functions.js

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