Unable to have the reverse of Ctrl-O in Vim

Question

I want to have the reverse of

• Ctrl + O

to be

• Shift + Ctrl + O

The original reverse is

• Ctrl + I

How can you remap the reverse of CTRL + O in Vim to be Shift + CTRL + O ?

Answer 1

As shown in help under

:help C-o

the "reverse" of Ctrl + o is

Ctrl + i or Tab

Answer 2

Unfortunately Vim recognises Control-o and Control-O as synonyms.
There's some information here about why you can't map Control-Shift-o, but it doesn't look like it's possible.

I've upvoted Idigas answer, it's not that hard to remember Control-I.

Answer 3

Actually, if you use xterm , you can get around the terminal emulator limitations by remapping keys in your .Xresources file. Use a key sequence that you do not use anyway, for instance CM-7 (0x9f):

XTerm*vt100*translations: #override\n\
    Ctrl Shift <Key> O: string(0x9f)

Then do an xrdb -merge ~/.Xresources and map CM-7 to Ci in Vim.

Admittedly it's a hack, but it have helped me a lot. Check out my .Xresources for inspiration.

Answer 4

由于终端模拟器的限制， Vim将Ctrl + Shift + O视为Ctrl + O.