functions.js

   1 var hotkeys_enabled = true;
   2 var debug_mode_enabled = false;
   3 var xmlhttp_rpc = Ajax.getTransport();
   4
   5 /* add method to remove element from array */
   6
   7 Array.prototype.remove = function(s) {
   8         for (var i=0; i < this.length; i++) {
   9                 if (s == this[i]) this.splice(i, 1);
  10         }
  11 }
  12
  13 function browser_has_opacity() {
  14         return navigator.userAgent.match("Gecko") != null ||
  15                 navigator.userAgent.match("Opera") != null;
  16 }
  17
  18 function is_msie() {
  19         return navigator.userAgent.match("MSIE");
  20 }
  21
  22 function is_opera() {
  23         return navigator.userAgent.match("Opera");
  24 }
  25
  26 function is_khtml() {
  27         return navigator.userAgent.match("KHTML");
  28 }
  29
  30 function is_safari() {
  31         return navigator.userAgent.match("Safari");
  32 }
  33
  34 function exception_error(location, e, silent) {
  35         var msg;
  36
  37         if (e.fileName) {
  38                 var base_fname = e.fileName.substring(e.fileName.lastIndexOf("/") + 1);
  39
  40                 msg = "Exception: " + e.name + ", " + e.message +
  41                         "\nFunction: " + location + "()" +
  42                         "\nLocation: " + base_fname + ":" + e.lineNumber;
  43
  44         } else {
  45                 msg = "Exception: " + e + "\nFunction: " + location + "()";
  46         }
  47
  48         debug("<b>EXCEPTION: " + msg + "</b>");
  49
  50         if (!silent) {
  51                 alert(msg);
  52         }
  53 }
  54
  55 function disableHotkeys() {
  56         hotkeys_enabled = false;
  57 }
  58
  59 function enableHotkeys() {
  60         hotkeys_enabled = true;
  61 }
  62
  63 function xmlhttp_ready(obj) {
  64         return obj.readyState == 4 || obj.readyState == 0 || !obj.readyState;
  65 }
  66
  67 function logout_callback() {
  68         var container = document.getElementById('notify');
  69         if (xmlhttp.readyState == 4) {
  70                 try {
  71                         var date = new Date();
  72                         var timestamp = Math.round(date.getTime() / 1000);
  73                         window.location.href = "tt-rss.php";
  74                 } catch (e) {
  75                         exception_error("logout_callback", e);
  76                 }
  77         }
  78 }
  79
  80 function notify_callback() {
  81         var container = document.getElementById('notify');
  82         if (xmlhttp.readyState == 4) {
  83                 container.innerHTML=xmlhttp.responseText;
  84         }
  85 }
  86
  87 function rpc_notify_callback() {
  88         var container = document.getElementById('notify');
  89         if (xmlhttp_rpc.readyState == 4) {
  90                 container.innerHTML=xmlhttp_rpc.responseText;
  91         }
  92 }
  93
  94 function param_escape(arg) {
  95         if (typeof encodeURIComponent != 'undefined')
  96                 return encodeURIComponent(arg);
  97         else
  98                 return escape(arg);
  99 }
 100
 101 function param_unescape(arg) {
 102         if (typeof decodeURIComponent != 'undefined')
 103                 return decodeURIComponent(arg);
 104         else
 105                 return unescape(arg);
 106 }
 107
 108 function delay(gap) {
 109         var then,now;
 110         then=new Date().getTime();
 111         now=then;
 112         while((now-then)<gap) {
 113                 now=new Date().getTime();
 114         }
 115 }
 116
 117 var notify_hide_timerid = false;
 118
 119 function hide_notify() {
 120         var n = document.getElementById("notify");
 121         if (n) {
 122                 n.style.display = "none";
 123         }
 124 }
 125
 126 function notify_real(msg, no_hide, n_type) {
 127
 128         var n = document.getElementById("notify");
 129         var nb = document.getElementById("notify_body");
 130
 131         if (!n || !nb) return;
 132
 133         if (notify_hide_timerid) {
 134                 window.clearTimeout(notify_hide_timerid);
 135         }
 136
 137         if (msg == "") {
 138                 if (n.style.display == "block") {
 139                         notify_hide_timerid = window.setTimeout("hide_notify()", 0);
 140                 }
 141                 return;
 142         } else {
 143                 n.style.display = "block";
 144         }
 145
 146         /* types:
 147
 148                 1 - generic
 149                 2 - progress
 150                 3 - error
 151                 4 - info
 152
 153         */
 154
 155         if (typeof __ != 'undefined') {
 156                 msg = __(msg);
 157         }
 158
 159         if (n_type == 1) {
 160                 n.className = "notify";
 161         } else if (n_type == 2) {
 162                 n.className = "notifyProgress";
 163                 msg = "<img src='images/indicator_white.gif'> " + msg;
 164         } else if (n_type == 3) {
 165                 n.className = "notifyError";
 166                 msg = "<img src='images/sign_excl.png'> " + msg;
 167         } else if (n_type == 4) {
 168                 n.className = "notifyInfo";
 169                 msg = "<img src='images/sign_info.png'> " + msg;
 170         }
 171
 172 //      msg = "<img src='images/live_com_loading.gif'> " + msg;
 173
 174         nb.innerHTML = msg;
 175
 176         if (!no_hide) {
 177                 notify_hide_timerid = window.setTimeout("hide_notify()", 3000);
 178         }
 179 }
 180
 181 function notify(msg, no_hide) {
 182         notify_real(msg, no_hide, 1);
 183 }
 184
 185 function notify_progress(msg, no_hide) {
 186         notify_real(msg, no_hide, 2);
 187 }
 188
 189 function notify_error(msg, no_hide) {
 190         notify_real(msg, no_hide, 3);
 191
 192 }
 193
 194 function notify_info(msg, no_hide) {
 195         notify_real(msg, no_hide, 4);
 196 }
 197
 198 function printLockingError() {
 199         notify_info("Please wait until operation finishes.");
 200 }
 201
 202 function hotkey_handler(e) {
 203
 204         try {
 205
 206                 var keycode;
 207                 var shift_key = false;
 208
 209                 try {
 210                         shift_key = e.shiftKey;
 211                 } catch (e) {
 212
 213                 }
 214
 215                 if (!hotkeys_enabled) return;
 216
 217                 if (window.event) {
 218                         keycode = window.event.keyCode;
 219                 } else if (e) {
 220                         keycode = e.which;
 221                 }
 222
 223                 if (keycode == 82) { // r
 224                         return scheduleFeedUpdate(true);
 225                 }
 226
 227                 if (keycode == 83) { // s
 228                         return displayDlg("search", getActiveFeedId());
 229                 }
 230
 231                 if (keycode == 85) { // u
 232                         if (getActiveFeedId()) {
 233                                 return viewfeed(getActiveFeedId(), "ForceUpdate");
 234                         }
 235                 }
 236
 237                 if (keycode == 65) { // a
 238                         return toggleDispRead();
 239                 }
 240
 241                 var feedlist = document.getElementById('feedList');
 242
 243                 if (keycode == 74) { // j
 244                         var feed = getActiveFeedId();
 245                         var new_feed = getRelativeFeedId(feedlist, feed, 'prev');
 246                         if (new_feed) viewfeed(new_feed, '');
 247                 }
 248
 249                 if (keycode == 75) { // k
 250                         var feed = getActiveFeedId();
 251                         var new_feed = getRelativeFeedId(feedlist, feed, 'next');
 252                         if (new_feed) viewfeed(new_feed, '');
 253                 }
 254
 255                 if (keycode == 78 || keycode == 40) { // n, down
 256                         if (typeof moveToPost != 'undefined') {
 257                                 return moveToPost('next');
 258                         }
 259                 }
 260
 261                 if (keycode == 80 || keycode == 38) { // p, up
 262                         if (typeof moveToPost != 'undefined') {
 263                                 return moveToPost('prev');
 264                         }
 265                 }
 266
 267                 if (keycode == 68 && shift_key) { // d
 268                         if (!debug_mode_enabled) {
 269                                 document.getElementById('debug_output').style.display = 'block';
 270                                 debug('debug mode activated');
 271                         } else {
 272                                 document.getElementById('debug_output').style.display = 'none';
 273                         }
 274
 275                         debug_mode_enabled = !debug_mode_enabled;
 276                 }
 277
 278                 if (keycode == 190 && shift_key) { // >
 279                         viewFeedGoPage(1);
 280                 }
 281
 282                 if (keycode == 188 && shift_key) { // <
 283                         viewFeedGoPage(-1);
 284                 }
 285
 286                 if (keycode == 191 && shift_key) { // ?
 287                         viewFeedGoPage(0);
 288                 }
 289
 290                 if (keycode == 69 && shift_key) { // e
 291                         return editFeedDlg(getActiveFeedId());
 292                 }
 293
 294                 if (keycode == 70 && shift_key) { // f
 295                         if (getActiveFeedId()) {
 296                                 return catchupCurrentFeed();
 297                         }
 298                 }
 299
 300                 if (keycode == 80 && shift_key) { // p
 301                         if (getActiveFeedId()) {
 302                                 return catchupPage();
 303                         }
 304                 }
 305
 306                 if (typeof localHotkeyHandler != 'undefined') {
 307                         try {
 308                                 return localHotkeyHandler(e);
 309                         } catch (e) {
 310                                 exception_error("hotkey_handler, local:", e);
 311                         }
 312                 }
 313
 314                 debug("KP=" + keycode);
 315         } catch (e) {
 316                 exception_error("hotkey_handler", e);
 317         }
 318 }
 319
 320 function cleanSelectedList(element) {
 321         var content = document.getElementById(element);
 322
 323         if (!document.getElementById("feedCatHolder")) {
 324                 for (i = 0; i < content.childNodes.length; i++) {
 325                         var child = content.childNodes[i];
 326                         try {
 327                                 child.className = child.className.replace("Selected", "");
 328                         } catch (e) {
 329                                 //
 330                         }
 331                 }
 332         } else {
 333                 for (i = 0; i < content.childNodes.length; i++) {
 334                         var child = content.childNodes[i];
 335                         if (child.id == "feedCatHolder") {
 336                                 debug(child.id);
 337                                 var fcat = child.lastChild;
 338                                 for (j = 0; j < fcat.childNodes.length; j++) {
 339                                         var feed = fcat.childNodes[j];
 340                                         feed.className = feed.className.replace("Selected", "");
 341                                 }
 342                         }
 343                 }
 344         }
 345 }
 346
 347
 348 function cleanSelected(element) {
 349         var content = document.getElementById(element);
 350
 351         for (i = 0; i < content.rows.length; i++) {
 352                 content.rows[i].className = content.rows[i].className.replace("Selected", "");
 353         }
 354 }
 355
 356 function getVisibleUnreadHeadlines() {
 357         var content = document.getElementById("headlinesList");
 358
 359         var rows = new Array();
 360
 361         for (i = 0; i < content.rows.length; i++) {
 362                 var row_id = content.rows[i].id.replace("RROW-", "");
 363                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 364                                 rows.push(row_id);
 365                 }
 366         }
 367         return rows;
 368 }
 369
 370 function getVisibleHeadlineIds() {
 371
 372         var content = document.getElementById("headlinesList");
 373
 374         var rows = new Array();
 375
 376         for (i = 0; i < content.rows.length; i++) {
 377                 var row_id = content.rows[i].id.replace("RROW-", "");
 378                 if (row_id.length > 0) {
 379                                 rows.push(row_id);
 380                 }
 381         }
 382         return rows;
 383 }
 384
 385 function getFirstVisibleHeadlineId() {
 386         var rows = getVisibleHeadlineIds();
 387         return rows[0];
 388 }
 389
 390 function getLastVisibleHeadlineId() {
 391         var rows = getVisibleHeadlineIds();
 392         return rows[rows.length-1];
 393 }
 394
 395 function markHeadline(id) {
 396         var row = document.getElementById("RROW-" + id);
 397         if (row) {
 398                 var is_active = false;
 399
 400                 if (row.className.match("Active")) {
 401                         is_active = true;
 402                 }
 403                 row.className = row.className.replace("Selected", "");
 404                 row.className = row.className.replace("Active", "");
 405                 row.className = row.className.replace("Insensitive", "");
 406
 407                 if (is_active) {
 408                         row.className = row.className = "Active";
 409                 }
 410
 411                 var check = document.getElementById("RCHK-" + id);
 412
 413                 if (check) {
 414                         check.checked = true;
 415                 }
 416
 417                 row.className = row.className + "Selected";
 418
 419         }
 420 }
 421
 422 function getFeedIds() {
 423         var content = document.getElementById("feedsList");
 424
 425         var rows = new Array();
 426
 427         for (i = 0; i < content.rows.length; i++) {
 428                 var id = content.rows[i].id.replace("FEEDR-", "");
 429                 if (id.length > 0) {
 430                         rows.push(id);
 431                 }
 432         }
 433
 434         return rows;
 435 }
 436
 437 function setCookie(name, value, lifetime, path, domain, secure) {
 438
 439         var d = false;
 440
 441         if (lifetime) {
 442                 d = new Date();
 443                 d.setTime(d.getTime() + (lifetime * 1000));
 444         }
 445
 446         debug("setCookie: " + name + " => " + value + ": " + d);
 447
 448         int_setCookie(name, value, d, path, domain, secure);
 449
 450 }
 451
 452 function int_setCookie(name, value, expires, path, domain, secure) {
 453         document.cookie= name + "=" + escape(value) +
 454                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 455                 ((path) ? "; path=" + path : "") +
 456                 ((domain) ? "; domain=" + domain : "") +
 457                 ((secure) ? "; secure" : "");
 458 }
 459
 460 function delCookie(name, path, domain) {
 461         if (getCookie(name)) {
 462                 document.cookie = name + "=" +
 463                 ((path) ? ";path=" + path : "") +
 464                 ((domain) ? ";domain=" + domain : "" ) +
 465                 ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
 466         }
 467 }
 468
 469
 470 function getCookie(name) {
 471
 472         var dc = document.cookie;
 473         var prefix = name + "=";
 474         var begin = dc.indexOf("; " + prefix);
 475         if (begin == -1) {
 476             begin = dc.indexOf(prefix);
 477             if (begin != 0) return null;
 478         }
 479         else {
 480             begin += 2;
 481         }
 482         var end = document.cookie.indexOf(";", begin);
 483         if (end == -1) {
 484             end = dc.length;
 485         }
 486         return unescape(dc.substring(begin + prefix.length, end));
 487 }
 488
 489 function disableContainerChildren(id, disable, doc) {
 490
 491         if (!doc) doc = document;
 492
 493         var container = doc.getElementById(id);
 494
 495         if (!container) {
 496                 //alert("disableContainerChildren: element " + id + " not found");
 497                 return;
 498         }
 499
 500         for (var i = 0; i < container.childNodes.length; i++) {
 501                 var child = container.childNodes[i];
 502
 503                 try {
 504                         child.disabled = disable;
 505                 } catch (E) {
 506
 507                 }
 508
 509                 if (disable) {
 510                         if (child.className && child.className.match("button")) {
 511                                 child.className = "disabledButton";
 512                         }
 513                 } else {
 514                         if (child.className && child.className.match("disabledButton")) {
 515                                 child.className = "button";
 516                         }
 517                 }
 518         }
 519
 520 }
 521
 522 function gotoPreferences() {
 523         document.location.href = "prefs.php";
 524 }
 525
 526 function gotoMain() {
 527         document.location.href = "tt-rss.php";
 528 }
 529
 530 function gotoExportOpml() {
 531         document.location.href = "opml.php?op=Export";
 532 }
 533
 534 function getActiveFeedId() {
 535 //      return getCookie("ttrss_vf_actfeed");
 536         try {
 537                 debug("gAFID: " + active_feed_id);
 538                 return active_feed_id;
 539         } catch (e) {
 540                 exception_error("getActiveFeedId", e);
 541         }
 542 }
 543
 544 function activeFeedIsCat() {
 545         return active_feed_is_cat;
 546 }
 547
 548 function setActiveFeedId(id) {
 549 //      return setCookie("ttrss_vf_actfeed", id);
 550         try {
 551                 debug("sAFID(" + id + ")");
 552                 active_feed_id = id;
 553         } catch (e) {
 554                 exception_error("setActiveFeedId", e);
 555         }
 556 }
 557
 558 function parse_counters(reply, scheduled_call) {
 559         try {
 560
 561                 var feeds_found = 0;
 562
 563                 if (reply.firstChild && reply.firstChild.firstChild) {
 564                         debug("<b>wrong element passed to parse_counters, adjusting.</b>");
 565                         reply = reply.firstChild;
 566                 }
 567
 568                 for (var l = 0; l < reply.childNodes.length; l++) {
 569                         if (!reply.childNodes[l] ||
 570                                 typeof(reply.childNodes[l].getAttribute) == "undefined") {
 571                                 // where did this come from?
 572                                 continue;
 573                         }
 574
 575                         var id = reply.childNodes[l].getAttribute("id");
 576                         var t = reply.childNodes[l].getAttribute("type");
 577                         var ctr = reply.childNodes[l].getAttribute("counter");
 578                         var error = reply.childNodes[l].getAttribute("error");
 579                         var has_img = reply.childNodes[l].getAttribute("hi");
 580                         var updated = reply.childNodes[l].getAttribute("updated");
 581
 582                         if (id == "global-unread") {
 583                                 global_unread = ctr;
 584                                 updateTitle();
 585                                 continue;
 586                         }
 587
 588                         if (id == "subscribed-feeds") {
 589                                 feeds_found = ctr;
 590                                 continue;
 591                         }
 592
 593                         if (t == "category") {
 594                                 var catctr = document.getElementById("FCATCTR-" + id);
 595                                 if (catctr) {
 596                                         catctr.innerHTML = "(" + ctr + ")";
 597                                         if (ctr > 0) {
 598                                                 catctr.className = "catCtrHasUnread";
 599                                         } else {
 600                                                 catctr.className = "catCtrNoUnread";
 601                                         }
 602                                 }
 603                                 continue;
 604                         }
 605
 606                         var feedctr = document.getElementById("FEEDCTR-" + id);
 607                         var feedu = document.getElementById("FEEDU-" + id);
 608                         var feedr = document.getElementById("FEEDR-" + id);
 609                         var feed_img = document.getElementById("FIMG-" + id);
 610                         var feedlink = document.getElementById("FEEDL-" + id);
 611                         var feedupd = document.getElementById("FLUPD-" + id);
 612
 613                         if (updated && feedlink) {
 614                                 if (error) {
 615                                         feedlink.title = "Error: " + error + " (" + updated + ")";
 616                                 } else {
 617                                         feedlink.title = "Updated: " + updated;
 618                                 }
 619                         }
 620
 621                         if (updated && feedupd) {
 622                                 if (error) {
 623                                         feedupd.innerHTML = updated + " (Error)";
 624                                 } else {
 625                                         feedupd.innerHTML = updated;
 626                                 }
 627                         }
 628
 629                         if (feedctr && feedu && feedr) {
 630
 631                                 if (feedu.innerHTML != ctr && id == getActiveFeedId() && scheduled_call) {
 632                                         viewCurrentFeed();
 633                                 }
 634
 635                                 feedu.innerHTML = ctr;
 636
 637                                 if (error) {
 638                                         feedr.className = feedr.className.replace("feed", "error");
 639                                 } else if (id > 0) {
 640                                         feedr.className = feedr.className.replace("error", "feed");
 641                                 }
 642
 643                                 if (ctr > 0) {
 644                                         feedctr.className = "odd";
 645                                         if (!feedr.className.match("Unread")) {
 646                                                 var is_selected = feedr.className.match("Selected");
 647
 648                                                 feedr.className = feedr.className.replace("Selected", "");
 649                                                 feedr.className = feedr.className.replace("Unread", "");
 650
 651                                                 feedr.className = feedr.className + "Unread";
 652
 653                                                 if (is_selected) {
 654                                                         feedr.className = feedr.className + "Selected";
 655                                                 }
 656
 657                                         }
 658                                 } else {
 659                                         feedctr.className = "invisible";
 660                                         feedr.className = feedr.className.replace("Unread", "");
 661                                 }
 662                         }
 663                 }
 664
 665                 hideOrShowFeeds(document, getInitParam("hide_read_feeds") == 1);
 666
 667                 var feeds_stored = number_of_feeds;
 668
 669                 debug("Feed counters, C: " + feeds_found + ", S:" + feeds_stored);
 670
 671                 if (feeds_stored != feeds_found) {
 672                         number_of_feeds = feeds_found;
 673
 674                         if (feeds_stored != 0) {
 675                                 debug("Subscribed feed number changed, refreshing feedlist");
 676                                 setTimeout('updateFeedList(false, false)', 50);
 677                         }
 678                 }
 679
 680         } catch (e) {
 681                 exception_error("parse_counters", e);
 682         }
 683 }
 684
 685 function parse_counters_reply(xmlhttp, scheduled_call) {
 686
 687         if (!xmlhttp.responseXML) {
 688                 notify_error("Backend did not return valid XML", true);
 689                 return;
 690         }
 691
 692         var reply = xmlhttp.responseXML.firstChild;
 693
 694         if (!reply) {
 695                 notify_error("Backend did not return expected XML object", true);
 696                 updateTitle("");
 697                 return;
 698         }
 699
 700         var error_code = false;
 701         var error_msg = false;
 702
 703         if (reply.firstChild) {
 704                 error_code = reply.firstChild.getAttribute("error-code");
 705                 error_msg = reply.firstChild.getAttribute("error-msg");
 706         }
 707
 708         if (!error_code) {
 709                 error_code = reply.getAttribute("error-code");
 710                 error_msg = reply.getAttribute("error-msg");
 711         }
 712
 713         if (error_code && error_code != 0) {
 714                 debug("refetch_callback: got error code " + error_code);
 715                 return fatalError(error_code, error_msg);
 716         }
 717
 718         var counters = reply.firstChild;
 719
 720         parse_counters(counters, scheduled_call);
 721
 722         var runtime_info = counters.nextSibling;
 723
 724         parse_runtime_info(runtime_info);
 725
 726         if (getInitParam("feeds_sort_by_unread") == 1) {
 727                         resort_feedlist();
 728         }
 729
 730         hideOrShowFeeds(document, getInitParam("hide_read_feeds") == 1);
 731
 732 }
 733
 734 function all_counters_callback() {
 735         if (xmlhttp_rpc.readyState == 4) {
 736                 try {
 737 /*                      if (!xmlhttp_rpc.responseXML || !xmlhttp_rpc.responseXML.firstChild) {
 738                                 debug("[all_counters_callback] backend did not return valid XML");
 739                                 return;
 740                         }
 741
 742                         debug("in all_counters_callback : " + xmlhttp_rpc.responseXML);
 743
 744                         var reply = xmlhttp_rpc.responseXML.firstChild;
 745
 746                         var counters = reply.firstChild;
 747
 748                         parse_counters(counters);
 749
 750                         var runtime = counters.nextSibling;
 751
 752                         if (runtime) {
 753                                 parse_runtime_info(runtime);
 754                         }
 755
 756                         if (getInitParam("feeds_sort_by_unread") == 1) {
 757                                 resort_feedlist();
 758                         }
 759
 760                         hideOrShowFeeds(document, getInitParam("hide_read_feeds") == 1); */
 761
 762                         debug("in all_counters_callback");
 763
 764                         parse_counters_reply(xmlhttp_rpc);
 765
 766                 } catch (e) {
 767                         exception_error("all_counters_callback", e);
 768                 }
 769         }
 770 }
 771
 772 function get_feed_entry_unread(doc, elem) {
 773
 774         var id = elem.id.replace("FEEDR-", "");
 775
 776         if (id <= 0) {
 777                 return -1;
 778         }
 779
 780         try {
 781                 return parseInt(doc.getElementById("FEEDU-" + id).innerHTML);
 782         } catch (e) {
 783                 return -1;
 784         }
 785 }
 786
 787 function resort_category(doc, node) {
 788         debug("resort_category: " + node);
 789
 790         if (node.hasChildNodes() && node.firstChild.nextSibling != false) {
 791                 for (i = 0; i < node.childNodes.length; i++) {
 792                         if (node.childNodes[i].nodeName != "LI") { continue; }
 793
 794                         if (get_feed_entry_unread(doc, node.childNodes[i]) < 0) {
 795                                 continue;
 796                         }
 797
 798                         for (j = i+1; j < node.childNodes.length; j++) {
 799                                 if (node.childNodes[j].nodeName != "LI") { continue; }
 800
 801                                 var tmp_val = get_feed_entry_unread(doc, node.childNodes[i]);
 802                                 var cur_val = get_feed_entry_unread(doc, node.childNodes[j]);
 803
 804                                 if (cur_val > tmp_val) {
 805                                         tempnode_i = node.childNodes[i].cloneNode(true);
 806                                         tempnode_j = node.childNodes[j].cloneNode(true);
 807                                         node.replaceChild(tempnode_i, node.childNodes[j]);
 808                                         node.replaceChild(tempnode_j, node.childNodes[i]);
 809                                 }
 810                         }
 811
 812                 }
 813         }
 814
 815 }
 816
 817 function resort_feedlist() {
 818         debug("resort_feedlist");
 819
 820         var fd = document;
 821
 822         if (fd.getElementById("feedCatHolder")) {
 823
 824                 var feeds = fd.getElementById("feedList");
 825                 var child = feeds.firstChild;
 826
 827                 while (child) {
 828
 829                         if (child.id == "feedCatHolder") {
 830                                 resort_category(fd, child.firstChild);
 831                         }
 832
 833                         child = child.nextSibling;
 834                 }
 835
 836         } else {
 837                 resort_category(fd, fd.getElementById("feedList"));
 838         }
 839 }
 840
 841 function update_all_counters(feed) {
 842         if (xmlhttp_ready(xmlhttp_rpc)) {
 843                 var query = "backend.php?op=rpc&subop=getAllCounters";
 844
 845                 if (feed > 0) {
 846                         query = query + "&aid=" + feed;
 847                 }
 848
 849                 if (tagsAreDisplayed()) {
 850                         query = query + "&omode=lt";
 851                 } else {
 852                         query = query + "&omode=flc";
 853                 }
 854
 855                 debug("update_all_counters QUERY: " + query);
 856
 857                 var date = new Date();
 858                 var timestamp = Math.round(date.getTime() / 1000);
 859                 query = query + "&ts=" + timestamp
 860
 861                 xmlhttp_rpc.open("GET", query, true);
 862                 xmlhttp_rpc.onreadystatechange=all_counters_callback;
 863                 xmlhttp_rpc.send(null);
 864         }
 865 }
 866
 867 function popupHelp(tid) {
 868         var w = window.open("backend.php?op=help&tid=" + tid,
 869                 "Popup Help",
 870                 "menubar=no,location=no,resizable=yes,scrollbars=yes,status=no");
 871 }
 872
 873 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 874   * * @author Sundar Dorai-Raj
 875   * * Email: sdoraira@vt.edu
 876   * * This program is free software; you can redistribute it and/or
 877   * * modify it under the terms of the GNU General Public License
 878   * * as published by the Free Software Foundation; either version 2
 879   * * of the License, or (at your option) any later version,
 880   * * provided that any use properly credits the author.
 881   * * This program is distributed in the hope that it will be useful,
 882   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 883   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 884   * * GNU General Public License for more details at http://www.gnu.org * * */
 885
 886   var numbers=".0123456789";
 887   function isNumeric(x) {
 888     // is x a String or a character?
 889     if(x.length>1) {
 890       // remove negative sign
 891       x=Math.abs(x)+"";
 892       for(j=0;j<x.length;j++) {
 893         // call isNumeric recursively for each character
 894         number=isNumeric(x.substring(j,j+1));
 895         if(!number) return number;
 896       }
 897       return number;
 898     }
 899     else {
 900       // if x is number return true
 901       if(numbers.indexOf(x)>=0) return true;
 902       return false;
 903     }
 904   }
 905
 906
 907 function hideOrShowFeeds(doc, hide) {
 908
 909         debug("hideOrShowFeeds: " + doc + ", " + hide);
 910
 911         var fd = document;
 912
 913         var list = fd.getElementById("feedList");
 914
 915         if (fd.getElementById("feedCatHolder")) {
 916
 917                 var feeds = fd.getElementById("feedList");
 918                 var child = feeds.firstChild;
 919
 920                 while (child) {
 921
 922                         if (child.id == "feedCatHolder") {
 923                                 hideOrShowFeedsCategory(fd, child.firstChild, hide, child.previousSibling);
 924                         }
 925
 926                         child = child.nextSibling;
 927                 }
 928
 929         } else {
 930                 hideOrShowFeedsCategory(fd, fd.getElementById("feedList"), hide);
 931         }
 932 }
 933
 934 function hideOrShowFeedsCategory(doc, node, hide, cat_node) {
 935
 936 //      debug("hideOrShowFeedsCategory: " + node + " (" + hide + ")");
 937
 938         var cat_unread = 0;
 939
 940         if (!node) {
 941                 debug("hideOrShowFeeds: passed node is null, aborting");
 942                 return;
 943         }
 944
 945         if (node.hasChildNodes() && node.firstChild.nextSibling != false) {
 946                 for (i = 0; i < node.childNodes.length; i++) {
 947                         if (node.childNodes[i].nodeName != "LI") { continue; }
 948
 949                         if (node.childNodes[i].style != undefined) {
 950
 951                                 var has_unread = (node.childNodes[i].className != "feed" &&
 952                                         node.childNodes[i].className != "tag");
 953
 954         //                      debug(node.childNodes[i].id + " --> " + has_unread);
 955
 956                                 if (hide && !has_unread) {
 957                                         node.childNodes[i].style.display = "none";
 958                                 }
 959
 960                                 if (!hide) {
 961                                         node.childNodes[i].style.display = "list-item";
 962                                 }
 963
 964                                 if (has_unread) {
 965                                         node.childNodes[i].style.display = "list-item";
 966                                         cat_unread++;
 967                                 }
 968                         }
 969                 }
 970         }
 971
 972         if (cat_unread == 0) {
 973                 if (cat_node.style == undefined) {
 974                         debug("ERROR: supplied cat_node " + cat_node +
 975                                 " has no styles. WTF?");
 976                         return;
 977                 }
 978                 if (hide) {
 979                         cat_node.style.display = "none";
 980                 } else {
 981                         cat_node.style.display = "list-item";
 982                 }
 983         } else {
 984                 try {
 985                         cat_node.style.display = "list-item";
 986                 } catch (e) {
 987                         debug(e);
 988                 }
 989         }
 990
 991 //      debug("unread for category: " + cat_unread);
 992 }
 993
 994 function selectTableRow(r, do_select) {
 995         r.className = r.className.replace("Selected", "");
 996
 997         if (do_select) {
 998                 r.className = r.className + "Selected";
 999         }
1000 }
1001
1002 function selectTableRowById(elem_id, check_id, do_select) {
1003
1004         try {
1005
1006                 var row = document.getElementById(elem_id);
1007
1008                 if (row) {
1009                         selectTableRow(row, do_select);
1010                 }
1011
1012                 var check = document.getElementById(check_id);
1013
1014                 if (check) {
1015                         check.checked = do_select;
1016                 }
1017         } catch (e) {
1018                 exception_error("selectTableRowById", e);
1019         }
1020 }
1021
1022 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
1023         classcheck, reset_others) {
1024
1025         var content = document.getElementById(content_id);
1026
1027         if (!content) {
1028                 alert("[selectTableRows] Element " + content_id + " not found.");
1029                 return;
1030         }
1031
1032         for (i = 0; i < content.rows.length; i++) {
1033                 if (!classcheck || content.rows[i].className.match(classcheck)) {
1034
1035                         if (content.rows[i].id.match(prefix)) {
1036                                 selectTableRow(content.rows[i], do_select);
1037
1038                                 var row_id = content.rows[i].id.replace(prefix, "");
1039                                 var check = document.getElementById(check_prefix + row_id);
1040
1041                                 if (check) {
1042                                         check.checked = do_select;
1043                                 }
1044                         } else if (reset_others) {
1045                                 selectTableRow(content.rows[i], false);
1046
1047                                 var row_id = content.rows[i].id.replace(prefix, "");
1048                                 var check = document.getElementById(check_prefix + row_id);
1049
1050                                 if (check) {
1051                                         check.checked = false;
1052                                 }
1053
1054                         }
1055                 } else if (reset_others) {
1056                         selectTableRow(content.rows[i], false);
1057
1058                         var row_id = content.rows[i].id.replace(prefix, "");
1059                         var check = document.getElementById(check_prefix + row_id);
1060
1061                         if (check) {
1062                                 check.checked = false;
1063                         }
1064
1065                 }
1066         }
1067 }
1068
1069 function getSelectedTableRowIds(content_id, prefix) {
1070
1071         var content = document.getElementById(content_id);
1072
1073         if (!content) {
1074                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
1075                 return;
1076         }
1077
1078         var sel_rows = new Array();
1079
1080         for (i = 0; i < content.rows.length; i++) {
1081                 if (content.rows[i].id.match(prefix) &&
1082                                 content.rows[i].className.match("Selected")) {
1083
1084                         var row_id = content.rows[i].id.replace(prefix + "-", "");
1085                         sel_rows.push(row_id);
1086                 }
1087         }
1088
1089         return sel_rows;
1090
1091 }
1092
1093 function toggleSelectRowById(sender, id) {
1094         var row = document.getElementById(id);
1095
1096         if (sender.checked) {
1097                 if (!row.className.match("Selected")) {
1098                         row.className = row.className + "Selected";
1099                 }
1100         } else {
1101                 if (row.className.match("Selected")) {
1102                         row.className = row.className.replace("Selected", "");
1103                 }
1104         }
1105 }
1106
1107 function toggleSelectListRow(sender) {
1108         var parent_row = sender.parentNode;
1109
1110         if (sender.checked) {
1111                 if (!parent_row.className.match("Selected")) {
1112                         parent_row.className = parent_row.className + "Selected";
1113                 }
1114         } else {
1115                 if (parent_row.className.match("Selected")) {
1116                         parent_row.className = parent_row.className.replace("Selected", "");
1117                 }
1118         }
1119 }
1120
1121 function tSR(sender) {
1122         return toggleSelectRow(sender);
1123 }
1124
1125 function toggleSelectRow(sender) {
1126         var parent_row = sender.parentNode.parentNode;
1127
1128         if (sender.checked) {
1129                 if (!parent_row.className.match("Selected")) {
1130                         parent_row.className = parent_row.className + "Selected";
1131                 }
1132         } else {
1133                 if (parent_row.className.match("Selected")) {
1134                         parent_row.className = parent_row.className.replace("Selected", "");
1135                 }
1136         }
1137 }
1138
1139 function openExternalUrl(url) {
1140         var w = window.open(url);
1141 }
1142
1143 function getRelativeFeedId(list, id, direction, unread_only) {
1144         if (!id) {
1145                 if (direction == "next") {
1146                         for (i = 0; i < list.childNodes.length; i++) {
1147                                 var child = list.childNodes[i];
1148                                 if (child.id && child.id == "feedCatHolder") {
1149                                         if (child.lastChild) {
1150                                                 var cr = getRelativeFeedId(child.firstChild, id, direction, unread_only);
1151                                                 if (cr) return cr;
1152                                         }
1153                                 } else if (child.id && child.id.match("FEEDR-")) {
1154                                         return child.id.replace('FEEDR-', '');
1155                                 }
1156                         }
1157                 }
1158
1159                 // FIXME select last feed doesn't work when only unread feeds are visible
1160
1161                 if (direction == "prev") {
1162                         for (i = list.childNodes.length-1; i >= 0; i--) {
1163                                 var child = list.childNodes[i];
1164                                 if (child.id == "feedCatHolder" && child.className != "invisible") {
1165                                         if (child.firstChild) {
1166                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
1167                                                 if (cr) return cr;
1168                                         }
1169                                 } else if (child.id.match("FEEDR-")) {
1170
1171                                         if (getInitParam("hide_read_feeds") == 1) {
1172                                                 if (child.className != "feed") {
1173 //                                                      alert(child.className);
1174                                                         return child.id.replace('FEEDR-', '');
1175                                                 }
1176                                         } else {
1177                                                         return child.id.replace('FEEDR-', '');
1178                                         }
1179                                 }
1180                         }
1181                 }
1182         } else {
1183
1184                 var feed = list.ownerDocument.getElementById("FEEDR-" + id);
1185
1186                 if (getInitParam("hide_read_feeds") == 1) {
1187                         unread_only = true;
1188                 }
1189
1190                 if (direction == "next") {
1191
1192                         var e = feed;
1193
1194                         while (e) {
1195
1196                                 if (e.nextSibling) {
1197
1198                                         e = e.nextSibling;
1199
1200                                 } else if (e.parentNode.parentNode.nextSibling) {
1201
1202                                         var this_cat = e.parentNode.parentNode;
1203
1204                                         e = false;
1205
1206                                         if (this_cat && this_cat.nextSibling) {
1207                                                 while (!e && this_cat.nextSibling) {
1208                                                         this_cat = this_cat.nextSibling;
1209                                                         if (this_cat.id == "feedCatHolder") {
1210                                                                 e = this_cat.firstChild.firstChild;
1211                                                         }
1212                                                 }
1213                                         }
1214
1215                                 } else {
1216                                         e = false;
1217                            }
1218
1219                                 if (e) {
1220                                         if (!unread_only || (unread_only && e.className != "feed" &&
1221                                                         e.className.match("feed")))     {
1222                                                 if (e.parentNode.parentNode && e.parentNode.parentNode.className
1223                                                         != "invisible") {
1224                                                         return e.id.replace("FEEDR-", "");
1225                                                 }
1226                                         }
1227                                 }
1228                         }
1229
1230                 } else if (direction == "prev") {
1231
1232                         var e = feed;
1233
1234                         while (e) {
1235
1236                                 if (e.previousSibling) {
1237
1238                                         e = e.previousSibling;
1239
1240                                 } else if (e.parentNode.parentNode.previousSibling) {
1241
1242                                         var this_cat = e.parentNode.parentNode;
1243
1244                                         e = false;
1245
1246                                         if (this_cat && this_cat.previousSibling) {
1247                                                 while (!e && this_cat.previousSibling) {
1248                                                         this_cat = this_cat.previousSibling;
1249                                                         if (this_cat.id == "feedCatHolder") {
1250                                                                 e = this_cat.firstChild.lastChild;
1251                                                         }
1252                                                 }
1253                                         }
1254
1255                                 } else {
1256                                         e = false;
1257                            }
1258
1259                                 if (e) {
1260                                         if (!unread_only || (unread_only && e.className != "feed" &&
1261                                                         e.className.match("feed")))     {
1262                                                 if (e.parentNode.parentNode && e.parentNode.parentNode.className
1263                                                         != "invisible") {
1264                                                         return e.id.replace("FEEDR-", "");
1265                                                 }
1266                                         }
1267                                 }
1268                         }
1269                 }
1270         }
1271 }
1272
1273 function showBlockElement(id, h_id) {
1274         var elem = document.getElementById(id);
1275
1276         if (elem) {
1277                 elem.style.display = "block";
1278
1279                 if (h_id) {
1280                         elem = document.getElementById(h_id);
1281                         if (elem) {
1282                                 elem.style.display = "none";
1283                         }
1284                 }
1285         } else {
1286                 alert("[showBlockElement] can't find element with id " + id);
1287         }
1288 }
1289
1290 function hideParentElement(e) {
1291         e.parentNode.style.display = "none";
1292 }
1293
1294 function dropboxSelect(e, v) {
1295         for (i = 0; i < e.length; i++) {
1296                 if (e[i].value == v) {
1297                         e.selectedIndex = i;
1298                         break;
1299                 }
1300         }
1301 }
1302
1303 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
1304 // bugfixed just a little bit :-)
1305 function getURLParam(strParamName){
1306   var strReturn = "";
1307   var strHref = window.location.href;
1308
1309   if (strHref.indexOf("#") == strHref.length-1) {
1310                 strHref = strHref.substring(0, strHref.length-1);
1311   }
1312
1313   if ( strHref.indexOf("?") > -1 ){
1314     var strQueryString = strHref.substr(strHref.indexOf("?"));
1315     var aQueryString = strQueryString.split("&");
1316     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
1317       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
1318         var aParam = aQueryString[iParam].split("=");
1319         strReturn = aParam[1];
1320         break;
1321       }
1322     }
1323   }
1324   return strReturn;
1325 }
1326
1327 function leading_zero(p) {
1328         var s = String(p);
1329         if (s.length == 1) s = "0" + s;
1330         return s;
1331 }
1332
1333 function closeInfoBox(cleanup) {
1334
1335         if (!is_msie() && !getInitParam("infobox_disable_overlay")) {
1336                 var overlay = document.getElementById("dialog_overlay");
1337                 if (overlay) {
1338                         overlay.style.display = "none";
1339                 }
1340         }
1341
1342         var box = document.getElementById('infoBox');
1343         var shadow = document.getElementById('infoBoxShadow');
1344
1345         if (shadow) {
1346                 shadow.style.display = "none";
1347         } else if (box) {
1348                 box.style.display = "none";
1349         }
1350
1351         if (cleanup) box.innerHTML = "&nbsp;";
1352
1353         enableHotkeys();
1354
1355         return false;
1356 }
1357
1358
1359 function displayDlg(id, param) {
1360
1361         if (!xmlhttp_ready(xmlhttp)) {
1362                 printLockingError();
1363                 return
1364         }
1365
1366         notify_progress("Loading, please wait...", true);
1367
1368         xmlhttp.open("GET", "backend.php?op=dlg&id=" +
1369                 param_escape(id) + "&param=" + param_escape(param), true);
1370         xmlhttp.onreadystatechange=infobox_callback;
1371         xmlhttp.send(null);
1372
1373         disableHotkeys();
1374
1375         return false;
1376 }
1377
1378 function infobox_submit_callback() {
1379         if (xmlhttp.readyState == 4) {
1380                 closeInfoBox();
1381
1382                 try {
1383                         // called from prefs, reload tab
1384                         if (active_tab) {
1385                                 selectTab(active_tab, false);
1386                         }
1387                 } catch (e) { }
1388
1389                 if (xmlhttp.responseText) {
1390                         notify_info(xmlhttp.responseText);
1391                 }
1392
1393         }
1394 }
1395
1396 function infobox_callback() {
1397         if (xmlhttp.readyState == 4) {
1398
1399                 if (!is_msie() && !getInitParam("infobox_disable_overlay")) {
1400                         var overlay = document.getElementById("dialog_overlay");
1401                         if (overlay) {
1402                                 overlay.style.display = "block";
1403                         }
1404                 }
1405
1406                 var box = document.getElementById('infoBox');
1407                 var shadow = document.getElementById('infoBoxShadow');
1408                 if (box) {
1409                         box.innerHTML=xmlhttp.responseText;
1410                         if (shadow) {
1411                                 shadow.style.display = "block";
1412                         } else {
1413                                 box.style.display = "block";
1414                         }
1415                 }
1416                 notify("");
1417         }
1418 }
1419
1420 function helpbox_callback() {
1421         if (xmlhttp.readyState == 4) {
1422                 var box = document.getElementById('helpBox');
1423                 var shadow = document.getElementById('helpBoxShadow');
1424                 if (box) {
1425                         box.innerHTML=xmlhttp.responseText;
1426                         if (shadow) {
1427                                 shadow.style.display = "block";
1428                         } else {
1429                                 box.style.display = "block";
1430                         }
1431                 }
1432                 notify("");
1433         }
1434 }
1435
1436 function addFilter() {
1437
1438         if (!xmlhttp_ready(xmlhttp)) {
1439                 printLockingError();
1440                 return
1441         }
1442
1443         var form = document.forms['filter_add_form'];
1444         var reg_exp = form.reg_exp.value;
1445
1446         if (reg_exp == "") {
1447                 alert("Can't add filter: nothing to match on.");
1448                 return false;
1449         }
1450
1451         var query = Form.serialize("filter_add_form");
1452
1453         xmlhttp.open("GET", "backend.php?" + query, true);
1454         xmlhttp.onreadystatechange=infobox_submit_callback;
1455         xmlhttp.send(null);
1456
1457         return true;
1458 }
1459
1460 function toggleSubmitNotEmpty(e, submit_id) {
1461         try {
1462                 document.getElementById(submit_id).disabled = (e.value == "")
1463         } catch (e) {
1464                 exception_error("toggleSubmitNotEmpty", e);
1465         }
1466 }
1467
1468 function isValidURL(s) {
1469         return s.match("http://") != null || s.match("https://") != null || s.match("feed://") != null;
1470 }
1471
1472 function qaddFeed() {
1473
1474         if (!xmlhttp_ready(xmlhttp)) {
1475                 printLockingError();
1476                 return
1477         }
1478
1479         var form = document.forms['feed_add_form'];
1480         var feed_url = form.feed_url.value;
1481
1482         if (feed_url == "") {
1483                 alert("Can't subscribe: no feed URL given.");
1484                 return false;
1485         }
1486
1487         notify_progress(__("Subscribing to feed..."), true);
1488
1489         closeInfoBox();
1490
1491         var feeds_doc = document;
1492
1493 //      feeds_doc.location.href = "backend.php?op=error&msg=Loading,%20please wait...";
1494
1495         var query = Form.serialize("feed_add_form");
1496
1497         debug("subscribe q: " + query);
1498
1499 /*      xmlhttp.open("GET", "backend.php?" + query, true);
1500         xmlhttp.onreadystatechange=dlg_frefresh_callback;
1501         xmlhttp.send(null); */
1502
1503         xmlhttp.open("POST", "backend.php", true);
1504         xmlhttp.onreadystatechange=dlg_frefresh_callback;
1505         xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
1506         xmlhttp.send(query);
1507
1508         return false;
1509 }
1510
1511 function filterCR(e, f)
1512 {
1513      var key;
1514
1515      if(window.event)
1516           key = window.event.keyCode;     //IE
1517      else
1518           key = e.which;     //firefox
1519
1520         if (key == 13) {
1521                 if (typeof f != 'undefined') {
1522                         f();
1523                         return false;
1524                 } else {
1525                         return false;
1526                 }
1527         } else {
1528                 return true;
1529         }
1530 }
1531
1532 function getMainContext() {
1533         return this.window;
1534 }
1535
1536 function getFeedsContext() {
1537         return this.window;
1538 }
1539
1540 function getContentContext() {
1541         return this.window;
1542 }
1543
1544 function getHeadlinesContext() {
1545         return this.window;
1546 }
1547
1548 var debug_last_class = "even";
1549
1550 function debug(msg) {
1551
1552         if (debug_last_class == "even") {
1553                 debug_last_class = "odd";
1554         } else {
1555                 debug_last_class = "even";
1556         }
1557
1558         var c = document.getElementById('debug_output');
1559         if (c && c.style.display == "block") {
1560                 while (c.lastChild != 'undefined' && c.childNodes.length > 100) {
1561                         c.removeChild(c.lastChild);
1562                 }
1563
1564                 var d = new Date();
1565                 var ts = leading_zero(d.getHours()) + ":" + leading_zero(d.getMinutes()) +
1566                         ":" + leading_zero(d.getSeconds());
1567                 c.innerHTML = "<li class=\"" + debug_last_class + "\"><span class=\"debugTS\">[" + ts + "]</span> " +
1568                         msg + "</li>" + c.innerHTML;
1569         }
1570 }
1571
1572 function getInitParam(key) {
1573         return init_params[key];
1574 }
1575
1576 function storeInitParam(key, value) {
1577         debug("<b>storeInitParam is OBSOLETE: " + key + " => " + value + "</b>");
1578         init_params[key] = value;
1579 }
1580
1581 function fatalError(code, message) {
1582         try {
1583
1584                 if (code == 6) {
1585                         window.location.href = "tt-rss.php";
1586                 } else if (code == 5) {
1587                         window.location.href = "update.php";
1588                 } else {
1589                         var fe = document.getElementById("fatal_error");
1590                         var fc = document.getElementById("fatal_error_msg");
1591
1592                         if (message == "") message = "Unknown error";
1593
1594                         fc.innerHTML = "<img src='images/sign_excl.png'> " + message + " (Code " + code + ")";
1595
1596                         fe.style.display = "block";
1597                 }
1598
1599         } catch (e) {
1600                 exception_error("fatalError", e);
1601         }
1602 }
1603
1604 function getFeedName(id, is_cat) {
1605         var d = getFeedsContext().document;
1606
1607         var e;
1608
1609         if (is_cat) {
1610                 e = d.getElementById("FCATN-" + id);
1611         } else {
1612                 e = d.getElementById("FEEDN-" + id);
1613         }
1614         if (e) {
1615                 return e.innerHTML.stripTags();
1616         } else {
1617                 return null;
1618         }
1619 }
1620
1621 function viewContentUrl(url) {
1622         getContentContext().location = url;
1623 }
1624
1625 function filterDlgCheckAction(sender) {
1626
1627         try {
1628
1629                 var action = sender[sender.selectedIndex].value;
1630
1631                 var form = document.forms["filter_add_form"];
1632
1633                 if (!form) {
1634                         form = document.forms["filter_edit_form"];
1635                 }
1636
1637                 if (!form) {
1638                         debug("filterDlgCheckAction: can't find form!");
1639                         return;
1640                 }
1641
1642                 var action_param = form.action_param;
1643
1644                 if (!action_param) {
1645                         debug("filterDlgCheckAction: can't find action param!");
1646                         return;
1647                 }
1648
1649                 // if selected action supports parameters, enable params field
1650                 if (action == 4) {
1651                         action_param.disabled = false;
1652                 } else {
1653                         action_param.disabled = true;
1654                 }
1655
1656         } catch (e) {
1657                 exception_error(e, "filterDlgCheckAction");
1658         }
1659
1660 }
1661
1662 function explainError(code) {
1663         return displayDlg("explainError", code);
1664 }
1665
1666 function logoutUser() {
1667         try {
1668                 if (xmlhttp_ready(xmlhttp_rpc)) {
1669
1670                         notify_progress("Logging out, please wait...", true);
1671
1672                         xmlhttp_rpc.open("GET", "backend.php?op=rpc&subop=logout", true);
1673                         xmlhttp_rpc.onreadystatechange=logout_callback;
1674                         xmlhttp_rpc.send(null);
1675                 } else {
1676                         printLockingError();
1677                 }
1678         } catch (e) {
1679                 exception_error("logoutUser", e);
1680         }
1681 }
1682
1683 // this only searches loaded headlines list, not in CDM
1684 function getRelativePostIds(id) {
1685
1686         debug("getRelativePostIds: " + id);
1687
1688         var ids = new Array();
1689         var container = document.getElementById("headlinesList");
1690
1691         if (container) {
1692                 var rows = container.rows;
1693
1694                 for (var i = 0; i < rows.length; i++) {
1695                         var r_id = rows[i].id.replace("RROW-", "");
1696
1697                         if (r_id == id) {
1698                                 if (i > 0) ids.push(rows[i-1].id.replace("RROW-", ""));
1699                                 if (i > 1) ids.push(rows[i-2].id.replace("RROW-", ""));
1700                                 if (i > 2) ids.push(rows[i-3].id.replace("RROW-", ""));
1701
1702                                 if (i < rows.length-1) ids.push(rows[i+1].id.replace("RROW-", ""));
1703                                 if (i < rows.length-2) ids.push(rows[i+2].id.replace("RROW-", ""));
1704                                 if (i < rows.length-3) ids.push(rows[i+3].id.replace("RROW-", ""));
1705
1706                                 return ids;
1707                         }
1708                 }
1709         }
1710
1711         return false;
1712 }