use crate::{Action, AppContext, Platform, SharedString};use util::ResultExt; /// A menu of the application, either a main menu or a submenupub struct Menu {    /// The name of the menu    pub name: SharedString,     /// The items in the menu    pub items: Vec<MenuItem>,} impl Menu {    /// Create an OwnedMenu from this Menu    pub fn owned(self) -> OwnedMenu {        OwnedMenu {            name: self.name.to_string().into(),            items: self.items.into_iter().map(|item| item.owned()).collect(),        }    }} /// The different kinds of items that can be in a menupub enum MenuItem {    /// A separator between items    Separator,     /// A submenu    Submenu(Menu),     /// An action that can be performed    Action {        /// The name of this menu item        name: SharedString,         /// the action to perform when this menu item is selected        action: Box<dyn Action>,         /// The OS Action that corresponds to this action, if any        /// See [`OsAction`] for more information        os_action: Option<OsAction>,    },} impl MenuItem {    /// Creates a new menu item that is a separator    pub fn separator() -> Self {        Self::Separator    }     /// Creates a new menu item that is a submenu    pub fn submenu(menu: Menu) -> Self {        Self::Submenu(menu)    }     /// Creates a new menu item that invokes an action    pub fn action(name: impl Into<SharedString>, action: impl Action) -> Self {        Self::Action {            name: name.into(),            action: Box::new(action),            os_action: None,        }    }     /// Creates a new menu item that invokes an action and has an OS action    pub fn os_action(        name: impl Into<SharedString>,        action: impl Action,        os_action: OsAction,    ) -> Self {        Self::Action {            name: name.into(),            action: Box::new(action),            os_action: Some(os_action),        }    }     /// Create an OwnedMenuItem from this MenuItem    pub fn owned(self) -> OwnedMenuItem {        match self {            MenuItem::Separator => OwnedMenuItem::Separator,            MenuItem::Submenu(submenu) => OwnedMenuItem::Submenu(submenu.owned()),            MenuItem::Action {                name,                action,                os_action,            } => OwnedMenuItem::Action {                name: name.into(),                action,                os_action,            },        }    }} /// A menu of the application, either a main menu or a submenu#[derive(Clone)]pub struct OwnedMenu {    /// The name of the menu    pub name: SharedString,     /// The items in the menu    pub items: Vec<OwnedMenuItem>,} /// The different kinds of items that can be in a menupub enum OwnedMenuItem {    /// A separator between items    Separator,     /// A submenu    Submenu(OwnedMenu),     /// An action that can be performed    Action {        /// The name of this menu item        name: String,         /// the action to perform when this menu item is selected        action: Box<dyn Action>,         /// The OS Action that corresponds to this action, if any        /// See [`OsAction`] for more information        os_action: Option<OsAction>,    },} impl Clone for OwnedMenuItem {    fn clone(&self) -> Self {        match self {            OwnedMenuItem::Separator => OwnedMenuItem::Separator,            OwnedMenuItem::Submenu(submenu) => OwnedMenuItem::Submenu(submenu.clone()),            OwnedMenuItem::Action {                name,                action,                os_action,            } => OwnedMenuItem::Action {                name: name.clone(),                action: action.boxed_clone(),                os_action: *os_action,            },        }    }} // TODO: As part of the global selections refactor, these should// be moved to GPUI-provided actions that make this association// without leaking the platform details to GPUI users /// OS actions are actions that are recognized by the operating system/// This allows the operating system to provide specialized behavior for/// these actions#[derive(Copy, Clone, Eq, PartialEq)]pub enum OsAction {    /// The 'cut' action    Cut,     /// The 'copy' action    Copy,     /// The 'paste' action    Paste,     /// The 'select all' action    SelectAll,     /// The 'undo' action    Undo,     /// The 'redo' action    Redo,} pub(crate) fn init_app_menus(platform: &dyn Platform, cx: &AppContext) {    platform.on_will_open_app_menu(Box::new({        let cx = cx.to_async();        move || {            cx.update(|cx| cx.clear_pending_keystrokes()).ok();        }    }));     platform.on_validate_app_menu_command(Box::new({        let cx = cx.to_async();        move |action| {            cx.update(|cx| cx.is_action_available(action))                .unwrap_or(false)        }    }));     platform.on_app_menu_action(Box::new({        let cx = cx.to_async();        move |action| {            cx.update(|cx| cx.dispatch_action(action)).log_err();        }    }));}