blob: 234cf53502f943a9a2dbf03b2c2e65fc2693c370 [file] [log] [blame]
// Copyright 2013 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 "gin/converter.h"
#include "gin/gin_export.h"
namespace gin {
// Arguments is a wrapper around v8::FunctionCallbackInfo that integrates
// with Converter to make it easier to marshall arguments and return values
// between V8 and C++.
class GIN_EXPORT Arguments {
explicit Arguments(const v8::FunctionCallbackInfo<v8::Value>& info);
template <typename T>
bool GetHolder(T* out) const {
return ConvertFromV8(isolate_, info_->Holder(), out);
template<typename T>
bool GetData(T* out) {
return ConvertFromV8(isolate_, info_->Data(), out);
template<typename T>
bool GetNext(T* out) {
if (next_ >= info_->Length()) {
insufficient_arguments_ = true;
return false;
v8::Local<v8::Value> val = (*info_)[next_++];
return ConvertFromV8(isolate_, val, out);
template<typename T>
bool GetRemaining(std::vector<T>* out) {
if (next_ >= info_->Length()) {
insufficient_arguments_ = true;
return false;
int remaining = info_->Length() - next_;
for (int i = 0; i < remaining; ++i) {
v8::Local<v8::Value> val = (*info_)[next_++];
if (!ConvertFromV8(isolate_, val, &out->at(i)))
return false;
return true;
bool Skip() {
if (next_ >= info_->Length())
return false;
return true;
int Length() const {
return info_->Length();
template<typename T>
void Return(T val) {
v8::Local<v8::Value> v8_value;
if (!TryConvertToV8(isolate_, val, &v8_value))
// Returns the creation context of the Holder.
v8::Local<v8::Context> GetHolderCreationContext() const;
// Always check the return value whether the handle is empty before
// dereferencing the handle.
v8::Local<v8::Value> PeekNext() const;
// Returns all arguments. Since this doesn't require any conversion, it
// cannot fail. This does not rely on or modify the current position in the
// array used by Get/PeekNext().
std::vector<v8::Local<v8::Value>> GetAll() const;
void ThrowError() const;
void ThrowTypeError(const std::string& message) const;
v8::Isolate* isolate() const { return isolate_; }
// Allows the function handler to distinguish between normal invocation
// and object construction.
bool IsConstructCall() const;
v8::Isolate* isolate_;
const v8::FunctionCallbackInfo<v8::Value>* info_;
int next_;
bool insufficient_arguments_;
} // namespace gin
#endif // GIN_ARGUMENTS_H_