mirror of
https://github.com/strongdm/comply
synced 2024-11-05 07:25:26 +00:00
630 lines
11 KiB
Go
630 lines
11 KiB
Go
package readline
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"io"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
)
|
|
|
|
type runeBufferBck struct {
|
|
buf []rune
|
|
idx int
|
|
}
|
|
|
|
type RuneBuffer struct {
|
|
buf []rune
|
|
idx int
|
|
prompt []rune
|
|
w io.Writer
|
|
|
|
hadClean bool
|
|
interactive bool
|
|
cfg *Config
|
|
|
|
width int
|
|
|
|
bck *runeBufferBck
|
|
|
|
offset string
|
|
|
|
lastKill []rune
|
|
|
|
sync.Mutex
|
|
}
|
|
|
|
func (r* RuneBuffer) pushKill(text []rune) {
|
|
r.lastKill = append([]rune{}, text...)
|
|
}
|
|
|
|
func (r *RuneBuffer) OnWidthChange(newWidth int) {
|
|
r.Lock()
|
|
r.width = newWidth
|
|
r.Unlock()
|
|
}
|
|
|
|
func (r *RuneBuffer) Backup() {
|
|
r.Lock()
|
|
r.bck = &runeBufferBck{r.buf, r.idx}
|
|
r.Unlock()
|
|
}
|
|
|
|
func (r *RuneBuffer) Restore() {
|
|
r.Refresh(func() {
|
|
if r.bck == nil {
|
|
return
|
|
}
|
|
r.buf = r.bck.buf
|
|
r.idx = r.bck.idx
|
|
})
|
|
}
|
|
|
|
func NewRuneBuffer(w io.Writer, prompt string, cfg *Config, width int) *RuneBuffer {
|
|
rb := &RuneBuffer{
|
|
w: w,
|
|
interactive: cfg.useInteractive(),
|
|
cfg: cfg,
|
|
width: width,
|
|
}
|
|
rb.SetPrompt(prompt)
|
|
return rb
|
|
}
|
|
|
|
func (r *RuneBuffer) SetConfig(cfg *Config) {
|
|
r.Lock()
|
|
r.cfg = cfg
|
|
r.interactive = cfg.useInteractive()
|
|
r.Unlock()
|
|
}
|
|
|
|
func (r *RuneBuffer) SetMask(m rune) {
|
|
r.Lock()
|
|
r.cfg.MaskRune = m
|
|
r.Unlock()
|
|
}
|
|
|
|
func (r *RuneBuffer) CurrentWidth(x int) int {
|
|
r.Lock()
|
|
defer r.Unlock()
|
|
return runes.WidthAll(r.buf[:x])
|
|
}
|
|
|
|
func (r *RuneBuffer) PromptLen() int {
|
|
r.Lock()
|
|
width := r.promptLen()
|
|
r.Unlock()
|
|
return width
|
|
}
|
|
|
|
func (r *RuneBuffer) promptLen() int {
|
|
return runes.WidthAll(runes.ColorFilter(r.prompt))
|
|
}
|
|
|
|
func (r *RuneBuffer) RuneSlice(i int) []rune {
|
|
r.Lock()
|
|
defer r.Unlock()
|
|
|
|
if i > 0 {
|
|
rs := make([]rune, i)
|
|
copy(rs, r.buf[r.idx:r.idx+i])
|
|
return rs
|
|
}
|
|
rs := make([]rune, -i)
|
|
copy(rs, r.buf[r.idx+i:r.idx])
|
|
return rs
|
|
}
|
|
|
|
func (r *RuneBuffer) Runes() []rune {
|
|
r.Lock()
|
|
newr := make([]rune, len(r.buf))
|
|
copy(newr, r.buf)
|
|
r.Unlock()
|
|
return newr
|
|
}
|
|
|
|
func (r *RuneBuffer) Pos() int {
|
|
r.Lock()
|
|
defer r.Unlock()
|
|
return r.idx
|
|
}
|
|
|
|
func (r *RuneBuffer) Len() int {
|
|
r.Lock()
|
|
defer r.Unlock()
|
|
return len(r.buf)
|
|
}
|
|
|
|
func (r *RuneBuffer) MoveToLineStart() {
|
|
r.Refresh(func() {
|
|
if r.idx == 0 {
|
|
return
|
|
}
|
|
r.idx = 0
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) MoveBackward() {
|
|
r.Refresh(func() {
|
|
if r.idx == 0 {
|
|
return
|
|
}
|
|
r.idx--
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) WriteString(s string) {
|
|
r.WriteRunes([]rune(s))
|
|
}
|
|
|
|
func (r *RuneBuffer) WriteRune(s rune) {
|
|
r.WriteRunes([]rune{s})
|
|
}
|
|
|
|
func (r *RuneBuffer) WriteRunes(s []rune) {
|
|
r.Refresh(func() {
|
|
tail := append(s, r.buf[r.idx:]...)
|
|
r.buf = append(r.buf[:r.idx], tail...)
|
|
r.idx += len(s)
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) MoveForward() {
|
|
r.Refresh(func() {
|
|
if r.idx == len(r.buf) {
|
|
return
|
|
}
|
|
r.idx++
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) IsCursorInEnd() bool {
|
|
r.Lock()
|
|
defer r.Unlock()
|
|
return r.idx == len(r.buf)
|
|
}
|
|
|
|
func (r *RuneBuffer) Replace(ch rune) {
|
|
r.Refresh(func() {
|
|
r.buf[r.idx] = ch
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) Erase() {
|
|
r.Refresh(func() {
|
|
r.idx = 0
|
|
r.pushKill(r.buf[:])
|
|
r.buf = r.buf[:0]
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) Delete() (success bool) {
|
|
r.Refresh(func() {
|
|
if r.idx == len(r.buf) {
|
|
return
|
|
}
|
|
r.pushKill(r.buf[r.idx : r.idx+1])
|
|
r.buf = append(r.buf[:r.idx], r.buf[r.idx+1:]...)
|
|
success = true
|
|
})
|
|
return
|
|
}
|
|
|
|
func (r *RuneBuffer) DeleteWord() {
|
|
if r.idx == len(r.buf) {
|
|
return
|
|
}
|
|
init := r.idx
|
|
for init < len(r.buf) && IsWordBreak(r.buf[init]) {
|
|
init++
|
|
}
|
|
for i := init + 1; i < len(r.buf); i++ {
|
|
if !IsWordBreak(r.buf[i]) && IsWordBreak(r.buf[i-1]) {
|
|
r.pushKill(r.buf[r.idx:i-1])
|
|
r.Refresh(func() {
|
|
r.buf = append(r.buf[:r.idx], r.buf[i-1:]...)
|
|
})
|
|
return
|
|
}
|
|
}
|
|
r.Kill()
|
|
}
|
|
|
|
func (r *RuneBuffer) MoveToPrevWord() (success bool) {
|
|
r.Refresh(func() {
|
|
if r.idx == 0 {
|
|
return
|
|
}
|
|
|
|
for i := r.idx - 1; i > 0; i-- {
|
|
if !IsWordBreak(r.buf[i]) && IsWordBreak(r.buf[i-1]) {
|
|
r.idx = i
|
|
success = true
|
|
return
|
|
}
|
|
}
|
|
r.idx = 0
|
|
success = true
|
|
})
|
|
return
|
|
}
|
|
|
|
func (r *RuneBuffer) KillFront() {
|
|
r.Refresh(func() {
|
|
if r.idx == 0 {
|
|
return
|
|
}
|
|
|
|
length := len(r.buf) - r.idx
|
|
r.pushKill(r.buf[:r.idx])
|
|
copy(r.buf[:length], r.buf[r.idx:])
|
|
r.idx = 0
|
|
r.buf = r.buf[:length]
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) Kill() {
|
|
r.Refresh(func() {
|
|
r.pushKill(r.buf[r.idx:])
|
|
r.buf = r.buf[:r.idx]
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) Transpose() {
|
|
r.Refresh(func() {
|
|
if len(r.buf) == 1 {
|
|
r.idx++
|
|
}
|
|
|
|
if len(r.buf) < 2 {
|
|
return
|
|
}
|
|
|
|
if r.idx == 0 {
|
|
r.idx = 1
|
|
} else if r.idx >= len(r.buf) {
|
|
r.idx = len(r.buf) - 1
|
|
}
|
|
r.buf[r.idx], r.buf[r.idx-1] = r.buf[r.idx-1], r.buf[r.idx]
|
|
r.idx++
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) MoveToNextWord() {
|
|
r.Refresh(func() {
|
|
for i := r.idx + 1; i < len(r.buf); i++ {
|
|
if !IsWordBreak(r.buf[i]) && IsWordBreak(r.buf[i-1]) {
|
|
r.idx = i
|
|
return
|
|
}
|
|
}
|
|
|
|
r.idx = len(r.buf)
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) MoveToEndWord() {
|
|
r.Refresh(func() {
|
|
// already at the end, so do nothing
|
|
if r.idx == len(r.buf) {
|
|
return
|
|
}
|
|
// if we are at the end of a word already, go to next
|
|
if !IsWordBreak(r.buf[r.idx]) && IsWordBreak(r.buf[r.idx+1]) {
|
|
r.idx++
|
|
}
|
|
|
|
// keep going until at the end of a word
|
|
for i := r.idx + 1; i < len(r.buf); i++ {
|
|
if IsWordBreak(r.buf[i]) && !IsWordBreak(r.buf[i-1]) {
|
|
r.idx = i - 1
|
|
return
|
|
}
|
|
}
|
|
r.idx = len(r.buf)
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) BackEscapeWord() {
|
|
r.Refresh(func() {
|
|
if r.idx == 0 {
|
|
return
|
|
}
|
|
for i := r.idx - 1; i > 0; i-- {
|
|
if !IsWordBreak(r.buf[i]) && IsWordBreak(r.buf[i-1]) {
|
|
r.pushKill(r.buf[i:r.idx])
|
|
r.buf = append(r.buf[:i], r.buf[r.idx:]...)
|
|
r.idx = i
|
|
return
|
|
}
|
|
}
|
|
|
|
r.buf = r.buf[:0]
|
|
r.idx = 0
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) Yank() {
|
|
if len(r.lastKill) == 0 {
|
|
return
|
|
}
|
|
r.Refresh(func() {
|
|
buf := make([]rune, 0, len(r.buf) + len(r.lastKill))
|
|
buf = append(buf, r.buf[:r.idx]...)
|
|
buf = append(buf, r.lastKill...)
|
|
buf = append(buf, r.buf[r.idx:]...)
|
|
r.buf = buf
|
|
r.idx += len(r.lastKill)
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) Backspace() {
|
|
r.Refresh(func() {
|
|
if r.idx == 0 {
|
|
return
|
|
}
|
|
|
|
r.idx--
|
|
r.buf = append(r.buf[:r.idx], r.buf[r.idx+1:]...)
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) MoveToLineEnd() {
|
|
r.Refresh(func() {
|
|
if r.idx == len(r.buf) {
|
|
return
|
|
}
|
|
|
|
r.idx = len(r.buf)
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) LineCount(width int) int {
|
|
if width == -1 {
|
|
width = r.width
|
|
}
|
|
return LineCount(width,
|
|
runes.WidthAll(r.buf)+r.PromptLen())
|
|
}
|
|
|
|
func (r *RuneBuffer) MoveTo(ch rune, prevChar, reverse bool) (success bool) {
|
|
r.Refresh(func() {
|
|
if reverse {
|
|
for i := r.idx - 1; i >= 0; i-- {
|
|
if r.buf[i] == ch {
|
|
r.idx = i
|
|
if prevChar {
|
|
r.idx++
|
|
}
|
|
success = true
|
|
return
|
|
}
|
|
}
|
|
return
|
|
}
|
|
for i := r.idx + 1; i < len(r.buf); i++ {
|
|
if r.buf[i] == ch {
|
|
r.idx = i
|
|
if prevChar {
|
|
r.idx--
|
|
}
|
|
success = true
|
|
return
|
|
}
|
|
}
|
|
})
|
|
return
|
|
}
|
|
|
|
func (r *RuneBuffer) isInLineEdge() bool {
|
|
if isWindows {
|
|
return false
|
|
}
|
|
sp := r.getSplitByLine(r.buf)
|
|
return len(sp[len(sp)-1]) == 0
|
|
}
|
|
|
|
func (r *RuneBuffer) getSplitByLine(rs []rune) []string {
|
|
return SplitByLine(r.promptLen(), r.width, rs)
|
|
}
|
|
|
|
func (r *RuneBuffer) IdxLine(width int) int {
|
|
r.Lock()
|
|
defer r.Unlock()
|
|
return r.idxLine(width)
|
|
}
|
|
|
|
func (r *RuneBuffer) idxLine(width int) int {
|
|
if width == 0 {
|
|
return 0
|
|
}
|
|
sp := r.getSplitByLine(r.buf[:r.idx])
|
|
return len(sp) - 1
|
|
}
|
|
|
|
func (r *RuneBuffer) CursorLineCount() int {
|
|
return r.LineCount(r.width) - r.IdxLine(r.width)
|
|
}
|
|
|
|
func (r *RuneBuffer) Refresh(f func()) {
|
|
r.Lock()
|
|
defer r.Unlock()
|
|
|
|
if !r.interactive {
|
|
if f != nil {
|
|
f()
|
|
}
|
|
return
|
|
}
|
|
|
|
r.clean()
|
|
if f != nil {
|
|
f()
|
|
}
|
|
r.print()
|
|
}
|
|
|
|
func (r *RuneBuffer) SetOffset(offset string) {
|
|
r.Lock()
|
|
r.offset = offset
|
|
r.Unlock()
|
|
}
|
|
|
|
func (r *RuneBuffer) print() {
|
|
r.w.Write(r.output())
|
|
r.hadClean = false
|
|
}
|
|
|
|
func (r *RuneBuffer) output() []byte {
|
|
buf := bytes.NewBuffer(nil)
|
|
buf.WriteString(string(r.prompt))
|
|
if r.cfg.EnableMask && len(r.buf) > 0 {
|
|
buf.Write([]byte(strings.Repeat(string(r.cfg.MaskRune), len(r.buf)-1)))
|
|
if r.buf[len(r.buf)-1] == '\n' {
|
|
buf.Write([]byte{'\n'})
|
|
} else {
|
|
buf.Write([]byte(string(r.cfg.MaskRune)))
|
|
}
|
|
if len(r.buf) > r.idx {
|
|
buf.Write(r.getBackspaceSequence())
|
|
}
|
|
|
|
} else {
|
|
for _, e := range r.cfg.Painter.Paint(r.buf, r.idx) {
|
|
if e == '\t' {
|
|
buf.WriteString(strings.Repeat(" ", TabWidth))
|
|
} else {
|
|
buf.WriteRune(e)
|
|
}
|
|
}
|
|
if r.isInLineEdge() {
|
|
buf.Write([]byte(" \b"))
|
|
}
|
|
}
|
|
// cursor position
|
|
if len(r.buf) > r.idx {
|
|
buf.Write(r.getBackspaceSequence())
|
|
}
|
|
return buf.Bytes()
|
|
}
|
|
|
|
func (r *RuneBuffer) getBackspaceSequence() []byte {
|
|
var sep = map[int]bool{}
|
|
|
|
var i int
|
|
for {
|
|
if i >= runes.WidthAll(r.buf) {
|
|
break
|
|
}
|
|
|
|
if i == 0 {
|
|
i -= r.promptLen()
|
|
}
|
|
i += r.width
|
|
|
|
sep[i] = true
|
|
}
|
|
var buf []byte
|
|
for i := len(r.buf); i > r.idx; i-- {
|
|
// move input to the left of one
|
|
buf = append(buf, '\b')
|
|
if sep[i] {
|
|
// up one line, go to the start of the line and move cursor right to the end (r.width)
|
|
buf = append(buf, "\033[A\r"+"\033["+strconv.Itoa(r.width)+"C"...)
|
|
}
|
|
}
|
|
|
|
return buf
|
|
|
|
}
|
|
|
|
func (r *RuneBuffer) Reset() []rune {
|
|
ret := runes.Copy(r.buf)
|
|
r.buf = r.buf[:0]
|
|
r.idx = 0
|
|
return ret
|
|
}
|
|
|
|
func (r *RuneBuffer) calWidth(m int) int {
|
|
if m > 0 {
|
|
return runes.WidthAll(r.buf[r.idx : r.idx+m])
|
|
}
|
|
return runes.WidthAll(r.buf[r.idx+m : r.idx])
|
|
}
|
|
|
|
func (r *RuneBuffer) SetStyle(start, end int, style string) {
|
|
if end < start {
|
|
panic("end < start")
|
|
}
|
|
|
|
// goto start
|
|
move := start - r.idx
|
|
if move > 0 {
|
|
r.w.Write([]byte(string(r.buf[r.idx : r.idx+move])))
|
|
} else {
|
|
r.w.Write(bytes.Repeat([]byte("\b"), r.calWidth(move)))
|
|
}
|
|
r.w.Write([]byte("\033[" + style + "m"))
|
|
r.w.Write([]byte(string(r.buf[start:end])))
|
|
r.w.Write([]byte("\033[0m"))
|
|
// TODO: move back
|
|
}
|
|
|
|
func (r *RuneBuffer) SetWithIdx(idx int, buf []rune) {
|
|
r.Refresh(func() {
|
|
r.buf = buf
|
|
r.idx = idx
|
|
})
|
|
}
|
|
|
|
func (r *RuneBuffer) Set(buf []rune) {
|
|
r.SetWithIdx(len(buf), buf)
|
|
}
|
|
|
|
func (r *RuneBuffer) SetPrompt(prompt string) {
|
|
r.Lock()
|
|
r.prompt = []rune(prompt)
|
|
r.Unlock()
|
|
}
|
|
|
|
func (r *RuneBuffer) cleanOutput(w io.Writer, idxLine int) {
|
|
buf := bufio.NewWriter(w)
|
|
|
|
if r.width == 0 {
|
|
buf.WriteString(strings.Repeat("\r\b", len(r.buf)+r.promptLen()))
|
|
buf.Write([]byte("\033[J"))
|
|
} else {
|
|
buf.Write([]byte("\033[J")) // just like ^k :)
|
|
if idxLine == 0 {
|
|
buf.WriteString("\033[2K")
|
|
buf.WriteString("\r")
|
|
} else {
|
|
for i := 0; i < idxLine; i++ {
|
|
io.WriteString(buf, "\033[2K\r\033[A")
|
|
}
|
|
io.WriteString(buf, "\033[2K\r")
|
|
}
|
|
}
|
|
buf.Flush()
|
|
return
|
|
}
|
|
|
|
func (r *RuneBuffer) Clean() {
|
|
r.Lock()
|
|
r.clean()
|
|
r.Unlock()
|
|
}
|
|
|
|
func (r *RuneBuffer) clean() {
|
|
r.cleanWithIdxLine(r.idxLine(r.width))
|
|
}
|
|
|
|
func (r *RuneBuffer) cleanWithIdxLine(idxLine int) {
|
|
if r.hadClean || !r.interactive {
|
|
return
|
|
}
|
|
r.hadClean = true
|
|
r.cleanOutput(r.w, idxLine)
|
|
}
|