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 param_escape(arg) {
  51         if (typeof encodeURIComponent != 'undefined')
  52                 return encodeURIComponent(arg);
  53         else
  54                 return escape(arg);
  55 }
  56
  57 function param_unescape(arg) {
  58         if (typeof decodeURIComponent != 'undefined')
  59                 return decodeURIComponent(arg);
  60         else
  61                 return unescape(arg);
  62 }
  63
  64 function delay(gap) {
  65         var then,now;
  66         then=new Date().getTime();
  67         now=then;
  68         while((now-then)<gap) {
  69                 now=new Date().getTime();
  70         }
  71 }
  72
  73 var notify_hide_timerid = false;
  74 var notify_last_doc = false;
  75
  76 var notify_effect = false;
  77
  78 function hide_notify() {
  79         if (notify_last_doc) {
  80                 var n = notify_last_doc.getElementById("notify");
  81                 if (browser_has_opacity()) {
  82                         if (notify_opacity >= 0) {
  83                                 notify_opacity = notify_opacity - 0.1;
  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, is_err) {
  97
  98         var n = doc.getElementById("notify");
  99         var nb = doc.getElementById("notify_body");
 100
 101         if (!n || !nb) return;
 102
 103         if (notify_hide_timerid) {
 104                 window.clearTimeout(notify_hide_timerid);
 105         }
 106
 107         notify_last_doc = doc;
 108         notify_opacity = 1;
 109
 110         if (msg == "") {
 111                 if (n.style.display == "block") {
 112                         notify_hide_timerid = window.setTimeout("hide_notify()", 0);
 113                 }
 114                 return;
 115         } else {
 116                 n.style.display = "block";
 117         }
 118
 119         if (is_err) {
 120                 n.style.backgroundColor = "#ffcccc";
 121                 n.style.color = "black";
 122                 n.style.borderColor = "#ff0000";
 123         } else {
 124                 n.style.backgroundColor = "#fff7d5";
 125                 n.style.borderColor = "#d7c47a";
 126                 n.style.color = "black";
 127         }
 128
 129         nb.innerHTML = msg;
 130
 131         if (!no_hide) {
 132                 notify_hide_timerid = window.setTimeout("hide_notify()", 3000);
 133         }
 134 }
 135
 136 function p_notify(msg, no_hide, is_err) {
 137         notify_real(msg, parent.document, no_hide, is_err);
 138 }
 139
 140 function notify(msg, no_hide, is_err) {
 141         notify_real(msg, document, no_hide, is_err);
 142 }
 143
 144 function printLockingError() {
 145         notify("Please wait until operation finishes");}
 146
 147 var seq = "";
 148
 149 function hotkey_handler(e) {
 150
 151         var keycode;
 152
 153         if (!hotkeys_enabled) return;
 154
 155         if (window.event) {
 156                 keycode = window.event.keyCode;
 157         } else if (e) {
 158                 keycode = e.which;
 159         }
 160
 161         if (keycode == 13 || keycode == 27) {
 162                 seq = "";
 163         } else {
 164                 seq = seq + "" + keycode;
 165         }
 166
 167         if (document.getElementById("piggie")) {
 168
 169                 if (seq.match("807371717369")) {
 170                         seq = "";
 171                         localPiggieFunction(true);
 172                 } else {
 173                         localPiggieFunction(false);
 174                 }
 175         }
 176
 177         if (typeof localHotkeyHandler != 'undefined') {
 178                 try {
 179                         localHotkeyHandler(keycode);
 180                 } catch (e) {
 181                         exception_error("hotkey_handler", e);
 182                 }
 183         }
 184
 185 }
 186
 187 function cleanSelectedList(element) {
 188         var content = document.getElementById(element);
 189
 190         if (!document.getElementById("feedCatHolder")) {
 191                 for (i = 0; i < content.childNodes.length; i++) {
 192                         var child = content.childNodes[i];
 193                         try {
 194                                 child.className = child.className.replace("Selected", "");
 195                         } catch (e) {
 196                                 //
 197                         }
 198                 }
 199         } else {
 200                 for (i = 0; i < content.childNodes.length; i++) {
 201                         var child = content.childNodes[i];
 202                         if (child.id == "feedCatHolder") {
 203                                 parent.debug(child.id);
 204                                 var fcat = child.lastChild;
 205                                 for (j = 0; j < fcat.childNodes.length; j++) {
 206                                         var feed = fcat.childNodes[j];
 207                                         feed.className = feed.className.replace("Selected", "");
 208                                 }
 209                         }
 210                 }
 211         }
 212 }
 213
 214
 215 function cleanSelected(element) {
 216         var content = document.getElementById(element);
 217
 218         for (i = 0; i < content.rows.length; i++) {
 219                 content.rows[i].className = content.rows[i].className.replace("Selected", "");
 220         }
 221 }
 222
 223 function getVisibleUnreadHeadlines() {
 224         var content = document.getElementById("headlinesList");
 225
 226         var rows = new Array();
 227
 228         for (i = 0; i < content.rows.length; i++) {
 229                 var row_id = content.rows[i].id.replace("RROW-", "");
 230                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 231                                 rows.push(row_id);
 232                 }
 233         }
 234         return rows;
 235 }
 236
 237 function getVisibleHeadlineIds() {
 238
 239         var content = document.getElementById("headlinesList");
 240
 241         var rows = new Array();
 242
 243         for (i = 0; i < content.rows.length; i++) {
 244                 var row_id = content.rows[i].id.replace("RROW-", "");
 245                 if (row_id.length > 0) {
 246                                 rows.push(row_id);
 247                 }
 248         }
 249         return rows;
 250 }
 251
 252 function getFirstVisibleHeadlineId() {
 253         var rows = getVisibleHeadlineIds();
 254         return rows[0];
 255 }
 256
 257 function getLastVisibleHeadlineId() {
 258         var rows = getVisibleHeadlineIds();
 259         return rows[rows.length-1];
 260 }
 261
 262 function markHeadline(id) {
 263         var row = document.getElementById("RROW-" + id);
 264         if (row) {
 265                 var is_active = false;
 266
 267                 if (row.className.match("Active")) {
 268                         is_active = true;
 269                 }
 270                 row.className = row.className.replace("Selected", "");
 271                 row.className = row.className.replace("Active", "");
 272                 row.className = row.className.replace("Insensitive", "");
 273
 274                 if (is_active) {
 275                         row.className = row.className = "Active";
 276                 }
 277
 278                 var check = document.getElementById("RCHK-" + id);
 279
 280                 if (check) {
 281                         check.checked = true;
 282                 }
 283
 284                 row.className = row.className + "Selected";
 285
 286         }
 287 }
 288
 289 function getFeedIds() {
 290         var content = document.getElementById("feedsList");
 291
 292         var rows = new Array();
 293
 294         for (i = 0; i < content.rows.length; i++) {
 295                 var id = content.rows[i].id.replace("FEEDR-", "");
 296                 if (id.length > 0) {
 297                         rows.push(id);
 298                 }
 299         }
 300
 301         return rows;
 302 }
 303
 304 function setCookie(name, value, lifetime, path, domain, secure) {
 305
 306         var d = false;
 307
 308         if (lifetime) {
 309                 d = new Date();
 310                 d.setTime(lifetime * 1000);
 311         }
 312
 313         int_setCookie(name, value, d, path, domain, secure);
 314
 315 }
 316
 317 function int_setCookie(name, value, expires, path, domain, secure) {
 318         document.cookie= name + "=" + escape(value) +
 319                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 320                 ((path) ? "; path=" + path : "") +
 321                 ((domain) ? "; domain=" + domain : "") +
 322                 ((secure) ? "; secure" : "");
 323 }
 324
 325 function delCookie(name, path, domain) {
 326         if (getCookie(name)) {
 327                 document.cookie = name + "=" +
 328                 ((path) ? ";path=" + path : "") +
 329                 ((domain) ? ";domain=" + domain : "" ) +
 330                 ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
 331         }
 332 }
 333
 334
 335 function getCookie(name) {
 336
 337         var dc = document.cookie;
 338         var prefix = name + "=";
 339         var begin = dc.indexOf("; " + prefix);
 340         if (begin == -1) {
 341             begin = dc.indexOf(prefix);
 342             if (begin != 0) return null;
 343         }
 344         else {
 345             begin += 2;
 346         }
 347         var end = document.cookie.indexOf(";", begin);
 348         if (end == -1) {
 349             end = dc.length;
 350         }
 351         return unescape(dc.substring(begin + prefix.length, end));
 352 }
 353
 354 function disableContainerChildren(id, disable, doc) {
 355
 356         if (!doc) doc = document;
 357
 358         var container = doc.getElementById(id);
 359
 360         if (!container) {
 361                 //alert("disableContainerChildren: element " + id + " not found");
 362                 return;
 363         }
 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         try {
 402                 debug("gAFID: " + getMainContext().active_feed_id);
 403                 return getMainContext().active_feed_id;
 404         } catch (e) {
 405                 exception_error("getActiveFeedId", e);
 406         }
 407 }
 408
 409 function setActiveFeedId(id) {
 410 //      return setCookie("ttrss_vf_actfeed", id);
 411         try {
 412                 getMainContext().active_feed_id = id;
 413         } catch (e) {
 414                 exception_error("setActiveFeedId", e);
 415         }
 416 }
 417
 418 var xmlhttp_rpc = Ajax.getTransport();
 419
 420 function parse_counters(reply, scheduled_call) {
 421         try {
 422                 var f_document = getFeedsContext().document;
 423                 var title_obj = getMainContext();
 424
 425                 debug("F_DOC: " + f_document + ", T_OBJ: " + title_obj);
 426
 427                 for (var l = 0; l < reply.childNodes.length; l++) {
 428                         if (!reply.childNodes[l] ||
 429                                 typeof(reply.childNodes[l].getAttribute) == "undefined") {
 430                                 // where did this come from?
 431                                 continue;
 432                         }
 433
 434                         var id = reply.childNodes[l].getAttribute("id");
 435                         var t = reply.childNodes[l].getAttribute("type");
 436                         var ctr = reply.childNodes[l].getAttribute("counter");
 437                         var error = reply.childNodes[l].getAttribute("error");
 438                         var has_img = reply.childNodes[l].getAttribute("hi");
 439                         var updated = reply.childNodes[l].getAttribute("updated");
 440
 441                         if (id == "global-unread") {
 442                                 title_obj.global_unread = ctr;
 443                                 title_obj.updateTitle();
 444                                 continue;
 445                         }
 446
 447                         if (t == "category") {
 448                                 var catctr = f_document.getElementById("FCATCTR-" + id);
 449                                 if (catctr) {
 450                                         catctr.innerHTML = "(" + ctr + " unread)";
 451                                 }
 452                                 continue;
 453                         }
 454
 455                         var feedctr = f_document.getElementById("FEEDCTR-" + id);
 456                         var feedu = f_document.getElementById("FEEDU-" + id);
 457                         var feedr = f_document.getElementById("FEEDR-" + id);
 458                         var feed_img = f_document.getElementById("FIMG-" + id);
 459                         var feedlink = f_document.getElementById("FEEDL-" + id);
 460
 461                         if (updated && feedlink) {
 462                                 if (error) {
 463                                         feedlink.title = "Error: " + error + " (" + updated + ")";
 464                                 } else {
 465                                         feedlink.title = "Updated: " + updated;
 466                                 }
 467                         }
 468
 469                         if (feedctr && feedu && feedr) {
 470
 471                                 if (feedu.innerHTML != ctr && id == getActiveFeedId() && scheduled_call) {
 472                                         var hf = title_obj.parent.frames["headlines-frame"];
 473                                         hf.location.reload(true);
 474                                 }
 475
 476                                 feedu.innerHTML = ctr;
 477
 478                                 if (error) {
 479                                         feedr.className = feedr.className.replace("feed", "error");
 480                                 } else if (id > 0) {
 481                                         feedr.className = feedr.className.replace("error", "feed");
 482                                 }
 483
 484                                 if (ctr > 0) {
 485                                         feedctr.className = "odd";
 486                                         if (!feedr.className.match("Unread")) {
 487                                                 var is_selected = feedr.className.match("Selected");
 488
 489                                                 feedr.className = feedr.className.replace("Selected", "");
 490                                                 feedr.className = feedr.className.replace("Unread", "");
 491
 492                                                 feedr.className = feedr.className + "Unread";
 493
 494                                                 if (is_selected) {
 495                                                         feedr.className = feedr.className + "Selected";
 496                                                 }
 497
 498                                         }
 499                                 } else {
 500                                         feedctr.className = "invisible";
 501                                         feedr.className = feedr.className.replace("Unread", "");
 502                                 }
 503                         }
 504                 }
 505         } catch (e) {
 506                 exception_error("parse_counters", e);
 507         }
 508 }
 509
 510 function all_counters_callback() {
 511         if (xmlhttp_rpc.readyState == 4) {
 512                 try {
 513                         if (!xmlhttp_rpc.responseXML || !xmlhttp_rpc.responseXML.firstChild) {
 514                                 notify("[all_counters_callback] backend did not return valid XML");
 515                                 return;
 516                         }
 517
 518                         var reply = xmlhttp_rpc.responseXML.firstChild;
 519
 520                         parse_counters(reply);
 521
 522                 } catch (e) {
 523                         exception_error("all_counters_callback", e);
 524                 }
 525         }
 526 }
 527
 528 function update_all_counters(feed) {
 529         if (xmlhttp_ready(xmlhttp_rpc)) {
 530                 var query = "backend.php?op=rpc&subop=getAllCounters";
 531
 532                 if (feed > 0) {
 533                         query = query + "&aid=" + feed;
 534                 }
 535
 536                 xmlhttp_rpc.open("GET", query, true);
 537                 xmlhttp_rpc.onreadystatechange=all_counters_callback;
 538                 xmlhttp_rpc.send(null);
 539         }
 540 }
 541
 542 function popupHelp(tid) {
 543         var w = window.open("backend.php?op=help&tid=" + tid,
 544                 "Popup Help",
 545                 "menubar=no,location=no,resizable=yes,scrollbars=yes,status=no");
 546 }
 547
 548 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 549   * * @author Sundar Dorai-Raj
 550   * * Email: sdoraira@vt.edu
 551   * * This program is free software; you can redistribute it and/or
 552   * * modify it under the terms of the GNU General Public License
 553   * * as published by the Free Software Foundation; either version 2
 554   * * of the License, or (at your option) any later version,
 555   * * provided that any use properly credits the author.
 556   * * This program is distributed in the hope that it will be useful,
 557   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 558   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 559   * * GNU General Public License for more details at http://www.gnu.org * * */
 560
 561   var numbers=".0123456789";
 562   function isNumeric(x) {
 563     // is x a String or a character?
 564     if(x.length>1) {
 565       // remove negative sign
 566       x=Math.abs(x)+"";
 567       for(j=0;j<x.length;j++) {
 568         // call isNumeric recursively for each character
 569         number=isNumeric(x.substring(j,j+1));
 570         if(!number) return number;
 571       }
 572       return number;
 573     }
 574     else {
 575       // if x is number return true
 576       if(numbers.indexOf(x)>=0) return true;
 577       return false;
 578     }
 579   }
 580
 581
 582 function hideOrShowFeeds(doc, hide) {
 583
 584         if (!doc.styleSheets) return;
 585
 586         var css_rules = doc.styleSheets[0].cssRules;
 587
 588         if (!css_rules || !css_rules.length) return;
 589
 590         for (i = 0; i < css_rules.length; i++) {
 591                 var rule = css_rules[i];
 592
 593                 if (rule.selectorText == "ul.feedList li.feed") {
 594                         if (!hide) {
 595                                 rule.style.display = "block";
 596                         } else {
 597                                 rule.style.display = "none";
 598                         }
 599                 }
 600
 601         }
 602
 603 }
 604
 605 function selectTableRow(r, do_select) {
 606         r.className = r.className.replace("Selected", "");
 607
 608         if (do_select) {
 609                 r.className = r.className + "Selected";
 610         }
 611 }
 612
 613 function selectTableRowById(elem_id, check_id, do_select) {
 614
 615         try {
 616
 617                 var row = document.getElementById(elem_id);
 618
 619                 if (row) {
 620                         selectTableRow(row, do_select);
 621                 }
 622
 623                 var check = document.getElementById(check_id);
 624
 625                 if (check) {
 626                         check.checked = do_select;
 627                 }
 628         } catch (e) {
 629                 exception_error("selectTableRowById", e);
 630         }
 631 }
 632
 633 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
 634         classcheck, reset_others) {
 635
 636         var content = document.getElementById(content_id);
 637
 638         if (!content) {
 639                 alert("[selectTableRows] Element " + content_id + " not found.");
 640                 return;
 641         }
 642
 643         for (i = 0; i < content.rows.length; i++) {
 644                 if (!classcheck || content.rows[i].className.match(classcheck)) {
 645
 646                         if (content.rows[i].id.match(prefix)) {
 647                                 selectTableRow(content.rows[i], do_select);
 648
 649                                 var row_id = content.rows[i].id.replace(prefix, "");
 650                                 var check = document.getElementById(check_prefix + row_id);
 651
 652                                 if (check) {
 653                                         check.checked = do_select;
 654                                 }
 655                         } else if (reset_others) {
 656                                 selectTableRow(content.rows[i], false);
 657
 658                                 var row_id = content.rows[i].id.replace(prefix, "");
 659                                 var check = document.getElementById(check_prefix + row_id);
 660
 661                                 if (check) {
 662                                         check.checked = false;
 663                                 }
 664
 665                         }
 666                 } else if (reset_others) {
 667                         selectTableRow(content.rows[i], false);
 668
 669                         var row_id = content.rows[i].id.replace(prefix, "");
 670                         var check = document.getElementById(check_prefix + row_id);
 671
 672                         if (check) {
 673                                 check.checked = false;
 674                         }
 675
 676                 }
 677         }
 678 }
 679
 680 function getSelectedTableRowIds(content_id, prefix) {
 681
 682         var content = document.getElementById(content_id);
 683
 684         if (!content) {
 685                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
 686                 return;
 687         }
 688
 689         var sel_rows = new Array();
 690
 691         for (i = 0; i < content.rows.length; i++) {
 692                 if (content.rows[i].id.match(prefix) &&
 693                                 content.rows[i].className.match("Selected")) {
 694
 695                         var row_id = content.rows[i].id.replace(prefix + "-", "");
 696                         sel_rows.push(row_id);
 697                 }
 698         }
 699
 700         return sel_rows;
 701
 702 }
 703
 704 function toggleSelectRowById(sender, id) {
 705         var row = document.getElementById(id);
 706
 707         if (sender.checked) {
 708                 if (!row.className.match("Selected")) {
 709                         row.className = row.className + "Selected";
 710                 }
 711         } else {
 712                 if (row.className.match("Selected")) {
 713                         row.className = row.className.replace("Selected", "");
 714                 }
 715         }
 716 }
 717
 718 function toggleSelectListRow(sender) {
 719         var parent_row = sender.parentNode;
 720
 721         if (sender.checked) {
 722                 if (!parent_row.className.match("Selected")) {
 723                         parent_row.className = parent_row.className + "Selected";
 724                 }
 725         } else {
 726                 if (parent_row.className.match("Selected")) {
 727                         parent_row.className = parent_row.className.replace("Selected", "");
 728                 }
 729         }
 730 }
 731
 732
 733 function toggleSelectRow(sender) {
 734         var parent_row = sender.parentNode.parentNode;
 735
 736         if (sender.checked) {
 737                 if (!parent_row.className.match("Selected")) {
 738                         parent_row.className = parent_row.className + "Selected";
 739                 }
 740         } else {
 741                 if (parent_row.className.match("Selected")) {
 742                         parent_row.className = parent_row.className.replace("Selected", "");
 743                 }
 744         }
 745 }
 746
 747 function openExternalUrl(url) {
 748         var w = window.open(url);
 749 }
 750
 751 function getRelativeFeedId(list, id, direction, unread_only) {
 752         if (!id) {
 753                 if (direction == "next") {
 754                         for (i = 0; i < list.childNodes.length; i++) {
 755                                 var child = list.childNodes[i];
 756                                 if (child.id && child.id == "feedCatHolder") {
 757                                         if (child.lastChild) {
 758                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 759                                                 if (cr) return cr;
 760                                         }
 761                                 } else if (child.id && child.id.match("FEEDR-")) {
 762                                         return child.id.replace('FEEDR-', '');
 763                                 }
 764                         }
 765                 }
 766
 767                 // FIXME select last feed doesn't work when only unread feeds are visible
 768
 769                 if (direction == "prev") {
 770                         for (i = list.childNodes.length-1; i >= 0; i--) {
 771                                 var child = list.childNodes[i];
 772                                 if (child.id == "feedCatHolder") {
 773                                         if (child.firstChild) {
 774                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 775                                                 if (cr) return cr;
 776                                         }
 777                                 } else if (child.id.match("FEEDR-")) {
 778
 779                                         if (getInitParam("hide_read_feeds") == 1) {
 780                                                 if (child.className != "feed") {
 781                                                         alert(child.className);
 782                                                         return child.id.replace('FEEDR-', '');
 783                                                 }
 784                                         } else {
 785                                                         return child.id.replace('FEEDR-', '');
 786                                         }
 787                                 }
 788                         }
 789                 }
 790         } else {
 791
 792                 var feed = list.ownerDocument.getElementById("FEEDR-" + getActiveFeedId());
 793
 794                 if (getInitParam("hide_read_feeds") == 1) {
 795                         unread_only = true;
 796                 }
 797
 798                 if (direction == "next") {
 799
 800                         var e = feed;
 801
 802                         while (e) {
 803
 804                                 if (e.nextSibling) {
 805
 806                                         e = e.nextSibling;
 807
 808                                 } else if (e.parentNode.parentNode.nextSibling) {
 809
 810                                         var this_cat = e.parentNode.parentNode;
 811
 812                                         e = false;
 813
 814                                         if (this_cat && this_cat.nextSibling) {
 815                                                 while (!e && this_cat.nextSibling) {
 816                                                         this_cat = this_cat.nextSibling;
 817                                                         if (this_cat.id == "feedCatHolder") {
 818                                                                 e = this_cat.firstChild.firstChild;
 819                                                         }
 820                                                 }
 821                                         }
 822
 823                                 } else {
 824                                         e = false;
 825                            }
 826
 827                                 if (e) {
 828                                         if (!unread_only || (unread_only && e.className != "feed" &&
 829                                                         e.className != "error"))        {
 830                                                 return e.id.replace("FEEDR-", "");
 831                                         }
 832                                 }
 833                         }
 834
 835                 } else if (direction == "prev") {
 836
 837                         var e = feed;
 838
 839                         while (e) {
 840
 841                                 if (e.previousSibling) {
 842
 843                                         e = e.previousSibling;
 844
 845                                 } else if (e.parentNode.parentNode.previousSibling) {
 846
 847                                         var this_cat = e.parentNode.parentNode;
 848
 849                                         e = false;
 850
 851                                         if (this_cat && this_cat.previousSibling) {
 852                                                 while (!e && this_cat.previousSibling) {
 853                                                         this_cat = this_cat.previousSibling;
 854                                                         if (this_cat.id == "feedCatHolder") {
 855                                                                 e = this_cat.firstChild.lastChild;
 856                                                         }
 857                                                 }
 858                                         }
 859
 860                                 } else {
 861                                         e = false;
 862                            }
 863
 864                                 if (e) {
 865                                         if (!unread_only || (unread_only && e.className != "feed" &&
 866                                                         e.className != "error"))        {
 867                                                 return e.id.replace("FEEDR-", "");
 868                                         }
 869                                 }
 870                         }
 871                 }
 872         }
 873 }
 874
 875 function showBlockElement(id) {
 876         var elem = document.getElementById(id);
 877
 878         if (elem) {
 879                 elem.style.display = "block";
 880         } else {
 881                 alert("[showBlockElement] can't find element with id " + id);
 882         }
 883 }
 884
 885 function hideParentElement(e) {
 886         e.parentNode.style.display = "none";
 887 }
 888
 889 function dropboxSelect(e, v) {
 890         for (i = 0; i < e.length; i++) {
 891                 if (e[i].value == v) {
 892                         e.selectedIndex = i;
 893                         break;
 894                 }
 895         }
 896 }
 897
 898 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
 899 // bugfixed just a little bit :-)
 900 function getURLParam(strParamName){
 901   var strReturn = "";
 902   var strHref = window.location.href;
 903
 904   if (strHref.indexOf("#") == strHref.length-1) {
 905                 strHref = strHref.substring(0, strHref.length-1);
 906   }
 907
 908   if ( strHref.indexOf("?") > -1 ){
 909     var strQueryString = strHref.substr(strHref.indexOf("?"));
 910     var aQueryString = strQueryString.split("&");
 911     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
 912       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
 913         var aParam = aQueryString[iParam].split("=");
 914         strReturn = aParam[1];
 915         break;
 916       }
 917     }
 918   }
 919   return strReturn;
 920 }
 921
 922 function leading_zero(p) {
 923         var s = String(p);
 924         if (s.length == 1) s = "0" + s;
 925         return s;
 926 }
 927
 928 function closeInfoBox(cleanup) {
 929         var box = document.getElementById('infoBox');
 930         var shadow = document.getElementById('infoBoxShadow');
 931
 932         if (shadow) {
 933                 shadow.style.display = "none";
 934         } else if (box) {
 935                 box.style.display = "none";
 936         }
 937
 938         if (cleanup) box.innerHTML = "&nbsp;";
 939
 940         enableHotkeys();
 941
 942 }
 943
 944
 945 function displayDlg(id, param) {
 946
 947         if (!xmlhttp_ready(xmlhttp)) {
 948                 printLockingError();
 949                 return
 950         }
 951
 952         notify("");
 953
 954         xmlhttp.open("GET", "backend.php?op=dlg&id=" +
 955                 param_escape(id) + "&param=" + param_escape(param), true);
 956         xmlhttp.onreadystatechange=infobox_callback;
 957         xmlhttp.send(null);
 958
 959         disableHotkeys();
 960
 961 }
 962
 963 function infobox_submit_callback() {
 964         if (xmlhttp.readyState == 4) {
 965                 closeInfoBox();
 966
 967                 // called from prefs, reload tab
 968                 if (active_tab) {
 969                         selectTab(active_tab, false);
 970                 }
 971
 972                 notify(xmlhttp.responseText);
 973
 974         }
 975 }
 976
 977 function infobox_callback() {
 978         if (xmlhttp.readyState == 4) {
 979                 var box = document.getElementById('infoBox');
 980                 var shadow = document.getElementById('infoBoxShadow');
 981                 if (box) {
 982                         box.innerHTML=xmlhttp.responseText;
 983                         if (shadow) {
 984                                 shadow.style.display = "block";
 985                         } else {
 986                                 box.style.display = "block";
 987                         }
 988                 }
 989         }
 990 }
 991
 992 function qaddFilter() {
 993
 994         if (!xmlhttp_ready(xmlhttp)) {
 995                 printLockingError();
 996                 return
 997         }
 998
 999         var query = Form.serialize("filter_add_form");
1000
1001         xmlhttp.open("GET", "backend.php?" + query, true);
1002         xmlhttp.onreadystatechange=infobox_submit_callback;
1003         xmlhttp.send(null);
1004
1005         return true;
1006 }
1007
1008 function toggleSubmitNotEmpty(e, submit_id) {
1009         try {
1010                 document.getElementById(submit_id).disabled = (e.value == "")
1011         } catch (e) {
1012                 exception_error("toggleSubmitNotEmpty", e);
1013         }
1014 }
1015
1016 function isValidURL(s) {
1017         return s.match("http://") != null || s.match("https://") != null;
1018 }
1019
1020 function qafAdd() {
1021
1022         if (!xmlhttp_ready(xmlhttp)) {
1023                 printLockingError();
1024                 return
1025         }
1026
1027         notify("Adding feed...");
1028
1029         closeInfoBox();
1030
1031         var feeds_doc = getFeedsContext().document;
1032
1033         feeds_doc.location.href = "backend.php?op=error&msg=Loading,%20please wait...";
1034
1035         var query = Form.serialize("feed_add_form");
1036
1037         xmlhttp.open("GET", "backend.php?" + query, true);
1038         xmlhttp.onreadystatechange=dlg_frefresh_callback;
1039         xmlhttp.send(null);
1040 }
1041
1042 function filterCR(e)
1043 {
1044      var key;
1045
1046      if(window.event)
1047           key = window.event.keyCode;     //IE
1048      else
1049           key = e.which;     //firefox
1050
1051      if(key == 13)
1052           return false;
1053      else
1054           return true;
1055 }
1056
1057 function getMainContext() {
1058         if (parent.window != window) {
1059                 return parent.window;
1060         } else {
1061                 return this.window;
1062         }
1063 }
1064
1065 function getFeedsContext() {
1066         try {
1067                 return getMainContext().frames["feeds-frame"];
1068         } catch (e) {
1069                 exception_error("getFeedsContext", e);
1070         }
1071 }
1072
1073 function debug(msg) {
1074         var ctx = getMainContext();
1075
1076         var c = ctx.document.getElementById('debug_output');
1077         if (c && c.style.display == "block") {
1078                 while (c.lastChild != 'undefined' && c.childNodes.length > 20) {
1079                         c.removeChild(c.lastChild);
1080                 }
1081
1082                 var d = new Date();
1083                 var ts = leading_zero(d.getHours()) + ":" + leading_zero(d.getMinutes()) +
1084                         ":" + leading_zero(d.getSeconds());
1085                 c.innerHTML = "<li>[" + ts + "] " + msg + "</li>" + c.innerHTML;
1086         }
1087 }
1088
1089 function getInitParam(key) {
1090         return getMainContext().init_params[key];
1091 }
1092
1093 // TODO: batch mode
1094 function storeInitParam(key, value, is_client) {
1095         try {
1096                 getMainContext().init_params[key] = value;
1097                 if (!is_client) {
1098                         new Ajax.Request("backend.php?op=rpc&subop=storeParam&key=" +
1099                                 param_escape(key) + "&value=" + param_escape(value));
1100                 }
1101         } catch (e) {
1102                 exception_error("storeInitParam", e);
1103         }
1104 }