1use std::collections::hash_map::Entry;
 2use std::sync::Arc;
 3
 4use crate::Editor;
 5use collections::HashMap;
 6use gpui::{App, Entity};
 7use language::Buffer;
 8use language::Language;
 9use lsp::LanguageServerId;
10use multi_buffer::Anchor;
11
12pub(crate) fn find_specific_language_server_in_selection<F>(
13    editor: &Editor,
14    cx: &mut App,
15    filter_language: F,
16    language_server_name: &str,
17) -> Option<(Anchor, Arc<Language>, LanguageServerId, Entity<Buffer>)>
18where
19    F: Fn(&Language) -> bool,
20{
21    let Some(project) = &editor.project else {
22        return None;
23    };
24    let multibuffer = editor.buffer().read(cx);
25    let mut language_servers_for = HashMap::default();
26    editor
27        .selections
28        .disjoint_anchors()
29        .iter()
30        .filter(|selection| selection.start == selection.end)
31        .filter_map(|selection| Some((selection.start.buffer_id?, selection.start)))
32        .filter_map(|(buffer_id, trigger_anchor)| {
33            let buffer = multibuffer.buffer(buffer_id)?;
34            let server_id = *match language_servers_for.entry(buffer_id) {
35                Entry::Occupied(occupied_entry) => occupied_entry.into_mut(),
36                Entry::Vacant(vacant_entry) => {
37                    let language_server_id = project
38                        .read(cx)
39                        .language_servers_for_local_buffer(buffer.read(cx), cx)
40                        .find_map(|(adapter, server)| {
41                            if adapter.name.0.as_ref() == language_server_name {
42                                Some(server.server_id())
43                            } else {
44                                None
45                            }
46                        });
47                    vacant_entry.insert(language_server_id)
48                }
49            }
50            .as_ref()?;
51
52            Some((buffer, trigger_anchor, server_id))
53        })
54        .find_map(|(buffer, trigger_anchor, server_id)| {
55            let language = buffer.read(cx).language_at(trigger_anchor.text_anchor)?;
56            if !filter_language(&language) {
57                return None;
58            }
59            Some((
60                trigger_anchor,
61                Arc::clone(&language),
62                server_id,
63                buffer.clone(),
64            ))
65        })
66}