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package Spreadsheet::WriteExcel::Worksheet::SheetProtection; |
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use 5.005; |
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use strict; |
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use vars '$VERSION'; |
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$VERSION = '0.03'; |
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BEGIN { |
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use Spreadsheet::WriteExcel::Worksheet; |
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no strict 'refs'; |
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## HACK ALERT! |
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## Add a _store_eof method to Spreadsheet::WriteExcel::Worksheet to be able to |
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## add the SHEETPROTECTION record when streaming out file |
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*{"Spreadsheet::WriteExcel::Worksheet::_store_eof"} = sub { |
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_store_sheet_protection(@_); |
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Spreadsheet::WriteExcel::BIFFwriter::_store_eof(@_); |
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} ; |
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## Add sheet_protection method |
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*{"Spreadsheet::WriteExcel::Worksheet::sheet_protection"} = \&sheet_protection; |
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} |
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=head1 NAME |
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Spreadsheet::WriteExcel::Worksheet::SheetProtection - Sheet Protection extension |
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for Spreadsheet::WriteExcel::Worksheet |
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=head1 SYNOPSIS |
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use Spreadsheet::WriteExcel; |
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use Spreadsheet::WriteExcel::Worksheet::SheetProtection; |
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my $workbook = new Spreadsheet::WriteExcel("file.xls"); |
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my $worksheet = $workbook->add_worksheet; |
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... |
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# Protect workseet |
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$worksheet->protect; |
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## Specify protection settings |
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## Disallow selection of locked cells but allow column formatting |
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$worksheet->sheet_protection( |
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-select_locked_cells => 0, |
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-format_columns => 1 ); |
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=head1 DESCRIPTION |
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This module allows you to specify the sheet protection attribute available in recent |
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versions of Microsoft Excel (Menu item: Tools > Protection > Protect Sheet...). |
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It extends the L class by adding a |
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C method which you use to specify the protection attributes. |
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=head2 Protection Flags |
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The following flags can be set (or cleared) to specify which aspects of a |
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worksheet are protected. |
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SelectLockedCells (Default set) |
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SelectUnlockedCells (Default set) |
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FormatCells |
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FormatColumns |
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FormatRows |
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InsertColumns |
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InsertRows |
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InsertHyperlinks |
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DeleteColumns |
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DeleteRows |
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Sort |
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UseAutoFilters |
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UsePivotTableReports |
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EditObjects |
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EditScenarios |
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The flag names are case insensitive and non-letter characters are ignored, so |
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the following are all valid and equivalent: |
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SelectLockedCells |
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"select locked cells" |
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-select_locked_cells |
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=cut |
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my $default_protection = 0x4400; ## 'Select Locked Cells' and 'Select Unlocked Cells' |
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my %protection_flags = ( |
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EDITOBJECTS => 0x0001, |
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EDITSCENARIOS => 0x0002, |
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FORMATCELLS => 0x0004, |
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FORMATCOLUMNS => 0x0008, |
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FORMATROWS => 0x0010, |
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INSERTCOLUMNS => 0x0020, |
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INSERTROWS => 0x0040, |
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INSERTHYPERLINKS => 0x0080, |
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DELETECOLUMNS => 0x0100, |
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DELETEROWS => 0x0200, |
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SELECTLOCKEDCELLS => 0x0400, |
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SORT => 0x0800, |
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USEAUTOFILTERS => 0x1000, |
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USEPIVOTTABLEREPORTS => 0x2000, |
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SELECTUNLOCKEDCELLS => 0x4000 |
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); |
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=head1 METHODS |
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=head2 sheet_protection() |
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The sheet_protection method sets or returns the current sheetprotection settings. |
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print "0x%04x\n", $worksheet->sheet_protection; ## Default protection is 0x4400 |
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## Allow column formatting but disallow selection of locked cells |
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$worksheet->sheet_protection(0x4008); |
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print "0x%04x\n", $worksheet->sheet_protection; ## Protection is now 0x4008 |
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Protection settings can also be specified as a hash. If the value is true, the |
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specified protection is enabled, otherwise it's disabled. |
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## Allow column formatting but disallow selection of locked cells |
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$worksheet->sheet_protection( |
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-select_locked_cells => 0, |
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-format_columns => 1 ); |
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print "0x%04x\n", $worksheet->sheet_protection; ## Protection is now 0x4008 |
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$worksheet->sheet_protection( -sort => 1 ); |
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print "0x%04x\n", $worksheet->sheet_protection; ## Protection is now 0x4808 |
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=cut |
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sub sheet_protection { |
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my $self = shift; |
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my $protection = defined($self->{_sheet_protection}) |
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? $self->{_sheet_protection} : $default_protection; |
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return $protection unless @_; |
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if(scalar (@_) == 1) { |
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$protection = shift; |
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} else { |
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my %settings = @_; |
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while (my ($flag, $value) = each %settings) { |
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my $key = $flag; |
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$key =~ s/[^a-z]//gi; # Normalize |
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$key =~ tr/a-z/A-Z/; |
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my $mask = $protection_flags{$key} or die "Unkown protection setting '$flag'"; |
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if($value) { |
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$protection |= $mask; |
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} else { |
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$protection &= ~$mask; |
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} |
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} |
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} |
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$protection &= 0xffff; |
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$self->{_sheet_protection} = $protection; |
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} |
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sub _store_sheet_protection { |
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my $self = shift; |
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# Exit unless sheet protection has been specified |
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return if $self->sheet_protection == $default_protection; |
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my $record = 0x0867; # Record identifier |
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my $data = ''; |
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$data = pack("v", $record); # Repeated record identifier |
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$data .= pack "x10"; # Not used (OpenOffice spec incorrectly claims 9 bytes) |
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$data .= pack "C7", 0x02, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff; # Unkown data (OpenOffice spec incorrect) |
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$data .= pack "v", $self->{_sheet_protection}; |
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$data .= pack "x2"; # Not used |
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my $header = pack("vv", $record, length($data)); |
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$self->_append($header, $data); |
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} |
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=head1 CAVEATS |
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This module depends on the internal workings of L and has |
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only been tested with version 2.13. It may or may not work with previous version. |
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It would be better if the functionality of this module were directly incorporated |
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into Spreadsheet::WriteExcel::Worksheet, when that happens this module will become |
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obsolete. |
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=head1 SEE ALSO |
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L and L |
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The BIFF record format is based on documentation in L. |
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However, that documentation (as of 5/29/2005) contains some errors. |
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=head1 AUTHOR |
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Stepan Riha, Esriha@cpan.org |
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=head1 COPYRIGHT AND LICENSE |
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Copyright 2005 by Stepan Riha |
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This library is free software; you can redistribute it and/or modify |
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it under the same terms as Perl itself. |
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=cut |
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1; |
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__END__ |