js/src/jsproxy.h

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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
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  13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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  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) 2009
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  25  * Contributor(s):
  26  *   Andreas Gal <gal@mozilla.com>
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  40  * ***** END LICENSE BLOCK ***** */
  41
  42 #ifndef jsproxy_h___
  43 #define jsproxy_h___
  44
  45 #include "jsapi.h"
  46 #include "jscntxt.h"
  47 #include "jsobj.h"
  48
  49 namespace js {
  50
  51 /* Base class for all C++ proxy handlers. */
  52 class JS_FRIEND_API(JSProxyHandler) {
  53     void *mFamily;
  54   public:
  55     explicit JSProxyHandler(void *family);
  56     virtual ~JSProxyHandler();
  57
  58     /* ES5 Harmony fundamental proxy traps. */
  59     virtual bool getPropertyDescriptor(JSContext *cx, JSObject *proxy, jsid id, bool set,
  60                                        PropertyDescriptor *desc) = 0;
  61     virtual bool getOwnPropertyDescriptor(JSContext *cx, JSObject *proxy, jsid id, bool set,
  62                                           PropertyDescriptor *desc) = 0;
  63     virtual bool defineProperty(JSContext *cx, JSObject *proxy, jsid id,
  64                                 PropertyDescriptor *desc) = 0;
  65     virtual bool getOwnPropertyNames(JSContext *cx, JSObject *proxy, js::AutoIdVector &props) = 0;
  66     virtual bool delete_(JSContext *cx, JSObject *proxy, jsid id, bool *bp) = 0;
  67     virtual bool enumerate(JSContext *cx, JSObject *proxy, js::AutoIdVector &props) = 0;
  68     virtual bool fix(JSContext *cx, JSObject *proxy, Value *vp) = 0;
  69
  70     /* ES5 Harmony derived proxy traps. */
  71     virtual bool has(JSContext *cx, JSObject *proxy, jsid id, bool *bp);
  72     virtual bool hasOwn(JSContext *cx, JSObject *proxy, jsid id, bool *bp);
  73     virtual bool get(JSContext *cx, JSObject *proxy, JSObject *receiver, jsid id, js::Value *vp);
  74     virtual bool set(JSContext *cx, JSObject *proxy, JSObject *receiver, jsid id, bool strict,
  75                      js::Value *vp);
  76     virtual bool keys(JSContext *cx, JSObject *proxy, js::AutoIdVector &props);
  77     virtual bool iterate(JSContext *cx, JSObject *proxy, uintN flags, js::Value *vp);
  78
  79     /* Spidermonkey extensions. */
  80     virtual bool call(JSContext *cx, JSObject *proxy, uintN argc, js::Value *vp);
  81     virtual bool construct(JSContext *cx, JSObject *proxy,
  82                                           uintN argc, js::Value *argv, js::Value *rval);
  83     virtual bool hasInstance(JSContext *cx, JSObject *proxy, const js::Value *vp, bool *bp);
  84     virtual JSType typeOf(JSContext *cx, JSObject *proxy);
  85     virtual JSString *obj_toString(JSContext *cx, JSObject *proxy);
  86     virtual JSString *fun_toString(JSContext *cx, JSObject *proxy, uintN indent);
  87     virtual void finalize(JSContext *cx, JSObject *proxy);
  88     virtual void trace(JSTracer *trc, JSObject *proxy);
  89
  90     virtual bool isOuterWindow() {
  91         return false;
  92     }
  93
  94     inline void *family() {
  95         return mFamily;
  96     }
  97 };
  98
  99 /* Dispatch point for handlers that executes the appropriate C++ or scripted traps. */
 100 class JSProxy {
 101   public:
 102     /* ES5 Harmony fundamental proxy traps. */
 103     static bool getPropertyDescriptor(JSContext *cx, JSObject *proxy, jsid id, bool set,
 104                                       PropertyDescriptor *desc);
 105     static bool getPropertyDescriptor(JSContext *cx, JSObject *proxy, jsid id, bool set, Value *vp);
 106     static bool getOwnPropertyDescriptor(JSContext *cx, JSObject *proxy, jsid id, bool set,
 107                                          PropertyDescriptor *desc);
 108     static bool getOwnPropertyDescriptor(JSContext *cx, JSObject *proxy, jsid id, bool set,
 109                                          Value *vp);
 110     static bool defineProperty(JSContext *cx, JSObject *proxy, jsid id, PropertyDescriptor *desc);
 111     static bool defineProperty(JSContext *cx, JSObject *proxy, jsid id, const Value &v);
 112     static bool getOwnPropertyNames(JSContext *cx, JSObject *proxy, js::AutoIdVector &props);
 113     static bool delete_(JSContext *cx, JSObject *proxy, jsid id, bool *bp);
 114     static bool enumerate(JSContext *cx, JSObject *proxy, js::AutoIdVector &props);
 115     static bool fix(JSContext *cx, JSObject *proxy, Value *vp);
 116
 117     /* ES5 Harmony derived proxy traps. */
 118     static bool has(JSContext *cx, JSObject *proxy, jsid id, bool *bp);
 119     static bool hasOwn(JSContext *cx, JSObject *proxy, jsid id, bool *bp);
 120     static bool get(JSContext *cx, JSObject *proxy, JSObject *receiver, jsid id, Value *vp);
 121     static bool set(JSContext *cx, JSObject *proxy, JSObject *receiver, jsid id, bool strict,
 122                     Value *vp);
 123     static bool keys(JSContext *cx, JSObject *proxy, js::AutoIdVector &props);
 124     static bool iterate(JSContext *cx, JSObject *proxy, uintN flags, Value *vp);
 125
 126     /* Spidermonkey extensions. */
 127     static bool call(JSContext *cx, JSObject *proxy, uintN argc, js::Value *vp);
 128     static bool construct(JSContext *cx, JSObject *proxy, uintN argc, js::Value *argv, js::Value *rval);
 129     static bool hasInstance(JSContext *cx, JSObject *proxy, const js::Value *vp, bool *bp);
 130     static JSType typeOf(JSContext *cx, JSObject *proxy);
 131     static JSString *obj_toString(JSContext *cx, JSObject *proxy);
 132     static JSString *fun_toString(JSContext *cx, JSObject *proxy, uintN indent);
 133 };
 134
 135 /* Shared between object and function proxies. */
 136 const uint32 JSSLOT_PROXY_HANDLER = 0;
 137 const uint32 JSSLOT_PROXY_PRIVATE = 1;
 138 const uint32 JSSLOT_PROXY_EXTRA   = 2;
 139 /* Function proxies only. */
 140 const uint32 JSSLOT_PROXY_CALL = 3;
 141 const uint32 JSSLOT_PROXY_CONSTRUCT = 4;
 142
 143 extern JS_FRIEND_API(js::Class) ObjectProxyClass;
 144 extern JS_FRIEND_API(js::Class) FunctionProxyClass;
 145 extern JS_FRIEND_API(js::Class) OuterWindowProxyClass;
 146 extern js::Class CallableObjectClass;
 147
 148 }
 149
 150 inline bool
 151 JSObject::isObjectProxy() const
 152 {
 153     return getClass() == &js::ObjectProxyClass ||
 154            getClass() == &js::OuterWindowProxyClass;
 155 }
 156
 157 inline bool
 158 JSObject::isFunctionProxy() const
 159 {
 160     return getClass() == &js::FunctionProxyClass;
 161 }
 162
 163 inline bool
 164 JSObject::isProxy() const
 165 {
 166     return isObjectProxy() || isFunctionProxy();
 167 }
 168
 169 inline js::JSProxyHandler *
 170 JSObject::getProxyHandler() const
 171 {
 172     JS_ASSERT(isProxy());
 173     return (js::JSProxyHandler *) getSlot(js::JSSLOT_PROXY_HANDLER).toPrivate();
 174 }
 175
 176 inline const js::Value &
 177 JSObject::getProxyPrivate() const
 178 {
 179     JS_ASSERT(isProxy());
 180     return getSlot(js::JSSLOT_PROXY_PRIVATE);
 181 }
 182
 183 inline void
 184 JSObject::setProxyPrivate(const js::Value &priv)
 185 {
 186     JS_ASSERT(isProxy());
 187     setSlot(js::JSSLOT_PROXY_PRIVATE, priv);
 188 }
 189
 190 inline const js::Value &
 191 JSObject::getProxyExtra() const
 192 {
 193     JS_ASSERT(isProxy());
 194     return getSlot(js::JSSLOT_PROXY_EXTRA);
 195 }
 196
 197 inline void
 198 JSObject::setProxyExtra(const js::Value &extra)
 199 {
 200     JS_ASSERT(isProxy());
 201     setSlot(js::JSSLOT_PROXY_EXTRA, extra);
 202 }
 203
 204 namespace js {
 205
 206 JS_FRIEND_API(JSObject *)
 207 NewProxyObject(JSContext *cx, JSProxyHandler *handler, const js::Value &priv,
 208                JSObject *proto, JSObject *parent,
 209                JSObject *call = NULL, JSObject *construct = NULL);
 210
 211 JS_FRIEND_API(JSBool)
 212 FixProxy(JSContext *cx, JSObject *proxy, JSBool *bp);
 213
 214 }
 215
 216 JS_BEGIN_EXTERN_C
 217
 218 extern js::Class js_ProxyClass;
 219
 220 extern JS_FRIEND_API(JSObject *)
 221 js_InitProxyClass(JSContext *cx, JSObject *obj);
 222
 223 JS_END_EXTERN_C
 224
 225 #endif