functions.js

   1 var hotkeys_enabled = true;
   2 var notify_silent = false;
   3 var last_progress_point = 0;
   4 var sanity_check_done = false;
   5
   6 /* add method to remove element from array */
   7
   8 Array.prototype.remove = function(s) {
   9         for (var i=0; i < this.length; i++) {
  10                 if (s == this[i]) this.splice(i, 1);
  11         }
  12 }
  13
  14 /* create console.log if it doesn't exist */
  15
  16 if (!window.console) console = {};
  17 console.log = console.log || function(msg) { };
  18 console.warn = console.warn || function(msg) { };
  19 console.error = console.error || function(msg) { };
  20
  21 function exception_error(location, e, ext_info) {
  22         var msg = format_exception_error(location, e);
  23
  24         if (!ext_info) ext_info = false;
  25
  26         disableHotkeys();
  27
  28         try {
  29
  30                 var ebc = $("xebContent");
  31
  32                 if (ebc) {
  33
  34                         Element.show("dialog_overlay");
  35                         Element.show("errorBoxShadow");
  36
  37                         if (ext_info) {
  38                                 if (ext_info.responseText) {
  39                                         ext_info = ext_info.responseText;
  40                                 }
  41                         }
  42
  43                         ebc.innerHTML =
  44                                 "<div><b>Error message:</b></div>" +
  45                                 "<pre>" + msg + "</pre>";
  46
  47                         if (ext_info) {
  48                                 ebc.innerHTML += "<div><b>Additional information:</b></div>" +
  49                                 "<textarea readonly=\"1\">" + ext_info + "</textarea>";
  50                         }
  51
  52                         ebc.innerHTML += "<div><b>Stack trace:</b></div>" +
  53                                 "<textarea readonly=\"1\">" + e.stack + "</textarea>";
  54
  55                 } else {
  56                         alert(msg);
  57                 }
  58
  59         } catch (e) {
  60                 alert(msg);
  61
  62         }
  63
  64 }
  65
  66 function format_exception_error(location, e) {
  67         var msg;
  68
  69         if (e.fileName) {
  70                 var base_fname = e.fileName.substring(e.fileName.lastIndexOf("/") + 1);
  71
  72                 msg = "Exception: " + e.name + ", " + e.message +
  73                         "\nFunction: " + location + "()" +
  74                         "\nLocation: " + base_fname + ":" + e.lineNumber;
  75
  76         } else if (e.description) {
  77                 msg = "Exception: " + e.description + "\nFunction: " + location + "()";
  78         } else {
  79                 msg = "Exception: " + e + "\nFunction: " + location + "()";
  80         }
  81
  82         console.error("EXCEPTION: " + msg);
  83
  84         return msg;
  85 }
  86
  87
  88 function disableHotkeys() {
  89         hotkeys_enabled = false;
  90 }
  91
  92 function enableHotkeys() {
  93         hotkeys_enabled = true;
  94 }
  95
  96 function param_escape(arg) {
  97         if (typeof encodeURIComponent != 'undefined')
  98                 return encodeURIComponent(arg);
  99         else
 100                 return escape(arg);
 101 }
 102
 103 function param_unescape(arg) {
 104         if (typeof decodeURIComponent != 'undefined')
 105                 return decodeURIComponent(arg);
 106         else
 107                 return unescape(arg);
 108 }
 109
 110 var notify_hide_timerid = false;
 111
 112 function hide_notify() {
 113         var n = $("notify");
 114         if (n) {
 115                 n.style.display = "none";
 116         }
 117 }
 118
 119 function notify_silent_next() {
 120         notify_silent = true;
 121 }
 122
 123 function notify_real(msg, no_hide, n_type) {
 124
 125         if (notify_silent) {
 126                 notify_silent = false;
 127                 return;
 128         }
 129
 130         var n = $("notify");
 131         var nb = $("notify_body");
 132
 133         if (!n || !nb) return;
 134
 135         if (notify_hide_timerid) {
 136                 window.clearTimeout(notify_hide_timerid);
 137         }
 138
 139         if (msg == "") {
 140                 if (n.style.display == "block") {
 141                         notify_hide_timerid = window.setTimeout("hide_notify()", 0);
 142                 }
 143                 return;
 144         } else {
 145                 n.style.display = "block";
 146         }
 147
 148         /* types:
 149
 150                 1 - generic
 151                 2 - progress
 152                 3 - error
 153                 4 - info
 154
 155         */
 156
 157         if (typeof __ != 'undefined') {
 158                 msg = __(msg);
 159         }
 160
 161         if (n_type == 1) {
 162                 n.className = "notify";
 163         } else if (n_type == 2) {
 164                 n.className = "notifyProgress";
 165                 msg = "<img src='"+getInitParam("sign_progress")+"'> " + msg;
 166         } else if (n_type == 3) {
 167                 n.className = "notifyError";
 168                 msg = "<img src='"+getInitParam("sign_excl")+"'> " + msg;
 169         } else if (n_type == 4) {
 170                 n.className = "notifyInfo";
 171                 msg = "<img src='"+getInitParam("sign_info")+"'> " + msg;
 172         }
 173
 174 //      msg = "<img src='images/live_com_loading.gif'> " + msg;
 175
 176         nb.innerHTML = msg;
 177
 178         if (!no_hide) {
 179                 notify_hide_timerid = window.setTimeout("hide_notify()", 3000);
 180         }
 181 }
 182
 183 function notify(msg, no_hide) {
 184         notify_real(msg, no_hide, 1);
 185 }
 186
 187 function notify_progress(msg, no_hide) {
 188         notify_real(msg, no_hide, 2);
 189 }
 190
 191 function notify_error(msg, no_hide) {
 192         notify_real(msg, no_hide, 3);
 193
 194 }
 195
 196 function notify_info(msg, no_hide) {
 197         notify_real(msg, no_hide, 4);
 198 }
 199
 200 function cleanSelected(element) {
 201         var content = $(element);
 202
 203         for (i = 0; i < content.rows.length; i++) {
 204                 content.rows[i].className = content.rows[i].className.replace("Selected", "");
 205         }
 206 }
 207
 208 function getVisibleUnreadHeadlines() {
 209         var content = $("headlinesList");
 210
 211         var rows = new Array();
 212
 213         if (!content) return rows;
 214
 215         for (i = 0; i < content.rows.length; i++) {
 216                 var row_id = content.rows[i].id.replace("RROW-", "");
 217                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 218                                 rows.push(row_id);
 219                 }
 220         }
 221         return rows;
 222 }
 223
 224 function setCookie(name, value, lifetime, path, domain, secure) {
 225
 226         var d = false;
 227
 228         if (lifetime) {
 229                 d = new Date();
 230                 d.setTime(d.getTime() + (lifetime * 1000));
 231         }
 232
 233         console.log("setCookie: " + name + " => " + value + ": " + d);
 234
 235         int_setCookie(name, value, d, path, domain, secure);
 236
 237 }
 238
 239 function int_setCookie(name, value, expires, path, domain, secure) {
 240         document.cookie= name + "=" + escape(value) +
 241                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 242                 ((path) ? "; path=" + path : "") +
 243                 ((domain) ? "; domain=" + domain : "") +
 244                 ((secure) ? "; secure" : "");
 245 }
 246
 247 function delCookie(name, path, domain) {
 248         if (getCookie(name)) {
 249                 document.cookie = name + "=" +
 250                 ((path) ? ";path=" + path : "") +
 251                 ((domain) ? ";domain=" + domain : "" ) +
 252                 ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
 253         }
 254 }
 255
 256
 257 function getCookie(name) {
 258
 259         var dc = document.cookie;
 260         var prefix = name + "=";
 261         var begin = dc.indexOf("; " + prefix);
 262         if (begin == -1) {
 263             begin = dc.indexOf(prefix);
 264             if (begin != 0) return null;
 265         }
 266         else {
 267             begin += 2;
 268         }
 269         var end = document.cookie.indexOf(";", begin);
 270         if (end == -1) {
 271             end = dc.length;
 272         }
 273         return unescape(dc.substring(begin + prefix.length, end));
 274 }
 275
 276 function gotoPreferences() {
 277         document.location.href = "prefs.php";
 278 }
 279
 280 function gotoMain() {
 281         document.location.href = "tt-rss.php";
 282 }
 283
 284 function gotoExportOpml() {
 285         document.location.href = "opml.php?op=Export";
 286 }
 287
 288
 289 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 290   * * @author Sundar Dorai-Raj
 291   * * Email: sdoraira@vt.edu
 292   * * This program is free software; you can redistribute it and/or
 293   * * modify it under the terms of the GNU General Public License
 294   * * as published by the Free Software Foundation; either version 2
 295   * * of the License, or (at your option) any later version,
 296   * * provided that any use properly credits the author.
 297   * * This program is distributed in the hope that it will be useful,
 298   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 299   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 300   * * GNU General Public License for more details at http://www.gnu.org * * */
 301
 302   var numbers=".0123456789";
 303   function isNumeric(x) {
 304     // is x a String or a character?
 305     if(x.length>1) {
 306       // remove negative sign
 307       x=Math.abs(x)+"";
 308       for(j=0;j<x.length;j++) {
 309         // call isNumeric recursively for each character
 310         number=isNumeric(x.substring(j,j+1));
 311         if(!number) return number;
 312       }
 313       return number;
 314     }
 315     else {
 316       // if x is number return true
 317       if(numbers.indexOf(x)>=0) return true;
 318       return false;
 319     }
 320   }
 321
 322
 323 function toggleSelectRowById(sender, id) {
 324         var row = $(id);
 325
 326         if (sender.checked) {
 327                 if (!row.className.match("Selected")) {
 328                         row.className = row.className + "Selected";
 329                 }
 330         } else {
 331                 if (row.className.match("Selected")) {
 332                         row.className = row.className.replace("Selected", "");
 333                 }
 334         }
 335 }
 336
 337 function toggleSelectListRow(sender) {
 338         var parent_row = sender.parentNode;
 339
 340         if (sender.checked) {
 341                 if (!parent_row.className.match("Selected")) {
 342                         parent_row.className = parent_row.className + "Selected";
 343                 }
 344         } else {
 345                 if (parent_row.className.match("Selected")) {
 346                         parent_row.className = parent_row.className.replace("Selected", "");
 347                 }
 348         }
 349 }
 350
 351 function tSR(sender) {
 352         return toggleSelectRow(sender);
 353 }
 354
 355 function toggleSelectRow(sender) {
 356         var parent_row = sender.parentNode.parentNode;
 357
 358         if (sender.checked) {
 359                 if (!parent_row.className.match("Selected")) {
 360                         parent_row.className = parent_row.className + "Selected";
 361                 }
 362         } else {
 363                 if (parent_row.className.match("Selected")) {
 364                         parent_row.className = parent_row.className.replace("Selected", "");
 365                 }
 366         }
 367 }
 368
 369 function checkboxToggleElement(elem, id) {
 370         if (elem.checked) {
 371                 Effect.Appear(id, {duration : 0.5});
 372         } else {
 373                 Effect.Fade(id, {duration : 0.5});
 374         }
 375 }
 376
 377 function dropboxSelect(e, v) {
 378         for (i = 0; i < e.length; i++) {
 379                 if (e[i].value == v) {
 380                         e.selectedIndex = i;
 381                         break;
 382                 }
 383         }
 384 }
 385
 386 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
 387 // bugfixed just a little bit :-)
 388 function getURLParam(strParamName){
 389   var strReturn = "";
 390   var strHref = window.location.href;
 391
 392   if (strHref.indexOf("#") == strHref.length-1) {
 393                 strHref = strHref.substring(0, strHref.length-1);
 394   }
 395
 396   if ( strHref.indexOf("?") > -1 ){
 397     var strQueryString = strHref.substr(strHref.indexOf("?"));
 398     var aQueryString = strQueryString.split("&");
 399     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
 400       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
 401         var aParam = aQueryString[iParam].split("=");
 402         strReturn = aParam[1];
 403         break;
 404       }
 405     }
 406   }
 407   return strReturn;
 408 }
 409
 410 function leading_zero(p) {
 411         var s = String(p);
 412         if (s.length == 1) s = "0" + s;
 413         return s;
 414 }
 415
 416 function make_timestamp() {
 417         var d = new Date();
 418
 419         return leading_zero(d.getHours()) + ":" + leading_zero(d.getMinutes()) +
 420                         ":" + leading_zero(d.getSeconds());
 421 }
 422
 423
 424 function closeErrorBox() {
 425
 426         if (Element.visible("errorBoxShadow")) {
 427                 Element.hide("dialog_overlay");
 428                 Element.hide("errorBoxShadow");
 429
 430                 enableHotkeys();
 431         }
 432
 433         return false;
 434 }
 435
 436 function closeInfoBox(cleanup) {
 437
 438         try {
 439                 enableHotkeys();
 440
 441                 if (Element.visible("infoBoxShadow")) {
 442                         Element.hide("dialog_overlay");
 443                         Element.hide("infoBoxShadow");
 444
 445                         if (cleanup) $("infoBox").innerHTML = "&nbsp;";
 446                 }
 447         } catch (e) {
 448                 exception_error("closeInfoBox", e);
 449         }
 450
 451         return false;
 452 }
 453
 454
 455 function displayDlg(id, param, callback) {
 456
 457         notify_progress("Loading, please wait...", true);
 458
 459         disableHotkeys();
 460
 461         var query = "?op=dlg&id=" +
 462                 param_escape(id) + "&param=" + param_escape(param);
 463
 464         new Ajax.Request("backend.php", {
 465                 parameters: query,
 466                 onComplete: function (transport) {
 467                         infobox_callback2(transport);
 468                         if (callback) callback(transport);
 469                 } });
 470
 471         return false;
 472 }
 473
 474 function infobox_submit_callback2(transport) {
 475         closeInfoBox();
 476
 477         try {
 478                 // called from prefs, reload tab
 479                 if (typeof active_tab != 'undefined' && active_tab) {
 480                         selectTab(active_tab, false);
 481                 }
 482         } catch (e) { }
 483
 484         if (transport.responseText) {
 485                 notify_info(transport.responseText);
 486         }
 487 }
 488
 489 function infobox_callback2(transport) {
 490         try {
 491
 492                 console.log("infobox_callback2");
 493
 494                 var box = $('infoBox');
 495
 496                 if (box) {
 497
 498                         if (!getInitParam("infobox_disable_overlay")) {
 499                                 Element.show("dialog_overlay");
 500                         }
 501
 502                         box.innerHTML=transport.responseText;
 503                         Element.show("infoBoxShadow");
 504                         //Effect.SlideDown("infoBoxShadow", {duration : 1.0});
 505
 506
 507                 }
 508
 509                 disableHotkeys();
 510
 511                 notify("");
 512         } catch (e) {
 513                 exception_error("infobox_callback2", e);
 514         }
 515 }
 516
 517 function createFilter() {
 518
 519         try {
 520
 521                 var form = document.forms['filter_add_form'];
 522                 var reg_exp = form.reg_exp.value;
 523
 524                 if (reg_exp == "") {
 525                         alert(__("Can't add filter: nothing to match on."));
 526                         return false;
 527                 }
 528
 529                 var query = "?op=rpc&subop=verifyRegexp&reg_exp=" + param_escape(reg_exp);
 530
 531                 notify_progress("Verifying regular expression...");
 532
 533                 new Ajax.Request("backend.php", {
 534                                 parameters: query,
 535                                 onComplete: function(transport) {
 536                                         handle_rpc_reply(transport);
 537
 538                                         var response = transport.responseXML;
 539
 540                                         if (response) {
 541                                                 var s = response.getElementsByTagName("status")[0].firstChild.nodeValue;
 542
 543                                                 notify('');
 544
 545                                                 if (s == "INVALID") {
 546                                                         alert("Match regular expression seems to be invalid.");
 547                                                         return;
 548                                                 } else {
 549
 550                                                         var query = Form.serialize("filter_add_form");
 551
 552                                                         // we can be called from some other tab in Prefs
 553                                                         if (typeof active_tab != 'undefined' && active_tab) {
 554                                                                 active_tab = "filterConfig";
 555                                                         }
 556
 557                                                         new Ajax.Request("backend.php?" + query, {
 558                                                                 onComplete: function (transport) {
 559                                                                         infobox_submit_callback2(transport);
 560                                                                 } });
 561
 562                                                         return true;
 563                                                 }
 564                                         }
 565
 566                         } });
 567
 568         } catch (e) {
 569                 exception_error("createFilter", e);
 570         }
 571 }
 572
 573 function isValidURL(s) {
 574         return s.match("http://") != null || s.match("https://") != null || s.match("feed://") != null;
 575 }
 576
 577 function subscribeToFeed() {
 578
 579         try {
 580
 581         var form = document.forms['feed_add_form'];
 582         var feed_url = form.feed_url.value;
 583
 584         if (feed_url == "") {
 585                 alert(__("Can't subscribe: no feed URL given."));
 586                 return false;
 587         }
 588
 589         notify_progress(__("Subscribing to feed..."), true);
 590
 591         var query = Form.serialize("feed_add_form");
 592
 593         console.log("subscribe q: " + query);
 594
 595         Form.disable("feed_add_form");
 596
 597         new Ajax.Request("backend.php", {
 598                 parameters: query,
 599                 onComplete: function(transport) {
 600                         //dlg_frefresh_callback(transport);
 601
 602                         try {
 603
 604                                 if (!transport.responseXML)
 605                                         console.log(transport.responseText);
 606
 607                                 var result = transport.responseXML.getElementsByTagName('result')[0];
 608                                 var rc = parseInt(result.getAttribute('code'));
 609
 610                                 Form.enable("feed_add_form");
 611
 612                                 notify('');
 613
 614                                 switch (rc) {
 615                                 case 1:
 616                                         closeInfoBox();
 617                                         notify_info(__("Subscribed to %s").replace("%s", feed_url));
 618
 619                                         if (inPreferences()) {
 620                                                 updateFeedList();
 621                                         } else {
 622                                                 setTimeout('updateFeedList(false, false)', 50);
 623                                         }
 624                                         break;
 625                                 case 2:
 626                                         alert(__("Specified URL seems to be invalid."));
 627                                         break;
 628                                 case 3:
 629                                         alert(__("Specified URL doesn't seem to contain any feeds."));
 630                                         break;
 631                                 case 4:
 632                                         new Ajax.Request("backend.php", {
 633                                                 parameters: 'op=rpc&subop=extractfeedurls&url=' + encodeURIComponent(feed_url),
 634                                                 onComplete: function(transport) {
 635                                                         var result = transport.responseXML.getElementsByTagName('urls')[0];
 636                                                         var feeds = JSON.parse(result.firstChild.nodeValue);
 637                                                         var select = document.getElementById("faad_feeds_container_select");
 638
 639                                                         while (select.hasChildNodes()) {
 640                                                                 select.removeChild(elem.firstChild);
 641                                                         }
 642                                                         var count = 0;
 643                                                         for (var feedUrl in feeds) {
 644                                                                 select.insert(new Option(feeds[feedUrl], feedUrl, false));
 645                                                                 count++;
 646                                                         }
 647                                                         if (count > 5) count = 5;
 648                                                         select.size = count;
 649
 650                                                         Effect.Appear('fadd_feeds_container', {duration : 0.5});
 651                                                 }
 652                                         });
 653                                         break;
 654                                 case 5:
 655                                         alert(__("Couldn't download the specified URL."));
 656                                         break;
 657                                 case 0:
 658                                         alert(__("You are already subscribed to this feed."));
 659                                         break;
 660                                 }
 661
 662                         } catch (e) {
 663                                 exception_error("subscribeToFeed", e);
 664                         }
 665
 666                 } });
 667
 668         } catch (e) {
 669                 exception_error("subscribeToFeed", e);
 670         }
 671
 672         return false;
 673 }
 674
 675 function filterCR(e, f)
 676 {
 677      var key;
 678
 679      if(window.event)
 680           key = window.event.keyCode;     //IE
 681      else
 682           key = e.which;     //firefox
 683
 684         if (key == 13) {
 685                 if (typeof f != 'undefined') {
 686                         f();
 687                         return false;
 688                 } else {
 689                         return false;
 690                 }
 691         } else {
 692                 return true;
 693         }
 694 }
 695
 696 function getInitParam(key) {
 697         return init_params[key];
 698 }
 699
 700 function setInitParam(key, value) {
 701         init_params[key] = value;
 702 }
 703
 704 function fatalError(code, msg, ext_info) {
 705         try {
 706
 707                 if (!ext_info) ext_info = "N/A";
 708
 709                 if (code == 6) {
 710                         window.location.href = "tt-rss.php";
 711                 } else if (code == 5) {
 712                         window.location.href = "db-updater.php";
 713                 } else {
 714
 715                         if (msg == "") msg = "Unknown error";
 716
 717                         var ebc = $("xebContent");
 718
 719                         if (ebc) {
 720
 721                                 Element.show("dialog_overlay");
 722                                 Element.show("errorBoxShadow");
 723                                 Element.hide("xebBtn");
 724
 725                                 if (ext_info) {
 726                                         if (ext_info.responseText) {
 727                                                 ext_info = ext_info.responseText;
 728                                         }
 729                                 }
 730
 731                                 ebc.innerHTML =
 732                                         "<div><b>Error message:</b></div>" +
 733                                         "<pre>" + msg + "</pre>" +
 734                                         "<div><b>Additional information:</b></div>" +
 735                                         "<textarea readonly=\"1\">" + ext_info + "</textarea>";
 736                         }
 737                 }
 738
 739         } catch (e) {
 740                 exception_error("fatalError", e);
 741         }
 742 }
 743
 744 function filterDlgCheckType(sender) {
 745
 746         try {
 747
 748                 var ftype = sender[sender.selectedIndex].value;
 749
 750                 var form = document.forms["filter_add_form"];
 751
 752                 if (!form) {
 753                         form = document.forms["filter_edit_form"];
 754                 }
 755
 756                 if (!form) {
 757                         console.log("filterDlgCheckType: can't find form!");
 758                         return;
 759                 }
 760
 761                 // if selected filter type is 5 (Date) enable the modifier dropbox
 762                 if (ftype == 5) {
 763                         Element.show("filter_dlg_date_mod_box");
 764                         Element.show("filter_dlg_date_chk_box");
 765                 } else {
 766                         Element.hide("filter_dlg_date_mod_box");
 767                         Element.hide("filter_dlg_date_chk_box");
 768
 769                 }
 770
 771         } catch (e) {
 772                 exception_error("filterDlgCheckType", e);
 773         }
 774
 775 }
 776
 777 function filterDlgCheckAction(sender) {
 778
 779         try {
 780
 781                 var action = sender[sender.selectedIndex].value;
 782
 783                 var form = document.forms["filter_add_form"];
 784
 785                 if (!form) {
 786                         form = document.forms["filter_edit_form"];
 787                 }
 788
 789                 if (!form) {
 790                         console.log("filterDlgCheckAction: can't find form!");
 791                         return;
 792                 }
 793
 794                 var action_param = $("filter_dlg_param_box");
 795
 796                 if (!action_param) {
 797                         console.log("filterDlgCheckAction: can't find action param box!");
 798                         return;
 799                 }
 800
 801                 // if selected action supports parameters, enable params field
 802                 if (action == 4 || action == 6 || action == 7) {
 803                         Element.show(action_param);
 804                         if (action != 7) {
 805                                 Element.show(form.action_param);
 806                                 Element.hide(form.action_param_label);
 807                         } else {
 808                                 Element.show(form.action_param_label);
 809                                 Element.hide(form.action_param);
 810                         }
 811                 } else {
 812                         Element.hide(action_param);
 813                 }
 814
 815         } catch (e) {
 816                 exception_error("filterDlgCheckAction", e);
 817         }
 818
 819 }
 820
 821 function filterDlgCheckDate() {
 822         try {
 823                 var form = document.forms["filter_add_form"];
 824
 825                 if (!form) {
 826                         form = document.forms["filter_edit_form"];
 827                 }
 828
 829                 if (!form) {
 830                         console.log("filterDlgCheckAction: can't find form!");
 831                         return;
 832                 }
 833
 834                 var reg_exp = form.reg_exp.value;
 835
 836                 var query = "?op=rpc&subop=checkDate&date=" + reg_exp;
 837
 838                 new Ajax.Request("backend.php", {
 839                         parameters: query,
 840                         onComplete: function(transport) {
 841
 842                                 var form = document.forms["filter_add_form"];
 843
 844                                 if (!form) {
 845                                         form = document.forms["filter_edit_form"];
 846                                 }
 847
 848                                 if (transport.responseXML) {
 849                                         var result = transport.responseXML.getElementsByTagName("result")[0];
 850
 851                                         if (result && result.firstChild) {
 852                                                 if (result.firstChild.nodeValue == "1") {
 853
 854                                                         new Effect.Highlight(form.reg_exp, {startcolor : '#00ff00'});
 855
 856                                                         return;
 857                                                 }
 858                                         }
 859                                 }
 860
 861                                 new Effect.Highlight(form.reg_exp, {startcolor : '#ff0000'});
 862
 863                         } });
 864
 865
 866         } catch (e) {
 867                 exception_error("filterDlgCheckDate", e);
 868         }
 869 }
 870
 871 function explainError(code) {
 872         return displayDlg("explainError", code);
 873 }
 874
 875 function displayHelpInfobox(topic_id) {
 876
 877         var url = "backend.php?op=help&tid=" + param_escape(topic_id);
 878
 879         var w = window.open(url, "ttrss_help",
 880                 "status=0,toolbar=0,location=0,width=450,height=500,scrollbars=1,menubar=0");
 881
 882 }
 883
 884 function loading_set_progress(p) {
 885         try {
 886                 if (p < last_progress_point || !Element.visible("overlay")) return;
 887
 888                 console.log("loading_set_progress : " + p + " (" + last_progress_point + ")");
 889
 890                 var o = $("l_progress_i");
 891
 892 //              o.style.width = (p * 2) + "px";
 893
 894                 new Effect.Scale(o, p, {
 895                         scaleY : false,
 896                         scaleFrom : last_progress_point,
 897                         scaleMode: { originalWidth : 200 },
 898                         queue: { position: 'end', scope: 'LSP-Q', limit: 3 } });
 899
 900                 last_progress_point = p;
 901
 902         } catch (e) {
 903                 exception_error("loading_set_progress", e);
 904         }
 905 }
 906
 907 function remove_splash() {
 908         if (Element.visible("overlay")) {
 909                 console.log("about to remove splash, OMG!");
 910                 Element.hide("overlay");
 911                 console.log("removed splash!");
 912         }
 913 }
 914
 915 function getSelectedFeedsFromBrowser() {
 916
 917         var list = $("browseFeedList");
 918
 919         var selected = new Array();
 920
 921         for (i = 0; i < list.childNodes.length; i++) {
 922                 var child = list.childNodes[i];
 923                 if (child.id && child.id.match("FBROW-")) {
 924                         var id = child.id.replace("FBROW-", "");
 925
 926                         var cb = $("FBCHK-" + id);
 927
 928                         if (cb.checked) {
 929                                 selected.push(id);
 930                         }
 931                 }
 932         }
 933
 934         return selected;
 935 }
 936
 937 function updateFeedBrowser() {
 938         try {
 939
 940                 var query = Form.serialize("feed_browser");
 941
 942                 Element.show('feed_browser_spinner');
 943
 944                 new Ajax.Request("backend.php", {
 945                         parameters: query,
 946                         onComplete: function(transport) {
 947                                 notify('');
 948
 949                                 Element.hide('feed_browser_spinner');
 950
 951                                 var c = $("browseFeedList");
 952                                 var r = transport.responseXML.getElementsByTagName("content")[0];
 953                                 var nr = transport.responseXML.getElementsByTagName("num-results")[0];
 954                                 var mode = transport.responseXML.getElementsByTagName("mode")[0];
 955
 956                                 if (c && r) {
 957                                         c.innerHTML = r.firstChild.nodeValue;
 958                                 }
 959
 960                                 if (parseInt(mode.getAttribute("value")) == 2) {
 961                                         Element.show('feed_archive_remove');
 962                                 } else {
 963                                         Element.hide('feed_archive_remove');
 964                                 }
 965
 966                         } });
 967
 968         } catch (e) {
 969                 exception_error("updateFeedBrowser", e);
 970         }
 971
 972 }
 973
 974 function transport_error_check(transport) {
 975         try {
 976                 if (transport.responseXML) {
 977                         var error = transport.responseXML.getElementsByTagName("error")[0];
 978
 979                         if (error) {
 980                                 var code = error.getAttribute("error-code");
 981                                 var msg = error.getAttribute("error-msg");
 982                                 if (code != 0) {
 983                                         fatalError(code, msg);
 984                                         return false;
 985                                 }
 986                         }
 987                 }
 988         } catch (e) {
 989                 exception_error("check_for_error_xml", e);
 990         }
 991         return true;
 992 }
 993
 994 function strip_tags(s) {
 995         return s.replace(/<\/?[^>]+(>|$)/g, "");
 996 }
 997
 998 function truncate_string(s, length) {
 999         if (!length) length = 30;
1000         var tmp = s.substring(0, length);
1001         if (s.length > length) tmp += "&hellip;";
1002         return tmp;
1003 }
1004
1005 function hotkey_prefix_timeout() {
1006         try {
1007
1008                 var date = new Date();
1009                 var ts = Math.round(date.getTime() / 1000);
1010
1011                 if (hotkey_prefix_pressed && ts - hotkey_prefix_pressed >= 5) {
1012                         console.log("hotkey_prefix seems to be stuck, aborting");
1013                         hotkey_prefix_pressed = false;
1014                         hotkey_prefix = false;
1015                         Element.hide('cmdline');
1016                 }
1017
1018                 setTimeout("hotkey_prefix_timeout()", 1000);
1019
1020         } catch  (e) {
1021                 exception_error("hotkey_prefix_timeout", e);
1022         }
1023 }
1024
1025 function hideAuxDlg() {
1026         try {
1027                 Element.hide('auxDlg');
1028         } catch (e) {
1029                 exception_error("hideAuxDlg", e);
1030         }
1031 }
1032
1033 function feedBrowserSubscribe() {
1034         try {
1035
1036                 var selected = getSelectedFeedsFromBrowser();
1037
1038                 var mode = document.forms['feed_browser'].mode;
1039
1040                 mode = mode[mode.selectedIndex].value;
1041
1042                 if (selected.length > 0) {
1043                         closeInfoBox();
1044
1045                         notify_progress("Loading, please wait...", true);
1046
1047                         var query = "?op=rpc&subop=massSubscribe&ids="+
1048                                 param_escape(selected.toString()) + "&mode=" + param_escape(mode);
1049
1050                         new Ajax.Request("backend.php", {
1051                                 parameters: query,
1052                                 onComplete: function(transport) {
1053
1054                                         var nf = transport.responseXML.getElementsByTagName('num-feeds')[0];
1055                                         var nf_value = nf.getAttribute("value");
1056
1057                                         notify_info(__("Subscribed to %d feed(s).").replace("%d", nf_value));
1058
1059                                         if (inPreferences()) {
1060                                                 updateFeedList();
1061                                         } else {
1062                                                 setTimeout('updateFeedList(false, false)', 50);
1063                                         }
1064                                 } });
1065
1066                 } else {
1067                         alert(__("No feeds are selected."));
1068                 }
1069
1070         } catch (e) {
1071                 exception_error("feedBrowserSubscribe", e);
1072         }
1073 }
1074
1075 function feedArchiveRemove() {
1076         try {
1077
1078                 var selected = getSelectedFeedsFromBrowser();
1079
1080                 if (selected.length > 0) {
1081
1082                         var pr = __("Remove selected feeds from the archive? Feeds with stored articles will not be removed.");
1083
1084                         if (confirm(pr)) {
1085                                 Element.show('feed_browser_spinner');
1086
1087                                 var query = "?op=rpc&subop=remarchived&ids=" +
1088                                         param_escape(selected.toString());;
1089
1090                                 new Ajax.Request("backend.php", {
1091                                         parameters: query,
1092                                         onComplete: function(transport) {
1093                                                 updateFeedBrowser();
1094                                         } });
1095                         }
1096
1097                 } else {
1098                         alert(__("No feeds are selected."));
1099                 }
1100
1101         } catch (e) {
1102                 exception_error("feedArchiveRemove", e);
1103         }
1104 }
1105
1106 function uploadIconHandler(rc) {
1107         try {
1108                 switch (rc) {
1109                         case 0:
1110                                 notify_info("Upload complete.");
1111                                 if (inPreferences()) {
1112                                         updateFeedList();
1113                                 } else {
1114                                         setTimeout('updateFeedList(false, false)', 50);
1115                                 }
1116                                 break;
1117                         case 1:
1118                                 notify_error("Upload failed: icon is too big.");
1119                                 break;
1120                         case 2:
1121                                 notify_error("Upload failed.");
1122                                 break;
1123                 }
1124
1125         } catch (e) {
1126                 exception_error("uploadIconHandler", e);
1127         }
1128 }
1129
1130 function removeFeedIcon(id) {
1131
1132         try {
1133
1134                 if (confirm(__("Remove stored feed icon?"))) {
1135                         var query = "backend.php?op=pref-feeds&subop=removeicon&feed_id=" + param_escape(id);
1136
1137                         console.log(query);
1138
1139                         notify_progress("Removing feed icon...", true);
1140
1141                         new Ajax.Request("backend.php", {
1142                                 parameters: query,
1143                                 onComplete: function(transport) {
1144                                         notify_info("Feed icon removed.");
1145                                         if (inPreferences()) {
1146                                                 updateFeedList();
1147                                         } else {
1148                                                 setTimeout('updateFeedList(false, false)', 50);
1149                                         }
1150                                 } });
1151                 }
1152
1153                 return false;
1154         } catch (e) {
1155                 exception_error("uploadFeedIcon", e);
1156         }
1157 }
1158
1159 function uploadFeedIcon() {
1160
1161         try {
1162
1163                 var file = $("icon_file");
1164
1165                 if (file.value.length == 0) {
1166                         alert(__("Please select an image file to upload."));
1167                 } else {
1168                         if (confirm(__("Upload new icon for this feed?"))) {
1169                                 notify_progress("Uploading, please wait...", true);
1170                                 return true;
1171                         }
1172                 }
1173
1174                 return false;
1175
1176         } catch (e) {
1177                 exception_error("uploadFeedIcon", e);
1178         }
1179 }
1180
1181 function addLabel(select, callback) {
1182
1183         try {
1184
1185                 var caption = prompt(__("Please enter label caption:"), "");
1186
1187                 if (caption != undefined) {
1188
1189                         if (caption == "") {
1190                                 alert(__("Can't create label: missing caption."));
1191                                 return false;
1192                         }
1193
1194                         var query = "?op=pref-labels&subop=add&caption=" +
1195                                 param_escape(caption);
1196
1197                         if (select)
1198                                 query += "&output=select";
1199
1200                         notify_progress("Loading, please wait...", true);
1201
1202                         if (inPreferences() && !select) active_tab = "labelConfig";
1203
1204                         new Ajax.Request("backend.php", {
1205                                 parameters: query,
1206                                 onComplete: function(transport) {
1207                                         if (callback) {
1208                                                 callback(transport);
1209                                         } else if (inPreferences()) {
1210                                                 infobox_submit_callback2(transport);
1211                                         } else {
1212                                                 updateFeedList();
1213                                         }
1214                         } });
1215
1216                 }
1217
1218         } catch (e) {
1219                 exception_error("addLabel", e);
1220         }
1221 }
1222
1223 function quickAddFeed() {
1224         displayDlg('quickAddFeed', '',
1225            function () {$('feed_url').focus();});
1226 }
1227
1228 function quickAddFilter() {
1229         displayDlg('quickAddFilter', '',
1230            function () {document.forms['filter_add_form'].reg_exp.focus();});
1231 }
1232
1233 function unsubscribeFeed(feed_id, title) {
1234
1235         var msg = __("Unsubscribe from %s?").replace("%s", title);
1236
1237         if (title == undefined || confirm(msg)) {
1238                 notify_progress("Removing feed...");
1239
1240                 var query = "?op=pref-feeds&quiet=1&subop=remove&ids=" + feed_id;
1241
1242                 new Ajax.Request("backend.php", {
1243                         parameters: query,
1244                         onComplete: function(transport) {
1245
1246                                         closeInfoBox();
1247
1248                                         if (inPreferences()) {
1249                                                 updateFeedList();
1250                                         } else {
1251                                                 dlg_frefresh_callback(transport, feed_id);
1252                                         }
1253
1254                                 } });
1255         }
1256
1257         return false;
1258 }
1259
1260
1261 function backend_sanity_check_callback(transport) {
1262
1263         try {
1264
1265                 if (sanity_check_done) {
1266                         fatalError(11, "Sanity check request received twice. This can indicate "+
1267                       "presence of Firebug or some other disrupting extension. "+
1268                                 "Please disable it and try again.");
1269                         return;
1270                 }
1271
1272                 if (!transport.responseXML) {
1273                         if (!store) {
1274                                 fatalError(3, "Sanity check: Received reply is not XML",
1275                                         transport.responseText);
1276                                 return;
1277                         } else {
1278                                 init_offline();
1279                                 return;
1280                         }
1281                 }
1282
1283                 if (getURLParam("offline")) {
1284                         return init_offline();
1285                 }
1286
1287                 var reply = transport.responseXML.getElementsByTagName("error")[0];
1288
1289                 if (!reply) {
1290                         fatalError(3, "Sanity check: invalid RPC reply", transport.responseText);
1291                         return;
1292                 }
1293
1294                 var error_code = reply.getAttribute("error-code");
1295
1296                 if (error_code && error_code != 0) {
1297                         return fatalError(error_code, reply.getAttribute("error-msg"));
1298                 }
1299
1300                 console.log("sanity check ok");
1301
1302                 var params = transport.responseXML.getElementsByTagName("init-params")[0];
1303
1304                 if (params) {
1305                         console.log('reading init-params...');
1306
1307                         params = JSON.parse(params.firstChild.nodeValue);
1308
1309                         if (params) {
1310                                 for (k in params) {
1311
1312                                         var v = params[k];
1313
1314                                         console.log("IP: " + k + " => " + v);
1315
1316                                         if (db) {
1317                                                 db.execute("DELETE FROM init_params WHERE key = ?", [k]);
1318                                                 db.execute("INSERT INTO init_params (key,value) VALUES (?, ?)",
1319                                                         [k, v]);
1320                                         }
1321                                 }
1322                         }
1323
1324                         init_params = params;
1325                 }
1326
1327                 sanity_check_done = true;
1328
1329                 init_second_stage();
1330
1331         } catch (e) {
1332                 exception_error("backend_sanity_check_callback", e, transport);
1333         }
1334 }
1335
1336 function has_local_storage() {
1337         return false;
1338 /*      try {
1339                 return 'localStorage' in window && window['localStorage'] != null;
1340         } catch (e) {
1341                 return false;
1342         } */
1343 }
1344
1345 function catSelectOnChange(elem) {
1346         try {
1347                 var value = elem[elem.selectedIndex].value;
1348                 var def = elem.getAttribute('default');
1349
1350                 if (value == "ADD_CAT") {
1351
1352                         if (def)
1353                                 dropboxSelect(elem, def);
1354                         else
1355                                 elem.selectedIndex = 0;
1356
1357                         quickAddCat(elem);
1358                 }
1359
1360         } catch (e) {
1361                 exception_error("catSelectOnChange", e);
1362         }
1363 }
1364
1365 function quickAddCat(elem) {
1366         try {
1367                 var cat = prompt(__("Please enter category title:"));
1368
1369                 if (cat) {
1370
1371                         var query = "?op=rpc&subop=quickAddCat&cat=" + param_escape(cat);
1372
1373                         notify_progress("Loading, please wait...", true);
1374
1375                         new Ajax.Request("backend.php", {
1376                                 parameters: query,
1377                                 onComplete: function (transport) {
1378                                         var response = transport.responseXML;
1379                                         var select = response.getElementsByTagName("select")[0];
1380                                         var options = select.getElementsByTagName("option");
1381
1382                                         dropbox_replace_options(elem, options);
1383
1384                                         notify('');
1385
1386                         } });
1387
1388                 }
1389
1390         } catch (e) {
1391                 exception_error("quickAddCat", e);
1392         }
1393 }
1394
1395 function genUrlChangeKey(feed, is_cat) {
1396
1397         try {
1398                 var ok = confirm(__("Generate new syndication address for this feed?"));
1399
1400                 if (ok) {
1401
1402                         notify_progress("Trying to change address...", true);
1403
1404                         var query = "?op=rpc&subop=regenFeedKey&id=" + param_escape(feed) +
1405                                 "&is_cat=" + param_escape(is_cat);
1406
1407                         new Ajax.Request("backend.php", {
1408                                 parameters: query,
1409                                 onComplete: function(transport) {
1410                                                 var new_link = transport.responseXML.getElementsByTagName("link")[0];
1411
1412                                                 var e = $('gen_feed_url');
1413
1414                                                 if (new_link) {
1415
1416                                                         new_link = new_link.firstChild.nodeValue;
1417
1418                                                         e.innerHTML = e.innerHTML.replace(/\&amp;key=.*$/,
1419                                                                 "&amp;key=" + new_link);
1420
1421                                                         e.href = e.href.replace(/\&amp;key=.*$/,
1422                                                                 "&amp;key=" + new_link);
1423
1424                                                         new Effect.Highlight(e);
1425
1426                                                         notify('');
1427
1428                                                 } else {
1429                                                         notify_error("Could not change feed URL.");
1430                                                 }
1431                                 } });
1432                 }
1433         } catch (e) {
1434                 exception_error("genUrlChangeKey", e);
1435         }
1436         return false;
1437 }
1438
1439 function labelSelectOnChange(elem) {
1440         try {
1441                 var value = elem[elem.selectedIndex].value;
1442                 var def = elem.getAttribute('default');
1443
1444                 if (value == "ADD_LABEL") {
1445
1446                         if (def)
1447                                 dropboxSelect(elem, def);
1448                         else
1449                                 elem.selectedIndex = 0;
1450
1451                         addLabel(elem, function(transport) {
1452
1453                                         try {
1454
1455                                                 var response = transport.responseXML;
1456                                                 var select = response.getElementsByTagName("select")[0];
1457                                                 var options = select.getElementsByTagName("option");
1458
1459                                                 dropbox_replace_options(elem, options);
1460
1461                                                 notify('');
1462                                         } catch (e) {
1463                                                 exception_error("addLabel", e);
1464                                         }
1465                         });
1466                 }
1467
1468         } catch (e) {
1469                 exception_error("labelSelectOnChange", e);
1470         }
1471 }
1472
1473 function dropbox_replace_options(elem, options) {
1474
1475         try {
1476                 while (elem.hasChildNodes())
1477                         elem.removeChild(elem.firstChild);
1478
1479                 var sel_idx = -1;
1480
1481                 for (var i = 0; i < options.length; i++) {
1482                         var text = options[i].firstChild.nodeValue;
1483                         var value = options[i].getAttribute("value");
1484
1485                         if (value == undefined) value = text;
1486
1487                         var issel = options[i].getAttribute("selected") == "1";
1488
1489                         var option = new Option(text, value, issel);
1490
1491                         if (options[i].getAttribute("disabled"))
1492                                 option.setAttribute("disabled", true);
1493
1494                         elem.insert(option);
1495
1496                         if (issel) sel_idx = i;
1497                 }
1498
1499                 // Chrome doesn't seem to just select stuff when you pass new Option(x, y, true)
1500                 if (sel_idx >= 0) elem.selectedIndex = sel_idx;
1501
1502         } catch (e) {
1503                 exception_error("dropbox_replace_options", e);
1504         }
1505 }
1506
1507 // mode = all, none, invert
1508 function selectTableRows(id, mode) {
1509         try {
1510                 var rows = $(id).rows;
1511
1512                 for (var i = 0; i < rows.length; i++) {
1513                         var row = rows[i];
1514                         var cb = false;
1515
1516                         if (row.id && row.className) {
1517                                 var bare_id = row.id.replace(/^[A-Z]*?-/, "");
1518                                 var inputs = rows[i].getElementsByTagName("input");
1519
1520                                 for (var j = 0; j < inputs.length; j++) {
1521                                         var input = inputs[j];
1522
1523                                         if (input.getAttribute("type") == "checkbox" &&
1524                                                         input.id.match(bare_id)) {
1525
1526                                                 cb = input;
1527                                                 break;
1528                                         }
1529                                 }
1530
1531                                 if (cb) {
1532                                         var issel = row.className.match("Selected");
1533
1534                                         if (mode == "all" && !issel) {
1535                                                 row.className += "Selected";
1536                                                 cb.checked = true;
1537                                         } else if (mode == "none" && issel) {
1538                                                 row.className = row.className.replace("Selected", "");
1539                                                 cb.checked = false;
1540                                         } else if (mode == "invert") {
1541
1542                                                 if (issel) {
1543                                                         row.className = row.className.replace("Selected", "");
1544                                                         cb.checked = false;
1545                                                 } else {
1546                                                         row.className += "Selected";
1547                                                         cb.checked = true;
1548                                                 }
1549                                         }
1550                                 }
1551                         }
1552                 }
1553
1554         } catch (e) {
1555                 exception_error("selectTableRows", e);
1556
1557         }
1558 }
1559
1560 function getSelectedTableRowIds(id) {
1561         var rows = [];
1562
1563         try {
1564                 var elem_rows = $(id).rows;
1565
1566                 for (i = 0; i < elem_rows.length; i++) {
1567                         if (elem_rows[i].className.match("Selected")) {
1568                                 var bare_id = elem_rows[i].id.replace(/^[A-Z]*?-/, "");
1569                                 rows.push(bare_id);
1570                         }
1571                 }
1572
1573         } catch (e) {
1574                 exception_error("getSelectedTableRowIds", e);
1575         }
1576
1577         return rows;
1578 }
1579