POE/Component/Terminal.pm

#!/usr/bin/perl
##
## POE::Component::Terminal -- Terminal Component
##
## $Id: Terminal.pm,v 1.2 2002/06/15 03:45:21 cvsjoko Exp $
##
## $Log: Terminal.pm,v $
## Revision 1.2  2002/06/15 03:45:21  cvsjoko
## + cvs id & log
## + clearing inputbuffer just after getting the "enter"-key
##
##
package POE::Component::Terminal;

use strict;
#use strict qw ( vars refs );
use warnings;


use Carp qw( croak carp );

use POE;

use Term::ReadKey;
use Data::Dumper;

$POE::Component::Terminal::VERSION = 0.01;

my @args_needed = qw (
        Alias
        Caption
        PromptPrefix
        PromptPostfix
        RequestSession
        RequestState
        ResponseSession
        ResponseState
        PromptChangeState
);

my $states = {
              _start       => 'start',
              _stop        => 'stop',
              _signal      => 'signal',
              _default     => 'default',
          pollForKey => 'pollForKey',
          recievePrompt => 'recievePrompt',
          recieveResponse => 'recieveResponse',
             };

sub RUNNING_IN_HELL () { $^O eq 'MSWin32' }

sub new {
  my $class = shift;
  $class = ref( $class ) || $class;
  #my( %args ) = ( %default_args, @_ );
  my $args = shift;

  # bless class into object ($self)
  my $self = bless {}, $class;

  ## Check args
  foreach my $arg_needed (@args_needed) {
    croak "Need $arg_needed argument." 
      unless exists $args->{ $arg_needed };
  }

  # store entries from args to object ($self)
  map { $self->{$_} = $args->{$_}; } keys %{$args};

  if ( RUNNING_IN_HELL () ) {
    $self->{conf}{EnterKey} = "\r";
  } else {
    $self->{conf}{EnterKey} = "\n";
  }

  ## Make our session.  See $states defined up above . . .
  POE::Session->create( object_states => [ $self => $states, ], );

  return $self;
}

##
## start -- Startup state
##
sub start {
  my( $self, $kernel, $heap, $session, $sender ) =
    @_[ OBJECT, KERNEL, HEAP, SESSION, SENDER ];

  ## Pipe up if we're debugging
  print STDERR "## ", __PACKAGE__, "::start\r\n" if $self->{Debug};

  ## Set the alias requested so we can be post'd to
  $kernel->alias_set( $self->{Alias} );

  ## Remember session that created us for posting DispatchEvent
  $self->{ _target } = $sender;

  $heap->{state}{InputBuffer} = '';
  $heap->{state}{Startup} = 1;
  $heap->{state}{Caption} = $self->{Caption};
  
  # initially call worker-state
  $kernel->post($session, "pollForKey");

  return;
}

##
## stop -- Shutdown state
##
sub stop {
  my( $self, $kernel, $heap ) = @_[ OBJECT, KERNEL, HEAP ];

  ## Just pipe up if we're debugging
  print STDERR "## ", __PACKAGE__, "::stop\r\n" if $self->{_debug};

  return
}

##
## signal -- Handle any signals received
##
sub signal {
  my( $self, $heap, $signal ) = @_[ OBJECT, HEAP, ARG0 ];

  ## Just pipe up if we're debugging
  print STDERR "## ", __PACKAGE__, "::signal $signal\n" if $self->{_debug};

  ## shut things down on TERM, QUIT, or INT
  if( $signal =~ /^TERM|QUIT|INT/ ) {
    delete $heap->{wheel};      # toss our listening wheel reference

    ## Check for child wheels
    my $live_wheels = scalar keys %{$heap->{wheels}};
    if( $live_wheels ) {
      print STDERR "Exiting with $live_wheels clients still active\n"
        if $self->{_debug};
      delete $heap->{wheels};
    }
  }

  return
}

##
## default -- Catch any unhandled events for debugging
##
sub default {
  my( $self, $heap, $event ) = @_[ OBJECT, HEAP, ARG0 ];

  ## Just pipe up if we're debugging
  print STDERR "## ", __PACKAGE__, "::default got $event\n"
    if $self->{_debug};

  return
}


# ================ POE stuff

sub pollForKey {

  my ($self, $kernel, $heap, $session) = @_[OBJECT, KERNEL, HEAP, SESSION ];

  my $prompt_inlay = $heap->{state}{PromptInlay};
  if ($prompt_inlay) { $prompt_inlay .= ' '; } else { $prompt_inlay = ''; }

  my $prompt = "#> ";
  $prompt = $self->{PromptPrefix} . ' ' . $prompt_inlay . $self->{PromptPostfix};

  if ( ($heap->{state}{KeyPressed} && !$heap->{state}{RequestPending}) || ($heap->{state}{Startup}) ) {
    $heap->{state}{Startup} = 0;
    $heap->{state}{KeyPressed} = 0;
    #ReadMode 4; # Turn off controls keys
    #ReadMode 1;
    #print $prompt;
    my $outputline = $prompt . $heap->{state}{InputBuffer};
    my $s = ' ' x (length($outputline) + 1);
    print "\r", $s;
    print "\r", $outputline;
  }

  my $key = ReadKey(-1);
  if ($key) {
    
    # normal key?
    if ($key =~ m/[a-zA-Z? ]/) {
      $heap->{state}{InputBuffer} .= $key;
      #print $key;
    }

    # enter pressed?
    if ($key eq $self->{conf}{EnterKey}) {
      # send command
      my $buf = $heap->{state}{InputBuffer};
      if ($buf) {
        $heap->{state}{InputBuffer} = '';
        $heap->{state}{RequestPending} = 1;
        #print "ord: ", ord($buf), "\n";
        my $response_target = {
          ResponseSession => $self->{ResponseSession},
          ResponseState => $self->{ResponseState},
        };
        $kernel->post( $self->{RequestSession} => $self->{RequestState} => $buf, $response_target);
      }

      # prepare new loop for fresh prompt
      print "\n";
    }

    # backspace pressed?
    if (ord($key) == 8) {
      $heap->{state}{InputBuffer} = substr($heap->{state}{InputBuffer}, 0, -1);
    }

    # mark "KeyPressed" for next poll
    $heap->{state}{KeyPressed} = 1;

  }

  #$kernel->post($session, "pollForKey");
  #$kernel->delay("pollForKey", 0.1);
  $kernel->delay("pollForKey", 0.01);

}


sub recieveResponse {
  my ($kernel, $heap, $session, $response) = @_[KERNEL, HEAP, SESSION, ARG0];
  if ($response) { print $response, "\n"; }
  $heap->{state}{RequestPending} = 0;
}
sub recievePrompt {
  my ($kernel, $heap, $session, $prompt_inlay) = @_[KERNEL, HEAP, SESSION, ARG0];
  $heap->{state}{PromptInlay} = $prompt_inlay;
}


1;
1	cvsjoko	1.1	#!/usr/bin/perl
2			##
3			## POE::Component::Terminal -- Terminal Component
4			##
5	cvsjoko	1.3	## $Id: Terminal.pm,v 1.2 2002/06/15 03:45:21 cvsjoko Exp $
6			##
7			## $Log: Terminal.pm,v $
8			## Revision 1.2 2002/06/15 03:45:21 cvsjoko
9			## + cvs id & log
10			## + clearing inputbuffer just after getting the "enter"-key
11	cvsjoko	1.2	##
12	cvsjoko	1.1	##
13			package POE::Component::Terminal;
14
15			use strict;
16			#use strict qw ( vars refs );
17			use warnings;
18
19
20			use Carp qw( croak carp );
21
22			use POE;
23
24			use Term::ReadKey;
25			use Data::Dumper;
26
27			$POE::Component::Terminal::VERSION = 0.01;
28
29			my @args_needed = qw (
30			Alias
31			Caption
32			PromptPrefix
33			PromptPostfix
34			RequestSession
35			RequestState
36			ResponseSession
37			ResponseState
38			PromptChangeState
39			);
40
41			my $states = {
42			_start => 'start',
43			_stop => 'stop',
44			_signal => 'signal',
45			_default => 'default',
46			pollForKey => 'pollForKey',
47			recievePrompt => 'recievePrompt',
48			recieveResponse => 'recieveResponse',
49			};
50
51	cvsjoko	1.3	sub RUNNING_IN_HELL () { $^O eq 'MSWin32' }
52
53	cvsjoko	1.1	sub new {
54			my $class = shift;
55			$class = ref( $class ) \|\| $class;
56			#my( %args ) = ( %default_args, @_ );
57			my $args = shift;
58
59			# bless class into object ($self)
60			my $self = bless {}, $class;
61
62			## Check args
63			foreach my $arg_needed (@args_needed) {
64			croak "Need $arg_needed argument."
65			unless exists $args->{ $arg_needed };
66			}
67
68			# store entries from args to object ($self)
69			map { $self->{$_} = $args->{$_}; } keys %{$args};
70
71	cvsjoko	1.3	if ( RUNNING_IN_HELL () ) {
72			$self->{conf}{EnterKey} = "\r";
73			} else {
74			$self->{conf}{EnterKey} = "\n";
75			}
76
77	cvsjoko	1.1	## Make our session. See $states defined up above . . .
78			POE::Session->create( object_states => [ $self => $states, ], );
79
80			return $self;
81			}
82
83			##
84			## start -- Startup state
85			##
86			sub start {
87			my( $self, $kernel, $heap, $session, $sender ) =
88			@_[ OBJECT, KERNEL, HEAP, SESSION, SENDER ];
89
90			## Pipe up if we're debugging
91			print STDERR "## ", __PACKAGE__, "::start\r\n" if $self->{Debug};
92
93			## Set the alias requested so we can be post'd to
94			$kernel->alias_set( $self->{Alias} );
95
96			## Remember session that created us for posting DispatchEvent
97			$self->{ _target } = $sender;
98
99			$heap->{state}{InputBuffer} = '';
100			$heap->{state}{Startup} = 1;
101			$heap->{state}{Caption} = $self->{Caption};
102
103			# initially call worker-state
104			$kernel->post($session, "pollForKey");
105
106			return;
107			}
108
109			##
110			## stop -- Shutdown state
111			##
112			sub stop {
113			my( $self, $kernel, $heap ) = @_[ OBJECT, KERNEL, HEAP ];
114
115			## Just pipe up if we're debugging
116			print STDERR "## ", __PACKAGE__, "::stop\r\n" if $self->{_debug};
117
118			return
119			}
120
121			##
122			## signal -- Handle any signals received
123			##
124			sub signal {
125			my( $self, $heap, $signal ) = @_[ OBJECT, HEAP, ARG0 ];
126
127			## Just pipe up if we're debugging
128			print STDERR "## ", __PACKAGE__, "::signal $signal\n" if $self->{_debug};
129
130			## shut things down on TERM, QUIT, or INT
131			if( $signal =~ /^TERM\|QUIT\|INT/ ) {
132			delete $heap->{wheel}; # toss our listening wheel reference
133
134			## Check for child wheels
135			my $live_wheels = scalar keys %{$heap->{wheels}};
136			if( $live_wheels ) {
137			print STDERR "Exiting with $live_wheels clients still active\n"
138			if $self->{_debug};
139			delete $heap->{wheels};
140			}
141			}
142
143			return
144			}
145
146			##
147			## default -- Catch any unhandled events for debugging
148			##
149			sub default {
150			my( $self, $heap, $event ) = @_[ OBJECT, HEAP, ARG0 ];
151
152			## Just pipe up if we're debugging
153			print STDERR "## ", __PACKAGE__, "::default got $event\n"
154			if $self->{_debug};
155
156			return
157			}
158
159
160
161
162
163
164
165			# ================ POE stuff
166
167			sub pollForKey {
168
169			my ($self, $kernel, $heap, $session) = @_[OBJECT, KERNEL, HEAP, SESSION ];
170
171			my $prompt_inlay = $heap->{state}{PromptInlay};
172			if ($prompt_inlay) { $prompt_inlay .= ' '; } else { $prompt_inlay = ''; }
173
174			my $prompt = "#> ";
175			$prompt = $self->{PromptPrefix} . ' ' . $prompt_inlay . $self->{PromptPostfix};
176
177			if ( ($heap->{state}{KeyPressed} && !$heap->{state}{RequestPending}) \|\| ($heap->{state}{Startup}) ) {
178			$heap->{state}{Startup} = 0;
179			$heap->{state}{KeyPressed} = 0;
180			#ReadMode 4; # Turn off controls keys
181			#ReadMode 1;
182			#print $prompt;
183			my $outputline = $prompt . $heap->{state}{InputBuffer};
184			my $s = ' ' x (length($outputline) + 1);
185			print "\r", $s;
186			print "\r", $outputline;
187			}
188
189			my $key = ReadKey(-1);
190			if ($key) {
191
192			# normal key?
193			if ($key =~ m/[a-zA-Z? ]/) {
194			$heap->{state}{InputBuffer} .= $key;
195			#print $key;
196			}
197
198			# enter pressed?
199	cvsjoko	1.3	if ($key eq $self->{conf}{EnterKey}) {
200	cvsjoko	1.1	# send command
201			my $buf = $heap->{state}{InputBuffer};
202			if ($buf) {
203	cvsjoko	1.2	$heap->{state}{InputBuffer} = '';
204	cvsjoko	1.1	$heap->{state}{RequestPending} = 1;
205			#print "ord: ", ord($buf), "\n";
206			my $response_target = {
207			ResponseSession => $self->{ResponseSession},
208			ResponseState => $self->{ResponseState},
209			};
210			$kernel->post( $self->{RequestSession} => $self->{RequestState} => $buf, $response_target);
211			}
212
213			# prepare new loop for fresh prompt
214			print "\n";
215			}
216
217			# backspace pressed?
218			if (ord($key) == 8) {
219			$heap->{state}{InputBuffer} = substr($heap->{state}{InputBuffer}, 0, -1);
220			}
221
222	cvsjoko	1.3	# mark "KeyPressed" for next poll
223			$heap->{state}{KeyPressed} = 1;
224
225	cvsjoko	1.1	}
226
227	cvsjoko	1.3	#$kernel->post($session, "pollForKey");
228			#$kernel->delay("pollForKey", 0.1);
229			$kernel->delay("pollForKey", 0.01);
230	cvsjoko	1.1
231			}
232
233
234
235
236			sub recieveResponse {
237			my ($kernel, $heap, $session, $response) = @_[KERNEL, HEAP, SESSION, ARG0];
238			if ($response) { print $response, "\n"; }
239			$heap->{state}{RequestPending} = 0;
240			}
241			sub recievePrompt {
242			my ($kernel, $heap, $session, $prompt_inlay) = @_[KERNEL, HEAP, SESSION, ARG0];
243			$heap->{state}{PromptInlay} = $prompt_inlay;
244			}
245
246
247			1;
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