wip chat sessions

thinking_indicator.go

@@ -0,0 +1,55 @@
+package mujica
+
+import (
+	"math"
+
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/internal"
+	"mujicaui/theme"
+)
+
+// ThinkingIndicatorOptions configure a ThinkingIndicator.
+type ThinkingIndicatorOptions struct {
+	// Phase is the caller's stage text, such as "Searching the web"; empty uses "Thinking".
+	Phase string
+}
+
+// ThinkingIndicator shows the assistant is working: three diamonds rising in turn and the phase; still under reduced motion.
+func ThinkingIndicator(c *ui.Context, opts ThinkingIndicatorOptions) *ui.Element {
+	k := Tokens(c)
+	d := Density(c)
+	phase := opts.Phase
+	if phase == "" {
+		phase = msg(c, "thinking_indicator.thinking")
+	}
+	still := c.Preferences().ReduceMotion
+	row := ui.Row(c).Gap(d.Unit() * 2).AlignItems(ui.Center).MinHeight(d.ControlHeight()).Role(ui.RoleStatus).Label(phase)
+	row.Children(func() {
+		ui.Box(c).Size(30, 14).Shrink(0).Draw(func(p *ui.Painter, r ui.Rect) {
+			t := 0.0
+			if !still {
+				t = float64(p.Now().UnixMilli()%1200) / 1200
+				p.AnimationFrame()
+			}
+			for i := range 3 {
+				lift := float32(0)
+				alpha := float32(1)
+				if !still {
+					phase := math.Mod(t-float64(i)*0.18+1, 1)
+					wave := float32(math.Max(0, math.Sin(phase*2*math.Pi)))
+					lift, alpha = wave*3, 0.45+0.55*wave
+				}
+				x := internal.Snap(p, r.X+5+float32(i)*10)
+				y := internal.Snap(p, r.Y+r.H/2-lift)
+				p.FillPath(internal.Diamond(x, y, 7), k.AccentText.Alpha(alpha))
+			}
+		})
+		text := phase
+		if still {
+			text += "…"
+		}
+		ui.Text(c, text).FontSize(FontSize(c, theme.BodySize)).TextColor(k.TextMuted).Italic()
+	})
+	return row
+}