fish-shell/doc_src/cmds/fish_mode_prompt.rst
Aaron Gyes af61ea1325 doc_src: Continue the slog through the letter F.
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2021-12-17 15:16:47 -08:00

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.. _cmd-fish_mode_prompt:
fish_mode_prompt - define the appearance of the mode indicator
==============================================================
Synopsis
--------
**fish_mode_prompt**
::
function fish_mode_prompt
echo -n "$fish_bind_mode "
end
Description
-----------
The ``fish_mode_prompt`` function outputs the mode indicator for use in vi-mode.
The default ``fish_mode_prompt`` function will output indicators about the current Vi editor mode displayed to the left of the regular prompt. Define your own function to customize the appearance of the mode indicator. The ``$fish_bind_mode variable`` can be used to determine the current mode. It will be one of ``default``, ``insert``, ``replace_one``, or ``visual``.
You can also define an empty ``fish_mode_prompt`` function to remove the Vi mode indicators::
function fish_mode_prompt; end
funcsave fish_mode_prompt
``fish_mode_prompt`` will be executed when the vi mode changes. If it produces any output, it is displayed and used. If it does not, the other prompt functions (:ref:`fish_prompt <cmd-fish_prompt>` and :ref:`fish_right_prompt <cmd-fish_right_prompt>`) will be executed as well in case they contain a mode display.
Example
-------
::
function fish_mode_prompt
switch $fish_bind_mode
case default
set_color --bold red
echo 'N'
case insert
set_color --bold green
echo 'I'
case replace_one
set_color --bold green
echo 'R'
case visual
set_color --bold brmagenta
echo 'V'
case '*'
set_color --bold red
echo '?'
end
set_color normal
end
Outputting multiple lines is not supported in ``fish_mode_prompt``.