1use crate::{h_stack, prelude::*, Disclosure, Label};
  2use gpui::{AnyElement, ClickEvent, Div};
  3
  4#[derive(IntoElement)]
  5pub struct ListHeader {
  6    /// The label of the header.
  7    label: SharedString,
  8    /// A slot for content that appears before the label, like an icon or avatar.
  9    start_slot: Option<AnyElement>,
 10    /// A slot for content that appears after the label, usually on the other side of the header.
 11    /// This might be a button, a disclosure arrow, a face pile, etc.
 12    end_slot: Option<AnyElement>,
 13    /// A slot for content that appears on hover after the label
 14    /// It will obscure the `end_slot` when visible.
 15    end_hover_slot: Option<AnyElement>,
 16    toggle: Option<bool>,
 17    on_toggle: Option<Box<dyn Fn(&ClickEvent, &mut WindowContext) + 'static>>,
 18    inset: bool,
 19    selected: bool,
 20}
 21
 22impl ListHeader {
 23    pub fn new(label: impl Into<SharedString>) -> Self {
 24        Self {
 25            label: label.into(),
 26            start_slot: None,
 27            end_slot: None,
 28            end_hover_slot: None,
 29            inset: false,
 30            toggle: None,
 31            on_toggle: None,
 32            selected: false,
 33        }
 34    }
 35
 36    pub fn toggle(mut self, toggle: impl Into<Option<bool>>) -> Self {
 37        self.toggle = toggle.into();
 38        self
 39    }
 40
 41    pub fn on_toggle(
 42        mut self,
 43        on_toggle: impl Fn(&ClickEvent, &mut WindowContext) + 'static,
 44    ) -> Self {
 45        self.on_toggle = Some(Box::new(on_toggle));
 46        self
 47    }
 48
 49    pub fn start_slot<E: IntoElement>(mut self, start_slot: impl Into<Option<E>>) -> Self {
 50        self.start_slot = start_slot.into().map(IntoElement::into_any_element);
 51        self
 52    }
 53
 54    pub fn end_slot<E: IntoElement>(mut self, end_slot: impl Into<Option<E>>) -> Self {
 55        self.end_slot = end_slot.into().map(IntoElement::into_any_element);
 56        self
 57    }
 58
 59    pub fn end_hover_slot<E: IntoElement>(mut self, end_hover_slot: impl Into<Option<E>>) -> Self {
 60        self.end_hover_slot = end_hover_slot.into().map(IntoElement::into_any_element);
 61        self
 62    }
 63
 64    pub fn inset(mut self, inset: bool) -> Self {
 65        self.inset = inset;
 66        self
 67    }
 68}
 69
 70impl Selectable for ListHeader {
 71    fn selected(mut self, selected: bool) -> Self {
 72        self.selected = selected;
 73        self
 74    }
 75}
 76
 77impl RenderOnce for ListHeader {
 78    type Rendered = Div;
 79
 80    fn render(self, cx: &mut WindowContext) -> Self::Rendered {
 81        h_stack().w_full().relative().group("list_header").child(
 82            div()
 83                .h_7()
 84                .when(self.inset, |this| this.px_2())
 85                .when(self.selected, |this| {
 86                    this.bg(cx.theme().colors().ghost_element_selected)
 87                })
 88                .flex()
 89                .flex_1()
 90                .items_center()
 91                .justify_between()
 92                .w_full()
 93                .gap_1()
 94                .child(
 95                    h_stack()
 96                        .gap_1()
 97                        .children(
 98                            self.toggle
 99                                .map(|is_open| Disclosure::new(is_open).on_toggle(self.on_toggle)),
100                        )
101                        .child(
102                            div()
103                                .flex()
104                                .gap_1()
105                                .items_center()
106                                .children(self.start_slot)
107                                .child(Label::new(self.label.clone()).color(Color::Muted)),
108                        ),
109                )
110                .child(h_stack().children(self.end_slot))
111                .when_some(self.end_hover_slot, |this, end_hover_slot| {
112                    this.child(
113                        div()
114                            .absolute()
115                            .right_0()
116                            .visible_on_hover("list_header")
117                            .child(end_hover_slot),
118                    )
119                }),
120        )
121    }
122}