add tree
This commit is contained in:
@@ -14,5 +14,6 @@ gpui = { workspace = true, features = ["test-support"] }
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[features]
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default = ["full"]
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full = ["list"]
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full = ["list", "tree"]
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list = []
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tree = []
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@@ -3,3 +3,6 @@
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#[cfg(feature = "list")]
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pub mod list;
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#[cfg(feature = "tree")]
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pub mod tree;
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@@ -0,0 +1,439 @@
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use std::rc::Rc;
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use gpui::prelude::FluentBuilder as _;
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use gpui::{
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AnyElement, App, ElementId, FocusHandle, Hsla, InteractiveElement as _, IntoElement,
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KeyDownEvent, ParentElement as _, Pixels, RenderOnce, Role, SharedString,
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StatefulInteractiveElement as _, Styled as _, Window, div,
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};
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use gpui_native_icons::{IconRole, icon};
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use gpui_native_theme::ActiveTheme as _;
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/// The change reporter, fired with the next selection by pointer and keys.
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type ChangeHandler = Rc<dyn Fn(Option<usize>, &mut Window, &mut App)>;
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/// The disclosure reporter, fired with the toggled row's index.
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type DisclosureHandler = Rc<dyn Fn(usize, &mut Window, &mut App)>;
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type ItemsFn = Box<dyn Fn(&mut Window, &mut App) -> Vec<TreeItem>>;
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/// Tree item.
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#[derive(Clone)]
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pub struct TreeItem {
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label: SharedString,
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icon: Option<IconRole>,
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depth: usize,
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expandable: bool,
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expanded: bool,
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disabled: bool,
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}
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impl TreeItem {
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/// Creates a leaf row with this label at the root depth.
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pub fn new<L>(label: L) -> Self
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where
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L: Into<SharedString>,
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{
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Self {
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label: label.into(),
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icon: None,
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depth: 0,
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expandable: false,
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expanded: false,
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disabled: false,
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}
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}
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/// Shows an icon leading the label.
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pub fn icon(mut self, role: IconRole) -> Self {
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self.icon = Some(role);
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self
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}
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/// Nests the row one level per count.
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pub fn depth(mut self, depth: usize) -> Self {
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self.depth = depth;
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self
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}
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/// Marks the row as having children.
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pub fn expandable(mut self, expandable: bool) -> Self {
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self.expandable = expandable;
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self
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}
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/// Sets the row's disclosure state.
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pub fn expanded(mut self, expanded: bool) -> Self {
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self.expanded = expanded;
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self
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}
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/// Renders the row dimmed; clicks and keyboard skip it.
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pub fn disabled(mut self, disabled: bool) -> Self {
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self.disabled = disabled;
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self
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}
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}
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/// A tree.
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#[derive(IntoElement)]
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pub struct Tree {
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id: ElementId,
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selected: Option<usize>,
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a11y_label: Option<SharedString>,
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on_change: Option<ChangeHandler>,
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on_disclosure: Option<DisclosureHandler>,
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items: Option<ItemsFn>,
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}
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impl Tree {
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/// Creates a tree with nothing selected.
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pub fn new<I>(id: I) -> Self
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where
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I: Into<ElementId>,
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{
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Self {
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id: id.into(),
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selected: None,
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a11y_label: None,
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on_change: None,
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on_disclosure: None,
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items: None,
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}
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}
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/// Sets the current selection.
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pub fn selected(mut self, selected: Option<usize>) -> Self {
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self.selected = selected;
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self
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}
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/// Reports the next selection, from clicks and keys alike.
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pub fn on_change<F>(mut self, handler: F) -> Self
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where
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F: Fn(Option<usize>, &mut Window, &mut App) + 'static,
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{
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self.on_change = Some(Rc::new(handler));
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self
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}
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/// Reports the row whose disclosure the user toggled.
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pub fn on_disclosure<F>(mut self, handler: F) -> Self
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where
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F: Fn(usize, &mut Window, &mut App) + 'static,
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{
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self.on_disclosure = Some(Rc::new(handler));
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self
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}
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/// Sets the visible rows, built fresh each render.
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pub fn items<F>(mut self, items: F) -> Self
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where
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F: Fn(&mut Window, &mut App) -> Vec<TreeItem> + 'static,
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{
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self.items = Some(Box::new(items));
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self
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}
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/// Overrides the accessibility label, which defaults to the id.
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pub fn accessibility_label<L>(mut self, label: L) -> Self
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where
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L: Into<SharedString>,
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{
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self.a11y_label = Some(label.into());
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self
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}
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}
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struct TreeChrome {
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foreground: Hsla,
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muted: Hsla,
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muted_foreground: Hsla,
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primary: Hsla,
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primary_foreground: Hsla,
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radius_sm: Pixels,
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icon_size: Pixels,
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padding_x: Pixels,
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text_size: Pixels,
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/// The row count, for the rows' set-size a11y attributes.
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count: usize,
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}
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impl RenderOnce for Tree {
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fn render(self, window: &mut Window, cx: &mut App) -> impl IntoElement {
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let chrome = {
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let theme = cx.theme();
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TreeChrome {
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foreground: theme.colors.foreground,
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muted: theme.colors.muted,
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muted_foreground: theme.colors.muted_foreground,
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primary: theme.ramps.primary.base,
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primary_foreground: theme.colors.primary_foreground,
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radius_sm: theme.radius.sm,
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icon_size: theme.sizes.medium.icon_size,
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padding_x: theme.sizes.medium.padding_x,
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text_size: theme.sizes.medium.text_size,
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count: 0,
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}
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};
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let items = match self.items {
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Some(build) => build(window, cx),
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None => Vec::new(),
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};
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let selectable: Vec<usize> = items
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.iter()
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.enumerate()
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.filter(|(_, item)| !item.disabled)
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.map(|(index, _)| index)
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.collect();
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// Keyboard focus rides the container across frames.
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let focus_handle = window.with_element_namespace(self.id.clone(), |window| {
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window.use_keyed_state("tree-focus", cx, |_, cx| cx.focus_handle())
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});
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let focus = focus_handle.read(cx).clone();
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let label = self
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.a11y_label
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.clone()
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.unwrap_or_else(|| SharedString::from(self.id.to_string()));
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let chrome = TreeChrome {
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count: items.len(),
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..chrome
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};
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let rows: Vec<AnyElement> = items
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.iter()
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.enumerate()
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.map(|(index, item)| {
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render_row(
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item,
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index,
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self.selected == Some(index),
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&chrome,
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&self.on_change,
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&self.on_disclosure,
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&focus,
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)
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})
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.collect();
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div()
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.id(self.id)
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.flex()
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.flex_col()
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.gap_0p5()
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.text_size(chrome.text_size)
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.track_focus(&focus)
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.focusable()
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.tab_stop(true)
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.role(Role::Tree)
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.aria_label(label)
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.on_key_down({
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let selected = self.selected;
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let on_change = self.on_change.clone();
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let on_disclosure = self.on_disclosure.clone();
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move |event: &KeyDownEvent, window, cx| {
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match event.keystroke.key.as_str() {
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"down" => {
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if let Some(next) = adjacent(&selectable, selected, true)
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&& Some(next) != selected
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&& let Some(on_change) = &on_change
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{
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on_change(Some(next), window, cx);
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}
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}
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"up" => {
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if let Some(next) = adjacent(&selectable, selected, false)
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&& Some(next) != selected
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&& let Some(on_change) = &on_change
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{
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on_change(Some(next), window, cx);
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}
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}
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"home" => {
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if let Some(first) = selectable.first()
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&& selected != Some(*first)
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&& let Some(on_change) = &on_change
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{
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on_change(Some(*first), window, cx);
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}
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}
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"end" => {
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if let Some(last) = selectable.last()
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&& selected != Some(*last)
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&& let Some(on_change) = &on_change
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{
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on_change(Some(*last), window, cx);
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}
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}
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"left" | "right" => {
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let expanding = event.keystroke.key == "right";
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if let Some(index) = selected
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&& let Some(item) = items.get(index)
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&& item.expandable
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&& !item.disabled
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&& item.expanded != expanding
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&& let Some(on_disclosure) = &on_disclosure
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{
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on_disclosure(index, window, cx);
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}
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}
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_ => return,
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}
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cx.stop_propagation();
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}
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})
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.children(rows)
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}
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}
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fn render_row(
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item: &TreeItem,
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index: usize,
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selected: bool,
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chrome: &TreeChrome,
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on_change: &Option<ChangeHandler>,
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on_disclosure: &Option<DisclosureHandler>,
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focus: &FocusHandle,
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) -> AnyElement {
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let label_color = row_color(item, selected, chrome);
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let disabled = item.disabled;
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// One indent step per depth level, on the theme's horizontal padding.
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let indent = chrome.padding_x * (item.depth as f32 + 1.0);
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div()
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.id(("tree-item", index))
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.flex()
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.items_center()
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.gap_2()
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.pl(indent)
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.pr_2()
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.py_1()
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.rounded(chrome.radius_sm)
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.role(Role::TreeItem)
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.aria_selected(selected)
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.aria_level(item.depth + 1)
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.aria_size_of_set(chrome.count)
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.when(item.expandable, |row| row.aria_expanded(item.expanded))
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.map(|row| {
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if disabled {
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row
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} else if selected {
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row.bg(chrome.primary)
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} else {
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row.hover(|row| row.bg(chrome.muted))
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}
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})
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.when(!disabled, |row| {
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row.cursor_pointer().on_click({
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let on_change = on_change.clone();
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let focus = focus.clone();
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move |_, window, cx| {
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window.focus(&focus, cx);
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if let Some(on_change) = &on_change {
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on_change(Some(index), window, cx);
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}
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}
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})
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})
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.child(render_disclosure(
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item,
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index,
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disabled,
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selected,
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chrome,
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on_disclosure,
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))
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.when_some(item.icon, |row, role| {
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row.child(icon(role).size(chrome.icon_size).color(label_color))
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})
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.child(
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div()
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.flex_1()
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.text_color(label_color)
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.child(item.label.clone()),
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)
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.into_any_element()
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}
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/// The disclosure slot.
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fn render_disclosure(
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item: &TreeItem,
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index: usize,
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disabled: bool,
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selected: bool,
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chrome: &TreeChrome,
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on_disclosure: &Option<DisclosureHandler>,
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) -> AnyElement {
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let glyph_color = if disabled {
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chrome.muted_foreground
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} else if selected {
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chrome.primary_foreground
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} else {
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chrome.muted_foreground
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};
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let cell = div()
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.flex_none()
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.size(chrome.icon_size)
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.flex()
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.items_center()
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.justify_center()
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.child(
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icon(if item.expanded {
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IconRole::ChevronDown
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} else {
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IconRole::ChevronRight
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})
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.size(chrome.icon_size * 0.75)
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.color(glyph_color),
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);
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if item.expandable && !disabled {
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cell.id(("tree-disclosure", index))
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.cursor_pointer()
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.on_click({
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let on_disclosure = on_disclosure.clone();
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move |_, window, cx| {
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if let Some(on_disclosure) = &on_disclosure {
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on_disclosure(index, window, cx);
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}
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// The toggle is not a selection: keep it off the row.
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cx.stop_propagation();
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}
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})
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.into_any_element()
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} else {
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cell.into_any_element()
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}
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}
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/// The row's label/icon color.
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fn row_color(item: &TreeItem, selected: bool, chrome: &TreeChrome) -> Hsla {
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if item.disabled {
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chrome.muted_foreground
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} else if selected {
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chrome.primary_foreground
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} else {
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chrome.foreground
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}
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}
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/// The next selectable row in the direction.
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fn adjacent(selectable: &[usize], selected: Option<usize>, forward: bool) -> Option<usize> {
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if forward {
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selectable
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.iter()
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.copied()
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.find(|index| Some(*index) > selected)
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} else {
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selectable
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.iter()
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.copied()
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.rev()
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.find(|index| Some(*index) < selected)
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}
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}
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@@ -0,0 +1,191 @@
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use std::{cell::RefCell, rc::Rc};
|
||||
|
||||
use gpui::{
|
||||
Context, IntoElement, Modifiers, MouseButton, ParentElement as _, Render, Styled as _,
|
||||
TestAppContext, VisualTestContext, Window, WindowHandle, div, point, px,
|
||||
};
|
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use gpui_native_data::tree::{Tree, TreeItem};
|
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use gpui_native_theme::Theme;
|
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|
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type Changes = Rc<RefCell<Vec<Option<usize>>>>;
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type Disclosures = Rc<RefCell<Vec<usize>>>;
|
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|
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struct Harness {
|
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selected: Option<usize>,
|
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changes: Changes,
|
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disclosures: Disclosures,
|
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}
|
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|
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impl Render for Harness {
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fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
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let changes = self.changes.clone();
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let disclosures = self.disclosures.clone();
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let view = cx.entity();
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let change_view = view.clone();
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div().size_full().child(
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Tree::new("test-tree")
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.selected(self.selected)
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.on_change(move |next, _, cx| {
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changes.borrow_mut().push(next);
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change_view.update(cx, |harness, cx| {
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harness.selected = next;
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cx.notify();
|
||||
});
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})
|
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.on_disclosure(move |index, _, cx| {
|
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disclosures.borrow_mut().push(index);
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view.update(cx, |_, cx| cx.notify());
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})
|
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.items(|_, _| {
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vec![
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TreeItem::new("Root")
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.depth(0)
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.expandable(true)
|
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.expanded(true),
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TreeItem::new("Child").depth(1),
|
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TreeItem::new("Collapsed").depth(0).expandable(true),
|
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TreeItem::new("Untouchable").depth(1).disabled(true),
|
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TreeItem::new("Last").depth(0),
|
||||
]
|
||||
}),
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
/// Rows paint at the top-left, one per ~34 px band (same rhythm as the
|
||||
/// list), so clicks at `(50, 16/48/80/112/144)` land on Root / Child /
|
||||
/// Collapsed / the disabled Untouchable / Last. Each expandable row leads
|
||||
/// with a 16 px disclosure slot at its indent — a click at `(24, y)` hits
|
||||
/// row 0's chevron.
|
||||
fn tree_window() -> (
|
||||
TestAppContext,
|
||||
VisualTestContext,
|
||||
WindowHandle<Harness>,
|
||||
Changes,
|
||||
Disclosures,
|
||||
) {
|
||||
let mut cx = TestAppContext::single();
|
||||
cx.update(Theme::init);
|
||||
let changes = Rc::new(RefCell::new(Vec::new()));
|
||||
let disclosures = Rc::new(RefCell::new(Vec::new()));
|
||||
let harness_changes = changes.clone();
|
||||
let harness_disclosures = disclosures.clone();
|
||||
let window = cx.add_window(move |_, _| Harness {
|
||||
selected: None,
|
||||
changes: harness_changes,
|
||||
disclosures: harness_disclosures,
|
||||
});
|
||||
let mut visual = VisualTestContext::from_window(window.into(), &cx);
|
||||
visual.update(|window, cx| {
|
||||
window.draw(cx).clear(cx);
|
||||
});
|
||||
(cx, visual, window, changes, disclosures)
|
||||
}
|
||||
|
||||
fn draw(visual: &mut VisualTestContext) {
|
||||
visual.update(|window, cx| {
|
||||
window.draw(cx).clear(cx);
|
||||
});
|
||||
}
|
||||
|
||||
fn click(visual: &mut VisualTestContext, position: gpui::Point<gpui::Pixels>) {
|
||||
visual.simulate_mouse_down(position, MouseButton::Left, Modifiers::default());
|
||||
visual.simulate_mouse_up(position, MouseButton::Left, Modifiers::default());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn clicking_a_row_selects_it_and_hands_the_tree_the_keyboard() {
|
||||
let (_cx, mut visual, _window, changes, disclosures) = tree_window();
|
||||
|
||||
click(&mut visual, point(px(50.), px(16.)));
|
||||
assert_eq!(*changes.borrow(), vec![Some(0)]);
|
||||
assert!(disclosures.borrow().is_empty());
|
||||
|
||||
// The click focused the tree; arrows move within the visible rows.
|
||||
visual.simulate_keystrokes("down");
|
||||
draw(&mut visual);
|
||||
assert_eq!(*changes.borrow(), vec![Some(0), Some(1)]);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn clicking_the_disclosure_toggles_without_selecting() {
|
||||
let (_cx, mut visual, _window, changes, disclosures) = tree_window();
|
||||
|
||||
// Row 0's chevron, not its label.
|
||||
click(&mut visual, point(px(24.), px(16.)));
|
||||
draw(&mut visual);
|
||||
assert_eq!(*disclosures.borrow(), vec![0]);
|
||||
assert!(
|
||||
changes.borrow().is_empty(),
|
||||
"a disclosure is not a selection"
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn arrow_right_expands_and_left_collapses_the_selected_row() {
|
||||
let (_cx, mut visual, _window, changes, disclosures) = tree_window();
|
||||
|
||||
click(&mut visual, point(px(50.), px(16.))); // Root: expanded expandable
|
||||
visual.simulate_keystrokes("left"); // collapse → reports
|
||||
visual.simulate_keystrokes("right"); // still collapsed per the caller → nothing yet
|
||||
visual.simulate_keystrokes("down"); // Child: a leaf → arrows are inert
|
||||
visual.simulate_keystrokes("right");
|
||||
visual.simulate_keystrokes("left");
|
||||
draw(&mut visual);
|
||||
assert_eq!(*disclosures.borrow(), vec![0]);
|
||||
assert_eq!(
|
||||
*changes.borrow(),
|
||||
vec![Some(0), Some(1)],
|
||||
"disclosure keys never change the selection"
|
||||
);
|
||||
|
||||
// Select the collapsed expandable row and expand it.
|
||||
click(&mut visual, point(px(50.), px(80.)));
|
||||
visual.simulate_keystrokes("right");
|
||||
draw(&mut visual);
|
||||
assert_eq!(*disclosures.borrow(), vec![0, 2]);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn keyboard_navigation_skips_disabled_rows_and_never_wraps() {
|
||||
let (_cx, mut visual, _window, changes, _disclosures) = tree_window();
|
||||
|
||||
click(&mut visual, point(px(50.), px(16.)));
|
||||
visual.simulate_keystrokes("down"); // Two
|
||||
visual.simulate_keystrokes("down"); // Collapsed — selectable, not disabled
|
||||
visual.simulate_keystrokes("down"); // over the disabled row → Last
|
||||
visual.simulate_keystrokes("down"); // last selectable; no wrap
|
||||
draw(&mut visual);
|
||||
assert_eq!(*changes.borrow(), vec![Some(0), Some(1), Some(2), Some(4)]);
|
||||
|
||||
visual.simulate_keystrokes("home");
|
||||
visual.simulate_keystrokes("end");
|
||||
visual.simulate_keystrokes("up"); // over the disabled row
|
||||
draw(&mut visual);
|
||||
assert_eq!(
|
||||
*changes.borrow(),
|
||||
vec![
|
||||
Some(0),
|
||||
Some(1),
|
||||
Some(2),
|
||||
Some(4),
|
||||
Some(0),
|
||||
Some(4),
|
||||
Some(2)
|
||||
]
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn disclosure_keys_skip_disabled_and_unselected_rows() {
|
||||
let (_cx, mut visual, _window, changes, disclosures) = tree_window();
|
||||
|
||||
// Focus through the first row, then park the selection on the leaf.
|
||||
click(&mut visual, point(px(50.), px(16.)));
|
||||
visual.simulate_keystrokes("down"); // Child (leaf), focused tree
|
||||
visual.simulate_keystrokes("left"); // leaf: no disclosure
|
||||
visual.simulate_keystrokes("right"); // leaf: no disclosure
|
||||
draw(&mut visual);
|
||||
assert!(disclosures.borrow().is_empty());
|
||||
assert_eq!(*changes.borrow(), vec![Some(0), Some(1)]);
|
||||
}
|
||||
Reference in New Issue
Block a user