use crate::components::KernelListItem;use crate::kernels::RemoteRunningKernel;use crate::setup_editor_session_actions;use crate::{    kernels::{Kernel, KernelSpecification, NativeRunningKernel},    outputs::{ExecutionStatus, ExecutionView},    KernelStatus,};use collections::{HashMap, HashSet};use editor::{    display_map::{        BlockContext, BlockId, BlockPlacement, BlockProperties, BlockStyle, CustomBlockId,        RenderBlock,    },    scroll::Autoscroll,    Anchor, AnchorRangeExt as _, Editor, MultiBuffer, ToPoint,};use futures::FutureExt as _;use gpui::{    div, prelude::*, Context, Entity, EventEmitter, Render, Subscription, Task, WeakEntity, Window,};use language::Point;use project::Fs;use runtimelib::{    ExecuteRequest, ExecutionState, InterruptRequest, JupyterMessage, JupyterMessageContent,    ShutdownRequest,};use std::{env::temp_dir, ops::Range, sync::Arc, time::Duration};use theme::ActiveTheme;use ui::{prelude::*, IconButtonShape, Tooltip};use util::ResultExt as _; pub struct Session {    fs: Arc<dyn Fs>,    editor: WeakEntity<Editor>,    pub kernel: Kernel,    blocks: HashMap<String, EditorBlock>,    pub kernel_specification: KernelSpecification,    _buffer_subscription: Subscription,} struct EditorBlock {    code_range: Range<Anchor>,    invalidation_anchor: Anchor,    block_id: CustomBlockId,    execution_view: Entity<ExecutionView>,} type CloseBlockFn =    Arc<dyn for<'a> Fn(CustomBlockId, &'a mut Window, &mut App) + Send + Sync + 'static>; impl EditorBlock {    fn new(        editor: WeakEntity<Editor>,        code_range: Range<Anchor>,        status: ExecutionStatus,        on_close: CloseBlockFn,        cx: &mut Context<Session>,    ) -> anyhow::Result<Self> {        let editor = editor            .upgrade()            .ok_or_else(|| anyhow::anyhow!("editor is not open"))?;        let workspace = editor            .read(cx)            .workspace()            .ok_or_else(|| anyhow::anyhow!("workspace dropped"))?;         let execution_view = cx.new(|cx| ExecutionView::new(status, workspace.downgrade(), cx));         let (block_id, invalidation_anchor) = editor.update(cx, |editor, cx| {            let buffer = editor.buffer().clone();            let buffer_snapshot = buffer.read(cx).snapshot(cx);            let end_point = code_range.end.to_point(&buffer_snapshot);            let next_row_start = end_point + Point::new(1, 0);            if next_row_start > buffer_snapshot.max_point() {                buffer.update(cx, |buffer, cx| {                    buffer.edit(                        [(                            buffer_snapshot.max_point()..buffer_snapshot.max_point(),                            "\n",                        )],                        None,                        cx,                    )                });            }             let invalidation_anchor = buffer.read(cx).read(cx).anchor_before(next_row_start);            let block = BlockProperties {                placement: BlockPlacement::Below(code_range.end),                // Take up at least one height for status, allow the editor to determine the real height based on the content from render                height: 1,                style: BlockStyle::Sticky,                render: Self::create_output_area_renderer(execution_view.clone(), on_close.clone()),                priority: 0,            };             let block_id = editor.insert_blocks([block], None, cx)[0];            (block_id, invalidation_anchor)        });         anyhow::Ok(Self {            code_range,            invalidation_anchor,            block_id,            execution_view,        })    }     fn handle_message(        &mut self,        message: &JupyterMessage,        window: &mut Window,        cx: &mut Context<Session>,    ) {        self.execution_view.update(cx, |execution_view, cx| {            execution_view.push_message(&message.content, window, cx);        });    }     fn create_output_area_renderer(        execution_view: Entity<ExecutionView>,        on_close: CloseBlockFn,    ) -> RenderBlock {        Arc::new(move |cx: &mut BlockContext| {            let execution_view = execution_view.clone();            let text_style = crate::outputs::plain::text_style(cx.window, cx.app);             let gutter = cx.gutter_dimensions;             let block_id = cx.block_id;            let on_close = on_close.clone();             let rem_size = cx.window.rem_size();             let text_line_height = text_style.line_height_in_pixels(rem_size);             let close_button = h_flex()                .flex_none()                .items_center()                .justify_center()                .absolute()                .top(text_line_height / 2.)                .right(                    // 2px is a magic number to nudge the button just a bit closer to                    // the line number start                    gutter.full_width() / 2.0 - text_line_height / 2.0 - px(2.),                )                .w(text_line_height)                .h(text_line_height)                .child(                    IconButton::new("close_output_area", IconName::Close)                        .icon_size(IconSize::Small)                        .icon_color(Color::Muted)                        .size(ButtonSize::Compact)                        .shape(IconButtonShape::Square)                        .tooltip(Tooltip::text("Close output area"))                        .on_click(move |_, window, cx| {                            if let BlockId::Custom(block_id) = block_id {                                (on_close)(block_id, window, cx)                            }                        }),                );             div()                .id(cx.block_id)                .block_mouse_down()                .flex()                .items_start()                .min_h(text_line_height)                .w_full()                .border_y_1()                .border_color(cx.theme().colors().border)                .bg(cx.theme().colors().background)                .child(                    div()                        .relative()                        .w(gutter.full_width())                        .h(text_line_height * 2)                        .child(close_button),                )                .child(                    div()                        .flex_1()                        .size_full()                        .py(text_line_height / 2.)                        .mr(gutter.width)                        .child(execution_view),                )                .into_any_element()        })    }} impl Session {    pub fn new(        editor: WeakEntity<Editor>,        fs: Arc<dyn Fs>,        kernel_specification: KernelSpecification,        window: &mut Window,        cx: &mut Context<Self>,    ) -> Self {        let subscription = match editor.upgrade() {            Some(editor) => {                let buffer = editor.read(cx).buffer().clone();                cx.subscribe(&buffer, Self::on_buffer_event)            }            None => Subscription::new(|| {}),        };         let editor_handle = editor.clone();         editor            .update(cx, |editor, _cx| {                setup_editor_session_actions(editor, editor_handle);            })            .ok();         let mut session = Self {            fs,            editor,            kernel: Kernel::StartingKernel(Task::ready(()).shared()),            blocks: HashMap::default(),            kernel_specification,            _buffer_subscription: subscription,        };         session.start_kernel(window, cx);        session    }     fn start_kernel(&mut self, window: &mut Window, cx: &mut Context<Self>) {        let kernel_language = self.kernel_specification.language();        let entity_id = self.editor.entity_id();        let working_directory = self            .editor            .upgrade()            .and_then(|editor| editor.read(cx).working_directory(cx))            .unwrap_or_else(temp_dir);         telemetry::event!(            "Kernel Status Changed",            kernel_language,            kernel_status = KernelStatus::Starting.to_string(),            repl_session_id = cx.entity_id().to_string(),        );         let session_view = cx.entity().clone();         let kernel = match self.kernel_specification.clone() {            KernelSpecification::Jupyter(kernel_specification)            | KernelSpecification::PythonEnv(kernel_specification) => NativeRunningKernel::new(                kernel_specification,                entity_id,                working_directory,                self.fs.clone(),                session_view,                window,                cx,            ),            KernelSpecification::Remote(remote_kernel_specification) => RemoteRunningKernel::new(                remote_kernel_specification,                working_directory,                session_view,                window,                cx,            ),        };         let pending_kernel = cx            .spawn(async move |this, cx| {                let kernel = kernel.await;                 match kernel {                    Ok(kernel) => {                        this.update(cx, |session, cx| {                            session.kernel(Kernel::RunningKernel(kernel), cx);                        })                        .ok();                    }                    Err(err) => {                        this.update(cx, |session, cx| {                            session.kernel_errored(err.to_string(), cx);                        })                        .ok();                    }                }            })            .shared();         self.kernel(Kernel::StartingKernel(pending_kernel), cx);        cx.notify();    }     pub fn kernel_errored(&mut self, error_message: String, cx: &mut Context<Self>) {        self.kernel(Kernel::ErroredLaunch(error_message.clone()), cx);         self.blocks.values().for_each(|block| {            block.execution_view.update(cx, |execution_view, cx| {                match execution_view.status {                    ExecutionStatus::Finished => {                        // Do nothing when the output was good                    }                    _ => {                        // All other cases, set the status to errored                        execution_view.status =                            ExecutionStatus::KernelErrored(error_message.clone())                    }                }                cx.notify();            });        });    }     fn on_buffer_event(        &mut self,        buffer: Entity<MultiBuffer>,        event: &multi_buffer::Event,        cx: &mut Context<Self>,    ) {        if let multi_buffer::Event::Edited { .. } = event {            let snapshot = buffer.read(cx).snapshot(cx);             let mut blocks_to_remove: HashSet<CustomBlockId> = HashSet::default();             self.blocks.retain(|_id, block| {                if block.invalidation_anchor.is_valid(&snapshot) {                    true                } else {                    blocks_to_remove.insert(block.block_id);                    false                }            });             if !blocks_to_remove.is_empty() {                self.editor                    .update(cx, |editor, cx| {                        editor.remove_blocks(blocks_to_remove, None, cx);                    })                    .ok();                cx.notify();            }        }    }     fn send(&mut self, message: JupyterMessage, _cx: &mut Context<Self>) -> anyhow::Result<()> {        if let Kernel::RunningKernel(kernel) = &mut self.kernel {            kernel.request_tx().try_send(message).ok();        }         anyhow::Ok(())    }     pub fn clear_outputs(&mut self, cx: &mut Context<Self>) {        let blocks_to_remove: HashSet<CustomBlockId> =            self.blocks.values().map(|block| block.block_id).collect();         self.editor            .update(cx, |editor, cx| {                editor.remove_blocks(blocks_to_remove, None, cx);            })            .ok();         self.blocks.clear();    }     pub fn execute(        &mut self,        code: String,        anchor_range: Range<Anchor>,        next_cell: Option<Anchor>,        move_down: bool,        window: &mut Window,        cx: &mut Context<Self>,    ) {        let Some(editor) = self.editor.upgrade() else {            return;        };         if code.is_empty() {            return;        }         let execute_request = ExecuteRequest {            code,            ..ExecuteRequest::default()        };         let message: JupyterMessage = execute_request.into();         let mut blocks_to_remove: HashSet<CustomBlockId> = HashSet::default();         let buffer = editor.read(cx).buffer().read(cx).snapshot(cx);         self.blocks.retain(|_key, block| {            if anchor_range.overlaps(&block.code_range, &buffer) {                blocks_to_remove.insert(block.block_id);                false            } else {                true            }        });         self.editor            .update(cx, |editor, cx| {                editor.remove_blocks(blocks_to_remove, None, cx);            })            .ok();         let status = match &self.kernel {            Kernel::Restarting => ExecutionStatus::Restarting,            Kernel::RunningKernel(_) => ExecutionStatus::Queued,            Kernel::StartingKernel(_) => ExecutionStatus::ConnectingToKernel,            Kernel::ErroredLaunch(error) => ExecutionStatus::KernelErrored(error.clone()),            Kernel::ShuttingDown => ExecutionStatus::ShuttingDown,            Kernel::Shutdown => ExecutionStatus::Shutdown,        };         let parent_message_id = message.header.msg_id.clone();        let session_view = cx.entity().downgrade();        let weak_editor = self.editor.clone();         let on_close: CloseBlockFn = Arc::new(            move |block_id: CustomBlockId, _: &mut Window, cx: &mut App| {                if let Some(session) = session_view.upgrade() {                    session.update(cx, |session, cx| {                        session.blocks.remove(&parent_message_id);                        cx.notify();                    });                }                 if let Some(editor) = weak_editor.upgrade() {                    editor.update(cx, |editor, cx| {                        let mut block_ids = HashSet::default();                        block_ids.insert(block_id);                        editor.remove_blocks(block_ids, None, cx);                    });                }            },        );         let Ok(editor_block) =            EditorBlock::new(self.editor.clone(), anchor_range, status, on_close, cx)        else {            return;        };         let new_cursor_pos = if let Some(next_cursor) = next_cell {            next_cursor        } else {            editor_block.invalidation_anchor        };         self.blocks            .insert(message.header.msg_id.clone(), editor_block);         match &self.kernel {            Kernel::RunningKernel(_) => {                self.send(message, cx).ok();            }            Kernel::StartingKernel(task) => {                // Queue up the execution as a task to run after the kernel starts                let task = task.clone();                let message = message.clone();                 cx.spawn(async move |this, cx| {                    task.await;                    this.update(cx, |session, cx| {                        session.send(message, cx).ok();                    })                    .ok();                })                .detach();            }            _ => {}        }         if move_down {            editor.update(cx, move |editor, cx| {                editor.change_selections(                    Some(Autoscroll::top_relative(8)),                    window,                    cx,                    |selections| {                        selections.select_ranges([new_cursor_pos..new_cursor_pos]);                    },                );            });        }    }     pub fn route(&mut self, message: &JupyterMessage, window: &mut Window, cx: &mut Context<Self>) {        let parent_message_id = match message.parent_header.as_ref() {            Some(header) => &header.msg_id,            None => return,        };         match &message.content {            JupyterMessageContent::Status(status) => {                self.kernel.set_execution_state(&status.execution_state);

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