I understand this concern. But it seems that it would be better to have an orthogonal implementation of this. The clipboard remains text-only. If you select an image or a file, it copies its absolute path (or url) into the clipboard. Then it is the responsibility of the destination program to interpret what to do with this text. If you paste the filename of an image into a plain text editor, you'll get the filename verbatim. If you paste it into an image editor, it opens and pastes the image in there. But from the point of view of the clipboard it's always just text (maybe with some textual markers).