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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gin/arguments.h"
#include "base/strings/stringprintf.h"
#include "gin/converter.h"
#include "v8/include/v8-exception.h"
#include "v8/include/v8-isolate.h"
#include "v8/include/v8-object.h"
#include "v8/include/v8-template.h"
namespace gin {
Arguments::Arguments()
: isolate_(nullptr), info_for_function_(nullptr), is_for_property_(false) {}
Arguments::Arguments(const v8::FunctionCallbackInfo<v8::Value>& info)
: isolate_(info.GetIsolate()),
info_for_function_(&info),
is_for_property_(false) {}
Arguments::Arguments(const v8::PropertyCallbackInfo<v8::Value>& info)
: isolate_(info.GetIsolate()),
info_for_property_(&info),
is_for_property_(true) {}
Arguments::~Arguments() = default;
v8::Local<v8::Value> Arguments::PeekNext() const {
if (is_for_property_)
return v8::Local<v8::Value>();
if (next_ >= info_for_function_->Length())
return v8::Local<v8::Value>();
return (*info_for_function_)[next_];
}
v8::LocalVector<v8::Value> Arguments::GetAll() const {
v8::LocalVector<v8::Value> result(isolate_);
if (is_for_property_)
return result;
int length = info_for_function_->Length();
if (length == 0)
return result;
result.reserve(length);
for (int i = 0; i < length; ++i)
result.push_back((*info_for_function_)[i]);
return result;
}
v8::Local<v8::Context> Arguments::GetHolderCreationContext() const {
v8::Local<v8::Object> holder = is_for_property_
? info_for_property_->HolderV2()
: info_for_function_->This();
return holder->GetCreationContextChecked(isolate_);
}
std::string V8TypeAsString(v8::Isolate* isolate, v8::Local<v8::Value> value) {
if (value.IsEmpty())
return "<empty handle>";
if (value->IsUndefined())
return "undefined";
if (value->IsNull())
return "null";
std::string result;
if (!ConvertFromV8(isolate, value, &result))
return std::string();
return result;
}
void Arguments::ThrowError() const {
if (is_for_property_)
return ThrowTypeError("Error processing property accessor arguments.");
if (insufficient_arguments_)
return ThrowTypeError("Insufficient number of arguments.");
v8::Local<v8::Value> value = (*info_for_function_)[next_ - 1];
return ThrowTypeError(base::StringPrintf(
"Error processing argument at index %d, conversion failure from %s",
next_ - 1, V8TypeAsString(isolate_, value).c_str()));
}
void Arguments::ThrowTypeError(const std::string& message) const {
isolate_->ThrowException(v8::Exception::TypeError(
StringToV8(isolate_, message)));
}
bool Arguments::IsConstructCall() const {
return !is_for_property_ && info_for_function_->IsConstructCall();
}
} // namespace gin
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