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authorValentin Rothberg <rothberg@redhat.com>2020-10-07 16:58:53 +0200
committerValentin Rothberg <rothberg@redhat.com>2020-11-13 15:40:06 +0100
commit8e4a42aa429c6dec0d5face7c69554d8a0677e96 (patch)
treebbfff77e7b32a8b46af6f57d42965a7751bec18e /vendor/github.com/chzyer/readline/runebuf.go
parent0b1a60ec27928a40ac827148c1517098612616bd (diff)
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short-name aliasing
Add support for short-name aliasing. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Diffstat (limited to 'vendor/github.com/chzyer/readline/runebuf.go')
-rw-r--r--vendor/github.com/chzyer/readline/runebuf.go629
1 files changed, 629 insertions, 0 deletions
diff --git a/vendor/github.com/chzyer/readline/runebuf.go b/vendor/github.com/chzyer/readline/runebuf.go
new file mode 100644
index 000000000..81d2da50c
--- /dev/null
+++ b/vendor/github.com/chzyer/readline/runebuf.go
@@ -0,0 +1,629 @@
+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)
+}