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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/TrustedTypePolicyFactory.h"
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/RefPtr.h"
#include "mozilla/dom/TrustedTypePolicy.h"
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(TrustedTypePolicyFactory, mGlobalObject)
JSObject* TrustedTypePolicyFactory::WrapObject(
JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
return TrustedTypePolicyFactory_Binding::Wrap(aCx, this, aGivenProto);
}
already_AddRefed<TrustedTypePolicy> TrustedTypePolicyFactory::CreatePolicy(
const nsAString& aPolicyName,
const TrustedTypePolicyOptions& aPolicyOptions) {
// TODO: add CSP support.
// TODO: add default policy support; this requires accessing the default
// policy on the C++ side, hence already now ref-counting policy
// objects.
TrustedTypePolicy::Options options;
if (aPolicyOptions.mCreateHTML.WasPassed()) {
options.mCreateHTMLCallback = &aPolicyOptions.mCreateHTML.Value();
}
if (aPolicyOptions.mCreateScript.WasPassed()) {
options.mCreateScriptCallback = &aPolicyOptions.mCreateScript.Value();
}
if (aPolicyOptions.mCreateScriptURL.WasPassed()) {
options.mCreateScriptURLCallback = &aPolicyOptions.mCreateScriptURL.Value();
}
RefPtr<TrustedTypePolicy> policy =
MakeRefPtr<TrustedTypePolicy>(this, aPolicyName, std::move(options));
mCreatedPolicyNames.AppendElement(aPolicyName);
return policy.forget();
}
#define IS_TRUSTED_TYPE_IMPL(_trustedTypeSuffix) \
bool TrustedTypePolicyFactory::Is##_trustedTypeSuffix( \
JSContext*, const JS::Handle<JS::Value>& aValue) const { \
/** \
* No need to check the internal slot. \
* Ensured by the corresponding test: \
* <https://searchfox.org/mozilla-central/rev/b60cb73160843adb5a5a3ec8058e75a69b46acf7/testing/web-platform/tests/trusted-types/TrustedTypePolicyFactory-isXXX.html> \
*/ \
return aValue.isObject() && \
IS_INSTANCE_OF(Trusted##_trustedTypeSuffix, &aValue.toObject()); \
}
IS_TRUSTED_TYPE_IMPL(HTML);
IS_TRUSTED_TYPE_IMPL(Script);
IS_TRUSTED_TYPE_IMPL(ScriptURL);
UniquePtr<TrustedHTML> TrustedTypePolicyFactory::EmptyHTML() {
// Preserving the wrapper ensures:
// ```
// const e = trustedTypes.emptyHTML;
// e === trustedTypes.emptyHTML;
// ```
// which comes with the cost of keeping the factory, one per global, alive.
// An additional benefit is it saves the cost of re-instantiating potentially
// multiple emptyHML objects. Both, the JS- and the C++-objects.
dom::PreserveWrapper(this);
return MakeUnique<TrustedHTML>(EmptyString());
}
UniquePtr<TrustedScript> TrustedTypePolicyFactory::EmptyScript() {
// See the explanation in `EmptyHTML()`.
dom::PreserveWrapper(this);
return MakeUnique<TrustedScript>(EmptyString());
}
} // namespace mozilla::dom
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