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package XML::Tiny::DOM::Element; |
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use strict; |
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use warnings; |
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use vars qw($VERSION $AUTOLOAD); |
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578
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use overload |
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'""' => sub { return shift()->_gettext(); }, |
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'eq' => sub { my $s = shift(); return $s->_compare('eq', @_) }, |
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'ne' => sub { my $s = shift(); return $s->_compare('ne', @_) }, |
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'lt' => sub { my $s = shift(); return $s->_compare('lt', @_) }, |
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'le' => sub { my $s = shift(); return $s->_compare('le', @_) }, |
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'gt' => sub { my $s = shift(); return $s->_compare('gt', @_) }, |
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'ge' => sub { my $s = shift(); return $s->_compare('ge', @_) }, |
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'cmp' => sub { my $s = shift(); return $s->_compare('cmp', @_) }, |
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'bool' => sub { 1 }, |
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3692
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; |
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$VERSION = '1.1'; |
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=head1 NAME |
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XML::Tiny::DOM::Element - an object representing an XML element |
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=head1 DESCRIPTION |
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This represents a single Eelement /E in an XML document that |
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was parsed using XML::Tiny::DOM. |
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30
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=head1 SYNOPSIS |
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32
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use XML::Tiny::DOM; |
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my $document = XML::Tiny::DOM->new(...); |
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# $document is now an XML::Tiny::DOM::Element |
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36
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now, given a document like this: |
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39
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40
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41
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42
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-a |
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-q |
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46
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48
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49
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50
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51
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52
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53
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54
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55
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you can do this: |
56
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57
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my $rsync = $document->externalprograms->rsync(); |
58
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my $rsyncbinary = $rsync->binary(); |
59
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my $allrsyncargs = [ $rsync->args->arg('*') ]; |
60
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my $secondarg = $rsync->args->arg(1); |
61
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my $gamma = $document->intervals->interval('gamma'); |
62
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63
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=head1 METHODS |
64
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65
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=head2 created by AUTOLOAD |
66
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67
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Most methods are created using AUTOLOAD. There's also a few utility and |
68
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private methods whose names start with an underscore. Consequently |
69
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your documents shouldn't contain any elements or attributes whose names |
70
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start with an underscore, or that are called DESTROY or AUTOLOAD, because |
71
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those are special to perl. |
72
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73
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When you call the ...->foo() method on an object, it first looks for |
74
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an XML attribute with that name. If there is one, its value is returned. |
75
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76
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If there's no such attribute, then it looks for a child element with that |
77
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name. If no parameter is given, it returns the first such element. If a |
78
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numeric parameter is given, it returns the Nth element (counting from 0). |
79
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If the parameter is '*' then all such elements are returned. Otherwise, |
80
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child elements of the appropriate type are searched and a list of those whose |
81
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...->name() method returns something that matches the parameter is returned. |
82
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83
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=head2 _parent |
84
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85
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Returns the parent element of this element. It is an error to call this |
86
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on the root element. |
87
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88
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=head2 _root |
89
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90
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Return the root element. |
91
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92
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=cut |
93
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94
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sub AUTOLOAD { |
95
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98
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98
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3195
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(my $nodename = $AUTOLOAD) =~ s/.*:://; |
96
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98
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135
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my $self = shift(); |
97
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98
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100
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319
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my $wanted = shift() || 0; |
98
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99
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98
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50
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190
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return if($nodename eq 'DESTROY'); |
100
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101
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# attribs take precedence ... |
102
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98
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100
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370
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return $self->{attrib}->{$nodename} |
103
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if(exists($self->{attrib}->{$nodename})); |
104
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105
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83
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112
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my @childnodes = (); |
106
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83
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187
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foreach my $childnode (@{$self->{content}}) { |
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83
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200
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107
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340
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100
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66
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1614
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if($childnode->{type} eq 'e' && $childnode->{name} eq $nodename) { |
108
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131
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318
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push @childnodes, __PACKAGE__->_new($childnode, _parent => $self); |
109
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} |
110
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} |
111
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83
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100
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578
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if($wanted eq '*') { |
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100
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112
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2
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10
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return @childnodes; |
113
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} elsif($wanted =~ /^\d+$/) { |
114
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80
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100
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1332
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return $childnodes[$wanted] if(exists($childnodes[$wanted])); |
115
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1
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8
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die("Can't get '$nodename' number $wanted from object ".ref($self)."\n") |
116
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; |
117
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} else { |
118
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1
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2
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return (grep { $_->name() eq $wanted } @childnodes); |
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4
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21
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119
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} |
120
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} |
121
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122
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sub _new { |
123
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133
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133
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6729
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my $class = shift; |
124
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133
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128
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my $document = shift; |
125
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133
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225
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my %params = @_; |
126
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133
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100
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303
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if($params{_parent}) { $document->{_parent} = $params{_parent}; } |
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131
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209
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127
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133
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556
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bless $document, $class; |
128
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} |
129
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130
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sub _parent { |
131
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9
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9
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13
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my $self = shift; |
132
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9
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100
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16
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return $self->{_parent} if($self->{_parent}); |
133
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2
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13
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die("Can't get root element's parent\n"); |
134
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} |
135
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136
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sub _root { |
137
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1
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1
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3
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my $self = shift; |
138
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1
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2
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$@ = 0; |
139
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1
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4
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while(!$@) { eval { $self = $self->_parent() }; } |
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3
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4
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3
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7
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140
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1
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8
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return $self; |
141
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} |
142
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143
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sub _gettext { |
144
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33
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33
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42
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my $self = shift; |
145
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33
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55
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my $c = $self->{content}; |
146
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33
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100
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66
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265
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if( |
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100
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100
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66
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147
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ref($c) eq 'ARRAY' && |
148
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defined($c->[0]->{type}) && |
149
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$c->[0]->{type} eq 't' # it's a text node |
150
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3
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17
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) { |
151
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30
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140
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(my $value = $c->[0]->{content}) =~ s/^\s+|\s+$//g; |
152
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30
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130
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return $value; |
153
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} elsif( |
154
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ref($c) eq 'ARRAY' && |
155
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(keys %{$c->[0]}) == 0 # empty node |
156
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) { # empty element stringifies to '' |
157
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1
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3
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return ''; |
158
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} else { |
159
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2
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18
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die("Can't stringify '".$self->{name}."' in ".ref($self)."\n"); |
160
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} |
161
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} |
162
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163
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sub _compare { |
164
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25
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25
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45
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my($self, $op, $comparand, $reversed) = @_; |
165
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25
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50
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my $value = $self->_gettext(); |
166
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25
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100
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57
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($value, $comparand) = ($comparand, $value) if($reversed); |
167
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25
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1269
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return eval "\$value $op \$comparand"; |
168
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} |
169
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170
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=head1 BUGS and FEEDBACK |
171
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172
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I welcome feedback about my code, including constructive criticism. |
173
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Bug reports should be made using L or by email, |
174
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and should include the smallest possible chunk of code, along with |
175
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any necessary XML data, which demonstrates the bug. Ideally, this |
176
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will be in the form of a file which I can drop in to the module's |
177
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test suite. |
178
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179
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=head1 SEE ALSO |
180
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181
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L |
182
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183
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L |
184
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185
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=head1 AUTHOR, COPYRIGHT and LICENCE |
186
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187
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David Cantrell EFE |
188
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189
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Copyright 2009 David Cantrell Edavid@cantrell.org.ukE |
190
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191
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This software is free-as-in-speech software, and may be used, |
192
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distributed, and modified under the terms of either the GNU |
193
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General Public Licence version 2 or the Artistic Licence. It's |
194
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up to you which one you use. The full text of the licences can |
195
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be found in the files GPL2.txt and ARTISTIC.txt, respectively. |
196
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197
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=head1 CONSPIRACY |
198
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199
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This module is also free-as-in-mason software. |
200
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201
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=cut |
202
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203
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'zero'; |