api.cc.svn-base

Google浏览器V8内核代码

  i::Handle<i::CallHandlerInfo> obj =
      i::Handle<i::CallHandlerInfo>::cast(struct_obj);
  obj->set_callback(*FromCData(callback));
  if (data.IsEmpty()) data = v8::Undefined();
  obj->set_data(*Utils::OpenHandle(*data));
  Utils::OpenHandle(this)->set_instance_call_handler(*obj);
}


// --- O b j e c t T e m p l a t e ---


Local<ObjectTemplate> ObjectTemplate::New() {
  return New(Local<FunctionTemplate>());
}


Local<ObjectTemplate> ObjectTemplate::New(
      v8::Handle<FunctionTemplate> constructor) {
  if (IsDeadCheck("v8::ObjectTemplate::New()")) return Local<ObjectTemplate>();
  EnsureInitialized("v8::ObjectTemplate::New()");
  LOG_API("ObjectTemplate::New");
  i::Handle<i::Struct> struct_obj =
      i::Factory::NewStruct(i::OBJECT_TEMPLATE_INFO_TYPE);
  i::Handle<i::ObjectTemplateInfo> obj =
      i::Handle<i::ObjectTemplateInfo>::cast(struct_obj);
  InitializeTemplate(obj, Consts::OBJECT_TEMPLATE);
  if (!constructor.IsEmpty())
    obj->set_constructor(*Utils::OpenHandle(*constructor));
  obj->set_internal_field_count(i::Smi::FromInt(0));
  return Utils::ToLocal(obj);
}


// Ensure that the object template has a constructor.  If no
// constructor is available we create one.
static void EnsureConstructor(ObjectTemplate* object_template) {
  if (Utils::OpenHandle(object_template)->constructor()->IsUndefined()) {
    Local<FunctionTemplate> templ = FunctionTemplate::New();
    i::Handle<i::FunctionTemplateInfo> constructor = Utils::OpenHandle(*templ);
    constructor->set_instance_template(*Utils::OpenHandle(object_template));
    Utils::OpenHandle(object_template)->set_constructor(*constructor);
  }
}


void ObjectTemplate::SetAccessor(v8::Handle<String> name,
                                 AccessorGetter getter,
                                 AccessorSetter setter,
                                 v8::Handle<Value> data,
                                 AccessControl settings,
                                 PropertyAttribute attribute) {
  if (IsDeadCheck("v8::ObjectTemplate::SetAccessor()")) return;
  HandleScope scope;
  EnsureConstructor(this);
  i::FunctionTemplateInfo* constructor =
      i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
  i::Handle<i::FunctionTemplateInfo> cons(constructor);
  Utils::ToLocal(cons)->AddInstancePropertyAccessor(name,
                                                    getter,
                                                    setter,
                                                    data,
                                                    settings,
                                                    attribute);
}


void ObjectTemplate::SetNamedPropertyHandler(NamedPropertyGetter getter,
                                             NamedPropertySetter setter,
                                             NamedPropertyQuery query,
                                             NamedPropertyDeleter remover,
                                             NamedPropertyEnumerator enumerator,
                                             Handle<Value> data) {
  if (IsDeadCheck("v8::ObjectTemplate::SetNamedPropertyHandler()")) return;
  HandleScope scope;
  EnsureConstructor(this);
  i::FunctionTemplateInfo* constructor =
      i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
  i::Handle<i::FunctionTemplateInfo> cons(constructor);
  Utils::ToLocal(cons)->SetNamedInstancePropertyHandler(getter,
                                                        setter,
                                                        query,
                                                        remover,
                                                        enumerator,
                                                        data);
}


void ObjectTemplate::MarkAsUndetectable() {
  if (IsDeadCheck("v8::ObjectTemplate::MarkAsUndetectable()")) return;
  HandleScope scope;
  EnsureConstructor(this);
  i::FunctionTemplateInfo* constructor =
      i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
  i::Handle<i::FunctionTemplateInfo> cons(constructor);
  cons->set_undetectable(true);
}


void ObjectTemplate::SetAccessCheckCallbacks(
      NamedSecurityCallback named_callback,
      IndexedSecurityCallback indexed_callback,
      Handle<Value> data) {
  if (IsDeadCheck("v8::ObjectTemplate::SetAccessCheckCallbacks()")) return;
  HandleScope scope;
  EnsureConstructor(this);

  i::Handle<i::Struct> struct_info =
      i::Factory::NewStruct(i::ACCESS_CHECK_INFO_TYPE);
  i::Handle<i::AccessCheckInfo> info =
      i::Handle<i::AccessCheckInfo>::cast(struct_info);
  info->set_named_callback(*FromCData(named_callback));
  info->set_indexed_callback(*FromCData(indexed_callback));
  if (data.IsEmpty()) data = v8::Undefined();
  info->set_data(*Utils::OpenHandle(*data));

  i::FunctionTemplateInfo* constructor =
      i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
  i::Handle<i::FunctionTemplateInfo> cons(constructor);
  cons->set_needs_access_check(true);
  cons->set_access_check_info(*info);
}


void ObjectTemplate::SetIndexedPropertyHandler(
      IndexedPropertyGetter getter,
      IndexedPropertySetter setter,
      IndexedPropertyQuery query,
      IndexedPropertyDeleter remover,
      IndexedPropertyEnumerator enumerator,
      Handle<Value> data) {
  if (IsDeadCheck("v8::ObjectTemplate::SetIndexedPropertyHandler()")) return;
  HandleScope scope;
  EnsureConstructor(this);
  i::FunctionTemplateInfo* constructor =
      i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
  i::Handle<i::FunctionTemplateInfo> cons(constructor);
  Utils::ToLocal(cons)->SetIndexedInstancePropertyHandler(getter,
                                                          setter,
                                                          query,
                                                          remover,
                                                          enumerator,
                                                          data);
}


void ObjectTemplate::SetCallAsFunctionHandler(InvocationCallback callback,
                                              Handle<Value> data) {
  if (IsDeadCheck("v8::ObjectTemplate::SetCallAsFunctionHandler()")) return;
  HandleScope scope;
  EnsureConstructor(this);
  i::FunctionTemplateInfo* constructor =
      i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
  i::Handle<i::FunctionTemplateInfo> cons(constructor);
  Utils::ToLocal(cons)->SetInstanceCallAsFunctionHandler(callback, data);
}


int ObjectTemplate::InternalFieldCount() {
  if (IsDeadCheck("v8::ObjectTemplate::InternalFieldCount()")) {
    return 0;
  }
  return i::Smi::cast(Utils::OpenHandle(this)->internal_field_count())->value();
}


void ObjectTemplate::SetInternalFieldCount(int value) {
  if (IsDeadCheck("v8::ObjectTemplate::SetInternalFieldCount()")) return;
  if (!ApiCheck(i::Smi::IsValid(value),
                "v8::ObjectTemplate::SetInternalFieldCount()",
                "Invalid internal field count")) {
    return;
  }
  if (value > 0) {
    // The internal field count is set by the constructor function's
    // construct code, so we ensure that there is a constructor
    // function to do the setting.
    EnsureConstructor(this);
  }
  Utils::OpenHandle(this)->set_internal_field_count(i::Smi::FromInt(value));
}


// --- S c r i p t D a t a ---


ScriptData* ScriptData::PreCompile(const char* input, int length) {
  unibrow::Utf8InputBuffer<> buf(input, length);
  return i::PreParse(&buf, NULL);
}


ScriptData* ScriptData::New(unsigned* data, int length) {
  return new i::ScriptDataImpl(i::Vector<unsigned>(data, length));
}


// --- S c r i p t ---


Local<Script> Script::Compile(v8::Handle<String> source,
                              v8::ScriptOrigin* origin,
                              v8::ScriptData* script_data) {
  ON_BAILOUT("v8::Script::Compile()", return Local<Script>());
  LOG_API("Script::Compile");
  i::Handle<i::String> str = Utils::OpenHandle(*source);
  i::Handle<i::Object> name_obj;
  int line_offset = 0;
  int column_offset = 0;
  if (origin != NULL) {
    if (!origin->ResourceName().IsEmpty()) {
      name_obj = Utils::OpenHandle(*origin->ResourceName());
    }
    if (!origin->ResourceLineOffset().IsEmpty()) {
      line_offset = static_cast<int>(origin->ResourceLineOffset()->Value());
    }
    if (!origin->ResourceColumnOffset().IsEmpty()) {
      column_offset = static_cast<int>(origin->ResourceColumnOffset()->Value());
    }
  }
  EXCEPTION_PREAMBLE();
  i::ScriptDataImpl* pre_data = static_cast<i::ScriptDataImpl*>(script_data);
  // We assert that the pre-data is sane, even though we can actually
  // handle it if it turns out not to be in release mode.
  ASSERT(pre_data == NULL || pre_data->SanityCheck());
  // If the pre-data isn't sane we simply ignore it
  if (pre_data != NULL && !pre_data->SanityCheck())
    pre_data = NULL;
  i::Handle<i::JSFunction> boilerplate = i::Compiler::Compile(str,
                                                              name_obj,
                                                              line_offset,
                                                              column_offset,
                                                              NULL,
                                                              pre_data);
  has_pending_exception = boilerplate.is_null();
  EXCEPTION_BAILOUT_CHECK(Local<Script>());
  i::Handle<i::JSFunction> result =
      i::Factory::NewFunctionFromBoilerplate(boilerplate,
                                             i::Top::global_context());
  return Local<Script>(ToApi<Script>(result));
}


Local<Script> Script::Compile(v8::Handle<String> source,
                              v8::Handle<Value> file_name) {
  ScriptOrigin origin(file_name);
  return Compile(source, &origin);
}


Local<Value> Script::Run() {
  ON_BAILOUT("v8::Script::Run()", return Local<Value>());
  LOG_API("Script::Run");
  i::Object* raw_result = NULL;
  {
    HandleScope scope;
    i::Handle<i::JSFunction> fun = Utils::OpenHandle(this);
    EXCEPTION_PREAMBLE();
    i::Handle<i::Object> global(i::Top::context()->global());
    i::Handle<i::Object> result =
        i::Execution::Call(fun, global, 0, NULL, &has_pending_exception);
    EXCEPTION_BAILOUT_CHECK(Local<Value>());
    raw_result = *result;
  }
  i::Handle<i::Object> result(raw_result);
  return Utils::ToLocal(result);
}


// --- E x c e p t i o n s ---


v8::TryCatch::TryCatch()
    : next_(i::Top::try_catch_handler()),
      exception_(i::Heap::the_hole_value()),
      message_(i::Smi::FromInt(0)),
      is_verbose_(false),
      capture_message_(true) {
  i::Top::RegisterTryCatchHandler(this);
}


v8::TryCatch::~TryCatch() {
  i::Top::UnregisterTryCatchHandler(this);
}


bool v8::TryCatch::HasCaught() {
  return !reinterpret_cast<i::Object*>(exception_)->IsTheHole();
}


v8::Local<Value> v8::TryCatch::Exception() {
  if (HasCaught()) {
    // Check for out of memory exception.
    i::Object* exception = reinterpret_cast<i::Object*>(exception_);
    return v8::Utils::ToLocal(i::Handle<i::Object>(exception));
  } else {
    return v8::Local<Value>();
  }
}


v8::Local<v8::Message> v8::TryCatch::Message() {
  if (HasCaught() && message_ != i::Smi::FromInt(0)) {
    i::Object* message = reinterpret_cast<i::Object*>(message_);
    return v8::Utils::MessageToLocal(i::Handle<i::Object>(message));
  } else {
    return v8::Local<v8::Message>();
  }
}


void v8::TryCatch::Reset() {
  exception_ = i::Heap::the_hole_value();
  message_ = i::Smi::FromInt(0);
}


void v8::TryCatch::SetVerbose(bool value) {
  is_verbose_ = value;
}


void v8::TryCatch::SetCaptureMessage(bool value) {
  capture_message_ = value;
}


// --- M e s s a g e ---


Local<String> Message::Get() {
  ON_BAILOUT("v8::Message::Get()", return Local<String>());
  HandleScope scope;
  i::Handle<i::Object> obj = Utils::OpenHandle(this);
  i::Handle<i::String> raw_result = i::MessageHandler::GetMessage(obj);
  Local<String> result = Utils::ToLocal(raw_result);
  return scope.Close(result);
}


v8::Handle<String> Message::GetScriptResourceName() {
  if (IsDeadCheck("v8::Message::GetScriptResourceName()")) {
    return Local<String>();
  }
  HandleScope scope;
  i::Handle<i::JSObject> obj =
      i::Handle<i::JSObject>::cast(Utils::OpenHandle(this));
  // Return this.script.name.
  i::Handle<i::JSValue> script =
      i::Handle<i::JSValue>::cast(GetProperty(obj, "script"));
  i::Handle<i::Object> resource_name(i::Script::cast(script->value())->name());
  if (!resource_name->IsString()) {
    return Local<String>();
  }
  Local<String> result =
      Utils::ToLocal(i::Handle<i::String>::cast(resource_name));
  return scope.Close(result);
}


// TODO(1240903): Remove this when no longer used in WebKit V8 bindings.
Handle<Value> Message::GetSourceData() {
  Handle<String> data = GetScriptResourceName();
  if (data.IsEmpty()) return v8::Undefined();
  return data;
}

static i::Handle<i::Object> CallV8HeapFunction(const char* name,
                                               i::Handle<i::Object> recv,
                                               int argc,
                                               i::Object** argv[],
                                               bool* has_pending_exception) {
  i::Handle<i::String> fmt_str = i::Factory::LookupAsciiSymbol(name);
  i::Object* object_fun = i::Top::builtins()->GetProperty(*fmt_str);
  i::Handle<i::JSFunction> fun =
      i::Handle<i::JSFunction>(i::JSFunction::cast(object_fun));
  i::Handle<i::Object> value =
      i::Execution::Call(fun, recv, argc, argv, has_pending_exception);
  return value;
}


static i::Handle<i::Object> CallV8HeapFunction(const char* name,
                                               i::Handle<i::Object> data,
                                               bool* has_pending_exception) {
  i::Object** argv[1] = { data.location() };
  return CallV8HeapFunction(name,
                            i::Top::builtins(),
                            1,
                            argv,
                            has_pending_exception);
}


int Message::GetLineNumber() {
  ON_BAILOUT("v8::Message::GetLineNumber()", return -1);
  HandleScope scope;
  EXCEPTION_PREAMBLE();
  i::Handle<i::Object> result = CallV8HeapFunction("GetLineNumber",
                                                   Utils::OpenHandle(this),
                                                   &has_pending_exception);
  EXCEPTION_BAILOUT_CHECK(0);