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comparison Lib/IMPL/Object/EventSource.pm @ 0:03e58a454b20

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Создан репозитарий
author Sergey
date Tue, 14 Jul 2009 12:54:37 +0400
parents
children 94d47b388442
comparison
equal deleted inserted replaced
-1:000000000000 0:03e58a454b20
1 package IMPL::Object::EventSource;
2 use strict;
3 require IMPL::Exception;
4 use IMPL::Class::Property;
5
6 sub CreateEvent {
7 my ($class,$event) = @_;
8
9 die new IMPL::Exception('A name is required for the event') unless $event;
10
11 (my $fullEventName = "$class$event") =~ s/:://g;
12
13 my $globalEventTable = new IMPL::Object::EventSource::EventTable($fullEventName);
14 my $propEventTable = $event.'Table';
15 public CreateProperty($class,$propEventTable,prop_all);
16 public CreateProperty($class,$event,
17 {
18 get => sub {
19 my $this = shift;
20 if (not defined wantarray and caller(1) eq $class) {
21 (ref $this ? $this->$propEventTable() || $globalEventTable : $globalEventTable)->Invoke($this);
22 } else {
23 if (ref $this) {
24 if (my $table = $this->$propEventTable()) {
25 return $table;
26 } else {
27 $table = new IMPL::Object::EventSource::EventTable($fullEventName,$globalEventTable);
28 $this->$propEventTable($table);
29 return $table;
30 }
31 } else {
32 return $globalEventTable;
33 }
34 }
35 },
36 set => sub {
37 (ref $_[0] ? $_[0]->$propEventTable() || $globalEventTable : $globalEventTable)->Invoke(@_);
38 }
39 }
40 );
41 }
42
43 sub CreateStaticEvent {
44 my ($class,$event) = @_;
45
46 die new IMPL::Exception('A name is required for the event') unless $event;
47
48 (my $fullEventName = "$class$event") =~ s/:://g;
49
50 my $globalEventTable = new IMPL::Object::EventSource::EventTable($fullEventName);
51
52 no strict 'refs';
53 *{"${class}::$event"} = sub {
54 my $class = shift;
55 if (not @_) {
56 if (not defined wantarray and caller(1) eq $class) {
57 $globalEventTable->Invoke($class);
58 } else {
59 return $globalEventTable;
60 }
61 } else {
62 $globalEventTable->Invoke(@_);
63 }
64 };
65 }
66
67 package IMPL::Object::EventSource::EventTable;
68 use base qw(IMPL::Object);
69 use IMPL::Class::Property;
70 use IMPL::Class::Property::Direct;
71 use Scalar::Util qw(weaken);
72
73 use overload
74 '+=' => \&opSubscribe,
75 'fallback' => 1;
76
77 BEGIN {
78 public _direct property Name => prop_get;
79 public _direct property Handlers => { get => \&get_handlers };
80 private _direct property Next => prop_all;
81 private _direct property NextId => prop_all;
82 }
83
84 sub CTOR {
85 my $this = shift;
86 $this->SUPER::CTOR();
87
88 $this->{$Handlers} = {};
89 $this->{$Name} = shift;
90 $this->{$Next} = shift;
91 $this->{$NextId} = 1;
92 }
93
94 sub get_handlers {
95 my $this = shift;
96 return values %{$this->{$Handlers}};
97 }
98
99 sub Invoke {
100 my $this = shift;
101
102 my $tmp;
103 $tmp = $_ and local($_) or &$tmp(@_) foreach values %{$this->{$Handlers}};
104
105 $this->{$Next}->Invoke(@_) if $this->{$Next};
106 }
107
108 sub Subscribe {
109 my ($this,$consumer,$nameHandler) = @_;
110
111 my $id = $this->{$NextId} ++;
112
113 if (ref $consumer eq 'CODE') {
114 $this->{$Handlers}{$id} = $consumer;
115 } else {
116 $nameHandler ||= $this->Name or die new IMPL::Exception('The name for the event handler method must be specified');
117 my $method = $consumer->can($nameHandler) or die new IMPL::Exception('Can\'t find the event handler method',$nameHandler,$consumer);
118
119 weaken($consumer) if ref $consumer;
120 $this->{$Handlers}{$id} = sub {
121 unshift @_, $consumer;
122 $consumer ? goto &$method : delete $this->{$Handlers}{$id};
123 };
124 }
125
126 return $id;
127 }
128
129 sub Remove {
130 my ($this,$id) = @_;
131 return delete $this->{$Handlers}{$id};
132 }
133 1;