mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Ramanpreet Nara
cb7f3f4499
Summary:
## Android API
```
// Before we initialize TurboModuleManager
ReactFeatureFlags.useTurboModuleJSCodegen = true
```
## iOS API
```
// Before we initialize RCTBridge
RCTEnableTurboModuleJSCodegen(true);
```
## How is the JS Codegen actually enabled?
The above native flags are translated to the following global variable in JavaScript:
```
global.RN$JSTurboModuleCodegenEnabled = true;
```
Then, all our NativeModule specs are transpiled to contain this logic:
```
interface Foo extends TurboModule {
// ...
}
function __getModuleSchema() {
if (!global.RN$JSTurboModuleCodegenEnabled) {
return undefined;
}
// Return the schema of this spec.
return {...};
}
export default TurboModuleRegistry.get<Foo>('foo', __getModuleSchema());
```
Then, in our C++ JavaTurboModule, and ObjCTurboModule classes, we use the TurboModule JS codegen when the jsi::Object schema is provided from JavaScript in the TurboModuleRegistry.get call.
Changelog: [Internal]
Reviewed By: PeteTheHeat
Differential Revision: D24636307
fbshipit-source-id: 80dcd604cc1121b8a69df875bbfc87e9bb8e4814
94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include "TurboModuleBinding.h"
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#include <stdexcept>
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#include <string>
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#include <ReactCommon/LongLivedObject.h>
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#include <cxxreact/SystraceSection.h>
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using namespace facebook;
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namespace facebook {
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namespace react {
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/**
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* Public API to install the TurboModule system.
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*/
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TurboModuleBinding::TurboModuleBinding(
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const TurboModuleProviderFunctionType &&moduleProvider)
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: moduleProvider_(std::move(moduleProvider)) {}
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void TurboModuleBinding::install(
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jsi::Runtime &runtime,
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const TurboModuleProviderFunctionType &&moduleProvider,
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bool enableJSTurboModuleCodegen) {
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runtime.global().setProperty(
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runtime,
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"RN$JSTurboModuleCodegenEnabled",
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jsi::Value(enableJSTurboModuleCodegen));
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runtime.global().setProperty(
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runtime,
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"__turboModuleProxy",
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jsi::Function::createFromHostFunction(
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runtime,
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jsi::PropNameID::forAscii(runtime, "__turboModuleProxy"),
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1,
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[binding =
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std::make_shared<TurboModuleBinding>(std::move(moduleProvider))](
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jsi::Runtime &rt,
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const jsi::Value &thisVal,
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const jsi::Value *args,
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size_t count) {
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return binding->jsProxy(rt, thisVal, args, count);
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}));
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}
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TurboModuleBinding::~TurboModuleBinding() {
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LongLivedObjectCollection::get().clear();
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}
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std::shared_ptr<TurboModule> TurboModuleBinding::getModule(
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const std::string &name,
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const jsi::Value *schema) {
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std::shared_ptr<TurboModule> module = nullptr;
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{
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SystraceSection s("TurboModuleBinding::getModule", "module", name);
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module = moduleProvider_(name, schema);
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}
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return module;
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}
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jsi::Value TurboModuleBinding::jsProxy(
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jsi::Runtime &runtime,
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const jsi::Value &thisVal,
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const jsi::Value *args,
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size_t count) {
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if (count < 1) {
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throw std::invalid_argument(
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"__turboModuleProxy must be called with at least 1 argument");
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}
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std::string moduleName = args[0].getString(runtime).utf8(runtime);
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jsi::Value nullSchema = jsi::Value::undefined();
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std::shared_ptr<TurboModule> module =
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(count >= 2 ? getModule(moduleName, &args[1])
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: getModule(moduleName, &nullSchema));
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if (module == nullptr) {
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return jsi::Value::null();
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}
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return jsi::Object::createFromHostObject(runtime, std::move(module));
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}
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} // namespace react
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} // namespace facebook
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