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package XML::DOM::Lite::Parser; |
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use XML::DOM::Lite::Document; |
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use XML::DOM::Lite::Node; |
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use XML::DOM::Lite::Constants qw(:all); |
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24782
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#======================================================================== |
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# These regular expressions have been gratefully borrowed from: |
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# |
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# REX/Perl 1.0 |
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# Robert D. Cameron "REX: XML Shallow Parsing with Regular Expressions", |
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# Technical Report TR 1998-17, School of Computing Science, Simon Fraser |
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# University, November, 1998. |
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# Copyright (c) 1998, Robert D. Cameron. |
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# The following code may be freely used and distributed provided that |
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# this copyright and citation notice remains intact and that modifications |
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# or additions are clearly identified. |
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our $TextSE = "[^<]+"; |
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our $UntilHyphen = "[^-]*-"; |
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our $Until2Hyphens = "$UntilHyphen(?:[^-]$UntilHyphen)*-"; |
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our $CommentCE = "$Until2Hyphens>?"; |
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our $UntilRSBs = "[^\\]]*](?:[^\\]]+])*]+"; |
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our $CDATA_CE = "$UntilRSBs(?:[^\\]>]$UntilRSBs)*>"; |
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our $S = "[ \\n\\t\\r]+"; |
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our $NameStrt = "[A-Za-z_:]|[^\\x00-\\x7F]"; |
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our $NameChar = "[A-Za-z0-9_:.-]|[^\\x00-\\x7F]"; |
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our $Name = "(?:$NameStrt)(?:$NameChar)*"; |
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our $QuoteSE = "\"[^\"]*\"|'[^']*'"; |
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our $DT_IdentSE = "$S$Name(?:$S(?:$Name|$QuoteSE))*"; |
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our $MarkupDeclCE = "(?:[^\\]\"'><]+|$QuoteSE)*>"; |
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our $S1 = "[\\n\\r\\t ]"; |
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our $UntilQMs = "[^?]*\\?+"; |
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our $PI_Tail = "\\?>|$S1$UntilQMs(?:[^>?]$UntilQMs)*>"; |
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our $DT_ItemSE = "<(?:!(?:--$Until2Hyphens>|[^-]$MarkupDeclCE)|\\?$Name(?:$PI_Tail))|%$Name;|$S"; |
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our $DocTypeCE = "$DT_IdentSE(?:$S)?(?:\\[(?:$DT_ItemSE)*](?:$S)?)?>?"; |
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our $DeclCE = "--(?:$CommentCE)?|\\[CDATA\\[(?:$CDATA_CE)?|DOCTYPE(?:$DocTypeCE)?"; |
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our $PI_CE = "$Name(?:$PI_Tail)?"; |
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our $EndTagCE = "$Name(?:$S)?>?"; |
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our $AttValSE = "\"[^<\"]*\"|'[^<']*'"; |
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our $ElemTagCE = "$Name(?:$S$Name(?:$S)?=(?:$S)?(?:$AttValSE))*(?:$S)?/?>?"; |
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our $ElementCE = "/(?:$EndTagCE)?|(?:$ElemTagCE)?"; |
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our $MarkupSPE = "<(?:!(?:$DeclCE)?|\\?(?:$PI_CE)?|(?:$ElementCE)?)"; |
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our $XML_SPE = "$TextSE|$MarkupSPE"; |
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#======================================================================== |
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# these have captures for parsing the attributes |
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our $AttValSE2 = "\"([^<\"]*)\"|'([^<']*)'"; |
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our $ElemTagCE2 = "(?:($Name)(?:$S)?=(?:$S)?($AttValSE2))+(?:$S)?/?>?"; |
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sub new { |
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my ($class, %options) = @_; |
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my $self = bless { |
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stack => [ ], |
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options => \%options, |
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}, $class; |
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return $self; |
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} |
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sub parse { |
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9170
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my ($self, $XML) = (shift, shift); |
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unless (ref($self)) { |
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0
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$self = __PACKAGE__->new(@_); |
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} |
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239
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my @nodes = $self->_shallow_parse($XML); |
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$self->{document} = XML::DOM::Lite::Document->new(); |
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push @{$self->{stack}}, $self->{document}; |
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71
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STEP : foreach my $n ( @nodes ) { |
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substr($n, 0, 1) eq '<' && do { |
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174
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substr($n, 1, 1) eq '!' && do { |
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1
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$self->_handle_decl_node($n); |
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1
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next STEP; |
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}; |
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substr($n, 1, 1) eq '?' && do { |
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$self->_handle_pi_node($n); |
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next STEP; |
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}; |
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$self->_handle_element_node($n); |
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next STEP; |
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}; |
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$self->_handle_text_node($n); |
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} |
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return $self->{document}; |
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} |
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sub parseFile { |
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my ($self, $filename) = @_; |
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unless (ref $self) { |
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$self = __PACKAGE__->new; |
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} |
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my $stream; |
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{ |
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open FH, $filename or |
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die "can't open file $filename for reading ".$!; |
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local $/ = undef; |
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$stream = ; |
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close FH; |
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} |
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return $self->parse($stream); |
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} |
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106
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sub _shallow_parse { |
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my ($self, $XML) = @_; |
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109
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# Check the options. |
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my %options = %{$self->{options}}; |
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111
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if (defined($options{'whitespace'})) { |
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my $mode = $options{'whitespace'}; |
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if (index($mode, 'strip') >= 0) { |
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$XML =~ s/>$S/>/sg; |
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3689
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$XML =~ s/$S
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} |
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if (index($mode, 'normalize') >= 0) { |
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$XML =~ s/$S/ /sg |
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} |
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} |
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122
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return $XML =~ /$XML_SPE/go; |
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} |
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sub _handle_decl_node { |
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my ($self, $decl) = @_; |
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my $kind; |
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my $length = length($decl); |
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my $start = 1; |
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$parent = $self->{stack}->[$#{$self->{stack}}]; |
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substr($decl, 0, 4) eq ' |