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<?php
namespace HTML5\Serializer;
use \HTML5\Elements;
class OutputRules {
protected $traverser;
protected $encode = FALSE;
protected $out;
const DOCTYPE = '<!DOCTYPE html>';
public function __construct($traverser, $output, $options = array()) {
$this->traverser = $traverser;
if (isset($options['encode'])) {
$this->encode = $options['encode'];
}
$this->out = $output;
}
public function document($dom) {
$this->doctype();
$this->traverser->node($dom->documentElement);
$this->nl();
}
protected function doctype() {
$this->wr(self::DOCTYPE);
$this->nl();
}
public function element($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;
}
$this->openTag($ele);
// Handle children.
if ($ele->hasChildNodes()) {
$this->traverser->children($ele->childNodes);
}
// If not unary, add a closing tag.
if (!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($ele->parentNode) && Elements::isA($ele->parentNode->tagName, 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) {
$this->wr('<![CDATA[')->wr($ele->data)->wr(']]>');
}
public function comment($ele) {
$this->wr('<!--')->wr($ele->data)->wr('-->');
}
public function processorInstruction($ele) {
$this->wr('<?')->wr($ele->target)->wr(' ')->wr($ele->data)->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) {
// FIXME: Needs support for SVG, MathML, and namespaced XML.
$this->wr('<')->wr($ele->tagName);
$this->attrs($ele);
$this->wr('>');
}
protected function attrs($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);
// 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.
$this->wr(' ')->wr($node->name)->wr('="')->wr($val)->wr('"');
}
}
/**
* 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) {
// FIXME: Needs support for SVG, MathML, and namespaced XML.
$this->wr('</')->wr($ele->tagName)->wr('>');
}
/**
* Write to the output.
*
* @param string $text
* The string to put into the output.
*
* @return HTML5\Serializer\Traverser
* $this so it can be used in chaining.
*/
protected function wr($text) {
fwrite($this->out, $text);
return $this;
}
/**
* Write a new line character.
*
* @return HTML5\Serializer\Traverser
* $this so it can be used in chaining.
*/
protected function nl() {
fwrite($this->out, PHP_EOL);
return $this;
}
/**
* Encode text.
*
* 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 $text
* text to encode.
*
* @return string
* The encoded text.
*/
protected function enc($text) {
$flags = ENT_QUOTES;
// Escape rather than encode all entities.
if (!$this->encode) {
return htmlspecialchars($text, $flags, 'UTF-8');
}
// If we are in PHP 5.4+ we can use the native html5 entity functionality.
if (defined('ENT_HTML5')) {
$flags = ENT_HTML5 | ENT_SUBSTITUTE | ENT_QUOTES;
$ret = htmlentities($text, $flags, 'UTF-8', FALSE);
}
// If a version earlier than 5.4 html5 entities are not entirely handled.
// This manually handles them.
else {
$ret = strtr($text, \HTML5\Serializer\HTML5Entities::$map);
}
return $ret;
}
}
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