/**
* This test functions shows an example of SmartDOMDocument in action.
* A sample HTML fragment is loaded.
* Then, the first image in the document is cut out and saved separately.
* It also shows that Russian characters are parsed correctly.
*
*/
public static function testHTML()
{
$content = <<<CONTENT
<div class='class1'>
<img src='http://www.google.com/favicon.ico' />
Some Text
<p>русский</p>
</div>
CONTENT;
print "Before removing the image, the content is: \n" . htmlspecialchars($content) . "<br>\n";
$content_doc = new SmartDOMDocument();
$content_doc->loadHTML($content);
try {
$first_image = $content_doc->getElementsByTagName("img")->item(0);
if ($first_image) {
$first_image->parentNode->removeChild($first_image);
$content = $content_doc->saveHTMLExact();
$image_doc = new SmartDOMDocument();
$image_doc->appendChild($image_doc->importNode($first_image, true));
$image = $image_doc->saveHTMLExact();
}
} catch (Exception $e) {
}
print "After removing the image, the content is: \n" . htmlspecialchars($content) . "<br>\n";
print "The image is: \n" . htmlspecialchars($image);
}
/**
* Get's the content that's about to be output
* and fixes the images to follow the responsive.io service conventions.
* @param string $content the unmodified html
* @return string the modified html
*/
public function update_images($content)
{
require_once plugin_dir_path(__FILE__) . 'includes/SmartDOMDocument.class.php';
// Create a DOMDocument instance
$dom = new SmartDOMDocument();
$dom->formatOutput = true;
$dom->preserveWhiteSpace = false;
if (empty($content)) {
return;
}
// Loads our content as HTML
@$dom->loadHTML($content);
// Get all of our img tags
$images = $dom->getElementsByTagName('img');
// Loop through all the images in this content
foreach ($images as $image) {
// Get some attributes
$src = $image->getAttribute('src');
$ext = strtolower(pathinfo($src, PATHINFO_EXTENSION));
$alt = $image->getAttribute('alt');
// Only interested in those who have a src set
// and that are not gifs
if (empty($src) || strpos($ext, 'gif') !== false) {
continue;
}
// Create our fallback image before changing this node
$imageClone = $image->cloneNode();
// Add the src as a data-src attribute instead
$image->setAttribute('data-src', $src);
// Empty the src of this img
$image->setAttribute('src', '');
// Now prepare our <noscript> markup
$noscript = $dom->createElement("noscript");
// Insert it
$noscriptNode = $image->parentNode->insertBefore($noscript, $image);
// Append the image fallback
$noscriptNode->appendChild($imageClone);
}
// Return our modified content
$html = $dom->saveHTMLExact();
return $html;
}
public function twentytwenty_shortcode($atts, $content = null)
{
wp_enqueue_script('jquery');
wp_enqueue_script('twentytwenty-jquery-event-move');
wp_enqueue_script('twentytwenty-twentytwenty');
wp_enqueue_script('twentytwenty-plugin-script');
wp_enqueue_style('twentytwenty-twentytwenty');
require_once plugin_dir_path(__FILE__) . 'includes/smart-dom-document.php';
$doc = new SmartDOMDocument();
$doc->LoadHTML($content);
$images = $doc->getElementsByTagName('img');
$images_code = '';
$width = '';
$height = '';
foreach ($images as $image) {
if ($width == '') {
$width = $image->getAttribute("width");
}
if ($height == '') {
$height = $image->getAttribute("height");
}
$images_code = $images_code . '<img src="' . $image->getAttribute("src") . '"/>';
}
if ($width != '') {
$width = $width . 'px';
}
if ($height != '') {
$height = $height . 'px';
}
return '<div class="twentytwenty" class="twentytwenty-container" style="display: none; max-width: 100%; width: ' . $width . '; height: ' . $height . '">' . $images_code . '</div>';
}
function html_beautifier($html)
{
if (!class_exists('SmartDOMDocument')) {
require_once $this->plugin_path . 'vendors/SmartDOMDocument.class.php';
}
$x = new SmartDOMDocument();
$x->loadHTML($html);
$clean = $x->saveHTMLExact();
return $clean;
}
