--- /dev/null
+// Copyright (c) 2015 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "atom/common/id_weak_map.h"
+
+#include <utility>
+
+#include "native_mate/converter.h"
+
+namespace atom {
+
+IDWeakMap::IDWeakMap() : next_id_(0) {
+}
+
+IDWeakMap::~IDWeakMap() {
+}
+
+int32_t IDWeakMap::Add(v8::Isolate* isolate, v8::Local<v8::Object> object) {
+ int32_t id = GetNextID();
+ object->SetHiddenValue(mate::StringToSymbol(isolate, "IDWeakMapKey"),
+ mate::Converter<int32_t>::ToV8(isolate, id));
+
+ auto global = make_linked_ptr(new v8::Global<v8::Object>(isolate, object));
+ global->SetWeak(this, &WeakCallback);
+ map_.emplace(id, global);
+ return id;
+}
+
+v8::MaybeLocal<v8::Object> IDWeakMap::Get(v8::Isolate* isolate, int32_t id) {
+ auto iter = map_.find(id);
+ if (iter == map_.end())
+ return v8::MaybeLocal<v8::Object>();
+ else
+ return v8::Local<v8::Object>::New(isolate, *iter->second);
+}
+
+bool IDWeakMap::Has(int32_t id) const {
+ return map_.find(id) != map_.end();
+}
+
+std::vector<int32_t> IDWeakMap::Keys() const {
+ std::vector<int32_t> keys;
+ keys.reserve(map_.size());
+ for (const auto& iter : map_)
+ keys.emplace_back(iter.first);
+ return keys;
+}
+
+void IDWeakMap::Remove(int32_t id) {
+ auto iter = map_.find(id);
+ if (iter == map_.end())
+ LOG(WARNING) << "Removing unexist object with ID " << id;
+ else
+ map_.erase(iter);
+}
+
+int IDWeakMap::GetNextID() {
+ return ++next_id_;
+}
+
+// static
+void IDWeakMap::WeakCallback(
+ const v8::WeakCallbackData<v8::Object, IDWeakMap>& data) {
+ int32_t id = data.GetValue()->GetHiddenValue(
+ mate::StringToV8(data.GetIsolate(), "IDWeakMapKey"))->Int32Value();
+ data.GetParameter()->Remove(id);
+}
+
+} // namespace atom
--- /dev/null
+// Copyright (c) 2015 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_COMMON_ID_WEAK_MAP_H_
+#define ATOM_COMMON_ID_WEAK_MAP_H_
+
+#include <unordered_map>
+#include <vector>
+
+#include "base/memory/linked_ptr.h"
+#include "v8/include/v8.h"
+
+namespace atom {
+
+// Like ES6's WeakMap, but the key is Integer and the value is Weak Pointer.
+class IDWeakMap {
+ public:
+ IDWeakMap();
+ ~IDWeakMap();
+
+ // Adds |object| to WeakMap and returns its allocated |id|.
+ int32_t Add(v8::Isolate* isolate, v8::Local<v8::Object> object);
+
+ // Gets the object from WeakMap by its |id|.
+ v8::MaybeLocal<v8::Object> Get(v8::Isolate* isolate, int32_t id);
+
+ // Whethere there is an object with |id| in this WeakMap.
+ bool Has(int32_t id) const;
+
+ // Returns IDs of all available objects.
+ std::vector<int32_t> Keys() const;
+
+ // Remove object with |id| in the WeakMap.
+ void Remove(int32_t key);
+
+ private:
+ // Returns next available ID.
+ int GetNextID();
+
+ static void WeakCallback(
+ const v8::WeakCallbackData<v8::Object, IDWeakMap>& data);
+
+ // ID of next stored object.
+ int32_t next_id_;
+
+ // Map of stored objects.
+ std::unordered_map<int32_t, linked_ptr<v8::Global<v8::Object>>> map_;
+
+ DISALLOW_COPY_AND_ASSIGN(IDWeakMap);
+};
+
+} // namespace atom
+
+#endif // ATOM_COMMON_ID_WEAK_MAP_H_
'atom/common/event_emitter_caller.cc',
'atom/common/event_emitter_caller.h',
'atom/common/google_api_key.h',
+ 'atom/common/id_weak_map.cc',
+ 'atom/common/id_weak_map.h',
'atom/common/linux/application_info.cc',
'atom/common/native_mate_converters/accelerator_converter.cc',
'atom/common/native_mate_converters/accelerator_converter.h',