js/src/jswrapper.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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   5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   6  *
   7  * The contents of this file are subject to the Mozilla Public License Version
   8  * 1.1 (the "License"); you may not use this file except in compliance with
   9  * the License. You may obtain a copy of the License at
  10  * http://www.mozilla.org/MPL/
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  12  * Software distributed under the License is distributed on an "AS IS" basis,
  13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  14  * for the specific language governing rights and limitations under the
  15  * License.
  16  *
  17  * The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
  18  * May 28, 2008.
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  20  * The Initial Developer of the Original Code is
  21  *   Mozilla Foundation
  22  * Portions created by the Initial Developer are Copyright (C) 2010
  23  * the Initial Developer. All Rights Reserved.
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  25  * Contributor(s):
  26  *   Andreas Gal <gal@mozilla.com>
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  28  * Alternatively, the contents of this file may be used under the terms of
  29  * either of the GNU General Public License Version 2 or later (the "GPL"),
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  40  * ***** END LICENSE BLOCK ***** */
  41
  42 #ifndef jswrapper_h___
  43 #define jswrapper_h___
  44
  45 #include "jsapi.h"
  46 #include "jsproxy.h"
  47
  48 JS_BEGIN_EXTERN_C
  49
  50 /* No-op wrapper handler base class. */
  51 class JS_FRIEND_API(JSWrapper) : public js::JSProxyHandler {
  52     uintN mFlags;
  53   public:
  54     uintN flags() const { return mFlags; }
  55
  56     explicit JSWrapper(uintN flags);
  57
  58     typedef enum { PermitObjectAccess, PermitPropertyAccess, DenyAccess } Permission;
  59
  60     virtual ~JSWrapper();
  61
  62     /* ES5 Harmony fundamental wrapper traps. */
  63     virtual bool getPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
  64                                        js::PropertyDescriptor *desc);
  65     virtual bool getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
  66                                           js::PropertyDescriptor *desc);
  67     virtual bool defineProperty(JSContext *cx, JSObject *wrapper, jsid id,
  68                                 js::PropertyDescriptor *desc);
  69     virtual bool getOwnPropertyNames(JSContext *cx, JSObject *wrapper, js::AutoIdVector &props);
  70     virtual bool delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
  71     virtual bool enumerate(JSContext *cx, JSObject *wrapper, js::AutoIdVector &props);
  72     virtual bool fix(JSContext *cx, JSObject *wrapper, js::Value *vp);
  73
  74     /* ES5 Harmony derived wrapper traps. */
  75     virtual bool has(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
  76     virtual bool hasOwn(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
  77     virtual bool get(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, js::Value *vp);
  78     virtual bool set(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, bool strict,
  79                      js::Value *vp);
  80     virtual bool keys(JSContext *cx, JSObject *wrapper, js::AutoIdVector &props);
  81     virtual bool iterate(JSContext *cx, JSObject *wrapper, uintN flags, js::Value *vp);
  82
  83     /* Spidermonkey extensions. */
  84     virtual bool call(JSContext *cx, JSObject *wrapper, uintN argc, js::Value *vp);
  85     virtual bool construct(JSContext *cx, JSObject *wrapper, uintN argc, js::Value *argv,
  86                            js::Value *rval);
  87     virtual bool hasInstance(JSContext *cx, JSObject *wrapper, const js::Value *vp, bool *bp);
  88     virtual JSType typeOf(JSContext *cx, JSObject *proxy);
  89     virtual JSString *obj_toString(JSContext *cx, JSObject *wrapper);
  90     virtual JSString *fun_toString(JSContext *cx, JSObject *wrapper, uintN indent);
  91
  92     virtual void trace(JSTracer *trc, JSObject *wrapper);
  93
  94     /* Policy enforcement traps. */
  95     enum Action { GET, SET, CALL };
  96     virtual bool enter(JSContext *cx, JSObject *wrapper, jsid id, Action act, bool *bp);
  97     virtual void leave(JSContext *cx, JSObject *wrapper);
  98
  99     static JSWrapper singleton;
 100
 101     static JSObject *New(JSContext *cx, JSObject *obj, JSObject *proto, JSObject *parent,
 102                          JSWrapper *handler);
 103
 104     static inline JSObject *wrappedObject(const JSObject *wrapper) {
 105         return wrapper->getProxyPrivate().toObjectOrNull();
 106     }
 107     static inline JSWrapper *wrapperHandler(const JSObject *wrapper) {
 108         return static_cast<JSWrapper *>(wrapper->getProxyHandler());
 109     }
 110
 111     enum {
 112         CROSS_COMPARTMENT = 1 << 0,
 113         LAST_USED_FLAG = CROSS_COMPARTMENT
 114     };
 115
 116     static void *getWrapperFamily();
 117 };
 118
 119 /* Base class for all cross compartment wrapper handlers. */
 120 class JS_FRIEND_API(JSCrossCompartmentWrapper) : public JSWrapper {
 121   public:
 122     JSCrossCompartmentWrapper(uintN flags);
 123
 124     virtual ~JSCrossCompartmentWrapper();
 125
 126     /* ES5 Harmony fundamental wrapper traps. */
 127     virtual bool getPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
 128                                        js::PropertyDescriptor *desc);
 129     virtual bool getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
 130                                           js::PropertyDescriptor *desc);
 131     virtual bool defineProperty(JSContext *cx, JSObject *wrapper, jsid id,
 132                                 js::PropertyDescriptor *desc);
 133     virtual bool getOwnPropertyNames(JSContext *cx, JSObject *wrapper, js::AutoIdVector &props);
 134     virtual bool delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
 135     virtual bool enumerate(JSContext *cx, JSObject *wrapper, js::AutoIdVector &props);
 136
 137     /* ES5 Harmony derived wrapper traps. */
 138     virtual bool has(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
 139     virtual bool hasOwn(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
 140     virtual bool get(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, js::Value *vp);
 141     virtual bool set(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, bool strict,
 142                      js::Value *vp);
 143     virtual bool keys(JSContext *cx, JSObject *wrapper, js::AutoIdVector &props);
 144     virtual bool iterate(JSContext *cx, JSObject *wrapper, uintN flags, js::Value *vp);
 145
 146     /* Spidermonkey extensions. */
 147     virtual bool call(JSContext *cx, JSObject *wrapper, uintN argc, js::Value *vp);
 148     virtual bool construct(JSContext *cx, JSObject *wrapper,
 149                            uintN argc, js::Value *argv, js::Value *rval);
 150     virtual bool hasInstance(JSContext *cx, JSObject *wrapper, const js::Value *vp, bool *bp);
 151     virtual JSString *obj_toString(JSContext *cx, JSObject *wrapper);
 152     virtual JSString *fun_toString(JSContext *cx, JSObject *wrapper, uintN indent);
 153
 154     static JSCrossCompartmentWrapper singleton;
 155 };
 156
 157 namespace js {
 158
 159 class AutoCompartment
 160 {
 161   public:
 162     JSContext * const context;
 163     JSCompartment * const origin;
 164     JSObject * const target;
 165     JSCompartment * const destination;
 166   private:
 167     LazilyConstructed<DummyFrameGuard> frame;
 168     JSFrameRegs regs;
 169     AutoStringRooter input;
 170     bool entered;
 171
 172   public:
 173     AutoCompartment(JSContext *cx, JSObject *target);
 174     ~AutoCompartment();
 175
 176     bool enter();
 177     void leave();
 178
 179   private:
 180     // Prohibit copying.
 181     AutoCompartment(const AutoCompartment &);
 182     AutoCompartment & operator=(const AutoCompartment &);
 183 };
 184
 185 extern JSObject *
 186 TransparentObjectWrapper(JSContext *cx, JSObject *obj, JSObject *wrappedProto, JSObject *parent,
 187                          uintN flags);
 188
 189 }
 190
 191 JS_END_EXTERN_C
 192
 193 #endif