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<?php |
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/** |
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* PDFtk wrapper |
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* |
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* @copyright 2014-2019 Institute of Legal Medicine, Medical University of Innsbruck |
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* @author Martin Pircher <[email protected]> |
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* @author Andreas Erhard <[email protected]> |
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* @license LGPL-3.0-only |
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* @link http://www.gerichtsmedizin.at/ |
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* |
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* @package pdftk |
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*/ |
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namespace Gmi\Toolkit\Pdftk; |
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use Gmi\Toolkit\Pdftk\Exception\PdfException; |
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/** |
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* Apply bookmarks to PDF. |
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*/ |
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class Bookmarks |
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{ |
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/** |
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* Bookmarks. |
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* |
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* @var Bookmark[] |
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*/ |
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private $bookmarks = []; |
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/** |
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* Maximum page number. |
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* |
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* @var int |
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*/ |
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private $maxpage = -1; |
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/** |
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* @var PdftkWrapper |
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*/ |
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private $wrapper; |
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/** |
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* Constructor. |
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* |
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* @param PdftkWrapper $wrapper |
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*/ |
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public function __construct(PdftkWrapper $wrapper = null) |
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{ |
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$this->wrapper = $wrapper ?: new PdftkWrapper(); |
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} |
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/** |
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* Add bookmark to page. |
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* |
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* @param Bookmark $bookmark |
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* |
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* @return self |
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*/ |
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public function add(Bookmark $bookmark) |
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{ |
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if (!is_int($bookmark->getPageNumber()) || $bookmark->getPageNumber() < 1) { |
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throw new PdfException(sprintf('Invalid page number: %s', $bookmark->getPageNumber())); |
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} elseif ($this->maxpage > 0 && $bookmark->getPageNumber() > $this->maxpage) { |
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throw new PdfException('Page number out of range!'); |
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} |
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$this->bookmarks[] = $bookmark; |
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return $this; |
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} |
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/** |
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* Returns all bookmarks. |
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* |
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* @return Bookmark[] |
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*/ |
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public function all() |
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{ |
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return $this->bookmarks; |
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} |
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/** |
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* Deletes a bookmark. |
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* |
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* @param Bookmark $bookmark |
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* |
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* @return self |
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*/ |
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public function remove(Bookmark $bookmark) |
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{ |
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foreach ($this->bookmarks as $key => $currentBookmark) { |
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// weak comparison - value objects with equal values are considered equal |
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if ($currentBookmark == $bookmark) { |
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unset($this->bookmarks[$key]); |
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} |
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} |
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$this->resetArrayIndizes(); |
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return $this; |
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} |
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/** |
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* Delete bookmark from page. |
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* |
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* @param int $pageNumber |
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* |
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* @return self |
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*/ |
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public function removeByPageNumber($pageNumber) |
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{ |
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foreach ($this->bookmarks as $key => $currentBookmark) { |
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if ($currentBookmark->getPageNumber() === $pageNumber) { |
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unset($this->bookmarks[$key]); |
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} |
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} |
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$this->resetArrayIndizes(); |
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return $this; |
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} |
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/** |
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* Remove all bookmarks. |
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* |
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* @return self |
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*/ |
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public function clear() |
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{ |
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$this->bookmarks = []; |
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return $this; |
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} |
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/** |
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* Apply bookmarks to PDF file. |
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* |
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* @param string $infile |
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* @param string $outfile |
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* |
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* @return self |
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*/ |
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public function apply($infile, $outfile = null) |
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{ |
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$this->wrapper->updatePdfDataFromDump($infile, $this->buildBookmarksBlock(), $outfile); |
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return $this; |
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} |
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/** |
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* Imports bookmarks from a PDF file. |
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* |
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* @param string $infile |
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* |
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* @return self |
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*/ |
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public function import($infile) |
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{ |
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$dump = $this->wrapper->getPdfDataDump($infile); |
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$this->importFromDump($dump); |
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return $this; |
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} |
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/** |
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* Imports bookmarks from a pdftk dump. |
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* |
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* @param string $dump |
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* |
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* @return self |
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*/ |
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public function importFromDump($dump) |
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{ |
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$matches = []; |
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$regex = '/BookmarkBegin\nBookmarkTitle: (?<title>.+)\n' . |
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'BookmarkLevel: (?<level>[0-9]+)\nBookmarkPageNumber: (?<page>[0-9]+)/'; |
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preg_match_all($regex, $dump, $matches, PREG_SET_ORDER); |
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foreach ($matches as $bm) { |
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$bookmark = new Bookmark(); |
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$bookmark |
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->setTitle($bm['title']) |
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->setPageNumber((int) $bm['page']) |
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->setLevel((int) $bm['level']) |
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; |
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$this->add($bookmark); |
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} |
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return $this; |
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} |
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/** |
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* Sets the maximum page number of the PDF to validate page numbers. |
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* |
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* @internal |
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* |
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* @param int $maxpage |
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* |
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* @return self |
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*/ |
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public function setMaxpage($maxpage) |
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{ |
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$this->maxpage = $maxpage; |
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return $this; |
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} |
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/** |
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* Builds an Bookmark string for all bookmarks. |
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* |
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* @return string |
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*/ |
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private function buildBookmarksBlock() |
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{ |
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$result = ''; |
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foreach ($this->bookmarks as $bookmark) { |
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$result .= $this->buildBookmarkBlock($bookmark); |
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} |
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return $result; |
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} |
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/** |
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* Builds an Bookmark string for a single bookmark. |
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* |
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* @param Bookmark $bookmark |
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* |
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* @return string |
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*/ |
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private function buildBookmarkBlock(Bookmark $bookmark) |
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{ |
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return |
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'BookmarkBegin' . PHP_EOL . |
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'BookmarkTitle: ' . $bookmark->getTitle() . PHP_EOL . |
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'BookmarkLevel: ' . $bookmark->getLevel() . PHP_EOL . |
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'BookmarkPageNumber: ' . $bookmark->getPageNumber() . PHP_EOL; |
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} |
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/** |
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* Resets the bookmark array indizes (e.g. after removal of a bookmark). |
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*/ |
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private function resetArrayIndizes() |
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{ |
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$this->bookmarks = array_values($this->bookmarks); |
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} |
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} |
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