Esempio n. 1
0
        public Drawing(Stream drawingContent, FileDetail fileDetail)
        {
            if (drawingContent == null)
            {
                throw new ArgumentNullException("drawingContent");
            }
            if (fileDetail == null)
            {
                throw new ArgumentNullException("fileDetail");
            }

            _drawingContent = drawingContent;
            _fileDetail     = fileDetail;
        }
        void IInitializeWithStream.Initialize(IStream pstream, uint grfMode)
        {
            try
            {
                if (_previewForm == null)
                {
                    return;
                }

                _previewForm.Reset();
                _fileDetail        = _GetPreviewFileDetail(pstream);
                _previewFileStream = pstream.ToStream().ToMemoryStream();
                Marshal.ReleaseComObject(pstream);
            }
            catch (Exception exc)
            {
                Trace.TraceError("PreviewHandlerController.Initialize: {0}", exc);
            }
        }
Esempio n. 3
0
        public void OnPreviewRequired(Stream stream, FileDetail fileDetail)
        {
            if (stream == null)
            {
                throw new ArgumentNullException("stream");
            }
            if (fileDetail == null)
            {
                throw new ArgumentNullException("fileDetail");
            }
            if (!stream.CanRead)
            {
                throw new ArgumentException("Stream must be readable", "stream");
            }

            TokenSource.Cancel();
            TokenSource    = new CancellationTokenSource();
            FileStream     = stream;
            FileDetail     = fileDetail;
            DisplayPreview = true;
            PreviewRequired?.Invoke(this, EventArgs.Empty);
        }
Esempio n. 4
0
        public async Task <GeneratePreviewResult> GeneratePreview(Stream drawingContent, FileDetail fileDetail, Size previewSize, CancellationToken token)
        {
            if (drawingContent == null)
            {
                throw new ArgumentNullException(nameof(drawingContent));
            }
            if (fileDetail == null)
            {
                throw new ArgumentNullException(nameof(fileDetail));
            }
            if (!drawingContent.CanRead)
            {
                throw new ArgumentException("Stream must be readable", nameof(drawingContent));
            }

            var process = new Process
            {
                StartInfo =
                {
                    FileName               = Path.Combine(_settings.DotApplicationPath),
                    RedirectStandardInput  = true,
                    RedirectStandardOutput = true,
                    RedirectStandardError  = true,
                    UseShellExecute        = false,
                    CreateNoWindow         = true,
                    Arguments              = "-T" + _settings.RenderingFormat.ToString().ToLower()
                },
                EnableRaisingEvents = true
            };

            process.Start();

            var baseOutputStream = process.StandardOutput.BaseStream;
            var baseErrorStream  = process.StandardError.BaseStream;

            var drawingStreamSansBom = _streamHelper.ExcludeBomFromStream(drawingContent);
            await drawingStreamSansBom.CopyToAsync(process.StandardInput.BaseStream);

            process.StandardInput.BaseStream.Close();

            var outputStream = new MemoryStream();

            baseOutputStream.CopyTo(outputStream);

            var errorStream = new MemoryStream();

            baseErrorStream.CopyTo(errorStream);

            process.WaitForExit();

            if (errorStream.Length > 0)
            {
                errorStream.Seek(0, SeekOrigin.Begin);
                var message = new StreamReader(errorStream).ReadToEnd();
                return(new GeneratePreviewResult(message));
            }

            if (process.ExitCode != 0)
            {
                return(new GeneratePreviewResult("Failed to render drawing: " + process.ExitCode));
            }

            outputStream.Seek(0, SeekOrigin.Begin);
            return(new GeneratePreviewResult(outputStream));
        }