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2dee0aae3c
This allows JS callers to automatically get the correct types during interation, without having to explicitly specify them. Differential Revision: https://phabricator.services.mozilla.com/D3728 --HG-- extra : rebase_source : b708f382d8ea571d199c669bfed5b5a7ca9ffac4 extra : histedit_source : 7df6feb82088c8a5ca45dc28fe4d2b852c177fee
88 lines
2.1 KiB
C++
88 lines
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsSimpleEnumerator.h"
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#include "mozilla/dom/IteratorResultBinding.h"
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#include "mozilla/dom/RootedDictionary.h"
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#include "mozilla/dom/ToJSValue.h"
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#include "mozilla/ResultExtensions.h"
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#include "nsContentUtils.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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namespace {
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class JSEnumerator final : public nsIJSEnumerator
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{
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NS_DECL_ISUPPORTS
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NS_DECL_NSIJSENUMERATOR
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explicit JSEnumerator(nsISimpleEnumerator* aEnumerator, const nsID& aIID)
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: mEnumerator(aEnumerator)
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, mIID(aIID)
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{}
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private:
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~JSEnumerator() = default;
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nsCOMPtr<nsISimpleEnumerator> mEnumerator;
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const nsID mIID;
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};
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} // anonymous namespace
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nsresult
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JSEnumerator::Iterator(nsIJSEnumerator** aResult)
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{
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RefPtr<JSEnumerator> result(this);
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result.forget(aResult);
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return NS_OK;
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}
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nsresult
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JSEnumerator::Next(JSContext* aCx, JS::MutableHandleValue aResult)
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{
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RootedDictionary<IteratorResult> result(aCx);
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nsCOMPtr<nsISupports> elem;
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if (NS_FAILED(mEnumerator->GetNext(getter_AddRefs(elem)))) {
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result.mDone = true;
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} else {
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result.mDone = false;
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JS::RootedValue value(aCx);
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MOZ_TRY(nsContentUtils::WrapNative(aCx, elem, &mIID, &value));
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result.mValue = value;
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}
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if (!ToJSValue(aCx, result, aResult)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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NS_IMPL_ISUPPORTS(JSEnumerator, nsIJSEnumerator)
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nsresult
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nsSimpleEnumerator::Iterator(nsIJSEnumerator **aResult)
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{
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auto result = MakeRefPtr<JSEnumerator>(this, DefaultInterface());
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result.forget(aResult);
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return NS_OK;
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}
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nsresult
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nsSimpleEnumerator::Entries(const nsIID& aIface, nsIJSEnumerator **aResult)
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{
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auto result = MakeRefPtr<JSEnumerator>(this, aIface);
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result.forget(aResult);
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return NS_OK;
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}
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NS_IMPL_ISUPPORTS(nsSimpleEnumerator, nsISimpleEnumerator, nsISimpleEnumeratorBase)
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