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<?php |
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/* |
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* This file is part of the Sonata package. |
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* |
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* (c) Thomas Rabaix <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Sonata\DoctrinePHPCRAdminBundle\Datagrid; |
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use Doctrine\Common\Collections\ArrayCollection; |
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use Doctrine\ODM\PHPCR\Query\Query as PHPCRQuery; |
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class SimplePager extends Pager |
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{ |
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/** |
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* @var boolean |
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*/ |
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protected $haveToPaginate; |
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/** |
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* How many pages to look forward to create links to next pages. |
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* |
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* @var int |
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*/ |
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protected $threshold; |
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/** |
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* @var int |
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*/ |
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protected $thresholdCount; |
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/** |
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* The threshold parameter can be used to determine how far ahead the pager |
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* should fetch results. |
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* |
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* If set to 1 which is the minimal value the pager will generate a link to the next page |
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* If set to 2 the pager will generate links to the next two pages |
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* If set to 3 the pager will generate links to the next three pages |
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* etc. |
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* |
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* @param integer $maxPerPage Number of records to display per page |
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* @param int $threshold |
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*/ |
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public function __construct($maxPerPage = 10, $threshold = 2) |
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{ |
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parent::__construct($maxPerPage); |
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$this->setThreshold($threshold); |
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} |
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/** |
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* Returns the exact count when there is only one page or when the current |
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* equals the last page. |
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* |
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* In all other cases an estimate of the total count is returned. |
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* |
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* @return integer |
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*/ |
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public function getNbResults() |
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{ |
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$n = ceil(($this->getLastPage() -1) * $this->getMaxPerPage()); |
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if ($this->getLastPage() == $this->getPage()) { |
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return $n + $this->thresholdCount; |
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} |
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return $n; |
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} |
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/** |
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* Get all the results for the pager instance |
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* |
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* @param mixed $hydrationMode A hydration mode identifier |
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* |
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* @return array |
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*/ |
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public function getResults($hydrationMode = null) |
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{ |
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if (!$this->results) { |
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$this->results = $this->getQuery()->execute(array(), $hydrationMode); |
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$this->thresholdCount = count($this->results); |
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if (count($this->results) > $this->getMaxPerPage()) { |
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$this->haveToPaginate = true; |
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$this->results = new ArrayCollection($this->results->slice(0, $this->getMaxPerPage())); |
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} else { |
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$this->haveToPaginate = false; |
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} |
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} |
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return $this->results; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function haveToPaginate() |
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{ |
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return $this->haveToPaginate || $this->getPage() > 1; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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protected function resetIterator() |
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{ |
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parent::resetIterator(); |
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$this->haveToPaginate = false; |
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} |
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/** |
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* {@inheritDoc} |
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* |
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* @throws \RuntimeException the QueryBuilder is uninitialized. |
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*/ |
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public function init() |
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{ |
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if (!$this->getQuery()) { |
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throw new \RuntimeException("Uninitialized QueryBuilder"); |
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} |
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$this->resetIterator(); |
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if (0 == $this->getPage() || 0 == $this->getMaxPerPage()) { |
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$this->setLastPage(0); |
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$this->getQuery()->setFirstResult(0); |
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$this->getQuery()->setMaxResults(0); |
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} else { |
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$offset = ($this->getPage() - 1) * $this->getMaxPerPage(); |
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$this->getQuery()->setFirstResult($offset); |
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$maxOffset = $this->getThreshold() > 0 |
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? $this->getMaxPerPage() * $this->threshold + 1 : $this->getMaxPerPage() + 1; |
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$this->getQuery()->setMaxResults($maxOffset); |
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$this->initializeIterator(); |
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$t = (int) ceil($this->thresholdCount / $this->getMaxPerPage()) + $this->getPage() - 1; |
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$this->setLastPage($t); |
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} |
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} |
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/** |
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* Set how many pages to look forward to create links to next pages. |
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* |
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* @param int $threshold |
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*/ |
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public function setThreshold($threshold) |
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{ |
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$this->threshold = (int) $threshold; |
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} |
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/** |
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* @return int |
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*/ |
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public function getThreshold() |
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{ |
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return $this->threshold; |
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} |
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} |
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