full-text-rss/libraries/html5php/HTML5/Serializer/OutputRules.php

<?php
/**
 * @file
 * The rules for generating output in the serializer.
 *
 * These output rules are likely to generate output similar to the document that
 * was parsed. It is not intended to output exactly the document that was parsed.
 */
namespace Masterminds\HTML5\Serializer;

use Masterminds\HTML5\Elements;

/**
 * Generate the output html5 based on element rules.
 */
class OutputRules implements \Masterminds\HTML5\Serializer\RulesInterface
{
    /**
     * Defined in http://www.w3.org/TR/html51/infrastructure.html#html-namespace-0
     */
    const NAMESPACE_HTML = 'http://www.w3.org/1999/xhtml';

    const NAMESPACE_MATHML = 'http://www.w3.org/1998/Math/MathML';

    const NAMESPACE_SVG = 'http://www.w3.org/2000/svg';

    const NAMESPACE_XLINK = 'http://www.w3.org/1999/xlink';

    const NAMESPACE_XML = 'http://www.w3.org/XML/1998/namespace';

    const NAMESPACE_XMLNS = 'http://www.w3.org/2000/xmlns/';

    /**
     * Holds the HTML5 element names that causes a namespace switch
     *
     * @var array
     */
    protected $implicitNamespaces = array(
        self::NAMESPACE_HTML,
        self::NAMESPACE_SVG,
        self::NAMESPACE_MATHML,
        self::NAMESPACE_XML,
        self::NAMESPACE_XMLNS,
    );

    const IM_IN_HTML = 1;

    const IM_IN_SVG = 2;

    const IM_IN_MATHML = 3;

    /**
     * Used as cache to detect if is available ENT_HTML5
     * @var boolean
     */
    private $hasHTML5 = false;

    protected $traverser;

    protected $encode = false;

    protected $out;

    protected $outputMode;

    private $xpath;

    protected $nonBooleanAttributes = array(
        /*
        array(
            'nodeNamespace'=>'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'),


            'prefixes'=>['xh'=>'http://www.w3.org/1999/xhtml'),
            'xpath' => "@checked[../../xh:input[@type='radio' or @type='checkbox']]",
        ),
        */
        array(
            'nodeNamespace'=>'http://www.w3.org/1999/xhtml',
            'attrName'=>array('alt', 'title'),
        ),

    );

    const DOCTYPE = '<!DOCTYPE html>';

    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;

        // If HHVM, see https://github.com/facebook/hhvm/issues/2727
        $this->hasHTML5 = defined('ENT_HTML5') && !defined('HHVM_VERSION');
    }
    public function addRule(array $rule)
    {
        $this->nonBooleanAttributes[] = $rule;
    }

    public function setTraverser(\Masterminds\HTML5\Serializer\Traverser $traverser)
    {
        $this->traverser = $traverser;

        return $this;
    }

    public function document($dom)
    {
        $this->doctype();
        $this->traverser->node($dom->documentElement);
        $this->nl();
    }

    protected function doctype()
    {
        $this->wr(static::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;
        }

        // If we are in SVG or MathML there is special handling.
        // Using if/elseif instead of switch because it's faster in PHP.
        if ($name == 'svg') {
            $this->outputMode = static::IM_IN_SVG;
            $name = Elements::normalizeSvgElement($name);
        } elseif ($name == 'math') {
            $this->outputMode = static::IM_IN_MATHML;
        }

        $this->openTag($ele);
        if (Elements::isA($name, Elements::TEXT_RAW)) {
            foreach ($ele->childNodes as $child) {
                $this->wr($child->data);
            }
        } else {
            // Handle children.
            if ($ele->hasChildNodes()) {
                $this->traverser->children($ele->childNodes);
            }

            // Close out the SVG or MathML special handling.
            if ($name == 'svg' || $name == 'math') {
                $this->outputMode = static::IM_IN_HTML;
            }
        }

        // 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($ele->parentNode) && isset($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.
        // $this->wr('<!--')->wr($ele->data)->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) {
            $this->wr('>');
        }         // If we are not in html mode we are in SVG, MathML, or XML embedded content.
        else {
            if ($ele->hasChildNodes()) {
                $this->wr('>');
            }             // If there are no children this is self closing.
            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->name;

            // 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->query($rule['xpath'], $attr->ownerElement)->length){
                    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 \Masterminds\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 \Masterminds\HTML5\Serializer\Traverser $this so it can be used in chaining.
     */
    protected function nl()
    {
        fwrite($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 boolean $attribute
     *            True if we are encoding an attrubute, false otherwise
     *
     * @return string The encoded text.
     */
    protected function enc($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);
        }         // If a version earlier than 5.4 html5 entities are not entirely handled.
        // This manually handles them.
        else {
            return strtr($text, \Masterminds\HTML5\Serializer\HTML5Entities::$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 &amp;, no breaking space unicode characters
     * converted to &nbsp;, when in attribute mode the " should be converted to
     * &quot;, and when not in attribute mode the < and > should be converted to
     * &lt; and &gt;.
     *
     * @see http://www.w3.org/TR/2013/CR-html5-20130806/syntax.html#escapingString
     *
     * @param string $text
     *            text to escape.
     * @param boolean $attribute
     *            True if we are escaping an attrubute, false otherwise
     */
    protected function escape($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(
                '"' => '&quot;',
                '&' => '&amp;',
                "\xc2\xa0" => '&nbsp;'
            );
        } else {
            $replace = array(
                '<' => '&lt;',
                '>' => '&gt;',
                '&' => '&amp;',
                "\xc2\xa0" => '&nbsp;'
            );
        }

        return strtr($text, $replace);
    }
}
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`<?php`
			`/**`
			`* @file`
			`* The rules for generating output in the serializer.`
			`*`
			`* These output rules are likely to generate output similar to the document that`
			`* was parsed. It is not intended to output exactly the document that was parsed.`
			`*/`
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`namespace Masterminds\HTML5\Serializer;`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`use Masterminds\HTML5\Elements;`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
			`/**`
			`* Generate the output html5 based on element rules.`
			`*/`
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`class OutputRules implements \Masterminds\HTML5\Serializer\RulesInterface`
			`{`
			`/**`
			`* Defined in http://www.w3.org/TR/html51/infrastructure.html#html-namespace-0`
			`*/`
			`const NAMESPACE_HTML = 'http://www.w3.org/1999/xhtml';`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`const NAMESPACE_MATHML = 'http://www.w3.org/1998/Math/MathML';`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`const NAMESPACE_SVG = 'http://www.w3.org/2000/svg';`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`const NAMESPACE_XLINK = 'http://www.w3.org/1999/xlink';`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`const NAMESPACE_XML = 'http://www.w3.org/XML/1998/namespace';`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`const NAMESPACE_XMLNS = 'http://www.w3.org/2000/xmlns/';`

			`/**`
			`* Holds the HTML5 element names that causes a namespace switch`
			`*`
			`* @var array`
			`*/`
			`protected $implicitNamespaces = array(`
			`self::NAMESPACE_HTML,`
			`self::NAMESPACE_SVG,`
			`self::NAMESPACE_MATHML,`
			`self::NAMESPACE_XML,`
			`self::NAMESPACE_XMLNS,`
			`);`

			`const IM_IN_HTML = 1;`

			`const IM_IN_SVG = 2;`

			`const IM_IN_MATHML = 3;`

			`/**`
			`* Used as cache to detect if is available ENT_HTML5`
			`* @var boolean`
			`*/`
			`private $hasHTML5 = false;`

			`protected $traverser;`

			`protected $encode = false;`

			`protected $out;`

			`protected $outputMode;`

			`private $xpath;`

			`protected $nonBooleanAttributes = array(`
			`/*`
			`array(`
			`'nodeNamespace'=>'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'),`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00

Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`'prefixes'=>['xh'=>'http://www.w3.org/1999/xhtml'),`
			`'xpath' => "@checked[../../xh:input[@type='radio' or @type='checkbox']]",`
			`),`
			`*/`
			`array(`
			`'nodeNamespace'=>'http://www.w3.org/1999/xhtml',`
			`'attrName'=>array('alt', 'title'),`
			`),`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`);`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`const DOCTYPE = '<!DOCTYPE html>';`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`public function __construct($output, $options = array())`
			`{`
			`if (isset($options['encode_entities'])) {`
			`$this->encode = $options['encode_entities'];`
			`}`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`$this->outputMode = static::IM_IN_HTML;`
			`$this->out = $output;`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`// If HHVM, see https://github.com/facebook/hhvm/issues/2727`
			`$this->hasHTML5 = defined('ENT_HTML5') && !defined('HHVM_VERSION');`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`public function addRule(array $rule)`
			`{`
			`$this->nonBooleanAttributes[] = $rule;`
			`}`

			`public function setTraverser(\Masterminds\HTML5\Serializer\Traverser $traverser)`
			`{`
			`$this->traverser = $traverser;`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`return $this;`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00
			`public function document($dom)`
			`{`
			`$this->doctype();`
			`$this->traverser->node($dom->documentElement);`
			`$this->nl();`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`

Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`protected function doctype()`
			`{`
			`$this->wr(static::DOCTYPE);`
			`$this->nl();`
			`}`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`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 ($name == 'svg') {`
			`$this->outputMode = static::IM_IN_SVG;`
			`$name = Elements::normalizeSvgElement($name);`
			`} elseif ($name == 'math') {`
			`$this->outputMode = static::IM_IN_MATHML;`
			`}`

			`$this->openTag($ele);`
			`if (Elements::isA($name, Elements::TEXT_RAW)) {`
			`foreach ($ele->childNodes as $child) {`
			`$this->wr($child->data);`
			`}`
			`} else {`
			`// Handle children.`
			`if ($ele->hasChildNodes()) {`
			`$this->traverser->children($ele->childNodes);`
			`}`

			`// Close out the SVG or MathML special handling.`
			`if ($name == 'svg' \|\| $name == 'math') {`
			`$this->outputMode = static::IM_IN_HTML;`
			`}`
			`}`

			`// If not unary, add a closing tag.`
			`if (! Elements::isA($name, Elements::VOID_TAG)) {`
			`$this->closeTag($ele);`
			`}`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`

Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`/**`
			`* 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));`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`

Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`public function cdata($ele)`
			`{`
			`// This encodes CDATA.`
			`$this->wr($ele->ownerDocument->saveXML($ele));`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00
			`public function comment($ele)`
			`{`
			`// These produce identical output.`
			`// $this->wr('<!--')->wr($ele->data)->wr('-->');`
			`$this->wr($ele->ownerDocument->saveXML($ele));`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`

Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`public function processorInstruction($ele)`
			`{`
			`$this->wr('<?')`
			`->wr($ele->target)`
			`->wr(' ')`
			`->wr($ele->data)`
			`->wr('?>');`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`/**`
			`* 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('"');`
			`}`
			`}`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`

Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`/**`
			`* 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('>');`
			`} // If we are not in html mode we are in SVG, MathML, or XML embedded content.`
			`else {`
			`if ($ele->hasChildNodes()) {`
			`$this->wr('>');`
			`} // If there are no children this is self closing.`
			`else {`
			`$this->wr(' />');`
			`}`
			`}`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`

Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`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->name;`

			`// 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('"');`
			`}`
			`}`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00

			`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->query($rule['xpath'], $attr->ownerElement)->length){`
			`continue;`
			`}`
			`}`

			`return true;`
			`}`

			`return false;`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00
			`private function getXPath(\DOMNode $node){`
			`if(!$this->xpath){`
			`$this->xpath = new \DOMXPath($node->ownerDocument);`
			`}`
			`return $this->xpath;`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`

Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`/**`
			`* 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('>');`
			`}`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00
			`/**`
			`* Write to the output.`
			`*`
			`* @param string $text`
			`* The string to put into the output.`
			`*`
			`* @return \Masterminds\HTML5\Serializer\Traverser $this so it can be used in chaining.`
			`*/`
			`protected function wr($text)`
			`{`
			`fwrite($this->out, $text);`
			`return $this;`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00
			`/**`
			`* Write a new line character.`
			`*`
			`* @return \Masterminds\HTML5\Serializer\Traverser $this so it can be used in chaining.`
			`*/`
			`protected function nl()`
			`{`
			`fwrite($this->out, PHP_EOL);`
			`return $this;`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`
Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00
			`/**`
			`* 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 boolean $attribute`
			`* True if we are encoding an attrubute, false otherwise`
			`*`
			`* @return string The encoded text.`
			`*/`
			`protected function enc($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);`
			`} // If a version earlier than 5.4 html5 entities are not entirely handled.`
			`// This manually handles them.`
			`else {`
			`return strtr($text, \Masterminds\HTML5\Serializer\HTML5Entities::$map);`
			`}`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`

Full-Text RSS 3.4 2015-06-14 00:03:20 +00:00			`/**`
			`* 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 boolean $attribute`
			`* True if we are escaping an attrubute, false otherwise`
			`*/`
			`protected function escape($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(`
			`'"' => '"',`
			`'&' => '&',`
			`"\xc2\xa0" => ' '`
			`);`
			`} else {`
			`$replace = array(`
			`'<' => '<',`
			`'>' => '>',`
			`'&' => '&',`
			`"\xc2\xa0" => ' '`
			`);`
			`}`

			`return strtr($text, $replace);`
			`}`
Full-Text RSS 3.3 2014-09-15 20:24:06 +00:00			`}`