github.com/noxiouz/docker@v0.7.3-0.20160629055221-3d231c78e8c5/pkg/term/windows/ansi_writer.go (about)

     1  // +build windows
     2  
     3  package windows
     4  
     5  import (
     6  	"os"
     7  
     8  	ansiterm "github.com/Azure/go-ansiterm"
     9  	"github.com/Azure/go-ansiterm/winterm"
    10  )
    11  
    12  // ansiWriter wraps a standard output file (e.g., os.Stdout) providing ANSI sequence translation.
    13  type ansiWriter struct {
    14  	file           *os.File
    15  	fd             uintptr
    16  	infoReset      *winterm.CONSOLE_SCREEN_BUFFER_INFO
    17  	command        []byte
    18  	escapeSequence []byte
    19  	inAnsiSequence bool
    20  	parser         *ansiterm.AnsiParser
    21  }
    22  
    23  func newAnsiWriter(nFile int) *ansiWriter {
    24  	initLogger()
    25  	file, fd := winterm.GetStdFile(nFile)
    26  	info, err := winterm.GetConsoleScreenBufferInfo(fd)
    27  	if err != nil {
    28  		return nil
    29  	}
    30  
    31  	parser := ansiterm.CreateParser("Ground", winterm.CreateWinEventHandler(fd, file))
    32  	logger.Infof("newAnsiWriter: parser %p", parser)
    33  
    34  	aw := &ansiWriter{
    35  		file:           file,
    36  		fd:             fd,
    37  		infoReset:      info,
    38  		command:        make([]byte, 0, ansiterm.ANSI_MAX_CMD_LENGTH),
    39  		escapeSequence: []byte(ansiterm.KEY_ESC_CSI),
    40  		parser:         parser,
    41  	}
    42  
    43  	logger.Infof("newAnsiWriter: aw.parser %p", aw.parser)
    44  	logger.Infof("newAnsiWriter: %v", aw)
    45  	return aw
    46  }
    47  
    48  func (aw *ansiWriter) Fd() uintptr {
    49  	return aw.fd
    50  }
    51  
    52  // Write writes len(p) bytes from p to the underlying data stream.
    53  func (aw *ansiWriter) Write(p []byte) (total int, err error) {
    54  	if len(p) == 0 {
    55  		return 0, nil
    56  	}
    57  
    58  	logger.Infof("Write: % x", p)
    59  	logger.Infof("Write: %s", string(p))
    60  	return aw.parser.Parse(p)
    61  }