oh-my-zsh/plugins/vi-mode/vi-mode.plugin.zsh

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# Ensures that $terminfo values are valid and updates editor information when
# the keymap changes.
function zle-keymap-select zle-line-init zle-line-finish {
# The terminal must be in application mode when ZLE is active for $terminfo
# values to be valid.
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if (( ${+terminfo[smkx]} )); then
printf '%s' ${terminfo[smkx]}
fi
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if (( ${+terminfo[rmkx]} )); then
printf '%s' ${terminfo[rmkx]}
fi
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zle reset-prompt
zle -R
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}
zle -N zle-line-init
zle -N zle-line-finish
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zle -N zle-keymap-select
bindkey -v
# if mode indicator wasn't setup by theme, define default
if [[ "$MODE_INDICATOR" == "" ]]; then
MODE_INDICATOR="%{$fg_bold[red]%}<%{$fg[red]%}<<%{$reset_color%}"
fi
function vi_mode_prompt_info() {
echo "${${KEYMAP/vicmd/$MODE_INDICATOR}/(main|viins)/}"
}
# define right prompt, if it wasn't defined by a theme
if [[ "$RPS1" == "" && "$RPROMPT" == "" ]]; then
RPS1='$(vi_mode_prompt_info)'
fi