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#!/usr/bin/perl |
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## |
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## POE::Component::Terminal -- Terminal Component |
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## |
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## $Id: Terminal.pm,v 1.8 2002/06/15 08:08:51 cvsjoko Exp $ |
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## |
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## $Log: Terminal.pm,v $ |
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## Revision 1.8 2002/06/15 08:08:51 cvsjoko |
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## + modifications in Term::ReadKey behaviour |
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## |
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## Revision 1.7 2002/06/15 07:56:40 cvsjoko |
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## + bugfixes for win32 (additional keys) |
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## |
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## Revision 1.6 2002/06/15 07:46:11 cvsjoko |
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## + bugfixes for linux |
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## |
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## Revision 1.5 2002/06/15 05:19:36 cvsjoko |
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## + modified order/way of key-handling-logic |
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## |
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## Revision 1.4 2002/06/15 04:28:10 cvsjoko |
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## immediate polling, no delay |
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## |
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## Revision 1.3 2002/06/15 04:24:15 cvsjoko |
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## + added modifier for running in linux or win32 |
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## + modified order of some commands in core key-polling |
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## |
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## Revision 1.2 2002/06/15 03:45:21 cvsjoko |
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## + cvs id & log |
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## + clearing inputbuffer just after getting the "enter"-key |
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## |
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## |
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package POE::Component::Terminal; |
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|
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use strict; |
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#use strict qw ( vars refs ); |
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use warnings; |
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|
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|
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use Carp qw( croak carp ); |
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|
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use POE; |
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|
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use Term::ReadKey; |
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use Data::Dumper; |
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|
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$POE::Component::Terminal::VERSION = 0.01; |
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|
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my @args_needed = qw ( |
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Alias |
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Caption |
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PromptPrefix |
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PromptPostfix |
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RequestSession |
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RequestState |
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ResponseSession |
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ResponseState |
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PromptChangeState |
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); |
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|
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my $states = { |
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_start => 'start', |
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_stop => 'stop', |
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_signal => 'signal', |
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_default => 'default', |
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pollForKey => 'pollForKey', |
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recievePrompt => 'recievePrompt', |
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recieveResponse => 'recieveResponse', |
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}; |
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|
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sub RUNNING_IN_HELL () { $^O eq 'MSWin32' } |
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|
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sub new { |
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my $class = shift; |
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$class = ref( $class ) || $class; |
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#my( %args ) = ( %default_args, @_ ); |
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my $args = shift; |
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|
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# bless class into object ($self) |
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my $self = bless {}, $class; |
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|
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## Check args |
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foreach my $arg_needed (@args_needed) { |
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croak "Need $arg_needed argument." |
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unless exists $args->{ $arg_needed }; |
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} |
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|
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# store entries from args to object ($self) |
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map { $self->{$_} = $args->{$_}; } keys %{$args}; |
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|
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if ( RUNNING_IN_HELL () ) { |
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$self->{conf}{KeyEnter} = 13; |
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$self->{conf}{KeyBackspace} = 8; |
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$self->{conf}{KeyCTRLC} = 3; |
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} else { |
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$self->{conf}{KeyEnter} = 10; |
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$self->{conf}{KeyBackspace} = 127; |
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$self->{conf}{KeyCTRLC} = 3; |
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} |
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|
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## Make our session. See $states defined up above . . . |
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POE::Session->create( object_states => [ $self => $states, ], ); |
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|
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return $self; |
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} |
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|
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## |
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## start -- Startup state |
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## |
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sub start { |
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my( $self, $kernel, $heap, $session, $sender ) = |
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@_[ OBJECT, KERNEL, HEAP, SESSION, SENDER ]; |
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|
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## Pipe up if we're debugging |
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print STDERR "## ", __PACKAGE__, "::start\r\n" if $self->{Debug}; |
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|
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## Set the alias requested so we can be post'd to |
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$kernel->alias_set( $self->{Alias} ); |
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|
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## Remember session that created us for posting DispatchEvent |
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$self->{ _target } = $sender; |
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|
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$heap->{state}{InputBuffer} = ''; |
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$heap->{state}{Startup} = 1; |
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$heap->{state}{Caption} = $self->{Caption}; |
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$heap->{state}{KeyPressed} = 0; |
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$heap->{state}{RequestPending} = 0; |
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|
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# initially call worker-state |
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ReadMode 4; |
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$kernel->post($session, "pollForKey"); |
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|
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return; |
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} |
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|
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## |
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## stop -- Shutdown state |
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## |
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sub stop { |
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my( $self, $kernel, $heap ) = @_[ OBJECT, KERNEL, HEAP ]; |
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|
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## Just pipe up if we're debugging |
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print STDERR "## ", __PACKAGE__, "::stop\r\n" if $self->{_debug}; |
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|
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return |
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} |
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|
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## |
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## signal -- Handle any signals received |
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## |
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sub signal { |
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my( $self, $heap, $signal ) = @_[ OBJECT, HEAP, ARG0 ]; |
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|
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## Just pipe up if we're debugging |
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print STDERR "## ", __PACKAGE__, "::signal $signal\n" if $self->{_debug}; |
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|
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## shut things down on TERM, QUIT, or INT |
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if( $signal =~ /^TERM|QUIT|INT/ ) { |
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delete $heap->{wheel}; # toss our listening wheel reference |
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|
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## Check for child wheels |
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my $live_wheels = scalar keys %{$heap->{wheels}}; |
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if( $live_wheels ) { |
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print STDERR "Exiting with $live_wheels clients still active\n" |
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if $self->{_debug}; |
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delete $heap->{wheels}; |
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} |
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} |
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|
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return |
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} |
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|
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## |
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## default -- Catch any unhandled events for debugging |
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## |
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sub default { |
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my( $self, $heap, $event ) = @_[ OBJECT, HEAP, ARG0 ]; |
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|
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## Just pipe up if we're debugging |
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print STDERR "## ", __PACKAGE__, "::default got $event\n" |
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if $self->{_debug}; |
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|
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return |
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} |
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|
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|
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|
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|
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|
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|
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|
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# ================ POE stuff |
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|
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sub pollForKey { |
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my ($self, $kernel, $heap, $session) = @_[OBJECT, KERNEL, HEAP, SESSION ]; |
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|
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my $prompt_inlay = $heap->{state}{PromptInlay}; |
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if ($prompt_inlay) { $prompt_inlay .= ' '; } else { $prompt_inlay = ''; } |
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|
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my $prompt = "#> "; |
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$prompt = $self->{PromptPrefix} . ' ' . $prompt_inlay . $self->{PromptPostfix}; |
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|
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if ( ( |
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( $heap->{state}{KeyPressed} == 1 ) && |
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( $heap->{state}{RequestPending} == 0 ) |
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) || |
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( $heap->{state}{Startup} ) |
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) { |
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$heap->{state}{Startup} = 0; |
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$heap->{state}{KeyPressed} = 0; |
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my $outputline = $prompt . $heap->{state}{InputBuffer}; |
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my $s = ' ' x (length($outputline) + 1); |
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print "\r", $s; |
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print "\r", $outputline; |
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#print $outputline; |
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} |
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|
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my $key = ReadKey(-1); |
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if ( defined $key ) { |
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|
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#print "key: ", ord($key), "\n"; |
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|
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# CTRL+C pressed? |
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if (ord($key) == $self->{conf}{KeyCTRLC}) { |
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ReadMode 1; |
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print "\n"; |
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exit; |
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} |
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|
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# enter pressed? |
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if (ord($key) == $self->{conf}{KeyEnter}) { |
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|
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# if enter was pressed while request was pending, |
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# we should stop waiting for output and come back to prompt again, |
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if ($heap->{state}{RequestPending}) { |
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$kernel->post( $self->{ResponseSession} => $self->{ResponseState} => ' < stopped waiting for response'); |
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} |
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|
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# send command, if buffer is filled |
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my $buf = $heap->{state}{InputBuffer}; |
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if ($buf) { |
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$heap->{state}{InputBuffer} = ''; |
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$heap->{state}{RequestPending} = 1; |
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my $response_target = { |
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ResponseSession => $self->{ResponseSession}, |
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ResponseState => $self->{ResponseState}, |
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}; |
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$kernel->post( $self->{RequestSession} => $self->{RequestState} => $buf, $response_target); |
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} |
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|
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# prepare new loop for fresh prompt |
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print "\n"; |
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|
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} |
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|
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# backspace pressed? |
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elsif (ord($key) == $self->{conf}{KeyBackspace}) { |
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$heap->{state}{InputBuffer} = substr($heap->{state}{InputBuffer}, 0, -1); |
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} |
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# unknown key? |
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elsif (ord($key) == 0) { |
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} |
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|
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# normal key? |
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#elsif ($key =~ m/[a-zA-Z? ]/) { |
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else { |
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$heap->{state}{InputBuffer} .= $key; |
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#print $key; |
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} |
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|
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# mark "KeyPressed" for next poll |
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$heap->{state}{KeyPressed} = 1; |
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|
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} |
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|
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$kernel->post($session, "pollForKey"); |
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#$kernel->run_one_timeslice(); |
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#$kernel->post($session, "pollForKey"); |
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#$kernel->yield($session, "pollForKey"); |
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#$kernel->delay("pollForKey", 0.1); |
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#$kernel->delay("pollForKey", 0.001); |
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|
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} |
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|
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|
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|
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|
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sub recieveResponse { |
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my ($kernel, $heap, $session, $response) = @_[KERNEL, HEAP, SESSION, ARG0]; |
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if ($response) { |
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print $response, "\n"; |
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$heap->{state}{RequestPending} = 0; |
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} |
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} |
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sub recievePrompt { |
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my ($kernel, $heap, $session, $prompt_inlay) = @_[KERNEL, HEAP, SESSION, ARG0]; |
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$heap->{state}{PromptInlay} = $prompt_inlay; |
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} |
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|
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|
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