From 1dd8a113f2fade1b9ba7f410d9b647b0f53b26d9 Mon Sep 17 00:00:00 2001
From: Charles Maher <46153209+charlesmaher@users.noreply.github.com>
Date: Fri, 7 Oct 2022 06:27:28 +1100
Subject: [PATCH] Add feature to fish_commandline_prepend and fix minor issue
 (#9261)

* Prepending will now respect leading spaces instead of doubling it up.
* Removing a prefix no longer sends the cursor to the end of the line.
---
 share/functions/fish_commandline_prepend.fish | 26 +++++++++++++------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/share/functions/fish_commandline_prepend.fish b/share/functions/fish_commandline_prepend.fish
index 478be01cc..5fe561d5a 100644
--- a/share/functions/fish_commandline_prepend.fish
+++ b/share/functions/fish_commandline_prepend.fish
@@ -3,14 +3,24 @@ function fish_commandline_prepend --description "Prepend the given string to the
         commandline -r $history[1]
     end
 
-    set -l escaped (string escape --style=regex -- $argv[1])
     set -l process (commandline -p | string collect)
-    if set process (string replace -r -- "^$escaped " "" $process)
-        commandline --replace -p -- $process
-    else
-        set -l cursor (commandline -C)
-        commandline -C 0 -p
-        commandline -i -- "$argv[1] "
-        commandline -C (math $cursor + (string length -- "$argv[1] "))
+
+    set -l to_prepend "$argv[1] "
+    if string match -qr '^ ' "$process"
+        set to_prepend " $argv[1]"
     end
+
+    set -l length_diff (string length -- "$to_prepend")
+    set -l cursor_location (commandline -pC)
+
+    set -l escaped (string escape --style=regex -- $to_prepend)
+    if set process (string replace -r -- "^$escaped" "" $process)
+        commandline --replace -p -- $process
+        set length_diff "-$length_diff"
+    else
+        commandline -pC 0
+        commandline -pi -- "$to_prepend"
+    end
+
+    commandline -pC (math "max 0,($cursor_location + $length_diff)")
 end