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, insert it in place.
 416                                 var id = $(notice).attr('id');
 417                                 if ($("#"+id).length == 0) {
 418                                     var parentNotice = replyItem.closest('li.notice');
 419                                     replyItem.replaceWith(notice);
 420                                     SN.U.NoticeInlineReplyPlaceholder(parentNotice);
 421                                 } else {
 422                                     // Realtime came through before us...
 423                                     replyItem.remove();
 424                                 }
 425                             } else if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
 426                                 // Not a reply. If on our timeline, show it at the top!
 427
 428                                 if ($('#'+notice.id).length === 0) {
 429                                     var notice_irt_value = form.find('[name=inreplyto]').val();
 430                                     var notice_irt = '#notices_primary #notice-'+notice_irt_value;
 431                                     if($('body')[0].id == 'conversation') {
 432                                         if(notice_irt_value.length > 0 && $(notice_irt+' .notices').length < 1) {
 433                                             $(notice_irt).append('<ul class="notices"></ul>');
 434                                         }
 435                                         $($(notice_irt+' .notices')[0]).append(notice);
 436                                     }
 437                                     else {
 438                                         notices.prepend(notice);
 439                                     }
 440                                     $('#'+notice.id)
 441                                         .css({display:'none'})
 442                                         .fadeIn(2500);
 443                                     SN.U.NoticeWithAttachment($('#'+notice.id));
 444                                     SN.U.switchInputFormTab("placeholder");
 445                                 }
 446                             } else {
 447                                 // Not on a timeline that this belongs on?
 448                                 // Just show a success message.
 449                                 // @fixme inline
 450                                 showFeedback('success', $('title', data).text());
 451                             }
 452                         }
 453                         form.resetForm();
 454                         form.find('[name=inreplyto]').val('');
 455                         form.find('.attach-status').remove();
 456                         SN.U.FormNoticeEnhancements(form);
 457                     }
 458                 },
 459                 complete: function(xhr, textStatus) {
 460                     form
 461                         .removeClass(SN.C.S.Processing)
 462                         .find('.submit')
 463                             .removeAttr(SN.C.S.Disabled)
 464                             .removeClass(SN.C.S.Disabled);
 465
 466                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 467                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 468                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 469                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 470                     form.find('[name=notice_data-geo]').attr('checked', SN.C.I.NoticeDataGeo.NDG);
 471                 }
 472             });
 473         },
 474
 475         normalizeGeoData: function(form) {
 476             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 477             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 478             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 479             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 480             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked'); // @fixme
 481
 482             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 483
 484             if (cookieValue !== null && cookieValue != 'disabled') {
 485                 cookieValue = JSON.parse(cookieValue);
 486                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 487                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 488                 if (cookieValue.NLNS) {
 489                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 490                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 491                 } else {
 492                     form.find('[name=location_ns]').val('');
 493                     form.find('[name=location_id]').val('');
 494                 }
 495             }
 496             if (cookieValue == 'disabled') {
 497                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', false).attr('checked');
 498             }
 499             else {
 500                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', true).attr('checked');
 501             }
 502
 503         },
 504         /**
 505          * Fetch an XML DOM from an XHR's response data.
 506          *
 507          * Works around unavailable responseXML when document.domain
 508          * has been modified by Meteor or other tools, in some but not
 509          * all browsers.
 510          *
 511          * @param {XMLHTTPRequest} xhr
 512          * @return DOMDocument
 513          */
 514         GetResponseXML: function(xhr) {
 515             try {
 516                 return xhr.responseXML;
 517             } catch (e) {
 518                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 519             }
 520         },
 521
 522         /**
 523          * Setup function -- DOES NOT trigger actions immediately.
 524          *
 525          * Sets up event handlers on all visible notice's reply buttons to
 526          * tweak the new-notice form with needed variables and focus it
 527          * when pushed.
 528          *
 529          * (This replaces the default reply button behavior to submit
 530          * directly to a form which comes back with a specialized page
 531          * with the form data prefilled.)
 532          *
 533          * @access private
 534          */
 535         NoticeReply: function() {
 536             $('#content .notice_reply').live('click', function(e) {
 537                 e.preventDefault();
 538                 var notice = $(this).closest('li.notice');
 539                 var nickname = ($('.author .nickname', notice).length > 0) ? $($('.author .nickname', notice)[0]) : $('.author .nickname.uid');
 540                 SN.U.NoticeInlineReplyTrigger(notice, '@' + nickname.text());
 541                 return false;
 542             });
 543         },
 544
 545         /**
 546          * Stub -- kept for compat with plugins for now.
 547          * @access private
 548          */
 549         NoticeReplyTo: function(notice) {
 550         },
 551
 552         /**
 553          * Open up a notice's inline reply box.
 554          *
 555          * @param {jQuery} notice: jQuery object containing one notice
 556          * @param {String} initialText
 557          */
 558         NoticeInlineReplyTrigger: function(notice, initialText) {
 559             // Find the notice we're replying to...
 560             var id = $($('.notice_id', notice)[0]).text();
 561             var parentNotice = notice;
 562
 563             // Find the threaded replies view we'll be adding to...
 564             var list = notice.closest('.notices');
 565             if (list.hasClass('threaded-replies')) {
 566                 // We're replying to a reply; use reply form on the end of this list.
 567                 // We'll add our form at the end of this; grab the root notice.
 568                 parentNotice = list.closest('.notice');
 569             } else {
 570                 // We're replying to a parent notice; pull its threaded list
 571                 // and we'll add on the end of it. Will add if needed.
 572                 list = $('ul.threaded-replies', notice);
 573                 if (list.length == 0) {
 574                     list = $('<ul class="notices threaded-replies xoxo"></ul>');
 575                     notice.append(list);
 576                 }
 577             }
 578
 579             // See if the form's already open...
 580             var replyForm = $('.notice-reply-form', list);
 581
 582             var nextStep = function() {
 583                 // Override...?
 584                 replyForm.find('input[name=inreplyto]').val(id);
 585
 586                 // Set focus...
 587                 var text = replyForm.find('textarea');
 588                 if (text.length == 0) {
 589                     throw "No textarea";
 590                 }
 591                 var replyto = '';
 592                 if (initialText) {
 593                     replyto = initialText + ' ';
 594                 }
 595                 text.val(replyto + text.val().replace(RegExp(replyto, 'i'), ''));
 596                 text.data('initialText', $.trim(initialText + ''));
 597                 text.focus();
 598                 if (text[0].setSelectionRange) {
 599                     var len = text.val().length;
 600                     text[0].setSelectionRange(len,len);
 601                 }
 602             };
 603             if (replyForm.length > 0) {
 604                 // Update the existing form...
 605                 nextStep();
 606             } else {
 607                 // Remove placeholder if any
 608                 list.find('li.notice-reply-placeholder').remove();
 609
 610                 // Create the reply form entry at the end
 611                 var replyItem = $('li.notice-reply', list);
 612                 if (replyItem.length == 0) {
 613                     replyItem = $('<li class="notice-reply"></li>');
 614
 615                     var intermediateStep = function(formMaster) {
 616                         var formEl = document._importNode(formMaster, true);
 617                         replyItem.append(formEl);
 618                         list.append(replyItem);
 619
 620                         var form = replyForm = $(formEl);
 621                         SN.Init.NoticeFormSetup(form);
 622
 623                         nextStep();
 624                     };
 625                     if (SN.C.I.NoticeFormMaster) {
 626                         // We've already saved a master copy of the form.
 627                         // Clone it in!
 628                         intermediateStep(SN.C.I.NoticeFormMaster);
 629                     } else {
 630                         // Fetch a fresh copy of the notice form over AJAX.
 631                         // Warning: this can have a delay, which looks bad.
 632                         // @fixme this fallback may or may not work
 633                         var url = $('#form_notice').attr('action');
 634                         $.get(url, {ajax: 1}, function(data, textStatus, xhr) {
 635                             intermediateStep($('form', data)[0]);
 636                         });
 637                     }
 638                 }
 639             }
 640         },
 641
 642         NoticeInlineReplyPlaceholder: function(notice) {
 643             var list = notice.find('ul.threaded-replies');
 644             var placeholder = $('<li class="notice-reply-placeholder">' +
 645                                     '<input class="placeholder">' +
 646                                 '</li>');
 647             placeholder.find('input')
 648                 .val(SN.msg('reply_placeholder'));
 649             list.append(placeholder);
 650         },
 651
 652         /**
 653          * Setup function -- DOES NOT apply immediately.
 654          *
 655          * Sets up event handlers for inline reply mini-form placeholders.
 656          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 657          */
 658         NoticeInlineReplySetup: function() {
 659             $('li.notice-reply-placeholder input')
 660                 .live('focus', function() {
 661                     var notice = $(this).closest('li.notice');
 662                     SN.U.NoticeInlineReplyTrigger(notice);
 663                     return false;
 664                 });
 665         },
 666
 667         /**
 668          * Setup function -- DOES NOT trigger actions immediately.
 669          *
 670          * Sets up event handlers for repeat forms to toss up a confirmation
 671          * popout before submitting.
 672          *
 673          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 674          */
 675         NoticeRepeat: function() {
 676             $('.form_repeat').live('click', function(e) {
 677                 e.preventDefault();
 678
 679                 SN.U.NoticeRepeatConfirmation($(this));
 680                 return false;
 681             });
 682         },
 683
 684         /**
 685          * Shows a confirmation dialog box variant of the repeat button form.
 686          * This seems to use a technique where the repeat form contains
 687          * _both_ a standalone button _and_ text and buttons for a dialog.
 688          * The dialog will close after its copy of the form is submitted,
 689          * or if you click its 'close' button.
 690          *
 691          * The dialog is created by duplicating the original form and changing
 692          * its style; while clever, this is hard to generalize and probably
 693          * duplicates a lot of unnecessary HTML output.
 694          *
 695          * @fixme create confirmation dialogs through a generalized interface
 696          * that can be reused instead of hardcoded text and styles.
 697          *
 698          * @param {jQuery} form
 699          */
 700         NoticeRepeatConfirmation: function(form) {
 701             var submit_i = form.find('.submit');
 702
 703             var submit = submit_i.clone();
 704             submit
 705                 .addClass('submit_dialogbox')
 706                 .removeClass('submit');
 707             form.append(submit);
 708             submit.bind('click', function() { SN.U.FormXHR(form); return false; });
 709
 710             submit_i.hide();
 711
 712             form
 713                 .addClass('dialogbox')
 714                 .append('<button class="close">&#215;</button>')
 715                 .closest('.notice-options')
 716                     .addClass('opaque');
 717
 718             form.find('button.close').click(function(){
 719                 $(this).remove();
 720
 721                 form
 722                     .removeClass('dialogbox')
 723                     .closest('.notice-options')
 724                         .removeClass('opaque');
 725
 726                 form.find('.submit_dialogbox').remove();
 727                 form.find('.submit').show();
 728
 729                 return false;
 730             });
 731         },
 732
 733         /**
 734          * Setup function -- DOES NOT trigger actions immediately.
 735          *
 736          * Goes through all notices currently displayed and sets up attachment
 737          * handling if needed.
 738          */
 739         NoticeAttachments: function() {
 740             $('.notice a.attachment').each(function() {
 741                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 742             });
 743         },
 744
 745         /**
 746          * Setup function -- DOES NOT trigger actions immediately.
 747          *
 748          * Sets up special attachment link handling if needed. Currently this
 749          * consists only of making the "more" button used for OStatus message
 750          * cropping turn into an auto-expansion button that loads the full
 751          * text from an attachment file.
 752          *
 753          * @param {jQuery} notice
 754          */
 755         NoticeWithAttachment: function(notice) {
 756             if (notice.find('.attachment').length === 0) {
 757                 return;
 758             }
 759
 760             var attachment_more = notice.find('.attachment.more');
 761             if (attachment_more.length > 0) {
 762                 $(attachment_more[0]).click(function() {
 763                     var m = $(this);
 764                     m.addClass(SN.C.S.Processing);
 765                     $.get(m.attr('href')+'/ajax', null, function(data) {
 766                         m.parent('.entry-content').html($(data).find('#attachment_view .entry-content').html());
 767                     });
 768
 769                     return false;
 770                 }).attr('title', SN.msg('showmore_tooltip'));
 771             }
 772         },
 773
 774         /**
 775          * Setup function -- DOES NOT trigger actions immediately.
 776          *
 777          * Sets up event handlers for the file-attachment widget in the
 778          * new notice form. When a file is selected, a box will be added
 779          * below the text input showing the filename and, if supported
 780          * by the browser, a thumbnail preview.
 781          *
 782          * This preview box will also allow removing the attachment
 783          * prior to posting.
 784          *
 785          * @param {jQuery} form
 786          */
 787         NoticeDataAttach: function(form) {
 788             var NDA = form.find('input[type=file]');
 789             NDA.change(function(event) {
 790                 form.find('.attach-status').remove();
 791
 792                 var filename = $(this).val();
 793                 if (!filename) {
 794                     // No file -- we've been tricked!
 795                     return false;
 796                 }
 797
 798                 var attachStatus = $('<div class="attach-status '+SN.C.S.Success+'"><code></code> <button class="close">&#215;</button></div>');
 799                 attachStatus.find('code').text(filename);
 800                 attachStatus.find('button').click(function(){
 801                     attachStatus.remove();
 802                     NDA.val('');
 803
 804                     return false;
 805                 });
 806                 form.append(attachStatus);
 807
 808                 if (typeof this.files == "object") {
 809                     // Some newer browsers will let us fetch the files for preview.
 810                     for (var i = 0; i < this.files.length; i++) {
 811                         SN.U.PreviewAttach(form, this.files[i]);
 812                     }
 813                 }
 814             });
 815         },
 816
 817         /**
 818          * Get PHP's MAX_FILE_SIZE setting for this form;
 819          * used to apply client-side file size limit checks.
 820          *
 821          * @param {jQuery} form
 822          * @return int max size in bytes; 0 or negative means no limit
 823          */
 824         maxFileSize: function(form) {
 825             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 826             if (max) {
 827                 return parseInt(max);
 828             } else {
 829                 return 0;
 830             }
 831         },
 832
 833         /**
 834          * For browsers with FileAPI support: make a thumbnail if possible,
 835          * and append it into the attachment display widget.
 836          *
 837          * Known good:
 838          * - Firefox 3.6.6, 4.0b7
 839          * - Chrome 8.0.552.210
 840          *
 841          * Known ok metadata, can't get contents:
 842          * - Safari 5.0.2
 843          *
 844          * Known fail:
 845          * - Opera 10.63, 11 beta (no input.files interface)
 846          *
 847          * @param {jQuery} form
 848          * @param {File} file
 849          *
 850          * @todo use configured thumbnail size
 851          * @todo detect pixel size?
 852          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 853          */
 854         PreviewAttach: function(form, file) {
 855             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 856             var preview = true;
 857
 858             var blobAsDataURL;
 859             if (typeof window.createObjectURL != "undefined") {
 860                 /**
 861                  * createObjectURL lets us reference the file directly from an <img>
 862                  * This produces a compact URL with an opaque reference to the file,
 863                  * which we can reference immediately.
 864                  *
 865                  * - Firefox 3.6.6: no
 866                  * - Firefox 4.0b7: no
 867                  * - Safari 5.0.2: no
 868                  * - Chrome 8.0.552.210: works!
 869                  */
 870                 blobAsDataURL = function(blob, callback) {
 871                     callback(window.createObjectURL(blob));
 872                 }
 873             } else if (typeof window.FileReader != "undefined") {
 874                 /**
 875                  * FileAPI's FileReader can build a data URL from a blob's contents,
 876                  * but it must read the file and build it asynchronously. This means
 877                  * we'll be passing a giant data URL around, which may be inefficient.
 878                  *
 879                  * - Firefox 3.6.6: works!
 880                  * - Firefox 4.0b7: works!
 881                  * - Safari 5.0.2: no
 882                  * - Chrome 8.0.552.210: works!
 883                  */
 884                 blobAsDataURL = function(blob, callback) {
 885                     var reader = new FileReader();
 886                     reader.onload = function(event) {
 887                         callback(reader.result);
 888                     }
 889                     reader.readAsDataURL(blob);
 890                 }
 891             } else {
 892                 preview = false;
 893             }
 894
 895             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 896             if ($.inArray(file.type, imageTypes) == -1) {
 897                 // We probably don't know how to show the file.
 898                 preview = false;
 899             }
 900
 901             var maxSize = 8 * 1024 * 1024;
 902             if (file.size > maxSize) {
 903                 // Don't kill the browser trying to load some giant image.
 904                 preview = false;
 905             }
 906
 907             if (preview) {
 908                 blobAsDataURL(file, function(url) {
 909                     var img = $('<img>')
 910                         .attr('title', tooltip)
 911                         .attr('alt', tooltip)
 912                         .attr('src', url)
 913                         .attr('style', 'height: 120px');
 914                     form.find('.attach-status').append(img);
 915                 });
 916             } else {
 917                 var img = $('<div></div>').text(tooltip);
 918                 form.find('.attach-status').append(img);
 919             }
 920         },
 921
 922         /**
 923          * Setup function -- DOES NOT trigger actions immediately.
 924          *
 925          * Initializes state for the location-lookup features in the
 926          * new-notice form. Seems to set up some event handlers for
 927          * triggering lookups and using the new values.
 928          *
 929          * @param {jQuery} form
 930          *
 931          * @fixme tl;dr
 932          * @fixme there's not good visual state update here, so users have a
 933          *        hard time figuring out if it's working or fixing if it's wrong.
 934          *
 935          */
 936         NoticeLocationAttach: function(form) {
 937             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
 938             var NLat = form.find('[name=lat]')
 939             var NLon = form.find('[name=lon]')
 940             var NLNS = form.find('[name=location_ns]').val();
 941             var NLID = form.find('[name=location_id]').val();
 942             var NLN = ''; // @fixme
 943             var NDGe = form.find('[name=notice_data-geo]');
 944             var check = form.find('[name=notice_data-geo]');
 945             var label = form.find('label.notice_data-geo');
 946
 947             function removeNoticeDataGeo(error) {
 948                 label
 949                     .attr('title', jQuery.trim(label.text()))
 950                     .removeClass('checked');
 951
 952                 form.find('[name=lat]').val('');
 953                 form.find('[name=lon]').val('');
 954                 form.find('[name=location_ns]').val('');
 955                 form.find('[name=location_id]').val('');
 956                 form.find('[name=notice_data-geo]').attr('checked', false);
 957
 958                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
 959
 960                 if (error) {
 961                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
 962                     form.find('.geo_status_wrapper .geo_status').text(error);
 963                 } else {
 964                     form.find('.geo_status_wrapper').remove();
 965                 }
 966             }
 967
 968             function getJSONgeocodeURL(geocodeURL, data) {
 969                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
 970                 $.getJSON(geocodeURL, data, function(location) {
 971                     var lns, lid;
 972
 973                     if (typeof(location.location_ns) != 'undefined') {
 974                         form.find('[name=location_ns]').val(location.location_ns);
 975                         lns = location.location_ns;
 976                     }
 977
 978                     if (typeof(location.location_id) != 'undefined') {
 979                         form.find('[name=location_id]').val(location.location_id);
 980                         lid = location.location_id;
 981                     }
 982
 983                     if (typeof(location.name) == 'undefined') {
 984                         NLN_text = data.lat + ';' + data.lon;
 985                     }
 986                     else {
 987                         NLN_text = location.name;
 988                     }
 989
 990                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
 991                     label
 992                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
 993
 994                     form.find('[name=lat]').val(data.lat);
 995                     form.find('[name=lon]').val(data.lon);
 996                     form.find('[name=location_ns]').val(lns);
 997                     form.find('[name=location_id]').val(lid);
 998                     form.find('[name=notice_data-geo]').attr('checked', true);
 999
1000                     var cookieValue = {
1001                         NLat: data.lat,
1002                         NLon: data.lon,
1003                         NLNS: lns,
1004                         NLID: lid,
1005                         NLN: NLN_text,
1006                         NLNU: location.url,
1007                         NDG: true
1008                     };
1009
1010                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1011                 });
1012             }
1013
1014             if (check.length > 0) {
1015                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1016                     check.attr('checked', false);
1017                 }
1018                 else {
1019                     check.attr('checked', true);
1020                 }
1021
1022                 var NGW = form.find('.notice_data-geo_wrap');
1023                 var geocodeURL = NGW.attr('data-api');
1024
1025                 label
1026                     .attr('title', label.text());
1027
1028                 check.change(function() {
1029                     if (check.attr('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1030                         label
1031                             .attr('title', NoticeDataGeo_text.ShareDisable)
1032                             .addClass('checked');
1033
1034                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1035                             if (navigator.geolocation) {
1036                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1037                                 navigator.geolocation.getCurrentPosition(
1038                                     function(position) {
1039                                         form.find('[name=lat]').val(position.coords.latitude);
1040                                         form.find('[name=lon]').val(position.coords.longitude);
1041
1042                                         var data = {
1043                                             lat: position.coords.latitude,
1044                                             lon: position.coords.longitude,
1045                                             token: $('#token').val()
1046                                         };
1047
1048                                         getJSONgeocodeURL(geocodeURL, data);
1049                                     },
1050
1051                                     function(error) {
1052                                         switch(error.code) {
1053                                             case error.PERMISSION_DENIED:
1054                                                 removeNoticeDataGeo('Location permission denied.');
1055                                                 break;
1056                                             case error.TIMEOUT:
1057                                                 //$('#'+SN.C.S.NoticeDataGeo).attr('checked', false);
1058                                                 removeNoticeDataGeo('Location lookup timeout.');
1059                                                 break;
1060                                         }
1061                                     },
1062
1063                                     {
1064                                         timeout: 10000
1065                                     }
1066                                 );
1067                             }
1068                             else {
1069                                 if (NLat.length > 0 && NLon.length > 0) {
1070                                     var data = {
1071                                         lat: NLat,
1072                                         lon: NLon,
1073                                         token: $('#token').val()
1074                                     };
1075
1076                                     getJSONgeocodeURL(geocodeURL, data);
1077                                 }
1078                                 else {
1079                                     removeNoticeDataGeo();
1080                                     check.remove();
1081                                     label.remove();
1082                                 }
1083                             }
1084                         }
1085                         else {
1086                             var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1087
1088                             form.find('[name=lat]').val(cookieValue.NLat);
1089                             form.find('[name=lon]').val(cookieValue.NLon);
1090                             form.find('[name=location_ns]').val(cookieValue.NLNS);
1091                             form.find('[name=location_id]').val(cookieValue.NLID);
1092                             form.find('[name=notice_data-geo]').attr('checked', cookieValue.NDG);
1093
1094                             SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1095                             label
1096                                 .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1097                                 .addClass('checked');
1098                         }
1099                     }
1100                     else {
1101                         removeNoticeDataGeo();
1102                     }
1103                 }).change();
1104             }
1105         },
1106
1107         /**
1108          * Create or update a geolocation status widget in this notice posting form.
1109          *
1110          * @param {jQuery} form
1111          * @param {String} status
1112          * @param {String} lat (optional)
1113          * @param {String} lon (optional)
1114          * @param {String} url (optional)
1115          */
1116         NoticeGeoStatus: function(form, status, lat, lon, url)
1117         {
1118             var wrapper = form.find('.geo_status_wrapper');
1119             if (wrapper.length == 0) {
1120                 wrapper = $('<div class="'+SN.C.S.Success+' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1121                 wrapper.find('button.close').click(function() {
1122                     form.find('[name=notice_data-geo]').removeAttr('checked').change();
1123                     return false;
1124                 });
1125                 form.append(wrapper);
1126             }
1127             var label;
1128             if (url) {
1129                 label = $('<a></a>').attr('href', url);
1130             } else {
1131                 label = $('<span></span>');
1132             }
1133             label.text(status);
1134             if (lat || lon) {
1135                 var latlon = lat + ';' + lon;
1136                 label.attr('title', latlon);
1137                 if (!status) {
1138                     label.text(latlon)
1139                 }
1140             }
1141             wrapper.find('.geo_status').empty().append(label);
1142         },
1143
1144         /**
1145          * Setup function -- DOES NOT trigger actions immediately.
1146          *
1147          * Initializes event handlers for the "Send direct message" link on
1148          * profile pages, setting it up to display a dialog box when clicked.
1149          *
1150          * Unlike the repeat confirmation form, this appears to fetch
1151          * the form _from the original link target_, so the form itself
1152          * doesn't need to be in the current document.
1153          *
1154          * @fixme breaks ability to open link in new window?
1155          */
1156         NewDirectMessage: function() {
1157             NDM = $('.entity_send-a-message a');
1158             NDM.attr({'href':NDM.attr('href')+'&ajax=1'});
1159             NDM.bind('click', function() {
1160                 var NDMF = $('.entity_send-a-message form');
1161                 if (NDMF.length === 0) {
1162                     $(this).addClass(SN.C.S.Processing);
1163                     $.get(NDM.attr('href'), null, function(data) {
1164                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1165                         NDMF = $('.entity_send-a-message .form_notice');
1166                         SN.U.FormNoticeXHR(NDMF);
1167                         SN.U.FormNoticeEnhancements(NDMF);
1168                         NDMF.append('<button class="close">&#215;</button>');
1169                         $('.entity_send-a-message button').click(function(){
1170                             NDMF.hide();
1171                             return false;
1172                         });
1173                         NDM.removeClass(SN.C.S.Processing);
1174                     });
1175                 }
1176                 else {
1177                     NDMF.show();
1178                     $('.entity_send-a-message textarea').focus();
1179                 }
1180                 return false;
1181             });
1182         },
1183
1184         /**
1185          * Return a date object with the current local time on the
1186          * given year, month, and day.
1187          *
1188          * @param {number} year: 4-digit year
1189          * @param {number} month: 0 == January
1190          * @param {number} day: 1 == 1
1191          * @return {Date}
1192          */
1193         GetFullYear: function(year, month, day) {
1194             var date = new Date();
1195             date.setFullYear(year, month, day);
1196
1197             return date;
1198         },
1199
1200         /**
1201          * Some sort of object interface for storing some structured
1202          * information in a cookie.
1203          *
1204          * Appears to be used to save the last-used login nickname?
1205          * That's something that browsers usually take care of for us
1206          * these days, do we really need to do it? Does anything else
1207          * use this interface?
1208          *
1209          * @fixme what is this?
1210          * @fixme should this use non-cookie local storage when available?
1211          */
1212         StatusNetInstance: {
1213             /**
1214              * @fixme what is this?
1215              */
1216             Set: function(value) {
1217                 var SNI = SN.U.StatusNetInstance.Get();
1218                 if (SNI !== null) {
1219                     value = $.extend(SNI, value);
1220                 }
1221
1222                 $.cookie(
1223                     SN.C.S.StatusNetInstance,
1224                     JSON.stringify(value),
1225                     {
1226                         path: '/',
1227                         expires: SN.U.GetFullYear(2029, 0, 1)
1228                     });
1229             },
1230
1231             /**
1232              * @fixme what is this?
1233              */
1234             Get: function() {
1235                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1236                 if (cookieValue !== null) {
1237                     return JSON.parse(cookieValue);
1238                 }
1239                 return null;
1240             },
1241
1242             /**
1243              * @fixme what is this?
1244              */
1245             Delete: function() {
1246                 $.cookie(SN.C.S.StatusNetInstance, null);
1247             }
1248         },
1249
1250         /**
1251          * Check if the current page is a timeline where the current user's
1252          * posts should be displayed immediately on success.
1253          *
1254          * @fixme this should be done in a saner way, with machine-readable
1255          * info about what page we're looking at.
1256          *
1257          * @param {DOMElement} notice: HTML chunk with formatted notice
1258          * @return boolean
1259          */
1260         belongsOnTimeline: function(notice) {
1261             var action = $("body").attr('id');
1262             if (action == 'public') {
1263                 return true;
1264             }
1265
1266             var profileLink = $('#nav_profile a').attr('href');
1267             if (profileLink) {
1268                 var authorUrl = $(notice).find('.vcard.author a.url').attr('href');
1269                 if (authorUrl == profileLink) {
1270                     if (action == 'all' || action == 'showstream') {
1271                         // Posts always show on your own friends and profile streams.
1272                         return true;
1273                     }
1274                 }
1275             }
1276
1277             // @fixme tag, group, reply timelines should be feasible as well.
1278             // Mismatch between id-based and name-based user/group links currently complicates
1279             // the lookup, since all our inline mentions contain the absolute links but the
1280             // UI links currently on the page use malleable names.
1281
1282             return false;
1283         },
1284
1285         /**
1286          * Switch to another active input sub-form.
1287          * This will hide the current form (if any), show the new one, and
1288          * update the input type tab selection state.
1289          *
1290          * @param {String} tag
1291          */
1292         switchInputFormTab: function(tag) {
1293             // The one that's current isn't current anymore
1294             $('.input_form_nav_tab.current').removeClass('current');
1295             if (tag == 'placeholder') {
1296                 // Hack: when showing the placeholder, mark the tab
1297                 // as current for 'Status'.
1298                 $('#input_form_nav_status').addClass('current');
1299             } else {
1300                 $('#input_form_nav_'+tag).addClass('current');
1301             }
1302
1303             $('.input_form.current').removeClass('current');
1304             $('#input_form_'+tag)
1305                 .addClass('current')
1306                 .find('.ajax-notice').each(function() {
1307                     var form = $(this);
1308                     SN.Init.NoticeFormSetup(form);
1309                 })
1310                 .find('textarea:first').focus();
1311         }
1312     },
1313
1314     Init: {
1315         /**
1316          * If user is logged in, run setup code for the new notice form:
1317          *
1318          *  - char counter
1319          *  - AJAX submission
1320          *  - location events
1321          *  - file upload events
1322          */
1323         NoticeForm: function() {
1324             if ($('body.user_in').length > 0) {
1325                 // SN.Init.NoticeFormSetup() will get run
1326                 // when forms get displayed for the first time...
1327
1328                 // Hack to initialize the placeholder at top
1329                 $('#input_form_placeholder input.placeholder').focus(function() {
1330                     SN.U.switchInputFormTab("status");
1331                 });
1332
1333                 // Make inline reply forms self-close when clicking out.
1334                 $('body').bind('click', function(e) {
1335                     var currentForm = $('#content .input_forms div.current');
1336                     if (currentForm.length > 0) {
1337                         if ($('#content .input_forms').has(e.target).length == 0) {
1338                             // If all fields are empty, switch back to the placeholder.
1339                             var fields = currentForm.find('textarea, input[type=text], input[type=""]');
1340                             var anything = false;
1341                             fields.each(function() {
1342                                 anything = anything || $(this).val();
1343                             });
1344                             if (!anything) {
1345                                 SN.U.switchInputFormTab("placeholder");
1346                             }
1347                         }
1348                     }
1349
1350                     var openReplies = $('li.notice-reply');
1351                     if (openReplies.length > 0) {
1352                         var target = $(e.target);
1353                         openReplies.each(function() {
1354                             // Did we click outside this one?
1355                             var replyItem = $(this);
1356                             if (replyItem.has(e.target).length == 0) {
1357                                 var textarea = replyItem.find('.notice_data-text:first');
1358                                 var cur = $.trim(textarea.val());
1359                                 // Only close if there's been no edit.
1360                                 if (cur == '' || cur == textarea.data('initialText')) {
1361                                     var parentNotice = replyItem.closest('li.notice');
1362                                     replyItem.remove();
1363                                     SN.U.NoticeInlineReplyPlaceholder(parentNotice);
1364                                 }
1365                             }
1366                         });
1367                     }
1368                 });
1369             }
1370         },
1371
1372         /**
1373          * Encapsulate notice form setup for a single form.
1374          * Plugins can add extra setup by monkeypatching this
1375          * function.
1376          *
1377          * @param {jQuery} form
1378          */
1379         NoticeFormSetup: function(form) {
1380             if (!form.data('NoticeFormSetup')) {
1381                 SN.U.NoticeLocationAttach(form);
1382                 SN.U.FormNoticeXHR(form);
1383                 SN.U.FormNoticeEnhancements(form);
1384                 SN.U.NoticeDataAttach(form);
1385                 form.data('NoticeFormSetup', true);
1386             }
1387         },
1388
1389         /**
1390          * Run setup code for notice timeline views items:
1391          *
1392          * - AJAX submission for fave/repeat/reply (if logged in)
1393          * - Attachment link extras ('more' links)
1394          */
1395         Notices: function() {
1396             if ($('body.user_in').length > 0) {
1397                 var masterForm = $('.form_notice:first');
1398                 if (masterForm.length > 0) {
1399                     SN.C.I.NoticeFormMaster = document._importNode(masterForm[0], true);
1400                 }
1401                 SN.U.NoticeRepeat();
1402                 SN.U.NoticeReply();
1403                 SN.U.NoticeInlineReplySetup();
1404             }
1405
1406             SN.U.NoticeAttachments();
1407         },
1408
1409         /**
1410          * Run setup code for user & group profile page header area if logged in:
1411          *
1412          * - AJAX submission for sub/unsub/join/leave/nudge
1413          * - AJAX form popup for direct-message
1414          */
1415         EntityActions: function() {
1416             if ($('body.user_in').length > 0) {
1417                 SN.U.NewDirectMessage();
1418             }
1419         },
1420
1421         /**
1422          * Run setup code for login form:
1423          *
1424          * - loads saved last-used-nickname from cookie
1425          * - sets event handler to save nickname to cookie on submit
1426          *
1427          * @fixme is this necessary? Browsers do their own form saving these days.
1428          */
1429         Login: function() {
1430             if (SN.U.StatusNetInstance.Get() !== null) {
1431                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1432                 if (nickname !== null) {
1433                     $('#form_login #nickname').val(nickname);
1434                 }
1435             }
1436
1437             $('#form_login').bind('submit', function() {
1438                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1439                 return true;
1440             });
1441         },
1442
1443         /**
1444          * Set up any generic 'ajax' form so it submits via AJAX with auto-replacement.
1445          */
1446         AjaxForms: function() {
1447             $('form.ajax').live('submit', function() {
1448                 SN.U.FormXHR($(this));
1449                 return false;
1450             });
1451         },
1452
1453         /**
1454          * Add logic to any file upload forms to handle file size limits,
1455          * on browsers that support basic FileAPI.
1456          */
1457         UploadForms: function () {
1458             $('input[type=file]').change(function(event) {
1459                 if (typeof this.files == "object" && this.files.length > 0) {
1460                     var size = 0;
1461                     for (var i = 0; i < this.files.length; i++) {
1462                         size += this.files[i].size;
1463                     }
1464
1465                     var max = SN.U.maxFileSize($(this.form));
1466                     if (max > 0 && size > max) {
1467                         var msg = 'File too large: maximum upload size is %d bytes.';
1468                         alert(msg.replace('%d', max));
1469
1470                         // Clear the files.
1471                         $(this).val('');
1472                         event.preventDefault();
1473                         return false;
1474                     }
1475                 }
1476             });
1477         }
1478     }
1479 };
1480
1481 /**
1482  * Run initialization functions on DOM-ready.
1483  *
1484  * Note that if we're waiting on other scripts to load, this won't happen
1485  * until that's done. To load scripts asynchronously without delaying setup,
1486  * don't start them loading until after DOM-ready time!
1487  */
1488 $(document).ready(function(){
1489     SN.Init.AjaxForms();
1490     SN.Init.UploadForms();
1491     if ($('.'+SN.C.S.FormNotice).length > 0) {
1492         SN.Init.NoticeForm();
1493     }
1494     if ($('#content .notices').length > 0) {
1495         SN.Init.Notices();
1496     }
1497     if ($('#content .entity_actions').length > 0) {
1498         SN.Init.EntityActions();
1499     }
1500     if ($('#form_login').length > 0) {
1501         SN.Init.Login();
1502     }
1503 });