[TxMt] Re: How to execute all lines before the cursor position?

[Steve King]

On 2011-04-20 02:18, Marius Hofert wrote:
> Dear textmate-experts,
>
> I use textmate to program in the statistical software R. To execute an R script, I typically first select the lines and then use "Apple-key + R" which launches "Send Selection/Document to ... R.app". In order to execute all lines before the current cursor position, I also first select all lines (with "Apple-key + shirt + up"). But that shifts the view to the top of the document, which is a bit tedious. Is there a simple way to tell textmate to execute all lines before the current cursor position?

I can think of a couple ways to do it.

The easiest way is with a macro. Start recording, jump to beginning of 
line, select to top, "Send selection to R.app", right arrow, stop 
recording.  Save the macro as you wish.  The key is the right-arrow 
action at the end, which will deselect everything and leave the cursor 
at the end of the selected area.  Two disadvantages: It does move your 
cursor to the beginning of the current line, and it moves the current 
line to the bottom of the window.

Better, and almost as easy, would be to modify the bundle command "Send 
Selection/Document to R.app", which is in the "R Console (R.app)" 
bundle. It's just a shell script which captures its stdin and uses 
AppleScript to send it to R.app.  This can be modified really easily to 
do what you want.  The line that captures the input is near the top: 
'rawText="`cat`"'  Change that to:

     rawText = "`head -$(($TM_LINE_NUMBER-1))`"

The $TM_LINE_NUMBER environment variable contains the number of the 
current line.  The $((... -1)) expression simply says to subtract one to 
get all lines *before* the cursor.  And the head command simply gets 
that many lines from stdin and discards the rest.

-- 
Steve King
Sr. Software Engineer
Arbor Networks
+1 734 821 1461
www.arbornetworks.com <http://www.arbornetworks.com/>