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rangewriter.go
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rangewriter.go
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package generator
import (
"io"
"strconv"
"strings"
"unicode/utf8"
"github.com/a-h/templ/parser/v2"
)
func NewRangeWriter(w io.Writer) *RangeWriter {
return &RangeWriter{
w: w,
literalWriter: prodLiteralWriter{},
}
}
type RangeWriter struct {
Current parser.Position
inLiteral bool
w io.Writer
// Extract strings.
literalWriter literalWriter
}
type literalWriter interface {
writeLiteral(inLiteral bool, s string) string
closeLiteral(indent int) string
literals() string
}
type watchLiteralWriter struct {
index int
builder *strings.Builder
}
func (w *watchLiteralWriter) closeLiteral(indent int) string {
w.index++
w.builder.WriteString("\n")
return ""
}
func (w *watchLiteralWriter) writeLiteral(inLiteral bool, s string) string {
w.builder.WriteString(s)
if inLiteral {
return ""
}
return "templ_7745c5c3_Err = templ.WriteWatchModeString(templ_7745c5c3_Buffer, " + strconv.Itoa(w.index+1) + ")\n"
}
func (w *watchLiteralWriter) literals() string {
return w.builder.String()
}
type prodLiteralWriter struct{}
func (prodLiteralWriter) closeLiteral(indent int) string {
return "\")\n"
}
func (prodLiteralWriter) writeLiteral(inLiteral bool, s string) string {
if inLiteral {
return s
}
return `_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("` + s
}
func (prodLiteralWriter) literals() string {
return ""
}
func (rw *RangeWriter) closeLiteral(indent int) (r parser.Range, err error) {
rw.inLiteral = false
if _, err := rw.write(rw.literalWriter.closeLiteral(indent)); err != nil {
return r, err
}
err = rw.writeErrorHandler(indent)
return
}
func (rw *RangeWriter) WriteIndent(level int, s string) (r parser.Range, err error) {
if rw.inLiteral {
if _, err = rw.closeLiteral(level); err != nil {
return
}
}
_, err = rw.write(strings.Repeat("\t", level))
if err != nil {
return
}
return rw.write(s)
}
func (rw *RangeWriter) WriteStringLiteral(level int, s string) (r parser.Range, err error) {
if !rw.inLiteral {
_, err = rw.write(strings.Repeat("\t", level))
if err != nil {
return
}
}
if _, err := rw.write(rw.literalWriter.writeLiteral(rw.inLiteral, s)); err != nil {
return r, err
}
rw.inLiteral = true
return
}
func (rw *RangeWriter) Write(s string) (r parser.Range, err error) {
if rw.inLiteral {
if _, err = rw.closeLiteral(0); err != nil {
return
}
}
return rw.write(s)
}
func (rw *RangeWriter) write(s string) (r parser.Range, err error) {
r.From = parser.Position{
Index: rw.Current.Index,
Line: rw.Current.Line,
Col: rw.Current.Col,
}
utf8Bytes := make([]byte, 4)
for _, c := range s {
rlen := utf8.EncodeRune(utf8Bytes, c)
rw.Current.Col += uint32(rlen)
if c == '\n' {
rw.Current.Line++
rw.Current.Col = 0
}
_, err = rw.w.Write(utf8Bytes[:rlen])
rw.Current.Index += int64(rlen)
if err != nil {
return r, err
}
}
r.To = rw.Current
return r, err
}
func (rw *RangeWriter) writeErrorHandler(indentLevel int) (err error) {
_, err = rw.WriteIndent(indentLevel, "if templ_7745c5c3_Err != nil {\n")
if err != nil {
return err
}
indentLevel++
_, err = rw.WriteIndent(indentLevel, "return templ_7745c5c3_Err\n")
if err != nil {
return err
}
indentLevel--
_, err = rw.WriteIndent(indentLevel, "}\n")
if err != nil {
return err
}
return err
}