Method __construct

/**
 * Constructor.
 *
 * @param   integer         $total       The total number of items.
 * @param   integer         $limitstart  The offset of the item to start at.
 * @param   integer         $limit       The number of items to display per page.
 * @param   string          $prefix      The prefix used for request variables.
 * @param   CMSApplication  $app         The application object
 *
 * @since   1.5
 */
public function __construct($total, $limitstart, $limit, $prefix = '', CMSApplication $app = null)
{
    // Value/type checking.
    $this->total = (int) $total;
    $this->limitstart = (int) max($limitstart, 0);
    $this->limit = (int) max($limit, 0);
    $this->prefix = $prefix;
    $this->app = $app ?: Factory::getApplication();
    if ($this->limit > $this->total) {
        $this->limitstart = 0;
    }
    if (!$this->limit) {
        $this->limit = $total;
        $this->limitstart = 0;
    }
    /*
     * If limitstart is greater than total (i.e. we are asked to display records that don't exist)
     * then set limitstart to display the last natural page of results
     */
    if ($this->limitstart > $this->total - $this->limit) {
        $this->limitstart = max(0, (int) (ceil($this->total / $this->limit) - 1) * $this->limit);
    }
    // Set the total pages and current page values.
    if ($this->limit > 0) {
        $this->pagesTotal = (int) ceil($this->total / $this->limit);
        $this->pagesCurrent = (int) ceil(($this->limitstart + 1) / $this->limit);
    }
    // Set the pagination iteration loop values.
    $displayedPages = 10;
    $this->pagesStart = $this->pagesCurrent - $displayedPages / 2;
    if ($this->pagesStart < 1) {
        $this->pagesStart = 1;
    }
    if ($this->pagesStart + $displayedPages > $this->pagesTotal) {
        $this->pagesStop = $this->pagesTotal;
        if ($this->pagesTotal < $displayedPages) {
            $this->pagesStart = 1;
        } else {
            $this->pagesStart = $this->pagesTotal - $displayedPages + 1;
        }
    } else {
        $this->pagesStop = $this->pagesStart + $displayedPages - 1;
    }
    // If we are viewing all records set the view all flag to true.
    if ($limit === 0) {
        $this->viewall = true;
    }
}