[TxMt] Snippet Question: Insert given values of parameters with pull-down menu

[Hans-Jörg Bibiko]

Hi,

I have to write much XSL stuff. I use among others the snippet  
collection of Andreas Schöller (BTW thanks for that).
He was so kind to add information about the valid values of parameters.

example:
Snippet ou =>
<xsl:output
	name=""
	encoding="utf-8|ASCII|US-ASCII|iso-8859-1|utf8|KOI8R|cp1251"
	indent="no|yes"
	use-character-maps="mapping1 mapping2"
	method="text|html|xml|xhtml"
/>

As usual I can use TAB to jump to each ${n:} token.
Now my question:
Would it be possible to convert e.g. the token 'text|html|xml|xhtml'  
into a pull-down menu?

I tried it this way:
After pressing TAB TM highlights 'text|html|xml|xhtml'; I invoke a  
command:

`echo -en "$TM_SELECTED_TEXT" | ruby -e '
	require File.join(ENV["TM_SUPPORT_PATH"], "lib/dialog.rb")
	words = STDIN.read().split("|")
	print words[(Dialog.menu words)]
'`

and I can choose what I want. After that, of course, I cannot use TAB  
to navigate through the snippet any more, unfortunately.

I also tried a snippet like:

<xsl:output method="${1:`echo -en "text|html|xml|xhtml" | ruby -e '
	require File.join(ENV["TM_SUPPORT_PATH"], "lib/dialog.rb")
	words = STDIN.read().split("|")
	print words[(Dialog.menu words)]
'`}" encoding="${2:`echo -en "utf-8|ASCII|US-ASCII|iso-8859-1|utf8| 
KOI8R|cp1251" | ruby -e '
	require File.join(ENV["TM_SUPPORT_PATH"], "lib/dialog.rb")
	words = STDIN.read().split("|")
	print words[(Dialog.menu words)]
'`}"/>

In principal this works and the TAB behaviour isn't disturb but I  
have no visual feedback what I'm typing while the menus popping up  
and the TAB mechanism starts at token 1 which I already entered.

Would it cost much effort to implement such a behaviour? Meaning if I  
press TAB and within the new selection occurs a given delimiter (here  
| ) or tag or what ever that the snippet parser will show this  
selection as pull-down menu automatically without distroying the TAB  
mechanism.
And, would it make sense as a global snippet feature?


Regards,

Hans