NodeRtUtils.h

// Copyright (c) Microsoft Corporation
// All rights reserved. 
//
// Licensed under the Apache License, Version 2.0 (the ""License""); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 
//
// THIS CODE IS PROVIDED ON AN  *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABLITY OR NON-INFRINGEMENT. 
//
// See the Apache Version 2.0 License for specific language governing permissions and limitations under the License.

#pragma once 

#include <v8.h>
#include "nan.h"

#define WCHART_NOT_BUILTIN_IN_NODE 1

namespace NodeRT {
  namespace Utils {

    v8::Local<v8::Value> WinRtExceptionToJsError(Platform::Exception^ exception);

    void ThrowWinRtExceptionInJs(Platform::Exception^ exception);

    // creates an object with the following structure:
    // {
    //    "callback" : [callback function]
    //    "domain" : [the domain in which the async function/event was called/registered] (this is optional)
    // }
    v8::Local<v8::Object> CreateCallbackObjectInDomain(v8::Local<v8::Function> callback);

    // Calls the callback in the appropriate domwin, expects an object in the following format:
    // {
    //    "callback" : [callback fuction]
    //    "domain" : [the domain in which the async function/event was called/registered] (this is optional)
    // }
    v8::Local<v8::Value> CallCallbackInDomain(v8::Local<v8::Object> callbackObject, int argc, v8::Local<v8::Value> argv []);

    v8::Local<v8::String> NewString(const wchar_t* str);

    const wchar_t* StringToWchar(v8::String::Value& str);

    ::Platform::String^ V8StringToPlatformString(v8::Local<v8::Value> value);

#ifdef WCHART_NOT_BUILTIN_IN_NODE
    // compares 2 strings using a case insensitive comparison
    bool CaseInsenstiveEquals(const wchar_t* str1, const uint16_t* str2);
#endif

    // compares 2 strings using a case insensitive comparison
    bool CaseInsenstiveEquals(const wchar_t* str1, const wchar_t* str2);

    // registers the namespace & required object on the global object
    void RegisterNameSpace(const char* ns, v8::Local<v8::Value> nsExports);

    v8::Local<v8::Value> CreateExternalWinRTObject(const char* ns, const char* objectName, ::Platform::Object ^instance);

    bool IsWinRtWrapper(v8::Local<v8::Value> value);

    template<class T>
    bool IsWinRtWrapperOf(v8::Local<v8::Value> value)
    {
      if (!IsWinRtWrapper(value))
      {
        return false;
      }

      if (value->IsNull())
      {
        return true;
      }

      WrapperBase* wrapper = Nan::ObjectWrap::Unwrap<WrapperBase>(value.As<v8::Object>());

      if (wrapper->GetObjectInstance() == nullptr)
      {
        return false;
      }

      try
      {
        T instance = dynamic_cast<T>(wrapper->GetObjectInstance());
        return (instance != nullptr);
      }
      catch (...)
      {
        return false;
      }
    }

    ::Platform::Object^ GetObjectInstance(v8::Local<v8::Value>  value);

	void SetHiddenValue(v8::Local<v8::Object> obj, v8::Local<v8::String> symbol, v8::Local<v8::Primitive> data);
	void SetHiddenValueWithObject(v8::Local<v8::Object> obj, v8::Local<v8::String> symbol, v8::Local<v8::Object> data);
	v8::Local<v8::Value> GetHiddenValue(v8::Local<v8::Object> obj, v8::Local<v8::String> symbol);

    v8::Local<v8::Date> DateTimeToJS(::Windows::Foundation::DateTime value);
    ::Windows::Foundation::TimeSpan TimeSpanFromMilli(int64_t millis);
    ::Windows::Foundation::DateTime DateTimeFromJSDate(v8::Local<v8::Value> value);

    bool IsGuid(v8::Local<v8::Value> value);
    ::Platform::Guid GuidFromJs(v8::Local<v8::Value> value);
    v8::Local<v8::String> GuidToJs(::Platform::Guid guid);

    v8::Local<v8::Object> ColorToJs(::Windows::UI::Color color);
    ::Windows::UI::Color ColorFromJs(v8::Local<v8::Value> value);
    bool IsColor(v8::Local<v8::Value> value);

    v8::Local<v8::Object> RectToJs(::Windows::Foundation::Rect rect);
    ::Windows::Foundation::Rect RectFromJs(v8::Local<v8::Value> value);
    bool IsRect(v8::Local<v8::Value> value);

    v8::Local<v8::Object> PointToJs(::Windows::Foundation::Point point);
    ::Windows::Foundation::Point PointFromJs(v8::Local<v8::Value> value);
    bool IsPoint(v8::Local<v8::Value> value);

    v8::Local<v8::Object> SizeToJs(::Windows::Foundation::Size size);
    ::Windows::Foundation::Size SizeFromJs(v8::Local<v8::Value> value);
    bool IsSize(v8::Local<v8::Value> value);

    wchar_t GetFirstChar(v8::Local<v8::Value> value);
    v8::Local<v8::String> JsStringFromChar(wchar_t value);

    ::Windows::Foundation::HResult HResultFromJsInt32(int32_t value);

  }
}