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multiChoice: refresh only if it is necessary #75

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multiChoice: refresh only if it is necessary #75

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17f86db
multiChoice: refresh only if it is necessary
Jan 29, 2018
a934721
multiChoice: use stdout.Fd instead of hardcoded zero
Feb 13, 2018
aa7686a
Change \b to \r<spaces>\r (#3)
dssysolyatin Apr 12, 2019
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9 changes: 7 additions & 2 deletions ishell.go
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Original file line number Diff line number Diff line change
Expand Up @@ -478,7 +478,8 @@ func (s *Shell) multiChoice(options []string, text string, init []int, multiResu
return nil
}

_, maxRows, err := readline.GetSize(0)
stdoutFd := int(os.Stdout.Fd())
_, maxRows, err := readline.GetSize(stdoutFd)
if err != nil {
return nil
}
Expand Down Expand Up @@ -533,13 +534,17 @@ func (s *Shell) multiChoice(options []string, text string, init []int, multiResu
if multiResults {
selected = toggle(selected, cur)
}
} else {
return
}
refresh <- struct{}{}
return
}
conf.Listener = readline.FuncListener(listener)
oldconf := s.reader.scanner.SetConfig(conf)

update()

stop := make(chan struct{})
defer func() {
stop <- struct{}{}
Expand All @@ -555,7 +560,7 @@ func (s *Shell) multiChoice(options []string, text string, init []int, multiResu
case <-refresh:
update()
case <-t.C:
_, rows, _ := readline.GetSize(0)
_, rows, _ := readline.GetSize(stdoutFd)
if maxRows != rows {
maxRows = rows
update()
Expand Down
16 changes: 12 additions & 4 deletions progress.go
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Original file line number Diff line number Diff line change
Expand Up @@ -119,17 +119,25 @@ func (p *progressBarImpl) write(s string) error {
}

func (p *progressBarImpl) erase(n int) {
for i := 0; i < n; i++ {
p.writer.Write([]byte{'\b'})
// Don't use '\b' - it's only move cursor to back
b := make([]byte, 0, n+2)
b = append(b, '\r')
for i := 0; i < n; i ++ {
b = append(b, ' ')
}
b = append(b, '\r')
p.writer.Write(b)
}

func (p *progressBarImpl) done() {
p.wMutex.Lock()
defer p.wMutex.Unlock()

p.erase(p.writtenLen)
fmt.Fprintln(p.writer, p.final)
if p.final != "" {
p.erase(p.writtenLen)
fmt.Fprintln(p.writer, p.final)
}

}

func (p *progressBarImpl) output() string {
Expand Down