1 /*
2  * Copyright (c) 2022 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef FOUNDATION_ACE_FRAMEWORKS_BRIDGE_COMMON_UTILS_ENGINE_HELPER_H
17 #define FOUNDATION_ACE_FRAMEWORKS_BRIDGE_COMMON_UTILS_ENGINE_HELPER_H
18 
19 #include <mutex>
20 #include <shared_mutex>
21 
22 #include "core/common/container.h"
23 #include "base/memory/referenced.h"
24 #include "base/utils/macros.h"
25 #include "base/utils/noncopyable.h"
26 #include "bridge/js_frontend/engine/common/js_engine.h"
27 #include "bridge/js_frontend/frontend_delegate.h"
28 
29 namespace OHOS::Ace {
30 class ContainerScope;
31 
32 class ACE_FORCE_EXPORT ScopedDelegate final {
33 public:
34     ScopedDelegate(const RefPtr<Framework::FrontendDelegate>& delegate, int32_t id);
35     ~ScopedDelegate();
36 
37     Framework::FrontendDelegate* operator->() const
38     {
39         return AceType::RawPtr(delegate_);
40     }
41 
42     bool operator==(std::nullptr_t) const
43     {
44         return delegate_ == nullptr;
45     }
46 
47     operator bool() const
48     {
49         return delegate_ != nullptr;
50     }
51 
52 private:
53     RefPtr<Framework::FrontendDelegate> delegate_;
54     ContainerScope* scope_;
55 };
56 
57 class ACE_FORCE_EXPORT EngineHelper final {
58 public:
59     static void AddEngine(int32_t id, WeakPtr<Framework::JsEngine> engine);
60 
61     static RefPtr<Framework::JsEngine> GetEngine(int32_t id);
62 
63     static void RemoveEngine(int32_t id);
64 
65     static RefPtr<Framework::JsEngine> GetCurrentEngine();
66 
67     static RefPtr<Framework::JsEngine> GetCurrentEngineSafely();
68 
69     static ScopedDelegate GetCurrentDelegate();
70 
71     static ScopedDelegate GetCurrentDelegateSafely();
72 
73     static ScopedDelegate GetDefaultDelegate();
74 
75     static std::pair<int32_t, int32_t> GetPositionOnJsCode();
76 
77     static ScopedDelegate GetDelegateByContainer(RefPtr<Container> container);
78 
79     static void RegisterRemoveUIContextFunc(const std::function<void(int32_t)>& removeUIContextFunc);
80 
81 private:
82     static std::pair<int32_t, int32_t> StringToPair(const std::string& match);
83 
84     static std::unordered_map<int32_t, WeakPtr<Framework::JsEngine>> engineWeakMap_;
85     static std::shared_mutex mutex_;
86 
87     static std::function<void(int32_t)> removeUIContextFunc_;
88 
89     ACE_DISALLOW_COPY_AND_MOVE(EngineHelper);
90 };
91 } // namespace OHOS::Ace
92 #endif // FOUNDATION_ACE_FRAMEWORKS_BRIDGE_COMMON_UTILS_ENGINE_HELPER_H
93