functions.js

   1 var hotkeys_enabled = true;
   2
   3 var xmlhttp_rpc = Ajax.getTransport();
   4
   5 function browser_has_opacity() {
   6         return navigator.userAgent.match("Gecko") != null ||
   7                 navigator.userAgent.match("Opera") != null;
   8 }
   9
  10 function exception_error(location, e, silent) {
  11         var msg;
  12
  13         if (e.fileName) {
  14                 var base_fname = e.fileName.substring(e.fileName.lastIndexOf("/") + 1);
  15
  16                 msg = "Exception: " + e.name + ", " + e.message +
  17                         "\nFunction: " + location + "()" +
  18                         "\nLocation: " + base_fname + ":" + e.lineNumber;
  19
  20         } else {
  21                 msg = "Exception: " + e + "\nFunction: " + location + "()";
  22         }
  23
  24         debug("<b>EXCEPTION: " + msg + "</b>");
  25
  26         if (!silent) {
  27                 alert(msg);
  28         }
  29 }
  30
  31 function disableHotkeys() {
  32         hotkeys_enabled = false;
  33 }
  34
  35 function enableHotkeys() {
  36         hotkeys_enabled = true;
  37 }
  38
  39 function xmlhttp_ready(obj) {
  40         return obj.readyState == 4 || obj.readyState == 0 || !obj.readyState;
  41 }
  42
  43 function notify_callback() {
  44         var container = document.getElementById('notify');
  45         if (xmlhttp.readyState == 4) {
  46                 container.innerHTML=xmlhttp.responseText;
  47         }
  48 }
  49
  50 function rpc_notify_callback() {
  51         var container = 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 function hotkey_handler(e) {
 155
 156         try {
 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                 var m_ctx = getMainContext();
 169                 var f_ctx = getFeedsContext();
 170                 var h_ctx = getHeadlinesContext();
 171
 172                 if (keycode == 82) { // r
 173                         return m_ctx.scheduleFeedUpdate(true);
 174                 }
 175
 176                 if (keycode == 83) { // r
 177                         return m_ctx.displayDlg("search", getActiveFeedId());
 178                 }
 179
 180                 if (keycode == 85) { // u
 181                         if (getActiveFeedId()) {
 182                                 return f_ctx.viewfeed(getActiveFeedId(), "ForceUpdate");
 183                         }
 184                 }
 185
 186                 if (keycode == 65) { // a
 187                         return m_ctx.toggleDispRead();
 188                 }
 189
 190                 var f_doc = m_ctx.frames["feeds-frame"].document;
 191                 var feedlist = f_doc.getElementById('feedList');
 192
 193                 if (keycode == 74) { // j
 194                         var feed = getActiveFeedId();
 195                         var new_feed = getRelativeFeedId(feedlist, feed, 'prev');
 196                         if (new_feed) viewfeed(new_feed, '');
 197                 }
 198
 199                 if (keycode == 75) { // k
 200                         var feed = getActiveFeedId();
 201                         var new_feed = getRelativeFeedId(feedlist, feed, 'next');
 202                         if (new_feed) viewfeed(new_feed, '');
 203                 }
 204
 205                 if (keycode == 78 || keycode == 40) { // n, down
 206                         if (typeof h_ctx.moveToPost != 'undefined') {
 207                                 return h_ctx.moveToPost('next');
 208                         }
 209                 }
 210
 211                 if (keycode == 80 || keycode == 38) { // p, up
 212                         if (typeof h_ctx.moveToPost != 'undefined') {
 213                                 return h_ctx.moveToPost('prev');
 214                         }
 215                 }
 216
 217                 if (typeof localHotkeyHandler != 'undefined') {
 218                         try {
 219                                 localHotkeyHandler(keycode);
 220                         } catch (e) {
 221                                 exception_error("hotkey_handler, local:", e);
 222                         }
 223                 }
 224         } catch (e) {
 225                 exception_error("hotkey_handler", e);
 226         }
 227 }
 228
 229 function cleanSelectedList(element) {
 230         var content = document.getElementById(element);
 231
 232         if (!document.getElementById("feedCatHolder")) {
 233                 for (i = 0; i < content.childNodes.length; i++) {
 234                         var child = content.childNodes[i];
 235                         try {
 236                                 child.className = child.className.replace("Selected", "");
 237                         } catch (e) {
 238                                 //
 239                         }
 240                 }
 241         } else {
 242                 for (i = 0; i < content.childNodes.length; i++) {
 243                         var child = content.childNodes[i];
 244                         if (child.id == "feedCatHolder") {
 245                                 parent.debug(child.id);
 246                                 var fcat = child.lastChild;
 247                                 for (j = 0; j < fcat.childNodes.length; j++) {
 248                                         var feed = fcat.childNodes[j];
 249                                         feed.className = feed.className.replace("Selected", "");
 250                                 }
 251                         }
 252                 }
 253         }
 254 }
 255
 256
 257 function cleanSelected(element) {
 258         var content = document.getElementById(element);
 259
 260         for (i = 0; i < content.rows.length; i++) {
 261                 content.rows[i].className = content.rows[i].className.replace("Selected", "");
 262         }
 263 }
 264
 265 function getVisibleUnreadHeadlines() {
 266         var content = document.getElementById("headlinesList");
 267
 268         var rows = new Array();
 269
 270         for (i = 0; i < content.rows.length; i++) {
 271                 var row_id = content.rows[i].id.replace("RROW-", "");
 272                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 273                                 rows.push(row_id);
 274                 }
 275         }
 276         return rows;
 277 }
 278
 279 function getVisibleHeadlineIds() {
 280
 281         var content = document.getElementById("headlinesList");
 282
 283         var rows = new Array();
 284
 285         for (i = 0; i < content.rows.length; i++) {
 286                 var row_id = content.rows[i].id.replace("RROW-", "");
 287                 if (row_id.length > 0) {
 288                                 rows.push(row_id);
 289                 }
 290         }
 291         return rows;
 292 }
 293
 294 function getFirstVisibleHeadlineId() {
 295         var rows = getVisibleHeadlineIds();
 296         return rows[0];
 297 }
 298
 299 function getLastVisibleHeadlineId() {
 300         var rows = getVisibleHeadlineIds();
 301         return rows[rows.length-1];
 302 }
 303
 304 function markHeadline(id) {
 305         var row = document.getElementById("RROW-" + id);
 306         if (row) {
 307                 var is_active = false;
 308
 309                 if (row.className.match("Active")) {
 310                         is_active = true;
 311                 }
 312                 row.className = row.className.replace("Selected", "");
 313                 row.className = row.className.replace("Active", "");
 314                 row.className = row.className.replace("Insensitive", "");
 315
 316                 if (is_active) {
 317                         row.className = row.className = "Active";
 318                 }
 319
 320                 var check = document.getElementById("RCHK-" + id);
 321
 322                 if (check) {
 323                         check.checked = true;
 324                 }
 325
 326                 row.className = row.className + "Selected";
 327
 328         }
 329 }
 330
 331 function getFeedIds() {
 332         var content = document.getElementById("feedsList");
 333
 334         var rows = new Array();
 335
 336         for (i = 0; i < content.rows.length; i++) {
 337                 var id = content.rows[i].id.replace("FEEDR-", "");
 338                 if (id.length > 0) {
 339                         rows.push(id);
 340                 }
 341         }
 342
 343         return rows;
 344 }
 345
 346 function setCookie(name, value, lifetime, path, domain, secure) {
 347
 348         var d = false;
 349
 350         if (lifetime) {
 351                 d = new Date();
 352                 d.setTime(lifetime * 1000);
 353         }
 354
 355         int_setCookie(name, value, d, path, domain, secure);
 356
 357 }
 358
 359 function int_setCookie(name, value, expires, path, domain, secure) {
 360         document.cookie= name + "=" + escape(value) +
 361                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 362                 ((path) ? "; path=" + path : "") +
 363                 ((domain) ? "; domain=" + domain : "") +
 364                 ((secure) ? "; secure" : "");
 365 }
 366
 367 function delCookie(name, path, domain) {
 368         if (getCookie(name)) {
 369                 document.cookie = name + "=" +
 370                 ((path) ? ";path=" + path : "") +
 371                 ((domain) ? ";domain=" + domain : "" ) +
 372                 ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
 373         }
 374 }
 375
 376
 377 function getCookie(name) {
 378
 379         var dc = document.cookie;
 380         var prefix = name + "=";
 381         var begin = dc.indexOf("; " + prefix);
 382         if (begin == -1) {
 383             begin = dc.indexOf(prefix);
 384             if (begin != 0) return null;
 385         }
 386         else {
 387             begin += 2;
 388         }
 389         var end = document.cookie.indexOf(";", begin);
 390         if (end == -1) {
 391             end = dc.length;
 392         }
 393         return unescape(dc.substring(begin + prefix.length, end));
 394 }
 395
 396 function disableContainerChildren(id, disable, doc) {
 397
 398         if (!doc) doc = document;
 399
 400         var container = doc.getElementById(id);
 401
 402         if (!container) {
 403                 //alert("disableContainerChildren: element " + id + " not found");
 404                 return;
 405         }
 406
 407         for (var i = 0; i < container.childNodes.length; i++) {
 408                 var child = container.childNodes[i];
 409
 410                 try {
 411                         child.disabled = disable;
 412                 } catch (E) {
 413
 414                 }
 415
 416                 if (disable) {
 417                         if (child.className && child.className.match("button")) {
 418                                 child.className = "disabledButton";
 419                         }
 420                 } else {
 421                         if (child.className && child.className.match("disabledButton")) {
 422                                 child.className = "button";
 423                         }
 424                 }
 425         }
 426
 427 }
 428
 429 function gotoPreferences() {
 430         document.location.href = "prefs.php";
 431 }
 432
 433 function gotoMain() {
 434         document.location.href = "tt-rss.php";
 435 }
 436
 437 function gotoExportOpml() {
 438         document.location.href = "opml.php?op=Export";
 439 }
 440
 441 function getActiveFeedId() {
 442 //      return getCookie("ttrss_vf_actfeed");
 443         try {
 444                 debug("gAFID: " + getMainContext().active_feed_id);
 445                 return getMainContext().active_feed_id;
 446         } catch (e) {
 447                 exception_error("getActiveFeedId", e);
 448         }
 449 }
 450
 451 function activeFeedIsCat() {
 452         return getMainContext().active_feed_is_cat;
 453 }
 454
 455 function setActiveFeedId(id) {
 456 //      return setCookie("ttrss_vf_actfeed", id);
 457         try {
 458                 debug("sAFID(" + id + ")");
 459                 getMainContext().active_feed_id = id;
 460         } catch (e) {
 461                 exception_error("setActiveFeedId", e);
 462         }
 463 }
 464
 465 function parse_counters(reply, scheduled_call) {
 466         try {
 467                 var f_document = getFeedsContext().document;
 468                 var title_obj = getMainContext();
 469
 470                 var feeds_found = 0;
 471
 472                 if (reply.firstChild && reply.firstChild.firstChild) {
 473                         debug("<b>wrong element passed to parse_counters, adjusting.</b>");
 474                         reply = reply.firstChild;
 475                 }
 476
 477                 debug("F_DOC: " + f_document + ", T_OBJ: " + title_obj);
 478
 479                 for (var l = 0; l < reply.childNodes.length; l++) {
 480                         if (!reply.childNodes[l] ||
 481                                 typeof(reply.childNodes[l].getAttribute) == "undefined") {
 482                                 // where did this come from?
 483                                 continue;
 484                         }
 485
 486                         var id = reply.childNodes[l].getAttribute("id");
 487                         var t = reply.childNodes[l].getAttribute("type");
 488                         var ctr = reply.childNodes[l].getAttribute("counter");
 489                         var error = reply.childNodes[l].getAttribute("error");
 490                         var has_img = reply.childNodes[l].getAttribute("hi");
 491                         var updated = reply.childNodes[l].getAttribute("updated");
 492
 493                         if (id == "global-unread") {
 494                                 title_obj.global_unread = ctr;
 495                                 title_obj.updateTitle();
 496                                 continue;
 497                         }
 498
 499                         if (id == "subscribed-feeds") {
 500                                 feeds_found = ctr;
 501                                 continue;
 502                         }
 503
 504                         if (t == "category") {
 505                                 var catctr = f_document.getElementById("FCATCTR-" + id);
 506                                 if (catctr) {
 507                                         catctr.innerHTML = "(" + ctr + " unread)";
 508                                 }
 509                                 continue;
 510                         }
 511
 512                         var feedctr = f_document.getElementById("FEEDCTR-" + id);
 513                         var feedu = f_document.getElementById("FEEDU-" + id);
 514                         var feedr = f_document.getElementById("FEEDR-" + id);
 515                         var feed_img = f_document.getElementById("FIMG-" + id);
 516                         var feedlink = f_document.getElementById("FEEDL-" + id);
 517                         var feedupd = f_document.getElementById("FLUPD-" + id);
 518
 519                         if (updated && feedlink) {
 520                                 if (error) {
 521                                         feedlink.title = "Error: " + error + " (" + updated + ")";
 522                                 } else {
 523                                         feedlink.title = "Updated: " + updated;
 524                                 }
 525                         }
 526
 527                         if (updated && feedupd) {
 528                                 if (error) {
 529                                         feedupd.innerHTML = updated + " (Error)";
 530                                 } else {
 531                                         feedupd.innerHTML = updated;
 532                                 }
 533                         }
 534
 535                         if (feedctr && feedu && feedr) {
 536
 537                                 if (feedu.innerHTML != ctr && id == getActiveFeedId() && scheduled_call) {
 538                                         var hf = title_obj.parent.frames["headlines-frame"];
 539                                         hf.location.reload(true);
 540                                 }
 541
 542                                 feedu.innerHTML = ctr;
 543
 544                                 if (error) {
 545                                         feedr.className = feedr.className.replace("feed", "error");
 546                                 } else if (id > 0) {
 547                                         feedr.className = feedr.className.replace("error", "feed");
 548                                 }
 549
 550                                 if (ctr > 0) {
 551                                         feedctr.className = "odd";
 552                                         if (!feedr.className.match("Unread")) {
 553                                                 var is_selected = feedr.className.match("Selected");
 554
 555                                                 feedr.className = feedr.className.replace("Selected", "");
 556                                                 feedr.className = feedr.className.replace("Unread", "");
 557
 558                                                 feedr.className = feedr.className + "Unread";
 559
 560                                                 if (is_selected) {
 561                                                         feedr.className = feedr.className + "Selected";
 562                                                 }
 563
 564                                         }
 565                                 } else {
 566                                         feedctr.className = "invisible";
 567                                         feedr.className = feedr.className.replace("Unread", "");
 568                                 }
 569                         }
 570                 }
 571
 572                 var feeds_stored = getMainContext().number_of_feeds;
 573
 574                 debug("Feed counters, C: " + feeds_found + ", S:" + feeds_stored);
 575
 576                 if (feeds_stored != feeds_found) {
 577                         getMainContext().number_of_feeds = feeds_found;
 578
 579                         if (feeds_stored != 0) {
 580                                 debug("Subscribed feed number changed, refreshing feedlist");
 581                                 updateFeedList();
 582                         }
 583                 }
 584
 585         } catch (e) {
 586                 exception_error("parse_counters", e);
 587         }
 588 }
 589
 590 function all_counters_callback() {
 591         if (xmlhttp_rpc.readyState == 4) {
 592                 try {
 593                         if (!xmlhttp_rpc.responseXML || !xmlhttp_rpc.responseXML.firstChild) {
 594                                 debug("[all_counters_callback] backend did not return valid XML");
 595                                 return;
 596                         }
 597
 598                         debug("in all_counters_callback");
 599
 600                         var reply = xmlhttp_rpc.responseXML.firstChild;
 601
 602                         var counters = reply.firstChild;
 603
 604                         parse_counters(counters);
 605
 606                         var runtime = counters.nextSibling;
 607
 608                         if (runtime) {
 609                                 getMainContext().parse_runtime_info(runtime);
 610                         }
 611
 612                         if (getInitParam("feeds_sort_by_unread") == 1) {
 613                                 resort_feedlist();
 614                         }
 615
 616                         hideOrShowFeeds(document, getInitParam("hide_read_feeds") == 1);
 617
 618                 } catch (e) {
 619                         exception_error("all_counters_callback", e);
 620                 }
 621         }
 622 }
 623
 624 function get_feed_entry_unread(doc, elem) {
 625
 626         var id = elem.id.replace("FEEDR-", "");
 627
 628         if (id <= 0) {
 629                 return -1;
 630         }
 631
 632         try {
 633                 return parseInt(doc.getElementById("FEEDU-" + id).innerHTML);
 634         } catch (e) {
 635                 return -1;
 636         }
 637 }
 638
 639 function resort_category(doc, node) {
 640         debug("resort_category: " + node);
 641
 642         if (node.hasChildNodes() && node.firstChild.nextSibling != false) {
 643                 for (i = 0; i < node.childNodes.length; i++) {
 644                         if (node.childNodes[i].nodeName != "LI") { continue; }
 645
 646                         if (get_feed_entry_unread(doc, node.childNodes[i]) < 0) {
 647                                 continue;
 648                         }
 649
 650                         for (j = i+1; j < node.childNodes.length; j++) {
 651                                 if (node.childNodes[j].nodeName != "LI") { continue; }
 652
 653                                 var tmp_val = get_feed_entry_unread(doc, node.childNodes[i]);
 654                                 var cur_val = get_feed_entry_unread(doc, node.childNodes[j]);
 655
 656                                 if (cur_val > tmp_val) {
 657                                         tempnode_i = node.childNodes[i].cloneNode(true);
 658                                         tempnode_j = node.childNodes[j].cloneNode(true);
 659                                         node.replaceChild(tempnode_i, node.childNodes[j]);
 660                                         node.replaceChild(tempnode_j, node.childNodes[i]);
 661                                 }
 662                         }
 663
 664                 }
 665         }
 666
 667 }
 668
 669 function resort_feedlist() {
 670         debug("resort_feedlist");
 671
 672         var fd = getFeedsContext().document;
 673
 674         if (fd.getElementById("feedCatHolder")) {
 675
 676                 var feeds = fd.getElementById("feedList");
 677                 var child = feeds.firstChild;
 678
 679                 while (child) {
 680
 681                         if (child.id == "feedCatHolder") {
 682                                 resort_category(fd, child.firstChild);
 683                         }
 684
 685                         child = child.nextSibling;
 686                 }
 687
 688         } else {
 689                 resort_category(fd, fd.getElementById("feedList"));
 690         }
 691 }
 692
 693 function update_all_counters(feed) {
 694         if (xmlhttp_ready(xmlhttp_rpc)) {
 695                 var query = "backend.php?op=rpc&subop=getAllCounters";
 696
 697                 if (feed > 0) {
 698                         query = query + "&aid=" + feed;
 699                 }
 700
 701                 xmlhttp_rpc.open("GET", query, true);
 702                 xmlhttp_rpc.onreadystatechange=all_counters_callback;
 703                 xmlhttp_rpc.send(null);
 704         }
 705 }
 706
 707 function popupHelp(tid) {
 708         var w = window.open("backend.php?op=help&tid=" + tid,
 709                 "Popup Help",
 710                 "menubar=no,location=no,resizable=yes,scrollbars=yes,status=no");
 711 }
 712
 713 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 714   * * @author Sundar Dorai-Raj
 715   * * Email: sdoraira@vt.edu
 716   * * This program is free software; you can redistribute it and/or
 717   * * modify it under the terms of the GNU General Public License
 718   * * as published by the Free Software Foundation; either version 2
 719   * * of the License, or (at your option) any later version,
 720   * * provided that any use properly credits the author.
 721   * * This program is distributed in the hope that it will be useful,
 722   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 723   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 724   * * GNU General Public License for more details at http://www.gnu.org * * */
 725
 726   var numbers=".0123456789";
 727   function isNumeric(x) {
 728     // is x a String or a character?
 729     if(x.length>1) {
 730       // remove negative sign
 731       x=Math.abs(x)+"";
 732       for(j=0;j<x.length;j++) {
 733         // call isNumeric recursively for each character
 734         number=isNumeric(x.substring(j,j+1));
 735         if(!number) return number;
 736       }
 737       return number;
 738     }
 739     else {
 740       // if x is number return true
 741       if(numbers.indexOf(x)>=0) return true;
 742       return false;
 743     }
 744   }
 745
 746
 747 function hideOrShowFeeds(doc, hide) {
 748
 749         var fd = getFeedsContext().document;
 750
 751         var list = fd.getElementById("feedList");
 752
 753         if (fd.getElementById("feedCatHolder")) {
 754
 755                 var feeds = fd.getElementById("feedList");
 756                 var child = feeds.firstChild;
 757
 758                 while (child) {
 759
 760                         if (child.id == "feedCatHolder") {
 761                                 hideOrShowFeedsCategory(fd, child.firstChild, hide, child.previousSibling);
 762                         }
 763
 764                         child = child.nextSibling;
 765                 }
 766
 767         } else {
 768                 hideOrShowFeedsCategory(fd, fd.getElementById("feedList"), hide);
 769         }
 770 }
 771
 772 function hideOrShowFeedsCategory(doc, node, hide, cat_node) {
 773
 774 //      debug("hideOrShowFeedsCategory: " + node + " (" + hide + ")");
 775
 776         var cat_unread = 0;
 777
 778         if (node.hasChildNodes() && node.firstChild.nextSibling != false) {
 779                 for (i = 0; i < node.childNodes.length; i++) {
 780                         if (node.childNodes[i].nodeName != "LI") { continue; }
 781
 782                         if (node.childNodes[i].style != undefined) {
 783
 784                                 var has_unread = (node.childNodes[i].className != "feed");
 785
 786         //                      debug(node.childNodes[i].id + " --> " + has_unread);
 787
 788                                 if (hide && !has_unread) {
 789                                         node.childNodes[i].style.display = "none";
 790                                 }
 791
 792                                 if (!hide) {
 793                                         node.childNodes[i].style.display = "list-item";
 794                                 }
 795
 796                                 if (has_unread) {
 797                                         cat_unread++;
 798                                 }
 799                         }
 800                 }
 801         }
 802
 803         if (cat_unread == 0) {
 804                 if (cat_node.style == undefined) {
 805                         debug("ERROR: supplied cat_node " + cat_node +
 806                                 " has no styles. WTF?");
 807                         return;
 808                 }
 809                 if (hide) {
 810                         cat_node.style.display = "none";
 811                 } else {
 812                         cat_node.style.display = "list-item";
 813                 }
 814         }
 815
 816 //      debug("unread for category: " + cat_unread);
 817 }
 818
 819 function selectTableRow(r, do_select) {
 820         r.className = r.className.replace("Selected", "");
 821
 822         if (do_select) {
 823                 r.className = r.className + "Selected";
 824         }
 825 }
 826
 827 function selectTableRowById(elem_id, check_id, do_select) {
 828
 829         try {
 830
 831                 var row = document.getElementById(elem_id);
 832
 833                 if (row) {
 834                         selectTableRow(row, do_select);
 835                 }
 836
 837                 var check = document.getElementById(check_id);
 838
 839                 if (check) {
 840                         check.checked = do_select;
 841                 }
 842         } catch (e) {
 843                 exception_error("selectTableRowById", e);
 844         }
 845 }
 846
 847 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
 848         classcheck, reset_others) {
 849
 850         var content = document.getElementById(content_id);
 851
 852         if (!content) {
 853                 alert("[selectTableRows] Element " + content_id + " not found.");
 854                 return;
 855         }
 856
 857         for (i = 0; i < content.rows.length; i++) {
 858                 if (!classcheck || content.rows[i].className.match(classcheck)) {
 859
 860                         if (content.rows[i].id.match(prefix)) {
 861                                 selectTableRow(content.rows[i], do_select);
 862
 863                                 var row_id = content.rows[i].id.replace(prefix, "");
 864                                 var check = document.getElementById(check_prefix + row_id);
 865
 866                                 if (check) {
 867                                         check.checked = do_select;
 868                                 }
 869                         } else if (reset_others) {
 870                                 selectTableRow(content.rows[i], false);
 871
 872                                 var row_id = content.rows[i].id.replace(prefix, "");
 873                                 var check = document.getElementById(check_prefix + row_id);
 874
 875                                 if (check) {
 876                                         check.checked = false;
 877                                 }
 878
 879                         }
 880                 } else if (reset_others) {
 881                         selectTableRow(content.rows[i], false);
 882
 883                         var row_id = content.rows[i].id.replace(prefix, "");
 884                         var check = document.getElementById(check_prefix + row_id);
 885
 886                         if (check) {
 887                                 check.checked = false;
 888                         }
 889
 890                 }
 891         }
 892 }
 893
 894 function getSelectedTableRowIds(content_id, prefix) {
 895
 896         var content = document.getElementById(content_id);
 897
 898         if (!content) {
 899                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
 900                 return;
 901         }
 902
 903         var sel_rows = new Array();
 904
 905         for (i = 0; i < content.rows.length; i++) {
 906                 if (content.rows[i].id.match(prefix) &&
 907                                 content.rows[i].className.match("Selected")) {
 908
 909                         var row_id = content.rows[i].id.replace(prefix + "-", "");
 910                         sel_rows.push(row_id);
 911                 }
 912         }
 913
 914         return sel_rows;
 915
 916 }
 917
 918 function toggleSelectRowById(sender, id) {
 919         var row = document.getElementById(id);
 920
 921         if (sender.checked) {
 922                 if (!row.className.match("Selected")) {
 923                         row.className = row.className + "Selected";
 924                 }
 925         } else {
 926                 if (row.className.match("Selected")) {
 927                         row.className = row.className.replace("Selected", "");
 928                 }
 929         }
 930 }
 931
 932 function toggleSelectListRow(sender) {
 933         var parent_row = sender.parentNode;
 934
 935         if (sender.checked) {
 936                 if (!parent_row.className.match("Selected")) {
 937                         parent_row.className = parent_row.className + "Selected";
 938                 }
 939         } else {
 940                 if (parent_row.className.match("Selected")) {
 941                         parent_row.className = parent_row.className.replace("Selected", "");
 942                 }
 943         }
 944 }
 945
 946
 947 function toggleSelectRow(sender) {
 948         var parent_row = sender.parentNode.parentNode;
 949
 950         if (sender.checked) {
 951                 if (!parent_row.className.match("Selected")) {
 952                         parent_row.className = parent_row.className + "Selected";
 953                 }
 954         } else {
 955                 if (parent_row.className.match("Selected")) {
 956                         parent_row.className = parent_row.className.replace("Selected", "");
 957                 }
 958         }
 959 }
 960
 961 function openExternalUrl(url) {
 962         var w = window.open(url);
 963 }
 964
 965 function getRelativeFeedId(list, id, direction, unread_only) {
 966         if (!id) {
 967                 if (direction == "next") {
 968                         for (i = 0; i < list.childNodes.length; i++) {
 969                                 var child = list.childNodes[i];
 970                                 if (child.id && child.id == "feedCatHolder") {
 971                                         if (child.lastChild) {
 972                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 973                                                 if (cr) return cr;
 974                                         }
 975                                 } else if (child.id && child.id.match("FEEDR-")) {
 976                                         return child.id.replace('FEEDR-', '');
 977                                 }
 978                         }
 979                 }
 980
 981                 // FIXME select last feed doesn't work when only unread feeds are visible
 982
 983                 if (direction == "prev") {
 984                         for (i = list.childNodes.length-1; i >= 0; i--) {
 985                                 var child = list.childNodes[i];
 986                                 if (child.id == "feedCatHolder") {
 987                                         if (child.firstChild) {
 988                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 989                                                 if (cr) return cr;
 990                                         }
 991                                 } else if (child.id.match("FEEDR-")) {
 992
 993                                         if (getInitParam("hide_read_feeds") == 1) {
 994                                                 if (child.className != "feed") {
 995                                                         alert(child.className);
 996                                                         return child.id.replace('FEEDR-', '');
 997                                                 }
 998                                         } else {
 999                                                         return child.id.replace('FEEDR-', '');
1000                                         }
1001                                 }
1002                         }
1003                 }
1004         } else {
1005
1006                 var feed = list.ownerDocument.getElementById("FEEDR-" + getActiveFeedId());
1007
1008                 if (getInitParam("hide_read_feeds") == 1) {
1009                         unread_only = true;
1010                 }
1011
1012                 if (direction == "next") {
1013
1014                         var e = feed;
1015
1016                         while (e) {
1017
1018                                 if (e.nextSibling) {
1019
1020                                         e = e.nextSibling;
1021
1022                                 } else if (e.parentNode.parentNode.nextSibling) {
1023
1024                                         var this_cat = e.parentNode.parentNode;
1025
1026                                         e = false;
1027
1028                                         if (this_cat && this_cat.nextSibling) {
1029                                                 while (!e && this_cat.nextSibling) {
1030                                                         this_cat = this_cat.nextSibling;
1031                                                         if (this_cat.id == "feedCatHolder") {
1032                                                                 e = this_cat.firstChild.firstChild;
1033                                                         }
1034                                                 }
1035                                         }
1036
1037                                 } else {
1038                                         e = false;
1039                            }
1040
1041                                 if (e) {
1042                                         if (!unread_only || (unread_only && e.className != "feed" &&
1043                                                         e.className != "error"))        {
1044                                                 return e.id.replace("FEEDR-", "");
1045                                         }
1046                                 }
1047                         }
1048
1049                 } else if (direction == "prev") {
1050
1051                         var e = feed;
1052
1053                         while (e) {
1054
1055                                 if (e.previousSibling) {
1056
1057                                         e = e.previousSibling;
1058
1059                                 } else if (e.parentNode.parentNode.previousSibling) {
1060
1061                                         var this_cat = e.parentNode.parentNode;
1062
1063                                         e = false;
1064
1065                                         if (this_cat && this_cat.previousSibling) {
1066                                                 while (!e && this_cat.previousSibling) {
1067                                                         this_cat = this_cat.previousSibling;
1068                                                         if (this_cat.id == "feedCatHolder") {
1069                                                                 e = this_cat.firstChild.lastChild;
1070                                                         }
1071                                                 }
1072                                         }
1073
1074                                 } else {
1075                                         e = false;
1076                            }
1077
1078                                 if (e) {
1079                                         if (!unread_only || (unread_only && e.className != "feed" &&
1080                                                         e.className != "error"))        {
1081                                                 return e.id.replace("FEEDR-", "");
1082                                         }
1083                                 }
1084                         }
1085                 }
1086         }
1087 }
1088
1089 function showBlockElement(id) {
1090         var elem = document.getElementById(id);
1091
1092         if (elem) {
1093                 elem.style.display = "block";
1094         } else {
1095                 alert("[showBlockElement] can't find element with id " + id);
1096         }
1097 }
1098
1099 function hideParentElement(e) {
1100         e.parentNode.style.display = "none";
1101 }
1102
1103 function dropboxSelect(e, v) {
1104         for (i = 0; i < e.length; i++) {
1105                 if (e[i].value == v) {
1106                         e.selectedIndex = i;
1107                         break;
1108                 }
1109         }
1110 }
1111
1112 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
1113 // bugfixed just a little bit :-)
1114 function getURLParam(strParamName){
1115   var strReturn = "";
1116   var strHref = window.location.href;
1117
1118   if (strHref.indexOf("#") == strHref.length-1) {
1119                 strHref = strHref.substring(0, strHref.length-1);
1120   }
1121
1122   if ( strHref.indexOf("?") > -1 ){
1123     var strQueryString = strHref.substr(strHref.indexOf("?"));
1124     var aQueryString = strQueryString.split("&");
1125     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
1126       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
1127         var aParam = aQueryString[iParam].split("=");
1128         strReturn = aParam[1];
1129         break;
1130       }
1131     }
1132   }
1133   return strReturn;
1134 }
1135
1136 function leading_zero(p) {
1137         var s = String(p);
1138         if (s.length == 1) s = "0" + s;
1139         return s;
1140 }
1141
1142 function closeInfoBox(cleanup) {
1143         var box = document.getElementById('infoBox');
1144         var shadow = document.getElementById('infoBoxShadow');
1145
1146         if (shadow) {
1147                 shadow.style.display = "none";
1148         } else if (box) {
1149                 box.style.display = "none";
1150         }
1151
1152         if (cleanup) box.innerHTML = "&nbsp;";
1153
1154         enableHotkeys();
1155
1156         return false;
1157 }
1158
1159
1160 function displayDlg(id, param) {
1161
1162         if (!xmlhttp_ready(xmlhttp)) {
1163                 printLockingError();
1164                 return
1165         }
1166
1167         notify("");
1168
1169         xmlhttp.open("GET", "backend.php?op=dlg&id=" +
1170                 param_escape(id) + "&param=" + param_escape(param), true);
1171         xmlhttp.onreadystatechange=infobox_callback;
1172         xmlhttp.send(null);
1173
1174         disableHotkeys();
1175
1176         return false;
1177 }
1178
1179 function infobox_submit_callback() {
1180         if (xmlhttp.readyState == 4) {
1181                 closeInfoBox();
1182
1183                 // called from prefs, reload tab
1184                 if (active_tab) {
1185                         selectTab(active_tab, false);
1186                 }
1187
1188                 notify(xmlhttp.responseText);
1189
1190         }
1191 }
1192
1193 function infobox_callback() {
1194         if (xmlhttp.readyState == 4) {
1195                 var box = document.getElementById('infoBox');
1196                 var shadow = document.getElementById('infoBoxShadow');
1197                 if (box) {
1198                         box.innerHTML=xmlhttp.responseText;
1199                         if (shadow) {
1200                                 shadow.style.display = "block";
1201                         } else {
1202                                 box.style.display = "block";
1203                         }
1204                 }
1205         }
1206 }
1207
1208 function qaddFilter() {
1209
1210         if (!xmlhttp_ready(xmlhttp)) {
1211                 printLockingError();
1212                 return
1213         }
1214
1215         var query = Form.serialize("filter_add_form");
1216
1217         xmlhttp.open("GET", "backend.php?" + query, true);
1218         xmlhttp.onreadystatechange=infobox_submit_callback;
1219         xmlhttp.send(null);
1220
1221         return true;
1222 }
1223
1224 function toggleSubmitNotEmpty(e, submit_id) {
1225         try {
1226                 document.getElementById(submit_id).disabled = (e.value == "")
1227         } catch (e) {
1228                 exception_error("toggleSubmitNotEmpty", e);
1229         }
1230 }
1231
1232 function isValidURL(s) {
1233         return s.match("http://") != null || s.match("https://") != null;
1234 }
1235
1236 function qafAdd() {
1237
1238         if (!xmlhttp_ready(xmlhttp)) {
1239                 printLockingError();
1240                 return
1241         }
1242
1243         notify("Adding feed...");
1244
1245         closeInfoBox();
1246
1247         var feeds_doc = getFeedsContext().document;
1248
1249         feeds_doc.location.href = "backend.php?op=error&msg=Loading,%20please wait...";
1250
1251         var query = Form.serialize("feed_add_form");
1252
1253         xmlhttp.open("GET", "backend.php?" + query, true);
1254         xmlhttp.onreadystatechange=dlg_frefresh_callback;
1255         xmlhttp.send(null);
1256 }
1257
1258 function filterCR(e)
1259 {
1260      var key;
1261
1262      if(window.event)
1263           key = window.event.keyCode;     //IE
1264      else
1265           key = e.which;     //firefox
1266
1267      if(key == 13)
1268           return false;
1269      else
1270           return true;
1271 }
1272
1273 function getMainContext() {
1274         if (parent.window != window) {
1275                 return parent.window;
1276         } else {
1277                 return this.window;
1278         }
1279 }
1280
1281 function getFeedsContext() {
1282         try {
1283                 return getMainContext().frames["feeds-frame"];
1284         } catch (e) {
1285                 exception_error("getFeedsContext", e);
1286         }
1287 }
1288
1289
1290 function getHeadlinesContext() {
1291         try {
1292                 return getMainContext().frames["headlines-frame"];
1293         } catch (e) {
1294                 exception_error("getHeadlinesContext", e);
1295         }
1296 }
1297
1298 var debug_last_class = "even";
1299
1300 function debug(msg) {
1301         var ctx = getMainContext();
1302
1303         if (ctx.debug_last_class == "even") {
1304                 ctx.debug_last_class = "odd";
1305         } else {
1306                 ctx.debug_last_class = "even";
1307         }
1308
1309         var c = ctx.document.getElementById('debug_output');
1310         if (c && c.style.display == "block") {
1311                 while (c.lastChild != 'undefined' && c.childNodes.length > 100) {
1312                         c.removeChild(c.lastChild);
1313                 }
1314
1315                 var d = new Date();
1316                 var ts = leading_zero(d.getHours()) + ":" + leading_zero(d.getMinutes()) +
1317                         ":" + leading_zero(d.getSeconds());
1318                 c.innerHTML = "<li class=\"" + ctx.debug_last_class + "\"><span class=\"debugTS\">[" + ts + "]</span> " +
1319                         msg + "</li>" + c.innerHTML;
1320         }
1321 }
1322
1323 function getInitParam(key) {
1324         return getMainContext().init_params[key];
1325 }
1326
1327 function storeInitParam(key, value, is_client) {
1328         try {
1329                 if (!is_client) {
1330                         if (getMainContext().init_params[key] != value) {
1331                                 debug("storeInitParam: " + key + " => " + value);
1332                                 //new Ajax.Request("backend.php?op=rpc&subop=storeParam&key=" +
1333                                 //      param_escape(key) + "&value=" + param_escape(value));
1334                                 var f = getMainContext().document.getElementById("backReqBox");
1335                                 f.src = "backend.php?op=rpc&subop=storeParam&key=" +
1336                                         param_escape(key) + "&value=" + param_escape(value);
1337                         }
1338                 }
1339                 getMainContext().init_params[key] = value;
1340         } catch (e) {
1341                 exception_error("storeInitParam", e);
1342         }
1343 }
1344
1345 /*
1346 function storeInitParams(params, is_client) {
1347         try {
1348                 var s = "";
1349
1350                 for (k in params) {
1351                         if (getMainContext().init_params[k] != params[k]) {
1352                                 s += k + "=" + params[k] + ";";
1353                                 getMainContext().init_params[k] = params[k];
1354                         }
1355                 }
1356
1357                 debug("storeInitParams: " + s);
1358
1359                 if (!is_client) {
1360                         new Ajax.Request("backend.php?op=rpc&subop=storeParams&str=" + s);
1361                 }
1362         } catch (e) {
1363                 exception_error("storeInitParams", e);
1364         }
1365 }*/
1366
1367 function fatalError(code, message) {
1368         try {
1369                 var fe = document.getElementById("fatal_error");
1370                 var fc = document.getElementById("fatal_error_msg");
1371
1372                 fc.innerHTML = "Code " + code + ": " + message;
1373
1374                 fe.style.display = "block";
1375
1376         } catch (e) {
1377                 exception_error("fatalError", e);
1378         }
1379 }
1380
1381 function getFeedName(id, is_cat) {
1382         var d = getFeedsContext().document;
1383
1384         var e;
1385
1386         if (is_cat) {
1387                 e = d.getElementById("FCATN-" + id);
1388         } else {
1389                 e = d.getElementById("FEEDN-" + id);
1390         }
1391         if (e) {
1392                 return e.innerHTML.stripTags();
1393         } else {
1394                 return null;
1395         }
1396 }