PageBrowsingViewHelper.php

Go to the documentation of this file.

<?php
namespace TYPO3\CMS\IndexedSearch\ViewHelpers;

class PageBrowsingViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper {

    protected $prefixId = 'tx_indexedsearch';

    public function render($maximumNumberOfResultPages, $numberOfResults, $resultsPerPage, $currentPage = 0, $freeIndexUid = NULL) {
        if ($resultsPerPage <= 0) {
            $resultsPerPage = 10;
        }
        $pageCount = (int)ceil($numberOfResults / $resultsPerPage);
        // only show the result browser if more than one page is needed
        if ($pageCount === 1) {
            return '';
        }

        // Check if $currentPage is in range
        $currentPage = \TYPO3\CMS\Core\Utility\MathUtility::forceIntegerInRange($currentPage, 0, $pageCount - 1);

        $content = '';
        // prev page
        // show on all pages after the 1st one
        if ($currentPage > 0) {
            $label = \TYPO3\CMS\Extbase\Utility\LocalizationUtility::translate('displayResults.previous', 'IndexedSearch');
            $content .= '<li>' . $this->makecurrentPageSelector_link($label, $currentPage - 1, $freeIndexUid) . '</li>';
        }
        // Check if $maximumNumberOfResultPages is in range
        $maximumNumberOfResultPages = \TYPO3\CMS\Core\Utility\MathUtility::forceIntegerInRange($maximumNumberOfResultPages, 1, $pageCount, 10);
        // Assume $currentPage is in the middle and calculate the index limits of the result page listing
        $minPage = $currentPage - (int)floor($maximumNumberOfResultPages / 2);
        $maxPage = $minPage + $maximumNumberOfResultPages - 1;
        // Check if the indexes are within the page limits
        if ($minPage < 0) {
            $maxPage -= $minPage;
            $minPage = 0;
        } elseif ($maxPage >= $pageCount) {
            $minPage -= $maxPage - $pageCount + 1;
            $maxPage = $pageCount - 1;
        }
        $pageLabel = \TYPO3\CMS\Extbase\Utility\LocalizationUtility::translate('displayResults.page', 'IndexedSearch');
        for ($a = $minPage; $a <= $maxPage; $a++) {
            $label = trim($pageLabel . ' ' . ($a + 1));
            $label = $this->makecurrentPageSelector_link($label, $a, $freeIndexUid);
            if ($a === $currentPage) {
                $content .= '<li class="tx-indexedsearch-browselist-currentPage"><strong>' . $label . '</strong></li>';
            } else {
                $content .= '<li>' . $label . '</li>';
            }
        }
        // next link
        if ($currentPage < $pageCount - 1) {
            $label = \TYPO3\CMS\Extbase\Utility\LocalizationUtility::translate('displayResults.next', 'IndexedSearch');
            $content .= '<li>' . $this->makecurrentPageSelector_link($label, ($currentPage + 1), $freeIndexUid) . '</li>';
        }
        return '<ul class="tx-indexedsearch-browsebox">' . $content . '</ul>';
    }

    public function makecurrentPageSelector_link($str, $p, $freeIndexUid) {
        $onclick = 'document.getElementById(\'' . $this->prefixId . '_pointer\').value=\'' . $p . '\';';
        if ($freeIndexUid !== NULL) {
            $onclick .= 'document.getElementById(\'' . $this->prefixId . '_freeIndexUid\').value=\'' . rawurlencode($freeIndexUid) . '\';';
        }
        $onclick .= 'document.getElementById(\'' . $this->prefixId . '\').submit();return false;';
        return '<a href="#" onclick="' . htmlspecialchars($onclick) . '">' . $str . '</a>';
    }

}