library/Zend/Pdf/Element/Numeric.php

   1 <?php
   2 /**
   3  * Zend Framework
   4  *
   5  * LICENSE
   6  *
   7  * This source file is subject to the new BSD license that is bundled
   8  * with this package in the file LICENSE.txt.
   9  * It is also available through the world-wide-web at this URL:
  10  * http://framework.zend.com/license/new-bsd
  11  * If you did not receive a copy of the license and are unable to
  12  * obtain it through the world-wide-web, please send an email
  13  * to license@zend.com so we can send you a copy immediately.
  14  *
  15  * @category   Zend
  16  * @package    Zend_Pdf
  17  * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
  18  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  19  * @version    $Id: Numeric.php 17182 2009-07-27 13:54:11Z alexander $
  20  */
  21
  22
  23 /** Zend_Pdf_Element */
  24 require_once 'Zend/Pdf/Element.php';
  25
  26
  27 /**
  28  * PDF file 'numeric' element implementation
  29  *
  30  * @category   Zend
  31  * @package    Zend_Pdf
  32  * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
  33  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  34  */
  35 class Zend_Pdf_Element_Numeric extends Zend_Pdf_Element
  36 {
  37     /**
  38      * Object value
  39      *
  40      * @var numeric
  41      */
  42     public $value;
  43
  44
  45     /**
  46      * Object constructor
  47      *
  48      * @param numeric $val
  49      * @throws Zend_Pdf_Exception
  50      */
  51     public function __construct($val)
  52     {
  53         if ( !is_numeric($val) ) {
  54             require_once 'Zend/Pdf/Exception.php';
  55             throw new Zend_Pdf_Exception('Argument must be numeric');
  56         }
  57
  58         $this->value = $val;
  59     }
  60
  61
  62     /**
  63      * Return type of the element.
  64      *
  65      * @return integer
  66      */
  67     public function getType()
  68     {
  69         return Zend_Pdf_Element::TYPE_NUMERIC;
  70     }
  71
  72
  73     /**
  74      * Return object as string
  75      *
  76      * @param Zend_Pdf_Factory $factory
  77      * @return string
  78      */
  79     public function toString($factory = null)
  80     {
  81         if (is_integer($this->value)) {
  82             return (string)$this->value;
  83         }
  84
  85         /**
  86          * PDF doesn't support exponental format.
  87          * Fixed point format must be used instead
  88          */
  89         $prec = 0; $v = $this->value;
  90         while (abs( floor($v) - $v ) > 1e-10) {
  91             $prec++; $v *= 10;
  92         }
  93         return sprintf("%.{$prec}F", $this->value);
  94     }
  95 }