public static PalasoImage GetImageFromClipboard()
{
// N.B.: PalasoImage does not handle .svg files
#if MONO
if (GtkContainsImage())
{
return(PalasoImage.FromImage(GtkGetImage()));
}
if (GtkContainsText())
{
//REVIEW: I can find no documentation on GtkClipboard. If ContainsText means we have a file
// path, then it would be better to do PalasoImage.FromFileRobustly(); on the file path
return(PalasoImage.FromImage(GtkGetImageFromText()));
}
return(null);
#else
var dataObject = Clipboard.GetDataObject();
if (dataObject == null)
{
return(null);
}
var textData = String.Empty;
if (dataObject.GetDataPresent(DataFormats.UnicodeText))
{
textData = dataObject.GetData(DataFormats.UnicodeText) as String;
}
if (Clipboard.ContainsImage())
{
PalasoImage plainImage = null;
try
{
plainImage = PalasoImage.FromImage(Clipboard.GetImage()); // this method won't copy any metadata
var haveFileUrl = !String.IsNullOrEmpty(textData) && RobustFile.Exists(textData);
// If we have an image on the clipboard, and we also have text that is a valid url to an image file,
// use the url to create a PalasoImage (which will pull in any metadata associated with the image too)
if (haveFileUrl)
{
var imageWithPathAndMaybeMetadata = PalasoImage.FromFileRobustly(textData);
plainImage.Dispose(); //important: don't do this until we've successfully created the imageWithPathAndMaybeMetadata
return(imageWithPathAndMaybeMetadata);
}
else
{
return(plainImage);
}
}
catch (Exception e)
{
Logger.WriteEvent("PortableClipboard.GetImageFromClipboard() failed with message " + e.Message);
return(plainImage); // at worst, we should return null; if FromFile() failed, we return an image
}
}
// the ContainsImage() returns false when copying an PNG from MS Word
// so here we explicitly ask for a PNG and see if we can convert it.
if (dataObject.GetDataPresent("PNG"))
{
var o = dataObject.GetData("PNG") as Stream;
try
{
return(PalasoImage.FromImage(Image.FromStream(o)));
}
catch (Exception)
{}
}
//People can do a "copy" from the WIndows Photo Viewer but what it puts on the clipboard is a path, not an image
if (dataObject.GetDataPresent(DataFormats.FileDrop))
{
//This line gets all the file paths that were selected in explorer
string[] files = dataObject.GetData(DataFormats.FileDrop) as string[];
if (files == null)
{
return(null);
}
foreach (var file in files.Where(f => RobustFile.Exists(f)))
{
try
{
return(PalasoImage.FromFileRobustly(file));
}
catch (Exception)
{}
}
return(null); //not an image
}
if (!Clipboard.ContainsText() || !RobustFile.Exists(Clipboard.GetText()))
{
return(null);
}
try
{
return(PalasoImage.FromImage(Image.FromStream(new FileStream(Clipboard.GetText(), FileMode.Open))));
}
catch (Exception)
{}
return(null);
#endif
}
