viewfeed.js

   1 var active_post_id = false;
   2 var _catchup_callback_func = false;
   3 var last_article_view = false;
   4 var active_real_feed_id = false;
   5
   6 var _tag_active_post_id = false;
   7 var _tag_active_feed_id = false;
   8 var _tag_active_cdm = false;
   9
  10 // FIXME: kludge, to restore scrollTop after tag editor terminates
  11 var _tag_cdm_scroll = false;
  12
  13 // FIXME: kludges, needs proper implementation
  14 var _reload_feedlist_after_view = false;
  15
  16 var _cdm_wd_timeout = false;
  17 var _cdm_wd_vishist = new Array();
  18
  19 var article_cache = new Array();
  20
  21 function catchup_callback() {
  22         if (xmlhttp_rpc.readyState == 4) {
  23                 try {
  24                         debug("catchup_callback");
  25                         if (_catchup_callback_func) {
  26                                 setTimeout(_catchup_callback_func, 100);
  27                         }
  28                         notify("");
  29                         all_counters_callback();
  30                 } catch (e) {
  31                         exception_error("catchup_callback", e);
  32                 }
  33         }
  34 }
  35
  36 function headlines_callback() {
  37         if (xmlhttp.readyState == 4) {
  38                 debug("headlines_callback");
  39                 var f = document.getElementById("headlines-frame");
  40                 try {
  41                         f.scrollTop = 0;
  42                 } catch (e) { };
  43
  44                 if (xmlhttp.responseXML) {
  45                         var headlines = xmlhttp.responseXML.getElementsByTagName("headlines")[0];
  46                         var counters = xmlhttp.responseXML.getElementsByTagName("counters")[0];
  47                         var articles = xmlhttp.responseXML.getElementsByTagName("article");
  48
  49                         f.innerHTML = headlines.firstChild.nodeValue;
  50
  51                         if (articles) {
  52                                 for (var i = 0; i < articles.length; i++) {
  53                                         var a_id = articles[i].getAttribute("id");
  54                                         debug("found id: " + a_id);
  55                                         cache_inject(a_id, articles[i].firstChild.nodeValue);
  56                                 }
  57                         }
  58
  59                         if (counters) {
  60                                 debug("parsing piggybacked counters: " + counters);
  61                                 parse_counters(counters, false);
  62                         } else {
  63                                 debug("counters container not found in reply");
  64                         }
  65                 } else {
  66                         debug("headlines_callback: returned no XML object");
  67                         f.innerHTML = "<div class='whiteBox'>" + __('Could not update headlines (missing XML object)') + "</div>";
  68                 }
  69
  70                 if (typeof correctPNG != 'undefined') {
  71                         correctPNG();
  72                 }
  73
  74                 if (_cdm_wd_timeout) window.clearTimeout(_cdm_wd_timeout);
  75
  76                 if (!document.getElementById("headlinesList") &&
  77                                 getInitParam("cdm_auto_catchup") == 1) {
  78                         debug("starting CDM watchdog");
  79                         _cdm_wd_timeout = window.setTimeout("cdmWatchdog()", 5000);
  80                         _cdm_wd_vishist = new Array();
  81                 } else {
  82                         debug("not in CDM mode or watchdog disabled");
  83                 }
  84
  85                 if (_tag_cdm_scroll) {
  86                         try {
  87                                 document.getElementById("headlinesInnerContainer").scrollTop = _tag_cdm_scroll;
  88                                 _tag_cdm_scroll = false;
  89                         } catch (e) { }
  90                 }
  91
  92                 notify("");
  93         }
  94 }
  95
  96 function render_article(article) {
  97         try {
  98                 var f = document.getElementById("content-frame");
  99                 try {
 100                         f.scrollTop = 0;
 101                 } catch (e) { };
 102
 103                 f.innerHTML = article;
 104
 105         } catch (e) {
 106                 exception_error("render_article", e);
 107         }
 108 }
 109
 110 function article_callback() {
 111         if (xmlhttp.readyState == 4) {
 112                 debug("article_callback");
 113
 114                 try {
 115                         if (xmlhttp.responseXML) {
 116                                 var reply = xmlhttp.responseXML.firstChild.firstChild;
 117
 118                                 var articles = xmlhttp.responseXML.getElementsByTagName("article");
 119
 120                                 for (var i = 0; i < articles.length; i++) {
 121                                         var a_id = articles[i].getAttribute("id");
 122
 123                                         debug("found id: " + a_id);
 124
 125                                         if (a_id == active_post_id) {
 126                                                 debug("active article, rendering...");
 127                                                 render_article(articles[i].firstChild.nodeValue);
 128                                         }
 129
 130                                         cache_inject(a_id, articles[i].firstChild.nodeValue);
 131                                 }
 132
 133                         } else {
 134                                 debug("article_callback: returned no XML object");
 135                                 var f = document.getElementById("content-frame");
 136                                 f.innerHTML = "<div class='whiteBox'>" + __('Could not display article (missing XML object)') + "</div>";
 137                         }
 138                 } catch (e) {
 139                         exception_error("article_callback", e);
 140                 }
 141
 142                 var date = new Date();
 143                 last_article_view = date.getTime() / 1000;
 144
 145                 if (typeof correctPNG != 'undefined') {
 146                         correctPNG();
 147                 }
 148
 149                 if (_reload_feedlist_after_view) {
 150                         setTimeout('updateFeedList(false, false)', 50);
 151                         _reload_feedlist_after_view = false;
 152                 } else {
 153                         var counters = xmlhttp.responseXML.getElementsByTagName("counters")[0];
 154
 155                         if (counters) {
 156                                 debug("parsing piggybacked counters: " + counters);
 157                                 parse_counters(counters, false);
 158                         } else {
 159                                 debug("counters container not found in reply");
 160                         }
 161                 }
 162
 163                 notify("");
 164         }
 165 }
 166
 167 function view(id, feed_id, skip_history) {
 168
 169         try {
 170                 debug("loading article: " + id + "/" + feed_id);
 171
 172                 active_real_feed_id = feed_id;
 173
 174                 var cached_article = cache_find(id);
 175
 176                 debug("cache check result: " + (cached_article != false));
 177
 178 /*              if (!skip_history) {
 179                         history_push("ARTICLE:" + id + ":" + feed_id);
 180                 } */
 181
 182                 enableHotkeys();
 183
 184                 //setActiveFeedId(feed_id);
 185
 186                 var query = "backend.php?op=view&id=" + param_escape(id) +
 187                         "&feed=" + param_escape(feed_id);
 188
 189                 var date = new Date();
 190
 191                 if (!xmlhttp_ready(xmlhttp) && last_article_view < date.getTime() / 1000 - 15) {
 192                         debug("<b>xmlhttp seems to be stuck at view, aborting</b>");
 193                         xmlhttp.abort();
 194                 }
 195
 196                 if (xmlhttp_ready(xmlhttp)) {
 197
 198                         active_post_id = id;
 199
 200                         cleanSelected("headlinesList");
 201
 202                         var crow = document.getElementById("RROW-" + active_post_id);
 203
 204                         var article_is_unread = crow.className.match("Unread");
 205                         debug("article is unread: " + article_is_unread);
 206
 207                         crow.className = crow.className.replace("Unread", "");
 208
 209                         var upd_img_pic = document.getElementById("FUPDPIC-" + active_post_id);
 210
 211                         if (upd_img_pic) {
 212                                 upd_img_pic.src = "images/blank_icon.gif";
 213                         }
 214
 215                         selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', false);
 216                         markHeadline(active_post_id);
 217
 218                         var neighbor_ids = getRelativePostIds(active_post_id);
 219
 220                         /* only request uncached articles */
 221
 222                         var cids_to_request = Array();
 223
 224                         for (var i = 0; i < neighbor_ids.length; i++) {
 225                                 if (!cache_check(neighbor_ids[i])) {
 226                                         cids_to_request.push(neighbor_ids[i]);
 227                                 }
 228                         }
 229
 230                         debug("additional ids: " + cids_to_request.toString());
 231
 232                         /* additional info for piggyback counters */
 233
 234                         if (tagsAreDisplayed()) {
 235                                 query = query + "&omode=lt";
 236                         } else {
 237                                 query = query + "&omode=flc";
 238                         }
 239
 240                         var date = new Date();
 241                         var timestamp = Math.round(date.getTime() / 1000);
 242                         query = query + "&ts=" + timestamp;
 243
 244                         query = query + "&cids=" + cids_to_request.toString();
 245
 246                         if (!cached_article) {
 247
 248                                 notify_progress("Loading, please wait...");
 249
 250                                 debug(query);
 251
 252                                 xmlhttp.open("GET", query, true);
 253                                 xmlhttp.onreadystatechange=article_callback;
 254                                 xmlhttp.send(null);
 255                         } else if (cached_article && article_is_unread) {
 256
 257                                 query = query + "&mode=prefetch";
 258
 259                                 debug(query);
 260
 261                                 xmlhttp.open("GET", query, true);
 262                                 xmlhttp.onreadystatechange=article_callback;
 263                                 xmlhttp.send(null);
 264
 265                                 render_article(cached_article);
 266
 267                         } else if (cached_article) {
 268
 269                                 query = query + "&mode=prefetch_old";
 270
 271                                 debug(query);
 272
 273                                 xmlhttp.open("GET", query, true);
 274                                 xmlhttp.onreadystatechange=article_callback;
 275                                 xmlhttp.send(null);
 276
 277                                 render_article(cached_article);
 278
 279                         }
 280
 281                         cache_expire();
 282
 283                 } else {
 284                         debug("xmlhttp busy (@view)");
 285                         printLockingError();
 286                 }
 287
 288         } catch (e) {
 289                 exception_error("view", e);
 290         }
 291 }
 292
 293 function tMark(id) {
 294         return toggleMark(id);
 295 }
 296
 297 function toggleMark(id) {
 298
 299         if (!xmlhttp_ready(xmlhttp_rpc)) {
 300                 printLockingError();
 301                 return;
 302         }
 303
 304         var query = "backend.php?op=rpc&id=" + id + "&subop=mark";
 305
 306         var mark_img = document.getElementById("FMPIC-" + id);
 307         var vfeedu = document.getElementById("FEEDU--1");
 308         var crow = document.getElementById("RROW-" + id);
 309
 310         if (mark_img.alt != "Reset mark") {
 311                 mark_img.src = "images/mark_set.png";
 312                 mark_img.alt = "Reset mark";
 313                 query = query + "&mark=1";
 314
 315                 if (vfeedu && crow.className.match("Unread")) {
 316                         vfeedu.innerHTML = (+vfeedu.innerHTML) + 1;
 317                 }
 318
 319         } else {
 320                 mark_img.src = "images/mark_unset.png";
 321                 mark_img.alt = "Set mark";
 322                 query = query + "&mark=0";
 323
 324                 if (vfeedu && crow.className.match("Unread")) {
 325                         vfeedu.innerHTML = (+vfeedu.innerHTML) - 1;
 326                 }
 327
 328         }
 329
 330         var vfeedctr = document.getElementById("FEEDCTR--1");
 331         var vfeedr = document.getElementById("FEEDR--1");
 332
 333         if (vfeedu && vfeedctr) {
 334                 if ((+vfeedu.innerHTML) > 0) {
 335                         if (crow.className.match("Unread") && !vfeedr.className.match("Unread")) {
 336                                 vfeedr.className = vfeedr.className + "Unread";
 337                                 vfeedctr.className = "odd";
 338                         }
 339                 } else {
 340                         vfeedctr.className = "invisible";
 341                         vfeedr.className = vfeedr.className.replace("Unread", "");
 342                 }
 343         }
 344
 345         debug("toggle starred for aid " + id);
 346
 347         new Ajax.Request(query);
 348
 349 }
 350
 351 function correctHeadlinesOffset(id) {
 352
 353         try {
 354
 355                 var hlist = document.getElementById("headlinesList");
 356                 var container = document.getElementById("headlinesInnerContainer");
 357                 var row = document.getElementById("RROW-" + id);
 358
 359                 var viewport = container.offsetHeight;
 360
 361                 var rel_offset_top = row.offsetTop - container.scrollTop;
 362                 var rel_offset_bottom = row.offsetTop + row.offsetHeight - container.scrollTop;
 363
 364                 debug("Rtop: " + rel_offset_top + " Rbtm: " + rel_offset_bottom);
 365                 debug("Vport: " + viewport);
 366
 367                 if (rel_offset_top <= 0 || rel_offset_top > viewport) {
 368                         container.scrollTop = row.offsetTop;
 369                 } else if (rel_offset_bottom > viewport) {
 370
 371                         /* doesn't properly work with Opera in some cases because
 372                                 Opera fucks up element scrolling */
 373
 374                         container.scrollTop = row.offsetTop + row.offsetHeight - viewport;
 375                 }
 376
 377         } catch (e) {
 378                 exception_error("correctHeadlinesOffset", e);
 379         }
 380
 381 }
 382
 383 function moveToPost(mode) {
 384
 385         // check for combined mode
 386         if (!document.getElementById("headlinesList"))
 387                 return;
 388
 389         var rows = getVisibleHeadlineIds();
 390
 391         var prev_id = false;
 392         var next_id = false;
 393
 394         if (!document.getElementById('RROW-' + active_post_id)) {
 395                 active_post_id = false;
 396         }
 397
 398         if (active_post_id == false) {
 399                 next_id = getFirstVisibleHeadlineId();
 400                 prev_id = getLastVisibleHeadlineId();
 401         } else {
 402                 for (var i = 0; i < rows.length; i++) {
 403                         if (rows[i] == active_post_id) {
 404                                 prev_id = rows[i-1];
 405                                 next_id = rows[i+1];
 406                         }
 407                 }
 408         }
 409
 410         if (mode == "next") {
 411                 if (next_id) {
 412                         correctHeadlinesOffset(next_id);
 413                         view(next_id, getActiveFeedId());
 414                 }
 415         }
 416
 417         if (mode == "prev") {
 418                 if (prev_id) {
 419                         correctHeadlinesOffset(prev_id);
 420                         view(prev_id, getActiveFeedId());
 421                 }
 422         }
 423 }
 424
 425 function toggleUnread(id, cmode) {
 426         try {
 427                 if (!xmlhttp_ready(xmlhttp_rpc)) {
 428                         printLockingError();
 429                         return;
 430                 }
 431
 432                 var row = document.getElementById("RROW-" + id);
 433                 if (row) {
 434                         var nc = row.className;
 435                         nc = nc.replace("Unread", "");
 436                         nc = nc.replace("Selected", "");
 437
 438                         if (row.className.match("Unread")) {
 439                                 row.className = nc;
 440                         } else {
 441                                 row.className = nc + "Unread";
 442                         }
 443
 444                         if (!cmode) cmode = 2;
 445
 446                         var query = "backend.php?op=rpc&subop=catchupSelected&ids=" +
 447                                 param_escape(id) + "&cmode=" + param_escape(cmode);
 448
 449                         notify_progress("Loading, please wait...");
 450
 451                         xmlhttp_rpc.open("GET", query, true);
 452                         xmlhttp_rpc.onreadystatechange=all_counters_callback;
 453                         xmlhttp_rpc.send(null);
 454
 455                 }
 456
 457
 458         } catch (e) {
 459                 exception_error("toggleUnread", e);
 460         }
 461 }
 462
 463 function selectionToggleUnread(cdm_mode, set_state, callback_func, no_error) {
 464         try {
 465                 if (!xmlhttp_ready(xmlhttp_rpc)) {
 466                         printLockingError();
 467                         return;
 468                 }
 469
 470                 var rows;
 471
 472                 if (cdm_mode) {
 473                         rows = cdmGetSelectedArticles();
 474                 } else {
 475                         rows = getSelectedTableRowIds("headlinesList", "RROW", "RCHK");
 476                 }
 477
 478                 if (rows.length == 0 && !no_error) {
 479                         alert(__("No articles are selected."));
 480                         return;
 481                 }
 482
 483                 for (i = 0; i < rows.length; i++) {
 484                         var row = document.getElementById("RROW-" + rows[i]);
 485                         if (row) {
 486                                 var nc = row.className;
 487                                 nc = nc.replace("Unread", "");
 488                                 nc = nc.replace("Selected", "");
 489
 490                                 if (row.className.match("Unread")) {
 491                                         row.className = nc + "Selected";
 492                                 } else {
 493                                         row.className = nc + "UnreadSelected";
 494                                 }
 495                         }
 496                 }
 497
 498                 if (rows.length > 0) {
 499
 500                         var cmode = "";
 501
 502                         if (set_state == undefined) {
 503                                 cmode = "2";
 504                         } else if (set_state == true) {
 505                                 cmode = "1";
 506                         } else if (set_state == false) {
 507                                 cmode = "0";
 508                         }
 509
 510                         var query = "backend.php?op=rpc&subop=catchupSelected&ids=" +
 511                                 param_escape(rows.toString()) + "&cmode=" + cmode;
 512
 513                         _catchup_callback_func = callback_func;
 514
 515                         notify_progress("Loading, please wait...");
 516
 517                         xmlhttp_rpc.open("GET", query, true);
 518                         xmlhttp_rpc.onreadystatechange=catchup_callback;
 519                         xmlhttp_rpc.send(null);
 520
 521                 }
 522
 523         } catch (e) {
 524                 exception_error("selectionToggleUnread", e);
 525         }
 526 }
 527
 528 function selectionToggleMarked(cdm_mode) {
 529         try {
 530                 if (!xmlhttp_ready(xmlhttp_rpc)) {
 531                         printLockingError();
 532                         return;
 533                 }
 534
 535                 var rows;
 536
 537                 if (cdm_mode) {
 538                         rows = cdmGetSelectedArticles();
 539                 } else {
 540                         rows = getSelectedTableRowIds("headlinesList", "RROW", "RCHK");
 541                 }
 542
 543                 if (rows.length == 0) {
 544                         alert(__("No articles are selected."));
 545                         return;
 546                 }
 547
 548                 for (i = 0; i < rows.length; i++) {
 549                         var row = document.getElementById("RROW-" + rows[i]);
 550                         var mark_img = document.getElementById("FMARKPIC-" + rows[i]);
 551
 552                         if (row && mark_img) {
 553
 554                                 if (mark_img.alt == "Set mark") {
 555                                         mark_img.src = "images/mark_set.png";
 556                                         mark_img.alt = "Reset mark";
 557                                         mark_img.setAttribute('onclick',
 558                                                 'javascript:toggleMark('+rows[i]+', false)');
 559
 560                                 } else {
 561                                         mark_img.src = "images/mark_unset.png";
 562                                         mark_img.alt = "Set mark";
 563                                         mark_img.setAttribute('onclick',
 564                                                 'javascript:toggleMark('+rows[i]+', true)');
 565                                 }
 566                         }
 567                 }
 568
 569                 if (rows.length > 0) {
 570
 571                         var query = "backend.php?op=rpc&subop=markSelected&ids=" +
 572                                 param_escape(rows.toString()) + "&cmode=2";
 573
 574                         xmlhttp_rpc.open("GET", query, true);
 575                         xmlhttp_rpc.onreadystatechange=all_counters_callback;
 576                         xmlhttp_rpc.send(null);
 577
 578                 }
 579
 580         } catch (e) {
 581                 exception_error("selectionToggleMarked", e);
 582         }
 583 }
 584
 585 function cdmGetSelectedArticles() {
 586         var sel_articles = new Array();
 587         var container = document.getElementById("headlinesInnerContainer");
 588
 589         for (i = 0; i < container.childNodes.length; i++) {
 590                 var child = container.childNodes[i];
 591
 592                 if (child.id.match("RROW-") && child.className.match("Selected")) {
 593                         var c_id = child.id.replace("RROW-", "");
 594                         sel_articles.push(c_id);
 595                 }
 596         }
 597
 598         return sel_articles;
 599 }
 600
 601 // mode = all,none,unread
 602 function cdmSelectArticles(mode) {
 603         var container = document.getElementById("headlinesInnerContainer");
 604
 605         for (i = 0; i < container.childNodes.length; i++) {
 606                 var child = container.childNodes[i];
 607
 608                 if (child.id.match("RROW-")) {
 609                         var aid = child.id.replace("RROW-", "");
 610
 611                         var cb = document.getElementById("RCHK-" + aid);
 612
 613                         if (mode == "all") {
 614                                 if (!child.className.match("Selected")) {
 615                                         child.className = child.className + "Selected";
 616                                         cb.checked = true;
 617                                 }
 618                         } else if (mode == "unread") {
 619                                 if (child.className.match("Unread") && !child.className.match("Selected")) {
 620                                         child.className = child.className + "Selected";
 621                                         cb.checked = true;
 622                                 }
 623                         } else {
 624                                 child.className = child.className.replace("Selected", "");
 625                                 cb.checked = false;
 626                         }
 627                 }
 628         }
 629 }
 630
 631 function catchupPage() {
 632
 633         if (document.getElementById("headlinesList")) {
 634                 selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', true, 'Unread', true);
 635                 selectionToggleUnread(false, false, 'viewCurrentFeed()', true);
 636                 selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', false);
 637         } else {
 638                 cdmSelectArticles('all');
 639                 selectionToggleUnread(true, false, 'viewCurrentFeed()', true)
 640                 cdmSelectArticles('none');
 641         }
 642 }
 643
 644 function labelFromSearch(search, search_mode, match_on, feed_id, is_cat) {
 645
 646         if (!xmlhttp_ready(xmlhttp_rpc)) {
 647                 printLockingError();
 648         }
 649
 650         var title = prompt("Please enter label title:", "");
 651
 652         if (title) {
 653
 654                 var query = "backend.php?op=labelFromSearch&search=" + param_escape(search) +
 655                         "&smode=" + param_escape(search_mode) + "&match=" + param_escape(match_on) +
 656                         "&feed=" + param_escape(feed_id) + "&is_cat=" + param_escape(is_cat) +
 657                         "&title=" + param_escape(title);
 658
 659                 debug("LFS: " + query);
 660
 661                 xmlhttp_rpc.open("GET", query, true);
 662                 xmlhttp_rpc.onreadystatechange=dlg_frefresh_callback;
 663                 xmlhttp_rpc.send(null);
 664         }
 665
 666 }
 667
 668 function editArticleTags(id, feed_id, cdm_enabled) {
 669         _tag_active_post_id = id;
 670         _tag_active_feed_id = feed_id;
 671         _tag_active_cdm = cdm_enabled;
 672
 673         cache_invalidate(id);
 674
 675         try {
 676                 _tag_cdm_scroll = document.getElementById("headlinesInnerContainer").scrollTop;
 677         } catch (e) { }
 678         displayDlg('editArticleTags', id);
 679 }
 680
 681
 682 function tag_saved_callback() {
 683         if (xmlhttp_rpc.readyState == 4) {
 684                 try {
 685                         debug("in tag_saved_callback");
 686
 687                         closeInfoBox();
 688                         notify("");
 689
 690                         if (tagsAreDisplayed()) {
 691                                 _reload_feedlist_after_view = true;
 692                         }
 693
 694                         if (!_tag_active_cdm) {
 695                                 if (active_post_id == _tag_active_post_id) {
 696                                         debug("reloading current article");
 697                                         view(_tag_active_post_id, _tag_active_feed_id);
 698                                 }
 699                         } else {
 700                                 debug("reloading current feed");
 701                                 viewCurrentFeed();
 702                         }
 703
 704                 } catch (e) {
 705                         exception_error("catchup_callback", e);
 706                 }
 707         }
 708 }
 709
 710 function editTagsSave() {
 711
 712         if (!xmlhttp_ready(xmlhttp_rpc)) {
 713                 printLockingError();
 714         }
 715
 716         notify_progress("Saving article tags...");
 717
 718         var form = document.forms["tag_edit_form"];
 719
 720         var query = Form.serialize("tag_edit_form");
 721
 722         xmlhttp_rpc.open("GET", "backend.php?op=rpc&subop=setArticleTags&" + query, true);
 723         xmlhttp_rpc.onreadystatechange=tag_saved_callback;
 724         xmlhttp_rpc.send(null);
 725
 726 }
 727
 728 function editTagsInsert() {
 729         try {
 730
 731                 var form = document.forms["tag_edit_form"];
 732
 733                 var found_tags = form.found_tags;
 734                 var tags_str = form.tags_str;
 735
 736                 var tag = found_tags[found_tags.selectedIndex].value;
 737
 738                 if (tags_str.value.length > 0 &&
 739                                 tags_str.value.lastIndexOf(", ") != tags_str.value.length - 2) {
 740
 741                         tags_str.value = tags_str.value + ", ";
 742                 }
 743
 744                 tags_str.value = tags_str.value + tag + ", ";
 745
 746                 found_tags.selectedIndex = 0;
 747
 748         } catch (e) {
 749                 exception_error(e, "editTagsInsert");
 750         }
 751 }
 752
 753 function cdmWatchdog() {
 754
 755         try {
 756
 757                 var ctr = document.getElementById("headlinesInnerContainer");
 758
 759                 if (!ctr) return;
 760
 761                 var ids = new Array();
 762
 763                 var e = ctr.firstChild;
 764
 765                 while (e) {
 766                         if (e.className && e.className == "cdmArticleUnread" && e.id &&
 767                                         e.id.match("RROW-")) {
 768
 769                                 // article fits in viewport OR article is longer than viewport and
 770                                 // its bottom is visible
 771
 772                                 if (ctr.scrollTop <= e.offsetTop && e.offsetTop + e.offsetHeight <=
 773                                                 ctr.scrollTop + ctr.offsetHeight) {
 774
 775 //                                      debug(e.id + " is visible " + e.offsetTop + "." +
 776 //                                              (e.offsetTop + e.offsetHeight) + " vs " + ctr.scrollTop + "." +
 777 //                                              (ctr.scrollTop + ctr.offsetHeight));
 778
 779                                         ids.push(e.id.replace("RROW-", ""));
 780
 781                                 } else if (e.offsetHeight > ctr.offsetHeight &&
 782                                                 e.offsetTop + e.offsetHeight >= ctr.scrollTop &&
 783                                                 e.offsetTop + e.offsetHeight <= ctr.scrollTop + ctr.offsetHeight) {
 784
 785                                         ids.push(e.id.replace("RROW-", ""));
 786
 787                                 }
 788
 789                                 // method 2: article bottom is visible and is in upper 1/2 of the viewport
 790
 791 /*                              if (e.offsetTop + e.offsetHeight >= ctr.scrollTop &&
 792                                                 e.offsetTop + e.offsetHeight <= ctr.scrollTop + ctr.offsetHeight/2) {
 793
 794                                         ids.push(e.id.replace("RROW-", ""));
 795
 796                                 } */
 797
 798                         }
 799
 800                         e = e.nextSibling;
 801                 }
 802
 803                 debug("cdmWatchdog, ids= " + ids.toString());
 804
 805                 if (ids.length > 0 && xmlhttp_ready(xmlhttp_rpc)) {
 806
 807                         for (var i = 0; i < ids.length; i++) {
 808                                 var e = document.getElementById("RROW-" + ids[i]);
 809                                 if (e) {
 810                                         e.className = e.className.replace("Unread", "");
 811                                 }
 812                         }
 813
 814                         var query = "backend.php?op=rpc&subop=catchupSelected&ids=" +
 815                                 param_escape(ids.toString()) + "&cmode=0";
 816
 817                         xmlhttp_rpc.open("GET", query, true);
 818                         xmlhttp_rpc.onreadystatechange=all_counters_callback;
 819                         xmlhttp_rpc.send(null);
 820
 821                 }
 822
 823                 _cdm_wd_timeout = window.setTimeout("cdmWatchdog()", 4000);
 824
 825         } catch (e) {
 826                 exception_error(e, "cdmWatchdog");
 827         }
 828
 829 }
 830
 831
 832 function cache_inject(id, article) {
 833         if (!cache_check(id)) {
 834                 debug("cache_article: miss: " + id);
 835
 836                 var cache_obj = new Array();
 837
 838                 cache_obj["id"] = id;
 839                 cache_obj["data"] = article;
 840
 841                 article_cache.push(cache_obj);
 842
 843         } else {
 844                 debug("cache_article: hit: " + id);
 845         }
 846 }
 847
 848 function cache_find(id) {
 849         for (var i = 0; i < article_cache.length; i++) {
 850                 if (article_cache[i]["id"] == id) {
 851                         return article_cache[i]["data"];
 852                 }
 853         }
 854         return false;
 855 }
 856
 857 function cache_check(id) {
 858         for (var i = 0; i < article_cache.length; i++) {
 859                 if (article_cache[i]["id"] == id) {
 860                         return true;
 861                 }
 862         }
 863         return false;
 864 }
 865
 866 function cache_expire() {
 867         while (article_cache.length > 20) {
 868                 article_cache.shift();
 869         }
 870 }
 871
 872 function cache_invalidate(id) {
 873         var i = 0
 874
 875         while (i < article_cache.length) {
 876                 if (article_cache[i]["id"] == id) {
 877                         article_cache.remove(i);
 878                         return true;
 879                 }
 880                 i++;
 881         }
 882         return false;
 883 }