root / drupal7 / sites / all / libraries / fpdi-version / fpdi_pdf_parser.php @ c22e192e
1 | 85ad3d82 | Assos Assos | <?php
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2 | //
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3 | // FPDI - Version 1.4.4
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4 | //
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5 | // Copyright 2004-2013 Setasign - Jan Slabon
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6 | //
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7 | // Licensed under the Apache License, Version 2.0 (the "License");
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8 | // you may not use this file except in compliance with the License.
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9 | // You may obtain a copy of the License at
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10 | //
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11 | // http://www.apache.org/licenses/LICENSE-2.0
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12 | //
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13 | // Unless required by applicable law or agreed to in writing, software
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14 | // distributed under the License is distributed on an "AS IS" BASIS,
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15 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 | // See the License for the specific language governing permissions and
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17 | // limitations under the License.
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18 | //
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19 | |||
20 | require_once('pdf_parser.php'); |
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21 | |||
22 | class fpdi_pdf_parser extends pdf_parser { |
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23 | |||
24 | /**
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25 | * Pages
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26 | * Index beginns at 0
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27 | *
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28 | * @var array
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29 | */
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30 | var $pages; |
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31 | |||
32 | /**
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33 | * Page count
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34 | * @var integer
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35 | */
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36 | var $page_count; |
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37 | |||
38 | /**
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39 | * actual page number
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40 | * @var integer
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41 | */
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42 | var $pageno; |
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43 | |||
44 | /**
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45 | * PDF Version of imported Document
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46 | * @var string
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47 | */
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48 | var $pdfVersion; |
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49 | |||
50 | /**
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51 | * FPDI Reference
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52 | * @var object
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53 | */
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54 | var $fpdi; |
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55 | |||
56 | /**
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57 | * Available BoxTypes
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58 | *
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59 | * @var array
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60 | */
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61 | var $availableBoxes = array('/MediaBox', '/CropBox', '/BleedBox', '/TrimBox', '/ArtBox'); |
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62 | |||
63 | /**
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64 | * Constructor
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65 | *
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66 | * @param string $filename Source-Filename
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67 | * @param object $fpdi Object of type fpdi
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68 | */
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69 | function fpdi_pdf_parser($filename, &$fpdi) { |
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70 | $this->fpdi =& $fpdi; |
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71 | |||
72 | parent::pdf_parser($filename); |
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73 | |||
74 | // resolve Pages-Dictonary
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75 | $pages = $this->pdf_resolve_object($this->c, $this->root[1][1]['/Pages']); |
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76 | |||
77 | // Read pages
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78 | $this->read_pages($this->c, $pages, $this->pages); |
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79 | |||
80 | // count pages;
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81 | $this->page_count = count($this->pages); |
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82 | } |
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83 | |||
84 | /**
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85 | * Removes reference to fpdi object and closes the file handle
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86 | */
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87 | function cleanUp() { |
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88 | $this->fpdi = null; |
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89 | $this->closeFile();
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90 | } |
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91 | |||
92 | /**
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93 | * Overwrite parent::error()
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94 | *
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95 | * @param string $msg Error-Message
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96 | */
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97 | function error($msg) { |
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98 | $this->fpdi->error($msg); |
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99 | } |
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100 | |||
101 | /**
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102 | * Get pagecount from sourcefile
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103 | *
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104 | * @return int
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105 | */
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106 | function getPageCount() { |
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107 | return $this->page_count; |
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108 | } |
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109 | |||
110 | |||
111 | /**
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112 | * Set pageno
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113 | *
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114 | * @param int $pageno Pagenumber to use
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115 | */
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116 | function setPageno($pageno) { |
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117 | $pageno = ((int) $pageno) - 1; |
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118 | |||
119 | if ($pageno < 0 || $pageno >= $this->getPageCount()) { |
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120 | $this->fpdi->error('Pagenumber is wrong!'); |
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121 | } |
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122 | |||
123 | $this->pageno = $pageno; |
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124 | } |
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125 | |||
126 | /**
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127 | * Get page-resources from current page
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128 | *
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129 | * @return array
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130 | */
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131 | function getPageResources() { |
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132 | return $this->_getPageResources($this->pages[$this->pageno]); |
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133 | } |
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134 | |||
135 | /**
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136 | * Get page-resources from /Page
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137 | *
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138 | * @param array $obj Array of pdf-data
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139 | */
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140 | function _getPageResources ($obj) { // $obj = /Page |
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141 | $obj = $this->pdf_resolve_object($this->c, $obj); |
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142 | |||
143 | // If the current object has a resources
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144 | // dictionary associated with it, we use
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145 | // it. Otherwise, we move back to its
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146 | // parent object.
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147 | if (isset ($obj[1][1]['/Resources'])) { |
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148 | $res = $this->pdf_resolve_object($this->c, $obj[1][1]['/Resources']); |
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149 | if ($res[0] == PDF_TYPE_OBJECT) |
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150 | return $res[1]; |
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151 | return $res; |
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152 | } else {
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153 | if (!isset ($obj[1][1]['/Parent'])) { |
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154 | return false; |
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155 | } else {
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156 | $res = $this->_getPageResources($obj[1][1]['/Parent']); |
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157 | if ($res[0] == PDF_TYPE_OBJECT) |
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158 | return $res[1]; |
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159 | return $res; |
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160 | } |
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161 | } |
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162 | } |
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163 | |||
164 | |||
165 | /**
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166 | * Get content of current page
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167 | *
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168 | * If more /Contents is an array, the streams are concated
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169 | *
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170 | * @return string
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171 | */
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172 | function getContent() { |
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173 | $buffer = ''; |
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174 | |||
175 | if (isset($this->pages[$this->pageno][1][1]['/Contents'])) { |
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176 | $contents = $this->_getPageContent($this->pages[$this->pageno][1][1]['/Contents']); |
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177 | foreach($contents AS $tmp_content) { |
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178 | $buffer .= $this->_rebuildContentStream($tmp_content) . ' '; |
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179 | } |
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180 | } |
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181 | |||
182 | return $buffer; |
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183 | } |
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184 | |||
185 | |||
186 | /**
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187 | * Resolve all content-objects
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188 | *
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189 | * @param array $content_ref
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190 | * @return array
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191 | */
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192 | function _getPageContent($content_ref) { |
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193 | $contents = array(); |
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194 | |||
195 | if ($content_ref[0] == PDF_TYPE_OBJREF) { |
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196 | $content = $this->pdf_resolve_object($this->c, $content_ref); |
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197 | if ($content[1][0] == PDF_TYPE_ARRAY) { |
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198 | $contents = $this->_getPageContent($content[1]); |
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199 | } else {
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200 | $contents[] = $content; |
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201 | } |
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202 | } elseif ($content_ref[0] == PDF_TYPE_ARRAY) { |
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203 | foreach ($content_ref[1] AS $tmp_content_ref) { |
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204 | $contents = array_merge($contents,$this->_getPageContent($tmp_content_ref)); |
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205 | } |
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206 | } |
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207 | |||
208 | return $contents; |
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209 | } |
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210 | |||
211 | |||
212 | /**
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213 | * Rebuild content-streams
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214 | *
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215 | * @param array $obj
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216 | * @return string
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217 | */
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218 | function _rebuildContentStream($obj) { |
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219 | $filters = array(); |
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220 | |||
221 | if (isset($obj[1][1]['/Filter'])) { |
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222 | $_filter = $obj[1][1]['/Filter']; |
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223 | |||
224 | if ($_filter[0] == PDF_TYPE_OBJREF) { |
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225 | $tmpFilter = $this->pdf_resolve_object($this->c, $_filter); |
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226 | $_filter = $tmpFilter[1]; |
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227 | } |
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228 | |||
229 | if ($_filter[0] == PDF_TYPE_TOKEN) { |
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230 | $filters[] = $_filter; |
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231 | } elseif ($_filter[0] == PDF_TYPE_ARRAY) { |
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232 | $filters = $_filter[1]; |
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233 | } |
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234 | } |
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235 | |||
236 | $stream = $obj[2][1]; |
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237 | |||
238 | foreach ($filters AS $_filter) { |
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239 | switch ($_filter[1]) { |
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240 | case '/FlateDecode': |
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241 | case '/Fl': |
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242 | // $stream .= "\x0F\x0D"; // in an errorious stream this suffix could work
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243 | // $stream .= "\x0A";
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244 | // $stream .= "\x0D";
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245 | if (function_exists('gzuncompress')) { |
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246 | $oStream = $stream; |
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247 | $stream = (strlen($stream) > 0) ? @gzuncompress($stream) : ''; |
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248 | } else {
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249 | $this->error(sprintf('To handle %s filter, please compile php with zlib support.',$_filter[1])); |
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250 | } |
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251 | |||
252 | if ($stream === false) { |
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253 | $oStream = substr($oStream, 2); |
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254 | $stream = @gzinflate($oStream); |
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255 | if ($stream == false) { |
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256 | $this->error('Error while decompressing stream.'); |
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257 | } |
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258 | } |
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259 | break;
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260 | case '/LZWDecode': |
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261 | include_once('filters/FilterLZW_FPDI.php'); |
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262 | $decoder = new FilterLZW_FPDI($this->fpdi); |
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263 | $stream = $decoder->decode($stream); |
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264 | break;
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265 | case '/ASCII85Decode': |
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266 | include_once('filters/FilterASCII85_FPDI.php'); |
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267 | $decoder = new FilterASCII85_FPDI($this->fpdi); |
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268 | $stream = $decoder->decode($stream); |
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269 | break;
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270 | case null: |
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271 | $stream = $stream; |
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272 | break;
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273 | default:
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274 | $this->error(sprintf('Unsupported Filter: %s',$_filter[1])); |
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275 | } |
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276 | } |
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277 | |||
278 | return $stream; |
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279 | } |
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280 | |||
281 | |||
282 | /**
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283 | * Get a Box from a page
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284 | * Arrayformat is same as used by fpdf_tpl
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285 | *
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286 | * @param array $page a /Page
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287 | * @param string $box_index Type of Box @see $availableBoxes
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288 | * @param float Scale factor from user space units to points
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289 | * @return array
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290 | */
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291 | function getPageBox($page, $box_index, $k) { |
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292 | $page = $this->pdf_resolve_object($this->c, $page); |
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293 | $box = null; |
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294 | if (isset($page[1][1][$box_index])) |
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295 | $box =& $page[1][1][$box_index]; |
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296 | |||
297 | if (!is_null($box) && $box[0] == PDF_TYPE_OBJREF) { |
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298 | $tmp_box = $this->pdf_resolve_object($this->c, $box); |
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299 | $box = $tmp_box[1]; |
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300 | } |
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301 | |||
302 | if (!is_null($box) && $box[0] == PDF_TYPE_ARRAY) { |
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303 | $b =& $box[1]; |
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304 | return array('x' => $b[0][1] / $k, |
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305 | 'y' => $b[1][1] / $k, |
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306 | 'w' => abs($b[0][1] - $b[2][1]) / $k, |
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307 | 'h' => abs($b[1][1] - $b[3][1]) / $k, |
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308 | 'llx' => min($b[0][1], $b[2][1]) / $k, |
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309 | 'lly' => min($b[1][1], $b[3][1]) / $k, |
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310 | 'urx' => max($b[0][1], $b[2][1]) / $k, |
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311 | 'ury' => max($b[1][1], $b[3][1]) / $k, |
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312 | ); |
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313 | } elseif (!isset ($page[1][1]['/Parent'])) { |
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314 | return false; |
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315 | } else {
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316 | return $this->getPageBox($this->pdf_resolve_object($this->c, $page[1][1]['/Parent']), $box_index, $k); |
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317 | } |
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318 | } |
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319 | |||
320 | /**
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321 | * Get all page boxes by page no
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322 | *
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323 | * @param int The page number
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324 | * @param float Scale factor from user space units to points
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325 | * @return array
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326 | */
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327 | function getPageBoxes($pageno, $k) { |
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328 | return $this->_getPageBoxes($this->pages[$pageno - 1], $k); |
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329 | } |
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330 | |||
331 | /**
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332 | * Get all boxes from /Page
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333 | *
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334 | * @param array a /Page
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335 | * @return array
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336 | */
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337 | function _getPageBoxes($page, $k) { |
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338 | $boxes = array(); |
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339 | |||
340 | foreach($this->availableBoxes AS $box) { |
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341 | if ($_box = $this->getPageBox($page, $box, $k)) { |
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342 | $boxes[$box] = $_box; |
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343 | } |
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344 | } |
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345 | |||
346 | return $boxes; |
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347 | } |
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348 | |||
349 | /**
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350 | * Get the page rotation by pageno
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351 | *
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352 | * @param integer $pageno
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353 | * @return array
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354 | */
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355 | function getPageRotation($pageno) { |
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356 | return $this->_getPageRotation($this->pages[$pageno - 1]); |
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357 | } |
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358 | |||
359 | function _getPageRotation($obj) { // $obj = /Page |
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360 | $obj = $this->pdf_resolve_object($this->c, $obj); |
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361 | if (isset ($obj[1][1]['/Rotate'])) { |
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362 | $res = $this->pdf_resolve_object($this->c, $obj[1][1]['/Rotate']); |
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363 | if ($res[0] == PDF_TYPE_OBJECT) |
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364 | return $res[1]; |
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365 | return $res; |
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366 | } else {
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367 | if (!isset ($obj[1][1]['/Parent'])) { |
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368 | return false; |
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369 | } else {
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370 | $res = $this->_getPageRotation($obj[1][1]['/Parent']); |
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371 | if ($res[0] == PDF_TYPE_OBJECT) |
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372 | return $res[1]; |
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373 | return $res; |
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374 | } |
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375 | } |
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376 | } |
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377 | |||
378 | /**
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379 | * Read all /Page(es)
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380 | *
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381 | * @param object pdf_context
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382 | * @param array /Pages
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383 | * @param array the result-array
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384 | */
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385 | function read_pages(&$c, &$pages, &$result) { |
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386 | // Get the kids dictionary
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387 | $_kids = $this->pdf_resolve_object ($c, $pages[1][1]['/Kids']); |
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388 | |||
389 | if (!is_array($_kids)) |
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390 | $this->error('Cannot find /Kids in current /Page-Dictionary'); |
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391 | |||
392 | if ($_kids[1][0] == PDF_TYPE_ARRAY) { |
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393 | $kids = $_kids[1][1]; |
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394 | } else {
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395 | $kids = $_kids[1]; |
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396 | } |
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397 | |||
398 | foreach ($kids as $v) { |
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399 | $pg = $this->pdf_resolve_object ($c, $v); |
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400 | if ($pg[1][1]['/Type'][1] === '/Pages') { |
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401 | // If one of the kids is an embedded
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402 | // /Pages array, resolve it as well.
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403 | $this->read_pages($c, $pg, $result); |
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404 | } else {
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405 | $result[] = $pg; |
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406 | } |
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407 | } |
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408 | } |
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409 | |||
410 | |||
411 | |||
412 | /**
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413 | * Get PDF-Version
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414 | *
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415 | * And reset the PDF Version used in FPDI if needed
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416 | */
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417 | function getPDFVersion() { |
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418 | parent::getPDFVersion();
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419 | $this->fpdi->setPDFVersion(max($this->fpdi->getPDFVersion(), $this->pdfVersion)); |
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420 | } |
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421 | } |