1use crate::{h_stack, prelude::*, Icon, IconElement, IconSize};
  2use gpui::{relative, rems, Action, Div, 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    type Rendered = Div;
 15
 16    fn render(self, cx: &mut WindowContext) -> Self::Rendered {
 17        h_stack()
 18            .flex_none()
 19            .gap_2()
 20            .children(self.key_binding.keystrokes().iter().map(|keystroke| {
 21                let key_icon = Self::icon_for_key(&keystroke);
 22
 23                h_stack()
 24                    .flex_none()
 25                    .gap_0p5()
 26                    .bg(cx.theme().colors().element_background)
 27                    .p_0p5()
 28                    .rounded_sm()
 29                    .when(keystroke.modifiers.function, |el| el.child(Key::new("fn")))
 30                    .when(keystroke.modifiers.control, |el| {
 31                        el.child(KeyIcon::new(Icon::Control))
 32                    })
 33                    .when(keystroke.modifiers.alt, |el| {
 34                        el.child(KeyIcon::new(Icon::Option))
 35                    })
 36                    .when(keystroke.modifiers.command, |el| {
 37                        el.child(KeyIcon::new(Icon::Command))
 38                    })
 39                    .when(keystroke.modifiers.shift, |el| {
 40                        el.child(KeyIcon::new(Icon::Shift))
 41                    })
 42                    .when_some(key_icon, |el, icon| el.child(KeyIcon::new(icon)))
 43                    .when(key_icon.is_none(), |el| {
 44                        el.child(Key::new(keystroke.key.to_uppercase().clone()))
 45                    })
 46            }))
 47    }
 48}
 49
 50impl KeyBinding {
 51    pub fn for_action(action: &dyn Action, cx: &mut WindowContext) -> Option<Self> {
 52        // todo! this last is arbitrary, we want to prefer users key bindings over defaults,
 53        // and vim over normal (in vim mode), etc.
 54        let key_binding = cx.bindings_for_action(action).last().cloned()?;
 55        Some(Self::new(key_binding))
 56    }
 57
 58    fn icon_for_key(keystroke: &Keystroke) -> Option<Icon> {
 59        let mut icon: Option<Icon> = None;
 60
 61        if keystroke.key == "left".to_string() {
 62            icon = Some(Icon::ArrowLeft);
 63        } else if keystroke.key == "right".to_string() {
 64            icon = Some(Icon::ArrowRight);
 65        } else if keystroke.key == "up".to_string() {
 66            icon = Some(Icon::ArrowUp);
 67        } else if keystroke.key == "down".to_string() {
 68            icon = Some(Icon::ArrowDown);
 69        }
 70
 71        icon
 72    }
 73
 74    pub fn new(key_binding: gpui::KeyBinding) -> Self {
 75        Self { key_binding }
 76    }
 77}
 78
 79#[derive(IntoElement)]
 80pub struct Key {
 81    key: SharedString,
 82}
 83
 84impl RenderOnce for Key {
 85    type Rendered = Div;
 86
 87    fn render(self, cx: &mut WindowContext) -> Self::Rendered {
 88        let single_char = self.key.len() == 1;
 89
 90        div()
 91            .py_0()
 92            .when(single_char, |el| {
 93                el.w(rems(14. / 16.)).flex().flex_none().justify_center()
 94            })
 95            .when(!single_char, |el| el.px_0p5())
 96            .h(rems(14. / 16.))
 97            .text_ui()
 98            .line_height(relative(1.))
 99            .text_color(cx.theme().colors().text)
100            .child(self.key.clone())
101    }
102}
103
104impl Key {
105    pub fn new(key: impl Into<SharedString>) -> Self {
106        Self { key: key.into() }
107    }
108}
109
110#[derive(IntoElement)]
111pub struct KeyIcon {
112    icon: Icon,
113}
114
115impl RenderOnce for KeyIcon {
116    type Rendered = Div;
117
118    fn render(self, _cx: &mut WindowContext) -> Self::Rendered {
119        div()
120            .w(rems(14. / 16.))
121            .child(IconElement::new(self.icon).size(IconSize::Small))
122    }
123}
124
125impl KeyIcon {
126    pub fn new(icon: Icon) -> Self {
127        Self { icon }
128    }
129}