Code diff

let tokens = cx.theme().semantic_tokens();
let mut file = DiffFile::from_unified(DEMO_PATCH).remove(0);
let hunks: Vec<DiffHunk> = file
    .hunk_refs()
    .iter()
    .cloned()
    .enumerate()
    .map(|(index, hunk)| {
        hunk.review(
            self.hunk_reviews
                .get(&index)
                .copied()
                .unwrap_or_default(),
        )
    })
    .collect();
file = file.hunks(hunks);
let status: SharedString = self
    .last_diff_event
    .clone()
    .unwrap_or_else(|| "Accept or reject a hunk, or collapse the file".into());
v_flex()
    .gap(tokens.spacing.md)
    .child(
        CodeDiff::new("proposed-patch", &file)
            .open(self.diff_open)
            .reviewable(true)
            .on_event(cx.listener(|this, event: &CodeDiffEvent, _, cx| {
                match event {
                    CodeDiffEvent::Toggled { .. } => {
                        this.diff_open = !this.diff_open;
                    }
                    CodeDiffEvent::HunkAccepted { hunk, .. } => {
                        this.hunk_reviews.insert(*hunk, HunkReview::Accepted);
                    }
                    CodeDiffEvent::HunkRejected { hunk, .. } => {
                        this.hunk_reviews.insert(*hunk, HunkReview::Rejected);
                    }
                }
                this.last_diff_event = Some(format!("{event:?}").into());
                cx.notify();
            })),
    )
    .child(
        div()
            .id("code-diff-story-status")
            .role(Role::Status)
            .aria_label(status.clone())
            .text_xs()
            .text_color(cx.theme().muted_foreground)
            .child(status),
    )