functions.js

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