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Code Issues Releases Wiki Activity

add article prefetching, remove history tracking

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This commit is contained in:
Andrew Dolgov
2007-05-15 06:03:35 +01:00
parent 465ff90b4a
commit e097e8be75
6 changed files with 222 additions and 24 deletions
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141
viewfeed.js
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@@ -16,6 +16,8 @@ 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 {
@@ -66,14 +68,49 @@ function headlines_callback() {
}
}
function article_callback() {
if (xmlhttp.readyState == 4) {
debug("article_callback");
function render_article(article) {
try {
var f = document.getElementById("content-frame");
try {
f.scrollTop = 0;
} catch (e) { };
f.innerHTML = xmlhttp.responseText;
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");
}
} catch (e) {
exception_error("article_callback", e);
}
var date = new Date();
last_article_view = date.getTime() / 1000;
@@ -100,9 +137,13 @@ function view(id, feed_id, skip_history) {
active_real_feed_id = feed_id;
if (!skip_history) {
var cached_article = cache_find(id);
debug("cache check result: " + (cached_article != false));
/* if (!skip_history) {
history_push("ARTICLE:" + id + ":" + feed_id);
}
} */
enableHotkeys();
@@ -119,11 +160,15 @@ function view(id, feed_id, skip_history) {
xmlhttp.abort();
}
if (xmlhttp_ready(xmlhttp)) {
if (cached_article || xmlhttp_ready(xmlhttp)) {
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);
@@ -135,15 +180,55 @@ function view(id, feed_id, skip_history) {
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());
var date = new Date();
var timestamp = Math.round(date.getTime() / 1000);
query = query + "&ts=" + timestamp;
notify_progress("Loading, please wait...");
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) {
render_article(cached_article);
}
cache_expire();
xmlhttp.open("GET", query, true);
xmlhttp.onreadystatechange=article_callback;
xmlhttp.send(null);
} else {
debug("xmlhttp busy (@view)");
printLockingError();
@@ -650,3 +735,37 @@ function cdmWatchdog() {
}
}
function cache_inject(id, article) {
if (!article_cache[id]) {
debug("cache_article: miss: " + id);
var cache_obj = new Array();
var d = new Date();
cache_obj["entered"] = d.getTime() / 1000;
cache_obj["data"] = article;
article_cache[id] = cache_obj;
} else {
debug("cache_article: hit: " + id);
}
}
function cache_find(id) {
if (typeof article_cache[id] != 'undefined') {
return article_cache[id]["data"];
} else {
return false;
}
}
function cache_check(id) {
return typeof article_cache[id] != 'undefined';
}
function cache_expire() {
/* TODO */
}