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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
/* 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/. */
#ifndef mozilla_dom_DOMJSProxyHandler_h
#define mozilla_dom_DOMJSProxyHandler_h
#include "jsapi.h"
#include "jsfriendapi.h"
#include "jsproxy.h"
#include "xpcpublic.h"
#include "nsString.h"
#include "mozilla/Likely.h"
#define DOM_PROXY_OBJECT_SLOT js::JSSLOT_PROXY_PRIVATE
namespace mozilla {
namespace dom {
enum {
JSPROXYSLOT_EXPANDO = 0
};
template<typename T> struct Prefable;
class DOMProxyHandler : public DOMBaseProxyHandler
{
public:
DOMProxyHandler(const DOMClass& aClass)
: DOMBaseProxyHandler(true),
mClass(aClass)
{
}
bool getPropertyDescriptor(JSContext* cx, JSObject* proxy, jsid id, bool set,
JSPropertyDescriptor* desc);
bool defineProperty(JSContext* cx, JSObject* proxy, jsid id,
JSPropertyDescriptor* desc);
bool delete_(JSContext* cx, JSObject* proxy, jsid id, bool* bp);
bool enumerate(JSContext* cx, JSObject* proxy, JS::AutoIdVector& props);
bool fix(JSContext* cx, JSObject* proxy, JS::Value* vp);
bool has(JSContext* cx, JSObject* proxy, jsid id, bool* bp);
using js::BaseProxyHandler::obj_toString;
static JSObject* GetExpandoObject(JSObject* obj)
{
MOZ_ASSERT(IsDOMProxy(obj), "expected a DOM proxy object");
JS::Value v = js::GetProxyExtra(obj, JSPROXYSLOT_EXPANDO);
return v.isUndefined() ? NULL : v.toObjectOrNull();
}
static JSObject* EnsureExpandoObject(JSContext* cx, JSObject* obj);
const DOMClass& mClass;
protected:
static JSString* obj_toString(JSContext* cx, const char* className);
};
extern jsid s_length_id;
int32_t IdToInt32(JSContext* cx, jsid id);
inline int32_t
GetArrayIndexFromId(JSContext* cx, jsid id)
{
if (MOZ_LIKELY(JSID_IS_INT(id))) {
return JSID_TO_INT(id);
}
if (MOZ_LIKELY(id == s_length_id)) {
return -1;
}
if (MOZ_LIKELY(JSID_IS_ATOM(id))) {
JSAtom* atom = JSID_TO_ATOM(id);
jschar s = *js::GetAtomChars(atom);
if (MOZ_LIKELY((unsigned)s >= 'a' && (unsigned)s <= 'z'))
return -1;
uint32_t i;
JSLinearString* str = js::AtomToLinearString(JSID_TO_ATOM(id));
return js::StringIsArrayIndex(str, &i) ? i : -1;
}
return IdToInt32(cx, id);
}
inline void
FillPropertyDescriptor(JSPropertyDescriptor* desc, JSObject* obj, bool readonly)
{
desc->obj = obj;
desc->attrs = (readonly ? JSPROP_READONLY : 0) | JSPROP_ENUMERATE;
desc->getter = NULL;
desc->setter = NULL;
desc->shortid = 0;
}
inline void
FillPropertyDescriptor(JSPropertyDescriptor* desc, JSObject* obj, jsval v, bool readonly)
{
desc->value = v;
FillPropertyDescriptor(desc, obj, readonly);
}
JSObject*
EnsureExpandoObject(JSContext* cx, JSObject* obj);
} // namespace dom
} // namespace mozilla
#endif /* mozilla_dom_DOMProxyHandler_h */
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