Meta-tags

Meta-tags

[Wingot]

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Hey,

I'm trying to set Alt-h to be a backwards-delete-word, like in emacs, 
but can't figure out how to do this.

I have tried setting in .zshrc a line that says:
"bindkey '\M-h' backward-delete-word

But Alt-h still runs help on the currently typed command.

It almost appears as if Alt-H is hardwired to help as far as I can tell.

Regards,
Wingot


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Re: Meta-tags

[Andrey Borzenkov]

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On Saturday 12 May 2007, Wingot wrote:
> Hey,
>
> I'm trying to set Alt-h to be a backwards-delete-word, like in emacs,
> but can't figure out how to do this.
>
> I have tried setting in .zshrc a line that says:
> "bindkey '\M-h' backward-delete-word
>

\M means character with high bit added. It is quite unlikely that your 
terminal (emulator) actually produces this when you press Alt-H - I get 
ESC-H:

{pts/1}% xxd
^[h
0000000: 1b68 0a                                  .h.

and this is exactly what run-help is bound to:

{pts/1}% bindkey | grep run-help
"^[H" run-help
"^[h" run-help


So just check what run-help is bound to on your termnial and rebind this 
sequence.

Arguably zsh should treat \M-x and ESC-x interchangeably; I believe it even 
was the case once but my memory fails me here.

P.S. thank you for chance to look at it - this gives me the whole lot of new 
shortcuts to use :)

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Re: Meta-tags

[Peter Stephenson]

Andrey Borzenkov wrote:
> Arguably zsh should treat \M-x and ESC-x interchangeably; I believe it even
> was the case once but my memory fails me here.

I don't think they were ever explicitly tied together, although "bindkey
-m" sets up the default bindings for Meta as well as escape.

The problem nowadays is that the meta sequences clash with directly
entered multibyte characters (see recent postings, passim).  This
is not only the case with special keyboards; recent Xorg distributions
allow you to create accented characters with AltGr.  On my keyboard
AltGr [ a gaves a with diaeresis/Umlaut, for example.  This will appear
as to the shell as a multibyte key sequence with the top bit set, just
like a \M- key sequence.  Due to the potential problems, bindkey -m will
now print a warning.

That reminds me, too...anyone having problems with entering multibyte
characters directly should check bindkey -m isn't in effect.

-- 
Peter Stephenson <p.w.stephenson@ntlworld.com>
Web page now at http://homepage.ntlworld.com/p.w.stephenson/

Re: Meta-tags

[Bart Schaefer]

On May 12,  2:32pm, Andrey Borzenkov wrote:
}
} Arguably zsh should treat \M-x and ESC-x interchangeably; I believe it
} even was the case once but my memory fails me here.

It's never interchanged them, but the "bindkey -m" command initializes
all the \M- sequences to be the same as the ESC- sequences.  Nowadays
that also turns off multibyte support, so it's not as desirable.

Re: Meta-tags

[Andrey Borzenkov]

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On Saturday 12 May 2007, Peter Stephenson wrote:
> Andrey Borzenkov wrote:
> > Arguably zsh should treat \M-x and ESC-x interchangeably; I believe it
> > even was the case once but my memory fails me here.
>
> I don't think they were ever explicitly tied together, although "bindkey
> -m" sets up the default bindings for Meta as well as escape.
>

Ah, that probably is what I had in mind.

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Re: Meta-tags

[Andrey Borzenkov]

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On Saturday 12 May 2007, Bart Schaefer wrote:
> On May 12,  2:32pm, Andrey Borzenkov wrote:
> }
> } Arguably zsh should treat \M-x and ESC-x interchangeably; I believe it
> } even was the case once but my memory fails me here.
>
> It's never interchanged them, but the "bindkey -m" command initializes
> all the \M- sequences to be the same as the ESC- sequences.  Nowadays
> that also turns off multibyte support, so it's not as desirable.
>

zsh also adds those ESC mappings to default emacs keymap automatically BTW. 

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