Re: line folding

[Benno Schulenberg]

> > But what should M-[ do by default, when 
> > nothing is selected and the cursor is on a normal line?
>
> Perhaps the same thing as Alt+PageUp/Down does for anchors?
>
> If nothing is selected...
>
> * ...and no group of lines has been folded, display the message...
>      [ There are no folded lines; to fold lines, first select them ]

Hmm.  I don't like the idea of having to select something first,
but... maybe that is the best way because the most versatile: the
user can choose exactly what they want to fold.

> * ...and if lines have been folded, go to the next group of folded lines?

Oh!  That's interesting.  That way one could quickly unfold any
folded areas by repeatedly hitting M-[.  Nice.

> > I would expect M-[ to do some default 
> > folding action, for example: from the current line until the next blank line, 
> > or: when the cursor is somewhere in a block (delimited by blank lines), to 
> > fold that block...
>
> I'm afraid that might be terrifying for some users, watching their lines 
> "disappear" because they've pressed the wrong key.

Hmm...  Yes, maybe.  But... the folded lines will be replaced by a line
that says "folded xx lines", and they can be immediately unfolded again
with another M-[.  If the user does not know what key they hit, maybe
M-U should also undo a folding action?


Benno

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