Document meanings of status colours

[tomviner]

I can see from

trippy/src/frontend/render/table.rs

Lines 212 to 219 in a3e53be

	fn render_status_cell(hop: &Hop, is_target: bool) -> Cell<'static> {
	let lost = hop.total_sent() - hop.total_recv();
	Cell::from(match (lost, is_target) {
	(lost, target) if target && lost == hop.total_sent() => "🔴",
	(lost, target) if target && lost > 0 => "🟡",
	(lost, target) if !target && lost == hop.total_sent() => "🟤",
	(lost, target) if !target && lost > 0 => "🔵",
	_ => "🟢",

the names of the conditions needed for each status colour.

The "is target" condition is explained here

trippy/src/backend/trace.rs

Lines 47 to 52 in a3e53be

	/// Is a given `Hop` the target hop for a given flow?
	///
	/// A `Hop` is considered to be the target if it has the highest `ttl` value observed.
	///
	/// Note that if the target host does not respond to probes then the the highest `ttl` observed
	/// will be one greater than the `ttl` of the last host which did respond.

Would be nice to add a short section to the docs explaining these colours.

[fujiapple852]

Hi @tomviner,

Yes I agree this should be documented. Maybe also shown in the help dialog box of the TUI?

For background; The above was only every intended as a placeholder until some more comprehensive status logic could be written, but alas I haven't attempted that yet. This came up recently as part of a HN discussion and I created #860 on the back of that discussion to explore ideas.

[c-git]

That's how life goes, don't stress. There's only 24 hours in each day.

[fujiapple852]

@tomviner I have documented all Tui columns, including the status column:

https://github.com/fujiapple852/trippy?tab=readme-ov-file#column-reference

WDYT?