annotate Lib/IMPL/DOM/Node.pm @ 114:7084af955c57

minor changes, more strict code, no bugs fixed, no features added
author wizard
date Tue, 25 May 2010 01:26:42 +0400
parents 7b14e0122b79
children 1722ca51537c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 package IMPL::DOM::Node;
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2 use strict;
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3 use warnings;
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4
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5 use base qw(IMPL::Object);
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6
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7 use IMPL::Object::List;
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8 use IMPL::Class::Property;
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9 use IMPL::Class::Property::Direct;
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10 use Scalar::Util qw(weaken);
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11
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12 use IMPL::Exception;
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13
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14 BEGIN {
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15 public _direct property nodeName => prop_get;
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16 public _direct property document => prop_get;
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17 public _direct property isComplex => { get => \&_getIsComplex } ;
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18 public _direct property nodeValue => prop_all;
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19 public _direct property childNodes => { get => \&_getChildNodes }; # prop_list
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20 public _direct property parentNode => prop_get ;
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21 private _direct property _propertyMap => prop_all ;
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22 }
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23
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24 our %Axes = (
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25 parent => \&selectParent,
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26 siblings => \&selectSiblings,
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27 child => \&childNodes,
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28 document => \&selectDocument
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29 );
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30
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31 sub CTOR {
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32 my ($this,%args) = @_;
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33
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34 $this->{$nodeName} = delete $args{nodeName} or die new IMPL::InvalidArgumentException("A name is required");
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35 $this->{$nodeValue} = delete $args{nodeValue} if exists $args{nodeValue};
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36 if ( exists $args{document} ) {
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37 $this->{$document} = delete $args{document};
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38 weaken($this->{$document});
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39 }
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40
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41 $this->{$_propertyMap} = \%args;
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42 }
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43
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44 sub insertNode {
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45 my ($this,$node,$pos) = @_;
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46
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47 die new IMPL::InvalidOperationException("You can't insert the node to itselft") if $this == $node;
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48
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49 $node->{$parentNode}->removeNode($node) if ($node->{$parentNode});
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50
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51 $this->childNodes->InsertAt($pos,$node);
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52
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53 $node->_setParent( $this );
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54
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55 return $node;
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56 }
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57
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58 sub appendChild {
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59 my ($this,$node) = @_;
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60
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61 die new IMPL::InvalidOperationException("You can't insert the node to itselft") if $this == $node;
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62
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63 $node->{$parentNode}->removeNode($node) if ($node->{$parentNode});
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64
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65 my $children = $this->childNodes;
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66 $children->Append($node);
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67
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68 $node->_setParent( $this );
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69
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70 return $node;
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71 }
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72
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73 sub appendNode {
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74 goto &appendChild;
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75 }
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76
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77 sub appendRange {
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78 my ($this,@range) = @_;
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79
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80 die new IMPL::InvalidOperationException("You can't insert the node to itselft") if grep $_ == $this, @range;
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81
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82 foreach my $node (@range) {
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83 $node->{$parentNode}->removeNode($node) if ($node->{$parentNode});
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84 $node->_setParent( $this );
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85 }
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86
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87 $this->childNodes->Append(@range);
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88
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89 return $this;
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90 }
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91
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92 sub _getChildNodes {
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93 my ($this) = @_;
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94
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95 $this->{$childNodes} = new IMPL::Object::List() unless $this->{$childNodes};
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96 return wantarray ? @{ $this->{$childNodes} } : $this->{$childNodes};
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97 }
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98
109
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99 sub childNodesRef {
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100 my ($this) = @_;
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101 return scalar $this->_getChildNodes;
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102 }
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103
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104 sub removeNode {
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105 my ($this,$node) = @_;
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106
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107 if ($this == $node->{$parentNode}) {
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108 $this->childNodes->RemoveItem($node);
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109 $node->_setParent(undef);
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110 return $node;
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111 } else {
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112 die new IMPL::InvalidOperationException("The specified node isn't belong to this node");
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113 }
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114 }
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115
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116 sub replaceNodeAt {
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117 my ($this,$index,$node) = @_;
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118
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119 my $nodeOld = $this->childNodes->[$index];
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120
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121 die new IMPL::InvalidOperationException("You can't insert the node to itselft") if $this == $node;
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122
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123 # unlink node from previous parent
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124 $node->{$parentNode}->removeNode($node) if ($node->{$parentNode});
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125
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126 # replace (or set) old node
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127 $this->childNodes->[$index] = $node;
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128
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129 # set new parent
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130 $node->_setParent( $this );
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131
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132 # unlink old node if we have one
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133 $nodeOld->_setParent(undef) if $nodeOld;
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134
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135 # return old node
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136 return $nodeOld;
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137 }
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138
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139 sub removeAt {
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140 my ($this,$pos) = @_;
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141
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142 if ( my $node = $this->childNodes->RemoveAt($pos) ) {
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143 $node->_setParent(undef);
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144 return $node;
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145 } else {
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146 return undef;
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147 }
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148 }
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149
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150 sub removeLast {
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151 my ($this) = @_;
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152
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153 if ( my $node = $this->{$childNodes} ? $this->{$childNodes}->RemoveLast() : undef) {
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154 $node->_setParent(undef);
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155 return $node;
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156 } else {
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157 return undef;
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158 }
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159 }
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160
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161 sub removeSelected {
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162 my ($this,$query) = @_;
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163
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164 my @newSet;
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165 my @result;
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166
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167 if (ref $query eq 'CODE') {
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168 &$query($_) ? push @result, $_ : push @newSet, $_ foreach @{$this->childNodes};
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169 } elsif (defined $query) {
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170 $_->nodeName eq $query ? push @result, $_ : push @newSet, $_ foreach @{$this->childNodes};
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171 } else {
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172 my $children = $this->childNodes;
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173 $_->_setParent(undef) foreach @$children;
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174 delete $this->{$childNodes};
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175 return wantarray ? @$children : $children;
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176 }
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177
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178 $_->_setParent(undef) foreach @result;
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179
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180 $this->{$childNodes} = @newSet ? bless \@newSet ,'IMPL::Object::List' : undef;
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181
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182 return wantarray ? @result : \@result;
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183 }
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184
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185 sub resolveAxis {
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186 my ($this,$axis) = @_;
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187 return $Axes{$axis}->($this)
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188 }
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189
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190 sub selectNodes {
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191 my $this = shift;
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192 my ($path) = @_;
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193
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194 $path = ref $path eq 'ARRAY' ? $path : ( @_ == 1 ? $this->translatePath($path) : [@_]);
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195
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196 my @set = ($this);
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197
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198 while (my $query = shift @$path) {
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199 @set = map $_->selectNodesAxis($query), @set;
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200 }
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201
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202 return wantarray ? @set : \@set;
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203 }
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204
113
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205 sub selectSingleNode {
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206 my $this = shift;
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207 my @result = $this->selectNodes(@_);
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208 return $result[0];
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209 }
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210
109
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211 sub selectNodesRef {
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212 my $this = shift;
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213
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214 my @result = $this->selectNodes(@_);
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215 return \@result;
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216 }
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217
108
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218 sub translatePath {
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219 my ($this,$path) = @_;
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220
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221 # TODO: Move path compilation here from IMPL::DOM::Schema::Validator::Compare
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222 return [$path];
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223 }
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224
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225 sub selectNodesAxis {
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226 my ($this,$query,$axis) = @_;
104
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227
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228 $axis ||= 'child';
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229
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230 die new IMPL::InvalidOperationException('Unknown axis',$axis) unless exists $Axes{$axis};
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231
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232 my $nodes = $this->resolveAxis($axis);
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233
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234 my @result;
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235
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236 if (ref $query eq 'CODE') {
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237 @result = grep &$query($_), @{$nodes};
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238 } elsif (ref $query eq 'ARRAY' ) {
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239 my %keys = map (($_,1),@$query);
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240 @result = grep $keys{$_->nodeName}, @{$nodes};
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241 } elsif (ref $query eq 'HASH') {
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242 while( my ($axis,$filter) = each %$query ) {
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243 push @result, $this->selectNodesAxis($filter,$axis);
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244 }
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245 } elsif (defined $query) {
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246 @result = grep $_->nodeName eq $query, @{$nodes};
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247 } else {
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248 return wantarray ? @{$nodes} : $nodes;
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249 }
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250
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251 return wantarray ? @result : \@result;
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252 }
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253
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254 sub selectParent {
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255 my ($this) = @_;
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256
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257 if ($this->parentNode) {
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258 return wantarray ? $this->parentNode : [$this->parentNode];
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259 } else {
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260 return wantarray ? () : [];
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261 }
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262 }
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263
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264 sub selectSiblings {
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265 my ($this) = @_;
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266
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267 if ($this->parentNode) {
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268 return $this->parentNode->selectNodes( sub { $_ != $this } );
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269 } else {
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270 return wantarray ? () : [];
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271 }
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272 }
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273
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274 sub selectDocument {
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275 my ($this) = @_;
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276
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277 if ($this->document) {
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278 return wantarray ? $this->document : [$this->document];
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279 } else {
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280 return wantarray ? () : [];
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281 }
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282 }
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283
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284 sub firstChild {
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285 @_ >=2 ? $_[0]->replaceNodeAt(0,$_[1]) : $_[0]->childNodes->[0];
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286 }
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287
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288 sub _getIsComplex {
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289 $_[0]->childNodes->Count ? 1 : 0;
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290 }
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291
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292 sub _updateDocRefs {
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293 my ($this) = @_;
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294
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295 # this method is called by the parent node on his children, so we need no to check parent
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296 $this->{$document} = $this->{$parentNode}->document;
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297
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298 # prevent cyclic
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299 weaken($this->{$document}) if $this->{$document};
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300
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301 $_->_updateDocRefs foreach @{$this->{$childNodes}};
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302 }
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303
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304 sub _setParent {
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305 my ($this,$node) = @_;
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306
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307
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308 if (($node || 0) != ($this->{$parentNode} || 0)) {
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309 my $newOwner;
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310 if ($node) {
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311 $this->{$parentNode} = $node;
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312 $newOwner = $node->document || 0;
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313
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314 # prevent from creating cyclicreferences
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315 weaken($this->{$parentNode});
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316
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317 } else {
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318 delete $this->{$parentNode};
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319
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320 #keep document
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321 $newOwner = $this->{$document};
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322 }
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323
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324 if (($this->{$document}||0) != $newOwner) {
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325 $this->{$document} = $newOwner;
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326 weaken($this->{$document}) if $newOwner;
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327 $_->_updateDocRefs foreach @{$this->childNodes};
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328 }
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329 }
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330 }
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331
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332 sub text {
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333 my ($this) = @_;
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334
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335 join ('', $this->nodeValue || '', map ($_->text || '', @{$this->childNodes}));
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336 }
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337
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338 sub nodeProperty {
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339 my $this = shift;
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340 my $name = shift;
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341
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342 if (@_) {
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343 # set
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344 return $this->{$_propertyMap}{$name} = shift;
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345 } else {
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346 return $this->{$_propertyMap}{$name};
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347 }
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348 }
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349
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350 sub qname {
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351 $_[0]->{$nodeName};
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352 }
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353
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354 sub path {
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355 my ($this) = @_;
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356
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357 if ($this->parentNode) {
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358 return $this->parentNode->path.'.'.$this->qname;
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359 } else {
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360 return $this->qname;
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361 }
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362 }
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363
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364 1;
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365
wizard
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366 __END__
wizard
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367
wizard
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368 =pod
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369
wizard
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370 =head1 NAME
wizard
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371
wizard
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372 C<IMPL::DOM::Node> Элемент DOM модели
wizard
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373
wizard
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374 =head1 DESCRIPTION
wizard
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375
wizard
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376 Базовый узел DOM модели. От него можно наследовать другие элементы DOM модели.
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377
wizard
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378 =head1 MEMBERS
wizard
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379
wizard
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380 =head2 PROPERTIES
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381
wizard
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382 =over
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383
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384 =item C<[get] nodeName>
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385
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386 Имя узла. Задается при создании.
wizard
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387
wizard
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388 =item C<[get] document>
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389
wizard
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390 Документ к которому принадлежит узел. Задается при поздании узла.
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391
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392 =item C<[get] isComplex>
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393
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394 Определяет является ли узел сложным (тоесть есть ли дети).
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395
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396 C<true> - есть, C<false> - нет.
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397
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398 =item C<[get,set] nodeValue>
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399
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400 Значение узла, обычно простой скаляр, но ничто не мешает туда
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401 устанавливать любое значение.
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402
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403 =item C<[get,list] childNodes>
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404
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405 Список детей, является списокм C<IMPL::Object::List>.
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406
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407 =item C<[get] parentNode>
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408
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409 Ссылка на родительский элемент, если таковой имеется.
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410
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411 =head2 METHODS
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412
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413 =cut