1 | ############################################################################## |
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2 | # |
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3 | # This library is free software; you can redistribute it and/or |
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4 | # modify it under the terms of the GNU Library General Public |
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5 | # License as published by the Free Software Foundation; either |
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6 | # version 2 of the License, or (at your option) any later version. |
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7 | # |
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8 | # This library is distributed in the hope that it will be useful, |
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9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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11 | # Library General Public License for more details. |
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12 | # |
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13 | # You should have received a copy of the GNU Library General Public |
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14 | # License along with this library; if not, write to the |
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15 | # Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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16 | # Boston, MA 02111-1307, USA. |
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17 | # |
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18 | # Jabber |
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19 | # Copyright (C) 1998-2004 Jabber Software Foundation http://jabber.org/ |
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20 | # |
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21 | ############################################################################## |
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22 | |
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23 | package XML::Stream::Parser::DTD; |
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24 | |
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25 | =head1 NAME |
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26 | |
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27 | XML::Stream::Parser::DTD - XML DTD Parser and Verifier |
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28 | |
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29 | =head1 SYNOPSIS |
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30 | |
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31 | This is a work in progress. I had need for a DTD parser and verifier |
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32 | and so am working on it here. If you are reading this then you are |
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33 | snooping. =) |
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34 | |
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35 | =head1 DESCRIPTION |
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36 | |
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37 | This module provides the initial code for a DTD parser and verifier. |
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38 | |
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39 | =head1 METHODS |
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40 | |
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41 | =head1 EXAMPLES |
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42 | |
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43 | =head1 AUTHOR |
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44 | |
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45 | By Ryan Eatmon in February of 2001 for http://jabber.org/ |
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46 | |
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47 | =head1 COPYRIGHT |
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48 | |
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49 | This module is free software; you can redistribute it and/or modify |
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50 | it under the same terms as Perl itself. |
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51 | |
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52 | =cut |
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53 | |
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54 | use strict; |
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55 | use vars qw( $VERSION ); |
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56 | |
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57 | $VERSION = "1.22"; |
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58 | |
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59 | sub new |
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60 | { |
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61 | my $self = { }; |
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62 | |
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63 | bless($self); |
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64 | |
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65 | my %args; |
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66 | while($#_ >= 0) { $args{ lc pop(@_) } = pop(@_); } |
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67 | |
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68 | $self->{URI} = $args{uri}; |
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69 | |
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70 | $self->{PARSING} = 0; |
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71 | $self->{DOC} = 0; |
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72 | $self->{XML} = ""; |
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73 | $self->{CNAME} = (); |
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74 | $self->{CURR} = 0; |
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75 | |
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76 | $self->{ENTITY}->{"<"} = "<"; |
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77 | $self->{ENTITY}->{">"} = ">"; |
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78 | $self->{ENTITY}->{"""} = "\""; |
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79 | $self->{ENTITY}->{"'"} = "'"; |
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80 | $self->{ENTITY}->{"&"} = "&"; |
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81 | |
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82 | $self->{HANDLER}->{startDocument} = sub{ $self->startDocument(@_); }; |
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83 | $self->{HANDLER}->{endDocument} = sub{ $self->endDocument(@_); }; |
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84 | $self->{HANDLER}->{startElement} = sub{ $self->startElement(@_); }; |
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85 | $self->{HANDLER}->{endElement} = sub{ $self->endElement(@_); }; |
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86 | |
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87 | $self->{STYLE} = "debug"; |
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88 | |
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89 | open(DTD,$args{uri}); |
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90 | my $dtd = join("",<DTD>); |
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91 | close(DTD); |
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92 | |
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93 | $self->parse($dtd); |
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94 | |
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95 | return $self; |
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96 | } |
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97 | |
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98 | |
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99 | sub parse |
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100 | { |
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101 | my $self = shift; |
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102 | my $xml = shift; |
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103 | |
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104 | while($xml =~ s/<\!--.*?-->//gs) {} |
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105 | while($xml =~ s/\n//g) {} |
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106 | |
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107 | $self->{XML} .= $xml; |
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108 | |
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109 | return if ($self->{PARSING} == 1); |
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110 | |
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111 | $self->{PARSING} = 1; |
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112 | |
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113 | if(!$self->{DOC} == 1) |
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114 | { |
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115 | my $start = index($self->{XML},"<"); |
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116 | |
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117 | if (substr($self->{XML},$start,3) =~ /^<\?x$/i) |
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118 | { |
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119 | my $close = index($self->{XML},"?>"); |
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120 | if ($close == -1) |
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121 | { |
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122 | $self->{PARSING} = 0; |
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123 | return; |
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124 | } |
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125 | $self->{XML} = substr($self->{XML},$close+2,length($self->{XML})-$close-2); |
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126 | } |
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127 | |
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128 | &{$self->{HANDLER}->{startDocument}}($self); |
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129 | $self->{DOC} = 1; |
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130 | } |
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131 | |
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132 | while(1) |
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133 | { |
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134 | |
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135 | if (length($self->{XML}) == 0) |
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136 | { |
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137 | $self->{PARSING} = 0; |
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138 | return; |
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139 | } |
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140 | |
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141 | my $estart = index($self->{XML},"<"); |
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142 | if ($estart == -1) |
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143 | { |
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144 | $self->{PARSING} = 0; |
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145 | return; |
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146 | } |
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147 | |
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148 | my $close = index($self->{XML},">"); |
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149 | my $dtddata = substr($self->{XML},$estart+1,$close-1); |
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150 | my $nextspace = index($dtddata," "); |
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151 | my $attribs; |
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152 | |
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153 | my $type = substr($dtddata,0,$nextspace); |
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154 | $dtddata = substr($dtddata,$nextspace+1,length($dtddata)-$nextspace-1); |
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155 | $nextspace = index($dtddata," "); |
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156 | |
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157 | if ($type eq "!ENTITY") |
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158 | { |
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159 | $self->entity($type,$dtddata); |
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160 | } |
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161 | else |
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162 | { |
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163 | my $tag = substr($dtddata,0,$nextspace); |
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164 | $dtddata = substr($dtddata,$nextspace+1,length($dtddata)-$nextspace-1); |
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165 | $nextspace = index($dtddata," "); |
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166 | |
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167 | $self->element($type,$tag,$dtddata) if ($type eq "!ELEMENT"); |
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168 | $self->attlist($type,$tag,$dtddata) if ($type eq "!ATTLIST"); |
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169 | } |
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170 | |
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171 | $self->{XML} = substr($self->{XML},$close+1,length($self->{XML})-$close-1); |
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172 | next; |
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173 | } |
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174 | } |
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175 | |
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176 | |
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177 | sub startDocument |
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178 | { |
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179 | my $self = shift; |
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180 | } |
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181 | |
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182 | |
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183 | sub endDocument |
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184 | { |
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185 | my $self = shift; |
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186 | } |
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187 | |
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188 | |
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189 | sub entity |
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190 | { |
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191 | my $self = shift; |
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192 | my ($type, $data) = @_; |
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193 | |
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194 | foreach my $entity (keys(%{$self->{ENTITY}})) |
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195 | { |
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196 | $data =~ s/$entity/$self->{ENTITY}->{$entity}/g; |
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197 | } |
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198 | |
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199 | my ($symbol,$tag,undef,$string) = ($data =~ /^\s*(\S+)\s+(\S+)\s+(\"|\')([^\3]*)\3\s*$/); |
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200 | $self->{ENTITY}->{"${symbol}${tag}\;"} = $string; |
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201 | } |
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202 | |
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203 | sub element |
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204 | { |
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205 | my $self = shift; |
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206 | my ($type, $tag, $data) = @_; |
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207 | |
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208 | foreach my $entity (keys(%{$self->{ENTITY}})) |
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209 | { |
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210 | $data =~ s/$entity/$self->{ENTITY}->{$entity}/g; |
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211 | } |
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212 | |
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213 | $self->{COUNTER}->{$tag} = 0 unless exists($self->{COUNTER}->{$tag}); |
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214 | |
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215 | $self->parsegrouping($tag,\$self->{ELEMENT}->{$tag},$data); |
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216 | $self->flattendata(\$self->{ELEMENT}->{$tag}); |
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217 | |
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218 | } |
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219 | |
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220 | |
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221 | sub flattendata |
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222 | { |
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223 | my $self = shift; |
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224 | my $dstr = shift; |
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225 | |
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226 | if ($$dstr->{type} eq "list") |
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227 | { |
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228 | foreach my $index (0..$#{$$dstr->{list}}) |
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229 | { |
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230 | $self->flattendata(\$$dstr->{list}->[$index]); |
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231 | } |
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232 | |
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233 | if (!exists($$dstr->{repeat}) && ($#{$$dstr->{list}} == 0)) |
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234 | { |
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235 | $$dstr = $$dstr->{list}->[0]; |
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236 | } |
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237 | } |
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238 | } |
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239 | |
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240 | sub parsegrouping |
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241 | { |
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242 | my $self = shift; |
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243 | my ($tag,$dstr,$data) = @_; |
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244 | |
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245 | $data =~ s/^\s*//; |
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246 | $data =~ s/\s*$//; |
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247 | |
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248 | if ($data =~ /[\*\+\?]$/) |
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249 | { |
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250 | ($$dstr->{repeat}) = ($data =~ /(.)$/); |
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251 | $data =~ s/.$//; |
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252 | } |
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253 | |
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254 | if ($data =~ /^\(.*\)$/) |
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255 | { |
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256 | my ($seperator) = ($data =~ /^\(\s*\S+\s*(\,|\|)/); |
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257 | $$dstr->{ordered} = "yes" if ($seperator eq ","); |
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258 | $$dstr->{ordered} = "no" if ($seperator eq "|"); |
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259 | |
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260 | my $count = 0; |
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261 | $$dstr->{type} = "list"; |
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262 | foreach my $grouping ($self->groupinglist($data,$seperator)) |
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263 | { |
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264 | $self->parsegrouping($tag,\$$dstr->{list}->[$count],$grouping); |
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265 | $count++; |
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266 | } |
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267 | } |
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268 | else |
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269 | { |
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270 | $$dstr->{type} = "element"; |
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271 | $$dstr->{element} = $data; |
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272 | $self->{COUNTER}->{$data} = 0 unless exists($self->{COUNTER}->{$data}); |
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273 | $self->{COUNTER}->{$data}++; |
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274 | $self->{CHILDREN}->{$tag}->{$data} = 1; |
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275 | } |
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276 | } |
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277 | |
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278 | |
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279 | sub attlist |
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280 | { |
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281 | my $self = shift; |
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282 | my ($type, $tag, $data) = @_; |
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283 | |
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284 | foreach my $entity (keys(%{$self->{ENTITY}})) |
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285 | { |
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286 | $data =~ s/$entity/$self->{ENTITY}->{$entity}/g; |
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287 | } |
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288 | |
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289 | while($data ne "") |
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290 | { |
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291 | my ($att) = ($data =~ /^\s*(\S+)/); |
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292 | $data =~ s/^\s*\S+\s*//; |
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293 | |
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294 | my $value; |
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295 | if ($data =~ /^\(/) |
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296 | { |
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297 | $value = $self->getgrouping($data); |
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298 | $data = substr($data,length($value)+1,length($data)); |
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299 | $data =~ s/^\s*//; |
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300 | $self->{ATTLIST}->{$tag}->{$att}->{type} = "list"; |
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301 | foreach my $val (split(/\s*\|\s*/,substr($value,1,length($value)-2))) { |
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302 | $self->{ATTLIST}->{$tag}->{$att}->{value}->{$val} = 1; |
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303 | } |
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304 | } |
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305 | else |
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306 | { |
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307 | ($value) = ($data =~ /^(\S+)/); |
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308 | $data =~ s/^\S+\s*//; |
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309 | $self->{ATTLIST}->{$tag}->{$att}->{type} = $value; |
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310 | } |
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311 | |
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312 | my $default; |
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313 | if ($data =~ /^\"|^\'/) |
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314 | { |
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315 | my($sq,$val) = ($data =~ /^(\"|\')([^\"\']*)\1/); |
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316 | $default = $val; |
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317 | $data =~ s/^$sq$val$sq\s*//; |
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318 | } |
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319 | else |
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320 | { |
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321 | ($default) = ($data =~ /^(\S+)/); |
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322 | $data =~ s/^\S+\s*//; |
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323 | } |
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324 | |
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325 | $self->{ATTLIST}->{$tag}->{$att}->{default} = $default; |
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326 | } |
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327 | } |
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328 | |
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329 | |
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330 | |
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331 | sub getgrouping |
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332 | { |
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333 | my $self = shift; |
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334 | my ($data) = @_; |
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335 | |
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336 | my $count = 0; |
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337 | my $parens = 0; |
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338 | foreach my $char (split("",$data)) |
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339 | { |
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340 | $parens++ if ($char eq "("); |
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341 | $parens-- if ($char eq ")"); |
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342 | $count++; |
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343 | last if ($parens == 0); |
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344 | } |
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345 | return substr($data,0,$count); |
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346 | } |
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347 | |
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348 | |
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349 | sub groupinglist |
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350 | { |
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351 | my $self = shift; |
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352 | my ($grouping,$seperator) = @_; |
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353 | |
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354 | my @list; |
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355 | my $item = ""; |
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356 | my $parens = 0; |
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357 | my $word = ""; |
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358 | $grouping = substr($grouping,1,length($grouping)-2) if ($grouping =~ /^\(/); |
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359 | foreach my $char (split("",$grouping)) |
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360 | { |
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361 | $parens++ if ($char eq "("); |
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362 | $parens-- if ($char eq ")"); |
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363 | if (($parens == 0) && ($char eq $seperator)) |
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364 | { |
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365 | push(@list,$word); |
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366 | $word = ""; |
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367 | } |
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368 | else |
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369 | { |
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370 | $word .= $char; |
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371 | } |
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372 | } |
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373 | push(@list,$word) unless ($word eq ""); |
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374 | return @list; |
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375 | } |
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376 | |
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377 | |
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378 | sub root |
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379 | { |
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380 | my $self = shift; |
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381 | my $tag = shift; |
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382 | my @root; |
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383 | foreach my $tag (keys(%{$self->{COUNTER}})) |
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384 | { |
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385 | push(@root,$tag) if ($self->{COUNTER}->{$tag} == 0); |
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386 | } |
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387 | |
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388 | print "ERROR: Too many root tags... Check the DTD...\n" |
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389 | if ($#root > 0); |
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390 | return $root[0]; |
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391 | } |
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392 | |
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393 | |
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394 | sub children |
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395 | { |
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396 | my $self = shift; |
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397 | my ($tag,$tree) = @_; |
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398 | |
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399 | return unless exists ($self->{CHILDREN}->{$tag}); |
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400 | return if (exists($self->{CHILDREN}->{$tag}->{EMPTY})); |
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401 | if (defined($tree)) |
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402 | { |
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403 | my @current; |
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404 | foreach my $current (&XML::Stream::GetXMLData("tree array",$tree,"*","","")) |
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405 | { |
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406 | push(@current,$$current[0]); |
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407 | } |
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408 | return $self->allowedchildren($self->{ELEMENT}->{$tag},\@current); |
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409 | } |
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410 | return $self->allowedchildren($self->{ELEMENT}->{$tag}); |
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411 | } |
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412 | |
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413 | |
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414 | sub allowedchildren |
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415 | { |
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416 | my $self = shift; |
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417 | my ($dstr,$current) = @_; |
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418 | |
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419 | my @allowed; |
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420 | |
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421 | if ($dstr->{type} eq "element") |
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422 | { |
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423 | my $test = (defined($current) && $#{@{$current}} > -1) ? $$current[0] : ""; |
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424 | shift(@{$current}) if ($dstr->{element} eq $test); |
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425 | if ($self->repeatcheck($dstr,$test) == 1) |
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426 | { |
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427 | return $dstr->{element}; |
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428 | } |
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429 | } |
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430 | else |
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431 | { |
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432 | foreach my $index (0..$#{$dstr->{list}}) |
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433 | { |
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434 | push(@allowed,$self->allowedchildren($dstr->{list}->[$index],$current)); |
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435 | } |
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436 | } |
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437 | |
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438 | return @allowed; |
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439 | } |
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440 | |
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441 | |
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442 | sub repeatcheck |
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443 | { |
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444 | my $self = shift; |
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445 | my ($dstr,$tag) = @_; |
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446 | |
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447 | $dstr = $self->{ELEMENT}->{$dstr} if exists($self->{ELEMENT}->{$dstr}); |
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448 | |
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449 | # print "repeatcheck: tag($tag)\n"; |
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450 | # print "repeatcheck: repeat($dstr->{repeat})\n" |
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451 | # if exists($dstr->{repeat}); |
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452 | |
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453 | my $return = 0; |
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454 | $return = ((!defined($tag) || |
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455 | ($tag eq $dstr->{element})) ? |
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456 | 0 : |
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457 | 1) |
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458 | if (!exists($dstr->{repeat}) || |
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459 | ($dstr->{repeat} eq "?")); |
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460 | $return = ((defined($tag) || |
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461 | (exists($dstr->{ordered}) && |
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462 | ($dstr->{ordered} eq "yes"))) ? |
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463 | 1 : |
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464 | 0) |
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465 | if (exists($dstr->{repeat}) && |
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466 | (($dstr->{repeat} eq "+") || |
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467 | ($dstr->{repeat} eq "*"))); |
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468 | |
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469 | # print "repeatcheck: return($return)\n"; |
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470 | return $return; |
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471 | } |
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472 | |
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473 | |
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474 | sub required |
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475 | { |
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476 | my $self = shift; |
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477 | my ($dstr,$tag,$count) = @_; |
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478 | |
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479 | $dstr = $self->{ELEMENT}->{$dstr} if exists($self->{ELEMENT}->{$dstr}); |
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480 | |
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481 | if ($dstr->{type} eq "element") |
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482 | { |
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483 | return 0 if ($dstr->{element} ne $tag); |
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484 | return 1 if !exists($dstr->{repeat}); |
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485 | return 1 if (($dstr->{repeat} eq "+") && ($count == 1)) ; |
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486 | } |
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487 | else |
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488 | { |
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489 | return 0 if (($dstr->{repeat} eq "*") || ($dstr->{repeat} eq "?")); |
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490 | my $test = 0; |
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491 | foreach my $index (0..$#{$dstr->{list}}) |
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492 | { |
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493 | $test = $test | $self->required($dstr->{list}->[$index],$tag,$count); |
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494 | } |
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495 | return $test; |
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496 | } |
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497 | return 0; |
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498 | } |
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499 | |
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500 | |
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501 | sub addchild |
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502 | { |
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503 | my $self = shift; |
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504 | my ($tag,$child,$tree) = @_; |
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505 | |
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506 | # print "addchild: tag($tag) child($child)\n"; |
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507 | |
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508 | my @current; |
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509 | if (defined($tree)) |
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510 | { |
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511 | # &Net::Jabber::printData("\$tree",$tree); |
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512 | |
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513 | @current = &XML::Stream::GetXMLData("index array",$tree,"*","",""); |
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514 | |
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515 | # &Net::Jabber::printData("\$current",\@current); |
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516 | } |
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517 | |
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518 | my @newBranch = $self->addchildrecurse($self->{ELEMENT}->{$tag},$child,\@current); |
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519 | |
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520 | return $tree unless ("@newBranch" ne ""); |
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521 | |
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522 | # &Net::Jabber::printData("\$newBranch",\@newBranch); |
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523 | |
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524 | my $location = shift(@newBranch); |
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525 | |
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526 | if ($location eq "end") |
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527 | { |
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528 | splice(@{$$tree[1]},@{$$tree[1]},0,@newBranch); |
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529 | } |
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530 | else |
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531 | { |
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532 | splice(@{$$tree[1]},$location,0,@newBranch); |
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533 | } |
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534 | return $tree; |
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535 | } |
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536 | |
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537 | |
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538 | sub addcdata |
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539 | { |
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540 | my $self = shift; |
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541 | my ($tag,$child,$tree) = @_; |
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542 | |
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543 | # print "addchild: tag($tag) child($child)\n"; |
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544 | |
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545 | my @current; |
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546 | if (defined($tree)) |
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547 | { |
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548 | # &Net::Jabber::printData("\$tree",$tree); |
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549 | |
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550 | @current = &XML::Stream::GetXMLData("index array",$tree,"*","",""); |
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551 | |
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552 | # &Net::Jabber::printData("\$current",\@current); |
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553 | } |
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554 | |
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555 | my @newBranch = $self->addchildrecurse($self->{ELEMENT}->{$tag},$child,\@current); |
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556 | |
---|
557 | return $tree unless ("@newBranch" ne ""); |
---|
558 | |
---|
559 | # &Net::Jabber::printData("\$newBranch",\@newBranch); |
---|
560 | |
---|
561 | my $location = shift(@newBranch); |
---|
562 | |
---|
563 | if ($location eq "end") |
---|
564 | { |
---|
565 | splice(@{$$tree[1]},@{$$tree[1]},0,@newBranch); |
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566 | } |
---|
567 | else |
---|
568 | { |
---|
569 | splice(@{$$tree[1]},$location,0,@newBranch); |
---|
570 | } |
---|
571 | return $tree; |
---|
572 | } |
---|
573 | |
---|
574 | |
---|
575 | sub addchildrecurse |
---|
576 | { |
---|
577 | my $self = shift; |
---|
578 | my ($dstr,$child,$current) = @_; |
---|
579 | |
---|
580 | # print "addchildrecurse: child($child) type($dstr->{type})\n"; |
---|
581 | |
---|
582 | if ($dstr->{type} eq "element") |
---|
583 | { |
---|
584 | # print "addchildrecurse: tag($dstr->{element})\n"; |
---|
585 | my $count = 0; |
---|
586 | while(($#{@{$current}} > -1) && ($dstr->{element} eq $$current[0])) |
---|
587 | { |
---|
588 | shift(@{$current}); |
---|
589 | shift(@{$current}); |
---|
590 | $count++; |
---|
591 | } |
---|
592 | if (($dstr->{element} eq $child) && |
---|
593 | ($self->repeatcheck($dstr,(($count > 0) ? $child : "")) == 1)) |
---|
594 | { |
---|
595 | my @return = ( "end" , $self->newbranch($child)); |
---|
596 | @return = ($$current[1], $self->newbranch($child)) |
---|
597 | if ($#{@{$current}} > -1); |
---|
598 | # print "addchildrecurse: Found the spot! (",join(",",@return),")\n"; |
---|
599 | |
---|
600 | return @return; |
---|
601 | } |
---|
602 | } |
---|
603 | else |
---|
604 | { |
---|
605 | foreach my $index (0..$#{$dstr->{list}}) |
---|
606 | { |
---|
607 | my @newBranch = $self->addchildrecurse($dstr->{list}->[$index],$child,$current); |
---|
608 | return @newBranch if ("@newBranch" ne ""); |
---|
609 | } |
---|
610 | } |
---|
611 | # print "Let's blow....\n"; |
---|
612 | return; |
---|
613 | } |
---|
614 | |
---|
615 | |
---|
616 | sub deletechild |
---|
617 | { |
---|
618 | my $self = shift; |
---|
619 | my ($tag,$parent,$parenttree,$tree) = @_; |
---|
620 | |
---|
621 | return $tree unless exists($self->{ELEMENT}->{$tag}); |
---|
622 | return $tree if $self->required($parent,$tag,&XML::Stream::GetXMLData("count",$parenttree,$tag)); |
---|
623 | |
---|
624 | return []; |
---|
625 | } |
---|
626 | |
---|
627 | |
---|
628 | |
---|
629 | sub newbranch |
---|
630 | { |
---|
631 | my $self = shift; |
---|
632 | my $tag = shift; |
---|
633 | |
---|
634 | $tag = $self->root() unless defined($tag); |
---|
635 | |
---|
636 | my @tree = (); |
---|
637 | |
---|
638 | return ("0","") if ($tag eq "#PCDATA"); |
---|
639 | |
---|
640 | push(@tree,$tag); |
---|
641 | push(@tree,[ {} ]); |
---|
642 | |
---|
643 | foreach my $att ($self->attribs($tag)) |
---|
644 | { |
---|
645 | $tree[1]->[0]->{$att} = "" |
---|
646 | if (($self->{ATTLIST}->{$tag}->{$att}->{default} eq "#REQUIRED") && |
---|
647 | ($self->{ATTLIST}->{$tag}->{$att}->{type} eq "CDATA")); |
---|
648 | } |
---|
649 | |
---|
650 | push(@{$tree[1]},$self->recursebranch($self->{ELEMENT}->{$tag})); |
---|
651 | return @tree; |
---|
652 | } |
---|
653 | |
---|
654 | |
---|
655 | sub recursebranch |
---|
656 | { |
---|
657 | my $self = shift; |
---|
658 | my $dstr = shift; |
---|
659 | |
---|
660 | my @tree; |
---|
661 | if (($dstr->{type} eq "element") && |
---|
662 | ($dstr->{element} ne "EMPTY")) |
---|
663 | { |
---|
664 | @tree = $self->newbranch($dstr->{element}) |
---|
665 | if (!exists($dstr->{repeat}) || |
---|
666 | ($dstr->{repeat} eq "+")); |
---|
667 | } |
---|
668 | else |
---|
669 | { |
---|
670 | foreach my $index (0..$#{$dstr->{list}}) |
---|
671 | { |
---|
672 | push(@tree,$self->recursebranch($dstr->{list}->[$index])) |
---|
673 | if (!exists($dstr->{repeat}) || |
---|
674 | ($dstr->{repeat} eq "+")); |
---|
675 | } |
---|
676 | } |
---|
677 | return @tree; |
---|
678 | } |
---|
679 | |
---|
680 | |
---|
681 | sub attribs |
---|
682 | { |
---|
683 | my $self = shift; |
---|
684 | my ($tag,$tree) = @_; |
---|
685 | |
---|
686 | return unless exists ($self->{ATTLIST}->{$tag}); |
---|
687 | |
---|
688 | if (defined($tree)) |
---|
689 | { |
---|
690 | my %current = &XML::Stream::GetXMLData("attribs",$tree,"","",""); |
---|
691 | return $self->allowedattribs($tag,\%current); |
---|
692 | } |
---|
693 | return $self->allowedattribs($tag); |
---|
694 | } |
---|
695 | |
---|
696 | |
---|
697 | sub allowedattribs |
---|
698 | { |
---|
699 | my $self = shift; |
---|
700 | my ($tag,$current) = @_; |
---|
701 | |
---|
702 | my %allowed; |
---|
703 | foreach my $att (keys(%{$self->{ATTLIST}->{$tag}})) |
---|
704 | { |
---|
705 | $allowed{$att} = 1 unless (defined($current) && |
---|
706 | exists($current->{$att})); |
---|
707 | } |
---|
708 | return sort {$a cmp $b} keys(%allowed); |
---|
709 | } |
---|
710 | |
---|
711 | |
---|
712 | sub attribvalue |
---|
713 | { |
---|
714 | my $self = shift; |
---|
715 | my $tag = shift; |
---|
716 | my $att = shift; |
---|
717 | |
---|
718 | return $self->{ATTLIST}->{$tag}->{$att}->{type} |
---|
719 | if ($self->{ATTLIST}->{$tag}->{$att}->{type} ne "list"); |
---|
720 | return sort {$a cmp $b} keys(%{$self->{ATTLIST}->{$tag}->{$att}->{value}}); |
---|
721 | } |
---|
722 | |
---|
723 | |
---|
724 | sub addattrib |
---|
725 | { |
---|
726 | my $self = shift; |
---|
727 | my ($tag,$att,$tree) = @_; |
---|
728 | |
---|
729 | return $tree unless exists($self->{ATTLIST}->{$tag}); |
---|
730 | return $tree unless exists($self->{ATTLIST}->{$tag}->{$att}); |
---|
731 | |
---|
732 | my $default = $self->{ATTLIST}->{$tag}->{$att}->{default}; |
---|
733 | $default = "" if ($default eq "#REQUIRED"); |
---|
734 | $default = "" if ($default eq "#IMPLIED"); |
---|
735 | |
---|
736 | $$tree[1]->[0]->{$att} = $default; |
---|
737 | |
---|
738 | return $tree; |
---|
739 | } |
---|
740 | |
---|
741 | |
---|
742 | sub attribrequired |
---|
743 | { |
---|
744 | my $self = shift; |
---|
745 | my ($tag,$att) = @_; |
---|
746 | |
---|
747 | return 0 unless exists($self->{ATTLIST}->{$tag}); |
---|
748 | return 0 unless exists($self->{ATTLIST}->{$tag}->{$att}); |
---|
749 | |
---|
750 | return 1 if ($self->{ATTLIST}->{$tag}->{$att}->{default} eq "#REQUIRED"); |
---|
751 | return 0; |
---|
752 | } |
---|
753 | |
---|
754 | |
---|
755 | sub deleteattrib |
---|
756 | { |
---|
757 | my $self = shift; |
---|
758 | my ($tag,$att,$tree) = @_; |
---|
759 | |
---|
760 | return $tree unless exists($self->{ATTLIST}->{$tag}); |
---|
761 | return $tree unless exists($self->{ATTLIST}->{$tag}->{$att}); |
---|
762 | |
---|
763 | return if $self->attribrequired($tag,$att); |
---|
764 | |
---|
765 | delete($$tree[1]->[0]->{$att}); |
---|
766 | |
---|
767 | return $tree; |
---|
768 | } |
---|
769 | |
---|