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https://github.com/jesseduffield/lazygit.git
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61 lines
1.4 KiB
Go
61 lines
1.4 KiB
Go
// Copyright 2014 The gocui Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build !windows
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package gocui
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import (
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"os"
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"os/signal"
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"syscall"
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"unsafe"
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"github.com/go-errors/errors"
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)
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// getTermWindowSize is get terminal window size on linux or unix.
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// When gocui run inside the docker contaienr need to check and get the window size.
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func (g *Gui) getTermWindowSize() (int, int, error) {
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var sz struct {
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rows uint16
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cols uint16
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_ [2]uint16 // to match underlying syscall; see https://github.com/awesome-gocui/gocui/issues/33
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}
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var termw, termh int
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out, err := os.OpenFile("/dev/tty", os.O_RDWR, 0)
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if err != nil {
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return 0, 0, err
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}
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defer out.Close()
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signalCh := make(chan os.Signal, 1)
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signal.Notify(signalCh, syscall.SIGWINCH, syscall.SIGINT)
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for {
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_, _, _ = syscall.Syscall(syscall.SYS_IOCTL,
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out.Fd(), uintptr(syscall.TIOCGWINSZ), uintptr(unsafe.Pointer(&sz)))
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// check terminal window size
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termw, termh = int(sz.cols), int(sz.rows)
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if termw > 0 && termh > 0 {
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return termw, termh, nil
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}
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select {
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case signal := <-signalCh:
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switch signal {
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// when the terminal window size is changed
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case syscall.SIGWINCH:
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continue
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// ctrl + c to cancel
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case syscall.SIGINT:
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return 0, 0, errors.New("stop to get term window size")
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}
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}
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}
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}
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