builtin bind: make function keys lowercase (f1 instead of F1)

All other key names are lowercase so this inconsistency is weird.

CHANGELOG.rst

@@ -1141,7 +1141,7 @@ New or improved bindings
 - The binding for :kbd:`",*,y` now uses ``fish_clipboard_copy``, allowing it to support more than just ``xsel``.
 - The :kbd:`ctrl-space` binding can be correctly customised (:issue:`7922`).
 - ``exit`` works correctly in bindings (:issue:`7967`).
-- The :kbd:`F1` binding, which opens the manual page for the current command, now works around a bug in certain ``less`` versions that fail to clear the screen (:issue:`7863`).
+- The :kbd:`f1` binding, which opens the manual page for the current command, now works around a bug in certain ``less`` versions that fail to clear the screen (:issue:`7863`).
 - The binding for :kbd:`alt-s` now toggles whether ``sudo`` is prepended, even when it took the commandline from history instead of only adding it.
 - The new functions ``fish_commandline_prepend`` and ``fish_commandline_append`` allow toggling the presence of a prefix/suffix on the current commandline. (:issue:`7905`).
 - ``backward-kill-path-component`` :kbd:`ctrl-w`) no longer erases parts of two tokens when the cursor is positioned immediately after ``/``. (:issue:`6258`).
@@ -3547,7 +3547,7 @@ Other notable fixes and improvements
 -  ``type`` has a new ``-q`` option to suppress output (:issue:`1540` and, like
    other shells, ``type -a`` now prints all matches for a command
    (:issue:`261`).
--  Pressing F1 now shows the manual page for the current command
+-  Pressing :kbd:`f1` now shows the manual page for the current command
    (:issue:`1063`).
 -  ``fish_title`` functions have access to the arguments of the
    currently running argument as ``$argv[1]`` (:issue:`1542`).

doc_src/cmds/bind.rst

@@ -38,7 +38,7 @@ They are:
 - ``end``,
 - ``enter``,
 - ``escape``,
-- ``F1`` through ``F12``.
+- ``f1`` through ``f12``.
 - ``home``,
 - ``insert``,
 - ``minus`` (``-``),

doc_src/interactive.rst

@@ -327,7 +327,7 @@ Some bindings are common across Emacs and vi mode, because they aren't text edit
 
 - :kbd:`alt-d` moves the next word to the :ref:`killring`.
 
-- :kbd:`alt-h` (or :kbd:`F1`) shows the manual page for the current command, if one exists.
+- :kbd:`alt-h` (or :kbd:`f1`) shows the manual page for the current command, if one exists.
 
 - :kbd:`alt-l` lists the contents of the current directory, unless the cursor is over a directory argument, in which case the contents of that directory will be listed.
 

share/completions/bind.fish

@@ -70,7 +70,7 @@ function __fish_bind_complete
         printf '%sshift-\tShift modifier…\n' $prefix
         set -l key_names minus comma backspace delete escape \
             enter up down left right pageup pagedown home end insert tab \
-            space F(seq 12)
+            space f(seq 12)
         printf '%s\tNamed key\n' $prefix$key_names
     end
 end

share/functions/__fish_shared_key_bindings.fish

@@ -82,8 +82,8 @@ function __fish_shared_key_bindings -d "Bindings shared between emacs and vi mod
 
     bind --preset $argv alt-s 'for cmd in sudo doas please; if command -q $cmd; fish_commandline_prepend $cmd; break; end; end'
 
-    # Allow reading manpages by pressing F1 (many GUI applications) or Alt+h (like in zsh).
-    bind --preset $argv F1 __fish_man_page
+    # Allow reading manpages by pressing f1 (many GUI applications) or Alt+h (like in zsh).
+    bind --preset $argv f1 __fish_man_page
     $legacy_bind --preset $argv -k f1 __fish_man_page
     bind --preset $argv alt-h __fish_man_page
 

src/key.rs

@@ -245,7 +245,8 @@ pub(crate) fn parse_keys(value: &wstr) -> Result<Vec<Key>, WString> {
         && !value.contains('-')
         && !value.contains(KEY_SEPARATOR)
         && !KEY_NAMES.iter().any(|(_codepoint, name)| name == value)
-        && value.as_char_slice()[0] != 'F')
+        && value.as_char_slice()[0] != 'F'
+        && !(value.as_char_slice()[0] == 'f' && value.char_at(1).is_ascii_digit()))
         || first < ' '
     {
         // Hack: treat as legacy syntax (meaning: not comma separated) if
@@ -290,13 +291,13 @@ pub(crate) fn parse_keys(value: &wstr) -> Result<Vec<Key>, WString> {
                     modifiers,
                     codepoint,
                 })?
-            } else if codepoint.is_none() && key_name.starts_with('F') && key_name.len() <= 3 {
-                let num = key_name.strip_prefix('F').unwrap();
+            } else if codepoint.is_none() && key_name.starts_with('f') && key_name.len() <= 3 {
+                let num = key_name.strip_prefix('f').unwrap();
                 let codepoint = match fish_wcstoi(num) {
                     Ok(n) if (1..=12).contains(&n) => function_key(u32::try_from(n).unwrap()),
                     _ => {
                         return Err(wgettext_fmt!(
-                            "only F1 through F12 are supported, not 'F%s'",
+                            "only f1 through f12 are supported, not 'f%s'",
                             num,
                         ));
                     }
@@ -391,7 +392,7 @@ impl From<Key> for WString {
                     .contains(&key.codepoint)
                     .then(|| {
                         sprintf!(
-                            "F%d",
+                            "f%d",
                             u32::from(key.codepoint) - u32::from(function_key(1)) + 1
                         )
                     })

src/tests/key.rs

@@ -11,9 +11,10 @@ fn test_parse_key() {
     assert_eq!(parse_keys(L!("ctrl-a")), Ok(vec![ctrl('a')]));
     assert_eq!(parse_keys(L!("c-a")), Ok(vec![ctrl('a')]));
     assert_eq!(parse_keys(L!("\x01")), Ok(vec![ctrl('a')]));
-    assert!(parse_keys(L!("F0")).is_err());
+    assert!(parse_keys(L!("f0")).is_err());
     assert_eq!(
-        parse_keys(L!("F1")),
+        parse_keys(L!("f1")),
         Ok(vec![Key::from_raw(function_key(1))])
     );
+    assert!(parse_keys(L!("F1")).is_err());
 }