Since we are running short of keys, it may be the time to add those
fancy compound keybindings (as with emacs, C-x r s a => Register Store
A).
What are those anyway? They are just very short *minibuffer commands*
(think alt-x rsa).
Se maybe we should just define one key that evokes minibuffer, parses
the input and forwards the command to appropriate handler. Let's say
it was ctrl+Q (q for "quick"). To store something in register a, you
type ctrl+q rsa ENTER. We probably should attempt skipping ENTER if
the command is complete already (e.g. by analysing the current entry
on every keystroke in that minibuffer).
Emacs often uses ctrl+x and ctrl+c, but we should avoid those because
they are standard CUA keys for cut & copy.
The minibuffer entry analysis can be thought as simple state machine.
entering ctrl+q puts it in state "init", r in state "r", "s" in state
"rs". "rs" is annotated with ('register-store', "LETTER_ARG_NEEDED"),
which will eat up the next character and invoke register_store(char).
We can probably skip the state machine theory for the most parts
though.
Command binding could be declared with:
'ri' : ('register-insert', ("LETTER_ARG_NEEDED",)
'rk' : ('rectangle-kill', )
'fs' : ('file-save', ("FILENAME_NEEDED",)
This state map easily allows us to analyze when we are ready to accept
arguments. We can also easily show 'register-insert: enter letter' in
statusbar.
--
Ville M. Vainio
http://tinyurl.com/vainio
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