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//! Accordion component for displaying multiple collapsible sections.
//!
//! # Example
//!
//! ```ignore
//! use gpuikit::elements::accordion::{accordion, accordion_item, AccordionState};
//!
//! // Create an accordion with multiple items
//! let accordion_state = cx.new(|_cx| {
//! AccordionState::new(
//! accordion("my-accordion")
//! .item(accordion_item("section-1", "Section 1").content("Content for section 1"))
//! .item(accordion_item("section-2", "Section 2").content("Content for section 2"))
//! .item(accordion_item("section-3", "Section 3").content("Content for section 3"))
//! )
//! });
//!
//! // For single mode (only one item open at a time):
//! accordion("my-accordion").single()
//!
//! // For multiple mode (default, multiple items can be open):
//! accordion("my-accordion").multiple()
//! ```
use crate::icons::Icons;
use crate::theme::{ActiveTheme, Themeable};
use gpui::{
div, prelude::*, px, rems, Context, ElementId, EventEmitter, IntoElement, ParentElement,
Render, SharedString, Styled, Window,
};
use std::collections::HashSet;
/// Event emitted when accordion items are expanded or collapsed.
pub struct AccordionChanged {
/// The ID of the item that was toggled.
pub item_id: ElementId,
/// Whether the item is now expanded.
pub expanded: bool,
}
/// Mode for accordion behavior.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub enum AccordionMode {
/// Only one item can be open at a time.
Single,
/// Multiple items can be open simultaneously.
#[default]
Multiple,
}
/// A single item within an accordion.
pub struct AccordionItem {
id: ElementId,
header: SharedString,
content: Option<SharedString>,
disabled: bool,
}
impl AccordionItem {
/// Create a new accordion item with a header.
pub fn new(id: impl Into<ElementId>, header: impl Into<SharedString>) -> Self {
Self {
id: id.into(),
header: header.into(),
content: None,
disabled: false,
}
}
/// Set the content of the accordion item.
pub fn content(mut self, content: impl Into<SharedString>) -> Self {
self.content = Some(content.into());
self
}
/// Set whether this item is disabled.
pub fn disabled(mut self, disabled: bool) -> Self {
self.disabled = disabled;
self
}
}
/// Creates a new accordion item.
pub fn accordion_item(id: impl Into<ElementId>, header: impl Into<SharedString>) -> AccordionItem {
AccordionItem::new(id, header)
}
/// Builder for creating an accordion component.
pub struct Accordion {
id: ElementId,
items: Vec<AccordionItem>,
mode: AccordionMode,
default_expanded: HashSet<ElementId>,
}
impl Accordion {
/// Create a new accordion.
pub fn new(id: impl Into<ElementId>) -> Self {
Self {
id: id.into(),
items: Vec::new(),
mode: AccordionMode::Multiple,
default_expanded: HashSet::new(),
}
}
/// Add an item to the accordion.
pub fn item(mut self, item: AccordionItem) -> Self {
self.items.push(item);
self
}
/// Set the accordion to single mode (only one item open at a time).
pub fn single(mut self) -> Self {
self.mode = AccordionMode::Single;
self
}
/// Set the accordion to multiple mode (multiple items can be open).
pub fn multiple(mut self) -> Self {
self.mode = AccordionMode::Multiple;
self
}
/// Set the mode of the accordion.
pub fn mode(mut self, mode: AccordionMode) -> Self {
self.mode = mode;
self
}
/// Set an item to be expanded by default.
pub fn default_expanded(mut self, item_id: impl Into<ElementId>) -> Self {
self.default_expanded.insert(item_id.into());
self
}
}
/// Creates a new accordion builder.
pub fn accordion(id: impl Into<ElementId>) -> Accordion {
Accordion::new(id)
}
/// Stateful accordion component that manages expanded/collapsed state.
pub struct AccordionState {
id: ElementId,
items: Vec<AccordionItem>,
mode: AccordionMode,
expanded: HashSet<ElementId>,
}
impl EventEmitter<AccordionChanged> for AccordionState {}
impl AccordionState {
/// Create a new accordion state from an accordion builder.
pub fn new(accordion: Accordion) -> Self {
Self {
id: accordion.id,
items: accordion.items,
mode: accordion.mode,
expanded: accordion.default_expanded,
}
}
/// Check if an item is expanded.
pub fn is_expanded(&self, item_id: &ElementId) -> bool {
self.expanded.contains(item_id)
}
/// Toggle an item's expanded state.
pub fn toggle(&mut self, item_id: ElementId, cx: &mut Context<Self>) {
// Find the item and check if it's disabled
let item = self.items.iter().find(|i| i.id == item_id);
if let Some(item) = item {
if item.disabled {
return;
}
}
let was_expanded = self.expanded.contains(&item_id);
if was_expanded {
self.expanded.remove(&item_id);
} else {
if self.mode == AccordionMode::Single {
self.expanded.clear();
}
self.expanded.insert(item_id.clone());
}
cx.emit(AccordionChanged {
item_id,
expanded: !was_expanded,
});
cx.notify();
}
/// Expand an item.
pub fn expand(&mut self, item_id: ElementId, cx: &mut Context<Self>) {
if !self.expanded.contains(&item_id) {
if self.mode == AccordionMode::Single {
self.expanded.clear();
}
self.expanded.insert(item_id.clone());
cx.emit(AccordionChanged {
item_id,
expanded: true,
});
cx.notify();
}
}
/// Collapse an item.
pub fn collapse(&mut self, item_id: ElementId, cx: &mut Context<Self>) {
if self.expanded.remove(&item_id) {
cx.emit(AccordionChanged {
item_id,
expanded: false,
});
cx.notify();
}
}
/// Collapse all items.
pub fn collapse_all(&mut self, cx: &mut Context<Self>) {
self.expanded.clear();
cx.notify();
}
/// Expand all items (only works in multiple mode).
pub fn expand_all(&mut self, cx: &mut Context<Self>) {
if self.mode == AccordionMode::Multiple {
for item in &self.items {
if !item.disabled {
self.expanded.insert(item.id.clone());
}
}
cx.notify();
}
}
}
impl Render for AccordionState {
fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
let theme = cx.theme();
div()
.id(self.id.clone())
.flex()
.flex_col()
.w_full()
.border_1()
.border_color(theme.border())
.rounded(rems(0.5))
.overflow_hidden()
.children(self.items.iter().enumerate().map(|(index, item)| {
let is_expanded = self.expanded.contains(&item.id);
let is_first = index == 0;
let is_last = index == self.items.len() - 1;
let item_id = item.id.clone();
let header = item.header.clone();
let content = item.content.clone();
let disabled = item.disabled;
let theme = cx.theme();
div()
.flex()
.flex_col()
.when(!is_first, |this| {
this.border_t_1().border_color(theme.border_subtle())
})
.child(
// Header
div()
.id(item_id.clone())
.flex()
.items_center()
.justify_between()
.px(rems(0.75))
.py(rems(0.5))
.bg(theme.surface())
.when(!disabled, |this| {
this.cursor_pointer()
.hover(|style| style.bg(theme.surface_secondary()))
.on_click(cx.listener(move |this, _, _window, cx| {
this.toggle(item_id.clone(), cx);
}))
})
.when(disabled, |this| this.cursor_not_allowed().opacity(0.5))
.child(
div()
.text_sm()
.font_weight(gpui::FontWeight::MEDIUM)
.text_color(if disabled {
theme.fg_disabled()
} else {
theme.fg()
})
.child(header),
)
.child(
div().flex().items_center().justify_center().child(
if is_expanded {
Icons::chevron_down()
} else {
Icons::chevron_right()
}
.size(px(14.))
.text_color(theme.fg_muted()),
),
),
)
.when(is_expanded, |this| {
this.child(
// Content
div()
.px(rems(0.75))
.py(rems(0.5))
.bg(theme.surface())
.border_t_1()
.border_color(theme.border_subtle())
.when(!is_last, |this| this.border_b_0())
.child(
div()
.text_sm()
.text_color(theme.fg_muted())
.when_some(content, |this, content| this.child(content)),
),
)
})
}))
}
}