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|
package formatter
import (
"fmt"
"unicode"
"git.thomasvoss.com/gsp/parser"
)
var (
attrValueEscapes = map[rune]string{
'"': """,
'&': "&",
'<': "<",
}
stringEscapes = map[rune]string{
'"': """,
'&': "&",
'<': "<",
'>': ">",
'\'': "'",
}
)
func PrintAst(ast parser.AstNode) {
switch ast.Type {
case parser.Text:
printText(ast.Text)
case parser.Normal:
if ast.Text == "/" {
return
}
fmt.Printf("<%s", ast.Text)
printAttrs(ast.Attrs)
fmt.Print(">")
if len(ast.Children) > 0 {
printChildren(ast.Children)
fmt.Printf("</%s>", ast.Text)
}
case parser.Tagless:
printChildren(ast.Children)
case parser.TaglessTrim:
printChildrenTrim(ast.Children)
}
}
func printAttrs(attrs []parser.Attr) {
classes := make([]parser.Attr, 0, cap(attrs))
nClasses := make([]parser.Attr, 0, cap(attrs))
for _, a := range attrs {
if a.Key == "class" {
classes = append(classes, a)
} else {
nClasses = append(nClasses, a)
}
}
if len(classes) > 0 {
fmt.Print(" class=\"")
for i, a := range classes {
printAttrVal(a.Value)
if i != len(classes)-1 {
fmt.Print(" ")
} else {
fmt.Print("\"")
}
}
}
for _, a := range nClasses {
fmt.Printf(" %s", a.Key)
if a.Value != "" {
fmt.Print("=\"")
printAttrVal(a.Value)
fmt.Print("\"")
}
}
}
func printAttrVal(s string) {
for _, r := range s {
if v, ok := attrValueEscapes[r]; ok {
fmt.Print(v)
} else {
fmt.Printf("%c", r)
}
}
}
func printText(s string) {
for _, r := range s {
if v, ok := stringEscapes[r]; ok {
fmt.Print(v)
} else {
fmt.Printf("%c", r)
}
}
}
func printChildren(nodes []parser.AstNode) {
for _, n := range nodes {
PrintAst(n)
}
}
func printChildrenTrim(nodes []parser.AstNode) {
for i, n := range nodes {
if i == 0 && n.Type == parser.Text {
n.Text = trimLeftSpaces(n.Text)
}
if i == len(nodes)-1 && n.Type == parser.Text {
n.Text = trimRightSpaces(n.Text)
}
PrintAst(n)
}
}
func trimLeftSpaces(s string) string {
i := 0
rs := []rune(s)
for i < len(s) && unicode.IsSpace(rs[i]) {
i++
}
return string(rs[i:])
}
func trimRightSpaces(s string) string {
rs := []rune(s)
i := len(rs) - 1
for i >= 0 && unicode.IsSpace(rs[i]) {
i--
}
return string(rs[:i+1])
}
|
