Every workspace split into real panes: 19 panes across 7 workspaces, one program per panel

tui/frame.go

@@ -289,3 +289,28 @@ func helpOverlay(title string, entries [][2]string, w, h int) string {
 	p := panel{title: title, width: boxW, height: boxH, focused: true}
 	return lipgloss.Place(w, h, lipgloss.Center, lipgloss.Center, p.render(lines))
 }
+
+// singlePanel draws one panel filling the whole pane: a title, optional tabs,
+// a scrolling body, and one line of keys. It is what a pane shows when a
+// workspace has been split into real panes instead of one program drawing
+// several panels inside itself.
+func singlePanel(title string, tabs []string, active int, body []string, w, h int, footer string, scroll int) string {
+	if w < 12 || h < 4 {
+		return fmt.Sprintf("this pane is %d × %d; it needs 12 × 4", w, h)
+	}
+	p := panel{title: title, tabs: tabs, active: active, width: w, height: h - 1, focused: true}
+	visible := p.bodyHeight()
+	maxScroll := max(0, len(body)-visible)
+	if scroll > maxScroll {
+		scroll = maxScroll
+	}
+	if scroll < 0 {
+		scroll = 0
+	}
+	from := scroll
+	to := min(len(body), from+visible)
+	if to < from {
+		to = from
+	}
+	return p.render(body[from:to]) + "\n" + truncateVisible(footer, w)
+}