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tt-rss/viewfeed.js

906 lines
20 KiB
JavaScript

var active_post_id = false;
var _catchup_callback_func = false;
var last_article_view = false;
var active_real_feed_id = false;
var _tag_active_post_id = false;
var _tag_active_feed_id = false;
var _tag_active_cdm = false;
// FIXME: kludge, to restore scrollTop after tag editor terminates
var _tag_cdm_scroll = false;
// FIXME: kludges, needs proper implementation
var _reload_feedlist_after_view = false;
var _cdm_wd_timeout = false;
var _cdm_wd_vishist = new Array();
var article_cache = new Array();
function catchup_callback() {
if (xmlhttp_rpc.readyState == 4) {
try {
debug("catchup_callback");
if (_catchup_callback_func) {
setTimeout(_catchup_callback_func, 100);
}
notify("");
all_counters_callback();
} catch (e) {
exception_error("catchup_callback", e);
}
}
}
function headlines_callback() {
if (xmlhttp.readyState == 4) {
debug("headlines_callback");
var f = document.getElementById("headlines-frame");
try {
f.scrollTop = 0;
} catch (e) { };
if (xmlhttp.responseXML) {
var headlines = xmlhttp.responseXML.getElementsByTagName("headlines")[0];
var counters = xmlhttp.responseXML.getElementsByTagName("counters")[0];
var articles = xmlhttp.responseXML.getElementsByTagName("article");
if (headlines) {
f.innerHTML = headlines.firstChild.nodeValue;
} else {
debug("headlines_callback: returned no data");
f.innerHTML = "<div class='whiteBox'>" + __('Could not update headlines (missing XML data)') + "</div>";
}
if (articles) {
for (var i = 0; i < articles.length; i++) {
var a_id = articles[i].getAttribute("id");
debug("found id: " + a_id);
cache_inject(a_id, articles[i].firstChild.nodeValue);
}
} else {
debug("no cached articles received");
}
if (counters) {
debug("parsing piggybacked counters: " + counters);
parse_counters(counters, false);
} else {
debug("counters container not found in reply");
}
} else {
debug("headlines_callback: returned no XML object");
f.innerHTML = "<div class='whiteBox'>" + __('Could not update headlines (missing XML object)') + "</div>";
}
if (typeof correctPNG != 'undefined') {
correctPNG();
}
if (_cdm_wd_timeout) window.clearTimeout(_cdm_wd_timeout);
if (!document.getElementById("headlinesList") &&
getInitParam("cdm_auto_catchup") == 1) {
debug("starting CDM watchdog");
_cdm_wd_timeout = window.setTimeout("cdmWatchdog()", 5000);
_cdm_wd_vishist = new Array();
} else {
debug("not in CDM mode or watchdog disabled");
}
if (_tag_cdm_scroll) {
try {
document.getElementById("headlinesInnerContainer").scrollTop = _tag_cdm_scroll;
_tag_cdm_scroll = false;
} catch (e) { }
}
notify("");
}
}
function render_article(article) {
try {
var f = document.getElementById("content-frame");
try {
f.scrollTop = 0;
} catch (e) { };
f.innerHTML = article;
} catch (e) {
exception_error("render_article", e);
}
}
function article_callback() {
if (xmlhttp.readyState == 4) {
debug("article_callback");
try {
if (xmlhttp.responseXML) {
var reply = xmlhttp.responseXML.firstChild.firstChild;
var articles = xmlhttp.responseXML.getElementsByTagName("article");
for (var i = 0; i < articles.length; i++) {
var a_id = articles[i].getAttribute("id");
debug("found id: " + a_id);
if (a_id == active_post_id) {
debug("active article, rendering...");
render_article(articles[i].firstChild.nodeValue);
}
cache_inject(a_id, articles[i].firstChild.nodeValue);
}
} else {
debug("article_callback: returned no XML object");
var f = document.getElementById("content-frame");
f.innerHTML = "<div class='whiteBox'>" + __('Could not display article (missing XML object)') + "</div>";
}
} catch (e) {
exception_error("article_callback", e);
}
var date = new Date();
last_article_view = date.getTime() / 1000;
if (typeof correctPNG != 'undefined') {
correctPNG();
}
if (_reload_feedlist_after_view) {
setTimeout('updateFeedList(false, false)', 50);
_reload_feedlist_after_view = false;
} else {
var counters = xmlhttp.responseXML.getElementsByTagName("counters")[0];
if (counters) {
debug("parsing piggybacked counters: " + counters);
parse_counters(counters, false);
} else {
debug("counters container not found in reply");
}
}
notify("");
}
}
function view(id, feed_id, skip_history) {
try {
debug("loading article: " + id + "/" + feed_id);
active_real_feed_id = feed_id;
var cached_article = cache_find(id);
debug("cache check result: " + (cached_article != false));
/* if (!skip_history) {
history_push("ARTICLE:" + id + ":" + feed_id);
} */
enableHotkeys();
//setActiveFeedId(feed_id);
var query = "backend.php?op=view&id=" + param_escape(id) +
"&feed=" + param_escape(feed_id);
var date = new Date();
if (!xmlhttp_ready(xmlhttp) && last_article_view < date.getTime() / 1000 - 15) {
debug("<b>xmlhttp seems to be stuck at view, aborting</b>");
xmlhttp.abort();
if (is_safari()) {
xmlhttp_ctr = Ajax.getTransport();
}
}
if (xmlhttp_ready(xmlhttp)) {
active_post_id = id;
cleanSelected("headlinesList");
var crow = document.getElementById("RROW-" + active_post_id);
var article_is_unread = crow.className.match("Unread");
debug("article is unread: " + article_is_unread);
crow.className = crow.className.replace("Unread", "");
var upd_img_pic = document.getElementById("FUPDPIC-" + active_post_id);
if (upd_img_pic) {
upd_img_pic.src = "images/blank_icon.gif";
}
selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', false);
markHeadline(active_post_id);
var neighbor_ids = getRelativePostIds(active_post_id);
/* only request uncached articles */
var cids_to_request = Array();
for (var i = 0; i < neighbor_ids.length; i++) {
if (!cache_check(neighbor_ids[i])) {
cids_to_request.push(neighbor_ids[i]);
}
}
debug("additional ids: " + cids_to_request.toString());
/* additional info for piggyback counters */
if (tagsAreDisplayed()) {
query = query + "&omode=lt";
} else {
query = query + "&omode=flc";
}
var date = new Date();
var timestamp = Math.round(date.getTime() / 1000);
query = query + "&ts=" + timestamp;
query = query + "&cids=" + cids_to_request.toString();
if (!cached_article) {
notify_progress("Loading, please wait...");
debug(query);
xmlhttp.open("GET", query, true);
xmlhttp.onreadystatechange=article_callback;
xmlhttp.send(null);
} else if (cached_article && article_is_unread) {
query = query + "&mode=prefetch";
debug(query);
xmlhttp.open("GET", query, true);
xmlhttp.onreadystatechange=article_callback;
xmlhttp.send(null);
render_article(cached_article);
} else if (cached_article) {
query = query + "&mode=prefetch_old";
debug(query);
xmlhttp.open("GET", query, true);
xmlhttp.onreadystatechange=article_callback;
xmlhttp.send(null);
render_article(cached_article);
}
cache_expire();
} else {
debug("xmlhttp busy (@view)");
printLockingError();
}
} catch (e) {
exception_error("view", e);
}
}
function tMark(id) {
return toggleMark(id);
}
function toggleMark(id) {
if (!xmlhttp_ready(xmlhttp_rpc)) {
printLockingError();
return;
}
var query = "backend.php?op=rpc&id=" + id + "&subop=mark";
var mark_img = document.getElementById("FMPIC-" + id);
var vfeedu = document.getElementById("FEEDU--1");
var crow = document.getElementById("RROW-" + id);
if (mark_img.alt != "Reset mark") {
mark_img.src = "images/mark_set.png";
mark_img.alt = "Reset mark";
query = query + "&mark=1";
if (vfeedu && crow.className.match("Unread")) {
vfeedu.innerHTML = (+vfeedu.innerHTML) + 1;
}
} else {
mark_img.src = "images/mark_unset.png";
mark_img.alt = "Set mark";
query = query + "&mark=0";
if (vfeedu && crow.className.match("Unread")) {
vfeedu.innerHTML = (+vfeedu.innerHTML) - 1;
}
}
var vfeedctr = document.getElementById("FEEDCTR--1");
var vfeedr = document.getElementById("FEEDR--1");
if (vfeedu && vfeedctr) {
if ((+vfeedu.innerHTML) > 0) {
if (crow.className.match("Unread") && !vfeedr.className.match("Unread")) {
vfeedr.className = vfeedr.className + "Unread";
vfeedctr.className = "odd";
}
} else {
vfeedctr.className = "invisible";
vfeedr.className = vfeedr.className.replace("Unread", "");
}
}
debug("toggle starred for aid " + id);
new Ajax.Request(query);
}
function correctHeadlinesOffset(id) {
try {
var hlist = document.getElementById("headlinesList");
var container = document.getElementById("headlinesInnerContainer");
var row = document.getElementById("RROW-" + id);
var viewport = container.offsetHeight;
var rel_offset_top = row.offsetTop - container.scrollTop;
var rel_offset_bottom = row.offsetTop + row.offsetHeight - container.scrollTop;
debug("Rtop: " + rel_offset_top + " Rbtm: " + rel_offset_bottom);
debug("Vport: " + viewport);
if (rel_offset_top <= 0 || rel_offset_top > viewport) {
container.scrollTop = row.offsetTop;
} else if (rel_offset_bottom > viewport) {
/* doesn't properly work with Opera in some cases because
Opera fucks up element scrolling */
container.scrollTop = row.offsetTop + row.offsetHeight - viewport;
}
} catch (e) {
exception_error("correctHeadlinesOffset", e);
}
}
function moveToPost(mode) {
// check for combined mode
if (!document.getElementById("headlinesList"))
return;
var rows = getVisibleHeadlineIds();
var prev_id = false;
var next_id = false;
if (!document.getElementById('RROW-' + active_post_id)) {
active_post_id = false;
}
if (active_post_id == false) {
next_id = getFirstVisibleHeadlineId();
prev_id = getLastVisibleHeadlineId();
} else {
for (var i = 0; i < rows.length; i++) {
if (rows[i] == active_post_id) {
prev_id = rows[i-1];
next_id = rows[i+1];
}
}
}
if (mode == "next") {
if (next_id) {
correctHeadlinesOffset(next_id);
view(next_id, getActiveFeedId());
}
}
if (mode == "prev") {
if (prev_id) {
correctHeadlinesOffset(prev_id);
view(prev_id, getActiveFeedId());
}
}
}
function toggleUnread(id, cmode) {
try {
if (!xmlhttp_ready(xmlhttp_rpc)) {
printLockingError();
return;
}
var row = document.getElementById("RROW-" + id);
if (row) {
var nc = row.className;
nc = nc.replace("Unread", "");
nc = nc.replace("Selected", "");
if (row.className.match("Unread")) {
row.className = nc;
} else {
row.className = nc + "Unread";
}
if (!cmode) cmode = 2;
var query = "backend.php?op=rpc&subop=catchupSelected&ids=" +
param_escape(id) + "&cmode=" + param_escape(cmode);
notify_progress("Loading, please wait...");
xmlhttp_rpc.open("GET", query, true);
xmlhttp_rpc.onreadystatechange=all_counters_callback;
xmlhttp_rpc.send(null);
}
} catch (e) {
exception_error("toggleUnread", e);
}
}
function selectionToggleUnread(cdm_mode, set_state, callback_func, no_error) {
try {
if (!xmlhttp_ready(xmlhttp_rpc)) {
printLockingError();
return;
}
var rows;
if (cdm_mode) {
rows = cdmGetSelectedArticles();
} else {
rows = getSelectedTableRowIds("headlinesList", "RROW", "RCHK");
}
if (rows.length == 0 && !no_error) {
alert(__("No articles are selected."));
return;
}
for (i = 0; i < rows.length; i++) {
var row = document.getElementById("RROW-" + rows[i]);
if (row) {
var nc = row.className;
nc = nc.replace("Unread", "");
nc = nc.replace("Selected", "");
if (row.className.match("Unread")) {
row.className = nc + "Selected";
} else {
row.className = nc + "UnreadSelected";
}
}
}
if (rows.length > 0) {
var cmode = "";
if (set_state == undefined) {
cmode = "2";
} else if (set_state == true) {
cmode = "1";
} else if (set_state == false) {
cmode = "0";
}
var query = "backend.php?op=rpc&subop=catchupSelected&ids=" +
param_escape(rows.toString()) + "&cmode=" + cmode;
_catchup_callback_func = callback_func;
notify_progress("Loading, please wait...");
xmlhttp_rpc.open("GET", query, true);
xmlhttp_rpc.onreadystatechange=catchup_callback;
xmlhttp_rpc.send(null);
}
} catch (e) {
exception_error("selectionToggleUnread", e);
}
}
function selectionToggleMarked(cdm_mode) {
try {
if (!xmlhttp_ready(xmlhttp_rpc)) {
printLockingError();
return;
}
var rows;
if (cdm_mode) {
rows = cdmGetSelectedArticles();
} else {
rows = getSelectedTableRowIds("headlinesList", "RROW", "RCHK");
}
if (rows.length == 0) {
alert(__("No articles are selected."));
return;
}
for (i = 0; i < rows.length; i++) {
var row = document.getElementById("RROW-" + rows[i]);
var mark_img = document.getElementById("FMARKPIC-" + rows[i]);
if (row && mark_img) {
if (mark_img.alt == "Set mark") {
mark_img.src = "images/mark_set.png";
mark_img.alt = "Reset mark";
mark_img.setAttribute('onclick',
'javascript:toggleMark('+rows[i]+', false)');
} else {
mark_img.src = "images/mark_unset.png";
mark_img.alt = "Set mark";
mark_img.setAttribute('onclick',
'javascript:toggleMark('+rows[i]+', true)');
}
}
}
if (rows.length > 0) {
var query = "backend.php?op=rpc&subop=markSelected&ids=" +
param_escape(rows.toString()) + "&cmode=2";
xmlhttp_rpc.open("GET", query, true);
xmlhttp_rpc.onreadystatechange=all_counters_callback;
xmlhttp_rpc.send(null);
}
} catch (e) {
exception_error("selectionToggleMarked", e);
}
}
function cdmGetSelectedArticles() {
var sel_articles = new Array();
var container = document.getElementById("headlinesInnerContainer");
for (i = 0; i < container.childNodes.length; i++) {
var child = container.childNodes[i];
if (child.id.match("RROW-") && child.className.match("Selected")) {
var c_id = child.id.replace("RROW-", "");
sel_articles.push(c_id);
}
}
return sel_articles;
}
// mode = all,none,unread
function cdmSelectArticles(mode) {
var container = document.getElementById("headlinesInnerContainer");
for (i = 0; i < container.childNodes.length; i++) {
var child = container.childNodes[i];
if (child.id.match("RROW-")) {
var aid = child.id.replace("RROW-", "");
var cb = document.getElementById("RCHK-" + aid);
if (mode == "all") {
if (!child.className.match("Selected")) {
child.className = child.className + "Selected";
cb.checked = true;
}
} else if (mode == "unread") {
if (child.className.match("Unread") && !child.className.match("Selected")) {
child.className = child.className + "Selected";
cb.checked = true;
}
} else {
child.className = child.className.replace("Selected", "");
cb.checked = false;
}
}
}
}
function catchupPage() {
if (document.getElementById("headlinesList")) {
selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', true, 'Unread', true);
selectionToggleUnread(false, false, 'viewCurrentFeed()', true);
selectTableRowsByIdPrefix('headlinesList', 'RROW-', 'RCHK-', false);
} else {
cdmSelectArticles('all');
selectionToggleUnread(true, false, 'viewCurrentFeed()', true)
cdmSelectArticles('none');
}
}
function labelFromSearch(search, search_mode, match_on, feed_id, is_cat) {
if (!xmlhttp_ready(xmlhttp_rpc)) {
printLockingError();
}
var title = prompt("Please enter label title:", "");
if (title) {
var query = "backend.php?op=labelFromSearch&search=" + param_escape(search) +
"&smode=" + param_escape(search_mode) + "&match=" + param_escape(match_on) +
"&feed=" + param_escape(feed_id) + "&is_cat=" + param_escape(is_cat) +
"&title=" + param_escape(title);
debug("LFS: " + query);
xmlhttp_rpc.open("GET", query, true);
xmlhttp_rpc.onreadystatechange=dlg_frefresh_callback;
xmlhttp_rpc.send(null);
}
}
function editArticleTags(id, feed_id, cdm_enabled) {
_tag_active_post_id = id;
_tag_active_feed_id = feed_id;
_tag_active_cdm = cdm_enabled;
cache_invalidate(id);
try {
_tag_cdm_scroll = document.getElementById("headlinesInnerContainer").scrollTop;
} catch (e) { }
displayDlg('editArticleTags', id);
}
function tag_saved_callback() {
if (xmlhttp_rpc.readyState == 4) {
try {
debug("in tag_saved_callback");
closeInfoBox();
notify("");
if (tagsAreDisplayed()) {
_reload_feedlist_after_view = true;
}
if (!_tag_active_cdm) {
if (active_post_id == _tag_active_post_id) {
debug("reloading current article");
view(_tag_active_post_id, _tag_active_feed_id);
}
} else {
debug("reloading current feed");
viewCurrentFeed();
}
} catch (e) {
exception_error("catchup_callback", e);
}
}
}
function editTagsSave() {
if (!xmlhttp_ready(xmlhttp_rpc)) {
printLockingError();
}
notify_progress("Saving article tags...");
var form = document.forms["tag_edit_form"];
var query = Form.serialize("tag_edit_form");
query = "backend.php?op=rpc&subop=setArticleTags&" + query;
debug(query);
xmlhttp_rpc.open("GET", query, true);
xmlhttp_rpc.onreadystatechange=tag_saved_callback;
xmlhttp_rpc.send(null);
}
function editTagsInsert() {
try {
var form = document.forms["tag_edit_form"];
var found_tags = form.found_tags;
var tags_str = form.tags_str;
var tag = found_tags[found_tags.selectedIndex].value;
if (tags_str.value.length > 0 &&
tags_str.value.lastIndexOf(", ") != tags_str.value.length - 2) {
tags_str.value = tags_str.value + ", ";
}
tags_str.value = tags_str.value + tag + ", ";
found_tags.selectedIndex = 0;
} catch (e) {
exception_error(e, "editTagsInsert");
}
}
function cdmWatchdog() {
try {
var ctr = document.getElementById("headlinesInnerContainer");
if (!ctr) return;
var ids = new Array();
var e = ctr.firstChild;
while (e) {
if (e.className && e.className == "cdmArticleUnread" && e.id &&
e.id.match("RROW-")) {
// article fits in viewport OR article is longer than viewport and
// its bottom is visible
if (ctr.scrollTop <= e.offsetTop && e.offsetTop + e.offsetHeight <=
ctr.scrollTop + ctr.offsetHeight) {
// debug(e.id + " is visible " + e.offsetTop + "." +
// (e.offsetTop + e.offsetHeight) + " vs " + ctr.scrollTop + "." +
// (ctr.scrollTop + ctr.offsetHeight));
ids.push(e.id.replace("RROW-", ""));
} else if (e.offsetHeight > ctr.offsetHeight &&
e.offsetTop + e.offsetHeight >= ctr.scrollTop &&
e.offsetTop + e.offsetHeight <= ctr.scrollTop + ctr.offsetHeight) {
ids.push(e.id.replace("RROW-", ""));
}
// method 2: article bottom is visible and is in upper 1/2 of the viewport
/* if (e.offsetTop + e.offsetHeight >= ctr.scrollTop &&
e.offsetTop + e.offsetHeight <= ctr.scrollTop + ctr.offsetHeight/2) {
ids.push(e.id.replace("RROW-", ""));
} */
}
e = e.nextSibling;
}
debug("cdmWatchdog, ids= " + ids.toString());
if (ids.length > 0 && xmlhttp_ready(xmlhttp_rpc)) {
for (var i = 0; i < ids.length; i++) {
var e = document.getElementById("RROW-" + ids[i]);
if (e) {
e.className = e.className.replace("Unread", "");
}
}
var query = "backend.php?op=rpc&subop=catchupSelected&ids=" +
param_escape(ids.toString()) + "&cmode=0";
xmlhttp_rpc.open("GET", query, true);
xmlhttp_rpc.onreadystatechange=all_counters_callback;
xmlhttp_rpc.send(null);
}
_cdm_wd_timeout = window.setTimeout("cdmWatchdog()", 4000);
} catch (e) {
exception_error(e, "cdmWatchdog");
}
}
function cache_inject(id, article) {
if (!cache_check(id)) {
debug("cache_article: miss: " + id);
var cache_obj = new Array();
cache_obj["id"] = id;
cache_obj["data"] = article;
article_cache.push(cache_obj);
} else {
debug("cache_article: hit: " + id);
}
}
function cache_find(id) {
for (var i = 0; i < article_cache.length; i++) {
if (article_cache[i]["id"] == id) {
return article_cache[i]["data"];
}
}
return false;
}
function cache_check(id) {
for (var i = 0; i < article_cache.length; i++) {
if (article_cache[i]["id"] == id) {
return true;
}
}
return false;
}
function cache_expire() {
while (article_cache.length > 20) {
article_cache.shift();
}
}
function cache_invalidate(id) {
var i = 0
try {
while (i < article_cache.length) {
if (article_cache[i]["id"] == id) {
debug("cache_invalidate: removed id " + id);
article_cache.splice(i, 1);
return true;
}
i++;
}
debug("cache_invalidate: id not found: " + id);
return false;
} catch (e) {
exception_error("cache_invalidate", e);
}
}