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                         var runtime_info = xmlhttp.responseXML.getElementsByTagName("runtime-info");
  49
  50                         if (headlines) {
  51                                 f.innerHTML = headlines.firstChild.nodeValue;
  52                         } else {
  53                                 debug("headlines_callback: returned no data");
  54                         f.innerHTML = "<div class='whiteBox'>" + __('Could not update headlines (missing XML data)') + "</div>";
  55
  56                         }
  57
  58                         if (articles) {
  59                                 for (var i = 0; i < articles.length; i++) {
  60                                         var a_id = articles[i].getAttribute("id");
  61                                         debug("found id: " + a_id);
  62                                         cache_inject(a_id, articles[i].firstChild.nodeValue);
  63                                 }
  64                         } else {
  65                                 debug("no cached articles received");
  66                         }
  67
  68                         if (counters) {
  69                                 debug("parsing piggybacked counters: " + counters);
  70                                 parse_counters(counters, false);
  71                         } else {
  72                                 debug("counters container not found in reply");
  73                         }
  74
  75                         if (runtime_info) {
  76                                 debug("parsing runtime info: " + runtime_info[0]);
  77                                 parse_runtime_info(runtime_info[0]);
  78                         } else {
  79                                 debug("counters container not found in reply");
  80                         }
  81
  82                 } else {
  83                         debug("headlines_callback: returned no XML object");
  84                         f.innerHTML = "<div class='whiteBox'>" + __('Could not update headlines (missing XML object)') + "</div>";
  85                 }
  86
  87                 if (typeof correctPNG != 'undefined') {
  88                         correctPNG();
  89                 }
  90
  91                 if (_cdm_wd_timeout) window.clearTimeout(_cdm_wd_timeout);
  92
  93                 if (!document.getElementById("headlinesList") &&
  94                                 getInitParam("cdm_auto_catchup") == 1) {
  95                         debug("starting CDM watchdog");
  96                         _cdm_wd_timeout = window.setTimeout("cdmWatchdog()", 5000);
  97                         _cdm_wd_vishist = new Array();
  98                 } else {
  99                         debug("not in CDM mode or watchdog disabled");
 100                 }
 101
 102                 if (_tag_cdm_scroll) {
 103                         try {
 104                                 document.getElementById("headlinesInnerContainer").scrollTop = _tag_cdm_scroll;
 105                                 _tag_cdm_scroll = false;
 106                         } catch (e) { }
 107                 }
 108
 109                 notify("");
 110         }
 111 }
 112
 113 function render_article(article) {
 114         try {
 115                 var f = document.getElementById("content-frame");
 116                 try {
 117                         f.scrollTop = 0;
 118                 } catch (e) { };
 119
 120                 f.innerHTML = article;
 121
 122         } catch (e) {
 123                 exception_error("render_article", e);
 124         }
 125 }
 126
 127 function article_callback() {
 128         if (xmlhttp.readyState == 4) {
 129                 debug("article_callback");
 130
 131                 try {
 132                         if (xmlhttp.responseXML) {
 133                                 var reply = xmlhttp.responseXML.firstChild.firstChild;
 134
 135                                 var articles = xmlhttp.responseXML.getElementsByTagName("article");
 136
 137                                 for (var i = 0; i < articles.length; i++) {
 138                                         var a_id = articles[i].getAttribute("id");
 139
 140                                         debug("found id: " + a_id);
 141
 142                                         if (a_id == active_post_id) {
 143                                                 debug("active article, rendering...");
 144                                                 render_article(articles[i].firstChild.nodeValue);
 145                                         }
 146
 147                                         cache_inject(a_id, articles[i].firstChild.nodeValue);
 148                                 }
 149
 150                         } else {
 151                                 debug("article_callback: returned no XML object");
 152                                 var f = document.getElementById("content-frame");
 153                                 f.innerHTML = "<div class='whiteBox'>" + __('Could not display article (missing XML object)') + "</div>";
 154                         }
 155                 } catch (e) {
 156                         exception_error("article_callback", e);
 157                 }
 158
 159                 var date = new Date();
 160                 last_article_view = date.getTime() / 1000;
 161
 162                 if (typeof correctPNG != 'undefined') {
 163                         correctPNG();
 164                 }
 165
 166                 if (_reload_feedlist_after_view) {
 167                         setTimeout('updateFeedList(false, false)', 50);
 168                         _reload_feedlist_after_view = false;
 169                 } else {
 170                         var counters = xmlhttp.responseXML.getElementsByTagName("counters")[0];
 171
 172                         if (counters) {
 173                                 debug("parsing piggybacked counters: " + counters);
 174                                 parse_counters(counters, false);
 175                         } else {
 176                                 debug("counters container not found in reply");
 177                         }
 178                 }
 179
 180                 notify("");
 181         }
 182 }
 183
 184 function view(id, feed_id, skip_history) {
 185
 186         try {
 187                 debug("loading article: " + id + "/" + feed_id);
 188
 189                 active_real_feed_id = feed_id;
 190
 191                 var cached_article = cache_find(id);
 192
 193                 debug("cache check result: " + (cached_article != false));
 194
 195 /*              if (!skip_history) {
 196                         history_push("ARTICLE:" + id + ":" + feed_id);
 197                 } */
 198
 199                 enableHotkeys();
 200
 201                 //setActiveFeedId(feed_id);
 202
 203                 var query = "backend.php?op=view&id=" + param_escape(id) +
 204                         "&feed=" + param_escape(feed_id);
 205
 206                 var date = new Date();
 207
 208                 if (!xmlhttp_ready(xmlhttp) && last_article_view < date.getTime() / 1000 - 15) {
 209                         debug("<b>xmlhttp seems to be stuck at view, aborting</b>");
 210                         xmlhttp.abort();
 211                         if (is_safari()) {
 212                                 debug("trying alternative reset method for Safari");
 213                                 xmlhttp = Ajax.getTransport();
 214                         }
 215                 }
 216
 217                 if (xmlhttp_ready(xmlhttp)) {
 218
 219                         active_post_id = id;
 220
 221                         cleanSelected("headlinesList");
 222
 223                         var crow = document.getElementById("RROW-" + active_post_id);
 224
 225                         var article_is_unread = crow.className.match("Unread");
 226                         debug("article is unread: " + article_is_unread);
 227
 228                         crow.className = crow.className.replace("Unread", "");
 229
 230                         var upd_img_pic = document.getElementById("FUPDPIC-" + active_post_id);
 231
 232                         if (upd_img_pic) {
 233                                 upd_img_pic.src = "images/blank_icon.gif";
 234                         }
 235
 236                         selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', false);
 237                         markHeadline(active_post_id);
 238
 239                         var neighbor_ids = getRelativePostIds(active_post_id);
 240
 241                         /* only request uncached articles */
 242
 243                         var cids_to_request = Array();
 244
 245                         for (var i = 0; i < neighbor_ids.length; i++) {
 246                                 if (!cache_check(neighbor_ids[i])) {
 247                                         cids_to_request.push(neighbor_ids[i]);
 248                                 }
 249                         }
 250
 251                         debug("additional ids: " + cids_to_request.toString());
 252
 253                         /* additional info for piggyback counters */
 254
 255                         if (tagsAreDisplayed()) {
 256                                 query = query + "&omode=lt";
 257                         } else {
 258                                 query = query + "&omode=flc";
 259                         }
 260
 261                         var date = new Date();
 262                         var timestamp = Math.round(date.getTime() / 1000);
 263                         query = query + "&ts=" + timestamp;
 264
 265                         query = query + "&cids=" + cids_to_request.toString();
 266
 267                         if (!cached_article) {
 268
 269                                 notify_progress("Loading, please wait...");
 270
 271                                 debug(query);
 272
 273                                 xmlhttp.open("GET", query, true);
 274                                 xmlhttp.onreadystatechange=article_callback;
 275                                 xmlhttp.send(null);
 276                         } else if (cached_article && article_is_unread) {
 277
 278                                 query = query + "&mode=prefetch";
 279
 280                                 debug(query);
 281
 282                                 xmlhttp.open("GET", query, true);
 283                                 xmlhttp.onreadystatechange=article_callback;
 284                                 xmlhttp.send(null);
 285
 286                                 render_article(cached_article);
 287
 288                         } else if (cached_article) {
 289
 290                                 query = query + "&mode=prefetch_old";
 291
 292                                 debug(query);
 293
 294                                 xmlhttp.open("GET", query, true);
 295                                 xmlhttp.onreadystatechange=article_callback;
 296                                 xmlhttp.send(null);
 297
 298                                 render_article(cached_article);
 299
 300                         }
 301
 302                         cache_expire();
 303
 304                 } else {
 305                         debug("xmlhttp busy (@view)");
 306                         printLockingError();
 307                 }
 308
 309         } catch (e) {
 310                 exception_error("view", e);
 311         }
 312 }
 313
 314 function tMark(id) {
 315         return toggleMark(id);
 316 }
 317
 318 function toggleMark(id) {
 319
 320         if (!xmlhttp_ready(xmlhttp_rpc)) {
 321                 printLockingError();
 322                 return;
 323         }
 324
 325         var query = "backend.php?op=rpc&id=" + id + "&subop=mark";
 326
 327         var mark_img = document.getElementById("FMPIC-" + id);
 328         var vfeedu = document.getElementById("FEEDU--1");
 329         var crow = document.getElementById("RROW-" + id);
 330
 331         if (mark_img.alt != "Reset mark") {
 332                 mark_img.src = "images/mark_set.png";
 333                 mark_img.alt = "Reset mark";
 334                 query = query + "&mark=1";
 335
 336                 if (vfeedu && crow.className.match("Unread")) {
 337                         vfeedu.innerHTML = (+vfeedu.innerHTML) + 1;
 338                 }
 339
 340         } else {
 341                 mark_img.src = "images/mark_unset.png";
 342                 mark_img.alt = "Set mark";
 343                 query = query + "&mark=0";
 344
 345                 if (vfeedu && crow.className.match("Unread")) {
 346                         vfeedu.innerHTML = (+vfeedu.innerHTML) - 1;
 347                 }
 348
 349         }
 350
 351         var vfeedctr = document.getElementById("FEEDCTR--1");
 352         var vfeedr = document.getElementById("FEEDR--1");
 353
 354         if (vfeedu && vfeedctr) {
 355                 if ((+vfeedu.innerHTML) > 0) {
 356                         if (crow.className.match("Unread") && !vfeedr.className.match("Unread")) {
 357                                 vfeedr.className = vfeedr.className + "Unread";
 358                                 vfeedctr.className = "odd";
 359                         }
 360                 } else {
 361                         vfeedctr.className = "invisible";
 362                         vfeedr.className = vfeedr.className.replace("Unread", "");
 363                 }
 364         }
 365
 366         debug("toggle starred for aid " + id);
 367
 368         new Ajax.Request(query);
 369
 370 }
 371
 372 function correctHeadlinesOffset(id) {
 373
 374         try {
 375
 376                 var hlist = document.getElementById("headlinesList");
 377                 var container = document.getElementById("headlinesInnerContainer");
 378                 var row = document.getElementById("RROW-" + id);
 379
 380                 var viewport = container.offsetHeight;
 381
 382                 var rel_offset_top = row.offsetTop - container.scrollTop;
 383                 var rel_offset_bottom = row.offsetTop + row.offsetHeight - container.scrollTop;
 384
 385                 debug("Rtop: " + rel_offset_top + " Rbtm: " + rel_offset_bottom);
 386                 debug("Vport: " + viewport);
 387
 388                 if (rel_offset_top <= 0 || rel_offset_top > viewport) {
 389                         container.scrollTop = row.offsetTop;
 390                 } else if (rel_offset_bottom > viewport) {
 391
 392                         /* doesn't properly work with Opera in some cases because
 393                                 Opera fucks up element scrolling */
 394
 395                         container.scrollTop = row.offsetTop + row.offsetHeight - viewport;
 396                 }
 397
 398         } catch (e) {
 399                 exception_error("correctHeadlinesOffset", e);
 400         }
 401
 402 }
 403
 404 function moveToPost(mode) {
 405
 406         // check for combined mode
 407         if (!document.getElementById("headlinesList"))
 408                 return;
 409
 410         var rows = getVisibleHeadlineIds();
 411
 412         var prev_id = false;
 413         var next_id = false;
 414
 415         if (!document.getElementById('RROW-' + active_post_id)) {
 416                 active_post_id = false;
 417         }
 418
 419         if (active_post_id == false) {
 420                 next_id = getFirstVisibleHeadlineId();
 421                 prev_id = getLastVisibleHeadlineId();
 422         } else {
 423                 for (var i = 0; i < rows.length; i++) {
 424                         if (rows[i] == active_post_id) {
 425                                 prev_id = rows[i-1];
 426                                 next_id = rows[i+1];
 427                         }
 428                 }
 429         }
 430
 431         if (mode == "next") {
 432                 if (next_id) {
 433                         correctHeadlinesOffset(next_id);
 434                         view(next_id, getActiveFeedId());
 435                 }
 436         }
 437
 438         if (mode == "prev") {
 439                 if (prev_id) {
 440                         correctHeadlinesOffset(prev_id);
 441                         view(prev_id, getActiveFeedId());
 442                 }
 443         }
 444 }
 445
 446 function toggleUnread(id, cmode) {
 447         try {
 448                 if (!xmlhttp_ready(xmlhttp_rpc)) {
 449                         printLockingError();
 450                         return;
 451                 }
 452
 453                 var row = document.getElementById("RROW-" + id);
 454                 if (row) {
 455                         var nc = row.className;
 456                         nc = nc.replace("Unread", "");
 457                         nc = nc.replace("Selected", "");
 458
 459                         if (row.className.match("Unread")) {
 460                                 row.className = nc;
 461                         } else {
 462                                 row.className = nc + "Unread";
 463                         }
 464
 465                         if (!cmode) cmode = 2;
 466
 467                         var query = "backend.php?op=rpc&subop=catchupSelected&ids=" +
 468                                 param_escape(id) + "&cmode=" + param_escape(cmode);
 469
 470                         notify_progress("Loading, please wait...");
 471
 472                         xmlhttp_rpc.open("GET", query, true);
 473                         xmlhttp_rpc.onreadystatechange=all_counters_callback;
 474                         xmlhttp_rpc.send(null);
 475
 476                 }
 477
 478
 479         } catch (e) {
 480                 exception_error("toggleUnread", e);
 481         }
 482 }
 483
 484 function selectionToggleUnread(cdm_mode, set_state, callback_func, no_error) {
 485         try {
 486                 if (!xmlhttp_ready(xmlhttp_rpc)) {
 487                         printLockingError();
 488                         return;
 489                 }
 490
 491                 var rows;
 492
 493                 if (cdm_mode) {
 494                         rows = cdmGetSelectedArticles();
 495                 } else {
 496                         rows = getSelectedTableRowIds("headlinesList", "RROW", "RCHK");
 497                 }
 498
 499                 if (rows.length == 0 && !no_error) {
 500                         alert(__("No articles are selected."));
 501                         return;
 502                 }
 503
 504                 for (i = 0; i < rows.length; i++) {
 505                         var row = document.getElementById("RROW-" + rows[i]);
 506                         if (row) {
 507                                 var nc = row.className;
 508                                 nc = nc.replace("Unread", "");
 509                                 nc = nc.replace("Selected", "");
 510
 511                                 if (row.className.match("Unread")) {
 512                                         row.className = nc + "Selected";
 513                                 } else {
 514                                         row.className = nc + "UnreadSelected";
 515                                 }
 516                         }
 517                 }
 518
 519                 if (rows.length > 0) {
 520
 521                         var cmode = "";
 522
 523                         if (set_state == undefined) {
 524                                 cmode = "2";
 525                         } else if (set_state == true) {
 526                                 cmode = "1";
 527                         } else if (set_state == false) {
 528                                 cmode = "0";
 529                         }
 530
 531                         var query = "backend.php?op=rpc&subop=catchupSelected&ids=" +
 532                                 param_escape(rows.toString()) + "&cmode=" + cmode;
 533
 534                         _catchup_callback_func = callback_func;
 535
 536                         notify_progress("Loading, please wait...");
 537
 538                         xmlhttp_rpc.open("GET", query, true);
 539                         xmlhttp_rpc.onreadystatechange=catchup_callback;
 540                         xmlhttp_rpc.send(null);
 541
 542                 }
 543
 544         } catch (e) {
 545                 exception_error("selectionToggleUnread", e);
 546         }
 547 }
 548
 549 function selectionToggleMarked(cdm_mode) {
 550         try {
 551                 if (!xmlhttp_ready(xmlhttp_rpc)) {
 552                         printLockingError();
 553                         return;
 554                 }
 555
 556                 var rows;
 557
 558                 if (cdm_mode) {
 559                         rows = cdmGetSelectedArticles();
 560                 } else {
 561                         rows = getSelectedTableRowIds("headlinesList", "RROW", "RCHK");
 562                 }
 563
 564                 if (rows.length == 0) {
 565                         alert(__("No articles are selected."));
 566                         return;
 567                 }
 568
 569                 for (i = 0; i < rows.length; i++) {
 570                         var row = document.getElementById("RROW-" + rows[i]);
 571                         var mark_img = document.getElementById("FMARKPIC-" + rows[i]);
 572
 573                         if (row && mark_img) {
 574
 575                                 if (mark_img.alt == "Set mark") {
 576                                         mark_img.src = "images/mark_set.png";
 577                                         mark_img.alt = "Reset mark";
 578                                         mark_img.setAttribute('onclick',
 579                                                 'javascript:toggleMark('+rows[i]+', false)');
 580
 581                                 } else {
 582                                         mark_img.src = "images/mark_unset.png";
 583                                         mark_img.alt = "Set mark";
 584                                         mark_img.setAttribute('onclick',
 585                                                 'javascript:toggleMark('+rows[i]+', true)');
 586                                 }
 587                         }
 588                 }
 589
 590                 if (rows.length > 0) {
 591
 592                         var query = "backend.php?op=rpc&subop=markSelected&ids=" +
 593                                 param_escape(rows.toString()) + "&cmode=2";
 594
 595                         xmlhttp_rpc.open("GET", query, true);
 596                         xmlhttp_rpc.onreadystatechange=all_counters_callback;
 597                         xmlhttp_rpc.send(null);
 598
 599                 }
 600
 601         } catch (e) {
 602                 exception_error("selectionToggleMarked", e);
 603         }
 604 }
 605
 606 function cdmGetSelectedArticles() {
 607         var sel_articles = new Array();
 608         var container = document.getElementById("headlinesInnerContainer");
 609
 610         for (i = 0; i < container.childNodes.length; i++) {
 611                 var child = container.childNodes[i];
 612
 613                 if (child.id.match("RROW-") && child.className.match("Selected")) {
 614                         var c_id = child.id.replace("RROW-", "");
 615                         sel_articles.push(c_id);
 616                 }
 617         }
 618
 619         return sel_articles;
 620 }
 621
 622 // mode = all,none,unread
 623 function cdmSelectArticles(mode) {
 624         var container = document.getElementById("headlinesInnerContainer");
 625
 626         for (i = 0; i < container.childNodes.length; i++) {
 627                 var child = container.childNodes[i];
 628
 629                 if (child.id.match("RROW-")) {
 630                         var aid = child.id.replace("RROW-", "");
 631
 632                         var cb = document.getElementById("RCHK-" + aid);
 633
 634                         if (mode == "all") {
 635                                 if (!child.className.match("Selected")) {
 636                                         child.className = child.className + "Selected";
 637                                         cb.checked = true;
 638                                 }
 639                         } else if (mode == "unread") {
 640                                 if (child.className.match("Unread") && !child.className.match("Selected")) {
 641                                         child.className = child.className + "Selected";
 642                                         cb.checked = true;
 643                                 }
 644                         } else {
 645                                 child.className = child.className.replace("Selected", "");
 646                                 cb.checked = false;
 647                         }
 648                 }
 649         }
 650 }
 651
 652 function catchupPage() {
 653
 654         if (document.getElementById("headlinesList")) {
 655                 selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', true, 'Unread', true);
 656                 selectionToggleUnread(false, false, 'viewCurrentFeed()', true);
 657                 selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', false);
 658         } else {
 659                 cdmSelectArticles('all');
 660                 selectionToggleUnread(true, false, 'viewCurrentFeed()', true)
 661                 cdmSelectArticles('none');
 662         }
 663 }
 664
 665 function labelFromSearch(search, search_mode, match_on, feed_id, is_cat) {
 666
 667         if (!xmlhttp_ready(xmlhttp_rpc)) {
 668                 printLockingError();
 669         }
 670
 671         var title = prompt("Please enter label title:", "");
 672
 673         if (title) {
 674
 675                 var query = "backend.php?op=labelFromSearch&search=" + param_escape(search) +
 676                         "&smode=" + param_escape(search_mode) + "&match=" + param_escape(match_on) +
 677                         "&feed=" + param_escape(feed_id) + "&is_cat=" + param_escape(is_cat) +
 678                         "&title=" + param_escape(title);
 679
 680                 debug("LFS: " + query);
 681
 682                 xmlhttp_rpc.open("GET", query, true);
 683                 xmlhttp_rpc.onreadystatechange=dlg_frefresh_callback;
 684                 xmlhttp_rpc.send(null);
 685         }
 686
 687 }
 688
 689 function editArticleTags(id, feed_id, cdm_enabled) {
 690         _tag_active_post_id = id;
 691         _tag_active_feed_id = feed_id;
 692         _tag_active_cdm = cdm_enabled;
 693
 694         cache_invalidate(id);
 695
 696         try {
 697                 _tag_cdm_scroll = document.getElementById("headlinesInnerContainer").scrollTop;
 698         } catch (e) { }
 699         displayDlg('editArticleTags', id);
 700 }
 701
 702
 703 function tag_saved_callback() {
 704         if (xmlhttp_rpc.readyState == 4) {
 705                 try {
 706                         debug("in tag_saved_callback");
 707
 708                         closeInfoBox();
 709                         notify("");
 710
 711                         if (tagsAreDisplayed()) {
 712                                 _reload_feedlist_after_view = true;
 713                         }
 714
 715                         if (!_tag_active_cdm) {
 716                                 if (active_post_id == _tag_active_post_id) {
 717                                         debug("reloading current article");
 718                                         view(_tag_active_post_id, _tag_active_feed_id);
 719                                 }
 720                         } else {
 721                                 debug("reloading current feed");
 722                                 viewCurrentFeed();
 723                         }
 724
 725                 } catch (e) {
 726                         exception_error("catchup_callback", e);
 727                 }
 728         }
 729 }
 730
 731 function editTagsSave() {
 732
 733         if (!xmlhttp_ready(xmlhttp_rpc)) {
 734                 printLockingError();
 735         }
 736
 737         notify_progress("Saving article tags...");
 738
 739         var form = document.forms["tag_edit_form"];
 740
 741         var query = Form.serialize("tag_edit_form");
 742
 743         query = "backend.php?op=rpc&subop=setArticleTags&" + query;
 744
 745         debug(query);
 746
 747         xmlhttp_rpc.open("GET", query, true);
 748         xmlhttp_rpc.onreadystatechange=tag_saved_callback;
 749         xmlhttp_rpc.send(null);
 750
 751 }
 752
 753 function editTagsInsert() {
 754         try {
 755
 756                 var form = document.forms["tag_edit_form"];
 757
 758                 var found_tags = form.found_tags;
 759                 var tags_str = form.tags_str;
 760
 761                 var tag = found_tags[found_tags.selectedIndex].value;
 762
 763                 if (tags_str.value.length > 0 &&
 764                                 tags_str.value.lastIndexOf(", ") != tags_str.value.length - 2) {
 765
 766                         tags_str.value = tags_str.value + ", ";
 767                 }
 768
 769                 tags_str.value = tags_str.value + tag + ", ";
 770
 771                 found_tags.selectedIndex = 0;
 772
 773         } catch (e) {
 774                 exception_error(e, "editTagsInsert");
 775         }
 776 }
 777
 778 function cdmWatchdog() {
 779
 780         try {
 781
 782                 var ctr = document.getElementById("headlinesInnerContainer");
 783
 784                 if (!ctr) return;
 785
 786                 var ids = new Array();
 787
 788                 var e = ctr.firstChild;
 789
 790                 while (e) {
 791                         if (e.className && e.className == "cdmArticleUnread" && e.id &&
 792                                         e.id.match("RROW-")) {
 793
 794                                 // article fits in viewport OR article is longer than viewport and
 795                                 // its bottom is visible
 796
 797                                 if (ctr.scrollTop <= e.offsetTop && e.offsetTop + e.offsetHeight <=
 798                                                 ctr.scrollTop + ctr.offsetHeight) {
 799
 800 //                                      debug(e.id + " is visible " + e.offsetTop + "." +
 801 //                                              (e.offsetTop + e.offsetHeight) + " vs " + ctr.scrollTop + "." +
 802 //                                              (ctr.scrollTop + ctr.offsetHeight));
 803
 804                                         ids.push(e.id.replace("RROW-", ""));
 805
 806                                 } else if (e.offsetHeight > ctr.offsetHeight &&
 807                                                 e.offsetTop + e.offsetHeight >= ctr.scrollTop &&
 808                                                 e.offsetTop + e.offsetHeight <= ctr.scrollTop + ctr.offsetHeight) {
 809
 810                                         ids.push(e.id.replace("RROW-", ""));
 811
 812                                 }
 813
 814                                 // method 2: article bottom is visible and is in upper 1/2 of the viewport
 815
 816 /*                              if (e.offsetTop + e.offsetHeight >= ctr.scrollTop &&
 817                                                 e.offsetTop + e.offsetHeight <= ctr.scrollTop + ctr.offsetHeight/2) {
 818
 819                                         ids.push(e.id.replace("RROW-", ""));
 820
 821                                 } */
 822
 823                         }
 824
 825                         e = e.nextSibling;
 826                 }
 827
 828                 debug("cdmWatchdog, ids= " + ids.toString());
 829
 830                 if (ids.length > 0 && xmlhttp_ready(xmlhttp_rpc)) {
 831
 832                         for (var i = 0; i < ids.length; i++) {
 833                                 var e = document.getElementById("RROW-" + ids[i]);
 834                                 if (e) {
 835                                         e.className = e.className.replace("Unread", "");
 836                                 }
 837                         }
 838
 839                         var query = "backend.php?op=rpc&subop=catchupSelected&ids=" +
 840                                 param_escape(ids.toString()) + "&cmode=0";
 841
 842                         xmlhttp_rpc.open("GET", query, true);
 843                         xmlhttp_rpc.onreadystatechange=all_counters_callback;
 844                         xmlhttp_rpc.send(null);
 845
 846                 }
 847
 848                 _cdm_wd_timeout = window.setTimeout("cdmWatchdog()", 4000);
 849
 850         } catch (e) {
 851                 exception_error(e, "cdmWatchdog");
 852         }
 853
 854 }
 855
 856
 857 function cache_inject(id, article) {
 858         if (!cache_check(id)) {
 859                 debug("cache_article: miss: " + id);
 860
 861                 var cache_obj = new Array();
 862
 863                 cache_obj["id"] = id;
 864                 cache_obj["data"] = article;
 865
 866                 article_cache.push(cache_obj);
 867
 868         } else {
 869                 debug("cache_article: hit: " + id);
 870         }
 871 }
 872
 873 function cache_find(id) {
 874         for (var i = 0; i < article_cache.length; i++) {
 875                 if (article_cache[i]["id"] == id) {
 876                         return article_cache[i]["data"];
 877                 }
 878         }
 879         return false;
 880 }
 881
 882 function cache_check(id) {
 883         for (var i = 0; i < article_cache.length; i++) {
 884                 if (article_cache[i]["id"] == id) {
 885                         return true;
 886                 }
 887         }
 888         return false;
 889 }
 890
 891 function cache_expire() {
 892         while (article_cache.length > 20) {
 893                 article_cache.shift();
 894         }
 895 }
 896
 897 function cache_invalidate(id) {
 898         var i = 0
 899
 900         try {
 901
 902                 while (i < article_cache.length) {
 903                         if (article_cache[i]["id"] == id) {
 904                                 debug("cache_invalidate: removed id " + id);
 905                                 article_cache.splice(i, 1);
 906                                 return true;
 907                         }
 908                         i++;
 909                 }
 910                 debug("cache_invalidate: id not found: " + id);
 911                 return false;
 912         } catch (e) {
 913                 exception_error("cache_invalidate", e);
 914         }
 915 }