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             $.ajax({
 516                 type: 'POST',
 517                 dataType: 'xml',
 518                 url: form.attr('action'),
 519                 data: form.serialize() + '&ajax=1',
 520                 beforeSend: function(xhr) {
 521                     form.addClass(SN.C.S.Processing)
 522                         .find('.submit')
 523                             .addClass(SN.C.S.Disabled)
 524                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 525                 },
 526                 error: function (xhr, textStatus, errorThrown) {
 527                     alert(errorThrown || textStatus);
 528                 },
 529                 success: function(data, textStatus) {
 530                     var results_placeholder = form.parents('.entity_tags');
 531                     if (typeof($('.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
 659                 // Set focus...
 660                 var text = replyForm.find('textarea');
 661                 if (text.length == 0) {
 662                     throw "No textarea";
 663                 }
 664                 var replyto = '';
 665                 if (initialText) {
 666                     replyto = initialText + ' ';
 667                 }
 668                 text.val(replyto + text.val().replace(RegExp(replyto, 'i'), ''));
 669                 text.data('initialText', $.trim(initialText + ''));
 670                 text.focus();
 671                 if (text[0].setSelectionRange) {
 672                     var len = text.val().length;
 673                     text[0].setSelectionRange(len,len);
 674                 }
 675             };
 676             if (replyForm.length > 0) {
 677                 // Update the existing form...
 678                 nextStep();
 679             } else {
 680                 // Hide the placeholder...
 681                 var placeholder = list.find('li.notice-reply-placeholder').hide();
 682
 683                 // Create the reply form entry at the end
 684                 var replyItem = $('li.notice-reply', list);
 685                 if (replyItem.length == 0) {
 686                     replyItem = $('<li class="notice-reply"></li>');
 687
 688                     var intermediateStep = function(formMaster) {
 689                         var formEl = document._importNode(formMaster, true);
 690                         replyItem.append(formEl);
 691                         list.append(replyItem); // *after* the placeholder
 692
 693                         var form = replyForm = $(formEl);
 694                         SN.Init.NoticeFormSetup(form);
 695
 696                         nextStep();
 697                     };
 698                     if (SN.C.I.NoticeFormMaster) {
 699                         // We've already saved a master copy of the form.
 700                         // Clone it in!
 701                         intermediateStep(SN.C.I.NoticeFormMaster);
 702                     } else {
 703                         // Fetch a fresh copy of the notice form over AJAX.
 704                         // Warning: this can have a delay, which looks bad.
 705                         // @fixme this fallback may or may not work
 706                         var url = $('#form_notice').attr('action');
 707                         $.get(url, {ajax: 1}, function(data, textStatus, xhr) {
 708                             intermediateStep($('form', data)[0]);
 709                         });
 710                     }
 711                 }
 712             }
 713         },
 714
 715         NoticeInlineReplyPlaceholder: function(notice) {
 716             var list = notice.find('ul.threaded-replies');
 717             var placeholder = $('<li class="notice-reply-placeholder">' +
 718                                     '<input class="placeholder">' +
 719                                 '</li>');
 720             placeholder.find('input')
 721                 .val(SN.msg('reply_placeholder'));
 722             list.append(placeholder);
 723         },
 724
 725         /**
 726          * Setup function -- DOES NOT apply immediately.
 727          *
 728          * Sets up event handlers for inline reply mini-form placeholders.
 729          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 730          */
 731         NoticeInlineReplySetup: function() {
 732             $('li.notice-reply-placeholder input')
 733                 .live('focus', function() {
 734                     var notice = $(this).closest('li.notice');
 735                     SN.U.NoticeInlineReplyTrigger(notice);
 736                     return false;
 737                 });
 738             $('li.notice-reply-comments a')
 739                 .live('click', function() {
 740                     var url = $(this).attr('href');
 741                     var area = $(this).closest('.threaded-replies');
 742                     $.get(url, {ajax: 1}, function(data, textStatus, xhr) {
 743                         var replies = $('.threaded-replies', data);
 744                         if (replies.length) {
 745                             area.replaceWith(document._importNode(replies[0], true));
 746                         }
 747                     });
 748                     return false;
 749                 });
 750         },
 751
 752         /**
 753          * Setup function -- DOES NOT trigger actions immediately.
 754          *
 755          * Sets up event handlers for repeat forms to toss up a confirmation
 756          * popout before submitting.
 757          *
 758          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 759          */
 760         NoticeRepeat: function() {
 761             $('.form_repeat').live('click', function(e) {
 762                 e.preventDefault();
 763
 764                 SN.U.NoticeRepeatConfirmation($(this));
 765                 return false;
 766             });
 767         },
 768
 769         /**
 770          * Shows a confirmation dialog box variant of the repeat button form.
 771          * This seems to use a technique where the repeat form contains
 772          * _both_ a standalone button _and_ text and buttons for a dialog.
 773          * The dialog will close after its copy of the form is submitted,
 774          * or if you click its 'close' button.
 775          *
 776          * The dialog is created by duplicating the original form and changing
 777          * its style; while clever, this is hard to generalize and probably
 778          * duplicates a lot of unnecessary HTML output.
 779          *
 780          * @fixme create confirmation dialogs through a generalized interface
 781          * that can be reused instead of hardcoded text and styles.
 782          *
 783          * @param {jQuery} form
 784          */
 785         NoticeRepeatConfirmation: function(form) {
 786             var submit_i = form.find('.submit');
 787
 788             var submit = submit_i.clone();
 789             submit
 790                 .addClass('submit_dialogbox')
 791                 .removeClass('submit');
 792             form.append(submit);
 793             submit.bind('click', function() { SN.U.FormXHR(form); return false; });
 794
 795             submit_i.hide();
 796
 797             form
 798                 .addClass('dialogbox')
 799                 .append('<button class="close">&#215;</button>')
 800                 .closest('.notice-options')
 801                     .addClass('opaque');
 802
 803             form.find('button.close').click(function(){
 804                 $(this).remove();
 805
 806                 form
 807                     .removeClass('dialogbox')
 808                     .closest('.notice-options')
 809                         .removeClass('opaque');
 810
 811                 form.find('.submit_dialogbox').remove();
 812                 form.find('.submit').show();
 813
 814                 return false;
 815             });
 816         },
 817
 818         /**
 819          * Setup function -- DOES NOT trigger actions immediately.
 820          *
 821          * Goes through all notices currently displayed and sets up attachment
 822          * handling if needed.
 823          */
 824         NoticeAttachments: function() {
 825             $('.notice a.attachment').each(function() {
 826                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 827             });
 828         },
 829
 830         /**
 831          * Setup function -- DOES NOT trigger actions immediately.
 832          *
 833          * Sets up special attachment link handling if needed. Currently this
 834          * consists only of making the "more" button used for OStatus message
 835          * cropping turn into an auto-expansion button that loads the full
 836          * text from an attachment file.
 837          *
 838          * @param {jQuery} notice
 839          */
 840         NoticeWithAttachment: function(notice) {
 841             if (notice.find('.attachment').length === 0) {
 842                 return;
 843             }
 844
 845             var attachment_more = notice.find('.attachment.more');
 846             if (attachment_more.length > 0) {
 847                 $(attachment_more[0]).click(function() {
 848                     var m = $(this);
 849                     m.addClass(SN.C.S.Processing);
 850                     $.get(m.attr('href')+'/ajax', null, function(data) {
 851                         m.parent('.entry-content').html($(data).find('#attachment_view .entry-content').html());
 852                     });
 853
 854                     return false;
 855                 }).attr('title', SN.msg('showmore_tooltip'));
 856             }
 857         },
 858
 859         /**
 860          * Setup function -- DOES NOT trigger actions immediately.
 861          *
 862          * Sets up event handlers for the file-attachment widget in the
 863          * new notice form. When a file is selected, a box will be added
 864          * below the text input showing the filename and, if supported
 865          * by the browser, a thumbnail preview.
 866          *
 867          * This preview box will also allow removing the attachment
 868          * prior to posting.
 869          *
 870          * @param {jQuery} form
 871          */
 872         NoticeDataAttach: function(form) {
 873             var NDA = form.find('input[type=file]');
 874             NDA.change(function(event) {
 875                 form.find('.attach-status').remove();
 876
 877                 var filename = $(this).val();
 878                 if (!filename) {
 879                     // No file -- we've been tricked!
 880                     return false;
 881                 }
 882
 883                 var attachStatus = $('<div class="attach-status '+SN.C.S.Success+'"><code></code> <button class="close">&#215;</button></div>');
 884                 attachStatus.find('code').text(filename);
 885                 attachStatus.find('button').click(function(){
 886                     attachStatus.remove();
 887                     NDA.val('');
 888
 889                     return false;
 890                 });
 891                 form.append(attachStatus);
 892
 893                 if (typeof this.files == "object") {
 894                     // Some newer browsers will let us fetch the files for preview.
 895                     for (var i = 0; i < this.files.length; i++) {
 896                         SN.U.PreviewAttach(form, this.files[i]);
 897                     }
 898                 }
 899             });
 900         },
 901
 902         /**
 903          * Get PHP's MAX_FILE_SIZE setting for this form;
 904          * used to apply client-side file size limit checks.
 905          *
 906          * @param {jQuery} form
 907          * @return int max size in bytes; 0 or negative means no limit
 908          */
 909         maxFileSize: function(form) {
 910             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 911             if (max) {
 912                 return parseInt(max);
 913             } else {
 914                 return 0;
 915             }
 916         },
 917
 918         /**
 919          * For browsers with FileAPI support: make a thumbnail if possible,
 920          * and append it into the attachment display widget.
 921          *
 922          * Known good:
 923          * - Firefox 3.6.6, 4.0b7
 924          * - Chrome 8.0.552.210
 925          *
 926          * Known ok metadata, can't get contents:
 927          * - Safari 5.0.2
 928          *
 929          * Known fail:
 930          * - Opera 10.63, 11 beta (no input.files interface)
 931          *
 932          * @param {jQuery} form
 933          * @param {File} file
 934          *
 935          * @todo use configured thumbnail size
 936          * @todo detect pixel size?
 937          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 938          */
 939         PreviewAttach: function(form, file) {
 940             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 941             var preview = true;
 942
 943             var blobAsDataURL;
 944             if (typeof window.createObjectURL != "undefined") {
 945                 /**
 946                  * createObjectURL lets us reference the file directly from an <img>
 947                  * This produces a compact URL with an opaque reference to the file,
 948                  * which we can reference immediately.
 949                  *
 950                  * - Firefox 3.6.6: no
 951                  * - Firefox 4.0b7: no
 952                  * - Safari 5.0.2: no
 953                  * - Chrome 8.0.552.210: works!
 954                  */
 955                 blobAsDataURL = function(blob, callback) {
 956                     callback(window.createObjectURL(blob));
 957                 }
 958             } else if (typeof window.FileReader != "undefined") {
 959                 /**
 960                  * FileAPI's FileReader can build a data URL from a blob's contents,
 961                  * but it must read the file and build it asynchronously. This means
 962                  * we'll be passing a giant data URL around, which may be inefficient.
 963                  *
 964                  * - Firefox 3.6.6: works!
 965                  * - Firefox 4.0b7: works!
 966                  * - Safari 5.0.2: no
 967                  * - Chrome 8.0.552.210: works!
 968                  */
 969                 blobAsDataURL = function(blob, callback) {
 970                     var reader = new FileReader();
 971                     reader.onload = function(event) {
 972                         callback(reader.result);
 973                     }
 974                     reader.readAsDataURL(blob);
 975                 }
 976             } else {
 977                 preview = false;
 978             }
 979
 980             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 981             if ($.inArray(file.type, imageTypes) == -1) {
 982                 // We probably don't know how to show the file.
 983                 preview = false;
 984             }
 985
 986             var maxSize = 8 * 1024 * 1024;
 987             if (file.size > maxSize) {
 988                 // Don't kill the browser trying to load some giant image.
 989                 preview = false;
 990             }
 991
 992             if (preview) {
 993                 blobAsDataURL(file, function(url) {
 994                     var img = $('<img>')
 995                         .attr('title', tooltip)
 996                         .attr('alt', tooltip)
 997                         .attr('src', url)
 998                         .attr('style', 'height: 120px');
 999                     form.find('.attach-status').append(img);
1000                 });
1001             } else {
1002                 var img = $('<div></div>').text(tooltip);
1003                 form.find('.attach-status').append(img);
1004             }
1005         },
1006
1007         /**
1008          * Setup function -- DOES NOT trigger actions immediately.
1009          *
1010          * Initializes state for the location-lookup features in the
1011          * new-notice form. Seems to set up some event handlers for
1012          * triggering lookups and using the new values.
1013          *
1014          * @param {jQuery} form
1015          *
1016          * @fixme tl;dr
1017          * @fixme there's not good visual state update here, so users have a
1018          *        hard time figuring out if it's working or fixing if it's wrong.
1019          *
1020          */
1021         NoticeLocationAttach: function(form) {
1022             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
1023             var NLat = form.find('[name=lat]')
1024             var NLon = form.find('[name=lon]')
1025             var NLNS = form.find('[name=location_ns]').val();
1026             var NLID = form.find('[name=location_id]').val();
1027             var NLN = ''; // @fixme
1028             var NDGe = form.find('[name=notice_data-geo]');
1029             var check = form.find('[name=notice_data-geo]');
1030             var label = form.find('label.notice_data-geo');
1031
1032             function removeNoticeDataGeo(error) {
1033                 label
1034                     .attr('title', jQuery.trim(label.text()))
1035                     .removeClass('checked');
1036
1037                 form.find('[name=lat]').val('');
1038                 form.find('[name=lon]').val('');
1039                 form.find('[name=location_ns]').val('');
1040                 form.find('[name=location_id]').val('');
1041                 form.find('[name=notice_data-geo]').attr('checked', false);
1042
1043                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1044
1045                 if (error) {
1046                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1047                     form.find('.geo_status_wrapper .geo_status').text(error);
1048                 } else {
1049                     form.find('.geo_status_wrapper').remove();
1050                 }
1051             }
1052
1053             function getJSONgeocodeURL(geocodeURL, data) {
1054                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1055                 $.getJSON(geocodeURL, data, function(location) {
1056                     var lns, lid;
1057
1058                     if (typeof(location.location_ns) != 'undefined') {
1059                         form.find('[name=location_ns]').val(location.location_ns);
1060                         lns = location.location_ns;
1061                     }
1062
1063                     if (typeof(location.location_id) != 'undefined') {
1064                         form.find('[name=location_id]').val(location.location_id);
1065                         lid = location.location_id;
1066                     }
1067
1068                     if (typeof(location.name) == 'undefined') {
1069                         NLN_text = data.lat + ';' + data.lon;
1070                     }
1071                     else {
1072                         NLN_text = location.name;
1073                     }
1074
1075                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1076                     label
1077                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1078
1079                     form.find('[name=lat]').val(data.lat);
1080                     form.find('[name=lon]').val(data.lon);
1081                     form.find('[name=location_ns]').val(lns);
1082                     form.find('[name=location_id]').val(lid);
1083                     form.find('[name=notice_data-geo]').attr('checked', true);
1084
1085                     var cookieValue = {
1086                         NLat: data.lat,
1087                         NLon: data.lon,
1088                         NLNS: lns,
1089                         NLID: lid,
1090                         NLN: NLN_text,
1091                         NLNU: location.url,
1092                         NDG: true
1093                     };
1094
1095                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1096                 });
1097             }
1098
1099             if (check.length > 0) {
1100                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1101                     check.attr('checked', false);
1102                 }
1103                 else {
1104                     check.attr('checked', true);
1105                 }
1106
1107                 var NGW = form.find('.notice_data-geo_wrap');
1108                 var geocodeURL = NGW.attr('data-api');
1109
1110                 label
1111                     .attr('title', label.text());
1112
1113                 check.change(function() {
1114                     if (check.attr('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1115                         label
1116                             .attr('title', NoticeDataGeo_text.ShareDisable)
1117                             .addClass('checked');
1118
1119                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1120                             if (navigator.geolocation) {
1121                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1122                                 navigator.geolocation.getCurrentPosition(
1123                                     function(position) {
1124                                         form.find('[name=lat]').val(position.coords.latitude);
1125                                         form.find('[name=lon]').val(position.coords.longitude);
1126
1127                                         var data = {
1128                                             lat: position.coords.latitude,
1129                                             lon: position.coords.longitude,
1130                                             token: $('#token').val()
1131                                         };
1132
1133                                         getJSONgeocodeURL(geocodeURL, data);
1134                                     },
1135
1136                                     function(error) {
1137                                         switch(error.code) {
1138                                             case error.PERMISSION_DENIED:
1139                                                 removeNoticeDataGeo('Location permission denied.');
1140                                                 break;
1141                                             case error.TIMEOUT:
1142                                                 //$('#'+SN.C.S.NoticeDataGeo).attr('checked', false);
1143                                                 removeNoticeDataGeo('Location lookup timeout.');
1144                                                 break;
1145                                         }
1146                                     },
1147
1148                                     {
1149                                         timeout: 10000
1150                                     }
1151                                 );
1152                             }
1153                             else {
1154                                 if (NLat.length > 0 && NLon.length > 0) {
1155                                     var data = {
1156                                         lat: NLat,
1157                                         lon: NLon,
1158                                         token: $('#token').val()
1159                                     };
1160
1161                                     getJSONgeocodeURL(geocodeURL, data);
1162                                 }
1163                                 else {
1164                                     removeNoticeDataGeo();
1165                                     check.remove();
1166                                     label.remove();
1167                                 }
1168                             }
1169                         }
1170                         else {
1171                             var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1172
1173                             form.find('[name=lat]').val(cookieValue.NLat);
1174                             form.find('[name=lon]').val(cookieValue.NLon);
1175                             form.find('[name=location_ns]').val(cookieValue.NLNS);
1176                             form.find('[name=location_id]').val(cookieValue.NLID);
1177                             form.find('[name=notice_data-geo]').attr('checked', cookieValue.NDG);
1178
1179                             SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1180                             label
1181                                 .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1182                                 .addClass('checked');
1183                         }
1184                     }
1185                     else {
1186                         removeNoticeDataGeo();
1187                     }
1188                 }).change();
1189             }
1190         },
1191
1192         /**
1193          * Create or update a geolocation status widget in this notice posting form.
1194          *
1195          * @param {jQuery} form
1196          * @param {String} status
1197          * @param {String} lat (optional)
1198          * @param {String} lon (optional)
1199          * @param {String} url (optional)
1200          */
1201         NoticeGeoStatus: function(form, status, lat, lon, url)
1202         {
1203             var wrapper = form.find('.geo_status_wrapper');
1204             if (wrapper.length == 0) {
1205                 wrapper = $('<div class="'+SN.C.S.Success+' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1206                 wrapper.find('button.close').click(function() {
1207                     form.find('[name=notice_data-geo]').removeAttr('checked').change();
1208                     return false;
1209                 });
1210                 form.append(wrapper);
1211             }
1212             var label;
1213             if (url) {
1214                 label = $('<a></a>').attr('href', url);
1215             } else {
1216                 label = $('<span></span>');
1217             }
1218             label.text(status);
1219             if (lat || lon) {
1220                 var latlon = lat + ';' + lon;
1221                 label.attr('title', latlon);
1222                 if (!status) {
1223                     label.text(latlon)
1224                 }
1225             }
1226             wrapper.find('.geo_status').empty().append(label);
1227         },
1228
1229         /**
1230          * Setup function -- DOES NOT trigger actions immediately.
1231          *
1232          * Initializes event handlers for the "Send direct message" link on
1233          * profile pages, setting it up to display a dialog box when clicked.
1234          *
1235          * Unlike the repeat confirmation form, this appears to fetch
1236          * the form _from the original link target_, so the form itself
1237          * doesn't need to be in the current document.
1238          *
1239          * @fixme breaks ability to open link in new window?
1240          */
1241         NewDirectMessage: function() {
1242             NDM = $('.entity_send-a-message a');
1243             NDM.attr({'href':NDM.attr('href')+'&ajax=1'});
1244             NDM.bind('click', function() {
1245                 var NDMF = $('.entity_send-a-message form');
1246                 if (NDMF.length === 0) {
1247                     $(this).addClass(SN.C.S.Processing);
1248                     $.get(NDM.attr('href'), null, function(data) {
1249                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1250                         NDMF = $('.entity_send-a-message .form_notice');
1251                         SN.U.FormNoticeXHR(NDMF);
1252                         SN.U.FormNoticeEnhancements(NDMF);
1253                         NDMF.append('<button class="close">&#215;</button>');
1254                         $('.entity_send-a-message button').click(function(){
1255                             NDMF.hide();
1256                             return false;
1257                         });
1258                         NDM.removeClass(SN.C.S.Processing);
1259                     });
1260                 }
1261                 else {
1262                     NDMF.show();
1263                     $('.entity_send-a-message textarea').focus();
1264                 }
1265                 return false;
1266             });
1267         },
1268
1269         /**
1270          * Return a date object with the current local time on the
1271          * given year, month, and day.
1272          *
1273          * @param {number} year: 4-digit year
1274          * @param {number} month: 0 == January
1275          * @param {number} day: 1 == 1
1276          * @return {Date}
1277          */
1278         GetFullYear: function(year, month, day) {
1279             var date = new Date();
1280             date.setFullYear(year, month, day);
1281
1282             return date;
1283         },
1284
1285         /**
1286          * Some sort of object interface for storing some structured
1287          * information in a cookie.
1288          *
1289          * Appears to be used to save the last-used login nickname?
1290          * That's something that browsers usually take care of for us
1291          * these days, do we really need to do it? Does anything else
1292          * use this interface?
1293          *
1294          * @fixme what is this?
1295          * @fixme should this use non-cookie local storage when available?
1296          */
1297         StatusNetInstance: {
1298             /**
1299              * @fixme what is this?
1300              */
1301             Set: function(value) {
1302                 var SNI = SN.U.StatusNetInstance.Get();
1303                 if (SNI !== null) {
1304                     value = $.extend(SNI, value);
1305                 }
1306
1307                 $.cookie(
1308                     SN.C.S.StatusNetInstance,
1309                     JSON.stringify(value),
1310                     {
1311                         path: '/',
1312                         expires: SN.U.GetFullYear(2029, 0, 1)
1313                     });
1314             },
1315
1316             /**
1317              * @fixme what is this?
1318              */
1319             Get: function() {
1320                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1321                 if (cookieValue !== null) {
1322                     return JSON.parse(cookieValue);
1323                 }
1324                 return null;
1325             },
1326
1327             /**
1328              * @fixme what is this?
1329              */
1330             Delete: function() {
1331                 $.cookie(SN.C.S.StatusNetInstance, null);
1332             }
1333         },
1334
1335         /**
1336          * Check if the current page is a timeline where the current user's
1337          * posts should be displayed immediately on success.
1338          *
1339          * @fixme this should be done in a saner way, with machine-readable
1340          * info about what page we're looking at.
1341          *
1342          * @param {DOMElement} notice: HTML chunk with formatted notice
1343          * @return boolean
1344          */
1345         belongsOnTimeline: function(notice) {
1346             var action = $("body").attr('id');
1347             if (action == 'public') {
1348                 return true;
1349             }
1350
1351             var profileLink = $('#nav_profile a').attr('href');
1352             if (profileLink) {
1353                 var authorUrl = $(notice).find('.vcard.author a.url').attr('href');
1354                 if (authorUrl == profileLink) {
1355                     if (action == 'all' || action == 'showstream') {
1356                         // Posts always show on your own friends and profile streams.
1357                         return true;
1358                     }
1359                 }
1360             }
1361
1362             // @fixme tag, group, reply timelines should be feasible as well.
1363             // Mismatch between id-based and name-based user/group links currently complicates
1364             // the lookup, since all our inline mentions contain the absolute links but the
1365             // UI links currently on the page use malleable names.
1366
1367             return false;
1368         },
1369
1370         /**
1371          * Switch to another active input sub-form.
1372          * This will hide the current form (if any), show the new one, and
1373          * update the input type tab selection state.
1374          *
1375          * @param {String} tag
1376          */
1377         switchInputFormTab: function(tag) {
1378             // The one that's current isn't current anymore
1379             $('.input_form_nav_tab.current').removeClass('current');
1380             if (tag == 'placeholder') {
1381                 // Hack: when showing the placeholder, mark the tab
1382                 // as current for 'Status'.
1383                 $('#input_form_nav_status').addClass('current');
1384             } else {
1385                 $('#input_form_nav_'+tag).addClass('current');
1386             }
1387
1388             $('.input_form.current').removeClass('current');
1389             $('#input_form_'+tag)
1390                 .addClass('current')
1391                 .find('.ajax-notice').each(function() {
1392                     var form = $(this);
1393                     SN.Init.NoticeFormSetup(form);
1394                 })
1395                 .find('textarea:first').focus();
1396         }
1397     },
1398
1399     Init: {
1400         /**
1401          * If user is logged in, run setup code for the new notice form:
1402          *
1403          *  - char counter
1404          *  - AJAX submission
1405          *  - location events
1406          *  - file upload events
1407          */
1408         NoticeForm: function() {
1409             if ($('body.user_in').length > 0) {
1410                 // SN.Init.NoticeFormSetup() will get run
1411                 // when forms get displayed for the first time...
1412
1413                 // Hack to initialize the placeholder at top
1414                 $('#input_form_placeholder input.placeholder').focus(function() {
1415                     SN.U.switchInputFormTab("status");
1416                 });
1417
1418                 // Make inline reply forms self-close when clicking out.
1419                 $('body').bind('click', function(e) {
1420                     var currentForm = $('#content .input_forms div.current');
1421                     if (currentForm.length > 0) {
1422                         if ($('#content .input_forms').has(e.target).length == 0) {
1423                             // If all fields are empty, switch back to the placeholder.
1424                             var fields = currentForm.find('textarea, input[type=text], input[type=""]');
1425                             var anything = false;
1426                             fields.each(function() {
1427                                 anything = anything || $(this).val();
1428                             });
1429                             if (!anything) {
1430                                 SN.U.switchInputFormTab("placeholder");
1431                             }
1432                         }
1433                     }
1434
1435                     var openReplies = $('li.notice-reply');
1436                     if (openReplies.length > 0) {
1437                         var target = $(e.target);
1438                         openReplies.each(function() {
1439                             // Did we click outside this one?
1440                             var replyItem = $(this);
1441                             if (replyItem.has(e.target).length == 0) {
1442                                 var textarea = replyItem.find('.notice_data-text:first');
1443                                 var cur = $.trim(textarea.val());
1444                                 // Only close if there's been no edit.
1445                                 if (cur == '' || cur == textarea.data('initialText')) {
1446                                     var parentNotice = replyItem.closest('li.notice');
1447                                     replyItem.remove();
1448                                     parentNotice.find('li.notice-reply-placeholder').show();
1449                                 }
1450                             }
1451                         });
1452                     }
1453                 });
1454             }
1455         },
1456
1457         /**
1458          * Encapsulate notice form setup for a single form.
1459          * Plugins can add extra setup by monkeypatching this
1460          * function.
1461          *
1462          * @param {jQuery} form
1463          */
1464         NoticeFormSetup: function(form) {
1465             if (!form.data('NoticeFormSetup')) {
1466                 SN.U.NoticeLocationAttach(form);
1467                 SN.U.FormNoticeXHR(form);
1468                 SN.U.FormNoticeEnhancements(form);
1469                 SN.U.NoticeDataAttach(form);
1470                 form.data('NoticeFormSetup', true);
1471             }
1472         },
1473
1474         /**
1475          * Run setup code for notice timeline views items:
1476          *
1477          * - AJAX submission for fave/repeat/reply (if logged in)
1478          * - Attachment link extras ('more' links)
1479          */
1480         Notices: function() {
1481             if ($('body.user_in').length > 0) {
1482                 var masterForm = $('.form_notice:first');
1483                 if (masterForm.length > 0) {
1484                     SN.C.I.NoticeFormMaster = document._importNode(masterForm[0], true);
1485                 }
1486                 SN.U.NoticeRepeat();
1487                 SN.U.NoticeReply();
1488                 SN.U.NoticeInlineReplySetup();
1489             }
1490
1491             SN.U.NoticeAttachments();
1492         },
1493
1494         /**
1495          * Run setup code for user & group profile page header area if logged in:
1496          *
1497          * - AJAX submission for sub/unsub/join/leave/nudge
1498          * - AJAX form popup for direct-message
1499          */
1500         EntityActions: function() {
1501             if ($('body.user_in').length > 0) {
1502                 $('.form_user_subscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1503                 $('.form_user_unsubscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1504                 $('.form_group_join').live('click', function() { SN.U.FormXHR($(this)); return false; });
1505                 $('.form_group_leave').live('click', function() { SN.U.FormXHR($(this)); return false; });
1506                 $('.form_user_nudge').live('click', function() { SN.U.FormXHR($(this)); return false; });
1507                 $('.form_peopletag_subscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1508                 $('.form_peopletag_unsubscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1509                 $('.form_user_add_peopletag').live('click', function() { SN.U.FormXHR($(this)); return false; });
1510                 $('.form_user_remove_peopletag').live('click', function() { SN.U.FormXHR($(this)); return false; });
1511
1512                 SN.U.NewDirectMessage();
1513             }
1514         },
1515
1516         ProfileSearch: function() {
1517             if ($('body.user_in').length > 0) {
1518                 $('.form_peopletag_edit_user_search input.submit').live('click', function() {
1519                     SN.U.FormProfileSearchXHR($(this).parents('form')); return false;
1520                 });
1521             }
1522         },
1523
1524         /**
1525          * Run setup code for login form:
1526          *
1527          * - loads saved last-used-nickname from cookie
1528          * - sets event handler to save nickname to cookie on submit
1529          *
1530          * @fixme is this necessary? Browsers do their own form saving these days.
1531          */
1532         Login: function() {
1533             if (SN.U.StatusNetInstance.Get() !== null) {
1534                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1535                 if (nickname !== null) {
1536                     $('#form_login #nickname').val(nickname);
1537                 }
1538             }
1539
1540             $('#form_login').bind('submit', function() {
1541                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1542                 return true;
1543             });
1544         },
1545
1546         PeopletagAutocomplete: function() {
1547             $('.form_tag_user #tags').tagInput({
1548                 tags: SN.C.PtagACData,
1549                 tagSeparator: " ",
1550                 animate: false,
1551                 formatLine: function (i, e, search, matches) {
1552                   var tag = "<b>" + e.tag.substring(0, search.length) + "</b>" + e.tag.substring(search.length);
1553
1554                   var line = $("<div/>").addClass('mode-' + e.mode);
1555                     line.append($("<div class='tagInputLineTag'>" + tag
1556                         + " <em class='privacy_mode'>" + e.mode + "</em></div>"));
1557                   if (e.freq)
1558                     line.append("<div class='tagInputLineFreq'>" + e.freq + "</div>");
1559                   return line;
1560                 }
1561             });
1562         },
1563
1564         PeopleTags: function() {
1565             $('.user_profile_tags .editable').append($('<button class="peopletags_edit_button"/>'));
1566
1567             $('.peopletags_edit_button').live('click', function() {
1568                 var form = $(this).parents('dd').eq(0).find('form');
1569                 // We can buy time from the above animation
1570                 if (typeof SN.C.PtagACData === 'undefined') {
1571                     $.getJSON(_peopletagAC + '?token=' + $('#token').val(), function(data) {
1572                         SN.C.PtagACData = data;
1573                         _loadTagInput(SN.Init.PeopletagAutocomplete);
1574                     });
1575                 } else { _loadTagInput(SN.Init.PeopletagAutocomplete); }
1576
1577                 $(this).parents('ul').eq(0).fadeOut(200, function() {form.fadeIn(200).find('input#tags')});
1578             })
1579
1580             $('.user_profile_tags form .submit').live('click', function() {
1581                 SN.U.FormPeopletagsXHR($(this).parents('form')); return false;
1582             });
1583         },
1584
1585         /**
1586          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1587          */
1588         AjaxForms: function() {
1589             $('form.ajax').live('submit', function() {
1590                 SN.U.FormXHR($(this));
1591                 return false;
1592             });
1593         },
1594
1595         /**
1596          * Add logic to any file upload forms to handle file size limits,
1597          * on browsers that support basic FileAPI.
1598          */
1599         UploadForms: function () {
1600             $('input[type=file]').change(function(event) {
1601                 if (typeof this.files == "object" && this.files.length > 0) {
1602                     var size = 0;
1603                     for (var i = 0; i < this.files.length; i++) {
1604                         size += this.files[i].size;
1605                     }
1606
1607                     var max = SN.U.maxFileSize($(this.form));
1608                     if (max > 0 && size > max) {
1609                         var msg = 'File too large: maximum upload size is %d bytes.';
1610                         alert(msg.replace('%d', max));
1611
1612                         // Clear the files.
1613                         $(this).val('');
1614                         event.preventDefault();
1615                         return false;
1616                     }
1617                 }
1618             });
1619         }
1620     }
1621 };
1622
1623 /**
1624  * Run initialization functions on DOM-ready.
1625  *
1626  * Note that if we're waiting on other scripts to load, this won't happen
1627  * until that's done. To load scripts asynchronously without delaying setup,
1628  * don't start them loading until after DOM-ready time!
1629  */
1630 $(document).ready(function(){
1631     SN.Init.AjaxForms();
1632     SN.Init.UploadForms();
1633     if ($('.'+SN.C.S.FormNotice).length > 0) {
1634         SN.Init.NoticeForm();
1635     }
1636     if ($('#content .notices').length > 0) {
1637         SN.Init.Notices();
1638     }
1639     if ($('#content .entity_actions').length > 0) {
1640         SN.Init.EntityActions();
1641     }
1642     if ($('#form_login').length > 0) {
1643         SN.Init.Login();
1644     }
1645     if ($('#profile_search_results').length > 0) {
1646         SN.Init.ProfileSearch();
1647     }
1648     if ($('.user_profile_tags .editable').length > 0) {
1649         SN.Init.PeopleTags();
1650     }
1651 });