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Re: [PATCH] Enhanced hotkey handling for menuentry

From: Andreas Vogel
Subject: Re: [PATCH] Enhanced hotkey handling for menuentry
Date: Sun, 04 Mar 2012 13:23:43 +0100
User-agent: Mozilla/5.0 (Windows NT 5.1; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2

Am 03.03.2012 22:30, schrieb Andreas Vogel:
>>>          - new static function parse_key()
>>>          - hotkey aliases are now case insensitive
>>>          - additional hotkey aliases
>> All added aliases conflict with normal function of these keys (arrows
>> and pages)
> Yes, I know. But it doesn't harm anyway and it might be useful to have
> the code already in case the use of the keys change in the future.
> Anyway, if you insist of leaving them out i'll obey.
Thought about it again: when being now able to use modifiers ALT, CTRL
and SHIFT, using the keys which have a already defined function (like
arrows and pages) doesn't conflict. Even though e.g. KEY_UP is already
used in menu I would like to be able to use SHIFT-UP as a hotkey. So in
my opinion the hotkey parse function should handle all possible keys.

>>>          - handling now<SHIFT>  and<CTRL>  modifiers for hotkeys
>> Could you change to the emacs notation?
> What is the emacs notation? I have no idea.
I did a search and from what I've seen I assume you mean to use the
    - "C-" for CTRL
    - "A-" for ALT (even though emacs seems to use "M-" for ALT on most
    - "S-" for SHIFT (emacs doesn't seem to have any notion for SHIFT,
but here we would need it)
Using this notion valid hotkeys could be e.g. "C-F1", "C-S-F1" and
"C-A-S-F1". The order of the modifiers are not significant so "C-A-S-F1"
== "S-A-C-F1".
Any comments? Please advise.

>> Shift flag isn't valid with alphanumeric keys.
> Ah, ok. Am I right that it's enough just not to set the SHIFT mask in
> case isalnum() is true?
Right now I don't fully understand the way GRUB key handling works in
detail regarding modifiers.
Form what I've learned until now it seems to be like this:
    - all alphanumeric keys never have the SHIFT modifier set
    - all keys having a #define GRUB_TERM_KEY_* all modifiers (CTRL,
ALT, SHIFT) are possible
    - I'm not sure about GRUB_TER_BACKSPACE, GRUB_TERM_TAB and
GRUB_TERM_ESC. What modifiers are allowed for them?

BTW about using isalnum(): couldn't find any GRUB replacement. Is it
save to include <ctype.h> and use those functions?

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