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Load selected feed after a short timeout 

Avoid firing multiple server requests if the user is navigating up/down
the tree list with the keyboard. Instead, wait till the user has stopped
navigating for at least 250ms.
This commit is contained in:
Matt Haley 2013-06-13 22:39:26 -07:00
parent b684a2e665
commit a95e14fb4c
2 changed files with 20 additions and 10 deletions
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26
js/feedlist.js
View File

@ -2,6 +2,7 @@ var _infscroll_disable = 0;
var _infscroll_request_sent = 0; var _infscroll_request_sent = 0;
var _search_query = false; var _search_query = false;
var _viewfeed_last = 0; var _viewfeed_last = 0;
var _viewfeed_timeout = false;
var counters_last_request = 0; var counters_last_request = 0;
@ -52,7 +53,7 @@ function loadMoreHeadlines() {
} }
function viewfeed(feed, method, is_cat, offset, background, infscroll_req) { function viewfeed(feed, method, is_cat, offset, background, infscroll_req, can_wait) {
try { try {
if (is_cat == undefined) if (is_cat == undefined)
is_cat = false; is_cat = false;
@ -132,15 +133,24 @@ function viewfeed(feed, method, is_cat, offset, background, infscroll_req) {
console.log(query); console.log(query);
if (can_wait && _viewfeed_timeout) {
setFeedExpandoIcon(getActiveFeedId(), activeFeedIsCat(), 'images/blank_icon.gif');
clearTimeout(_viewfeed_timeout);
}
setActiveFeedId(feed, is_cat); setActiveFeedId(feed, is_cat);
new Ajax.Request("backend.php", { timeout_ms = can_wait ? 250 : 0;
parameters: query, _viewfeed_timeout = setTimeout(function() {
onComplete: function(transport) {
setFeedExpandoIcon(feed, is_cat, 'images/blank_icon.gif'); new Ajax.Request("backend.php", {
headlines_callback2(transport, offset, background, infscroll_req); parameters: query,
PluginHost.run(PluginHost.HOOK_FEED_LOADED, [feed, is_cat]); onComplete: function(transport) {
} }); setFeedExpandoIcon(feed, is_cat, 'images/blank_icon.gif');
headlines_callback2(transport, offset, background, infscroll_req);
PluginHost.run(PluginHost.HOOK_FEED_LOADED, [feed, is_cat]);
} });
}, timeout_ms); // Wait 250ms
} catch (e) { } catch (e) {
exception_error("viewfeed", e); exception_error("viewfeed", e);

4
js/tt-rss.js
View File

@ -272,13 +272,13 @@ function init() {
var rv = dijit.byId("feedTree").getNextFeed( var rv = dijit.byId("feedTree").getNextFeed(
getActiveFeedId(), activeFeedIsCat()); getActiveFeedId(), activeFeedIsCat());
if (rv) viewfeed(rv[0], '', rv[1]); if (rv) viewfeed(rv[0], '', rv[1], null, null, null, true);
}; };
hotkey_actions["prev_feed"] = function() { hotkey_actions["prev_feed"] = function() {
var rv = dijit.byId("feedTree").getPreviousFeed( var rv = dijit.byId("feedTree").getPreviousFeed(
getActiveFeedId(), activeFeedIsCat()); getActiveFeedId(), activeFeedIsCat());
if (rv) viewfeed(rv[0], '', rv[1]); if (rv) viewfeed(rv[0], '', rv[1], null, null, null, true);
}; };
hotkey_actions["next_article"] = function() { hotkey_actions["next_article"] = function() {
moveToPost('next'); moveToPost('next');