feat: add accelerator module (#17)

* Add accelerator module

* Add Linux port

* Add macOS port

* Add Windows port

* Remove unused types

* Fix doc tests

* Add more variants

Cargo.toml

@@ -13,6 +13,7 @@ categories = ["gui"]
 [dependencies]
 crossbeam-channel = "0.5"
 once_cell = "1.10"
+keyboard-types = "0.6"
 
 [target.'cfg(target_os = "windows")'.dependencies.windows-sys]
 version = "0.34"
@@ -26,6 +27,7 @@ features = [
 ]
 
 [target.'cfg(target_os = "linux")'.dependencies]
+gdk = "0.15"
 gtk = "0.15"
 libxdo = "0.6.0"
 

examples/tao.rs

@@ -1,4 +1,8 @@
-use muda::{menu_event_receiver, Menu, NativeMenuItem};
+use keyboard_types::Code;
+use muda::{
+    accelerator::{Accelerator, Mods},
+    menu_event_receiver, Menu, NativeMenuItem,
+};
 #[cfg(target_os = "linux")]
 use tao::platform::unix::WindowExtUnix;
 #[cfg(target_os = "windows")]
@@ -19,7 +23,11 @@ fn main() {
 
     let mut file_menu = menu_bar.add_submenu("&File", true);
     let mut open_item = file_menu.add_item("&Open", true, None);
-    let mut save_item = file_menu.add_item("&Save", true, Some("CommandOrCtrl+S"));
+    let mut save_item = file_menu.add_item(
+        "&Save",
+        true,
+        Some(Accelerator::new(Mods::Ctrl, Code::KeyS)),
+    );
     file_menu.add_native_item(NativeMenuItem::Minimize);
     file_menu.add_native_item(NativeMenuItem::CloseWindow);
     file_menu.add_native_item(NativeMenuItem::Quit);

examples/winit.rs

@@ -1,4 +1,8 @@
-use muda::{menu_event_receiver, Menu, NativeMenuItem};
+use keyboard_types::Code;
+use muda::{
+    accelerator::{Accelerator, Mods},
+    menu_event_receiver, Menu, NativeMenuItem,
+};
 #[cfg(target_os = "macos")]
 use winit::platform::macos::EventLoopBuilderExtMacOS;
 #[cfg(target_os = "windows")]
@@ -37,7 +41,11 @@ fn main() {
 
     let mut file_menu = menu_bar.add_submenu("&File", true);
     let mut open_item = file_menu.add_item("&Open", true, None);
-    let mut save_item = file_menu.add_item("&Save", true, Some("CommandOrCtrl+S"));
+    let mut save_item = file_menu.add_item(
+        "&Save",
+        true,
+        Some(Accelerator::new(Mods::Ctrl, Code::KeyS)),
+    );
     file_menu.add_native_item(NativeMenuItem::Minimize);
     file_menu.add_native_item(NativeMenuItem::CloseWindow);
     file_menu.add_native_item(NativeMenuItem::Quit);

src/accelerator.rs

@@ -0,0 +1,288 @@
+//! Accelerators describe keyboard shortcuts defined by the application.
+//!
+//! [`Accelerator`s](crate::accelerator::Accelerator) are used to define a keyboard shortcut consisting
+//! of an optional combination of modifier keys (provided by [`SysMods`](crate::accelerator::SysMods),
+//! [`RawMods`](crate::accelerator::RawMods) or [`Modifiers`](crate::accelerator::Modifiers)) and
+//! one key ([`Code`](crate::accelerator::Code)).
+//!
+//! # Examples
+//! They can be created directly
+//! ```
+//! # use muda::accelerator::{Accelerator, Mods, Modifiers, Code};
+//! #
+//! let accelerator = Accelerator::new(Mods::Shift, Code::KeyQ);
+//! let accelerator_with_raw_mods = Accelerator::new(Mods::Shift, Code::KeyQ);
+//! let accelerator_without_mods = Accelerator::new(None, Code::KeyQ);
+//! # assert_eq!(accelerator, accelerator_with_raw_mods);
+//! ```
+//! or from `&str`, note that all modifiers
+//! have to be listed before the non-modifier key, `shift+alt+KeyQ` is legal,
+//! whereas `shift+q+alt` is not.
+//! ```
+//! # use muda::accelerator::{Accelerator, Mods};
+//! #
+//! let accelerator: Accelerator = "shift+alt+KeyQ".parse().unwrap();
+//! #
+//! # // This assert exists to ensure a test breaks once the
+//! # // statement above about ordering is no longer valid.
+//! # assert!("shift+KeyQ+alt".parse::<Accelerator>().is_err());
+//! ```
+//!
+
+pub use keyboard_types::{Code, Modifiers};
+use std::{borrow::Borrow, hash::Hash, str::FromStr};
+
+/// Base `Accelerator` functions.
+#[derive(Debug, Clone, PartialEq, Hash)]
+pub struct Accelerator {
+    pub(crate) mods: Modifiers,
+    pub(crate) key: Code,
+}
+
+impl Accelerator {
+    /// Creates a new accelerator to define keyboard shortcuts throughout your application.
+    pub fn new(mods: impl Into<Option<Modifiers>>, key: Code) -> Self {
+        Self {
+            mods: mods.into().unwrap_or_else(Modifiers::empty),
+            key,
+        }
+    }
+
+    /// Returns `true` if this [`Code`] and [`Modifiers`] matches this `Accelerator`.
+    ///
+    /// [`Code`]: Code
+    /// [`Modifiers`]: crate::accelerator::Modifiers
+    pub fn matches(&self, modifiers: impl Borrow<Modifiers>, key: impl Borrow<Code>) -> bool {
+        // Should be a const but const bit_or doesn't work here.
+        let base_mods = Modifiers::SHIFT | Modifiers::CONTROL | Modifiers::ALT | Modifiers::SUPER;
+        let modifiers = modifiers.borrow();
+        let key = key.borrow();
+        self.mods == *modifiers & base_mods && self.key == *key
+    }
+}
+
+// Accelerator::from_str is available to be backward
+// compatible with tauri and it also open the option
+// to generate accelerator from string
+impl FromStr for Accelerator {
+    type Err = AcceleratorParseError;
+    fn from_str(accelerator_string: &str) -> Result<Self, Self::Err> {
+        parse_accelerator(accelerator_string)
+    }
+}
+
+/// Represents the active modifier keys.
+///
+/// This is intended to be clearer than [`Modifiers`], when describing accelerators.
+///
+#[non_exhaustive]
+#[derive(Debug, Clone, Copy, PartialEq, Hash)]
+pub enum Mods {
+    None,
+    Alt,
+    Ctrl,
+    Command,
+    CommandOrCtrl,
+    Meta,
+    Shift,
+    AltCtrl,
+    AltMeta,
+    AltShift,
+    CtrlShift,
+    CtrlMeta,
+    MetaShift,
+    AltCtrlMeta,
+    AltCtrlShift,
+    AltMetaShift,
+    CtrlMetaShift,
+    AltCtrlMetaShift,
+}
+
+impl From<Mods> for Option<Modifiers> {
+    fn from(src: Mods) -> Option<Modifiers> {
+        Some(src.into())
+    }
+}
+
+impl From<Mods> for Modifiers {
+    fn from(src: Mods) -> Modifiers {
+        let (alt, ctrl, meta, shift) = match src {
+            Mods::None => (false, false, false, false),
+            Mods::Alt => (true, false, false, false),
+            Mods::Ctrl => (false, true, false, false),
+            Mods::Command => (false, false, true, false),
+            #[cfg(target_os = "macos")]
+            Mods::CommandOrCtrl => (false, false, true, false),
+            #[cfg(not(target_os = "macos"))]
+            Mods::CommandOrCtrl => (false, true, false, false),
+            Mods::Meta => (false, false, true, false),
+            Mods::Shift => (false, false, false, true),
+            Mods::AltCtrl => (true, true, false, false),
+            Mods::AltMeta => (true, false, true, false),
+            Mods::AltShift => (true, false, false, true),
+            Mods::CtrlMeta => (false, true, true, false),
+            Mods::CtrlShift => (false, true, false, true),
+            Mods::MetaShift => (false, false, true, true),
+            Mods::AltCtrlMeta => (true, true, true, false),
+            Mods::AltMetaShift => (true, false, true, true),
+            Mods::AltCtrlShift => (true, true, false, true),
+            Mods::CtrlMetaShift => (false, true, true, true),
+            Mods::AltCtrlMetaShift => (true, true, true, true),
+        };
+        let mut mods = Modifiers::empty();
+        mods.set(Modifiers::ALT, alt);
+        mods.set(Modifiers::CONTROL, ctrl);
+        mods.set(Modifiers::SUPER, meta);
+        mods.set(Modifiers::SHIFT, shift);
+        mods
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct AcceleratorParseError(String);
+
+impl std::fmt::Display for AcceleratorParseError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "[AcceleratorParseError]: {}", self.0)
+    }
+}
+
+fn parse_accelerator(accelerator_string: &str) -> Result<Accelerator, AcceleratorParseError> {
+    let mut mods = Modifiers::empty();
+    let mut key = Code::Unidentified;
+
+    for raw in accelerator_string.split('+') {
+        let token = raw.trim().to_string();
+        if token.is_empty() {
+            return Err(AcceleratorParseError(
+                "Unexpected empty token while parsing accelerator".into(),
+            ));
+        }
+
+        if key != Code::Unidentified {
+            // at this point we already parsed the modifiers and found a main key but
+            // the function received more then one main key or it is not in the right order
+            // examples:
+            // 1. "Ctrl+Shift+C+A" => only one main key should be allowd.
+            // 2. "Ctrl+C+Shift" => wrong order
+            return Err(AcceleratorParseError(format!(
+                "Unexpected accelerator string format: \"{}\"",
+                accelerator_string
+            )));
+        }
+
+        match token.to_uppercase().as_str() {
+            "OPTION" | "ALT" => {
+                mods.set(Modifiers::ALT, true);
+            }
+            "CONTROL" | "CTRL" => {
+                mods.set(Modifiers::CONTROL, true);
+            }
+            "COMMAND" | "CMD" | "SUPER" => {
+                mods.set(Modifiers::SUPER, true);
+            }
+            "SHIFT" => {
+                mods.set(Modifiers::SHIFT, true);
+            }
+            "COMMANDORCONTROL" | "COMMANDORCTRL" | "CMDORCTRL" | "CMDORCONTROL" => {
+                #[cfg(target_os = "macos")]
+                mods.set(Modifiers::SUPER, true);
+                #[cfg(not(target_os = "macos"))]
+                mods.set(Modifiers::CONTROL, true);
+            }
+            _ => {
+                if let Ok(code) = Code::from_str(token.as_str()) {
+                    match code {
+                        Code::Unidentified => {
+                            return Err(AcceleratorParseError(format!(
+                                "Couldn't identify \"{}\" as a valid `Code`",
+                                token
+                            )))
+                        }
+                        _ => key = code,
+                    }
+                } else {
+                    return Err(AcceleratorParseError(format!(
+                        "Couldn't identify \"{}\" as a valid `Code`",
+                        token
+                    )));
+                }
+            }
+        }
+    }
+
+    Ok(Accelerator { key, mods })
+}
+
+#[test]
+fn test_parse_accelerator() {
+    assert_eq!(
+        parse_accelerator("CTRL+KeyX").unwrap(),
+        Accelerator {
+            mods: Modifiers::CONTROL,
+            key: Code::KeyX,
+        }
+    );
+    assert_eq!(
+        parse_accelerator("SHIFT+KeyC").unwrap(),
+        Accelerator {
+            mods: Modifiers::SHIFT,
+            key: Code::KeyC,
+        }
+    );
+    assert_eq!(
+        parse_accelerator("CTRL+KeyZ").unwrap(),
+        Accelerator {
+            mods: Modifiers::CONTROL,
+            key: Code::KeyZ,
+        }
+    );
+    assert_eq!(
+        parse_accelerator("super+ctrl+SHIFT+alt+ArrowUp").unwrap(),
+        Accelerator {
+            mods: Modifiers::SUPER | Modifiers::CONTROL | Modifiers::SHIFT | Modifiers::ALT,
+            key: Code::ArrowUp,
+        }
+    );
+    assert_eq!(
+        parse_accelerator("Digit5").unwrap(),
+        Accelerator {
+            mods: Modifiers::empty(),
+            key: Code::Digit5,
+        }
+    );
+    assert_eq!(
+        parse_accelerator("KeyG").unwrap(),
+        Accelerator {
+            mods: Modifiers::empty(),
+            key: Code::KeyG,
+        }
+    );
+
+    let acc = parse_accelerator("+G");
+    assert!(acc.is_err());
+
+    let acc = parse_accelerator("SHGSH+G");
+    assert!(acc.is_err());
+
+    assert_eq!(
+        parse_accelerator("SHiFT+F12").unwrap(),
+        Accelerator {
+            mods: Modifiers::SHIFT,
+            key: Code::F12,
+        }
+    );
+    assert_eq!(
+        parse_accelerator("CmdOrCtrl+Space").unwrap(),
+        Accelerator {
+            #[cfg(target_os = "macos")]
+            mods: Modifiers::SUPER,
+            #[cfg(not(target_os = "macos"))]
+            mods: Modifiers::CONTROL,
+            key: Code::Space,
+        }
+    );
+
+    let acc = parse_accelerator("CTRL+");
+    assert!(acc.is_err());
+}

src/lib.rs

@@ -3,14 +3,14 @@
 //!
 //! Before you can add submenus and menu items, you first need a root or a base menu.
 //! ```no_run
-//! let mut menu = Menu::new();
+//! let mut menu = muda::Menu::new();
 //! ```
 //!
 //! # Adding submens to the root menu
 //!
 //! Once you have a root menu you can start adding [`Submenu`]s by using [`Menu::add_submenu`].
 //! ```no_run
-//! let mut menu = Menu::new();
+//! let mut menu = muda::Menu::new();
 //! let file_menu = menu.add_submenu("File", true);
 //! let edit_menu = menu.add_submenu("Edit", true);
 //! ```
@@ -19,22 +19,22 @@
 //!
 //! Once you have a [`Submenu`] you can star creating more [`Submenu`]s or [`MenuItem`]s.
 //! ```no_run
-//! let mut menu = Menu::new();
+//! let mut menu = muda::Menu::new();
 //!
-//! let file_menu = menu.add_submenu("File", true);
+//! let mut file_menu = menu.add_submenu("File", true);
-//! let open_item = file_menu.add_text_item("Open", true);
+//! let open_item = file_menu.add_item("Open", true, None);
-//! let save_item = file_menu.add_text_item("Save", true);
+//! let save_item = file_menu.add_item("Save", true, None);
 //!
-//! let edit_menu = menu.add_submenu("Edit", true);
+//! let mut edit_menu = menu.add_submenu("Edit", true);
-//! let copy_item = file_menu.add_text_item("Copy", true);
+//! let copy_item = file_menu.add_item("Copy", true, None);
-//! let cut_item = file_menu.add_text_item("Cut", true);
+//! let cut_item = file_menu.add_item("Cut", true, None);
 //! ```
 //!
 //! # Add your root menu to a Window (Windows and Linux Only)
 //!
 //! You can use [`Menu`] to display a top menu in a Window on Windows and Linux.
-//! ```no_run
+//! ```ignore
-//! let mut menu = Menu::new();
+//! let mut menu = muda::Menu::new();
 //! // --snip--
 //! #[cfg(target_os = "windows")]
 //! menu.init_for_hwnd(window.hwnd() as isize);
@@ -48,8 +48,8 @@
 //!
 //! You can use [`menu_event_receiver`] to get a reference to the [`MenuEventReceiver`]
 //! which you can use to listen to events when a menu item is activated
-//! ```no_run
+//! ```ignore
-//! if let Ok(event) = menu_event_receiver().try_recv() {
+//! if let Ok(event) = muda::menu_event_receiver().try_recv() {
 //!     match event.id {
 //!         _ if event.id == save_item.id() => {
 //!             println!("Save menu item activated");
@@ -59,9 +59,11 @@
 //! }
 //! ```
 
+use accelerator::Accelerator;
 use crossbeam_channel::{unbounded, Receiver, Sender};
 use once_cell::sync::Lazy;
 
+pub mod accelerator;
 mod counter;
 mod platform_impl;
 
@@ -85,8 +87,8 @@ pub struct MenuEvent {
 ///
 /// # Example
 ///
-/// ```
+/// ```no_run
-/// let mut menu = Menu::new();
+/// let mut menu = muda::Menu::new();
 /// let file_menu = menu.add_submenu("File", true);
 /// let edit_menu = menu.add_submenu("Edit", true);
 /// ```
@@ -278,7 +280,7 @@ impl Submenu {
         &mut self,
         label: S,
         enabled: bool,
-        accelerator: Option<&str>,
+        accelerator: Option<Accelerator>,
     ) -> MenuItem {
         MenuItem(self.0.add_item(label, enabled, accelerator))
     }
@@ -294,7 +296,7 @@ impl Submenu {
         label: S,
         enabled: bool,
         checked: bool,
-        accelerator: Option<&str>,
+        accelerator: Option<Accelerator>,
     ) -> CheckMenuItem {
         CheckMenuItem(self.0.add_check_item(label, enabled, checked, accelerator))
     }

src/platform_impl/linux/accelerator.rs

@@ -1,3 +1,8 @@
+use gtk::{prelude::*, AccelGroup};
+use keyboard_types::{Code, Modifiers};
+
+use crate::accelerator::Accelerator;
+
 pub fn to_gtk_menemenoic<S: AsRef<str>>(string: S) -> String {
     string
         .as_ref()
@@ -6,39 +11,168 @@ pub fn to_gtk_menemenoic<S: AsRef<str>>(string: S) -> String {
         .replace("[~~]", "&&")
 }
 
-pub fn to_gtk_accelerator<S: AsRef<str>>(accelerator: S) -> String {
+pub fn register_accelerator<M: IsA<gtk::Widget>>(
-    let accelerator = accelerator.as_ref();
+    item: &M,
-    let mut s = accelerator.split("+");
+    accel_group: &AccelGroup,
-    let count = s.clone().count();
+    menu_key: &Accelerator,
-    let (mod1, mod2, key) = {
+) {
-        if count == 2 {
+    let accel_key = match &menu_key.key {
-            (s.next().unwrap(), None, s.next().unwrap())
+        Code::KeyA => 'A' as u32,
-        } else if count == 3 {
+        Code::KeyB => 'B' as u32,
-            (
+        Code::KeyC => 'C' as u32,
-                s.next().unwrap(),
+        Code::KeyD => 'D' as u32,
-                Some(s.next().unwrap()),
+        Code::KeyE => 'E' as u32,
-                s.next().unwrap(),
+        Code::KeyF => 'F' as u32,
-            )
+        Code::KeyG => 'G' as u32,
-        } else {
+        Code::KeyH => 'H' as u32,
-            panic!("Unsupported accelerator format: {}", accelerator)
+        Code::KeyI => 'I' as u32,
+        Code::KeyJ => 'J' as u32,
+        Code::KeyK => 'K' as u32,
+        Code::KeyL => 'L' as u32,
+        Code::KeyM => 'M' as u32,
+        Code::KeyN => 'N' as u32,
+        Code::KeyO => 'O' as u32,
+        Code::KeyP => 'P' as u32,
+        Code::KeyQ => 'Q' as u32,
+        Code::KeyR => 'R' as u32,
+        Code::KeyS => 'S' as u32,
+        Code::KeyT => 'T' as u32,
+        Code::KeyU => 'U' as u32,
+        Code::KeyV => 'V' as u32,
+        Code::KeyW => 'W' as u32,
+        Code::KeyX => 'X' as u32,
+        Code::KeyY => 'Y' as u32,
+        Code::KeyZ => 'Z' as u32,
+        Code::Digit0 => '0' as u32,
+        Code::Digit1 => '1' as u32,
+        Code::Digit2 => '2' as u32,
+        Code::Digit3 => '3' as u32,
+        Code::Digit4 => '4' as u32,
+        Code::Digit5 => '5' as u32,
+        Code::Digit6 => '6' as u32,
+        Code::Digit7 => '7' as u32,
+        Code::Digit8 => '8' as u32,
+        Code::Digit9 => '9' as u32,
+        Code::Comma => ',' as u32,
+        Code::Minus => '-' as u32,
+        Code::Period => '.' as u32,
+        Code::Space => ' ' as u32,
+        Code::Equal => '=' as u32,
+        Code::Semicolon => ';' as u32,
+        Code::Slash => '/' as u32,
+        Code::Backslash => '\\' as u32,
+        Code::Quote => '\'' as u32,
+        Code::Backquote => '`' as u32,
+        Code::BracketLeft => '[' as u32,
+        Code::BracketRight => ']' as u32,
+        k => {
+            if let Some(gdk_key) = key_to_raw_key(k) {
+                *gdk_key
+            } else {
+                dbg!("Cannot map key {:?}", k);
+                return;
+            }
         }
     };
 
-    let mut gtk_accelerator = parse_mod(mod1).to_string();
+    item.add_accelerator(
-    if let Some(mod2) = mod2 {
+        "activate",
-        gtk_accelerator.push_str(parse_mod(mod2));
+        accel_group,
-    }
+        accel_key,
-    gtk_accelerator.push_str(key);
+        modifiers_to_gdk_modifier_type(menu_key.mods),
-
+        gtk::AccelFlags::VISIBLE,
-    gtk_accelerator
+    );
 }
 
-fn parse_mod(modifier: &str) -> &str {
+fn modifiers_to_gdk_modifier_type(modifiers: Modifiers) -> gdk::ModifierType {
-    match modifier.to_uppercase().as_str() {
+    let mut result = gdk::ModifierType::empty();
-        "SHIFT" => "<Shift>",
+
-        "CONTROL" | "CTRL" | "COMMAND" | "COMMANDORCONTROL" | "COMMANDORCTRL" => "<Ctrl>",
+    result.set(
-        "ALT" => "<Alt>",
+        gdk::ModifierType::MOD1_MASK,
-        "SUPER" | "META" | "WIN" => "<Meta>",
+        modifiers.contains(Modifiers::ALT),
-        _ => panic!("Unsupported modifier: {}", modifier),
+    );
-    }
+    result.set(
+        gdk::ModifierType::CONTROL_MASK,
+        modifiers.contains(Modifiers::CONTROL),
+    );
+    result.set(
+        gdk::ModifierType::SHIFT_MASK,
+        modifiers.contains(Modifiers::SHIFT),
+    );
+    result.set(
+        gdk::ModifierType::META_MASK,
+        modifiers.contains(Modifiers::SUPER),
+    );
+
+    result
+}
+
+fn key_to_raw_key(src: &Code) -> Option<gdk::keys::Key> {
+    use gdk::keys::constants::*;
+    Some(match src {
+        Code::Escape => Escape,
+        Code::Backspace => BackSpace,
+
+        Code::Tab => Tab,
+        Code::Enter => Return,
+
+        Code::ControlLeft => Control_L,
+        Code::AltLeft => Alt_L,
+        Code::ShiftLeft => Shift_L,
+        Code::MetaLeft => Super_L,
+
+        Code::ControlRight => Control_R,
+        Code::AltRight => Alt_R,
+        Code::ShiftRight => Shift_R,
+        Code::MetaRight => Super_R,
+
+        Code::CapsLock => Caps_Lock,
+        Code::F1 => F1,
+        Code::F2 => F2,
+        Code::F3 => F3,
+        Code::F4 => F4,
+        Code::F5 => F5,
+        Code::F6 => F6,
+        Code::F7 => F7,
+        Code::F8 => F8,
+        Code::F9 => F9,
+        Code::F10 => F10,
+        Code::F11 => F11,
+        Code::F12 => F12,
+        Code::F13 => F13,
+        Code::F14 => F14,
+        Code::F15 => F15,
+        Code::F16 => F16,
+        Code::F17 => F17,
+        Code::F18 => F18,
+        Code::F19 => F19,
+        Code::F20 => F20,
+        Code::F21 => F21,
+        Code::F22 => F22,
+        Code::F23 => F23,
+        Code::F24 => F24,
+
+        Code::PrintScreen => Print,
+        Code::ScrollLock => Scroll_Lock,
+        // Pause/Break not audio.
+        Code::Pause => Pause,
+
+        Code::Insert => Insert,
+        Code::Delete => Delete,
+        Code::Home => Home,
+        Code::End => End,
+        Code::PageUp => Page_Up,
+        Code::PageDown => Page_Down,
+
+        Code::NumLock => Num_Lock,
+
+        Code::ArrowUp => Up,
+        Code::ArrowDown => Down,
+        Code::ArrowLeft => Left,
+        Code::ArrowRight => Right,
+
+        Code::ContextMenu => Menu,
+        Code::WakeUp => WakeUp,
+        _ => return None,
+    })
 }

src/platform_impl/linux/mod.rs

@@ -1,7 +1,7 @@
 mod accelerator;
 
-use crate::{counter::Counter, NativeMenuItem};
+use crate::{accelerator::Accelerator, counter::Counter, NativeMenuItem};
-use accelerator::{to_gtk_accelerator, to_gtk_menemenoic};
+use accelerator::{register_accelerator, to_gtk_menemenoic};
 use gtk::{prelude::*, Orientation};
 use std::{cell::RefCell, collections::HashMap, rc::Rc};
 
@@ -14,7 +14,7 @@ struct MenuEntry {
     enabled: bool,
     checked: bool,
     id: u64,
-    accelerator: Option<String>,
+    accelerator: Option<Accelerator>,
     r#type: MenuEntryType,
     entries: Option<Vec<Rc<RefCell<MenuEntry>>>>,
 }
@@ -247,7 +247,7 @@ impl Submenu {
         &mut self,
         label: S,
         enabled: bool,
-        accelerator: Option<&str>,
+        accelerator: Option<Accelerator>,
     ) -> MenuItem {
         let label = label.as_ref().to_string();
         let id = COUNTER.next();
@@ -257,7 +257,7 @@ impl Submenu {
             enabled,
             r#type: MenuEntryType::MenuItem(Vec::new()),
             id,
-            accelerator: accelerator.map(|s| s.to_string()),
+            accelerator: accelerator.clone(),
             ..Default::default()
         }));
 
@@ -265,13 +265,7 @@ impl Submenu {
 
         if let MenuEntryType::Submenu(native_menus) = &mut inner.r#type {
             for (_, menu) in native_menus {
-                let item = create_gtk_menu_item(
+                let item = create_gtk_menu_item(&label, enabled, &accelerator, id, &*self.1);
-                    &label,
-                    enabled,
-                    &accelerator.map(|s| s.to_string()),
-                    id,
-                    &*self.1,
-                );
                 menu.append(&item);
                 if let MenuEntryType::MenuItem(native_items) = &mut entry.borrow_mut().r#type {
                     native_items.push(item);
@@ -304,7 +298,7 @@ impl Submenu {
         label: S,
         enabled: bool,
         checked: bool,
-        accelerator: Option<&str>,
+        accelerator: Option<Accelerator>,
     ) -> CheckMenuItem {
         let label = label.as_ref().to_string();
         let id = COUNTER.next();
@@ -315,7 +309,7 @@ impl Submenu {
             checked,
             r#type: MenuEntryType::CheckMenuItem(Vec::new()),
             id,
-            accelerator: accelerator.map(|s| s.to_string()),
+            accelerator: accelerator.clone(),
             ..Default::default()
         }));
 
@@ -327,7 +321,7 @@ impl Submenu {
                     &label,
                     enabled,
                     checked,
-                    &accelerator.map(|s| s.to_string()),
+                    &accelerator,
                     id,
                     &*self.1,
                 );
@@ -511,21 +505,14 @@ fn create_gtk_submenu(label: &str, enabled: bool) -> (gtk::MenuItem, gtk::Menu)
 fn create_gtk_menu_item(
     label: &str,
     enabled: bool,
-    accelerator: &Option<String>,
+    accelerator: &Option<Accelerator>,
     id: u64,
     accel_group: &gtk::AccelGroup,
 ) -> gtk::MenuItem {
     let item = gtk::MenuItem::with_mnemonic(&to_gtk_menemenoic(label));
     item.set_sensitive(enabled);
     if let Some(accelerator) = accelerator {
-        let (key, modifiers) = gtk::accelerator_parse(&to_gtk_accelerator(accelerator));
+        register_accelerator(&item, accel_group, accelerator);
-        item.add_accelerator(
-            "activate",
-            accel_group,
-            key,
-            modifiers,
-            gtk::AccelFlags::VISIBLE,
-        );
     }
     item.connect_activate(move |_| {
         let _ = crate::MENU_CHANNEL.0.send(crate::MenuEvent { id });
@@ -538,7 +525,7 @@ fn create_gtk_check_menu_item(
     label: &str,
     enabled: bool,
     checked: bool,
-    accelerator: &Option<String>,
+    accelerator: &Option<Accelerator>,
     id: u64,
     accel_group: &gtk::AccelGroup,
 ) -> gtk::CheckMenuItem {
@@ -546,14 +533,7 @@ fn create_gtk_check_menu_item(
     item.set_sensitive(enabled);
     item.set_active(checked);
     if let Some(accelerator) = accelerator {
-        let (key, modifiers) = gtk::accelerator_parse(&to_gtk_accelerator(accelerator));
+        register_accelerator(&item, accel_group, accelerator);
-        item.add_accelerator(
-            "activate",
-            accel_group,
-            key,
-            modifiers,
-            gtk::AccelFlags::VISIBLE,
-        );
     }
     item.connect_activate(move |_| {
         let _ = crate::MENU_CHANNEL.0.send(crate::MenuEvent { id });

src/platform_impl/macos/accelerator.rs

@@ -1,108 +1,133 @@
 use cocoa::appkit::NSEventModifierFlags;
+use keyboard_types::{Code, Modifiers};
+
+use crate::accelerator::Accelerator;
 
 /// Mnemonic is deprecated since macOS 10
 pub fn remove_mnemonic(string: impl AsRef<str>) -> String {
     string.as_ref().replace("&", "")
 }
 
-/// Returns a tuple of (Key, Modifier)
+impl Accelerator {
-pub fn parse_accelerator(accelerator: impl AsRef<str>) -> (String, NSEventModifierFlags) {
+    /// Return the string value of this hotkey, for use with Cocoa `NSResponder`
-    let accelerator = accelerator.as_ref();
+    /// objects.
-    let mut s = accelerator.split("+");
+    ///
-    let count = s.clone().count();
+    /// Returns the empty string if no key equivalent is known.
-    let (mod1, mod2, key) = {
+    pub fn key_equivalent(&self) -> String {
-        if count == 2 {
+        match self.key {
-            (s.next().unwrap(), None, s.next().unwrap())
+            Code::KeyA => "a".into(),
-        } else if count == 3 {
+            Code::KeyB => "b".into(),
-            (
+            Code::KeyC => "c".into(),
-                s.next().unwrap(),
+            Code::KeyD => "d".into(),
-                Some(s.next().unwrap()),
+            Code::KeyE => "e".into(),
-                s.next().unwrap(),
+            Code::KeyF => "f".into(),
-            )
+            Code::KeyG => "g".into(),
-        } else {
+            Code::KeyH => "h".into(),
-            panic!("Unsupported accelerator format: {}", accelerator)
+            Code::KeyI => "i".into(),
+            Code::KeyJ => "j".into(),
+            Code::KeyK => "k".into(),
+            Code::KeyL => "l".into(),
+            Code::KeyM => "m".into(),
+            Code::KeyN => "n".into(),
+            Code::KeyO => "o".into(),
+            Code::KeyP => "p".into(),
+            Code::KeyQ => "q".into(),
+            Code::KeyR => "r".into(),
+            Code::KeyS => "s".into(),
+            Code::KeyT => "t".into(),
+            Code::KeyU => "u".into(),
+            Code::KeyV => "v".into(),
+            Code::KeyW => "w".into(),
+            Code::KeyX => "x".into(),
+            Code::KeyY => "y".into(),
+            Code::KeyZ => "z".into(),
+            Code::Digit0 => "0".into(),
+            Code::Digit1 => "1".into(),
+            Code::Digit2 => "2".into(),
+            Code::Digit3 => "3".into(),
+            Code::Digit4 => "4".into(),
+            Code::Digit5 => "5".into(),
+            Code::Digit6 => "6".into(),
+            Code::Digit7 => "7".into(),
+            Code::Digit8 => "8".into(),
+            Code::Digit9 => "9".into(),
+            Code::Comma => ",".into(),
+            Code::Minus => "-".into(),
+            Code::Period => ".".into(),
+            Code::Space => "\u{0020}".into(),
+            Code::Equal => "=".into(),
+            Code::Semicolon => ";".into(),
+            Code::Slash => "/".into(),
+            Code::Backslash => "\\".into(),
+            Code::Quote => "\'".into(),
+            Code::Backquote => "`".into(),
+            Code::BracketLeft => "[".into(),
+            Code::BracketRight => "]".into(),
+            Code::Tab => "⇥".into(),
+            Code::Escape => "\u{001b}".into(),
+            // from NSText.h
+            Code::Enter => "\u{0003}".into(),
+            Code::Backspace => "\u{0008}".into(),
+            Code::Delete => "\u{007f}".into(),
+            // from NSEvent.h
+            Code::Insert => "\u{F727}".into(),
+            Code::Home => "\u{F729}".into(),
+            Code::End => "\u{F72B}".into(),
+            Code::PageUp => "\u{F72C}".into(),
+            Code::PageDown => "\u{F72D}".into(),
+            Code::PrintScreen => "\u{F72E}".into(),
+            Code::ScrollLock => "\u{F72F}".into(),
+            Code::ArrowUp => "\u{F700}".into(),
+            Code::ArrowDown => "\u{F701}".into(),
+            Code::ArrowLeft => "\u{F702}".into(),
+            Code::ArrowRight => "\u{F703}".into(),
+            Code::F1 => "\u{F704}".into(),
+            Code::F2 => "\u{F705}".into(),
+            Code::F3 => "\u{F706}".into(),
+            Code::F4 => "\u{F707}".into(),
+            Code::F5 => "\u{F708}".into(),
+            Code::F6 => "\u{F709}".into(),
+            Code::F7 => "\u{F70A}".into(),
+            Code::F8 => "\u{F70B}".into(),
+            Code::F9 => "\u{F70C}".into(),
+            Code::F10 => "\u{F70D}".into(),
+            Code::F11 => "\u{F70E}".into(),
+            Code::F12 => "\u{F70F}".into(),
+            Code::F13 => "\u{F710}".into(),
+            Code::F14 => "\u{F711}".into(),
+            Code::F15 => "\u{F712}".into(),
+            Code::F16 => "\u{F713}".into(),
+            Code::F17 => "\u{F714}".into(),
+            Code::F18 => "\u{F715}".into(),
+            Code::F19 => "\u{F716}".into(),
+            Code::F20 => "\u{F717}".into(),
+            Code::F21 => "\u{F718}".into(),
+            Code::F22 => "\u{F719}".into(),
+            Code::F23 => "\u{F71A}".into(),
+            Code::F24 => "\u{F71B}".into(),
+            _ => {
+                #[cfg(debug_assertions)]
+                eprintln!("no key equivalent for {:?}", self);
+                "".into()
+            }
         }
-    };
-
-    let mut mods = NSEventModifierFlags::empty();
-    let mod1_flag = parse_mod(mod1);
-    mods |= mod1_flag;
-    if let Some(mod2) = mod2 {
-        let mod2_flag = parse_mod(mod2);
-        mods |= mod2_flag;
     }
 
-    let key_equivalent = parse_key(key);
+    pub fn key_modifier_mask(&self) -> NSEventModifierFlags {
-
+        let mods: Modifiers = self.mods;
-    (key_equivalent, mods)
+        let mut flags = NSEventModifierFlags::empty();
-}
+        if mods.contains(Modifiers::SHIFT) {
-
+            flags.insert(NSEventModifierFlags::NSShiftKeyMask);
-fn parse_mod(modifier: &str) -> NSEventModifierFlags {
+        }
-    match modifier.to_uppercase().as_str() {
+        if mods.contains(Modifiers::SUPER) {
-        "SHIFT" => NSEventModifierFlags::NSShiftKeyMask,
+            flags.insert(NSEventModifierFlags::NSCommandKeyMask);
-        "CONTROL" | "CTRL" => NSEventModifierFlags::NSControlKeyMask,
+        }
-        "OPTION" | "ALT" => NSEventModifierFlags::NSAlternateKeyMask,
+        if mods.contains(Modifiers::ALT) {
-        "COMMAND" | "CMD" | "SUPER" | "COMMANDORCONTROL" | "COMMANDORCTRL" | "CMDORCTRL"
+            flags.insert(NSEventModifierFlags::NSAlternateKeyMask);
-        | "CMDORCONTROL" => NSEventModifierFlags::NSCommandKeyMask,
+        }
-        _ => panic!("Unsupported modifier: {}", modifier),
+        if mods.contains(Modifiers::CONTROL) {
-    }
+            flags.insert(NSEventModifierFlags::NSControlKeyMask);
-}
+        }
-
+        flags
-fn parse_key(key: &str) -> String {
-    match key.to_uppercase().as_str() {
-        "SPACE" => "\u{0020}".into(),
-        "BACKSPACE" => "\u{0008}".into(),
-        "TAB" => "⇥".into(),
-        "ENTER" | "RETURN" => "\u{0003}".into(),
-        "ESC" | "ESCAPE" => "\u{001b}".into(),
-        "PAGEUP" => "\u{F72C}".into(),
-        "PAGEDOWN" => "\u{F72D}".into(),
-        "END" => "\u{F72B}".into(),
-        "HOME" => "\u{F729}".into(),
-        "LEFTARROW" => "\u{F702}".into(),
-        "UPARROW" => "\u{F700}".into(),
-        "RIGHTARROW" => "\u{F703}".into(),
-        "DOWNARROW" => "\u{F701}".into(),
-        "DELETE" => "\u{007f}".into(),
-        "0" => "0".into(),
-        "1" => "1".into(),
-        "2" => "2".into(),
-        "3" => "3".into(),
-        "4" => "4".into(),
-        "5" => "5".into(),
-        "6" => "6".into(),
-        "7" => "7".into(),
-        "8" => "8".into(),
-        "9" => "9".into(),
-        "A" => "a".into(),
-        "B" => "b".into(),
-        "C" => "c".into(),
-        "D" => "d".into(),
-        "E" => "e".into(),
-        "F" => "f".into(),
-        "G" => "g".into(),
-        "H" => "h".into(),
-        "I" => "i".into(),
-        "J" => "j".into(),
-        "K" => "k".into(),
-        "L" => "l".into(),
-        "M" => "m".into(),
-        "N" => "n".into(),
-        "O" => "o".into(),
-        "P" => "p".into(),
-        "Q" => "q".into(),
-        "R" => "r".into(),
-        "S" => "s".into(),
-        "T" => "t".into(),
-        "U" => "u".into(),
-        "V" => "v".into(),
-        "W" => "w".into(),
-        "X" => "x".into(),
-        "Y" => "y".into(),
-        "Z" => "z".into(),
-        "," => ",".into(),
-        "." => ".".into(),
-        "/" => "/".into(),
-        _ => panic!("Unsupported modifier: {}", key),
     }
 }

src/platform_impl/macos/menu_item.rs

@@ -1,5 +1,6 @@
+use crate::accelerator::Accelerator;
 use crate::counter::Counter;
-use crate::platform_impl::platform_impl::accelerator::{parse_accelerator, remove_mnemonic};
+use crate::platform_impl::platform_impl::accelerator::remove_mnemonic;
 use cocoa::{
     appkit::{NSButton, NSEventModifierFlags, NSMenuItem},
     base::{id, nil, BOOL, NO, YES},
@@ -29,7 +30,7 @@ impl MenuItem {
         label: S,
         enabled: bool,
         selector: Sel,
-        accelerator: Option<&str>,
+        accelerator: Option<Accelerator>,
     ) -> Self {
         let (id, ns_menu_item) = make_menu_item(&remove_mnemonic(&label), selector, accelerator);
 
@@ -95,7 +96,7 @@ impl CheckMenuItem {
         enabled: bool,
         checked: bool,
         selector: Sel,
-        accelerator: Option<&str>,
+        accelerator: Option<Accelerator>,
     ) -> Self {
         let (id, ns_menu_item) = make_menu_item(&remove_mnemonic(&label), selector, accelerator);
 
@@ -169,7 +170,11 @@ impl CheckMenuItem {
     }
 }
 
-pub fn make_menu_item(title: &str, selector: Sel, accelerator: Option<&str>) -> (u64, *mut Object) {
+pub fn make_menu_item(
+    title: &str,
+    selector: Sel,
+    accelerator: Option<Accelerator>,
+) -> (u64, *mut Object) {
     let alloc = make_menu_item_alloc();
     let menu_id = COUNTER.next();
 
@@ -221,12 +226,13 @@ fn make_menu_item_from_alloc(
     alloc: *mut Object,
     title: *mut Object,
     selector: Sel,
-    accelerator: Option<&str>,
+    accelerator: Option<Accelerator>,
 ) -> *mut Object {
     unsafe {
         let (key_equivalent, masks) = match accelerator {
             Some(accelerator) => {
-                let (key, mods) = parse_accelerator(accelerator);
+                let key = accelerator.key_equivalent();
+                let mods = accelerator.key_modifier_mask();
                 let key = NSString::alloc(nil).init_str(&key);
                 (key, mods)
             }

src/platform_impl/macos/mod.rs

@@ -1,13 +1,15 @@
 mod accelerator;
 mod menu_item;
 
-use crate::platform_impl::platform_impl::menu_item::make_menu_item;
+use crate::accelerator::{RawMods, SysMods};
 use crate::NativeMenuItem;
+use crate::{accelerator::Accelerator, platform_impl::platform_impl::menu_item::make_menu_item};
 use cocoa::{
     appkit::{NSApp, NSApplication, NSMenu, NSMenuItem},
     base::{id, nil, selector, NO},
     foundation::{NSAutoreleasePool, NSString},
 };
+use keyboard_types::Code;
 use objc::{class, msg_send, sel, sel_impl};
 
 use self::accelerator::remove_mnemonic;
@@ -90,7 +92,7 @@ impl Submenu {
         &mut self,
         label: S,
         enabled: bool,
-        accelerator: Option<&str>,
+        accelerator: Option<Accelerator>,
     ) -> MenuItem {
         let item = MenuItem::new(label, enabled, sel!(fireMenubarAction:), accelerator);
         unsafe {
@@ -110,17 +112,25 @@ impl Submenu {
                     None,
                 )
             }
-            NativeMenuItem::CloseWindow => {
+            NativeMenuItem::CloseWindow => make_menu_item(
-                make_menu_item("Close Window", selector("performClose:"), Some("Command+W"))
+                "Close Window",
-            }
+                selector("performClose:"),
-            NativeMenuItem::Quit => {
+                Some(Accelerator::new(SysMods::Cmd, Code::KeyW)),
-                make_menu_item("Quit", selector("terminate:"), Some("Command+Q"))
+            ),
-            }
+            NativeMenuItem::Quit => make_menu_item(
-            NativeMenuItem::Hide => make_menu_item("Hide", selector("hide:"), Some("Command+H")),
+                "Quit",
+                selector("terminate:"),
+                Some(Accelerator::new(SysMods::Cmd, Code::KeyQ)),
+            ),
+            NativeMenuItem::Hide => make_menu_item(
+                "Hide",
+                selector("hide:"),
+                Some(Accelerator::new(SysMods::Cmd, Code::KeyH)),
+            ),
             NativeMenuItem::HideOthers => make_menu_item(
                 "Hide Others",
                 selector("hideOtherApplications:"),
-                Some("Alt+H"),
+                Some(Accelerator::new(RawMods::Alt, Code::KeyH)),
             ),
             NativeMenuItem::ShowAll => {
                 make_menu_item("Show All", selector("unhideAllApplications:"), None)
@@ -128,24 +138,44 @@ impl Submenu {
             NativeMenuItem::ToggleFullScreen => make_menu_item(
                 "Toggle Full Screen",
                 selector("toggleFullScreen:"),
-                Some("Ctrl+F"),
+                Some(Accelerator::new(RawMods::Ctrl, Code::KeyF)),
             ),
             NativeMenuItem::Minimize => make_menu_item(
                 "Minimize",
                 selector("performMiniaturize:"),
-                Some("Command+M"),
+                Some(Accelerator::new(SysMods::Cmd, Code::KeyM)),
             ),
             NativeMenuItem::Zoom => make_menu_item("Zoom", selector("performZoom:"), None),
-            NativeMenuItem::Copy => make_menu_item("Copy", selector("copy:"), Some("Command+C")),
+            NativeMenuItem::Copy => make_menu_item(
-            NativeMenuItem::Cut => make_menu_item("Cut", selector("cut:"), Some("Command+X")),
+                "Copy",
-            NativeMenuItem::Paste => make_menu_item("Paste", selector("paste:"), Some("Command+V")),
+                selector("copy:"),
-            NativeMenuItem::Undo => make_menu_item("Undo", selector("undo:"), Some("Command+Z")),
+                Some(Accelerator::new(SysMods::Cmd, Code::KeyC)),
-            NativeMenuItem::Redo => {
+            ),
-                make_menu_item("Redo", selector("redo:"), Some("Command+Shift+Z"))
+            NativeMenuItem::Cut => make_menu_item(
-            }
+                "Cut",
-            NativeMenuItem::SelectAll => {
+                selector("cut:"),
-                make_menu_item("Select All", selector("selectAll:"), Some("Command+A"))
+                Some(Accelerator::new(SysMods::Cmd, Code::KeyX)),
-            }
+            ),
+            NativeMenuItem::Paste => make_menu_item(
+                "Paste",
+                selector("paste:"),
+                Some(Accelerator::new(SysMods::Cmd, Code::KeyV)),
+            ),
+            NativeMenuItem::Undo => make_menu_item(
+                "Undo",
+                selector("undo:"),
+                Some(Accelerator::new(SysMods::Cmd, Code::KeyZ)),
+            ),
+            NativeMenuItem::Redo => make_menu_item(
+                "Redo",
+                selector("redo:"),
+                Some(Accelerator::new(SysMods::CmdShift, Code::KeyZ)),
+            ),
+            NativeMenuItem::SelectAll => make_menu_item(
+                "Select All",
+                selector("selectAll:"),
+                Some(Accelerator::new(SysMods::Cmd, Code::KeyA)),
+            ),
             NativeMenuItem::Services => unsafe {
                 let (_, item) = make_menu_item("Services", sel!(fireMenubarAction:), None);
                 let app_class = class!(NSApplication);
@@ -165,7 +195,7 @@ impl Submenu {
         label: S,
         enabled: bool,
         checked: bool,
-        accelerator: Option<&str>,
+        accelerator: Option<Accelerator>,
     ) -> CheckMenuItem {
         let item = CheckMenuItem::new(
             label,

src/platform_impl/windows/accelerator.rs

@@ -1,115 +1,243 @@
-use windows_sys::Win32::UI::WindowsAndMessaging::{FALT, FCONTROL, FSHIFT, FVIRTKEY};
+use std::fmt;
 
-/// Returns a tuple of (Key, Modifier, a string representation to be used in menu items)
+use keyboard_types::{Code, Modifiers};
-pub fn parse_accelerator<S: AsRef<str>>(accelerator: S) -> (u16, u32, String) {
+use windows_sys::Win32::UI::{
-    let accelerator = accelerator.as_ref();
+    Input::KeyboardAndMouse::*,
-    let mut s = accelerator.split("+");
+    WindowsAndMessaging::{ACCEL, FALT, FCONTROL, FSHIFT, FVIRTKEY},
-    let count = s.clone().count();
+};
-    let (mod1, mod2, key) = {
+
-        if count == 2 {
+use crate::accelerator::Accelerator;
-            (s.next().unwrap(), None, s.next().unwrap())
+
-        } else if count == 3 {
+impl Accelerator {
-            (
+    // Convert a hotkey to an accelerator.
-                s.next().unwrap(),
+    pub fn to_accel(&self, menu_id: u16) -> ACCEL {
-                Some(s.next().unwrap()),
+        let mut virt_key = FVIRTKEY;
-                s.next().unwrap(),
+        let key_mods: Modifiers = self.mods;
-            )
+        if key_mods.contains(Modifiers::CONTROL) {
-        } else {
+            virt_key |= FCONTROL;
-            panic!("Unsupported accelerator format: {}", accelerator)
+        }
+        if key_mods.contains(Modifiers::ALT) {
+            virt_key |= FALT;
+        }
+        if key_mods.contains(Modifiers::SHIFT) {
+            virt_key |= FSHIFT;
         }
-    };
 
-    let mut accel_str = String::new();
+        let vk_code = key_to_vk(&self.key);
-    let mut mods_vk = FVIRTKEY;
+        let mod_code = vk_code >> 8;
+        if mod_code & 0x1 != 0 {
+            virt_key |= FSHIFT;
+        }
+        if mod_code & 0x02 != 0 {
+            virt_key |= FCONTROL;
+        }
+        if mod_code & 0x04 != 0 {
+            virt_key |= FALT;
+        }
+        let raw_key = vk_code & 0x00ff;
 
-    let (mod1_vk, mod1_str) = parse_mod(mod1);
+        ACCEL {
-    accel_str.push_str(mod1_str);
+            fVirt: virt_key as u8,
-    accel_str.push_str("+");
+            key: raw_key as u16,
-    mods_vk |= mod1_vk;
+            cmd: menu_id,
-    if let Some(mod2) = mod2 {
+        }
-        let (mod2_vk, mod2_str) = parse_mod(mod2);
-        accel_str.push_str(mod2_str);
-        accel_str.push_str("+");
-        mods_vk |= mod2_vk;
-    }
-    let (key_vk, key_str) = parse_key(key);
-    accel_str.push_str(key_str);
-
-    (key_vk, mods_vk, accel_str)
-}
-
-fn parse_mod(modifier: &str) -> (u32, &str) {
-    match modifier.to_uppercase().as_str() {
-        "SHIFT" => (FSHIFT, "Shift"),
-        "CONTROL" | "CTRL" | "COMMAND" | "COMMANDORCONTROL" | "COMMANDORCTRL" => (FCONTROL, "Ctrl"),
-        "ALT" => (FALT, "Alt"),
-        _ => panic!("Unsupported modifier: {}", modifier),
     }
 }
 
-fn parse_key(key: &str) -> (u16, &str) {
+// used to build accelerators table from Key
-    match key.to_uppercase().as_str() {
+fn key_to_vk(key: &Code) -> VIRTUAL_KEY {
-        "SPACE" => (0x20, "Space"),
+    match key {
-        "BACKSPACE" => (0x08, "Backspace"),
+        Code::KeyA => unsafe { VkKeyScanW('a' as u16) as u16 },
-        "TAB" => (0x09, "Tab"),
+        Code::KeyB => unsafe { VkKeyScanW('b' as u16) as u16 },
-        "ENTER" | "RETURN" => (0x0D, "Enter"),
+        Code::KeyC => unsafe { VkKeyScanW('c' as u16) as u16 },
-        "CAPSLOCK" => (0x14, "Caps Lock"),
+        Code::KeyD => unsafe { VkKeyScanW('d' as u16) as u16 },
-        "ESC" | "ESCAPE" => (0x1B, "Esc"),
+        Code::KeyE => unsafe { VkKeyScanW('e' as u16) as u16 },
-        "PAGEUP" => (0x21, "Page Up"),
+        Code::KeyF => unsafe { VkKeyScanW('f' as u16) as u16 },
-        "PAGEDOWN" => (0x22, "Page Down"),
+        Code::KeyG => unsafe { VkKeyScanW('g' as u16) as u16 },
-        "END" => (0x23, "End"),
+        Code::KeyH => unsafe { VkKeyScanW('h' as u16) as u16 },
-        "HOME" => (0x24, "Home"),
+        Code::KeyI => unsafe { VkKeyScanW('i' as u16) as u16 },
-        "LEFTARROW" => (0x25, "Left Arrow"),
+        Code::KeyJ => unsafe { VkKeyScanW('j' as u16) as u16 },
-        "UPARROW" => (0x26, "Up Arrow"),
+        Code::KeyK => unsafe { VkKeyScanW('k' as u16) as u16 },
-        "RIGHTARROW" => (0x27, "Right Arrow"),
+        Code::KeyL => unsafe { VkKeyScanW('l' as u16) as u16 },
-        "DOWNARROW" => (0x28, "Down Arrow"),
+        Code::KeyM => unsafe { VkKeyScanW('m' as u16) as u16 },
-        "DELETE" => (0x2E, "Del"),
+        Code::KeyN => unsafe { VkKeyScanW('n' as u16) as u16 },
-        "0" => (0x30, "0"),
+        Code::KeyO => unsafe { VkKeyScanW('o' as u16) as u16 },
-        "1" => (0x31, "1"),
+        Code::KeyP => unsafe { VkKeyScanW('p' as u16) as u16 },
-        "2" => (0x32, "2"),
+        Code::KeyQ => unsafe { VkKeyScanW('q' as u16) as u16 },
-        "3" => (0x33, "3"),
+        Code::KeyR => unsafe { VkKeyScanW('r' as u16) as u16 },
-        "4" => (0x34, "4"),
+        Code::KeyS => unsafe { VkKeyScanW('s' as u16) as u16 },
-        "5" => (0x35, "5"),
+        Code::KeyT => unsafe { VkKeyScanW('t' as u16) as u16 },
-        "6" => (0x36, "6"),
+        Code::KeyU => unsafe { VkKeyScanW('u' as u16) as u16 },
-        "7" => (0x37, "7"),
+        Code::KeyV => unsafe { VkKeyScanW('v' as u16) as u16 },
-        "8" => (0x38, "8"),
+        Code::KeyW => unsafe { VkKeyScanW('w' as u16) as u16 },
-        "9" => (0x39, "9"),
+        Code::KeyX => unsafe { VkKeyScanW('x' as u16) as u16 },
-        "A" => (0x41, "A"),
+        Code::KeyY => unsafe { VkKeyScanW('y' as u16) as u16 },
-        "B" => (0x42, "B"),
+        Code::KeyZ => unsafe { VkKeyScanW('z' as u16) as u16 },
-        "C" => (0x43, "C"),
+        Code::Digit0 => unsafe { VkKeyScanW('0' as u16) as u16 },
-        "D" => (0x44, "D"),
+        Code::Digit1 => unsafe { VkKeyScanW('1' as u16) as u16 },
-        "E" => (0x45, "E"),
+        Code::Digit2 => unsafe { VkKeyScanW('2' as u16) as u16 },
-        "F" => (0x46, "F"),
+        Code::Digit3 => unsafe { VkKeyScanW('3' as u16) as u16 },
-        "G" => (0x47, "G"),
+        Code::Digit4 => unsafe { VkKeyScanW('4' as u16) as u16 },
-        "H" => (0x48, "H"),
+        Code::Digit5 => unsafe { VkKeyScanW('5' as u16) as u16 },
-        "I" => (0x49, "I"),
+        Code::Digit6 => unsafe { VkKeyScanW('6' as u16) as u16 },
-        "J" => (0x4A, "J"),
+        Code::Digit7 => unsafe { VkKeyScanW('7' as u16) as u16 },
-        "K" => (0x4B, "K"),
+        Code::Digit8 => unsafe { VkKeyScanW('8' as u16) as u16 },
-        "L" => (0x4C, "L"),
+        Code::Digit9 => unsafe { VkKeyScanW('9' as u16) as u16 },
-        "M" => (0x4D, "M"),
+        Code::Comma => VK_OEM_COMMA,
-        "N" => (0x4E, "N"),
+        Code::Minus => VK_OEM_MINUS,
-        "O" => (0x4F, "O"),
+        Code::Period => VK_OEM_PERIOD,
-        "P" => (0x50, "P"),
+        Code::Equal => unsafe { VkKeyScanW('=' as u16) as u16 },
-        "Q" => (0x51, "Q"),
+        Code::Semicolon => unsafe { VkKeyScanW(';' as u16) as u16 },
-        "R" => (0x52, "R"),
+        Code::Slash => unsafe { VkKeyScanW('/' as u16) as u16 },
-        "S" => (0x53, "S"),
+        Code::Backslash => unsafe { VkKeyScanW('\\' as u16) as u16 },
-        "T" => (0x54, "T"),
+        Code::Quote => unsafe { VkKeyScanW('\'' as u16) as u16 },
-        "U" => (0x55, "U"),
+        Code::Backquote => unsafe { VkKeyScanW('`' as u16) as u16 },
-        "V" => (0x56, "V"),
+        Code::BracketLeft => unsafe { VkKeyScanW('[' as u16) as u16 },
-        "W" => (0x57, "W"),
+        Code::BracketRight => unsafe { VkKeyScanW(']' as u16) as u16 },
-        "X" => (0x58, "X"),
+        Code::Backspace => VK_BACK,
-        "Y" => (0x59, "Y"),
+        Code::Tab => VK_TAB,
-        "Z" => (0x5A, "Z"),
+        Code::Space => VK_SPACE,
-        "NUM0" | "NUMPAD0" => (0x60, "Num 0"),
+        Code::Enter => VK_RETURN,
-        "NUM1" | "NUMPAD1" => (0x61, "Num 1"),
+        Code::Pause => VK_PAUSE,
-        "NUM2" | "NUMPAD2" => (0x62, "Num 2"),
+        Code::CapsLock => VK_CAPITAL,
-        "NUM3" | "NUMPAD3" => (0x63, "Num 3"),
+        Code::KanaMode => VK_KANA,
-        "NUM4" | "NUMPAD4" => (0x64, "Num 4"),
+        Code::Escape => VK_ESCAPE,
-        "NUM5" | "NUMPAD5" => (0x65, "Num 5"),
+        Code::NonConvert => VK_NONCONVERT,
-        "NUM6" | "NUMPAD6" => (0x66, "Num 6"),
+        Code::PageUp => VK_PRIOR,
-        "NUM7" | "NUMPAD7" => (0x67, "Num 7"),
+        Code::PageDown => VK_NEXT,
-        "NUM8" | "NUMPAD8" => (0x68, "Num 8"),
+        Code::End => VK_END,
-        "NUM9" | "NUMPAD9" => (0x69, "Num 9"),
+        Code::Home => VK_HOME,
-        _ => panic!("Unsupported modifier: {}", key),
+        Code::ArrowLeft => VK_LEFT,
+        Code::ArrowUp => VK_UP,
+        Code::ArrowRight => VK_RIGHT,
+        Code::ArrowDown => VK_DOWN,
+        Code::PrintScreen => VK_SNAPSHOT,
+        Code::Insert => VK_INSERT,
+        Code::Delete => VK_DELETE,
+        Code::Help => VK_HELP,
+        Code::ContextMenu => VK_APPS,
+        Code::F1 => VK_F1,
+        Code::F2 => VK_F2,
+        Code::F3 => VK_F3,
+        Code::F4 => VK_F4,
+        Code::F5 => VK_F5,
+        Code::F6 => VK_F6,
+        Code::F7 => VK_F7,
+        Code::F8 => VK_F8,
+        Code::F9 => VK_F9,
+        Code::F10 => VK_F10,
+        Code::F11 => VK_F11,
+        Code::F12 => VK_F12,
+        Code::F13 => VK_F13,
+        Code::F14 => VK_F14,
+        Code::F15 => VK_F15,
+        Code::F16 => VK_F16,
+        Code::F17 => VK_F17,
+        Code::F18 => VK_F18,
+        Code::F19 => VK_F19,
+        Code::F20 => VK_F20,
+        Code::F21 => VK_F21,
+        Code::F22 => VK_F22,
+        Code::F23 => VK_F23,
+        Code::F24 => VK_F24,
+        Code::NumLock => VK_NUMLOCK,
+        Code::ScrollLock => VK_SCROLL,
+        Code::BrowserBack => VK_BROWSER_BACK,
+        Code::BrowserForward => VK_BROWSER_FORWARD,
+        Code::BrowserRefresh => VK_BROWSER_REFRESH,
+        Code::BrowserStop => VK_BROWSER_STOP,
+        Code::BrowserSearch => VK_BROWSER_SEARCH,
+        Code::BrowserFavorites => VK_BROWSER_FAVORITES,
+        Code::BrowserHome => VK_BROWSER_HOME,
+        Code::AudioVolumeMute => VK_VOLUME_MUTE,
+        Code::AudioVolumeDown => VK_VOLUME_DOWN,
+        Code::AudioVolumeUp => VK_VOLUME_UP,
+        Code::MediaTrackNext => VK_MEDIA_NEXT_TRACK,
+        Code::MediaTrackPrevious => VK_MEDIA_PREV_TRACK,
+        Code::MediaStop => VK_MEDIA_STOP,
+        Code::MediaPlayPause => VK_MEDIA_PLAY_PAUSE,
+        Code::LaunchMail => VK_LAUNCH_MAIL,
+        Code::Convert => VK_CONVERT,
+        key => panic!("Unsupported modifier: {}", key),
+    }
+}
+
+impl fmt::Display for Accelerator {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let key_mods: Modifiers = self.mods;
+        if key_mods.contains(Modifiers::CONTROL) {
+            write!(f, "Ctrl+")?;
+        }
+        if key_mods.contains(Modifiers::SHIFT) {
+            write!(f, "Shift+")?;
+        }
+        if key_mods.contains(Modifiers::ALT) {
+            write!(f, "Alt+")?;
+        }
+        if key_mods.contains(Modifiers::SUPER) {
+            write!(f, "Windows+")?;
+        }
+        match &self.key {
+            Code::KeyA => write!(f, "A"),
+            Code::KeyB => write!(f, "B"),
+            Code::KeyC => write!(f, "C"),
+            Code::KeyD => write!(f, "D"),
+            Code::KeyE => write!(f, "E"),
+            Code::KeyF => write!(f, "F"),
+            Code::KeyG => write!(f, "G"),
+            Code::KeyH => write!(f, "H"),
+            Code::KeyI => write!(f, "I"),
+            Code::KeyJ => write!(f, "J"),
+            Code::KeyK => write!(f, "K"),
+            Code::KeyL => write!(f, "L"),
+            Code::KeyM => write!(f, "M"),
+            Code::KeyN => write!(f, "N"),
+            Code::KeyO => write!(f, "O"),
+            Code::KeyP => write!(f, "P"),
+            Code::KeyQ => write!(f, "Q"),
+            Code::KeyR => write!(f, "R"),
+            Code::KeyS => write!(f, "S"),
+            Code::KeyT => write!(f, "T"),
+            Code::KeyU => write!(f, "U"),
+            Code::KeyV => write!(f, "V"),
+            Code::KeyW => write!(f, "W"),
+            Code::KeyX => write!(f, "X"),
+            Code::KeyY => write!(f, "Y"),
+            Code::KeyZ => write!(f, "Z"),
+            Code::Digit0 => write!(f, "0"),
+            Code::Digit1 => write!(f, "1"),
+            Code::Digit2 => write!(f, "2"),
+            Code::Digit3 => write!(f, "3"),
+            Code::Digit4 => write!(f, "4"),
+            Code::Digit5 => write!(f, "5"),
+            Code::Digit6 => write!(f, "6"),
+            Code::Digit7 => write!(f, "7"),
+            Code::Digit8 => write!(f, "8"),
+            Code::Digit9 => write!(f, "9"),
+            Code::Comma => write!(f, ","),
+            Code::Minus => write!(f, "-"),
+            Code::Period => write!(f, "."),
+            Code::Space => write!(f, "Space"),
+            Code::Equal => write!(f, "="),
+            Code::Semicolon => write!(f, ";"),
+            Code::Slash => write!(f, "/"),
+            Code::Backslash => write!(f, "\\"),
+            Code::Quote => write!(f, "\'"),
+            Code::Backquote => write!(f, "`"),
+            Code::BracketLeft => write!(f, "["),
+            Code::BracketRight => write!(f, "]"),
+            Code::Tab => write!(f, "Tab"),
+            Code::Escape => write!(f, "Esc"),
+            Code::Delete => write!(f, "Del"),
+            Code::Insert => write!(f, "Ins"),
+            Code::PageUp => write!(f, "PgUp"),
+            Code::PageDown => write!(f, "PgDn"),
+            // These names match LibreOffice.
+            Code::ArrowLeft => write!(f, "Left"),
+            Code::ArrowRight => write!(f, "Right"),
+            Code::ArrowUp => write!(f, "Up"),
+            Code::ArrowDown => write!(f, "Down"),
+            _ => write!(f, "{:?}", self.key),
+        }
     }
 }

src/platform_impl/windows/mod.rs

@@ -3,7 +3,7 @@
 mod accelerator;
 mod util;
 
-use crate::{counter::Counter, NativeMenuItem};
+use crate::{accelerator::Accelerator, counter::Counter, NativeMenuItem};
 use once_cell::sync::Lazy;
 use std::{cell::RefCell, collections::HashMap, rc::Rc};
 use util::{decode_wide, encode_wide, LOWORD};
@@ -23,8 +23,6 @@ use windows_sys::Win32::{
     },
 };
 
-use self::accelerator::parse_accelerator;
-
 const COUNTER_START: u64 = 1000;
 static COUNTER: Counter = Counter::new_with_start(COUNTER_START);
 
@@ -195,7 +193,7 @@ impl Submenu {
         &mut self,
         label: S,
         enabled: bool,
-        accelerator: Option<&str>,
+        accelerator: Option<Accelerator>,
     ) -> MenuItem {
         let id = COUNTER.next();
         let mut flags = MF_STRING;
@@ -205,12 +203,8 @@ impl Submenu {
 
         let mut label = label.as_ref().to_string();
         if let Some(accelerator) = accelerator {
-            let (key, mods, accel_str) = parse_accelerator(accelerator);
+            let accel_str = accelerator.to_string();
-            let accel = ACCEL {
+            let accel = accelerator.to_accel(id as u16);
-                key,
-                fVirt: mods as _,
-                cmd: id as _,
-            };
 
             label.push_str("\t");
             label.push_str(&accel_str);
@@ -268,7 +262,7 @@ impl Submenu {
         label: S,
         enabled: bool,
         checked: bool,
-        accelerator: Option<&str>,
+        accelerator: Option<Accelerator>,
     ) -> CheckMenuItem {
         let mut item = CheckMenuItem(self.add_item(label, enabled, accelerator));
         item.set_checked(checked);