2015-09-20 18:14:29 +03:00
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package readline
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import (
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"bytes"
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"io"
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2015-11-20 15:56:42 +03:00
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"strings"
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2015-10-04 16:56:34 +03:00
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"github.com/chzyer/readline/runes"
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2015-09-20 18:14:29 +03:00
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)
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2015-10-02 05:37:21 +03:00
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type runeBufferBck struct {
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buf []rune
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idx int
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}
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2015-09-20 18:14:29 +03:00
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type RuneBuffer struct {
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2015-09-22 13:16:24 +03:00
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buf []rune
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idx int
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2015-09-23 09:52:45 +03:00
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prompt []rune
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2015-09-22 13:16:24 +03:00
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w io.Writer
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2015-11-20 15:56:42 +03:00
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mask rune
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2015-09-27 05:12:15 +03:00
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cleanInScreen bool
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2016-02-18 06:25:41 +03:00
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interactive bool
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cfg *Config
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2015-10-02 05:37:21 +03:00
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bck *runeBufferBck
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}
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func (r *RuneBuffer) Backup() {
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r.bck = &runeBufferBck{r.buf, r.idx}
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}
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func (r *RuneBuffer) Restore() {
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r.Refresh(func() {
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if r.bck == nil {
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return
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}
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r.buf = r.bck.buf
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r.idx = r.bck.idx
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})
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2015-09-20 18:14:29 +03:00
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}
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2016-02-18 06:25:41 +03:00
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func NewRuneBuffer(w io.Writer, prompt string, mask rune, cfg *Config) *RuneBuffer {
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rb := &RuneBuffer{
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w: w,
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mask: mask,
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interactive: cfg.useInteractive(),
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cfg: cfg,
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2015-09-20 18:14:29 +03:00
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}
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2015-09-27 13:54:26 +03:00
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rb.SetPrompt(prompt)
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2015-09-20 18:14:29 +03:00
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return rb
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}
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2016-02-18 06:25:41 +03:00
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func (r *RuneBuffer) SetConfig(cfg *Config) {
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r.cfg = cfg
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r.interactive = cfg.useInteractive()
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}
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2015-11-20 15:56:42 +03:00
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func (r *RuneBuffer) SetMask(m rune) {
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r.mask = m
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}
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2015-09-25 07:45:39 +03:00
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func (r *RuneBuffer) CurrentWidth(x int) int {
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2015-10-04 16:56:34 +03:00
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return runes.WidthAll(r.buf[:x])
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2015-09-25 07:45:39 +03:00
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}
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2015-09-23 09:52:45 +03:00
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func (r *RuneBuffer) PromptLen() int {
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2015-10-04 16:56:34 +03:00
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return runes.WidthAll(runes.ColorFilter(r.prompt))
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2015-09-23 09:52:45 +03:00
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}
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2015-09-25 17:56:00 +03:00
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func (r *RuneBuffer) RuneSlice(i int) []rune {
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if i > 0 {
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rs := make([]rune, i)
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copy(rs, r.buf[r.idx:r.idx+i])
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return rs
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}
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rs := make([]rune, -i)
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copy(rs, r.buf[r.idx+i:r.idx])
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return rs
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}
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2015-09-20 18:14:29 +03:00
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func (r *RuneBuffer) Runes() []rune {
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2015-09-25 17:56:00 +03:00
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newr := make([]rune, len(r.buf))
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copy(newr, r.buf)
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return newr
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2015-09-20 18:14:29 +03:00
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}
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func (r *RuneBuffer) Pos() int {
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return r.idx
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}
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func (r *RuneBuffer) Len() int {
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return len(r.buf)
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}
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func (r *RuneBuffer) MoveToLineStart() {
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r.Refresh(func() {
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2015-09-28 06:13:39 +03:00
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if r.idx == 0 {
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return
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}
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2015-09-27 05:12:15 +03:00
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r.idx = 0
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})
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2015-09-20 18:14:29 +03:00
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}
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2015-09-21 08:13:30 +03:00
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func (r *RuneBuffer) MoveBackward() {
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2015-09-27 05:12:15 +03:00
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r.Refresh(func() {
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2015-09-28 06:13:39 +03:00
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if r.idx == 0 {
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return
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}
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2015-09-27 05:12:15 +03:00
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r.idx--
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})
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2015-09-20 18:14:29 +03:00
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}
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2015-09-23 08:52:26 +03:00
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func (r *RuneBuffer) WriteString(s string) {
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r.WriteRunes([]rune(s))
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2015-09-20 18:14:29 +03:00
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}
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func (r *RuneBuffer) WriteRune(s rune) {
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r.WriteRunes([]rune{s})
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2015-09-20 18:14:29 +03:00
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}
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2015-09-23 08:52:26 +03:00
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func (r *RuneBuffer) WriteRunes(s []rune) {
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r.Refresh(func() {
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tail := append(s, r.buf[r.idx:]...)
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r.buf = append(r.buf[:r.idx], tail...)
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r.idx += len(s)
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})
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2015-09-20 18:14:29 +03:00
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}
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2015-09-21 08:13:30 +03:00
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func (r *RuneBuffer) MoveForward() {
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2015-09-27 05:12:15 +03:00
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r.Refresh(func() {
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if r.idx == len(r.buf) {
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return
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}
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r.idx++
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})
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2015-09-20 18:14:29 +03:00
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}
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2015-10-02 05:37:21 +03:00
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func (r *RuneBuffer) Erase() {
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r.Refresh(func() {
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r.idx = 0
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r.buf = r.buf[:0]
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})
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}
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2015-10-01 17:44:43 +03:00
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func (r *RuneBuffer) Delete() (success bool) {
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2015-09-27 05:12:15 +03:00
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r.Refresh(func() {
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if r.idx == len(r.buf) {
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return
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}
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r.buf = append(r.buf[:r.idx], r.buf[r.idx+1:]...)
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2015-10-01 17:44:43 +03:00
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success = true
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2015-09-27 05:12:15 +03:00
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})
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2015-10-01 17:44:43 +03:00
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return
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2015-09-20 18:14:29 +03:00
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}
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func (r *RuneBuffer) DeleteWord() {
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if r.idx == len(r.buf) {
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return
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}
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2015-09-21 17:51:48 +03:00
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init := r.idx
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2015-09-23 06:59:39 +03:00
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for init < len(r.buf) && IsWordBreak(r.buf[init]) {
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2015-09-21 17:51:48 +03:00
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init++
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}
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for i := init + 1; i < len(r.buf); i++ {
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2015-09-23 06:59:39 +03:00
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if !IsWordBreak(r.buf[i]) && IsWordBreak(r.buf[i-1]) {
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2015-09-27 05:12:15 +03:00
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r.Refresh(func() {
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r.buf = append(r.buf[:r.idx], r.buf[i-1:]...)
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})
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2015-09-20 18:14:29 +03:00
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return
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}
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}
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2015-09-21 17:51:48 +03:00
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r.Kill()
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2015-09-20 18:14:29 +03:00
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}
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2015-10-01 17:44:43 +03:00
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func (r *RuneBuffer) MoveToPrevWord() (success bool) {
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2015-09-28 06:13:39 +03:00
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r.Refresh(func() {
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if r.idx == 0 {
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2015-09-20 18:14:29 +03:00
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return
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}
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2015-09-28 06:13:39 +03:00
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for i := r.idx - 1; i > 0; i-- {
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if !IsWordBreak(r.buf[i]) && IsWordBreak(r.buf[i-1]) {
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r.idx = i
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2015-10-01 17:44:43 +03:00
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success = true
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2015-09-28 06:13:39 +03:00
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return
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}
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}
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2015-09-27 05:12:15 +03:00
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r.idx = 0
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2015-10-01 17:44:43 +03:00
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success = true
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2015-09-27 05:12:15 +03:00
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})
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2015-10-01 17:44:43 +03:00
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return
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2015-09-20 18:14:29 +03:00
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}
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2015-09-28 06:13:39 +03:00
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func (r *RuneBuffer) KillFront() {
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r.Refresh(func() {
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if r.idx == 0 {
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return
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}
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length := len(r.buf) - r.idx
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copy(r.buf[:length], r.buf[r.idx:])
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r.idx = 0
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r.buf = r.buf[:length]
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})
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2015-09-20 18:14:29 +03:00
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}
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2015-09-21 17:51:48 +03:00
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func (r *RuneBuffer) Kill() {
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2015-09-27 05:12:15 +03:00
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r.Refresh(func() {
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r.buf = r.buf[:r.idx]
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})
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2015-09-21 17:51:48 +03:00
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}
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2015-09-23 08:03:13 +03:00
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func (r *RuneBuffer) Transpose() {
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2015-09-28 06:13:39 +03:00
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r.Refresh(func() {
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2015-09-23 06:59:39 +03:00
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if len(r.buf) == 1 {
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2015-09-28 06:13:39 +03:00
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r.idx++
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2015-09-23 06:59:39 +03:00
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}
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2015-09-28 06:13:39 +03:00
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if len(r.buf) < 2 {
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return
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}
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2015-09-27 05:12:15 +03:00
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if r.idx == 0 {
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r.idx = 1
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} else if r.idx >= len(r.buf) {
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r.idx = len(r.buf) - 1
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}
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r.buf[r.idx], r.buf[r.idx-1] = r.buf[r.idx-1], r.buf[r.idx]
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r.idx++
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})
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2015-09-23 06:46:56 +03:00
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}
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2015-09-20 18:14:29 +03:00
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func (r *RuneBuffer) MoveToNextWord() {
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2015-09-28 06:13:39 +03:00
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r.Refresh(func() {
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for i := r.idx + 1; i < len(r.buf); i++ {
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if !IsWordBreak(r.buf[i]) && IsWordBreak(r.buf[i-1]) {
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2015-09-27 05:12:15 +03:00
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r.idx = i
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2015-09-28 06:13:39 +03:00
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return
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}
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2015-09-20 18:14:29 +03:00
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}
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2015-09-28 06:13:39 +03:00
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2015-09-27 05:12:15 +03:00
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r.idx = len(r.buf)
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})
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2015-09-20 18:14:29 +03:00
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}
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2015-09-21 16:00:48 +03:00
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func (r *RuneBuffer) BackEscapeWord() {
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2015-09-28 06:13:39 +03:00
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r.Refresh(func() {
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if r.idx == 0 {
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return
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}
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for i := r.idx - 1; i > 0; i-- {
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if !IsWordBreak(r.buf[i]) && IsWordBreak(r.buf[i-1]) {
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2015-09-27 05:12:15 +03:00
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r.buf = append(r.buf[:i], r.buf[r.idx:]...)
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r.idx = i
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2015-09-28 06:13:39 +03:00
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return
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}
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2015-09-21 16:00:48 +03:00
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}
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2015-09-27 05:12:15 +03:00
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r.buf = r.buf[:0]
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r.idx = 0
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})
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2015-09-21 16:00:48 +03:00
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}
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func (r *RuneBuffer) Backspace() {
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2015-09-27 05:12:15 +03:00
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r.Refresh(func() {
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2015-09-28 06:13:39 +03:00
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if r.idx == 0 {
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return
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}
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2015-09-27 05:12:15 +03:00
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r.idx--
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r.buf = append(r.buf[:r.idx], r.buf[r.idx+1:]...)
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})
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2015-09-20 18:14:29 +03:00
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}
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func (r *RuneBuffer) MoveToLineEnd() {
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2015-09-27 05:12:15 +03:00
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r.Refresh(func() {
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2015-09-28 06:13:39 +03:00
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if r.idx == len(r.buf) {
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return
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}
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2015-09-27 05:12:15 +03:00
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r.idx = len(r.buf)
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})
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2015-09-20 18:14:29 +03:00
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}
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2015-09-22 18:01:15 +03:00
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func (r *RuneBuffer) LineCount() int {
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2016-02-18 06:25:41 +03:00
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return LineCount(r.cfg.StdoutFd, runes.WidthAll(r.buf)+r.PromptLen())
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2015-09-22 18:01:15 +03:00
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}
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2015-10-01 17:44:43 +03:00
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func (r *RuneBuffer) MoveTo(ch rune, prevChar, reverse bool) (success bool) {
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r.Refresh(func() {
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if reverse {
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for i := r.idx - 1; i >= 0; i-- {
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if r.buf[i] == ch {
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r.idx = i
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if prevChar {
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r.idx++
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}
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success = true
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return
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}
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}
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return
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}
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for i := r.idx + 1; i < len(r.buf); i++ {
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if r.buf[i] == ch {
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r.idx = i
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if prevChar {
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r.idx--
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}
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success = true
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return
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}
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}
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})
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return
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}
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2015-09-22 18:01:15 +03:00
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func (r *RuneBuffer) IdxLine() int {
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2015-10-04 16:56:34 +03:00
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totalWidth := runes.WidthAll(r.buf[:r.idx]) + r.PromptLen()
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2016-02-18 06:25:41 +03:00
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|
|
w := getWidth(r.cfg.StdoutFd)
|
2016-02-19 01:25:32 +03:00
|
|
|
if w <= 0 {
|
2016-02-18 06:25:41 +03:00
|
|
|
return -1
|
2015-09-30 11:13:36 +03:00
|
|
|
}
|
2015-09-27 05:12:15 +03:00
|
|
|
line := totalWidth / w
|
2015-09-28 06:13:39 +03:00
|
|
|
|
|
|
|
// if cursor is in last colmun and not any character behind it
|
|
|
|
// the cursor will in the first line, otherwise will in the second line
|
|
|
|
// this situation only occurs in golang's Stdout
|
|
|
|
// TODO: figure out why
|
2015-09-29 16:01:17 +03:00
|
|
|
if totalWidth%w == 0 && len(r.buf) == r.idx && !isWindows {
|
2015-09-27 05:12:15 +03:00
|
|
|
line--
|
2015-09-22 18:01:15 +03:00
|
|
|
}
|
2015-09-28 06:13:39 +03:00
|
|
|
|
2015-09-22 18:01:15 +03:00
|
|
|
return line
|
|
|
|
}
|
|
|
|
|
|
|
|
func (r *RuneBuffer) CursorLineCount() int {
|
|
|
|
return r.LineCount() - r.IdxLine()
|
|
|
|
}
|
|
|
|
|
2015-09-27 05:12:15 +03:00
|
|
|
func (r *RuneBuffer) Refresh(f func()) {
|
2016-02-18 06:25:41 +03:00
|
|
|
if !r.interactive {
|
|
|
|
if f != nil {
|
|
|
|
f()
|
|
|
|
}
|
|
|
|
return
|
|
|
|
}
|
2015-09-27 05:12:15 +03:00
|
|
|
r.Clean()
|
|
|
|
if f != nil {
|
|
|
|
f()
|
|
|
|
}
|
|
|
|
r.w.Write(r.output())
|
|
|
|
r.cleanInScreen = false
|
2015-09-20 18:14:29 +03:00
|
|
|
}
|
|
|
|
|
2015-09-27 05:12:15 +03:00
|
|
|
func (r *RuneBuffer) output() []byte {
|
2015-09-20 18:14:29 +03:00
|
|
|
buf := bytes.NewBuffer(nil)
|
2015-09-23 09:52:45 +03:00
|
|
|
buf.WriteString(string(r.prompt))
|
2015-11-20 15:56:42 +03:00
|
|
|
if r.mask != 0 && len(r.buf) > 0 {
|
|
|
|
buf.Write([]byte(strings.Repeat(string(r.mask), len(r.buf)-1)))
|
|
|
|
if r.buf[len(r.buf)-1] == '\n' {
|
|
|
|
buf.Write([]byte{'\n'})
|
|
|
|
} else {
|
|
|
|
buf.Write([]byte(string(r.mask)))
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
buf.Write([]byte(string(r.buf)))
|
|
|
|
}
|
2015-09-23 06:10:36 +03:00
|
|
|
if len(r.buf) > r.idx {
|
2015-10-04 16:56:34 +03:00
|
|
|
buf.Write(runes.Backspace(r.buf[r.idx:]))
|
2015-09-23 06:10:36 +03:00
|
|
|
}
|
2015-09-20 18:14:29 +03:00
|
|
|
return buf.Bytes()
|
|
|
|
}
|
|
|
|
|
|
|
|
func (r *RuneBuffer) Reset() []rune {
|
2016-02-17 17:20:03 +03:00
|
|
|
ret := runes.Copy(r.buf)
|
2015-09-20 18:14:29 +03:00
|
|
|
r.buf = r.buf[:0]
|
|
|
|
r.idx = 0
|
|
|
|
return ret
|
|
|
|
}
|
2015-09-21 08:13:30 +03:00
|
|
|
|
2015-09-25 07:45:39 +03:00
|
|
|
func (r *RuneBuffer) calWidth(m int) int {
|
|
|
|
if m > 0 {
|
2015-10-04 16:56:34 +03:00
|
|
|
return runes.WidthAll(r.buf[r.idx : r.idx+m])
|
2015-09-25 07:45:39 +03:00
|
|
|
}
|
2015-10-04 16:56:34 +03:00
|
|
|
return runes.WidthAll(r.buf[r.idx+m : r.idx])
|
2015-09-25 07:45:39 +03:00
|
|
|
}
|
|
|
|
|
2015-09-23 06:10:36 +03:00
|
|
|
func (r *RuneBuffer) SetStyle(start, end int, style string) {
|
|
|
|
if end < start {
|
|
|
|
panic("end < start")
|
|
|
|
}
|
|
|
|
|
|
|
|
// goto start
|
2015-09-25 07:45:39 +03:00
|
|
|
move := start - r.idx
|
2015-09-23 06:10:36 +03:00
|
|
|
if move > 0 {
|
|
|
|
r.w.Write([]byte(string(r.buf[r.idx : r.idx+move])))
|
|
|
|
} else {
|
2015-09-25 07:45:39 +03:00
|
|
|
r.w.Write(bytes.Repeat([]byte("\b"), r.calWidth(move)))
|
2015-09-23 06:10:36 +03:00
|
|
|
}
|
2015-09-29 12:49:58 +03:00
|
|
|
r.w.Write([]byte("\033[" + style + "m"))
|
2015-09-23 06:10:36 +03:00
|
|
|
r.w.Write([]byte(string(r.buf[start:end])))
|
|
|
|
r.w.Write([]byte("\033[0m"))
|
2015-09-25 07:45:39 +03:00
|
|
|
// TODO: move back
|
2015-09-23 06:10:36 +03:00
|
|
|
}
|
|
|
|
|
2015-09-22 18:01:15 +03:00
|
|
|
func (r *RuneBuffer) SetWithIdx(idx int, buf []rune) {
|
2015-09-27 05:12:15 +03:00
|
|
|
r.Refresh(func() {
|
|
|
|
r.buf = buf
|
|
|
|
r.idx = idx
|
|
|
|
})
|
2015-09-21 08:13:30 +03:00
|
|
|
}
|
2015-09-22 18:01:15 +03:00
|
|
|
|
|
|
|
func (r *RuneBuffer) Set(buf []rune) {
|
|
|
|
r.SetWithIdx(len(buf), buf)
|
|
|
|
}
|
2015-09-28 19:26:49 +03:00
|
|
|
|
|
|
|
func (r *RuneBuffer) SetPrompt(prompt string) {
|
|
|
|
r.prompt = []rune(prompt)
|
|
|
|
}
|
|
|
|
|
|
|
|
func (r *RuneBuffer) cleanOutput() []byte {
|
|
|
|
buf := bytes.NewBuffer(nil)
|
|
|
|
buf.Write([]byte("\033[J")) // just like ^k :)
|
|
|
|
|
|
|
|
idxLine := r.IdxLine()
|
2015-09-29 16:01:17 +03:00
|
|
|
|
2015-09-28 19:26:49 +03:00
|
|
|
if idxLine == 0 {
|
|
|
|
buf.WriteString("\033[2K\r")
|
|
|
|
return buf.Bytes()
|
|
|
|
}
|
|
|
|
for i := 0; i < idxLine; i++ {
|
2015-09-29 16:01:17 +03:00
|
|
|
buf.WriteString("\033[2K\r\033[A")
|
2015-09-28 19:26:49 +03:00
|
|
|
}
|
2015-09-29 16:01:17 +03:00
|
|
|
buf.WriteString("\033[2K\r")
|
2015-09-28 19:26:49 +03:00
|
|
|
return buf.Bytes()
|
|
|
|
}
|
|
|
|
|
|
|
|
func (r *RuneBuffer) Clean() {
|
2016-02-18 06:25:41 +03:00
|
|
|
if r.cleanInScreen || !r.interactive {
|
2015-09-28 19:26:49 +03:00
|
|
|
return
|
|
|
|
}
|
|
|
|
r.cleanInScreen = true
|
|
|
|
r.w.Write(r.cleanOutput())
|
|
|
|
}
|