77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
// Copyright (c) 2004-present, Facebook, Inc.
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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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#include "JSCNativeModules.h"
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#include <string>
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#include "ModuleRegistry.h"
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#include "ReactMarker.h"
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namespace facebook {
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namespace react {
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JSCNativeModules::JSCNativeModules(std::shared_ptr<ModuleRegistry> moduleRegistry) :
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m_moduleRegistry(std::move(moduleRegistry)) {}
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JSValueRef JSCNativeModules::getModule(JSContextRef context, JSStringRef jsName) {
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if (!m_moduleRegistry) {
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return nullptr;
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}
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std::string moduleName = String::ref(context, jsName).str();
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const auto it = m_objects.find(moduleName);
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if (it != m_objects.end()) {
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return static_cast<JSObjectRef>(it->second);
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}
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auto module = createModule(moduleName, context);
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if (!module.hasValue()) {
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// Allow lookup to continue in the objects own properties, which allows for overrides of NativeModules
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return nullptr;
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}
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// Protect since we'll be holding on to this value, even though JS may not
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module->makeProtected();
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auto result = m_objects.emplace(std::move(moduleName), std::move(*module)).first;
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return static_cast<JSObjectRef>(result->second);
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}
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void JSCNativeModules::reset() {
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m_genNativeModuleJS = nullptr;
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m_objects.clear();
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}
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folly::Optional<Object> JSCNativeModules::createModule(const std::string& name, JSContextRef context) {
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ReactMarker::logTaggedMarker(ReactMarker::NATIVE_MODULE_SETUP_START, name.c_str());
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if (!m_genNativeModuleJS) {
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auto global = Object::getGlobalObject(context);
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m_genNativeModuleJS = global.getProperty("__fbGenNativeModule").asObject();
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m_genNativeModuleJS->makeProtected();
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}
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auto result = m_moduleRegistry->getConfig(name);
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if (!result.hasValue()) {
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return nullptr;
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}
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Value moduleInfo = m_genNativeModuleJS->callAsFunction({
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Value::fromDynamic(context, result->config),
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Value::makeNumber(context, result->index)
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});
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CHECK(!moduleInfo.isNull()) << "Module returned from genNativeModule is null";
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folly::Optional<Object> module(moduleInfo.asObject().getProperty("module").asObject());
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ReactMarker::logTaggedMarker(ReactMarker::NATIVE_MODULE_SETUP_STOP, name.c_str());
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return module;
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}
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} }
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