Re: drop down box or something like it.

Hale, Paul wrote:
>>
>>   *alias !saveSetting !execute [!setEvar %1 
>> %2][!xtextSaveEvar @$settingsFile$@ @%1@ @%2@]
>>   *alias !stripPath   !execute [!xtextReplace @$settingsFile$@ @(^%1 
>> \=)(.*\\)(.*\..*\=)_@ @\1\3@]
>>   *alias !stripExtn   !execute [!xtextReplace @$settingsFile$@ @(^%1 
>> \=.*)(\..*\=)_@       @\1\=@]
>>
> 
> I have been trying to figure these lines out, and I am not having much
> luck with it. Let me try and get the regex on one line for ease of
> example.
> 
> StripPath
> @(^%1\=)(.*\\)(.*\..*\=)_@ @\1\3@
> The way I understand it, @ ... @ normal Textedit @=$ 
> () is for grouping
> ^%1 is saying that the argument happens at the beginning of the string
> \= means equals. Do you actually use Var=Value in your themevars? I just
> put a space in mine. Is that a problem?
> 
> Next group
> .*\\ is saying remove all \'s
> 
> Next group
> .*..*\= I have no idea. Actually, I have no idea past this point.
> 
> Can anyone enlighten me?

This is where you have to read the xtextedit docs, so as to know the 
escape codes specific to this module:

------------
Escape Codes

The backslash (\) character is used to mark an escape code.
The following are valid escape sequences:

\= Double quote (")
\^ Replaces with a bang (!)
\# Replaces with a dollar sign ($) (Useful for evars, for example 
\#litestepdir\# will become $litestepdir$)
\~ Semicolon (;)

\1 Ignored and used in !xTextReplace(All) for () matches (explained 
below also with \2, \3 ,...)

Any other use of backslash will be ignored unless it is used for a 
character used in regexps, such as * or \.
------------

So @(^%1 \=)(.*\\)(.*\..*\=)_@ breaks down to (using [] for delimiters 
here):

   1) Everything from start of line to first occurrence of [ "] is 
assigned to the first pattern; this is the evar name plus the space that 
separates it from the evar value. My evar values are *always* quoted - 
that's how xtextedit saves things, and any scripts I write maintain that 
convention.

   2) The second pattern captures any sequence of characters [.*] ending 
with a backslash [\]; this will be the "path".

   3) The third sequence captures a series of characters (the file name) 
[.*] followed by a dot [\.] followed by another series of characters 
(the extension) [.*] that ends with a quote [\=] and is then followed by 
the end of the line [_].

We write out the first and third patterns, tossing the second [@\1\3@], 
so that

   name "c:\path\more_path\filename.extension"

becomes

   name "filename.extension"

!stripextension does the same thing, only now we've assigned the 
filename to the first sequence we match (^%1 \=.*), %1 being the evar 
name we're modifying, and the extension to the second sequence, which is 
then discarded. We write out only the first pattern, then add a quote, 
as we lumped (and discarded) that with the extension [@\1\=@].

QED  =)


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