74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
package animation
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// GradientAnimation 渐变动画
|
|
type GradientAnimation struct {
|
|
BaseAnimation
|
|
Colors []string // 渐变颜色列表
|
|
Animate bool // 是否添加动画效果
|
|
}
|
|
|
|
// NewGradientAnimation 创建一个渐变动画
|
|
func NewGradientAnimation(targetID string, colors []string, duration float64, repeatCount int, animate bool) *GradientAnimation {
|
|
return &GradientAnimation{
|
|
BaseAnimation: BaseAnimation{
|
|
Type: Gradient,
|
|
Duration: duration,
|
|
RepeatCount: repeatCount,
|
|
Delay: 0,
|
|
TargetID: targetID,
|
|
Attributes: make(map[string]string),
|
|
},
|
|
Colors: colors,
|
|
Animate: animate,
|
|
}
|
|
}
|
|
|
|
// GenerateSVG 生成渐变动画的SVG代码
|
|
func (a *GradientAnimation) GenerateSVG() string {
|
|
var sb strings.Builder
|
|
|
|
// 创建渐变定义
|
|
gradientID := fmt.Sprintf("%s-gradient", a.TargetID)
|
|
sb.WriteString(fmt.Sprintf("<linearGradient id=\"%s\" x1=\"0%%\" y1=\"0%%\" x2=\"100%%\" y2=\"0%%\">\n", gradientID))
|
|
|
|
// 添加渐变颜色
|
|
for i, color := range a.Colors {
|
|
offset := float64(i) / float64(len(a.Colors)-1) * 100
|
|
sb.WriteString(fmt.Sprintf(" <stop offset=\"%g%%\" stop-color=\"%s\" />\n", offset, color))
|
|
}
|
|
sb.WriteString("</linearGradient>\n")
|
|
|
|
// 为目标元素添加样式引用
|
|
sb.WriteString(fmt.Sprintf("<style type=\"text/css\">\n #%s { fill: url(#%s) !important; }\n</style>\n", a.TargetID, gradientID))
|
|
|
|
// 添加动画
|
|
if a.Animate {
|
|
// x1 动画
|
|
sb.WriteString(fmt.Sprintf("<animate href=\"#%s\" attributeName=\"x1\" from=\"0%%\" to=\"100%%\" ", gradientID))
|
|
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))
|
|
}
|
|
sb.WriteString("/>\n")
|
|
|
|
// x2 动画
|
|
sb.WriteString(fmt.Sprintf("<animate href=\"#%s\" attributeName=\"x2\" from=\"100%%\" to=\"200%%\" ", gradientID))
|
|
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))
|
|
}
|
|
sb.WriteString("/>\n")
|
|
}
|
|
|
|
return sb.String()
|
|
}
|