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Diffstat (limited to 'dom/bindings/Record.h')
-rw-r--r-- | dom/bindings/Record.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/dom/bindings/Record.h b/dom/bindings/Record.h new file mode 100644 index 0000000000..f88ef40d8f --- /dev/null +++ b/dom/bindings/Record.h @@ -0,0 +1,87 @@ +/* -*- 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/. */ + +/** + * Class for representing record arguments. Basically an array under the hood. + */ + +#ifndef mozilla_dom_Record_h +#define mozilla_dom_Record_h + +#include <utility> + +#include "mozilla/Attributes.h" +#include "nsHashKeys.h" +#include "nsString.h" +#include "nsTArray.h" +#include "nsTHashtable.h" + +namespace mozilla { +namespace dom { + +namespace binding_detail { +template <typename KeyType, typename ValueType> +class RecordEntry { + public: + RecordEntry() = default; + + // Move constructor so we can do Records of Records. + RecordEntry(RecordEntry<KeyType, ValueType>&& aOther) + : mKey(std::move(aOther.mKey)), mValue(std::move(aOther.mValue)) {} + + KeyType mKey; + ValueType mValue; +}; + +// Specialize for a JSObject* ValueType and initialize it on construction, so we +// don't need to worry about un-initialized JSObject* floating around. +template <typename KeyType> +class RecordEntry<KeyType, JSObject*> { + public: + RecordEntry() : mValue(nullptr) {} + + // Move constructor so we can do Records of Records. + RecordEntry(RecordEntry<KeyType, JSObject*>&& aOther) + : mKey(std::move(aOther.mKey)), mValue(std::move(aOther.mValue)) {} + + KeyType mKey; + JSObject* mValue; +}; + +} // namespace binding_detail + +template <typename KeyType, typename ValueType> +class Record { + public: + typedef typename binding_detail::RecordEntry<KeyType, ValueType> EntryType; + typedef Record<KeyType, ValueType> SelfType; + + Record() = default; + + // Move constructor so we can do Record of Record. + Record(SelfType&& aOther) : mEntries(std::move(aOther.mEntries)) {} + + const nsTArray<EntryType>& Entries() const { return mEntries; } + + nsTArray<EntryType>& Entries() { return mEntries; } + + private: + nsTArray<EntryType> mEntries; +}; + +} // namespace dom +} // namespace mozilla + +template <typename K, typename V> +class nsDefaultComparator<mozilla::dom::binding_detail::RecordEntry<K, V>, K> { + public: + bool Equals(const mozilla::dom::binding_detail::RecordEntry<K, V>& aEntry, + const K& aKey) const { + return aEntry.mKey == aKey; + } +}; + +#endif // mozilla_dom_Record_h |