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|
package readline
import (
"container/list"
"fmt"
"io"
"os"
"sync"
"syscall"
"github.com/ergochat/readline/internal/term"
)
const (
CharLineStart = 1
CharBackward = 2
CharInterrupt = 3
CharEOT = 4
CharLineEnd = 5
CharForward = 6
CharBell = 7
CharCtrlH = 8
CharTab = 9
CharCtrlJ = 10
CharKill = 11
CharCtrlL = 12
CharEnter = 13
CharNext = 14
CharPrev = 16
CharBckSearch = 18
CharFwdSearch = 19
CharTranspose = 20
CharCtrlU = 21
CharCtrlW = 23
CharCtrlY = 25
CharCtrlZ = 26
CharEsc = 27
CharCtrl_ = 31
CharO = 79
CharEscapeEx = 91
CharBackspace = 127
)
const (
MetaBackward rune = -iota - 1
MetaForward
MetaDelete
MetaBackspace
MetaTranspose
MetaShiftTab
MetaDeleteKey
)
type rawModeHandler struct {
sync.Mutex
state *term.State
}
func (r *rawModeHandler) Enter() (err error) {
r.Lock()
defer r.Unlock()
r.state, err = term.MakeRaw(int(syscall.Stdin))
return err
}
func (r *rawModeHandler) Exit() error {
r.Lock()
defer r.Unlock()
if r.state == nil {
return nil
}
err := term.Restore(int(syscall.Stdin), r.state)
if err == nil {
r.state = nil
}
return err
}
func clearScreen(w io.Writer) error {
_, err := w.Write([]byte("\x1b[H\x1b[J"))
return err
}
// -----------------------------------------------------------------------------
// print a linked list to Debug()
func debugList(l *list.List) {
idx := 0
for e := l.Front(); e != nil; e = e.Next() {
debugPrint("%d %+v", idx, e.Value)
idx++
}
}
// append log info to another file
func debugPrint(fmtStr string, o ...interface{}) {
f, _ := os.OpenFile("debug.tmp", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644)
fmt.Fprintf(f, fmtStr, o...)
fmt.Fprintln(f)
f.Close()
}
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