functions.js

   1 var hotkeys_enabled = true;
   2
   3 function exception_error(location, e) {
   4         var msg;
   5
   6         if (e.fileName) {
   7                 var base_fname = e.fileName.substring(e.fileName.lastIndexOf("/") + 1);
   8
   9                 msg = "Exception: " + e.name + ", " + e.message +
  10                         "\nFunction: " + location + "()" +
  11                         "\nLocation: " + base_fname + ":" + e.lineNumber;
  12         } else {
  13                 msg = "Exception: " + e + "\nFunction: " + location + "()";
  14         }
  15
  16         alert(msg);
  17 }
  18
  19 function disableHotkeys() {
  20         hotkeys_enabled = false;
  21 }
  22
  23 function enableHotkeys() {
  24         hotkeys_enabled = true;
  25 }
  26
  27 function xmlhttp_ready(obj) {
  28         return obj.readyState == 4 || obj.readyState == 0 || !obj.readyState;
  29 }
  30
  31 function notify_callback() {
  32         var container = document.getElementById('notify');
  33         if (xmlhttp.readyState == 4) {
  34                 container.innerHTML=xmlhttp.responseText;
  35         }
  36 }
  37
  38 function rpc_notify_callback() {
  39         var container = document.getElementById('notify');
  40         if (xmlhttp_rpc.readyState == 4) {
  41                 container.innerHTML=xmlhttp_rpc.responseText;
  42         }
  43 }
  44
  45 function rpc_pnotify_callback() {
  46         var container = parent.document.getElementById('notify');
  47         if (xmlhttp_rpc.readyState == 4) {
  48                 container.innerHTML=xmlhttp_rpc.responseText;
  49         }
  50 }
  51
  52 function param_escape(arg) {
  53         if (typeof encodeURIComponent != 'undefined')
  54                 return encodeURIComponent(arg);
  55         else
  56                 return escape(arg);
  57 }
  58
  59 function param_unescape(arg) {
  60         if (typeof decodeURIComponent != 'undefined')
  61                 return decodeURIComponent(arg);
  62         else
  63                 return unescape(arg);
  64 }
  65
  66 function delay(gap) {
  67         var then,now;
  68         then=new Date().getTime();
  69         now=then;
  70         while((now-then)<gap) {
  71                 now=new Date().getTime();
  72         }
  73 }
  74
  75 var notify_hide_timerid = false;
  76 var notify_last_doc = false;
  77
  78 function hide_notify() {
  79         if (notify_last_doc) {
  80                 var n = notify_last_doc.getElementById("notify");
  81                 if (browser.isNS) {
  82                         if (notify_opacity >= 0) {
  83                                 notify_opacity = notify_opacity - 0.2;
  84                                 n.style.opacity = notify_opacity;
  85                                 notify_hide_timerid = window.setTimeout(hide_notify, 20);
  86                         } else {
  87                                 n.style.display = "none";
  88                                 n.style.opacity = 1;
  89                         }
  90                 } else {
  91                         n.style.display = "none";
  92                 }
  93         }
  94 }
  95
  96 function notify_real(msg, doc, no_hide, is_err) {
  97
  98         var n = doc.getElementById("notify");
  99         var nb = doc.getElementById("notify_body");
 100
 101         if (!n || !nb) return;
 102
 103         if (msg == "") {
 104                 n.style.display = "none";
 105         } else {
 106                 n.style.display = "block";
 107         }
 108
 109         if (is_err) {
 110                 n.style.backgroundColor = "#ffaaaa";
 111                 n.style.color = "white";
 112                 n.style.borderColor = "#ff0000";
 113         } else {
 114                 n.style.backgroundColor = "#fff7d5";
 115                 n.style.borderColor = "#d7c47a";
 116                 n.style.color = "black";
 117         }
 118
 119         nb.innerHTML = msg;
 120
 121         if (notify_hide_timerid) {
 122                 window.clearTimeout(notify_hide_timerid);
 123         }
 124
 125         notify_last_doc = doc;
 126         notify_opacity = 1;
 127
 128         if (!no_hide) {
 129                 notify_hide_timerid = window.setTimeout(hide_notify, 3000);
 130         }
 131 }
 132
 133 function p_notify(msg, no_hide, is_err) {
 134         notify_real(msg, parent.document, no_hide, is_err);
 135 }
 136
 137 function notify(msg, no_hide, is_err) {
 138         notify_real(msg, document, no_hide, is_err);
 139 }
 140
 141 function printLockingError() {
 142         notify("Please wait until operation finishes");}
 143
 144 var seq = "";
 145
 146 function hotkey_handler(e) {
 147
 148         var keycode;
 149
 150         if (!hotkeys_enabled) return;
 151
 152         if (window.event) {
 153                 keycode = window.event.keyCode;
 154         } else if (e) {
 155                 keycode = e.which;
 156         }
 157
 158         if (keycode == 13 || keycode == 27) {
 159                 seq = "";
 160         } else {
 161                 seq = seq + "" + keycode;
 162         }
 163
 164         if (document.getElementById("piggie")) {
 165
 166                 if (seq.match("807371717369")) {
 167                         seq = "";
 168                         localPiggieFunction(true);
 169                 } else {
 170                         localPiggieFunction(false);
 171                 }
 172         }
 173
 174         if (typeof localHotkeyHandler != 'undefined') {
 175                 try {
 176                         localHotkeyHandler(keycode);
 177                 } catch (e) {
 178                         exception_error("hotkey_handler", e);
 179                 }
 180         }
 181
 182 }
 183
 184 function cleanSelectedList(element) {
 185         var content = document.getElementById(element);
 186
 187         if (!document.getElementById("feedCatHolder")) {
 188                 for (i = 0; i < content.childNodes.length; i++) {
 189                         var child = content.childNodes[i];
 190                         try {
 191                                 child.className = child.className.replace("Selected", "");
 192                         } catch (e) {
 193                                 //
 194                         }
 195                 }
 196         } else {
 197                 for (i = 0; i < content.childNodes.length; i++) {
 198                         var child = content.childNodes[i];
 199                         if (child.id == "feedCatHolder") {
 200                                 parent.debug(child.id);
 201                                 var fcat = child.lastChild;
 202                                 for (j = 0; j < fcat.childNodes.length; j++) {
 203                                         var feed = fcat.childNodes[j];
 204                                         feed.className = feed.className.replace("Selected", "");
 205                                 }
 206                         }
 207                 }
 208         }
 209 }
 210
 211
 212 function cleanSelected(element) {
 213         var content = document.getElementById(element);
 214
 215         for (i = 0; i < content.rows.length; i++) {
 216                 content.rows[i].className = content.rows[i].className.replace("Selected", "");
 217         }
 218 }
 219
 220 function getVisibleUnreadHeadlines() {
 221         var content = document.getElementById("headlinesList");
 222
 223         var rows = new Array();
 224
 225         for (i = 0; i < content.rows.length; i++) {
 226                 var row_id = content.rows[i].id.replace("RROW-", "");
 227                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 228                                 rows.push(row_id);
 229                 }
 230         }
 231         return rows;
 232 }
 233
 234 function getVisibleHeadlineIds() {
 235
 236         var content = document.getElementById("headlinesList");
 237
 238         var rows = new Array();
 239
 240         for (i = 0; i < content.rows.length; i++) {
 241                 var row_id = content.rows[i].id.replace("RROW-", "");
 242                 if (row_id.length > 0) {
 243                                 rows.push(row_id);
 244                 }
 245         }
 246         return rows;
 247 }
 248
 249 function getFirstVisibleHeadlineId() {
 250         var rows = getVisibleHeadlineIds();
 251         return rows[0];
 252 }
 253
 254 function getLastVisibleHeadlineId() {
 255         var rows = getVisibleHeadlineIds();
 256         return rows[rows.length-1];
 257 }
 258
 259 function markHeadline(id) {
 260         var row = document.getElementById("RROW-" + id);
 261         if (row) {
 262                 var is_active = false;
 263
 264                 if (row.className.match("Active")) {
 265                         is_active = true;
 266                 }
 267                 row.className = row.className.replace("Selected", "");
 268                 row.className = row.className.replace("Active", "");
 269                 row.className = row.className.replace("Insensitive", "");
 270
 271                 if (is_active) {
 272                         row.className = row.className = "Active";
 273                 }
 274
 275                 var check = document.getElementById("RCHK-" + id);
 276
 277                 if (check) {
 278                         check.checked = true;
 279                 }
 280
 281                 row.className = row.className + "Selected";
 282
 283         }
 284 }
 285
 286 function getFeedIds() {
 287         var content = document.getElementById("feedsList");
 288
 289         var rows = new Array();
 290
 291         for (i = 0; i < content.rows.length; i++) {
 292                 var id = content.rows[i].id.replace("FEEDR-", "");
 293                 if (id.length > 0) {
 294                         rows.push(id);
 295                 }
 296         }
 297
 298         return rows;
 299 }
 300
 301 function setCookie(name, value, lifetime, path, domain, secure) {
 302
 303         var d = false;
 304
 305         if (lifetime) {
 306                 d = new Date();
 307                 d.setTime(lifetime * 1000);
 308         }
 309
 310         int_setCookie(name, value, d, path, domain, secure);
 311
 312 }
 313
 314 function int_setCookie(name, value, expires, path, domain, secure) {
 315         document.cookie= name + "=" + escape(value) +
 316                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 317                 ((path) ? "; path=" + path : "") +
 318                 ((domain) ? "; domain=" + domain : "") +
 319                 ((secure) ? "; secure" : "");
 320 }
 321
 322 function delCookie(name, path, domain) {
 323         if (getCookie(name)) {
 324                 document.cookie = name + "=" +
 325                 ((path) ? ";path=" + path : "") +
 326                 ((domain) ? ";domain=" + domain : "" ) +
 327                 ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
 328         }
 329 }
 330
 331
 332 function getCookie(name) {
 333
 334         var dc = document.cookie;
 335         var prefix = name + "=";
 336         var begin = dc.indexOf("; " + prefix);
 337         if (begin == -1) {
 338             begin = dc.indexOf(prefix);
 339             if (begin != 0) return null;
 340         }
 341         else {
 342             begin += 2;
 343         }
 344         var end = document.cookie.indexOf(";", begin);
 345         if (end == -1) {
 346             end = dc.length;
 347         }
 348         return unescape(dc.substring(begin + prefix.length, end));
 349 }
 350
 351 function disableContainerChildren(id, disable, doc) {
 352
 353         if (!doc) doc = document;
 354
 355         var container = doc.getElementById(id);
 356
 357         for (var i = 0; i < container.childNodes.length; i++) {
 358                 var child = container.childNodes[i];
 359
 360                 try {
 361                         child.disabled = disable;
 362                 } catch (E) {
 363
 364                 }
 365
 366                 if (disable) {
 367                         if (child.className && child.className.match("button")) {
 368                                 child.className = "disabledButton";
 369                         }
 370                 } else {
 371                         if (child.className && child.className.match("disabledButton")) {
 372                                 child.className = "button";
 373                         }
 374                 }
 375         }
 376
 377 }
 378
 379 function gotoPreferences() {
 380         document.location.href = "prefs.php";
 381 }
 382
 383 function gotoMain() {
 384         document.location.href = "tt-rss.php";
 385 }
 386
 387 function gotoExportOpml() {
 388         document.location.href = "opml.php?op=Export";
 389 }
 390
 391 function getActiveFeedId() {
 392         return getCookie("ttrss_vf_actfeed");
 393 }
 394
 395 function setActiveFeedId(id) {
 396         return setCookie("ttrss_vf_actfeed", id);
 397 }
 398
 399 var xmlhttp_rpc = false;
 400
 401 /*@cc_on @*/
 402 /*@if (@_jscript_version >= 5)
 403 // JScript gives us Conditional compilation, we can cope with old IE versions.
 404 // and security blocked creation of the objects.
 405 try {
 406         xmlhttp_rpc = new ActiveXObject("Msxml2.XMLHTTP");
 407 } catch (e) {
 408         try {
 409                 xmlhttp_rpc = new ActiveXObject("Microsoft.XMLHTTP");
 410         } catch (E) {
 411                 xmlhttp_rpc = false;
 412         }
 413 }
 414 @end @*/
 415
 416 if (!xmlhttp_rpc && typeof XMLHttpRequest!='undefined') {
 417         xmlhttp_rpc = new XMLHttpRequest();
 418 }
 419
 420 function parse_counters(reply, f_document, title_obj, scheduled_call) {
 421         try {
 422                 for (var l = 0; l < reply.childNodes.length; l++) {
 423                         if (!reply.childNodes[l] ||
 424                                 typeof(reply.childNodes[l].getAttribute) == "undefined") {
 425                                 // where did this come from?
 426                                 continue;
 427                         }
 428
 429                         var id = reply.childNodes[l].getAttribute("id");
 430                         var t = reply.childNodes[l].getAttribute("type");
 431                         var ctr = reply.childNodes[l].getAttribute("counter");
 432                         var error = reply.childNodes[l].getAttribute("error");
 433                         var has_img = reply.childNodes[l].getAttribute("hi");
 434                         var updated = reply.childNodes[l].getAttribute("updated");
 435
 436                         if (id == "global-unread") {
 437                                 title_obj.global_unread = ctr;
 438                                 title_obj.updateTitle();
 439                                 continue;
 440                         }
 441
 442                         if (t == "category") {
 443                                 var catctr = f_document.getElementById("FCATCTR-" + id);
 444                                 if (catctr) {
 445                                         catctr.innerHTML = "(" + ctr + " unread)";
 446                                 }
 447                                 continue;
 448                         }
 449
 450                         var feedctr = f_document.getElementById("FEEDCTR-" + id);
 451                         var feedu = f_document.getElementById("FEEDU-" + id);
 452                         var feedr = f_document.getElementById("FEEDR-" + id);
 453                         var feed_img = f_document.getElementById("FIMG-" + id);
 454                         var feedlink = f_document.getElementById("FEEDL-" + id);
 455
 456                         if (updated && feedlink) {
 457                                 if (error) {
 458                                         feedlink.title = "Error: " + error + " (" + updated + ")";
 459                                 } else {
 460                                         feedlink.title = "Updated: " + updated;
 461                                 }
 462                         }
 463
 464                         if (feedctr && feedu && feedr) {
 465
 466                                 if (feedu.innerHTML != ctr && id == getActiveFeedId() && scheduled_call) {
 467                                         var hf = title_obj.parent.frames["headlines-frame"];
 468                                         hf.location.reload(true);
 469                                 }
 470
 471                                 feedu.innerHTML = ctr;
 472
 473                                 if (error) {
 474                                         feedr.className = feedr.className.replace("feed", "error");
 475                                 } else if (id > 0) {
 476                                         feedr.className = feedr.className.replace("error", "feed");
 477                                 }
 478
 479                                 if (ctr > 0) {
 480                                         feedctr.className = "odd";
 481                                         if (!feedr.className.match("Unread")) {
 482                                                 var is_selected = feedr.className.match("Selected");
 483
 484                                                 feedr.className = feedr.className.replace("Selected", "");
 485                                                 feedr.className = feedr.className.replace("Unread", "");
 486
 487                                                 feedr.className = feedr.className + "Unread";
 488
 489                                                 if (is_selected) {
 490                                                         feedr.className = feedr.className + "Selected";
 491                                                 }
 492
 493                                         }
 494                                 } else {
 495                                         feedctr.className = "invisible";
 496                                         feedr.className = feedr.className.replace("Unread", "");
 497                                 }
 498                         }
 499                 }
 500         } catch (e) {
 501                 exception_error("parse_counters", e);
 502         }
 503 }
 504
 505 // this one is called from feedlist context
 506 // thus title_obj passed to parse_counters is parent (e.g. main ttrss window)
 507
 508 function all_counters_callback() {
 509         if (xmlhttp_rpc.readyState == 4) {
 510                 try {
 511                         if (!xmlhttp_rpc.responseXML || !xmlhttp_rpc.responseXML.firstChild) {
 512                                 notify("[all_counters_callback] backend did not return valid XML");
 513                                 return;
 514                         }
 515
 516                         if (!parent.frames["feeds-frame"]) {
 517                                 notify("[all_counters_callback] no parent feeds-frame");
 518                                 return;
 519                         }
 520
 521                         var reply = xmlhttp_rpc.responseXML.firstChild;
 522                         var f_document = parent.frames["feeds-frame"].document;
 523
 524                         parse_counters(reply, f_document, parent);
 525
 526                 } catch (e) {
 527                         exception_error("all_counters_callback", e);
 528                 }
 529         }
 530 }
 531
 532 function update_all_counters(feed) {
 533         if (xmlhttp_ready(xmlhttp_rpc)) {
 534                 var query = "backend.php?op=rpc&subop=getAllCounters";
 535
 536                 if (feed > 0) {
 537                         query = query + "&aid=" + feed;
 538                 }
 539
 540                 xmlhttp_rpc.open("GET", query, true);
 541                 xmlhttp_rpc.onreadystatechange=all_counters_callback;
 542                 xmlhttp_rpc.send(null);
 543         }
 544 }
 545
 546 function popupHelp(tid) {
 547         var w = window.open("backend.php?op=help&tid=" + tid,
 548                 "Popup Help",
 549                 "menubar=no,location=no,resizable=yes,scrollbars=yes,status=no");
 550 }
 551
 552 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 553   * * @author Sundar Dorai-Raj
 554   * * Email: sdoraira@vt.edu
 555   * * This program is free software; you can redistribute it and/or
 556   * * modify it under the terms of the GNU General Public License
 557   * * as published by the Free Software Foundation; either version 2
 558   * * of the License, or (at your option) any later version,
 559   * * provided that any use properly credits the author.
 560   * * This program is distributed in the hope that it will be useful,
 561   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 562   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 563   * * GNU General Public License for more details at http://www.gnu.org * * */
 564
 565   var numbers=".0123456789";
 566   function isNumeric(x) {
 567     // is x a String or a character?
 568     if(x.length>1) {
 569       // remove negative sign
 570       x=Math.abs(x)+"";
 571       for(j=0;j<x.length;j++) {
 572         // call isNumeric recursively for each character
 573         number=isNumeric(x.substring(j,j+1));
 574         if(!number) return number;
 575       }
 576       return number;
 577     }
 578     else {
 579       // if x is number return true
 580       if(numbers.indexOf(x)>=0) return true;
 581       return false;
 582     }
 583   }
 584
 585
 586 function hideOrShowFeeds(doc, hide) {
 587
 588         if (!doc.styleSheets) return;
 589
 590         var css_rules = doc.styleSheets[0].cssRules;
 591
 592         if (!css_rules || !css_rules.length) return;
 593
 594         for (i = 0; i < css_rules.length; i++) {
 595                 var rule = css_rules[i];
 596
 597                 if (rule.selectorText == "ul.feedList li.feed") {
 598                         if (!hide) {
 599                                 rule.style.display = "block";
 600                         } else {
 601                                 rule.style.display = "none";
 602                         }
 603                 }
 604
 605         }
 606
 607 }
 608
 609 function selectTableRow(r, do_select) {
 610         r.className = r.className.replace("Selected", "");
 611
 612         if (do_select) {
 613                 r.className = r.className + "Selected";
 614         }
 615 }
 616
 617 function selectTableRowById(elem_id, check_id, do_select) {
 618
 619         try {
 620
 621                 var row = document.getElementById(elem_id);
 622
 623                 if (row) {
 624                         selectTableRow(row, do_select);
 625                 }
 626
 627                 var check = document.getElementById(check_id);
 628
 629                 if (check) {
 630                         check.checked = do_select;
 631                 }
 632         } catch (e) {
 633                 exception_error("selectTableRowById", e);
 634         }
 635 }
 636
 637 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
 638         classcheck, reset_others) {
 639
 640         var content = document.getElementById(content_id);
 641
 642         if (!content) {
 643                 alert("[selectTableRows] Element " + content_id + " not found.");
 644                 return;
 645         }
 646
 647         for (i = 0; i < content.rows.length; i++) {
 648                 if (!classcheck || content.rows[i].className.match(classcheck)) {
 649
 650                         if (content.rows[i].id.match(prefix)) {
 651                                 selectTableRow(content.rows[i], do_select);
 652
 653                                 var row_id = content.rows[i].id.replace(prefix, "");
 654                                 var check = document.getElementById(check_prefix + row_id);
 655
 656                                 if (check) {
 657                                         check.checked = do_select;
 658                                 }
 659                         } else if (reset_others) {
 660                                 selectTableRow(content.rows[i], false);
 661
 662                                 var row_id = content.rows[i].id.replace(prefix, "");
 663                                 var check = document.getElementById(check_prefix + row_id);
 664
 665                                 if (check) {
 666                                         check.checked = false;
 667                                 }
 668
 669                         }
 670                 } else if (reset_others) {
 671                         selectTableRow(content.rows[i], false);
 672
 673                         var row_id = content.rows[i].id.replace(prefix, "");
 674                         var check = document.getElementById(check_prefix + row_id);
 675
 676                         if (check) {
 677                                 check.checked = false;
 678                         }
 679
 680                 }
 681         }
 682 }
 683
 684 function getSelectedTableRowIds(content_id, prefix) {
 685
 686         var content = document.getElementById(content_id);
 687
 688         if (!content) {
 689                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
 690                 return;
 691         }
 692
 693         var sel_rows = new Array();
 694
 695         for (i = 0; i < content.rows.length; i++) {
 696                 if (content.rows[i].id.match(prefix) &&
 697                                 content.rows[i].className.match("Selected")) {
 698
 699                         var row_id = content.rows[i].id.replace(prefix + "-", "");
 700                         sel_rows.push(row_id);
 701                 }
 702         }
 703
 704         return sel_rows;
 705
 706 }
 707
 708 function toggleSelectRowById(sender, id) {
 709         var row = document.getElementById(id);
 710
 711         if (sender.checked) {
 712                 if (!row.className.match("Selected")) {
 713                         row.className = row.className + "Selected";
 714                 }
 715         } else {
 716                 if (row.className.match("Selected")) {
 717                         row.className = row.className.replace("Selected", "");
 718                 }
 719         }
 720 }
 721
 722 function toggleSelectListRow(sender) {
 723         var parent_row = sender.parentNode;
 724
 725         if (sender.checked) {
 726                 if (!parent_row.className.match("Selected")) {
 727                         parent_row.className = parent_row.className + "Selected";
 728                 }
 729         } else {
 730                 if (parent_row.className.match("Selected")) {
 731                         parent_row.className = parent_row.className.replace("Selected", "");
 732                 }
 733         }
 734 }
 735
 736
 737 function toggleSelectRow(sender) {
 738         var parent_row = sender.parentNode.parentNode;
 739
 740         if (sender.checked) {
 741                 if (!parent_row.className.match("Selected")) {
 742                         parent_row.className = parent_row.className + "Selected";
 743                 }
 744         } else {
 745                 if (parent_row.className.match("Selected")) {
 746                         parent_row.className = parent_row.className.replace("Selected", "");
 747                 }
 748         }
 749 }
 750
 751 function openExternalUrl(url) {
 752         var w = window.open(url);
 753 }
 754
 755 function getRelativeFeedId(list, id, direction, unread_only) {
 756         if (!id) {
 757                 if (direction == "next") {
 758                         for (i = 0; i < list.childNodes.length; i++) {
 759                                 var child = list.childNodes[i];
 760                                 if (child.id && child.id == "feedCatHolder") {
 761                                         if (child.lastChild) {
 762                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 763                                                 if (cr) return cr;
 764                                         }
 765                                 } else if (child.id && child.id.match("FEEDR-")) {
 766                                         return child.id.replace('FEEDR-', '');
 767                                 }
 768                         }
 769                 }
 770
 771                 // FIXME select last feed doesn't work when only unread feeds are visible
 772
 773                 if (direction == "prev") {
 774                         for (i = list.childNodes.length-1; i >= 0; i--) {
 775                                 var child = list.childNodes[i];
 776                                 if (child.id == "feedCatHolder") {
 777                                         if (child.firstChild) {
 778                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 779                                                 if (cr) return cr;
 780                                         }
 781                                 } else if (child.id.match("FEEDR-")) {
 782
 783                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 784                                                 if (child.className != "feed") {
 785                                                         alert(child.className);
 786                                                         return child.id.replace('FEEDR-', '');
 787                                                 }
 788                                         } else {
 789                                                         return child.id.replace('FEEDR-', '');
 790                                         }
 791                                 }
 792                         }
 793                 }
 794         } else {
 795
 796                 var feed = list.ownerDocument.getElementById("FEEDR-" + getActiveFeedId());
 797
 798                 if (getCookie("ttrss_vf_hreadf") == 1) {
 799                         unread_only = true;
 800                 }
 801
 802                 if (direction == "next") {
 803
 804                         var e = feed;
 805
 806                         while (e) {
 807
 808                                 if (e.nextSibling) {
 809
 810                                         e = e.nextSibling;
 811
 812                                 } else if (e.parentNode.parentNode.nextSibling) {
 813
 814                                         var this_cat = e.parentNode.parentNode;
 815
 816                                         e = false;
 817
 818                                         if (this_cat && this_cat.nextSibling) {
 819                                                 while (!e && this_cat.nextSibling) {
 820                                                         this_cat = this_cat.nextSibling;
 821                                                         if (this_cat.id == "feedCatHolder") {
 822                                                                 e = this_cat.firstChild.firstChild;
 823                                                         }
 824                                                 }
 825                                         }
 826
 827                                 } else {
 828                                         e = false;
 829                            }
 830
 831                                 if (e) {
 832                                         if (!unread_only || (unread_only && e.className != "feed" &&
 833                                                         e.className != "error"))        {
 834                                                 return e.id.replace("FEEDR-", "");
 835                                         }
 836                                 }
 837                         }
 838
 839                 } else if (direction == "prev") {
 840
 841                         var e = feed;
 842
 843                         while (e) {
 844
 845                                 if (e.previousSibling) {
 846
 847                                         e = e.previousSibling;
 848
 849                                 } else if (e.parentNode.parentNode.previousSibling) {
 850
 851                                         var this_cat = e.parentNode.parentNode;
 852
 853                                         e = false;
 854
 855                                         if (this_cat && this_cat.previousSibling) {
 856                                                 while (!e && this_cat.previousSibling) {
 857                                                         this_cat = this_cat.previousSibling;
 858                                                         if (this_cat.id == "feedCatHolder") {
 859                                                                 e = this_cat.firstChild.lastChild;
 860                                                         }
 861                                                 }
 862                                         }
 863
 864                                 } else {
 865                                         e = false;
 866                            }
 867
 868                                 if (e) {
 869                                         if (!unread_only || (unread_only && e.className != "feed" &&
 870                                                         e.className != "error"))        {
 871                                                 return e.id.replace("FEEDR-", "");
 872                                         }
 873                                 }
 874                         }
 875                 }
 876         }
 877 }
 878
 879 function showBlockElement(id) {
 880         var elem = document.getElementById(id);
 881
 882         if (elem) {
 883                 elem.style.display = "block";
 884         } else {
 885                 alert("[showBlockElement] can't find element with id " + id);
 886         }
 887 }
 888
 889 function hideParentElement(e) {
 890         e.parentNode.style.display = "none";
 891 }
 892
 893 function dropboxSelect(e, v) {
 894         for (i = 0; i < e.length; i++) {
 895                 if (e[i].value == v) {
 896                         e.selectedIndex = i;
 897                         break;
 898                 }
 899         }
 900 }
 901
 902 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
 903 // bugfixed just a little bit :-)
 904 function getURLParam(strParamName){
 905   var strReturn = "";
 906   var strHref = window.location.href;
 907
 908   if (strHref.indexOf("#") == strHref.length-1) {
 909                 strHref = strHref.substring(0, strHref.length-1);
 910   }
 911
 912   if ( strHref.indexOf("?") > -1 ){
 913     var strQueryString = strHref.substr(strHref.indexOf("?"));
 914     var aQueryString = strQueryString.split("&");
 915     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
 916       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
 917         var aParam = aQueryString[iParam].split("=");
 918         strReturn = aParam[1];
 919         break;
 920       }
 921     }
 922   }
 923   return strReturn;
 924 }
 925
 926 function leading_zero(p) {
 927         var s = String(p);
 928         if (s.length == 1) s = "0" + s;
 929         return s;
 930 }
 931
 932 function center_element(e) {
 933
 934         try {
 935                 var c_width = document.body.clientWidth;
 936                 var c_height = document.body.clientHeight;
 937
 938                 var c_scroll = document.body.scrollTop;
 939
 940                 var e_width = e.clientWidth;
 941                 var e_height = e.clientHeight;
 942
 943                 var set_y = (c_height / 2) + c_scroll - (e_height / 2);
 944                 var set_x = (c_width / 2) - (e_width / 2);
 945
 946                 e.style.top = set_y + "px";
 947                 e.style.left = set_x + "px";
 948         } catch (e) {
 949                 exception_error("center_element", e);
 950         }
 951 }
 952
 953 function closeInfoBox() {
 954         var box = document.getElementById('infoBox');
 955         var shadow = document.getElementById('infoBoxShadow');
 956
 957         if (shadow) {
 958                 shadow.style.display = "none";
 959         } else if (box) {
 960                 box.style.display = "none";
 961         }
 962
 963         enableHotkeys();
 964 }
 965
 966
 967 function displayDlg(id, param) {
 968
 969         if (!xmlhttp_ready(xmlhttp)) {
 970                 printLockingError();
 971                 return
 972         }
 973
 974         notify("");
 975
 976         xmlhttp.open("GET", "backend.php?op=dlg&id=" +
 977                 param_escape(id) + "&param=" + param_escape(param), true);
 978         xmlhttp.onreadystatechange=infobox_callback;
 979         xmlhttp.send(null);
 980
 981         disableHotkeys();
 982
 983 }
 984
 985 function infobox_submit_callback() {
 986         if (xmlhttp.readyState == 4) {
 987                 notify(xmlhttp.responseText);
 988                 closeInfoBox();
 989
 990                 // called from prefs, reload tab
 991                 if (active_tab) {
 992                         selectTab(active_tab, false);
 993                 }
 994         }
 995 }
 996
 997 function infobox_callback() {
 998         if (xmlhttp.readyState == 4) {
 999                 var box = document.getElementById('infoBox');
1000                 var shadow = document.getElementById('infoBoxShadow');
1001                 if (box) {
1002                         box.innerHTML=xmlhttp.responseText;
1003                         if (shadow) {
1004                                 shadow.style.display = "block";
1005                         } else {
1006                                 box.style.display = "block";
1007                         }
1008                 }
1009         }
1010 }
1011
1012 function qaddFilter() {
1013
1014         if (!xmlhttp_ready(xmlhttp)) {
1015                 printLockingError();
1016                 return
1017         }
1018
1019         var regexp = document.getElementById("fadd_regexp");
1020         var match = document.getElementById("fadd_match");
1021         var feed = document.getElementById("fadd_feed");
1022         var action = document.getElementById("fadd_action");
1023
1024         if (regexp.value.length == 0) {
1025                 alert("Missing filter expression.");
1026         } else {
1027                 notify("Adding filter...");
1028
1029                 var v_match = match[match.selectedIndex].text;
1030                 var feed_id = feed[feed.selectedIndex].id;
1031                 var action_id = action[action.selectedIndex].id;
1032
1033                 xmlhttp.open("GET", "backend.php?op=pref-filters&quiet=1&subop=add&regexp=" +
1034                         param_escape(regexp.value) + "&match=" + v_match +
1035                         "&fid=" + param_escape(feed_id) + "&aid=" + param_escape(action_id), true);
1036
1037                 xmlhttp.onreadystatechange=infobox_submit_callback;
1038                 xmlhttp.send(null);
1039
1040                 regexp.value = "";
1041         }
1042
1043 }
1044
1045 function toggleSubmitNotEmpty(e, submit_id) {
1046         try {
1047                 document.getElementById(submit_id).disabled = (e.value == "")
1048         } catch (e) {
1049                 exception_error("toggleSubmitNotEmpty", e);
1050         }
1051 }
1052