js/util.js

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