Parsing mode choice for separate parts of a core

Example:

Page -> textmode = html
Forums -> textmode = bbcode
Pm -> textmode = html
Comments -> textmode = bbcode
........

or:

Page -> textmode = html
Forums -> textmode = html
Pm -> textmode = html
Comments -> textmode = html
.......

or:

Page -> textmode = bbcode
Forums -> textmode = bbcode
Pm -> textmode = bbcode
Comments -> textmode = bbcode

and etc.

I.e. the set-up textmode with loading of the necessary editor.