Remove local patchWindows.js copy (to be replaced by a symlink to the NSCL submodule).
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@ -1,94 +0,0 @@
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"use strict";
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function patchWindow(patchingCallback, env = {}) {
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let nativeExport = this && this.exportFunction || typeof exportFunction == "function";
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if (!nativeExport) {
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// Chromium
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let exportFunction = (func, targetObject, {defineAs}) => {
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let original = targetObject[defineAs];
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console.log(`Setting ${targetObject}.${defineAs}`, func);
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targetObject[defineAs] = new Proxy(original, {
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apply(target, thisArg, args) {
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return func.apply(thisArg, args);
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}
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});
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};
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let cloneInto = (obj, targetObject) => {
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return obj; // dummy for assignment
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};
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let script = document.createElement("script");
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script.text = `
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(() => {
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console.log("Chromium patchWindow");
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let patchWindow = ${patchWindow};
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let cloneInto = ${cloneInto};
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let exportFunction = ${exportFunction};
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({
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patchWindow,
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exportFunction,
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cloneInto,
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}).patchWindow(${patchingCallback}, ${JSON.stringify(env)});
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})();
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`;
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document.documentElement.insertBefore(script, document.documentElement.firstChild);
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script.remove();
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return;
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}
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// win: window object to modify.
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// modifyTarget: callback to function that modifies the desired properties
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// or methods. Callback must take target window as argument.
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function modifyWindow(win, modifyTarget) {
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try {
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modifyTarget(win.wrappedJSObject || win, env);
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modifyWindowOpenMethod(win, modifyTarget);
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modifyFramingElements(win, modifyTarget);
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} catch (e) {
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if (e instanceof DOMException && e.name === "SecurityError") {
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// In case someone tries to access SOP restricted window.
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// We can just ignore this.
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} else throw e;
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}
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}
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function modifyWindowOpenMethod(win, modifyTarget) {
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let windowOpen = win.wrappedJSObject ? win.wrappedJSObject.open : win.open;
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exportFunction(function(...args) {
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let newWin = windowOpen.call(this, ...args);
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if (newWin) modifyWindow(newWin, modifyTarget);
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return newWin;
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}, win, {defineAs: "open"});
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}
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function modifyFramingElements(win, modifyTarget) {
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for (let property of ["contentWindow", "contentDocument"]) {
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for (let iface of ["Frame", "IFrame", "Object"]) {
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let proto = win[`HTML${iface}Element`].prototype;
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modifyContentProperties(proto, property, modifyTarget)
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}
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}
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}
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function modifyContentProperties(proto, property, modifyTarget) {
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let descriptor = Object.getOwnPropertyDescriptor(proto, property);
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let origGetter = descriptor.get;
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let replacementFn;
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if (property === "contentWindow") { replacementFn = function() {
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let win = origGetter.call(this);
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if (win) modifyWindow(win, modifyTarget);
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return win;
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}}
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if (property === "contentDocument") { replacementFn = function() {
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let document = origGetter.call(this);
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if (document && document.defaultView) modifyWindow(document.defaultView, modifyTarget);
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return document;
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}}
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descriptor.get = exportFunction(replacementFn, proto, {defineAs: `get $property`});
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let wrappedProto = proto.wrappedJSObject || proto;
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Object.defineProperty(wrappedProto, property, descriptor);
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}
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return modifyWindow(window, patchingCallback);
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}
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