[idea] Let tab_bar_right status wrap to its own row instead of hiding when tabs need the space

[tomajask]

idea / problem

I use ui.tab_bar_right for a small macOS status: battery, CPU, memory and network, about 40 columns. The status shares the row with the tabs, so every column it uses is one the tabs lose. With a few tabs open in a narrower window, the tab labels get squeezed. Once fewer than 17 columns are left for tabs, the whole status disappears (tabs.rs:237-255 (

herdr/src/client/shell/tabs.rs

Lines 237 to 255 in 2ecf19a

	fn tab_bar_status_area(snapshot: &ClientShellSnapshot, area: Rect) -> Option<Rect> {
	let width = tab_bar_status_width(snapshot);
	if width == 0 {
	return None;
	}
	let reserved = width.saturating_add(1);
	(area.width.saturating_sub(reserved) >= MIN_TAB_STRIP_WIDTH)
	.then(|| Rect::new(area.right().saturating_sub(width), area.y, width, 1))
	}
	fn tab_bar_content_area(snapshot: &ClientShellSnapshot, area: Rect) -> Rect {
	let reserved = tab_bar_status_area(snapshot, area)
	.map(|status| status.width.saturating_add(1))
	.unwrap_or(0);
	Rect {
	width: area.width.saturating_sub(reserved),
	..area
	}
	}

)). So I end up choosing between readable tab names and the status, and which one I get changes as I resize the window or open tabs.

requested change

An opt-in tab bar setting, for example ui.tab_bar_right_placement:

• inline: today's behaviour, and the default
• own_row: always render the status right-aligned on a second line of the tab bar
• auto: inline when it fits, a second line instead of hiding when it doesn't

This keeps the status part of the tab bar: it follows tab_bar_position, uses the same entries and config, and isn't a separate status bar.

why you want this

#1629 was closed as covered by tab_bar_right, and for content it is covered: the entries work well. What's missing is room for them. #1747 asks for a full-width row for similar reasons. With this setting, the tabs and the status would stop competing for the same columns, at the cost of one extra row for people who opt in.