github.com/hanks177/podman/v4@v4.1.3-0.20220613032544-16d90015bc83/pkg/kubeutils/resize.go (about)

     1  /*
     2  Copyright 2015 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      https://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package kubeutils
    18  
    19  import (
    20  	"github.com/hanks177/podman/v4/libpod/define"
    21  )
    22  
    23  // HandleResizing spawns a goroutine that processes the resize channel, calling resizeFunc for each
    24  // remotecommand.TerminalSize received from the channel. The resize channel must be closed elsewhere to stop the
    25  // goroutine.
    26  func HandleResizing(resize <-chan define.TerminalSize, resizeFunc func(size define.TerminalSize)) {
    27  	if resize == nil {
    28  		return
    29  	}
    30  
    31  	go func() {
    32  		for {
    33  			size, ok := <-resize
    34  			if !ok {
    35  				return
    36  			}
    37  			if size.Height < 1 || size.Width < 1 {
    38  				continue
    39  			}
    40  			resizeFunc(size)
    41  		}
    42  	}()
    43  }