Added setting to whitelist parts of the canvas API

_locales/de/messages.json

@@ -394,6 +394,15 @@
 		"description": ""
 	},
 	
+	"apiWhiteList_title": {
+		"message": "API Whitelist",
+		"description": ""
+	},
+	"apiWhiteList_description": {
+		"message": "Erlaubt ausgewählte Teile der Canvas-API.",
+		"description": ""
+	},
+	
 	"disableNotifications": {
 		"message": "Benachrichtigungen deaktivieren",
 		"description": ""

_locales/en/messages.json

@@ -393,6 +393,15 @@
 		"message": "Enables the canvas cache. This can prevent detection and increases the performance when small canvas are read several times but decreases it for big canvas.",
 		"description": ""
 	},
+	
+	"apiWhiteList_title": {
+		"message": "API whitelist",
+		"description": ""
+	},
+	"apiWhiteList_description": {
+		"message": "Allows certain parts of the canvas API.",
+		"description": ""
+	},
 
 	"disableNotifications": {
 		"message": "disable notifications",

lib/intercept.js

@@ -227,7 +227,7 @@
 											});
 										}
 										
-										if (funcStatus.active){
+										if (funcStatus.active && !prefs("apiWhiteList")[name]){
 											if (funcStatus.mode === "ask"){
 												funcStatus.mode = ask({
 													window: window,

lib/settingDefinitions.js

@@ -59,6 +59,18 @@
 			defaultValue: "nonPersistent",
 			options: ["white", "nonPersistent", "constant", "persistent"]
 		},
+		{
+			name: "apiWhiteList",
+			defaultValue: {},
+			keys: [
+				"getContext",
+				"toDataURL", "toBlob", "mozGetAsFile", "getImageData",
+				"isPointInPath", "isPointInStroke",
+				"fillText", "strokeText",
+				"readPixels"
+			],
+			defaultKeyValue: false
+		},
 		{
 			name: "useCanvasCache",
 			defaultValue: true

options/optionsGui.js

@@ -127,6 +127,47 @@
 				
 			});
 		}
+		else if (setting.keys){
+			input = document.createElement("table");
+			setting.keys.forEach(function(key){
+				let row = document.createElement("tr");
+				
+				let nameCell = document.createElement("td");
+				nameCell.textContent = key;
+				row.appendChild(nameCell);
+				
+				let keyType = inputTypes[typeof setting.defaultKeyValue];
+				let keyInput = document.createElement("input");
+				keyType.input(keyInput, setting.defaultKeyValue);
+				
+				let inputCell = document.createElement("td");
+				inputCell.appendChild(keyInput);
+				row.appendChild(inputCell);
+				
+				setting.on(function(){
+					var container = setting.get(url);
+					keyType.updateCallback(
+						keyInput,
+						container && container.hasOwnProperty(key)?
+							container[key]:
+							setting.defaultKeyValue,
+						url
+					);
+				});
+				keyInput.addEventListener("change", function(){
+					var value = keyType.getValue(keyInput);
+					var container = setting.get(url);
+					if (!container){
+						container = setting.defaultValue;
+					}
+					container[key] = value;
+					setting.set(container, url);
+					logging.message("changed setting", setting.name, "(", key, "):", value);
+				});
+				input.appendChild(row);
+			});
+		}
+		
 		if (setting.urlSpecific && url === ""){
 			let container = document.createElement("div");
 			container.className = "urlValues collapsed";

options/settingsDisplay.js

@@ -182,6 +182,20 @@
 				}
 			]
 		},
+		{
+			"name": "apiWhiteList",
+			"displayDependencies": [
+				{
+					"blockMode": ["fakeReadout", "fakeInput"],
+					"displayAdvancedSettings": [true]
+				},
+				{
+					"blockMode": ["askReadout", "ask"],
+					"askDenyMode": ["fake"],
+					"displayAdvancedSettings": [true]
+				}
+			]
+		},
 		"notifications",
 		{
 			"name": "showNotifications",

releaseNotes.txt

@@ -3,7 +3,7 @@ Version 0.4.6:
 		-
 	
 	new features:
-		-
+		- Added setting to whitelist parts of the canvas API
 	
 	fixes:
 		-