feat: error bars for lost probes (#1247) - WIP

crates/trippy-tui/src/frontend/render.rs

@@ -13,4 +13,5 @@ pub mod splash;
 pub mod table;
 pub mod tabs;
 pub mod util;
+pub mod widgets;
 pub mod world;

crates/trippy-tui/src/frontend/render/history.rs

@@ -1,17 +1,19 @@
 use crate::frontend::tui_app::TuiApp;
 use ratatui::layout::Rect;
-use ratatui::style::Style;
-use ratatui::widgets::{Block, BorderType, Borders, Sparkline};
+use ratatui::style::{Color, Style};
+use ratatui::widgets::{Block, BorderType, Borders};
 use ratatui::Frame;
 
+use crate::frontend::render::widgets::sparkline::{EmptyBarSymbol, Sparkline};
+
 /// Render the ping history for the final hop which is typically the target.
 pub fn render(f: &mut Frame<'_>, app: &TuiApp, rect: Rect) {
     let selected_hop = app.selected_hop_or_target();
     let data = selected_hop
         .samples()
         .iter()
         .take(rect.width as usize)
-        .map(|s| (s.as_secs_f64() * 1000_f64) as u64)
+        .map(|s| if s.as_secs_f64() > 0_f64 {Some((s.as_secs_f64() * 1000_f64) as u64)} else {None})
         .collect::<Vec<_>>();
     let history = Sparkline::default()
         .block(
@@ -26,11 +28,13 @@ pub fn render(f: &mut Frame<'_>, app: &TuiApp, rect: Rect) {
                 .border_type(BorderType::Rounded)
                 .border_style(Style::default().fg(app.tui_config.theme.border)),
         )
-        .data(&data)
+        .data(data.as_slice())
         .style(
             Style::default()
                 .bg(app.tui_config.theme.bg)
                 .fg(app.tui_config.theme.samples_chart),
-        );
+        )
+        .empty_bar_style(Style::default().fg(Color::Red))
+        .empty_bar_symbol(EmptyBarSymbol::Full);
     f.render_widget(history, rect);
 }

crates/trippy-tui/src/frontend/render/widgets.rs

@@ -0,0 +1,2 @@
+#[allow(dead_code)]
+pub mod sparkline;