mirror of
https://github.com/mozilla/gecko-dev.git
synced 2025-11-11 13:48:23 +02:00
c4745d28b1
CLOSED TREE Backed out changeset 7613fc978d36 (bug 1142794) Backed out changeset e5f0cb31263d (bug 1142784) Backed out changeset dcd0af73ac84 (bug 1142784) Backed out changeset 034f9c8e79ee (bug 1142784) Backed out changeset ce0ee37e3ca9 (bug 1142775) Backed out changeset 1519b8f2bbba (bug 1142761) Backed out changeset 26fd55677841 (bug 1139683) Backed out changeset 7ebc76a450c3 (bug 1144819) Backed out changeset 92adb459d519 (bug 1143810)
380 lines
10 KiB
C++
380 lines
10 KiB
C++
/* -*- 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/dom/DOMJSProxyHandler.h"
|
|
#include "xpcpublic.h"
|
|
#include "xpcprivate.h"
|
|
#include "XPCWrapper.h"
|
|
#include "WrapperFactory.h"
|
|
#include "nsDOMClassInfo.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)
|
|
{
|
|
return InternJSString(cx, s_length_id, "length");
|
|
}
|
|
|
|
const char DOMProxyHandler::family = 0;
|
|
|
|
js::DOMProxyShadowsResult
|
|
DOMProxyShadows(JSContext* cx, JS::Handle<JSObject*> proxy, JS::Handle<jsid> id)
|
|
{
|
|
JS::Rooted<JSObject*> expando(cx, DOMProxyHandler::GetExpandoObject(proxy));
|
|
JS::Value v = js::GetProxyExtra(proxy, JSPROXYSLOT_EXPANDO);
|
|
bool isOverrideBuiltins = !v.isObject() && !v.isUndefined();
|
|
if (expando) {
|
|
bool hasOwn;
|
|
if (!JS_AlreadyHasOwnPropertyById(cx, expando, id, &hasOwn))
|
|
return js::ShadowCheckFailed;
|
|
|
|
if (hasOwn) {
|
|
return isOverrideBuiltins ?
|
|
js::ShadowsViaIndirectExpando : js::ShadowsViaDirectExpando;
|
|
}
|
|
}
|
|
|
|
if (!isOverrideBuiltins) {
|
|
// Our expando, if any, didn't shadow, so we're not shadowing at all.
|
|
return js::DoesntShadow;
|
|
}
|
|
|
|
bool hasOwn;
|
|
if (!GetProxyHandler(proxy)->hasOwn(cx, proxy, id, &hasOwn))
|
|
return js::ShadowCheckFailed;
|
|
|
|
return hasOwn ? js::Shadows : js::DoesntShadowUnique;
|
|
}
|
|
|
|
// Store the information for the specialized ICs.
|
|
struct SetDOMProxyInformation
|
|
{
|
|
SetDOMProxyInformation() {
|
|
js::SetDOMProxyInformation((const void*) &DOMProxyHandler::family,
|
|
JSPROXYSLOT_EXPANDO, DOMProxyShadows);
|
|
}
|
|
};
|
|
|
|
SetDOMProxyInformation gSetDOMProxyInformation;
|
|
|
|
// static
|
|
JSObject*
|
|
DOMProxyHandler::GetAndClearExpandoObject(JSObject* obj)
|
|
{
|
|
MOZ_ASSERT(IsDOMProxy(obj), "expected a DOM proxy object");
|
|
JS::Value v = js::GetProxyExtra(obj, JSPROXYSLOT_EXPANDO);
|
|
if (v.isUndefined()) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (v.isObject()) {
|
|
js::SetProxyExtra(obj, JSPROXYSLOT_EXPANDO, UndefinedValue());
|
|
xpc::ObjectScope(obj)->RemoveDOMExpandoObject(obj);
|
|
} else {
|
|
js::ExpandoAndGeneration* expandoAndGeneration =
|
|
static_cast<js::ExpandoAndGeneration*>(v.toPrivate());
|
|
v = expandoAndGeneration->expando;
|
|
if (v.isUndefined()) {
|
|
return nullptr;
|
|
}
|
|
expandoAndGeneration->expando = UndefinedValue();
|
|
}
|
|
|
|
|
|
return &v.toObject();
|
|
}
|
|
|
|
// static
|
|
JSObject*
|
|
DOMProxyHandler::EnsureExpandoObject(JSContext* cx, JS::Handle<JSObject*> obj)
|
|
{
|
|
NS_ASSERTION(IsDOMProxy(obj), "expected a DOM proxy object");
|
|
JS::Value v = js::GetProxyExtra(obj, JSPROXYSLOT_EXPANDO);
|
|
if (v.isObject()) {
|
|
return &v.toObject();
|
|
}
|
|
|
|
js::ExpandoAndGeneration* expandoAndGeneration;
|
|
if (!v.isUndefined()) {
|
|
expandoAndGeneration = static_cast<js::ExpandoAndGeneration*>(v.toPrivate());
|
|
if (expandoAndGeneration->expando.isObject()) {
|
|
return &expandoAndGeneration->expando.toObject();
|
|
}
|
|
} else {
|
|
expandoAndGeneration = nullptr;
|
|
}
|
|
|
|
JS::Rooted<JSObject*> expando(cx,
|
|
JS_NewObjectWithGivenProto(cx, nullptr, JS::NullPtr()));
|
|
if (!expando) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsISupports* native = UnwrapDOMObject<nsISupports>(obj);
|
|
nsWrapperCache* cache;
|
|
CallQueryInterface(native, &cache);
|
|
if (expandoAndGeneration) {
|
|
cache->PreserveWrapper(native);
|
|
expandoAndGeneration->expando.setObject(*expando);
|
|
|
|
return expando;
|
|
}
|
|
|
|
if (!xpc::ObjectScope(obj)->RegisterDOMExpandoObject(obj)) {
|
|
return nullptr;
|
|
}
|
|
|
|
cache->SetPreservingWrapper(true);
|
|
js::SetProxyExtra(obj, JSPROXYSLOT_EXPANDO, ObjectValue(*expando));
|
|
|
|
return expando;
|
|
}
|
|
|
|
bool
|
|
DOMProxyHandler::preventExtensions(JSContext* cx, JS::Handle<JSObject*> proxy,
|
|
JS::ObjectOpResult& result) const
|
|
{
|
|
// always extensible per WebIDL
|
|
return result.failCantPreventExtensions();
|
|
}
|
|
|
|
bool
|
|
DOMProxyHandler::isExtensible(JSContext *cx, JS::Handle<JSObject*> proxy, bool *extensible) const
|
|
{
|
|
*extensible = true;
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
BaseDOMProxyHandler::getPropertyDescriptor(JSContext* cx,
|
|
JS::Handle<JSObject*> proxy,
|
|
JS::Handle<jsid> id,
|
|
MutableHandle<JSPropertyDescriptor> desc) const
|
|
{
|
|
if (!getOwnPropertyDescriptor(cx, proxy, id, desc)) {
|
|
return false;
|
|
}
|
|
if (desc.object()) {
|
|
return true;
|
|
}
|
|
|
|
JS::Rooted<JSObject*> proto(cx);
|
|
if (!js::GetObjectProto(cx, proxy, &proto)) {
|
|
return false;
|
|
}
|
|
if (!proto) {
|
|
desc.object().set(nullptr);
|
|
return true;
|
|
}
|
|
|
|
return JS_GetPropertyDescriptorById(cx, proto, id, desc);
|
|
}
|
|
|
|
bool
|
|
BaseDOMProxyHandler::getOwnPropertyDescriptor(JSContext* cx,
|
|
JS::Handle<JSObject*> proxy,
|
|
JS::Handle<jsid> id,
|
|
MutableHandle<JSPropertyDescriptor> desc) const
|
|
{
|
|
return getOwnPropDescriptor(cx, proxy, id, /* ignoreNamedProps = */ false,
|
|
desc);
|
|
}
|
|
|
|
bool
|
|
DOMProxyHandler::defineProperty(JSContext* cx, JS::Handle<JSObject*> proxy, JS::Handle<jsid> id,
|
|
MutableHandle<JSPropertyDescriptor> desc,
|
|
JS::ObjectOpResult &result, bool *defined) const
|
|
{
|
|
if (desc.hasGetterObject() && desc.setter() == JS_StrictPropertyStub) {
|
|
return result.failGetterOnly();
|
|
}
|
|
|
|
if (xpc::WrapperFactory::IsXrayWrapper(proxy)) {
|
|
return result.succeed();
|
|
}
|
|
|
|
JSObject* expando = EnsureExpandoObject(cx, proxy);
|
|
if (!expando) {
|
|
return false;
|
|
}
|
|
|
|
if (!js::DefineOwnProperty(cx, expando, id, desc, result)) {
|
|
return false;
|
|
}
|
|
*defined = true;
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
DOMProxyHandler::set(JSContext *cx, Handle<JSObject*> proxy, Handle<JSObject*> receiver,
|
|
Handle<jsid> id, MutableHandle<JS::Value> vp, ObjectOpResult &result) const
|
|
{
|
|
MOZ_ASSERT(!xpc::WrapperFactory::IsXrayWrapper(proxy),
|
|
"Should not have a XrayWrapper here");
|
|
bool done;
|
|
if (!setCustom(cx, proxy, id, vp, &done)) {
|
|
return false;
|
|
}
|
|
if (done) {
|
|
return result.succeed();
|
|
}
|
|
|
|
// Make sure to ignore our named properties when checking for own
|
|
// property descriptors for a set.
|
|
JS::Rooted<JSPropertyDescriptor> desc(cx);
|
|
if (!getOwnPropDescriptor(cx, proxy, id, /* ignoreNamedProps = */ true,
|
|
&desc)) {
|
|
return false;
|
|
}
|
|
if (!desc.object()) {
|
|
// Don't just use getPropertyDescriptor, unlike BaseProxyHandler::set,
|
|
// because that would call getOwnPropertyDescriptor on ourselves. Instead,
|
|
// directly delegate to the proto, if any.
|
|
JS::Rooted<JSObject*> proto(cx);
|
|
if (!js::GetObjectProto(cx, proxy, &proto)) {
|
|
return false;
|
|
}
|
|
if (proto && !JS_GetPropertyDescriptorById(cx, proto, id, &desc)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return js::SetPropertyIgnoringNamedGetter(cx, proxy, id, vp, receiver, &desc, result);
|
|
}
|
|
|
|
bool
|
|
DOMProxyHandler::delete_(JSContext* cx, JS::Handle<JSObject*> proxy,
|
|
JS::Handle<jsid> id, JS::ObjectOpResult &result) const
|
|
{
|
|
JS::Rooted<JSObject*> expando(cx);
|
|
if (!xpc::WrapperFactory::IsXrayWrapper(proxy) && (expando = GetExpandoObject(proxy))) {
|
|
return JS_DeletePropertyById(cx, expando, id, result);
|
|
}
|
|
|
|
return result.succeed();
|
|
}
|
|
|
|
bool
|
|
BaseDOMProxyHandler::watch(JSContext* cx, JS::Handle<JSObject*> proxy, JS::Handle<jsid> id,
|
|
JS::Handle<JSObject*> callable) const
|
|
{
|
|
return js::WatchGuts(cx, proxy, id, callable);
|
|
}
|
|
|
|
bool
|
|
BaseDOMProxyHandler::unwatch(JSContext* cx, JS::Handle<JSObject*> proxy, JS::Handle<jsid> id) const
|
|
{
|
|
return js::UnwatchGuts(cx, proxy, id);
|
|
}
|
|
|
|
bool
|
|
BaseDOMProxyHandler::ownPropertyKeys(JSContext* cx,
|
|
JS::Handle<JSObject*> proxy,
|
|
JS::AutoIdVector& props) const
|
|
{
|
|
return ownPropNames(cx, proxy, JSITER_OWNONLY | JSITER_HIDDEN | JSITER_SYMBOLS, props);
|
|
}
|
|
|
|
bool
|
|
BaseDOMProxyHandler::getOwnEnumerablePropertyKeys(JSContext* cx,
|
|
JS::Handle<JSObject*> proxy,
|
|
JS::AutoIdVector& props) const
|
|
{
|
|
return ownPropNames(cx, proxy, JSITER_OWNONLY, props);
|
|
}
|
|
|
|
bool
|
|
BaseDOMProxyHandler::enumerate(JSContext *cx, JS::Handle<JSObject*> proxy,
|
|
JS::MutableHandle<JSObject*> objp) const
|
|
{
|
|
return BaseProxyHandler::enumerate(cx, proxy, objp);
|
|
}
|
|
|
|
bool
|
|
DOMProxyHandler::has(JSContext* cx, JS::Handle<JSObject*> proxy, JS::Handle<jsid> id, bool* bp) const
|
|
{
|
|
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
|
|
JS::Rooted<JSObject*> proto(cx);
|
|
if (!js::GetObjectProto(cx, proxy, &proto)) {
|
|
return false;
|
|
}
|
|
if (!proto) {
|
|
return true;
|
|
}
|
|
bool protoHasProp;
|
|
bool ok = JS_HasPropertyById(cx, proto, id, &protoHasProp);
|
|
if (ok) {
|
|
*bp = protoHasProp;
|
|
}
|
|
return ok;
|
|
}
|
|
|
|
int32_t
|
|
IdToInt32(JSContext* cx, JS::Handle<jsid> id)
|
|
{
|
|
JS::Rooted<JS::Value> idval(cx);
|
|
double array_index;
|
|
int32_t i;
|
|
if (JSID_IS_SYMBOL(id) ||
|
|
!::JS_IdToValue(cx, id, &idval) ||
|
|
!JS::ToNumber(cx, idval, &array_index) ||
|
|
!::JS_DoubleIsInt32(array_index, &i)) {
|
|
return -1;
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
bool
|
|
DOMProxyHandler::setCustom(JSContext* cx, JS::Handle<JSObject*> proxy, JS::Handle<jsid> id,
|
|
JS::MutableHandle<JS::Value> vp, bool *done) const
|
|
{
|
|
*done = false;
|
|
return true;
|
|
}
|
|
|
|
//static
|
|
JSObject *
|
|
DOMProxyHandler::GetExpandoObject(JSObject *obj)
|
|
{
|
|
MOZ_ASSERT(IsDOMProxy(obj), "expected a DOM proxy object");
|
|
JS::Value v = js::GetProxyExtra(obj, JSPROXYSLOT_EXPANDO);
|
|
if (v.isObject()) {
|
|
return &v.toObject();
|
|
}
|
|
|
|
if (v.isUndefined()) {
|
|
return nullptr;
|
|
}
|
|
|
|
js::ExpandoAndGeneration* expandoAndGeneration =
|
|
static_cast<js::ExpandoAndGeneration*>(v.toPrivate());
|
|
v = expandoAndGeneration->expando;
|
|
return v.isUndefined() ? nullptr : &v.toObject();
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|