I used to have a script that I bound to right-click instead of xdg-open. In addition to opening URLs, it also extracted the current directory from xterm's title

I used to have a script that I bound to right-click instead of xdg-open. In addition to opening URLs, it also extracted the current directory from xterm's title so that I could open files with the mouse as well. I called it plumb (after the Plan 9 tool). Unfortunately I lost the script and am not interested in rewriting it, but maybe it gives you some ideas. You could dispatch any action you want based on patterns in the selection.