/// <summary>
/// Returns an image from the clipboard and capture exception
///
/// TODO: Deal with Image Transparency more reliably (DIB)
/// https://stackoverflow.com/questions/30727343/fast-converting-bitmap-to-bitmapsource-wpf
/// </summary>
/// <returns>Bitmap captured or null</returns>
public static Bitmap GetImage()
{
try
{
var dataObject = Clipboard.GetDataObject();
var formats = dataObject.GetFormats(true);
if (formats == null || formats.Length == 0)
{
return(null);
}
var first = formats[0];
foreach (var f in formats)
{
Debug.WriteLine(" - " + f.ToString());
}
if (formats.Contains("PNG"))
{
Debug.WriteLine("PNG");
using (MemoryStream ms = (MemoryStream)dataObject.GetData("PNG"))
{
ms.Position = 0;
return((Bitmap) new Bitmap(ms));
}
}
// Guess at Chromium and Moz Web Browsers which can just use WPF's formatting
else if (first == DataFormats.Bitmap || formats.Contains("text/_moz_htmlinfo"))
{
Debug.WriteLine("First == Bitmap");
BitmapSource src = null;
for (int i = 0; i < 5; i++)
{
try
{
// This is notoriously unreliable so retry multiple time if it fails
src = Clipboard.GetImage();
break;
}
catch
{
Thread.Sleep(10); // retry
}
}
if (src == null)
{
return(null);
}
return(WindowUtilities.BitmapSourceToBitmap(src));
}
else if (formats.Contains("System.Drawing.Bitmap")) // (first == DataFormats.Dib)
{
Debug.WriteLine("System.Drawing.Bitmap");
var bitmap = (Bitmap)dataObject.GetData("System.Drawing.Bitmap");
return(bitmap);
}
Debug.WriteLine("Fall through - WinForms");
return(System.Windows.Forms.Clipboard.GetImage() as Bitmap);
}
catch
{
return(null);
}
}
/// <summary>
/// Handle pasting and handle images
/// </summary>
public void PasteOperation()
{
if (Clipboard.ContainsImage())
{
string imagePath = null;
var bmpSource = Clipboard.GetImage();
using (var bitMap = WindowUtilities.BitmapSourceToBitmap(bmpSource))
{
imagePath = AddinManager.Current.RaiseOnSaveImage(bitMap);
}
if (!string.IsNullOrEmpty(imagePath))
{
SetSelection($"");
PreviewMarkdownCallback(); // force a preview refresh
return;
}
string initialFolder = null;
if (!string.IsNullOrEmpty(MarkdownDocument.Filename) && MarkdownDocument.Filename != "untitled")
{
initialFolder = Path.GetDirectoryName(MarkdownDocument.Filename);
}
var sd = new SaveFileDialog
{
Filter = "Image files (*.png;*.jpg;*.gif;)|*.png;*.jpg;*.jpeg;*.gif|All Files (*.*)|*.*",
FilterIndex = 1,
Title = "Save Image from Clipboard as",
InitialDirectory = initialFolder,
CheckFileExists = false,
OverwritePrompt = true,
CheckPathExists = true,
RestoreDirectory = true
};
var result = sd.ShowDialog();
if (result != null && result.Value)
{
imagePath = sd.FileName;
try
{
var ext = Path.GetExtension(imagePath)?.ToLower();
using (var fileStream = new FileStream(imagePath, FileMode.Create))
{
BitmapEncoder encoder = null;
if (ext == ".png")
{
encoder = new PngBitmapEncoder();
}
else if (ext == ".jpg" || ext == ".jpeg")
{
encoder = new JpegBitmapEncoder();
}
else if (ext == ".gif")
{
encoder = new GifBitmapEncoder();
}
encoder.Frames.Add(BitmapFrame.Create(bmpSource));
encoder.Save(fileStream);
}
}
catch (Exception ex)
{
MessageBox.Show("Couldn't copy file to new location: \r\n" + ex.Message, mmApp.ApplicationName);
return;
}
string relPath = Path.GetDirectoryName(sd.FileName);
if (initialFolder != null)
{
try
{
relPath = FileUtils.GetRelativePath(sd.FileName, initialFolder);
}
catch (Exception ex)
{
mmApp.Log($"Failed to get relative path.\r\nFile: {sd.FileName}, Path: {imagePath}", ex);
}
if (!relPath.StartsWith("..\\"))
{
imagePath = relPath;
}
}
if (imagePath.Contains(":\\"))
{
imagePath = "file:///" + imagePath;
}
SetSelection($"");
PreviewMarkdownCallback(); // force a preview refresh
}
}
else if (Clipboard.ContainsText())
{
// just paste as is at cursor or selection
SetSelection(Clipboard.GetText());
}
}