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 = Ajax.getTransport();
 408
 409 function parse_counters(reply, f_document, title_obj, scheduled_call) {
 410         try {
 411                 for (var l = 0; l < reply.childNodes.length; l++) {
 412                         if (!reply.childNodes[l] ||
 413                                 typeof(reply.childNodes[l].getAttribute) == "undefined") {
 414                                 // where did this come from?
 415                                 continue;
 416                         }
 417
 418                         var id = reply.childNodes[l].getAttribute("id");
 419                         var t = reply.childNodes[l].getAttribute("type");
 420                         var ctr = reply.childNodes[l].getAttribute("counter");
 421                         var error = reply.childNodes[l].getAttribute("error");
 422                         var has_img = reply.childNodes[l].getAttribute("hi");
 423                         var updated = reply.childNodes[l].getAttribute("updated");
 424
 425                         if (id == "global-unread") {
 426                                 title_obj.global_unread = ctr;
 427                                 title_obj.updateTitle();
 428                                 continue;
 429                         }
 430
 431                         if (t == "category") {
 432                                 var catctr = f_document.getElementById("FCATCTR-" + id);
 433                                 if (catctr) {
 434                                         catctr.innerHTML = "(" + ctr + " unread)";
 435                                 }
 436                                 continue;
 437                         }
 438
 439                         var feedctr = f_document.getElementById("FEEDCTR-" + id);
 440                         var feedu = f_document.getElementById("FEEDU-" + id);
 441                         var feedr = f_document.getElementById("FEEDR-" + id);
 442                         var feed_img = f_document.getElementById("FIMG-" + id);
 443                         var feedlink = f_document.getElementById("FEEDL-" + id);
 444
 445                         if (updated && feedlink) {
 446                                 if (error) {
 447                                         feedlink.title = "Error: " + error + " (" + updated + ")";
 448                                 } else {
 449                                         feedlink.title = "Updated: " + updated;
 450                                 }
 451                         }
 452
 453                         if (feedctr && feedu && feedr) {
 454
 455                                 if (feedu.innerHTML != ctr && id == getActiveFeedId() && scheduled_call) {
 456                                         var hf = title_obj.parent.frames["headlines-frame"];
 457                                         hf.location.reload(true);
 458                                 }
 459
 460                                 feedu.innerHTML = ctr;
 461
 462                                 if (error) {
 463                                         feedr.className = feedr.className.replace("feed", "error");
 464                                 } else if (id > 0) {
 465                                         feedr.className = feedr.className.replace("error", "feed");
 466                                 }
 467
 468                                 if (ctr > 0) {
 469                                         feedctr.className = "odd";
 470                                         if (!feedr.className.match("Unread")) {
 471                                                 var is_selected = feedr.className.match("Selected");
 472
 473                                                 feedr.className = feedr.className.replace("Selected", "");
 474                                                 feedr.className = feedr.className.replace("Unread", "");
 475
 476                                                 feedr.className = feedr.className + "Unread";
 477
 478                                                 if (is_selected) {
 479                                                         feedr.className = feedr.className + "Selected";
 480                                                 }
 481
 482                                         }
 483                                 } else {
 484                                         feedctr.className = "invisible";
 485                                         feedr.className = feedr.className.replace("Unread", "");
 486                                 }
 487                         }
 488                 }
 489         } catch (e) {
 490                 exception_error("parse_counters", e);
 491         }
 492 }
 493
 494 // this one is called from feedlist context
 495 // thus title_obj passed to parse_counters is parent (e.g. main ttrss window)
 496
 497 function all_counters_callback() {
 498         if (xmlhttp_rpc.readyState == 4) {
 499                 try {
 500                         if (!xmlhttp_rpc.responseXML || !xmlhttp_rpc.responseXML.firstChild) {
 501                                 notify("[all_counters_callback] backend did not return valid XML");
 502                                 return;
 503                         }
 504
 505                         if (!parent.frames["feeds-frame"]) {
 506                                 notify("[all_counters_callback] no parent feeds-frame");
 507                                 return;
 508                         }
 509
 510                         var reply = xmlhttp_rpc.responseXML.firstChild;
 511                         var f_document = parent.frames["feeds-frame"].document;
 512
 513                         parse_counters(reply, f_document, parent);
 514
 515                 } catch (e) {
 516                         exception_error("all_counters_callback", e);
 517                 }
 518         }
 519 }
 520
 521 function update_all_counters(feed) {
 522         if (xmlhttp_ready(xmlhttp_rpc)) {
 523                 var query = "backend.php?op=rpc&subop=getAllCounters";
 524
 525                 if (feed > 0) {
 526                         query = query + "&aid=" + feed;
 527                 }
 528
 529                 xmlhttp_rpc.open("GET", query, true);
 530                 xmlhttp_rpc.onreadystatechange=all_counters_callback;
 531                 xmlhttp_rpc.send(null);
 532         }
 533 }
 534
 535 function popupHelp(tid) {
 536         var w = window.open("backend.php?op=help&tid=" + tid,
 537                 "Popup Help",
 538                 "menubar=no,location=no,resizable=yes,scrollbars=yes,status=no");
 539 }
 540
 541 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 542   * * @author Sundar Dorai-Raj
 543   * * Email: sdoraira@vt.edu
 544   * * This program is free software; you can redistribute it and/or
 545   * * modify it under the terms of the GNU General Public License
 546   * * as published by the Free Software Foundation; either version 2
 547   * * of the License, or (at your option) any later version,
 548   * * provided that any use properly credits the author.
 549   * * This program is distributed in the hope that it will be useful,
 550   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 551   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 552   * * GNU General Public License for more details at http://www.gnu.org * * */
 553
 554   var numbers=".0123456789";
 555   function isNumeric(x) {
 556     // is x a String or a character?
 557     if(x.length>1) {
 558       // remove negative sign
 559       x=Math.abs(x)+"";
 560       for(j=0;j<x.length;j++) {
 561         // call isNumeric recursively for each character
 562         number=isNumeric(x.substring(j,j+1));
 563         if(!number) return number;
 564       }
 565       return number;
 566     }
 567     else {
 568       // if x is number return true
 569       if(numbers.indexOf(x)>=0) return true;
 570       return false;
 571     }
 572   }
 573
 574
 575 function hideOrShowFeeds(doc, hide) {
 576
 577         if (!doc.styleSheets) return;
 578
 579         var css_rules = doc.styleSheets[0].cssRules;
 580
 581         if (!css_rules || !css_rules.length) return;
 582
 583         for (i = 0; i < css_rules.length; i++) {
 584                 var rule = css_rules[i];
 585
 586                 if (rule.selectorText == "ul.feedList li.feed") {
 587                         if (!hide) {
 588                                 rule.style.display = "block";
 589                         } else {
 590                                 rule.style.display = "none";
 591                         }
 592                 }
 593
 594         }
 595
 596 }
 597
 598 function selectTableRow(r, do_select) {
 599         r.className = r.className.replace("Selected", "");
 600
 601         if (do_select) {
 602                 r.className = r.className + "Selected";
 603         }
 604 }
 605
 606 function selectTableRowById(elem_id, check_id, do_select) {
 607
 608         try {
 609
 610                 var row = document.getElementById(elem_id);
 611
 612                 if (row) {
 613                         selectTableRow(row, do_select);
 614                 }
 615
 616                 var check = document.getElementById(check_id);
 617
 618                 if (check) {
 619                         check.checked = do_select;
 620                 }
 621         } catch (e) {
 622                 exception_error("selectTableRowById", e);
 623         }
 624 }
 625
 626 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
 627         classcheck, reset_others) {
 628
 629         var content = document.getElementById(content_id);
 630
 631         if (!content) {
 632                 alert("[selectTableRows] Element " + content_id + " not found.");
 633                 return;
 634         }
 635
 636         for (i = 0; i < content.rows.length; i++) {
 637                 if (!classcheck || content.rows[i].className.match(classcheck)) {
 638
 639                         if (content.rows[i].id.match(prefix)) {
 640                                 selectTableRow(content.rows[i], do_select);
 641
 642                                 var row_id = content.rows[i].id.replace(prefix, "");
 643                                 var check = document.getElementById(check_prefix + row_id);
 644
 645                                 if (check) {
 646                                         check.checked = do_select;
 647                                 }
 648                         } else if (reset_others) {
 649                                 selectTableRow(content.rows[i], false);
 650
 651                                 var row_id = content.rows[i].id.replace(prefix, "");
 652                                 var check = document.getElementById(check_prefix + row_id);
 653
 654                                 if (check) {
 655                                         check.checked = false;
 656                                 }
 657
 658                         }
 659                 } else if (reset_others) {
 660                         selectTableRow(content.rows[i], false);
 661
 662                         var row_id = content.rows[i].id.replace(prefix, "");
 663                         var check = document.getElementById(check_prefix + row_id);
 664
 665                         if (check) {
 666                                 check.checked = false;
 667                         }
 668
 669                 }
 670         }
 671 }
 672
 673 function getSelectedTableRowIds(content_id, prefix) {
 674
 675         var content = document.getElementById(content_id);
 676
 677         if (!content) {
 678                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
 679                 return;
 680         }
 681
 682         var sel_rows = new Array();
 683
 684         for (i = 0; i < content.rows.length; i++) {
 685                 if (content.rows[i].id.match(prefix) &&
 686                                 content.rows[i].className.match("Selected")) {
 687
 688                         var row_id = content.rows[i].id.replace(prefix + "-", "");
 689                         sel_rows.push(row_id);
 690                 }
 691         }
 692
 693         return sel_rows;
 694
 695 }
 696
 697 function toggleSelectRowById(sender, id) {
 698         var row = document.getElementById(id);
 699
 700         if (sender.checked) {
 701                 if (!row.className.match("Selected")) {
 702                         row.className = row.className + "Selected";
 703                 }
 704         } else {
 705                 if (row.className.match("Selected")) {
 706                         row.className = row.className.replace("Selected", "");
 707                 }
 708         }
 709 }
 710
 711 function toggleSelectListRow(sender) {
 712         var parent_row = sender.parentNode;
 713
 714         if (sender.checked) {
 715                 if (!parent_row.className.match("Selected")) {
 716                         parent_row.className = parent_row.className + "Selected";
 717                 }
 718         } else {
 719                 if (parent_row.className.match("Selected")) {
 720                         parent_row.className = parent_row.className.replace("Selected", "");
 721                 }
 722         }
 723 }
 724
 725
 726 function toggleSelectRow(sender) {
 727         var parent_row = sender.parentNode.parentNode;
 728
 729         if (sender.checked) {
 730                 if (!parent_row.className.match("Selected")) {
 731                         parent_row.className = parent_row.className + "Selected";
 732                 }
 733         } else {
 734                 if (parent_row.className.match("Selected")) {
 735                         parent_row.className = parent_row.className.replace("Selected", "");
 736                 }
 737         }
 738 }
 739
 740 function openExternalUrl(url) {
 741         var w = window.open(url);
 742 }
 743
 744 function getRelativeFeedId(list, id, direction, unread_only) {
 745         if (!id) {
 746                 if (direction == "next") {
 747                         for (i = 0; i < list.childNodes.length; i++) {
 748                                 var child = list.childNodes[i];
 749                                 if (child.id && child.id == "feedCatHolder") {
 750                                         if (child.lastChild) {
 751                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 752                                                 if (cr) return cr;
 753                                         }
 754                                 } else if (child.id && child.id.match("FEEDR-")) {
 755                                         return child.id.replace('FEEDR-', '');
 756                                 }
 757                         }
 758                 }
 759
 760                 // FIXME select last feed doesn't work when only unread feeds are visible
 761
 762                 if (direction == "prev") {
 763                         for (i = list.childNodes.length-1; i >= 0; i--) {
 764                                 var child = list.childNodes[i];
 765                                 if (child.id == "feedCatHolder") {
 766                                         if (child.firstChild) {
 767                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 768                                                 if (cr) return cr;
 769                                         }
 770                                 } else if (child.id.match("FEEDR-")) {
 771
 772                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 773                                                 if (child.className != "feed") {
 774                                                         alert(child.className);
 775                                                         return child.id.replace('FEEDR-', '');
 776                                                 }
 777                                         } else {
 778                                                         return child.id.replace('FEEDR-', '');
 779                                         }
 780                                 }
 781                         }
 782                 }
 783         } else {
 784
 785                 var feed = list.ownerDocument.getElementById("FEEDR-" + getActiveFeedId());
 786
 787                 if (getCookie("ttrss_vf_hreadf") == 1) {
 788                         unread_only = true;
 789                 }
 790
 791                 if (direction == "next") {
 792
 793                         var e = feed;
 794
 795                         while (e) {
 796
 797                                 if (e.nextSibling) {
 798
 799                                         e = e.nextSibling;
 800
 801                                 } else if (e.parentNode.parentNode.nextSibling) {
 802
 803                                         var this_cat = e.parentNode.parentNode;
 804
 805                                         e = false;
 806
 807                                         if (this_cat && this_cat.nextSibling) {
 808                                                 while (!e && this_cat.nextSibling) {
 809                                                         this_cat = this_cat.nextSibling;
 810                                                         if (this_cat.id == "feedCatHolder") {
 811                                                                 e = this_cat.firstChild.firstChild;
 812                                                         }
 813                                                 }
 814                                         }
 815
 816                                 } else {
 817                                         e = false;
 818                            }
 819
 820                                 if (e) {
 821                                         if (!unread_only || (unread_only && e.className != "feed" &&
 822                                                         e.className != "error"))        {
 823                                                 return e.id.replace("FEEDR-", "");
 824                                         }
 825                                 }
 826                         }
 827
 828                 } else if (direction == "prev") {
 829
 830                         var e = feed;
 831
 832                         while (e) {
 833
 834                                 if (e.previousSibling) {
 835
 836                                         e = e.previousSibling;
 837
 838                                 } else if (e.parentNode.parentNode.previousSibling) {
 839
 840                                         var this_cat = e.parentNode.parentNode;
 841
 842                                         e = false;
 843
 844                                         if (this_cat && this_cat.previousSibling) {
 845                                                 while (!e && this_cat.previousSibling) {
 846                                                         this_cat = this_cat.previousSibling;
 847                                                         if (this_cat.id == "feedCatHolder") {
 848                                                                 e = this_cat.firstChild.lastChild;
 849                                                         }
 850                                                 }
 851                                         }
 852
 853                                 } else {
 854                                         e = false;
 855                            }
 856
 857                                 if (e) {
 858                                         if (!unread_only || (unread_only && e.className != "feed" &&
 859                                                         e.className != "error"))        {
 860                                                 return e.id.replace("FEEDR-", "");
 861                                         }
 862                                 }
 863                         }
 864                 }
 865         }
 866 }
 867
 868 function showBlockElement(id) {
 869         var elem = document.getElementById(id);
 870
 871         if (elem) {
 872                 elem.style.display = "block";
 873         } else {
 874                 alert("[showBlockElement] can't find element with id " + id);
 875         }
 876 }
 877
 878 function hideParentElement(e) {
 879         e.parentNode.style.display = "none";
 880 }
 881
 882 function dropboxSelect(e, v) {
 883         for (i = 0; i < e.length; i++) {
 884                 if (e[i].value == v) {
 885                         e.selectedIndex = i;
 886                         break;
 887                 }
 888         }
 889 }
 890
 891 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
 892 // bugfixed just a little bit :-)
 893 function getURLParam(strParamName){
 894   var strReturn = "";
 895   var strHref = window.location.href;
 896
 897   if (strHref.indexOf("#") == strHref.length-1) {
 898                 strHref = strHref.substring(0, strHref.length-1);
 899   }
 900
 901   if ( strHref.indexOf("?") > -1 ){
 902     var strQueryString = strHref.substr(strHref.indexOf("?"));
 903     var aQueryString = strQueryString.split("&");
 904     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
 905       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
 906         var aParam = aQueryString[iParam].split("=");
 907         strReturn = aParam[1];
 908         break;
 909       }
 910     }
 911   }
 912   return strReturn;
 913 }
 914
 915 function leading_zero(p) {
 916         var s = String(p);
 917         if (s.length == 1) s = "0" + s;
 918         return s;
 919 }
 920
 921 function closeInfoBox() {
 922         var box = document.getElementById('infoBox');
 923         var shadow = document.getElementById('infoBoxShadow');
 924
 925         if (shadow) {
 926                 shadow.style.display = "none";
 927         } else if (box) {
 928                 box.style.display = "none";
 929         }
 930
 931         enableHotkeys();
 932
 933 }
 934
 935
 936 function displayDlg(id, param) {
 937
 938         if (!xmlhttp_ready(xmlhttp)) {
 939                 printLockingError();
 940                 return
 941         }
 942
 943         notify("");
 944
 945         xmlhttp.open("GET", "backend.php?op=dlg&id=" +
 946                 param_escape(id) + "&param=" + param_escape(param), true);
 947         xmlhttp.onreadystatechange=infobox_callback;
 948         xmlhttp.send(null);
 949
 950         disableHotkeys();
 951
 952 }
 953
 954 function infobox_submit_callback() {
 955         if (xmlhttp.readyState == 4) {
 956                 closeInfoBox();
 957
 958                 // called from prefs, reload tab
 959                 if (active_tab) {
 960                         selectTab(active_tab, false);
 961                 }
 962
 963                 notify(xmlhttp.responseText);
 964
 965         }
 966 }
 967
 968 function infobox_callback() {
 969         if (xmlhttp.readyState == 4) {
 970                 var box = document.getElementById('infoBox');
 971                 var shadow = document.getElementById('infoBoxShadow');
 972                 if (box) {
 973                         box.innerHTML=xmlhttp.responseText;
 974                         if (shadow) {
 975                                 shadow.style.display = "block";
 976                         } else {
 977                                 box.style.display = "block";
 978                         }
 979                 }
 980         }
 981 }
 982
 983 function qaddFilter() {
 984
 985         if (!xmlhttp_ready(xmlhttp)) {
 986                 printLockingError();
 987                 return
 988         }
 989
 990         var query = Form.serialize("filter_add_form");
 991
 992         xmlhttp.open("GET", "backend.php?" + query, true);
 993         xmlhttp.onreadystatechange=infobox_submit_callback;
 994         xmlhttp.send(null);
 995
 996         return true;
 997 }
 998
 999 function toggleSubmitNotEmpty(e, submit_id) {
1000         try {
1001                 document.getElementById(submit_id).disabled = (e.value == "")
1002         } catch (e) {
1003                 exception_error("toggleSubmitNotEmpty", e);
1004         }
1005 }
1006
1007 function isValidURL(s) {
1008         return s.match("http://") != null || s.match("https://") != null;
1009 }