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<?php |
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/** |
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* @file |
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* Grafizzi\Graph\Graph: 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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class Graph extends AbstractElement implements GraphInterface { |
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/** |
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* Helper to simplify construction of strict graphs. |
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* |
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* @return array |
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*/ |
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public static function strict() { |
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return array('strict' => true); |
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} |
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/** |
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* Generate non-strict graphs by default |
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* |
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* @var boolean |
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*/ |
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public $fStrict = false; |
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/** |
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* Generate digraphs by default. |
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*/ |
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public $fDirected = true; |
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/** |
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* @param \Pimple\Container $dic |
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* @param string $name |
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* @param array $attributes |
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*/ |
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public function __construct(Container $dic, $name = 'G', array $attributes = array()) { |
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if (!isset($dic['directed'])) { |
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$dic['directed'] = true; |
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} |
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parent::__construct($dic); |
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$this->setName($name); |
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if (!empty($attributes)) { |
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if (isset($attributes['strict'])) { |
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$this->fStrict = $attributes['strict']; |
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unset($attributes['strict']); |
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} |
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$this->setAttributes($attributes); |
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} |
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} |
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/** |
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* @param bool|null $directed |
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* |
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* @return string |
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*/ |
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public function build($directed = null) { |
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// Allow overriding the build directed attribute. |
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if (isset($directed)) { |
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$savedDirected = $this->getDirected(); |
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$this->setDirected($directed); |
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} |
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else { |
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$savedDirected = true; |
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} |
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$actualDirected = $this->getDirected(); |
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$type = $this->getType(); |
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$buildName = $this->getBuildName(); |
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$elementIndent = str_repeat(' ', $this->fDepth * self::DEPTH_INDENT); |
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$childIndent = str_repeat(' ', ($this->fDepth + 1) * self::DEPTH_INDENT); |
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$strict = $this->fStrict ? 'strict ' : ''; |
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$ret = "$elementIndent$strict$type $buildName {\n"; |
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$ret_attributes = $this->buildAttributesHelper($this->fAttributes, $actualDirected, $childIndent); |
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$ret .= $ret_attributes; |
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$ret_children = $this->buildChildrenHelper($this->fChildren, $actualDirected); |
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if (!empty($ret_attributes) && !empty($ret_children)) { |
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$ret .= "\n"; |
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} |
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$ret .= "$ret_children$elementIndent} /* /$type $buildName */\n"; |
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// Restore the directed attribute if it was changed for build. |
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if (isset($directed)) { |
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$this->setDirected($savedDirected); |
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} |
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return $ret; |
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} |
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/** |
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* Helper for Graph::build(): build attributes. |
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* |
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* Unrelated with AbstractElement::buildAttributes(). |
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* |
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* @param \Grafizzi\Graph\AttributeInterface[] $attributes |
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* @param bool $directed |
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* @param string $childIndent |
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* |
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* @return string |
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*/ |
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protected function buildAttributesHelper(array $attributes, $directed, $childIndent) { |
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$ret = ''; |
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/** @var \Grafizzi\Graph\AttributeInterface $attribute */ |
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foreach ($attributes as $attribute) { |
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if ($built = $attribute->build($directed)) { |
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$ret .= "$childIndent$built;\n"; |
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} |
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} |
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return $ret; |
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} |
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/** |
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* Helper for Graph::build(): build children. |
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* |
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* @param \Grafizzi\Graph\AbstractElement[] $children |
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* @param bool $directed |
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* |
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* @return string |
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*/ |
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public function buildChildrenHelper(array $children, $directed) { |
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$ret = ''; |
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/** @var \Grafizzi\Graph\AbstractElement $child */ |
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foreach ($children as $child) { |
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$ret .= $child->build($directed); |
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} |
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return $ret; |
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} |
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public static function getAllowedChildTypes() { |
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$ret = array( |
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'cluster', |
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'edge', |
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'multiedge', // Grafizzi extension |
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'node', |
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'subgraph', |
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); |
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return $ret; |
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} |
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/** |
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* @return bool |
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*/ |
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public function getDirected() { |
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$ret = $this->fDirected; |
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return $ret; |
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} |
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/** |
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* @return string |
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*/ |
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public function getType() { |
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$ret = $this->getDirected() ? 'digraph' : 'graph'; |
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return $ret; |
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} |
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/** |
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* @param bool $directed |
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*/ |
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public function setDirected($directed) { |
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$this->fDirected = $directed; |
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} |
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} |
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FGM /
grafizzi
