Cosmos/source2/VSIP/Cosmos.VS.XSharp/FileGenerator.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.VisualStudio.Shell.Interop;
using Microsoft.VisualStudio;
using System.Runtime.InteropServices;
using System.IO;

namespace Cosmos.VS.XSharp {

  // This is the custom tool used to compile .XS files to .CS files in VS
  public class FileGenerator : IVsSingleFileGenerator {
    public int DefaultExtension(out string pbstrDefaultExtension) {
      pbstrDefaultExtension = ".cs";
      return VSConstants.S_OK;
    }

    public int Generate(string wszInputFilePath, string bstrInputFileContents, string wszDefaultNamespace, IntPtr[] rgbOutputFileContents,
        out uint pcbOutput, IVsGeneratorProgress pGenerateProgress) {
      var xGeneratedCode = DoGenerate(wszInputFilePath, bstrInputFileContents, wszDefaultNamespace);
      var xBytes = Encoding.UTF8.GetBytes(xGeneratedCode);

      if (xBytes.Length > 0) {
        rgbOutputFileContents[0] = Marshal.AllocCoTaskMem(xBytes.Length);
        Marshal.Copy(xBytes, 0, rgbOutputFileContents[0], xBytes.Length);
        pcbOutput = (uint)xBytes.Length;
      } else {
        rgbOutputFileContents[0] = IntPtr.Zero;
        pcbOutput = 0;
      }
      return VSConstants.S_OK;
    }

    private static string DoGenerate(string inputFileName, string inputFileContents, string defaultNamespace) {
      using (var xInput = new StringReader(inputFileContents)) {
        using (var xOut = new StringWriter()) {
          Cosmos.Compiler.XSharp.Generator.Execute(xInput, inputFileName, xOut, defaultNamespace);
          return xOut.ToString();
        }
      }
    }
  }
}