feat(whkd): allow single vkey hotkeys

This commit updates the whkdrc grammar and parser to allow a single vkey
to be used as a hotkey, for example "f11 : komorebic toggle-maximize".

Cargo.toml

@@ -1,8 +1,7 @@
 [package]
 name = "whkd"
-version = "0.2.4"
+version = "0.2.5"
 description = "A simple hotkey daemon for Windows"
-categories = ["hotkey-daemon", "windows"]
 repository = "https://github.com/LGUG2Z/whkd"
 license = "MIT"
 edition = "2021"

src/main.rs

@@ -81,12 +81,19 @@ impl TryFrom<&HotkeyBinding> for HkmData {
     type Error = WHKError;
 
     fn try_from(value: &HotkeyBinding) -> Result<Self, Self::Error> {
-        let (trigger, mods) = value.keys.split_last().unwrap();
         let mut mod_keys = vec![];
-        let vkey = VKey::from_keyname(trigger)?;
-        for m in mods {
-            mod_keys.push(ModKey::from_keyname(m)?);
-        }
+
+        let (mod_keys, vkey) = if value.keys.len() == 1 {
+            (vec![], VKey::from_keyname(&value.keys[0])?)
+        } else {
+            let (trigger, mods) = value.keys.split_last().unwrap();
+            let vkey = VKey::from_keyname(trigger)?;
+            for m in mods {
+                mod_keys.push(ModKey::from_keyname(m)?);
+            }
+
+            (mod_keys, vkey)
+        };
 
         Ok(Self {
             mod_keys,

src/parser.rs

@@ -27,7 +27,7 @@ pub fn parser() -> impl Parser<char, Whkdrc, Error = Simple<char>> {
     let hotkeys = choice((text::ident(), text::int(10)))
         .padded()
         .separated_by(just("+"))
-        .at_least(2)
+        .at_least(1)
         .collect::<Vec<String>>();
 
     let delimiter = just(":").padded();
@@ -227,4 +227,26 @@ alt + 1 : komorebic focus-workspace 0 # digits are fine in the hotkeys section
 
         assert_eq!(output.unwrap(), expected);
     }
+
+    #[test]
+    fn test_binding_without_modkeys() {
+        let src = r#"
+# sample comment
+.shell pwsh # can be one of cmd | pwsh | powershell
+
+f11 : echo "hello f11""#;
+
+        let output = parser().parse(src);
+        let expected = Whkdrc {
+            shell: Shell::Pwsh,
+            app_bindings: vec![],
+            bindings: vec![HotkeyBinding {
+                keys: vec![String::from("f11")],
+                command: String::from("echo \"hello f11\""),
+                process_name: None,
+            }],
+        };
+
+        assert_eq!(output.unwrap(), expected);
+    }
 }