From a3e9e179eb51476f3c700e485268db45d367f408 Mon Sep 17 00:00:00 2001
From: Fabian Homborg <FHomborg@gmail.com>
Date: Tue, 21 Jun 2016 19:06:44 +0200
Subject: Document fish_mode_prompt

---
 doc_src/fish_mode_prompt.txt | 11 +++++++++++
 doc_src/index.hdr.in         |  6 ++++++
 2 files changed, 17 insertions(+)
 create mode 100644 doc_src/fish_mode_prompt.txt

diff --git a/doc_src/fish_mode_prompt.txt b/doc_src/fish_mode_prompt.txt
new file mode 100644
index 00000000..b35d4ce4
--- /dev/null
+++ b/doc_src/fish_mode_prompt.txt
@@ -0,0 +1,11 @@
+\section fish_mode_prompt fish_mode_prompt - define the appearance of the mode indicator
+
+\subsection fish_mode_prompt-synopsis Synopsis
+
+fish_mode_prompt will output the mode indicator for use in vi-mode.
+
+\subsection fish_mode_prompt-description Description
+
+The output of `fish_mode_prompt` will be displayed in the mode indicator position to the left of the regular prompt.
+
+Multiple lines are not supported in `fish_mode_prompt`.
diff --git a/doc_src/index.hdr.in b/doc_src/index.hdr.in
index a25bf4c5..49d8552d 100644
--- a/doc_src/index.hdr.in
+++ b/doc_src/index.hdr.in
@@ -1012,6 +1012,8 @@ You can change these key bindings using the <a href="commands.html#bind">bind</a
 
 Vi mode allows for the use of Vi-like commands at the prompt. Initially, <a href="#vi-mode-insert">insert mode</a> is active. @key{Escape} enters <a href="#vi-mode-command">command mode</a>. The commands available in command, insert and visual mode are described below. Vi mode builds on top of <a href="#emacs-mode">Emacs mode</a>, so all keybindings mentioned there that do not contradict the ones mentioned here also work.
 
+When in vi-mode, the <a href="fish_mode_prompt.html">`fish_mode_prompt`</a> function will display a mode indicator to the left of the prompt. The `fish_vi_cursor` function is available to change the cursor's shape depending on the mode in supported terminals.
+
 \subsubsection vi-mode-command Command mode
 
 Command mode is also known as normal mode.
@@ -1200,6 +1202,10 @@ function fish_title
 end
 \endfish
 
+\subsection prompt Programmable prompt
+
+When fish waits for input, it will display a prompt by evaluating the `fish_prompt` and `fish_right_prompt` functions. The output of the former is displayed on the left and the latter's output on the right side of the terminal. The output of `fish_mode_prompt` will be prepended on the left, though the default function only does this when in <a href="index.html#vi-mode">vi-mode</a>.
+
 \subsection greeting Configurable greeting
 
 If a function named `fish_greeting` exists, it will be run when entering interactive mode. Otherwise, if an environment variable named `fish_greeting` exists, it will be printed.
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