115 lines
2.7 KiB
PHP
115 lines
2.7 KiB
PHP
<?php
|
|
namespace HTML5\Parser;
|
|
|
|
use HTML5\Elements;
|
|
|
|
/**
|
|
* Handles special-case rules for the DOM tree builder.
|
|
*
|
|
* Many tags have special rules that need to be accomodated on an
|
|
* individual basis. This class handles those rules.
|
|
*
|
|
* See section 8.1.2.4 of the spec.
|
|
*
|
|
* @todo
|
|
* - colgroup and col special behaviors
|
|
* - body and head special behaviors
|
|
*/
|
|
class TreeBuildingRules {
|
|
|
|
protected static $tags = array(
|
|
'li' => 1,
|
|
'dd' => 1,
|
|
'dt' => 1,
|
|
'rt' => 1,
|
|
'rp' => 1,
|
|
'tr' => 1,
|
|
'th' => 1,
|
|
'td' => 1,
|
|
'thead' => 1,
|
|
'tfoot' => 1,
|
|
'tbody' => 1,
|
|
'table' => 1,
|
|
'optgroup' => 1,
|
|
'option' => 1,
|
|
);
|
|
|
|
/**
|
|
* Build a new rules engine.
|
|
*
|
|
* @param \DOMDocument $doc
|
|
* The DOM document to use for evaluation and modification.
|
|
*/
|
|
public function __construct($doc) {
|
|
$this->doc = $doc;
|
|
}
|
|
|
|
/**
|
|
* Returns TRUE if the given tagname has special processing rules.
|
|
*/
|
|
public function hasRules($tagname) {
|
|
return isset(static::$tags[$tagname]);
|
|
}
|
|
|
|
/**
|
|
* Evaluate the rule for the current tag name.
|
|
*
|
|
* This may modify the existing DOM.
|
|
*
|
|
* @return \DOMElement
|
|
* The new Current DOM element.
|
|
*/
|
|
public function evaluate($new, $current) {
|
|
|
|
switch($new->tagName) {
|
|
case 'li':
|
|
return $this->handleLI($new, $current);
|
|
case 'dt':
|
|
case 'dd':
|
|
return $this->handleDT($new, $current);
|
|
case 'rt':
|
|
case 'rp':
|
|
return $this->handleRT($new, $current);
|
|
case 'optgroup':
|
|
return $this->closeIfCurrentMatches($new, $current, array('optgroup'));
|
|
case 'option':
|
|
return $this->closeIfCurrentMatches($new, $current, array('option', 'optgroup'));
|
|
case 'tr':
|
|
return $this->closeIfCurrentMatches($new, $current, array('tr'));
|
|
case 'td':
|
|
case 'th':
|
|
return $this->closeIfCurrentMatches($new, $current, array('th', 'td'));
|
|
case 'tbody':
|
|
case 'thead':
|
|
case 'tfoot':
|
|
case 'table': // Spec isn't explicit about this, but it's necessary.
|
|
return $this->closeIfCurrentMatches($new, $current, array('thead', 'tfoot', 'tbody'));
|
|
}
|
|
|
|
return $current;
|
|
}
|
|
|
|
protected function handleLI($ele, $current) {
|
|
return $this->closeIfCurrentMatches($ele, $current, array('li'));
|
|
}
|
|
|
|
protected function handleDT($ele, $current) {
|
|
return $this->closeIfCurrentMatches($ele, $current, array('dt','dd'));
|
|
}
|
|
protected function handleRT($ele, $current) {
|
|
return $this->closeIfCurrentMatches($ele, $current, array('rt','rp'));
|
|
}
|
|
|
|
protected function closeIfCurrentMatches($ele, $current, $match) {
|
|
$tname = $current->tagName;
|
|
if (in_array($current->tagName, $match)) {
|
|
$current->parentNode->appendChild($ele);
|
|
}
|
|
else {
|
|
$current->appendChild($ele);
|
|
}
|
|
return $ele;
|
|
|
|
}
|
|
}
|