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