use crate::{h_flex, prelude::*, Icon, IconName, IconSize};use gpui::{relative, Action, FocusHandle, IntoElement, Keystroke}; #[derive(IntoElement, Clone)]pub struct KeyBinding {    /// A keybinding consists of a key and a set of modifier keys.    /// More then one keybinding produces a chord.    ///    /// This should always contain at least one element.    key_binding: gpui::KeyBinding,     /// The [`PlatformStyle`] to use when displaying this keybinding.    platform_style: PlatformStyle,} impl KeyBinding {    pub fn for_action(action: &dyn Action, cx: &mut WindowContext) -> Option<Self> {        let key_binding = cx.bindings_for_action(action).last().cloned()?;        Some(Self::new(key_binding))    }     // like for_action(), but lets you specify the context from which keybindings    // are matched.    pub fn for_action_in(        action: &dyn Action,        focus: &FocusHandle,        cx: &mut WindowContext,    ) -> Option<Self> {        let key_binding = cx.bindings_for_action_in(action, focus).last().cloned()?;        Some(Self::new(key_binding))    }     fn icon_for_key(&self, keystroke: &Keystroke) -> Option<IconName> {        match keystroke.key.as_str() {            "left" => Some(IconName::ArrowLeft),            "right" => Some(IconName::ArrowRight),            "up" => Some(IconName::ArrowUp),            "down" => Some(IconName::ArrowDown),            "backspace" => Some(IconName::Backspace),            "delete" => Some(IconName::Delete),            "return" => Some(IconName::Return),            "enter" => Some(IconName::Return),            "tab" => Some(IconName::Tab),            "space" => Some(IconName::Space),            "escape" => Some(IconName::Escape),            "pagedown" => Some(IconName::PageDown),            "pageup" => Some(IconName::PageUp),            "shift" if self.platform_style == PlatformStyle::Mac => Some(IconName::Shift),            "control" if self.platform_style == PlatformStyle::Mac => Some(IconName::Control),            "platform" if self.platform_style == PlatformStyle::Mac => Some(IconName::Command),            "function" if self.platform_style == PlatformStyle::Mac => Some(IconName::Control),            "alt" if self.platform_style == PlatformStyle::Mac => Some(IconName::Option),            _ => None,        }    }     pub fn new(key_binding: gpui::KeyBinding) -> Self {        Self {            key_binding,            platform_style: PlatformStyle::platform(),        }    }     /// Sets the [`PlatformStyle`] for this [`KeyBinding`].    pub fn platform_style(mut self, platform_style: PlatformStyle) -> Self {        self.platform_style = platform_style;        self    }} impl RenderOnce for KeyBinding {    fn render(self, cx: &mut WindowContext) -> impl IntoElement {        h_flex()            .debug_selector(|| {                format!(                    "KEY_BINDING-{}",                    self.key_binding                        .keystrokes()                        .iter()                        .map(|k| k.key.to_string())                        .collect::<Vec<_>>()                        .join(" ")                )            })            .gap(Spacing::Small.rems(cx))            .flex_none()            .children(self.key_binding.keystrokes().iter().map(|keystroke| {                let key_icon = self.icon_for_key(keystroke);                 h_flex()                    .flex_none()                    .py_0p5()                    .rounded_sm()                    .text_color(cx.theme().colors().text_muted)                    .when(keystroke.modifiers.function, |el| {                        match self.platform_style {                            PlatformStyle::Mac => el.child(Key::new("fn")),                            PlatformStyle::Linux | PlatformStyle::Windows => {                                el.child(Key::new("Fn")).child(Key::new("+"))                            }                        }                    })                    .when(keystroke.modifiers.control, |el| {                        match self.platform_style {                            PlatformStyle::Mac => el.child(KeyIcon::new(IconName::Control)),                            PlatformStyle::Linux | PlatformStyle::Windows => {                                el.child(Key::new("Ctrl")).child(Key::new("+"))                            }                        }                    })                    .when(keystroke.modifiers.alt, |el| match self.platform_style {                        PlatformStyle::Mac => el.child(KeyIcon::new(IconName::Option)),                        PlatformStyle::Linux | PlatformStyle::Windows => {                            el.child(Key::new("Alt")).child(Key::new("+"))                        }                    })                    .when(keystroke.modifiers.platform, |el| {                        match self.platform_style {                            PlatformStyle::Mac => el.child(KeyIcon::new(IconName::Command)),                            PlatformStyle::Linux => {                                el.child(Key::new("Super")).child(Key::new("+"))                            }                            PlatformStyle::Windows => {                                el.child(Key::new("Win")).child(Key::new("+"))                            }                        }                    })                    .when(keystroke.modifiers.shift, |el| match self.platform_style {                        PlatformStyle::Mac => el.child(KeyIcon::new(IconName::Shift)),                        PlatformStyle::Linux | PlatformStyle::Windows => {                            el.child(Key::new("Shift")).child(Key::new("+"))                        }                    })                    .map(|el| match key_icon {                        Some(icon) => el.child(KeyIcon::new(icon)),                        None => el.child(Key::new(keystroke.key.to_uppercase())),                    })            }))    }} #[derive(IntoElement)]pub struct Key {    key: SharedString,} impl RenderOnce for Key {    fn render(self, cx: &mut WindowContext) -> impl IntoElement {        let single_char = self.key.len() == 1;         div()            .py_0()            .map(|this| {                if single_char {                    this.w(rems_from_px(14.))                        .flex()                        .flex_none()                        .justify_center()                } else {                    this.px_0p5()                }            })            .h(rems_from_px(14.))            .text_ui(cx)            .line_height(relative(1.))            .text_color(cx.theme().colors().text_muted)            .child(self.key.clone())    }} impl Key {    pub fn new(key: impl Into<SharedString>) -> Self {        Self { key: key.into() }    }} #[derive(IntoElement)]pub struct KeyIcon {    icon: IconName,} impl RenderOnce for KeyIcon {    fn render(self, _cx: &mut WindowContext) -> impl IntoElement {        Icon::new(self.icon)            .size(IconSize::Small)            .color(Color::Muted)    }} impl KeyIcon {    pub fn new(icon: IconName) -> Self {        Self { icon }    }}