use std::sync::Arc; use fuzzy::StringMatchCandidate;use gpui::{AppContext, DismissEvent, FocusHandle, FocusableView, Task, View, WeakModel, WeakView};use picker::{Picker, PickerDelegate};use ui::{prelude::*, ListItem}; use crate::context_picker::{ConfirmBehavior, ContextPicker};use crate::context_store::{self, ContextStore};use crate::thread::ThreadId;use crate::thread_store::ThreadStore; pub struct ThreadContextPicker {    picker: View<Picker<ThreadContextPickerDelegate>>,} impl ThreadContextPicker {    pub fn new(        thread_store: WeakModel<ThreadStore>,        context_picker: WeakView<ContextPicker>,        context_store: WeakModel<context_store::ContextStore>,        confirm_behavior: ConfirmBehavior,        cx: &mut ViewContext<Self>,    ) -> Self {        let delegate = ThreadContextPickerDelegate::new(            thread_store,            context_picker,            context_store,            confirm_behavior,        );        let picker = cx.new_view(|cx| Picker::uniform_list(delegate, cx));         ThreadContextPicker { picker }    }} impl FocusableView for ThreadContextPicker {    fn focus_handle(&self, cx: &AppContext) -> FocusHandle {        self.picker.focus_handle(cx)    }} impl Render for ThreadContextPicker {    fn render(&mut self, _cx: &mut ViewContext<Self>) -> impl IntoElement {        self.picker.clone()    }} #[derive(Debug, Clone)]pub struct ThreadContextEntry {    pub id: ThreadId,    pub summary: SharedString,} pub struct ThreadContextPickerDelegate {    thread_store: WeakModel<ThreadStore>,    context_picker: WeakView<ContextPicker>,    context_store: WeakModel<context_store::ContextStore>,    confirm_behavior: ConfirmBehavior,    matches: Vec<ThreadContextEntry>,    selected_index: usize,} impl ThreadContextPickerDelegate {    pub fn new(        thread_store: WeakModel<ThreadStore>,        context_picker: WeakView<ContextPicker>,        context_store: WeakModel<context_store::ContextStore>,        confirm_behavior: ConfirmBehavior,    ) -> Self {        ThreadContextPickerDelegate {            thread_store,            context_picker,            context_store,            confirm_behavior,            matches: Vec::new(),            selected_index: 0,        }    }} impl PickerDelegate for ThreadContextPickerDelegate {    type ListItem = ListItem;     fn match_count(&self) -> usize {        self.matches.len()    }     fn selected_index(&self) -> usize {        self.selected_index    }     fn set_selected_index(&mut self, ix: usize, _cx: &mut ViewContext<Picker<Self>>) {        self.selected_index = ix;    }     fn placeholder_text(&self, _cx: &mut WindowContext) -> Arc<str> {        "Search threads…".into()    }     fn update_matches(&mut self, query: String, cx: &mut ViewContext<Picker<Self>>) -> Task<()> {        let Ok(threads) = self.thread_store.update(cx, |this, cx| {            this.threads(cx)                .into_iter()                .map(|thread| {                    let id = thread.read(cx).id().clone();                    let summary = thread.read(cx).summary_or_default();                    ThreadContextEntry { id, summary }                })                .collect::<Vec<_>>()        }) else {            return Task::ready(());        };         let executor = cx.background_executor().clone();        let search_task = cx.background_executor().spawn(async move {            if query.is_empty() {                threads            } else {                let candidates = threads                    .iter()                    .enumerate()                    .map(|(id, thread)| StringMatchCandidate::new(id, &thread.summary))                    .collect::<Vec<_>>();                let matches = fuzzy::match_strings(                    &candidates,                    &query,                    false,                    100,                    &Default::default(),                    executor,                )                .await;                 matches                    .into_iter()                    .map(|mat| threads[mat.candidate_id].clone())                    .collect()            }        });         cx.spawn(|this, mut cx| async move {            let matches = search_task.await;            this.update(&mut cx, |this, cx| {                this.delegate.matches = matches;                this.delegate.selected_index = 0;                cx.notify();            })            .ok();        })    }     fn confirm(&mut self, _secondary: bool, cx: &mut ViewContext<Picker<Self>>) {        let Some(entry) = self.matches.get(self.selected_index) else {            return;        };         let Some(thread_store) = self.thread_store.upgrade() else {            return;        };         let Some(thread) = thread_store.update(cx, |this, cx| this.open_thread(&entry.id, cx))        else {            return;        };         self.context_store            .update(cx, |context_store, cx| context_store.add_thread(thread, cx))            .ok();         match self.confirm_behavior {            ConfirmBehavior::KeepOpen => {}            ConfirmBehavior::Close => self.dismissed(cx),        }    }     fn dismissed(&mut self, cx: &mut ViewContext<Picker<Self>>) {        self.context_picker            .update(cx, |_, cx| {                cx.emit(DismissEvent);            })            .ok();    }     fn render_match(        &self,        ix: usize,        selected: bool,        cx: &mut ViewContext<Picker<Self>>,    ) -> Option<Self::ListItem> {        let thread = &self.matches[ix];         Some(ListItem::new(ix).inset(true).toggle_state(selected).child(            render_thread_context_entry(thread, self.context_store.clone(), cx),        ))    }} pub fn render_thread_context_entry(    thread: &ThreadContextEntry,    context_store: WeakModel<ContextStore>,    cx: &mut WindowContext,) -> Div {    let added = context_store.upgrade().map_or(false, |ctx_store| {        ctx_store.read(cx).includes_thread(&thread.id).is_some()    });     h_flex()        .gap_1()        .w_full()        .child(Icon::new(IconName::MessageCircle).size(IconSize::Small))        .child(Label::new(thread.summary.clone()))        .child(div().w_full())        .when(added, |el| {            el.child(                h_flex()                    .gap_1()                    .child(                        Icon::new(IconName::Check)                            .size(IconSize::Small)                            .color(Color::Success),                    )                    .child(Label::new("Added").size(LabelSize::Small)),            )        })}