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use component::{Component, ComponentScope, example_group_with_title, single_example};
use gpui::AnyElement;
use smallvec::SmallVec;
use crate::{Label, ListHeader, ListItem, ListItemSpacing, prelude::*};
pub enum EmptyMessage {
Text(SharedString),
Element(AnyElement),
}
#[derive(IntoElement, RegisterComponent)]
pub struct List {
/// Message to display when the list is empty
/// Defaults to "No items"
empty_message: EmptyMessage,
header: Option<ListHeader>,
toggle: Option<bool>,
children: SmallVec<[AnyElement; 2]>,
}
impl Default for List {
fn default() -> Self {
Self::new()
}
}
impl List {
pub fn new() -> Self {
Self {
empty_message: EmptyMessage::Text("No items".into()),
header: None,
toggle: None,
children: SmallVec::new(),
}
}
pub fn empty_message(mut self, message: impl Into<EmptyMessage>) -> Self {
self.empty_message = message.into();
self
}
pub fn header(mut self, header: impl Into<Option<ListHeader>>) -> Self {
self.header = header.into();
self
}
pub fn toggle(mut self, toggle: impl Into<Option<bool>>) -> Self {
self.toggle = toggle.into();
self
}
}
impl ParentElement for List {
fn extend(&mut self, elements: impl IntoIterator<Item = AnyElement>) {
self.children.extend(elements)
}
}
impl From<String> for EmptyMessage {
fn from(s: String) -> Self {
EmptyMessage::Text(SharedString::from(s))
}
}
impl From<&str> for EmptyMessage {
fn from(s: &str) -> Self {
EmptyMessage::Text(SharedString::from(s.to_owned()))
}
}
impl From<AnyElement> for EmptyMessage {
fn from(e: AnyElement) -> Self {
EmptyMessage::Element(e)
}
}
impl RenderOnce for List {
fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
v_flex()
.w_full()
.py(DynamicSpacing::Base04.rems(cx))
.children(self.header)
.map(|this| match (self.children.is_empty(), self.toggle) {
(false, _) => this.children(self.children),
(true, Some(false)) => this,
(true, _) => match self.empty_message {
EmptyMessage::Text(text) => {
this.px_2().child(Label::new(text).color(Color::Muted))
}
EmptyMessage::Element(element) => this.child(element),
},
})
}
}
impl Component for List {
fn scope() -> ComponentScope {
ComponentScope::Layout
}
fn description() -> Option<&'static str> {
Some(
"A container component for displaying a collection of list items with optional header and empty state.",
)
}
fn preview(_window: &mut Window, _cx: &mut App) -> Option<AnyElement> {
Some(
v_flex()
.gap_6()
.children(vec![
example_group_with_title(
"Basic Lists",
vec![
single_example(
"Simple List",
List::new()
.child(ListItem::new("item1").child(Label::new("Item 1")))
.child(ListItem::new("item2").child(Label::new("Item 2")))
.child(ListItem::new("item3").child(Label::new("Item 3")))
.into_any_element(),
),
single_example(
"With Header",
List::new()
.header(ListHeader::new("Section Header"))
.child(ListItem::new("item1").child(Label::new("Item 1")))
.child(ListItem::new("item2").child(Label::new("Item 2")))
.into_any_element(),
),
single_example(
"Empty List",
List::new()
.empty_message("No items to display")
.into_any_element(),
),
],
),
example_group_with_title(
"With Icons + Selected State",
vec![single_example(
"Team Members",
List::new()
.header(ListHeader::new("Team Members"))
.child(
ListItem::new("member-ada")
.start_slot(Icon::new(IconName::Check))
.toggle_state(true)
.child(Label::new("Ada Lovelace")),
)
.child(
ListItem::new("member-grace")
.start_slot(Icon::new(IconName::File))
.child(Label::new("Grace Hopper")),
)
.child(
ListItem::new("member-alan")
.start_slot(Icon::new(IconName::File))
.child(Label::new("Alan Turing")),
)
.into_any_element(),
)],
),
example_group_with_title(
"Density",
vec![
single_example(
"Dense",
List::new()
.child(
ListItem::new("dense-1")
.spacing(ListItemSpacing::Dense)
.child(Label::new("Invoice #1042")),
)
.child(
ListItem::new("dense-2")
.spacing(ListItemSpacing::Dense)
.child(Label::new("Invoice #1043")),
)
.into_any_element(),
),
single_example(
"Sparse",
List::new()
.child(
ListItem::new("sparse-1")
.spacing(ListItemSpacing::Sparse)
.child(Label::new("Invoice #1042")),
)
.child(
ListItem::new("sparse-2")
.spacing(ListItemSpacing::Sparse)
.child(Label::new("Invoice #1043")),
)
.into_any_element(),
),
],
),
])
.into_any_element(),
)
}
}