#[cfg_attr(not(test), expect(clippy::wildcard_imports, reason = "shared"))]
use super::*;
pub(super) fn draw_full_width_diff_line(
frame: &mut Frame<'_>,
area: Rect,
line: &DiffLine,
_boxed: bool,
horizontal_scroll: usize,
theme: &Theme,
) {
let content_area = area;
let (marker, marker_style) = marker_for(line.kind, theme);
let mut spans = vec![Span::styled(marker, marker_style)];
spans.extend(highlight_spans(
&line.spans,
horizontal_scroll,
content_area.width.saturating_sub(2) as usize,
line.kind,
None,
theme,
));
frame.render_widget(
Paragraph::new(Line::from(spans)).style(line_background(line.kind, false, theme)),
content_area,
);
}
#[expect(
clippy::too_many_arguments,
reason = "the renderer needs the whole row context in one call"
)]
pub(super) fn draw_diff_side(
frame: &mut Frame<'_>,
area: Rect,
line: Option<&DiffLine>,
old_side: bool,
horizontal_scroll: usize,
emphasis: Option<&Range<usize>>,
selected: bool,
theme: &Theme,
) {
let Some(line) = line else {
frame.render_widget(
Paragraph::new(" ").style(Style::default().bg(theme.panel_alt)),
area,
);
return;
};
let number = if old_side {
line.old_line
} else {
line.new_line
};
let number = number.map_or(String::new(), |number| number.to_string());
let (marker, marker_style) = marker_for(line.kind, theme);
let mut spans = vec![
Span::styled(format!("{number:>4} "), Style::default().fg(theme.muted)),
Span::styled(marker, marker_style),
];
spans.extend(highlight_spans(
&line.spans,
horizontal_scroll,
area.width.saturating_sub(7) as usize,
line.kind,
emphasis,
theme,
));
frame.render_widget(
Paragraph::new(Line::from(spans)).style(line_background(line.kind, selected, theme)),
area,
);
}
pub(super) fn highlight_spans<'a>(
spans: &'a [HighlightSpan],
horizontal_scroll: usize,
width: usize,
kind: DiffLineKind,
emphasis: Option<&Range<usize>>,
theme: &Theme,
) -> Vec<Span<'a>> {
let mut skip = horizontal_scroll;
let mut remaining = width;
let mut source_offset = 0;
let mut output = Vec::new();
for span in spans {
if remaining == 0 {
break;
}
let foreground = span.foreground.map_or_else(
|| line_foreground(kind, theme),
|syntax| theme.syntax(syntax),
);
let mut style = Style::default().fg(foreground);
if span.bold {
style = style.add_modifier(Modifier::BOLD);
}
if span.italic {
style = style.add_modifier(Modifier::ITALIC);
}
let span_start = source_offset;
let span_end = span_start + span.text.len();
let intersection = emphasis.and_then(|range| {
let start = range.start.max(span_start);
let end = range.end.min(span_end);
(start < end).then_some(start..end)
});
if let Some(changed) = intersection {
push_highlight_piece(
&mut output,
span.text
.get(..changed.start - span_start)
.unwrap_or_default(),
style,
false,
kind,
theme,
&mut skip,
&mut remaining,
);
push_highlight_piece(
&mut output,
span.text
.get(changed.start - span_start..changed.end - span_start)
.unwrap_or_default(),
style,
true,
kind,
theme,
&mut skip,
&mut remaining,
);
push_highlight_piece(
&mut output,
span.text
.get(changed.end - span_start..)
.unwrap_or_default(),
style,
false,
kind,
theme,
&mut skip,
&mut remaining,
);
} else {
push_highlight_piece(
&mut output,
&span.text,
style,
false,
kind,
theme,
&mut skip,
&mut remaining,
);
}
source_offset = span_end;
}
output
}
#[expect(
clippy::too_many_arguments,
reason = "the renderer needs the whole row context in one call"
)]
pub(super) fn push_highlight_piece(
output: &mut Vec<Span<'_>>,
text: &str,
mut style: Style,
emphasized: bool,
kind: DiffLineKind,
theme: &Theme,
skip: &mut usize,
remaining: &mut usize,
) {
if text.is_empty() || *remaining == 0 {
return;
}
let text_width = text.width();
if *skip >= text_width {
*skip -= text_width;
return;
}
if emphasized {
style = match kind {
DiffLineKind::Added => style.bg(theme.added_emphasis_background),
DiffLineKind::Removed => style.bg(theme.removed_emphasis_background),
_ => style,
};
}
let sliced = slice_width(text, *skip, *remaining);
*skip = 0;
*remaining = remaining.saturating_sub(sliced.width());
output.push(Span::styled(sliced, style));
}
pub(super) fn marker_for(kind: DiffLineKind, theme: &Theme) -> (&'static str, Style) {
match kind {
DiffLineKind::Added => (" ", Style::default().fg(theme.added)),
DiffLineKind::Removed => (" ", Style::default().fg(theme.removed)),
DiffLineKind::HunkHeader => (
" ",
Style::default()
.fg(theme.accent)
.add_modifier(Modifier::BOLD),
),
DiffLineKind::Review => (
"│ ",
Style::default()
.fg(theme.modified)
.add_modifier(Modifier::BOLD),
),
DiffLineKind::Context | DiffLineKind::Meta => (" ", Style::default().fg(theme.muted)),
DiffLineKind::FileHeader | DiffLineKind::FileFooter => {
("", Style::default().fg(theme.muted))
}
}
}
pub(super) fn line_background(kind: DiffLineKind, selected: bool, theme: &Theme) -> Style {
if selected {
return Style::default().bg(theme.selected);
}
match kind {
DiffLineKind::Added => Style::default().bg(theme.added_background),
DiffLineKind::Removed => Style::default().bg(theme.removed_background),
DiffLineKind::HunkHeader => Style::default().bg(theme.panel_alt).fg(theme.accent),
DiffLineKind::Review => Style::default().bg(theme.panel_alt),
_ => Style::default().bg(theme.panel),
}
}
pub(super) const fn line_foreground(kind: DiffLineKind, theme: &Theme) -> Color {
match kind {
DiffLineKind::Added => theme.added,
DiffLineKind::Removed => theme.removed,
DiffLineKind::HunkHeader => theme.accent,
_ => theme.text,
}
}
#[expect(clippy::integer_division, reason = "layout maths works in whole cells")]
pub(super) fn draw_scrollbar(
frame: &mut Frame<'_>,
area: Rect,
offset: usize,
length: usize,
theme: &Theme,
) {
if length <= area.height as usize || area.width == 0 {
return;
}
let height = area.height as usize;
let thumb_height = (height * height / length).max(1).min(height);
let max_offset = length.saturating_sub(height).max(1);
let thumb_start = offset.min(max_offset) * (height - thumb_height) / max_offset;
for row in thumb_start..thumb_start + thumb_height {
frame.render_widget(
Paragraph::new("▐").style(Style::default().fg(theme.accent_soft)),
Rect::new(area.right().saturating_sub(1), area.y + cells(row), 1, 1),
);
}
}
#[expect(
clippy::option_if_let_else,
reason = "the branch is one arm of a longer chain that map_or_else cannot express"
)]
pub(super) fn draw_footer(
frame: &mut Frame<'_>,
area: Rect,
app: &App,
theme: &Theme,
link_hits: &mut Vec<LinkHit>,
project_hits: &mut Vec<Rect>,
) {
let left = if let Some(busy) = app.busy.as_deref() {
Line::from(vec![
Span::styled(
format!(" {} ", app.operation_spinner()),
Style::default()
.fg(theme.accent)
.add_modifier(Modifier::BOLD),
),
Span::styled(busy, Style::default().fg(theme.text)),
])
} else if let Some(progress) = app.pull_request_progress {
Line::from(vec![
Span::styled(
format!(" {} ", app.operation_spinner()),
Style::default()
.fg(theme.accent)
.add_modifier(Modifier::BOLD),
),
Span::styled(
format!("{} ", progress.label()),
Style::default().fg(theme.text),
),
Span::styled(
progress_bar(progress.percent(), 12),
Style::default().fg(theme.accent),
),
Span::styled(
format!(" {}%", progress.percent()),
Style::default().fg(theme.muted),
),
])
} else if app.refreshing {
Line::from(Span::styled(
" Refreshing repository…",
Style::default().fg(theme.muted),
))
} else {
let branch = if app.status.branch.head.is_empty() {
"—".to_owned()
} else {
app.status.branch.head.clone()
};
let summary = format!(
" {} changes {} staged",
app.status.changes.len(),
app.status.staged_count()
);
let (worktree_gap, worktree_label) = if app.worktrees.len() > 1 {
let mut label = String::new();
label.push_str(&app.worktrees.len().to_string());
label.push_str(" worktrees");
let gap = " ";
let prefix_width = cells(" ".width())
.saturating_add(cells(branch.width()))
.saturating_add(cells(summary.width()))
.saturating_add(cells(gap.width()));
project_hits.push(clipped_link_area(
area.x.saturating_add(prefix_width),
area.y.saturating_add(1),
label.width(),
area,
));
(gap, label)
} else {
("", String::new())
};
Line::from(vec![
Span::styled(" ", Style::default().fg(theme.accent)),
link_span(
branch.clone(),
app.branch_open_target(&app.status.branch.head),
clipped_link_area(
area.x.saturating_add(cells(" ".width())),
area.y.saturating_add(1),
branch.width(),
area,
),
theme,
link_hits,
),
Span::styled(summary, Style::default().fg(theme.muted)),
Span::raw(worktree_gap),
Span::styled(
worktree_label,
Style::default()
.fg(theme.accent)
.add_modifier(Modifier::UNDERLINED),
),
])
};
frame.render_widget(
Paragraph::new(left)
.style(Style::default().bg(theme.panel_alt))
.block(
Block::default()
.borders(Borders::TOP)
.border_style(Style::default().fg(theme.border)),
),
area,
);
}