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143 lines
4.3 KiB
143 lines
4.3 KiB
<?php |
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namespace Readability; |
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/** |
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* JavaScript-like HTML DOM Element. |
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* |
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* This class extends PHP's DOMElement to allow |
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* users to get and set the innerHTML property of |
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* HTML elements in the same way it's done in |
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* JavaScript. |
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* |
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* Example usage: |
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* require_once 'JSLikeHTMLElement.php'; |
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* header('Content-Type: text/plain'); |
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* $doc = new DOMDocument(); |
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* $doc->registerNodeClass('DOMElement', 'JSLikeHTMLElement'); |
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* $doc->loadHTML('<div><p>Para 1</p><p>Para 2</p></div>'); |
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* $elem = $doc->getElementsByTagName('div')->item(0); |
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* |
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* // print innerHTML |
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* echo $elem->innerHTML; // prints '<p>Para 1</p><p>Para 2</p>' |
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* echo "\n\n"; |
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* |
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* // set innerHTML |
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* $elem->innerHTML = '<a href="http://fivefilters.org">FiveFilters.org</a>'; |
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* echo $elem->innerHTML; // prints '<a href="http://fivefilters.org">FiveFilters.org</a>' |
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* echo "\n\n"; |
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* |
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* // print document (with our changes) |
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* echo $doc->saveXML(); |
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* |
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* @author Keyvan Minoukadeh - http://www.keyvan.net - keyvan@keyvan.net |
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* |
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* @see http://fivefilters.org (the project this was written for) |
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*/ |
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class JSLikeHTMLElement extends \DOMElement |
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{ |
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/** |
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* Used for setting innerHTML like it's done in JavaScript:. |
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* |
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* ```php |
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* $div->innerHTML = '<h2>Chapter 2</h2><p>The story begins...</p>'; |
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* ``` |
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*/ |
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public function __set($name, $value) |
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{ |
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if ('innerHTML' !== $name) { |
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$trace = debug_backtrace(); |
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trigger_error('Undefined property via __set(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'], \E_USER_NOTICE); |
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return; |
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} |
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// first, empty the element |
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if (isset($this->childNodes)) { |
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for ($x = $this->childNodes->length - 1; $x >= 0; --$x) { |
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$this->removeChild($this->childNodes->item($x)); |
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} |
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} |
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// $value holds our new inner HTML |
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$value = trim($value); |
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if (empty($value)) { |
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return; |
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} |
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// ensure bad entity won't generate warning |
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$previousError = libxml_use_internal_errors(true); |
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$f = $this->ownerDocument->createDocumentFragment(); |
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// appendXML() expects well-formed markup (XHTML) |
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$result = $f->appendXML($value); |
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if ($result) { |
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if ($f->hasChildNodes()) { |
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$this->appendChild($f); |
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} |
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} else { |
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// $value is probably ill-formed |
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$f = new \DOMDocument(); |
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// Using <htmlfragment> will generate a warning, but so will bad HTML |
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// (and by this point, bad HTML is what we've got). |
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// We use it (and suppress the warning) because an HTML fragment will |
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// be wrapped around <html><body> tags which we don't really want to keep. |
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// Note: despite the warning, if loadHTML succeeds it will return true. |
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$result = $f->loadHTML('<meta charset="utf-8"><htmlfragment>' . $value . '</htmlfragment>'); |
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if ($result) { |
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$import = $f->getElementsByTagName('htmlfragment')->item(0); |
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foreach ($import->childNodes as $child) { |
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$importedNode = $this->ownerDocument->importNode($child, true); |
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$this->appendChild($importedNode); |
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} |
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} |
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} |
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libxml_clear_errors(); |
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libxml_use_internal_errors($previousError); |
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} |
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/** |
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* Used for getting innerHTML like it's done in JavaScript:. |
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* |
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* ```php |
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* $string = $div->innerHTML; |
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* ``` |
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*/ |
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public function __get($name) |
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{ |
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if ('innerHTML' === $name) { |
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$inner = ''; |
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if (isset($this->childNodes)) { |
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foreach ($this->childNodes as $child) { |
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$inner .= $this->ownerDocument->saveXML($child); |
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} |
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} |
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return $inner; |
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} |
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$trace = debug_backtrace(); |
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trigger_error('Undefined property via __get(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'], \E_USER_NOTICE); |
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} |
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public function __toString() |
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{ |
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return '[' . $this->tagName . ']'; |
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} |
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public function getInnerHtml() |
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{ |
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return $this->__get('innerHTML'); |
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} |
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public function setInnerHtml($value) |
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{ |
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return $this->__set('innerHTML', $value); |
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} |
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}
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