| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef MOJO_PUBLIC_CPP_BINDINGS_MAP_TRAITS_WTF_HASH_MAP_H_ |
| #define MOJO_PUBLIC_CPP_BINDINGS_MAP_TRAITS_WTF_HASH_MAP_H_ |
| |
| #include "base/logging.h" |
| #include "mojo/public/cpp/bindings/map_traits.h" |
| #include "third_party/blink/renderer/platform/wtf/hash_map.h" |
| |
| namespace mojo { |
| |
| template <typename K, typename V> |
| struct MapTraits<WTF::HashMap<K, V>> { |
| using Key = K; |
| using Value = V; |
| using Iterator = typename WTF::HashMap<K, V>::iterator; |
| using ConstIterator = typename WTF::HashMap<K, V>::const_iterator; |
| |
| static bool IsNull(const WTF::HashMap<K, V>& input) { |
| // WTF::HashMap<> is always converted to non-null mojom map. |
| return false; |
| } |
| |
| static void SetToNull(WTF::HashMap<K, V>* output) { |
| // WTF::HashMap<> doesn't support null state. Set it to empty instead. |
| output->clear(); |
| } |
| |
| static size_t GetSize(const WTF::HashMap<K, V>& input) { |
| return input.size(); |
| } |
| |
| static ConstIterator GetBegin(const WTF::HashMap<K, V>& input) { |
| return input.begin(); |
| } |
| static Iterator GetBegin(WTF::HashMap<K, V>& input) { return input.begin(); } |
| |
| static void AdvanceIterator(ConstIterator& iterator) { ++iterator; } |
| static void AdvanceIterator(Iterator& iterator) { ++iterator; } |
| |
| static const K& GetKey(Iterator& iterator) { return iterator->key; } |
| static const K& GetKey(ConstIterator& iterator) { return iterator->key; } |
| |
| static V& GetValue(Iterator& iterator) { return iterator->value; } |
| static const V& GetValue(ConstIterator& iterator) { return iterator->value; } |
| |
| template <typename IK, typename IV> |
| static bool Insert(WTF::HashMap<K, V>& input, IK&& key, IV&& value) { |
| if (!WTF::HashMap<K, V>::IsValidKey(key)) { |
| LOG(ERROR) << "The key value is disallowed by WTF::HashMap"; |
| return false; |
| } |
| input.insert(std::forward<IK>(key), std::forward<IV>(value)); |
| return true; |
| } |
| |
| static void SetToEmpty(WTF::HashMap<K, V>* output) { output->clear(); } |
| }; |
| |
| } // namespace mojo |
| |
| #endif // MOJO_PUBLIC_CPP_BINDINGS_MAP_TRAITS_WTF_HASH_MAP_H_ |