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// Copyright (c) 2012 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 "chrome/renderer/extensions/object_backed_native_handler.h"
#include "base/logging.h"
#include "base/memory/linked_ptr.h"
#include "chrome/renderer/extensions/console.h"
#include "chrome/renderer/extensions/module_system.h"
#include "v8/include/v8.h"
namespace extensions {
namespace {
// Key for the base::Bound routed function.
const char* kHandlerFunction = "handler_function";
} // namespace
ObjectBackedNativeHandler::ObjectBackedNativeHandler(
v8::Handle<v8::Context> context)
: v8_context_(context),
object_template_(v8::ObjectTemplate::New()) {
}
ObjectBackedNativeHandler::~ObjectBackedNativeHandler() {
Invalidate();
}
v8::Handle<v8::Object> ObjectBackedNativeHandler::NewInstance() {
return object_template_->NewInstance();
}
// static
v8::Handle<v8::Value> ObjectBackedNativeHandler::Router(
const v8::Arguments& args) {
v8::HandleScope handle_scope;
v8::Handle<v8::Object> data = args.Data().As<v8::Object>();
v8::Handle<v8::Value> handler_function_value =
data->Get(v8::String::New(kHandlerFunction));
// See comment in header file for why we do this.
if (handler_function_value.IsEmpty() ||
handler_function_value->IsUndefined()) {
console::Error(v8::Context::GetCalling(),
"Extension view no longer exists");
return v8::Undefined();
}
DCHECK(handler_function_value->IsExternal());
return handle_scope.Close(static_cast<HandlerFunction*>(
handler_function_value.As<v8::External>()->Value())->Run(args));
}
void ObjectBackedNativeHandler::RouteFunction(
const std::string& name,
const HandlerFunction& handler_function) {
v8::HandleScope handle_scope;
v8::Context::Scope context_scope(v8_context_.get());
v8::Persistent<v8::Object> data = v8::Persistent<v8::Object>::New(
v8_context_->GetIsolate(), v8::Object::New());
data->Set(v8::String::New(kHandlerFunction),
v8::External::New(new HandlerFunction(handler_function)));
router_data_.push_back(data);
v8::Handle<v8::FunctionTemplate> function_template =
v8::FunctionTemplate::New(Router, data);
object_template_->Set(name.c_str(), function_template);
}
void ObjectBackedNativeHandler::Invalidate() {
if (!is_valid())
return;
v8::HandleScope handle_scope;
v8::Context::Scope context_scope(v8_context_.get());
for (RouterData::iterator it = router_data_.begin();
it != router_data_.end(); ++it) {
v8::Persistent<v8::Object> data = *it;
v8::Handle<v8::Value> handler_function_value =
data->Get(v8::String::New(kHandlerFunction));
CHECK(!handler_function_value.IsEmpty());
delete static_cast<HandlerFunction*>(
handler_function_value.As<v8::External>()->Value());
data->Delete(v8::String::New(kHandlerFunction));
data.Dispose(v8_context_->GetIsolate());
}
object_template_.reset();
v8_context_.reset();
NativeHandler::Invalidate();
}
} // extensions
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