mozilla
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gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
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gecko-dev/dom/base/ChromeUtils.cpp

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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/. */
#include "ChromeUtils.h"
#include "jsfriendapi.h"
#include "WrapperFactory.h"
#include "mozilla/Base64.h"
#include "mozilla/BasePrincipal.h"
namespace mozilla {
namespace dom {
/* static */ void
ThreadSafeChromeUtils::NondeterministicGetWeakMapKeys(GlobalObject& aGlobal,
JS::Handle<JS::Value> aMap,
JS::MutableHandle<JS::Value> aRetval,
ErrorResult& aRv)
{
if (!aMap.isObject()) {
aRetval.setUndefined();
} else {
JSContext* cx = aGlobal.Context();
JS::Rooted<JSObject*> objRet(cx);
JS::Rooted<JSObject*> mapObj(cx, &aMap.toObject());
if (!JS_NondeterministicGetWeakMapKeys(cx, mapObj, &objRet)) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
} else {
aRetval.set(objRet ? JS::ObjectValue(*objRet) : JS::UndefinedValue());
}
}
}
/* static */ void
ThreadSafeChromeUtils::NondeterministicGetWeakSetKeys(GlobalObject& aGlobal,
JS::Handle<JS::Value> aSet,
JS::MutableHandle<JS::Value> aRetval,
ErrorResult& aRv)
{
if (!aSet.isObject()) {
aRetval.setUndefined();
} else {
JSContext* cx = aGlobal.Context();
JS::Rooted<JSObject*> objRet(cx);
JS::Rooted<JSObject*> setObj(cx, &aSet.toObject());
if (!JS_NondeterministicGetWeakSetKeys(cx, setObj, &objRet)) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
} else {
aRetval.set(objRet ? JS::ObjectValue(*objRet) : JS::UndefinedValue());
}
}
}
/* static */ void
ThreadSafeChromeUtils::Base64URLEncode(GlobalObject& aGlobal,
const ArrayBufferViewOrArrayBuffer& aSource,
const Base64URLEncodeOptions& aOptions,
nsACString& aResult,
ErrorResult& aRv)
{
size_t length = 0;
uint8_t* data = nullptr;
if (aSource.IsArrayBuffer()) {
const ArrayBuffer& buffer = aSource.GetAsArrayBuffer();
buffer.ComputeLengthAndData();
length = buffer.Length();
data = buffer.Data();
} else if (aSource.IsArrayBufferView()) {
const ArrayBufferView& view = aSource.GetAsArrayBufferView();
view.ComputeLengthAndData();
length = view.Length();
data = view.Data();
} else {
MOZ_CRASH("Uninitialized union: expected buffer or view");
}
auto paddingPolicy = aOptions.mPad ? Base64URLEncodePaddingPolicy::Include :
Base64URLEncodePaddingPolicy::Omit;
nsresult rv = mozilla::Base64URLEncode(length, data, paddingPolicy, aResult);
if (NS_WARN_IF(NS_FAILED(rv))) {
aResult.Truncate();
aRv.Throw(rv);
}
}
/* static */ void
ThreadSafeChromeUtils::Base64URLDecode(GlobalObject& aGlobal,
const nsACString& aString,
const Base64URLDecodeOptions& aOptions,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv)
{
Base64URLDecodePaddingPolicy paddingPolicy;
switch (aOptions.mPadding) {
case Base64URLDecodePadding::Require:
paddingPolicy = Base64URLDecodePaddingPolicy::Require;
break;
case Base64URLDecodePadding::Ignore:
paddingPolicy = Base64URLDecodePaddingPolicy::Ignore;
break;
case Base64URLDecodePadding::Reject:
paddingPolicy = Base64URLDecodePaddingPolicy::Reject;
break;
default:
aRv.Throw(NS_ERROR_INVALID_ARG);
return;
}
FallibleTArray<uint8_t> data;
nsresult rv = mozilla::Base64URLDecode(aString, paddingPolicy, data);
if (NS_WARN_IF(NS_FAILED(rv))) {
aRv.Throw(rv);
return;
}
JS::Rooted<JSObject*> buffer(aGlobal.Context(),
ArrayBuffer::Create(aGlobal.Context(),
data.Length(),
data.Elements()));
if (NS_WARN_IF(!buffer)) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
aRetval.set(buffer);
}
/* static */ void
ChromeUtils::WaiveXrays(GlobalObject& aGlobal,
JS::HandleValue aVal,
JS::MutableHandleValue aRetval,
ErrorResult& aRv)
{
JS::RootedValue value(aGlobal.Context(), aVal);
if (!xpc::WrapperFactory::WaiveXrayAndWrap(aGlobal.Context(), &value)) {
aRv.NoteJSContextException(aGlobal.Context());
} else {
aRetval.set(value);
}
}
/* static */ void
ChromeUtils::UnwaiveXrays(GlobalObject& aGlobal,
JS::HandleValue aVal,
JS::MutableHandleValue aRetval,
ErrorResult& aRv)
{
if (!aVal.isObject()) {
aRetval.set(aVal);
return;
}
JS::RootedObject obj(aGlobal.Context(), js::UncheckedUnwrap(&aVal.toObject()));
if (!JS_WrapObject(aGlobal.Context(), &obj)) {
aRv.NoteJSContextException(aGlobal.Context());
} else {
aRetval.setObject(*obj);
}
}
/* static */ void
ChromeUtils::GetClassName(GlobalObject& aGlobal,
JS::HandleObject aObj,
bool aUnwrap,
nsAString& aRetval)
{
JS::RootedObject obj(aGlobal.Context(), aObj);
if (aUnwrap) {
obj = js::UncheckedUnwrap(obj, /* stopAtWindowProxy = */ false);
}
aRetval = NS_ConvertUTF8toUTF16(nsDependentCString(js::GetObjectClass(obj)->name));
}
/* static */ void
ChromeUtils::ShallowClone(GlobalObject& aGlobal,
JS::HandleObject aObj,
JS::HandleObject aTarget,
JS::MutableHandleObject aRetval,
ErrorResult& aRv)
{
JSContext* cx = aGlobal.Context();
auto cleanup = MakeScopeExit([&] () {
aRv.NoteJSContextException(cx);
});
JS::Rooted<JS::IdVector> ids(cx, JS::IdVector(cx));
JS::AutoValueVector values(cx);
{
JS::RootedObject obj(cx, js::CheckedUnwrap(aObj));
if (!obj) {
js::ReportAccessDenied(cx);
return;
}
if (js::IsScriptedProxy(obj)) {
JS_ReportErrorASCII(cx, "Shallow cloning a proxy object is not allowed");
return;
}
JSAutoCompartment ac(cx, obj);
if (!JS_Enumerate(cx, obj, &ids) ||
!values.reserve(ids.length())) {
return;
}
JS::Rooted<JS::PropertyDescriptor> desc(cx);
JS::RootedId id(cx);
for (jsid idVal : ids) {
id = idVal;
if (!JS_GetOwnPropertyDescriptorById(cx, obj, id, &desc)) {
continue;
}
if (desc.setter() || desc.getter()) {
continue;
}
values.infallibleAppend(desc.value());
}
}
JS::RootedObject obj(cx);
{
Maybe<JSAutoCompartment> ac;
if (aTarget) {
JS::RootedObject target(cx, js::CheckedUnwrap(aTarget));
if (!target) {
js::ReportAccessDenied(cx);
return;
}
ac.emplace(cx, target);
}
obj = JS_NewPlainObject(cx);
if (!obj) {
return;
}
JS::RootedValue value(cx);
JS::RootedId id(cx);
for (uint32_t i = 0; i < ids.length(); i++) {
id = ids[i];
value = values[i];
JS_MarkCrossZoneId(cx, id);
if (!JS_WrapValue(cx, &value) ||
!JS_SetPropertyById(cx, obj, id, value)) {
return;
}
}
}
if (aTarget && !JS_WrapObject(cx, &obj)) {
return;
}
cleanup.release();
aRetval.set(obj);
}
/* static */ void
ChromeUtils::OriginAttributesToSuffix(dom::GlobalObject& aGlobal,
const dom::OriginAttributesDictionary& aAttrs,
nsCString& aSuffix)
{
OriginAttributes attrs(aAttrs);
attrs.CreateSuffix(aSuffix);
}
/* static */ bool
ChromeUtils::OriginAttributesMatchPattern(dom::GlobalObject& aGlobal,
const dom::OriginAttributesDictionary& aAttrs,
const dom::OriginAttributesPatternDictionary& aPattern)
{
OriginAttributes attrs(aAttrs);
OriginAttributesPattern pattern(aPattern);
return pattern.Matches(attrs);
}
/* static */ void
ChromeUtils::CreateOriginAttributesFromOrigin(dom::GlobalObject& aGlobal,
const nsAString& aOrigin,
dom::OriginAttributesDictionary& aAttrs,
ErrorResult& aRv)
{
OriginAttributes attrs;
nsAutoCString suffix;
if (!attrs.PopulateFromOrigin(NS_ConvertUTF16toUTF8(aOrigin), suffix)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
aAttrs = attrs;
}
/* static */ void
ChromeUtils::FillNonDefaultOriginAttributes(dom::GlobalObject& aGlobal,
const dom::OriginAttributesDictionary& aAttrs,
dom::OriginAttributesDictionary& aNewAttrs)
{
aNewAttrs = aAttrs;
}
/* static */ bool
ChromeUtils::IsOriginAttributesEqual(dom::GlobalObject& aGlobal,
const dom::OriginAttributesDictionary& aA,
const dom::OriginAttributesDictionary& aB)
{
return IsOriginAttributesEqual(aA, aB);
}
/* static */ bool
ChromeUtils::IsOriginAttributesEqual(const dom::OriginAttributesDictionary& aA,
const dom::OriginAttributesDictionary& aB)
{
return aA.mAppId == aB.mAppId &&
aA.mInIsolatedMozBrowser == aB.mInIsolatedMozBrowser &&
aA.mUserContextId == aB.mUserContextId &&
aA.mPrivateBrowsingId == aB.mPrivateBrowsingId;
}
} // namespace dom
} // namespace mozilla
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