chore: refactor spacing
c907dc42
1 file(s) · +50 −38
| 7 | 7 | layout::{Constraint, Direction, Layout}, |
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| 8 | 8 | style::{Color, Modifier, Style}, |
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| 9 | 9 | text::{Line, Span, Text}, |
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| 10 | - | widgets::{Block, List, ListItem, ListState, Padding}, |
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| 10 | + | widgets::{Block, Padding, Paragraph}, |
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| 11 | 11 | }; |
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| 12 | 12 | ||
| 13 | 13 | struct Item { |
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| 207 | 207 | } |
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| 208 | 208 | ||
| 209 | 209 | fn app(terminal: &mut DefaultTerminal, items: &[Item]) -> std::io::Result<()> { |
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| 210 | - | let mut state = ListState::default(); |
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| 211 | - | state.select(Some(0)); |
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| 210 | + | let mut selected = 0; |
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| 211 | + | let mut scroll_offset = 0; |
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| 212 | 212 | ||
| 213 | 213 | loop { |
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| 214 | - | terminal.draw(|f| render(f, items, &mut state))?; |
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| 214 | + | terminal.draw(|f| render(f, items, selected, &mut scroll_offset))?; |
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| 215 | 215 | ||
| 216 | 216 | if let crossterm::event::Event::Key(KeyEvent { code, .. }) = crossterm::event::read()? { |
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| 217 | 217 | let len = items.len(); |
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| 218 | 218 | match code { |
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| 219 | 219 | KeyCode::Char('q') => break, |
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| 220 | 220 | KeyCode::Char('j') | KeyCode::Down => { |
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| 221 | - | let next = state |
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| 222 | - | .selected() |
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| 223 | - | .map(|i| (i + 1).min(len.saturating_sub(1))) |
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| 224 | - | .unwrap_or(0); |
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| 225 | - | state.select(Some(next)); |
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| 221 | + | selected = (selected + 1).min(len.saturating_sub(1)); |
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| 226 | 222 | } |
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| 227 | 223 | KeyCode::Char('k') | KeyCode::Up => { |
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| 228 | - | let prev = state.selected().map(|i| i.saturating_sub(1)).unwrap_or(0); |
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| 229 | - | state.select(Some(prev)); |
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| 224 | + | selected = selected.saturating_sub(1); |
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| 230 | 225 | } |
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| 231 | 226 | KeyCode::Enter => { |
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| 232 | - | if let Some(i) = state.selected() { |
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| 233 | - | if let Some(url) = items[i].url.as_deref() { |
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| 234 | - | let _ = open::that(url); |
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| 235 | - | } |
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| 227 | + | if let Some(url) = items[selected].url.as_deref() { |
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| 228 | + | let _ = open::that(url); |
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| 236 | 229 | } |
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| 237 | 230 | } |
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| 238 | 231 | _ => {} |
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| 254 | 247 | format!("{} {}{}, {}", dt.format("%B"), day, suffix, dt.format("%Y")) |
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| 255 | 248 | } |
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| 256 | 249 | ||
| 257 | - | fn render(frame: &mut Frame, items: &[Item], state: &mut ListState) { |
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| 250 | + | fn render(frame: &mut Frame, items: &[Item], selected: usize, scroll_offset: &mut u16) { |
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| 258 | 251 | let outer = frame.area(); |
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| 259 | 252 | let [_, center, _] = Layout::default() |
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| 260 | 253 | .direction(Direction::Horizontal) |
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| 274 | 267 | .fg(Color::DarkGray) |
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| 275 | 268 | .add_modifier(Modifier::ITALIC); |
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| 276 | 269 | ||
| 277 | - | let selected = state.selected(); |
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| 278 | - | let list_items: Vec<ListItem> = items |
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| 279 | - | .iter() |
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| 280 | - | .enumerate() |
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| 281 | - | .map(|(i, item)| { |
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| 282 | - | let bar = if selected == Some(i) { "▌ " } else { " " }; |
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| 283 | - | let mut lines = vec![Line::from(vec![ |
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| 284 | - | Span::raw(bar), |
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| 285 | - | Span::styled(item.date.clone(), dim), |
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| 286 | - | ])]; |
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| 287 | - | for wrapped in textwrap::wrap(&item.title, title_width.max(1)) { |
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| 288 | - | lines.push(Line::from(vec![ |
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| 289 | - | Span::raw(bar), |
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| 290 | - | Span::raw(wrapped.into_owned()), |
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| 291 | - | ])); |
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| 292 | - | } |
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| 270 | + | let mut selected_start = 0; |
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| 271 | + | let mut selected_end = 0; |
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| 272 | + | let mut lines = Vec::new(); |
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| 273 | + | for (i, item) in items.iter().enumerate() { |
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| 274 | + | if i == selected { |
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| 275 | + | selected_start = lines.len(); |
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| 276 | + | } |
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| 277 | + | ||
| 278 | + | let bar = if i == selected { "▌ " } else { " " }; |
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| 279 | + | lines.push(Line::from(vec![ |
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| 280 | + | Span::raw(bar), |
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| 281 | + | Span::styled(item.date.clone(), dim), |
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| 282 | + | ])); |
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| 283 | + | for wrapped in textwrap::wrap(&item.title, title_width.max(1)) { |
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| 293 | 284 | lines.push(Line::from(vec![ |
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| 294 | 285 | Span::raw(bar), |
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| 295 | - | Span::styled(item.author.clone(), author_style), |
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| 286 | + | Span::raw(wrapped.into_owned()), |
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| 296 | 287 | ])); |
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| 297 | - | lines.push(Line::from("")); |
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| 288 | + | } |
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| 289 | + | lines.push(Line::from(vec![ |
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| 290 | + | Span::raw(bar), |
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| 291 | + | Span::styled(item.author.clone(), author_style), |
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| 292 | + | ])); |
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| 293 | + | lines.push(Line::from("")); |
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| 294 | + | ||
| 295 | + | if i == selected { |
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| 296 | + | selected_end = lines.len(); |
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| 297 | + | } |
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| 298 | + | } |
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| 298 | 299 | ||
| 299 | - | ListItem::new(Text::from(lines)) |
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| 300 | - | }) |
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| 301 | - | .collect(); |
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| 300 | + | let viewport_height = inner.height as usize; |
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| 301 | + | if viewport_height > 0 { |
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| 302 | + | let mut offset = *scroll_offset as usize; |
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| 303 | + | if selected_start < offset { |
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| 304 | + | offset = selected_start; |
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| 305 | + | } else if selected_end > offset + viewport_height { |
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| 306 | + | offset = selected_end.saturating_sub(viewport_height); |
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| 307 | + | } |
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| 308 | + | offset = offset.min(lines.len().saturating_sub(viewport_height)); |
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| 309 | + | *scroll_offset = offset.min(u16::MAX as usize) as u16; |
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| 310 | + | } |
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| 302 | 311 | ||
| 303 | 312 | frame.render_widget(block, center); |
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| 304 | - | frame.render_stateful_widget(List::new(list_items).highlight_symbol(""), inner, state); |
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| 313 | + | frame.render_widget( |
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| 314 | + | Paragraph::new(Text::from(lines)).scroll((*scroll_offset, 0)), |
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| 315 | + | inner, |
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| 316 | + | ); |
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| 305 | 317 | } |
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