# Functions that handle calling dialog(1) -*-perl-*-
# $Id: dialog.pl,v 1.4 2001/10/13 00:40:22 tom Exp $
# Return values are 1 for success and 0 for failure (or cancel)
# Resultant text (if any) is in dialog_result
# Unfortunately, the gauge requires use of /bin/sh to get going.
# I didn't bother to make the others shell-free, although it
# would be simple to do.
# Note that dialog generally returns 0 for success, so I invert the
# sense of the return code for more readable boolean expressions.
$scr_lines = 24;
require "flush.pl";
sub rhs_clear {
return system("dialog --clear");
}
sub rhs_textbox {
local ( $title, $file, $width, $height ) = @_;
system("dialog --title \"$title\" --textbox $file $height $width");
return 1;
}
sub rhs_msgbox {
local ( $title, $message, $width ) = @_;
local ( $tmp, $height, $message_len );
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$height = 4 + $message_len;
$tmp = system("dialog --title \"$title\" --msgbox \"$message\" $height $width");
if ($tmp) {
return 0;
} else {
return 1;
}
}
sub rhs_infobox {
local ( $title, $message, $width ) = @_;
local ( $tmp, $height, $message_len );
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$height = 2 + $message_len;
return system("dialog --title \"$title\" --infobox \"$message\" $height $width");
}
sub rhs_yesno {
local ( $title, $message, $width ) = @_;
local ( $tmp, $height, $message_len );
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$height = 4 + $message_len;
$tmp = system("dialog --title \"$title\" --yesno \"$message\" $height $width");
# Dumb: dialog returns 0 for "yes" and 1 for "no"
if (! $tmp) {
return 1;
} else {
return 0;
}
}
sub rhs_gauge {
local ( $title, $message, $width, $percent ) = @_;
local ( $tmp, $height, $message_len );
$gauge_width = $width;
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$height = 5 + $message_len;
open(GAUGE, "|dialog --title \"$title\" --gauge \"$message\" $height $width $percent");
}
sub rhs_update_gauge {
local ( $percent ) = @_;
&printflush(GAUGE, "$percent\n");
}
sub rhs_update_gauge_and_message {
local ( $message, $percent ) = @_;
$message = &rhs_wordwrap($message, $gauge_width);
$message =~ s/\n/\\n/g;
&printflush(GAUGE, "XXX\n$percent\n$message\nXXX\n");
}
sub rhs_stop_gauge {
close GAUGE;
}
sub rhs_inputbox {
local ( $title, $message, $width, $instr ) = @_;
local ( $tmp, $height, $message_len );
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$height = 7 + $message_len;
return &return_output(0, "dialog --title \"$title\" --inputbox \"$message\" $height $width \"$instr\"");
}
sub rhs_menu {
local ( $title, $message, $width, $numitems ) = @_;
local ( $i, $tmp, $ent, $height, $menuheight, @list, $message_len );
shift; shift; shift; shift;
@list = ();
for ($i = 0; $i < $numitems; $i++) {
$ent = shift;
$list[@list] = "\"$ent\"";
$ent = shift;
$list[@list] = "\"$ent\"";
}
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$height = $message_len + 6 + $numitems;
if ($height <= $scr_lines) {
$menuheight = $numitems;
} else {
$height = $scr_lines;
$menuheight = $scr_lines - $message_len - 6;
}
return &return_output(0, "dialog --title \"$title\" --menu \"$message\" $height $width $menuheight @list");
}
sub rhs_menul {
local ( $title, $message, $width, $numitems ) = @_;
local ( $i, $tmp, $ent, $height, $menuheight, @list, $message_len );
shift; shift; shift; shift;
@list = ();
for ($i = 0; $i < $numitems; $i++) {
$ent = shift;
$list[@list] = "\"$ent\"";
$list[@list] = "\"\"";
}
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$height = $message_len + 6 + $numitems;
if ($height <= $scr_lines) {
$menuheight = $numitems;
} else {
$height = $scr_lines;
$menuheight = $scr_lines - $message_len - 6;
}
return &return_output(0, "dialog --title \"$title\" --menu \"$message\" $height $width $menuheight @list");
}
sub rhs_menua {
local ( $title, $message, $width, %items ) = @_;
local ( $tmp, $ent, $height, $menuheight, @list, $message_len );
@list = ();
foreach $ent (sort keys (%items)) {
$list[@list] = "\"$ent\"";
$list[@list] = "\"$items{$ent}\"";
}
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$numitems = keys(%items);
$height = $message_len + 6 + $numitems;
if ($height <= $scr_lines) {
$menuheight = $numitems;
} else {
$height = $scr_lines;
$menuheight = $scr_lines - $message_len - 6;
}
return &return_output(0, "dialog --title \"$title\" --menu \"$message\" $height $width $menuheight @list");
}
sub rhs_checklist {
local ( $title, $message, $width, $numitems ) = @_;
local ( $i, $tmp, $ent, $height, $menuheight, @list, $message_len );
shift; shift; shift; shift;
@list = ();
for ($i = 0; $i < $numitems; $i++) {
$ent = shift;
$list[@list] = "\"$ent\"";
$ent = shift;
$list[@list] = "\"$ent\"";
$ent = shift;
if ($ent) {
$list[@list] = "ON";
} else {
$list[@list] = "OFF";
}
}
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$height = $message_len + 6 + $numitems;
if ($height <= $scr_lines) {
$menuheight = $numitems;
} else {
$height = $scr_lines;
$menuheight = $scr_lines - $message_len - 6;
}
return &return_output("list", "dialog --title \"$title\" --separate-output --checklist \"$message\" $height $width $menuheight @list");
}
sub rhs_checklistl {
local ( $title, $message, $width, $numitems ) = @_;
local ( $i, $tmp, $ent, $height, $menuheight, @list, $message_len );
shift; shift; shift; shift;
@list = ();
for ($i = 0; $i < $numitems; $i++) {
$ent = shift;
$list[@list] = "\"$ent\"";
$list[@list] = "\"\"";
$list[@list] = "OFF";
}
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$height = $message_len + 6 + $numitems;
if ($height <= $scr_lines) {
$menuheight = $numitems;
} else {
$height = $scr_lines;
$menuheight = $scr_lines - $message_len - 6;
}
return &return_output("list", "dialog --title \"$title\" --separate-output --checklist \"$message\" $height $width $menuheight @list");
}
sub rhs_checklista {
local ( $title, $message, $width, %items ) = @_;
local ( $tmp, $ent, $height, $menuheight, @list, $message_len );
shift; shift; shift; shift;
@list = ();
foreach $ent (sort keys (%items)) {
$list[@list] = "\"$ent\"";
$list[@list] = "\"$items{$ent}\"";
$list[@list] = "OFF";
}
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$numitems = keys(%items);
$height = $message_len + 6 + $numitems;
if ($height <= $scr_lines) {
$menuheight = $numitems;
} else {
$height = $scr_lines;
$menuheight = $scr_lines - $message_len - 6;
}
return &return_output("list", "dialog --title \"$title\" --separate-output --checklist \"$message\" $height $width $menuheight @list");
}
sub rhs_radiolist {
local ( $title, $message, $width, $numitems ) = @_;
local ( $i, $tmp, $ent, $height, $menuheight, @list, $message_len );
shift; shift; shift; shift;
@list = ();
for ($i = 0; $i < $numitems; $i++) {
$ent = shift;
$list[@list] = "\"$ent\"";
$ent = shift;
$list[@list] = "\"$ent\"";
$ent = shift;
if ($ent) {
$list[@list] = "ON";
} else {
$list[@list] = "OFF";
}
}
$message = &rhs_wordwrap($message, $width);
$message_len = split(/^/, $message);
$tmp = $message;
if (chop($tmp) eq "\n") {
$message_len++;
}
$height = $message_len + 6 + $numitems;
if ($height <= $scr_lines) {
$menuheight = $numitems;
} else {
$height = $scr_lines;
$menuheight = $scr_lines - $message_len - 6;
}
return &return_output(0 , "dialog --title \"$title\" --radiolist \"$message\" $height $width $menuheight @list");
}
sub return_output {
local ( $listp, $command ) = @_;
local ( $res ) = 1;
pipe(PARENT_READER, CHILD_WRITER);
# We have to fork (as opposed to using "system") so that the parent
# process can read from the pipe to avoid deadlock.
my ($pid) = fork;
if ($pid == 0) { # child
close(PARENT_READER);
open(STDERR, ">&CHILD_WRITER");
exec($command);
die("no exec");
}
if ($pid > 0) { # parent
close( CHILD_WRITER );
if ($listp) {
@dialog_result = ();
while (<PARENT_READER>) {
chop;
$dialog_result[@dialog_result] = $_;
}
}
else { $dialog_result = <PARENT_READER>; }
close(PARENT_READER);
waitpid($pid,0);
$res = $?;
}
# Again, dialog returns results backwards
if (! $res) {
return 1;
} else {
return 0;
}
}
sub rhs_wordwrap {
local ( $intext, $width ) = @_;
local ( $outtext, $i, $j, @lines, $wrap, @words, $pos, $pad );
$outtext = "";
$pad = 3; # leave 3 spaces around each line
$pos = $pad; # current insert position
$wrap = 0; # 1 if we have been auto wraping
$insert_nl = 0; # 1 if we just did an absolute
# and we should preface any new text
# with a new line
@lines = split(/\n/, $intext);
for ($i = 0; $i <= $#lines; $i++) {
if ($lines[$i] =~ /^>/) {
$outtext .= "\n" if ($insert_nl);
$outtext .= "\n" if ($wrap);
$lines[$i] =~ /^>(.*)$/;
$outtext .= $1;
$insert_nl = 1;
$wrap = 0;
$pos = $pad;
} else {
$wrap = 1;
@words = split(/\s+/,$lines[$i]);
for ($j = 0; $j <= $#words; $j++) {
if ($insert_nl) {
$outtext .= "\n";
$insert_nl = 0;
}
if ((length($words[$j]) + $pos) > $width - $pad) {
$outtext .= "\n";
$pos = $pad;
}
$outtext .= $words[$j] . " ";
$pos += length($words[$j]) + 1;
}
}
}
return $outtext;
}
############
1;
