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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/. */
#ifndef mozilla_dom_MozQueryInterface
#define mozilla_dom_MozQueryInterface
/**
* This class implements an optimized QueryInterface method for
* XPConnect-wrapped JS objects.
*
* For JavaScript callers, it behaves as an ordinary QueryInterface method,
* returning its `this` object or throwing depending on the interface it was
* passed.
*
* For native XPConnect callers, we bypass JSAPI entirely, and directly check
* whether the queried interface is in the interfaces list.
*/
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/NonRefcountedDOMObject.h"
#include "nsID.h"
namespace mozilla {
class ErrorResult;
namespace dom {
class MozQueryInterface final : public NonRefcountedDOMObject {
public:
explicit MozQueryInterface(nsTArray<nsIID>&& aInterfaces)
: mInterfaces(std::move(aInterfaces)) {}
bool QueriesTo(const nsIID& aIID) const;
void LegacyCall(JSContext* cx, JS::Handle<JS::Value> thisv,
JS::Handle<JS::Value> aIID,
JS::MutableHandle<JS::Value> aResult, ErrorResult& aRv) const;
nsISupports* GetParentObject() const { return nullptr; }
bool WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
JS::MutableHandle<JSObject*> aReflector);
private:
nsTArray<nsIID> mInterfaces;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_MozQueryInterface
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