void diagramIO_DiagramFileAdded(object sender, DiagramFileAddedEventArgs e)
{
Task.Factory.StartNew(async() =>
{
// Make sure a preview doesn't already exist for the file and make sure the current directory still matches.
bool previewExists = PreviewDiagrams.Select(pd => pd.Diagram.File).Contains(e.NewDiagramFile, FileComparer);
if (!previewExists && e.NewDiagramFile.Directory?.FullName.Trim('\\') == DiagramLocation.FullName.Trim('\\'))
{
var newlyAddedDiagram = await _diagramIO.ReadAsync(e.NewDiagramFile);
if (newlyAddedDiagram != null)
{
PreviewDiagrams.Add(_previewDiagramFactory(newlyAddedDiagram));
}
}
}, CancellationToken.None, TaskCreationOptions.None, _uiScheduler);
}
public DesignTimeDiagramExplorer()
{
DiagramLocation = GetDesignTimeDiagramPath();
foreach (var diagramFile in DiagramLocation.EnumerateFiles("*.puml"))
{
var imagePath = Path.Combine(diagramFile.DirectoryName, Path.GetFileNameWithoutExtension(diagramFile.Name) + ".png");
PreviewDiagrams.Add(
new PreviewDiagramViewModel(
new Diagram
{
Content = File.ReadAllText(diagramFile.FullName),
File = diagramFile,
ImageFile = new FileInfo(imagePath)
})
{
ImagePreview = BitmapFrame.Create(new Uri(imagePath))
});
}
}
private async Task AddNewDiagramAsync(Uri newDiagramUri)
{
string newFilePath = newDiagramUri.LocalPath;
if (String.IsNullOrEmpty(Path.GetExtension(newFilePath)))
{
newFilePath += FileExtension;
}
var newDiagram = new Diagram
{
File = new FileInfo(newFilePath),
Content = String.Format(NewDiagramTemplate, Path.GetFileNameWithoutExtension(newFilePath) + ".png")
};
_diagramLocation.Value = new DirectoryInfo(Path.GetDirectoryName(newFilePath));
var progress = _notifications.StartProgress(false);
try
{
await _diagramIO.SaveAsync(newDiagram, false);
var refreshedDiagram = await _diagramIO.ReadAsync(newDiagram.File);
var preview = PreviewDiagrams.SingleOrDefault(p => FileComparer.Equals(p.Diagram.File, refreshedDiagram.File));
if (preview == null)
{
preview = _previewDiagramFactory(refreshedDiagram);
PreviewDiagrams.Add(preview);
}
CurrentPreviewDiagram = preview;
OnOpenPreviewRequested(preview);
progress.Report(ProgressUpdate.Completed(string.Empty));
}
catch (Exception e)
{
progress.Report(ProgressUpdate.Failed(e));
}
}
private async Task LoadDiagramsAsync(DirectoryInfo directory)
{
PreviewDiagrams.Clear();
if (directory == null || !directory.Exists)
{
return;
}
using (var cts = new CancellationTokenSource())
{
IsLoadingDiagrams = true;
var progress = _notifications.StartProgress();
progress.Report(new ProgressUpdate {
PercentComplete = 0, Message = Resources.Progress_LoadingDiagrams
});
CancelLoadDiagramsCommand = new CancelTaskCommand(cts);
// Capture diagrams as they are read for a more responsive UI.
var readProgress = new Progress <ReadDiagramsProgress>(p =>
p.Diagram.Apply(d => PreviewDiagrams.Add(_previewDiagramFactory(d))));
// Report progress to UI by passing up progress data.
progress.Wrap(readProgress, p => new ProgressUpdate
{
PercentComplete = (int?)(p.ProcessedDiagramCount / (double)p.TotalDiagramCount * 100),
Message = String.Format(Resources.Progress_LoadingFile, p.ProcessedDiagramCount, p.TotalDiagramCount)
});
try
{
await _diagramIO.ReadDiagramsAsync(directory, readProgress, cts.Token);
progress.Report(ProgressUpdate.Completed(Resources.Progress_DiagramsLoaded));
}
catch (OperationCanceledException)
{
progress.Report(ProgressUpdate.Completed(Resources.Progress_DiagramLoadCanceled));
}
catch (Exception e)
{
progress.Report(ProgressUpdate.Failed(e));
}
finally
{
CancelLoadDiagramsCommand = null;
IsLoadingDiagrams = false;
}
}
}