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<?php |
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/** |
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* Generic property list implementation |
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*/ |
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class HTMLPurifier_PropertyList |
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{ |
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/** |
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* Internal data-structure for properties. |
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* @type array |
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*/ |
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protected $data = array(); |
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/** |
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* Parent plist. |
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* @type HTMLPurifier_PropertyList |
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*/ |
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protected $parent; |
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/** |
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* Cache. |
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* @type array |
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*/ |
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protected $cache; |
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/** |
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* @param HTMLPurifier_PropertyList $parent Parent plist |
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*/ |
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public function __construct($parent = null) |
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{ |
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$this->parent = $parent; |
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} |
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/** |
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* Recursively retrieves the value for a key |
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* @param string $name |
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* @throws HTMLPurifier_Exception |
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*/ |
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public function get($name) |
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{ |
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if ($this->has($name)) { |
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return $this->data[$name]; |
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} |
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// possible performance bottleneck, convert to iterative if necessary |
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if ($this->parent) { |
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return $this->parent->get($name); |
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} |
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throw new HTMLPurifier_Exception("Key '$name' not found"); |
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} |
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/** |
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* Sets the value of a key, for this plist |
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* @param string $name |
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* @param mixed $value |
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*/ |
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public function set($name, $value) |
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{ |
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$this->data[$name] = $value; |
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} |
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/** |
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* Returns true if a given key exists |
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* @param string $name |
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* @return bool |
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*/ |
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public function has($name) |
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{ |
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return array_key_exists($name, $this->data); |
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} |
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/** |
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* Resets a value to the value of it's parent, usually the default. If |
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* no value is specified, the entire plist is reset. |
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* @param string $name |
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*/ |
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public function reset($name = null) |
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{ |
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if ($name == null) { |
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$this->data = array(); |
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} else { |
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unset($this->data[$name]); |
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} |
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} |
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/** |
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* Squashes this property list and all of its property lists into a single |
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* array, and returns the array. This value is cached by default. |
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* @param bool $force If true, ignores the cache and regenerates the array. |
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* @return array |
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*/ |
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public function squash($force = false) |
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{ |
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if ($this->cache !== null && !$force) { |
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return $this->cache; |
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} |
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if ($this->parent) { |
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return $this->cache = array_merge($this->parent->squash($force), $this->data); |
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} else { |
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return $this->cache = $this->data; |
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} |
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} |
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/** |
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* Returns the parent plist. |
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* @return HTMLPurifier_PropertyList |
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*/ |
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public function getParent() |
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{ |
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return $this->parent; |
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} |
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/** |
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* Sets the parent plist. |
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* @param HTMLPurifier_PropertyList $plist Parent plist |
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*/ |
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public function setParent($plist) |
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{ |
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$this->parent = $plist; |
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} |
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} |
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// vim: et sw=4 sts=4 |
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XOOPS /
XoopsCore25
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