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 var notify_effect = false;
  84
  85 function hide_notify() {
  86         if (notify_last_doc) {
  87                 var n = notify_last_doc.getElementById("notify");
  88                 if (browser_has_opacity()) {
  89                         if (notify_opacity >= 0) {
  90                                 notify_opacity = notify_opacity - 0.1;
  91                                 n.style.opacity = notify_opacity;
  92                                 notify_hide_timerid = window.setTimeout("hide_notify()", 20);
  93                         } else {
  94                                 n.style.display = "none";
  95                                 n.style.opacity = 1;
  96                         }
  97                 } else {
  98                         n.style.display = "none";
  99                 }
 100         }
 101 }
 102
 103 function notify_real(msg, doc, no_hide, is_err) {
 104
 105         var n = doc.getElementById("notify");
 106         var nb = doc.getElementById("notify_body");
 107
 108         if (!n || !nb) return;
 109
 110         if (notify_hide_timerid) {
 111                 window.clearTimeout(notify_hide_timerid);
 112         }
 113
 114         notify_last_doc = doc;
 115         notify_opacity = 1;
 116
 117         if (msg == "") {
 118                 if (n.style.display == "block") {
 119                         notify_hide_timerid = window.setTimeout("hide_notify()", 0);
 120                 }
 121                 return;
 122         } else {
 123                 n.style.display = "block";
 124         }
 125
 126         if (is_err) {
 127                 n.style.backgroundColor = "#ffcccc";
 128                 n.style.color = "black";
 129                 n.style.borderColor = "#ff0000";
 130         } else {
 131                 n.style.backgroundColor = "#fff7d5";
 132                 n.style.borderColor = "#d7c47a";
 133                 n.style.color = "black";
 134         }
 135
 136         nb.innerHTML = msg;
 137
 138         if (!no_hide) {
 139                 notify_hide_timerid = window.setTimeout("hide_notify()", 3000);
 140         }
 141 }
 142
 143 function p_notify(msg, no_hide, is_err) {
 144         notify_real(msg, parent.document, no_hide, is_err);
 145 }
 146
 147 function notify(msg, no_hide, is_err) {
 148         notify_real(msg, document, no_hide, is_err);
 149 }
 150
 151 function printLockingError() {
 152         notify("Please wait until operation finishes");}
 153
 154 var seq = "";
 155
 156 function hotkey_handler(e) {
 157
 158         var keycode;
 159
 160         if (!hotkeys_enabled) return;
 161
 162         if (window.event) {
 163                 keycode = window.event.keyCode;
 164         } else if (e) {
 165                 keycode = e.which;
 166         }
 167
 168         if (keycode == 13 || keycode == 27) {
 169                 seq = "";
 170         } else {
 171                 seq = seq + "" + keycode;
 172         }
 173
 174         if (document.getElementById("piggie")) {
 175
 176                 if (seq.match("807371717369")) {
 177                         seq = "";
 178                         localPiggieFunction(true);
 179                 } else {
 180                         localPiggieFunction(false);
 181                 }
 182         }
 183
 184         if (typeof localHotkeyHandler != 'undefined') {
 185                 try {
 186                         localHotkeyHandler(keycode);
 187                 } catch (e) {
 188                         exception_error("hotkey_handler", e);
 189                 }
 190         }
 191
 192 }
 193
 194 function cleanSelectedList(element) {
 195         var content = document.getElementById(element);
 196
 197         if (!document.getElementById("feedCatHolder")) {
 198                 for (i = 0; i < content.childNodes.length; i++) {
 199                         var child = content.childNodes[i];
 200                         try {
 201                                 child.className = child.className.replace("Selected", "");
 202                         } catch (e) {
 203                                 //
 204                         }
 205                 }
 206         } else {
 207                 for (i = 0; i < content.childNodes.length; i++) {
 208                         var child = content.childNodes[i];
 209                         if (child.id == "feedCatHolder") {
 210                                 parent.debug(child.id);
 211                                 var fcat = child.lastChild;
 212                                 for (j = 0; j < fcat.childNodes.length; j++) {
 213                                         var feed = fcat.childNodes[j];
 214                                         feed.className = feed.className.replace("Selected", "");
 215                                 }
 216                         }
 217                 }
 218         }
 219 }
 220
 221
 222 function cleanSelected(element) {
 223         var content = document.getElementById(element);
 224
 225         for (i = 0; i < content.rows.length; i++) {
 226                 content.rows[i].className = content.rows[i].className.replace("Selected", "");
 227         }
 228 }
 229
 230 function getVisibleUnreadHeadlines() {
 231         var content = document.getElementById("headlinesList");
 232
 233         var rows = new Array();
 234
 235         for (i = 0; i < content.rows.length; i++) {
 236                 var row_id = content.rows[i].id.replace("RROW-", "");
 237                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 238                                 rows.push(row_id);
 239                 }
 240         }
 241         return rows;
 242 }
 243
 244 function getVisibleHeadlineIds() {
 245
 246         var content = document.getElementById("headlinesList");
 247
 248         var rows = new Array();
 249
 250         for (i = 0; i < content.rows.length; i++) {
 251                 var row_id = content.rows[i].id.replace("RROW-", "");
 252                 if (row_id.length > 0) {
 253                                 rows.push(row_id);
 254                 }
 255         }
 256         return rows;
 257 }
 258
 259 function getFirstVisibleHeadlineId() {
 260         var rows = getVisibleHeadlineIds();
 261         return rows[0];
 262 }
 263
 264 function getLastVisibleHeadlineId() {
 265         var rows = getVisibleHeadlineIds();
 266         return rows[rows.length-1];
 267 }
 268
 269 function markHeadline(id) {
 270         var row = document.getElementById("RROW-" + id);
 271         if (row) {
 272                 var is_active = false;
 273
 274                 if (row.className.match("Active")) {
 275                         is_active = true;
 276                 }
 277                 row.className = row.className.replace("Selected", "");
 278                 row.className = row.className.replace("Active", "");
 279                 row.className = row.className.replace("Insensitive", "");
 280
 281                 if (is_active) {
 282                         row.className = row.className = "Active";
 283                 }
 284
 285                 var check = document.getElementById("RCHK-" + id);
 286
 287                 if (check) {
 288                         check.checked = true;
 289                 }
 290
 291                 row.className = row.className + "Selected";
 292
 293         }
 294 }
 295
 296 function getFeedIds() {
 297         var content = document.getElementById("feedsList");
 298
 299         var rows = new Array();
 300
 301         for (i = 0; i < content.rows.length; i++) {
 302                 var id = content.rows[i].id.replace("FEEDR-", "");
 303                 if (id.length > 0) {
 304                         rows.push(id);
 305                 }
 306         }
 307
 308         return rows;
 309 }
 310
 311 function setCookie(name, value, lifetime, path, domain, secure) {
 312
 313         var d = false;
 314
 315         if (lifetime) {
 316                 d = new Date();
 317                 d.setTime(lifetime * 1000);
 318         }
 319
 320         int_setCookie(name, value, d, path, domain, secure);
 321
 322 }
 323
 324 function int_setCookie(name, value, expires, path, domain, secure) {
 325         document.cookie= name + "=" + escape(value) +
 326                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 327                 ((path) ? "; path=" + path : "") +
 328                 ((domain) ? "; domain=" + domain : "") +
 329                 ((secure) ? "; secure" : "");
 330 }
 331
 332 function delCookie(name, path, domain) {
 333         if (getCookie(name)) {
 334                 document.cookie = name + "=" +
 335                 ((path) ? ";path=" + path : "") +
 336                 ((domain) ? ";domain=" + domain : "" ) +
 337                 ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
 338         }
 339 }
 340
 341
 342 function getCookie(name) {
 343
 344         var dc = document.cookie;
 345         var prefix = name + "=";
 346         var begin = dc.indexOf("; " + prefix);
 347         if (begin == -1) {
 348             begin = dc.indexOf(prefix);
 349             if (begin != 0) return null;
 350         }
 351         else {
 352             begin += 2;
 353         }
 354         var end = document.cookie.indexOf(";", begin);
 355         if (end == -1) {
 356             end = dc.length;
 357         }
 358         return unescape(dc.substring(begin + prefix.length, end));
 359 }
 360
 361 function disableContainerChildren(id, disable, doc) {
 362
 363         if (!doc) doc = document;
 364
 365         var container = doc.getElementById(id);
 366
 367         if (!container) {
 368                 //alert("disableContainerChildren: element " + id + " not found");
 369                 return;
 370         }
 371
 372         for (var i = 0; i < container.childNodes.length; i++) {
 373                 var child = container.childNodes[i];
 374
 375                 try {
 376                         child.disabled = disable;
 377                 } catch (E) {
 378
 379                 }
 380
 381                 if (disable) {
 382                         if (child.className && child.className.match("button")) {
 383                                 child.className = "disabledButton";
 384                         }
 385                 } else {
 386                         if (child.className && child.className.match("disabledButton")) {
 387                                 child.className = "button";
 388                         }
 389                 }
 390         }
 391
 392 }
 393
 394 function gotoPreferences() {
 395         document.location.href = "prefs.php";
 396 }
 397
 398 function gotoMain() {
 399         document.location.href = "tt-rss.php";
 400 }
 401
 402 function gotoExportOpml() {
 403         document.location.href = "opml.php?op=Export";
 404 }
 405
 406 function getActiveFeedId() {
 407 //      return getCookie("ttrss_vf_actfeed");
 408         try {
 409                 debug("gAFID: " + getMainContext().active_feed_id);
 410                 return getMainContext().active_feed_id;
 411         } catch (e) {
 412                 exception_error("getActiveFeedId", e);
 413         }
 414 }
 415
 416 function setActiveFeedId(id) {
 417 //      return setCookie("ttrss_vf_actfeed", id);
 418         try {
 419                 getMainContext().active_feed_id = id;
 420         } catch (e) {
 421                 exception_error("setActiveFeedId", e);
 422         }
 423 }
 424
 425 var xmlhttp_rpc = Ajax.getTransport();
 426
 427 function parse_counters(reply, scheduled_call) {
 428         try {
 429                 var f_document = getFeedsContext().document;
 430                 var title_obj = getMainContext();
 431
 432                 debug("F_DOC: " + f_document + ", T_OBJ: " + title_obj);
 433
 434                 for (var l = 0; l < reply.childNodes.length; l++) {
 435                         if (!reply.childNodes[l] ||
 436                                 typeof(reply.childNodes[l].getAttribute) == "undefined") {
 437                                 // where did this come from?
 438                                 continue;
 439                         }
 440
 441                         var id = reply.childNodes[l].getAttribute("id");
 442                         var t = reply.childNodes[l].getAttribute("type");
 443                         var ctr = reply.childNodes[l].getAttribute("counter");
 444                         var error = reply.childNodes[l].getAttribute("error");
 445                         var has_img = reply.childNodes[l].getAttribute("hi");
 446                         var updated = reply.childNodes[l].getAttribute("updated");
 447
 448                         if (id == "global-unread") {
 449                                 title_obj.global_unread = ctr;
 450                                 title_obj.updateTitle();
 451                                 continue;
 452                         }
 453
 454                         if (t == "category") {
 455                                 var catctr = f_document.getElementById("FCATCTR-" + id);
 456                                 if (catctr) {
 457                                         catctr.innerHTML = "(" + ctr + " unread)";
 458                                 }
 459                                 continue;
 460                         }
 461
 462                         var feedctr = f_document.getElementById("FEEDCTR-" + id);
 463                         var feedu = f_document.getElementById("FEEDU-" + id);
 464                         var feedr = f_document.getElementById("FEEDR-" + id);
 465                         var feed_img = f_document.getElementById("FIMG-" + id);
 466                         var feedlink = f_document.getElementById("FEEDL-" + id);
 467
 468                         if (updated && feedlink) {
 469                                 if (error) {
 470                                         feedlink.title = "Error: " + error + " (" + updated + ")";
 471                                 } else {
 472                                         feedlink.title = "Updated: " + updated;
 473                                 }
 474                         }
 475
 476                         if (feedctr && feedu && feedr) {
 477
 478                                 if (feedu.innerHTML != ctr && id == getActiveFeedId() && scheduled_call) {
 479                                         var hf = title_obj.parent.frames["headlines-frame"];
 480                                         hf.location.reload(true);
 481                                 }
 482
 483                                 feedu.innerHTML = ctr;
 484
 485                                 if (error) {
 486                                         feedr.className = feedr.className.replace("feed", "error");
 487                                 } else if (id > 0) {
 488                                         feedr.className = feedr.className.replace("error", "feed");
 489                                 }
 490
 491                                 if (ctr > 0) {
 492                                         feedctr.className = "odd";
 493                                         if (!feedr.className.match("Unread")) {
 494                                                 var is_selected = feedr.className.match("Selected");
 495
 496                                                 feedr.className = feedr.className.replace("Selected", "");
 497                                                 feedr.className = feedr.className.replace("Unread", "");
 498
 499                                                 feedr.className = feedr.className + "Unread";
 500
 501                                                 if (is_selected) {
 502                                                         feedr.className = feedr.className + "Selected";
 503                                                 }
 504
 505                                         }
 506                                 } else {
 507                                         feedctr.className = "invisible";
 508                                         feedr.className = feedr.className.replace("Unread", "");
 509                                 }
 510                         }
 511                 }
 512         } catch (e) {
 513                 exception_error("parse_counters", e);
 514         }
 515 }
 516
 517 function all_counters_callback() {
 518         if (xmlhttp_rpc.readyState == 4) {
 519                 try {
 520                         if (!xmlhttp_rpc.responseXML || !xmlhttp_rpc.responseXML.firstChild) {
 521                                 notify("[all_counters_callback] backend did not return valid XML");
 522                                 return;
 523                         }
 524
 525                         var reply = xmlhttp_rpc.responseXML.firstChild;
 526
 527                         parse_counters(reply);
 528
 529                 } catch (e) {
 530                         exception_error("all_counters_callback", e);
 531                 }
 532         }
 533 }
 534
 535 function update_all_counters(feed) {
 536         if (xmlhttp_ready(xmlhttp_rpc)) {
 537                 var query = "backend.php?op=rpc&subop=getAllCounters";
 538
 539                 if (feed > 0) {
 540                         query = query + "&aid=" + feed;
 541                 }
 542
 543                 xmlhttp_rpc.open("GET", query, true);
 544                 xmlhttp_rpc.onreadystatechange=all_counters_callback;
 545                 xmlhttp_rpc.send(null);
 546         }
 547 }
 548
 549 function popupHelp(tid) {
 550         var w = window.open("backend.php?op=help&tid=" + tid,
 551                 "Popup Help",
 552                 "menubar=no,location=no,resizable=yes,scrollbars=yes,status=no");
 553 }
 554
 555 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 556   * * @author Sundar Dorai-Raj
 557   * * Email: sdoraira@vt.edu
 558   * * This program is free software; you can redistribute it and/or
 559   * * modify it under the terms of the GNU General Public License
 560   * * as published by the Free Software Foundation; either version 2
 561   * * of the License, or (at your option) any later version,
 562   * * provided that any use properly credits the author.
 563   * * This program is distributed in the hope that it will be useful,
 564   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 565   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 566   * * GNU General Public License for more details at http://www.gnu.org * * */
 567
 568   var numbers=".0123456789";
 569   function isNumeric(x) {
 570     // is x a String or a character?
 571     if(x.length>1) {
 572       // remove negative sign
 573       x=Math.abs(x)+"";
 574       for(j=0;j<x.length;j++) {
 575         // call isNumeric recursively for each character
 576         number=isNumeric(x.substring(j,j+1));
 577         if(!number) return number;
 578       }
 579       return number;
 580     }
 581     else {
 582       // if x is number return true
 583       if(numbers.indexOf(x)>=0) return true;
 584       return false;
 585     }
 586   }
 587
 588
 589 function hideOrShowFeeds(doc, hide) {
 590
 591         if (!doc.styleSheets) return;
 592
 593         var css_rules = doc.styleSheets[0].cssRules;
 594
 595         if (!css_rules || !css_rules.length) return;
 596
 597         for (i = 0; i < css_rules.length; i++) {
 598                 var rule = css_rules[i];
 599
 600                 if (rule.selectorText == "ul.feedList li.feed") {
 601                         if (!hide) {
 602                                 rule.style.display = "block";
 603                         } else {
 604                                 rule.style.display = "none";
 605                         }
 606                 }
 607
 608         }
 609
 610 }
 611
 612 function selectTableRow(r, do_select) {
 613         r.className = r.className.replace("Selected", "");
 614
 615         if (do_select) {
 616                 r.className = r.className + "Selected";
 617         }
 618 }
 619
 620 function selectTableRowById(elem_id, check_id, do_select) {
 621
 622         try {
 623
 624                 var row = document.getElementById(elem_id);
 625
 626                 if (row) {
 627                         selectTableRow(row, do_select);
 628                 }
 629
 630                 var check = document.getElementById(check_id);
 631
 632                 if (check) {
 633                         check.checked = do_select;
 634                 }
 635         } catch (e) {
 636                 exception_error("selectTableRowById", e);
 637         }
 638 }
 639
 640 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
 641         classcheck, reset_others) {
 642
 643         var content = document.getElementById(content_id);
 644
 645         if (!content) {
 646                 alert("[selectTableRows] Element " + content_id + " not found.");
 647                 return;
 648         }
 649
 650         for (i = 0; i < content.rows.length; i++) {
 651                 if (!classcheck || content.rows[i].className.match(classcheck)) {
 652
 653                         if (content.rows[i].id.match(prefix)) {
 654                                 selectTableRow(content.rows[i], do_select);
 655
 656                                 var row_id = content.rows[i].id.replace(prefix, "");
 657                                 var check = document.getElementById(check_prefix + row_id);
 658
 659                                 if (check) {
 660                                         check.checked = do_select;
 661                                 }
 662                         } else if (reset_others) {
 663                                 selectTableRow(content.rows[i], false);
 664
 665                                 var row_id = content.rows[i].id.replace(prefix, "");
 666                                 var check = document.getElementById(check_prefix + row_id);
 667
 668                                 if (check) {
 669                                         check.checked = false;
 670                                 }
 671
 672                         }
 673                 } else if (reset_others) {
 674                         selectTableRow(content.rows[i], false);
 675
 676                         var row_id = content.rows[i].id.replace(prefix, "");
 677                         var check = document.getElementById(check_prefix + row_id);
 678
 679                         if (check) {
 680                                 check.checked = false;
 681                         }
 682
 683                 }
 684         }
 685 }
 686
 687 function getSelectedTableRowIds(content_id, prefix) {
 688
 689         var content = document.getElementById(content_id);
 690
 691         if (!content) {
 692                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
 693                 return;
 694         }
 695
 696         var sel_rows = new Array();
 697
 698         for (i = 0; i < content.rows.length; i++) {
 699                 if (content.rows[i].id.match(prefix) &&
 700                                 content.rows[i].className.match("Selected")) {
 701
 702                         var row_id = content.rows[i].id.replace(prefix + "-", "");
 703                         sel_rows.push(row_id);
 704                 }
 705         }
 706
 707         return sel_rows;
 708
 709 }
 710
 711 function toggleSelectRowById(sender, id) {
 712         var row = document.getElementById(id);
 713
 714         if (sender.checked) {
 715                 if (!row.className.match("Selected")) {
 716                         row.className = row.className + "Selected";
 717                 }
 718         } else {
 719                 if (row.className.match("Selected")) {
 720                         row.className = row.className.replace("Selected", "");
 721                 }
 722         }
 723 }
 724
 725 function toggleSelectListRow(sender) {
 726         var parent_row = sender.parentNode;
 727
 728         if (sender.checked) {
 729                 if (!parent_row.className.match("Selected")) {
 730                         parent_row.className = parent_row.className + "Selected";
 731                 }
 732         } else {
 733                 if (parent_row.className.match("Selected")) {
 734                         parent_row.className = parent_row.className.replace("Selected", "");
 735                 }
 736         }
 737 }
 738
 739
 740 function toggleSelectRow(sender) {
 741         var parent_row = sender.parentNode.parentNode;
 742
 743         if (sender.checked) {
 744                 if (!parent_row.className.match("Selected")) {
 745                         parent_row.className = parent_row.className + "Selected";
 746                 }
 747         } else {
 748                 if (parent_row.className.match("Selected")) {
 749                         parent_row.className = parent_row.className.replace("Selected", "");
 750                 }
 751         }
 752 }
 753
 754 function openExternalUrl(url) {
 755         var w = window.open(url);
 756 }
 757
 758 function getRelativeFeedId(list, id, direction, unread_only) {
 759         if (!id) {
 760                 if (direction == "next") {
 761                         for (i = 0; i < list.childNodes.length; i++) {
 762                                 var child = list.childNodes[i];
 763                                 if (child.id && child.id == "feedCatHolder") {
 764                                         if (child.lastChild) {
 765                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 766                                                 if (cr) return cr;
 767                                         }
 768                                 } else if (child.id && child.id.match("FEEDR-")) {
 769                                         return child.id.replace('FEEDR-', '');
 770                                 }
 771                         }
 772                 }
 773
 774                 // FIXME select last feed doesn't work when only unread feeds are visible
 775
 776                 if (direction == "prev") {
 777                         for (i = list.childNodes.length-1; i >= 0; i--) {
 778                                 var child = list.childNodes[i];
 779                                 if (child.id == "feedCatHolder") {
 780                                         if (child.firstChild) {
 781                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 782                                                 if (cr) return cr;
 783                                         }
 784                                 } else if (child.id.match("FEEDR-")) {
 785
 786                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 787                                                 if (child.className != "feed") {
 788                                                         alert(child.className);
 789                                                         return child.id.replace('FEEDR-', '');
 790                                                 }
 791                                         } else {
 792                                                         return child.id.replace('FEEDR-', '');
 793                                         }
 794                                 }
 795                         }
 796                 }
 797         } else {
 798
 799                 var feed = list.ownerDocument.getElementById("FEEDR-" + getActiveFeedId());
 800
 801                 if (getCookie("ttrss_vf_hreadf") == 1) {
 802                         unread_only = true;
 803                 }
 804
 805                 if (direction == "next") {
 806
 807                         var e = feed;
 808
 809                         while (e) {
 810
 811                                 if (e.nextSibling) {
 812
 813                                         e = e.nextSibling;
 814
 815                                 } else if (e.parentNode.parentNode.nextSibling) {
 816
 817                                         var this_cat = e.parentNode.parentNode;
 818
 819                                         e = false;
 820
 821                                         if (this_cat && this_cat.nextSibling) {
 822                                                 while (!e && this_cat.nextSibling) {
 823                                                         this_cat = this_cat.nextSibling;
 824                                                         if (this_cat.id == "feedCatHolder") {
 825                                                                 e = this_cat.firstChild.firstChild;
 826                                                         }
 827                                                 }
 828                                         }
 829
 830                                 } else {
 831                                         e = false;
 832                            }
 833
 834                                 if (e) {
 835                                         if (!unread_only || (unread_only && e.className != "feed" &&
 836                                                         e.className != "error"))        {
 837                                                 return e.id.replace("FEEDR-", "");
 838                                         }
 839                                 }
 840                         }
 841
 842                 } else if (direction == "prev") {
 843
 844                         var e = feed;
 845
 846                         while (e) {
 847
 848                                 if (e.previousSibling) {
 849
 850                                         e = e.previousSibling;
 851
 852                                 } else if (e.parentNode.parentNode.previousSibling) {
 853
 854                                         var this_cat = e.parentNode.parentNode;
 855
 856                                         e = false;
 857
 858                                         if (this_cat && this_cat.previousSibling) {
 859                                                 while (!e && this_cat.previousSibling) {
 860                                                         this_cat = this_cat.previousSibling;
 861                                                         if (this_cat.id == "feedCatHolder") {
 862                                                                 e = this_cat.firstChild.lastChild;
 863                                                         }
 864                                                 }
 865                                         }
 866
 867                                 } else {
 868                                         e = false;
 869                            }
 870
 871                                 if (e) {
 872                                         if (!unread_only || (unread_only && e.className != "feed" &&
 873                                                         e.className != "error"))        {
 874                                                 return e.id.replace("FEEDR-", "");
 875                                         }
 876                                 }
 877                         }
 878                 }
 879         }
 880 }
 881
 882 function showBlockElement(id) {
 883         var elem = document.getElementById(id);
 884
 885         if (elem) {
 886                 elem.style.display = "block";
 887         } else {
 888                 alert("[showBlockElement] can't find element with id " + id);
 889         }
 890 }
 891
 892 function hideParentElement(e) {
 893         e.parentNode.style.display = "none";
 894 }
 895
 896 function dropboxSelect(e, v) {
 897         for (i = 0; i < e.length; i++) {
 898                 if (e[i].value == v) {
 899                         e.selectedIndex = i;
 900                         break;
 901                 }
 902         }
 903 }
 904
 905 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
 906 // bugfixed just a little bit :-)
 907 function getURLParam(strParamName){
 908   var strReturn = "";
 909   var strHref = window.location.href;
 910
 911   if (strHref.indexOf("#") == strHref.length-1) {
 912                 strHref = strHref.substring(0, strHref.length-1);
 913   }
 914
 915   if ( strHref.indexOf("?") > -1 ){
 916     var strQueryString = strHref.substr(strHref.indexOf("?"));
 917     var aQueryString = strQueryString.split("&");
 918     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
 919       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
 920         var aParam = aQueryString[iParam].split("=");
 921         strReturn = aParam[1];
 922         break;
 923       }
 924     }
 925   }
 926   return strReturn;
 927 }
 928
 929 function leading_zero(p) {
 930         var s = String(p);
 931         if (s.length == 1) s = "0" + s;
 932         return s;
 933 }
 934
 935 function closeInfoBox(cleanup) {
 936         var box = document.getElementById('infoBox');
 937         var shadow = document.getElementById('infoBoxShadow');
 938
 939         if (shadow) {
 940                 shadow.style.display = "none";
 941         } else if (box) {
 942                 box.style.display = "none";
 943         }
 944
 945         if (cleanup) box.innerHTML = "&nbsp;";
 946
 947         enableHotkeys();
 948
 949 }
 950
 951
 952 function displayDlg(id, param) {
 953
 954         if (!xmlhttp_ready(xmlhttp)) {
 955                 printLockingError();
 956                 return
 957         }
 958
 959         notify("");
 960
 961         xmlhttp.open("GET", "backend.php?op=dlg&id=" +
 962                 param_escape(id) + "&param=" + param_escape(param), true);
 963         xmlhttp.onreadystatechange=infobox_callback;
 964         xmlhttp.send(null);
 965
 966         disableHotkeys();
 967
 968 }
 969
 970 function infobox_submit_callback() {
 971         if (xmlhttp.readyState == 4) {
 972                 closeInfoBox();
 973
 974                 // called from prefs, reload tab
 975                 if (active_tab) {
 976                         selectTab(active_tab, false);
 977                 }
 978
 979                 notify(xmlhttp.responseText);
 980
 981         }
 982 }
 983
 984 function infobox_callback() {
 985         if (xmlhttp.readyState == 4) {
 986                 var box = document.getElementById('infoBox');
 987                 var shadow = document.getElementById('infoBoxShadow');
 988                 if (box) {
 989                         box.innerHTML=xmlhttp.responseText;
 990                         if (shadow) {
 991                                 shadow.style.display = "block";
 992                         } else {
 993                                 box.style.display = "block";
 994                         }
 995                 }
 996         }
 997 }
 998
 999 function qaddFilter() {
1000
1001         if (!xmlhttp_ready(xmlhttp)) {
1002                 printLockingError();
1003                 return
1004         }
1005
1006         var query = Form.serialize("filter_add_form");
1007
1008         xmlhttp.open("GET", "backend.php?" + query, true);
1009         xmlhttp.onreadystatechange=infobox_submit_callback;
1010         xmlhttp.send(null);
1011
1012         return true;
1013 }
1014
1015 function toggleSubmitNotEmpty(e, submit_id) {
1016         try {
1017                 document.getElementById(submit_id).disabled = (e.value == "")
1018         } catch (e) {
1019                 exception_error("toggleSubmitNotEmpty", e);
1020         }
1021 }
1022
1023 function isValidURL(s) {
1024         return s.match("http://") != null || s.match("https://") != null;
1025 }
1026
1027 function qafAdd() {
1028
1029         if (!xmlhttp_ready(xmlhttp)) {
1030                 printLockingError();
1031                 return
1032         }
1033
1034         notify("Adding feed...");
1035
1036         closeInfoBox();
1037
1038         var feeds_doc = getFeedsContext().document;
1039
1040         feeds_doc.location.href = "backend.php?op=error&msg=Loading,%20please wait...";
1041
1042         var query = Form.serialize("feed_add_form");
1043
1044         xmlhttp.open("GET", "backend.php?" + query, true);
1045         xmlhttp.onreadystatechange=dlg_frefresh_callback;
1046         xmlhttp.send(null);
1047 }
1048
1049 function filterCR(e)
1050 {
1051      var key;
1052
1053      if(window.event)
1054           key = window.event.keyCode;     //IE
1055      else
1056           key = e.which;     //firefox
1057
1058      if(key == 13)
1059           return false;
1060      else
1061           return true;
1062 }
1063
1064 function getMainContext() {
1065         if (parent.window != window) {
1066                 return parent.window;
1067         } else {
1068                 return this.window;
1069         }
1070 }
1071
1072 function getFeedsContext() {
1073         try {
1074                 return getMainContext().frames["feeds-frame"];
1075         } catch (e) {
1076                 exception_error("getFeedsContext", e);
1077         }
1078 }
1079
1080 function debug(msg) {
1081         var ctx = getMainContext();
1082
1083         var c = ctx.document.getElementById('debug_output');
1084         if (c && c.style.display == "block") {
1085                 while (c.lastChild != 'undefined' && c.childNodes.length > 20) {
1086                         c.removeChild(c.lastChild);
1087                 }
1088
1089                 var d = new Date();
1090                 var ts = leading_zero(d.getHours()) + ":" + leading_zero(d.getMinutes()) +
1091                         ":" + leading_zero(d.getSeconds());
1092                 c.innerHTML = "<li>[" + ts + "] " + msg + "</li>" + c.innerHTML;
1093         }
1094 }
1095
1096 function getInitParam(key) {
1097         return getMainContext().init_params[key];
1098 }
1099
1100 // TODO: batch mode
1101 function storeInitParam(key, value) {
1102         try {
1103                 getMainContext().init_params[key] = value;
1104                 new Ajax.Request("backend.php?op=rpc&subop=storeParam&key=" +
1105                         param_escape(key) + "&value=" + param_escape(value));
1106         } catch (e) {
1107                 exception_error("storeInitParam", e);
1108         }
1109 }