checked"});
1712                     $(this).removeClass("unchecked");
1713                     $(this).addClass("checked");
1714                     $(this).children("label").text("Private");
1715                 }
1716             });
1717         }
1718     }
1719 };
1720
1721 /**
1722  * Run initialization functions on DOM-ready.
1723  *
1724  * Note that if we're waiting on other scripts to load, this won't happen
1725  * until that's done. To load scripts asynchronously without delaying setup,
1726  * don't start them loading until after DOM-ready time!
1727  */
1728 $(document).ready(function(){
1729     SN.Init.AjaxForms();
1730     SN.Init.UploadForms();
1731     SN.Init.CheckBoxes();
1732     if ($('.'+SN.C.S.FormNotice).length > 0) {
1733         SN.Init.NoticeForm();
1734     }
1735     if ($('#content .notices').length > 0) {
1736         SN.Init.Notices();
1737     }
1738     if ($('#content .entity_actions').length > 0) {
1739         SN.Init.EntityActions();
1740     }
1741     if ($('#form_login').length > 0) {
1742         SN.Init.Login();
1743     }
1744     if ($('#profile_search_results').length > 0) {
1745         SN.Init.ProfileSearch();
1746     }
1747     if ($('.user_profile_tags .editable').length > 0) {
1748         SN.Init.PeopleTags();
1749     }
1750 });
1751