functions.js

   1 var hotkeys_enabled = true;
   2
   3 function browser_has_opacity() {
   4         return navigator.userAgent.match("Gecko") != null ||
   5                 navigator.userAgent.match("Opera") != null;
   6 }
   7
   8 function exception_error(location, e) {
   9         var msg;
  10
  11         if (e.fileName) {
  12                 var base_fname = e.fileName.substring(e.fileName.lastIndexOf("/") + 1);
  13
  14                 msg = "Exception: " + e.name + ", " + e.message +
  15                         "\nFunction: " + location + "()" +
  16                         "\nLocation: " + base_fname + ":" + e.lineNumber;
  17         } else {
  18                 msg = "Exception: " + e + "\nFunction: " + location + "()";
  19         }
  20
  21         alert(msg);
  22 }
  23
  24 function disableHotkeys() {
  25         hotkeys_enabled = false;
  26 }
  27
  28 function enableHotkeys() {
  29         hotkeys_enabled = true;
  30 }
  31
  32 function xmlhttp_ready(obj) {
  33         return obj.readyState == 4 || obj.readyState == 0 || !obj.readyState;
  34 }
  35
  36 function notify_callback() {
  37         var container = document.getElementById('notify');
  38         if (xmlhttp.readyState == 4) {
  39                 container.innerHTML=xmlhttp.responseText;
  40         }
  41 }
  42
  43 function rpc_notify_callback() {
  44         var container = document.getElementById('notify');
  45         if (xmlhttp_rpc.readyState == 4) {
  46                 container.innerHTML=xmlhttp_rpc.responseText;
  47         }
  48 }
  49
  50 function rpc_pnotify_callback() {
  51         var container = parent.document.getElementById('notify');
  52         if (xmlhttp_rpc.readyState == 4) {
  53                 container.innerHTML=xmlhttp_rpc.responseText;
  54         }
  55 }
  56
  57 function param_escape(arg) {
  58         if (typeof encodeURIComponent != 'undefined')
  59                 return encodeURIComponent(arg);
  60         else
  61                 return escape(arg);
  62 }
  63
  64 function param_unescape(arg) {
  65         if (typeof decodeURIComponent != 'undefined')
  66                 return decodeURIComponent(arg);
  67         else
  68                 return unescape(arg);
  69 }
  70
  71 function delay(gap) {
  72         var then,now;
  73         then=new Date().getTime();
  74         now=then;
  75         while((now-then)<gap) {
  76                 now=new Date().getTime();
  77         }
  78 }
  79
  80 var notify_hide_timerid = false;
  81 var notify_last_doc = false;
  82
  83 function hide_notify() {
  84         if (notify_last_doc) {
  85                 var n = notify_last_doc.getElementById("notify");
  86                 if (browser_has_opacity()) {
  87                         if (notify_opacity >= 0) {
  88                                 notify_opacity = notify_opacity - 0.1;
  89                                 n.style.opacity = notify_opacity;
  90                                 notify_hide_timerid = window.setTimeout("hide_notify()", 20);
  91                         } else {
  92                                 n.style.display = "none";
  93                                 n.style.opacity = 1;
  94                         }
  95                 } else {
  96                         n.style.display = "none";
  97                 }
  98         }
  99 }
 100
 101 function notify_real(msg, doc, no_hide, is_err) {
 102
 103         var n = doc.getElementById("notify");
 104         var nb = doc.getElementById("notify_body");
 105
 106         if (!n || !nb) return;
 107
 108         if (notify_hide_timerid) {
 109                 window.clearTimeout(notify_hide_timerid);
 110         }
 111
 112         notify_last_doc = doc;
 113         notify_opacity = 1;
 114
 115         if (msg == "") {
 116                 if (n.style.display == "block") {
 117                         notify_hide_timerid = window.setTimeout("hide_notify()", 0);
 118                 }
 119                 return;
 120         } else {
 121                 n.style.display = "block";
 122         }
 123
 124         if (is_err) {
 125                 n.style.backgroundColor = "#ffcccc";
 126                 n.style.color = "black";
 127                 n.style.borderColor = "#ff0000";
 128         } else {
 129                 n.style.backgroundColor = "#fff7d5";
 130                 n.style.borderColor = "#d7c47a";
 131                 n.style.color = "black";
 132         }
 133
 134         nb.innerHTML = msg;
 135
 136         if (!no_hide) {
 137                 notify_hide_timerid = window.setTimeout("hide_notify()", 3000);
 138         }
 139 }
 140
 141 function p_notify(msg, no_hide, is_err) {
 142         notify_real(msg, parent.document, no_hide, is_err);
 143 }
 144
 145 function notify(msg, no_hide, is_err) {
 146         notify_real(msg, document, no_hide, is_err);
 147 }
 148
 149 function printLockingError() {
 150         notify("Please wait until operation finishes");}
 151
 152 var seq = "";
 153
 154 function hotkey_handler(e) {
 155
 156         var keycode;
 157
 158         if (!hotkeys_enabled) return;
 159
 160         if (window.event) {
 161                 keycode = window.event.keyCode;
 162         } else if (e) {
 163                 keycode = e.which;
 164         }
 165
 166         if (keycode == 13 || keycode == 27) {
 167                 seq = "";
 168         } else {
 169                 seq = seq + "" + keycode;
 170         }
 171
 172         if (document.getElementById("piggie")) {
 173
 174                 if (seq.match("807371717369")) {
 175                         seq = "";
 176                         localPiggieFunction(true);
 177                 } else {
 178                         localPiggieFunction(false);
 179                 }
 180         }
 181
 182         if (typeof localHotkeyHandler != 'undefined') {
 183                 try {
 184                         localHotkeyHandler(keycode);
 185                 } catch (e) {
 186                         exception_error("hotkey_handler", e);
 187                 }
 188         }
 189
 190 }
 191
 192 function cleanSelectedList(element) {
 193         var content = document.getElementById(element);
 194
 195         if (!document.getElementById("feedCatHolder")) {
 196                 for (i = 0; i < content.childNodes.length; i++) {
 197                         var child = content.childNodes[i];
 198                         try {
 199                                 child.className = child.className.replace("Selected", "");
 200                         } catch (e) {
 201                                 //
 202                         }
 203                 }
 204         } else {
 205                 for (i = 0; i < content.childNodes.length; i++) {
 206                         var child = content.childNodes[i];
 207                         if (child.id == "feedCatHolder") {
 208                                 parent.debug(child.id);
 209                                 var fcat = child.lastChild;
 210                                 for (j = 0; j < fcat.childNodes.length; j++) {
 211                                         var feed = fcat.childNodes[j];
 212                                         feed.className = feed.className.replace("Selected", "");
 213                                 }
 214                         }
 215                 }
 216         }
 217 }
 218
 219
 220 function cleanSelected(element) {
 221         var content = document.getElementById(element);
 222
 223         for (i = 0; i < content.rows.length; i++) {
 224                 content.rows[i].className = content.rows[i].className.replace("Selected", "");
 225         }
 226 }
 227
 228 function getVisibleUnreadHeadlines() {
 229         var content = document.getElementById("headlinesList");
 230
 231         var rows = new Array();
 232
 233         for (i = 0; i < content.rows.length; i++) {
 234                 var row_id = content.rows[i].id.replace("RROW-", "");
 235                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 236                                 rows.push(row_id);
 237                 }
 238         }
 239         return rows;
 240 }
 241
 242 function getVisibleHeadlineIds() {
 243
 244         var content = document.getElementById("headlinesList");
 245
 246         var rows = new Array();
 247
 248         for (i = 0; i < content.rows.length; i++) {
 249                 var row_id = content.rows[i].id.replace("RROW-", "");
 250                 if (row_id.length > 0) {
 251                                 rows.push(row_id);
 252                 }
 253         }
 254         return rows;
 255 }
 256
 257 function getFirstVisibleHeadlineId() {
 258         var rows = getVisibleHeadlineIds();
 259         return rows[0];
 260 }
 261
 262 function getLastVisibleHeadlineId() {
 263         var rows = getVisibleHeadlineIds();
 264         return rows[rows.length-1];
 265 }
 266
 267 function markHeadline(id) {
 268         var row = document.getElementById("RROW-" + id);
 269         if (row) {
 270                 var is_active = false;
 271
 272                 if (row.className.match("Active")) {
 273                         is_active = true;
 274                 }
 275                 row.className = row.className.replace("Selected", "");
 276                 row.className = row.className.replace("Active", "");
 277                 row.className = row.className.replace("Insensitive", "");
 278
 279                 if (is_active) {
 280                         row.className = row.className = "Active";
 281                 }
 282
 283                 var check = document.getElementById("RCHK-" + id);
 284
 285                 if (check) {
 286                         check.checked = true;
 287                 }
 288
 289                 row.className = row.className + "Selected";
 290
 291         }
 292 }
 293
 294 function getFeedIds() {
 295         var content = document.getElementById("feedsList");
 296
 297         var rows = new Array();
 298
 299         for (i = 0; i < content.rows.length; i++) {
 300                 var id = content.rows[i].id.replace("FEEDR-", "");
 301                 if (id.length > 0) {
 302                         rows.push(id);
 303                 }
 304         }
 305
 306         return rows;
 307 }
 308
 309 function setCookie(name, value, lifetime, path, domain, secure) {
 310
 311         var d = false;
 312
 313         if (lifetime) {
 314                 d = new Date();
 315                 d.setTime(lifetime * 1000);
 316         }
 317
 318         int_setCookie(name, value, d, path, domain, secure);
 319
 320 }
 321
 322 function int_setCookie(name, value, expires, path, domain, secure) {
 323         document.cookie= name + "=" + escape(value) +
 324                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 325                 ((path) ? "; path=" + path : "") +
 326                 ((domain) ? "; domain=" + domain : "") +
 327                 ((secure) ? "; secure" : "");
 328 }
 329
 330 function delCookie(name, path, domain) {
 331         if (getCookie(name)) {
 332                 document.cookie = name + "=" +
 333                 ((path) ? ";path=" + path : "") +
 334                 ((domain) ? ";domain=" + domain : "" ) +
 335                 ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
 336         }
 337 }
 338
 339
 340 function getCookie(name) {
 341
 342         var dc = document.cookie;
 343         var prefix = name + "=";
 344         var begin = dc.indexOf("; " + prefix);
 345         if (begin == -1) {
 346             begin = dc.indexOf(prefix);
 347             if (begin != 0) return null;
 348         }
 349         else {
 350             begin += 2;
 351         }
 352         var end = document.cookie.indexOf(";", begin);
 353         if (end == -1) {
 354             end = dc.length;
 355         }
 356         return unescape(dc.substring(begin + prefix.length, end));
 357 }
 358
 359 function disableContainerChildren(id, disable, doc) {
 360
 361         if (!doc) doc = document;
 362
 363         var container = doc.getElementById(id);
 364
 365         for (var i = 0; i < container.childNodes.length; i++) {
 366                 var child = container.childNodes[i];
 367
 368                 try {
 369                         child.disabled = disable;
 370                 } catch (E) {
 371
 372                 }
 373
 374                 if (disable) {
 375                         if (child.className && child.className.match("button")) {
 376                                 child.className = "disabledButton";
 377                         }
 378                 } else {
 379                         if (child.className && child.className.match("disabledButton")) {
 380                                 child.className = "button";
 381                         }
 382                 }
 383         }
 384
 385 }
 386
 387 function gotoPreferences() {
 388         document.location.href = "prefs.php";
 389 }
 390
 391 function gotoMain() {
 392         document.location.href = "tt-rss.php";
 393 }
 394
 395 function gotoExportOpml() {
 396         document.location.href = "opml.php?op=Export";
 397 }
 398
 399 function getActiveFeedId() {
 400         return getCookie("ttrss_vf_actfeed");
 401 }
 402
 403 function setActiveFeedId(id) {
 404         return setCookie("ttrss_vf_actfeed", id);
 405 }
 406
 407 var xmlhttp_rpc = false;
 408
 409 /*@cc_on @*/
 410 /*@if (@_jscript_version >= 5)
 411 // JScript gives us Conditional compilation, we can cope with old IE versions.
 412 // and security blocked creation of the objects.
 413 try {
 414         xmlhttp_rpc = new ActiveXObject("Msxml2.XMLHTTP");
 415 } catch (e) {
 416         try {
 417                 xmlhttp_rpc = new ActiveXObject("Microsoft.XMLHTTP");
 418         } catch (E) {
 419                 xmlhttp_rpc = false;
 420         }
 421 }
 422 @end @*/
 423
 424 if (!xmlhttp_rpc && typeof XMLHttpRequest!='undefined') {
 425         xmlhttp_rpc = new XMLHttpRequest();
 426 }
 427
 428 function parse_counters(reply, f_document, title_obj, scheduled_call) {
 429         try {
 430                 for (var l = 0; l < reply.childNodes.length; l++) {
 431                         if (!reply.childNodes[l] ||
 432                                 typeof(reply.childNodes[l].getAttribute) == "undefined") {
 433                                 // where did this come from?
 434                                 continue;
 435                         }
 436
 437                         var id = reply.childNodes[l].getAttribute("id");
 438                         var t = reply.childNodes[l].getAttribute("type");
 439                         var ctr = reply.childNodes[l].getAttribute("counter");
 440                         var error = reply.childNodes[l].getAttribute("error");
 441                         var has_img = reply.childNodes[l].getAttribute("hi");
 442                         var updated = reply.childNodes[l].getAttribute("updated");
 443
 444                         if (id == "global-unread") {
 445                                 title_obj.global_unread = ctr;
 446                                 title_obj.updateTitle();
 447                                 continue;
 448                         }
 449
 450                         if (t == "category") {
 451                                 var catctr = f_document.getElementById("FCATCTR-" + id);
 452                                 if (catctr) {
 453                                         catctr.innerHTML = "(" + ctr + " unread)";
 454                                 }
 455                                 continue;
 456                         }
 457
 458                         var feedctr = f_document.getElementById("FEEDCTR-" + id);
 459                         var feedu = f_document.getElementById("FEEDU-" + id);
 460                         var feedr = f_document.getElementById("FEEDR-" + id);
 461                         var feed_img = f_document.getElementById("FIMG-" + id);
 462                         var feedlink = f_document.getElementById("FEEDL-" + id);
 463
 464                         if (updated && feedlink) {
 465                                 if (error) {
 466                                         feedlink.title = "Error: " + error + " (" + updated + ")";
 467                                 } else {
 468                                         feedlink.title = "Updated: " + updated;
 469                                 }
 470                         }
 471
 472                         if (feedctr && feedu && feedr) {
 473
 474                                 if (feedu.innerHTML != ctr && id == getActiveFeedId() && scheduled_call) {
 475                                         var hf = title_obj.parent.frames["headlines-frame"];
 476                                         hf.location.reload(true);
 477                                 }
 478
 479                                 feedu.innerHTML = ctr;
 480
 481                                 if (error) {
 482                                         feedr.className = feedr.className.replace("feed", "error");
 483                                 } else if (id > 0) {
 484                                         feedr.className = feedr.className.replace("error", "feed");
 485                                 }
 486
 487                                 if (ctr > 0) {
 488                                         feedctr.className = "odd";
 489                                         if (!feedr.className.match("Unread")) {
 490                                                 var is_selected = feedr.className.match("Selected");
 491
 492                                                 feedr.className = feedr.className.replace("Selected", "");
 493                                                 feedr.className = feedr.className.replace("Unread", "");
 494
 495                                                 feedr.className = feedr.className + "Unread";
 496
 497                                                 if (is_selected) {
 498                                                         feedr.className = feedr.className + "Selected";
 499                                                 }
 500
 501                                         }
 502                                 } else {
 503                                         feedctr.className = "invisible";
 504                                         feedr.className = feedr.className.replace("Unread", "");
 505                                 }
 506                         }
 507                 }
 508         } catch (e) {
 509                 exception_error("parse_counters", e);
 510         }
 511 }
 512
 513 // this one is called from feedlist context
 514 // thus title_obj passed to parse_counters is parent (e.g. main ttrss window)
 515
 516 function all_counters_callback() {
 517         if (xmlhttp_rpc.readyState == 4) {
 518                 try {
 519                         if (!xmlhttp_rpc.responseXML || !xmlhttp_rpc.responseXML.firstChild) {
 520                                 notify("[all_counters_callback] backend did not return valid XML");
 521                                 return;
 522                         }
 523
 524                         if (!parent.frames["feeds-frame"]) {
 525                                 notify("[all_counters_callback] no parent feeds-frame");
 526                                 return;
 527                         }
 528
 529                         var reply = xmlhttp_rpc.responseXML.firstChild;
 530                         var f_document = parent.frames["feeds-frame"].document;
 531
 532                         parse_counters(reply, f_document, parent);
 533
 534                 } catch (e) {
 535                         exception_error("all_counters_callback", e);
 536                 }
 537         }
 538 }
 539
 540 function update_all_counters(feed) {
 541         if (xmlhttp_ready(xmlhttp_rpc)) {
 542                 var query = "backend.php?op=rpc&subop=getAllCounters";
 543
 544                 if (feed > 0) {
 545                         query = query + "&aid=" + feed;
 546                 }
 547
 548                 xmlhttp_rpc.open("GET", query, true);
 549                 xmlhttp_rpc.onreadystatechange=all_counters_callback;
 550                 xmlhttp_rpc.send(null);
 551         }
 552 }
 553
 554 function popupHelp(tid) {
 555         var w = window.open("backend.php?op=help&tid=" + tid,
 556                 "Popup Help",
 557                 "menubar=no,location=no,resizable=yes,scrollbars=yes,status=no");
 558 }
 559
 560 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 561   * * @author Sundar Dorai-Raj
 562   * * Email: sdoraira@vt.edu
 563   * * This program is free software; you can redistribute it and/or
 564   * * modify it under the terms of the GNU General Public License
 565   * * as published by the Free Software Foundation; either version 2
 566   * * of the License, or (at your option) any later version,
 567   * * provided that any use properly credits the author.
 568   * * This program is distributed in the hope that it will be useful,
 569   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 570   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 571   * * GNU General Public License for more details at http://www.gnu.org * * */
 572
 573   var numbers=".0123456789";
 574   function isNumeric(x) {
 575     // is x a String or a character?
 576     if(x.length>1) {
 577       // remove negative sign
 578       x=Math.abs(x)+"";
 579       for(j=0;j<x.length;j++) {
 580         // call isNumeric recursively for each character
 581         number=isNumeric(x.substring(j,j+1));
 582         if(!number) return number;
 583       }
 584       return number;
 585     }
 586     else {
 587       // if x is number return true
 588       if(numbers.indexOf(x)>=0) return true;
 589       return false;
 590     }
 591   }
 592
 593
 594 function hideOrShowFeeds(doc, hide) {
 595
 596         if (!doc.styleSheets) return;
 597
 598         var css_rules = doc.styleSheets[0].cssRules;
 599
 600         if (!css_rules || !css_rules.length) return;
 601
 602         for (i = 0; i < css_rules.length; i++) {
 603                 var rule = css_rules[i];
 604
 605                 if (rule.selectorText == "ul.feedList li.feed") {
 606                         if (!hide) {
 607                                 rule.style.display = "block";
 608                         } else {
 609                                 rule.style.display = "none";
 610                         }
 611                 }
 612
 613         }
 614
 615 }
 616
 617 function selectTableRow(r, do_select) {
 618         r.className = r.className.replace("Selected", "");
 619
 620         if (do_select) {
 621                 r.className = r.className + "Selected";
 622         }
 623 }
 624
 625 function selectTableRowById(elem_id, check_id, do_select) {
 626
 627         try {
 628
 629                 var row = document.getElementById(elem_id);
 630
 631                 if (row) {
 632                         selectTableRow(row, do_select);
 633                 }
 634
 635                 var check = document.getElementById(check_id);
 636
 637                 if (check) {
 638                         check.checked = do_select;
 639                 }
 640         } catch (e) {
 641                 exception_error("selectTableRowById", e);
 642         }
 643 }
 644
 645 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
 646         classcheck, reset_others) {
 647
 648         var content = document.getElementById(content_id);
 649
 650         if (!content) {
 651                 alert("[selectTableRows] Element " + content_id + " not found.");
 652                 return;
 653         }
 654
 655         for (i = 0; i < content.rows.length; i++) {
 656                 if (!classcheck || content.rows[i].className.match(classcheck)) {
 657
 658                         if (content.rows[i].id.match(prefix)) {
 659                                 selectTableRow(content.rows[i], do_select);
 660
 661                                 var row_id = content.rows[i].id.replace(prefix, "");
 662                                 var check = document.getElementById(check_prefix + row_id);
 663
 664                                 if (check) {
 665                                         check.checked = do_select;
 666                                 }
 667                         } else if (reset_others) {
 668                                 selectTableRow(content.rows[i], false);
 669
 670                                 var row_id = content.rows[i].id.replace(prefix, "");
 671                                 var check = document.getElementById(check_prefix + row_id);
 672
 673                                 if (check) {
 674                                         check.checked = false;
 675                                 }
 676
 677                         }
 678                 } else if (reset_others) {
 679                         selectTableRow(content.rows[i], false);
 680
 681                         var row_id = content.rows[i].id.replace(prefix, "");
 682                         var check = document.getElementById(check_prefix + row_id);
 683
 684                         if (check) {
 685                                 check.checked = false;
 686                         }
 687
 688                 }
 689         }
 690 }
 691
 692 function getSelectedTableRowIds(content_id, prefix) {
 693
 694         var content = document.getElementById(content_id);
 695
 696         if (!content) {
 697                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
 698                 return;
 699         }
 700
 701         var sel_rows = new Array();
 702
 703         for (i = 0; i < content.rows.length; i++) {
 704                 if (content.rows[i].id.match(prefix) &&
 705                                 content.rows[i].className.match("Selected")) {
 706
 707                         var row_id = content.rows[i].id.replace(prefix + "-", "");
 708                         sel_rows.push(row_id);
 709                 }
 710         }
 711
 712         return sel_rows;
 713
 714 }
 715
 716 function toggleSelectRowById(sender, id) {
 717         var row = document.getElementById(id);
 718
 719         if (sender.checked) {
 720                 if (!row.className.match("Selected")) {
 721                         row.className = row.className + "Selected";
 722                 }
 723         } else {
 724                 if (row.className.match("Selected")) {
 725                         row.className = row.className.replace("Selected", "");
 726                 }
 727         }
 728 }
 729
 730 function toggleSelectListRow(sender) {
 731         var parent_row = sender.parentNode;
 732
 733         if (sender.checked) {
 734                 if (!parent_row.className.match("Selected")) {
 735                         parent_row.className = parent_row.className + "Selected";
 736                 }
 737         } else {
 738                 if (parent_row.className.match("Selected")) {
 739                         parent_row.className = parent_row.className.replace("Selected", "");
 740                 }
 741         }
 742 }
 743
 744
 745 function toggleSelectRow(sender) {
 746         var parent_row = sender.parentNode.parentNode;
 747
 748         if (sender.checked) {
 749                 if (!parent_row.className.match("Selected")) {
 750                         parent_row.className = parent_row.className + "Selected";
 751                 }
 752         } else {
 753                 if (parent_row.className.match("Selected")) {
 754                         parent_row.className = parent_row.className.replace("Selected", "");
 755                 }
 756         }
 757 }
 758
 759 function openExternalUrl(url) {
 760         var w = window.open(url);
 761 }
 762
 763 function getRelativeFeedId(list, id, direction, unread_only) {
 764         if (!id) {
 765                 if (direction == "next") {
 766                         for (i = 0; i < list.childNodes.length; i++) {
 767                                 var child = list.childNodes[i];
 768                                 if (child.id && child.id == "feedCatHolder") {
 769                                         if (child.lastChild) {
 770                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 771                                                 if (cr) return cr;
 772                                         }
 773                                 } else if (child.id && child.id.match("FEEDR-")) {
 774                                         return child.id.replace('FEEDR-', '');
 775                                 }
 776                         }
 777                 }
 778
 779                 // FIXME select last feed doesn't work when only unread feeds are visible
 780
 781                 if (direction == "prev") {
 782                         for (i = list.childNodes.length-1; i >= 0; i--) {
 783                                 var child = list.childNodes[i];
 784                                 if (child.id == "feedCatHolder") {
 785                                         if (child.firstChild) {
 786                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 787                                                 if (cr) return cr;
 788                                         }
 789                                 } else if (child.id.match("FEEDR-")) {
 790
 791                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 792                                                 if (child.className != "feed") {
 793                                                         alert(child.className);
 794                                                         return child.id.replace('FEEDR-', '');
 795                                                 }
 796                                         } else {
 797                                                         return child.id.replace('FEEDR-', '');
 798                                         }
 799                                 }
 800                         }
 801                 }
 802         } else {
 803
 804                 var feed = list.ownerDocument.getElementById("FEEDR-" + getActiveFeedId());
 805
 806                 if (getCookie("ttrss_vf_hreadf") == 1) {
 807                         unread_only = true;
 808                 }
 809
 810                 if (direction == "next") {
 811
 812                         var e = feed;
 813
 814                         while (e) {
 815
 816                                 if (e.nextSibling) {
 817
 818                                         e = e.nextSibling;
 819
 820                                 } else if (e.parentNode.parentNode.nextSibling) {
 821
 822                                         var this_cat = e.parentNode.parentNode;
 823
 824                                         e = false;
 825
 826                                         if (this_cat && this_cat.nextSibling) {
 827                                                 while (!e && this_cat.nextSibling) {
 828                                                         this_cat = this_cat.nextSibling;
 829                                                         if (this_cat.id == "feedCatHolder") {
 830                                                                 e = this_cat.firstChild.firstChild;
 831                                                         }
 832                                                 }
 833                                         }
 834
 835                                 } else {
 836                                         e = false;
 837                            }
 838
 839                                 if (e) {
 840                                         if (!unread_only || (unread_only && e.className != "feed" &&
 841                                                         e.className != "error"))        {
 842                                                 return e.id.replace("FEEDR-", "");
 843                                         }
 844                                 }
 845                         }
 846
 847                 } else if (direction == "prev") {
 848
 849                         var e = feed;
 850
 851                         while (e) {
 852
 853                                 if (e.previousSibling) {
 854
 855                                         e = e.previousSibling;
 856
 857                                 } else if (e.parentNode.parentNode.previousSibling) {
 858
 859                                         var this_cat = e.parentNode.parentNode;
 860
 861                                         e = false;
 862
 863                                         if (this_cat && this_cat.previousSibling) {
 864                                                 while (!e && this_cat.previousSibling) {
 865                                                         this_cat = this_cat.previousSibling;
 866                                                         if (this_cat.id == "feedCatHolder") {
 867                                                                 e = this_cat.firstChild.lastChild;
 868                                                         }
 869                                                 }
 870                                         }
 871
 872                                 } else {
 873                                         e = false;
 874                            }
 875
 876                                 if (e) {
 877                                         if (!unread_only || (unread_only && e.className != "feed" &&
 878                                                         e.className != "error"))        {
 879                                                 return e.id.replace("FEEDR-", "");
 880                                         }
 881                                 }
 882                         }
 883                 }
 884         }
 885 }
 886
 887 function showBlockElement(id) {
 888         var elem = document.getElementById(id);
 889
 890         if (elem) {
 891                 elem.style.display = "block";
 892         } else {
 893                 alert("[showBlockElement] can't find element with id " + id);
 894         }
 895 }
 896
 897 function hideParentElement(e) {
 898         e.parentNode.style.display = "none";
 899 }
 900
 901 function dropboxSelect(e, v) {
 902         for (i = 0; i < e.length; i++) {
 903                 if (e[i].value == v) {
 904                         e.selectedIndex = i;
 905                         break;
 906                 }
 907         }
 908 }
 909
 910 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
 911 // bugfixed just a little bit :-)
 912 function getURLParam(strParamName){
 913   var strReturn = "";
 914   var strHref = window.location.href;
 915
 916   if (strHref.indexOf("#") == strHref.length-1) {
 917                 strHref = strHref.substring(0, strHref.length-1);
 918   }
 919
 920   if ( strHref.indexOf("?") > -1 ){
 921     var strQueryString = strHref.substr(strHref.indexOf("?"));
 922     var aQueryString = strQueryString.split("&");
 923     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
 924       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
 925         var aParam = aQueryString[iParam].split("=");
 926         strReturn = aParam[1];
 927         break;
 928       }
 929     }
 930   }
 931   return strReturn;
 932 }
 933
 934 function leading_zero(p) {
 935         var s = String(p);
 936         if (s.length == 1) s = "0" + s;
 937         return s;
 938 }
 939
 940 function center_element(e) {
 941
 942         try {
 943                 var c_width = document.body.clientWidth;
 944                 var c_height = document.body.clientHeight;
 945
 946                 var c_scroll = document.body.scrollTop;
 947
 948                 var e_width = e.clientWidth;
 949                 var e_height = e.clientHeight;
 950
 951                 var set_y = (c_height / 2) + c_scroll - (e_height / 2);
 952                 var set_x = (c_width / 2) - (e_width / 2);
 953
 954                 e.style.top = set_y + "px";
 955                 e.style.left = set_x + "px";
 956         } catch (e) {
 957                 exception_error("center_element", e);
 958         }
 959 }
 960
 961 function closeInfoBox() {
 962         var box = document.getElementById('infoBox');
 963         var shadow = document.getElementById('infoBoxShadow');
 964
 965         if (shadow) {
 966                 shadow.style.display = "none";
 967         } else if (box) {
 968                 box.style.display = "none";
 969         }
 970
 971         enableHotkeys();
 972 }
 973
 974
 975 function displayDlg(id, param) {
 976
 977         if (!xmlhttp_ready(xmlhttp)) {
 978                 printLockingError();
 979                 return
 980         }
 981
 982         notify("");
 983
 984         xmlhttp.open("GET", "backend.php?op=dlg&id=" +
 985                 param_escape(id) + "&param=" + param_escape(param), true);
 986         xmlhttp.onreadystatechange=infobox_callback;
 987         xmlhttp.send(null);
 988
 989         disableHotkeys();
 990
 991 }
 992
 993 function infobox_submit_callback() {
 994         if (xmlhttp.readyState == 4) {
 995                 notify(xmlhttp.responseText);
 996                 closeInfoBox();
 997
 998                 // called from prefs, reload tab
 999                 if (active_tab) {
1000                         selectTab(active_tab, false);
1001                 }
1002         }
1003 }
1004
1005 function infobox_callback() {
1006         if (xmlhttp.readyState == 4) {
1007                 var box = document.getElementById('infoBox');
1008                 var shadow = document.getElementById('infoBoxShadow');
1009                 if (box) {
1010                         box.innerHTML=xmlhttp.responseText;
1011                         if (shadow) {
1012                                 shadow.style.display = "block";
1013                         } else {
1014                                 box.style.display = "block";
1015                         }
1016                 }
1017         }
1018 }
1019
1020 function qaddFilter() {
1021
1022         if (!xmlhttp_ready(xmlhttp)) {
1023                 printLockingError();
1024                 return
1025         }
1026
1027         var regexp = document.getElementById("fadd_regexp");
1028         var match = document.getElementById("fadd_match");
1029         var feed = document.getElementById("fadd_feed");
1030         var action = document.getElementById("fadd_action");
1031
1032         if (regexp.value.length == 0) {
1033                 alert("Missing filter expression.");
1034         } else {
1035                 notify("Adding filter...");
1036
1037                 var v_match = match[match.selectedIndex].text;
1038                 var feed_id = feed[feed.selectedIndex].id;
1039                 var action_id = action[action.selectedIndex].id;
1040
1041                 xmlhttp.open("GET", "backend.php?op=pref-filters&quiet=1&subop=add&regexp=" +
1042                         param_escape(regexp.value) + "&match=" + v_match +
1043                         "&fid=" + param_escape(feed_id) + "&aid=" + param_escape(action_id), true);
1044
1045                 xmlhttp.onreadystatechange=infobox_submit_callback;
1046                 xmlhttp.send(null);
1047
1048                 regexp.value = "";
1049         }
1050
1051 }
1052
1053 function toggleSubmitNotEmpty(e, submit_id) {
1054         try {
1055                 document.getElementById(submit_id).disabled = (e.value == "")
1056         } catch (e) {
1057                 exception_error("toggleSubmitNotEmpty", e);
1058         }
1059 }
1060
1061 function isValidURL(s) {
1062         return s.match("http://") != null || s.match("https://") != null;
1063 }