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<?php |
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/** |
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* @file |
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* Grafizzi\Graph\Attribute: a component of the Grafizzi library. |
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* |
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* (c) 2012 Frédéric G. MARAND <[email protected]> |
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* |
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* Grafizzi is free software: you can redistribute it and/or modify it under the |
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* terms of the GNU Lesser General Public License as published by the Free |
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* Software Foundation, either version 3 of the License, or (at your option) any |
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* later version. |
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* |
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* Grafizzi is distributed in the hope that it will be useful, but WITHOUT ANY |
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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* details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with Grafizzi, in the COPYING.LESSER.txt file. If not, see |
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* <http://www.gnu.org/licenses/> |
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*/ |
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namespace Grafizzi\Graph; |
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use Pimple\Container; |
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/** |
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* An Element attribute. |
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*/ |
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class Attribute extends AbstractNamed implements AttributeInterface { |
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/** |
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* A hash of default values for allowed attributes. |
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* |
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* If it is empty, any attribute is allowed. |
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* |
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* @var array |
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*/ |
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public static $fDefaults = array(); |
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public $fValue; |
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/** |
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* @param \Pimple\Container $dic |
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* @param string $name |
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* @param mixed $value |
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* |
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* @see AttributeInterface::__construct() |
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*/ |
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public function __construct(Container $dic, $name, $value = null) { |
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parent::__construct($dic); |
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$this->setName($name); |
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$this->setValue($value); |
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} |
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/** |
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* @todo FIXME escape name, value more carefully |
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* |
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* @param boolean $directed |
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* Needed for signature conformity,but actually ignored. |
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* |
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* @return null|string |
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*/ |
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public function build($directed = null) { |
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$name = $this->getName(); |
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$this->logger->debug("Building attribute " . $name); |
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$value = $this->getValue(); |
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if ('title' == $name && empty($value)) { |
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$ret = null; |
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} |
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else { |
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$escape = in_array($name, array('label', 'headlabel', 'taillabel')); |
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$ret = "$name=" . self::escape($value, $escape); |
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} |
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return $ret; |
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} |
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/** |
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* @see AttributeInterface::getAllowedNames() |
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* |
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* @return array |
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*/ |
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public static function getAllowedNames() { |
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$ret = self::$fDefaults; |
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return $ret; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public static function getDefaultValue($name) { |
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$ret = isset(self::$fDefaults[$name]) |
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? self::$fDefaults[$name] |
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: null; |
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return $ret; |
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} |
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public function getType() { |
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$ret = 'attribute'; |
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return $ret; |
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} |
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public function getValue() { |
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return $this->fValue; |
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} |
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/** |
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* In addition to basic behavior, validate name. |
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* |
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* @see AbstractNamed::setName() |
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* |
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* @throws AttributeNameException |
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*/ |
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public function setName($name) { |
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if (!empty(self::$fDefaults) && !array_key_exists($name, self::$fDefaults)) { |
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$message = "Invalid attribute $name."; |
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$this->logger->error($message); |
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throw new AttributeNameException($message); |
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} |
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parent::setName($name); |
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} |
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/** |
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* Note: a null default value will work too: if $value is not null, the |
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* default is ignored, and if value is null, isset() fails, and fValue is set |
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* to $value, i.e. null too. |
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* |
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* @see AttributeInterface::setValue() |
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*/ |
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public function setValue($value = null) { |
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$this->logger->debug("{$this->fName}->value = " |
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. print_r($value, true) . "."); |
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if (!isset($value) && isset(self::$fDefaults[$this->fName])) { |
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$value = self::$fDefaults[$this->fName]; |
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} |
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$this->fValue = $value; |
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} |
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} |
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FGM /
grafizzi
