use crate::app::{AppState, CommitTarget, PreviewKind, Tab};
use ratatui::prelude::*;
use ratatui::style::{Color, Modifier, Style};
use ratatui::text::{Line, Span, Text};
use ratatui::widgets::{Block, Borders, Clear, List, ListItem, ListState, Paragraph, Tabs, Wrap};
pub fn draw(frame: &mut Frame, state: &mut AppState) {
let mut cursor = None;
let areas = Layout::default()
.direction(Direction::Vertical)
.constraints([
Constraint::Length(3),
Constraint::Min(0),
Constraint::Length(4),
])
.split(frame.area());
let tabs = Tabs::new(vec!["Working tree", "File history", "Timeline"])
.select(match state.tab {
Tab::WorkingTree => 0,
Tab::FileHistory => 1,
Tab::Timeline => 2,
})
.block(Block::default().borders(Borders::ALL).title("lazyfossil"));
frame.render_widget(tabs, areas[0]);
let body = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(35), Constraint::Percentage(65)])
.split(areas[1]);
let mut file_state = match state.tab {
Tab::WorkingTree => ListState::default().with_offset(state.files_scroll),
Tab::FileHistory => ListState::default().with_offset(state.history_scroll),
Tab::Timeline => ListState::default().with_offset(state.timeline_scroll),
};
let left = if let Some(repo) = &state.repo {
match state.tab {
Tab::Timeline => {
file_state.select(Some(state.timeline_selected));
let items: Vec<ListItem> = repo
.timeline
.iter()
.enumerate()
.map(|(i, t)| {
let prefix = if i == state.timeline_selected {
">"
} else {
" "
};
let mut spans = Vec::new();
spans.push(Span::raw(format!("{}{}", prefix, t.rid)));
if !t.tags.is_empty() {
spans.push(Span::raw(" "));
spans.push(Span::styled(
format!("[{}]", t.tags),
Style::default().fg(Color::Cyan),
));
}
spans.push(Span::raw(format!(" {}", t.message)));
ListItem::new(Line::from(spans))
})
.collect();
List::new(items)
.highlight_style(Style::default().add_modifier(Modifier::REVERSED))
.block(Block::default().borders(Borders::ALL).title("Timeline"))
}
Tab::FileHistory => {
file_state.select(Some(state.history_selected));
let items: Vec<ListItem> = if state.history.is_empty() {
vec![ListItem::new("No history entries found")]
} else {
state
.history
.iter()
.enumerate()
.map(|(i, t)| {
let prefix = if i == state.history_selected {
">"
} else {
" "
};
ListItem::new(format!("{}{} {}", prefix, t.rid, t.message))
})
.collect()
};
List::new(items)
.highlight_style(Style::default().add_modifier(Modifier::REVERSED))
.block(Block::default().borders(Borders::ALL).title("File history"))
}
_ => {
file_state.select(Some(repo.selected_file));
let items: Vec<ListItem> = repo
.files
.iter()
.enumerate()
.map(|(i, f)| {
let prefix = if i == repo.selected_file { ">" } else { " " };
let selected = if state.selected_files.iter().any(|p| p == &f.path) {
"*"
} else {
" "
};
let kind = match f.status.as_str() {
"extra" => "??",
"edited" => "M",
"added" => "A",
"deleted" => "D",
"missing" => "!",
"conflict" => "C",
_ => "✓",
};
let mut item =
ListItem::new(format!("{}{} {} {}", prefix, selected, kind, f.path));
if f.status == "checked-out" {
item = item.style(Style::default().fg(Color::Green));
} else if f.status == "edited" {
item = item.style(Style::default().fg(Color::LightRed));
} else if f.status == "missing" {
item = item.style(Style::default().fg(Color::Red));
}
item
})
.collect();
List::new(items)
.highlight_style(Style::default().add_modifier(Modifier::REVERSED))
.block(Block::default().borders(Borders::ALL).title("Files"))
}
}
} else {
List::new(vec![ListItem::new("No repository detected")])
.block(Block::default().borders(Borders::ALL).title("Files"))
};
let right = if state.repo.is_some() {
match state.tab {
Tab::WorkingTree => {
let diff = state
.diff
.clone()
.unwrap_or_else(|| "Select a file to view diff".to_string());
Paragraph::new(color_preview(diff, state.preview_kind))
.scroll((state.diff_scroll, 0))
.block(
Block::default()
.borders(Borders::ALL)
.title(preview_title(state.preview_kind)),
)
.wrap(Wrap { trim: false })
}
Tab::FileHistory => {
let mut lines = Vec::new();
if let Some(repo) = &state.repo {
if let Some(file) = repo.files.get(repo.selected_file) {
lines.push(Line::from(vec![
Span::styled("file ", Style::default().fg(Color::DarkGray)),
Span::styled(file.path.clone(), Style::default().fg(Color::Yellow)),
]));
lines.push(Line::from(vec![
Span::styled("entries ", Style::default().fg(Color::DarkGray)),
Span::styled(
state.history.len().to_string(),
Style::default().fg(Color::White),
),
]));
lines.push(Line::from(""));
}
}
if let Some(entry) = state.history.get(state.history_selected) {
lines.push(Line::from(vec![
Span::styled("commit ", Style::default().fg(Color::DarkGray)),
Span::styled(entry.rid.clone(), Style::default().fg(Color::Yellow)),
]));
lines.push(Line::from(vec![
Span::styled("author ", Style::default().fg(Color::DarkGray)),
Span::raw(entry.user.clone()),
Span::raw(" "),
Span::styled(entry.date.clone(), Style::default().fg(Color::DarkGray)),
]));
lines.push(Line::from(vec![
Span::styled("message ", Style::default().fg(Color::DarkGray)),
Span::raw(entry.message.clone()),
]));
if !entry.tags.is_empty() {
lines.push(Line::from(vec![
Span::styled("tags ", Style::default().fg(Color::DarkGray)),
Span::styled(entry.tags.clone(), Style::default().fg(Color::Cyan)),
]));
}
lines.push(Line::from(""));
}
let diff = state
.history_diff
.clone()
.unwrap_or_else(|| "No history diff available".to_string());
lines.extend(color_preview(diff, PreviewKind::Diff).lines);
Paragraph::new(Text::from(lines))
.scroll((state.diff_scroll, 0))
.block(
Block::default()
.borders(Borders::ALL)
.title("File history details"),
)
.wrap(Wrap { trim: false })
}
Tab::Timeline => {
let mut lines = Vec::new();
if let Some(repo) = &state.repo {
lines.push(Line::from(vec![
Span::styled("entries ", Style::default().fg(Color::DarkGray)),
Span::styled(
repo.timeline.len().to_string(),
Style::default().fg(Color::White),
),
]));
lines.push(Line::from(""));
if let Some(entry) = repo.timeline.get(state.timeline_selected) {
lines.push(Line::from(vec![
Span::styled("commit ", Style::default().fg(Color::DarkGray)),
Span::styled(entry.rid.clone(), Style::default().fg(Color::Yellow)),
]));
lines.push(Line::from(vec![
Span::styled("author ", Style::default().fg(Color::DarkGray)),
Span::raw(entry.user.clone()),
Span::raw(" "),
Span::styled(entry.date.clone(), Style::default().fg(Color::DarkGray)),
]));
lines.push(Line::from(vec![
Span::styled("message ", Style::default().fg(Color::DarkGray)),
Span::raw(entry.message.clone()),
]));
lines.push(Line::from(""));
}
}
let diff = state
.timeline_diff
.clone()
.unwrap_or_else(|| "No timeline diff available".to_string());
lines.extend(color_preview(diff, PreviewKind::Diff).lines);
Paragraph::new(Text::from(lines))
.scroll((state.diff_scroll, 0))
.block(
Block::default()
.borders(Borders::ALL)
.title("Timeline details"),
)
.wrap(Wrap { trim: false })
}
}
} else {
Paragraph::new(
state
.error
.clone()
.unwrap_or_else(|| "Open a Fossil checkout to begin".to_string()),
)
.block(Block::default().borders(Borders::ALL).title("Status"))
};
frame.render_stateful_widget(left, body[0], &mut file_state);
match state.tab {
Tab::WorkingTree => state.files_scroll = file_state.offset(),
Tab::FileHistory => state.history_scroll = file_state.offset(),
Tab::Timeline => state.timeline_scroll = file_state.offset(),
}
frame.render_widget(right, body[1]);
let footer = if let Some(msg) = &state.commit_prompt {
let target = match state.commit_target {
CommitTarget::Selected => "selected",
CommitTarget::Current => "current",
};
let text = commit_prompt_text(target, msg);
cursor = Some((
areas[2].x + 1 + 7 + target.len() as u16 + 2 + msg.chars().count() as u16,
areas[2].y + 1,
));
Paragraph::new(text).block(Block::default().borders(Borders::ALL).title("Commit"))
} else if let Some(path) = &state.ignore_prompt {
let text = confirmation_prompt("ignore ", path, "?");
cursor = Some((
areas[2].x + 1 + 7 + path.chars().count() as u16,
areas[2].y + 1,
));
Paragraph::new(text).block(Block::default().borders(Borders::ALL).title("Ignore"))
} else if let Some(path) = &state.discard_prompt {
let text = confirmation_prompt("discard changes in ", path, "?");
cursor = Some((
areas[2].x + 1 + 19 + path.chars().count() as u16,
areas[2].y + 1,
));
Paragraph::new(text).block(Block::default().borders(Borders::ALL).title("Discard"))
} else if state.repo.is_none() {
let lines = vec![Line::from(vec![
key_span("q", Color::Yellow),
Span::raw(" quit"),
])];
Paragraph::new(Text::from(lines)).block(Block::default().borders(Borders::TOP))
} else {
let sel_count = state.selected_files.len();
let mut lines = vec![Line::from(vec![
key_span("q", Color::Yellow),
Span::raw(" quit "),
key_span("r", Color::Yellow),
Span::raw(" refresh "),
key_span("Space", Color::Yellow),
Span::raw(" select "),
key_span("i", Color::Yellow),
Span::raw(" ignore "),
key_span("c", Color::Yellow),
Span::raw(" commit "),
key_span("a", Color::Yellow),
Span::raw(" all/none "),
key_span("p", Color::Yellow),
Span::raw(" pull "),
key_span("e", Color::Yellow),
Span::raw(" edit "),
key_span("o", Color::Yellow),
Span::raw(" open "),
key_span("d", Color::Yellow),
Span::raw(" discard "),
key_span("H", Color::Yellow),
Span::raw(" hex "),
key_span("Tab", Color::Yellow),
Span::raw(" views "),
Span::styled("mouse", Style::default().fg(Color::DarkGray)),
Span::raw(" select/scroll left pane"),
])];
if state.tab != Tab::Timeline {
if let Some(repo) = &state.repo {
if let Some(f) = repo.files.get(repo.selected_file) {
lines.push(Line::from(vec![
Span::styled("selected", Style::default().fg(Color::DarkGray)),
Span::raw(": "),
Span::styled(f.path.clone(), Style::default().fg(Color::Yellow)),
Span::raw(" ["),
Span::styled(f.status.clone(), Style::default().fg(Color::Cyan)),
Span::raw("]"),
]));
}
}
}
if state.tab == Tab::WorkingTree {
lines.push(Line::from(vec![
Span::styled("selected files", Style::default().fg(Color::DarkGray)),
Span::raw(": "),
Span::styled(sel_count.to_string(), Style::default().fg(Color::White)),
]));
}
Paragraph::new(Text::from(lines))
.block(Block::default().borders(Borders::TOP).title("Shortcuts"))
};
frame.render_widget(footer, areas[2]);
if let Some(error) = &state.error {
if state.repo.is_some() {
let popup_area = centered_rect(60, 20, frame.area());
let mut lines = error
.lines()
.map(|line| Line::from(styled_message_line(line)))
.collect::<Vec<_>>();
lines.push(Line::from(Span::styled(
"Press Esc to dismiss",
Style::default().fg(Color::DarkGray),
)));
let popup = Paragraph::new(Text::from(lines))
.block(Block::default().borders(Borders::ALL).title("Warning"))
.wrap(Wrap { trim: true });
frame.render_widget(Clear, popup_area);
frame.render_widget(popup, popup_area);
}
}
if state.repo.is_none() {
let popup_area = centered_rect(72, 42, frame.area());
let popup = Paragraph::new(Text::from(info_box_lines()))
.block(
Block::default()
.borders(Borders::ALL)
.title("Not a Fossil checkout"),
)
.wrap(Wrap { trim: true });
frame.render_widget(Clear, popup_area);
frame.render_widget(popup, popup_area);
}
if let Some((x, y)) = cursor {
frame.set_cursor_position((x, y));
}
}
fn centered_rect(percent_x: u16, percent_y: u16, r: Rect) -> Rect {
let popup_layout = Layout::default()
.direction(Direction::Vertical)
.constraints([
Constraint::Percentage((100 - percent_y) / 2),
Constraint::Percentage(percent_y),
Constraint::Percentage((100 - percent_y) / 2),
])
.split(r);
Layout::default()
.direction(Direction::Horizontal)
.constraints([
Constraint::Percentage((100 - percent_x) / 2),
Constraint::Percentage(percent_x),
Constraint::Percentage((100 - percent_x) / 2),
])
.split(popup_layout[1])[1]
}
fn commit_prompt_text(target: &str, msg: &str) -> Text<'static> {
Text::from(vec![
Line::from(vec![
Span::raw("commit "),
key_span(target, Color::Yellow),
Span::raw(": "),
Span::styled(
msg.to_string(),
Style::default().bg(Color::DarkGray).fg(Color::White),
),
]),
confirmation_hint_line(),
])
}
fn confirmation_prompt(prefix: &str, value: &str, suffix: &str) -> Text<'static> {
Text::from(vec![
Line::from(vec![
Span::raw(prefix.to_string()),
Span::styled(
value.to_string(),
Style::default().bg(Color::DarkGray).fg(Color::White),
),
Span::raw(suffix.to_string()),
]),
confirmation_hint_line(),
])
}
fn confirmation_hint_line() -> Line<'static> {
Line::from(vec![
key_span("Esc", Color::Red),
Span::raw(" cancel · "),
key_span("Enter", Color::Green),
Span::raw(" confirm"),
])
}
fn key_span(label: &str, color: Color) -> Span<'static> {
Span::styled(
label.to_string(),
Style::default().fg(color).add_modifier(Modifier::BOLD),
)
}
fn styled_message_line(line: &str) -> Vec<Span<'static>> {
let mut spans = Vec::new();
let mut rest = line;
while let Some(start) = rest.find("[[") {
let (before, after_start) = rest.split_at(start);
if !before.is_empty() {
spans.push(Span::raw(before.to_string()));
}
let inner = &after_start[2..];
if let Some(end) = inner.find("]]") {
let value = &inner[..end];
spans.push(Span::styled(
value.to_string(),
Style::default()
.fg(Color::Yellow)
.add_modifier(Modifier::BOLD),
));
rest = &inner[end + 2..];
} else {
spans.push(Span::raw(after_start.to_string()));
rest = "";
break;
}
}
if !rest.is_empty() {
spans.push(Span::raw(rest.to_string()));
}
if spans.is_empty() {
vec![Span::raw(line.to_string())]
} else {
spans
}
}
fn info_box_lines() -> Vec<Line<'static>> {
vec![
Line::from(vec![Span::styled(
"lazyfossil could not find a Fossil checkout in this directory.",
Style::default()
.fg(Color::White)
.add_modifier(Modifier::BOLD),
)]),
Line::from(""),
Line::from(vec![Span::styled(
"What you can do:",
Style::default()
.fg(Color::Yellow)
.add_modifier(Modifier::BOLD),
)]),
Line::from(" • move into a Fossil checkout and restart"),
Line::from(" • run `fossil open <repo>` or `fossil checkout <uuid>`"),
Line::from(" • press q to quit"),
Line::from(""),
Line::from(vec![Span::styled(
"Repository actions are disabled until a checkout is detected.",
Style::default().fg(Color::DarkGray),
)]),
]
}
fn preview_title(kind: PreviewKind) -> &'static str {
match kind {
PreviewKind::Diff => "Diff",
PreviewKind::Plain => "Plain preview",
PreviewKind::Markdown => "Markdown preview",
PreviewKind::Hex => "Hex preview",
PreviewKind::Notice => "Preview",
}
}
fn color_preview(diff: String, kind: PreviewKind) -> Text<'static> {
Text::from(
diff.lines()
.map(|line| {
if line.starts_with("Press [o] to open externally or [H] for hex view") {
return Line::from(vec![
Span::raw("Press "),
key_span("o", Color::Yellow),
Span::raw(" to open externally or "),
key_span("H", Color::Yellow),
Span::raw(" for hex view"),
]);
}
let style = match kind {
PreviewKind::Diff => {
if line.starts_with("Preview unavailable for ") {
Style::default()
.fg(Color::Yellow)
.add_modifier(Modifier::BOLD)
} else if line.starts_with("+++") || line.starts_with("---") {
Style::default().fg(Color::Blue)
} else if line.starts_with("@@") {
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::BOLD)
} else if line.starts_with('+') {
Style::default().fg(Color::Green)
} else if line.starts_with('-') {
Style::default().fg(Color::Red)
} else {
Style::default().fg(Color::Reset)
}
}
PreviewKind::Markdown => {
if line.starts_with('#') {
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::BOLD)
} else if line.starts_with("- ") || line.starts_with("* ") {
Style::default().fg(Color::Yellow)
} else if line.starts_with('>') {
Style::default().fg(Color::DarkGray)
} else {
Style::default().fg(Color::Reset)
}
}
PreviewKind::Plain | PreviewKind::Hex => Style::default().fg(Color::Reset),
PreviewKind::Notice => {
if line.starts_with("Preview unavailable for ")
|| line.starts_with("Missing file ")
|| line.starts_with("Conflict detected for ")
{
Style::default()
.fg(Color::Yellow)
.add_modifier(Modifier::BOLD)
} else if line.starts_with("Possible rename detected:") {
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::BOLD)
} else {
Style::default().fg(Color::Reset)
}
}
};
Line::from(Span::styled(line.to_string(), style))
})
.collect::<Vec<_>>(),
)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn confirmation_prompt_contains_hint_line() {
let text = confirmation_prompt("ignore ", "tracked.txt", "?");
let lines = text.lines.into_iter().collect::<Vec<_>>();
assert_eq!(lines.len(), 2);
assert_eq!(lines[0].spans[1].content, "tracked.txt");
assert_eq!(lines[1].spans[0].content, "Esc");
assert_eq!(lines[1].spans[2].content, "Enter");
}
#[test]
fn styled_message_line_highlights_markers() {
let spans = styled_message_line("File [[path/to/file]] renamed");
assert!(spans
.iter()
.any(|span| span.content.as_ref() == "path/to/file"));
assert!(spans.len() >= 3);
}
#[test]
fn key_span_uses_expected_label() {
let span = key_span("Esc", Color::Red);
assert_eq!(span.content, "Esc");
}
#[test]
fn info_box_mentions_checkout_actions() {
let lines = info_box_lines();
assert!(lines
.iter()
.any(|line| line.to_string().contains("not find a Fossil checkout")));
assert!(lines
.iter()
.any(|line| line.to_string().contains("press q to quit")));
}
#[test]
fn commit_prompt_text_uses_selected_target_and_message() {
let text = commit_prompt_text("selected", "Fix bug");
let lines = text.lines.into_iter().collect::<Vec<_>>();
assert_eq!(lines.len(), 2);
assert_eq!(lines[0].spans[1].content, "selected");
assert_eq!(lines[0].spans[3].content, "Fix bug");
}
#[test]
fn footer_omits_selected_files_in_non_working_tree_tabs() {
let mut state = AppState {
tab: Tab::FileHistory,
repo: None,
error: None,
diff: None,
diff_scroll: 0,
selected_files: vec!["a.txt".to_string()],
commit_prompt: None,
commit_target: CommitTarget::Selected,
ignore_prompt: None,
discard_prompt: None,
history: vec![],
history_diff: None,
timeline_diff: None,
redraw: false,
show_hex: false,
history_selected: 0,
timeline_selected: 0,
files_scroll: 0,
history_scroll: 0,
timeline_scroll: 0,
preview_kind: PreviewKind::Diff,
};
let footer = if state.tab == Tab::WorkingTree {
let sel_count = state.selected_files.len();
let mut lines = vec![Line::from(vec![Span::raw("q")])];
lines.push(Line::from(vec![
Span::styled("selected files", Style::default().fg(Color::DarkGray)),
Span::raw(": "),
Span::styled(sel_count.to_string(), Style::default().fg(Color::White)),
]));
Text::from(lines)
} else {
Text::from(vec![Line::from(vec![Span::raw("q")])])
};
assert!(!footer.to_string().contains("selected files"));
state.tab = Tab::Timeline;
let footer = if state.tab == Tab::WorkingTree {
Text::from(vec![Line::from(vec![Span::raw("selected files")])])
} else {
Text::from(vec![Line::from(vec![Span::raw("q")])])
};
assert!(!footer.to_string().contains("selected files"));
}
#[test]
fn preview_titles_match_context() {
assert_eq!(preview_title(PreviewKind::Diff), "Diff");
assert_eq!(preview_title(PreviewKind::Plain), "Plain preview");
assert_eq!(preview_title(PreviewKind::Markdown), "Markdown preview");
assert_eq!(preview_title(PreviewKind::Hex), "Hex preview");
assert_eq!(preview_title(PreviewKind::Notice), "Preview");
}
#[test]
fn commit_prompt_helper_formats_message() {
let text = commit_prompt_text("selected", "Ship it");
assert!(text.to_string().contains("commit selected: Ship it"));
}
#[test]
fn footer_mentions_mouse_hints() {
let state = AppState {
tab: Tab::WorkingTree,
repo: None,
error: None,
diff: None,
diff_scroll: 0,
selected_files: vec![],
commit_prompt: None,
commit_target: CommitTarget::Selected,
ignore_prompt: None,
discard_prompt: None,
history: vec![],
history_diff: None,
timeline_diff: None,
redraw: false,
show_hex: false,
history_selected: 0,
timeline_selected: 0,
files_scroll: 0,
history_scroll: 0,
timeline_scroll: 0,
preview_kind: PreviewKind::Diff,
};
let footer_text = {
let sel_count = state.selected_files.len();
let mut lines = vec![Line::from(vec![Span::raw("q")])];
lines.push(Line::from(vec![
Span::styled("selected files", Style::default().fg(Color::DarkGray)),
Span::raw(": "),
Span::styled(sel_count.to_string(), Style::default().fg(Color::White)),
]));
lines.push(Line::from(vec![
Span::styled("mouse", Style::default().fg(Color::DarkGray)),
Span::raw(" select/scroll"),
]));
Text::from(lines)
};
assert!(footer_text.to_string().contains("mouse select/scroll"));
}
}