diff options
Diffstat (limited to 'vendor/setasign/fpdi/src/PdfReader/Page.php')
| -rw-r--r-- | vendor/setasign/fpdi/src/PdfReader/Page.php | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/vendor/setasign/fpdi/src/PdfReader/Page.php b/vendor/setasign/fpdi/src/PdfReader/Page.php new file mode 100644 index 0000000..b207c79 --- /dev/null +++ b/vendor/setasign/fpdi/src/PdfReader/Page.php @@ -0,0 +1,271 @@ +<?php + +/** + * This file is part of FPDI + * + * @package setasign\Fpdi + * @copyright Copyright (c) 2020 Setasign GmbH & Co. KG (https://www.setasign.com) + * @license http://opensource.org/licenses/mit-license The MIT License + */ + +namespace setasign\Fpdi\PdfReader; + +use setasign\Fpdi\PdfParser\Filter\FilterException; +use setasign\Fpdi\PdfParser\PdfParser; +use setasign\Fpdi\PdfParser\PdfParserException; +use setasign\Fpdi\PdfParser\Type\PdfArray; +use setasign\Fpdi\PdfParser\Type\PdfDictionary; +use setasign\Fpdi\PdfParser\Type\PdfIndirectObject; +use setasign\Fpdi\PdfParser\Type\PdfNull; +use setasign\Fpdi\PdfParser\Type\PdfNumeric; +use setasign\Fpdi\PdfParser\Type\PdfStream; +use setasign\Fpdi\PdfParser\Type\PdfType; +use setasign\Fpdi\PdfParser\Type\PdfTypeException; +use setasign\Fpdi\PdfReader\DataStructure\Rectangle; +use setasign\Fpdi\PdfParser\CrossReference\CrossReferenceException; + +/** + * Class representing a page of a PDF document + */ +class Page +{ + /** + * @var PdfIndirectObject + */ + protected $pageObject; + + /** + * @var PdfDictionary + */ + protected $pageDictionary; + + /** + * @var PdfParser + */ + protected $parser; + + /** + * Inherited attributes + * + * @var null|array + */ + protected $inheritedAttributes; + + /** + * Page constructor. + * + * @param PdfIndirectObject $page + * @param PdfParser $parser + */ + public function __construct(PdfIndirectObject $page, PdfParser $parser) + { + $this->pageObject = $page; + $this->parser = $parser; + } + + /** + * Get the indirect object of this page. + * + * @return PdfIndirectObject + */ + public function getPageObject() + { + return $this->pageObject; + } + + /** + * Get the dictionary of this page. + * + * @return PdfDictionary + * @throws PdfParserException + * @throws PdfTypeException + * @throws CrossReferenceException + */ + public function getPageDictionary() + { + if (null === $this->pageDictionary) { + $this->pageDictionary = PdfDictionary::ensure(PdfType::resolve($this->getPageObject(), $this->parser)); + } + + return $this->pageDictionary; + } + + /** + * Get a page attribute. + * + * @param string $name + * @param bool $inherited + * @return PdfType|null + * @throws PdfParserException + * @throws PdfTypeException + * @throws CrossReferenceException + */ + public function getAttribute($name, $inherited = true) + { + $dict = $this->getPageDictionary(); + + if (isset($dict->value[$name])) { + return $dict->value[$name]; + } + + $inheritedKeys = ['Resources', 'MediaBox', 'CropBox', 'Rotate']; + if ($inherited && \in_array($name, $inheritedKeys, true)) { + if ($this->inheritedAttributes === null) { + $this->inheritedAttributes = []; + $inheritedKeys = \array_filter($inheritedKeys, function ($key) use ($dict) { + return !isset($dict->value[$key]); + }); + + if (\count($inheritedKeys) > 0) { + $parentDict = PdfType::resolve(PdfDictionary::get($dict, 'Parent'), $this->parser); + while ($parentDict instanceof PdfDictionary) { + foreach ($inheritedKeys as $index => $key) { + if (isset($parentDict->value[$key])) { + $this->inheritedAttributes[$key] = $parentDict->value[$key]; + unset($inheritedKeys[$index]); + } + } + + /** @noinspection NotOptimalIfConditionsInspection */ + if (isset($parentDict->value['Parent']) && \count($inheritedKeys) > 0) { + $parentDict = PdfType::resolve(PdfDictionary::get($parentDict, 'Parent'), $this->parser); + } else { + break; + } + } + } + } + + if (isset($this->inheritedAttributes[$name])) { + return $this->inheritedAttributes[$name]; + } + } + + return null; + } + + /** + * Get the rotation value. + * + * @return int + * @throws PdfParserException + * @throws PdfTypeException + * @throws CrossReferenceException + */ + public function getRotation() + { + $rotation = $this->getAttribute('Rotate'); + if (null === $rotation) { + return 0; + } + + $rotation = PdfNumeric::ensure(PdfType::resolve($rotation, $this->parser))->value % 360; + + if ($rotation < 0) { + $rotation += 360; + } + + return $rotation; + } + + /** + * Get a boundary of this page. + * + * @param string $box + * @param bool $fallback + * @return bool|Rectangle + * @throws PdfParserException + * @throws PdfTypeException + * @throws CrossReferenceException + * @see PageBoundaries + */ + public function getBoundary($box = PageBoundaries::CROP_BOX, $fallback = true) + { + $value = $this->getAttribute($box); + + if ($value !== null) { + return Rectangle::byPdfArray($value, $this->parser); + } + + if ($fallback === false) { + return false; + } + + switch ($box) { + case PageBoundaries::BLEED_BOX: + case PageBoundaries::TRIM_BOX: + case PageBoundaries::ART_BOX: + return $this->getBoundary(PageBoundaries::CROP_BOX, true); + case PageBoundaries::CROP_BOX: + return $this->getBoundary(PageBoundaries::MEDIA_BOX, true); + } + + return false; + } + + /** + * Get the width and height of this page. + * + * @param string $box + * @param bool $fallback + * @return array|bool + * @throws PdfParserException + * @throws PdfTypeException + * @throws CrossReferenceException + */ + public function getWidthAndHeight($box = PageBoundaries::CROP_BOX, $fallback = true) + { + $boundary = $this->getBoundary($box, $fallback); + if ($boundary === false) { + return false; + } + + $rotation = $this->getRotation(); + $interchange = ($rotation / 90) % 2; + + return [ + $interchange ? $boundary->getHeight() : $boundary->getWidth(), + $interchange ? $boundary->getWidth() : $boundary->getHeight() + ]; + } + + /** + * Get the raw content stream. + * + * @return string + * @throws PdfReaderException + * @throws PdfTypeException + * @throws FilterException + * @throws PdfParserException + */ + public function getContentStream() + { + $dict = $this->getPageDictionary(); + $contents = PdfType::resolve(PdfDictionary::get($dict, 'Contents'), $this->parser); + if ($contents instanceof PdfNull) { + return ''; + } + + if ($contents instanceof PdfArray) { + $result = []; + foreach ($contents->value as $content) { + $content = PdfType::resolve($content, $this->parser); + if (!($content instanceof PdfStream)) { + continue; + } + $result[] = $content->getUnfilteredStream(); + } + + return \implode("\n", $result); + } + + if ($contents instanceof PdfStream) { + return $contents->getUnfilteredStream(); + } + + throw new PdfReaderException( + 'Array or stream expected.', + PdfReaderException::UNEXPECTED_DATA_TYPE + ); + } +} |