mirror of
https://github.com/strongdm/comply
synced 2024-07-05 08:11:48 +00:00
114 lines
1.8 KiB
Go
114 lines
1.8 KiB
Go
package vtclean
|
|
|
|
type char struct {
|
|
char byte
|
|
vt100 []byte
|
|
}
|
|
|
|
func chars(p []byte) []char {
|
|
tmp := make([]char, len(p))
|
|
for i, v := range p {
|
|
tmp[i].char = v
|
|
}
|
|
return tmp
|
|
}
|
|
|
|
type lineEdit struct {
|
|
buf []char
|
|
pos, size int
|
|
vt100 []byte
|
|
}
|
|
|
|
func newLineEdit(length int) *lineEdit {
|
|
return &lineEdit{buf: make([]char, length)}
|
|
}
|
|
|
|
func (l *lineEdit) Vt100(p []byte) {
|
|
l.vt100 = p
|
|
}
|
|
|
|
func (l *lineEdit) Move(x int) {
|
|
if x < 0 && l.pos <= -x {
|
|
l.pos = 0
|
|
} else if x > 0 && l.pos+x > l.size {
|
|
l.pos = l.size
|
|
} else {
|
|
l.pos += x
|
|
}
|
|
}
|
|
|
|
func (l *lineEdit) MoveAbs(x int) {
|
|
if x < l.size {
|
|
l.pos = x
|
|
}
|
|
}
|
|
|
|
func (l *lineEdit) Write(p []byte) {
|
|
c := chars(p)
|
|
if len(c) > 0 {
|
|
c[0].vt100 = l.vt100
|
|
l.vt100 = nil
|
|
}
|
|
if len(l.buf)-l.pos < len(c) {
|
|
l.buf = append(l.buf[:l.pos], c...)
|
|
} else {
|
|
copy(l.buf[l.pos:], c)
|
|
}
|
|
l.pos += len(c)
|
|
if l.pos > l.size {
|
|
l.size = l.pos
|
|
}
|
|
}
|
|
|
|
func (l *lineEdit) Insert(p []byte) {
|
|
c := chars(p)
|
|
if len(c) > 0 {
|
|
c[0].vt100 = l.vt100
|
|
l.vt100 = nil
|
|
}
|
|
l.size += len(c)
|
|
c = append(c, l.buf[l.pos:]...)
|
|
l.buf = append(l.buf[:l.pos], c...)
|
|
}
|
|
|
|
func (l *lineEdit) Delete(n int) {
|
|
most := l.size - l.pos
|
|
if n > most {
|
|
n = most
|
|
}
|
|
copy(l.buf[l.pos:], l.buf[l.pos+n:])
|
|
l.size -= n
|
|
}
|
|
|
|
func (l *lineEdit) Clear() {
|
|
for i := 0; i < len(l.buf); i++ {
|
|
l.buf[i].char = ' '
|
|
}
|
|
}
|
|
func (l *lineEdit) ClearLeft() {
|
|
for i := 0; i < l.pos+1; i++ {
|
|
l.buf[i].char = ' '
|
|
}
|
|
}
|
|
func (l *lineEdit) ClearRight() {
|
|
l.size = l.pos
|
|
}
|
|
|
|
func (l *lineEdit) Bytes() []byte {
|
|
length := 0
|
|
buf := l.buf[:l.size]
|
|
for _, v := range buf {
|
|
length += 1 + len(v.vt100)
|
|
}
|
|
tmp := make([]byte, 0, length)
|
|
for _, v := range buf {
|
|
tmp = append(tmp, v.vt100...)
|
|
tmp = append(tmp, v.char)
|
|
}
|
|
return tmp
|
|
}
|
|
|
|
func (l *lineEdit) String() string {
|
|
return string(l.Bytes())
|
|
}
|