github.com/ethanhsieh/snapd@v0.0.0-20210615102523-3db9b8e4edc5/usersession/userd/ui/kdialog.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2018 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package ui
    21  
    22  import (
    23  	"fmt"
    24  	"html"
    25  	"os/exec"
    26  	"time"
    27  )
    28  
    29  // KDialog provides a kdialog based UI interface
    30  type KDialog struct{}
    31  
    32  // YesNo asks a yes/no question using kdialog
    33  func (*KDialog) YesNo(primary, secondary string, options *DialogOptions) bool {
    34  	if options == nil {
    35  		options = &DialogOptions{}
    36  	}
    37  
    38  	txt := fmt.Sprintf(`<p><big><b>%s</b></big></p><p>%s</p>`, html.EscapeString(primary), html.EscapeString(secondary))
    39  	if options.Footer != "" {
    40  		txt += fmt.Sprintf(`<p><small>%s</small></p>`, html.EscapeString(options.Footer))
    41  	}
    42  	cmd := exec.Command("kdialog", "--yesno="+txt)
    43  	if err := cmd.Start(); err != nil {
    44  		return false
    45  	}
    46  
    47  	var err error
    48  	if options.Timeout > 0 {
    49  		done := make(chan error, 1)
    50  		go func() { done <- cmd.Wait() }()
    51  		select {
    52  		case err = <-done:
    53  			// normal exit
    54  		case <-time.After(options.Timeout):
    55  			// timeout do nothing, the other side will have timed
    56  			// out as well, no need to send a reply.
    57  			cmd.Process.Kill()
    58  			return false
    59  		}
    60  	} else {
    61  		err = cmd.Wait()
    62  	}
    63  	if err == nil {
    64  		return true
    65  	}
    66  
    67  	return false
    68  }