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 - 0.2;
  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 (msg == "") {
 109                 n.style.display = "none";
 110         } else {
 111                 n.style.display = "block";
 112         }
 113
 114         if (is_err) {
 115                 n.style.backgroundColor = "#ffcccc";
 116                 n.style.color = "black";
 117                 n.style.borderColor = "#ff0000";
 118         } else {
 119                 n.style.backgroundColor = "#fff7d5";
 120                 n.style.borderColor = "#d7c47a";
 121                 n.style.color = "black";
 122         }
 123
 124         nb.innerHTML = msg;
 125
 126         if (notify_hide_timerid) {
 127                 window.clearTimeout(notify_hide_timerid);
 128         }
 129
 130         notify_last_doc = doc;
 131         notify_opacity = 1;
 132
 133         if (!no_hide) {
 134                 notify_hide_timerid = window.setTimeout("hide_notify()", 3000);
 135         }
 136 }
 137
 138 function p_notify(msg, no_hide, is_err) {
 139         notify_real(msg, parent.document, no_hide, is_err);
 140 }
 141
 142 function notify(msg, no_hide, is_err) {
 143         notify_real(msg, document, no_hide, is_err);
 144 }
 145
 146 function printLockingError() {
 147         notify("Please wait until operation finishes");}
 148
 149 var seq = "";
 150
 151 function hotkey_handler(e) {
 152
 153         var keycode;
 154
 155         if (!hotkeys_enabled) return;
 156
 157         if (window.event) {
 158                 keycode = window.event.keyCode;
 159         } else if (e) {
 160                 keycode = e.which;
 161         }
 162
 163         if (keycode == 13 || keycode == 27) {
 164                 seq = "";
 165         } else {
 166                 seq = seq + "" + keycode;
 167         }
 168
 169         if (document.getElementById("piggie")) {
 170
 171                 if (seq.match("807371717369")) {
 172                         seq = "";
 173                         localPiggieFunction(true);
 174                 } else {
 175                         localPiggieFunction(false);
 176                 }
 177         }
 178
 179         if (typeof localHotkeyHandler != 'undefined') {
 180                 try {
 181                         localHotkeyHandler(keycode);
 182                 } catch (e) {
 183                         exception_error("hotkey_handler", e);
 184                 }
 185         }
 186
 187 }
 188
 189 function cleanSelectedList(element) {
 190         var content = document.getElementById(element);
 191
 192         if (!document.getElementById("feedCatHolder")) {
 193                 for (i = 0; i < content.childNodes.length; i++) {
 194                         var child = content.childNodes[i];
 195                         try {
 196                                 child.className = child.className.replace("Selected", "");
 197                         } catch (e) {
 198                                 //
 199                         }
 200                 }
 201         } else {
 202                 for (i = 0; i < content.childNodes.length; i++) {
 203                         var child = content.childNodes[i];
 204                         if (child.id == "feedCatHolder") {
 205                                 parent.debug(child.id);
 206                                 var fcat = child.lastChild;
 207                                 for (j = 0; j < fcat.childNodes.length; j++) {
 208                                         var feed = fcat.childNodes[j];
 209                                         feed.className = feed.className.replace("Selected", "");
 210                                 }
 211                         }
 212                 }
 213         }
 214 }
 215
 216
 217 function cleanSelected(element) {
 218         var content = document.getElementById(element);
 219
 220         for (i = 0; i < content.rows.length; i++) {
 221                 content.rows[i].className = content.rows[i].className.replace("Selected", "");
 222         }
 223 }
 224
 225 function getVisibleUnreadHeadlines() {
 226         var content = document.getElementById("headlinesList");
 227
 228         var rows = new Array();
 229
 230         for (i = 0; i < content.rows.length; i++) {
 231                 var row_id = content.rows[i].id.replace("RROW-", "");
 232                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 233                                 rows.push(row_id);
 234                 }
 235         }
 236         return rows;
 237 }
 238
 239 function getVisibleHeadlineIds() {
 240
 241         var content = document.getElementById("headlinesList");
 242
 243         var rows = new Array();
 244
 245         for (i = 0; i < content.rows.length; i++) {
 246                 var row_id = content.rows[i].id.replace("RROW-", "");
 247                 if (row_id.length > 0) {
 248                                 rows.push(row_id);
 249                 }
 250         }
 251         return rows;
 252 }
 253
 254 function getFirstVisibleHeadlineId() {
 255         var rows = getVisibleHeadlineIds();
 256         return rows[0];
 257 }
 258
 259 function getLastVisibleHeadlineId() {
 260         var rows = getVisibleHeadlineIds();
 261         return rows[rows.length-1];
 262 }
 263
 264 function markHeadline(id) {
 265         var row = document.getElementById("RROW-" + id);
 266         if (row) {
 267                 var is_active = false;
 268
 269                 if (row.className.match("Active")) {
 270                         is_active = true;
 271                 }
 272                 row.className = row.className.replace("Selected", "");
 273                 row.className = row.className.replace("Active", "");
 274                 row.className = row.className.replace("Insensitive", "");
 275
 276                 if (is_active) {
 277                         row.className = row.className = "Active";
 278                 }
 279
 280                 var check = document.getElementById("RCHK-" + id);
 281
 282                 if (check) {
 283                         check.checked = true;
 284                 }
 285
 286                 row.className = row.className + "Selected";
 287
 288         }
 289 }
 290
 291 function getFeedIds() {
 292         var content = document.getElementById("feedsList");
 293
 294         var rows = new Array();
 295
 296         for (i = 0; i < content.rows.length; i++) {
 297                 var id = content.rows[i].id.replace("FEEDR-", "");
 298                 if (id.length > 0) {
 299                         rows.push(id);
 300                 }
 301         }
 302
 303         return rows;
 304 }
 305
 306 function setCookie(name, value, lifetime, path, domain, secure) {
 307
 308         var d = false;
 309
 310         if (lifetime) {
 311                 d = new Date();
 312                 d.setTime(lifetime * 1000);
 313         }
 314
 315         int_setCookie(name, value, d, path, domain, secure);
 316
 317 }
 318
 319 function int_setCookie(name, value, expires, path, domain, secure) {
 320         document.cookie= name + "=" + escape(value) +
 321                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 322                 ((path) ? "; path=" + path : "") +
 323                 ((domain) ? "; domain=" + domain : "") +
 324                 ((secure) ? "; secure" : "");
 325 }
 326
 327 function delCookie(name, path, domain) {
 328         if (getCookie(name)) {
 329                 document.cookie = name + "=" +
 330                 ((path) ? ";path=" + path : "") +
 331                 ((domain) ? ";domain=" + domain : "" ) +
 332                 ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
 333         }
 334 }
 335
 336
 337 function getCookie(name) {
 338
 339         var dc = document.cookie;
 340         var prefix = name + "=";
 341         var begin = dc.indexOf("; " + prefix);
 342         if (begin == -1) {
 343             begin = dc.indexOf(prefix);
 344             if (begin != 0) return null;
 345         }
 346         else {
 347             begin += 2;
 348         }
 349         var end = document.cookie.indexOf(";", begin);
 350         if (end == -1) {
 351             end = dc.length;
 352         }
 353         return unescape(dc.substring(begin + prefix.length, end));
 354 }
 355
 356 function disableContainerChildren(id, disable, doc) {
 357
 358         if (!doc) doc = document;
 359
 360         var container = doc.getElementById(id);
 361
 362         for (var i = 0; i < container.childNodes.length; i++) {
 363                 var child = container.childNodes[i];
 364
 365                 try {
 366                         child.disabled = disable;
 367                 } catch (E) {
 368
 369                 }
 370
 371                 if (disable) {
 372                         if (child.className && child.className.match("button")) {
 373                                 child.className = "disabledButton";
 374                         }
 375                 } else {
 376                         if (child.className && child.className.match("disabledButton")) {
 377                                 child.className = "button";
 378                         }
 379                 }
 380         }
 381
 382 }
 383
 384 function gotoPreferences() {
 385         document.location.href = "prefs.php";
 386 }
 387
 388 function gotoMain() {
 389         document.location.href = "tt-rss.php";
 390 }
 391
 392 function gotoExportOpml() {
 393         document.location.href = "opml.php?op=Export";
 394 }
 395
 396 function getActiveFeedId() {
 397         return getCookie("ttrss_vf_actfeed");
 398 }
 399
 400 function setActiveFeedId(id) {
 401         return setCookie("ttrss_vf_actfeed", id);
 402 }
 403
 404 var xmlhttp_rpc = false;
 405
 406 /*@cc_on @*/
 407 /*@if (@_jscript_version >= 5)
 408 // JScript gives us Conditional compilation, we can cope with old IE versions.
 409 // and security blocked creation of the objects.
 410 try {
 411         xmlhttp_rpc = new ActiveXObject("Msxml2.XMLHTTP");
 412 } catch (e) {
 413         try {
 414                 xmlhttp_rpc = new ActiveXObject("Microsoft.XMLHTTP");
 415         } catch (E) {
 416                 xmlhttp_rpc = false;
 417         }
 418 }
 419 @end @*/
 420
 421 if (!xmlhttp_rpc && typeof XMLHttpRequest!='undefined') {
 422         xmlhttp_rpc = new XMLHttpRequest();
 423 }
 424
 425 function parse_counters(reply, f_document, title_obj, scheduled_call) {
 426         try {
 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 // this one is called from feedlist context
 511 // thus title_obj passed to parse_counters is parent (e.g. main ttrss window)
 512
 513 function all_counters_callback() {
 514         if (xmlhttp_rpc.readyState == 4) {
 515                 try {
 516                         if (!xmlhttp_rpc.responseXML || !xmlhttp_rpc.responseXML.firstChild) {
 517                                 notify("[all_counters_callback] backend did not return valid XML");
 518                                 return;
 519                         }
 520
 521                         if (!parent.frames["feeds-frame"]) {
 522                                 notify("[all_counters_callback] no parent feeds-frame");
 523                                 return;
 524                         }
 525
 526                         var reply = xmlhttp_rpc.responseXML.firstChild;
 527                         var f_document = parent.frames["feeds-frame"].document;
 528
 529                         parse_counters(reply, f_document, parent);
 530
 531                 } catch (e) {
 532                         exception_error("all_counters_callback", e);
 533                 }
 534         }
 535 }
 536
 537 function update_all_counters(feed) {
 538         if (xmlhttp_ready(xmlhttp_rpc)) {
 539                 var query = "backend.php?op=rpc&subop=getAllCounters";
 540
 541                 if (feed > 0) {
 542                         query = query + "&aid=" + feed;
 543                 }
 544
 545                 xmlhttp_rpc.open("GET", query, true);
 546                 xmlhttp_rpc.onreadystatechange=all_counters_callback;
 547                 xmlhttp_rpc.send(null);
 548         }
 549 }
 550
 551 function popupHelp(tid) {
 552         var w = window.open("backend.php?op=help&tid=" + tid,
 553                 "Popup Help",
 554                 "menubar=no,location=no,resizable=yes,scrollbars=yes,status=no");
 555 }
 556
 557 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 558   * * @author Sundar Dorai-Raj
 559   * * Email: sdoraira@vt.edu
 560   * * This program is free software; you can redistribute it and/or
 561   * * modify it under the terms of the GNU General Public License
 562   * * as published by the Free Software Foundation; either version 2
 563   * * of the License, or (at your option) any later version,
 564   * * provided that any use properly credits the author.
 565   * * This program is distributed in the hope that it will be useful,
 566   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 567   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 568   * * GNU General Public License for more details at http://www.gnu.org * * */
 569
 570   var numbers=".0123456789";
 571   function isNumeric(x) {
 572     // is x a String or a character?
 573     if(x.length>1) {
 574       // remove negative sign
 575       x=Math.abs(x)+"";
 576       for(j=0;j<x.length;j++) {
 577         // call isNumeric recursively for each character
 578         number=isNumeric(x.substring(j,j+1));
 579         if(!number) return number;
 580       }
 581       return number;
 582     }
 583     else {
 584       // if x is number return true
 585       if(numbers.indexOf(x)>=0) return true;
 586       return false;
 587     }
 588   }
 589
 590
 591 function hideOrShowFeeds(doc, hide) {
 592
 593         if (!doc.styleSheets) return;
 594
 595         var css_rules = doc.styleSheets[0].cssRules;
 596
 597         if (!css_rules || !css_rules.length) return;
 598
 599         for (i = 0; i < css_rules.length; i++) {
 600                 var rule = css_rules[i];
 601
 602                 if (rule.selectorText == "ul.feedList li.feed") {
 603                         if (!hide) {
 604                                 rule.style.display = "block";
 605                         } else {
 606                                 rule.style.display = "none";
 607                         }
 608                 }
 609
 610         }
 611
 612 }
 613
 614 function selectTableRow(r, do_select) {
 615         r.className = r.className.replace("Selected", "");
 616
 617         if (do_select) {
 618                 r.className = r.className + "Selected";
 619         }
 620 }
 621
 622 function selectTableRowById(elem_id, check_id, do_select) {
 623
 624         try {
 625
 626                 var row = document.getElementById(elem_id);
 627
 628                 if (row) {
 629                         selectTableRow(row, do_select);
 630                 }
 631
 632                 var check = document.getElementById(check_id);
 633
 634                 if (check) {
 635                         check.checked = do_select;
 636                 }
 637         } catch (e) {
 638                 exception_error("selectTableRowById", e);
 639         }
 640 }
 641
 642 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
 643         classcheck, reset_others) {
 644
 645         var content = document.getElementById(content_id);
 646
 647         if (!content) {
 648                 alert("[selectTableRows] Element " + content_id + " not found.");
 649                 return;
 650         }
 651
 652         for (i = 0; i < content.rows.length; i++) {
 653                 if (!classcheck || content.rows[i].className.match(classcheck)) {
 654
 655                         if (content.rows[i].id.match(prefix)) {
 656                                 selectTableRow(content.rows[i], do_select);
 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 = do_select;
 663                                 }
 664                         } else if (reset_others) {
 665                                 selectTableRow(content.rows[i], false);
 666
 667                                 var row_id = content.rows[i].id.replace(prefix, "");
 668                                 var check = document.getElementById(check_prefix + row_id);
 669
 670                                 if (check) {
 671                                         check.checked = false;
 672                                 }
 673
 674                         }
 675                 } else if (reset_others) {
 676                         selectTableRow(content.rows[i], false);
 677
 678                         var row_id = content.rows[i].id.replace(prefix, "");
 679                         var check = document.getElementById(check_prefix + row_id);
 680
 681                         if (check) {
 682                                 check.checked = false;
 683                         }
 684
 685                 }
 686         }
 687 }
 688
 689 function getSelectedTableRowIds(content_id, prefix) {
 690
 691         var content = document.getElementById(content_id);
 692
 693         if (!content) {
 694                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
 695                 return;
 696         }
 697
 698         var sel_rows = new Array();
 699
 700         for (i = 0; i < content.rows.length; i++) {
 701                 if (content.rows[i].id.match(prefix) &&
 702                                 content.rows[i].className.match("Selected")) {
 703
 704                         var row_id = content.rows[i].id.replace(prefix + "-", "");
 705                         sel_rows.push(row_id);
 706                 }
 707         }
 708
 709         return sel_rows;
 710
 711 }
 712
 713 function toggleSelectRowById(sender, id) {
 714         var row = document.getElementById(id);
 715
 716         if (sender.checked) {
 717                 if (!row.className.match("Selected")) {
 718                         row.className = row.className + "Selected";
 719                 }
 720         } else {
 721                 if (row.className.match("Selected")) {
 722                         row.className = row.className.replace("Selected", "");
 723                 }
 724         }
 725 }
 726
 727 function toggleSelectListRow(sender) {
 728         var parent_row = sender.parentNode;
 729
 730         if (sender.checked) {
 731                 if (!parent_row.className.match("Selected")) {
 732                         parent_row.className = parent_row.className + "Selected";
 733                 }
 734         } else {
 735                 if (parent_row.className.match("Selected")) {
 736                         parent_row.className = parent_row.className.replace("Selected", "");
 737                 }
 738         }
 739 }
 740
 741
 742 function toggleSelectRow(sender) {
 743         var parent_row = sender.parentNode.parentNode;
 744
 745         if (sender.checked) {
 746                 if (!parent_row.className.match("Selected")) {
 747                         parent_row.className = parent_row.className + "Selected";
 748                 }
 749         } else {
 750                 if (parent_row.className.match("Selected")) {
 751                         parent_row.className = parent_row.className.replace("Selected", "");
 752                 }
 753         }
 754 }
 755
 756 function openExternalUrl(url) {
 757         var w = window.open(url);
 758 }
 759
 760 function getRelativeFeedId(list, id, direction, unread_only) {
 761         if (!id) {
 762                 if (direction == "next") {
 763                         for (i = 0; i < list.childNodes.length; i++) {
 764                                 var child = list.childNodes[i];
 765                                 if (child.id && child.id == "feedCatHolder") {
 766                                         if (child.lastChild) {
 767                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 768                                                 if (cr) return cr;
 769                                         }
 770                                 } else if (child.id && child.id.match("FEEDR-")) {
 771                                         return child.id.replace('FEEDR-', '');
 772                                 }
 773                         }
 774                 }
 775
 776                 // FIXME select last feed doesn't work when only unread feeds are visible
 777
 778                 if (direction == "prev") {
 779                         for (i = list.childNodes.length-1; i >= 0; i--) {
 780                                 var child = list.childNodes[i];
 781                                 if (child.id == "feedCatHolder") {
 782                                         if (child.firstChild) {
 783                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 784                                                 if (cr) return cr;
 785                                         }
 786                                 } else if (child.id.match("FEEDR-")) {
 787
 788                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 789                                                 if (child.className != "feed") {
 790                                                         alert(child.className);
 791                                                         return child.id.replace('FEEDR-', '');
 792                                                 }
 793                                         } else {
 794                                                         return child.id.replace('FEEDR-', '');
 795                                         }
 796                                 }
 797                         }
 798                 }
 799         } else {
 800
 801                 var feed = list.ownerDocument.getElementById("FEEDR-" + getActiveFeedId());
 802
 803                 if (getCookie("ttrss_vf_hreadf") == 1) {
 804                         unread_only = true;
 805                 }
 806
 807                 if (direction == "next") {
 808
 809                         var e = feed;
 810
 811                         while (e) {
 812
 813                                 if (e.nextSibling) {
 814
 815                                         e = e.nextSibling;
 816
 817                                 } else if (e.parentNode.parentNode.nextSibling) {
 818
 819                                         var this_cat = e.parentNode.parentNode;
 820
 821                                         e = false;
 822
 823                                         if (this_cat && this_cat.nextSibling) {
 824                                                 while (!e && this_cat.nextSibling) {
 825                                                         this_cat = this_cat.nextSibling;
 826                                                         if (this_cat.id == "feedCatHolder") {
 827                                                                 e = this_cat.firstChild.firstChild;
 828                                                         }
 829                                                 }
 830                                         }
 831
 832                                 } else {
 833                                         e = false;
 834                            }
 835
 836                                 if (e) {
 837                                         if (!unread_only || (unread_only && e.className != "feed" &&
 838                                                         e.className != "error"))        {
 839                                                 return e.id.replace("FEEDR-", "");
 840                                         }
 841                                 }
 842                         }
 843
 844                 } else if (direction == "prev") {
 845
 846                         var e = feed;
 847
 848                         while (e) {
 849
 850                                 if (e.previousSibling) {
 851
 852                                         e = e.previousSibling;
 853
 854                                 } else if (e.parentNode.parentNode.previousSibling) {
 855
 856                                         var this_cat = e.parentNode.parentNode;
 857
 858                                         e = false;
 859
 860                                         if (this_cat && this_cat.previousSibling) {
 861                                                 while (!e && this_cat.previousSibling) {
 862                                                         this_cat = this_cat.previousSibling;
 863                                                         if (this_cat.id == "feedCatHolder") {
 864                                                                 e = this_cat.firstChild.lastChild;
 865                                                         }
 866                                                 }
 867                                         }
 868
 869                                 } else {
 870                                         e = false;
 871                            }
 872
 873                                 if (e) {
 874                                         if (!unread_only || (unread_only && e.className != "feed" &&
 875                                                         e.className != "error"))        {
 876                                                 return e.id.replace("FEEDR-", "");
 877                                         }
 878                                 }
 879                         }
 880                 }
 881         }
 882 }
 883
 884 function showBlockElement(id) {
 885         var elem = document.getElementById(id);
 886
 887         if (elem) {
 888                 elem.style.display = "block";
 889         } else {
 890                 alert("[showBlockElement] can't find element with id " + id);
 891         }
 892 }
 893
 894 function hideParentElement(e) {
 895         e.parentNode.style.display = "none";
 896 }
 897
 898 function dropboxSelect(e, v) {
 899         for (i = 0; i < e.length; i++) {
 900                 if (e[i].value == v) {
 901                         e.selectedIndex = i;
 902                         break;
 903                 }
 904         }
 905 }
 906
 907 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
 908 // bugfixed just a little bit :-)
 909 function getURLParam(strParamName){
 910   var strReturn = "";
 911   var strHref = window.location.href;
 912
 913   if (strHref.indexOf("#") == strHref.length-1) {
 914                 strHref = strHref.substring(0, strHref.length-1);
 915   }
 916
 917   if ( strHref.indexOf("?") > -1 ){
 918     var strQueryString = strHref.substr(strHref.indexOf("?"));
 919     var aQueryString = strQueryString.split("&");
 920     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
 921       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
 922         var aParam = aQueryString[iParam].split("=");
 923         strReturn = aParam[1];
 924         break;
 925       }
 926     }
 927   }
 928   return strReturn;
 929 }
 930
 931 function leading_zero(p) {
 932         var s = String(p);
 933         if (s.length == 1) s = "0" + s;
 934         return s;
 935 }
 936
 937 function center_element(e) {
 938
 939         try {
 940                 var c_width = document.body.clientWidth;
 941                 var c_height = document.body.clientHeight;
 942
 943                 var c_scroll = document.body.scrollTop;
 944
 945                 var e_width = e.clientWidth;
 946                 var e_height = e.clientHeight;
 947
 948                 var set_y = (c_height / 2) + c_scroll - (e_height / 2);
 949                 var set_x = (c_width / 2) - (e_width / 2);
 950
 951                 e.style.top = set_y + "px";
 952                 e.style.left = set_x + "px";
 953         } catch (e) {
 954                 exception_error("center_element", e);
 955         }
 956 }
 957
 958 function closeInfoBox() {
 959         var box = document.getElementById('infoBox');
 960         var shadow = document.getElementById('infoBoxShadow');
 961
 962         if (shadow) {
 963                 shadow.style.display = "none";
 964         } else if (box) {
 965                 box.style.display = "none";
 966         }
 967
 968         enableHotkeys();
 969 }
 970
 971
 972 function displayDlg(id, param) {
 973
 974         if (!xmlhttp_ready(xmlhttp)) {
 975                 printLockingError();
 976                 return
 977         }
 978
 979         notify("");
 980
 981         xmlhttp.open("GET", "backend.php?op=dlg&id=" +
 982                 param_escape(id) + "&param=" + param_escape(param), true);
 983         xmlhttp.onreadystatechange=infobox_callback;
 984         xmlhttp.send(null);
 985
 986         disableHotkeys();
 987
 988 }
 989
 990 function infobox_submit_callback() {
 991         if (xmlhttp.readyState == 4) {
 992                 notify(xmlhttp.responseText);
 993                 closeInfoBox();
 994
 995                 // called from prefs, reload tab
 996                 if (active_tab) {
 997                         selectTab(active_tab, false);
 998                 }
 999         }
1000 }
1001
1002 function infobox_callback() {
1003         if (xmlhttp.readyState == 4) {
1004                 var box = document.getElementById('infoBox');
1005                 var shadow = document.getElementById('infoBoxShadow');
1006                 if (box) {
1007                         box.innerHTML=xmlhttp.responseText;
1008                         if (shadow) {
1009                                 shadow.style.display = "block";
1010                         } else {
1011                                 box.style.display = "block";
1012                         }
1013                 }
1014         }
1015 }
1016
1017 function qaddFilter() {
1018
1019         if (!xmlhttp_ready(xmlhttp)) {
1020                 printLockingError();
1021                 return
1022         }
1023
1024         var regexp = document.getElementById("fadd_regexp");
1025         var match = document.getElementById("fadd_match");
1026         var feed = document.getElementById("fadd_feed");
1027         var action = document.getElementById("fadd_action");
1028
1029         if (regexp.value.length == 0) {
1030                 alert("Missing filter expression.");
1031         } else {
1032                 notify("Adding filter...");
1033
1034                 var v_match = match[match.selectedIndex].text;
1035                 var feed_id = feed[feed.selectedIndex].id;
1036                 var action_id = action[action.selectedIndex].id;
1037
1038                 xmlhttp.open("GET", "backend.php?op=pref-filters&quiet=1&subop=add&regexp=" +
1039                         param_escape(regexp.value) + "&match=" + v_match +
1040                         "&fid=" + param_escape(feed_id) + "&aid=" + param_escape(action_id), true);
1041
1042                 xmlhttp.onreadystatechange=infobox_submit_callback;
1043                 xmlhttp.send(null);
1044
1045                 regexp.value = "";
1046         }
1047
1048 }
1049
1050 function toggleSubmitNotEmpty(e, submit_id) {
1051         try {
1052                 document.getElementById(submit_id).disabled = (e.value == "")
1053         } catch (e) {
1054                 exception_error("toggleSubmitNotEmpty", e);
1055         }
1056 }
1057
1058 function isValidURL(s) {
1059         return s.match("http://") != null || s.match("https://") != null;
1060 }