1use crate::{h_stack, prelude::*, Icon, IconElement, IconSize};
  2use gpui::{relative, rems, Action, FocusHandle, IntoElement, Keystroke};
  3
  4#[derive(IntoElement, Clone)]
  5pub struct KeyBinding {
  6    /// A keybinding consists of a key and a set of modifier keys.
  7    /// More then one keybinding produces a chord.
  8    ///
  9    /// This should always contain at least one element.
 10    key_binding: gpui::KeyBinding,
 11}
 12
 13impl RenderOnce for KeyBinding {
 14    fn render(self, cx: &mut WindowContext) -> impl IntoElement {
 15        h_stack()
 16            .flex_none()
 17            .gap_2()
 18            .children(self.key_binding.keystrokes().iter().map(|keystroke| {
 19                let key_icon = Self::icon_for_key(&keystroke);
 20
 21                h_stack()
 22                    .flex_none()
 23                    .gap_0p5()
 24                    .bg(cx.theme().colors().element_background)
 25                    .p_0p5()
 26                    .rounded_sm()
 27                    .when(keystroke.modifiers.function, |el| el.child(Key::new("fn")))
 28                    .when(keystroke.modifiers.control, |el| {
 29                        el.child(KeyIcon::new(Icon::Control))
 30                    })
 31                    .when(keystroke.modifiers.alt, |el| {
 32                        el.child(KeyIcon::new(Icon::Option))
 33                    })
 34                    .when(keystroke.modifiers.command, |el| {
 35                        el.child(KeyIcon::new(Icon::Command))
 36                    })
 37                    .when(keystroke.modifiers.shift, |el| {
 38                        el.child(KeyIcon::new(Icon::Shift))
 39                    })
 40                    .when_some(key_icon, |el, icon| el.child(KeyIcon::new(icon)))
 41                    .when(key_icon.is_none(), |el| {
 42                        el.child(Key::new(keystroke.key.to_uppercase().clone()))
 43                    })
 44            }))
 45    }
 46}
 47
 48impl KeyBinding {
 49    pub fn for_action(action: &dyn Action, cx: &mut WindowContext) -> Option<Self> {
 50        let key_binding = cx.bindings_for_action(action).last().cloned()?;
 51        Some(Self::new(key_binding))
 52    }
 53
 54    // like for_action(), but lets you specify the context from which keybindings
 55    // are matched.
 56    pub fn for_action_in(
 57        action: &dyn Action,
 58        focus: &FocusHandle,
 59        cx: &mut WindowContext,
 60    ) -> Option<Self> {
 61        let key_binding = cx.bindings_for_action_in(action, focus).last().cloned()?;
 62        Some(Self::new(key_binding))
 63    }
 64
 65    fn icon_for_key(keystroke: &Keystroke) -> Option<Icon> {
 66        match keystroke.key.as_str() {
 67            "left" => Some(Icon::ArrowLeft),
 68            "right" => Some(Icon::ArrowRight),
 69            "up" => Some(Icon::ArrowUp),
 70            "down" => Some(Icon::ArrowDown),
 71            "backspace" => Some(Icon::Backspace),
 72            "delete" => Some(Icon::Delete),
 73            _ => None,
 74        }
 75    }
 76
 77    pub fn new(key_binding: gpui::KeyBinding) -> Self {
 78        Self { key_binding }
 79    }
 80}
 81
 82#[derive(IntoElement)]
 83pub struct Key {
 84    key: SharedString,
 85}
 86
 87impl RenderOnce for Key {
 88    fn render(self, cx: &mut WindowContext) -> impl IntoElement {
 89        let single_char = self.key.len() == 1;
 90
 91        div()
 92            .py_0()
 93            .map(|this| {
 94                if single_char {
 95                    this.w(rems(14. / 16.)).flex().flex_none().justify_center()
 96                } else {
 97                    this.px_0p5()
 98                }
 99            })
100            .h(rems(14. / 16.))
101            .text_ui()
102            .line_height(relative(1.))
103            .text_color(cx.theme().colors().text)
104            .child(self.key.clone())
105    }
106}
107
108impl Key {
109    pub fn new(key: impl Into<SharedString>) -> Self {
110        Self { key: key.into() }
111    }
112}
113
114#[derive(IntoElement)]
115pub struct KeyIcon {
116    icon: Icon,
117}
118
119impl RenderOnce for KeyIcon {
120    fn render(self, _cx: &mut WindowContext) -> impl IntoElement {
121        div()
122            .w(rems(14. / 16.))
123            .child(IconElement::new(self.icon).size(IconSize::Small))
124    }
125}
126
127impl KeyIcon {
128    pub fn new(icon: Icon) -> Self {
129        Self { icon }
130    }
131}