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package formatter
import (
"fmt"
"unicode"
"git.thomasvoss.com/gsp/parser"
)
var xml = false
var stringEscapes = map[rune]string{
'"': """,
'&': "&",
'<': "<",
}
func PrintHtml(ast parser.AstNode) {
if ast.Type == parser.Text {
fmt.Print(ast.Text)
return
}
if ast.Type == parser.DocType || ast.Type == parser.XmlDocType {
if ast.Type == parser.DocType {
fmt.Print("<!DOCTYPE")
} else {
xml = true
fmt.Print("<?xml")
}
for _, a := range ast.Attrs {
printAttr(a)
}
if ast.Type == parser.XmlDocType {
fmt.Print("?")
}
fmt.Print(">")
}
if ast.Type == parser.Normal {
fmt.Printf("<%s", ast.Text)
// Classes are grouped together with ‘class="…"’, so we need
// special handling.
classes := []string{}
notClasses := []parser.Attr{}
for _, a := range ast.Attrs {
if a.Key == "class" {
classes = append(classes, a.Value)
} else {
notClasses = append(notClasses, a)
}
}
if len(classes) > 0 {
fmt.Printf(" class=\"%s", classes[0])
for _, c := range classes[1:] {
fmt.Printf(" %s", c)
}
fmt.Print("\"")
}
for _, a := range notClasses {
printAttr(a)
}
if xml && len(ast.Children) == 0 {
fmt.Print("/>")
} else {
fmt.Print(">")
}
}
if len(ast.Children) == 0 {
return
}
for i, n := range ast.Children {
if n.Type == parser.Text {
if i == 0 {
n.Text = trimLeftSpaces(n.Text)
}
if i == len(ast.Children)-1 {
n.Text = trimRightSpaces(n.Text)
}
}
PrintHtml(n)
}
if ast.Type == parser.Normal {
fmt.Printf("</%s>", ast.Text)
}
}
func printAttr(a parser.Attr) {
fmt.Printf(" %s", a.Key)
if a.Value != "" {
fmt.Print("=\"")
for _, r := range a.Value {
if v, ok := stringEscapes[r]; ok {
fmt.Print(v)
} else {
fmt.Printf("%c", r)
}
}
fmt.Print("\"")
}
}
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 {
i := len(s) - 1
rs := []rune(s)
for i >= 0 && unicode.IsSpace(rs[i]) {
i--
}
return string(rs[:i+1])
}
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