smalot /
pdfparser
| Total Complexity | 180 |
| Total Lines | 790 |
| Duplicated Lines | 0 % |
| Changes | 5 | ||
| Bugs | 2 | Features | 1 |
Complex classes like RawDataParser often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use RawDataParser, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 45 | class RawDataParser |
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| 46 | { |
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| 47 | /** |
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| 48 | * Configuration array. |
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| 49 | */ |
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| 50 | protected $cfg = [ |
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| 51 | // if `true` ignore filter decoding errors |
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| 52 | 'ignore_filter_decoding_errors' => true, |
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| 53 | // if `true` ignore missing filter decoding errors |
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| 54 | 'ignore_missing_filter_decoders' => true, |
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| 55 | ]; |
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| 56 | |||
| 57 | protected $filterHelper; |
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| 58 | |||
| 59 | protected $xrefCache; |
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| 60 | |||
| 61 | /** |
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| 62 | * @param array $cfg Configuration array, default is [] |
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| 63 | */ |
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| 64 | public function __construct($cfg = []) |
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| 65 | { |
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| 66 | // merge given array with default values |
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| 67 | $this->cfg = array_merge($this->cfg, $cfg); |
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| 68 | |||
| 69 | $this->filterHelper = new FilterHelper(); |
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| 70 | } |
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| 71 | |||
| 72 | /** |
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| 73 | * Decode the specified stream. |
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| 74 | * |
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| 75 | * @param string $pdfData PDF data |
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| 76 | * @param array $xref |
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| 77 | * @param array $sdic Stream's dictionary array |
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| 78 | * @param string $stream Stream to decode |
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| 79 | * |
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| 80 | * @return array containing decoded stream data and remaining filters |
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| 81 | */ |
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| 82 | protected function decodeStream($pdfData, $xref, $sdic, $stream) |
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| 83 | { |
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| 84 | // get stream length and filters |
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| 85 | $slength = \strlen($stream); |
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| 86 | if ($slength <= 0) { |
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| 87 | return ['', []]; |
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| 88 | } |
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| 89 | $filters = []; |
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| 90 | foreach ($sdic as $k => $v) { |
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| 91 | if ('/' == $v[0]) { |
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| 92 | if (('Length' == $v[1]) and (isset($sdic[($k + 1)])) and ('numeric' == $sdic[($k + 1)][0])) { |
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| 93 | // get declared stream length |
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| 94 | $declength = (int) ($sdic[($k + 1)][1]); |
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| 95 | if ($declength < $slength) { |
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| 96 | $stream = substr($stream, 0, $declength); |
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| 97 | $slength = $declength; |
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| 98 | } |
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| 99 | } elseif (('Filter' == $v[1]) and (isset($sdic[($k + 1)]))) { |
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| 100 | // resolve indirect object |
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| 101 | $objval = $this->getObjectVal($pdfData, $xref, $sdic[($k + 1)]); |
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| 102 | if ('/' == $objval[0]) { |
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| 103 | // single filter |
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| 104 | $filters[] = $objval[1]; |
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| 105 | } elseif ('[' == $objval[0]) { |
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| 106 | // array of filters |
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| 107 | foreach ($objval[1] as $flt) { |
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| 108 | if ('/' == $flt[0]) { |
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| 109 | $filters[] = $flt[1]; |
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| 110 | } |
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| 111 | } |
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| 112 | } |
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| 113 | } |
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| 114 | } |
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| 115 | } |
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| 116 | |||
| 117 | // decode the stream |
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| 118 | $remaining_filters = []; |
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| 119 | foreach ($filters as $filter) { |
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| 120 | if (\in_array($filter, $this->filterHelper->getAvailableFilters())) { |
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| 121 | try { |
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| 122 | $stream = $this->filterHelper->decodeFilter($filter, $stream); |
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| 123 | } catch (Exception $e) { |
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| 124 | $emsg = $e->getMessage(); |
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| 125 | if ((('~' == $emsg[0]) && !$this->cfg['ignore_missing_filter_decoders']) |
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| 126 | || (('~' != $emsg[0]) && !$this->cfg['ignore_filter_decoding_errors']) |
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| 127 | ) { |
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| 128 | throw new Exception($e->getMessage()); |
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| 129 | } |
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| 130 | } |
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| 131 | } else { |
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| 132 | // add missing filter to array |
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| 133 | $remaining_filters[] = $filter; |
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| 134 | } |
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| 135 | } |
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| 136 | |||
| 137 | return [$stream, $remaining_filters]; |
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| 138 | } |
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| 139 | |||
| 140 | /** |
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| 141 | * Decode the Cross-Reference section |
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| 142 | * |
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| 143 | * @param string $pdfData PDF data |
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| 144 | * @param int $startxref Offset at which the xref section starts (position of the 'xref' keyword) |
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| 145 | * @param array $xref Previous xref array (if any) |
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| 146 | * |
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| 147 | * @return array containing xref and trailer data |
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| 148 | */ |
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| 149 | protected function decodeXref($pdfData, $startxref, $xref = []) |
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| 150 | { |
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| 151 | $startxref += 4; // 4 is the length of the word 'xref' |
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| 152 | // skip initial white space chars: \x00 null (NUL), \x09 horizontal tab (HT), \x0A line feed (LF), \x0C form feed (FF), \x0D carriage return (CR), \x20 space (SP) |
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| 153 | $offset = $startxref + strspn($pdfData, "\x00\x09\x0a\x0c\x0d\x20", $startxref); |
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| 154 | // initialize object number |
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| 155 | $obj_num = 0; |
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| 156 | // search for cross-reference entries or subsection |
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| 157 | while (preg_match('/([0-9]+)[\x20]([0-9]+)[\x20]?([nf]?)(\r\n|[\x20]?[\r\n])/', $pdfData, $matches, PREG_OFFSET_CAPTURE, $offset) > 0) { |
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| 158 | if ($matches[0][1] != $offset) { |
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| 159 | // we are on another section |
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| 160 | break; |
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| 161 | } |
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| 162 | $offset += \strlen($matches[0][0]); |
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| 163 | if ('n' == $matches[3][0]) { |
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| 164 | // create unique object index: [object number]_[generation number] |
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| 165 | $index = $obj_num.'_'.(int) ($matches[2][0]); |
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| 166 | // check if object already exist |
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| 167 | if (!isset($xref['xref'][$index])) { |
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| 168 | // store object offset position |
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| 169 | $xref['xref'][$index] = (int) ($matches[1][0]); |
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| 170 | } |
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| 171 | ++$obj_num; |
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| 172 | } elseif ('f' == $matches[3][0]) { |
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| 173 | ++$obj_num; |
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| 174 | } else { |
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| 175 | // object number (index) |
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| 176 | $obj_num = (int) ($matches[1][0]); |
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| 177 | } |
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| 178 | } |
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| 179 | // get trailer data |
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| 180 | if (preg_match('/trailer[\s]*<<(.*)>>/isU', $pdfData, $matches, PREG_OFFSET_CAPTURE, $offset) > 0) { |
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| 181 | $trailer_data = $matches[1][0]; |
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| 182 | if (!isset($xref['trailer']) or empty($xref['trailer'])) { |
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| 183 | // get only the last updated version |
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| 184 | $xref['trailer'] = []; |
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| 185 | // parse trailer_data |
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| 186 | if (preg_match('/Size[\s]+([0-9]+)/i', $trailer_data, $matches) > 0) { |
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| 187 | $xref['trailer']['size'] = (int) ($matches[1]); |
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| 188 | } |
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| 189 | if (preg_match('/Root[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) { |
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| 190 | $xref['trailer']['root'] = (int) ($matches[1]).'_'.(int) ($matches[2]); |
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| 191 | } |
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| 192 | if (preg_match('/Encrypt[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) { |
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| 193 | $xref['trailer']['encrypt'] = (int) ($matches[1]).'_'.(int) ($matches[2]); |
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| 194 | } |
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| 195 | if (preg_match('/Info[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailer_data, $matches) > 0) { |
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| 196 | $xref['trailer']['info'] = (int) ($matches[1]).'_'.(int) ($matches[2]); |
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| 197 | } |
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| 198 | if (preg_match('/ID[\s]*[\[][\s]*[<]([^>]*)[>][\s]*[<]([^>]*)[>]/i', $trailer_data, $matches) > 0) { |
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| 199 | $xref['trailer']['id'] = []; |
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| 200 | $xref['trailer']['id'][0] = $matches[1]; |
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| 201 | $xref['trailer']['id'][1] = $matches[2]; |
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| 202 | } |
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| 203 | } |
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| 204 | if (preg_match('/Prev[\s]+([0-9]+)/i', $trailer_data, $matches) > 0) { |
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| 205 | // get previous xref |
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| 206 | $xref = $this->getXrefData($pdfData, (int) ($matches[1]), $xref); |
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| 207 | } |
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| 208 | } else { |
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| 209 | throw new Exception('Unable to find trailer'); |
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| 210 | } |
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| 211 | |||
| 212 | return $xref; |
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| 213 | } |
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| 214 | |||
| 215 | /** |
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| 216 | * Decode the Cross-Reference Stream section |
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| 217 | * |
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| 218 | * @param string $pdfData PDF data |
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| 219 | * @param int $startxref Offset at which the xref section starts |
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| 220 | * @param array $xref Previous xref array (if any) |
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| 221 | * |
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| 222 | * @return array containing xref and trailer data |
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| 223 | * |
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| 224 | * @throws Exception if unknown PNG predictor detected |
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| 225 | */ |
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| 226 | protected function decodeXrefStream($pdfData, $startxref, $xref = []) |
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| 227 | { |
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| 228 | // try to read Cross-Reference Stream |
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| 229 | $xrefobj = $this->getRawObject($pdfData, $startxref); |
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| 230 | $xrefcrs = $this->getIndirectObject($pdfData, $xref, $xrefobj[1], $startxref, true); |
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| 231 | if (!isset($xref['trailer']) or empty($xref['trailer'])) { |
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| 232 | // get only the last updated version |
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| 233 | $xref['trailer'] = []; |
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| 234 | $filltrailer = true; |
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| 235 | } else { |
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| 236 | $filltrailer = false; |
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| 237 | } |
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| 238 | if (!isset($xref['xref'])) { |
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| 239 | $xref['xref'] = []; |
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| 240 | } |
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| 241 | $valid_crs = false; |
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| 242 | $columns = 0; |
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| 243 | $sarr = $xrefcrs[0][1]; |
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| 244 | if (!\is_array($sarr)) { |
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| 245 | $sarr = []; |
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| 246 | } |
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| 247 | |||
| 248 | $wb = []; |
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| 249 | |||
| 250 | foreach ($sarr as $k => $v) { |
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| 251 | if ( |
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| 252 | ('/' == $v[0]) |
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| 253 | && ('Type' == $v[1]) |
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| 254 | && ( |
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| 255 | isset($sarr[($k + 1)]) |
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| 256 | && '/' == $sarr[($k + 1)][0] |
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| 257 | && 'XRef' == $sarr[($k + 1)][1] |
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| 258 | ) |
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| 259 | ) { |
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| 260 | $valid_crs = true; |
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| 261 | } elseif (('/' == $v[0]) and ('Index' == $v[1]) and (isset($sarr[($k + 1)]))) { |
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| 262 | // first object number in the subsection |
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| 263 | $index_first = (int) ($sarr[($k + 1)][1][0][1]); |
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| 264 | } elseif (('/' == $v[0]) and ('Prev' == $v[1]) and (isset($sarr[($k + 1)]) and ('numeric' == $sarr[($k + 1)][0]))) { |
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| 265 | // get previous xref offset |
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| 266 | $prevxref = (int) ($sarr[($k + 1)][1]); |
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| 267 | } elseif (('/' == $v[0]) and ('W' == $v[1]) and (isset($sarr[($k + 1)]))) { |
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| 268 | // number of bytes (in the decoded stream) of the corresponding field |
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| 269 | $wb[0] = (int) ($sarr[($k + 1)][1][0][1]); |
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| 270 | $wb[1] = (int) ($sarr[($k + 1)][1][1][1]); |
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| 271 | $wb[2] = (int) ($sarr[($k + 1)][1][2][1]); |
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| 272 | } elseif (('/' == $v[0]) and ('DecodeParms' == $v[1]) and (isset($sarr[($k + 1)][1]))) { |
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| 273 | $decpar = $sarr[($k + 1)][1]; |
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| 274 | foreach ($decpar as $kdc => $vdc) { |
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| 275 | if ( |
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| 276 | '/' == $vdc[0] |
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| 277 | && 'Columns' == $vdc[1] |
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| 278 | && ( |
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| 279 | isset($decpar[($kdc + 1)]) |
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| 280 | && 'numeric' == $decpar[($kdc + 1)][0] |
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| 281 | ) |
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| 282 | ) { |
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| 283 | $columns = (int) ($decpar[($kdc + 1)][1]); |
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| 284 | } elseif ( |
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| 285 | '/' == $vdc[0] |
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| 286 | && 'Predictor' == $vdc[1] |
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| 287 | && ( |
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| 288 | isset($decpar[($kdc + 1)]) |
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| 289 | && 'numeric' == $decpar[($kdc + 1)][0] |
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| 290 | ) |
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| 291 | ) { |
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| 292 | $predictor = (int) ($decpar[($kdc + 1)][1]); |
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|
Unused Code
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| 293 | } |
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| 294 | } |
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| 295 | } elseif ($filltrailer) { |
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| 296 | if (('/' == $v[0]) and ('Size' == $v[1]) and (isset($sarr[($k + 1)]) and ('numeric' == $sarr[($k + 1)][0]))) { |
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| 297 | $xref['trailer']['size'] = $sarr[($k + 1)][1]; |
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| 298 | } elseif (('/' == $v[0]) and ('Root' == $v[1]) and (isset($sarr[($k + 1)]) and ('objref' == $sarr[($k + 1)][0]))) { |
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| 299 | $xref['trailer']['root'] = $sarr[($k + 1)][1]; |
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| 300 | } elseif (('/' == $v[0]) and ('Info' == $v[1]) and (isset($sarr[($k + 1)]) and ('objref' == $sarr[($k + 1)][0]))) { |
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| 301 | $xref['trailer']['info'] = $sarr[($k + 1)][1]; |
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| 302 | } elseif (('/' == $v[0]) and ('Encrypt' == $v[1]) and (isset($sarr[($k + 1)]) and ('objref' == $sarr[($k + 1)][0]))) { |
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| 303 | $xref['trailer']['encrypt'] = $sarr[($k + 1)][1]; |
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| 304 | } elseif (('/' == $v[0]) and ('ID' == $v[1]) and (isset($sarr[($k + 1)]))) { |
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| 305 | $xref['trailer']['id'] = []; |
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| 306 | $xref['trailer']['id'][0] = $sarr[($k + 1)][1][0][1]; |
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| 307 | $xref['trailer']['id'][1] = $sarr[($k + 1)][1][1][1]; |
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| 308 | } |
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| 309 | } |
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| 310 | } |
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| 311 | |||
| 312 | // decode data |
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| 313 | if ($valid_crs and isset($xrefcrs[1][3][0])) { |
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| 314 | // number of bytes in a row |
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| 315 | $rowlen = ($columns + 1); |
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| 316 | // convert the stream into an array of integers |
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| 317 | $sdata = unpack('C*', $xrefcrs[1][3][0]); |
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| 318 | // split the rows |
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| 319 | $sdata = array_chunk($sdata, $rowlen); |
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| 320 | // initialize decoded array |
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| 321 | $ddata = []; |
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| 322 | // initialize first row with zeros |
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| 323 | $prev_row = array_fill(0, $rowlen, 0); |
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| 324 | // for each row apply PNG unpredictor |
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| 325 | foreach ($sdata as $k => $row) { |
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| 326 | // initialize new row |
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| 327 | $ddata[$k] = []; |
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| 328 | // get PNG predictor value |
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| 329 | $predictor = (10 + $row[0]); |
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| 330 | // for each byte on the row |
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| 331 | for ($i = 1; $i <= $columns; ++$i) { |
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| 332 | // new index |
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| 333 | $j = ($i - 1); |
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| 334 | $row_up = $prev_row[$j]; |
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| 335 | if (1 == $i) { |
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| 336 | $row_left = 0; |
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| 337 | $row_upleft = 0; |
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| 338 | } else { |
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| 339 | $row_left = $row[($i - 1)]; |
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| 340 | $row_upleft = $prev_row[($j - 1)]; |
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| 341 | } |
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| 342 | switch ($predictor) { |
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| 343 | case 10: // PNG prediction (on encoding, PNG None on all rows) |
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| 344 | $ddata[$k][$j] = $row[$i]; |
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| 345 | break; |
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| 346 | |||
| 347 | case 11: // PNG prediction (on encoding, PNG Sub on all rows) |
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| 348 | $ddata[$k][$j] = (($row[$i] + $row_left) & 0xff); |
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| 349 | break; |
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| 350 | |||
| 351 | case 12: // PNG prediction (on encoding, PNG Up on all rows) |
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| 352 | $ddata[$k][$j] = (($row[$i] + $row_up) & 0xff); |
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| 353 | break; |
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| 354 | |||
| 355 | case 13: // PNG prediction (on encoding, PNG Average on all rows) |
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| 356 | $ddata[$k][$j] = (($row[$i] + (($row_left + $row_up) / 2)) & 0xff); |
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| 357 | break; |
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| 358 | |||
| 359 | case 14: // PNG prediction (on encoding, PNG Paeth on all rows) |
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| 360 | // initial estimate |
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| 361 | $p = ($row_left + $row_up - $row_upleft); |
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| 362 | // distances |
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| 363 | $pa = abs($p - $row_left); |
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| 364 | $pb = abs($p - $row_up); |
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| 365 | $pc = abs($p - $row_upleft); |
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| 366 | $pmin = min($pa, $pb, $pc); |
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| 367 | // return minimum distance |
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| 368 | switch ($pmin) { |
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| 369 | case $pa: |
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| 370 | $ddata[$k][$j] = (($row[$i] + $row_left) & 0xff); |
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| 371 | break; |
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| 372 | |||
| 373 | case $pb: |
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| 374 | $ddata[$k][$j] = (($row[$i] + $row_up) & 0xff); |
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| 375 | break; |
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| 376 | |||
| 377 | case $pc: |
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| 378 | $ddata[$k][$j] = (($row[$i] + $row_upleft) & 0xff); |
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| 379 | break; |
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| 380 | } |
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| 381 | break; |
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| 382 | |||
| 383 | default: // PNG prediction (on encoding, PNG optimum) |
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| 384 | throw new Exception('Unknown PNG predictor'); |
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| 385 | } |
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| 386 | } |
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| 387 | $prev_row = $ddata[$k]; |
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| 388 | } // end for each row |
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| 389 | // complete decoding |
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| 390 | $sdata = []; |
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| 391 | // for every row |
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| 392 | foreach ($ddata as $k => $row) { |
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| 393 | // initialize new row |
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| 394 | $sdata[$k] = [0, 0, 0]; |
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| 395 | if (0 == $wb[0]) { |
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| 396 | // default type field |
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| 397 | $sdata[$k][0] = 1; |
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| 398 | } |
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| 399 | $i = 0; // count bytes in the row |
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| 400 | // for every column |
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| 401 | for ($c = 0; $c < 3; ++$c) { |
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| 402 | // for every byte on the column |
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| 403 | for ($b = 0; $b < $wb[$c]; ++$b) { |
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| 404 | if (isset($row[$i])) { |
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| 405 | $sdata[$k][$c] += ($row[$i] << (($wb[$c] - 1 - $b) * 8)); |
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| 406 | } |
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| 407 | ++$i; |
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| 408 | } |
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| 409 | } |
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| 410 | } |
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| 411 | $ddata = []; |
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| 412 | // fill xref |
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| 413 | if (isset($index_first)) { |
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| 414 | $obj_num = $index_first; |
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| 415 | } else { |
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| 416 | $obj_num = 0; |
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| 417 | } |
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| 418 | foreach ($sdata as $k => $row) { |
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| 419 | switch ($row[0]) { |
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| 420 | case 0: // (f) linked list of free objects |
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| 421 | break; |
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| 422 | |||
| 423 | case 1: // (n) objects that are in use but are not compressed |
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| 424 | // create unique object index: [object number]_[generation number] |
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| 425 | $index = $obj_num.'_'.$row[2]; |
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| 426 | // check if object already exist |
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| 427 | if (!isset($xref['xref'][$index])) { |
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| 428 | // store object offset position |
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| 429 | $xref['xref'][$index] = $row[1]; |
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| 430 | } |
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| 431 | break; |
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| 432 | |||
| 433 | case 2: // compressed objects |
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| 434 | // $row[1] = object number of the object stream in which this object is stored |
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| 435 | // $row[2] = index of this object within the object stream |
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| 436 | $index = $row[1].'_0_'.$row[2]; |
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| 437 | $xref['xref'][$index] = -1; |
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| 438 | break; |
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| 439 | |||
| 440 | default: // null objects |
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| 441 | break; |
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| 442 | } |
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| 443 | ++$obj_num; |
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| 444 | } |
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| 445 | } // end decoding data |
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| 446 | if (isset($prevxref)) { |
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| 447 | // get previous xref |
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| 448 | $xref = $this->getXrefData($pdfData, $prevxref, $xref); |
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| 449 | } |
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| 450 | |||
| 451 | return $xref; |
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| 452 | } |
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| 453 | |||
| 454 | /** |
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| 455 | * Get content of indirect object. |
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| 456 | * |
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| 457 | * @param string $pdfData PDF data |
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| 458 | * @param array $xref |
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| 459 | * @param string $obj_ref Object number and generation number separated by underscore character |
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| 460 | * @param int $offset Object offset |
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| 461 | * @param bool $decoding If true decode streams |
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| 462 | * |
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| 463 | * @return array containing object data |
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| 464 | * |
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| 465 | * @throws Exception if invalid object reference found |
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| 466 | */ |
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| 467 | protected function getIndirectObject($pdfData, $xref, $obj_ref, $offset = 0, $decoding = true) |
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| 468 | { |
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| 469 | $obj = explode('_', $obj_ref); |
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| 470 | if ((false === $obj) or (2 != \count($obj))) { |
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| 471 | throw new Exception('Invalid object reference for $obj.'); |
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| 472 | } |
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| 473 | $objref = $obj[0].' '.$obj[1].' obj'; |
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| 474 | // ignore leading zeros |
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| 475 | $offset += strspn($pdfData, '0', $offset); |
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| 476 | if (strpos($pdfData, $objref, $offset) != $offset) { |
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| 477 | // an indirect reference to an undefined object shall be considered a reference to the null object |
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| 478 | return ['null', 'null', $offset]; |
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| 479 | } |
||
| 480 | // starting position of object content |
||
| 481 | $offset += \strlen($objref); |
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| 482 | // get array of object content |
||
| 483 | $objdata = []; |
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| 484 | $i = 0; // object main index |
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| 485 | do { |
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| 486 | $oldoffset = $offset; |
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| 487 | // get element |
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| 488 | $element = $this->getRawObject($pdfData, $offset); |
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| 489 | $offset = $element[2]; |
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| 490 | // decode stream using stream's dictionary information |
||
| 491 | if ($decoding and ('stream' == $element[0]) and (isset($objdata[($i - 1)][0])) and ('<<' == $objdata[($i - 1)][0])) { |
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| 492 | $element[3] = $this->decodeStream($pdfData, $xref, $objdata[($i - 1)][1], $element[1]); |
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| 493 | } |
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| 494 | $objdata[$i] = $element; |
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| 495 | ++$i; |
||
| 496 | } while (('endobj' != $element[0]) and ($offset != $oldoffset)); |
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| 497 | |||
| 498 | // remove closing delimiter |
||
| 499 | array_pop($objdata); |
||
| 500 | |||
| 501 | // return raw object content |
||
| 502 | return $objdata; |
||
| 503 | } |
||
| 504 | |||
| 505 | /** |
||
| 506 | * Get the content of object, resolving indect object reference if necessary. |
||
| 507 | * |
||
| 508 | * @param string $pdfData PDF data |
||
| 509 | * @param string $obj Object value |
||
| 510 | * |
||
| 511 | * @return array containing object data |
||
| 512 | */ |
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| 513 | protected function getObjectVal($pdfData, $xref, $obj) |
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| 514 | { |
||
| 515 | if ('objref' == $obj[0]) { |
||
| 516 | // reference to indirect object |
||
| 517 | if (isset($this->objects[$obj[1]])) { |
||
| 518 | // this object has been already parsed |
||
| 519 | return $this->objects[$obj[1]]; |
||
| 520 | } elseif (isset($xref[$obj[1]])) { |
||
| 521 | // parse new object |
||
| 522 | $this->objects[$obj[1]] = $this->getIndirectObject($pdfData, $xref, $obj[1], $xref[$obj[1]], false); |
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| 523 | |||
| 524 | return $this->objects[$obj[1]]; |
||
| 525 | } |
||
| 526 | } |
||
| 527 | |||
| 528 | return $obj; |
||
| 529 | } |
||
| 530 | |||
| 531 | /** |
||
| 532 | * Get object type, raw value and offset to next object |
||
| 533 | * |
||
| 534 | * @param int $offset Object offset |
||
| 535 | * |
||
| 536 | * @return array containing object type, raw value and offset to next object |
||
| 537 | */ |
||
| 538 | protected function getRawObject($pdfData, $offset = 0) |
||
| 734 | } |
||
| 735 | |||
| 736 | /** |
||
| 737 | * Get Cross-Reference (xref) table and trailer data from PDF document data. |
||
| 738 | * |
||
| 739 | * @param string $pdfData |
||
| 740 | * @param int $offset xref offset (if know) |
||
| 741 | * @param array $xref previous xref array (if any) |
||
| 742 | * |
||
| 743 | * @return array containing xref and trailer data |
||
| 744 | * |
||
| 745 | * @throws Exception if it was unable to find startxref |
||
| 746 | * @throws Exception if it was unable to find xref |
||
| 747 | */ |
||
| 748 | protected function getXrefData($pdfData, $offset = 0, $xref = []) |
||
| 797 | } |
||
| 798 | |||
| 799 | /** |
||
| 800 | * Parses PDF data and returns extracted data as array. |
||
| 801 | * |
||
| 802 | * @param string $data PDF data to parse |
||
| 803 | * |
||
| 804 | * @return array array of parsed PDF document objects |
||
| 805 | * |
||
| 806 | * @throws Exception if empty PDF data given |
||
| 807 | * @throws Exception if PDF data missing %PDF header |
||
| 808 | */ |
||
| 809 | public function parseData($data) |
||
| 835 | } |
||
| 836 | } |
||
| 837 |
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