Navigation: review r1 fixes

internal/navigation.go

@@ -0,0 +1,19 @@
+package internal
+
+import (
+	"math"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+)
+
+// Ease moves e's background, border and text color fg to their targets over d.
+func Ease(e *ui.Element, d time.Duration, fg ui.Color) *ui.Element {
+	if d > 0 {
+		e.Transition(ui.ElementTransition{Colors: true, Duration: d})
+	}
+	ch := func(key string, v uint8) uint8 {
+		return uint8(math.Round(float64(e.Animate(key, float32(v), d))))
+	}
+	return e.TextColor(ui.Color{R: ch("mujica.fg.r", fg.R), G: ch("mujica.fg.g", fg.G), B: ch("mujica.fg.b", fg.B), A: ch("mujica.fg.a", fg.A)})
+}