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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/renderer/chrome_setting.h"
#include "base/strings/stringprintf.h"
#include "base/values.h"
#include "extensions/renderer/bindings/api_binding_util.h"
#include "extensions/renderer/bindings/api_event_handler.h"
#include "extensions/renderer/bindings/api_invocation_errors.h"
#include "extensions/renderer/bindings/api_request_handler.h"
#include "extensions/renderer/bindings/api_signature.h"
#include "extensions/renderer/bindings/api_type_reference_map.h"
#include "extensions/renderer/bindings/binding_access_checker.h"
#include "gin/arguments.h"
#include "gin/handle.h"
#include "gin/object_template_builder.h"
#include "v8/include/v8-object.h"
namespace extensions {
v8::Local<v8::Object> ChromeSetting::Create(
v8::Isolate* isolate,
const std::string& property_name,
const base::Value::List* property_values,
APIRequestHandler* request_handler,
APIEventHandler* event_handler,
APITypeReferenceMap* type_refs,
const BindingAccessChecker* access_checker) {
CHECK_GE(property_values->size(), 2u);
CHECK((*property_values)[1u].is_dict());
const std::string& pref_name = (*property_values)[0u].GetString();
const base::Value::Dict& value_spec = (*property_values)[1u].GetDict();
gin::Handle<ChromeSetting> handle = gin::CreateHandle(
isolate, new ChromeSetting(request_handler, event_handler, type_refs,
access_checker, pref_name, value_spec));
return handle.ToV8().As<v8::Object>();
}
ChromeSetting::ChromeSetting(APIRequestHandler* request_handler,
APIEventHandler* event_handler,
const APITypeReferenceMap* type_refs,
const BindingAccessChecker* access_checker,
const std::string& pref_name,
const base::Value::Dict& set_value_spec)
: request_handler_(request_handler),
event_handler_(event_handler),
type_refs_(type_refs),
access_checker_(access_checker),
pref_name_(pref_name),
argument_spec_(ArgumentType::OBJECT) {
// The set() call takes an object { value: { type: <t> }, ... }, where <t>
// is the custom set() argument specified above by value_spec.
ArgumentSpec::PropertiesMap properties;
{
auto scope_spec = std::make_unique<ArgumentSpec>(ArgumentType::REF);
scope_spec->set_ref("types.ChromeSettingScope");
scope_spec->set_optional(true);
properties["scope"] = std::move(scope_spec);
}
properties["value"] = std::make_unique<ArgumentSpec>(set_value_spec);
argument_spec_.set_properties(std::move(properties));
}
ChromeSetting::~ChromeSetting() = default;
gin::WrapperInfo ChromeSetting::kWrapperInfo = {gin::kEmbedderNativeGin};
gin::ObjectTemplateBuilder ChromeSetting::GetObjectTemplateBuilder(
v8::Isolate* isolate) {
return Wrappable<ChromeSetting>::GetObjectTemplateBuilder(isolate)
.SetMethod("get", &ChromeSetting::Get)
.SetMethod("set", &ChromeSetting::Set)
.SetMethod("clear", &ChromeSetting::Clear)
.SetProperty("onChange", &ChromeSetting::GetOnChangeEvent);
}
const char* ChromeSetting::GetTypeName() {
return "ChromeSetting";
}
void ChromeSetting::Get(gin::Arguments* arguments) {
HandleFunction("get", arguments);
}
void ChromeSetting::Set(gin::Arguments* arguments) {
v8::Isolate* isolate = arguments->isolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> context = arguments->GetHolderCreationContext();
if (!binding::IsContextValidOrThrowError(context))
return;
v8::Local<v8::Value> value = arguments->PeekNext();
// The set schema included in the Schema object is generic, since it varies
// per-setting. However, this is only ever for a single setting, so we can
// enforce the types more thoroughly.
std::string error;
if (!value.IsEmpty() &&
!argument_spec_.ParseArgument(context, value, *type_refs_, nullptr,
nullptr, &error)) {
arguments->ThrowTypeError("Invalid invocation");
return;
}
HandleFunction("set", arguments);
}
void ChromeSetting::Clear(gin::Arguments* arguments) {
HandleFunction("clear", arguments);
}
v8::Local<v8::Value> ChromeSetting::GetOnChangeEvent(
gin::Arguments* arguments) {
v8::Isolate* isolate = arguments->isolate();
v8::Local<v8::Context> context = arguments->GetHolderCreationContext();
v8::Local<v8::Object> wrapper = GetWrapper(isolate).ToLocalChecked();
if (!binding::IsContextValidOrThrowError(context))
return v8::Undefined(isolate);
v8::Local<v8::Private> key = v8::Private::ForApi(
isolate, gin::StringToSymbol(isolate, "onChangeEvent"));
v8::Local<v8::Value> event;
if (!wrapper->GetPrivate(context, key).ToLocal(&event)) {
NOTREACHED();
return v8::Local<v8::Value>();
}
DCHECK(!event.IsEmpty());
if (event->IsUndefined()) {
bool supports_filters = false;
bool supports_lazy_listeners = true;
event = event_handler_->CreateEventInstance(
base::StringPrintf("types.ChromeSetting.%s.onChange",
pref_name_.c_str()),
supports_filters, supports_lazy_listeners, binding::kNoListenerMax,
true, context);
v8::Maybe<bool> set_result = wrapper->SetPrivate(context, key, event);
if (!set_result.IsJust() || !set_result.FromJust()) {
NOTREACHED();
return v8::Local<v8::Value>();
}
}
return event;
}
void ChromeSetting::HandleFunction(const std::string& method_name,
gin::Arguments* arguments) {
v8::Isolate* isolate = arguments->isolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> context = arguments->GetHolderCreationContext();
if (!binding::IsContextValidOrThrowError(context))
return;
v8::LocalVector<v8::Value> argument_list = arguments->GetAll();
std::string full_name = "types.ChromeSetting." + method_name;
if (!access_checker_->HasAccessOrThrowError(context, full_name))
return;
std::string error;
const APISignature* signature = type_refs_->GetTypeMethodSignature(full_name);
APISignature::JSONParseResult parse_result =
signature->ParseArgumentsToJSON(context, argument_list, *type_refs_);
if (!parse_result.succeeded()) {
arguments->ThrowTypeError(api_errors::InvocationError(
full_name, signature->GetExpectedSignature(), *parse_result.error));
return;
}
parse_result.arguments_list->Insert(parse_result.arguments_list->begin(),
base::Value(pref_name_));
v8::Local<v8::Promise> promise = request_handler_->StartRequest(
context, full_name, std::move(*parse_result.arguments_list),
parse_result.async_type, parse_result.callback, v8::Local<v8::Function>(),
binding::ResultModifierFunction());
if (!promise.IsEmpty())
arguments->Return(promise);
}
} // namespace extensions
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