github.com/meulengracht/snapd@v0.0.0-20210719210640-8bde69bcc84e/usersession/userd/ui/zenity.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  	"os/exec"
    25  	"time"
    26  )
    27  
    28  // Zenity provides a zenity based UI interface
    29  type Zenity struct{}
    30  
    31  // YesNo asks a yes/no question using zenity
    32  func (*Zenity) YesNo(primary, secondary string, options *DialogOptions) bool {
    33  	if options == nil {
    34  		options = &DialogOptions{}
    35  	}
    36  
    37  	txt := fmt.Sprintf("<big><b>%s</b></big>\n\n%s", primary, secondary)
    38  	if options.Footer != "" {
    39  		txt += fmt.Sprintf("\n\n<span size=\"x-small\">%s</span>", options.Footer)
    40  	}
    41  	args := []string{"--question", "--modal", "--text=" + txt}
    42  	if options.Timeout > 0 {
    43  		args = append(args, fmt.Sprintf("--timeout=%d", int(options.Timeout/time.Second)))
    44  	}
    45  	// Gtk is not doing a good job with long labels. It will
    46  	// create a very narrow and long window (minimal width to fit
    47  	// the buttons).  So force a bigger width here. See also LP:
    48  	// 1778484. The primary number is lower because the header is
    49  	// in a bigger font.
    50  	if len(primary) > 10 || len(secondary) > 20 {
    51  		args = append(args, "--width=500")
    52  	}
    53  
    54  	cmd := exec.Command("zenity", args...)
    55  	if err := cmd.Start(); err != nil {
    56  		return false
    57  	}
    58  
    59  	if err := cmd.Wait(); err != nil {
    60  		return false
    61  	}
    62  
    63  	return true
    64  }