Added PDF for pregenerated PDF
This commit is contained in:
Torsten Schulz
420
vendor/setasign/fpdi/src/PdfReader/Page.php
vendored
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420
vendor/setasign/fpdi/src/PdfReader/Page.php
vendored
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<?php
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/**
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* This file is part of FPDI
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*
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* @package setasign\Fpdi
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* @copyright Copyright (c) 2023 Setasign GmbH & Co. KG (https://www.setasign.com)
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* @license http://opensource.org/licenses/mit-license The MIT License
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*/
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namespace setasign\Fpdi\PdfReader;
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use setasign\Fpdi\FpdiException;
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use setasign\Fpdi\GraphicsState;
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use setasign\Fpdi\Math\Vector;
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use setasign\Fpdi\PdfParser\Filter\FilterException;
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use setasign\Fpdi\PdfParser\PdfParser;
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use setasign\Fpdi\PdfParser\PdfParserException;
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use setasign\Fpdi\PdfParser\Type\PdfArray;
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use setasign\Fpdi\PdfParser\Type\PdfDictionary;
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use setasign\Fpdi\PdfParser\Type\PdfHexString;
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use setasign\Fpdi\PdfParser\Type\PdfIndirectObject;
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use setasign\Fpdi\PdfParser\Type\PdfName;
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use setasign\Fpdi\PdfParser\Type\PdfNull;
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use setasign\Fpdi\PdfParser\Type\PdfNumeric;
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use setasign\Fpdi\PdfParser\Type\PdfStream;
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use setasign\Fpdi\PdfParser\Type\PdfString;
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use setasign\Fpdi\PdfParser\Type\PdfType;
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use setasign\Fpdi\PdfParser\Type\PdfTypeException;
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use setasign\Fpdi\PdfReader\DataStructure\Rectangle;
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use setasign\Fpdi\PdfParser\CrossReference\CrossReferenceException;
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/**
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* Class representing a page of a PDF document
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*/
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class Page
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{
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/**
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* @var PdfIndirectObject
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*/
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protected $pageObject;
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/**
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* @var PdfDictionary
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*/
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protected $pageDictionary;
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/**
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* @var PdfParser
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*/
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protected $parser;
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/**
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* Inherited attributes
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*
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* @var null|array
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*/
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protected $inheritedAttributes;
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/**
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* Page constructor.
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*
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* @param PdfIndirectObject $page
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* @param PdfParser $parser
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*/
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public function __construct(PdfIndirectObject $page, PdfParser $parser)
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{
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$this->pageObject = $page;
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$this->parser = $parser;
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}
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/**
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* Get the indirect object of this page.
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*
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* @return PdfIndirectObject
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*/
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public function getPageObject()
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{
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return $this->pageObject;
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}
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/**
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* Get the dictionary of this page.
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*
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* @return PdfDictionary
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* @throws PdfParserException
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* @throws PdfTypeException
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* @throws CrossReferenceException
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*/
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public function getPageDictionary()
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{
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if ($this->pageDictionary === null) {
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$this->pageDictionary = PdfDictionary::ensure(PdfType::resolve($this->getPageObject(), $this->parser));
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}
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return $this->pageDictionary;
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}
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/**
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* Get a page attribute.
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*
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* @param string $name
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* @param bool $inherited
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* @return PdfType|null
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* @throws PdfParserException
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* @throws PdfTypeException
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* @throws CrossReferenceException
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*/
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public function getAttribute($name, $inherited = true)
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{
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$dict = $this->getPageDictionary();
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if (isset($dict->value[$name])) {
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return $dict->value[$name];
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}
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$inheritedKeys = ['Resources', 'MediaBox', 'CropBox', 'Rotate'];
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if ($inherited && \in_array($name, $inheritedKeys, true)) {
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if ($this->inheritedAttributes === null) {
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$this->inheritedAttributes = [];
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$inheritedKeys = \array_filter($inheritedKeys, function ($key) use ($dict) {
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return !isset($dict->value[$key]);
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});
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if (\count($inheritedKeys) > 0) {
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$parentDict = PdfType::resolve(PdfDictionary::get($dict, 'Parent'), $this->parser);
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while ($parentDict instanceof PdfDictionary) {
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foreach ($inheritedKeys as $index => $key) {
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if (isset($parentDict->value[$key])) {
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$this->inheritedAttributes[$key] = $parentDict->value[$key];
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unset($inheritedKeys[$index]);
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}
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}
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/** @noinspection NotOptimalIfConditionsInspection */
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if (isset($parentDict->value['Parent']) && \count($inheritedKeys) > 0) {
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$parentDict = PdfType::resolve(PdfDictionary::get($parentDict, 'Parent'), $this->parser);
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} else {
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break;
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}
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}
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}
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}
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if (isset($this->inheritedAttributes[$name])) {
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return $this->inheritedAttributes[$name];
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}
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}
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return null;
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}
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/**
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* Get the rotation value.
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*
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* @return int
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* @throws PdfParserException
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* @throws PdfTypeException
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* @throws CrossReferenceException
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*/
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public function getRotation()
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{
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$rotation = $this->getAttribute('Rotate');
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if ($rotation === null) {
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return 0;
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}
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$rotation = PdfNumeric::ensure(PdfType::resolve($rotation, $this->parser))->value % 360;
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if ($rotation < 0) {
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$rotation += 360;
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}
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return $rotation;
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}
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/**
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* Get a boundary of this page.
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*
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* @param string $box
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* @param bool $fallback
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* @return bool|Rectangle
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* @throws PdfParserException
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* @throws PdfTypeException
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* @throws CrossReferenceException
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* @see PageBoundaries
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*/
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public function getBoundary($box = PageBoundaries::CROP_BOX, $fallback = true)
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{
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$value = $this->getAttribute($box);
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if ($value !== null) {
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return Rectangle::byPdfArray($value, $this->parser);
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}
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if ($fallback === false) {
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return false;
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}
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switch ($box) {
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case PageBoundaries::BLEED_BOX:
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case PageBoundaries::TRIM_BOX:
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case PageBoundaries::ART_BOX:
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return $this->getBoundary(PageBoundaries::CROP_BOX, true);
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case PageBoundaries::CROP_BOX:
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return $this->getBoundary(PageBoundaries::MEDIA_BOX, true);
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}
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return false;
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}
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/**
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* Get the width and height of this page.
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*
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* @param string $box
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* @param bool $fallback
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* @return array|bool
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* @throws PdfParserException
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* @throws PdfTypeException
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* @throws CrossReferenceException
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*/
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public function getWidthAndHeight($box = PageBoundaries::CROP_BOX, $fallback = true)
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{
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$boundary = $this->getBoundary($box, $fallback);
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if ($boundary === false) {
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return false;
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}
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$rotation = $this->getRotation();
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$interchange = ($rotation / 90) % 2;
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return [
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$interchange ? $boundary->getHeight() : $boundary->getWidth(),
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$interchange ? $boundary->getWidth() : $boundary->getHeight()
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];
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}
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/**
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* Get the raw content stream.
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*
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* @return string
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* @throws PdfReaderException
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* @throws PdfTypeException
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* @throws FilterException
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* @throws PdfParserException
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*/
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public function getContentStream()
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{
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$dict = $this->getPageDictionary();
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$contents = PdfType::resolve(PdfDictionary::get($dict, 'Contents'), $this->parser);
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if ($contents instanceof PdfNull) {
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return '';
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}
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if ($contents instanceof PdfArray) {
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$result = [];
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foreach ($contents->value as $content) {
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$content = PdfType::resolve($content, $this->parser);
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if (!($content instanceof PdfStream)) {
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continue;
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}
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$result[] = $content->getUnfilteredStream();
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}
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return \implode("\n", $result);
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}
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if ($contents instanceof PdfStream) {
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return $contents->getUnfilteredStream();
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}
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throw new PdfReaderException(
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'Array or stream expected.',
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PdfReaderException::UNEXPECTED_DATA_TYPE
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);
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}
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/**
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* Get information of all external links on this page.
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*
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* All coordinates are normalized in view to rotation and translation of the boundary-box, so that their
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* origin is lower-left.
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*
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* @return array
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*/
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public function getExternalLinks($box = PageBoundaries::CROP_BOX)
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{
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try {
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$dict = $this->getPageDictionary();
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$annotations = PdfType::resolve(PdfDictionary::get($dict, 'Annots'), $this->parser);
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} catch (FpdiException $e) {
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return [];
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}
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if (!$annotations instanceof PdfArray) {
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return [];
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}
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$links = [];
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foreach ($annotations->value as $entry) {
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try {
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$annotation = PdfType::resolve($entry, $this->parser);
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$value = PdfType::resolve(PdfDictionary::get($annotation, 'Subtype'), $this->parser);
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if (!$value instanceof PdfName || $value->value !== 'Link') {
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continue;
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}
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$dest = PdfType::resolve(PdfDictionary::get($annotation, 'Dest'), $this->parser);
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if (!$dest instanceof PdfNull) {
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continue;
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}
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$action = PdfType::resolve(PdfDictionary::get($annotation, 'A'), $this->parser);
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if (!$action instanceof PdfDictionary) {
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continue;
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}
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$actionType = PdfType::resolve(PdfDictionary::get($action, 'S'), $this->parser);
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if (!$actionType instanceof PdfName || $actionType->value !== 'URI') {
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continue;
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}
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$uri = PdfType::resolve(PdfDictionary::get($action, 'URI'), $this->parser);
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if ($uri instanceof PdfString) {
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$uriValue = PdfString::unescape($uri->value);
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} elseif ($uri instanceof PdfHexString) {
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$uriValue = \hex2bin($uri->value);
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} else {
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continue;
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}
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$rect = PdfType::resolve(PdfDictionary::get($annotation, 'Rect'), $this->parser);
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if (!$rect instanceof PdfArray || count($rect->value) !== 4) {
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continue;
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}
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$rect = Rectangle::byPdfArray($rect, $this->parser);
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if ($rect->getWidth() === 0 || $rect->getHeight() === 0) {
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continue;
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}
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$bbox = $this->getBoundary($box);
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$rotation = $this->getRotation();
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$gs = new GraphicsState();
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$gs->translate(-$bbox->getLlx(), -$bbox->getLly());
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$gs->rotate($bbox->getLlx(), $bbox->getLly(), -$rotation);
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switch ($rotation) {
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case 90:
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$gs->translate(-$bbox->getWidth(), 0);
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break;
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case 180:
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$gs->translate(-$bbox->getWidth(), -$bbox->getHeight());
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break;
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case 270:
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$gs->translate(0, -$bbox->getHeight());
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break;
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}
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$normalizedRect = Rectangle::byVectors(
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$gs->toUserSpace(new Vector($rect->getLlx(), $rect->getLly())),
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$gs->toUserSpace(new Vector($rect->getUrx(), $rect->getUry()))
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);
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$quadPoints = PdfType::resolve(PdfDictionary::get($annotation, 'QuadPoints'), $this->parser);
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$normalizedQuadPoints = [];
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if ($quadPoints instanceof PdfArray) {
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$quadPointsCount = count($quadPoints->value);
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if ($quadPointsCount % 8 === 0) {
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for ($i = 0; ($i + 1) < $quadPointsCount; $i += 2) {
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$x = PdfNumeric::ensure(PdfType::resolve($quadPoints->value[$i], $this->parser));
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$y = PdfNumeric::ensure(PdfType::resolve($quadPoints->value[$i + 1], $this->parser));
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$v = $gs->toUserSpace(new Vector($x->value, $y->value));
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$normalizedQuadPoints[] = $v->getX();
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$normalizedQuadPoints[] = $v->getY();
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}
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}
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}
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// we remove unsupported/unneeded values here
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unset(
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$annotation->value['P'],
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$annotation->value['NM'],
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$annotation->value['AP'],
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$annotation->value['AS'],
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$annotation->value['Type'],
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$annotation->value['Subtype'],
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$annotation->value['Rect'],
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$annotation->value['A'],
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$annotation->value['QuadPoints'],
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$annotation->value['Rotate'],
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$annotation->value['M'],
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$annotation->value['StructParent'],
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$annotation->value['OC']
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);
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// ...and flatten the PDF object to eliminate any indirect references.
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// Indirect references are a problem when writing the output in FPDF
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// because FPDF uses pre-calculated object numbers while FPDI creates
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// them at runtime.
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$annotation = PdfType::flatten($annotation, $this->parser);
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$links[] = [
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'rect' => $normalizedRect,
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'quadPoints' => $normalizedQuadPoints,
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'uri' => $uriValue,
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'pdfObject' => $annotation
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];
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} catch (FpdiException $e) {
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continue;
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}
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}
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return $links;
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}
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}
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