'http://www.w3.org/1999/xhtml',
'attrNamespace'=>'http://www.w3.org/1999/xhtml',
'nodeName'=>'img', 'nodeName'=>array('img', 'a'),
'attrName'=>'alt', 'attrName'=>array('title', 'alt'),
),
*/
array('nodeNamespace' => 'http://www.w3.org/1999/xhtml', 'attrName' => array('href', 'hreflang', 'http-equiv', 'icon', 'id', 'keytype', 'kind', 'label', 'lang', 'language', 'list', 'maxlength', 'media', 'method', 'name', 'placeholder', 'rel', 'rows', 'rowspan', 'sandbox', 'spellcheck', 'scope', 'seamless', 'shape', 'size', 'sizes', 'span', 'src', 'srcdoc', 'srclang', 'srcset', 'start', 'step', 'style', 'summary', 'tabindex', 'target', 'title', 'type', 'value', 'width', 'border', 'charset', 'cite', 'class', 'code', 'codebase', 'color', 'cols', 'colspan', 'content', 'coords', 'data', 'datetime', 'default', 'dir', 'dirname', 'enctype', 'for', 'form', 'formaction', 'headers', 'height', 'accept', 'accept-charset', 'accesskey', 'action', 'align', 'alt', 'bgcolor')),
array('nodeNamespace' => 'http://www.w3.org/1999/xhtml', 'xpath' => 'starts-with(local-name(), \'data-\')'),
);
const DOCTYPE = '';
public function __construct($output, $options = array())
{
if (isset($options['encode_entities'])) {
$this->encode = $options['encode_entities'];
}
$this->outputMode = static::IM_IN_HTML;
$this->out = $output;
$this->hasHTML5 = defined('ENT_HTML5');
}
public function addRule(array $rule)
{
$this->nonBooleanAttributes[] = $rule;
}
public function setTraverser(Traverser $traverser)
{
$this->traverser = $traverser;
return $this;
}
public function unsetTraverser()
{
$this->traverser = null;
return $this;
}
public function document($dom)
{
$this->doctype();
if ($dom->documentElement) {
foreach ($dom->childNodes as $node) {
$this->traverser->node($node);
}
$this->nl();
}
}
protected function doctype()
{
$this->wr(static::DOCTYPE);
$this->nl();
}
/**
* @param \DOMElement $ele
*/
public function element($ele)
{
$name = $ele->tagName;
// Per spec:
// If the element has a declared namespace in the HTML, MathML or
// SVG namespaces, we use the lname instead of the tagName.
if ($this->traverser->isLocalElement($ele)) {
$name = $ele->localName;
}
// If we are in SVG or MathML there is special handling.
// Using if/elseif instead of switch because it's faster in PHP.
if ('svg' == $name) {
$this->outputMode = static::IM_IN_SVG;
$name = Elements::normalizeSvgElement($name);
} elseif ('math' == $name) {
$this->outputMode = static::IM_IN_MATHML;
}
$this->openTag($ele);
// The tag is already self-closed (`` or ``) in `openTag` if there are no child nodes.
$handledAsVoidTag = $this->outputMode !== static::IM_IN_HTML && !$ele->hasChildNodes();
if (Elements::isA($name, Elements::TEXT_RAW)) {
foreach ($ele->childNodes as $child) {
if ($child instanceof \DOMCharacterData) {
$this->wr($child->data);
} elseif ($child instanceof \DOMElement) {
$this->element($child);
}
}
} else {
// Handle children.
if ($ele->hasChildNodes()) {
$this->traverser->children($ele->childNodes);
}
// Close out the SVG or MathML special handling.
if ('svg' == $name || 'math' == $name) {
$this->outputMode = static::IM_IN_HTML;
}
}
// If not unary, add a closing tag.
if (!$handledAsVoidTag && !Elements::isA($name, Elements::VOID_TAG)) {
$this->closeTag($ele);
}
}
/**
* Write a text node.
*
* @param \DOMText $ele The text node to write.
*/
public function text($ele)
{
if (isset($ele->parentNode) && isset($ele->parentNode->tagName) && Elements::isA($ele->parentNode->localName, Elements::TEXT_RAW)) {
$this->wr($ele->data);
return;
}
// FIXME: This probably needs some flags set.
$this->wr($this->enc($ele->data));
}
public function cdata($ele)
{
// This encodes CDATA.
$this->wr($ele->ownerDocument->saveXML($ele));
}
public function comment($ele)
{
// These produce identical output.
// $this->wr('');
$this->wr($ele->ownerDocument->saveXML($ele));
}
public function processorInstruction($ele)
{
$this->wr('wr($ele->target)->wr(' ')->wr($ele->data)->wr('?>');
}
/**
* Write the namespace attributes.
*
* @param \DOMNode $ele The element being written.
*/
protected function namespaceAttrs($ele)
{
if (!$this->xpath || $this->xpath->document !== $ele->ownerDocument) {
$this->xpath = new \DOMXPath($ele->ownerDocument);
}
foreach ($this->xpath->query('namespace::*[not(.=../../namespace::*)]', $ele) as $nsNode) {
if (!in_array($nsNode->nodeValue, $this->implicitNamespaces)) {
$this->wr(' ')->wr($nsNode->nodeName)->wr('="')->wr($nsNode->nodeValue)->wr('"');
}
}
}
/**
* Write the opening tag.
*
* Tags for HTML, MathML, and SVG are in the local name. Otherwise, use the
* qualified name (8.3).
*
* @param \DOMNode $ele The element being written.
*/
protected function openTag($ele)
{
$this->wr('<')->wr($this->traverser->isLocalElement($ele) ? $ele->localName : $ele->tagName);
$this->attrs($ele);
$this->namespaceAttrs($ele);
if ($this->outputMode == static::IM_IN_HTML) {
$this->wr('>');
} else if ($ele->hasChildNodes()) {
$this->wr('>');
} else {
$this->wr(' />');
}
}
protected function attrs($ele)
{
// FIXME: Needs support for xml, xmlns, xlink, and namespaced elements.
if (!$ele->hasAttributes()) {
return $this;
}
// TODO: Currently, this always writes name="value", and does not do
// value-less attributes.
$map = $ele->attributes;
$len = $map->length;
for ($i = 0; $i < $len; ++$i) {
$node = $map->item($i);
$val = $this->enc($node->value, \true);
// XXX: The spec says that we need to ensure that anything in
// the XML, XMLNS, or XLink NS's should use the canonical
// prefix. It seems that DOM does this for us already, but there
// may be exceptions.
$name = $node->nodeName;
// Special handling for attributes in SVG and MathML.
// Using if/elseif instead of switch because it's faster in PHP.
if ($this->outputMode == static::IM_IN_SVG) {
$name = Elements::normalizeSvgAttribute($name);
} elseif ($this->outputMode == static::IM_IN_MATHML) {
$name = Elements::normalizeMathMlAttribute($name);
}
$this->wr(' ')->wr($name);
if (isset($val) && '' !== $val || $this->nonBooleanAttribute($node)) {
$this->wr('="')->wr($val)->wr('"');
}
}
}
protected function nonBooleanAttribute(\DOMAttr $attr)
{
$ele = $attr->ownerElement;
foreach ($this->nonBooleanAttributes as $rule) {
if (isset($rule['nodeNamespace']) && $rule['nodeNamespace'] !== $ele->namespaceURI) {
continue;
}
if (isset($rule['attNamespace']) && $rule['attNamespace'] !== $attr->namespaceURI) {
continue;
}
if (isset($rule['nodeName']) && !is_array($rule['nodeName']) && $rule['nodeName'] !== $ele->localName) {
continue;
}
if (isset($rule['nodeName']) && is_array($rule['nodeName']) && !in_array($ele->localName, $rule['nodeName'], \true)) {
continue;
}
if (isset($rule['attrName']) && !is_array($rule['attrName']) && $rule['attrName'] !== $attr->localName) {
continue;
}
if (isset($rule['attrName']) && is_array($rule['attrName']) && !in_array($attr->localName, $rule['attrName'], \true)) {
continue;
}
if (isset($rule['xpath'])) {
$xp = $this->getXPath($attr);
if (isset($rule['prefixes'])) {
foreach ($rule['prefixes'] as $nsPrefix => $ns) {
$xp->registerNamespace($nsPrefix, $ns);
}
}
if (!$xp->evaluate($rule['xpath'], $attr)) {
continue;
}
}
return \true;
}
return \false;
}
private function getXPath(\DOMNode $node)
{
if (!$this->xpath) {
$this->xpath = new \DOMXPath($node->ownerDocument);
}
return $this->xpath;
}
/**
* Write the closing tag.
*
* Tags for HTML, MathML, and SVG are in the local name. Otherwise, use the
* qualified name (8.3).
*
* @param \DOMNode $ele The element being written.
*/
protected function closeTag($ele)
{
if ($this->outputMode == static::IM_IN_HTML || $ele->hasChildNodes()) {
$this->wr('wr($this->traverser->isLocalElement($ele) ? $ele->localName : $ele->tagName)->wr('>');
}
}
/**
* Write to the output.
*
* @param string $text The string to put into the output
*
* @return $this
*/
protected function wr($text)
{
fwrite($this->out, $text);
return $this;
}
/**
* Write a new line character.
*
* @return $this
*/
protected function nl()
{
fwrite($this->out, \PHP_EOL);
return $this;
}
/**
* Encode text.
*
* When encode is set to false, the default value, the text passed in is
* escaped per section 8.3 of the html5 spec. For details on how text is
* escaped see the escape() method.
*
* When encoding is set to true the text is converted to named character
* references where appropriate. Section 8.1.4 Character references of the
* html5 spec refers to using named character references. This is useful for
* characters that can't otherwise legally be used in the text.
*
* The named character references are listed in section 8.5.
*
* @see http://www.w3.org/TR/2013/CR-html5-20130806/syntax.html#named-character-references True encoding will turn all named character references into their entities.
* This includes such characters as +.# and many other common ones. By default
* encoding here will just escape &'<>".
*
* Note, PHP 5.4+ has better html5 encoding.
*
* @todo Use the Entities class in php 5.3 to have html5 entities.
*
* @param string $text Text to encode.
* @param bool $attribute True if we are encoding an attrubute, false otherwise.
*
* @return string The encoded text.
*/
protected function enc($text, $attribute = \false)
{
// Escape the text rather than convert to named character references.
if (!$this->encode) {
return $this->escape($text, $attribute);
}
// If we are in PHP 5.4+ we can use the native html5 entity functionality to
// convert the named character references.
if ($this->hasHTML5) {
return htmlentities($text, \ENT_HTML5 | \ENT_SUBSTITUTE | \ENT_QUOTES, 'UTF-8', \false);
} else {
return strtr($text, HTML5Entities::$map);
}
}
/**
* Escape test.
*
* According to the html5 spec section 8.3 Serializing HTML fragments, text
* within tags that are not style, script, xmp, iframe, noembed, and noframes
* need to be properly escaped.
*
* The & should be converted to &, no breaking space unicode characters
* converted to , when in attribute mode the " should be converted to
* ", and when not in attribute mode the < and > should be converted to
* < and >.
*
* @see http://www.w3.org/TR/2013/CR-html5-20130806/syntax.html#escapingString
*
* @param string $text Text to escape.
* @param bool $attribute True if we are escaping an attrubute, false otherwise.
*/
protected function escape($text, $attribute = \false)
{
// Not using htmlspecialchars because, while it does escaping, it doesn't
// match the requirements of section 8.5. For example, it doesn't handle
// non-breaking spaces.
if ($attribute) {
$replace = array('"' => '"', '&' => '&', " " => ' ');
} else {
$replace = array('<' => '<', '>' => '>', '&' => '&', " " => ' ');
}
return strtr($text, $replace);
}
}