Added "constant" rng.

_locales/de/messages.json

@@ -133,13 +133,17 @@
 	},
 	
 	"rng_description": {
-		"message": "nicht persistent: die Zufallszahlen werden bei jeder Vortäuschaktion neu bestimmt.\npersistent: für jede Domain werden die Zufallszahlen nur einmal bestimmt.",
+		"message": "nicht persistent: die Zufallszahlen werden bei jeder Vortäuschaktion neu bestimmt.\nkonstant: innerhalb einer Webseite wird eine Farbe immer gleich verändert.\npersistent: für jede Domain werden die Zufallszahlen nur einmal bestimmt.",
 		"description": ""
 	},
 	"rng_options.persistent": {
 		"message": "persistent",
 		"description": ""
 	},
+	"rng_options.constant": {
+		"message": "konstant",
+		"description": ""
+	},
 	"rng_options.non persistent": {
 		"message": "nicht persistent",
 		"description": ""

_locales/en/messages.json

@@ -133,13 +133,17 @@
 	},
 	
 	"rng_description": {
-		"message": "non persistent: the random numbers will be determined freshly for each faking action.\npersistent: the random number will only be determined once for every domain.",
+		"message": "non persistent: the random numbers will be determined freshly for each faking action.\nconstant: within one web page a color will always be faked to the same color.\npersistent: the random number will only be determined once for every domain.",
 		"description": ""
 	},
 	"rng_options.persistent": {
 		"message": "persistent",
 		"description": ""
 	},
+	"rng_options.constant": {
+		"message": "constant",
+		"description": ""
+	},
 	"rng_options.non persistent": {
 		"message": "non persistent",
 		"description": ""

lib/defaultSettings.js

@@ -7,7 +7,7 @@ var settings = {
 	blockMode: "fakeReadout",
 	minFakeSize: 1,
 	maxFakeSize: 0,
-	rng: "nonPersistent",
+	rng: "constant",
 	persistentRndStorage: "",
 	storePersistentRnd: false,
 	askOnlyOnce: true,

lib/intercept.js

@@ -25,6 +25,9 @@
 			case "persistent":
 				setRandomSupply(randomSupplies.persistent);
 				break;
+			case "constant":
+				setRandomSupply(randomSupplies.constant);
+				break;
 			default:
 				setRandomSupply(randomSupplies.nonPersistent);
 		}

lib/randomSupplies.js

@@ -87,6 +87,36 @@
 		}
 	};
 	
+	scope.constant = {
+		getRng: function(length, window){
+			return scope.nonPersistent.getRng(length, window);
+		},
+		getPixelRng: (function(){
+			var colors = Object.create(null);
+			return function getConstantPixelRng(length, window, ignoredColors){
+				var rng = scope.nonPersistent.getRng(1024, window);
+				
+				return function(r, g, b, a, i){
+					var index = String.fromCharCode(r, g, b, a);
+					if (ignoredColors[index]){
+						return [r, g, b, a];
+					}
+					var color = colors[index];
+					if (!color){
+						color = [
+							rng(r, 0),
+							rng(g, 0),
+							rng(b, 0),
+							rng(a, 0)
+						];
+						colors[index] = color;
+					}
+					return color;
+				};
+			};
+		}())
+	};
+	
 	scope.nonPersistent = {
 		getRng: function(length, window){
 			// Initialize the random number batch creation

options/buildPrefInputs.js

@@ -97,6 +97,10 @@ document.body.appendChild(table);
 				"value": "nonPersistent",
 				"label": "non persistent"
 			},
+			{
+				"value": "constant",
+				"label": "constant"
+			},
 			{
 				"value": "persistent",
 				"label": "persistent"