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261 lines (230 loc) · 9.33 KB
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/*
* Copyright (c) Kudo Chien.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#include "HostProxy.h"
#include "JSIV8ValueConverter.h"
namespace jsi = facebook::jsi;
namespace rnv8 {
HostObjectProxy::HostObjectProxy(V8Runtime& runtime, v8::Isolate* isolate,
std::shared_ptr<jsi::HostObject> hostObject)
: runtime_(runtime), isolate_(isolate), hostObject_(hostObject) {}
void HostObjectProxy::BindFinalizer(const v8::Local<v8::Object>& object) {
v8::HandleScope scopedHandle(isolate_);
weakHandle_.Reset(isolate_, object);
weakHandle_.SetWeak(this, Finalizer, v8::WeakCallbackType::kParameter);
}
std::shared_ptr<jsi::HostObject> HostObjectProxy::GetHostObject() {
return hostObject_;
}
// static
v8::Intercepted HostObjectProxy::Getter(
v8::Local<v8::Name> property,
const v8::PropertyCallbackInfo<v8::Value>& info) {
v8::HandleScope scopedHandle(info.GetIsolate());
v8::Local<v8::External> data =
v8::Local<v8::External>::Cast(info.Holder()->GetInternalField(1));
HostObjectProxy* hostObjectProxy = reinterpret_cast<HostObjectProxy*>(
data->Value(v8::kExternalPointerTypeTagDefault));
assert(hostObjectProxy);
auto& runtime = hostObjectProxy->runtime_;
jsi::PropNameID sym = JSIV8ValueConverter::ToJSIPropNameID(runtime, property);
jsi::Value ret;
try {
ret = hostObjectProxy->hostObject_->get(runtime, sym);
} catch (const jsi::JSError& error) {
info.GetIsolate()->ThrowException(
JSIV8ValueConverter::ToV8Value(runtime, error.value()));
return v8::Intercepted::kYes;
} catch (const std::exception& ex) {
auto excValue =
runtime.global()
.getPropertyAsFunction(runtime, "Error")
.call(runtime,
std::string("Exception in HostObject::get(property:") +
JSIV8ValueConverter::ToSTLString(info.GetIsolate(),
property) +
std::string("): ") + ex.what());
info.GetIsolate()->ThrowException(
JSIV8ValueConverter::ToV8Value(runtime, excValue));
return v8::Intercepted::kYes;
} catch (...) {
auto excValue =
runtime.global()
.getPropertyAsFunction(runtime, "Error")
.call(runtime,
std::string("Exception in HostObject::get(property:") +
JSIV8ValueConverter::ToSTLString(info.GetIsolate(),
property) +
std::string("): <unknown>"));
info.GetIsolate()->ThrowException(
JSIV8ValueConverter::ToV8Value(runtime, excValue));
return v8::Intercepted::kYes;
}
info.GetReturnValue().Set(JSIV8ValueConverter::ToV8Value(runtime, ret));
return v8::Intercepted::kYes;
}
// static
v8::Intercepted HostObjectProxy::Setter(
v8::Local<v8::Name> property, v8::Local<v8::Value> value,
const v8::PropertyCallbackInfo<v8::Boolean>& info) {
v8::HandleScope scopedHandle(info.GetIsolate());
v8::Local<v8::External> data =
v8::Local<v8::External>::Cast(info.Holder()->GetInternalField(1));
HostObjectProxy* hostObjectProxy = reinterpret_cast<HostObjectProxy*>(
data->Value(v8::kExternalPointerTypeTagDefault));
assert(hostObjectProxy);
auto& runtime = hostObjectProxy->runtime_;
jsi::PropNameID sym = JSIV8ValueConverter::ToJSIPropNameID(runtime, property);
try {
hostObjectProxy->hostObject_->set(
runtime, sym,
JSIV8ValueConverter::ToJSIValue(info.GetIsolate(), value));
} catch (const jsi::JSError& error) {
info.GetIsolate()->ThrowException(
JSIV8ValueConverter::ToV8Value(runtime, error.value()));
return v8::Intercepted::kYes;
} catch (const std::exception& ex) {
auto excValue =
runtime.global()
.getPropertyAsFunction(runtime, "Error")
.call(runtime,
std::string("Exception in HostObject::set(property:") +
JSIV8ValueConverter::ToSTLString(info.GetIsolate(),
property) +
std::string("): ") + ex.what());
info.GetIsolate()->ThrowException(
JSIV8ValueConverter::ToV8Value(runtime, excValue));
return v8::Intercepted::kYes;
} catch (...) {
auto excValue =
runtime.global()
.getPropertyAsFunction(runtime, "Error")
.call(runtime,
std::string("Exception in HostObject::set(property:") +
JSIV8ValueConverter::ToSTLString(info.GetIsolate(),
property) +
std::string("): <unknown>"));
info.GetIsolate()->ThrowException(
JSIV8ValueConverter::ToV8Value(runtime, excValue));
return v8::Intercepted::kYes;
}
// Not intercepted: the native write is done, but V8 must still perform
// the ordinary store, which is what the old void-returning callback did
// by falling through without setting a return value.
return v8::Intercepted::kNo;
}
// static
void HostObjectProxy::Enumerator(
const v8::PropertyCallbackInfo<v8::Array>& info) {
v8::HandleScope scopedHandle(info.GetIsolate());
v8::Local<v8::External> data =
v8::Local<v8::External>::Cast(info.Holder()->GetInternalField(1));
HostObjectProxy* hostObjectProxy = reinterpret_cast<HostObjectProxy*>(
data->Value(v8::kExternalPointerTypeTagDefault));
assert(hostObjectProxy);
auto& runtime = hostObjectProxy->runtime_;
auto names = hostObjectProxy->hostObject_->getPropertyNames(runtime);
v8::Local<v8::Array> result =
v8::Array::New(info.GetIsolate(), static_cast<int>(names.size()));
v8::Local<v8::Context> context = info.GetIsolate()->GetCurrentContext();
for (uint32_t i = 0; i < result->Length(); ++i) {
v8::Local<v8::Value> value =
JSIV8ValueConverter::ToV8String(runtime, names[i]);
if (!result->Set(context, i, value).FromJust()) {
std::abort();
};
}
info.GetReturnValue().Set(result);
}
// static
void HostObjectProxy::Finalizer(
const v8::WeakCallbackInfo<HostObjectProxy>& data) {
auto* pThis = data.GetParameter();
if (pThis->hostObject_.use_count() == 1) {
pThis->hostObject_.reset();
}
pThis->weakHandle_.Reset();
delete pThis;
}
HostFunctionProxy::HostFunctionProxy(V8Runtime& runtime, v8::Isolate* isolate,
jsi::HostFunctionType&& hostFunction)
: runtime_(runtime),
isolate_(isolate),
hostFunction_(std::move(hostFunction)) {}
void HostFunctionProxy::BindFinalizer(const v8::Local<v8::Object>& object) {
v8::HandleScope scopedHandle(isolate_);
weakHandle_.Reset(isolate_, object);
weakHandle_.SetWeak(this, Finalizer, v8::WeakCallbackType::kParameter);
}
jsi::HostFunctionType& HostFunctionProxy::GetHostFunction() {
return hostFunction_;
}
// static
void HostFunctionProxy::Finalizer(
const v8::WeakCallbackInfo<HostFunctionProxy>& data) {
auto* pThis = data.GetParameter();
pThis->weakHandle_.Reset();
delete pThis;
}
// static
void HostFunctionProxy::FunctionCallback(
const v8::FunctionCallbackInfo<v8::Value>& info) {
v8::HandleScope scopedHandle(info.GetIsolate());
v8::Local<v8::External> data = v8::Local<v8::External>::Cast(info.Data());
auto* hostFunctionProxy = reinterpret_cast<HostFunctionProxy*>(
data->Value(v8::kExternalPointerTypeTagDefault));
auto& runtime = hostFunctionProxy->runtime_;
int argumentCount = info.Length();
const unsigned maxStackArgCount = 8;
jsi::Value stackArgs[maxStackArgCount];
std::unique_ptr<jsi::Value[]> heapArgs;
jsi::Value* args;
if (argumentCount > maxStackArgCount) {
heapArgs = std::make_unique<jsi::Value[]>(argumentCount);
for (size_t i = 0; i < argumentCount; i++) {
heapArgs[i] =
JSIV8ValueConverter::ToJSIValue(info.GetIsolate(), info[(int)i]);
}
args = heapArgs.get();
} else {
for (size_t i = 0; i < argumentCount; i++) {
stackArgs[i] =
JSIV8ValueConverter::ToJSIValue(info.GetIsolate(), info[(int)i]);
}
args = stackArgs;
}
v8::Local<v8::Value> result;
jsi::Value thisVal(
JSIV8ValueConverter::ToJSIValue(info.GetIsolate(), info.This()));
try {
result = JSIV8ValueConverter::ToV8Value(
runtime, hostFunctionProxy->hostFunction_(runtime, thisVal, args,
argumentCount));
} catch (const jsi::JSError& error) {
info.GetIsolate()->ThrowException(
JSIV8ValueConverter::ToV8Value(runtime, error.value()));
return;
} catch (const std::exception& ex) {
std::string exceptionString("Exception in HostFunction: ");
exceptionString += ex.what();
auto excValue = runtime.global()
.getPropertyAsFunction(runtime, "Error")
.call(runtime, exceptionString);
info.GetIsolate()->ThrowException(
JSIV8ValueConverter::ToV8Value(runtime, excValue));
return;
} catch (...) {
std::string exceptionString("Exception in HostFunction: <unknown>");
auto excValue = runtime.global()
.getPropertyAsFunction(runtime, "Error")
.call(runtime, exceptionString);
info.GetIsolate()->ThrowException(
JSIV8ValueConverter::ToV8Value(runtime, excValue));
return;
}
info.GetReturnValue().Set(result);
}
} // namespace rnv8