A text editor which allows configuration of text to select when it is double clicked

Question

From my experience, most text editors will, when double clicking a block of text, break the selected text by dashed lines but not for underscores.

E.g:

Double click the word 'text' of this sentence with underscores:

this_text_block

Double click the word 'text' of this sentence with dashes:

this-text-block

However, in different situations I have different needs. For example, when swapping between serverside code, html and javascript I often would like to vary the way text is selected.

Is there a text editor that allows such a distinction? Possibly one that switches depending on the type of code I am writing?