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24447452ab
We don't currently have a good way of selecting the traits used by a given Xray wrapper. This lets us do that. Note: We add a call to js::UnwrapObject to GetXrayType while hoisting it. When it was used only in WrapperFactory, this was unnecessary, because |obj| was always unwrapped. But for our new purposes, it might not be. Aside from that, there are no changes to the function.
141 lines
4.7 KiB
C++
141 lines
4.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=4 sw=4 et tw=99 ft=cpp:
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "jsapi.h"
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#include "jswrapper.h"
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#include "mozilla/GuardObjects.h"
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// Xray wrappers re-resolve the original native properties on the native
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// object and always directly access to those properties.
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// Because they work so differently from the rest of the wrapper hierarchy,
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// we pull them out of the Wrapper inheritance hierarchy and create a
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// little world around them.
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class XPCWrappedNative;
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namespace xpc {
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JSBool
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holder_get(JSContext *cx, JSHandleObject holder, JSHandleId id, JSMutableHandleValue vp);
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JSBool
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holder_set(JSContext *cx, JSHandleObject holder, JSHandleId id, JSBool strict, JSMutableHandleValue vp);
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namespace XrayUtils {
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extern JSClass HolderClass;
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bool CloneExpandoChain(JSContext *cx, JSObject *src, JSObject *dst);
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bool
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IsTransparent(JSContext *cx, JSObject *wrapper);
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JSObject *
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GetNativePropertiesObject(JSContext *cx, JSObject *wrapper);
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}
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class XrayTraits;
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class XPCWrappedNativeXrayTraits;
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class ProxyXrayTraits;
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class DOMXrayTraits;
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enum XrayType {
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XrayForDOMObject,
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XrayForDOMProxyObject,
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XrayForWrappedNative,
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NotXray
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};
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XrayType GetXrayType(JSObject *obj);
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XrayTraits* GetXrayTraits(JSObject *obj);
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// NB: Base *must* derive from JSProxyHandler
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template <typename Base, typename Traits = XPCWrappedNativeXrayTraits >
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class XrayWrapper : public Base {
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public:
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XrayWrapper(unsigned flags);
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virtual ~XrayWrapper();
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/* Fundamental proxy traps. */
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virtual bool getPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id,
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bool set, js::PropertyDescriptor *desc);
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virtual bool getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id,
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bool set, js::PropertyDescriptor *desc);
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virtual bool defineProperty(JSContext *cx, JSObject *wrapper, jsid id,
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js::PropertyDescriptor *desc);
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virtual bool getOwnPropertyNames(JSContext *cx, JSObject *wrapper,
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js::AutoIdVector &props);
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virtual bool delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
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virtual bool enumerate(JSContext *cx, JSObject *wrapper, js::AutoIdVector &props);
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/* Derived proxy traps. */
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virtual bool get(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id,
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js::Value *vp);
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virtual bool set(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id,
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bool strict, js::Value *vp);
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virtual bool has(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
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virtual bool hasOwn(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
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virtual bool keys(JSContext *cx, JSObject *wrapper, js::AutoIdVector &props);
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virtual bool iterate(JSContext *cx, JSObject *wrapper, unsigned flags, js::Value *vp);
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virtual bool call(JSContext *cx, JSObject *wrapper, unsigned argc, js::Value *vp);
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virtual bool construct(JSContext *cx, JSObject *wrapper,
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unsigned argc, js::Value *argv, js::Value *rval);
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static XrayWrapper singleton;
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private:
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bool enumerate(JSContext *cx, JSObject *wrapper, unsigned flags,
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JS::AutoIdVector &props);
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};
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typedef XrayWrapper<js::CrossCompartmentWrapper, ProxyXrayTraits > XrayProxy;
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typedef XrayWrapper<js::CrossCompartmentWrapper, DOMXrayTraits > XrayDOM;
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class SandboxProxyHandler : public js::IndirectWrapper {
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public:
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SandboxProxyHandler() : js::IndirectWrapper(0)
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{
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}
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virtual bool getPropertyDescriptor(JSContext *cx, JSObject *proxy, jsid id,
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bool set, js::PropertyDescriptor *desc);
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virtual bool getOwnPropertyDescriptor(JSContext *cx, JSObject *proxy,
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jsid id, bool set,
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js::PropertyDescriptor *desc);
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};
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extern SandboxProxyHandler sandboxProxyHandler;
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class AutoSetWrapperNotShadowing;
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class XPCWrappedNativeXrayTraits;
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class ResolvingId {
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public:
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ResolvingId(JSObject *wrapper, jsid id);
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~ResolvingId();
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bool isXrayShadowing(jsid id);
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bool isResolving(jsid id);
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static ResolvingId* getResolvingId(JSObject *holder);
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static JSObject* getHolderObject(JSObject *wrapper);
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static ResolvingId *getResolvingIdFromWrapper(JSObject *wrapper);
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private:
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friend class AutoSetWrapperNotShadowing;
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friend class XPCWrappedNativeXrayTraits;
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jsid mId;
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JSObject *mHolder;
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ResolvingId *mPrev;
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bool mXrayShadowing;
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};
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}
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