<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * TCPDF wrapper class.
 *
 * @package PhpMyAdmin
 */
if (! defined('PHPMYADMIN')) {
	exit;
}

require_once TCPDF_INC;

/**
 * PDF font to use.
 */
define('PMA_PDF_FONT', 'DejaVuSans');

/**
 * PDF export base class providing basic configuration.
 *
 * @package PhpMyAdmin
 */
class PMA_PDF extends TCPDF
{
	var $footerset;
	var $Alias = array();

	/**
	 * Constructs PDF and configures standard parameters.
	 *
	 * @param string  $orientation page orientation
	 * @param string  $unit		   unit
	 * @param string  $format	   the format used for pages
	 * @param boolean $unicode	   true means that the input text is unicode
	 * @param string  $encoding	   charset encoding; default is UTF-8.
	 * @param boolean $diskcache   if true reduce the RAM memory usage by caching
	 *							   temporary data on filesystem (slower).
	 * @param boolean $pdfa		   If TRUE set the document to PDF/A mode.
	 *
	 * @access public
	 */
	public function __construct($orientation = 'P', $unit = 'mm', $format = 'A4',
		$unicode = true, $encoding = 'UTF-8', $diskcache = false, $pdfa=false
	) {
		parent::__construct(
			$orientation, $unit, $format, $unicode,
			$encoding, $diskcache, $pdfa
		);
		$this->SetAuthor('phpMyAdmin ' . PMA_VERSION);
		$this->AddFont('DejaVuSans', '', 'dejavusans.php');
		$this->AddFont('DejaVuSans', 'B', 'dejavusansb.php');
		$this->SetFont(PMA_PDF_FONT, '', 14);
		$this->setFooterFont(array(PMA_PDF_FONT, '', 14));
	}

	/**
	 * This function must be named "Footer" to work with the TCPDF library
	 *
	 * @return void
	 */
	function Footer()
	{
		// Check if footer for this page already exists
		if (!isset($this->footerset[$this->page])) {
			$this->SetY(-15);
			$this->SetFont(PMA_PDF_FONT, '', 14);
			$this->Cell(
				0, 6,
				__('Page number:') . ' '
				. $this->getAliasNumPage() . '/' .	$this->getAliasNbPages(),
				'T', 0, 'C'
			);
			$this->Cell(0, 6, PMA_Util::localisedDate(), 0, 1, 'R');
			$this->SetY(20);

			// set footerset
			$this->footerset[$this->page] = 1;
		}
	}

	/**
	 * Function to set alias which will be expanded on page rendering.
	 *
	 * @param string $name	name of the alias
	 * @param string $value value of the alias
	 *
	 * @return void
	 */
	function SetAlias($name, $value)
	{
		$name = TCPDF_FONTS::UTF8ToUTF16BE(
			$name, false, true, $this->CurrentFont
		);
		$this->Alias[$name] = TCPDF_FONTS::UTF8ToUTF16BE(
			$value, false, true, $this->CurrentFont
		);
	}

	/**
	 * Improved with alias expanding.
	 *
	 * @return void
	 */
	function _putpages()
	{
		if (count($this->Alias) > 0) {
			$nbPages = count($this->pages);
			for ($n = 1; $n <= $nbPages; $n++) {
				$this->pages[$n] = strtr($this->pages[$n], $this->Alias);
			}
		}
		parent::_putpages();
	}

	/**
	 * Displays an error message
	 *
	 * @param string $error_message the error message
	 *
	 * @return void
	 */
	function Error($error_message = '')
	{
		PMA_Message::error(
			__('Error while creating PDF:') . ' ' . $error_message
		)->display();
		exit;
	}

	/**
	 * Sends file as a download to user.
	 *
	 * @param string $filename file name
	 *
	 * @return void
	 */
	function Download($filename)
	{
		$pdfData = $this->getPDFData();
		PMA_Response::getInstance()->disable();
		PMA_downloadHeader(
			$filename,
			'application/pdf',
			/*overload*/mb_strlen($pdfData)
		);
		echo $pdfData;
	}
}
