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# File: $Source: /Users/clajac/cvsroot//Scripting/Scripting/Event.pm,v $ |
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# Author: $Author: clajac $ |
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# Date: $Date: 2003/07/21 10:10:05 $ |
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# Revision: $Revision: 1.5 $ |
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package Scripting::Event; |
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use strict; |
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use constant GLOBAL_NAMESPACE => "_Global"; |
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require Exporter; |
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our @ISA = qw(Exporter); |
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our @EXPORT = qw(); |
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our @EXPORT_OK = qw(GLOBAL_NAMESPACE); |
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our %EXPORT_TAGS = ( |
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constants => [qw(GLOBAL_NAMESPACE)], |
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); |
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my %Events; |
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sub new { |
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my $pkg = shift; |
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$pkg = ref $pkg || $pkg; |
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my %args = ( |
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namespace => GLOBAL_NAMESPACE, |
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@_, |
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); |
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my $self = bless { |
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}, $pkg; |
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return $self; |
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} |
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sub has_event { |
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my ($pkg, $ns, $event) = @_; |
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return exists $Events{"$ns/$event"}; |
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} |
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sub remove_event { |
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my ($pkg, $ns, $event) = @_; |
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delete $Events{"$ns/$event"}; |
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} |
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sub add_event { |
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my ($pkg, $ns, $event, $cb) = @_; |
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$Events{"$ns/$event"} = $cb; |
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} |
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sub invoke { |
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my $self = shift; |
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my ($ns, $event); |
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if(@_ == 1) { |
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$ns = GLOBAL_NAMESPACE; |
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$event = shift; |
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} elsif(@_ == 2) { |
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($ns, $event) = @_; |
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} else { |
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die "Bad number of arguments\n"; |
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} |
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return unless $self->has_event($ns, $event); |
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$Events{"$ns/$event"}->() |
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} |
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1; |