mirror of
https://github.com/kkapsner/CanvasBlocker
synced 2024-12-22 12:50:36 +01:00
Changed to getter approach
- no "visible vs. invisible" possible
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kkapsner
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329
data/inject.js
329
data/inject.js
@ -2,215 +2,94 @@
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(function(){
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"use strict";
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var originalGetContext = unsafeWindow.HTMLCanvasElement.prototype.getContext;
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var originalToDataURL = unsafeWindow.HTMLCanvasElement.prototype.toDataURL;
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var originalGetImageData = unsafeWindow.CanvasRenderingContext2D.prototype.getImageData;
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var askFunctionName = Math.random().toString(16);
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var blockMode = {
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getContext: {
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status: "block",
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askStatus: {
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askOnce: false,
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alreadyAsked: false,
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answer: null
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}
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},
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readAPI: {
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status: "allow"
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}
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};
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function transformFunctionToUnsafeWindow(func, name){
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var funcString = func.toString();
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var parameter = funcString.match(/^function\s*\(([^\)]*)\)\s*\{/)[1];
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funcString = funcString
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.replace(/^function\s*\(([^\)]*)\)\s*\{|\}\s*$/g, "")
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.replace(/(^|\n|\r)\t{3}/g, "$1")
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.replace(/askFunctionName/g, JSON.stringify(askFunctionName))
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.replace(/askForPermission/g, _("askForPermission"))
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.replace(/askForInvisiblePermission/g, _("askForInvisiblePermission"));
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var unsafeFunction = new unsafeWindow.Function(parameter, funcString);
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unsafeFunction.toString =
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unsafeFunction.toLocaleString =
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unsafeFunction.toSource = new unsafeWindow.Function(
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"return \"function " + name + "() {\\n [native code]\\n}\";"
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);
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return unsafeFunction;
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}
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function setAPIFunctions(getContext, toDataURL, getImageData){
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delete unsafeWindow.HTMLCanvasElement.prototype[askFunctionName];
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if (getContext){
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if (getContext === true){
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getContext = originalGetContext;
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}
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else {
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var secretObject = new unsafeWindow.Object();
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Object.defineProperties(
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secretObject,
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{
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getContext: {value: originalGetContext},
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confirm: {value: unsafeWindow.confirm}
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}
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);
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Object.defineProperty(
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unsafeWindow.HTMLCanvasElement.prototype,
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askFunctionName,
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{
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value: secretObject,
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configurable: true,
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enumerable: false
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}
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);
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getContext = transformFunctionToUnsafeWindow(getContext, "getContext");
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}
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}
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unsafeWindow.HTMLCanvasElement.prototype.getContext = getContext;
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if (toDataURL){
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if (toDataURL === true){
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toDataURL = originalToDataURL;
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}
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else {
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toDataURL = transformFunctionToUnsafeWindow(toDataURL, "toDataURL");
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}
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}
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unsafeWindow.HTMLCanvasElement.prototype.toDataURL = toDataURL;
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if (getImageData){
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if (getImageData === true){
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getImageData = originalGetImageData;
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}
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else {
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getImageData = transformFunctionToUnsafeWindow(getImageData, "getImageData");
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}
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}
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unsafeWindow.CanvasRenderingContext2D.prototype.getImageData = getImageData;
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}
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function checkPDF(blocking){
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if (document.contentType.match(/\/pdf$/i)){
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self.port.emit("isPDF", blocking);
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return true;
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}
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return false;
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}
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function block(force){
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if (force || !checkPDF("block")){
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setAPIFunctions(null, null, null);
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}
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}
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function askVisible(force, askOnlyOnce){
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if (force || !checkPDF("askVisible")){
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setAPIFunctions(
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askOnlyOnce?
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function(){
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if (this.parentNode){
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var oldBorder = this.style.border;
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this.style.border = "2px dashed red";
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var confirmText = "askForPermission";
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// try {throw new Error();}
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// catch (e){
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// console.log(e.stack.split(/\s*(?:-?>|@)\s*/));
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// }
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var allow = this[askFunctionName].confirm.call(window, confirmText);
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this.style.border = oldBorder;
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if (allow){
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HTMLCanvasElement.prototype.getContext = this[askFunctionName].getContext;
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delete HTMLCanvasElement.prototype[askFunctionName];
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return this.getContext.apply(this, arguments);
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var undef;
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var originalGetContext = unsafeWindow.HTMLCanvasElement.prototype.getContext;
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Object.defineProperty(
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unsafeWindow.HTMLCanvasElement.prototype,
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"getContext",
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{
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enumerable: true,
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configureable: false,
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get: exportFunction(function(){
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switch (blockMode.getContext.status){
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case "allow":
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// console.log("allow");
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return originalGetContext;
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case "ask":
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// console.log("ask");
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var status = blockMode.getContext.askStatus;
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var allow;
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if (status.askOnce && status.alreadyAsked){
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// console.log("already asked");
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allow = status.answer;
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}
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else {
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HTMLCanvasElement.prototype.getContext = null;
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delete HTMLCanvasElement.prototype[askFunctionName];
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return null;
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// console.log("asking");
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allow = window.confirm(_("askForPermission"));
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status.alreadyAsked = true;
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status.answer = allow;
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}
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}
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else {
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return null;
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}
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}:
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function(){
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if (this.parentNode){
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var oldBorder = this.style.border;
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this.style.border = "2px dashed red";
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var confirmText = "askForPermission";
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// try {throw new Error();}
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// catch (e){
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// console.log(e.stack.split(/\s*(?:-?>|@)\s*/));
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// }
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var allow = this[askFunctionName].confirm.call(window, confirmText);
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this.style.border = oldBorder;
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if (allow){
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this.getContext = this[askFunctionName].getContext;
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return this.getContext.apply(this, arguments);
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}
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else {
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this.getContext = null;
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return null;
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}
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}
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else {
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return null;
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}
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},
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true,
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true
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);
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}
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}
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function askInvisible(force, askOnlyOnce){
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if (force || !checkPDF("askInvisible")){
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setAPIFunctions(
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askOnlyOnce?
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function(){
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var oldBorder = this.style.border;
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this.style.border = "2px dashed red";
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var confirmText =
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this.parentNode?
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"askForPermission":
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"askForInvisiblePermission";
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var allow = this[askFunctionName].confirm.call(window, confirmText);
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this.style.border = oldBorder;
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if (allow){
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HTMLCanvasElement.prototype.getContext = this[askFunctionName].getContext;
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delete HTMLCanvasElement.prototype[askFunctionName];
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return this.getContext.apply(this, arguments);
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}
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else {
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HTMLCanvasElement.prototype.getContext = null;
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delete HTMLCanvasElement.prototype[askFunctionName];
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return null;
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}
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}:
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function(){
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var oldBorder = this.style.border;
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this.style.border = "2px dashed red";
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var confirmText =
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this.parentNode?
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"askForPermission":
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"askForInvisiblePermission";
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var allow = this[askFunctionName].confirm.call(window, confirmText);
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this.style.border = oldBorder;
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if (allow){
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this.getContext = this[askFunctionName].getContext;
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return this.getContext.apply(this, arguments);
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}
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else {
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this.getContext = null;
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return null;
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}
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},
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true,
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true
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);
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}
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}
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function blockReadout(force){
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if (force || !checkPDF("blockReadout")){
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setAPIFunctions(
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true,
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function(){
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return "data:image/png;base64";
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},
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function(sx, sy, sw, sh){
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var imageData = this.createImageData(sw, sh);
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return imageData;
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return allow? originalGetContext: undef;
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case "block":
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default:
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// console.log("block");
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return undef;
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}
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);
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}, unsafeWindow)
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}
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}
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function unblock(){
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setAPIFunctions(true, true, true);
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}
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);
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var originalToDataURL = unsafeWindow.HTMLCanvasElement.prototype.toDataURL;
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Object.defineProperty(
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unsafeWindow.HTMLCanvasElement.prototype,
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"toDataURL",
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{
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enumerable: true,
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configureable: false,
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get: exportFunction(function(){
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switch (blockMode.readAPI.status){
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case "allow":
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return originalToDataURL;
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case "block":
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default:
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return undef;
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}
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}, unsafeWindow)
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}
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);
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var originalGetImageData = unsafeWindow.CanvasRenderingContext2D.prototype.getImageData;
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Object.defineProperty(
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unsafeWindow.CanvasRenderingContext2D.prototype,
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"getImageData",
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{
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enumerable: true,
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configureable: false,
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get: exportFunction(function(){
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switch (blockMode.readAPI.status){
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case "allow":
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return originalGetImageData;
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case "block":
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default:
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return undef;
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}
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}, unsafeWindow)
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}
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);
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var _ = function(name){
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return _[name] || name;
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@ -218,12 +97,40 @@
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self.port.on("setTranslation", function(name, translation){
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_[name] = translation;
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});
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block();
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self.port.on("block", block);
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self.port.on("askVisible", askVisible);
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self.port.on("askInvisible", askInvisible);
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self.port.on("blockReadout", blockReadout);
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self.port.on("unblock", unblock);
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//self.port.on("detach", unblock); // produces memory leak due to the reference to unsafeWindow
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function checkPDF(blocking){
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if (document.contentType.match(/\/pdf$/i)){
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self.port.emit("isPDF", blocking);
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return true;
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}
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return false;
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}
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self.port.on("block", function(force){
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if (force || !checkPDF("block")){
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blockMode.getContext.status = "block";
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blockMode.readAPI.status = "allow";
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}
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});
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self.port.on("ask", function(force, askOnce){
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if (force || !checkPDF("askVisible")){
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blockMode.getContext.status = "ask";
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blockMode.getContext.askStatus.askOnce = askOnce;
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blockMode.readAPI.status = "allow";
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}
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});
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self.port.on("blockReadout", function(force){
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if (force || !checkPDF("blockReadout")){
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blockMode.getContext.status = "allow";
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blockMode.readAPI.status = "block";
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}
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});
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self.port.on("unblock", function(){
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blockMode.getContext.status = "allow";
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blockMode.readAPI.status = "allow";
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});
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self.port.on("detach", function(force){
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blockMode.getContext.status = "allow";
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blockMode.readAPI.status = "allow";
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});
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}());
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152
lib/main.js
152
lib/main.js
@ -42,12 +42,18 @@
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var self = require("sdk/self");
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var pageMod = require("sdk/page-mod");
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var array = require("sdk/util/array");
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var preferences = require("sdk/simple-prefs");
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var prefs = preferences.prefs;
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var {URL} = require("sdk/url");
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var _ = require("sdk/l10n").get;
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// preferences
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Object.keys(prefs).forEach(function(pref){
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preferences.on(pref, function(){
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workers.forEach(checkWorker);
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});
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});
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var whiteList;
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function updateWhiteList(){
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whiteList = getDomainRegExpList(prefs.whiteList);
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@ -55,7 +61,6 @@
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updateWhiteList();
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preferences.on("whiteList", function(){
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updateWhiteList();
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// workers.forEach(checkWorker);
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});
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var blackList;
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@ -65,100 +70,84 @@
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updateBlackList();
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preferences.on("blackList", function(){
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updateBlackList();
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// workers.forEach(checkWorker);
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});
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// preferences.on("blockMode", function(){
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// workers.forEach(checkWorker);
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// });
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// preferences.on("allowPDFCanvas", function(){
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// workers.forEach(checkWorker);
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// });
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// var workers = [];
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// function detachWorker(worker, workerArray) {
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// var index = workerArray.indexOf(worker);
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// if (index !== -1){
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// workerArray.splice(index, 1);
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// }
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// }
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function checkWorker(worker){
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var url = new URL(worker.url);
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var mode = "block";
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switch (prefs.blockMode){
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case "blockEverything":
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mode = "block";
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break;
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case "allowOnlyWhiteList":
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if (whiteList.match(url)){
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mode = "unblock";
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}
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else {
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try {
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var url = new URL(worker.url);
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var mode = "block";
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switch (prefs.blockMode){
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case "blockEverything":
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mode = "block";
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}
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break;
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case "askVisible":
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if (whiteList.match(url)){
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break;
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case "allowOnlyWhiteList":
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if (whiteList.match(url)){
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mode = "unblock";
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}
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else {
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mode = "block";
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}
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break;
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case "ask":
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if (whiteList.match(url)){
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mode = "unblock";
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}
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else if (blackList.match(url)){
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mode = "block";
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}
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else {
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mode = "ask";
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}
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break;
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case "blockReadout":
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if (whiteList.match(url)){
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mode = "unblock";
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}
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else if (blackList.match(url)){
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mode = "block";
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}
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else {
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mode = "blockReadout";
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}
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break;
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case "blockOnlyBlackList":
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if (blackList.match(url)){
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mode = "block";
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}
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else {
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mode = "unblock";
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}
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break;
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case "allowEverything":
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mode = "unblock";
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}
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else if (blackList.match(url)){
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mode = "block";
|
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}
|
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else {
|
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mode = "askVisible";
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}
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break;
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case "askInvisible":
|
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if (whiteList.match(url)){
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mode = "unblock";
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}
|
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else if (blackList.match(url)){
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mode = "block";
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}
|
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else {
|
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mode = "askInvisible";
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}
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break;
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case "blockReadout":
|
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if (whiteList.match(url)){
|
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mode = "unblock";
|
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}
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else if (blackList.match(url)){
|
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mode = "block";
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}
|
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else {
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mode = "blockReadout";
|
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}
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break;
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case "blockOnlyBlackList":
|
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if (blackList.match(url)){
|
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mode = "block";
|
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}
|
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else {
|
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mode = "unblock";
|
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}
|
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break;
|
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case "allowEverything":
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mode = "unblock";
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break;
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default:
|
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console.log("Unknown blocking mode. Default to block everything.");
|
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break;
|
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default:
|
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console.log("Unknown blocking mode. Default to block everything.");
|
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}
|
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worker.port.emit(mode, false, prefs.askOnlyOnce);
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}
|
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catch (e){
|
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console.log("Error updating " + worker.url + ": " + e.message);
|
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}
|
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worker.port.emit(mode, false, prefs.askOnlyOnce);
|
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}
|
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|
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|
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var workers = [];
|
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pageMod.PageMod({
|
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include: "*",
|
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contentScriptWhen: "start",
|
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contentScriptFile: self.data.url("inject.js"),
|
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onAttach: function(worker){
|
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|
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// workers.push(worker);
|
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// worker.on("detach", function(){
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// detachWorker(this, workers);
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// });
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array.add(workers, worker);
|
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worker.on("pageshow", function(){
|
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array.add(workers, this);
|
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});
|
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worker.on("pagehide", function(){
|
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array.remove(workers, this);
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});
|
||||
worker.on("detach", function(){
|
||||
array.remove(workers, this);
|
||||
});
|
||||
worker.port.on("isPDF", function(blocking){
|
||||
if (prefs.allowPDFCanvas){
|
||||
this.emit("unblock");
|
||||
@ -168,7 +157,6 @@
|
||||
}
|
||||
});
|
||||
worker.port.emit("setTranslation", "askForPermission", _("askForPermission"));
|
||||
worker.port.emit("setTranslation", "askForInvisiblePermission", _("askForInvisiblePermission"));
|
||||
checkWorker(worker);
|
||||
},
|
||||
});
|
||||
|
||||
@ -9,8 +9,7 @@ blockMode_description=
|
||||
|
||||
blockMode_options.block everything= alles blockieren
|
||||
blockMode_options.allow only white list= nur Einträge der Whitelist erlauben
|
||||
blockMode_options.ask for permission for visible <canvas>= bei sichtbaren <canvas> um Erlaubnis fragen
|
||||
blockMode_options.ask for permision for invisible <canvas>= bei unsichtbaren <canvas> um Erlaubnis fragen
|
||||
blockMode_options.ask for permission= um Erlaubnis fragen
|
||||
blockMode_options.block readout API= Auslese-API blockieren
|
||||
blockMode_options.block only black list= nur Einträge der Blacklist blockieren
|
||||
blockMode_options.allow everything= alles erlauben
|
||||
@ -21,5 +20,4 @@ askOnlyOnce_description= Wenn eine Seite öfters versucht, die <canvas>-API abzu
|
||||
allowPDFCanvas_title= <canvas> in PDFs erlauben
|
||||
allowPDFCanvas_description= Die native pdf.js verwendet <canvas> um den Inhalt von PDFs anzuzeigen. Wenn dies nicht markiert ist, werden viele Nachfragedialoge erscheinen oder die PDF Ansicht nicht funktionieren.
|
||||
|
||||
askForPermission= Wollen Sie das rot umrandete <canvas> erlauben?
|
||||
askForInvisiblePermission= Wollen Sie ein verstecktes <canvas> erlauben?
|
||||
askForPermission= Wollen Sie <canvas> erlauben?
|
||||
@ -9,8 +9,7 @@ blockMode_description=
|
||||
|
||||
blockMode_options.block everything= block everything
|
||||
blockMode_options.allow only white list= allow only white list
|
||||
blockMode_options.ask for permission for visible <canvas>= ask for permission for visible <canvas>
|
||||
blockMode_options.ask for permision for invisible <canvas>= ask for permision for invisible <canvas>
|
||||
blockMode_options.ask for permission= ask for permission
|
||||
blockMode_options.block readout API= block readout API
|
||||
blockMode_options.block only black list= block only black list
|
||||
blockMode_options.allow everything= allow everything
|
||||
@ -21,5 +20,4 @@ askOnlyOnce_description= If a page tries to access the <canvas>-API several time
|
||||
allowPDFCanvas_title= Allow canvas in PDFs
|
||||
allowPDFCanvas_description= The native pdf.js uses <canvas> to display the PDF content. If this is unchecked there will lots of annoying ask dialogs or the PDF display will not work.
|
||||
|
||||
askForPermission= Do you want to allow the red bordered <canvas>?
|
||||
askForInvisiblePermission= Do you want to allow an invisibe <canvas>?
|
||||
askForPermission= Do you want to allow <canvas>?
|
||||
12
package.json
12
package.json
@ -20,7 +20,7 @@
|
||||
"name": "blockMode",
|
||||
"title": "block mode",
|
||||
"type": "menulist",
|
||||
"value": "askVisible",
|
||||
"value": "ask",
|
||||
"options": [
|
||||
{
|
||||
"value": "blockEverything",
|
||||
@ -31,12 +31,8 @@
|
||||
"label": "allow only white list"
|
||||
},
|
||||
{
|
||||
"value": "askVisible",
|
||||
"label": "ask for permission for visible <canvas>"
|
||||
},
|
||||
{
|
||||
"value": "askInvisible",
|
||||
"label": "ask for permision for invisible <canvas>"
|
||||
"value": "ask",
|
||||
"label": "ask for permission"
|
||||
},
|
||||
{
|
||||
"value": "blockReadout",
|
||||
@ -56,7 +52,7 @@
|
||||
"name": "askOnlyOnce",
|
||||
"title": "Ask only once",
|
||||
"type": "bool",
|
||||
"value": false
|
||||
"value": true
|
||||
},
|
||||
{
|
||||
"name": "allowPDFCanvas",
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user