We can now copy and paste images to and from X11. Text copying and
pasting works as well.
The NSPasteboard can contain TIFF or PICT images, and pbproxy will
translate to an image/png or image/jpeg request, and list those in the
TARGETS.
I added a description of the basic design at the top of x-selection.m.
I removed the request_data x_selection class struct. It's not needed.
(cherry picked from commit 4a8daf884694c9c420c45d427f1f84e608e7e48f)
Add TRACE() calls where appropriate to try to figure out why we are losing CLIPBOARD at times, after transferring PRIMARY to the NSPasteboard.
Use the new pbproxy_clipboard_to_pasteboard where appropriate.
(cherry picked from commit 40190675a6c1889cca3574e5d1a9c16ab74315a7)
George Peter Staplin
Jeremy Huddleston