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package XML::DOM::Lite::NodeIterator; |
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use warnings; |
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use strict; |
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use XML::DOM::Lite::Constants qw(:all); |
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use constant BEFORE => -1; |
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use constant AFTER => 1; |
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4342
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sub new { |
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my ($class, $root, $whatToShow, $nodeFilter) = @_; |
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my $self = bless { |
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root => $root, |
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whatToShow => $whatToShow |
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}, $class; |
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unless (defined $nodeFilter) { |
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$self->filter({ acceptNode => sub { return FILTER_ACCEPT } }); |
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} else { |
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$self->filter($nodeFilter); |
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} |
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$self->{currentNode} = $root; |
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$self->{POSITION} = BEFORE; |
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0
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return $self; |
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} |
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sub filter { $_[0]->{filter} = $_[1] if $_[1]; $_[0]->{filter} } |
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sub nextNode { |
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my $self = shift; |
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for (;;) { |
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if ($self->{POSITION} == BEFORE) { |
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# do nothing so we test the currentNode |
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} elsif ($self->{currentNode}->childNodes->length) { |
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$self->{currentNode} = $self->{currentNode}->childNodes->[0]; |
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} elsif ($self->{currentNode}->nextSibling) { |
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$self->{currentNode} = $self->{currentNode}->nextSibling; |
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} elsif ($self->{currentNode}->parentNode) { |
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my $p = $self->{currentNode}->parentNode; |
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while ($p and $p->nextSibling == undef and $p != $self->{root}) { |
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$p = $p->parentNode; |
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} |
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last unless ($p and $p->nextSibling); |
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$self->{currentNode} = $p->nextSibling; |
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} else { |
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last; |
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} |
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$self->{POSITION} = AFTER; |
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my $rv; |
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0
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if ($self->filter->{whatToShow} & (1 << ($self->{currentNode}->nodeType - 1))) { |
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$rv = $self->filter->{acceptNode}->($self->{currentNode}); |
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} else { |
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$rv = FILTER_REJECT; |
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} |
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0
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if ($rv == FILTER_ACCEPT) { |
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0
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return $self->{currentNode}; |
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} |
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elsif ($rv == FILTER_SKIP) { |
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if ($self->{currentNode}->nextSibling) { |
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$self->{currentNode} = $self->{currentNode}->nextSibling; |
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} else { |
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my $p = $self->{currentNode}->parentNode; |
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while ($p and $p->nextSibling == undef) { |
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$p = $p->parentNode; |
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} |
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last unless ($p and $p->nextSibling); |
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$self->{currentNode} = $p->nextSibling; |
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} |
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0
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next; |
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} |
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elsif ($rv != FILTER_REJECT) { |
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die('filter returned unknown value: `'.$rv."'"); |
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} |
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} |
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return undef; |
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} |
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79
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sub previousNode { |
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0
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my $self = shift; |
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for (;;) { |
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0
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if ($self->{POSITION} == AFTER) { |
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0
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0
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# do nothing |
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} elsif ($self->{currentNode}->previousSibling) { |
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0
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my $p = $self->{currentNode}->previousSibling; |
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0
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if ($p->childNodes->length) { |
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$self->{currentNode} = $p->childNodes->[$p->childNodes->length-1]; |
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0
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while ($self->{currentNode}->childNodes->length) { |
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0
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$self->{currentNode} = $self->{currentNode}->childNodes->[$self->{currentNode}->childNodes->length - 1]; |
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} |
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} else { |
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0
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$self->{currentNode} = $p; |
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} |
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} elsif ($self->{currentNode}->parentNode and $self->{currentNode}->parentNode != $self->{root}) { |
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0
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$self->{currentNode} = $self->{currentNode}->parentNode; |
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} else { |
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0
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last; |
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} |
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0
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$self->{POSITION} = BEFORE; |
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0
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my $rv; |
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0
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0
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if ($self->filter->{whatToShow} & (1 << ($self->{currentNode}->nodeType - 1))) { |
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0
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$rv = $self->filter->{acceptNode}->($self->{currentNode}); |
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} else { |
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0
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$rv = FILTER_REJECT; |
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} |
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0
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0
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if ($rv == FILTER_ACCEPT) { |
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0
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0
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108
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0
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return $self->{currentNode}; |
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} |
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elsif ($rv == FILTER_SKIP) { |
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0
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0
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if ($self->{currentNode}->previousSibling) { |
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0
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112
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0
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$self->{currentNode} = $self->{currentNode}->previousSibling; |
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} elsif ($self->{currentNode}->parentNode) { |
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0
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$self->{currentNode} = $self->{currentNode}->parentNode; |
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} else { |
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0
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last; |
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} |
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0
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next; |
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} |
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elsif ($rv != FILTER_REJECT) { |
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0
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die('filter returned unknown value: `'.$rv."'"); |
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} |
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} |
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0
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return undef; |
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} |
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127
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1; |