ElggAutoP_8php_source.html

 <?php

 class ElggAutoP {

     public $encoding = 'UTF-8';

     protected $_doc = null;

     protected $_xpath = null;

     protected $_blocks = 'address article area aside blockquote caption col colgroup dd
         details div dl dt fieldset figure figcaption footer form h1 h2 h3 h4 h5 h6 header
         hr hgroup legend map math menu nav noscript p pre section select style summary
         table tbody td tfoot th thead tr ul ol option li';

     protected $_inlines = 'a abbr audio b button canvas caption cite code command datalist
         del dfn em embed i iframe img input ins kbd keygen label map mark meter object
         output progress q rp rt ruby s samp script select small source span strong style
         sub sup textarea time var video wbr';

     protected $_descendList = 'article aside blockquote body details div footer form
         header section';

     protected $_alterList = 'article aside blockquote body details div footer header
         section';

     protected $_unique = '';

     public function __construct() {
         $this->_blocks = preg_split('@\\s+@', $this->_blocks);
         $this->_descendList = preg_split('@\\s+@', $this->_descendList);
         $this->_alterList = preg_split('@\\s+@', $this->_alterList);
         $this->_inlines = preg_split('@\\s+@', $this->_inlines);
         $this->_unique = md5(__FILE__);
     }

     public function process($html) {
         // normalize whitespace
         $html = str_replace(array("\r\n", "\r"), "\n", $html);

         // allows preserving entities untouched
         $html = str_replace('&', $this->_unique . 'AMP', $html);

         $this->_doc = new DOMDocument();

         // parse to DOM, suppressing loadHTML warnings
         // http://www.php.net/manual/en/domdocument.loadhtml.php#95463
         libxml_use_internal_errors(true);

         // Do not load entities. May be unnecessary, better safe than sorry
         $disable_load_entities = libxml_disable_entity_loader(true);

         if (!$this->_doc->loadHTML("<html><meta http-equiv='content-type' "
                 . "content='text/html; charset={$this->encoding}'><body>{$html}</body>"
                 . "</html>")) {

             libxml_disable_entity_loader($disable_load_entities);
             return false;
         }

         libxml_disable_entity_loader($disable_load_entities);

         $this->_xpath = new DOMXPath($this->_doc);
         // start processing recursively at the BODY element
         $nodeList = $this->_xpath->query('//body[1]');
         $this->addParagraphs($nodeList->item(0));

         // serialize back to HTML
         $html = $this->_doc->saveHTML();

         // Note: we create <autop> elements, which will later be converted to paragraphs

         // split AUTOPs into multiples at /\n\n+/
         $html = preg_replace('/(' . $this->_unique . 'NL){2,}/', '</autop><autop>', $html);
         $html = str_replace(array($this->_unique . 'BR', $this->_unique . 'NL', '<br>'),
                 '<br />',
                 $html);
         $html = str_replace('<br /></autop>', '</autop>', $html);

         // re-parse so we can handle new AUTOP elements

         // Do not load entities. May be unnecessary, better safe than sorry
         $disable_load_entities = libxml_disable_entity_loader(true);

         if (!$this->_doc->loadHTML($html)) {
             libxml_disable_entity_loader($disable_load_entities);
             return false;
         }

         libxml_disable_entity_loader($disable_load_entities);

         // must re-create XPath object after DOM load
         $this->_xpath = new DOMXPath($this->_doc);

         // strip AUTOPs that only have comments/whitespace
         foreach ($this->_xpath->query('//autop') as $autop) {
             /* @var DOMElement $autop */
             $hasContent = false;
             if (trim($autop->textContent) !== '') {
                 $hasContent = true;
             } else {
                 foreach ($autop->childNodes as $node) {
                     if ($node->nodeType === XML_ELEMENT_NODE) {
                         $hasContent = true;
                         break;
                     }
                 }
             }
             if (!$hasContent) {
                 // mark to be later replaced w/ preg_replace (faster than moving nodes out)
                 $autop->setAttribute("r", "1");
             }
         }

         // If a DIV contains a single AUTOP, remove it
         foreach ($this->_xpath->query('//div') as $el) {
             /* @var DOMElement $el */
             $autops = $this->_xpath->query('./autop', $el);
             if ($autops->length === 1) {
                 $firstAutop = $autops->item(0);
                 /* @var DOMElement $firstAutop */
                 $firstAutop->setAttribute("r", "1");
             }
         }

         $html = $this->_doc->saveHTML();

         // trim to the contents of BODY
         $bodyStart = strpos($html, '<body>');
         $bodyEnd = strpos($html, '</body>', $bodyStart + 6);
         $html = substr($html, $bodyStart + 6, $bodyEnd - $bodyStart - 6);

         // strip AUTOPs that should be removed
         $html = preg_replace('@<autop r="1">(.*?)</autop>@', '\\1', $html);

         // commit to converting AUTOPs to Ps
         $html = str_replace('<autop>', "\n<p>", $html);
         $html = str_replace('</autop>', "</p>\n", $html);

         $html = str_replace('<br>', '<br />', $html);
         $html = str_replace($this->_unique . 'AMP', '&', $html);
         return $html;
     }

     protected function addParagraphs(DOMElement $el) {
         // no need to call recursively, just queue up
         $elsToProcess = array($el);
         $inlinesToProcess = array();
         while ($el = array_shift($elsToProcess)) {
             // if true, we can alter all child nodes, if not, we'll just call
             // addParagraphs on each element in the descendInto list
             $alterInline = in_array($el->nodeName, $this->_alterList);

             // inside affected elements, we want to trim leading whitespace from
             // the first text node
             $ltrimFirstTextNode = true;

             // should we open a new AUTOP element to move inline elements into?
             $openP = true;
             $autop = null;

             // after BR, ignore a newline
             $isFollowingBr = false;

             $node = $el->firstChild;
             while (null !== $node) {
                 if ($alterInline) {
                     if ($openP) {
                         $openP = false;
                         // create a P to move inline content into (this may be removed later)
                         $autop = $el->insertBefore($this->_doc->createElement('autop'), $node);
                     }
                 }

                 $isElement = ($node->nodeType === XML_ELEMENT_NODE);
                 if ($isElement) {
                     $isBlock = in_array($node->nodeName, $this->_blocks);
                     if (!$isBlock) {
                         // if we start with an inline element we don't need to do this
                         $ltrimFirstTextNode = false;
                     }
                 } else {
                     $isBlock = false;
                 }

                 if ($alterInline) {
                     $isText = ($node->nodeType === XML_TEXT_NODE);
                     $isLastInline = (! $node->nextSibling
                             || ($node->nextSibling->nodeType === XML_ELEMENT_NODE
                                 && in_array($node->nextSibling->nodeName, $this->_blocks)));
                     if ($isElement) {
                         $isFollowingBr = ($node->nodeName === 'br');
                     }

                     if ($isText) {
                         $nodeText = $node->nodeValue;

                         if ($ltrimFirstTextNode) {
                             // we're at the beginning of a sequence of text/inline elements
                             $nodeText = ltrim($nodeText);
                             $ltrimFirstTextNode = false;
                         }
                         if ($isFollowingBr && preg_match('@^[ \\t]*\\n[ \\t]*@', $nodeText, $m)) {
                             // if a user ends a line with <br>, don't add a second BR
                             $nodeText = substr($nodeText, strlen($m[0]));
                         }
                         if ($isLastInline) {
                             // we're at the end of a sequence of text/inline elements
                             $nodeText = rtrim($nodeText);
                         }
                         $nodeText = str_replace("\n", $this->_unique . 'NL', $nodeText);
                         $tmpNode = $node;
                         $node = $node->nextSibling; // move loop to next node

                         // alter node in place, then move into AUTOP
                         $tmpNode->nodeValue = $nodeText;
                         $autop->appendChild($tmpNode);

                         continue;
                     }
                 }
                 if ($isBlock || ! $node->nextSibling) {
                     if ($isBlock) {
                         if (in_array($node->nodeName, $this->_descendList)) {
                             $elsToProcess[] = $node;
                             //$this->addParagraphs($node);
                         }
                     }
                     $openP = true;
                     $ltrimFirstTextNode = true;
                 }
                 if ($alterInline) {
                     if (! $isBlock) {
                         $tmpNode = $node;
                         if ($isElement && false !== strpos($tmpNode->textContent, "\n")) {
                             $inlinesToProcess[] = $tmpNode;
                         }
                         $node = $node->nextSibling;
                         $autop->appendChild($tmpNode);
                         continue;
                     }
                 }

                 $node = $node->nextSibling;
             }
         }

         // handle inline nodes
         // no need to recurse, just queue up
         while ($el = array_shift($inlinesToProcess)) {
             $ignoreLeadingNewline = false;
             foreach ($el->childNodes as $node) {
                 if ($node->nodeType === XML_ELEMENT_NODE) {
                     if ($node->nodeValue === 'BR') {
                         $ignoreLeadingNewline = true;
                     } else {
                         $ignoreLeadingNewline = false;
                         if (false !== strpos($node->textContent, "\n")) {
                             $inlinesToProcess[] = $node;
                         }
                     }
                     continue;
                 } elseif ($node->nodeType === XML_TEXT_NODE) {
                     $text = $node->nodeValue;
                     if ($text[0] === "\n" && $ignoreLeadingNewline) {
                         $text = substr($text, 1);
                         $ignoreLeadingNewline = false;
                     }
                     $node->nodeValue = str_replace("\n", $this->_unique . 'BR', $text);
                 }
             }
         }
     }
 }
ElggAutoP\$encoding
$encoding
Definition: ElggAutoP.php:16

ElggAutoP\$_alterList
$_alterList
Definition: ElggAutoP.php:54

$m
$m
Definition: metadata.php:11

ElggAutoP\process
process($html)
Create wrapper P and BR elements in HTML depending on newlines.
Definition: ElggAutoP.php:82

ElggAutoP\$_blocks
$_blocks
Definition: ElggAutoP.php:28

ElggAutoP\$_doc
$_doc
Definition: ElggAutoP.php:21

ElggAutoP\$_xpath
$_xpath
Definition: ElggAutoP.php:26

$text
$text
Definition: default.php:25

ElggAutoP\$_descendList
$_descendList
Definition: ElggAutoP.php:46

$html
foreach($emails as $email) $html
Definition: exceptions.php:34

ElggAutoP\$_inlines
$_inlines
Definition: ElggAutoP.php:36

ElggAutoP\$_unique
$_unique
Definition: ElggAutoP.php:58

ElggAutoP\addParagraphs
addParagraphs(DOMElement $el)
Add P and BR elements as necessary.
Definition: ElggAutoP.php:196

ElggAutoP
Definition: ElggAutoP.php:14

ElggAutoP\__construct
__construct()
Constructor.
Definition: ElggAutoP.php:63