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<?php namespace Maatwebsite\Excel\Parsers;
use DOMDocument;
use Illuminate\Support\Facades\URL;
use TijsVerkoyen\CssToInlineStyles\CssToInlineStyles;
/**
*
* LaravelExcel CSS Parser
*
* @category Laravel Excel
* @version 1.0.0
* @package maatwebsite/excel
* @copyright Copyright (c) 2013 - 2014 Maatwebsite (http://www.maatwebsite.nl)
* @author Maatwebsite <info@maatwebsite.nl>
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
*/
class CssParser {
/**
* @var CssToInlineStyles
*/
protected $cssInliner;
/**
* DOM xml
* @var \SimpleXMLElement
*/
protected $xml;
/**
* Style sheet links
* @var array
*/
protected $links = [];
/**
* Construct the css parser
* @param CssToInlineStyles $cssInliner
*/
public function __construct(CssToInlineStyles $cssInliner)
{
$this->cssInliner = $cssInliner;
}
/**
* Transform the found css to inline styles
*/
public function transformCssToInlineStyles($html)
{
$css = '';
// Loop through all stylesheets
foreach($this->links as $link)
{
$css .= file_get_contents($link);
}
return $this->cssInliner->convert($html, $css);
}
/**
* Find the stylesheets inside the view
* @param DOMDocument $dom
* @return CssParser
*/
public function findStyleSheets(DOMDocument $dom)
{
// Import the dom
$this->importDom($dom);
// Get all stylesheet tags
$tags = $this->getStyleSheetTags();
foreach ($tags as $node)
{
$this->links[] = $this->getCleanStyleSheetLink($node);
}
// We don't need duplicate css files
$this->links = array_unique($this->links);
return $this;
}
/**
* Import the dom
* @return SimpleXMLElement
*/
protected function importDom(DOMDocument $dom)
{
return $this->xml = simplexml_import_dom($dom);
}
/**
* Get all stylesheet tags
* @return array
*/
protected function getStyleSheetTags()
{
return $this->xml->xpath('//link[@rel="stylesheet"]');
}
/**
* Get the clean link to the stylesheet
* @param string $node
* @return string
*/
protected function getCleanStyleSheetLink($node)
{
// Get the link
$link = $node->attributes()->href;
return $link;
}
/**
* Get css from link
* @param string $link
* @return string|boolean
*/
protected function getCssFromLink($link)
{
return file_get_contents($link);
}
}
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