is_a(). @public */
}
/**
* Abstract class of a tag token (start, end or empty), and its behavior.
*/
class HTMLPurifier_Token_Tag extends HTMLPurifier_Token // abstract
{
/**
* Static bool marker that indicates the class is a tag.
*
* This allows us to check objects with !empty($obj->is_tag)
* without having to use a function call is_a().
*
* @public
*/
var $is_tag = true;
/**
* The lower-case name of the tag, like 'a', 'b' or 'blockquote'.
*
* @note Strictly speaking, XML tags are case sensitive, so we shouldn't
* be lower-casing them, but these tokens cater to HTML tags, which are
* insensitive.
*
* @public
*/
var $name;
/**
* Associative array of the tag's attributes.
*/
var $attributes = array();
/**
* Non-overloaded constructor, which lower-cases passed tag name.
*
* @param $name String name.
* @param $attributes Associative array of attributes.
*/
function HTMLPurifier_Token_Tag($name, $attributes = array()) {
//if ($attributes === null) var_dump(debug_backtrace());
$this->name = ctype_lower($name) ? $name : strtolower($name);
foreach ($attributes as $key => $value) {
// normalization only necessary when key is not lowercase
if (!ctype_lower($key)) {
$new_key = strtolower($key);
if (!isset($attributes[$new_key])) {
$attributes[$new_key] = $attributes[$key];
}
if ($new_key !== $key) {
unset($attributes[$key]);
}
}
}
$this->attributes = $attributes;
}
}
/**
* Concrete start token class.
*/
class HTMLPurifier_Token_Start extends HTMLPurifier_Token_Tag
{
var $type = 'start';
function copy() {
return new HTMLPurifier_Token_Start($this->name, $this->attributes);
}
}
/**
* Concrete empty token class.
*/
class HTMLPurifier_Token_Empty extends HTMLPurifier_Token_Tag
{
var $type = 'empty';
function copy() {
return new HTMLPurifier_Token_Empty($this->name, $this->attributes);
}
}
/**
* Concrete end token class.
*
* @warning This class accepts attributes even though end tags cannot. This
* is for optimization reasons, as under normal circumstances, the Lexers
* do not pass attributes.
*/
class HTMLPurifier_Token_End extends HTMLPurifier_Token_Tag
{
var $type = 'end';
function copy() {
return new HTMLPurifier_Token_End($this->name);
}
}
/**
* Concrete text token class.
*
* Text tokens comprise of regular parsed character data (PCDATA) and raw
* character data (from the CDATA sections). Internally, their
* data is parsed with all entities expanded. Surprisingly, the text token
* does have a "tag name" called #PCDATA, which is how the DTD represents it
* in permissible child nodes.
*/
class HTMLPurifier_Token_Text extends HTMLPurifier_Token
{
var $name = '#PCDATA'; /**< PCDATA tag name compatible with DTD. @public */
var $type = 'text';
var $data; /**< Parsed character data of text. @public */
var $is_whitespace; /**< Bool indicating if node is whitespace. @public */
/**
* Constructor, accepts data and determines if it is whitespace.
*
* @param $data String parsed character data.
*/
function HTMLPurifier_Token_Text($data) {
$this->data = $data;
$this->is_whitespace = ctype_space($data);
}
function copy() {
return new HTMLPurifier_Token_Text($this->data);
}
}
/**
* Concrete comment token class. Generally will be ignored.
*/
class HTMLPurifier_Token_Comment extends HTMLPurifier_Token
{
var $data; /**< Character data within comment. @public */
var $type = 'comment';
/**
* Transparent constructor.
*
* @param $data String comment data.
*/
function HTMLPurifier_Token_Comment($data) {
$this->data = $data;
}
function copy() {
return new HTMLPurifier_Token_Comment($this->data);
}
}
?>