1use gpui::{AnyElement, Div};
 2use smallvec::SmallVec;
 3
 4use crate::{prelude::*, v_stack, Label, ListHeader};
 5
 6#[derive(IntoElement)]
 7pub struct List {
 8    /// Message to display when the list is empty
 9    /// Defaults to "No items"
10    empty_message: SharedString,
11    header: Option<ListHeader>,
12    toggle: Option<bool>,
13    children: SmallVec<[AnyElement; 2]>,
14}
15
16impl List {
17    pub fn new() -> Self {
18        Self {
19            empty_message: "No items".into(),
20            header: None,
21            toggle: None,
22            children: SmallVec::new(),
23        }
24    }
25
26    pub fn empty_message(mut self, empty_message: impl Into<SharedString>) -> Self {
27        self.empty_message = empty_message.into();
28        self
29    }
30
31    pub fn header(mut self, header: impl Into<Option<ListHeader>>) -> Self {
32        self.header = header.into();
33        self
34    }
35
36    pub fn toggle(mut self, toggle: impl Into<Option<bool>>) -> Self {
37        self.toggle = toggle.into();
38        self
39    }
40}
41
42impl ParentElement for List {
43    fn children_mut(&mut self) -> &mut SmallVec<[AnyElement; 2]> {
44        &mut self.children
45    }
46}
47
48impl RenderOnce for List {
49    type Rendered = Div;
50
51    fn render(self, _cx: &mut WindowContext) -> Self::Rendered {
52        v_stack().w_full().py_1().children(self.header).map(|this| {
53            match (self.children.is_empty(), self.toggle) {
54                (false, _) => this.children(self.children),
55                (true, Some(false)) => this,
56                (true, _) => this.child(Label::new(self.empty_message.clone()).color(Color::Muted)),
57            }
58        })
59    }
60}