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<?php

/**

* Factory for token generation.

* @note Doing some benchmarking indicates that the new operator is much

*       slower than the clone operator (even discounting the cost of the

*       constructor).  This class is for that optimization.

*       Other then that, there's not much point as we don't

*       maintain parallel HTMLPurifier_Token hierarchies (the main reason why

*       you'd want to use an abstract factory).

* @todo Port DirectLex to use this

class HTMLPurifier_TokenFactory

{

// p stands for prototype

/**

* @type HTMLPurifier_Token_Start

private $p_start;

/**

* @type HTMLPurifier_Token_End

private $p_end;

/**

* @type HTMLPurifier_Token_Empty

private $p_empty;

/**

* @type HTMLPurifier_Token_Text

private $p_text;

/**

* @type HTMLPurifier_Token_Comment

private $p_comment;

/**

* Generates blank prototypes for cloning.

public function __construct()

{

$this->p_start = new HTMLPurifier_Token_Start('', array());

$this->p_end = new HTMLPurifier_Token_End('');

$this->p_empty = new HTMLPurifier_Token_Empty('', array());

$this->p_text = new HTMLPurifier_Token_Text('');

$this->p_comment = new HTMLPurifier_Token_Comment('');

}

/**

* Creates a HTMLPurifier_Token_Start.

* @param string $name Tag name

* @param array $attr Associative array of attributes

* @return HTMLPurifier_Token_Start Generated HTMLPurifier_Token_Start

public function createStart($name, $attr = array())

{

$p = clone $this->p_start;

$p->__construct($name, $attr);

return $p;

}

/**

* Creates a HTMLPurifier_Token_End.

* @param string $name Tag name

* @return HTMLPurifier_Token_End Generated HTMLPurifier_Token_End

public function createEnd($name)

{

$p = clone $this->p_end;

$p->__construct($name);

return $p;

}

/**

* Creates a HTMLPurifier_Token_Empty.

* @param string $name Tag name

* @param array $attr Associative array of attributes

* @return HTMLPurifier_Token_Empty Generated HTMLPurifier_Token_Empty

public function createEmpty($name, $attr = array())

{

$p = clone $this->p_empty;

$p->__construct($name, $attr);

return $p;

}

/**

* Creates a HTMLPurifier_Token_Text.

* @param string $data Data of text token

* @return HTMLPurifier_Token_Text Generated HTMLPurifier_Token_Text

public function createText($data)

{

$p = clone $this->p_text;

$p->__construct($data);

return $p;

}

/**

* Creates a HTMLPurifier_Token_Comment.

* @param string $data Data of comment token

* @return HTMLPurifier_Token_Comment Generated HTMLPurifier_Token_Comment

public function createComment($data)

{

$p = clone $this->p_comment;

$p->__construct($data);

return $p;

}

// vim: et sw=4 sts=4

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