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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gin/object_template_builder.h"
#include <stdint.h>
#include <string_view>
#include "base/strings/strcat.h"
#include "gin/interceptor.h"
#include "gin/per_isolate_data.h"
#include "gin/public/wrappable_pointer_tags.h"
#include "gin/public/wrapper_info.h"
#include "gin/wrappable.h"
#include "v8/include/v8-exception.h"
#include "v8/include/v8-object.h"
#include "v8/include/v8-template.h"
namespace gin {
NamedPropertyInterceptor* NamedInterceptorFromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
WrappablePointerTag tag) {
if (!val->IsObject()) {
return nullptr;
}
v8::Local<v8::Object> obj = val.As<v8::Object>();
if (!obj->IsApiWrapper()) {
return nullptr;
}
v8::CppHeapPointerTag cpp_heap_pointer_tag =
static_cast<v8::CppHeapPointerTag>(tag);
auto* base = v8::Object::Unwrap<WrappableBase>(
isolate, obj, {cpp_heap_pointer_tag, cpp_heap_pointer_tag});
if (!base) {
return nullptr;
}
return base->GetNamedPropertyInterceptor();
}
v8::Intercepted ObjectTemplateBuilder::NamedPropertyGetterImpl(
WrappablePointerTag tag,
v8::Local<v8::Name> property,
const v8::PropertyCallbackInfo<v8::Value>& info) {
v8::Isolate* isolate = info.GetIsolate();
NamedPropertyInterceptor* interceptor =
NamedInterceptorFromV8(isolate, info.HolderV2(), tag);
if (!interceptor) {
return v8::Intercepted::kNo;
}
std::string name;
ConvertFromV8(isolate, property, &name);
v8::Local<v8::Value> result = interceptor->GetNamedProperty(isolate, name);
if (!result.IsEmpty()) {
info.GetReturnValue().SetNonEmpty(result);
return v8::Intercepted::kYes;
}
return v8::Intercepted::kNo;
}
v8::Intercepted ObjectTemplateBuilder::NamedPropertySetterImpl(
WrappablePointerTag tag,
v8::Local<v8::Name> property,
v8::Local<v8::Value> value,
const v8::PropertyCallbackInfo<void>& info) {
v8::Isolate* isolate = info.GetIsolate();
NamedPropertyInterceptor* interceptor =
NamedInterceptorFromV8(isolate, info.HolderV2(), tag);
if (!interceptor) {
return v8::Intercepted::kNo;
}
std::string name;
ConvertFromV8(isolate, property, &name);
if (interceptor->SetNamedProperty(isolate, name, value)) {
return v8::Intercepted::kYes;
}
return v8::Intercepted::kNo;
}
v8::Intercepted ObjectTemplateBuilder::NamedPropertyQueryImpl(
WrappablePointerTag tag,
v8::Local<v8::Name> property,
const v8::PropertyCallbackInfo<v8::Integer>& info) {
v8::Isolate* isolate = info.GetIsolate();
NamedPropertyInterceptor* interceptor =
NamedInterceptorFromV8(isolate, info.HolderV2(), tag);
if (!interceptor) {
return v8::Intercepted::kNo;
}
std::string name;
ConvertFromV8(isolate, property, &name);
if (!interceptor->GetNamedProperty(isolate, name).IsEmpty()) {
info.GetReturnValue().Set(v8::None);
return v8::Intercepted::kYes;
}
return v8::Intercepted::kNo;
}
void ObjectTemplateBuilder::NamedPropertyEnumeratorImpl(
WrappablePointerTag tag,
const v8::PropertyCallbackInfo<v8::Array>& info) {
v8::Isolate* isolate = info.GetIsolate();
NamedPropertyInterceptor* interceptor =
NamedInterceptorFromV8(isolate, info.HolderV2(), tag);
if (!interceptor) {
return;
}
v8::Local<v8::Value> properties;
if (!TryConvertToV8(isolate, interceptor->EnumerateNamedProperties(isolate),
&properties)) {
return;
}
info.GetReturnValue().Set(v8::Local<v8::Array>::Cast(properties));
}
namespace {
void Constructor(const v8::FunctionCallbackInfo<v8::Value>& info) {
v8::Isolate* isolate = info.GetIsolate();
isolate->ThrowException(v8::Exception::Error(info.Data().As<v8::String>()));
}
} // namespace
ObjectTemplateBuilder::ObjectTemplateBuilder(v8::Isolate* isolate)
: ObjectTemplateBuilder(isolate, nullptr) {}
ObjectTemplateBuilder::ObjectTemplateBuilder(v8::Isolate* isolate,
const char* type_name)
: isolate_(isolate),
type_name_(type_name),
constructor_template_(v8::FunctionTemplate::New(
isolate,
&Constructor,
StringToV8(
isolate,
type_name
? base::StrCat({"Objects of type ", type_name,
" cannot be created using the constructor."})
: "Objects of this type cannot be created using the "
"constructor"))),
template_(constructor_template_->InstanceTemplate()) {
template_->SetInternalFieldCount(kNumberOfInternalFields);
}
ObjectTemplateBuilder::ObjectTemplateBuilder(
const ObjectTemplateBuilder& other) = default;
ObjectTemplateBuilder::~ObjectTemplateBuilder() = default;
ObjectTemplateBuilder& ObjectTemplateBuilder::SetImpl(
const std::string_view& name,
v8::Local<v8::Data> val) {
template_->Set(StringToSymbol(isolate_, name), val);
return *this;
}
ObjectTemplateBuilder& ObjectTemplateBuilder::SetImpl(v8::Local<v8::Name> name,
v8::Local<v8::Data> val) {
template_->Set(name, val);
return *this;
}
ObjectTemplateBuilder& ObjectTemplateBuilder::SetPropertyImpl(
const std::string_view& name,
v8::Local<v8::FunctionTemplate> getter,
v8::Local<v8::FunctionTemplate> setter) {
template_->SetAccessorProperty(StringToSymbol(isolate_, name), getter,
setter);
return *this;
}
ObjectTemplateBuilder& ObjectTemplateBuilder::SetLazyDataPropertyImpl(
const std::string_view& name,
v8::AccessorNameGetterCallback callback,
v8::Local<v8::Value> data) {
template_->SetLazyDataProperty(StringToSymbol(isolate_, name), callback,
data);
return *this;
}
v8::Local<v8::ObjectTemplate> ObjectTemplateBuilder::Build() {
v8::Local<v8::ObjectTemplate> result = template_;
template_.Clear();
constructor_template_.Clear();
return result;
}
} // namespace gin
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