use crate::assistant_panel::ContextEditor;use anyhow::Result;pub use assistant_slash_command::{SlashCommand, SlashCommandOutput, SlashCommandRegistry};use editor::{CompletionProvider, Editor};use fuzzy::{match_strings, StringMatchCandidate};use gpui::{AppContext, Model, Task, ViewContext, WeakView, WindowContext};use language::{Anchor, Buffer, CodeLabel, Documentation, HighlightId, LanguageServerId, ToPoint};use parking_lot::{Mutex, RwLock};use rope::Point;use std::{    ops::Range,    sync::{        atomic::{AtomicBool, Ordering::SeqCst},        Arc,    },};use ui::ActiveTheme;use workspace::Workspace; pub mod active_command;pub mod auto_command;pub mod default_command;pub mod diagnostics_command;pub mod fetch_command;pub mod file_command;pub mod now_command;pub mod project_command;pub mod prompt_command;pub mod rustdoc_command;pub mod search_command;pub mod tabs_command;pub mod term_command; pub(crate) struct SlashCommandCompletionProvider {    commands: Arc<SlashCommandRegistry>,    cancel_flag: Mutex<Arc<AtomicBool>>,    editor: Option<WeakView<ContextEditor>>,    workspace: Option<WeakView<Workspace>>,} pub(crate) struct SlashCommandLine {    /// The range within the line containing the command name.    pub name: Range<usize>,    /// The range within the line containing the command argument.    pub argument: Option<Range<usize>>,} impl SlashCommandCompletionProvider {    pub fn new(        commands: Arc<SlashCommandRegistry>,        editor: Option<WeakView<ContextEditor>>,        workspace: Option<WeakView<Workspace>>,    ) -> Self {        Self {            cancel_flag: Mutex::new(Arc::new(AtomicBool::new(false))),            editor,            commands,            workspace,        }    }     fn complete_command_name(        &self,        command_name: &str,        command_range: Range<Anchor>,        name_range: Range<Anchor>,        cx: &mut WindowContext,    ) -> Task<Result<Vec<project::Completion>>> {        let candidates = self            .commands            .command_names()            .into_iter()            .enumerate()            .map(|(ix, def)| StringMatchCandidate {                id: ix,                string: def.to_string(),                char_bag: def.as_ref().into(),            })            .collect::<Vec<_>>();        let commands = self.commands.clone();        let command_name = command_name.to_string();        let editor = self.editor.clone();        let workspace = self.workspace.clone();        cx.spawn(|mut cx| async move {            let matches = match_strings(                &candidates,                &command_name,                true,                usize::MAX,                &Default::default(),                cx.background_executor().clone(),            )            .await;             cx.update(|cx| {                matches                    .into_iter()                    .filter_map(|mat| {                        let command = commands.command(&mat.string)?;                        let mut new_text = mat.string.clone();                        let requires_argument = command.requires_argument();                        if requires_argument {                            new_text.push(' ');                        }                         let confirm = editor.clone().zip(workspace.clone()).and_then(                            |(editor, workspace)| {                                (!requires_argument).then(|| {                                    let command_name = mat.string.clone();                                    let command_range = command_range.clone();                                    let editor = editor.clone();                                    let workspace = workspace.clone();                                    Arc::new(move |cx: &mut WindowContext| {                                        editor                                            .update(cx, |editor, cx| {                                                editor.run_command(                                                    command_range.clone(),                                                    &command_name,                                                    None,                                                    true,                                                    workspace.clone(),                                                    cx,                                                );                                            })                                            .ok();                                    }) as Arc<_>                                })                            },                        );                        Some(project::Completion {                            old_range: name_range.clone(),                            documentation: Some(Documentation::SingleLine(command.description())),                            new_text,                            label: command.label(cx),                            server_id: LanguageServerId(0),                            lsp_completion: Default::default(),                            show_new_completions_on_confirm: requires_argument,                            confirm,                        })                    })                    .collect()            })        })    }     fn complete_command_argument(        &self,        command_name: &str,        argument: String,        command_range: Range<Anchor>,        argument_range: Range<Anchor>,        cx: &mut WindowContext,    ) -> Task<Result<Vec<project::Completion>>> {        let new_cancel_flag = Arc::new(AtomicBool::new(false));        let mut flag = self.cancel_flag.lock();        flag.store(true, SeqCst);        *flag = new_cancel_flag.clone();         if let Some(command) = self.commands.command(command_name) {            let completions = command.complete_argument(                argument,                new_cancel_flag.clone(),                self.workspace.clone(),                cx,            );            let command_name: Arc<str> = command_name.into();            let editor = self.editor.clone();            let workspace = self.workspace.clone();            cx.background_executor().spawn(async move {                Ok(completions                    .await?                    .into_iter()                    .map(|command_argument| {                        let confirm =                            editor                                .clone()                                .zip(workspace.clone())                                .map(|(editor, workspace)| {                                    Arc::new({                                        let command_range = command_range.clone();                                        let command_name = command_name.clone();                                        let command_argument = command_argument.clone();                                        move |cx: &mut WindowContext| {                                            editor                                                .update(cx, |editor, cx| {                                                    editor.run_command(                                                        command_range.clone(),                                                        &command_name,                                                        Some(&command_argument),                                                        true,                                                        workspace.clone(),                                                        cx,                                                    );                                                })                                                .ok();                                        }                                    }) as Arc<_>                                });                        project::Completion {                            old_range: argument_range.clone(),                            label: CodeLabel::plain(command_argument.clone(), None),                            new_text: command_argument.clone(),                            documentation: None,                            server_id: LanguageServerId(0),                            lsp_completion: Default::default(),                            show_new_completions_on_confirm: false,                            confirm,                        }                    })                    .collect())            })        } else {            cx.background_executor()                .spawn(async move { Ok(Vec::new()) })        }    }} impl CompletionProvider for SlashCommandCompletionProvider {    fn completions(        &self,        buffer: &Model<Buffer>,        buffer_position: Anchor,        _: editor::CompletionContext,        cx: &mut ViewContext<Editor>,    ) -> Task<Result<Vec<project::Completion>>> {        let Some((name, argument, command_range, argument_range)) =            buffer.update(cx, |buffer, _cx| {                let position = buffer_position.to_point(buffer);                let line_start = Point::new(position.row, 0);                let mut lines = buffer.text_for_range(line_start..position).lines();                let line = lines.next()?;                let call = SlashCommandLine::parse(line)?;                 let command_range_start = Point::new(position.row, call.name.start as u32 - 1);                let command_range_end = Point::new(                    position.row,                    call.argument.as_ref().map_or(call.name.end, |arg| arg.end) as u32,                );                let command_range = buffer.anchor_after(command_range_start)                    ..buffer.anchor_after(command_range_end);                 let name = line[call.name.clone()].to_string();                 Some(if let Some(argument) = call.argument {                    let start =                        buffer.anchor_after(Point::new(position.row, argument.start as u32));                    let argument = line[argument.clone()].to_string();                    (name, Some(argument), command_range, start..buffer_position)                } else {                    let start =                        buffer.anchor_after(Point::new(position.row, call.name.start as u32));                    (name, None, command_range, start..buffer_position)                })            })        else {            return Task::ready(Ok(Vec::new()));        };         if let Some(argument) = argument {            self.complete_command_argument(&name, argument, command_range, argument_range, cx)        } else {            self.complete_command_name(&name, command_range, argument_range, cx)        }    }     fn resolve_completions(        &self,        _: Model<Buffer>,        _: Vec<usize>,        _: Arc<RwLock<Box<[project::Completion]>>>,        _: &mut ViewContext<Editor>,    ) -> Task<Result<bool>> {        Task::ready(Ok(true))    }     fn apply_additional_edits_for_completion(        &self,        _: Model<Buffer>,        _: project::Completion,        _: bool,        _: &mut ViewContext<Editor>,    ) -> Task<Result<Option<language::Transaction>>> {        Task::ready(Ok(None))    }     fn is_completion_trigger(        &self,        buffer: &Model<Buffer>,        position: language::Anchor,        _text: &str,        _trigger_in_words: bool,        cx: &mut ViewContext<Editor>,    ) -> bool {        let buffer = buffer.read(cx);        let position = position.to_point(buffer);        let line_start = Point::new(position.row, 0);        let mut lines = buffer.text_for_range(line_start..position).lines();        if let Some(line) = lines.next() {            SlashCommandLine::parse(line).is_some()        } else {            false        }    }} impl SlashCommandLine {    pub(crate) fn parse(line: &str) -> Option<Self> {        let mut call: Option<Self> = None;        let mut ix = 0;        for c in line.chars() {            let next_ix = ix + c.len_utf8();            if let Some(call) = &mut call {                // The command arguments start at the first non-whitespace character                // after the command name, and continue until the end of the line.                if let Some(argument) = &mut call.argument {                    if (*argument).is_empty() && c.is_whitespace() {                        argument.start = next_ix;                    }                    argument.end = next_ix;                }                // The command name ends at the first whitespace character.                else if !call.name.is_empty() {                    if c.is_whitespace() {                        call.argument = Some(next_ix..next_ix);                    } else {                        call.name.end = next_ix;                    }                }                // The command name must begin with a letter.                else if c.is_alphabetic() {                    call.name.end = next_ix;                } else {                    return None;                }            }            // Commands start with a slash.            else if c == '/' {                call = Some(SlashCommandLine {                    name: next_ix..next_ix,                    argument: None,                });            }            // The line can't contain anything before the slash except for whitespace.            else if !c.is_whitespace() {                return None;            }            ix = next_ix;        }        call    }} pub fn create_label_for_command(    command_name: &str,    arguments: &[&str],    cx: &AppContext,) -> CodeLabel {    let mut label = CodeLabel::default();    label.push_str(command_name, None);    label.push_str(" ", None);    label.push_str(        &arguments.join(" "),        cx.theme().syntax().highlight_id("comment").map(HighlightId),    );    label.filter_range = 0..command_name.len();    label}