#[cfg_attr(not(test), expect(clippy::wildcard_imports, reason = "shared"))]
use super::*;
#[expect(
clippy::too_many_arguments,
reason = "diff rendering returns file hits while registering review hits"
)]
pub(super) fn draw_unified_diff(
frame: &mut Frame<'_>,
area: Rect,
app: &App,
rows: &[usize],
diff_scroll: usize,
review_hits: &mut Vec<ContentReviewHit>,
theme: &Theme,
) -> Vec<ContentFileHit> {
let first_index = rows.get(diff_scroll).copied().unwrap_or_default();
let emphasis = visible_intraline_emphasis(
&app.document.lines,
rows.iter()
.copied()
.skip(diff_scroll)
.take(area.height as usize),
);
let sticky = app
.document
.lines
.get(first_index)
.filter(|line| line.kind != DiffLineKind::FileHeader)
.and_then(|_| app.preview_header_at(first_index));
let content_y = area.y + u16::from(sticky.is_some());
let content_height = area.height.saturating_sub(u16::from(sticky.is_some()));
let mut hits = Vec::new();
let mut image_state = ImageDrawState::new(rows.len() <= usize::from(content_height));
if let Some(header) = sticky {
let sticky_area = Rect::new(area.x, area.y, area.width, 1);
draw_file_header(frame, sticky_area, header, app, theme);
if let Some(path) = file_header_path(header) {
hits.push(ContentFileHit {
area: sticky_area,
path: path.into(),
});
}
}
for (offset, line_index) in rows
.iter()
.copied()
.skip(diff_scroll)
.take(content_height as usize)
.enumerate()
{
let Some(line) = app.document.lines.get(line_index) else {
continue;
};
let row_area = Rect::new(area.x, content_y + cells(offset), area.width, 1);
if let Some(thread_id) = app.pull_request_review_line_threads.get(&line_index) {
review_hits.push(ContentReviewHit {
area: row_area,
thread_id: thread_id.clone(),
});
}
match line.kind {
DiffLineKind::FileHeader => {
draw_file_header(frame, row_area, line, app, theme);
if let Some(path) = file_header_path(line) {
hits.push(ContentFileHit {
area: row_area,
path: path.into(),
});
}
}
DiffLineKind::FileFooter => {
draw_file_footer(frame, row_area, theme);
}
DiffLineKind::Image => draw_image_line(
frame,
row_area,
line,
content_height.saturating_sub(cells(offset)),
theme,
selected_image_protocol(),
&mut image_state,
),
_ => draw_unified_line(
frame,
row_area,
line,
app.horizontal_scroll,
emphasis.get(&line_index),
review_line_selected(app, line, None),
theme,
),
}
}
hits
}
#[expect(
clippy::too_many_arguments,
reason = "the renderer needs the whole row context in one call"
)]
pub(super) fn draw_unified_line(
frame: &mut Frame<'_>,
area: Rect,
line: &DiffLine,
horizontal_scroll: usize,
emphasis: Option<&Range<usize>>,
selected: bool,
theme: &Theme,
) {
let content_area = area;
let old = line
.old_line
.map_or(String::new(), |number| number.to_string());
let new = line
.new_line
.map_or(String::new(), |number| number.to_string());
let (marker, marker_style) = marker_for(line.kind, theme);
let mut spans = vec![
Span::styled(format!("{old:>4} "), Style::default().fg(theme.muted)),
Span::styled(format!("{new:>4} "), Style::default().fg(theme.muted)),
Span::styled(marker, marker_style),
];
spans.extend(highlight_spans(
&line.spans,
horizontal_scroll,
content_area.width.saturating_sub(12) as usize,
line.kind,
emphasis,
theme,
));
frame.render_widget(
Paragraph::new(Line::from(spans)).style(line_background(line.kind, selected, theme)),
content_area,
);
}
pub(super) fn file_header_path(line: &DiffLine) -> Option<&str> {
line.spans
.first()
.map(|span| span.text.split(" · ").next().unwrap_or(span.text.as_str()))
}
pub(super) fn draw_file_header(
frame: &mut Frame<'_>,
area: Rect,
line: &DiffLine,
app: &App,
theme: &Theme,
) {
if area.width == 0 {
return;
}
let label = line
.spans
.first()
.map(|span| span.text.as_str())
.unwrap_or_default();
let disclosure = if app.preview_files_collapsible() {
disclosure_glyph(
file_header_path(line).is_none_or(|path| !app.preview_file_collapsed(path)),
)
} else {
" "
};
let additions = line.spans.get(1).map_or("+0", |span| span.text.as_str());
let deletions = line.spans.get(2).map_or("-0", |span| span.text.as_str());
let path = file_header_path(line).unwrap_or(label);
let icon = file_icon_span(Path::new(path), theme);
let reserved = 10_usize + additions.width() + deletions.width();
let label_width = (area.width as usize).saturating_sub(reserved);
let label = if label.width() <= label_width {
label.to_owned()
} else {
truncate_path(path, label_width)
};
let fill = (area.width as usize)
.saturating_sub(reserved)
.saturating_sub(label.width());
let selected = file_header_path(line).is_some_and(|path| app.preview_file_selected(path));
let background = if selected {
theme.selected
} else {
theme.panel_alt
};
frame.render_widget(
Paragraph::new(Line::from(vec![
Span::styled("─", Style::default().fg(theme.border)),
Span::styled(format!(" {disclosure} "), Style::default().fg(theme.muted)),
icon,
Span::raw(" "),
Span::styled(
label,
Style::default().fg(theme.text).add_modifier(Modifier::BOLD),
),
Span::styled("─".repeat(fill), Style::default().fg(theme.border)),
Span::styled(" ", Style::default()),
Span::styled(
additions.to_owned(),
Style::default()
.fg(theme.added)
.add_modifier(Modifier::BOLD),
),
Span::styled(" ", Style::default()),
Span::styled(
deletions.to_owned(),
Style::default()
.fg(theme.removed)
.add_modifier(Modifier::BOLD),
),
Span::styled(" ─", Style::default().fg(theme.border)),
]))
.style(Style::default().bg(background)),
area,
);
}
pub(super) fn draw_file_footer(frame: &mut Frame<'_>, area: Rect, theme: &Theme) {
if area.width == 0 {
return;
}
frame.render_widget(
Paragraph::new("─".repeat(area.width as usize))
.style(Style::default().fg(theme.border).bg(theme.panel)),
area,
);
}