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Current Path : /var/www/plugins/content/pdf_embed/
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Current File : /var/www/plugins/content/pdf_embed/pdf_embed.php

<?php
/**
 * @package    PdfEmbed
 *
 * @author     Techjoomla <extensions@techjoomla.com>
 * @copyright  Copyright (C) 2010 - 2020 Techjoomla. All rights reserved.
 * @license    http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
 */

// No direct access.
defined('_JEXEC') or die();

use Joomla\CMS\Factory;
use Joomla\CMS\Uri\Uri;
use Joomla\CMS\Language\Text;
use Joomla\CMS\HTML\HTMLHelper;
use Joomla\CMS\Plugin\CMSPlugin;

/**
 * Class for Plg_pdf_embed
 *
 * @package  PdfEmbed
 * @since    1.0
 */
class PlgContentPdf_Embed extends CMSPlugin
{
	protected $autoloadLanguage = true;

	private static $loadPdfjs = false;

	private static $linkCount = 0;

	/**
	 * takes the parameter for pdf
	 *
	 * @param   string   $context  The context of the content being passed to the plugin.
	 *
	 * @param   object   $row      The article object.  Note $article->text is also available
	 * @param   object   $params   The article params
	 * @param   integer  $page     The 'page' number
	 *
	 * @return   html for the pdf
	 *
	 * @since   1.0
	 */
	public function onContentPrepare($context, $row, $params, $page = 0)
	{
		$document = Factory::getDocument();
		$document->addStyleSheet(Uri::root(true) . "/plugins/content/pdf_embed/assets/css/style.css");

		$regex  = "#{pdf[\=|\s]?(.+)}#s";
		$regex1 = '/{(pdf=)\s*(.*?)}/i';

		// Find all instances of mambot and put in $matches
		preg_match_all($regex1, $row->text, $matches);

		// Number of mambots
		$count = count($matches[0]);

		for ($i = 0; $i < $count; $i++)
		{
			$r  = str_replace('{pdf=', '', $matches[0][$i]);
			$r  = str_replace('}', '', $r);
			$ex = explode('|', $r);
			$ploc = $ex[0];
			$w   = $ex[1];
			$isWidthInPer = strpos($w, '%');
			$isWidthInPix = strpos($w, 'px');

			// Check if width is in percentage and pixel
			if (!$isWidthInPer && !$isWidthInPix)
			{
				$w = $w . 'px';
			}

			$h = $ex[2];
			$isHeightInPer = strpos($h, '%');
			$isHeightInPix = strpos($h, 'px');

			// Check if width is in percentage and pixel
			if (!$isHeightInPer && !$isHeightInPix)
			{
				$h = $h . 'px';
			}

			if (isset($ex[3]))
			{
				$viewer      = $ex[3];
				$replace   = $this->plg_pdfembed_replacer($ploc, $w, $h, $viewer, $row->id);
				$row->text = str_replace('{pdf=' . $ex[0] . '|' . $ex[1] . '|' . $ex[2] . '|' . $ex[3] . '}', $replace, $row->text);
			}
			else
			{
				$viewer    = $this->params->def('viewer', 'native');
				$replace   = $this->plg_pdfembed_replacer($ploc, $w, $h, $viewer, $row->id);
				$row->text = str_replace('{pdf=' . $ex[0] . '|' . $ex[1] . '|' . $ex[2] . '}', $replace, $row->text);
			}
		}

		return true;
	}

	/**
	 * Gets  the pdf in site article
	 *
	 * @param   string   $ploc       Takes the address of pdf location
	 * @param   integer  $w          Takes width of pdf
	 * @param   integer  $h          Takes height of pdf
	 * @param   string   $viewer     Takes the view user want to use
	 * @param   integer  $articleId  Takes the article Id
	 *
	 * @return  string in the article
	 */
	public function plg_pdfembed_replacer($ploc, $w, $h, $viewer, $articleId)
	{
		$ploc     = trim($ploc);

		switch ($viewer)
		{
			case "google":
				$ploc = urlencode($ploc);

				return '<div class ="">
							<iframe src="https://docs.google.com/gview?url=' . $ploc . '&embedded=true" style="width:' . $w . '; height:' . $h . ';" frameborder="1">
							</iframe>
						</div>';

			case "pdfjs":
				$this->loadPdfjs();
				$ploc 	= urlencode($ploc);
				$pdfUrl = Uri::root(true) . '/plugins/content/pdf_embed/assets/viewer/pdfjs/web/viewer.html?file=' . $ploc;

				return '<div class ="">
							<iframe class="pdfjspreview" src="' . $pdfUrl . '" style="width:' . $w . '; height:' . $h . ';" frameborder="1">
							</iframe>
						</div>';

			case "link":
				$ploc 	   = urlencode($ploc);
				$id        = 'pdfLinkModal_' . $articleId . '_' . self::$linkCount++;

				return '<a href="#" data-toggle="modal" data-target="#' . $id . '">' .
							Text::_("PLG_CONTENT_PDF_EMBED_LINK_TEXT") . '
						</a>
						<!-- Modal -->
						<div class="modal fade" id="' . $id . '" tabindex="' . $id . '" 
						role="dialog" aria-labelledby="' . $id . '" aria-hidden="true">
						  <div class="modal-dialog">
						    <div class="modal-content">
						      <div class="modal-body">
						        <div style="text-align: center;">
									<iframe src="https://docs.google.com/gview?url=' . $ploc . '&embedded=true" 
									style="width:500px; height:500px;" frameborder="0"></iframe>
								</div>
						      </div>
						    </div>
						  </div>
						</div>';

			default:

				return '<div class ="embed-container native-embed-container">
						<embed src="' . $ploc . '" style="width:' . $w . '; height:' . $h . ';" frameborder="1"/></div>';
		}
	}

	/**
	 * Load js file for pdfjs viewer
	 *
	 * @return  void
	 */
	private function loadPdfjs()
	{
		if (!self::$loadPdfjs)
		{
			$download = $this->params->def('download', '1');
			$print    = $this->params->def('print', '1');
			$document = Factory::getDocument();
			$document->addScriptDeclaration('const tjPdfJsDownload = "' . $download . '";const tjPdfJsPrint = "' . $print . '";');
			HTMLHelper::_('script', 'media/pdf_embed/js/myviewer.min.js');
			self::$loadPdfjs = true;
		}
	}
}