=head1 ENVIRONMENT
-The variable C<PERL_RL> governs which ReadLine clone is loaded. If the
-value is false, a dummy interface is used. If the value is true, it
-should be tail of the name of the package to use, such as C<Perl> or
-C<Gnu>.
+The environment variable C<PERL_RL> governs which ReadLine clone is
+loaded. If the value is false, a dummy interface is used. If the value
+is true, it should be tail of the name of the package to use, such as
+C<Perl> or C<Gnu>.
-If the variable is not set, the best available package is loaded.
+As a special case, if the value of this variable is space-separated,
+the tail might be used to disable the ornaments by setting the tail to
+be C<o=0> or C<ornaments=0>. The head should be as described above, say
+
+If the variable is not set, or if the head of space-separated list is
+empty, the best available package is loaded.
+
+ export "PERL_RL=Perl o=0" # Use Perl ReadLine without ornaments
+ export "PERL_RL= o=0" # Use best available ReadLine without ornaments
+
+(Note that processing of C<PERL_RL> for ornaments is in the discretion of the
+particular used C<Term::ReadLine::*> package).
+
+=head1 CAVEATS
+
+It seems that using Term::ReadLine from Emacs minibuffer doesn't work
+quite right and one will get an error message like
+
+ Cannot open /dev/tty for read at ...
+
+One possible workaround for this is to explicitly open /dev/tty like this
+
+ open (FH, "/dev/tty" )
+ or eval 'sub Term::ReadLine::findConsole { ("&STDIN", "&STDERR") }';
+ die $@ if $@;
+ close (FH);
+
+or you can try using the 4-argument form of Term::ReadLine->new().
=cut
+use strict;
+
package Term::ReadLine::Stub;
-@ISA = qw'Term::ReadLine::Tk Term::ReadLine::TermCap';
+our @ISA = qw'Term::ReadLine::Tk Term::ReadLine::TermCap';
$DB::emacs = $DB::emacs; # To peacify -w
+our @rl_term_set;
*rl_term_set = \@Term::ReadLine::TermCap::rl_term_set;
sub ReadLine {'Term::ReadLine::Stub'}
sub readline {
my $self = shift;
my ($in,$out,$str) = @$self;
- print $out $rl_term_set[0], shift, $rl_term_set[1], $rl_term_set[2];
+ my $prompt = shift;
+ print $out $rl_term_set[0], $prompt, $rl_term_set[1], $rl_term_set[2];
$self->register_Tk
if not $Term::ReadLine::registered and $Term::ReadLine::toloop
and defined &Tk::DoOneEvent;
#$str = scalar <$in>;
$str = $self->get_line;
+ $str =~ s/^\s*\Q$prompt\E// if ($^O eq 'MacOS');
print $out $rl_term_set[3];
# bug in 5.000: chomping empty string creats length -1:
chomp $str if defined $str;
sub findConsole {
my $console;
- if (-e "/dev/tty") {
+ if ($^O eq 'MacOS') {
+ $console = "Dev:Console";
+ } elsif (-e "/dev/tty") {
$console = "/dev/tty";
} elsif (-e "con" or $^O eq 'MSWin32') {
$console = "con";
$console = "sys\$command";
}
- if ($^O eq 'amigaos') {
+ if (($^O eq 'amigaos') || ($^O eq 'beos') || ($^O eq 'epoc')) {
$console = undef;
}
elsif ($^O eq 'os2') {
}
}
- $consoleOUT = $console;
+ my $consoleOUT = $console;
$console = "&STDIN" unless defined $console;
if (!defined $consoleOUT) {
$consoleOUT = defined fileno(STDERR) ? "&STDERR" : "&STDOUT";
die "method new called with wrong number of arguments"
unless @_==2 or @_==4;
#local (*FIN, *FOUT);
- my ($FIN, $FOUT);
+ my ($FIN, $FOUT, $ret);
if (@_==2) {
- ($console, $consoleOUT) = findConsole;
+ my($console, $consoleOUT) = $_[0]->findConsole;
open(FIN, "<$console");
open(FOUT,">$consoleOUT");
#OUT->autoflush(1); # Conflicts with debugger?
- $sel = select(FOUT);
+ my $sel = select(FOUT);
$| = 1; # for DB::OUT
select($sel);
- bless [\*FIN, \*FOUT];
+ $ret = bless [\*FIN, \*FOUT];
} else { # Filehandles supplied
$FIN = $_[2]; $FOUT = $_[3];
#OUT->autoflush(1); # Conflicts with debugger?
- $sel = select($FOUT);
+ my $sel = select($FOUT);
$| = 1; # for DB::OUT
select($sel);
- bless [$FIN, $FOUT];
+ $ret = bless [$FIN, $FOUT];
+ }
+ if ($ret->Features->{ornaments}
+ and not ($ENV{PERL_RL} and $ENV{PERL_RL} =~ /\bo\w*=0/)) {
+ local $Term::ReadLine::termcap_nowarn = 1;
+ $ret->ornaments(1);
}
+ return $ret;
}
sub newTTY {
package Term::ReadLine; # So late to allow the above code be defined?
-my $which = $ENV{PERL_RL};
+our $VERSION = '1.00';
+
+my ($which) = exists $ENV{PERL_RL} ? split /\s+/, $ENV{PERL_RL} : undef;
if ($which) {
if ($which =~ /\bgnu\b/i){
eval "use Term::ReadLine::Gnu;";
} else {
eval "use Term::ReadLine::$which;";
}
-} elsif (defined $which) { # Defined but false
+} elsif (defined $which and $which ne '') { # Defined but false
# Do nothing fancy
} else {
eval "use Term::ReadLine::Gnu; 1" or eval "use Term::ReadLine::Perl; 1";
# To make possible switch off RL in debugger: (Not needed, work done
# in debugger).
-
+our @ISA;
if (defined &Term::ReadLine::Gnu::readline) {
@ISA = qw(Term::ReadLine::Gnu Term::ReadLine::Stub);
} elsif (defined &Term::ReadLine::Perl::readline) {
# Prompt-start, prompt-end, command-line-start, command-line-end
# -- zero-width beautifies to emit around prompt and the command line.
-@rl_term_set = ("","","","");
+our @rl_term_set = ("","","","");
# string encoded:
-$rl_term_set = ',,,';
+our $rl_term_set = ',,,';
+our $terminal;
sub LoadTermCap {
return if defined $terminal;
return $rl_term_set unless @_;
$rl_term_set = shift;
$rl_term_set ||= ',,,';
- $rl_term_set = 'us,ue,md,me' if $rl_term_set == 1;
+ $rl_term_set = 'us,ue,md,me' if $rl_term_set eq '1';
my @ts = split /,/, $rl_term_set, 4;
eval { LoadTermCap };
- warn("Cannot find termcap: $@\n"), return unless defined $terminal;
+ unless (defined $terminal) {
+ warn("Cannot find termcap: $@\n") unless $Term::ReadLine::termcap_nowarn;
+ $rl_term_set = ',,,';
+ return;
+ }
@rl_term_set = map {$_ ? $terminal->Tputs($_,1) || '' : ''} @ts;
return $rl_term_set;
}
package Term::ReadLine::Tk;
+our($count_handle, $count_DoOne, $count_loop);
$count_handle = $count_DoOne = $count_loop = 0;
+our($giveup);
sub handle {$giveup = 1; $count_handle++}
sub Tk_loop {
my $self = shift;
$self->Tk_loop if $Term::ReadLine::toloop && defined &Tk::DoOneEvent;
my $in = $self->IN;
+ local ($/) = "\n";
return scalar <$in>;
}