@Mad-Rheeza ,
The User Defined Lanauge (UDL) system is not that powerful on its own.
If you use the EnhanceAnyLexer plugin, you can use a regular expression to define it.
But good luck in coming up with a regex that can distinguish between two similar (or identical) sets of text which mean two different things:
I want to rename c:\path\filename as blah.txt
I want to rename c:\path\filename as blah.txt
In the first instance, it’s really implying “I want to rename c:\path\filename as blah.txt” to mean a single filename with spaces. The second is really implying “I want to rename c:\path\filename as blah.txt”
And by “good luck”, I meant, “that’s an impossible task, without caveats”.
If you have the caveat of “each line that starts with a drive letter then a colon then forward-or-backward-slash is a single filename, which may or may not include spaces, all the way to the end of the line”, then it’s easy. Something like ^[A-Z]:[\\/].*?$ will handle that.
Or if you defined that all filenames with spaces must have double-quotes around (like the cmd.exe prompt and Windows > Run dialog require), then it’s also not too bad: Something like [A-Z]:[/\\]\S+|"[A-Z]:[/\\].+?" might work (the left half of the alternation before the | is for filenames without spaces, and the right half is for filenames in quotes, which might contain spaces.
Or if you always have a three-letter extension, then [A-Z]:[/\\].*\.[A-Za-z]{3} would likely work.