Added fake for readPixels and removed new tab bug

Bug description: if a new tab is opened the wrong blockmode could be
used.

lib/sharedFunctions.js

@@ -0,0 +1,89 @@
+function getDomainRegExpList(domainList){
+	var list = domainList
+		.split(",")
+		.map(function(entry){
+			return entry.replace(/^\s+|\s+$/g, "");
+		})
+		.filter(function(entry){
+			return !!entry.length;
+		})
+		.map(function(entry){
+			var regExp;
+			var domain = !!entry.match(/^[\w.]+$/);
+			if (domain){
+				regExp = new RegExp("(?:^|\\.)" + entry.replace(/([\\\+\*\?\[\^\]\$\(\)\{\}\=\!\|\.])/g, "\\$1") + "\\.?$", "i");
+			}
+			else {
+				regExp = new RegExp(entry, "i");
+			}
+			return {
+				match: function(url){
+					if (domain){
+						return url.hostname.match(regExp);
+					}
+					else {
+						return url.href.match(regExp);
+					}
+				}
+			};
+		});
+		
+		list.match = function(url){
+			return this.some(function(entry){
+				return entry.match(url);
+			});
+		};
+		
+		return list;
+}
+
+function checkURL(url, blockMode, whiteList, blackList){
+	var mode = "block";
+	switch (blockMode){
+		case "blockEverything":
+			mode = "block";
+			break;
+		case "allowOnlyWhiteList":
+			if (url && whiteList.match(url)){
+				mode = "unblock";
+			}
+			else {
+				mode = "block";
+			}
+			break;
+		case "ask":
+		case "blockReadout":
+		case "fakeReadout":
+		case "askReadout":
+			if (url && whiteList.match(url)){
+				mode = "unblock";
+			}
+			else if (url && blackList.match(url)){
+				mode = "block";
+			}
+			else {
+				mode = blockMode;
+			}
+			break;
+		case "blockOnlyBlackList":
+			if (url && blackList.match(url)){
+				mode = "block";
+			}
+			else {
+				mode = "unblock";
+			}
+			break;
+		case "allowEverything":
+			mode = "unblock";
+			break;
+		default:
+			console.log("Unknown blocking mode (" + blockMode + "). Default to block everything.");
+	}
+	return mode;
+}
+
+try {
+	exports.getDomainRegExpList = getDomainRegExpList;
+	exports.checkURL = checkURL;
+}
+catch(e){}