mirror of
https://github.com/zed-industries/zed.git
synced 2025-01-30 22:34:13 +00:00
688 lines
24 KiB
Rust
688 lines
24 KiB
Rust
use crate::streaming_diff::{Hunk, StreamingDiff};
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use ai::completion::{CompletionProvider, CompletionRequest};
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use anyhow::Result;
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use editor::{Anchor, MultiBuffer, MultiBufferSnapshot, ToOffset, ToPoint};
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use futures::{channel::mpsc, SinkExt, Stream, StreamExt};
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use gpui::{EventEmitter, Model, ModelContext, Task};
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use language::{Rope, TransactionId};
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use multi_buffer;
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use std::{cmp, future, ops::Range, sync::Arc};
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pub enum Event {
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Finished,
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Undone,
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}
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#[derive(Clone)]
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pub enum CodegenKind {
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Transform { range: Range<Anchor> },
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Generate { position: Anchor },
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}
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pub struct Codegen {
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provider: Arc<dyn CompletionProvider>,
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buffer: Model<MultiBuffer>,
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snapshot: MultiBufferSnapshot,
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kind: CodegenKind,
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last_equal_ranges: Vec<Range<Anchor>>,
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transaction_id: Option<TransactionId>,
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error: Option<anyhow::Error>,
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generation: Task<()>,
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idle: bool,
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_subscription: gpui::Subscription,
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}
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impl EventEmitter<Event> for Codegen {}
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impl Codegen {
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pub fn new(
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buffer: Model<MultiBuffer>,
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kind: CodegenKind,
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provider: Arc<dyn CompletionProvider>,
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cx: &mut ModelContext<Self>,
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) -> Self {
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let snapshot = buffer.read(cx).snapshot(cx);
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Self {
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provider,
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buffer: buffer.clone(),
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snapshot,
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kind,
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last_equal_ranges: Default::default(),
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transaction_id: Default::default(),
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error: Default::default(),
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idle: true,
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generation: Task::ready(()),
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_subscription: cx.subscribe(&buffer, Self::handle_buffer_event),
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}
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}
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fn handle_buffer_event(
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&mut self,
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_buffer: Model<MultiBuffer>,
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event: &multi_buffer::Event,
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cx: &mut ModelContext<Self>,
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) {
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if let multi_buffer::Event::TransactionUndone { transaction_id } = event {
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if self.transaction_id == Some(*transaction_id) {
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self.transaction_id = None;
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self.generation = Task::ready(());
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cx.emit(Event::Undone);
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}
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}
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}
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pub fn range(&self) -> Range<Anchor> {
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match &self.kind {
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CodegenKind::Transform { range } => range.clone(),
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CodegenKind::Generate { position } => position.bias_left(&self.snapshot)..*position,
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}
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}
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pub fn kind(&self) -> &CodegenKind {
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&self.kind
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}
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pub fn last_equal_ranges(&self) -> &[Range<Anchor>] {
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&self.last_equal_ranges
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}
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pub fn idle(&self) -> bool {
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self.idle
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}
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pub fn error(&self) -> Option<&anyhow::Error> {
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self.error.as_ref()
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}
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pub fn start(&mut self, prompt: Box<dyn CompletionRequest>, cx: &mut ModelContext<Self>) {
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let range = self.range();
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let snapshot = self.snapshot.clone();
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let selected_text = snapshot
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.text_for_range(range.start..range.end)
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.collect::<Rope>();
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let selection_start = range.start.to_point(&snapshot);
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let suggested_line_indent = snapshot
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.suggested_indents(selection_start.row..selection_start.row + 1, cx)
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.into_values()
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.next()
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.unwrap_or_else(|| snapshot.indent_size_for_line(selection_start.row));
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let response = self.provider.complete(prompt);
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self.generation = cx.spawn(|this, mut cx| {
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async move {
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let generate = async {
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let mut edit_start = range.start.to_offset(&snapshot);
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let (mut hunks_tx, mut hunks_rx) = mpsc::channel(1);
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let diff = cx.background_executor().spawn(async move {
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let chunks = strip_invalid_spans_from_codeblock(response.await?);
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futures::pin_mut!(chunks);
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let mut diff = StreamingDiff::new(selected_text.to_string());
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let mut new_text = String::new();
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let mut base_indent = None;
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let mut line_indent = None;
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let mut first_line = true;
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while let Some(chunk) = chunks.next().await {
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let chunk = chunk?;
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let mut lines = chunk.split('\n').peekable();
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while let Some(line) = lines.next() {
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new_text.push_str(line);
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if line_indent.is_none() {
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if let Some(non_whitespace_ch_ix) =
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new_text.find(|ch: char| !ch.is_whitespace())
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{
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line_indent = Some(non_whitespace_ch_ix);
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base_indent = base_indent.or(line_indent);
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let line_indent = line_indent.unwrap();
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let base_indent = base_indent.unwrap();
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let indent_delta = line_indent as i32 - base_indent as i32;
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let mut corrected_indent_len = cmp::max(
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0,
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suggested_line_indent.len as i32 + indent_delta,
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)
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as usize;
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if first_line {
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corrected_indent_len = corrected_indent_len
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.saturating_sub(selection_start.column as usize);
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}
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let indent_char = suggested_line_indent.char();
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let mut indent_buffer = [0; 4];
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let indent_str =
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indent_char.encode_utf8(&mut indent_buffer);
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new_text.replace_range(
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..line_indent,
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&indent_str.repeat(corrected_indent_len),
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);
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}
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}
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if line_indent.is_some() {
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hunks_tx.send(diff.push_new(&new_text)).await?;
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new_text.clear();
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}
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if lines.peek().is_some() {
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hunks_tx.send(diff.push_new("\n")).await?;
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line_indent = None;
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first_line = false;
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}
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}
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}
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hunks_tx.send(diff.push_new(&new_text)).await?;
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hunks_tx.send(diff.finish()).await?;
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anyhow::Ok(())
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});
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while let Some(hunks) = hunks_rx.next().await {
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this.update(&mut cx, |this, cx| {
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this.last_equal_ranges.clear();
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let transaction = this.buffer.update(cx, |buffer, cx| {
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// Avoid grouping assistant edits with user edits.
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buffer.finalize_last_transaction(cx);
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buffer.start_transaction(cx);
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buffer.edit(
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hunks.into_iter().filter_map(|hunk| match hunk {
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Hunk::Insert { text } => {
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let edit_start = snapshot.anchor_after(edit_start);
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Some((edit_start..edit_start, text))
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}
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Hunk::Remove { len } => {
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let edit_end = edit_start + len;
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let edit_range = snapshot.anchor_after(edit_start)
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..snapshot.anchor_before(edit_end);
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edit_start = edit_end;
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Some((edit_range, String::new()))
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}
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Hunk::Keep { len } => {
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let edit_end = edit_start + len;
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let edit_range = snapshot.anchor_after(edit_start)
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..snapshot.anchor_before(edit_end);
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edit_start = edit_end;
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this.last_equal_ranges.push(edit_range);
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None
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}
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}),
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None,
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cx,
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);
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buffer.end_transaction(cx)
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});
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if let Some(transaction) = transaction {
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if let Some(first_transaction) = this.transaction_id {
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// Group all assistant edits into the first transaction.
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this.buffer.update(cx, |buffer, cx| {
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buffer.merge_transactions(
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transaction,
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first_transaction,
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cx,
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)
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});
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} else {
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this.transaction_id = Some(transaction);
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this.buffer.update(cx, |buffer, cx| {
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buffer.finalize_last_transaction(cx)
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});
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}
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}
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cx.notify();
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})?;
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}
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diff.await?;
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anyhow::Ok(())
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};
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let result = generate.await;
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this.update(&mut cx, |this, cx| {
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this.last_equal_ranges.clear();
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this.idle = true;
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if let Err(error) = result {
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this.error = Some(error);
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}
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cx.emit(Event::Finished);
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cx.notify();
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})
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.ok();
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}
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});
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self.error.take();
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self.idle = false;
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cx.notify();
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}
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pub fn undo(&mut self, cx: &mut ModelContext<Self>) {
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if let Some(transaction_id) = self.transaction_id {
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self.buffer
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.update(cx, |buffer, cx| buffer.undo_transaction(transaction_id, cx));
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}
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}
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}
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fn strip_invalid_spans_from_codeblock(
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stream: impl Stream<Item = Result<String>>,
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) -> impl Stream<Item = Result<String>> {
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let mut first_line = true;
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let mut buffer = String::new();
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let mut starts_with_markdown_codeblock = false;
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let mut includes_start_or_end_span = false;
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stream.filter_map(move |chunk| {
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let chunk = match chunk {
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Ok(chunk) => chunk,
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Err(err) => return future::ready(Some(Err(err))),
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};
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buffer.push_str(&chunk);
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if buffer.len() > "<|S|".len() && buffer.starts_with("<|S|") {
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includes_start_or_end_span = true;
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buffer = buffer
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.strip_prefix("<|S|>")
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.or_else(|| buffer.strip_prefix("<|S|"))
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.unwrap_or(&buffer)
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.to_string();
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} else if buffer.ends_with("|E|>") {
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includes_start_or_end_span = true;
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} else if buffer.starts_with("<|")
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|| buffer.starts_with("<|S")
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|| buffer.starts_with("<|S|")
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|| buffer.ends_with("|")
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|| buffer.ends_with("|E")
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|| buffer.ends_with("|E|")
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{
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return future::ready(None);
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}
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if first_line {
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if buffer == "" || buffer == "`" || buffer == "``" {
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return future::ready(None);
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} else if buffer.starts_with("```") {
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starts_with_markdown_codeblock = true;
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if let Some(newline_ix) = buffer.find('\n') {
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buffer.replace_range(..newline_ix + 1, "");
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first_line = false;
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} else {
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return future::ready(None);
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}
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}
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}
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let mut text = buffer.to_string();
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if starts_with_markdown_codeblock {
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text = text
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.strip_suffix("\n```\n")
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.or_else(|| text.strip_suffix("\n```"))
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.or_else(|| text.strip_suffix("\n``"))
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.or_else(|| text.strip_suffix("\n`"))
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.or_else(|| text.strip_suffix('\n'))
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.unwrap_or(&text)
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.to_string();
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}
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if includes_start_or_end_span {
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text = text
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.strip_suffix("|E|>")
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.or_else(|| text.strip_suffix("E|>"))
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.or_else(|| text.strip_prefix("|>"))
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.or_else(|| text.strip_prefix(">"))
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.unwrap_or(&text)
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.to_string();
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};
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if text.contains('\n') {
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first_line = false;
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}
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let remainder = buffer.split_off(text.len());
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let result = if buffer.is_empty() {
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None
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} else {
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Some(Ok(buffer.clone()))
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};
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buffer = remainder;
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future::ready(result)
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})
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}
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#[cfg(test)]
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mod tests {
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use std::sync::Arc;
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use super::*;
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use ai::test::FakeCompletionProvider;
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use futures::stream::{self};
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use gpui::{Context, TestAppContext};
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use indoc::indoc;
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use language::{language_settings, tree_sitter_rust, Buffer, Language, LanguageConfig, Point};
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use rand::prelude::*;
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use serde::Serialize;
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use settings::SettingsStore;
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#[derive(Serialize)]
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pub struct DummyCompletionRequest {
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pub name: String,
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}
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impl CompletionRequest for DummyCompletionRequest {
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fn data(&self) -> serde_json::Result<String> {
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serde_json::to_string(self)
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}
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}
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#[gpui::test(iterations = 10)]
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async fn test_transform_autoindent(cx: &mut TestAppContext, mut rng: StdRng) {
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cx.set_global(cx.update(SettingsStore::test));
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cx.update(language_settings::init);
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let text = indoc! {"
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fn main() {
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let x = 0;
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for _ in 0..10 {
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x += 1;
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}
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}
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"};
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let buffer =
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cx.build_model(|cx| Buffer::new(0, 0, text).with_language(Arc::new(rust_lang()), cx));
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let buffer = cx.build_model(|cx| MultiBuffer::singleton(buffer, cx));
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let range = buffer.read_with(cx, |buffer, cx| {
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let snapshot = buffer.snapshot(cx);
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snapshot.anchor_before(Point::new(1, 0))..snapshot.anchor_after(Point::new(4, 5))
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});
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let provider = Arc::new(FakeCompletionProvider::new());
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let codegen = cx.build_model(|cx| {
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Codegen::new(
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buffer.clone(),
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CodegenKind::Transform { range },
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provider.clone(),
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cx,
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)
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});
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let request = Box::new(DummyCompletionRequest {
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name: "test".to_string(),
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});
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codegen.update(cx, |codegen, cx| codegen.start(request, cx));
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let mut new_text = concat!(
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" let mut x = 0;\n",
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" while x < 10 {\n",
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" x += 1;\n",
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" }",
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);
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while !new_text.is_empty() {
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let max_len = cmp::min(new_text.len(), 10);
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let len = rng.gen_range(1..=max_len);
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let (chunk, suffix) = new_text.split_at(len);
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println!("CHUNK: {:?}", &chunk);
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provider.send_completion(chunk);
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new_text = suffix;
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cx.background_executor.run_until_parked();
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}
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provider.finish_completion();
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cx.background_executor.run_until_parked();
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assert_eq!(
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buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
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indoc! {"
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fn main() {
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let mut x = 0;
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while x < 10 {
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x += 1;
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}
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}
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"}
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);
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}
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#[gpui::test(iterations = 10)]
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async fn test_autoindent_when_generating_past_indentation(
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cx: &mut TestAppContext,
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mut rng: StdRng,
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) {
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cx.set_global(cx.update(SettingsStore::test));
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cx.update(language_settings::init);
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let text = indoc! {"
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fn main() {
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le
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}
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"};
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let buffer =
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cx.build_model(|cx| Buffer::new(0, 0, text).with_language(Arc::new(rust_lang()), cx));
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let buffer = cx.build_model(|cx| MultiBuffer::singleton(buffer, cx));
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let position = buffer.read_with(cx, |buffer, cx| {
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let snapshot = buffer.snapshot(cx);
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snapshot.anchor_before(Point::new(1, 6))
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});
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let provider = Arc::new(FakeCompletionProvider::new());
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let codegen = cx.build_model(|cx| {
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Codegen::new(
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buffer.clone(),
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CodegenKind::Generate { position },
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provider.clone(),
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cx,
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)
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});
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let request = Box::new(DummyCompletionRequest {
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name: "test".to_string(),
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});
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codegen.update(cx, |codegen, cx| codegen.start(request, cx));
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let mut new_text = concat!(
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"t mut x = 0;\n",
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"while x < 10 {\n",
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" x += 1;\n",
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"}", //
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);
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while !new_text.is_empty() {
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let max_len = cmp::min(new_text.len(), 10);
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let len = rng.gen_range(1..=max_len);
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let (chunk, suffix) = new_text.split_at(len);
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provider.send_completion(chunk);
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new_text = suffix;
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cx.background_executor.run_until_parked();
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}
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provider.finish_completion();
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cx.background_executor.run_until_parked();
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assert_eq!(
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buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
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indoc! {"
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fn main() {
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let mut x = 0;
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while x < 10 {
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x += 1;
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}
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}
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"}
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);
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}
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|
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#[gpui::test(iterations = 10)]
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async fn test_autoindent_when_generating_before_indentation(
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cx: &mut TestAppContext,
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mut rng: StdRng,
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) {
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cx.set_global(cx.update(SettingsStore::test));
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cx.update(language_settings::init);
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let text = concat!(
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"fn main() {\n",
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" \n",
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"}\n" //
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);
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let buffer =
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cx.build_model(|cx| Buffer::new(0, 0, text).with_language(Arc::new(rust_lang()), cx));
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let buffer = cx.build_model(|cx| MultiBuffer::singleton(buffer, cx));
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let position = buffer.read_with(cx, |buffer, cx| {
|
|
let snapshot = buffer.snapshot(cx);
|
|
snapshot.anchor_before(Point::new(1, 2))
|
|
});
|
|
let provider = Arc::new(FakeCompletionProvider::new());
|
|
let codegen = cx.build_model(|cx| {
|
|
Codegen::new(
|
|
buffer.clone(),
|
|
CodegenKind::Generate { position },
|
|
provider.clone(),
|
|
cx,
|
|
)
|
|
});
|
|
|
|
let request = Box::new(DummyCompletionRequest {
|
|
name: "test".to_string(),
|
|
});
|
|
codegen.update(cx, |codegen, cx| codegen.start(request, cx));
|
|
|
|
let mut new_text = concat!(
|
|
"let mut x = 0;\n",
|
|
"while x < 10 {\n",
|
|
" x += 1;\n",
|
|
"}", //
|
|
);
|
|
while !new_text.is_empty() {
|
|
let max_len = cmp::min(new_text.len(), 10);
|
|
let len = rng.gen_range(1..=max_len);
|
|
let (chunk, suffix) = new_text.split_at(len);
|
|
println!("{:?}", &chunk);
|
|
provider.send_completion(chunk);
|
|
new_text = suffix;
|
|
cx.background_executor.run_until_parked();
|
|
}
|
|
provider.finish_completion();
|
|
cx.background_executor.run_until_parked();
|
|
|
|
assert_eq!(
|
|
buffer.read_with(cx, |buffer, cx| buffer.snapshot(cx).text()),
|
|
indoc! {"
|
|
fn main() {
|
|
let mut x = 0;
|
|
while x < 10 {
|
|
x += 1;
|
|
}
|
|
}
|
|
"}
|
|
);
|
|
}
|
|
|
|
#[gpui::test]
|
|
async fn test_strip_invalid_spans_from_codeblock() {
|
|
assert_eq!(
|
|
strip_invalid_spans_from_codeblock(chunks("Lorem ipsum dolor", 2))
|
|
.map(|chunk| chunk.unwrap())
|
|
.collect::<String>()
|
|
.await,
|
|
"Lorem ipsum dolor"
|
|
);
|
|
assert_eq!(
|
|
strip_invalid_spans_from_codeblock(chunks("```\nLorem ipsum dolor", 2))
|
|
.map(|chunk| chunk.unwrap())
|
|
.collect::<String>()
|
|
.await,
|
|
"Lorem ipsum dolor"
|
|
);
|
|
assert_eq!(
|
|
strip_invalid_spans_from_codeblock(chunks("```\nLorem ipsum dolor\n```", 2))
|
|
.map(|chunk| chunk.unwrap())
|
|
.collect::<String>()
|
|
.await,
|
|
"Lorem ipsum dolor"
|
|
);
|
|
assert_eq!(
|
|
strip_invalid_spans_from_codeblock(chunks("```\nLorem ipsum dolor\n```\n", 2))
|
|
.map(|chunk| chunk.unwrap())
|
|
.collect::<String>()
|
|
.await,
|
|
"Lorem ipsum dolor"
|
|
);
|
|
assert_eq!(
|
|
strip_invalid_spans_from_codeblock(chunks(
|
|
"```html\n```js\nLorem ipsum dolor\n```\n```",
|
|
2
|
|
))
|
|
.map(|chunk| chunk.unwrap())
|
|
.collect::<String>()
|
|
.await,
|
|
"```js\nLorem ipsum dolor\n```"
|
|
);
|
|
assert_eq!(
|
|
strip_invalid_spans_from_codeblock(chunks("``\nLorem ipsum dolor\n```", 2))
|
|
.map(|chunk| chunk.unwrap())
|
|
.collect::<String>()
|
|
.await,
|
|
"``\nLorem ipsum dolor\n```"
|
|
);
|
|
assert_eq!(
|
|
strip_invalid_spans_from_codeblock(chunks("<|S|Lorem ipsum|E|>", 2))
|
|
.map(|chunk| chunk.unwrap())
|
|
.collect::<String>()
|
|
.await,
|
|
"Lorem ipsum"
|
|
);
|
|
|
|
assert_eq!(
|
|
strip_invalid_spans_from_codeblock(chunks("<|S|>Lorem ipsum", 2))
|
|
.map(|chunk| chunk.unwrap())
|
|
.collect::<String>()
|
|
.await,
|
|
"Lorem ipsum"
|
|
);
|
|
|
|
assert_eq!(
|
|
strip_invalid_spans_from_codeblock(chunks("```\n<|S|>Lorem ipsum\n```", 2))
|
|
.map(|chunk| chunk.unwrap())
|
|
.collect::<String>()
|
|
.await,
|
|
"Lorem ipsum"
|
|
);
|
|
assert_eq!(
|
|
strip_invalid_spans_from_codeblock(chunks("```\n<|S|Lorem ipsum|E|>\n```", 2))
|
|
.map(|chunk| chunk.unwrap())
|
|
.collect::<String>()
|
|
.await,
|
|
"Lorem ipsum"
|
|
);
|
|
fn chunks(text: &str, size: usize) -> impl Stream<Item = Result<String>> {
|
|
stream::iter(
|
|
text.chars()
|
|
.collect::<Vec<_>>()
|
|
.chunks(size)
|
|
.map(|chunk| Ok(chunk.iter().collect::<String>()))
|
|
.collect::<Vec<_>>(),
|
|
)
|
|
}
|
|
}
|
|
|
|
fn rust_lang() -> Language {
|
|
Language::new(
|
|
LanguageConfig {
|
|
name: "Rust".into(),
|
|
path_suffixes: vec!["rs".to_string()],
|
|
..Default::default()
|
|
},
|
|
Some(tree_sitter_rust::language()),
|
|
)
|
|
.with_indents_query(
|
|
r#"
|
|
(call_expression) @indent
|
|
(field_expression) @indent
|
|
(_ "(" ")" @end) @indent
|
|
(_ "{" "}" @end) @indent
|
|
"#,
|
|
)
|
|
.unwrap()
|
|
}
|
|
}
|