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Fixing "blinking" printing issue when text to be replaced is too large #13

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Fixing "blinking" printing issue when text to be replaced is too large #13

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9 changes: 5 additions & 4 deletions writer_posix.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,11 +4,12 @@ package uilive

import (
"fmt"
"strings"
)

// clear the line and move the cursor up
var clear = fmt.Sprintf("%c[%dA%c[2K", ESC, 1, ESC)

func (w *Writer) clearLines() {
for i := 0; i < w.lineCount; i++ {
fmt.Fprintf(w.Out, "%c[2K", ESC) // clear the line
fmt.Fprintf(w.Out, "%c[%dA", ESC, 1) // move the cursor up
}
fmt.Fprint(w.Out, strings.Repeat(clear, w.lineCount))
}
12 changes: 7 additions & 5 deletions writer_windows.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,9 +4,11 @@ package uilive

import (
"fmt"
"github.com/mattn/go-isatty"
"strings"
"syscall"
"unsafe"

"github.com/mattn/go-isatty"
)

var kernel32 = syscall.NewLazyDLL("kernel32.dll")
Expand All @@ -18,6 +20,9 @@ var (
procFillConsoleOutputAttribute = kernel32.NewProc("FillConsoleOutputAttribute")
)

// clear the line and move the cursor up
var clear = fmt.Sprintf("%c[%dA%c[2K", ESC, 1, ESC)

type short int16
type dword uint32
type word uint16
Expand Down Expand Up @@ -48,10 +53,7 @@ func (w *Writer) clearLines() {
ok = false
}
if !ok {
for i := 0; i < w.lineCount; i++ {
fmt.Fprintf(w.Out, "%c[%dA", ESC, 0) // move the cursor up
fmt.Fprintf(w.Out, "%c[2K\r", ESC) // clear the line
}
fmt.Fprint(w.Out, strings.Repeat(clear, w.lineCount))
return
}
fd := f.Fd()
Expand Down