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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=2 sw=2 et tw=99 ft=cpp: */
/* 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/. */
#include "mozilla/Util.h"
#include "DOMJSProxyHandler.h"
#include "xpcpublic.h"
#include "xpcprivate.h"
#include "XPCQuickStubs.h"
#include "XPCWrapper.h"
#include "WrapperFactory.h"
#include "nsDOMClassInfo.h"
#include "nsGlobalWindow.h"
#include "nsWrapperCacheInlines.h"
#include "mozilla/dom/BindingUtils.h"
#include "jsapi.h"
using namespace JS;
namespace mozilla {
namespace dom {
jsid s_length_id = JSID_VOID;
bool
DefineStaticJSVals(JSContext* cx)
{
JSAutoRequest ar(cx);
return InternJSString(cx, s_length_id, "length");
}
int HandlerFamily;
// Store the information for the specialized ICs.
struct SetListBaseInformation
{
SetListBaseInformation() {
js::SetListBaseInformation((void*) &HandlerFamily, js::JSSLOT_PROXY_EXTRA + JSPROXYSLOT_EXPANDO);
}
};
SetListBaseInformation gSetListBaseInformation;
bool
DefineConstructor(JSContext* cx, JSObject* obj, DefineInterface aDefine, nsresult* aResult)
{
bool enabled;
bool defined = aDefine(cx, obj, &enabled);
MOZ_ASSERT(!defined || enabled,
"We defined a constructor but the new bindings are disabled?");
*aResult = defined ? NS_OK : NS_ERROR_FAILURE;
return enabled;
}
// static
JSObject*
DOMProxyHandler::EnsureExpandoObject(JSContext* cx, JSObject* obj)
{
NS_ASSERTION(IsDOMProxy(obj), "expected a DOM proxy object");
JSObject* expando = GetExpandoObject(obj);
if (!expando) {
expando = JS_NewObjectWithGivenProto(cx, nullptr, nullptr,
js::GetObjectParent(obj));
if (!expando) {
return NULL;
}
xpc::CompartmentPrivate* priv = xpc::GetCompartmentPrivate(obj);
if (!priv->RegisterDOMExpandoObject(obj)) {
return NULL;
}
nsWrapperCache* cache;
CallQueryInterface(UnwrapDOMObject<nsISupports>(obj, eProxyDOMObject), &cache);
cache->SetPreservingWrapper(true);
js::SetProxyExtra(obj, JSPROXYSLOT_EXPANDO, ObjectValue(*expando));
}
return expando;
}
bool
DOMProxyHandler::getPropertyDescriptor(JSContext* cx, JSObject* proxy, jsid id, bool set,
JSPropertyDescriptor* desc)
{
if (!getOwnPropertyDescriptor(cx, proxy, id, set, desc)) {
return false;
}
if (desc->obj) {
return true;
}
JSObject* proto;
if (!js::GetObjectProto(cx, proxy, &proto)) {
return false;
}
if (!proto) {
desc->obj = NULL;
return true;
}
return JS_GetPropertyDescriptorById(cx, proto, id, JSRESOLVE_QUALIFIED, desc);
}
bool
DOMProxyHandler::defineProperty(JSContext* cx, JSObject* proxy, jsid id,
JSPropertyDescriptor* desc)
{
if ((desc->attrs & JSPROP_GETTER) && desc->setter == JS_StrictPropertyStub) {
return JS_ReportErrorFlagsAndNumber(cx,
JSREPORT_WARNING | JSREPORT_STRICT |
JSREPORT_STRICT_MODE_ERROR,
js_GetErrorMessage, NULL,
JSMSG_GETTER_ONLY);
}
if (xpc::WrapperFactory::IsXrayWrapper(proxy)) {
return true;
}
JSObject* expando = EnsureExpandoObject(cx, proxy);
if (!expando) {
return false;
}
return JS_DefinePropertyById(cx, expando, id, desc->value, desc->getter, desc->setter,
desc->attrs);
}
bool
DOMProxyHandler::delete_(JSContext* cx, JSObject* proxy, jsid id, bool* bp)
{
JSBool b = true;
JSObject* expando;
if (!xpc::WrapperFactory::IsXrayWrapper(proxy) && (expando = GetExpandoObject(proxy))) {
Value v;
if (!JS_DeletePropertyById2(cx, expando, id, &v) || !JS_ValueToBoolean(cx, v, &b)) {
return false;
}
}
*bp = !!b;
return true;
}
bool
DOMProxyHandler::enumerate(JSContext* cx, JSObject* proxy, AutoIdVector& props)
{
JSObject* proto;
if (!JS_GetPrototype(cx, proxy, &proto)) {
return false;
}
return getOwnPropertyNames(cx, proxy, props) &&
(!proto || js::GetPropertyNames(cx, proto, 0, &props));
}
bool
DOMProxyHandler::fix(JSContext* cx, JSObject* proxy, Value* vp)
{
vp->setUndefined();
return true;
}
bool
DOMProxyHandler::has(JSContext* cx, JSObject* proxy, jsid id, bool* bp)
{
if (!hasOwn(cx, proxy, id, bp)) {
return false;
}
if (*bp) {
// We have the property ourselves; no need to worry about our prototype
// chain.
return true;
}
// OK, now we have to look at the proto
JSObject *proto;
if (!js::GetObjectProto(cx, proxy, &proto)) {
return false;
}
if (!proto) {
return true;
}
JSBool protoHasProp;
bool ok = JS_HasPropertyById(cx, proto, id, &protoHasProp);
if (ok) {
*bp = protoHasProp;
}
return ok;
}
// static
JSString*
DOMProxyHandler::obj_toString(JSContext* cx, const char* className)
{
size_t nchars = sizeof("[object ]") - 1 + strlen(className);
jschar* chars = static_cast<jschar*>(JS_malloc(cx, (nchars + 1) * sizeof(jschar)));
if (!chars) {
return NULL;
}
const char* prefix = "[object ";
nchars = 0;
while ((chars[nchars] = (jschar)*prefix) != 0) {
nchars++, prefix++;
}
while ((chars[nchars] = (jschar)*className) != 0) {
nchars++, className++;
}
chars[nchars++] = ']';
chars[nchars] = 0;
JSString* str = JS_NewUCString(cx, chars, nchars);
if (!str) {
JS_free(cx, chars);
}
return str;
}
int32_t
IdToInt32(JSContext* cx, jsid id)
{
JSAutoRequest ar(cx);
jsval idval;
double array_index;
int32_t i;
if (!::JS_IdToValue(cx, id, &idval) ||
!::JS_ValueToNumber(cx, idval, &array_index) ||
!::JS_DoubleIsInt32(array_index, &i)) {
return -1;
}
return i;
}
} // namespace dom
} // namespace mozilla
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