77b0547b3d
Fix some issues with Windows terminal handling with respect to TTYs that came up as part of the code that adds support for terminal resizing.
62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
/*
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Copyright 2016 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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"time"
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"k8s.io/kubernetes/pkg/util/runtime"
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)
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// monitorResizeEvents spawns a goroutine that periodically gets the terminal size and tries to send
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// it to the resizeEvents channel if the size has changed. The goroutine stops when the stop channel
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// is closed.
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func monitorResizeEvents(fd uintptr, resizeEvents chan<- Size, stop chan struct{}) {
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go func() {
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defer runtime.HandleCrash()
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size := GetSize(fd)
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if size == nil {
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return
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}
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lastSize := *size
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for {
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// see if we need to stop running
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select {
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case <-stop:
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return
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default:
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}
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size := GetSize(fd)
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if size == nil {
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return
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}
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if size.Height != lastSize.Height || size.Width != lastSize.Width {
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lastSize.Height = size.Height
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lastSize.Width = size.Width
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resizeEvents <- *size
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}
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// sleep to avoid hot looping
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time.Sleep(250 * time.Millisecond)
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}
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}()
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}
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