plugins/digest/digest.js

   1 var last_feeds = [];
   2 var init_params = {};
   3 var hotkeys_map = false;
   4 var hotkey_prefix = false;
   5 var mobile_mode = false;
   6
   7 var _active_feed_id = false;
   8 var _update_timeout = false;
   9 var _view_update_timeout = false;
  10 var _feedlist_expanded = false;
  11 var _update_seq = 1;
  12
  13 function article_appear(article_id) {
  14         try {
  15                 new Effect.Appear('A-' + article_id);
  16         } catch (e) {
  17                 exception_error("article_appear", e);
  18         }
  19 }
  20
  21 function catchup_feed(feed_id, callback) {
  22         try {
  23
  24                 var fn = find_feed(last_feeds, feed_id).title;
  25
  26                 if (confirm(__("Mark all articles in %s as read?").replace("%s", fn))) {
  27
  28                         var is_cat = "";
  29
  30                         if (feed_id < 0) is_cat = "true"; // KLUDGE
  31
  32                         var query = "op=rpc&method=catchupFeed&feed_id=" +
  33                                 feed_id + "&is_cat=" + is_cat;
  34
  35                         new Ajax.Request("backend.php", {
  36                                 parameters: query,
  37                                 onComplete: function(transport) {
  38                                         if (callback) callback(transport);
  39
  40                                         update();
  41                                 } });
  42                 }
  43
  44         } catch (e) {
  45                 exception_error("catchup_article", e);
  46         }
  47 }
  48
  49 function get_visible_article_ids() {
  50         try {
  51                 var elems = $("headlines-content").getElementsByTagName("LI");
  52                 var ids = [];
  53
  54                 for (var i = 0; i < elems.length; i++) {
  55                         if (elems[i].id && elems[i].id.match("A-")) {
  56                         ids.push(elems[i].id.replace("A-", ""));
  57                         }
  58                 }
  59
  60                 return ids;
  61
  62         } catch (e) {
  63                 exception_error("get_visible_article_ids", e);
  64         }
  65 }
  66
  67 function catchup_visible_articles(callback) {
  68         try {
  69
  70                 var ids = get_visible_article_ids();
  71
  72                 if (confirm(ngettext("Mark %d displayed article as read?", "Mark %d displayed articles as read?", ids.length).replace("%d", ids.length))) {
  73
  74                         var query = "op=rpc&method=catchupSelected" +
  75                                 "&cmode=0&ids=" + param_escape(ids);
  76
  77                         new Ajax.Request("backend.php", {
  78                                 parameters: query,
  79                                 onComplete: function(transport) {
  80                                         if (callback) callback(transport);
  81
  82                                         viewfeed(_active_feed_id, 0);
  83                                 } });
  84
  85                         }
  86
  87         } catch (e) {
  88                 exception_error("catchup_visible_articles", e);
  89         }
  90 }
  91
  92 function catchup_article(article_id, callback) {
  93         try {
  94                 var query = "op=rpc&method=catchupSelected" +
  95                         "&cmode=0&ids=" + article_id;
  96
  97                 new Ajax.Request("backend.php", {
  98                         parameters: query,
  99                         onComplete: function(transport) {
 100                                 if (callback) callback(transport);
 101                         } });
 102
 103         } catch (e) {
 104                 exception_error("catchup_article", e);
 105         }
 106 }
 107
 108 function set_selected_article(article_id) {
 109         try {
 110                 $$("#headlines-content > li[id*=A-]").each(function(article) {
 111                                 var id = article.id.replace("A-", "");
 112
 113                                 var cb = article.getElementsByTagName("INPUT")[0];
 114
 115                                 if (id == article_id) {
 116                                         article.addClassName("selected");
 117                                         cb.checked = true;
 118                                 } else {
 119                                         article.removeClassName("selected");
 120                                         cb.checked = false;
 121                                 }
 122
 123                 });
 124
 125         } catch (e) {
 126                 exception_error("set_selected_article", e);
 127         }
 128 }
 129
 130
 131 function set_selected_feed(feed_id) {
 132         try {
 133                 var feeds = $("feeds-content").getElementsByTagName("LI");
 134
 135                 for (var i = 0; i < feeds.length; i++) {
 136                         if (feeds[i].id == "F-" + feed_id)
 137                                 feeds[i].className = "selected";
 138                         else
 139                                 feeds[i].className = "";
 140                 }
 141
 142                 _active_feed_id = feed_id;
 143
 144         } catch (e) {
 145                 exception_error("set_selected_feed", e);
 146         }
 147 }
 148
 149 function load_more() {
 150         try {
 151                 var pr = $("H-LOADING-IMG");
 152
 153                 if (pr) Element.show(pr);
 154
 155                 var offset = $$("#headlines-content > li[id*=A-][class*=fresh],li[id*=A-][class*=unread]").length;
 156
 157                 viewfeed(false, offset, false, false, true,
 158                         function() {
 159                                 var pr = $("H-LOADING-IMG");
 160
 161                                 if (pr) Element.hide(pr);
 162                         });
 163         } catch (e) {
 164                 exception_error("load_more", e);
 165         }
 166 }
 167
 168 function update(callback) {
 169         try {
 170                 console.log('updating feeds...');
 171
 172                 window.clearTimeout(_update_timeout);
 173
 174                 new Ajax.Request("backend.php", {
 175                         parameters: "op=digest&method=digestinit",
 176                         onComplete: function(transport) {
 177                                 fatal_error_check(transport);
 178                                 parse_feeds(transport);
 179                                 set_selected_feed(_active_feed_id);
 180
 181                                 if (callback) callback(transport);
 182                                 } });
 183
 184                 _update_timeout = window.setTimeout('update()', 5*1000);
 185         } catch (e) {
 186                 exception_error("update", e);
 187         }
 188 }
 189
 190 function remove_headline_entry(article_id) {
 191         try {
 192                 var elem = $('A-' + article_id);
 193
 194                 if (elem) {
 195                         elem.parentNode.removeChild(elem);
 196                 }
 197
 198         } catch (e) {
 199                 exception_error("remove_headline_entry", e);
 200         }
 201 }
 202
 203 function view_update() {
 204         try {
 205                 viewfeed(_active_feed_id, _active_feed_offset, false, true, true);
 206                 update();
 207         } catch (e) {
 208                 exception_error("view_update", e);
 209         }
 210 }
 211
 212 function view(article_id) {
 213         try {
 214                 $("content").addClassName("move");
 215
 216                 var a = $("A-" + article_id);
 217                 var h = $("headlines");
 218
 219                 setTimeout(function() {
 220                         // below or above viewport, reposition headline
 221                         if (a.offsetTop > h.scrollTop + h.offsetHeight || a.offsetTop+a.offsetHeight < h.scrollTop+a.offsetHeight)
 222                                 h.scrollTop = a.offsetTop - (h.offsetHeight/2 - a.offsetHeight/2);
 223                         }, 500);
 224
 225                 new Ajax.Request("backend.php", {
 226                         parameters: "op=digest&method=digestgetcontents&article_id=" +
 227                                 article_id,
 228                         onComplete: function(transport) {
 229                                 fatal_error_check(transport);
 230
 231                                 var reply = JSON.parse(transport.responseText);
 232
 233                                 if (reply) {
 234                                         var article = reply['article'];
 235
 236                                         var mark_part = "";
 237                                         var publ_part = "";
 238
 239                                         var tags_part = "";
 240
 241                                         if (article.tags.length > 0) {
 242                                                 tags_part = " " + __("in") + " ";
 243
 244                                                 for (var i = 0; i < Math.min(5, article.tags.length); i++) {
 245                                                         //tags_part += "<a href=\"#\" onclick=\"viewfeed('" +
 246                                                         //              article.tags[i] + "')\">" +
 247                                                         //      article.tags[i] + "</a>, ";
 248
 249                                                         tags_part += article.tags[i] + ", ";
 250                                                 }
 251
 252                                                 tags_part = tags_part.replace(/, $/, "");
 253                                                 tags_part = "<span class=\"tags\">" + tags_part + "</span>";
 254
 255                                         }
 256
 257                                         if (article.marked)
 258                                                 mark_part = "<img title='"+ __("Unstar article")+"' onclick=\"toggle_mark(this, "+article.id+")\" src='images/mark_set.svg'>";
 259                                         else
 260                                                 mark_part =     "<img title='"+__("Star article")+"' onclick=\"toggle_mark(this, "+article.id+")\" src='images/mark_unset.svg'>";
 261
 262                                         if (article.published)
 263                                                 publ_part = "<img title='"+__("Unpublish article")+"' onclick=\"toggle_pub(this, "+article.id+")\" src='images/pub_set.svg'>";
 264                                         else
 265                                                 publ_part =     "<img title='"+__("Publish article")+"' onclick=\"toggle_pub(this, "+article.id+")\" src='images/pub_unset.svg'>";
 266
 267                                         var tmp = "<div id=\"inner\">" +
 268                                                 "<div id=\"ops\">" +
 269                                                 mark_part +
 270                                                 publ_part +
 271                                                 "</div>" +
 272                                                 "<h1>" + "<a target=\"_blank\" href=\""+article.url+"\">" +
 273                                                         article.title + "</a>" + "</h1>" +
 274                                                 "<div id=\"tags\">" +
 275                                                 tags_part +
 276                                                 "</div>" +
 277                                                 article.content + "</div>";
 278
 279                                         $("article-content").innerHTML = tmp;
 280                                         $("article").addClassName("visible");
 281
 282                                         set_selected_article(article.id);
 283
 284                                         catchup_article(article_id,
 285                                                 function() {
 286                                                         $("A-" + article_id).addClassName("read");
 287                                         });
 288
 289                                 } else {
 290                                         elem.innerHTML = __("Error: unable to load article.");
 291                                 }
 292                         }
 293                 });
 294
 295
 296                 return false;
 297         } catch (e) {
 298                 exception_error("view", e);
 299         }
 300 }
 301
 302 function close_feed() {
 303         $("headlines").removeClassName("move");
 304
 305         if (mobile_mode) set_selected_feed(false);
 306 }
 307
 308 function go_back() {
 309         if ($("article").hasClassName("visible")) {
 310                 close_article();
 311         } else {
 312                 close_feed();
 313         }
 314 }
 315
 316 function close_article() {
 317         $("content").removeClassName("move");
 318         $("article").removeClassName("visible");
 319 }
 320
 321 function viewfeed(feed_id, offset, replace, no_effects, no_indicator, callback) {
 322         try {
 323
 324                 $("headlines").addClassName("move");
 325
 326                 if (!feed_id) feed_id = _active_feed_id;
 327                 if (offset == undefined) offset = 0;
 328                 if (replace == undefined) replace = (offset == 0);
 329
 330                 _update_seq = _update_seq + 1;
 331
 332                 if (!offset) $("headlines").scrollTop = 0;
 333
 334                 var query = "op=digest&method=digestupdate&feed_id=" +
 335                                 param_escape(feed_id) + "&offset=" + offset +
 336                                 "&seq=" + _update_seq;
 337
 338                 console.log(query);
 339
 340                 var img = false;
 341
 342                 if ($("F-" + feed_id)) {
 343                         img = $("F-" + feed_id).getElementsByTagName("IMG")[0];
 344
 345                         if (img && !no_indicator) {
 346                                 img.setAttribute("orig_src", img.src);
 347                                 img.src = 'images/indicator_tiny.gif';
 348                         }
 349                 }
 350
 351                 new Ajax.Request("backend.php", {
 352                         parameters: query,
 353                         onComplete: function(transport) {
 354                                 Element.hide("overlay");
 355
 356                                 fatal_error_check(transport);
 357                                 parse_headlines(transport, replace, no_effects);
 358                                 set_selected_feed(feed_id);
 359                                 _active_feed_offset = offset;
 360
 361                                 if (img && !no_indicator)
 362                                         img.src = img.getAttribute("orig_src");
 363
 364                                 if (callback) callback(transport);
 365
 366                         } });
 367
 368         } catch (e) {
 369                 exception_error("view", e);
 370         }
 371 }
 372
 373 function find_article(articles, article_id) {
 374         try {
 375                 for (var i = 0; i < articles.length; i++) {
 376                         if (articles[i].id == article_id)
 377                                 return articles[i];
 378                 }
 379
 380                 return false;
 381
 382         } catch (e) {
 383                 exception_error("find_article", e);
 384         }
 385 }
 386
 387 function find_feed(feeds, feed_id) {
 388         try {
 389                 for (var i = 0; i < feeds.length; i++) {
 390                         if (feeds[i].id == feed_id)
 391                                 return feeds[i];
 392                 }
 393
 394                 return false;
 395
 396         } catch (e) {
 397                 exception_error("find_feed", e);
 398         }
 399 }
 400
 401 function get_feed_icon(feed) {
 402         try {
 403                 if (feed.has_icon)
 404                         return getInitParam('icons_url') + "/" + feed.id + '.ico';
 405
 406                 if (feed.id == -1)
 407                         return 'images/mark_set.svg';
 408
 409                 if (feed.id == -2)
 410                         return 'images/pub_set.svg';
 411
 412                 if (feed.id == -3)
 413                         return 'images/fresh.png';
 414
 415                 if (feed.id == -4)
 416                         return 'images/tag.png';
 417
 418                 if (feed.id < -10)
 419                         return 'images/label.png';
 420
 421                 return 'images/blank_icon.gif';
 422
 423         } catch (e) {
 424                 exception_error("get_feed_icon", e);
 425         }
 426 }
 427
 428 function add_feed_entry(feed) {
 429         try {
 430                 var icon_part = "";
 431
 432                 icon_part = "<img src='" + get_feed_icon(feed) + "'/>";
 433
 434                 var title = (feed.title.length > 30) ?
 435                         feed.title.substring(0, 30) + "&hellip;" :
 436                         feed.title;
 437
 438                 var tmp_html = "<li id=\"F-"+feed.id+"\" onclick=\"viewfeed("+feed.id+")\">" +
 439                         "<div class='unread-ctr'>" + "<span class=\"unread\">" + feed.unread + "</span></div>" +
 440                         icon_part + title +
 441                         "</li>";
 442
 443                 $("feeds-content").innerHTML += tmp_html;
 444
 445
 446         } catch (e) {
 447                 exception_error("add_feed_entry", e);
 448         }
 449 }
 450
 451 function add_headline_entry(article, feed, no_effects) {
 452         try {
 453
 454                 var icon_part = "";
 455
 456                 icon_part = "<img class='icon' src='" + get_feed_icon(feed) + "'/>";
 457
 458
 459                 var style = "";
 460
 461                 //if (!no_effects) style = "style=\"display : none\"";
 462
 463                 if (article.excerpt.trim() == "")
 464                         article.excerpt = __("Click to expand article.");
 465
 466                 var li_class = "unread";
 467
 468                 var fresh_max = getInitParam("fresh_article_max_age") * 60 * 60;
 469                 var d = new Date();
 470
 471                 if (d.getTime() / 1000 - article.updated < fresh_max)
 472                         li_class = "fresh";
 473
 474                 var checkbox_part = "<input type=\"checkbox\" class=\"cb\" onclick=\"toggle_select_article(this)\"/>";
 475
 476                 var date = new Date(article.updated * 1000);
 477
 478                 var date_part = date.toString().substring(0,21);
 479
 480                 var tmp_html = "<li id=\"A-"+article.id+"\" "+style+" class=\""+li_class+"\">" +
 481                         checkbox_part +
 482                         icon_part +
 483                         "<a target=\"_blank\" href=\""+article.link+"\""+
 484                                 "onclick=\"return view("+article.id+")\" class='title'>" +
 485                                 article.title + "</a>" +
 486                         "<div class='body'>" +
 487                         "<div onclick=\"view("+article.id+")\" class='excerpt'>" +
 488                                 article.excerpt + "</div>" +
 489                         "<div onclick=\"view("+article.id+")\" class='info'>";
 490
 491 /*              tmp_html += "<a href=\#\" onclick=\"viewfeed("+feed.id+")\">" +
 492                                         feed.title + "</a> " + " @ "; */
 493
 494                 tmp_html += date_part + "</div>" +
 495                         "</div></li>";
 496
 497                 $("headlines-content").innerHTML += tmp_html;
 498
 499                 if (!no_effects)
 500                         window.setTimeout('article_appear(' + article.id + ')', 100);
 501
 502         } catch (e) {
 503                 exception_error("add_headline_entry", e);
 504         }
 505 }
 506
 507 function expand_feeds() {
 508         try {
 509                 _feedlist_expanded = true;
 510
 511                 redraw_feedlist(last_feeds);
 512
 513         } catch (e) {
 514                 exception_error("expand_feeds", e);
 515         }
 516 }
 517
 518 function redraw_feedlist(feeds) {
 519         try {
 520
 521                 $('feeds-content').innerHTML = "";
 522
 523                 var limit = 10;
 524
 525                 if (_feedlist_expanded) limit = feeds.length;
 526
 527                 for (var i = 0; i < Math.min(limit, feeds.length); i++) {
 528                         add_feed_entry(feeds[i]);
 529                 }
 530
 531                 if (feeds.length > limit) {
 532                         $('feeds-content').innerHTML += "<li id='F-MORE-PROMPT'>" +
 533                                 "<img src='images/blank_icon.gif'>" +
 534                                 "<a href=\"#\" onclick=\"expand_feeds()\">" +
 535                                 ngettext("%d more...", "%d more...", feeds.length-10).replace("%d", feeds.length-10) +
 536                                 "</a>" + "</li>";
 537                 }
 538
 539                 if (feeds.length == 0) {
 540                         $('feeds-content').innerHTML =
 541                                 "<div class='insensitive' style='text-align : center'>" +
 542                                         __("No unread feeds.") + "</div>";
 543                 }
 544
 545                 if (_active_feed_id)
 546                         set_selected_feed(_active_feed_id);
 547
 548         } catch (e) {
 549                 exception_error("redraw_feedlist", e);
 550         }
 551 }
 552
 553 function parse_feeds(transport) {
 554         try {
 555                 var reply = JSON.parse(transport.responseText);
 556
 557                 if (!reply) return;
 558
 559                 var feeds = reply['feeds'];
 560
 561                 if (feeds) {
 562
 563                         feeds.sort( function (a,b)
 564                                 {
 565                                         if (b.unread != a.unread)
 566                                                 return (b.unread - a.unread);
 567                                         else
 568                                                 if (a.title > b.title)
 569                                                         return 1;
 570                                                 else if (a.title < b.title)
 571                                                         return -1;
 572                                                 else
 573                                                         return 0;
 574                                 });
 575
 576                         var all_articles = find_feed(feeds, -4);
 577
 578                         update_title(all_articles.unread);
 579
 580                         last_feeds = feeds;
 581
 582                         redraw_feedlist(feeds);
 583                 }
 584
 585                 if (reply['hotkeys']) {
 586                         hotkeys_map = reply['hotkeys'];
 587                 }
 588
 589         } catch (e) {
 590                 console.log(e);
 591                 //exception_error("parse_feeds", e);
 592         }
 593 }
 594
 595 function parse_headlines(transport, replace, no_effects) {
 596         try {
 597                 var reply = JSON.parse(transport.responseText);
 598                 if (!reply) return;
 599
 600                 var seq = reply['seq'];
 601
 602                 if (seq) {
 603                         if (seq != _update_seq) {
 604                                 console.log("parse_headlines: wrong sequence received.");
 605                                 return;
 606                         }
 607                 } else {
 608                         return;
 609                 }
 610
 611                 var headlines = reply['headlines']['content'];
 612                 var headlines_title = reply['headlines']['title'];
 613
 614                 if (headlines && headlines_title) {
 615
 616                         if (replace) {
 617                                 $('headlines-content').innerHTML = '';
 618                         }
 619
 620                         var pr = $('H-MORE-PROMPT');
 621
 622                         if (pr) pr.parentNode.removeChild(pr);
 623
 624                         var inserted = false;
 625
 626                         for (var i = 0; i < headlines.length; i++) {
 627
 628                                 if (!$('A-' + headlines[i].id)) {
 629                                         add_headline_entry(headlines[i],
 630                                                         find_feed(last_feeds, headlines[i].feed_id), !no_effects);
 631
 632                                 }
 633                         }
 634
 635                         console.log(inserted.id);
 636
 637                         var ids = get_visible_article_ids();
 638
 639                         if (ids.length > 0) {
 640                                 if (pr) {
 641                                         $('headlines-content').appendChild(pr);
 642
 643                                 } else {
 644                                         $('headlines-content').innerHTML += "<li id='H-MORE-PROMPT'>" +
 645                                                 "<div class='body'>" +
 646                                                 "<a href=\"#\" onclick=\"catchup_visible_articles()\">" +
 647                                                 __("Mark as read") + "</a> | " +
 648                                                 "<a href=\"javascript:load_more()\">" +
 649                                                 __("Load more...") + "</a>" +
 650                                                 "<img style=\"display : none\" "+
 651                                                 "id=\"H-LOADING-IMG\" src='images/indicator_tiny.gif'>" +
 652                                                 "</div></li>";
 653                                 }
 654                         } else {
 655                                 // FIXME : display some kind of "nothing to see here" prompt here
 656                         }
 657
 658 //                      if (replace && !no_effects)
 659 //                              new Effect.Appear('headlines-content', {duration : 0.3});
 660
 661                         //new Effect.Appear('headlines-content');
 662                 }
 663
 664         } catch (e) {
 665                 exception_error("parse_headlines", e);
 666         }
 667 }
 668
 669 function init_second_stage() {
 670         try {
 671                 new Ajax.Request("backend.php", {
 672                         parameters: "op=digest&method=digestinit&init=1",
 673                         onComplete: function(transport) {
 674                                 parse_feeds(transport);
 675                                 Element.hide("overlay");
 676
 677                                 document.onkeydown = hotkey_handler;
 678
 679                                 if (!mobile_mode)
 680                                         window.setTimeout('viewfeed(-4)', 100);
 681                                         _update_timeout = window.setTimeout('update()', 5*1000);
 682                                         } });
 683
 684         } catch (e) {
 685                 exception_error("init_second_stage", e);
 686         }
 687 }
 688
 689 function init(mobile) {
 690         try {
 691                 mobile_mode = mobile;
 692
 693                 new Ajax.Request("backend.php", {
 694                         parameters: {op: "rpc", method: "sanityCheck"},
 695                         onComplete: function(transport) {
 696                                 backend_sanity_check_callback(transport);
 697                         } });
 698
 699         } catch (e) {
 700                 exception_error("digest_init", e);
 701         }
 702 }
 703
 704 function toggle_mark(img, id) {
 705
 706         try {
 707
 708                 var query = "op=rpc&id=" + id + "&method=mark";
 709
 710                 if (!img) return;
 711
 712                 if (img.src.match("mark_unset")) {
 713                         img.src = img.src.replace("mark_unset", "mark_set");
 714                         img.alt = __("Unstar article");
 715                         query = query + "&mark=1";
 716                 } else {
 717                         img.src = img.src.replace("mark_set", "mark_unset");
 718                         img.alt = __("Star article");
 719                         query = query + "&mark=0";
 720                 }
 721
 722                 new Ajax.Request("backend.php", {
 723                         parameters: query,
 724                         onComplete: function(transport) {
 725                                 update();
 726                         } });
 727
 728         } catch (e) {
 729                 exception_error("toggle_mark", e);
 730         }
 731 }
 732
 733 function toggle_pub(img, id, note) {
 734
 735         try {
 736
 737                 var query = "op=rpc&id=" + id + "&method=publ";
 738
 739                 if (note != undefined) {
 740                         query = query + "&note=" + param_escape(note);
 741                 } else {
 742                         query = query + "&note=undefined";
 743                 }
 744
 745                 if (!img) return;
 746
 747                 if (img.src.match("pub_unset") || note != undefined) {
 748                         img.src = img.src.replace("pub_unset", "pub_set");
 749                         img.alt = __("Unpublish article");
 750                         query = query + "&pub=1";
 751
 752                 } else {
 753                         img.src = img.src.replace("pub_set", "pub_unset");
 754                         img.alt = __("Publish article");
 755                         query = query + "&pub=0";
 756                 }
 757
 758                 new Ajax.Request("backend.php", {
 759                         parameters: query,
 760                         onComplete: function(transport) {
 761                                 update();
 762                         } });
 763
 764         } catch (e) {
 765                 exception_error("toggle_pub", e);
 766         }
 767 }
 768
 769 function fatal_error(code, msg) {
 770         try {
 771
 772                 if (code == 6) {
 773                         window.location.href = "digest.php";
 774                 } else if (code == 5) {
 775                         window.location.href = "db-updater.php";
 776                 } else {
 777
 778                         if (msg == "") msg = "Unknown error";
 779
 780                         console.error("Fatal error: " + code + "\n" +
 781                                 msg);
 782
 783                 }
 784
 785         } catch (e) {
 786                 exception_error("fatalError", e);
 787         }
 788 }
 789
 790 function fatal_error_check(transport) {
 791         try {
 792                 if (transport.responseXML) {
 793                         var error = transport.responseXML.getElementsByTagName("error")[0];
 794
 795                         if (error) {
 796                                 var code = error.getAttribute("error-code");
 797                                 var msg = error.getAttribute("error-msg");
 798                                 if (code != 0) {
 799                                         fatal_error(code, msg);
 800                                         return false;
 801                                 }
 802                         }
 803                 }
 804         } catch (e) {
 805                 exception_error("fatal_error_check", e);
 806         }
 807         return true;
 808 }
 809
 810 function update_title(unread) {
 811         try {
 812                 document.title = "Tiny Tiny RSS";
 813
 814                 if (unread > 0)
 815                         document.title += " (" + unread + ")";
 816
 817         } catch (e) {
 818                 exception_error("update_title", e);
 819         }
 820 }
 821
 822 function toggle_select_article(elem) {
 823         try {
 824                 var article = elem.parentNode;
 825
 826                 if (article.hasClassName("selected"))
 827                         article.removeClassName("selected");
 828                 else
 829                         article.addClassName("selected");
 830
 831         } catch (e) {
 832                 exception_error("toggle_select_article", e);
 833         }
 834 }
 835
 836 function hotkey_handler(e) {
 837         try {
 838
 839                 if (e.target.nodeName == "INPUT" || e.target.nodeName == "TEXTAREA") return;
 840
 841                 var keycode = false;
 842                 var shift_key = false;
 843
 844                 var cmdline = $('cmdline');
 845
 846                 try {
 847                         shift_key = e.shiftKey;
 848                 } catch (e) {
 849
 850                 }
 851
 852                 if (window.event) {
 853                         keycode = window.event.keyCode;
 854                 } else if (e) {
 855                         keycode = e.which;
 856                 }
 857
 858                 var keychar = String.fromCharCode(keycode);
 859
 860                 if (!shift_key) keychar = keychar.toLowerCase();
 861
 862                 if (keycode == 16) return; // ignore lone shift
 863                 if (keycode == 17) return; // ignore lone ctrl
 864
 865                 var hotkey = keychar.search(/[a-zA-Z0-9]/) != -1 ? keychar : "(" + keycode + ")";
 866                 hotkey = hotkey_prefix ? hotkey_prefix + " " + hotkey : hotkey;
 867                 hotkey_prefix = false;
 868
 869                 var hotkey_action = false;
 870                 var hotkeys = getInitParam("hotkeys");
 871
 872                 for (sequence in hotkeys[1]) {
 873                         if (sequence == hotkey) {
 874                                 hotkey_action = hotkeys[1][sequence];
 875                                 break;
 876                         }
 877                 }
 878
 879                 switch (keycode) {
 880                 case 27: // esc
 881                         go_back();
 882                         return false;
 883                 }
 884
 885                 switch (hotkey_action) {
 886                 case "next_feed":
 887                         var feeds = $$("#feeds li");
 888                         for (var i = 0; i < feeds.length; i++) {
 889                                 var base_id = feeds[i].id.replace("F-", "");
 890
 891                                 if (base_id == _active_feed_id) {
 892                                         if (feeds[i+1]) {
 893                                                 viewfeed(feeds[i+1].id.replace("F-", ""));
 894                                         }
 895                                         break;
 896                                 }
 897                         }
 898                         return false;
 899                 case "prev_feed":
 900                         var feeds = $$("#feeds li");
 901                         for (var i = 0; i < feeds.length; i++) {
 902                                 var base_id = feeds[i].id.replace("F-", "");
 903
 904                                 if (base_id == _active_feed_id) {
 905                                         if (feeds[i-1]) {
 906                                                 viewfeed(feeds[i-1].id.replace("F-", ""));
 907                                         }
 908                                         break;
 909                                 }
 910                         }
 911                         return false;
 912                 case "next_article":
 913                         return false;
 914                 case "prev_article":
 915                         return false;
 916                 default:
 917                         console.log("unhandled action: " + hotkey_action + "; hotkey: " + hotkey);
 918                 }
 919
 920
 921         } catch (e) {
 922                 exception_error("hotkey_handler", e);
 923         }
 924 }