github.com/kaydxh/golang@v0.0.131/go/os/term/term.go (about)

     1  /*
     2   *Copyright (c) 2022, kaydxh
     3   *
     4   *Permission is hereby granted, free of charge, to any person obtaining a copy
     5   *of this software and associated documentation files (the "Software"), to deal
     6   *in the Software without restriction, including without limitation the rights
     7   *to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     8   *copies of the Software, and to permit persons to whom the Software is
     9   *furnished to do so, subject to the following conditions:
    10   *
    11   *The above copyright notice and this permission notice shall be included in all
    12   *copies or substantial portions of the Software.
    13   *
    14   *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    15   *IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    16   *FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    17   *AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    18   *LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    19   *OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    20   *SOFTWARE.
    21   */
    22  package term
    23  
    24  import (
    25  	"fmt"
    26  	"io"
    27  
    28  	"github.com/moby/term"
    29  )
    30  
    31  // TerminalSize returns the current width and height of the user's terminal. If it isn't a terminal,
    32  // nil is returned. On error, zero values are returned for width and height.
    33  // Usually w must be the stdout of the process. Stderr won't work.
    34  func TerminalSize(w io.Writer) (int, int, error) {
    35  	outFd, isTerminal := term.GetFdInfo(w)
    36  	if !isTerminal {
    37  		return 0, 0, fmt.Errorf("given writer is no terminal")
    38  	}
    39  	winsize, err := term.GetWinsize(outFd)
    40  	if err != nil {
    41  		return 0, 0, err
    42  	}
    43  	return int(winsize.Width), int(winsize.Height), nil
    44  }