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composer.go
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composer.go
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package svgparser
import (
"encoding/xml"
"fmt"
"io"
"strings"
)
// Compose convert SVG from element
func (e *Element) Compose(w io.Writer) error {
enc := xml.NewEncoder(w)
err := EncodeXML(e, enc, []string{})
if err != nil {
return err
}
return nil
}
func (e *Element) ComposeExcludes(w io.Writer, uuids []string) error {
enc := xml.NewEncoder(w)
err := EncodeXML(e, enc, uuids)
if err != nil {
return err
}
return nil
}
// EncodeXML encode XML elements recursively
func EncodeXML(r *Element, e *xml.Encoder, excludes []string) (err error) {
for _, uuid := range excludes {
if r.UUID == uuid {
return nil
}
}
if val, ok := r.Attributes["xlink:href"]; ok {
r.Attributes["xlink:href"] = strings.Replace(val, "\n", "", -1)
}
start := r.XMLElement()
err = e.EncodeToken(start)
if err != nil {
return fmt.Errorf("failed to encode start element: %v", err)
}
for _, c := range r.Children {
EncodeXML(c, e, excludes)
}
err = e.EncodeToken(xml.EndElement{start.Name})
if err != nil {
return fmt.Errorf("failed to encode end element: %v", err)
}
err = e.Flush()
if err != nil {
return fmt.Errorf("failed to flush encoder: %v", err)
}
return nil
}