exception handling in some code blocks

feedlist.js

@@ -1,10 +1,9 @@
 
 function viewfeed(feed, skip, subop, doc) {
+	try {
 
 		if (!doc) doc = parent.document;
 	
-//	p_notify("Loading headlines...");
-
 		enableHotkeys();
 	
 		var searchbox = doc.getElementById("searchbox");
@@ -98,7 +97,9 @@ function viewfeed(feed, skip, subop, doc) {
 		} */
 	
 	//	notify("");
-
+	} catch (e) {
+		exception_error("viewfeed", e);
+	}		
 }
 
 function localHotkeyHandler(keycode) {

functions.js

@@ -1,5 +1,10 @@
 var hotkeys_enabled = true;
 
+function exception_error(location, e) {
+	alert("Exception: " + e.name + "\nMessage: " + e.message + 
+		"\nLocation: " + location);
+}
+
 function disableHotkeys() {
 	hotkeys_enabled = false;
 }
@@ -330,7 +335,7 @@ if (!xmlhttp_rpc && typeof XMLHttpRequest!='undefined') {
 
 function all_counters_callback() {
 	if (xmlhttp_rpc.readyState == 4) {
-
+		try {
 			if (!xmlhttp_rpc.responseXML) {
 				notify("[all_counters_callback] backend did not return valid XML");
 				return;
@@ -373,6 +378,9 @@ function all_counters_callback() {
 					}			
 				}
 			}
+		} catch (e) {
+			exception_error("all_counters_callback", e);
+		}
 	}
 }
 
@@ -506,4 +514,3 @@ function getSelectedTableRowIds(content_id, prefix) {
 
 }
 
-

prefs.js

@@ -28,8 +28,8 @@ if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
 }
 
 function feedlist_callback() {
-	var container = document.getElementById('prefContent');
 	if (xmlhttp.readyState == 4) {
+		var container = document.getElementById('prefContent');	
 		container.innerHTML=xmlhttp.responseText;
 		if (active_feed) {
 			var row = document.getElementById("FEEDR-" + active_feed);
@@ -1146,8 +1146,9 @@ function selectTab(id) {
 
 function init() {
 
-	// IE kludge
+	try {
 	
+		// IE kludge
 		if (!xmlhttp) {
 			document.getElementById("prefContent").innerHTML = 
 				"<b>Fatal error:</b> This program needs XmlHttpRequest " + 
@@ -1159,32 +1160,11 @@ function init() {
 	
 		document.onkeydown = hotkey_handler;
 		notify("");
-
+	} catch (e) {
+		exception_error("init", e);
 	}
-
-/*
-var help_topic_id = false;
-
-function do_dispOptionHelp() {
-
-	if (!xmlhttp_ready(xmlhttp))
-		return;
-
-	xmlhttp.open("GET", "backend.php?op=pref-prefs&subop=getHelp&pn=" +
-		param_escape(help_topic_id), true);
-	xmlhttp.onreadystatechange=gethelp_callback;
-	xmlhttp.send(null);
-
 }
 
-function dispOptionHelp(event, sender) {
-
-	help_topic_id = sender.id;
-
-//	document.setTimeout("do_dispOptionHelp()", 100);
-
-} */
-
 function closeInfoBox() {
 	var box = document.getElementById('infoBox');
 	var shadow = document.getElementById('infoBoxShadow');

tt-rss.css

@@ -386,13 +386,10 @@ a.button {
 	font-weight : bold;
 }
 
-.evenSelected {
+.evenSelected, .oddSelected {
 	background-color : #e0e0ff;
 }
 
-.oddSelected {
-	background-color : #e0e0ff;
-} 
 
 /*
 .feedUnreadSelected, .feedSelectedUnread, 

tt-rss.js

@@ -62,8 +62,7 @@ function dialog_refresh_callback() {
 
 function refetch_callback() {
 	if (xmlhttp.readyState == 4) {
-
+		try {
-//		document.title = "Tiny Tiny RSS";
 
 			if (!xmlhttp.responseXML) {
 				notify("refetch_callback: backend did not return valid XML");
@@ -118,7 +117,9 @@ function refetch_callback() {
 	
 			updateTitle("");
 			notify("All feeds updated.");
-
+		} catch (e) {
+			exception_error("refetch_callback", e);
+		}
 	}
 }
 
@@ -126,6 +127,8 @@ function backend_sanity_check_callback() {
 
 	if (xmlhttp.readyState == 4) {
 
+		try {
+		
 			if (!xmlhttp.responseXML) {
 				fatalError(3);
 				return;
@@ -145,25 +148,13 @@ function backend_sanity_check_callback() {
 			}
 	
 			init_second_stage();
+
+		} catch (e) {
+			exception_error("backend_sanity_check_callback", e);
 		}
 	} 
-
-/* wtf this is obsolete
-function updateFeed(feed_id) {
-
-	var query_str = "backend.php?op=rpc&subop=updateFeed&feed=" + feed_id;
-
-	if (xmlhttp_ready(xmlhttp)) {
-		xmlhttp.open("GET", query_str, true);
-		xmlhttp.onreadystatechange=feed_update_callback;
-		xmlhttp.send(null);
-	} else {
-		printLockingError();
 }
 
-}
-*/
-
 function scheduleFeedUpdate(force) {
 
 	notify("Updating feeds in background...");
@@ -343,28 +334,13 @@ function genericSanityCheck() {
 		fatalError(2);
 	}
 
-/*	if (!xmlhttp) {
-		document.getElementById("headlines").innerHTML = 
-			"<b>Fatal error:</b> This program requires XmlHttpRequest " + 
-			"to function properly. Your browser doesn't seem to support it.";
-		return false;
-	}
-
-	setCookie("ttrss_vf_test", "TEST");
-	if (getCookie("ttrss_vf_test") != "TEST") {
-
-		document.getElementById("headlines").innerHTML = 
-			"<b>Fatal error:</b> This program requires cookies " + 
-			"to function properly. Your browser doesn't seem to support them.";
-
-		return false;
-	} */
-
 	return true;
 }
 
 function init() {
 
+	try {
+
 		disableContainerChildren("headlinesToolbar", true);
 
 		if (!genericSanityCheck()) 
@@ -374,10 +350,15 @@ function init() {
 		xmlhttp.onreadystatechange=backend_sanity_check_callback;
 		xmlhttp.send(null);
 
+	} catch (e) {
+		exception_error("init", e);
+	}
 }
 
 function init_second_stage() {
 
+	try {
+
 		setCookie("ttrss_vf_actfeed", "");
 	
 		updateFeedList(false, false);
@@ -407,7 +388,9 @@ function init_second_stage() {
 		if (splash) {
 			splash.style.display = "none";
 		}
-
+	} catch (e) {
+		exception_error("init_second_stage", e);
+	}
 }
 
 function quickMenuGo() {