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<?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;
use setasign\Fpdi\PdfParser\CrossReference\CrossReferenceException;
use setasign\Fpdi\PdfParser\Filter\FilterException;
use setasign\Fpdi\PdfParser\PdfParser;
use setasign\Fpdi\PdfParser\PdfParserException;
use setasign\Fpdi\PdfParser\StreamReader;
use setasign\Fpdi\PdfParser\Type\PdfArray;
use setasign\Fpdi\PdfParser\Type\PdfBoolean;
use setasign\Fpdi\PdfParser\Type\PdfDictionary;
use setasign\Fpdi\PdfParser\Type\PdfHexString;
use setasign\Fpdi\PdfParser\Type\PdfIndirectObject;
use setasign\Fpdi\PdfParser\Type\PdfIndirectObjectReference;
use setasign\Fpdi\PdfParser\Type\PdfName;
use setasign\Fpdi\PdfParser\Type\PdfNull;
use setasign\Fpdi\PdfParser\Type\PdfNumeric;
use setasign\Fpdi\PdfParser\Type\PdfStream;
use setasign\Fpdi\PdfParser\Type\PdfString;
use setasign\Fpdi\PdfParser\Type\PdfToken;
use setasign\Fpdi\PdfParser\Type\PdfType;
use setasign\Fpdi\PdfParser\Type\PdfTypeException;
use setasign\Fpdi\PdfReader\PageBoundaries;
use setasign\Fpdi\PdfReader\PdfReader;
use setasign\Fpdi\PdfReader\PdfReaderException;
use /* This namespace/class is used by the commercial FPDI PDF-Parser add-on. */
/** @noinspection PhpUndefinedClassInspection */
/** @noinspection PhpUndefinedNamespaceInspection */
setasign\FpdiPdfParser\PdfParser\PdfParser as FpdiPdfParser;
/**
* The FpdiTrait
*
* This trait offers the core functionalities of FPDI. By passing them to a trait we can reuse it with e.g. TCPDF in a
* very easy way.
*/
trait FpdiTrait
{
/**
* The pdf reader instances.
*
* @var PdfReader[]
*/
protected $readers = [];
/**
* Instances created internally.
*
* @var array
*/
protected $createdReaders = [];
/**
* The current reader id.
*
* @var string|null
*/
protected $currentReaderId;
/**
* Data of all imported pages.
*
* @var array
*/
protected $importedPages = [];
/**
* A map from object numbers of imported objects to new assigned object numbers by FPDF.
*
* @var array
*/
protected $objectMap = [];
/**
* An array with information about objects, which needs to be copied to the resulting document.
*
* @var array
*/
protected $objectsToCopy = [];
/**
* Release resources and file handles.
*
* This method is called internally when the document is created successfully. By default it only cleans up
* stream reader instances which were created internally.
*
* @param bool $allReaders
*/
public function cleanUp($allReaders = false)
{
$readers = $allReaders ? array_keys($this->readers) : $this->createdReaders;
foreach ($readers as $id) {
$this->readers[$id]->getParser()->getStreamReader()->cleanUp();
unset($this->readers[$id]);
}
$this->createdReaders = [];
}
/**
* Set the minimal PDF version.
*
* @param string $pdfVersion
*/
protected function setMinPdfVersion($pdfVersion)
{
if (\version_compare($pdfVersion, $this->PDFVersion, '>')) {
$this->PDFVersion = $pdfVersion;
}
}
/** @noinspection PhpUndefinedClassInspection */
/**
* Get a new pdf parser instance.
*
* @param StreamReader $streamReader
* @return PdfParser|FpdiPdfParser
*/
protected function getPdfParserInstance(StreamReader $streamReader)
{
// note: if you get an exception here - turn off errors/warnings on not found for your autoloader.
// psr-4 (https://www.php-fig.org/psr/psr-4/) says: Autoloader implementations MUST NOT throw
// exceptions, MUST NOT raise errors of any level, and SHOULD NOT return a value.
/** @noinspection PhpUndefinedClassInspection */
if (\class_exists(FpdiPdfParser::class)) {
/** @noinspection PhpUndefinedClassInspection */
return new FpdiPdfParser($streamReader);
}
return new PdfParser($streamReader);
}
/**
* Get an unique reader id by the $file parameter.
*
* @param string|resource|PdfReader|StreamReader $file An open file descriptor, a path to a file, a PdfReader
* instance or a StreamReader instance.
* @return string
*/
protected function getPdfReaderId($file)
{
if (\is_resource($file)) {
$id = (string) $file;
} elseif (\is_string($file)) {
$id = \realpath($file);
if ($id === false) {
$id = $file;
}
} elseif (\is_object($file)) {
$id = \spl_object_hash($file);
} else {
throw new \InvalidArgumentException(
\sprintf('Invalid type in $file parameter (%s)', \gettype($file))
);
}
/** @noinspection OffsetOperationsInspection */
if (isset($this->readers[$id])) {
return $id;
}
if (\is_resource($file)) {
$streamReader = new StreamReader($file);
} elseif (\is_string($file)) {
$streamReader = StreamReader::createByFile($file);
$this->createdReaders[] = $id;
} else {
$streamReader = $file;
}
$reader = new PdfReader($this->getPdfParserInstance($streamReader));
/** @noinspection OffsetOperationsInspection */
$this->readers[$id] = $reader;
return $id;
}
/**
* Get a pdf reader instance by its id.
*
* @param string $id
* @return PdfReader
*/
protected function getPdfReader($id)
{
if (isset($this->readers[$id])) {
return $this->readers[$id];
}
throw new \InvalidArgumentException(
\sprintf('No pdf reader with the given id (%s) exists.', $id)
);
}
/**
* Set the source PDF file.
*
* @param string|resource|StreamReader $file Path to the file or a stream resource or a StreamReader instance.
* @return int The page count of the PDF document.
* @throws PdfParserException
*/
public function setSourceFile($file)
{
$this->currentReaderId = $this->getPdfReaderId($file);
$this->objectsToCopy[$this->currentReaderId] = [];
$reader = $this->getPdfReader($this->currentReaderId);
$this->setMinPdfVersion($reader->getPdfVersion());
return $reader->getPageCount();
}
/**
* Imports a page.
*
* @param int $pageNumber The page number.
* @param string $box The page boundary to import. Default set to PageBoundaries::CROP_BOX.
* @param bool $groupXObject Define the form XObject as a group XObject to support transparency (if used).
* @return string A unique string identifying the imported page.
* @throws CrossReferenceException
* @throws FilterException
* @throws PdfParserException
* @throws PdfTypeException
* @throws PdfReaderException
* @see PageBoundaries
*/
public function importPage($pageNumber, $box = PageBoundaries::CROP_BOX, $groupXObject = true)
{
if (null === $this->currentReaderId) {
throw new \BadMethodCallException('No reader initiated. Call setSourceFile() first.');
}
$pageId = $this->currentReaderId;
$pageNumber = (int)$pageNumber;
$pageId .= '|' . $pageNumber . '|' . ($groupXObject ? '1' : '0');
// for backwards compatibility with FPDI 1
$box = \ltrim($box, '/');
if (!PageBoundaries::isValidName($box)) {
throw new \InvalidArgumentException(
\sprintf('Box name is invalid: "%s"', $box)
);
}
$pageId .= '|' . $box;
if (isset($this->importedPages[$pageId])) {
return $pageId;
}
$reader = $this->getPdfReader($this->currentReaderId);
$page = $reader->getPage($pageNumber);
$bbox = $page->getBoundary($box);
if ($bbox === false) {
throw new PdfReaderException(
\sprintf("Page doesn't have a boundary box (%s).", $box),
PdfReaderException::MISSING_DATA
);
}
$dict = new PdfDictionary();
$dict->value['Type'] = PdfName::create('XObject');
$dict->value['Subtype'] = PdfName::create('Form');
$dict->value['FormType'] = PdfNumeric::create(1);
$dict->value['BBox'] = $bbox->toPdfArray();
if ($groupXObject) {
$this->setMinPdfVersion('1.4');
$dict->value['Group'] = PdfDictionary::create([
'Type' => PdfName::create('Group'),
'S' => PdfName::create('Transparency')
]);
}
$resources = $page->getAttribute('Resources');
if ($resources !== null) {
$dict->value['Resources'] = $resources;
}
list($width, $height) = $page->getWidthAndHeight($box);
$a = 1;
$b = 0;
$c = 0;
$d = 1;
$e = -$bbox->getLlx();
$f = -$bbox->getLly();
$rotation = $page->getRotation();
if ($rotation !== 0) {
$rotation *= -1;
$angle = $rotation * M_PI / 180;
$a = \cos($angle);
$b = \sin($angle);
$c = -$b;
$d = $a;
switch ($rotation) {
case -90:
$e = -$bbox->getLly();
$f = $bbox->getUrx();
break;
case -180:
$e = $bbox->getUrx();
$f = $bbox->getUry();
break;
case -270:
$e = $bbox->getUry();
$f = -$bbox->getLlx();
break;
}
}
// we need to rotate/translate
if ($a != 1 || $b != 0 || $c != 0 || $d != 1 || $e != 0 || $f != 0) {
$dict->value['Matrix'] = PdfArray::create([
PdfNumeric::create($a), PdfNumeric::create($b), PdfNumeric::create($c),
PdfNumeric::create($d), PdfNumeric::create($e), PdfNumeric::create($f)
]);
}
// try to use the existing content stream
$pageDict = $page->getPageDictionary();
try {
$contentsObject = PdfType::resolve(PdfDictionary::get($pageDict, 'Contents'), $reader->getParser(), true);
$contents = PdfType::resolve($contentsObject, $reader->getParser());
// just copy the stream reference if it is only a single stream
if (
($contentsIsStream = ($contents instanceof PdfStream))
|| ($contents instanceof PdfArray && \count($contents->value) === 1)
) {
if ($contentsIsStream) {
/**
* @var PdfIndirectObject $contentsObject
*/
$stream = $contents;
} else {
$stream = PdfType::resolve($contents->value[0], $reader->getParser());
}
$filter = PdfDictionary::get($stream->value, 'Filter');
if (!$filter instanceof PdfNull) {
$dict->value['Filter'] = $filter;
}
$length = PdfType::resolve(PdfDictionary::get($stream->value, 'Length'), $reader->getParser());
$dict->value['Length'] = $length;
$stream->value = $dict;
// otherwise extract it from the array and re-compress the whole stream
} else {
$streamContent = $this->compress
? \gzcompress($page->getContentStream())
: $page->getContentStream();
$dict->value['Length'] = PdfNumeric::create(\strlen($streamContent));
if ($this->compress) {
$dict->value['Filter'] = PdfName::create('FlateDecode');
}
$stream = PdfStream::create($dict, $streamContent);
}
// Catch faulty pages and use an empty content stream
} catch (FpdiException $e) {
$dict->value['Length'] = PdfNumeric::create(0);
$stream = PdfStream::create($dict, '');
}
$this->importedPages[$pageId] = [
'objectNumber' => null,
'readerId' => $this->currentReaderId,
'id' => 'TPL' . $this->getNextTemplateId(),
'width' => $width / $this->k,
'height' => $height / $this->k,
'stream' => $stream
];
return $pageId;
}
/**
* Draws an imported page onto the page.
*
* Give only one of the size parameters (width, height) to calculate the other one automatically in view to the
* aspect ratio.
*
* @param mixed $pageId The page id
* @param float|int|array $x The abscissa of upper-left corner. Alternatively you could use an assoc array
* with the keys "x", "y", "width", "height", "adjustPageSize".
* @param float|int $y The ordinate of upper-left corner.
* @param float|int|null $width The width.
* @param float|int|null $height The height.
* @param bool $adjustPageSize
* @return array The size.
* @see Fpdi::getTemplateSize()
*/
public function useImportedPage($pageId, $x = 0, $y = 0, $width = null, $height = null, $adjustPageSize = false)
{
if (\is_array($x)) {
/** @noinspection OffsetOperationsInspection */
unset($x['pageId']);
\extract($x, EXTR_IF_EXISTS);
/** @noinspection NotOptimalIfConditionsInspection */
if (\is_array($x)) {
$x = 0;
}
}
if (!isset($this->importedPages[$pageId])) {
throw new \InvalidArgumentException('Imported page does not exist!');
}
$importedPage = $this->importedPages[$pageId];
$originalSize = $this->getTemplateSize($pageId);
$newSize = $this->getTemplateSize($pageId, $width, $height);
if ($adjustPageSize) {
$this->setPageFormat($newSize, $newSize['orientation']);
}
$this->_out(
// reset standard values, translate and scale
\sprintf(
'q 0 J 1 w 0 j 0 G 0 g %.4F 0 0 %.4F %.4F %.4F cm /%s Do Q',
($newSize['width'] / $originalSize['width']),
($newSize['height'] / $originalSize['height']),
$x * $this->k,
($this->h - $y - $newSize['height']) * $this->k,
$importedPage['id']
)
);
return $newSize;
}
/**
* Get the size of an imported page.
*
* Give only one of the size parameters (width, height) to calculate the other one automatically in view to the
* aspect ratio.
*
* @param mixed $tpl The template id
* @param float|int|null $width The width.
* @param float|int|null $height The height.
* @return array|bool An array with following keys: width, height, 0 (=width), 1 (=height), orientation (L or P)
*/
public function getImportedPageSize($tpl, $width = null, $height = null)
{
if (isset($this->importedPages[$tpl])) {
$importedPage = $this->importedPages[$tpl];
if ($width === null && $height === null) {
$width = $importedPage['width'];
$height = $importedPage['height'];
} elseif ($width === null) {
$width = $height * $importedPage['width'] / $importedPage['height'];
}
if ($height === null) {
$height = $width * $importedPage['height'] / $importedPage['width'];
}
if ($height <= 0. || $width <= 0.) {
throw new \InvalidArgumentException('Width or height parameter needs to be larger than zero.');
}
return [
'width' => $width,
'height' => $height,
0 => $width,
1 => $height,
'orientation' => $width > $height ? 'L' : 'P'
];
}
return false;
}
/**
* Writes a PdfType object to the resulting buffer.
*
* @param PdfType $value
* @throws PdfTypeException
*/
protected function writePdfType(PdfType $value)
{
if ($value instanceof PdfNumeric) {
if (\is_int($value->value)) {
$this->_put($value->value . ' ', false);
} else {
$this->_put(\rtrim(\rtrim(\sprintf('%.5F', $value->value), '0'), '.') . ' ', false);
}
} elseif ($value instanceof PdfName) {
$this->_put('/' . $value->value . ' ', false);
} elseif ($value instanceof PdfString) {
$this->_put('(' . $value->value . ')', false);
} elseif ($value instanceof PdfHexString) {
$this->_put('<' . $value->value . '>');
} elseif ($value instanceof PdfBoolean) {
$this->_put($value->value ? 'true ' : 'false ', false);
} elseif ($value instanceof PdfArray) {
$this->_put('[', false);
foreach ($value->value as $entry) {
$this->writePdfType($entry);
}
$this->_put(']');
} elseif ($value instanceof PdfDictionary) {
$this->_put('<<', false);
foreach ($value->value as $name => $entry) {
$this->_put('/' . $name . ' ', false);
$this->writePdfType($entry);
}
$this->_put('>>');
} elseif ($value instanceof PdfToken) {
$this->_put($value->value);
} elseif ($value instanceof PdfNull) {
$this->_put('null ');
} elseif ($value instanceof PdfStream) {
/**
* @var $value PdfStream
*/
$this->writePdfType($value->value);
$this->_put('stream');
$this->_put($value->getStream());
$this->_put('endstream');
} elseif ($value instanceof PdfIndirectObjectReference) {
if (!isset($this->objectMap[$this->currentReaderId])) {
$this->objectMap[$this->currentReaderId] = [];
}
if (!isset($this->objectMap[$this->currentReaderId][$value->value])) {
$this->objectMap[$this->currentReaderId][$value->value] = ++$this->n;
$this->objectsToCopy[$this->currentReaderId][] = $value->value;
}
$this->_put($this->objectMap[$this->currentReaderId][$value->value] . ' 0 R ', false);
} elseif ($value instanceof PdfIndirectObject) {
/**
* @var PdfIndirectObject $value
*/
$n = $this->objectMap[$this->currentReaderId][$value->objectNumber];
$this->_newobj($n);
$this->writePdfType($value->value);
$this->_put('endobj');
}
}
}