diff options
Diffstat (limited to 'tools/addon-sdk-1.12/lib/sdk/content/content-proxy.js')
| -rw-r--r-- | tools/addon-sdk-1.12/lib/sdk/content/content-proxy.js | 870 |
1 files changed, 0 insertions, 870 deletions
diff --git a/tools/addon-sdk-1.12/lib/sdk/content/content-proxy.js b/tools/addon-sdk-1.12/lib/sdk/content/content-proxy.js deleted file mode 100644 index 76df7f6..0000000 --- a/tools/addon-sdk-1.12/lib/sdk/content/content-proxy.js +++ /dev/null @@ -1,870 +0,0 @@ -/* This Source Code Form is subject to the terms of the Mozilla Public - * License, v. 2.0. If a copy of the MPL was not distributed with this - * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ - -"use strict"; - -/* Trick the linker in order to avoid error on `Components.interfaces` usage. - We are tricking the linker with `require('./content-proxy.js')` from - worjer.js in order to ensure shipping this file! But then the linker think - that this file is going to be used as a CommonJS module where we forbid usage - of `Components`. -*/ -let Ci = Components['interfaces']; - -/** - * Access key that allows privileged code to unwrap proxy wrappers through - * valueOf: - * let xpcWrapper = proxyWrapper.valueOf(UNWRAP_ACCESS_KEY); - * This key should only be used by proxy unit test. - */ - const UNWRAP_ACCESS_KEY = {}; - - - /** - * Returns a closure that wraps arguments before calling the given function, - * which can be given to native functions that accept a function, such that when - * the closure is called, the given function is called with wrapped arguments. - * - * @param fun {Function} - * the function for which to create a closure wrapping its arguments - * @param obj {Object} - * target object from which `fun` comes from - * (optional, for debugging purpose) - * @param name {String} - * name of the attribute from which `fun` is binded on `obj` - * (optional, for debugging purpose) - * - * Example: - * function contentScriptListener(event) {} - * let wrapper = ContentScriptFunctionWrapper(contentScriptListener); - * xray.addEventListener("...", wrapper, false); - * -> Allow to `event` to be wrapped - */ -function ContentScriptFunctionWrapper(fun, obj, name) { - if ("___proxy" in fun && typeof fun.___proxy == "function") - return fun.___proxy; - - let wrappedFun = function () { - let args = []; - for (let i = 0, l = arguments.length; i < l; i++) - args.push(wrap(arguments[i])); - - //console.log("Called from native :"+obj+"."+name); - //console.log(">args "+arguments.length); - //console.log(fun); - - // Native code can execute this callback with `this` being the wrapped - // function. For example, window.mozRequestAnimationFrame. - if (this == wrappedFun) - return fun.apply(fun, args); - - return fun.apply(wrap(this), args); - }; - - Object.defineProperty(fun, "___proxy", {value : wrappedFun, - writable : false, - enumerable : false, - configurable : false}); - - return wrappedFun; -} - -/** - * Returns a closure that unwraps arguments before calling the `fun` function, - * which can be used to build a wrapper for a native function that accepts - * wrapped arguments, since native function only accept unwrapped arguments. - * - * @param fun {Function} - * the function to wrap - * @param originalObject {Object} - * target object from which `fun` comes from - * (optional, for debugging purpose) - * @param name {String} - * name of the attribute from which `fun` is binded on `originalObject` - * (optional, for debugging purpose) - * - * Example: - * wrapper.appendChild = NativeFunctionWrapper(xray.appendChild, xray); - * wrapper.appendChild(anotherWrapper); - * -> Allow to call xray.appendChild with unwrapped version of anotherWrapper - */ -function NativeFunctionWrapper(fun, originalObject, name) { - return function () { - let args = []; - let obj = this && typeof this.valueOf == "function" ? - this.valueOf(UNWRAP_ACCESS_KEY) : this; - - for (let i = 0, l = arguments.length; i < l; i++) - args.push( unwrap(arguments[i], obj, name) ); - - //if (name != "toString") - //console.log(">>calling native ["+(name?name:'#closure#')+"]: \n"+fun.apply+"\n"+obj+"\n("+args.join(', ')+")\nthis :"+obj+"from:"+originalObject+"\n"); - - // Need to use Function.prototype.apply.apply because XMLHttpRequest - // is a function (typeof return 'function') and fun.apply is null :/ - let unwrapResult = Function.prototype.apply.apply(fun, [obj, args]); - let result = wrap(unwrapResult, obj, name); - - //console.log("<< "+rr+" -> "+r); - - return result; - }; -} - -/* - * Unwrap a JS value that comes from the content script. - * Mainly converts proxy wrapper to XPCNativeWrapper. - */ -function unwrap(value, obj, name) { - //console.log("unwrap : "+value+" ("+name+")"); - if (!value) - return value; - let type = typeof value; - - // In case of proxy, unwrap them recursively - // (it should not be recursive, just in case of) - if (["object", "function"].indexOf(type) !== -1 && - "__isWrappedProxy" in value) { - while("__isWrappedProxy" in value) - value = value.valueOf(UNWRAP_ACCESS_KEY); - return value; - } - - // In case of functions we need to return a wrapper that converts native - // arguments applied to this function into proxies. - if (type == "function") - return ContentScriptFunctionWrapper(value, obj, name); - - // We must wrap objects coming from content script too, as they may have - // a function that will be called by a native method. - // For example: - // addEventListener(..., { handleEvent: function(event) {} }, ...); - if (type == "object") - return ContentScriptObjectWrapper(value); - - if (["string", "number", "boolean"].indexOf(type) !== -1) - return value; - //console.log("return non-wrapped to native : "+typeof value+" -- "+value); - return value; -} - -/** - * Returns an XrayWrapper proxy object that allow to wrap any of its function - * though `ContentScriptFunctionWrapper`. These proxies are given to - * XrayWrappers in order to automatically wrap values when they call a method - * of these proxies. So that they are only used internaly and content script, - * nor web page have ever access to them. As a conclusion, we can consider - * this code as being safe regarding web pages overload. - * - * - * @param obj {Object} - * object coming from content script context to wrap - * - * Example: - * let myListener = { handleEvent: function (event) {} }; - * node.addEventListener("click", myListener, false); - * `event` has to be wrapped, so handleEvent has to be wrapped using - * `ContentScriptFunctionWrapper` function. - * In order to do so, we build this new kind of proxies. - */ -function ContentScriptObjectWrapper(obj) { - if ("___proxy" in obj && typeof obj.___proxy == "object") - return obj.___proxy; - - function valueOf(key) { - if (key === UNWRAP_ACCESS_KEY) - return obj; - return this; - } - - let proxy = Proxy.create({ - // Fundamental traps - getPropertyDescriptor: function(name) { - return Object.getOwnPropertyDescriptor(obj, name); - }, - defineProperty: function(name, desc) { - return Object.defineProperty(obj, name, desc); - }, - getOwnPropertyNames: function () { - return Object.getOwnPropertyNames(obj); - }, - delete: function(name) { - return delete obj[name]; - }, - // derived traps - has: function(name) { - return name === "__isXrayWrapperProxy" || - name in obj; - }, - hasOwn: function(name) { - return Object.prototype.hasOwnProperty.call(obj, name); - }, - get: function(receiver, name) { - if (name == "valueOf") - return valueOf; - let value = obj[name]; - if (!value) - return value; - - return unwrap(value); - }, - set: function(receiver, name, val) { - obj[name] = val; - return true; - }, - enumerate: function() { - var result = []; - for each (let name in obj) { - result.push(name); - }; - return result; - }, - keys: function() { - return Object.keys(obj); - } - }); - - Object.defineProperty(obj, "___proxy", {value : proxy, - writable : false, - enumerable : false, - configurable : false}); - - return proxy; -} - -// List of all existing typed arrays. -// Can be found here: -// http://mxr.mozilla.org/mozilla-central/source/js/src/jsapi.cpp#1790 -const typedArraysCtor = [ - ArrayBuffer, - Int8Array, - Uint8Array, - Int16Array, - Uint16Array, - Int32Array, - Uint32Array, - Float32Array, - Float64Array, - Uint8ClampedArray -]; - -/* - * Wrap a JS value coming from the document by building a proxy wrapper. - */ -function wrap(value, obj, name, debug) { - if (!value) - return value; - let type = typeof value; - if (type == "object") { - // Bug 671016: Typed arrays don't need to be proxified. - // We avoid checking the whole constructor list on all objects - // by doing this check only on non-extensible objects: - if (!Object.isExtensible(value) && - typedArraysCtor.indexOf(value.constructor) !== -1) - return value; - - // Bug 715755: do not proxify COW wrappers - // These wrappers throw an exception when trying to access - // any attribute that is not in a white list - try { - ("nonExistantAttribute" in value); - } - catch(e) { - if (e.message.indexOf("Permission denied to access property") !== -1) - return value; - } - - // We may have a XrayWrapper proxy. - // For example: - // let myListener = { handleEvent: function () {} }; - // node.addEventListener("click", myListener, false); - // When native code want to call handleEvent, - // we go though ContentScriptFunctionWrapper that calls `wrap(this)` - // `this` is the XrayWrapper proxy of myListener. - // We return this object without building a CS proxy as it is already - // a value coming from the CS. - if ("__isXrayWrapperProxy" in value) - return value.valueOf(UNWRAP_ACCESS_KEY); - - // Unwrap object before wrapping it. - // It should not happen with CS proxy objects. - while("__isWrappedProxy" in value) { - value = value.valueOf(UNWRAP_ACCESS_KEY); - } - - if (XPCNativeWrapper.unwrap(value) !== value) - return getProxyForObject(value); - // In case of Event, HTMLCollection or NodeList or ??? - // XPCNativeWrapper.unwrap(value) === value - // but it's still a XrayWrapper so let's build a proxy - return getProxyForObject(value); - } - if (type == "function") { - if (XPCNativeWrapper.unwrap(value) !== value - || (typeof value.toString === "function" && - value.toString().match(/\[native code\]/))) { - return getProxyForFunction(value, NativeFunctionWrapper(value, obj, name)); - } - return value; - } - if (type == "string") - return value; - if (type == "number") - return value; - if (type == "boolean") - return value; - //console.log("return non-wrapped to wrapped : "+value); - return value; -} - -/* - * Wrap an object from the document to a proxy wrapper - */ -function getProxyForObject(obj) { - if (typeof obj != "object") { - let msg = "tried to proxify something other than an object: " + typeof obj; - console.warn(msg); - throw msg; - } - if ("__isWrappedProxy" in obj) { - return obj; - } - // Check if there is a proxy cached on this wrapper, - // but take care of prototype ___proxy attribute inheritance! - if (obj && obj.___proxy && obj.___proxy.valueOf(UNWRAP_ACCESS_KEY) === obj) { - return obj.___proxy; - } - - let proxy = Proxy.create(handlerMaker(obj)); - - Object.defineProperty(obj, "___proxy", {value : proxy, - writable : false, - enumerable : false, - configurable : false}); - return proxy; -} - -/* - * Wrap a function from the document to a proxy wrapper - */ -function getProxyForFunction(fun, callTrap) { - if (typeof fun != "function") { - let msg = "tried to proxify something other than a function: " + typeof fun; - console.warn(msg); - throw msg; - } - if ("__isWrappedProxy" in fun) - return obj; - if ("___proxy" in fun) - return fun.___proxy; - - let proxy = Proxy.createFunction(handlerMaker(fun), callTrap); - - Object.defineProperty(fun, "___proxy", {value : proxy, - writable : false, - enumerable : false, - configurable : false}); - - return proxy; -} - -/* - * Check if a DOM attribute name is an event name. - */ -function isEventName(id) { - if (id.indexOf("on") != 0 || id.length == 2) - return false; - // Taken from: - // http://mxr.mozilla.org/mozilla-central/source/dom/base/nsDOMClassInfo.cpp#7616 - switch (id[2]) { - case 'a' : - return (id == "onabort" || - id == "onafterscriptexecute" || - id == "onafterprint"); - case 'b' : - return (id == "onbeforeunload" || - id == "onbeforescriptexecute" || - id == "onblur" || - id == "onbeforeprint"); - case 'c' : - return (id == "onchange" || - id == "onclick" || - id == "oncontextmenu" || - id == "oncopy" || - id == "oncut" || - id == "oncanplay" || - id == "oncanplaythrough"); - case 'd' : - return (id == "ondblclick" || - id == "ondrag" || - id == "ondragend" || - id == "ondragenter" || - id == "ondragleave" || - id == "ondragover" || - id == "ondragstart" || - id == "ondrop" || - id == "ondurationchange"); - case 'e' : - return (id == "onerror" || - id == "onemptied" || - id == "onended"); - case 'f' : - return id == "onfocus"; - case 'h' : - return id == "onhashchange"; - case 'i' : - return (id == "oninput" || - id == "oninvalid"); - case 'k' : - return (id == "onkeydown" || - id == "onkeypress" || - id == "onkeyup"); - case 'l' : - return (id == "onload" || - id == "onloadeddata" || - id == "onloadedmetadata" || - id == "onloadstart"); - case 'm' : - return (id == "onmousemove" || - id == "onmouseout" || - id == "onmouseover" || - id == "onmouseup" || - id == "onmousedown" || - id == "onmessage"); - case 'p' : - return (id == "onpaint" || - id == "onpageshow" || - id == "onpagehide" || - id == "onpaste" || - id == "onpopstate" || - id == "onpause" || - id == "onplay" || - id == "onplaying" || - id == "onprogress"); - case 'r' : - return (id == "onreadystatechange" || - id == "onreset" || - id == "onresize" || - id == "onratechange"); - case 's' : - return (id == "onscroll" || - id == "onselect" || - id == "onsubmit" || - id == "onseeked" || - id == "onseeking" || - id == "onstalled" || - id == "onsuspend"); - case 't': - return id == "ontimeupdate" - /* - // TODO: Make it work for mobile version - || - (nsDOMTouchEvent::PrefEnabled() && - (id == "ontouchstart" || - id == "ontouchend" || - id == "ontouchmove" || - id == "ontouchenter" || - id == "ontouchleave" || - id == "ontouchcancel"))*/; - - case 'u' : - return id == "onunload"; - case 'v': - return id == "onvolumechange"; - case 'w': - return id == "onwaiting"; - } - - return false; -} - -// XrayWrappers miss some attributes. -// Here is a list of functions that return a value when it detects a miss: -const NODES_INDEXED_BY_NAME = ["IMG", "FORM", "APPLET", "EMBED", "OBJECT"]; -const xRayWrappersMissFixes = [ - - // Fix bug with XPCNativeWrapper on HTMLCollection - // We can only access array item once, then it's undefined :o - function (obj, name) { - let i = parseInt(name); - if (obj.toString().match(/HTMLCollection|NodeList/) && - i >= 0 && i < obj.length) { - return wrap(XPCNativeWrapper(obj.wrappedJSObject[name]), obj, name); - } - return null; - }, - - // Trap access to document["form name"] - // that may refer to an existing form node - // http://mxr.mozilla.org/mozilla-central/source/dom/base/nsDOMClassInfo.cpp#9285 - function (obj, name) { - if ("nodeType" in obj && obj.nodeType == 9) { - let node = obj.wrappedJSObject[name]; - // List of supported tag: - // http://mxr.mozilla.org/mozilla-central/source/content/html/content/src/nsGenericHTMLElement.cpp#1267 - if (node && NODES_INDEXED_BY_NAME.indexOf(node.tagName) != -1) - return wrap(XPCNativeWrapper(node)); - } - return null; - }, - - // Trap access to window["frame name"] and window.frames[i] - // that refer to an (i)frame internal window object - // http://mxr.mozilla.org/mozilla-central/source/dom/base/nsDOMClassInfo.cpp#6824 - function (obj, name) { - if (typeof obj == "object" && "document" in obj) { - // Ensure that we are on a window object - try { - obj.QueryInterface(Ci.nsIDOMWindow); - } - catch(e) { - return null; - } - - // Integer case: - let i = parseInt(name); - if (i >= 0 && i in obj) { - return wrap(XPCNativeWrapper(obj[i])); - } - - // String name case: - if (name in obj.wrappedJSObject) { - let win = obj.wrappedJSObject[name]; - let nodes = obj.document.getElementsByName(name); - for (let i = 0, l = nodes.length; i < l; i++) { - let node = nodes[i]; - if ("contentWindow" in node && node.contentWindow == win) - return wrap(node.contentWindow); - } - } - } - return null; - }, - - // Trap access to form["node name"] - // http://mxr.mozilla.org/mozilla-central/source/dom/base/nsDOMClassInfo.cpp#9477 - function (obj, name) { - if (typeof obj == "object" && "tagName" in obj && obj.tagName == "FORM") { - let match = obj.wrappedJSObject[name]; - let nodes = obj.ownerDocument.getElementsByName(name); - for (let i = 0, l = nodes.length; i < l; i++) { - let node = nodes[i]; - if (node == match) - return wrap(node); - } - } - return null; - } - -]; - -// XrayWrappers have some buggy methods. -// Here is the list of them with functions returning some replacement -// for a given object `obj`: -const xRayWrappersMethodsFixes = { - // postMessage method is checking the Javascript global - // and it expects it to be a window object. - // But in our case, the global object is our sandbox global object. - // See nsGlobalWindow::CallerInnerWindow(): - // http://mxr.mozilla.org/mozilla-central/source/dom/base/nsGlobalWindow.cpp#5893 - // nsCOMPtr<nsPIDOMWindow> win = do_QueryWrappedNative(wrapper); - // win is null - postMessage: function (obj) { - // Ensure that we are on a window object - try { - obj.QueryInterface(Ci.nsIDOMWindow); - } - catch(e) { - return null; - } - - // Create a wrapper that is going to call `postMessage` through `eval` - let f = function postMessage(message, targetOrigin) { - let jscode = "this.postMessage("; - if (typeof message != "string") - jscode += JSON.stringify(message); - else - jscode += "'" + message.toString().replace(/['\\]/g,"\\$&") + "'"; - - targetOrigin = targetOrigin.toString().replace(/['\\]/g,"\\$&"); - - jscode += ", '" + targetOrigin + "')"; - return this.wrappedJSObject.eval(jscode); - }; - return getProxyForFunction(f, NativeFunctionWrapper(f)); - }, - - // Fix mozMatchesSelector uses that is broken on XrayWrappers - // when we use document.documentElement.mozMatchesSelector.call(node, expr) - // It's only working if we call mozMatchesSelector on the node itself. - // SEE BUG 658909: mozMatchesSelector returns incorrect results with XrayWrappers - mozMatchesSelector: function (obj) { - // Ensure that we are on an object to expose this buggy method - try { - // Bug 707576 removed nsIDOMNSElement. - // Can be simplified as soon as Firefox 11 become the minversion - obj.QueryInterface("nsIDOMElement" in Ci ? Ci.nsIDOMElement : - Ci.nsIDOMNSElement); - } - catch(e) { - return null; - } - // We can't use `wrap` function as `f` is not a native function, - // so wrap it manually: - let f = function mozMatchesSelector(selectors) { - return this.mozMatchesSelector(selectors); - }; - - return getProxyForFunction(f, NativeFunctionWrapper(f)); - }, - - // Bug 679054: History API doesn't work with Proxy objects. We have to pass - // regular JS objects on `pushState` and `replaceState` methods. - // In addition, the first argument has to come from the same compartment. - pushState: function (obj) { - // Ensure that we are on an object that expose History API - try { - obj.QueryInterface(Ci.nsIDOMHistory); - } - catch(e) { - return null; - } - let f = function fix() { - // Call native method with JSON objects - // (need to convert `arguments` to an array via `slice`) - return this.pushState.apply(this, JSON.parse(JSON.stringify(Array.slice(arguments)))); - }; - - return getProxyForFunction(f, NativeFunctionWrapper(f)); - }, - replaceState: function (obj) { - // Ensure that we are on an object that expose History API - try { - obj.QueryInterface(Ci.nsIDOMHistory); - } - catch(e) { - return null; - } - let f = function fix() { - // Call native method with JSON objects - // (need to convert `arguments` to an array via `slice`) - return this.replaceState.apply(this, JSON.parse(JSON.stringify(Array.slice(arguments)))); - }; - - return getProxyForFunction(f, NativeFunctionWrapper(f)); - }, - - // Bug 769006: nsIDOMMutationObserver.observe fails with proxy as options - // attributes - observe: function observe(obj) { - // Ensure that we are on a DOMMutation object - try { - // nsIDOMMutationObserver starts with FF14 - if ("nsIDOMMutationObserver" in Ci) - obj.QueryInterface(Ci.nsIDOMMutationObserver); - else - return null; - } - catch(e) { - return null; - } - return function nsIDOMMutationObserverObserveFix(target, options) { - // Gets native/unwrapped this - let self = this && typeof this.valueOf == "function" ? - this.valueOf(UNWRAP_ACCESS_KEY) : this; - // Unwrap the xraywrapper target out of JS proxy - let targetXray = unwrap(target); - // But do not wrap `options` through ContentScriptObjectWrapper - let result = wrap(self.observe(targetXray, options)); - // Finally wrap result into JS proxies - return wrap(result); - }; - } -}; - -/* - * Generate handler for proxy wrapper - */ -function handlerMaker(obj) { - // Overloaded attributes dictionary - let overload = {}; - // Expando attributes dictionary (i.e. onclick, onfocus, on* ...) - let expando = {}; - // Cache of methods overloaded to fix XrayWrapper bug - let methodFixes = {}; - return { - // Fundamental traps - getPropertyDescriptor: function(name) { - return Object.getOwnPropertyDescriptor(obj, name); - }, - defineProperty: function(name, desc) { - return Object.defineProperty(obj, name, desc); - }, - getOwnPropertyNames: function () { - return Object.getOwnPropertyNames(obj); - }, - delete: function(name) { - delete expando[name]; - delete overload[name]; - return delete obj[name]; - }, - - // derived traps - has: function(name) { - if (name == "___proxy") return false; - if (isEventName(name)) { - // XrayWrappers throw exception when we try to access expando attributes - // even on "name in wrapper". So avoid doing it! - return name in expando; - } - return name in obj || name in overload || name == "__isWrappedProxy" || - undefined !== this.get(null, name); - }, - hasOwn: function(name) { - return Object.prototype.hasOwnProperty.call(obj, name); - }, - get: function(receiver, name) { - if (name == "___proxy") - return undefined; - - // Overload toString in order to avoid returning "[XrayWrapper [object HTMLElement]]" - // or "[object Function]" for function's Proxy - if (name == "toString") { - // Bug 714778: we should not pass obj.wrappedJSObject.toString - // in order to avoid sharing its proxy between two contents scripts. - // (not that `unwrappedObj` can be equal to `obj` when `obj` isn't - // an xraywrapper) - let unwrappedObj = XPCNativeWrapper.unwrap(obj); - return wrap(function () { - return unwrappedObj.toString.call( - this.valueOf(UNWRAP_ACCESS_KEY), arguments); - }, obj, name); - } - - // Offer a way to retrieve XrayWrapper from a proxified node through `valueOf` - if (name == "valueOf") - return function (key) { - if (key === UNWRAP_ACCESS_KEY) - return obj; - return this; - }; - - // Return overloaded value if there is one. - // It allows to overload native methods like addEventListener that - // are not saved, even on the wrapper itself. - // (And avoid some methods like toSource from being returned here! [__proto__ test]) - if (name in overload && - overload[name] != Object.getPrototypeOf(overload)[name] && - name != "__proto__") { - return overload[name]; - } - - // Catch exceptions thrown by XrayWrappers when we try to access on* - // attributes like onclick, onfocus, ... - if (isEventName(name)) { - //console.log("expando:"+obj+" - "+obj.nodeType); - return name in expando ? expando[name].original : undefined; - } - - // Overload some XrayWrappers method in order to fix its bugs - if (name in methodFixes && - methodFixes[name] != Object.getPrototypeOf(methodFixes)[name] && - name != "__proto__") - return methodFixes[name]; - if (Object.keys(xRayWrappersMethodsFixes).indexOf(name) !== -1) { - let fix = xRayWrappersMethodsFixes[name](obj); - if (fix) - return methodFixes[name] = fix; - } - - let o = obj[name]; - - // XrayWrapper miss some attributes, try to catch these and return a value - if (!o) { - for each(let atttributeFixer in xRayWrappersMissFixes) { - let fix = atttributeFixer(obj, name); - if (fix) - return fix; - } - } - - // Generic case - return wrap(o, obj, name); - - }, - - set: function(receiver, name, val) { - - if (isEventName(name)) { - //console.log("SET on* attribute : " + name + " / " + val + "/" + obj); - let shortName = name.replace(/^on/,""); - - // Unregister previously set listener - if (expando[name]) { - obj.removeEventListener(shortName, expando[name], true); - delete expando[name]; - } - - // Only accept functions - if (typeof val != "function") - return false; - - // Register a new listener - let original = val; - val = ContentScriptFunctionWrapper(val); - expando[name] = val; - val.original = original; - obj.addEventListener(name.replace(/^on/, ""), val, true); - return true; - } - - obj[name] = val; - - // Handle native method not overloaded on XrayWrappers: - // obj.addEventListener = val; -> obj.addEventlistener = native method - // And, XPCNativeWrapper bug where nested values appear to be wrapped: - // obj.customNestedAttribute = val -> obj.customNestedAttribute !== val - // obj.customNestedAttribute = "waive wrapper something" - // SEE BUG 658560: Fix identity problem with CrossOriginWrappers - // TODO: check that DOM can't be updated by the document itself and so overloaded value becomes wrong - // but I think such behavior is limited to primitive type - if ((typeof val == "function" || typeof val == "object") && name) { - overload[name] = val; - } - - return true; - }, - - enumerate: function() { - var result = []; - for each (let name in Object.keys(obj)) { - result.push(name); - }; - return result; - }, - - keys: function() { - return Object.keys(obj); - } - }; -}; - - -/* - * Wrap an object from the document to a proxy wrapper. - */ -function create(object) { - if ("wrappedJSObject" in object) - object = object.wrappedJSObject; - let xpcWrapper = XPCNativeWrapper(object); - // If we can't build an XPCNativeWrapper, it doesn't make sense to build - // a proxy. All proxy code is based on having such wrapper that store - // different JS attributes set. - // (we can't build XPCNativeWrapper when object is from the same - // principal/domain) - if (object === xpcWrapper) { - return object; - } - return getProxyForObject(xpcWrapper); -} |