mirror of
https://github.com/strongdm/comply
synced 2024-11-14 11:54:53 +00:00
114 lines
1.8 KiB
Go
114 lines
1.8 KiB
Go
package vtclean
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type char struct {
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char byte
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vt100 []byte
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}
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func chars(p []byte) []char {
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tmp := make([]char, len(p))
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for i, v := range p {
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tmp[i].char = v
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}
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return tmp
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}
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type lineEdit struct {
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buf []char
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pos, size int
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vt100 []byte
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}
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func newLineEdit(length int) *lineEdit {
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return &lineEdit{buf: make([]char, length)}
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}
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func (l *lineEdit) Vt100(p []byte) {
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l.vt100 = p
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}
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func (l *lineEdit) Move(x int) {
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if x < 0 && l.pos <= -x {
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l.pos = 0
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} else if x > 0 && l.pos+x > l.size {
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l.pos = l.size
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} else {
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l.pos += x
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}
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}
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func (l *lineEdit) MoveAbs(x int) {
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if x < l.size {
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l.pos = x
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}
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}
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func (l *lineEdit) Write(p []byte) {
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c := chars(p)
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if len(c) > 0 {
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c[0].vt100 = l.vt100
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l.vt100 = nil
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}
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if len(l.buf)-l.pos < len(c) {
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l.buf = append(l.buf[:l.pos], c...)
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} else {
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copy(l.buf[l.pos:], c)
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}
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l.pos += len(c)
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if l.pos > l.size {
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l.size = l.pos
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}
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}
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func (l *lineEdit) Insert(p []byte) {
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c := chars(p)
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if len(c) > 0 {
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c[0].vt100 = l.vt100
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l.vt100 = nil
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}
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l.size += len(c)
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c = append(c, l.buf[l.pos:]...)
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l.buf = append(l.buf[:l.pos], c...)
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}
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func (l *lineEdit) Delete(n int) {
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most := l.size - l.pos
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if n > most {
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n = most
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}
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copy(l.buf[l.pos:], l.buf[l.pos+n:])
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l.size -= n
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}
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func (l *lineEdit) Clear() {
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for i := 0; i < len(l.buf); i++ {
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l.buf[i].char = ' '
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}
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}
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func (l *lineEdit) ClearLeft() {
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for i := 0; i < l.pos+1; i++ {
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l.buf[i].char = ' '
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}
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}
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func (l *lineEdit) ClearRight() {
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l.size = l.pos
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}
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func (l *lineEdit) Bytes() []byte {
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length := 0
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buf := l.buf[:l.size]
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for _, v := range buf {
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length += 1 + len(v.vt100)
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}
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tmp := make([]byte, 0, length)
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for _, v := range buf {
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tmp = append(tmp, v.vt100...)
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tmp = append(tmp, v.char)
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}
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return tmp
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}
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func (l *lineEdit) String() string {
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return string(l.Bytes())
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}
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