93 lines
3.6 KiB
C++
93 lines
3.6 KiB
C++
// Copyright 2024-present 650 Industries. All rights reserved.
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#include "SharedObject.h"
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#include "JSIUtils.h"
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namespace expo::SharedObject {
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#pragma mark - NativeState
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NativeState::NativeState(ObjectId objectId, ObjectReleaser releaser)
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: EventEmitter::NativeState(), objectId(objectId), releaser(std::move(releaser)) {}
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NativeState::~NativeState() {
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releaser(objectId);
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}
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#pragma mark - Utils
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void installBaseClass(jsi::Runtime &runtime, const ObjectReleaser& releaser) {
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jsi::Function baseClass = EventEmitter::getClass(runtime);
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jsi::Function klass = expo::common::createInheritingClass(runtime, "SharedObject", baseClass);
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jsi::Object prototype = klass.getPropertyAsObject(runtime, "prototype");
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jsi::Function releaseFunction = jsi::Function::createFromHostFunction(
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runtime,
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jsi::PropNameID::forAscii(runtime, "release"),
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1,
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[releaser](jsi::Runtime &runtime, const jsi::Value &thisValue, const jsi::Value *args, size_t count) -> jsi::Value {
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jsi::Object thisObject = thisValue.getObject(runtime);
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if (thisObject.hasNativeState<NativeState>(runtime)) {
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auto nativeState = thisObject.getNativeState<NativeState>(runtime);
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releaser(nativeState->objectId);
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// Should we reset the native state?
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thisObject.setNativeState(runtime, nullptr);
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}
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return jsi::Value::undefined();
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});
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// Implements a JSON serializer for shared objects, whose properties are defined in the prototype instead of the instance itself.
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// By default `JSON.stringify` visits only enumerable own properties.
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jsi::Function toJSONFunction = jsi::Function::createFromHostFunction(
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runtime,
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jsi::PropNameID::forAscii(runtime, "toJSON"),
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0,
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[](jsi::Runtime &runtime, const jsi::Value &thisValue, const jsi::Value *args, size_t count) -> jsi::Value {
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jsi::Object thisObject = thisValue.getObject(runtime);
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jsi::Object json = jsi::Object(runtime);
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jsi::Array propertyNames = thisObject.getPropertyNames(runtime);
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for (size_t i = 0, size = propertyNames.size(runtime); i < size; i++) {
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jsi::String propertyName = propertyNames.getValueAtIndex(runtime, i).getString(runtime);
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jsi::Value value = thisObject.getProperty(runtime, propertyName);
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if (!value.isObject() || !value.getObject(runtime).isFunction(runtime)) {
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json.setProperty(runtime, propertyName, value);
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}
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}
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return jsi::Value(runtime, json);
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});
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prototype.setProperty(runtime, "release", releaseFunction);
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prototype.setProperty(runtime, "toJSON", toJSONFunction);
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// This property should be deprecated, but it's still used when passing as a view prop.
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defineProperty(runtime, &prototype, "__expo_shared_object_id__", common::PropertyDescriptor {
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.get = [](jsi::Runtime &runtime, jsi::Object thisObject) {
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if (thisObject.hasNativeState<NativeState>(runtime)) {
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auto nativeState = thisObject.getNativeState<NativeState>(runtime);
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return jsi::Value((int)nativeState->objectId);
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}
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return jsi::Value(0);
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}
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});
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common::getCoreObject(runtime)
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.setProperty(runtime, "SharedObject", klass);
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}
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jsi::Function getBaseClass(jsi::Runtime &runtime) {
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return common::getCoreObject(runtime)
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.getPropertyAsFunction(runtime, "SharedObject");
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}
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jsi::Function createClass(jsi::Runtime &runtime, const char *className, common::ClassConstructor constructor) {
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jsi::Function baseSharedObjectClass = getBaseClass(runtime);
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return common::createInheritingClass(runtime, className, baseSharedObjectClass, std::move(constructor));
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}
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} // namespace expo::SharedObject
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