use ratatui::{
Frame,
layout::{Constraint, Flex, Layout, Rect},
style::{Color, Modifier, Style},
text::{Line, Span},
widgets::{Block, Borders, Clear, Paragraph},
};
use crate::app::App;
use crate::ui::styles;
pub fn render_help(frame: &mut Frame, app: &mut App) {
let area = centered_rect(60, 70, frame.area());
frame.render_widget(Clear, area);
let block = Block::default()
.title(" Help (j/k to scroll) - Press ? or Esc to close ")
.borders(Borders::ALL)
.border_style(styles::border_style(true));
let inner = block.inner(area);
frame.render_widget(block, area);
let help_text = vec![
Line::from(Span::styled(
"Navigation",
Style::default().add_modifier(Modifier::BOLD | Modifier::UNDERLINED),
)),
Line::from(""),
Line::from(vec![
Span::styled(
" j/k ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Scroll down/up"),
]),
Line::from(vec![
Span::styled(
" Ctrl-d/u ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Half page down/up"),
]),
Line::from(vec![
Span::styled(
" Ctrl-f/b ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Full page down/up"),
]),
Line::from(vec![
Span::styled(
" g/G ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Go to first/last file"),
]),
Line::from(vec![
Span::styled(
" {/} ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Jump to prev/next file"),
]),
Line::from(vec![
Span::styled(
" [/] ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Jump to prev/next hunk"),
]),
Line::from(vec![
Span::styled(
" / ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Search within diff"),
]),
Line::from(vec![
Span::styled(
" n/N ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Next/prev search match"),
]),
Line::from(vec![
Span::styled(
" Enter ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Expand/collapse hidden context"),
]),
Line::from(vec![
Span::styled(
" Tab ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Toggle focus file list/diff"),
]),
Line::from(vec![
Span::styled(
" ;h/;l ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Focus file list/diff"),
]),
Line::from(vec![
Span::styled(
" ;e ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Toggle file list visibility"),
]),
Line::from(""),
Line::from(Span::styled(
"File Tree",
Style::default().add_modifier(Modifier::BOLD | Modifier::UNDERLINED),
)),
Line::from(""),
Line::from(vec![
Span::styled(
" Space ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Toggle expand directory"),
]),
Line::from(vec![
Span::styled(
" Enter ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Expand dir / Jump to file"),
]),
Line::from(vec![
Span::styled(
" o ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Expand all directories"),
]),
Line::from(vec![
Span::styled(
" O ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Collapse all directories"),
]),
Line::from(""),
Line::from(Span::styled(
"Review Actions",
Style::default().add_modifier(Modifier::BOLD | Modifier::UNDERLINED),
)),
Line::from(""),
Line::from(vec![
Span::styled(
" r ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Toggle file reviewed"),
]),
Line::from(vec![
Span::styled(
" c ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Add line comment"),
]),
Line::from(vec![
Span::styled(
" C ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Add file comment"),
]),
Line::from(vec![
Span::styled(
" i ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Edit comment at cursor"),
]),
Line::from(vec![
Span::styled(
" dd ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Delete comment at cursor"),
]),
Line::from(vec![
Span::styled(
" y ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Yank (copy) review to clipboard"),
]),
Line::from(vec![
Span::styled(
" v ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Toggle unified/side-by-side diff view"),
]),
Line::from(""),
Line::from(Span::styled(
"Comment Mode",
Style::default().add_modifier(Modifier::BOLD | Modifier::UNDERLINED),
)),
Line::from(""),
Line::from(vec![
Span::styled(
" Tab ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Toggle type: Note/Suggestion/Issue/Praise"),
]),
Line::from(vec![
Span::styled(
" Ctrl-S ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Save comment"),
]),
Line::from(vec![
Span::styled(
" Ctrl-A/E ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Line start/end"),
]),
Line::from(vec![
Span::styled(
" Ctrl/Alt-Left/Right",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Word left/right"),
]),
Line::from(vec![
Span::styled(
" Cmd-Left/Right",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Line start/end (macOS)"),
]),
Line::from(vec![
Span::styled(
" Esc/Ctrl-C",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Cancel"),
]),
Line::from(""),
Line::from(Span::styled(
"Commands",
Style::default().add_modifier(Modifier::BOLD | Modifier::UNDERLINED),
)),
Line::from(""),
Line::from(vec![
Span::styled(
" :w ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Save review session"),
]),
Line::from(vec![
Span::styled(
" :e ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Reload diff files"),
]),
Line::from(vec![
Span::styled(
" :clip ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Copy review to clipboard"),
]),
Line::from(vec![
Span::styled(
" :set wrap ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Enable line wrap in diff view"),
]),
Line::from(vec![
Span::styled(
" :set wrap!",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Toggle line wrap in diff view"),
]),
Line::from(vec![
Span::styled(
" :clear ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Clear all comments"),
]),
Line::from(vec![
Span::styled(
" :q ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Quit"),
]),
Line::from(vec![
Span::styled(
" :wq ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Save and quit"),
]),
Line::from(""),
Line::from(vec![
Span::styled(
" ? ",
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw("Toggle this help"),
]),
];
let total_lines = help_text.len();
let viewport_height = inner.height as usize;
app.help_state.total_lines = total_lines;
app.help_state.viewport_height = viewport_height;
let can_scroll_up = app.help_state.scroll_offset > 0;
let can_scroll_down = app.help_state.scroll_offset + viewport_height < total_lines;
let visible_lines: Vec<Line> = help_text
.into_iter()
.skip(app.help_state.scroll_offset)
.take(viewport_height)
.collect();
let paragraph = Paragraph::new(visible_lines);
frame.render_widget(paragraph, inner);
let indicator_style = Style::default().fg(Color::DarkGray);
if can_scroll_up {
let up_indicator = Paragraph::new(Line::from(Span::styled("▲ more", indicator_style)));
let up_area = Rect {
x: inner.x + inner.width.saturating_sub(8),
y: inner.y,
width: 7,
height: 1,
};
frame.render_widget(up_indicator, up_area);
}
if can_scroll_down {
let down_indicator = Paragraph::new(Line::from(Span::styled("▼ more", indicator_style)));
let down_area = Rect {
x: inner.x + inner.width.saturating_sub(8),
y: inner.y + inner.height.saturating_sub(1),
width: 7,
height: 1,
};
frame.render_widget(down_indicator, down_area);
}
}
fn centered_rect(percent_x: u16, percent_y: u16, area: Rect) -> Rect {
let vertical = Layout::vertical([Constraint::Percentage(percent_y)]).flex(Flex::Center);
let horizontal = Layout::horizontal([Constraint::Percentage(percent_x)]).flex(Flex::Center);
let [area] = vertical.areas(area);
let [area] = horizontal.areas(area);
area
}