/
node_renderer.go
112 lines (102 loc) · 2.2 KB
/
node_renderer.go
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package gox
import (
"fmt"
"slices"
"strings"
"sync"
)
type nodeRenderer struct {
node
}
const (
openBracket = "{"
closeBracket = "}"
)
func (n nodeRenderer) render() string {
switch n.nodeType {
case nodeFragment:
var result string
if len(n.attributes) > 0 {
result += n.renderAttributes()
}
if len(n.children) > 0 {
result += n.renderChildren()
}
return result
case nodeText:
return n.renderText()
default:
return n.renderElement()
}
}
func (n nodeRenderer) renderElement() string {
result := "<" + n.name
isVoid := slices.Contains(voidElements, n.name)
if len(n.attributes) > 0 {
result += " " + n.renderAttributes()
}
if isVoid {
result += " />"
}
if !isVoid {
result += ">"
if len(n.children) > 0 {
result += n.renderChildren()
}
result += "</" + n.name + ">"
}
return result
}
func (n nodeRenderer) renderAttribute() string {
if n.value == nil {
return n.name
}
value := fmt.Sprintf("%v", n.value)
if strings.HasPrefix(value, openBracket) && strings.HasSuffix(value, closeBracket) {
return fmt.Sprintf(`%s='%s'`, n.name, value)
}
return fmt.Sprintf(`%s="%s"`, n.name, value)
}
func (n nodeRenderer) renderAttributes() string {
size := len(n.attributes)
var wg sync.WaitGroup
wg.Add(size)
result := make([]string, len(n.attributes))
for i, a := range n.attributes {
go func(i int, a node) {
defer wg.Done()
result[i] = nodeRenderer{a}.renderAttribute()
}(i, a)
}
wg.Wait()
return strings.Join(result, " ")
}
func (n nodeRenderer) renderChildren() string {
size := len(n.children)
var wg sync.WaitGroup
wg.Add(size)
result := make([]string, size)
for i, ch := range n.children {
go func(i int, ch node) {
defer wg.Done()
switch ch.nodeType {
case nodeRaw:
result[i] = nodeRenderer{ch}.renderRaw()
case nodeElement:
result[i] = nodeRenderer{ch}.renderElement()
case nodeAttribute:
result[i] = nodeRenderer{ch}.renderAttribute()
case nodeText:
result[i] = nodeRenderer{ch}.renderText()
}
}(i, ch)
}
wg.Wait()
return strings.Join(result, "")
}
func (n nodeRenderer) renderText() string {
return fmt.Sprintf(`%v`, n.value)
}
func (n nodeRenderer) renderRaw() string {
return fmt.Sprintf(`%v`, n.value)
}