forked from toolshed/abra
58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
//go:build windows
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// +build windows
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package windowsconsole
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import (
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"io"
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"os"
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ansiterm "github.com/Azure/go-ansiterm"
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"github.com/Azure/go-ansiterm/winterm"
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)
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// ansiWriter wraps a standard output file (e.g., os.Stdout) providing ANSI sequence translation.
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type ansiWriter struct {
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file *os.File
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fd uintptr
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infoReset *winterm.CONSOLE_SCREEN_BUFFER_INFO
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command []byte
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escapeSequence []byte
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inAnsiSequence bool
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parser *ansiterm.AnsiParser
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}
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// NewAnsiWriter returns an io.Writer that provides VT100 terminal emulation on top of a
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// Windows console output handle.
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func NewAnsiWriter(nFile int) io.Writer {
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file, fd := winterm.GetStdFile(nFile)
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info, err := winterm.GetConsoleScreenBufferInfo(fd)
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if err != nil {
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return nil
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}
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parser := ansiterm.CreateParser("Ground", winterm.CreateWinEventHandler(fd, file))
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return &ansiWriter{
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file: file,
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fd: fd,
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infoReset: info,
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command: make([]byte, 0, ansiterm.ANSI_MAX_CMD_LENGTH),
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escapeSequence: []byte(ansiterm.KEY_ESC_CSI),
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parser: parser,
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}
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}
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func (aw *ansiWriter) Fd() uintptr {
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return aw.fd
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}
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// Write writes len(p) bytes from p to the underlying data stream.
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func (aw *ansiWriter) Write(p []byte) (total int, err error) {
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if len(p) == 0 {
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return 0, nil
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}
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return aw.parser.Parse(p)
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}
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