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1 <?php |
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2 /** |
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3 * Zend Framework |
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4 * |
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5 * LICENSE |
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6 * |
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7 * This source file is subject to the new BSD license that is bundled |
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8 * with this package in the file LICENSE.txt. |
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9 * It is also available through the world-wide-web at this URL: |
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10 * http://framework.zend.com/license/new-bsd |
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11 * If you did not receive a copy of the license and are unable to |
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12 * obtain it through the world-wide-web, please send an email |
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13 * to license@zend.com so we can send you a copy immediately. |
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14 * |
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15 * @category Zend |
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16 * @package Zend_Pdf |
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17 * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com) |
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18 * @license http://framework.zend.com/license/new-bsd New BSD License |
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19 * @version $Id: Resource.php 22909 2010-08-27 19:57:48Z alexander $ |
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20 */ |
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21 |
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22 |
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23 /** |
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24 * PDF file Resource abstraction |
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25 * |
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26 * @package Zend_Pdf |
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27 * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com) |
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28 * @license http://framework.zend.com/license/new-bsd New BSD License |
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29 */ |
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30 abstract class Zend_Pdf_Resource |
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31 { |
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32 /** |
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33 * Each Pdf resource (fonts, images, ...) interacts with a PDF itself. |
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34 * It creates appropriate PDF objects, structures and sometime embedded files. |
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35 * Resources are referenced in content streams by names, which are stored in |
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36 * a page resource dictionaries. |
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37 * |
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38 * Thus, resources must be attached to the PDF. |
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39 * |
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40 * Resource abstraction uses own PDF object factory to store all necessary information. |
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41 * At the render time internal object factory is appended to the global PDF file |
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42 * factory. |
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43 * |
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44 * Resource abstraction also cashes information about rendered PDF files and |
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45 * doesn't duplicate resource description each time then Resource is rendered |
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46 * (referenced). |
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47 * |
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48 * @var Zend_Pdf_ElementFactory_Interface |
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49 */ |
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50 protected $_objectFactory; |
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51 |
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52 /** |
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53 * Main resource object |
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54 * |
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55 * @var Zend_Pdf_Element_Object |
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56 */ |
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57 protected $_resource; |
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58 |
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59 /** |
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60 * Object constructor. |
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61 * |
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62 * If resource is not a Zend_Pdf_Element object, then stream object with specified value is |
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63 * generated. |
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64 * |
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65 * @param Zend_Pdf_Element|string $resource |
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66 */ |
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67 public function __construct($resource) |
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68 { |
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69 if ($resource instanceof Zend_Pdf_Element_Object) { |
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70 $this->_objectFactory = $resource->getFactory(); |
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71 $this->_resource = $resource; |
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72 |
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73 return; |
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74 } |
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75 |
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76 require_once 'Zend/Pdf/ElementFactory.php'; |
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77 |
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78 $this->_objectFactory = Zend_Pdf_ElementFactory::createFactory(1); |
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79 if ($resource instanceof Zend_Pdf_Element) { |
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80 $this->_resource = $this->_objectFactory->newObject($resource); |
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81 } else { |
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82 $this->_resource = $this->_objectFactory->newStreamObject($resource); |
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83 } |
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84 } |
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85 |
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86 /** |
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87 * Clone page, extract it and dependent objects from the current document, |
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88 * so it can be used within other docs. |
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89 */ |
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90 public function __clone() |
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91 { |
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92 /** @todo implementation*/ |
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93 |
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94 // $factory = Zend_Pdf_ElementFactory::createFactory(1); |
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95 // $processed = array(); |
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96 // |
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97 // // Clone dictionary object. |
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98 // // Do it explicitly to prevent sharing resource attributes between different |
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99 // // results of clone operation (other resources are still shared) |
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100 // $dictionary = new Zend_Pdf_Element_Dictionary(); |
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101 // foreach ($this->_pageDictionary->getKeys() as $key) { |
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102 // $dictionary->$key = $this->_pageDictionary->$key->makeClone($factory->getFactory(), |
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103 // $processed, |
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104 // Zend_Pdf_Element::CLONE_MODE_SKIP_PAGES); |
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105 // } |
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106 // |
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107 // $this->_pageDictionary = $factory->newObject($dictionary); |
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108 // $this->_objectFactory = $factory; |
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109 // $this->_attached = false; |
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110 // $this->_style = null; |
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111 // $this->_font = null; |
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112 } |
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113 |
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114 /** |
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115 * Clone resource, extract it and dependent objects from the current document, |
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116 * so it can be used within other docs. |
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117 * |
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118 * @internal |
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119 * @param Zend_Pdf_ElementFactory_Interface $factory |
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120 * @param array $processed |
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121 * @return Zend_Pdf_Page |
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122 */ |
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123 public function cloneResource($factory, &$processed) |
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124 { |
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125 /** @todo implementation*/ |
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126 |
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127 // // Clone dictionary object. |
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128 // // Do it explicitly to prevent sharing page attributes between different |
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129 // // results of clonePage() operation (other resources are still shared) |
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130 // $dictionary = new Zend_Pdf_Element_Dictionary(); |
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131 // foreach ($this->_pageDictionary->getKeys() as $key) { |
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132 // $dictionary->$key = $this->_pageDictionary->$key->makeClone($factory->getFactory(), |
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133 // $processed, |
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134 // Zend_Pdf_Element::CLONE_MODE_SKIP_PAGES); |
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135 // } |
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136 // |
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137 // $clonedPage = new Zend_Pdf_Page($factory->newObject($dictionary), $factory); |
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138 // $clonedPage->_attached = false; |
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139 // |
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140 // return $clonedPage; |
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141 } |
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142 |
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143 /** |
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144 * Get resource. |
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145 * Used to reference resource in an internal PDF data structures (resource dictionaries) |
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146 * |
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147 * @internal |
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148 * @return Zend_Pdf_Element_Object |
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149 */ |
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150 public function getResource() |
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151 { |
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152 return $this->_resource; |
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153 } |
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154 |
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155 /** |
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156 * Get factory. |
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157 * |
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158 * @internal |
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159 * @return Zend_Pdf_ElementFactory_Interface |
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160 */ |
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161 public function getFactory() |
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162 { |
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163 return $this->_objectFactory; |
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164 } |
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165 } |