extensions/renderer/v8_context_native_handler.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "extensions/renderer/v8_context_native_handler.h"
   6
   7 #include "base/bind.h"
   8 #include "extensions/common/features/feature.h"
   9 #include "extensions/renderer/dispatcher.h"
  10 #include "extensions/renderer/script_context.h"
  11
  12 namespace extensions {
  13
  14 V8ContextNativeHandler::V8ContextNativeHandler(ScriptContext* context,
  15                                                Dispatcher* dispatcher)
  16     : ObjectBackedNativeHandler(context),
  17       context_(context),
  18       dispatcher_(dispatcher) {
  19   RouteFunction("GetAvailability",
  20                 base::Bind(&V8ContextNativeHandler::GetAvailability,
  21                            base::Unretained(this)));
  22   RouteFunction("GetModuleSystem",
  23                 base::Bind(&V8ContextNativeHandler::GetModuleSystem,
  24                            base::Unretained(this)));
  25   RouteFunction(
  26       "RunWithNativesEnabledModuleSystem",
  27       base::Bind(&V8ContextNativeHandler::RunWithNativesEnabledModuleSystem,
  28                  base::Unretained(this)));
  29 }
  30
  31 void V8ContextNativeHandler::GetAvailability(
  32     const v8::FunctionCallbackInfo<v8::Value>& args) {
  33   CHECK_EQ(args.Length(), 1);
  34   v8::Isolate* isolate = args.GetIsolate();
  35   std::string api_name = *v8::String::Utf8Value(args[0]);
  36   Feature::Availability availability = context_->GetAvailability(api_name);
  37
  38   v8::Handle<v8::Object> ret = v8::Object::New(isolate);
  39   ret->Set(v8::String::NewFromUtf8(isolate, "is_available"),
  40            v8::Boolean::New(isolate, availability.is_available()));
  41   ret->Set(v8::String::NewFromUtf8(isolate, "message"),
  42            v8::String::NewFromUtf8(isolate, availability.message().c_str()));
  43   ret->Set(v8::String::NewFromUtf8(isolate, "result"),
  44            v8::Integer::New(isolate, availability.result()));
  45   args.GetReturnValue().Set(ret);
  46 }
  47
  48 void V8ContextNativeHandler::GetModuleSystem(
  49     const v8::FunctionCallbackInfo<v8::Value>& args) {
  50   CHECK_EQ(args.Length(), 1);
  51   CHECK(args[0]->IsObject());
  52   v8::Handle<v8::Context> v8_context =
  53       v8::Handle<v8::Object>::Cast(args[0])->CreationContext();
  54   ScriptContext* context =
  55       dispatcher_->script_context_set().GetByV8Context(v8_context);
  56   args.GetReturnValue().Set(context->module_system()->NewInstance());
  57 }
  58
  59 void V8ContextNativeHandler::RunWithNativesEnabledModuleSystem(
  60     const v8::FunctionCallbackInfo<v8::Value>& args) {
  61   CHECK_EQ(args.Length(), 1);
  62   CHECK(args[0]->IsFunction());
  63   v8::Handle<v8::Value> call_with_args[] = {
  64     context()->module_system()->NewInstance()
  65   };
  66   ModuleSystem::NativesEnabledScope natives_enabled(context()->module_system());
  67   context()->CallFunction(
  68       v8::Handle<v8::Function>::Cast(args[0]), 1, call_with_args);
  69 }
  70
  71 }  // namespace extensions