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vi-mode plugin

This plugin increase vi-like zsh functionality.

To use it, add vi-mode to the plugins array in your zshrc file:

plugins=(... vi-mode)

Settings

VI_MODE_RESET_PROMPT_ON_MODE_CHANGE: controls whether the prompt is redrawn when switching to a different input mode. If this is unset, the mode indicator will not be updated when changing to a different mode. Set it to true to enable it. For example:
```
VI_MODE_RESET_PROMPT_ON_MODE_CHANGE=true
```
The default value is unset, unless vi_mode_prompt_info is used, in which case it'll automatically be set to true.
VI_MODE_SET_CURSOR: controls whether the cursor style is changed when switching to a different input mode. Set it to true to enable it (default: unset):
```
VI_MODE_SET_CURSOR=true
```
MODE_INDICATOR: controls the string displayed when the shell is in normal mode. See Mode indicator for details.

Mode indicator

Normal mode is indicated with a red <<< mark at the right prompt, when it hasn't been defined by theme.

You can change this indicator by setting the MODE_INDICATOR variable. This setting supports Prompt Expansion sequences. For example:

MODE_INDICATOR="%F{yellow}+%f"

You can also use the vi_mode_prompt_info function in your prompt, which will display this mode indicator.

Key bindings

Use ESC or CTRL-[ to enter Normal mode.

NOTE: some of these key bindings are set by zsh by default when using a vi-mode keymap.

History

ctrl-p : Previous command in history
ctrl-n : Next command in history
/ : Search backward in history
n : Repeat the last /

Vim edition

vv : Edit current command line in Vim

NOTE: this used to be bound to v. That is now the default (visual-mode)

Movement

$ : To the end of the line
^ : To the first non-blank character of the line
0 : To the first character of the line
w : [count] words forward
W : [count] WORDS forward
e : Forward to the end of word [count] inclusive
E : Forward to the end of WORD [count] inclusive
b : [count] words backward
B : [count] WORDS backward
t{char} : Till before [count]'th occurrence of {char} to the right
T{char} : Till before [count]'th occurrence of {char} to the left
f{char} : To [count]'th occurrence of {char} to the right
F{char} : To [count]'th occurrence of {char} to the left
; : Repeat latest f, t, F or T [count] times
, : Repeat latest f, t, F or T in opposite direction

Insertion

i : Insert text before the cursor
I : Insert text before the first character in the line
a : Append text after the cursor
A : Append text at the end of the line
o : Insert new command line below the current one
O : Insert new command line above the current one

Delete and Insert

ctrl-h : While in Insert mode: delete character before the cursor
ctrl-w : While in Insert mode: delete word before the cursor
d{motion} : Delete text that {motion} moves over
dd : Delete line
D : Delete characters under the cursor until the end of the line
c{motion} : Delete {motion} text and start insert
cc : Delete line and start insert
C : Delete to the end of the line and start insert
r{char} : Replace the character under the cursor with {char}
R : Enter replace mode: Each character replaces existing one
x : Delete count characters under and after the cursor
X : Delete count characters before the cursor