gin/arguments.cc

   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 #include "gin/arguments.h"
   6
   7 #include "base/strings/stringprintf.h"
   8 #include "gin/converter.h"
   9
  10 namespace gin {
  11
  12 Arguments::Arguments()
  13     : isolate_(NULL),
  14       info_(NULL),
  15       next_(0),
  16       insufficient_arguments_(false) {
  17 }
  18
  19 Arguments::Arguments(const v8::FunctionCallbackInfo<v8::Value>& info)
  20     : isolate_(info.GetIsolate()),
  21       info_(&info),
  22       next_(0),
  23       insufficient_arguments_(false) {
  24 }
  25
  26 Arguments::~Arguments() {
  27 }
  28
  29 v8::Handle<v8::Value> Arguments::PeekNext() {
  30   if (next_ >= info_->Length())
  31     return v8::Handle<v8::Value>();
  32   return (*info_)[next_];
  33 }
  34
  35 void Arguments::ThrowError() {
  36   if (insufficient_arguments_)
  37     return ThrowTypeError("Insufficient number of arguments.");
  38
  39   ThrowTypeError(base::StringPrintf(
  40       "Error processing argument %d.", next_ - 1));
  41 }
  42
  43 void Arguments::ThrowTypeError(const std::string& message) {
  44   isolate_->ThrowException(v8::Exception::TypeError(
  45       StringToV8(isolate_, message)));
  46 }
  47
  48 template<>
  49 bool Arguments::GetNext<Arguments>(Arguments* out) {
  50   *out = *this;
  51   return true;
  52 }
  53
  54 }  // namespace gin