2019-04-07 17:07:55 +00:00
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/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package term
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import (
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"fmt"
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"io"
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2020-08-10 17:43:49 +00:00
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"github.com/moby/term"
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2019-04-07 17:07:55 +00:00
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)
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// TerminalSize returns the current width and height of the user's terminal. If it isn't a terminal,
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// nil is returned. On error, zero values are returned for width and height.
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// Usually w must be the stdout of the process. Stderr won't work.
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func TerminalSize(w io.Writer) (int, int, error) {
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outFd, isTerminal := term.GetFdInfo(w)
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if !isTerminal {
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return 0, 0, fmt.Errorf("given writer is no terminal")
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}
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winsize, err := term.GetWinsize(outFd)
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if err != nil {
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return 0, 0, err
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}
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return int(winsize.Width), int(winsize.Height), nil
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}
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