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         normalizeGeoData: function(form) {
 480             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 481             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 482             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 483             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 484             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked'); // @fixme
 485
 486             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 487
 488             if (cookieValue !== null && cookieValue != 'disabled') {
 489                 cookieValue = JSON.parse(cookieValue);
 490                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 491                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 492                 if (cookieValue.NLNS) {
 493                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 494                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 495                 } else {
 496                     form.find('[name=location_ns]').val('');
 497                     form.find('[name=location_id]').val('');
 498                 }
 499             }
 500             if (cookieValue == 'disabled') {
 501                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', false).attr('checked');
 502             }
 503             else {
 504                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', true).attr('checked');
 505             }
 506
 507         },
 508         /**
 509          * Fetch an XML DOM from an XHR's response data.
 510          *
 511          * Works around unavailable responseXML when document.domain
 512          * has been modified by Meteor or other tools, in some but not
 513          * all browsers.
 514          *
 515          * @param {XMLHTTPRequest} xhr
 516          * @return DOMDocument
 517          */
 518         GetResponseXML: function(xhr) {
 519             try {
 520                 return xhr.responseXML;
 521             } catch (e) {
 522                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 523             }
 524         },
 525
 526         /**
 527          * Setup function -- DOES NOT trigger actions immediately.
 528          *
 529          * Sets up event handlers on all visible notice's reply buttons to
 530          * tweak the new-notice form with needed variables and focus it
 531          * when pushed.
 532          *
 533          * (This replaces the default reply button behavior to submit
 534          * directly to a form which comes back with a specialized page
 535          * with the form data prefilled.)
 536          *
 537          * @access private
 538          */
 539         NoticeReply: function() {
 540             $('#content .notice_reply').live('click', function(e) {
 541                 e.preventDefault();
 542                 var notice = $(this).closest('li.notice');
 543                 var nickname = ($('.author .nickname', notice).length > 0) ? $($('.author .nickname', notice)[0]) : $('.author .nickname.uid');
 544                 SN.U.NoticeInlineReplyTrigger(notice, '@' + nickname.text());
 545                 return false;
 546             });
 547         },
 548
 549         /**
 550          * Stub -- kept for compat with plugins for now.
 551          * @access private
 552          */
 553         NoticeReplyTo: function(notice) {
 554         },
 555
 556         /**
 557          * Open up a notice's inline reply box.
 558          *
 559          * @param {jQuery} notice: jQuery object containing one notice
 560          * @param {String} initialText
 561          */
 562         NoticeInlineReplyTrigger: function(notice, initialText) {
 563             // Find the notice we're replying to...
 564             var id = $($('.notice_id', notice)[0]).text();
 565             var parentNotice = notice;
 566
 567             // Find the threaded replies view we'll be adding to...
 568             var list = notice.closest('.notices');
 569             if (list.hasClass('threaded-replies')) {
 570                 // We're replying to a reply; use reply form on the end of this list.
 571                 // We'll add our form at the end of this; grab the root notice.
 572                 parentNotice = list.closest('.notice');
 573             } else {
 574                 // We're replying to a parent notice; pull its threaded list
 575                 // and we'll add on the end of it. Will add if needed.
 576                 list = $('ul.threaded-replies', notice);
 577                 if (list.length == 0) {
 578                     list = $('<ul class="notices threaded-replies xoxo"></ul>');
 579                     notice.append(list);
 580                 }
 581             }
 582
 583             // See if the form's already open...
 584             var replyForm = $('.notice-reply-form', list);
 585
 586             var nextStep = function() {
 587                 // Override...?
 588                 replyForm.find('input[name=inreplyto]').val(id);
 589
 590                 // Set focus...
 591                 var text = replyForm.find('textarea');
 592                 if (text.length == 0) {
 593                     throw "No textarea";
 594                 }
 595                 var replyto = '';
 596                 if (initialText) {
 597                     replyto = initialText + ' ';
 598                 }
 599                 text.val(replyto + text.val().replace(RegExp(replyto, 'i'), ''));
 600                 text.data('initialText', $.trim(initialText + ''));
 601                 text.focus();
 602                 if (text[0].setSelectionRange) {
 603                     var len = text.val().length;
 604                     text[0].setSelectionRange(len,len);
 605                 }
 606             };
 607             if (replyForm.length > 0) {
 608                 // Update the existing form...
 609                 nextStep();
 610             } else {
 611                 // Hide the placeholder...
 612                 var placeholder = list.find('li.notice-reply-placeholder').hide();
 613
 614                 // Create the reply form entry at the end
 615                 var replyItem = $('li.notice-reply', list);
 616                 if (replyItem.length == 0) {
 617                     replyItem = $('<li class="notice-reply"></li>');
 618
 619                     var intermediateStep = function(formMaster) {
 620                         var formEl = document._importNode(formMaster, true);
 621                         replyItem.append(formEl);
 622                         list.append(replyItem); // *after* the placeholder
 623
 624                         var form = replyForm = $(formEl);
 625                         SN.Init.NoticeFormSetup(form);
 626
 627                         nextStep();
 628                     };
 629                     if (SN.C.I.NoticeFormMaster) {
 630                         // We've already saved a master copy of the form.
 631                         // Clone it in!
 632                         intermediateStep(SN.C.I.NoticeFormMaster);
 633                     } else {
 634                         // Fetch a fresh copy of the notice form over AJAX.
 635                         // Warning: this can have a delay, which looks bad.
 636                         // @fixme this fallback may or may not work
 637                         var url = $('#form_notice').attr('action');
 638                         $.get(url, {ajax: 1}, function(data, textStatus, xhr) {
 639                             intermediateStep($('form', data)[0]);
 640                         });
 641                     }
 642                 }
 643             }
 644         },
 645
 646         NoticeInlineReplyPlaceholder: function(notice) {
 647             var list = notice.find('ul.threaded-replies');
 648             var placeholder = $('<li class="notice-reply-placeholder">' +
 649                                     '<input class="placeholder">' +
 650                                 '</li>');
 651             placeholder.find('input')
 652                 .val(SN.msg('reply_placeholder'));
 653             list.append(placeholder);
 654         },
 655
 656         /**
 657          * Setup function -- DOES NOT apply immediately.
 658          *
 659          * Sets up event handlers for inline reply mini-form placeholders.
 660          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 661          */
 662         NoticeInlineReplySetup: function() {
 663             $('li.notice-reply-placeholder input')
 664                 .live('focus', function() {
 665                     var notice = $(this).closest('li.notice');
 666                     SN.U.NoticeInlineReplyTrigger(notice);
 667                     return false;
 668                 });
 669             $('li.notice-reply-comments a')
 670                 .live('click', function() {
 671                     var url = $(this).attr('href');
 672                     var area = $(this).closest('.threaded-replies');
 673                     $.get(url, {ajax: 1}, function(data, textStatus, xhr) {
 674                         var replies = $('.threaded-replies', data);
 675                         if (replies.length) {
 676                             area.replaceWith(document._importNode(replies[0], true));
 677                         }
 678                     });
 679                     return false;
 680                 });
 681         },
 682
 683         /**
 684          * Setup function -- DOES NOT trigger actions immediately.
 685          *
 686          * Sets up event handlers for repeat forms to toss up a confirmation
 687          * popout before submitting.
 688          *
 689          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 690          */
 691         NoticeRepeat: function() {
 692             $('.form_repeat').live('click', function(e) {
 693                 e.preventDefault();
 694
 695                 SN.U.NoticeRepeatConfirmation($(this));
 696                 return false;
 697             });
 698         },
 699
 700         /**
 701          * Shows a confirmation dialog box variant of the repeat button form.
 702          * This seems to use a technique where the repeat form contains
 703          * _both_ a standalone button _and_ text and buttons for a dialog.
 704          * The dialog will close after its copy of the form is submitted,
 705          * or if you click its 'close' button.
 706          *
 707          * The dialog is created by duplicating the original form and changing
 708          * its style; while clever, this is hard to generalize and probably
 709          * duplicates a lot of unnecessary HTML output.
 710          *
 711          * @fixme create confirmation dialogs through a generalized interface
 712          * that can be reused instead of hardcoded text and styles.
 713          *
 714          * @param {jQuery} form
 715          */
 716         NoticeRepeatConfirmation: function(form) {
 717             var submit_i = form.find('.submit');
 718
 719             var submit = submit_i.clone();
 720             submit
 721                 .addClass('submit_dialogbox')
 722                 .removeClass('submit');
 723             form.append(submit);
 724             submit.bind('click', function() { SN.U.FormXHR(form); return false; });
 725
 726             submit_i.hide();
 727
 728             form
 729                 .addClass('dialogbox')
 730                 .append('<button class="close">&#215;</button>')
 731                 .closest('.notice-options')
 732                     .addClass('opaque');
 733
 734             form.find('button.close').click(function(){
 735                 $(this).remove();
 736
 737                 form
 738                     .removeClass('dialogbox')
 739                     .closest('.notice-options')
 740                         .removeClass('opaque');
 741
 742                 form.find('.submit_dialogbox').remove();
 743                 form.find('.submit').show();
 744
 745                 return false;
 746             });
 747         },
 748
 749         /**
 750          * Setup function -- DOES NOT trigger actions immediately.
 751          *
 752          * Goes through all notices currently displayed and sets up attachment
 753          * handling if needed.
 754          */
 755         NoticeAttachments: function() {
 756             $('.notice a.attachment').each(function() {
 757                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 758             });
 759         },
 760
 761         /**
 762          * Setup function -- DOES NOT trigger actions immediately.
 763          *
 764          * Sets up special attachment link handling if needed. Currently this
 765          * consists only of making the "more" button used for OStatus message
 766          * cropping turn into an auto-expansion button that loads the full
 767          * text from an attachment file.
 768          *
 769          * @param {jQuery} notice
 770          */
 771         NoticeWithAttachment: function(notice) {
 772             if (notice.find('.attachment').length === 0) {
 773                 return;
 774             }
 775
 776             var attachment_more = notice.find('.attachment.more');
 777             if (attachment_more.length > 0) {
 778                 $(attachment_more[0]).click(function() {
 779                     var m = $(this);
 780                     m.addClass(SN.C.S.Processing);
 781                     $.get(m.attr('href')+'/ajax', null, function(data) {
 782                         m.parent('.entry-content').html($(data).find('#attachment_view .entry-content').html());
 783                     });
 784
 785                     return false;
 786                 }).attr('title', SN.msg('showmore_tooltip'));
 787             }
 788         },
 789
 790         /**
 791          * Setup function -- DOES NOT trigger actions immediately.
 792          *
 793          * Sets up event handlers for the file-attachment widget in the
 794          * new notice form. When a file is selected, a box will be added
 795          * below the text input showing the filename and, if supported
 796          * by the browser, a thumbnail preview.
 797          *
 798          * This preview box will also allow removing the attachment
 799          * prior to posting.
 800          *
 801          * @param {jQuery} form
 802          */
 803         NoticeDataAttach: function(form) {
 804             var NDA = form.find('input[type=file]');
 805             NDA.change(function(event) {
 806                 form.find('.attach-status').remove();
 807
 808                 var filename = $(this).val();
 809                 if (!filename) {
 810                     // No file -- we've been tricked!
 811                     return false;
 812                 }
 813
 814                 var attachStatus = $('<div class="attach-status '+SN.C.S.Success+'"><code></code> <button class="close">&#215;</button></div>');
 815                 attachStatus.find('code').text(filename);
 816                 attachStatus.find('button').click(function(){
 817                     attachStatus.remove();
 818                     NDA.val('');
 819
 820                     return false;
 821                 });
 822                 form.append(attachStatus);
 823
 824                 if (typeof this.files == "object") {
 825                     // Some newer browsers will let us fetch the files for preview.
 826                     for (var i = 0; i < this.files.length; i++) {
 827                         SN.U.PreviewAttach(form, this.files[i]);
 828                     }
 829                 }
 830             });
 831         },
 832
 833         /**
 834          * Get PHP's MAX_FILE_SIZE setting for this form;
 835          * used to apply client-side file size limit checks.
 836          *
 837          * @param {jQuery} form
 838          * @return int max size in bytes; 0 or negative means no limit
 839          */
 840         maxFileSize: function(form) {
 841             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 842             if (max) {
 843                 return parseInt(max);
 844             } else {
 845                 return 0;
 846             }
 847         },
 848
 849         /**
 850          * For browsers with FileAPI support: make a thumbnail if possible,
 851          * and append it into the attachment display widget.
 852          *
 853          * Known good:
 854          * - Firefox 3.6.6, 4.0b7
 855          * - Chrome 8.0.552.210
 856          *
 857          * Known ok metadata, can't get contents:
 858          * - Safari 5.0.2
 859          *
 860          * Known fail:
 861          * - Opera 10.63, 11 beta (no input.files interface)
 862          *
 863          * @param {jQuery} form
 864          * @param {File} file
 865          *
 866          * @todo use configured thumbnail size
 867          * @todo detect pixel size?
 868          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 869          */
 870         PreviewAttach: function(form, file) {
 871             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 872             var preview = true;
 873
 874             var blobAsDataURL;
 875             if (typeof window.createObjectURL != "undefined") {
 876                 /**
 877                  * createObjectURL lets us reference the file directly from an <img>
 878                  * This produces a compact URL with an opaque reference to the file,
 879                  * which we can reference immediately.
 880                  *
 881                  * - Firefox 3.6.6: no
 882                  * - Firefox 4.0b7: no
 883                  * - Safari 5.0.2: no
 884                  * - Chrome 8.0.552.210: works!
 885                  */
 886                 blobAsDataURL = function(blob, callback) {
 887                     callback(window.createObjectURL(blob));
 888                 }
 889             } else if (typeof window.FileReader != "undefined") {
 890                 /**
 891                  * FileAPI's FileReader can build a data URL from a blob's contents,
 892                  * but it must read the file and build it asynchronously. This means
 893                  * we'll be passing a giant data URL around, which may be inefficient.
 894                  *
 895                  * - Firefox 3.6.6: works!
 896                  * - Firefox 4.0b7: works!
 897                  * - Safari 5.0.2: no
 898                  * - Chrome 8.0.552.210: works!
 899                  */
 900                 blobAsDataURL = function(blob, callback) {
 901                     var reader = new FileReader();
 902                     reader.onload = function(event) {
 903                         callback(reader.result);
 904                     }
 905                     reader.readAsDataURL(blob);
 906                 }
 907             } else {
 908                 preview = false;
 909             }
 910
 911             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 912             if ($.inArray(file.type, imageTypes) == -1) {
 913                 // We probably don't know how to show the file.
 914                 preview = false;
 915             }
 916
 917             var maxSize = 8 * 1024 * 1024;
 918             if (file.size > maxSize) {
 919                 // Don't kill the browser trying to load some giant image.
 920                 preview = false;
 921             }
 922
 923             if (preview) {
 924                 blobAsDataURL(file, function(url) {
 925                     var img = $('<img>')
 926                         .attr('title', tooltip)
 927                         .attr('alt', tooltip)
 928                         .attr('src', url)
 929                         .attr('style', 'height: 120px');
 930                     form.find('.attach-status').append(img);
 931                 });
 932             } else {
 933                 var img = $('<div></div>').text(tooltip);
 934                 form.find('.attach-status').append(img);
 935             }
 936         },
 937
 938         /**
 939          * Setup function -- DOES NOT trigger actions immediately.
 940          *
 941          * Initializes state for the location-lookup features in the
 942          * new-notice form. Seems to set up some event handlers for
 943          * triggering lookups and using the new values.
 944          *
 945          * @param {jQuery} form
 946          *
 947          * @fixme tl;dr
 948          * @fixme there's not good visual state update here, so users have a
 949          *        hard time figuring out if it's working or fixing if it's wrong.
 950          *
 951          */
 952         NoticeLocationAttach: function(form) {
 953             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
 954             var NLat = form.find('[name=lat]')
 955             var NLon = form.find('[name=lon]')
 956             var NLNS = form.find('[name=location_ns]').val();
 957             var NLID = form.find('[name=location_id]').val();
 958             var NLN = ''; // @fixme
 959             var NDGe = form.find('[name=notice_data-geo]');
 960             var check = form.find('[name=notice_data-geo]');
 961             var label = form.find('label.notice_data-geo');
 962
 963             function removeNoticeDataGeo(error) {
 964                 label
 965                     .attr('title', jQuery.trim(label.text()))
 966                     .removeClass('checked');
 967
 968                 form.find('[name=lat]').val('');
 969                 form.find('[name=lon]').val('');
 970                 form.find('[name=location_ns]').val('');
 971                 form.find('[name=location_id]').val('');
 972                 form.find('[name=notice_data-geo]').attr('checked', false);
 973
 974                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
 975
 976                 if (error) {
 977                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
 978                     form.find('.geo_status_wrapper .geo_status').text(error);
 979                 } else {
 980                     form.find('.geo_status_wrapper').remove();
 981                 }
 982             }
 983
 984             function getJSONgeocodeURL(geocodeURL, data) {
 985                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
 986                 $.getJSON(geocodeURL, data, function(location) {
 987                     var lns, lid;
 988
 989                     if (typeof(location.location_ns) != 'undefined') {
 990                         form.find('[name=location_ns]').val(location.location_ns);
 991                         lns = location.location_ns;
 992                     }
 993
 994                     if (typeof(location.location_id) != 'undefined') {
 995                         form.find('[name=location_id]').val(location.location_id);
 996                         lid = location.location_id;
 997                     }
 998
 999                     if (typeof(location.name) == 'undefined') {
1000                         NLN_text = data.lat + ';' + data.lon;
1001                     }
1002                     else {
1003                         NLN_text = location.name;
1004                     }
1005
1006                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1007                     label
1008                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1009
1010                     form.find('[name=lat]').val(data.lat);
1011                     form.find('[name=lon]').val(data.lon);
1012                     form.find('[name=location_ns]').val(lns);
1013                     form.find('[name=location_id]').val(lid);
1014                     form.find('[name=notice_data-geo]').attr('checked', true);
1015
1016                     var cookieValue = {
1017                         NLat: data.lat,
1018                         NLon: data.lon,
1019                         NLNS: lns,
1020                         NLID: lid,
1021                         NLN: NLN_text,
1022                         NLNU: location.url,
1023                         NDG: true
1024                     };
1025
1026                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1027                 });
1028             }
1029
1030             if (check.length > 0) {
1031                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1032                     check.attr('checked', false);
1033                 }
1034                 else {
1035                     check.attr('checked', true);
1036                 }
1037
1038                 var NGW = form.find('.notice_data-geo_wrap');
1039                 var geocodeURL = NGW.attr('data-api');
1040
1041                 label
1042                     .attr('title', label.text());
1043
1044                 check.change(function() {
1045                     if (check.attr('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1046                         label
1047                             .attr('title', NoticeDataGeo_text.ShareDisable)
1048                             .addClass('checked');
1049
1050                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1051                             if (navigator.geolocation) {
1052                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1053                                 navigator.geolocation.getCurrentPosition(
1054                                     function(position) {
1055                                         form.find('[name=lat]').val(position.coords.latitude);
1056                                         form.find('[name=lon]').val(position.coords.longitude);
1057
1058                                         var data = {
1059                                             lat: position.coords.latitude,
1060                                             lon: position.coords.longitude,
1061                                             token: $('#token').val()
1062                                         };
1063
1064                                         getJSONgeocodeURL(geocodeURL, data);
1065                                     },
1066
1067                                     function(error) {
1068                                         switch(error.code) {
1069                                             case error.PERMISSION_DENIED:
1070                                                 removeNoticeDataGeo('Location permission denied.');
1071                                                 break;
1072                                             case error.TIMEOUT:
1073                                                 //$('#'+SN.C.S.NoticeDataGeo).attr('checked', false);
1074                                                 removeNoticeDataGeo('Location lookup timeout.');
1075                                                 break;
1076                                         }
1077                                     },
1078
1079                                     {
1080                                         timeout: 10000
1081                                     }
1082                                 );
1083                             }
1084                             else {
1085                                 if (NLat.length > 0 && NLon.length > 0) {
1086                                     var data = {
1087                                         lat: NLat,
1088                                         lon: NLon,
1089                                         token: $('#token').val()
1090                                     };
1091
1092                                     getJSONgeocodeURL(geocodeURL, data);
1093                                 }
1094                                 else {
1095                                     removeNoticeDataGeo();
1096                                     check.remove();
1097                                     label.remove();
1098                                 }
1099                             }
1100                         }
1101                         else {
1102                             var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1103
1104                             form.find('[name=lat]').val(cookieValue.NLat);
1105                             form.find('[name=lon]').val(cookieValue.NLon);
1106                             form.find('[name=location_ns]').val(cookieValue.NLNS);
1107                             form.find('[name=location_id]').val(cookieValue.NLID);
1108                             form.find('[name=notice_data-geo]').attr('checked', cookieValue.NDG);
1109
1110                             SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1111                             label
1112                                 .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1113                                 .addClass('checked');
1114                         }
1115                     }
1116                     else {
1117                         removeNoticeDataGeo();
1118                     }
1119                 }).change();
1120             }
1121         },
1122
1123         /**
1124          * Create or update a geolocation status widget in this notice posting form.
1125          *
1126          * @param {jQuery} form
1127          * @param {String} status
1128          * @param {String} lat (optional)
1129          * @param {String} lon (optional)
1130          * @param {String} url (optional)
1131          */
1132         NoticeGeoStatus: function(form, status, lat, lon, url)
1133         {
1134             var wrapper = form.find('.geo_status_wrapper');
1135             if (wrapper.length == 0) {
1136                 wrapper = $('<div class="'+SN.C.S.Success+' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1137                 wrapper.find('button.close').click(function() {
1138                     form.find('[name=notice_data-geo]').removeAttr('checked').change();
1139                     return false;
1140                 });
1141                 form.append(wrapper);
1142             }
1143             var label;
1144             if (url) {
1145                 label = $('<a></a>').attr('href', url);
1146             } else {
1147                 label = $('<span></span>');
1148             }
1149             label.text(status);
1150             if (lat || lon) {
1151                 var latlon = lat + ';' + lon;
1152                 label.attr('title', latlon);
1153                 if (!status) {
1154                     label.text(latlon)
1155                 }
1156             }
1157             wrapper.find('.geo_status').empty().append(label);
1158         },
1159
1160         /**
1161          * Setup function -- DOES NOT trigger actions immediately.
1162          *
1163          * Initializes event handlers for the "Send direct message" link on
1164          * profile pages, setting it up to display a dialog box when clicked.
1165          *
1166          * Unlike the repeat confirmation form, this appears to fetch
1167          * the form _from the original link target_, so the form itself
1168          * doesn't need to be in the current document.
1169          *
1170          * @fixme breaks ability to open link in new window?
1171          */
1172         NewDirectMessage: function() {
1173             NDM = $('.entity_send-a-message a');
1174             NDM.attr({'href':NDM.attr('href')+'&ajax=1'});
1175             NDM.bind('click', function() {
1176                 var NDMF = $('.entity_send-a-message form');
1177                 if (NDMF.length === 0) {
1178                     $(this).addClass(SN.C.S.Processing);
1179                     $.get(NDM.attr('href'), null, function(data) {
1180                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1181                         NDMF = $('.entity_send-a-message .form_notice');
1182                         SN.U.FormNoticeXHR(NDMF);
1183                         SN.U.FormNoticeEnhancements(NDMF);
1184                         NDMF.append('<button class="close">&#215;</button>');
1185                         $('.entity_send-a-message button').click(function(){
1186                             NDMF.hide();
1187                             return false;
1188                         });
1189                         NDM.removeClass(SN.C.S.Processing);
1190                     });
1191                 }
1192                 else {
1193                     NDMF.show();
1194                     $('.entity_send-a-message textarea').focus();
1195                 }
1196                 return false;
1197             });
1198         },
1199
1200         /**
1201          * Return a date object with the current local time on the
1202          * given year, month, and day.
1203          *
1204          * @param {number} year: 4-digit year
1205          * @param {number} month: 0 == January
1206          * @param {number} day: 1 == 1
1207          * @return {Date}
1208          */
1209         GetFullYear: function(year, month, day) {
1210             var date = new Date();
1211             date.setFullYear(year, month, day);
1212
1213             return date;
1214         },
1215
1216         /**
1217          * Some sort of object interface for storing some structured
1218          * information in a cookie.
1219          *
1220          * Appears to be used to save the last-used login nickname?
1221          * That's something that browsers usually take care of for us
1222          * these days, do we really need to do it? Does anything else
1223          * use this interface?
1224          *
1225          * @fixme what is this?
1226          * @fixme should this use non-cookie local storage when available?
1227          */
1228         StatusNetInstance: {
1229             /**
1230              * @fixme what is this?
1231              */
1232             Set: function(value) {
1233                 var SNI = SN.U.StatusNetInstance.Get();
1234                 if (SNI !== null) {
1235                     value = $.extend(SNI, value);
1236                 }
1237
1238                 $.cookie(
1239                     SN.C.S.StatusNetInstance,
1240                     JSON.stringify(value),
1241                     {
1242                         path: '/',
1243                         expires: SN.U.GetFullYear(2029, 0, 1)
1244                     });
1245             },
1246
1247             /**
1248              * @fixme what is this?
1249              */
1250             Get: function() {
1251                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1252                 if (cookieValue !== null) {
1253                     return JSON.parse(cookieValue);
1254                 }
1255                 return null;
1256             },
1257
1258             /**
1259              * @fixme what is this?
1260              */
1261             Delete: function() {
1262                 $.cookie(SN.C.S.StatusNetInstance, null);
1263             }
1264         },
1265
1266         /**
1267          * Check if the current page is a timeline where the current user's
1268          * posts should be displayed immediately on success.
1269          *
1270          * @fixme this should be done in a saner way, with machine-readable
1271          * info about what page we're looking at.
1272          *
1273          * @param {DOMElement} notice: HTML chunk with formatted notice
1274          * @return boolean
1275          */
1276         belongsOnTimeline: function(notice) {
1277             var action = $("body").attr('id');
1278             if (action == 'public') {
1279                 return true;
1280             }
1281
1282             var profileLink = $('#nav_profile a').attr('href');
1283             if (profileLink) {
1284                 var authorUrl = $(notice).find('.vcard.author a.url').attr('href');
1285                 if (authorUrl == profileLink) {
1286                     if (action == 'all' || action == 'showstream') {
1287                         // Posts always show on your own friends and profile streams.
1288                         return true;
1289                     }
1290                 }
1291             }
1292
1293             // @fixme tag, group, reply timelines should be feasible as well.
1294             // Mismatch between id-based and name-based user/group links currently complicates
1295             // the lookup, since all our inline mentions contain the absolute links but the
1296             // UI links currently on the page use malleable names.
1297
1298             return false;
1299         },
1300
1301         /**
1302          * Switch to another active input sub-form.
1303          * This will hide the current form (if any), show the new one, and
1304          * update the input type tab selection state.
1305          *
1306          * @param {String} tag
1307          */
1308         switchInputFormTab: function(tag) {
1309             // The one that's current isn't current anymore
1310             $('.input_form_nav_tab.current').removeClass('current');
1311             if (tag == 'placeholder') {
1312                 // Hack: when showing the placeholder, mark the tab
1313                 // as current for 'Status'.
1314                 $('#input_form_nav_status').addClass('current');
1315             } else {
1316                 $('#input_form_nav_'+tag).addClass('current');
1317             }
1318
1319             $('.input_form.current').removeClass('current');
1320             $('#input_form_'+tag)
1321                 .addClass('current')
1322                 .find('.ajax-notice').each(function() {
1323                     var form = $(this);
1324                     SN.Init.NoticeFormSetup(form);
1325                 })
1326                 .find('textarea:first').focus();
1327         }
1328     },
1329
1330     Init: {
1331         /**
1332          * If user is logged in, run setup code for the new notice form:
1333          *
1334          *  - char counter
1335          *  - AJAX submission
1336          *  - location events
1337          *  - file upload events
1338          */
1339         NoticeForm: function() {
1340             if ($('body.user_in').length > 0) {
1341                 // SN.Init.NoticeFormSetup() will get run
1342                 // when forms get displayed for the first time...
1343
1344                 // Hack to initialize the placeholder at top
1345                 $('#input_form_placeholder input.placeholder').focus(function() {
1346                     SN.U.switchInputFormTab("status");
1347                 });
1348
1349                 // Make inline reply forms self-close when clicking out.
1350                 $('body').bind('click', function(e) {
1351                     var currentForm = $('#content .input_forms div.current');
1352                     if (currentForm.length > 0) {
1353                         if ($('#content .input_forms').has(e.target).length == 0) {
1354                             // If all fields are empty, switch back to the placeholder.
1355                             var fields = currentForm.find('textarea, input[type=text], input[type=""]');
1356                             var anything = false;
1357                             fields.each(function() {
1358                                 anything = anything || $(this).val();
1359                             });
1360                             if (!anything) {
1361                                 SN.U.switchInputFormTab("placeholder");
1362                             }
1363                         }
1364                     }
1365
1366                     var openReplies = $('li.notice-reply');
1367                     if (openReplies.length > 0) {
1368                         var target = $(e.target);
1369                         openReplies.each(function() {
1370                             // Did we click outside this one?
1371                             var replyItem = $(this);
1372                             if (replyItem.has(e.target).length == 0) {
1373                                 var textarea = replyItem.find('.notice_data-text:first');
1374                                 var cur = $.trim(textarea.val());
1375                                 // Only close if there's been no edit.
1376                                 if (cur == '' || cur == textarea.data('initialText')) {
1377                                     var parentNotice = replyItem.closest('li.notice');
1378                                     replyItem.remove();
1379                                     parentNotice.find('li.notice-reply-placeholder').show();
1380                                 }
1381                             }
1382                         });
1383                     }
1384                 });
1385             }
1386         },
1387
1388         /**
1389          * Encapsulate notice form setup for a single form.
1390          * Plugins can add extra setup by monkeypatching this
1391          * function.
1392          *
1393          * @param {jQuery} form
1394          */
1395         NoticeFormSetup: function(form) {
1396             if (!form.data('NoticeFormSetup')) {
1397                 SN.U.NoticeLocationAttach(form);
1398                 SN.U.FormNoticeXHR(form);
1399                 SN.U.FormNoticeEnhancements(form);
1400                 SN.U.NoticeDataAttach(form);
1401                 form.data('NoticeFormSetup', true);
1402             }
1403         },
1404
1405         /**
1406          * Run setup code for notice timeline views items:
1407          *
1408          * - AJAX submission for fave/repeat/reply (if logged in)
1409          * - Attachment link extras ('more' links)
1410          */
1411         Notices: function() {
1412             if ($('body.user_in').length > 0) {
1413                 var masterForm = $('.form_notice:first');
1414                 if (masterForm.length > 0) {
1415                     SN.C.I.NoticeFormMaster = document._importNode(masterForm[0], true);
1416                 }
1417                 SN.U.NoticeRepeat();
1418                 SN.U.NoticeReply();
1419                 SN.U.NoticeInlineReplySetup();
1420             }
1421
1422             SN.U.NoticeAttachments();
1423         },
1424
1425         /**
1426          * Run setup code for user & group profile page header area if logged in:
1427          *
1428          * - AJAX submission for sub/unsub/join/leave/nudge
1429          * - AJAX form popup for direct-message
1430          */
1431         EntityActions: function() {
1432             if ($('body.user_in').length > 0) {
1433                 SN.U.NewDirectMessage();
1434             }
1435         },
1436
1437         /**
1438          * Run setup code for login form:
1439          *
1440          * - loads saved last-used-nickname from cookie
1441          * - sets event handler to save nickname to cookie on submit
1442          *
1443          * @fixme is this necessary? Browsers do their own form saving these days.
1444          */
1445         Login: function() {
1446             if (SN.U.StatusNetInstance.Get() !== null) {
1447                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1448                 if (nickname !== null) {
1449                     $('#form_login #nickname').val(nickname);
1450                 }
1451             }
1452
1453             $('#form_login').bind('submit', function() {
1454                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1455                 return true;
1456             });
1457         },
1458
1459         /**
1460          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1461          */
1462         AjaxForms: function() {
1463             $('form.ajax').live('submit', function() {
1464                 SN.U.FormXHR($(this));
1465                 return false;
1466             });
1467         },
1468
1469         /**
1470          * Add logic to any file upload forms to handle file size limits,
1471          * on browsers that support basic FileAPI.
1472          */
1473         UploadForms: function () {
1474             $('input[type=file]').change(function(event) {
1475                 if (typeof this.files == "object" && this.files.length > 0) {
1476                     var size = 0;
1477                     for (var i = 0; i < this.files.length; i++) {
1478                         size += this.files[i].size;
1479                     }
1480
1481                     var max = SN.U.maxFileSize($(this.form));
1482                     if (max > 0 && size > max) {
1483                         var msg = 'File too large: maximum upload size is %d bytes.';
1484                         alert(msg.replace('%d', max));
1485
1486                         // Clear the files.
1487                         $(this).val('');
1488                         event.preventDefault();
1489                         return false;
1490                     }
1491                 }
1492             });
1493         }
1494     }
1495 };
1496
1497 /**
1498  * Run initialization functions on DOM-ready.
1499  *
1500  * Note that if we're waiting on other scripts to load, this won't happen
1501  * until that's done. To load scripts asynchronously without delaying setup,
1502  * don't start them loading until after DOM-ready time!
1503  */
1504 $(document).ready(function(){
1505     SN.Init.AjaxForms();
1506     SN.Init.UploadForms();
1507     if ($('.'+SN.C.S.FormNotice).length > 0) {
1508         SN.Init.NoticeForm();
1509     }
1510     if ($('#content .notices').length > 0) {
1511         SN.Init.Notices();
1512     }
1513     if ($('#content .entity_actions').length > 0) {
1514         SN.Init.EntityActions();
1515     }
1516     if ($('#form_login').length > 0) {
1517         SN.Init.Login();
1518     }
1519 });