gin/arguments.h

   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.
   4
   5 #ifndef GIN_ARGUMENTS_H_
   6 #define GIN_ARGUMENTS_H_
   7
   8 #include "base/basictypes.h"
   9 #include "gin/converter.h"
  10
  11 namespace gin {
  12
  13 class Arguments {
  14  public:
  15   explicit Arguments(const v8::FunctionCallbackInfo<v8::Value>& info);
  16   ~Arguments();
  17
  18   template<typename T>
  19   bool Holder(T* out) {
  20     return ConvertFromV8(info_.Holder(), out);
  21   }
  22
  23   template<typename T>
  24   bool GetNext(T* out) {
  25     if (next_ >= info_.Length()) {
  26       insufficient_arguments_ = true;
  27       return false;
  28     }
  29     v8::Handle<v8::Value> val = info_[next_++];
  30     return ConvertFromV8(val, out);
  31   }
  32
  33   template<typename T>
  34   void Return(T val) {
  35     info_.GetReturnValue().Set(ConvertToV8(isolate_, val));
  36   }
  37
  38   void ThrowError();
  39   void ThrowTypeError(const std::string& message);
  40
  41   v8::Isolate* isolate() const { return isolate_; }
  42
  43  private:
  44   v8::Isolate* isolate_;
  45   const v8::FunctionCallbackInfo<v8::Value>& info_;
  46   int next_;
  47   bool insufficient_arguments_;
  48
  49   DISALLOW_COPY_AND_ASSIGN(Arguments);
  50 };
  51
  52 }  // namespace gin
  53
  54 #endif  // GIN_ARGUMENTS_H_