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webgui/lib/WebGUI/Paginator.pm
JT Smith e4d1d494e0 fixed bug 664327
2003-01-11 16:43:46 +00:00

510 lines
12 KiB
Perl
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package WebGUI::Paginator;
=head1 LEGAL
-------------------------------------------------------------------
WebGUI is Copyright 2001-2003 Plain Black LLC.
-------------------------------------------------------------------
Please read the legal notices (docs/legal.txt) and the license
(docs/license.txt) that came with this distribution before using
this software.
-------------------------------------------------------------------
http://www.plainblack.com info@plainblack.com
-------------------------------------------------------------------
=cut
use strict;
use WebGUI::International;
use WebGUI::Session;
use WebGUI::URL;
=head1 NAME
Package WebGUI::Paginator
=head1 DESCRIPTION
Package that paginates rows of arbitrary data for display on the web.
=head1 SYNOPSIS
use WebGUI::Paginator;
$p = WebGUI::Paginator->new("/index.pl/page_name?this=that",\@row);
$p->setDataByQuery($sql);
$html = $p->getBar;
$html = $p->getBarAdvanced;
$html = $p->getBarSimple;
$html = $p->getBarTraditional;
$html = $p->getFirstPageLink;
$html = $p->getLastPageLink;
$html = $p->getNextPageLink;
$integer = $p->getNumberOfPages;
$html = $p->getPage;
$arrayRef = $p->getPageData;
$integer = $p->getPageNumber;
$html = $p->getPageLinks;
$html = $p->getPreviousPageLink;
=head1 METHODS
These methods are available from this class:
=cut
#-------------------------------------------------------------------
=head2 getBar ( [ pageNumber ] )
Returns the pagination bar including First, Previous, Next, and last links. If there's only one page, nothing is returned.
=over
=item pageNumber
Defaults to the page you're currently viewing. This is mostly here as an override and probably has no real use.
=back
=cut
sub getBar {
my ($output);
if ($_[0]->getNumberOfPages > 1) {
$output = '<div class="pagination">';
$output .= $_[0]->getFirstPageLink($_[1]);
$output .= ' &middot; ';
$output .= $_[0]->getPreviousPageLink($_[1]);
$output .= ' &middot; ';
$output .= $_[0]->getNextPageLink($_[1]);
$output .= ' &middot; ';
$output .= $_[0]->getLastPageLink($_[1]);
$output .= '</div>';
return $output;
} else {
return "";
}
}
#-------------------------------------------------------------------
=head2 getBarAdvanced ( [ pageNumber ] )
Returns the pagination bar including First, Previous, Page Numbers, Next, and Last links. If there's only one page, nothing is returned.
=over
=item pageNumber
Defaults to the page you're currently viewing. This is mostly here as an override and probably has no real use.
=back
=cut
sub getBarAdvanced {
my ($output);
if ($_[0]->getNumberOfPages > 1) {
$output = '<div class="pagination">';
$output .= $_[0]->getFirstPageLink($_[1]);
$output .= ' &middot; ';
$output .= $_[0]->getPreviousPageLink($_[1]);
$output .= ' &middot; ';
$output .= $_[0]->getPageLinks($_[1]);
$output .= ' &middot; ';
$output .= $_[0]->getNextPageLink($_[1]);
$output .= ' &middot; ';
$output .= $_[0]->getLastPageLink($_[1]);
$output .= '</div>';
return $output;
} else {
return "";
}
}
#-------------------------------------------------------------------
=head2 getBarSimple ( [ pageNumber ] )
Returns the pagination bar including only Previous and Next links. If there's only one page, nothing is returned.
=over
=item pageNumber
Defaults to the page you're currently viewing. This is mostly here as an override and probably has no real use.
=back
=cut
sub getBarSimple {
my ($output);
if ($_[0]->getNumberOfPages > 1) {
$output = '<div class="pagination">';
$output .= $_[0]->getPreviousPageLink($_[1]);
$output .= ' &middot; ';
$output .= $_[0]->getNextPageLink($_[1]);
$output .= '</div>';
return $output;
} else {
return "";
}
}
#-------------------------------------------------------------------
=head2 getBarTraditional ( [ pageNumber ] )
Returns the pagination bar including Previous, Page Numbers, and Next links. If there's only one page, nothing is returned.
=over
=item pageNumber
Defaults to the page you're currently viewing. This is mostly here as an override and probably has no real use.
=back
=cut
sub getBarTraditional {
my ($output);
if ($_[0]->getNumberOfPages > 1) {
$output = '<div class="pagination">';
$output .= $_[0]->getPreviousPageLink($_[1]);
$output .= ' &middot; ';
$output .= $_[0]->getPageLinks($_[1]);
$output .= ' &middot; ';
$output .= $_[0]->getNextPageLink($_[1]);
$output .= '</div>';
return $output;
} else {
return "";
}
}
#-------------------------------------------------------------------
=head2 getFirstPageLink ( [ pageNumber ] )
Returns a link to the first page's data.
=over
=item pageNumber
Defaults to the page you're currently viewing. This is mostly here as an override and probably has no real use.
=back
=cut
sub getFirstPageLink {
my ($text, $pn);
$pn = $_[1] || $_[0]->getPageNumber;
$text = '|&lt;'.WebGUI::International::get(404);
if ($pn > 1) {
return '<a href="'.
WebGUI::URL::append($_[0]->{_url},($_[0]->{_formVar}.'=1'))
.'">'.$text.'</a>';
} else {
return $text;
}
}
#-------------------------------------------------------------------
=head2 getLastPageLink ( [ pageNumber ] )
Returns a link to the last page's data.
=over
=item pageNumber
Defaults to the page you're currently viewing. This is mostly here as an override and probably has no real use.
=back
=cut
sub getLastPageLink {
my ($text, $pn);
$pn = $_[1] || $_[0]->getPageNumber;
$text = WebGUI::International::get(405).'&gt;|';
if ($pn != $_[0]->getNumberOfPages) {
return '<a href="'.
WebGUI::URL::append($_[0]->{_url},($_[0]->{_formVar}.'='.$_[0]->getNumberOfPages))
.'">'.$text.'</a>';
} else {
return $text;
}
}
#-------------------------------------------------------------------
=head2 getNextPageLink ( [ pageNumber ] )
Returns a link to the next page's data.
=over
=item pageNumber
Defaults to the page you're currently viewing. This is mostly here as an override and probably has no real use.
=back
=cut
sub getNextPageLink {
my ($text, $pn);
$pn = $_[1] || $_[0]->getPageNumber;
$text = WebGUI::International::get(92).'&raquo;';
if ($pn < $_[0]->getNumberOfPages) {
return '<a href="'.WebGUI::URL::append($_[0]->{_url},($_[0]->{_formVar}.'='.($pn+1))).'">'.$text.'</a>';
} else {
return $text;
}
}
#-------------------------------------------------------------------
=head2 getNumberOfPages ( )
Returns the number of pages in this paginator.
=cut
sub getNumberOfPages {
my $pageCount = int(($#{$_[0]->{_rowRef}}+1)/$_[0]->{_rpp});
$pageCount++ unless (($#{$_[0]->{_rowRef}}+1)%$_[0]->{_rpp} == 0);
return $pageCount;
}
#-------------------------------------------------------------------
=head2 getPage ( [ pageNumber ] )
Returns the data from the page specified as a string.
NOTE: This is really only useful if you passed in an array reference of strings when you created this object.
=over
=item pageNumber
Defaults to the page you're currently viewing. This is mostly here as an override and probably has no real use.
=back
=cut
sub getPage {
return join("",@{$_[0]->getPageData($_[1])});
}
#-------------------------------------------------------------------
=head2 getPageData ( [ pageNumber ] )
Returns the data from the page specified as an array reference.
=over
=item pageNumber
Defaults to the page you're currently viewing. This is mostly here as an override and probably has no real use.
=back
=cut
sub getPageData {
my ($i, @pageRows, $allRows, $pageCount, $pageNumber, $rowsPerPage, $pageStartRow, $pageEndRow);
$pageNumber = $_[1] || $_[0]->getPageNumber;
$pageCount = $_[0]->getNumberOfPages;
return [] if ($pageNumber > $pageCount);
$rowsPerPage = $_[0]->{_rpp};
$pageStartRow = ($pageNumber*$rowsPerPage)-$rowsPerPage;
$pageEndRow = $pageNumber*$rowsPerPage;
$allRows = $_[0]->{_rowRef};
for ($i=$pageStartRow; $i<$pageEndRow; $i++) {
$pageRows[$i-$pageStartRow] = $allRows->[$i] if ($i <= $#{$_[0]->{_rowRef}});
}
return \@pageRows;
}
#-------------------------------------------------------------------
=head2 getPageNumber ( )
Returns the current page number. If no page number can be found then it returns 1.
=cut
sub getPageNumber {
return $_[0]->{_pn};
}
#-------------------------------------------------------------------
=head2 getPageLinks ( [ pageNumber ] )
Returns links to all pages in this paginator.
=over
=item pageNumber
Defaults to the page you're currently viewing. This is mostly here as an override and probably has no real use.
=back
=cut
sub getPageLinks {
my ($i, $output, $pn);
$pn = $_[1] || $_[0]->getPageNumber;
for ($i=0; $i<$_[0]->getNumberOfPages; $i++) {
if ($i+1 == $pn) {
$output .= ' '.($i+1).' ';
} else {
$output .= ' <a href="'.
WebGUI::URL::append($_[0]->{_url},($_[0]->{_formVar}.'='.($i+1)))
.'">'.($i+1).'</a> ';
}
}
return $output;
}
#-------------------------------------------------------------------
=head2 getPreviousPageLink ( [ pageNumber ] )
Returns a link to the previous page's data.
=over
=item pageNumber
Defaults to the page you're currently viewing. This is mostly here as an override and probably has no real use.
=back
=cut
sub getPreviousPageLink {
my ($text, $pn);
$pn = $_[1] || $_[0]->getPageNumber;
$text = '&laquo;'.WebGUI::International::get(91);
if ($pn > 1) {
return '<a href="'.WebGUI::URL::append($_[0]->{_url},($_[0]->{_formVar}.'='.($pn-1))).'">'.$text.'</a>';
} else {
return $text;
}
}
#-------------------------------------------------------------------
=head2 new ( currentURL, rowArrayRef [, paginateAfter, pageNumber, formVar ] )
Constructor.
=over
=item currentURL
The URL of the current page including attributes. The page number will be appended to this in all links generated by the paginator.
=item rowArrayRef
An array reference to all the rows of data for this page.
=item paginateAfter
The number of rows to display per page. If left blank it defaults to 50.
=item pageNumber
By default the paginator uses a form variable of "pn" to determine the page number. If you wish it to use some other variable, then specify the page number here.
=item formVar
Specify the form variable the paginator should use in it's links. Defaults to "pn".
=back
=cut
sub new {
my ($class, $currentURL, $rowsPerPage, $rowRef, $formVar, $pageRef, $pn);
$class = $_[0];
$currentURL = $_[1];
$rowRef = $_[2];
$rowsPerPage = $_[3] || 25;
$formVar = $_[5] || "pn";
$pn = $_[4] || $session{form}{$formVar} || 1;
bless {_url => $currentURL, _rpp => $rowsPerPage, _rowRef => $rowRef, _formVar => $formVar, _pn => $pn}, $class;
}
#-------------------------------------------------------------------
=head2 setDataByQuery ( query [, dbh ] )
Retrieves a data set from a database and replaces whatever data set was passed in through the constructor.
NOTE: This retrieves only the current page's data for efficiency.
=over
=item query
An SQL query that will retrieve a data set.
=item dbh
A DBI-style database handler. Defaults to the WebGUI site handler.
=back
=cut
sub setDataByQuery {
my ($sth, $pageCount, $rowCount, $dbh, $sql, $self, @row, $data);
($self, $sql, $dbh) = @_;
$dbh ||= $session{dbh};
$sth = WebGUI::SQL->read($sql);
$pageCount = 1;
while ($data = $sth->hashRef) {
$rowCount++;
if ($rowCount/$self->{_rpp} > $pageCount) {
$pageCount++;
}
if ($pageCount == $self->getPageNumber) {
push(@row,$data);
} else {
push(@row,{});
}
}
$sth->finish;
$self->{_rowRef} = \@row;
}
1;
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