1 // Copyright 2013 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.
5 #ifndef GIN_ARGUMENTS_H_
6 #define GIN_ARGUMENTS_H_
8 #include "base/basictypes.h"
9 #include "gin/converter.h"
10 #include "gin/gin_export.h"
14 // Arguments is a wrapper around v8::FunctionCallbackInfo that integrates
15 // with Converter to make it easier to marshall arguments and return values
16 // between V8 and C++.
17 class GIN_EXPORT Arguments
{
20 explicit Arguments(const v8::FunctionCallbackInfo
<v8::Value
>& info
);
24 bool GetHolder(T
* out
) {
25 return ConvertFromV8(isolate_
, info_
->Holder(), out
);
29 bool GetData(T
* out
) {
30 return ConvertFromV8(isolate_
, info_
->Data(), out
);
34 bool GetNext(T
* out
) {
35 if (next_
>= info_
->Length()) {
36 insufficient_arguments_
= true;
39 v8::Handle
<v8::Value
> val
= (*info_
)[next_
++];
40 return ConvertFromV8(isolate_
, val
, out
);
44 bool GetRemaining(std::vector
<T
>* out
) {
45 if (next_
>= info_
->Length()) {
46 insufficient_arguments_
= true;
49 int remaining
= info_
->Length() - next_
;
50 out
->resize(remaining
);
51 for (int i
= 0; i
< remaining
; ++i
) {
52 v8::Handle
<v8::Value
> val
= (*info_
)[next_
++];
53 if (!ConvertFromV8(isolate_
, val
, &out
->at(i
)))
60 if (next_
>= info_
->Length())
67 return info_
->Length();
72 info_
->GetReturnValue().Set(ConvertToV8(isolate_
, val
));
75 v8::Handle
<v8::Value
> PeekNext() const;
77 void ThrowError() const;
78 void ThrowTypeError(const std::string
& message
) const;
80 v8::Isolate
* isolate() const { return isolate_
; }
82 // Allows the function handler to distinguish between normal invocation
83 // and object construction.
84 bool IsConstructCall() const;
87 v8::Isolate
* isolate_
;
88 const v8::FunctionCallbackInfo
<v8::Value
>* info_
;
90 bool insufficient_arguments_
;
95 #endif // GIN_ARGUMENTS_H_