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<?php
/**
* A simple serializer that walks the DOM tree and outputs HTML5.
*/
namespace HTML5\Serializer;
/**
* Transform a DOM into an HTML5 document.
*
* This provides a serializer that roughly follows the save and load API
* in the native PHP DOM implementation.
*
* For reference, see DOMDocument::save, DOMDocument::saveXML,
* DOMDocument::saveHTML and DOMDocument::saveHTMLFile.
*/
class Serializer {
protected $dom;
protected $pretty = TRUE;
/**
* Create a serializer.
*
* This takes a DOM-like data structure. It SHOULD treat the
* DOMNode as an interface, but this does not do type checking.
*
* @param DOMNode $dom
* A DOMNode-like object. Typically, a DOMDocument should be passed.
* @param boolean $format
* If true, this will format the output (e.g. add indentation). If FALSE, then
* little or no formatting will be done.
*/
public function __construct($dom, $format = TRUE) {
$this->dom = $dom;
$this->pretty = $format;
}
/**
* Save to a file.
*
* @param mixed $filename
* A file handle resource or the
* full name to the file. This will overwrite the contents of
* any file that it finds.
*/
public function save($filename) {
$close = TRUE;
if (is_resource($filename)) {
$file = $filename;
$close = FALSE;
}
else {
$file = fopen($filename, 'w');
}
$trav = new Traverser($this->dom, $file);
$trav->formatOutput($this->pretty);
$trav->walk();
if ($close) {
fclose($file);
}
}
/**
* Return the DOM as an HTML5 string.
*/
public function saveHTML() {
// We buffer into a temp-file backed memory map. This may or may not be
// faster than writing directly to a string, but it makes the interface
// consistant and will keep memory consumption lower (2MB max for the file
// buffer).
$stream = fopen('php://temp', 'w');
$this->save($stream);
return stream_get_contents($stream, -1, 0);
}
}
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