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package PDF::Template::Factory; |
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use strict; |
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BEGIN { |
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use vars qw(%Manifest %isBuildable); |
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} |
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%Manifest = ( |
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# These are the instantiable nodes |
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'ALWAYS' => 'PDF::Template::Container::Always', |
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'CONDITIONAL' => 'PDF::Template::Container::Conditional', |
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'FONT' => 'PDF::Template::Container::Font', |
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'IF' => 'PDF::Template::Container::Conditional', |
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'LOOP' => 'PDF::Template::Container::Loop', |
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'PAGEDEF' => 'PDF::Template::Container::PageDef', |
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'PDFTEMPLATE' => 'PDF::Template::Container::PdfTemplate', |
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'ROW' => 'PDF::Template::Container::Row', |
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'SCOPE' => 'PDF::Template::Container::Scope', |
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'SECTION' => 'PDF::Template::Container::Section', |
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'HEADER' => 'PDF::Template::Container::Header', |
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'FOOTER' => 'PDF::Template::Container::Footer', |
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'BOOKMARK' => 'PDF::Template::Element::Bookmark', |
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'CIRCLE' => 'PDF::Template::Element::Circle', |
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'HR' => 'PDF::Template::Element::HorizontalRule', |
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'IMAGE' => 'PDF::Template::Element::Image', |
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'PAGEBREAK' => 'PDF::Template::Element::PageBreak', |
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'LINE' => 'PDF::Template::Element::Line', |
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'TEXTBOX' => 'PDF::Template::Element::TextBox', |
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'VAR' => 'PDF::Template::Element::Var', |
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'WEBLINK' => 'PDF::Template::Element::Weblink', |
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# These are the helper objects |
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'TEXTOBJECT' => 'PDF::Template::TextObject', |
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'CONTEXT' => 'PDF::Template::Context', |
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'ITERATOR' => 'PDF::Template::Iterator', |
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'MARGIN' => 'PDF::Template::Container::Margin', |
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'CONTAINER' => 'PDF::Template::Container', |
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'ELEMENT' => 'PDF::Template::Element', |
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'BASE' => 'PDF::Template::Base', |
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); |
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%isBuildable = map { $_ => 1 } qw( |
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ALWAYS |
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BOOKMARK |
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CIRCLE |
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CONDITIONAL |
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FONT |
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FOOTER |
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HEADER |
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HR |
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IF |
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IMAGE |
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LINE |
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LOOP |
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PAGEBREAK |
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PAGEDEF |
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PDFTEMPLATE |
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ROW |
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SCOPE |
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SECTION |
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TEXTBOX |
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VAR |
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WEBLINK |
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); |
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sub register |
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{ |
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my %params = @_; |
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my @param_names = qw(name class isa); |
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for (@param_names) |
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{ |
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unless ($params{$_}) |
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{ |
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warn "$_ was not supplied to register()\n"; |
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return 0; |
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} |
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} |
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my $name = uc $params{name}; |
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if (exists $Manifest{$name}) |
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{ |
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warn "$params{name} already exists in the manifest.\n"; |
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return 0; |
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} |
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my $isa = uc $params{isa}; |
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unless (exists $Manifest{$isa}) |
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{ |
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warn "$params{isa} does not exist in the manifest.\n"; |
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return 0; |
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} |
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$Manifest{$name} = $params{class}; |
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$isBuildable{$name} = 1; |
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{ |
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no strict 'refs'; |
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unshift @{"$params{class}::ISA"}, $Manifest{$isa}; |
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} |
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return 1; |
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} |
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sub create |
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{ |
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my $class = shift; |
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my $name = uc shift; |
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return unless exists $Manifest{$name}; |
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(my $filename = $Manifest{$name}) =~ s!::!/!g; |
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eval { |
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require "$filename.pm"; |
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}; if ($@) { |
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die "Cannot find or compile PM file for '$name' ($filename)\n"; |
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} |
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return $Manifest{$name}->new(@_); |
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} |
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sub create_node |
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{ |
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my $class = shift; |
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my $name = uc shift; |
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return unless exists $isBuildable{$name}; |
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return $class->create($name, @_); |
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} |
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sub isa |
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{ |
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return UNIVERSAL::isa($_[0], $Manifest{uc $_[1]}) |
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if @_ >= 2 && exists $Manifest{uc $_[1]}; |
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UNIVERSAL::isa(@_) |
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} |
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1; |
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__END__ |