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package PDF::API2::ViewerPreferences; |
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use strict; |
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use warnings; |
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our $VERSION = '2.044'; # VERSION |
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use Carp; |
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use PDF::API2::Basic::PDF::Utils; |
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use Scalar::Util qw(weaken); |
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our @CARP_NOT; |
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my @booleans = qw(HideToolbar HideMenubar HideWindowUI FitWindow CenterWindow |
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DisplayDocTitle PickTrayByPDFSize); |
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my @names = qw(NonFullScreenPageMode Direction Duplex PrintScaling |
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ViewArea ViewClip PrintArea PrintClip); |
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=head1 NAME |
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PDF::API2::ViewerPreferences - How the PDF should be displayed or printed |
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=head1 METHODS |
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=over |
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=cut |
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sub _snake_case { |
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my $name = shift(); |
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$name =~ s/^([A-Z]+)/lc($1)/e; |
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$name =~ s/([A-Z]+)/'_' . lc($1)/ge; |
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$name =~ s/pdfsize/pdf_size/; |
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return $name; |
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} |
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sub _camel_case { |
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my $name = shift(); |
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$name = ucfirst($name); |
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$name =~ s/_([a-z]+)/ucfirst($1)/ge; |
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$name =~ s/Ui$/UI/; |
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$name =~ s/Pdf/PDF/; |
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return $name; |
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} |
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=item $self = $class->new($pdf) |
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Creates a new ViewerPreferences object from a PDF::API2 object. |
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=cut |
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sub new { |
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my ($class, $pdf) = @_; |
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my $self = bless { pdf => $pdf }, $class; |
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weaken $self->{'pdf'}; |
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return $self; |
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} |
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=item %preferences = $self->get_preferences() |
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Returns a hash containing all of the viewer preferences that are defined in the |
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PDF. |
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=cut |
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sub get_preferences { |
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1
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my $self = shift(); |
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my $prefs = $self->{'pdf'}->{'catalog'}->{'ViewerPreferences'}; |
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return unless $prefs; |
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$prefs->realise(); |
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my %values; |
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foreach my $pref (@booleans) { |
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next unless $prefs->{$pref}; |
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$values{_snake_case($pref)} = $prefs->{$pref}->val() eq 'true' ? 1 : 0; |
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} |
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0
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foreach my $pref (@names) { |
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next unless $prefs->{$pref}; |
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if ($pref eq 'Direction') { |
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$values{'direction'} = lc($prefs->{$pref}->val()); |
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} |
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elsif ($pref eq 'Duplex') { |
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my $value = $prefs->{$pref}->val(); |
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$value =~ s/Flip//; |
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$value =~ s/Edge//; |
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$values{'duplex'} = _snake_case($value); |
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} |
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elsif ($pref eq 'NonFullScreenPageMode') { |
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my $value = _snake_case($prefs->{$pref}->val()); |
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$value =~ s/^use_//; |
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$value = 'optional_content' if $value eq 'oc'; |
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$values{'non_full_screen_page_mode'} = $value; |
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} |
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else { |
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$values{_snake_case($pref)} = _snake_case($prefs->{$pref}->val()); |
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} |
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} |
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if ($prefs->{'PrintPageRange'}) { |
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my @ranges = map { $_->val() } @{$prefs->{'PrintPageRange'}}; |
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101
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$values{'print_page_range'} = \@ranges; |
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} |
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if ($prefs->{'NumCopies'}) { |
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$values{'num_copies'} = $prefs->{'NumCopies'}->val(); |
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} |
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107
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return %values; |
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} |
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110
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=item $value = $self->get_preference($name) |
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Returns the value of the specified viewer preference if present, or C if |
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not. |
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115
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=cut |
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117
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sub get_preference { |
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1
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my ($self, $name) = @_; |
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my %values = $self->get_preferences(); |
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return $values{$name}; |
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} |
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123
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=item $self->set_preferences(%values) |
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125
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Sets one or more viewer preferences, as described in the preferences section |
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below. |
127
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128
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=cut |
129
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130
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sub _init_preferences { |
131
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172
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172
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294
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my $self = shift(); |
132
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172
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100
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480
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if ($self->{'pdf'}->{'catalog'}->{'ViewerPreferences'}) { |
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8
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27
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$self->{'pdf'}->{'catalog'}->{'ViewerPreferences'}->realise(); |
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} |
135
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else { |
136
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164
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431
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$self->{'pdf'}->{'catalog'}->{'ViewerPreferences'} = PDFDict(); |
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} |
138
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172
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658
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$self->{'pdf'}->{'pdf'}->out_obj($self->{'pdf'}->{'catalog'}); |
139
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172
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347
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return $self->{'pdf'}->{'catalog'}->{'ViewerPreferences'}; |
140
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} |
141
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142
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sub set_preferences { |
143
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172
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172
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1
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591
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my ($self, %values) = @_; |
144
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172
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453
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my $prefs = $self->_init_preferences(); |
145
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172
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746
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local @CARP_NOT = qw(PDF::API2); |
146
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172
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578
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foreach my $snake (keys %values) { |
147
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172
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419
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my $camel = _camel_case($snake); |
148
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172
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100
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507
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if ($camel eq 'NonFullScreenPageMode') { |
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50
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149
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169
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my $value = $values{$snake}; |
150
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169
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0
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404
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my $name = ($value eq 'none' ? 'UseNone' : |
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0
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0
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50
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151
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$value eq 'outlines' ? 'UseOutlines' : |
152
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$value eq 'thumbnails' ? 'UseThumbs' : |
153
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$value eq 'optional_content' ? 'UseOC' : |
154
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''); |
155
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169
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50
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396
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croak "Invalid value for $snake: $values{$snake}" unless $name; |
156
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169
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473
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$prefs->{$camel} = PDFName($name); |
157
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} |
158
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elsif ($camel eq 'Direction') { |
159
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0
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0
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my $name = $values{$snake}; |
160
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0
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0
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unless ($name =~ /^(?:L2R|R2L)$/i) { |
161
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0
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croak "Invalid value for $snake: $name"; |
162
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} |
163
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0
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$prefs->{$camel} = PDFName(uc $name); |
164
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} |
165
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elsif ($camel =~ /^(?:View|Print)(?:Area|Clip)$/) { |
166
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my $name = ($values{$snake} eq 'media_box' ? 'MediaBox' : |
167
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$values{$snake} eq 'crop_box' ? 'CropBox' : |
168
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$values{$snake} eq 'bleed_box' ? 'BleedBox' : |
169
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$values{$snake} eq 'trim_box' ? 'TrimBox' : |
170
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0
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0
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$values{$snake} eq 'art_box' ? 'ArtBox' : ''); |
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0
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171
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0
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0
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croak "Invalid value for $snake: $name" unless $name; |
172
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0
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0
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$prefs->{$camel} = PDFName($name); |
173
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} |
174
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elsif ($camel eq 'PrintScaling') { |
175
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0
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0
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my $value = $values{$snake}; |
176
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0
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0
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my $name = ($value eq 'none' ? 'None' : |
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0
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177
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$value eq 'app_default' ? 'AppDefault' : ''); |
178
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0
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0
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croak "Invalid value for $snake: $name" unless $name; |
179
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0
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0
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$prefs->{$camel} = PDFName($name); |
180
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} |
181
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elsif ($camel eq 'Duplex') { |
182
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3
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6
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my $value = $values{$snake}; |
183
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3
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50
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11
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my $name = ($value eq 'simplex' ? 'Simplex' : |
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100
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100
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184
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$value eq 'duplex_short' ? 'DuplexFlipShortEdge' : |
185
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$value eq 'duplex_long' ? 'DuplexFlipLongEdge' : ''); |
186
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3
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50
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8
|
croak "Invalid value for $snake: $value" unless $name; |
187
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3
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7
|
$prefs->{$camel} = PDFName($name); |
188
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} |
189
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elsif ($camel eq 'PrintPageRange') { |
190
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0
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0
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0
|
unless (ref($values{$snake}) eq 'ARRAY') { |
191
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0
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0
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croak "The value for $snake must be a reference to an array"; |
192
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} |
193
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0
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0
|
my @range = @{$values{$snake}}; |
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0
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0
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194
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0
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0
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0
|
unless (@range % 2 == 0) { |
195
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0
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0
|
croak "The value for $snake must contain pairs of page numbers"; |
196
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} |
197
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0
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0
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0
|
if (join('', @range) =~ /\D/) { |
198
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0
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0
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croak "The value for $snake may only contain page numbers"; |
199
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} |
200
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0
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0
|
$prefs->{$camel} = PDFArray(map { PDFNum($_) } @range); |
|
0
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0
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201
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} |
202
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elsif ($camel eq 'NumCopies') { |
203
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0
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0
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0
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unless ($values{$snake} =~ /^\d+$/) { |
204
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0
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0
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croak "$snake: $values{$snake} is not an integer"; |
205
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} |
206
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0
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0
|
$prefs->{$camel} = PDFNum($values{$snake}); |
207
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} |
208
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0
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0
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elsif (grep { $camel eq $_ } @booleans) { |
209
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0
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0
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0
|
$prefs->{$camel} = PDFBool($values{$snake} ? 1 : 0); |
210
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} |
211
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else { |
212
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0
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0
|
croak "Unrecognized viewer preference '$snake'"; |
213
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} |
214
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} |
215
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172
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884
|
return $self; |
216
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} |
217
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218
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=back |
219
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220
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=head1 PREFERENCES |
221
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222
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Viewer Preferences describe how the document should be presented on screen or in |
223
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print. Not all PDF viewers will respect these preferences. |
224
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225
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Boolean preferences default to false and take (or return) 0 or 1 as arguments. |
226
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227
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Bounding Box preferences take (or return) one of C, C, |
228
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C, C, or C. |
229
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230
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=over |
231
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232
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=item hide_toolbar (boolean) |
233
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234
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A flag specifying whether to hide the tool bars when the document is active. |
235
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236
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=item hide_menubar (boolean) |
237
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238
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A flag specifying whether to hide the menu bar when the document is active. |
239
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240
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=item hide_window_ui (boolean) |
241
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242
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A flag specifying whether to hide the user interface elements in the document's |
243
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window (such as scroll bars and navigation controls), leaving only the |
244
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document's contents displayed. |
245
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246
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=item fit_window (boolean) |
247
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248
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A flag specifying whether to resize the document's window to fit the size of the |
249
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first displayed page. |
250
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251
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=item center_window (boolean) |
252
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253
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A flag specifying whether to position the document's window in the center of the |
254
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screen. |
255
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256
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=item display_doc_title (boolean) |
257
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258
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A flag specifying whether the window's title bar should display the document |
259
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|
title taken from the Title entry of the document information directory. If |
260
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|
false, the title bar should instead display the name of the PDF file containing |
261
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|
the document. |
262
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263
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|
=item non_full_screen_page_mode (name) |
264
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265
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|
The document's page mode, specifying how to display the document on exiting |
266
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|
full-screen mode. Options are the same as C in L except |
267
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|
|
that the C and C options aren't supported. |
268
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269
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|
=item direction ('l2r' or 'r2l') |
270
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|
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|
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|
|
271
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|
|
The predominant reading order for text (left-to-right or right-to-left). |
272
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273
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|
|
This entry has no direct effect on the document's contents or page numbering but |
274
|
|
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|
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|
|
may be used to determine the relative positioning of pages when displayed |
275
|
|
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|
|
side-by-side or printed n-up. |
276
|
|
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|
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|
|
277
|
|
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|
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|
|
=item view_area (bounding box) |
278
|
|
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|
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|
|
279
|
|
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|
|
The name of the page boundary representing the area of a page that shall be |
280
|
|
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|
|
displayed when viewing the document on the screen. |
281
|
|
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|
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282
|
|
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|
|
=item view_clip (bounding box) |
283
|
|
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|
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|
|
284
|
|
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|
|
|
|
The name of the page boundary to which the contents of a page shall be clipped |
285
|
|
|
|
|
|
|
when viewing the document on the screen. |
286
|
|
|
|
|
|
|
|
287
|
|
|
|
|
|
|
=item print_area (bounding box) |
288
|
|
|
|
|
|
|
|
289
|
|
|
|
|
|
|
The name of the page boundary representing the area of a page that shall be |
290
|
|
|
|
|
|
|
rendered when printing the document. |
291
|
|
|
|
|
|
|
|
292
|
|
|
|
|
|
|
=item print_clip (bounding box) |
293
|
|
|
|
|
|
|
|
294
|
|
|
|
|
|
|
The name of the page boundary to which the contents of a page shall be clipped |
295
|
|
|
|
|
|
|
when printing the document. |
296
|
|
|
|
|
|
|
|
297
|
|
|
|
|
|
|
=item print_scaling ('none' or 'app_default') |
298
|
|
|
|
|
|
|
|
299
|
|
|
|
|
|
|
The page scaling option that shall be selected when a print dialog is displayed |
300
|
|
|
|
|
|
|
for this document. C represents no page scaling, and C |
301
|
|
|
|
|
|
|
represents the reader's default print scaling. |
302
|
|
|
|
|
|
|
|
303
|
|
|
|
|
|
|
=item duplex ('simplex', 'duplex_short', or 'duplex_long') |
304
|
|
|
|
|
|
|
|
305
|
|
|
|
|
|
|
The paper handling option that shall be used when printing the file from the |
306
|
|
|
|
|
|
|
print dialog. The duplex values represent whether the page should be flipped on |
307
|
|
|
|
|
|
|
its short edge or long edge, respectively. |
308
|
|
|
|
|
|
|
|
309
|
|
|
|
|
|
|
=item pick_tray_by_pdf_size (boolean) |
310
|
|
|
|
|
|
|
|
311
|
|
|
|
|
|
|
A flag specifying whether the PDF page size shall be used to select the input |
312
|
|
|
|
|
|
|
paper tray. This setting influences only the preset values used to populate the |
313
|
|
|
|
|
|
|
print dialog presented by the reader. |
314
|
|
|
|
|
|
|
|
315
|
|
|
|
|
|
|
=item print_page_rage (an array of integer pairs) |
316
|
|
|
|
|
|
|
|
317
|
|
|
|
|
|
|
The page numbers used to initialize the print dialog box when the file is |
318
|
|
|
|
|
|
|
printed. The array shall contain an even number of integers to be interpreted |
319
|
|
|
|
|
|
|
in pairs, with each pair specifying the first and last pages in a sub-range of |
320
|
|
|
|
|
|
|
pages to be printed. The first page of the PDF file shall be denoted by 1. |
321
|
|
|
|
|
|
|
|
322
|
|
|
|
|
|
|
=item num_copies (integer) |
323
|
|
|
|
|
|
|
|
324
|
|
|
|
|
|
|
The number of copies that shall be printed when the print dialog is opened for |
325
|
|
|
|
|
|
|
this file. |
326
|
|
|
|
|
|
|
|
327
|
|
|
|
|
|
|
=back |
328
|
|
|
|
|
|
|
|
329
|
|
|
|
|
|
|
=cut |
330
|
|
|
|
|
|
|
|
331
|
|
|
|
|
|
|
1; |