(* Find out which editor is running. If both are running, it probably depends on which one was launched first (i.e. seemingly random) *)
tell application "System Events"
	try
		set callingEditor to 1st process whose name is "BBEdit"
	on error
		tell me to quit
	end try
	set appName to the name of callingEditor
end tell

(* Since BBEdit and TextWrangler use the same AppleEvents, we can get away with this. Of course AppleScript still needs to know what to emit. *)
tell application appName
	using terms from application "BBEdit"
		set numdocs to the number of every text document
		repeat with ii from 1 to numdocs
			if (modified of text document ii) then
				save text document ii
			end if
		end repeat
	end using terms from
end tell

(* If there are open documents, then "do your thing" *)
if numdocs > 0 then
	tell application appName
		using terms from application "BBEdit"
			set mypath to get file of active document of window 1
		end using terms from
	end tell
	set cmd to do shell script "/Users/chris/Library/TeXShop/bin/Sweave.sh " & (the quoted form of POSIX path of mypath)
	tell application "Terminal"
		set numterms to count windows
		if numterms > 0 then
			do script cmd in window 1
		else
			do script cmd
		end if
	end tell
end if