js/util.js

   1 /*
   2  * StatusNet - a distributed open-source microblogging tool
   3  * Copyright (C) 2008, StatusNet, Inc.
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU Affero General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU Affero General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Affero General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * @category  UI interaction
  19  * @package   StatusNet
  20  * @author    Sarven Capadisli <csarven@status.net>
  21  * @author    Evan Prodromou <evan@status.net>
  22  * @author    Brion Vibber <brion@status.net>
  23  * @copyright 2009,2010 StatusNet, Inc.
  24  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  25  * @link      http://status.net/
  26  */
  27
  28 var SN = { // StatusNet
  29     C: { // Config
  30         I: { // Init
  31             CounterBlackout: false,
  32             MaxLength: 140,
  33             PatternUsername: /^[0-9a-zA-Z\-_.]*$/,
  34             HTTP20x30x: [200, 201, 202, 203, 204, 205, 206, 300, 301, 302, 303, 304, 305, 306, 307]
  35         },
  36
  37         /**
  38          * @fixme are these worth the trouble? They seem to mostly just duplicate
  39          * themselves while slightly obscuring the actual selector, so it's hard
  40          * to pop over to the HTML and find something.
  41          *
  42          * In theory, minification could reduce them to shorter variable names,
  43          * but at present that doesn't happen with yui-compressor.
  44          */
  45         S: { // Selector
  46             Disabled: 'disabled',
  47             Warning: 'warning',
  48             Error: 'error',
  49             Success: 'success',
  50             Processing: 'processing',
  51             CommandResult: 'command_result',
  52             FormNotice: 'form_notice',
  53             NoticeDataGeo: 'notice_data-geo',
  54             NoticeDataGeoCookie: 'NoticeDataGeo',
  55             NoticeDataGeoSelected: 'notice_data-geo_selected',
  56             StatusNetInstance:'StatusNetInstance'
  57         }
  58     },
  59
  60     /**
  61      * Map of localized message strings exported to script from the PHP
  62      * side via Action::getScriptMessages().
  63      *
  64      * Retrieve them via SN.msg(); this array is an implementation detail.
  65      *
  66      * @access private
  67      */
  68     messages: {},
  69
  70     /**
  71      * Grabs a localized string that's been previously exported to us
  72      * from server-side code via Action::getScriptMessages().
  73      *
  74      * @example alert(SN.msg('coolplugin-failed'));
  75      *
  76      * @param {String} key: string key name to pull from message index
  77      * @return matching localized message string
  78      */
  79     msg: function(key) {
  80         if (typeof SN.messages[key] == "undefined") {
  81             return '[' + key + ']';
  82         } else {
  83             return SN.messages[key];
  84         }
  85     },
  86
  87     U: { // Utils
  88         /**
  89          * Setup function -- DOES NOT trigger actions immediately.
  90          *
  91          * Sets up event handlers on the new notice form.
  92          *
  93          * @param {jQuery} form: jQuery object whose first matching element is the form
  94          * @access private
  95          */
  96         FormNoticeEnhancements: function(form) {
  97             if (jQuery.data(form[0], 'ElementData') === undefined) {
  98                 MaxLength = form.find('.count').text();
  99                 if (typeof(MaxLength) == 'undefined') {
 100                      MaxLength = SN.C.I.MaxLength;
 101                 }
 102                 jQuery.data(form[0], 'ElementData', {MaxLength:MaxLength});
 103
 104                 SN.U.Counter(form);
 105
 106                 NDT = form.find('[name=status_textarea]');
 107
 108                 NDT.bind('keyup', function(e) {
 109                     SN.U.Counter(form);
 110                 });
 111
 112                 var delayedUpdate= function(e) {
 113                     // Cut and paste events fire *before* the operation,
 114                     // so we need to trigger an update in a little bit.
 115                     // This would be so much easier if the 'change' event
 116                     // actually fired every time the value changed. :P
 117                     window.setTimeout(function() {
 118                         SN.U.Counter(form);
 119                     }, 50);
 120                 };
 121                 // Note there's still no event for mouse-triggered 'delete'.
 122                 NDT.bind('cut', delayedUpdate)
 123                    .bind('paste', delayedUpdate);
 124             }
 125             else {
 126                 form.find('.count').text(jQuery.data(form[0], 'ElementData').MaxLength);
 127             }
 128         },
 129
 130         /**
 131          * To be called from event handlers on the notice import form.
 132          * Triggers an update of the remaining-characters counter.
 133          *
 134          * Additional counter updates will be suppressed during the
 135          * next half-second to avoid flooding the layout engine with
 136          * updates, followed by another automatic check.
 137          *
 138          * The maximum length is pulled from data established by
 139          * FormNoticeEnhancements.
 140          *
 141          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 142          * @access private
 143          */
 144         Counter: function(form) {
 145             SN.C.I.FormNoticeCurrent = form;
 146
 147             var MaxLength = jQuery.data(form[0], 'ElementData').MaxLength;
 148
 149             if (MaxLength <= 0) {
 150                 return;
 151             }
 152
 153             var remaining = MaxLength - SN.U.CharacterCount(form);
 154             var counter = form.find('.count');
 155
 156             if (remaining.toString() != counter.text()) {
 157                 if (!SN.C.I.CounterBlackout || remaining === 0) {
 158                     if (counter.text() != String(remaining)) {
 159                         counter.text(remaining);
 160                     }
 161                     if (remaining < 0) {
 162                         form.addClass(SN.C.S.Warning);
 163                     } else {
 164                         form.removeClass(SN.C.S.Warning);
 165                     }
 166                     // Skip updates for the next 500ms.
 167                     // On slower hardware, updating on every keypress is unpleasant.
 168                     if (!SN.C.I.CounterBlackout) {
 169                         SN.C.I.CounterBlackout = true;
 170                         SN.C.I.FormNoticeCurrent = form;
 171                         window.setTimeout("SN.U.ClearCounterBlackout(SN.C.I.FormNoticeCurrent);", 500);
 172                     }
 173                 }
 174             }
 175         },
 176
 177         /**
 178          * Pull the count of characters in the current edit field.
 179          * Plugins replacing the edit control may need to override this.
 180          *
 181          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 182          * @return number of chars
 183          */
 184         CharacterCount: function(form) {
 185             return form.find('[name=status_textarea]').val().length;
 186         },
 187
 188         /**
 189          * Called internally after the counter update blackout period expires;
 190          * runs another update to make sure we didn't miss anything.
 191          *
 192          * @param {jQuery} form: jQuery object whose first element is the notice posting form
 193          * @access private
 194          */
 195         ClearCounterBlackout: function(form) {
 196             // Allow keyup events to poke the counter again
 197             SN.C.I.CounterBlackout = false;
 198             // Check if the string changed since we last looked
 199             SN.U.Counter(form);
 200         },
 201
 202         /**
 203          * Helper function to rewrite default HTTP form action URLs to HTTPS
 204          * so we can actually fetch them when on an SSL page in ssl=sometimes
 205          * mode.
 206          *
 207          * It would be better to output URLs that didn't hardcode protocol
 208          * and hostname in the first place...
 209          *
 210          * @param {String} url
 211          * @return string
 212          */
 213         RewriteAjaxAction: function(url) {
 214             // Quick hack: rewrite AJAX submits to HTTPS if they'd fail otherwise.
 215             if (document.location.protocol == 'https:' && url.substr(0, 5) == 'http:') {
 216                 return url.replace(/^http:\/\/[^:\/]+/, 'https://' + document.location.host);
 217             } else {
 218                 return url;
 219             }
 220         },
 221
 222         /**
 223          * Grabs form data and submits it asynchronously, with 'ajax=1'
 224          * parameter added to the rest.
 225          *
 226          * If a successful response includes another form, that form
 227          * will be extracted and copied in, replacing the original form.
 228          * If there's no form, the first paragraph will be used.
 229          *
 230          * @fixme can sometimes explode confusingly if returnd data is bogus
 231          * @fixme error handling is pretty vague
 232          * @fixme can't submit file uploads
 233          *
 234          * @param {jQuery} form: jQuery object whose first element is a form
 235          *
 236          * @access public
 237          */
 238         FormXHR: function(form) {
 239             $.ajax({
 240                 type: 'POST',
 241                 dataType: 'xml',
 242                 url: SN.U.RewriteAjaxAction(form.attr('action')),
 243                 data: form.serialize() + '&ajax=1',
 244                 beforeSend: function(xhr) {
 245                     form
 246                         .addClass(SN.C.S.Processing)
 247                         .find('.submit')
 248                             .addClass(SN.C.S.Disabled)
 249                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 250                 },
 251                 error: function (xhr, textStatus, errorThrown) {
 252                     alert(errorThrown || textStatus);
 253                 },
 254                 success: function(data, textStatus) {
 255                     if (typeof($('form', data)[0]) != 'undefined') {
 256                         form_new = document._importNode($('form', data)[0], true);
 257                         form.replaceWith(form_new);
 258                     }
 259                     else {
 260                         form.replaceWith(document._importNode($('p', data)[0], true));
 261                     }
 262                 }
 263             });
 264         },
 265
 266         /**
 267          * Setup function -- DOES NOT trigger actions immediately.
 268          *
 269          * Sets up event handlers for special-cased async submission of the
 270          * notice-posting form, including some pre-post validation.
 271          *
 272          * Unlike FormXHR() this does NOT submit the form immediately!
 273          * It sets up event handlers so that any method of submitting the
 274          * form (click on submit button, enter, submit() etc) will trigger
 275          * it properly.
 276          *
 277          * Also unlike FormXHR(), this system will use a hidden iframe
 278          * automatically to handle file uploads via <input type="file">
 279          * controls.
 280          *
 281          * @fixme tl;dr
 282          * @fixme vast swaths of duplicate code and really long variable names clutter this function up real bad
 283          * @fixme error handling is unreliable
 284          * @fixme cookieValue is a global variable, but probably shouldn't be
 285          * @fixme saving the location cache cookies should be split out
 286          * @fixme some error messages are hardcoded english: needs i18n
 287          * @fixme special-case for bookmarklet is confusing and uses a global var "self". Is this ok?
 288          *
 289          * @param {jQuery} form: jQuery object whose first element is a form
 290          *
 291          * @access public
 292          */
 293         FormNoticeXHR: function(form) {
 294             SN.C.I.NoticeDataGeo = {};
 295             form.append('<input type="hidden" name="ajax" value="1"/>');
 296
 297             // Make sure we don't have a mixed HTTP/HTTPS submission...
 298             form.attr('action', SN.U.RewriteAjaxAction(form.attr('action')));
 299
 300             /**
 301              * Show a response feedback bit under the new-notice dialog.
 302              *
 303              * @param {String} cls: CSS class name to use ('error' or 'success')
 304              * @param {String} text
 305              * @access private
 306              */
 307             var showFeedback = function(cls, text) {
 308                 form.append(
 309                     $('<p class="form_response"></p>')
 310                         .addClass(cls)
 311                         .text(text)
 312                 );
 313             };
 314
 315             /**
 316              * Hide the previous response feedback, if any.
 317              */
 318             var removeFeedback = function() {
 319                 form.find('.form_response').remove();
 320             };
 321
 322             form.ajaxForm({
 323                 dataType: 'xml',
 324                 timeout: '60000',
 325                 beforeSend: function(formData) {
 326                     if (form.find('[name=status_textarea]').val() == '') {
 327                         form.addClass(SN.C.S.Warning);
 328                         return false;
 329                     }
 330                     form
 331                         .addClass(SN.C.S.Processing)
 332                         .find('.submit')
 333                             .addClass(SN.C.S.Disabled)
 334                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 335
 336                     SN.U.normalizeGeoData(form);
 337
 338                     return true;
 339                 },
 340                 error: function (xhr, textStatus, errorThrown) {
 341                     form
 342                         .removeClass(SN.C.S.Processing)
 343                         .find('.submit')
 344                             .removeClass(SN.C.S.Disabled)
 345                             .removeAttr(SN.C.S.Disabled, SN.C.S.Disabled);
 346                     removeFeedback();
 347                     if (textStatus == 'timeout') {
 348                         // @fixme i18n
 349                         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.');
 350                     }
 351                     else {
 352                         var response = SN.U.GetResponseXML(xhr);
 353                         if ($('.'+SN.C.S.Error, response).length > 0) {
 354                             form.append(document._importNode($('.'+SN.C.S.Error, response)[0], true));
 355                         }
 356                         else {
 357                             if (parseInt(xhr.status) === 0 || jQuery.inArray(parseInt(xhr.status), SN.C.I.HTTP20x30x) >= 0) {
 358                                 form
 359                                     .resetForm()
 360                                     .find('.attach-status').remove();
 361                                 SN.U.FormNoticeEnhancements(form);
 362                             }
 363                             else {
 364                                 // @fixme i18n
 365                                 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.');
 366                             }
 367                         }
 368                     }
 369                 },
 370                 success: function(data, textStatus) {
 371                     removeFeedback();
 372                     var errorResult = $('#'+SN.C.S.Error, data);
 373                     if (errorResult.length > 0) {
 374                         showFeedback('error', errorResult.text());
 375                     }
 376                     else {
 377                         if($('body')[0].id == 'bookmarklet') {
 378                             // @fixme self is not referenced anywhere?
 379                             self.close();
 380                         }
 381
 382                         var commandResult = $('#'+SN.C.S.CommandResult, data);
 383                         if (commandResult.length > 0) {
 384                             showFeedback('success', commandResult.text());
 385                         }
 386                         else {
 387                             // New notice post was successful. If on our timeline, show it!
 388                             var notice = document._importNode($('li', data)[0], true);
 389                             var notices = $('#notices_primary .notices:first');
 390                             var replyItem = form.closest('li.notice-reply');
 391
 392                             if (replyItem.length > 0) {
 393                                 // If this is an inline reply, insert it in place.
 394                                 var id = $(notice).attr('id');
 395                                 if ($("#"+id).length == 0) {
 396                                     var parentNotice = replyItem.closest('li.notice');
 397                                     replyItem.replaceWith(notice);
 398                                     SN.U.NoticeInlineReplyPlaceholder(parentNotice);
 399                                 } else {
 400                                     // Realtime came through before us...
 401                                     replyItem.remove();
 402                                 }
 403                             } else if (notices.length > 0 && SN.U.belongsOnTimeline(notice)) {
 404                                 // Not a reply. If on our timeline, show it at the top!
 405
 406                                 if ($('#'+notice.id).length === 0) {
 407                                     var notice_irt_value = form.find('[name=inreplyto]').val();
 408                                     var notice_irt = '#notices_primary #notice-'+notice_irt_value;
 409                                     if($('body')[0].id == 'conversation') {
 410                                         if(notice_irt_value.length > 0 && $(notice_irt+' .notices').length < 1) {
 411                                             $(notice_irt).append('<ul class="notices"></ul>');
 412                                         }
 413                                         $($(notice_irt+' .notices')[0]).append(notice);
 414                                     }
 415                                     else {
 416                                         notices.prepend(notice);
 417                                     }
 418                                     $('#'+notice.id)
 419                                         .css({display:'none'})
 420                                         .fadeIn(2500);
 421                                     SN.U.NoticeWithAttachment($('#'+notice.id));
 422                                     SN.U.NoticeReplyTo($('#'+notice.id));
 423                                 }
 424                             } else {
 425                                 // Not on a timeline that this belongs on?
 426                                 // Just show a success message.
 427                                 // @fixme inline
 428                                 showFeedback('success', $('title', data).text());
 429                             }
 430                         }
 431                         form.resetForm();
 432                         form.find('[name=inreplyto]').val('');
 433                         form.find('.attach-status').remove();
 434                         SN.U.FormNoticeEnhancements(form);
 435                     }
 436                 },
 437                 complete: function(xhr, textStatus) {
 438                     form
 439                         .removeClass(SN.C.S.Processing)
 440                         .find('.submit')
 441                             .removeAttr(SN.C.S.Disabled)
 442                             .removeClass(SN.C.S.Disabled);
 443
 444                     form.find('[name=lat]').val(SN.C.I.NoticeDataGeo.NLat);
 445                     form.find('[name=lon]').val(SN.C.I.NoticeDataGeo.NLon);
 446                     form.find('[name=location_ns]').val(SN.C.I.NoticeDataGeo.NLNS);
 447                     form.find('[name=location_id]').val(SN.C.I.NoticeDataGeo.NLID);
 448                     form.find('[name=notice_data-geo]').attr('checked', SN.C.I.NoticeDataGeo.NDG);
 449                 }
 450             });
 451         },
 452
 453         FormProfileSearchXHR: function(form) {
 454             $.ajax({
 455                 type: 'POST',
 456                 dataType: 'xml',
 457                 url: form.attr('action'),
 458                 data: form.serialize() + '&ajax=1',
 459                 beforeSend: function(xhr) {
 460                     form
 461                         .addClass(SN.C.S.Processing)
 462                         .find('.submit')
 463                             .addClass(SN.C.S.Disabled)
 464                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 465                 },
 466                 error: function (xhr, textStatus, errorThrown) {
 467                     alert(errorThrown || textStatus);
 468                 },
 469                 success: function(data, textStatus) {
 470                     var results_placeholder = $('#profile_search_results');
 471                     if (typeof($('ul', data)[0]) != 'undefined') {
 472                         var list = document._importNode($('ul', data)[0], true);
 473                         results_placeholder.replaceWith(list);
 474                     }
 475                     else {
 476                         var _error = $('<li/>').append(document._importNode($('p', data)[0], true));
 477                         results_placeholder.html(_error);
 478                     }
 479                     form
 480                         .removeClass(SN.C.S.Processing)
 481                         .find('.submit')
 482                             .removeClass(SN.C.S.Disabled)
 483                             .attr(SN.C.S.Disabled, false);
 484                 }
 485             });
 486         },
 487
 488         FormPeopletagsXHR: function(form) {
 489             $.ajax({
 490                 type: 'POST',
 491                 dataType: 'xml',
 492                 url: form.attr('action'),
 493                 data: form.serialize() + '&ajax=1',
 494                 beforeSend: function(xhr) {
 495                     form.addClass(SN.C.S.Processing)
 496                         .find('.submit')
 497                             .addClass(SN.C.S.Disabled)
 498                             .attr(SN.C.S.Disabled, SN.C.S.Disabled);
 499                 },
 500                 error: function (xhr, textStatus, errorThrown) {
 501                     alert(errorThrown || textStatus);
 502                 },
 503                 success: function(data, textStatus) {
 504                     var results_placeholder = form.parents('.entity_tags');
 505                     if (typeof($('.entity_tags', data)[0]) != 'undefined') {
 506                         var tags = document._importNode($('.entity_tags', data)[0], true);
 507                         $(tags).find('.editable').append($('<button class="peopletags_edit_button"/>'));
 508                         results_placeholder.replaceWith(tags);
 509                     } else {
 510                         results_placeholder.find('p').remove();
 511                         results_placeholder.append(document._importNode($('p', data)[0], true));
 512                         form.removeClass(SN.C.S.Processing)
 513                             .find('.submit')
 514                                 .removeClass(SN.C.S.Disabled)
 515                                 .attr(SN.C.S.Disabled, false);
 516                     }
 517                 }
 518             });
 519         },
 520
 521         normalizeGeoData: function(form) {
 522             SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val();
 523             SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val();
 524             SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val();
 525             SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val();
 526             SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked'); // @fixme
 527
 528             var cookieValue = $.cookie(SN.C.S.NoticeDataGeoCookie);
 529
 530             if (cookieValue !== null && cookieValue != 'disabled') {
 531                 cookieValue = JSON.parse(cookieValue);
 532                 SN.C.I.NoticeDataGeo.NLat = form.find('[name=lat]').val(cookieValue.NLat).val();
 533                 SN.C.I.NoticeDataGeo.NLon = form.find('[name=lon]').val(cookieValue.NLon).val();
 534                 if (cookieValue.NLNS) {
 535                     SN.C.I.NoticeDataGeo.NLNS = form.find('[name=location_ns]').val(cookieValue.NLNS).val();
 536                     SN.C.I.NoticeDataGeo.NLID = form.find('[name=location_id]').val(cookieValue.NLID).val();
 537                 } else {
 538                     form.find('[name=location_ns]').val('');
 539                     form.find('[name=location_id]').val('');
 540                 }
 541             }
 542             if (cookieValue == 'disabled') {
 543                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', false).attr('checked');
 544             }
 545             else {
 546                 SN.C.I.NoticeDataGeo.NDG = form.find('[name=notice_data-geo]').attr('checked', true).attr('checked');
 547             }
 548
 549         },
 550
 551         /**
 552          * Fetch an XML DOM from an XHR's response data.
 553          *
 554          * Works around unavailable responseXML when document.domain
 555          * has been modified by Meteor or other tools, in some but not
 556          * all browsers.
 557          *
 558          * @param {XMLHTTPRequest} xhr
 559          * @return DOMDocument
 560          */
 561         GetResponseXML: function(xhr) {
 562             try {
 563                 return xhr.responseXML;
 564             } catch (e) {
 565                 return (new DOMParser()).parseFromString(xhr.responseText, "text/xml");
 566             }
 567         },
 568
 569         /**
 570          * Setup function -- DOES NOT trigger actions immediately.
 571          *
 572          * Sets up event handlers on all visible notice's reply buttons to
 573          * tweak the new-notice form with needed variables and focus it
 574          * when pushed.
 575          *
 576          * (This replaces the default reply button behavior to submit
 577          * directly to a form which comes back with a specialized page
 578          * with the form data prefilled.)
 579          *
 580          * @access private
 581          */
 582         NoticeReply: function() {
 583             if ($('#content .notice_reply').length > 0) {
 584                 $('#content .notice').each(function() { SN.U.NoticeReplyTo($(this)); });
 585             }
 586         },
 587
 588         /**
 589          * Setup function -- DOES NOT trigger actions immediately.
 590          *
 591          * Sets up event handlers on the given notice's reply button to
 592          * tweak the new-notice form with needed variables and focus it
 593          * when pushed.
 594          *
 595          * (This replaces the default reply button behavior to submit
 596          * directly to a form which comes back with a specialized page
 597          * with the form data prefilled.)
 598          *
 599          * @param {jQuery} notice: jQuery object containing one or more notices
 600          * @access private
 601          */
 602         NoticeReplyTo: function(notice) {
 603             notice.find('.notice_reply').live('click', function(e) {
 604                 e.preventDefault();
 605                 var nickname = ($('.author .nickname', notice).length > 0) ? $($('.author .nickname', notice)[0]) : $('.author .nickname.uid');
 606                 SN.U.NoticeInlineReplyTrigger(notice, '@' + nickname.text());
 607                 return false;
 608             });
 609         },
 610
 611         /**
 612          * Open up a notice's inline reply box.
 613          *
 614          * @param {jQuery} notice: jQuery object containing one notice
 615          * @param {String} initialText
 616          */
 617         NoticeInlineReplyTrigger: function(notice, initialText) {
 618             // Find the notice we're replying to...
 619             var id = $($('.notice_id', notice)[0]).text();
 620             var parentNotice = notice;
 621
 622             // Find the threaded replies view we'll be adding to...
 623             var list = notice.closest('.notices');
 624             if (list.hasClass('threaded-replies')) {
 625                 // We're replying to a reply; use reply form on the end of this list.
 626                 // We'll add our form at the end of this; grab the root notice.
 627                 parentNotice = list.closest('.notice');
 628             } else {
 629                 // We're replying to a parent notice; pull its threaded list
 630                 // and we'll add on the end of it. Will add if needed.
 631                 list = $('ul.threaded-replies', notice);
 632                 if (list.length == 0) {
 633                     list = $('<ul class="notices threaded-replies xoxo"></ul>');
 634                     notice.append(list);
 635                 }
 636             }
 637
 638             // See if the form's already open...
 639             var replyForm = $('.notice-reply-form', list);
 640
 641             var nextStep = function() {
 642                 // Override...?
 643                 replyForm.find('input[name=inreplyto]').val(id);
 644
 645                 // Set focus...
 646                 var text = replyForm.find('textarea');
 647                 if (text.length == 0) {
 648                     throw "No textarea";
 649                 }
 650                 var replyto = '';
 651                 if (initialText) {
 652                     replyto = initialText + ' ';
 653                 }
 654                 text.val(replyto + text.val().replace(RegExp(replyto, 'i'), ''));
 655                 text.data('initialText', $.trim(initialText + ''));
 656                 text.focus();
 657                 if (text[0].setSelectionRange) {
 658                     var len = text.val().length;
 659                     text[0].setSelectionRange(len,len);
 660                 }
 661             };
 662             if (replyForm.length > 0) {
 663                 // Update the existing form...
 664                 nextStep();
 665             } else {
 666                 // Remove placeholder if any
 667                 $('li.notice-reply-placeholder').remove();
 668
 669                 // Create the reply form entry at the end
 670                 var replyItem = $('li.notice-reply', list);
 671                 if (replyItem.length == 0) {
 672                     var url = $('#form_notice').attr('action');
 673                     replyItem = $('<li class="notice-reply"></li>');
 674                     $.get(url, {ajax: 1}, function(data, textStatus, xhr) {
 675                         var formEl = document._importNode($('form', data)[0], true);
 676                         replyItem.append(formEl);
 677                         list.append(replyItem);
 678
 679                         var form = replyForm = $(formEl);
 680                         SN.U.NoticeLocationAttach(form);
 681                         SN.U.FormNoticeXHR(form);
 682                         SN.U.FormNoticeEnhancements(form);
 683                         SN.U.NoticeDataAttach(form);
 684
 685                         nextStep();
 686                     });
 687                 }
 688             }
 689         },
 690
 691         /**
 692          * Setup function -- DOES NOT apply immediately.
 693          *
 694          * Sets up event handlers for favor/disfavor forms to submit via XHR.
 695          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 696          */
 697         NoticeFavor: function() {
 698             $('.form_favor').live('click', function() { SN.U.FormXHR($(this)); return false; });
 699             $('.form_disfavor').live('click', function() { SN.U.FormXHR($(this)); return false; });
 700         },
 701
 702         NoticeInlineReplyPlaceholder: function(notice) {
 703             var list = notice.find('ul.threaded-replies');
 704             var placeholder = $('<li class="notice-reply-placeholder">' +
 705                                     '<input class="placeholder">' +
 706                                 '</li>');
 707             placeholder.click(function() {
 708                 SN.U.NoticeInlineReplyTrigger(notice);
 709             });
 710             placeholder.find('input').val(SN.msg('reply_placeholder'));
 711             list.append(placeholder);
 712         },
 713
 714         /**
 715          * Setup function -- DOES NOT apply immediately.
 716          *
 717          * Sets up event handlers for favor/disfavor forms to submit via XHR.
 718          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 719          */
 720         NoticeInlineReplySetup: function() {
 721             $('.threaded-replies').each(function() {
 722                 var list = $(this);
 723                 var notice = list.closest('.notice');
 724                 SN.U.NoticeInlineReplyPlaceholder(notice);
 725             });
 726         },
 727
 728         /**
 729          * Setup function -- DOES NOT trigger actions immediately.
 730          *
 731          * Sets up event handlers for repeat forms to toss up a confirmation
 732          * popout before submitting.
 733          *
 734          * Uses 'live' rather than 'bind', so applies to future as well as present items.
 735          */
 736         NoticeRepeat: function() {
 737             $('.form_repeat').live('click', function(e) {
 738                 e.preventDefault();
 739
 740                 SN.U.NoticeRepeatConfirmation($(this));
 741                 return false;
 742             });
 743         },
 744
 745         /**
 746          * Shows a confirmation dialog box variant of the repeat button form.
 747          * This seems to use a technique where the repeat form contains
 748          * _both_ a standalone button _and_ text and buttons for a dialog.
 749          * The dialog will close after its copy of the form is submitted,
 750          * or if you click its 'close' button.
 751          *
 752          * The dialog is created by duplicating the original form and changing
 753          * its style; while clever, this is hard to generalize and probably
 754          * duplicates a lot of unnecessary HTML output.
 755          *
 756          * @fixme create confirmation dialogs through a generalized interface
 757          * that can be reused instead of hardcoded text and styles.
 758          *
 759          * @param {jQuery} form
 760          */
 761         NoticeRepeatConfirmation: function(form) {
 762             var submit_i = form.find('.submit');
 763
 764             var submit = submit_i.clone();
 765             submit
 766                 .addClass('submit_dialogbox')
 767                 .removeClass('submit');
 768             form.append(submit);
 769             submit.bind('click', function() { SN.U.FormXHR(form); return false; });
 770
 771             submit_i.hide();
 772
 773             form
 774                 .addClass('dialogbox')
 775                 .append('<button class="close">&#215;</button>')
 776                 .closest('.notice-options')
 777                     .addClass('opaque');
 778
 779             form.find('button.close').click(function(){
 780                 $(this).remove();
 781
 782                 form
 783                     .removeClass('dialogbox')
 784                     .closest('.notice-options')
 785                         .removeClass('opaque');
 786
 787                 form.find('.submit_dialogbox').remove();
 788                 form.find('.submit').show();
 789
 790                 return false;
 791             });
 792         },
 793
 794         /**
 795          * Setup function -- DOES NOT trigger actions immediately.
 796          *
 797          * Goes through all notices currently displayed and sets up attachment
 798          * handling if needed.
 799          */
 800         NoticeAttachments: function() {
 801             $('.notice a.attachment').each(function() {
 802                 SN.U.NoticeWithAttachment($(this).closest('.notice'));
 803             });
 804         },
 805
 806         /**
 807          * Setup function -- DOES NOT trigger actions immediately.
 808          *
 809          * Sets up special attachment link handling if needed. Currently this
 810          * consists only of making the "more" button used for OStatus message
 811          * cropping turn into an auto-expansion button that loads the full
 812          * text from an attachment file.
 813          *
 814          * @param {jQuery} notice
 815          */
 816         NoticeWithAttachment: function(notice) {
 817             if (notice.find('.attachment').length === 0) {
 818                 return;
 819             }
 820
 821             var attachment_more = notice.find('.attachment.more');
 822             if (attachment_more.length > 0) {
 823                 $(attachment_more[0]).click(function() {
 824                     var m = $(this);
 825                     m.addClass(SN.C.S.Processing);
 826                     $.get(m.attr('href')+'/ajax', null, function(data) {
 827                         m.parent('.entry-content').html($(data).find('#attachment_view .entry-content').html());
 828                     });
 829
 830                     return false;
 831                 }).attr('title', SN.msg('showmore_tooltip'));
 832             }
 833         },
 834
 835         /**
 836          * Setup function -- DOES NOT trigger actions immediately.
 837          *
 838          * Sets up event handlers for the file-attachment widget in the
 839          * new notice form. When a file is selected, a box will be added
 840          * below the text input showing the filename and, if supported
 841          * by the browser, a thumbnail preview.
 842          *
 843          * This preview box will also allow removing the attachment
 844          * prior to posting.
 845          *
 846          * @param {jQuery} form
 847          */
 848         NoticeDataAttach: function(form) {
 849             var NDA = form.find('input[type=file]');
 850             NDA.change(function(event) {
 851                 form.find('.attach-status').remove();
 852
 853                 var filename = $(this).val();
 854                 if (!filename) {
 855                     // No file -- we've been tricked!
 856                     return false;
 857                 }
 858
 859                 var attachStatus = $('<div class="attach-status '+SN.C.S.Success+'"><code></code> <button class="close">&#215;</button></div>');
 860                 attachStatus.find('code').text(filename);
 861                 attachStatus.find('button').click(function(){
 862                     attachStatus.remove();
 863                     NDA.val('');
 864
 865                     return false;
 866                 });
 867                 form.append(attachStatus);
 868
 869                 if (typeof this.files == "object") {
 870                     // Some newer browsers will let us fetch the files for preview.
 871                     for (var i = 0; i < this.files.length; i++) {
 872                         SN.U.PreviewAttach(form, this.files[i]);
 873                     }
 874                 }
 875             });
 876         },
 877
 878         /**
 879          * Get PHP's MAX_FILE_SIZE setting for this form;
 880          * used to apply client-side file size limit checks.
 881          *
 882          * @param {jQuery} form
 883          * @return int max size in bytes; 0 or negative means no limit
 884          */
 885         maxFileSize: function(form) {
 886             var max = $(form).find('input[name=MAX_FILE_SIZE]').attr('value');
 887             if (max) {
 888                 return parseInt(max);
 889             } else {
 890                 return 0;
 891             }
 892         },
 893
 894         /**
 895          * For browsers with FileAPI support: make a thumbnail if possible,
 896          * and append it into the attachment display widget.
 897          *
 898          * Known good:
 899          * - Firefox 3.6.6, 4.0b7
 900          * - Chrome 8.0.552.210
 901          *
 902          * Known ok metadata, can't get contents:
 903          * - Safari 5.0.2
 904          *
 905          * Known fail:
 906          * - Opera 10.63, 11 beta (no input.files interface)
 907          *
 908          * @param {jQuery} form
 909          * @param {File} file
 910          *
 911          * @todo use configured thumbnail size
 912          * @todo detect pixel size?
 913          * @todo should we render a thumbnail to a canvas and then use the smaller image?
 914          */
 915         PreviewAttach: function(form, file) {
 916             var tooltip = file.type + ' ' + Math.round(file.size / 1024) + 'KB';
 917             var preview = true;
 918
 919             var blobAsDataURL;
 920             if (typeof window.createObjectURL != "undefined") {
 921                 /**
 922                  * createObjectURL lets us reference the file directly from an <img>
 923                  * This produces a compact URL with an opaque reference to the file,
 924                  * which we can reference immediately.
 925                  *
 926                  * - Firefox 3.6.6: no
 927                  * - Firefox 4.0b7: no
 928                  * - Safari 5.0.2: no
 929                  * - Chrome 8.0.552.210: works!
 930                  */
 931                 blobAsDataURL = function(blob, callback) {
 932                     callback(window.createObjectURL(blob));
 933                 }
 934             } else if (typeof window.FileReader != "undefined") {
 935                 /**
 936                  * FileAPI's FileReader can build a data URL from a blob's contents,
 937                  * but it must read the file and build it asynchronously. This means
 938                  * we'll be passing a giant data URL around, which may be inefficient.
 939                  *
 940                  * - Firefox 3.6.6: works!
 941                  * - Firefox 4.0b7: works!
 942                  * - Safari 5.0.2: no
 943                  * - Chrome 8.0.552.210: works!
 944                  */
 945                 blobAsDataURL = function(blob, callback) {
 946                     var reader = new FileReader();
 947                     reader.onload = function(event) {
 948                         callback(reader.result);
 949                     }
 950                     reader.readAsDataURL(blob);
 951                 }
 952             } else {
 953                 preview = false;
 954             }
 955
 956             var imageTypes = ['image/png', 'image/jpeg', 'image/gif', 'image/svg+xml'];
 957             if ($.inArray(file.type, imageTypes) == -1) {
 958                 // We probably don't know how to show the file.
 959                 preview = false;
 960             }
 961
 962             var maxSize = 8 * 1024 * 1024;
 963             if (file.size > maxSize) {
 964                 // Don't kill the browser trying to load some giant image.
 965                 preview = false;
 966             }
 967
 968             if (preview) {
 969                 blobAsDataURL(file, function(url) {
 970                     var img = $('<img>')
 971                         .attr('title', tooltip)
 972                         .attr('alt', tooltip)
 973                         .attr('src', url)
 974                         .attr('style', 'height: 120px');
 975                     form.find('.attach-status').append(img);
 976                 });
 977             } else {
 978                 var img = $('<div></div>').text(tooltip);
 979                 form.find('.attach-status').append(img);
 980             }
 981         },
 982
 983         /**
 984          * Setup function -- DOES NOT trigger actions immediately.
 985          *
 986          * Initializes state for the location-lookup features in the
 987          * new-notice form. Seems to set up some event handlers for
 988          * triggering lookups and using the new values.
 989          *
 990          * @param {jQuery} form
 991          *
 992          * @fixme tl;dr
 993          * @fixme there's not good visual state update here, so users have a
 994          *        hard time figuring out if it's working or fixing if it's wrong.
 995          *
 996          */
 997         NoticeLocationAttach: function(form) {
 998             // @fixme this should not be tied to the main notice form, as there may be multiple notice forms...
 999             var NLat = form.find('[name=lat]')
1000             var NLon = form.find('[name=lon]')
1001             var NLNS = form.find('[name=location_ns]').val();
1002             var NLID = form.find('[name=location_id]').val();
1003             var NLN = ''; // @fixme
1004             var NDGe = form.find('[name=notice_data-geo]');
1005             var check = form.find('[name=notice_data-geo]');
1006             var label = form.find('label.notice_data-geo');
1007
1008             function removeNoticeDataGeo(error) {
1009                 label
1010                     .attr('title', jQuery.trim(label.text()))
1011                     .removeClass('checked');
1012
1013                 form.find('[name=lat]').val('');
1014                 form.find('[name=lon]').val('');
1015                 form.find('[name=location_ns]').val('');
1016                 form.find('[name=location_id]').val('');
1017                 form.find('[name=notice_data-geo]').attr('checked', false);
1018
1019                 $.cookie(SN.C.S.NoticeDataGeoCookie, 'disabled', { path: '/' });
1020
1021                 if (error) {
1022                     form.find('.geo_status_wrapper').removeClass('success').addClass('error');
1023                     form.find('.geo_status_wrapper .geo_status').text(error);
1024                 } else {
1025                     form.find('.geo_status_wrapper').remove();
1026                 }
1027             }
1028
1029             function getJSONgeocodeURL(geocodeURL, data) {
1030                 SN.U.NoticeGeoStatus(form, 'Looking up place name...');
1031                 $.getJSON(geocodeURL, data, function(location) {
1032                     var lns, lid;
1033
1034                     if (typeof(location.location_ns) != 'undefined') {
1035                         form.find('[name=location_ns]').val(location.location_ns);
1036                         lns = location.location_ns;
1037                     }
1038
1039                     if (typeof(location.location_id) != 'undefined') {
1040                         form.find('[name=location_id]').val(location.location_id);
1041                         lid = location.location_id;
1042                     }
1043
1044                     if (typeof(location.name) == 'undefined') {
1045                         NLN_text = data.lat + ';' + data.lon;
1046                     }
1047                     else {
1048                         NLN_text = location.name;
1049                     }
1050
1051                     SN.U.NoticeGeoStatus(form, NLN_text, data.lat, data.lon, location.url);
1052                     label
1053                         .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + NLN_text + ')');
1054
1055                     form.find('[name=lat]').val(data.lat);
1056                     form.find('[name=lon]').val(data.lon);
1057                     form.find('[name=location_ns]').val(lns);
1058                     form.find('[name=location_id]').val(lid);
1059                     form.find('[name=notice_data-geo]').attr('checked', true);
1060
1061                     var cookieValue = {
1062                         NLat: data.lat,
1063                         NLon: data.lon,
1064                         NLNS: lns,
1065                         NLID: lid,
1066                         NLN: NLN_text,
1067                         NLNU: location.url,
1068                         NDG: true
1069                     };
1070
1071                     $.cookie(SN.C.S.NoticeDataGeoCookie, JSON.stringify(cookieValue), { path: '/' });
1072                 });
1073             }
1074
1075             if (check.length > 0) {
1076                 if ($.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1077                     check.attr('checked', false);
1078                 }
1079                 else {
1080                     check.attr('checked', true);
1081                 }
1082
1083                 var NGW = form.find('.notice_data-geo_wrap');
1084                 var geocodeURL = NGW.attr('title');
1085                 NGW.removeAttr('title');
1086
1087                 label
1088                     .attr('title', label.text());
1089
1090                 check.change(function() {
1091                     if (check.attr('checked') === true || $.cookie(SN.C.S.NoticeDataGeoCookie) === null) {
1092                         label
1093                             .attr('title', NoticeDataGeo_text.ShareDisable)
1094                             .addClass('checked');
1095
1096                         if ($.cookie(SN.C.S.NoticeDataGeoCookie) === null || $.cookie(SN.C.S.NoticeDataGeoCookie) == 'disabled') {
1097                             if (navigator.geolocation) {
1098                                 SN.U.NoticeGeoStatus(form, 'Requesting location from browser...');
1099                                 navigator.geolocation.getCurrentPosition(
1100                                     function(position) {
1101                                         form.find('[name=lat]').val(position.coords.latitude);
1102                                         form.find('[name=lon]').val(position.coords.longitude);
1103
1104                                         var data = {
1105                                             lat: position.coords.latitude,
1106                                             lon: position.coords.longitude,
1107                                             token: $('#token').val()
1108                                         };
1109
1110                                         getJSONgeocodeURL(geocodeURL, data);
1111                                     },
1112
1113                                     function(error) {
1114                                         switch(error.code) {
1115                                             case error.PERMISSION_DENIED:
1116                                                 removeNoticeDataGeo('Location permission denied.');
1117                                                 break;
1118                                             case error.TIMEOUT:
1119                                                 //$('#'+SN.C.S.NoticeDataGeo).attr('checked', false);
1120                                                 removeNoticeDataGeo('Location lookup timeout.');
1121                                                 break;
1122                                         }
1123                                     },
1124
1125                                     {
1126                                         timeout: 10000
1127                                     }
1128                                 );
1129                             }
1130                             else {
1131                                 if (NLat.length > 0 && NLon.length > 0) {
1132                                     var data = {
1133                                         lat: NLat,
1134                                         lon: NLon,
1135                                         token: $('#token').val()
1136                                     };
1137
1138                                     getJSONgeocodeURL(geocodeURL, data);
1139                                 }
1140                                 else {
1141                                     removeNoticeDataGeo();
1142                                     check.remove();
1143                                     label.remove();
1144                                 }
1145                             }
1146                         }
1147                         else {
1148                             var cookieValue = JSON.parse($.cookie(SN.C.S.NoticeDataGeoCookie));
1149
1150                             form.find('[name=lat]').val(cookieValue.NLat);
1151                             form.find('[name=lon]').val(cookieValue.NLon);
1152                             form.find('[name=location_ns]').val(cookieValue.NLNS);
1153                             form.find('[name=location_id]').val(cookieValue.NLID);
1154                             form.find('[name=notice_data-geo]').attr('checked', cookieValue.NDG);
1155
1156                             SN.U.NoticeGeoStatus(form, cookieValue.NLN, cookieValue.NLat, cookieValue.NLon, cookieValue.NLNU);
1157                             label
1158                                 .attr('title', NoticeDataGeo_text.ShareDisable + ' (' + cookieValue.NLN + ')')
1159                                 .addClass('checked');
1160                         }
1161                     }
1162                     else {
1163                         removeNoticeDataGeo();
1164                     }
1165                 }).change();
1166             }
1167         },
1168
1169         /**
1170          * Create or update a geolocation status widget in this notice posting form.
1171          *
1172          * @param {jQuery} form
1173          * @param {String} status
1174          * @param {String} lat (optional)
1175          * @param {String} lon (optional)
1176          * @param {String} url (optional)
1177          */
1178         NoticeGeoStatus: function(form, status, lat, lon, url)
1179         {
1180             var wrapper = form.find('.geo_status_wrapper');
1181             if (wrapper.length == 0) {
1182                 wrapper = $('<div class="'+SN.C.S.Success+' geo_status_wrapper"><button class="close" style="float:right">&#215;</button><div class="geo_status"></div></div>');
1183                 wrapper.find('button.close').click(function() {
1184                     form.find('[name=notice_data-geo]').removeAttr('checked').change();
1185                 });
1186                 form.append(wrapper);
1187             }
1188             var label;
1189             if (url) {
1190                 label = $('<a></a>').attr('href', url);
1191             } else {
1192                 label = $('<span></span>');
1193             }
1194             label.text(status);
1195             if (lat || lon) {
1196                 var latlon = lat + ';' + lon;
1197                 label.attr('title', latlon);
1198                 if (!status) {
1199                     label.text(latlon)
1200                 }
1201             }
1202             wrapper.find('.geo_status').empty().append(label);
1203         },
1204
1205         /**
1206          * Setup function -- DOES NOT trigger actions immediately.
1207          *
1208          * Initializes event handlers for the "Send direct message" link on
1209          * profile pages, setting it up to display a dialog box when clicked.
1210          *
1211          * Unlike the repeat confirmation form, this appears to fetch
1212          * the form _from the original link target_, so the form itself
1213          * doesn't need to be in the current document.
1214          *
1215          * @fixme breaks ability to open link in new window?
1216          */
1217         NewDirectMessage: function() {
1218             NDM = $('.entity_send-a-message a');
1219             NDM.attr({'href':NDM.attr('href')+'&ajax=1'});
1220             NDM.bind('click', function() {
1221                 var NDMF = $('.entity_send-a-message form');
1222                 if (NDMF.length === 0) {
1223                     $(this).addClass(SN.C.S.Processing);
1224                     $.get(NDM.attr('href'), null, function(data) {
1225                         $('.entity_send-a-message').append(document._importNode($('form', data)[0], true));
1226                         NDMF = $('.entity_send-a-message .form_notice');
1227                         SN.U.FormNoticeXHR(NDMF);
1228                         SN.U.FormNoticeEnhancements(NDMF);
1229                         NDMF.append('<button class="close">&#215;</button>');
1230                         $('.entity_send-a-message button').click(function(){
1231                             NDMF.hide();
1232                             return false;
1233                         });
1234                         NDM.removeClass(SN.C.S.Processing);
1235                     });
1236                 }
1237                 else {
1238                     NDMF.show();
1239                     $('.entity_send-a-message textarea').focus();
1240                 }
1241                 return false;
1242             });
1243         },
1244
1245         /**
1246          * Return a date object with the current local time on the
1247          * given year, month, and day.
1248          *
1249          * @param {number} year: 4-digit year
1250          * @param {number} month: 0 == January
1251          * @param {number} day: 1 == 1
1252          * @return {Date}
1253          */
1254         GetFullYear: function(year, month, day) {
1255             var date = new Date();
1256             date.setFullYear(year, month, day);
1257
1258             return date;
1259         },
1260
1261         /**
1262          * Some sort of object interface for storing some structured
1263          * information in a cookie.
1264          *
1265          * Appears to be used to save the last-used login nickname?
1266          * That's something that browsers usually take care of for us
1267          * these days, do we really need to do it? Does anything else
1268          * use this interface?
1269          *
1270          * @fixme what is this?
1271          * @fixme should this use non-cookie local storage when available?
1272          */
1273         StatusNetInstance: {
1274             /**
1275              * @fixme what is this?
1276              */
1277             Set: function(value) {
1278                 var SNI = SN.U.StatusNetInstance.Get();
1279                 if (SNI !== null) {
1280                     value = $.extend(SNI, value);
1281                 }
1282
1283                 $.cookie(
1284                     SN.C.S.StatusNetInstance,
1285                     JSON.stringify(value),
1286                     {
1287                         path: '/',
1288                         expires: SN.U.GetFullYear(2029, 0, 1)
1289                     });
1290             },
1291
1292             /**
1293              * @fixme what is this?
1294              */
1295             Get: function() {
1296                 var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
1297                 if (cookieValue !== null) {
1298                     return JSON.parse(cookieValue);
1299                 }
1300                 return null;
1301             },
1302
1303             /**
1304              * @fixme what is this?
1305              */
1306             Delete: function() {
1307                 $.cookie(SN.C.S.StatusNetInstance, null);
1308             }
1309         },
1310
1311         /**
1312          * Check if the current page is a timeline where the current user's
1313          * posts should be displayed immediately on success.
1314          *
1315          * @fixme this should be done in a saner way, with machine-readable
1316          * info about what page we're looking at.
1317          *
1318          * @param {DOMElement} notice: HTML chunk with formatted notice
1319          * @return boolean
1320          */
1321         belongsOnTimeline: function(notice) {
1322             var action = $("body").attr('id');
1323             if (action == 'public') {
1324                 return true;
1325             }
1326
1327             var profileLink = $('#nav_profile a').attr('href');
1328             if (profileLink) {
1329                 var authorUrl = $(notice).find('.entry-title .author a.url').attr('href');
1330                 if (authorUrl == profileLink) {
1331                     if (action == 'all' || action == 'showstream') {
1332                         // Posts always show on your own friends and profile streams.
1333                         return true;
1334                     }
1335                 }
1336             }
1337
1338             // @fixme tag, group, reply timelines should be feasible as well.
1339             // Mismatch between id-based and name-based user/group links currently complicates
1340             // the lookup, since all our inline mentions contain the absolute links but the
1341             // UI links currently on the page use malleable names.
1342
1343             return false;
1344         }
1345     },
1346
1347     Init: {
1348         /**
1349          * If user is logged in, run setup code for the new notice form:
1350          *
1351          *  - char counter
1352          *  - AJAX submission
1353          *  - location events
1354          *  - file upload events
1355          */
1356         NoticeForm: function() {
1357             if ($('body.user_in').length > 0) {
1358                 $('.'+SN.C.S.FormNotice).each(function() {
1359                     var form = $(this);
1360                     SN.U.NoticeLocationAttach(form);
1361                     SN.U.FormNoticeXHR(form);
1362                     SN.U.FormNoticeEnhancements(form);
1363                     SN.U.NoticeDataAttach(form);
1364                 });
1365             }
1366         },
1367
1368         /**
1369          * Run setup code for notice timeline views items:
1370          *
1371          * - AJAX submission for fave/repeat/reply (if logged in)
1372          * - Attachment link extras ('more' links)
1373          */
1374         Notices: function() {
1375             if ($('body.user_in').length > 0) {
1376                 SN.U.NoticeFavor();
1377                 SN.U.NoticeRepeat();
1378                 SN.U.NoticeReply();
1379                 SN.U.NoticeInlineReplySetup();
1380             }
1381
1382             SN.U.NoticeAttachments();
1383         },
1384
1385         /**
1386          * Run setup code for user & group profile page header area if logged in:
1387          *
1388          * - AJAX submission for sub/unsub/join/leave/nudge
1389          * - AJAX form popup for direct-message
1390          */
1391         EntityActions: function() {
1392             if ($('body.user_in').length > 0) {
1393                 $('.form_user_subscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1394                 $('.form_user_unsubscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1395                 $('.form_group_join').live('click', function() { SN.U.FormXHR($(this)); return false; });
1396                 $('.form_group_leave').live('click', function() { SN.U.FormXHR($(this)); return false; });
1397                 $('.form_user_nudge').live('click', function() { SN.U.FormXHR($(this)); return false; });
1398                 $('.form_peopletag_subscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1399                 $('.form_peopletag_unsubscribe').live('click', function() { SN.U.FormXHR($(this)); return false; });
1400                 $('.form_user_add_peopletag').live('click', function() { SN.U.FormXHR($(this)); return false; });
1401                 $('.form_user_remove_peopletag').live('click', function() { SN.U.FormXHR($(this)); return false; });
1402
1403                 SN.U.NewDirectMessage();
1404             }
1405         },
1406
1407         ProfileSearch: function() {
1408             if ($('body.user_in').length > 0) {
1409                 $('.form_peopletag_edit_user_search input.submit').live('click', function() {
1410                     SN.U.FormProfileSearchXHR($(this).parents('form')); return false;
1411                 });
1412             }
1413         },
1414
1415         /**
1416          * Run setup code for login form:
1417          *
1418          * - loads saved last-used-nickname from cookie
1419          * - sets event handler to save nickname to cookie on submit
1420          *
1421          * @fixme is this necessary? Browsers do their own form saving these days.
1422          */
1423         Login: function() {
1424             if (SN.U.StatusNetInstance.Get() !== null) {
1425                 var nickname = SN.U.StatusNetInstance.Get().Nickname;
1426                 if (nickname !== null) {
1427                     $('#form_login #nickname').val(nickname);
1428                 }
1429             }
1430
1431             $('#form_login').bind('submit', function() {
1432                 SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
1433                 return true;
1434             });
1435         },
1436
1437         PeopletagAutocomplete: function() {
1438             $('.form_tag_user #tags').tagInput({
1439                 tags: SN.C.PtagACData,
1440                 tagSeparator: " ",
1441                 animate: false,
1442                 formatLine: function (i, e, search, matches) {
1443                   var tag = "<b>" + e.tag.substring(0, search.length) + "</b>" + e.tag.substring(search.length);
1444
1445                   var line = $("<div/>").addClass('mode-' + e.mode);
1446                     line.append($("<div class='tagInputLineTag'>" + tag
1447                         + " <em class='privacy_mode'>" + e.mode + "</em></div>"));
1448                   if (e.freq)
1449                     line.append("<div class='tagInputLineFreq'>" + e.freq + "</div>");
1450                   return line;
1451                 }
1452             });
1453         },
1454
1455         PeopleTags: function() {
1456             $('.user_profile_tags .editable').append($('<button class="peopletags_edit_button"/>'));
1457
1458             $('.peopletags_edit_button').live('click', function() {
1459                 var form = $(this).parents('dd').eq(0).find('form');
1460                 // We can buy time from the above animation
1461                 if (typeof SN.C.PtagACData === 'undefined') {
1462                     $.getJSON(_peopletagAC + '?token=' + $('#token').val(), function(data) {
1463                         SN.C.PtagACData = data;
1464                         _loadTagInput(SN.Init.PeopletagAutocomplete);
1465                     });
1466                 } else { _loadTagInput(SN.Init.PeopletagAutocomplete); }
1467
1468                 $(this).parents('ul').eq(0).fadeOut(200, function() {form.fadeIn(200).find('input#tags')});
1469             })
1470
1471             $('.user_profile_tags form .submit').live('click', function() {
1472                 SN.U.FormPeopletagsXHR($(this).parents('form')); return false;
1473             });
1474         },
1475
1476         /**
1477          * Add logic to any file upload forms to handle file size limits,
1478          * on browsers that support basic FileAPI.
1479          */
1480         UploadForms: function () {
1481             $('input[type=file]').change(function(event) {
1482                 if (typeof this.files == "object" && this.files.length > 0) {
1483                     var size = 0;
1484                     for (var i = 0; i < this.files.length; i++) {
1485                         size += this.files[i].size;
1486                     }
1487
1488                     var max = SN.U.maxFileSize($(this.form));
1489                     if (max > 0 && size > max) {
1490                         var msg = 'File too large: maximum upload size is %d bytes.';
1491                         alert(msg.replace('%d', max));
1492
1493                         // Clear the files.
1494                         $(this).val('');
1495                         event.preventDefault();
1496                         return false;
1497                     }
1498                 }
1499             });
1500         }
1501     }
1502 };
1503
1504 /**
1505  * Run initialization functions on DOM-ready.
1506  *
1507  * Note that if we're waiting on other scripts to load, this won't happen
1508  * until that's done. To load scripts asynchronously without delaying setup,
1509  * don't start them loading until after DOM-ready time!
1510  */
1511 $(document).ready(function(){
1512     SN.Init.UploadForms();
1513     if ($('.'+SN.C.S.FormNotice).length > 0) {
1514         SN.Init.NoticeForm();
1515     }
1516     if ($('#content .notices').length > 0) {
1517         SN.Init.Notices();
1518     }
1519     if ($('#content .entity_actions').length > 0) {
1520         SN.Init.EntityActions();
1521     }
1522     if ($('#form_login').length > 0) {
1523         SN.Init.Login();
1524     }
1525     if ($('#profile_search_results').length > 0) {
1526         SN.Init.ProfileSearch();
1527     }
1528     if ($('.user_profile_tags .editable').length > 0) {
1529         SN.Init.PeopleTags();
1530     }
1531 });