vendor tsgo

tools/tsgo/internal/printer/singlelinestringwriter.go

@@ -0,0 +1,159 @@
+package printer
+
+import (
+	"strings"
+	"sync"
+	"unicode/utf8"
+
+	"github.com/microsoft/typescript-go/internal/ast"
+	"github.com/microsoft/typescript-go/internal/core"
+	"github.com/microsoft/typescript-go/internal/stringutil"
+)
+
+var singleLineStringWriterPool sync.Pool = sync.Pool{
+	New: func() any {
+		return &singleLineStringWriter{}
+	},
+}
+
+var _ EmitTextWriter = &singleLineStringWriter{}
+
+func GetSingleLineStringWriter() (EmitTextWriter, func()) {
+	w := singleLineStringWriterPool.Get().(*singleLineStringWriter)
+	w.Clear()
+	return w, func() {
+		singleLineStringWriterPool.Put(w)
+	}
+}
+
+type singleLineStringWriter struct {
+	builder     strings.Builder
+	lastWritten string
+}
+
+func (w *singleLineStringWriter) Clear() {
+	w.lastWritten = ""
+	w.builder.Reset()
+}
+
+func (w singleLineStringWriter) DecreaseIndent() {
+	// Do Nothing
+}
+
+func (w singleLineStringWriter) GetColumn() core.UTF16Offset {
+	return 0
+}
+
+func (w singleLineStringWriter) GetIndent() int {
+	return 0
+}
+
+func (w singleLineStringWriter) GetLine() int {
+	return 0
+}
+
+func (w singleLineStringWriter) String() string {
+	return w.builder.String()
+}
+
+func (w singleLineStringWriter) GetTextPos() int {
+	return w.builder.Len()
+}
+
+func (w singleLineStringWriter) HasTrailingComment() bool {
+	return false
+}
+
+func (w singleLineStringWriter) HasTrailingWhitespace() bool {
+	if w.builder.Len() == 0 {
+		return false
+	}
+	ch, _ := utf8.DecodeLastRuneInString(w.lastWritten)
+	if ch == utf8.RuneError {
+		return false
+	}
+	return stringutil.IsWhiteSpaceLike(ch)
+}
+
+func (w singleLineStringWriter) IncreaseIndent() {
+	// Do Nothing
+}
+
+func (w singleLineStringWriter) IsAtStartOfLine() bool {
+	return false
+}
+
+func (w *singleLineStringWriter) RawWrite(s string) {
+	w.lastWritten = s
+	w.builder.WriteString(s)
+}
+
+func (w *singleLineStringWriter) Write(s string) {
+	w.lastWritten = s
+	w.builder.WriteString(s)
+}
+
+func (w *singleLineStringWriter) WriteComment(text string) {
+	w.lastWritten = text
+	w.builder.WriteString(text)
+}
+
+func (w *singleLineStringWriter) WriteKeyword(text string) {
+	w.lastWritten = text
+	w.builder.WriteString(text)
+}
+
+func (w *singleLineStringWriter) WriteLine() {
+	w.lastWritten = " "
+	w.builder.WriteString(" ")
+}
+
+func (w *singleLineStringWriter) WriteLineForce(force bool) {
+	w.lastWritten = " "
+	w.builder.WriteString(" ")
+}
+
+func (w *singleLineStringWriter) WriteLiteral(s string) {
+	w.lastWritten = s
+	w.builder.WriteString(s)
+}
+
+func (w *singleLineStringWriter) WriteOperator(text string) {
+	w.lastWritten = text
+	w.builder.WriteString(text)
+}
+
+func (w *singleLineStringWriter) WriteParameter(text string) {
+	w.lastWritten = text
+	w.builder.WriteString(text)
+}
+
+func (w *singleLineStringWriter) WriteProperty(text string) {
+	w.lastWritten = text
+	w.builder.WriteString(text)
+}
+
+func (w *singleLineStringWriter) WritePunctuation(text string) {
+	w.lastWritten = text
+	w.builder.WriteString(text)
+}
+
+func (w *singleLineStringWriter) WriteSpace(text string) {
+	w.lastWritten = text
+	w.builder.WriteString(text)
+}
+
+func (w *singleLineStringWriter) WriteStringLiteral(text string) {
+	w.lastWritten = text
+	w.builder.WriteString(text)
+}
+
+func (w *singleLineStringWriter) WriteSymbol(text string, symbol *ast.Symbol) {
+	w.lastWritten = text
+	w.builder.WriteString(text)
+}
+
+func (w *singleLineStringWriter) WriteTrailingSemicolon(text string) {
+	w.lastWritten = text
+	w.builder.WriteString(text)
+}