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