library/HTMLPurifier/ElementDef.php

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<?php

class HTMLPurifier_ElementDef
{
    
    public $standalone = true;
    
    public $attr = array();
    
    public $attr_transform_pre = array();
    
    public $attr_transform_post = array();
    
    public $child;
    
    public $content_model;
    
    public $content_model_type;
    
    
    
    public $descendants_are_inline = false;
    
    public $required_attr = array();
    
    public $excludes = array();
    
    public static function create($content_model, $content_model_type, $attr) {
        $def = new HTMLPurifier_ElementDef();
        $def->content_model = $content_model;
        $def->content_model_type = $content_model_type;
        $def->attr = $attr;
        return $def;
    }
    
    public function mergeIn($def) {
        
        // later keys takes precedence
        foreach($def->attr as $k => $v) {
            if ($k === 0) {
                // merge in the includes
                // sorry, no way to override an include
                foreach ($v as $v2) {
                    $this->attr[0][] = $v2;
                }
                continue;
            }
            if ($v === false) {
                if (isset($this->attr[$k])) unset($this->attr[$k]);
                continue;
            }
            $this->attr[$k] = $v;
        }
        $this->_mergeAssocArray($this->attr_transform_pre, $def->attr_transform_pre);
        $this->_mergeAssocArray($this->attr_transform_post, $def->attr_transform_post);
        $this->_mergeAssocArray($this->excludes, $def->excludes);
        
        if(!empty($def->content_model)) {
            $this->content_model .= ' | ' . $def->content_model;
            $this->child = false;
        }
        if(!empty($def->content_model_type)) {
            $this->content_model_type = $def->content_model_type;
            $this->child = false;
        }
        if(!is_null($def->child)) $this->child = $def->child;
        if($def->descendants_are_inline) $this->descendants_are_inline = $def->descendants_are_inline;
        
    }
    
    private function _mergeAssocArray(&$a1, $a2) {
        foreach ($a2 as $k => $v) {
            if ($v === false) {
                if (isset($a1[$k])) unset($a1[$k]);
                continue;
            }
            $a1[$k] = $v;
        }
    }
    
}

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