1use super::{SlashCommand, SlashCommandOutput};
 2use anyhow::{anyhow, Context as _, Result};
 3use assistant_slash_command::{ArgumentCompletion, SlashCommandOutputSection};
 4use editor::Editor;
 5use gpui::{Task, WeakView};
 6use language::LspAdapterDelegate;
 7use std::sync::Arc;
 8use std::{path::Path, sync::atomic::AtomicBool};
 9use ui::{IconName, WindowContext};
10use workspace::Workspace;
11
12pub(crate) struct OutlineSlashCommand;
13
14impl SlashCommand for OutlineSlashCommand {
15    fn name(&self) -> String {
16        "symbols".into()
17    }
18
19    fn description(&self) -> String {
20        "insert symbols for active tab".into()
21    }
22
23    fn menu_text(&self) -> String {
24        "Insert Symbols for Active Tab".into()
25    }
26
27    fn complete_argument(
28        self: Arc<Self>,
29        _arguments: &[String],
30        _cancel: Arc<AtomicBool>,
31        _workspace: Option<WeakView<Workspace>>,
32        _cx: &mut WindowContext,
33    ) -> Task<Result<Vec<ArgumentCompletion>>> {
34        Task::ready(Err(anyhow!("this command does not require argument")))
35    }
36
37    fn requires_argument(&self) -> bool {
38        false
39    }
40
41    fn run(
42        self: Arc<Self>,
43        _arguments: &[String],
44        workspace: WeakView<Workspace>,
45        _delegate: Option<Arc<dyn LspAdapterDelegate>>,
46        cx: &mut WindowContext,
47    ) -> Task<Result<SlashCommandOutput>> {
48        let output = workspace.update(cx, |workspace, cx| {
49            let Some(active_item) = workspace.active_item(cx) else {
50                return Task::ready(Err(anyhow!("no active tab")));
51            };
52            let Some(buffer) = active_item
53                .downcast::<Editor>()
54                .and_then(|editor| editor.read(cx).buffer().read(cx).as_singleton())
55            else {
56                return Task::ready(Err(anyhow!("active tab is not an editor")));
57            };
58
59            let snapshot = buffer.read(cx).snapshot();
60            let path = snapshot.resolve_file_path(cx, true);
61
62            cx.background_executor().spawn(async move {
63                let outline = snapshot
64                    .outline(None)
65                    .context("no symbols for active tab")?;
66
67                let path = path.as_deref().unwrap_or(Path::new("untitled"));
68                let mut outline_text = format!("Symbols for {}:\n", path.display());
69                for item in &outline.path_candidates {
70                    outline_text.push_str("- ");
71                    outline_text.push_str(&item.string);
72                    outline_text.push('\n');
73                }
74
75                Ok(SlashCommandOutput {
76                    sections: vec![SlashCommandOutputSection {
77                        range: 0..outline_text.len(),
78                        icon: IconName::ListTree,
79                        label: path.to_string_lossy().to_string().into(),
80                    }],
81                    text: outline_text,
82                    run_commands_in_text: false,
83                })
84            })
85        });
86
87        output.unwrap_or_else(|error| Task::ready(Err(error)))
88    }
89}