🎉 Initial commit

animation/path.go

@@ -0,0 +1,62 @@
+package animation
+
+import (
+	"fmt"
+	"strings"
+)
+
+// PathAnimation 路径动画
+type PathAnimation struct {
+	BaseAnimation
+	Path   string // SVG路径数据
+	Rotate string // 是否旋转元素以跟随路径方向 ("auto", "auto-reverse", 或 "0")
+}
+
+// NewPathAnimation 创建一个路径动画
+func NewPathAnimation(targetID string, path string, duration float64, repeatCount int) *PathAnimation {
+	return &PathAnimation{
+		BaseAnimation: BaseAnimation{
+			Type:        Path, // 路径动画类型
+			Duration:    duration,
+			RepeatCount: repeatCount,
+			Delay:       0,
+			TargetID:    targetID,
+			Attributes:  make(map[string]string),
+		},
+		Path:   path,
+		Rotate: "0", // 默认不旋转
+	}
+}
+
+// WithRotate 设置是否旋转元素以跟随路径方向
+func (a *PathAnimation) WithRotate(rotate string) *PathAnimation {
+	a.Rotate = rotate
+	return a
+}
+
+// GenerateSVG 生成路径动画的SVG代码
+func (a *PathAnimation) GenerateSVG() string {
+	var sb strings.Builder
+
+	// 创建一个animateMotion元素
+	sb.WriteString(fmt.Sprintf("<animateMotion href=\"#%s\" ", a.TargetID))
+	sb.WriteString(fmt.Sprintf("path=\"%s\" ", a.Path))
+	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))
+	}
+
+	// 设置旋转属性
+	sb.WriteString(fmt.Sprintf("rotate=\"%s\" ", a.Rotate))
+
+	sb.WriteString("/>\n")
+
+	return sb.String()
+}