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// Copyright 2013 The Chromium Authors. All rights reserved.
// 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 "gin/interceptor.h"
#include "gin/per_isolate_data.h"
#include "gin/public/wrapper_info.h"
namespace gin {
namespace {
WrappableBase* WrappableFromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val) {
if (!val->IsObject())
return NULL;
v8::Local<v8::Object> obj = v8::Local<v8::Object>::Cast(val);
WrapperInfo* info = WrapperInfo::From(obj);
// If this fails, the object is not managed by Gin.
if (!info)
return NULL;
// We don't further validate the type of the object, but assume it's derived
// from WrappableBase. We look up the pointer in a global registry, to make
// sure it's actually pointed to a valid life object.
return static_cast<WrappableBase*>(
obj->GetAlignedPointerFromInternalField(kEncodedValueIndex));
}
NamedPropertyInterceptor* NamedInterceptorFromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val) {
WrappableBase* base = WrappableFromV8(isolate, val);
if (!base)
return NULL;
return PerIsolateData::From(isolate)->GetNamedPropertyInterceptor(base);
}
IndexedPropertyInterceptor* IndexedInterceptorFromV8(
v8::Isolate* isolate,
v8::Local<v8::Value> val) {
WrappableBase* base = WrappableFromV8(isolate, val);
if (!base)
return NULL;
return PerIsolateData::From(isolate)->GetIndexedPropertyInterceptor(base);
}
void NamedPropertyGetter(v8::Local<v8::String> property,
const v8::PropertyCallbackInfo<v8::Value>& info) {
v8::Isolate* isolate = info.GetIsolate();
NamedPropertyInterceptor* interceptor =
NamedInterceptorFromV8(isolate, info.Holder());
if (!interceptor)
return;
std::string name;
ConvertFromV8(isolate, property, &name);
info.GetReturnValue().Set(interceptor->GetNamedProperty(isolate, name));
}
void NamedPropertySetter(v8::Local<v8::String> property,
v8::Local<v8::Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
v8::Isolate* isolate = info.GetIsolate();
NamedPropertyInterceptor* interceptor =
NamedInterceptorFromV8(isolate, info.Holder());
if (!interceptor)
return;
std::string name;
ConvertFromV8(isolate, property, &name);
if (interceptor->SetNamedProperty(isolate, name, value))
info.GetReturnValue().Set(value);
}
void NamedPropertyQuery(v8::Local<v8::String> property,
const v8::PropertyCallbackInfo<v8::Integer>& info) {
v8::Isolate* isolate = info.GetIsolate();
NamedPropertyInterceptor* interceptor =
NamedInterceptorFromV8(isolate, info.Holder());
if (!interceptor)
return;
std::string name;
ConvertFromV8(isolate, property, &name);
if (interceptor->GetNamedProperty(isolate, name).IsEmpty())
return;
info.GetReturnValue().Set(0);
}
void NamedPropertyEnumerator(const v8::PropertyCallbackInfo<v8::Array>& info) {
v8::Isolate* isolate = info.GetIsolate();
NamedPropertyInterceptor* interceptor =
NamedInterceptorFromV8(isolate, info.Holder());
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));
}
void IndexedPropertyGetter(uint32_t index,
const v8::PropertyCallbackInfo<v8::Value>& info) {
v8::Isolate* isolate = info.GetIsolate();
IndexedPropertyInterceptor* interceptor =
IndexedInterceptorFromV8(isolate, info.Holder());
if (!interceptor)
return;
info.GetReturnValue().Set(interceptor->GetIndexedProperty(isolate, index));
}
void IndexedPropertySetter(uint32_t index,
v8::Local<v8::Value> value,
const v8::PropertyCallbackInfo<v8::Value>& info) {
v8::Isolate* isolate = info.GetIsolate();
IndexedPropertyInterceptor* interceptor =
IndexedInterceptorFromV8(isolate, info.Holder());
if (!interceptor)
return;
if (interceptor->SetIndexedProperty(isolate, index, value))
info.GetReturnValue().Set(value);
}
void IndexedPropertyEnumerator(
const v8::PropertyCallbackInfo<v8::Array>& info) {
v8::Isolate* isolate = info.GetIsolate();
IndexedPropertyInterceptor* interceptor =
IndexedInterceptorFromV8(isolate, info.Holder());
if (!interceptor)
return;
v8::Local<v8::Value> properties;
if (!TryConvertToV8(isolate, interceptor->EnumerateIndexedProperties(isolate),
&properties))
return;
info.GetReturnValue().Set(v8::Local<v8::Array>::Cast(properties));
}
} // namespace
ObjectTemplateBuilder::ObjectTemplateBuilder(v8::Isolate* isolate)
: isolate_(isolate), template_(v8::ObjectTemplate::New(isolate)) {
template_->SetInternalFieldCount(kNumberOfInternalFields);
}
ObjectTemplateBuilder::ObjectTemplateBuilder(
const ObjectTemplateBuilder& other) = default;
ObjectTemplateBuilder::~ObjectTemplateBuilder() {
}
ObjectTemplateBuilder& ObjectTemplateBuilder::AddNamedPropertyInterceptor() {
template_->SetNamedPropertyHandler(&NamedPropertyGetter,
&NamedPropertySetter,
&NamedPropertyQuery,
NULL,
&NamedPropertyEnumerator);
return *this;
}
ObjectTemplateBuilder& ObjectTemplateBuilder::AddIndexedPropertyInterceptor() {
template_->SetIndexedPropertyHandler(&IndexedPropertyGetter,
&IndexedPropertySetter,
NULL,
NULL,
&IndexedPropertyEnumerator);
return *this;
}
ObjectTemplateBuilder& ObjectTemplateBuilder::SetImpl(
const base::StringPiece& name, v8::Local<v8::Data> val) {
template_->Set(StringToSymbol(isolate_, name), val);
return *this;
}
ObjectTemplateBuilder& ObjectTemplateBuilder::SetPropertyImpl(
const base::StringPiece& name, v8::Local<v8::FunctionTemplate> getter,
v8::Local<v8::FunctionTemplate> setter) {
template_->SetAccessorProperty(StringToSymbol(isolate_, name), getter,
setter);
return *this;
}
v8::Local<v8::ObjectTemplate> ObjectTemplateBuilder::Build() {
v8::Local<v8::ObjectTemplate> result = template_;
template_.Clear();
return result;
}
} // namespace gin
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