mirror of https://github.com/docker/cli.git
70 lines
1.5 KiB
Go
70 lines
1.5 KiB
Go
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package command
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import (
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"io"
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"os"
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"github.com/Sirupsen/logrus"
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"github.com/docker/docker/pkg/term"
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)
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// OutStream is an output stream used by the DockerCli to write normal program
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// output.
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type OutStream struct {
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out io.Writer
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fd uintptr
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isTerminal bool
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state *term.State
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}
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func (o *OutStream) Write(p []byte) (int, error) {
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return o.out.Write(p)
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}
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// FD returns the file descriptor number for this stream
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func (o *OutStream) FD() uintptr {
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return o.fd
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}
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// IsTerminal returns true if this stream is connected to a terminal
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func (o *OutStream) IsTerminal() bool {
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return o.isTerminal
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}
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// SetRawTerminal sets raw mode on the output terminal
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func (o *OutStream) SetRawTerminal() (err error) {
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if os.Getenv("NORAW") != "" || !o.isTerminal {
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return nil
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}
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o.state, err = term.SetRawTerminalOutput(o.fd)
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return err
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}
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// RestoreTerminal restores normal mode to the terminal
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func (o *OutStream) RestoreTerminal() {
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if o.state != nil {
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term.RestoreTerminal(o.fd, o.state)
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}
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}
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// GetTtySize returns the height and width in characters of the tty
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func (o *OutStream) GetTtySize() (int, int) {
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if !o.isTerminal {
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return 0, 0
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}
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ws, err := term.GetWinsize(o.fd)
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if err != nil {
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logrus.Debugf("Error getting size: %s", err)
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if ws == nil {
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return 0, 0
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}
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}
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return int(ws.Height), int(ws.Width)
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}
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// NewOutStream returns a new OutStream object from a Writer
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func NewOutStream(out io.Writer) *OutStream {
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fd, isTerminal := term.GetFdInfo(out)
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return &OutStream{out: out, fd: fd, isTerminal: isTerminal}
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}
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