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Written by Oleksandr Gavenko (AKA gavenkoa), compiled on 2017-01-30 from rev ccaa2f364422+.

Clipboard/selection

MS Windows

X Windows

X11 selection transfers (which both PRIMARY and CLIPBOARD are instances of) are done through synthesized X11 events and properties changes.

The messages used to transfer the selections have a maximum size that's actually quite low (a few kilobytes).

See

http://standards.freedesktop.org/clipboards-spec/clipboards-latest.txt http://www.jwz.org/doc/x-cut-and-paste.html http://en.wikipedia.org/wiki/X_Window_selection http://www.emacswiki.org/cgi-bin/wiki/CopyAndPaste

xclipboard

The xclipboard command emulates the traditional Macintosh style clipboard by claiming ownership of the CLIPBOARD selection and answering any requests for its value. When it loses the selection, it immediately asks the new owner for the value of the CLIPBOARD selection, makes a local copy, and then reasserts ownership of the CLIPBOARD. This way the clipboard contents can persist after the original application has exited.