🎉 Initial commit

animation/blink.go

@@ -0,0 +1,75 @@
+package animation
+
+import (
+	"fmt"
+	"strings"
+)
+
+// BlinkAnimation 闪烁动画
+type BlinkAnimation struct {
+	BaseAnimation
+	BlinkCount int     // 闪烁次数
+	MinOpacity float64 // 最小透明度
+	MaxOpacity float64 // 最大透明度
+}
+
+// NewBlinkAnimation 创建一个闪烁动画
+func NewBlinkAnimation(targetID string, minOpacity, maxOpacity float64, blinkCount int, duration float64, repeatCount int) *BlinkAnimation {
+	return &BlinkAnimation{
+		BaseAnimation: BaseAnimation{
+			Type:        Blink, // 闪烁动画类型
+			Duration:    duration,
+			RepeatCount: repeatCount,
+			Delay:       0,
+			TargetID:    targetID,
+			Attributes:  make(map[string]string),
+		},
+		BlinkCount: blinkCount,
+		MinOpacity: minOpacity,
+		MaxOpacity: maxOpacity,
+	}
+}
+
+// GenerateSVG 生成闪烁动画的SVG代码
+func (a *BlinkAnimation) GenerateSVG() string {
+	var sb strings.Builder
+
+	// 创建一个animate元素
+	sb.WriteString(fmt.Sprintf("<animate href=\"#%s\" attributeName=\"opacity\" ", a.TargetID))
+
+	// 根据闪烁次数生成关键帧
+	var keyTimes, values []string
+
+	// 计算关键帧
+	for i := 0; i <= a.BlinkCount*2; i++ {
+		// 计算关键帧时间点
+		keyTime := float64(i) / float64(a.BlinkCount*2)
+		keyTimes = append(keyTimes, fmt.Sprintf("%.2f", keyTime))
+
+		// 计算关键帧值，交替使用最大和最小透明度
+		if i%2 == 0 {
+			values = append(values, fmt.Sprintf("%.1f", a.MaxOpacity))
+		} else {
+			values = append(values, fmt.Sprintf("%.1f", a.MinOpacity))
+		}
+	}
+
+	// 添加关键帧属性
+	sb.WriteString(fmt.Sprintf("keyTimes=\"%s\" ", strings.Join(keyTimes, ";")))
+	sb.WriteString(fmt.Sprintf("values=\"%s\" ", strings.Join(values, ";")))
+	sb.WriteString(fmt.Sprintf("dur=\"%gs\" ", a.Duration))
+
+	if a.RepeatCount < 0 {
+		sb.WriteString("repeatCount=\"indefinite\" ")
+	} else if a.RepeatCount > 0 {
+		sb.WriteString(fmt.Sprintf("repeatCount=\"%d\" ", a.RepeatCount))
+	}
+
+	if a.Delay > 0 {
+		sb.WriteString(fmt.Sprintf("begin=\"%gs\" ", a.Delay))
+	}
+
+	sb.WriteString("/>\n")
+
+	return sb.String()
+}