github.com/containerd/nerdctl/v2@v2.0.0-beta.5.0.20240520001846-b5758f54fa28/pkg/consoleutil/consoleutil_windows.go (about)

     1  /*
     2     Copyright The containerd 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         http://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 consoleutil
    18  
    19  import (
    20  	gocontext "context"
    21  	"time"
    22  
    23  	"github.com/containerd/console"
    24  	"github.com/containerd/log"
    25  )
    26  
    27  // HandleConsoleResize resizes the console.
    28  // From https://github.com/containerd/containerd/blob/v1.7.0-rc.2/cmd/ctr/commands/tasks/tasks_windows.go#L34-L61
    29  func HandleConsoleResize(ctx gocontext.Context, task resizer, con console.Console) error {
    30  	// do an initial resize of the console
    31  	size, err := con.Size()
    32  	if err != nil {
    33  		return err
    34  	}
    35  	go func() {
    36  		prevSize := size
    37  		for {
    38  			time.Sleep(time.Millisecond * 250)
    39  
    40  			size, err := con.Size()
    41  			if err != nil {
    42  				log.G(ctx).WithError(err).Error("get pty size")
    43  				continue
    44  			}
    45  
    46  			if size.Width != prevSize.Width || size.Height != prevSize.Height {
    47  				if err := task.Resize(ctx, uint32(size.Width), uint32(size.Height)); err != nil {
    48  					log.G(ctx).WithError(err).Error("resize pty")
    49  				}
    50  				prevSize = size
    51  			}
    52  		}
    53  	}()
    54  	return nil
    55  }