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<?php |
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namespace FluentDOM { |
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class Namespaces implements NamespaceResolver, \ArrayAccess, \IteratorAggregate, \Countable { |
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/** |
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* @var array |
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*/ |
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private $_namespaces = []; |
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/** |
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* @var array |
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*/ |
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private $_reserved = [ |
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'xml' => 'http://www.w3.org/XML/1998/namespace', |
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'xmlns' => 'http://www.w3.org/2000/xmlns/' |
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]; |
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/** |
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* Namespaces constructor. |
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* @param null|array|\Traversable $namespaces |
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*/ |
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public function __construct($namespaces = NULL) { |
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if (isset($namespaces)) { |
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$this->assign($namespaces); |
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} |
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} |
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public function resolveNamespace($prefix) { |
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return $this[$prefix]; |
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} |
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public function isReservedPrefix($prefix) { |
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return array_key_exists($prefix, $this->_reserved); |
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} |
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public function offsetExists($prefix) { |
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return array_key_exists($prefix, $this->_reserved) || array_key_exists($prefix, $this->_namespaces); |
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} |
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public function offsetSet($prefix, $namespaceUri) { |
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$prefix = $this->validatePrefix($prefix); |
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if (isset($this->_reserved[$prefix])) { |
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throw new \LogicException( |
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sprintf('Can not register reserved namespace prefix "%s".', $prefix) |
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); |
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} |
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$this->_namespaces[$prefix] = $namespaceUri; |
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} |
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public function offsetGet($prefix) { |
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$prefix = $this->validatePrefix($prefix); |
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if (array_key_exists($prefix, $this->_reserved)) { |
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return $this->_reserved[$prefix]; |
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} elseif (array_key_exists($prefix, $this->_namespaces)) { |
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return $this->_namespaces[$prefix]; |
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} elseif ($prefix === '#default') { |
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return ''; |
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} |
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throw new \LogicException( |
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sprintf('Unknown namespace prefix "%s".', $prefix) |
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); |
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} |
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public function offsetUnset($prefix) { |
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$prefix = $this->validatePrefix($prefix); |
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if (array_key_exists($prefix, $this->_namespaces)) { |
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unset($this->_namespaces[$prefix]); |
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} |
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} |
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public function getIterator() { |
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return new \ArrayIterator($this->_namespaces); |
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} |
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public function count() { |
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return count($this->_namespaces); |
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} |
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/** |
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* @param array|\Traversable $namespaces |
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*/ |
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public function assign($namespaces) { |
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$this->_namespaces = []; |
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foreach ($namespaces as $prefix => $namespaceUri) { |
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$this->offsetSet($prefix, $namespaceUri); |
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} |
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} |
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/** |
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* @param string $prefix |
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* @return string |
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*/ |
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private function validatePrefix($prefix) { |
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return empty($prefix) ? '#default' : $prefix; |
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} |
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} |
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} |
FluentDOM /
FluentDOM
