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// Copyright (c) 2011 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 "content/renderer/v8_value_converter_impl.h"
#include <string>
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/values.h"
#include "v8/include/v8.h"
namespace content {
V8ValueConverter* V8ValueConverter::create() {
return new V8ValueConverterImpl();
}
}
V8ValueConverterImpl::V8ValueConverterImpl()
: allow_undefined_(false),
allow_date_(false),
allow_regexp_(false) {
}
v8::Handle<v8::Value> V8ValueConverterImpl::ToV8Value(
const Value* value, v8::Handle<v8::Context> context) const {
v8::Context::Scope context_scope(context);
v8::HandleScope handle_scope;
return handle_scope.Close(ToV8ValueImpl(value));
}
Value* V8ValueConverterImpl::FromV8Value(
v8::Handle<v8::Value> val,
v8::Handle<v8::Context> context) const {
v8::Context::Scope context_scope(context);
v8::HandleScope handle_scope;
return FromV8ValueImpl(val);
}
v8::Handle<v8::Value> V8ValueConverterImpl::ToV8ValueImpl(
const Value* value) const {
CHECK(value);
switch (value->GetType()) {
case Value::TYPE_NULL:
return v8::Null();
case Value::TYPE_BOOLEAN: {
bool val = false;
CHECK(value->GetAsBoolean(&val));
return v8::Boolean::New(val);
}
case Value::TYPE_INTEGER: {
int val = 0;
CHECK(value->GetAsInteger(&val));
return v8::Integer::New(val);
}
case Value::TYPE_DOUBLE: {
double val = 0.0;
CHECK(value->GetAsDouble(&val));
return v8::Number::New(val);
}
case Value::TYPE_STRING: {
std::string val;
CHECK(value->GetAsString(&val));
return v8::String::New(val.c_str(), val.length());
}
case Value::TYPE_LIST:
return ToV8Array(static_cast<const ListValue*>(value));
case Value::TYPE_DICTIONARY:
return ToV8Object(static_cast<const DictionaryValue*>(value));
default:
LOG(ERROR) << "Unexpected value type: " << value->GetType();
return v8::Null();
}
}
v8::Handle<v8::Value> V8ValueConverterImpl::ToV8Array(
const ListValue* val) const {
v8::Handle<v8::Array> result(v8::Array::New(val->GetSize()));
for (size_t i = 0; i < val->GetSize(); ++i) {
Value* child = NULL;
CHECK(val->Get(i, &child));
v8::Handle<v8::Value> child_v8 = ToV8ValueImpl(child);
CHECK(!child_v8.IsEmpty());
v8::TryCatch try_catch;
result->Set(static_cast<uint32>(i), child_v8);
if (try_catch.HasCaught())
LOG(ERROR) << "Setter for index " << i << " threw an exception.";
}
return result;
}
v8::Handle<v8::Value> V8ValueConverterImpl::ToV8Object(
const DictionaryValue* val) const {
v8::Handle<v8::Object> result(v8::Object::New());
for (DictionaryValue::key_iterator iter = val->begin_keys();
iter != val->end_keys(); ++iter) {
Value* child = NULL;
CHECK(val->GetWithoutPathExpansion(*iter, &child));
const std::string& key = *iter;
v8::Handle<v8::Value> child_v8 = ToV8ValueImpl(child);
CHECK(!child_v8.IsEmpty());
v8::TryCatch try_catch;
result->Set(v8::String::New(key.c_str(), key.length()), child_v8);
if (try_catch.HasCaught()) {
LOG(ERROR) << "Setter for property " << key.c_str() << " threw an "
<< "exception.";
}
}
return result;
}
Value* V8ValueConverterImpl::FromV8ValueImpl(v8::Handle<v8::Value> val) const {
CHECK(!val.IsEmpty());
if (val->IsNull())
return Value::CreateNullValue();
if (val->IsBoolean())
return Value::CreateBooleanValue(val->ToBoolean()->Value());
if (val->IsInt32())
return Value::CreateIntegerValue(val->ToInt32()->Value());
if (val->IsNumber())
return Value::CreateDoubleValue(val->ToNumber()->Value());
if (val->IsString()) {
v8::String::Utf8Value utf8(val->ToString());
return Value::CreateStringValue(std::string(*utf8, utf8.length()));
}
if (allow_undefined_ && val->IsUndefined())
return Value::CreateNullValue();
if (allow_date_ && val->IsDate()) {
v8::Date* date = v8::Date::Cast(*val);
return Value::CreateDoubleValue(date->NumberValue() / 1000.0);
}
if (allow_regexp_ && val->IsRegExp()) {
return Value::CreateStringValue(
*v8::String::Utf8Value(val->ToString()));
}
// v8::Value doesn't have a ToArray() method for some reason.
if (val->IsArray())
return FromV8Array(val.As<v8::Array>());
if (val->IsObject())
return FromV8Object(val->ToObject());
LOG(ERROR) << "Unexpected v8 value type encountered.";
return Value::CreateNullValue();
}
ListValue* V8ValueConverterImpl::FromV8Array(v8::Handle<v8::Array> val) const {
ListValue* result = new ListValue();
for (uint32 i = 0; i < val->Length(); ++i) {
v8::TryCatch try_catch;
v8::Handle<v8::Value> child_v8 = val->Get(i);
if (try_catch.HasCaught()) {
LOG(ERROR) << "Getter for index " << i << " threw an exception.";
child_v8 = v8::Null();
}
// TODO(aa): It would be nice to support getters, but we need
// http://code.google.com/p/v8/issues/detail?id=1342 to do it properly.
if (!val->HasRealIndexedProperty(i))
continue;
Value* child = FromV8ValueImpl(child_v8);
CHECK(child);
result->Append(child);
}
return result;
}
DictionaryValue* V8ValueConverterImpl::FromV8Object(
v8::Handle<v8::Object> val) const {
DictionaryValue* result = new DictionaryValue();
v8::Handle<v8::Array> property_names(val->GetPropertyNames());
for (uint32 i = 0; i < property_names->Length(); ++i) {
v8::Handle<v8::String> name(property_names->Get(i).As<v8::String>());
// TODO(aa): It would be nice to support getters, but we need
// http://code.google.com/p/v8/issues/detail?id=1342 to do it properly.
if (!val->HasRealNamedProperty(name))
continue;
v8::String::Utf8Value name_utf8(name->ToString());
v8::TryCatch try_catch;
v8::Handle<v8::Value> child_v8 = val->Get(name);
if (try_catch.HasCaught()) {
LOG(ERROR) << "Getter for property " << *name_utf8
<< " threw an exception.";
child_v8 = v8::Null();
}
Value* child = FromV8ValueImpl(child_v8);
CHECK(child);
result->SetWithoutPathExpansion(std::string(*name_utf8, name_utf8.length()),
child);
}
return result;
}
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