zenity/src/gdialog.in

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2003-05-27 22:00:43 +00:00
#!@PERL@
# gdialog -> zenity conversion wrapper
#
# by Mike Newman <mikegtn@gnome.org>
#
# This is all, of course, horrible - but it should translate
# most commond gdialog types to zenity equivalents. It will mostly drop
# the pointless and unused (even by gdialog!) size arguments
# but hopefully will translate all the others.
#
# For testing purposes, I've used a couple of the nautilus scripts
# available at http://g-scripts.sourceforge.net - what is sometimes
# unclear is what is a gdialog/zenity translation problem, and what is
# a problem with the original script
my @command = ("zenity"); # the command line we build up to execute
my $element = ""; # current bit of command line
my $argn = 0; # counter for walking args
my $args = $#ARGV + 1; # total number of command line arguments
my $separator = 0; # set if --separate-output is in use
# Additon by: Kevin C. Krinke (kck) <kckrinke@opendoorsoftware.com>
#
# gdialog itself supports both the X-Windows interface as well as a console
# interface. Here's a fix to use regular dialog when appropriate.
# This should probably be a more advanced test of some sort, but I don't know
# of any other easy way of detecting and X-Windows environment. If someone does
# know better, please let me know. So for now this works: "no DISPLAY; no X".
unless (defined $ENV{'DISPLAY'} && length($ENV{'DISPLAY'})) {
# reset the command string
@command = ();
# examine all the available/default paths
my $PATHS = ($ENV{'PATH'}||'/bin:/usr/bin:/usr/local/bin:/opt/bin');
BIN: foreach my $PATH (split(/\:/,$PATHS)) {
if (-x $PATH."/gdialog.real") {
# Some GNU/Linux distributions divert binaries when
# other packages are installed. If this exists, chances
# are it's the real gdialog and not the Zenity wrapper.
# gdialog has full support for the Console medium and
# as such is the preference over using the "regular"
# dialog interface.
@command = ($PATH."/gdialog.real");
last BIN;
} elsif (-x $PATH."/dialog") {
# change the command and skip ahead!
@command = ($PATH."/dialog");
last BIN;
}
}
unless (@command) {
# we didn't find the dialog binary, exit(254) with a message
# to STDERR.
print STDERR "missing DISPLAY and a console dialog could".
" not be found.\n";
# exit code 254 is used because 255, 1, 2, 3 are used by Zenity
# and cDialog. This error, is a very _bad_ error so it's semi-
# non-standard at 254.
exit(254);
}
# all is well if we've made it this far
# so join the arguments double-quoting things so that proper shell
# notation is saved.
push @command, @ARGV;
# and fork the process
exec(@command);
}
# Got DISPLAY, has X continue as normal...
# End Addtition by: KCK
# this just loads the current arg into $element
sub get_arg () {
$element = $ARGV[$argn];
}
# walk the command line
ARG: while ($argn < $args) {
get_arg;
# Informational stuff
if ($element eq "--help" || $element eq "--about") {
print ( "gdialog is a compatibility wrapper around zenity, " .
"provided to hopefully\nallow older scripts to run. " .
"If you are reading this message, you should\n" .
"probably be using zenity directly\n\n" .
"type: 'zenity --help' or 'man zenity' for more information\n");
exit (1);
}
# Section 1 : Args which gdialog expects BEFORE box options
# --clear, --backtitle have no obvious effect - ignored
if ($element eq "--title") {
# --title argument is almost analogous in gdialog and
# zenity - so pass it almost entirely as is
$argn++;
get_arg;
push @command, "--title=$element";
# keep processing args
$argn++;
next ARG;
}
if ($element eq "--separate-output") {
# set the flag to pring list output line by line
$separator = 1;
# keep processing args
$argn++;
next ARG;
}
# Section 2 : Box Options and subsequent args
if ($element eq "--msgbox" || $element eq "--infobox") {
# This bit is common to almost all of the dialogs
# the arg following the dialog type in gdialog is usually
# equivalent to zenity's --text arg.
$argn++;
get_arg;
push @command, "--info", "--text=$element";
# this also happens a lot - gdialog accepted size args
# for dialog compatability - which it pretty much ignored
# and we will do the same
$argn+=2;
last ARG;
}
if ($element eq "--yesno") {
# this will silently ignore the gdialog option to set
# the default button in question dialogs - which is
# highly hig-norant anyway!
$argn++;
get_arg;
push @command, "--question", "--text=$element";
last ARG;
}
if ($element eq "--inputbox") {
$argn++;
get_arg;
push @command, "--entry", "--text=$element";
# ignore size elements and maybe there is some
# default text to initialize the entry with?
$argn+=3;
get_arg;
push @command, "--entry-text=$element";
last ARG;
}
if ($element eq "--textbox") {
push @command, "--text-info";
# the arg immediately following the dialog type in
# gdialog is the filename, so pass this to zenity
$argn++;
get_arg;
push @command, "--filename=$element";
# width and height matter for this one, so get them
# and apply the same multipliers as used in gdialog
$argn++;
get_arg;
$element = $element * 7;
push @command, "--height=$element";
$argn++;
get_arg;
$element = $element * 8;
push @command, "--width=$element";
last ARG;
}
if ($element eq "--checklist" || $element eq "--radiolist") {
$list=$element;
$argn++;
get_arg;
# Conveniently, zenity and gdialog use the same names
# for list types, so pass this to zenity intact along with
# an untitled column for the check or radio buttons
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# and the 'text' arg as a second column header
push @command, "--list", $list, "--column=''", "--column=''", "--column", $element;
# should output be line by line?
if ($separator) {
push @command, "--separator=\n";
}
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# Skip to the first 'item' arg of the list content
# bypassing height, width and list-height
# from here args run [tag] [item] [status] ...
$argn += 4;
# Loop over the remainder of the commandline
# discarding the 'status' args of each item
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# and using the 'item' for display in our second column
# also pass a fake NULL argument since zenity can't set
# the status of a row like gdialog can
while ($argn < $args) {
get_arg;
push @command, "NULL", $element;
$argn += 1;
get_arg;
push @command, $element;
$argn += 2;
}
last ARG;
}
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if ($element eq "--menu") {
$list=$element;
$argn++;
get_arg;
# a gdialog --menu is just a two column zenity --list
# Leave the first column blank (not provided)
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# Use the 'text' arg as a second column header
# FIXME: or should it be the dialog text, or both?
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push @command, "--list", "--column", "", "--column", $element;
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# Skip to the first 'item' arg of the list content
# after using height, width and bypassing list-height
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# from here args run [tag] [item] ...
$argn += 1;
get_arg;
# Height and width in characters to be displayed, so adjust
# cdialog uses 6 height for non-list, zenity uses ~24 pixels
# per list entry (default font), and 103 pixels for non-list
# This appears to be almost exact
$element = $element*24 - 35;
push @command, "--height", $element;
$argn += 1;
get_arg;
# cdialog uses 6 width for non-list, zenity uses ~7 pixels
# per character (default font), and 22 pixels for non-list
# This is not exact, but close enough
$element = $element*7 - 20;
push @command, "--width", $element;
$argn += 2;
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# Loop over the remainder of the commandline
# keeping 'tag' args of each item (required to return)
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# and using the 'item' for display in our second column
while ($argn < $args) {
get_arg;
push @command, $element;
$argn += 1;
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}
last ARG;
}
if ($element eq "--gauge") {
$argn++;
get_arg;
push @command, "--progress", "--text=$element";
# discard the size args as usually, and see if
# a percentage value was supplied to initialize the
# dialog
$argn += 3;
get_arg;
if ($element) {
push @command, "--percentage=$element";
}
last ARG;
}
$argn++;
}
# save STDOUT and STDERR
open(ORG_STDOUT, ">&STDOUT");
open(ORG_STDERR, ">&STDERR");
# redirect STDERR to /dev/null (GTK messages ie:
# (zenity:637): Gtk-WARNING **: Unable to locate theme engine in module_path: "mist",)
open(STDERR, ">/dev/null");
# redirect STDOUT to STDERR (gdialog direct output to STDERR by default)
open(STDOUT, ">&ORG_STDERR");
# execute the constructed zenity command line
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# perl doc: The return value of system() is the exit status of the
#program as returned by the wait() call. To get the actual exit value
# divide by 256.
my $return = system(@command)/256;
# restore STDOUT and STDERR
open(STDOUT, ">&ORG_STDOUT");
open(STDERR, ">&ORG_STDERR");
close(ORG_STDOUT);
close(ORG_STDERR);
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exit $return;