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<?php |
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|
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/** |
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* @file |
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* The rules for generating output in the serializer. |
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* |
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* These output rules are likely to generate output similar to the document that |
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* was parsed. It is not intended to output exactly the document that was parsed. |
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*/ |
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namespace WindPressDeps\Masterminds\HTML5\Serializer; |
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|
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use WindPressDeps\Masterminds\HTML5\Elements; |
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/** |
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* Generate the output html5 based on element rules. |
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*/ |
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class OutputRules implements RulesInterface |
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{ |
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const NAMESPACE_HTML = 'http://www.w3.org/1999/xhtml'; |
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const NAMESPACE_MATHML = 'http://www.w3.org/1998/Math/MathML'; |
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const NAMESPACE_SVG = 'http://www.w3.org/2000/svg'; |
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const NAMESPACE_XLINK = 'http://www.w3.org/1999/xlink'; |
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const NAMESPACE_XML = 'http://www.w3.org/XML/1998/namespace'; |
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const NAMESPACE_XMLNS = 'http://www.w3.org/2000/xmlns/'; |
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/** |
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* Holds the HTML5 element names that causes a namespace switch. |
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* |
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* @var array |
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*/ |
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protected $implicitNamespaces = array(self::NAMESPACE_HTML, self::NAMESPACE_SVG, self::NAMESPACE_MATHML, self::NAMESPACE_XML, self::NAMESPACE_XMLNS); |
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const IM_IN_HTML = 1; |
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const IM_IN_SVG = 2; |
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const IM_IN_MATHML = 3; |
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protected $traverser; |
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protected $encode = \false; |
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protected $out; |
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protected $outputMode; |
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private $xpath; |
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protected $nonBooleanAttributes = array( |
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/* |
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array( |
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'nodeNamespace'=>'http://www.w3.org/1999/xhtml', |
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'attrNamespace'=>'http://www.w3.org/1999/xhtml', |
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|
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'nodeName'=>'img', 'nodeName'=>array('img', 'a'), |
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'attrName'=>'alt', 'attrName'=>array('title', 'alt'), |
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), |
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*/ |
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array('nodeNamespace' => 'http://www.w3.org/1999/xhtml', 'attrName' => array('href', 'hreflang', 'http-equiv', 'icon', 'id', 'keytype', 'kind', 'label', 'lang', 'language', 'list', 'maxlength', 'media', 'method', 'name', 'placeholder', 'rel', 'rows', 'rowspan', 'sandbox', 'spellcheck', 'scope', 'seamless', 'shape', 'size', 'sizes', 'span', 'src', 'srcdoc', 'srclang', 'srcset', 'start', 'step', 'style', 'summary', 'tabindex', 'target', 'title', 'type', 'value', 'width', 'border', 'charset', 'cite', 'class', 'code', 'codebase', 'color', 'cols', 'colspan', 'content', 'coords', 'data', 'datetime', 'default', 'dir', 'dirname', 'enctype', 'for', 'form', 'formaction', 'headers', 'height', 'accept', 'accept-charset', 'accesskey', 'action', 'align', 'alt', 'bgcolor')), |
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array('nodeNamespace' => 'http://www.w3.org/1999/xhtml', 'xpath' => 'starts-with(local-name(), \'data-\')'), |
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); |
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const DOCTYPE = '<!DOCTYPE html>'; |
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public function __construct($output, $options = array()) |
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{ |
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if (isset($options['encode_entities'])) { |
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$this->encode = $options['encode_entities']; |
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} |
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$this->outputMode = static::IM_IN_HTML; |
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$this->out = $output; |
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} |
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public function addRule(array $rule) |
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{ |
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$this->nonBooleanAttributes[] = $rule; |
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} |
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public function setTraverser(Traverser $traverser) |
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{ |
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$this->traverser = $traverser; |
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return $this; |
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} |
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public function unsetTraverser() |
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{ |
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$this->traverser = null; |
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return $this; |
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} |
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public function document($dom) |
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{ |
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$this->doctype(); |
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if ($dom->documentElement) { |
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foreach ($dom->childNodes as $node) { |
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$this->traverser->node($node); |
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} |
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$this->nl(); |
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} |
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} |
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protected function doctype() |
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{ |
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$this->wr(static::DOCTYPE); |
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$this->nl(); |
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} |
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/** |
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* @param \DOMElement $ele |
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*/ |
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public function element($ele) |
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{ |
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$name = $ele->tagName; |
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// Per spec: |
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// If the element has a declared namespace in the HTML, MathML or |
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// SVG namespaces, we use the lname instead of the tagName. |
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if ($this->traverser->isLocalElement($ele)) { |
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$name = $ele->localName; |
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} |
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// If we are in SVG or MathML there is special handling. |
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// Using if/elseif instead of switch because it's faster in PHP. |
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if ('svg' == $name) { |
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$this->outputMode = static::IM_IN_SVG; |
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$name = Elements::normalizeSvgElement($name); |
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} elseif ('math' == $name) { |
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$this->outputMode = static::IM_IN_MATHML; |
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} |
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$this->openTag($ele); |
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// The tag is already self-closed (`<svg />` or `<math />`) in `openTag` if there are no child nodes. |
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$handledAsVoidTag = $this->outputMode !== static::IM_IN_HTML && !$ele->hasChildNodes(); |
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if (Elements::isA($name, Elements::TEXT_RAW)) { |
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foreach ($ele->childNodes as $child) { |
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if ($child instanceof \DOMCharacterData) { |
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$this->wr($child->data); |
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} elseif ($child instanceof \DOMElement) { |
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$this->element($child); |
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} |
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} |
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} else { |
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// Handle children. |
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if ($ele->hasChildNodes()) { |
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$this->traverser->children($ele->childNodes); |
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} |
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// Close out the SVG or MathML special handling. |
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if ('svg' == $name || 'math' == $name) { |
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$this->outputMode = static::IM_IN_HTML; |
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} |
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} |
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// If not unary, add a closing tag. |
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if (!$handledAsVoidTag && !Elements::isA($name, Elements::VOID_TAG)) { |
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$this->closeTag($ele); |
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} |
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} |
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/** |
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* Write a text node. |
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* |
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* @param \DOMText $ele The text node to write. |
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*/ |
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public function text($ele) |
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{ |
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if (isset($ele->parentNode) && isset($ele->parentNode->tagName) && Elements::isA($ele->parentNode->localName, Elements::TEXT_RAW)) { |
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$this->wr($ele->data); |
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return; |
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} |
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// FIXME: This probably needs some flags set. |
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$this->wr($this->enc($ele->data)); |
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} |
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public function cdata($ele) |
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{ |
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// This encodes CDATA. |
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$this->wr($ele->ownerDocument->saveXML($ele)); |
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} |
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public function comment($ele) |
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{ |
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// These produce identical output. |
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// $this->wr('<!--')->wr($ele->data)->wr('-->'); |
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$this->wr($ele->ownerDocument->saveXML($ele)); |
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} |
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public function processorInstruction($ele) |
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{ |
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$this->wr('<?')->wr($ele->target)->wr(' ')->wr($ele->data)->wr('?>'); |
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} |
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/** |
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* Write the namespace attributes. |
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* |
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* @param \DOMNode $ele The element being written. |
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*/ |
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protected function namespaceAttrs($ele) |
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{ |
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if (!$this->xpath || $this->xpath->document !== $ele->ownerDocument) { |
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$this->xpath = new \DOMXPath($ele->ownerDocument); |
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} |
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foreach ($this->xpath->query('namespace::*[not(.=../../namespace::*)]', $ele) as $nsNode) { |
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if (!in_array($nsNode->nodeValue, $this->implicitNamespaces)) { |
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$this->wr(' ')->wr($nsNode->nodeName)->wr('="')->wr($nsNode->nodeValue)->wr('"'); |
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} |
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} |
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} |
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/** |
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* Write the opening tag. |
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* |
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* Tags for HTML, MathML, and SVG are in the local name. Otherwise, use the |
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* qualified name (8.3). |
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* |
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* @param \DOMNode $ele The element being written. |
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*/ |
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protected function openTag($ele) |
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{ |
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$this->wr('<')->wr($this->traverser->isLocalElement($ele) ? $ele->localName : $ele->tagName); |
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$this->attrs($ele); |
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$this->namespaceAttrs($ele); |
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if ($this->outputMode == static::IM_IN_HTML) { |
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$this->wr('>'); |
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} else if ($ele->hasChildNodes()) { |
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$this->wr('>'); |
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} else { |
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$this->wr(' />'); |
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} |
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} |
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protected function attrs($ele) |
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{ |
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// FIXME: Needs support for xml, xmlns, xlink, and namespaced elements. |
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if (!$ele->hasAttributes()) { |
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return $this; |
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} |
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// TODO: Currently, this always writes name="value", and does not do |
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// value-less attributes. |
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$map = $ele->attributes; |
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$len = $map->length; |
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for ($i = 0; $i < $len; ++$i) { |
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$node = $map->item($i); |
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$val = $this->enc($node->value, \true); |
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// XXX: The spec says that we need to ensure that anything in |
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// the XML, XMLNS, or XLink NS's should use the canonical |
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// prefix. It seems that DOM does this for us already, but there |
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// may be exceptions. |
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$name = $node->nodeName; |
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// Special handling for attributes in SVG and MathML. |
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// Using if/elseif instead of switch because it's faster in PHP. |
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if ($this->outputMode == static::IM_IN_SVG) { |
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$name = Elements::normalizeSvgAttribute($name); |
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} elseif ($this->outputMode == static::IM_IN_MATHML) { |
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$name = Elements::normalizeMathMlAttribute($name); |
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} |
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$this->wr(' ')->wr($name); |
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if (isset($val) && '' !== $val || $this->nonBooleanAttribute($node)) { |
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$this->wr('="')->wr($val)->wr('"'); |
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} |
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} |
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} |
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protected function nonBooleanAttribute(\DOMAttr $attr) |
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{ |
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$ele = $attr->ownerElement; |
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foreach ($this->nonBooleanAttributes as $rule) { |
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if (isset($rule['nodeNamespace']) && $rule['nodeNamespace'] !== $ele->namespaceURI) { |
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continue; |
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} |
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if (isset($rule['attNamespace']) && $rule['attNamespace'] !== $attr->namespaceURI) { |
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continue; |
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} |
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if (isset($rule['nodeName']) && !is_array($rule['nodeName']) && $rule['nodeName'] !== $ele->localName) { |
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continue; |
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} |
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if (isset($rule['nodeName']) && is_array($rule['nodeName']) && !in_array($ele->localName, $rule['nodeName'], \true)) { |
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continue; |
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} |
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if (isset($rule['attrName']) && !is_array($rule['attrName']) && $rule['attrName'] !== $attr->localName) { |
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continue; |
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} |
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if (isset($rule['attrName']) && is_array($rule['attrName']) && !in_array($attr->localName, $rule['attrName'], \true)) { |
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continue; |
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} |
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if (isset($rule['xpath'])) { |
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$xp = $this->getXPath($attr); |
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if (isset($rule['prefixes'])) { |
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foreach ($rule['prefixes'] as $nsPrefix => $ns) { |
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$xp->registerNamespace($nsPrefix, $ns); |
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} |
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} |
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if (!$xp->evaluate($rule['xpath'], $attr)) { |
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continue; |
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} |
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} |
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return \true; |
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} |
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return \false; |
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} |
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private function getXPath(\DOMNode $node) |
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{ |
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if (!$this->xpath) { |
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$this->xpath = new \DOMXPath($node->ownerDocument); |
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} |
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return $this->xpath; |
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} |
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/** |
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* Write the closing tag. |
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* |
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* Tags for HTML, MathML, and SVG are in the local name. Otherwise, use the |
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* qualified name (8.3). |
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* |
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* @param \DOMNode $ele The element being written. |
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*/ |
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protected function closeTag($ele) |
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{ |
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if ($this->outputMode == static::IM_IN_HTML || $ele->hasChildNodes()) { |
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$this->wr('</')->wr($this->traverser->isLocalElement($ele) ? $ele->localName : $ele->tagName)->wr('>'); |
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} |
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} |
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/** |
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* Write to the output. |
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* |
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* @param string $text The string to put into the output |
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* |
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* @return $this |
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*/ |
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protected function wr($text) |
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{ |
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fwrite($this->out, (string) $text); |
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return $this; |
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} |
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/** |
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* Write a new line character. |
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* |
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* @return $this |
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*/ |
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protected function nl() |
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{ |
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fwrite($this->out, \PHP_EOL); |
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return $this; |
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} |
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/** |
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* Encode text. |
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* |
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* When encode is set to false, the default value, the text passed in is |
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* escaped per section 8.3 of the html5 spec. For details on how text is |
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* escaped see the escape() method. |
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* |
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* When encoding is set to true the text is converted to named character |
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* references where appropriate. Section 8.1.4 Character references of the |
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* html5 spec refers to using named character references. This is useful for |
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* characters that can't otherwise legally be used in the text. |
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* |
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* The named character references are listed in section 8.5. |
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* |
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* @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. |
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* This includes such characters as +.# and many other common ones. By default |
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* encoding here will just escape &'<>". |
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* |
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* @param string $text Text to encode. |
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* @param bool $attribute True if we are encoding an attribute, false otherwise. |
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* |
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* @return string The encoded text. |
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*/ |
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protected function enc($text, $attribute = \false) |
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{ |
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// Escape the text rather than convert to named character references. |
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if (!$this->encode) { |
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return $this->escape($text, $attribute); |
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} |
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return htmlentities($text, \ENT_HTML5 | \ENT_SUBSTITUTE | \ENT_QUOTES, 'UTF-8', \false); |
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} |
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/** |
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* Escape test. |
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* |
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* According to the html5 spec section 8.3 Serializing HTML fragments, text |
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* within tags that are not style, script, xmp, iframe, noembed, and noframes |
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* need to be properly escaped. |
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* |
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* The & should be converted to &, no breaking space unicode characters |
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* converted to , when in attribute mode the " should be converted to |
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* ", and when not in attribute mode the < and > should be converted to |
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* < and >. |
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* |
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* @see http://www.w3.org/TR/2013/CR-html5-20130806/syntax.html#escapingString |
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* |
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* @param string $text Text to escape. |
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* @param bool $attribute True if we are escaping an attrubute, false otherwise. |
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*/ |
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protected function escape($text, $attribute = \false) |
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{ |
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// Not using htmlspecialchars because, while it does escaping, it doesn't |
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// match the requirements of section 8.5. For example, it doesn't handle |
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// non-breaking spaces. |
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if ($attribute) { |
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$replace = array('"' => '"', '&' => '&', " " => ' '); |
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} else { |
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$replace = array('<' => '<', '>' => '>', '&' => '&', " " => ' '); |
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} |
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return strtr($text, $replace); |
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} |
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} |
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|
