Re: Using Alt in my keymaps and utf-8

On Wednesday, August 22, 2012 2:50:35 PM UTC-5, pabl...@gmail.com wrote:
> 2012/8/22 Chris Jones <cjns...@gmail.com>
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> On Wed, Aug 22, 2012 at 10:28:47AM EDT, Pablo Giménez wrote:
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> > I am using Vim with terminals Mrxvt in Linux and iTerm2 in the Mac.
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> > I have the same problem in Gvim as well.
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> [..]
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> Don't have access to either..
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> What happens if you use <Esc> instead of <M- or <A-
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> i.e.
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>   map <Esc>a :echo 'You hit Alt+A'<CR>
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>  Wow this seems to work!
> Why <Esc> is working?

Some terminals send ALT+t to Vim as an <Esc> character ^[ followed by t.

So mapping <Esc>t in these terminals will react to what the terminal sends for ALT+t, but will not be able to tell the difference between this an you actually pressing <Esc> followed by t.

I think it's possible to correct the problem in your terminal config, but I don't know much about that. Try these two tips:

http://vim.wikia.com/wiki/Fix_meta-keys_that_break_out_of_Insert_mode
http://vim.wikia.com/wiki/Get_Alt_key_to_work_in_terminal

And remember that <Esc>t probably won't work in gvim, although ALT+t works out-of-the-box.

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