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# $Id: DTDDecls.pm,v 1.7 2005/10/14 20:31:20 matt Exp $
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package XML::SAX::PurePerl;
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use strict;
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use XML::SAX::PurePerl::Productions qw($NameChar $SingleChar);
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sub elementdecl {
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my ($self, $reader) = @_;
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my $data = $reader->data(9);
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return 0 unless $data =~ /^<!ELEMENT/;
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$reader->move_along(9);
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$self->skip_whitespace($reader) ||
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$self->parser_error("No whitespace after ELEMENT declaration", $reader);
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my $name = $self->Name($reader);
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$self->skip_whitespace($reader) ||
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$self->parser_error("No whitespace after ELEMENT's name", $reader);
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$self->contentspec($reader, $name);
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$self->skip_whitespace($reader);
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$reader->match('>') or $self->parser_error("Closing angle bracket not found on ELEMENT declaration", $reader);
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return 1;
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}
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sub contentspec {
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my ($self, $reader, $name) = @_;
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my $data = $reader->data(5);
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my $model;
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if ($data =~ /^EMPTY/) {
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$reader->move_along(5);
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$model = 'EMPTY';
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}
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elsif ($data =~ /^ANY/) {
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$reader->move_along(3);
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$model = 'ANY';
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}
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else {
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$model = $self->Mixed_or_children($reader);
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}
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if ($model) {
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# call SAX callback now.
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$self->element_decl({Name => $name, Model => $model});
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return 1;
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}
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$self->parser_error("contentspec not found in ELEMENT declaration", $reader);
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}
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sub Mixed_or_children {
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my ($self, $reader) = @_;
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my $data = $reader->data(8);
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$data =~ /^\(/ or return; # $self->parser_error("No opening bracket in Mixed or children", $reader);
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if ($data =~ /^\(\s*\#PCDATA/) {
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$reader->match('(');
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$self->skip_whitespace($reader);
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$reader->move_along(7);
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my $model = $self->Mixed($reader);
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return $model;
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}
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# not matched - must be Children
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return $self->children($reader);
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}
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# Mixed ::= ( '(' S* PCDATA ( S* '|' S* QName )* S* ')' '*' )
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# | ( '(' S* PCDATA S* ')' )
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sub Mixed {
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my ($self, $reader) = @_;
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# Mixed_or_children already matched '(' S* '#PCDATA'
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my $model = '(#PCDATA';
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$self->skip_whitespace($reader);
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my %seen;
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while (1) {
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last unless $reader->match('|');
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$self->skip_whitespace($reader);
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my $name = $self->Name($reader) ||
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$self->parser_error("No 'Name' after Mixed content '|'", $reader);
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if ($seen{$name}) {
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$self->parser_error("Element '$name' has already appeared in this group", $reader);
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}
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$seen{$name}++;
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$model .= "|$name";
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$self->skip_whitespace($reader);
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}
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$reader->match(')') || $self->parser_error("no closing bracket on mixed content", $reader);
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$model .= ")";
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if ($reader->match('*')) {
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$model .= "*";
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}
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return $model;
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}
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# [[47]] Children ::= ChoiceOrSeq Cardinality?
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# [[48]] Cp ::= ( QName | ChoiceOrSeq ) Cardinality?
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# ChoiceOrSeq ::= '(' S* Cp ( Choice | Seq )? S* ')'
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# [[49]] Choice ::= ( S* '|' S* Cp )+
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# [[50]] Seq ::= ( S* ',' S* Cp )+
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# // Children ::= (Choice | Seq) Cardinality?
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# // Cp ::= ( QName | Choice | Seq) Cardinality?
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# // Choice ::= '(' S* Cp ( S* '|' S* Cp )+ S* ')'
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# // Seq ::= '(' S* Cp ( S* ',' S* Cp )* S* ')'
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# [[51]] Mixed ::= ( '(' S* PCDATA ( S* '|' S* QName )* S* ')' MixedCardinality )
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# | ( '(' S* PCDATA S* ')' )
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# Cardinality ::= '?' | '+' | '*'
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# MixedCardinality ::= '*'
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sub children {
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my ($self, $reader) = @_;
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return $self->ChoiceOrSeq($reader) . $self->Cardinality($reader);
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}
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sub ChoiceOrSeq {
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my ($self, $reader) = @_;
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$reader->match('(') or $self->parser_error("choice/seq contains no opening bracket", $reader);
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my $model = '(';
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$self->skip_whitespace($reader);
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$model .= $self->Cp($reader);
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if (my $choice = $self->Choice($reader)) {
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$model .= $choice;
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}
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else {
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$model .= $self->Seq($reader);
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}
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$self->skip_whitespace($reader);
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$reader->match(')') or $self->parser_error("choice/seq contains no closing bracket", $reader);
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$model .= ')';
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return $model;
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}
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sub Cardinality {
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my ($self, $reader) = @_;
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# cardinality is always optional
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my $data = $reader->data;
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if ($data =~ /^([\?\+\*])/) {
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$reader->move_along(1);
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return $1;
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}
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return '';
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}
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sub Cp {
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my ($self, $reader) = @_;
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my $model;
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my $name = eval
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{
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if (my $name = $self->Name($reader)) {
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return $name . $self->Cardinality($reader);
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}
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};
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return $name if defined $name;
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return $self->ChoiceOrSeq($reader) . $self->Cardinality($reader);
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}
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sub Choice {
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my ($self, $reader) = @_;
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my $model = '';
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$self->skip_whitespace($reader);
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while ($reader->match('|')) {
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$self->skip_whitespace($reader);
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$model .= '|';
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$model .= $self->Cp($reader);
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$self->skip_whitespace($reader);
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}
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return $model;
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}
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sub Seq {
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my ($self, $reader) = @_;
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my $model = '';
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$self->skip_whitespace($reader);
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while ($reader->match(',')) {
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$self->skip_whitespace($reader);
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my $cp = $self->Cp($reader);
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if ($cp) {
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$model .= ',';
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$model .= $cp;
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}
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$self->skip_whitespace($reader);
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}
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return $model;
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}
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sub AttlistDecl {
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my ($self, $reader) = @_;
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my $data = $reader->data(9);
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if ($data =~ /^<!ATTLIST/) {
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# It's an attlist
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$reader->move_along(9);
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$self->skip_whitespace($reader) ||
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$self->parser_error("No whitespace after ATTLIST declaration", $reader);
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my $name = $self->Name($reader);
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$self->AttDefList($reader, $name);
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$self->skip_whitespace($reader);
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$reader->match('>') or $self->parser_error("Closing angle bracket not found on ATTLIST declaration", $reader);
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return 1;
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}
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return 0;
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}
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sub AttDefList {
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my ($self, $reader, $name) = @_;
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1 while $self->AttDef($reader, $name);
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}
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sub AttDef {
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my ($self, $reader, $el_name) = @_;
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$self->skip_whitespace($reader) || return 0;
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my $att_name = $self->Name($reader) || return 0;
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$self->skip_whitespace($reader) ||
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$self->parser_error("No whitespace after Name in attribute definition", $reader);
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my $att_type = $self->AttType($reader);
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$self->skip_whitespace($reader) ||
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$self->parser_error("No whitespace after AttType in attribute definition", $reader);
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my ($mode, $value) = $self->DefaultDecl($reader);
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# fire SAX event here!
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$self->attribute_decl({
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eName => $el_name,
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aName => $att_name,
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Type => $att_type,
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Mode => $mode,
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Value => $value,
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});
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return 1;
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}
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sub AttType {
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my ($self, $reader) = @_;
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return $self->StringType($reader) ||
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$self->TokenizedType($reader) ||
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$self->EnumeratedType($reader) ||
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$self->parser_error("Can't match AttType", $reader);
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}
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sub StringType {
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my ($self, $reader) = @_;
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my $data = $reader->data(5);
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return unless $data =~ /^CDATA/;
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$reader->move_along(5);
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return 'CDATA';
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}
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sub TokenizedType {
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my ($self, $reader) = @_;
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my $data = $reader->data(8);
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if ($data =~ /^(IDREFS?|ID|ENTITIES|ENTITY|NMTOKENS?)/) {
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$reader->move_along(length($1));
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return $1;
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}
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return;
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}
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sub EnumeratedType {
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my ($self, $reader) = @_;
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return $self->NotationType($reader) || $self->Enumeration($reader);
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}
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sub NotationType {
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my ($self, $reader) = @_;
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my $data = $reader->data(8);
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return unless $data =~ /^NOTATION/;
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$reader->move_along(8);
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$self->skip_whitespace($reader) ||
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$self->parser_error("No whitespace after NOTATION", $reader);
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$reader->match('(') or $self->parser_error("No opening bracket in notation section", $reader);
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$self->skip_whitespace($reader);
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my $model = 'NOTATION (';
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my $name = $self->Name($reader) ||
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$self->parser_error("No name in notation section", $reader);
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$model .= $name;
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$self->skip_whitespace($reader);
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$data = $reader->data;
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while ($data =~ /^\|/) {
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$reader->move_along(1);
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$model .= '|';
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$self->skip_whitespace($reader);
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my $name = $self->Name($reader) ||
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$self->parser_error("No name in notation section", $reader);
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$model .= $name;
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$self->skip_whitespace($reader);
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$data = $reader->data;
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}
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$data =~ /^\)/ or $self->parser_error("No closing bracket in notation section", $reader);
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$reader->move_along(1);
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$model .= ')';
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return $model;
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}
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sub Enumeration {
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my ($self, $reader) = @_;
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return unless $reader->match('(');
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$self->skip_whitespace($reader);
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my $model = '(';
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my $nmtoken = $self->Nmtoken($reader) ||
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$self->parser_error("No Nmtoken in enumerated declaration", $reader);
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$model .= $nmtoken;
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$self->skip_whitespace($reader);
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my $data = $reader->data;
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while ($data =~ /^\|/) {
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$model .= '|';
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$reader->move_along(1);
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$self->skip_whitespace($reader);
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my $nmtoken = $self->Nmtoken($reader) ||
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$self->parser_error("No Nmtoken in enumerated declaration", $reader);
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$model .= $nmtoken;
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$self->skip_whitespace($reader);
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$data = $reader->data;
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}
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$data =~ /^\)/ or $self->parser_error("No closing bracket in enumerated declaration", $reader);
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$reader->move_along(1);
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$model .= ')';
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return $model;
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}
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sub Nmtoken {
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my ($self, $reader) = @_;
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return $self->Name($reader);
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}
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sub DefaultDecl {
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my ($self, $reader) = @_;
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my $data = $reader->data(9);
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if ($data =~ /^(\#REQUIRED|\#IMPLIED)/) {
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$reader->move_along(length($1));
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return $1;
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}
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my $model = '';
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if ($data =~ /^\#FIXED/) {
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$reader->move_along(6);
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$self->skip_whitespace($reader) || $self->parser_error(
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"no whitespace after FIXED specifier", $reader);
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my $value = $self->AttValue($reader);
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return "#FIXED", $value;
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}
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my $value = $self->AttValue($reader);
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return undef, $value;
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}
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sub EntityDecl {
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my ($self, $reader) = @_;
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my $data = $reader->data(8);
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return 0 unless $data =~ /^<!ENTITY/;
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$reader->move_along(8);
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$self->skip_whitespace($reader) || $self->parser_error(
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"No whitespace after ENTITY declaration", $reader);
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$self->PEDecl($reader) || $self->GEDecl($reader);
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$self->skip_whitespace($reader);
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$reader->match('>') or $self->parser_error("No closing '>' in entity definition", $reader);
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return 1;
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}
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sub GEDecl {
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my ($self, $reader) = @_;
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my $name = $self->Name($reader) || $self->parser_error("No entity name given", $reader);
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$self->skip_whitespace($reader) || $self->parser_error("No whitespace after entity name", $reader);
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# TODO: ExternalID calls lexhandler method. Wrong place for it.
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my $value;
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if ($value = $self->ExternalID($reader)) {
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$value .= $self->NDataDecl($reader);
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}
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else {
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$value = $self->EntityValue($reader);
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}
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437 |
|
|
438 |
if ($self->{ParseOptions}{entities}{$name}) {
|
|
439 |
warn("entity $name already exists\n");
|
|
440 |
} else {
|
|
441 |
$self->{ParseOptions}{entities}{$name} = 1;
|
|
442 |
$self->{ParseOptions}{expanded_entity}{$name} = $value; # ???
|
|
443 |
}
|
|
444 |
# do callback?
|
|
445 |
return 1;
|
|
446 |
}
|
|
447 |
|
|
448 |
sub PEDecl {
|
|
449 |
my ($self, $reader) = @_;
|
|
450 |
|
|
451 |
return 0 unless $reader->match('%');
|
|
452 |
|
|
453 |
$self->skip_whitespace($reader) || $self->parser_error("No whitespace after parameter entity marker", $reader);
|
|
454 |
my $name = $self->Name($reader) || $self->parser_error("No parameter entity name given", $reader);
|
|
455 |
$self->skip_whitespace($reader) || $self->parser_error("No whitespace after parameter entity name", $reader);
|
|
456 |
my $value = $self->ExternalID($reader) ||
|
|
457 |
$self->EntityValue($reader) ||
|
|
458 |
$self->parser_error("PE is not a value or an external resource", $reader);
|
|
459 |
# do callback?
|
|
460 |
return 1;
|
|
461 |
}
|
|
462 |
|
|
463 |
my $quotre = qr/[^%&\"]/;
|
|
464 |
my $aposre = qr/[^%&\']/;
|
|
465 |
|
|
466 |
sub EntityValue {
|
|
467 |
my ($self, $reader) = @_;
|
|
468 |
|
|
469 |
my $data = $reader->data;
|
|
470 |
my $quote = '"';
|
|
471 |
my $re = $quotre;
|
|
472 |
if (!$data =~ /^"/) {
|
|
473 |
$data =~ /^'/ or $self->parser_error("Not a quote character", $reader);
|
|
474 |
$quote = "'";
|
|
475 |
$re = $aposre;
|
|
476 |
}
|
|
477 |
$reader->move_along(1);
|
|
478 |
|
|
479 |
my $value = '';
|
|
480 |
|
|
481 |
while (1) {
|
|
482 |
my $data = $reader->data;
|
|
483 |
|
|
484 |
$self->parser_error("EOF found while reading entity value", $reader)
|
|
485 |
unless length($data);
|
|
486 |
|
|
487 |
if ($data =~ /^($re+)/) {
|
|
488 |
my $match = $1;
|
|
489 |
$value .= $match;
|
|
490 |
$reader->move_along(length($match));
|
|
491 |
}
|
|
492 |
elsif ($reader->match('&')) {
|
|
493 |
# if it's a char ref, expand now:
|
|
494 |
if ($reader->match('#')) {
|
|
495 |
my $char;
|
|
496 |
my $ref = '';
|
|
497 |
if ($reader->match('x')) {
|
|
498 |
my $data = $reader->data;
|
|
499 |
while (1) {
|
|
500 |
$self->parser_error("EOF looking for reference end", $reader)
|
|
501 |
unless length($data);
|
|
502 |
if ($data !~ /^([0-9a-fA-F]*)/) {
|
|
503 |
last;
|
|
504 |
}
|
|
505 |
$ref .= $1;
|
|
506 |
$reader->move_along(length($1));
|
|
507 |
if (length($1) == length($data)) {
|
|
508 |
$data = $reader->data;
|
|
509 |
}
|
|
510 |
else {
|
|
511 |
last;
|
|
512 |
}
|
|
513 |
}
|
|
514 |
$char = chr_ref(hex($ref));
|
|
515 |
$ref = "x$ref";
|
|
516 |
}
|
|
517 |
else {
|
|
518 |
my $data = $reader->data;
|
|
519 |
while (1) {
|
|
520 |
$self->parser_error("EOF looking for reference end", $reader)
|
|
521 |
unless length($data);
|
|
522 |
if ($data !~ /^([0-9]*)/) {
|
|
523 |
last;
|
|
524 |
}
|
|
525 |
$ref .= $1;
|
|
526 |
$reader->move_along(length($1));
|
|
527 |
if (length($1) == length($data)) {
|
|
528 |
$data = $reader->data;
|
|
529 |
}
|
|
530 |
else {
|
|
531 |
last;
|
|
532 |
}
|
|
533 |
}
|
|
534 |
$char = chr($ref);
|
|
535 |
}
|
|
536 |
$reader->match(';') ||
|
|
537 |
$self->parser_error("No semi-colon found after character reference", $reader);
|
|
538 |
if ($char !~ $SingleChar) { # match a single character
|
|
539 |
$self->parser_error("Character reference '&#$ref;' refers to an illegal XML character ($char)", $reader);
|
|
540 |
}
|
|
541 |
$value .= $char;
|
|
542 |
}
|
|
543 |
else {
|
|
544 |
# entity refs in entities get expanded later, so don't parse now.
|
|
545 |
$value .= '&';
|
|
546 |
}
|
|
547 |
}
|
|
548 |
elsif ($reader->match('%')) {
|
|
549 |
$value .= $self->PEReference($reader);
|
|
550 |
}
|
|
551 |
elsif ($reader->match($quote)) {
|
|
552 |
# end of attrib
|
|
553 |
last;
|
|
554 |
}
|
|
555 |
else {
|
|
556 |
$self->parser_error("Invalid character in attribute value: " . substr($reader->data, 0, 1), $reader);
|
|
557 |
}
|
|
558 |
}
|
|
559 |
|
|
560 |
return $value;
|
|
561 |
}
|
|
562 |
|
|
563 |
sub NDataDecl {
|
|
564 |
my ($self, $reader) = @_;
|
|
565 |
$self->skip_whitespace($reader) || return '';
|
|
566 |
my $data = $reader->data(5);
|
|
567 |
return '' unless $data =~ /^NDATA/;
|
|
568 |
$reader->move_along(5);
|
|
569 |
$self->skip_whitespace($reader) || $self->parser_error("No whitespace after NDATA declaration", $reader);
|
|
570 |
my $name = $self->Name($reader) || $self->parser_error("NDATA declaration lacks a proper Name", $reader);
|
|
571 |
return " NDATA $name";
|
|
572 |
}
|
|
573 |
|
|
574 |
sub NotationDecl {
|
|
575 |
my ($self, $reader) = @_;
|
|
576 |
|
|
577 |
my $data = $reader->data(10);
|
|
578 |
return 0 unless $data =~ /^<!NOTATION/;
|
|
579 |
$reader->move_along(10);
|
|
580 |
$self->skip_whitespace($reader) ||
|
|
581 |
$self->parser_error("No whitespace after NOTATION declaration", $reader);
|
|
582 |
$data = $reader->data;
|
|
583 |
my $value = '';
|
|
584 |
while(1) {
|
|
585 |
$self->parser_error("EOF found while looking for end of NotationDecl", $reader)
|
|
586 |
unless length($data);
|
|
587 |
|
|
588 |
if ($data =~ /^([^>]*)>/) {
|
|
589 |
$value .= $1;
|
|
590 |
$reader->move_along(length($1) + 1);
|
|
591 |
$self->notation_decl({Name => "FIXME", SystemId => "FIXME", PublicId => "FIXME" });
|
|
592 |
last;
|
|
593 |
}
|
|
594 |
else {
|
|
595 |
$value .= $data;
|
|
596 |
$reader->move_along(length($data));
|
|
597 |
$data = $reader->data;
|
|
598 |
}
|
|
599 |
}
|
|
600 |
return 1;
|
|
601 |
}
|
|
602 |
|
|
603 |
1;
|