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// 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.
#ifndef GIN_ARGUMENTS_H_
#define GIN_ARGUMENTS_H_
#include "base/basictypes.h"
#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 {
public:
Arguments();
explicit Arguments(const v8::FunctionCallbackInfo<v8::Value>& info);
~Arguments();
template<typename T>
bool GetHolder(T* out) {
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::Handle<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_;
out->resize(remaining);
for (int i = 0; i < remaining; ++i) {
v8::Handle<v8::Value> val = (*info_)[next_++];
if (!ConvertFromV8(isolate_, val, &out->at(i)))
return false;
}
return true;
}
bool Skip() {
if (next_ >= info_->Length())
return false;
next_++;
return true;
}
int Length() const {
return info_->Length();
}
template<typename T>
void Return(T val) {
info_->GetReturnValue().Set(ConvertToV8(isolate_, val));
}
v8::Handle<v8::Value> PeekNext() const;
void ThrowError() const;
void ThrowTypeError(const std::string& message) const;
v8::Isolate* isolate() const { return isolate_; }
private:
v8::Isolate* isolate_;
const v8::FunctionCallbackInfo<v8::Value>* info_;
int next_;
bool insufficient_arguments_;
};
} // namespace gin
#endif // GIN_ARGUMENTS_H_
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