Sanitized chart sizing logic

internal/tui/tui.go

@@ -71,14 +71,13 @@ func (m Model) content() string {
 					blockStyle.Render(headerStyle.Render(address.Address)))
 			}
 
-			// Linechart // TODO(complexity): too many if branches
+			// Linechart
+			viewportHeight := m.viewport.Height - 4
 			var slc streamlinechart.Model
-			if m.ChartHeight == 0 {
-				if len(m.Addresses) > 1 {
-					slc = streamlinechart.New(m.width, m.viewport.Height-9)
-				} else {
-					slc = streamlinechart.New(m.width, m.viewport.Height-4)
-				}
+			if m.ChartHeight == 0 && len(m.Addresses) == 1 {
+				slc = streamlinechart.New(m.width, viewportHeight)
+			} else if m.ChartHeight == 0 && len(m.Addresses) > 1 {
+				slc = streamlinechart.New(m.width, viewportHeight-5)
 			} else {
 				slc = streamlinechart.New(m.width, m.ChartHeight)
 			}