use std::rc::Rc; use gpui::{App, ElementId, IntoElement, RenderOnce};use heck::ToTitleCase as _;use ui::{    ButtonSize, ContextMenu, DropdownMenu, DropdownStyle, FluentBuilder as _, IconPosition, px,}; #[derive(IntoElement)]pub struct EnumVariantDropdown<T>where    T: strum::VariantArray + strum::VariantNames + Copy + PartialEq + Send + Sync + 'static,{    id: ElementId,    current_value: T,    variants: &'static [T],    labels: &'static [&'static str],    should_do_title_case: bool,    tab_index: Option<isize>,    on_change: Rc<dyn Fn(T, &mut App) + 'static>,} impl<T> EnumVariantDropdown<T>where    T: strum::VariantArray + strum::VariantNames + Copy + PartialEq + Send + Sync + 'static,{    pub fn new(        id: impl Into<ElementId>,        current_value: T,        variants: &'static [T],        labels: &'static [&'static str],        on_change: impl Fn(T, &mut App) + 'static,    ) -> Self {        Self {            id: id.into(),            current_value,            variants,            labels,            should_do_title_case: true,            tab_index: None,            on_change: Rc::new(on_change),        }    }     pub fn title_case(mut self, title_case: bool) -> Self {        self.should_do_title_case = title_case;        self    }     pub fn tab_index(mut self, tab_index: isize) -> Self {        self.tab_index = Some(tab_index);        self    }} impl<T> RenderOnce for EnumVariantDropdown<T>where    T: strum::VariantArray + strum::VariantNames + Copy + PartialEq + Send + Sync + 'static,{    fn render(self, window: &mut ui::Window, cx: &mut ui::App) -> impl gpui::IntoElement {        let current_value_label = self.labels[self            .variants            .iter()            .position(|v| *v == self.current_value)            .unwrap()];         let context_menu = window.use_keyed_state(current_value_label, cx, |window, cx| {            ContextMenu::new(window, cx, move |mut menu, _, _| {                for (&value, &label) in std::iter::zip(self.variants, self.labels) {                    let on_change = self.on_change.clone();                    let current_value = self.current_value;                    menu = menu.toggleable_entry(                        if self.should_do_title_case {                            label.to_title_case()                        } else {                            label.to_string()                        },                        value == current_value,                        IconPosition::End,                        None,                        move |_, cx| {                            on_change(value, cx);                        },                    );                }                menu            })        });         DropdownMenu::new(            self.id,            if self.should_do_title_case {                current_value_label.to_title_case()            } else {                current_value_label.to_string()            },            context_menu,        )        .when_some(self.tab_index, |elem, tab_index| elem.tab_index(tab_index))        .trigger_size(ButtonSize::Medium)        .style(DropdownStyle::Outlined)        .offset(gpui::Point {            x: px(0.0),            y: px(2.0),        })        .into_any_element()    }}