An AppleScript that opens a new tab in the current directory with the current settings

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new_tab_current_directory_and_settings.scpt
AppleScript
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(*
This script opens a new Terminal.app tab in the directory of the current tab with the same settings. You’ll need to, if you haven’t already, enable access for assistive devices as described here: http://www.macosxautomation.com/applescript/uiscripting/index.html
 
It’s almost all the work of two scripts put together, thank you to them:
 
Chris Johnsen’s script opens a new tab in the current directory: http://superuser.com/questions/61149/os-x-terminal-app-how-to-start-a-new-tab-in-the-same-directory-as-the-current-ta/61264#61264
 
Jacob Rus’s “menu_click” lets me create the tab with the same settings, as Terminal’s API doesn’t: http://hints.macworld.com/article.php?story=20060921045743404
 
If you change the name of a Terminal profile, the AppleScript API returns the old name until you restart the application, so the script won’t work on renamed settings until then. Ugh. Also, the necessity of activating Terminal to execute the menu command brings all the terminal windows to the front.
*)
 
-- from http://hints.macworld.com/article.php?story=20060921045743404
-- `menu_click`, by Jacob Rus, September 2006
--
-- Accepts a list of form: `{"Finder", "View", "Arrange By", "Date"}`
-- Execute the specified menu item. In this case, assuming the Finder
-- is the active application, arranging the frontmost folder by date.
 
on menu_click(mList)
local appName, topMenu, r
-- Validate our input
if mList's length < 3 then error "Menu list is not long enough"
-- Set these variables for clarity and brevity later on
set {appName, topMenu} to (items 1 through 2 of mList)
set r to (items 3 through (mList's length) of mList)
-- This overly-long line calls the menu_recurse function with
-- two arguments: r, and a reference to the top-level menu
tell application "System Events" to my menu_click_recurse(r, ((process appName)'s ¬
(menu bar 1)'s (menu bar item topMenu)'s (menu topMenu)))
end menu_click
 
on menu_click_recurse(mList, parentObject)
local f, r
-- `f` = first item, `r` = rest of items
set f to item 1 of mList
if mList's length > 1 then set r to (items 2 through (mList's length) of mList)
-- either actually click the menu item, or recurse again
tell application "System Events"
if mList's length is 1 then
click parentObject's menu item f
else
my menu_click_recurse(r, (parentObject's (menu item f)'s (menu f)))
end if
end tell
end menu_click_recurse
 
 
 
-- with the noted slight modification, from http://superuser.com/questions/61149/os-x-terminal-app-how-to-start-a-new-tab-in-the-same-directory-as-the-current-ta/61264#61264
 
on run
(* Find the tty. *)
-- This is ugly. But is seems to work on Tiger. Maybe newer releases can do better.
tell application "Terminal"
set w to the front window
tell w
set origName to name
set title displays device name to not title displays device name
set newName to name
set title displays device name to not title displays device name
end tell
end tell
set tty to extractTTY(origName, newName)
if tty is "" then
display dialog "Could not find the tty for of the current Terminal window." buttons "Cancel" cancel button "Cancel" default button "Cancel"
end if
(* Find the PIDs of the processes in the foreground process group on that tty. *)
set pids to paragraphs of (do shell script "
ps -o pid,tty,tpgid,pgid,state,command |
awk '
BEGIN {t=ARGV[1];ARGC=1}
$2==t && $3==$4 {print $1}
' " & quoted form of tty)
if pids is {} or pids is {""} then
display dialog "Could not find the processes for " & tty & "." buttons "Cancel" cancel button "Cancel" default button "Cancel"
end if
(* Find the unique cwds of those processes. *)
set text item delimiters to {","}
set lsof to do shell script "lsof -F 0n -a -d cwd -p " & quoted form of (pids as Unicode text) without altering line endings
set text item delimiters to {(ASCII character 0) & (ASCII character 10)}
set cwds to {}
repeat with lsofItem in text items of lsof
if lsofItem starts with "n" then
set cwd to text 2 through end of lsofItem
if cwds does not contain cwd then ¬
set end of cwds to cwd
end if
end repeat
if cwds is {} then
display dialog "No cwds found!?" buttons "Cancel" cancel button "Cancel" default button "Cancel"
end if
if length of cwds is greater than 1 then
set cwds to choose from list cwds with title "Multiple Distinct CWDs" with prompt "Choose the directory to use:" without multiple selections allowed and empty selection allowed
if cwds is false then error number -128 -- cancel
end if
(* Open a new Terminal. *)
-- Here is where I substituted the menu_click call to use the current settings
tell application "Terminal"
activate
tell window 1
set settings to name of current settings in selected tab
end tell
end tell
menu_click({"Terminal", "Shell", "New Tab", settings})
tell application "Terminal" to do script "cd " & quoted form of item 1 of cwds in selected tab of window 1
end run
 
to extractTTY(a, b)
set str to textLeftAfterRemovingMatchingHeadAndTail(a, b)
set offs to offset of "tty" in str
if offs > 0 then
return text offs through (offs + 6) of str
end if
return ""
end extractTTY
to textLeftAfterRemovingMatchingHeadAndTail(big, little)
set text item delimiters to space
if class of big is not list then set big to text items of big
if class of little is not list then set little to text items of little
set {maxLen, minLen} to {length of big, length of little}
if maxLen < minLen then ¬
set {big, little, maxLen, minLen} to {little, big, minLen, maxLen}
set start to missing value
repeat with i from 1 to minLen
if item i of big is not equal to item i of little then
set start to i
exit repeat
end if
end repeat
if start is missing value then
if maxLen is equal to minLen then
return ""
else
return items (minLen + 1) through end of big as Unicode text
end if
end if
set finish to missing value
repeat with i from -1 to -minLen by -1
if item i of big is not equal to item i of little then
set finish to i
exit repeat
end if
end repeat
if finish is missing value then set finish to -(minLen + 1)
return items start through finish of big as Unicode text
end textLeftAfterRemovingMatchingHeadAndTail

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