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223 lines
8.5 KiB
C++
223 lines
8.5 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:
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
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* May 28, 2008.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Andreas Gal <gal@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef jswrapper_h___
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#define jswrapper_h___
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#include "jsapi.h"
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#include "jsproxy.h"
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namespace js {
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/* No-op wrapper handler base class. */
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class JS_FRIEND_API(Wrapper) : public ProxyHandler
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{
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uintN mFlags;
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public:
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uintN flags() const { return mFlags; }
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explicit Wrapper(uintN flags);
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typedef enum { PermitObjectAccess, PermitPropertyAccess, DenyAccess } Permission;
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virtual ~Wrapper();
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/* ES5 Harmony fundamental wrapper traps. */
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virtual bool getPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
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PropertyDescriptor *desc);
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virtual bool getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
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PropertyDescriptor *desc);
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virtual bool defineProperty(JSContext *cx, JSObject *wrapper, jsid id,
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PropertyDescriptor *desc);
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virtual bool getOwnPropertyNames(JSContext *cx, JSObject *wrapper, 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, AutoIdVector &props);
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virtual bool fix(JSContext *cx, JSObject *wrapper, Value *vp);
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/* ES5 Harmony derived wrapper traps. */
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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 get(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, Value *vp);
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virtual bool set(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, bool strict,
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Value *vp);
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virtual bool keys(JSContext *cx, JSObject *wrapper, AutoIdVector &props);
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virtual bool iterate(JSContext *cx, JSObject *wrapper, uintN flags, Value *vp);
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/* Spidermonkey extensions. */
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virtual bool call(JSContext *cx, JSObject *wrapper, uintN argc, Value *vp);
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virtual bool construct(JSContext *cx, JSObject *wrapper, uintN argc, Value *argv, Value *rval);
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virtual bool hasInstance(JSContext *cx, JSObject *wrapper, const Value *vp, bool *bp);
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virtual JSType typeOf(JSContext *cx, JSObject *proxy);
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virtual JSString *obj_toString(JSContext *cx, JSObject *wrapper);
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virtual JSString *fun_toString(JSContext *cx, JSObject *wrapper, uintN indent);
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virtual bool defaultValue(JSContext *cx, JSObject *wrapper, JSType hint, Value *vp);
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virtual void trace(JSTracer *trc, JSObject *wrapper);
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/* Policy enforcement traps. */
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enum Action { GET, SET, CALL };
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virtual bool enter(JSContext *cx, JSObject *wrapper, jsid id, Action act, bool *bp);
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virtual void leave(JSContext *cx, JSObject *wrapper);
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static Wrapper singleton;
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static JSObject *New(JSContext *cx, JSObject *obj, JSObject *proto, JSObject *parent,
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Wrapper *handler);
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static JSObject *wrappedObject(const JSObject *wrapper);
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static Wrapper *wrapperHandler(const JSObject *wrapper);
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enum {
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CROSS_COMPARTMENT = 1 << 0,
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LAST_USED_FLAG = CROSS_COMPARTMENT
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};
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static void *getWrapperFamily();
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};
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/* Base class for all cross compartment wrapper handlers. */
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class JS_FRIEND_API(CrossCompartmentWrapper) : public Wrapper
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{
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public:
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CrossCompartmentWrapper(uintN flags);
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virtual ~CrossCompartmentWrapper();
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/* ES5 Harmony fundamental wrapper traps. */
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virtual bool getPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
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PropertyDescriptor *desc);
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virtual bool getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
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PropertyDescriptor *desc);
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virtual bool defineProperty(JSContext *cx, JSObject *wrapper, jsid id,
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PropertyDescriptor *desc);
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virtual bool getOwnPropertyNames(JSContext *cx, JSObject *wrapper, 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, AutoIdVector &props);
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/* ES5 Harmony derived wrapper traps. */
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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 get(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, Value *vp);
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virtual bool set(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, bool strict,
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Value *vp);
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virtual bool keys(JSContext *cx, JSObject *wrapper, AutoIdVector &props);
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virtual bool iterate(JSContext *cx, JSObject *wrapper, uintN flags, Value *vp);
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/* Spidermonkey extensions. */
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virtual bool call(JSContext *cx, JSObject *wrapper, uintN argc, Value *vp);
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virtual bool construct(JSContext *cx, JSObject *wrapper, uintN argc, Value *argv, Value *rval);
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virtual bool hasInstance(JSContext *cx, JSObject *wrapper, const Value *vp, bool *bp);
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virtual JSString *obj_toString(JSContext *cx, JSObject *wrapper);
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virtual JSString *fun_toString(JSContext *cx, JSObject *wrapper, uintN indent);
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virtual bool defaultValue(JSContext *cx, JSObject *wrapper, JSType hint, Value *vp);
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virtual void trace(JSTracer *trc, JSObject *wrapper);
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static CrossCompartmentWrapper singleton;
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};
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/*
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* A hacky class that lets a friend force a fake frame. We must already be
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* in the compartment of |target| when we enter the forced frame.
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*/
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class JS_FRIEND_API(ForceFrame)
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{
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public:
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JSContext * const context;
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JSObject * const target;
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private:
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DummyFrameGuard *frame;
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public:
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ForceFrame(JSContext *cx, JSObject *target);
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~ForceFrame();
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bool enter();
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};
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class AutoCompartment
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{
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public:
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JSContext * const context;
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JSCompartment * const origin;
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JSObject * const target;
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JSCompartment * const destination;
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private:
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Maybe<DummyFrameGuard> frame;
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bool entered;
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public:
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AutoCompartment(JSContext *cx, JSObject *target);
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~AutoCompartment();
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bool enter();
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void leave();
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private:
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// Prohibit copying.
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AutoCompartment(const AutoCompartment &);
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AutoCompartment & operator=(const AutoCompartment &);
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};
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/*
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* Use this to change the behavior of an AutoCompartment slightly on error. If
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* the exception happens to be an Error object, copy it to the origin compartment
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* instead of wrapping it.
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*/
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class ErrorCopier
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{
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AutoCompartment ∾
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JSObject *scope;
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public:
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ErrorCopier(AutoCompartment &ac, JSObject *scope) : ac(ac), scope(scope) {
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JS_ASSERT(scope->compartment() == ac.origin);
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}
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~ErrorCopier();
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};
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extern JSObject *
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TransparentObjectWrapper(JSContext *cx, JSObject *obj, JSObject *wrappedProto, JSObject *parent,
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uintN flags);
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}
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#endif
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