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<?php |
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/** |
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* @package s9e\TextFormatter |
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* @copyright Copyright (c) 2010-2018 The s9e Authors |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
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*/ |
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namespace s9e\TextFormatter\Configurator\RendererGenerators\PHP\XPathConvertor\Convertors; |
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class Math extends AbstractConvertor |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getRegexpGroups() |
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{ |
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return [ |
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'Addition' => 'Math', |
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'Division' => 'Math', |
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'MathSub' => 'Math', |
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'Multiplication' => 'Math', |
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'Substraction' => 'Math' |
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]; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getRegexps() |
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{ |
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$number = '((?&Attribute)|(?&MathSub)|(?&Number)|(?&Parameter))'; |
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$math = '((?&Math)|' . substr($number, 1); |
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return [ |
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'Addition' => $number . ' \\+ ' . $math, |
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'Division' => $number . ' div ' . $math, |
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'MathSub' => '\\( ((?&Math)) \\)', |
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'Multiplication' => $number . ' \\* ' . $math, |
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'Substraction' => $number . ' - ' . $math |
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]; |
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} |
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/** |
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* Convert an addition |
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* |
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* @param string $expr1 |
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* @param string $expr2 |
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* @return string |
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*/ |
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public function convertAddition($expr1, $expr2) |
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{ |
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return $this->convertOperation($expr1, '+', $expr2); |
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} |
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/** |
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* Convert a division |
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* |
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* @param string $expr1 |
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* @param string $expr2 |
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* @return string |
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*/ |
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public function convertDivision($expr1, $expr2) |
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{ |
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return $this->convertOperation($expr1, '/', $expr2); |
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} |
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/** |
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* Convert a math subexpression |
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* |
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* @param string $expr |
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* @return string |
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*/ |
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public function convertMathSub($expr) |
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{ |
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return '(' . $this->convert($expr) . ')'; |
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} |
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/** |
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* Convert a multiplication |
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* |
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* @param string $expr1 |
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* @param string $expr2 |
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* @return string |
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*/ |
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public function convertMultiplication($expr1, $expr2) |
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{ |
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return $this->convertOperation($expr1, '*', $expr2); |
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} |
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/** |
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* Convert a substraction |
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* |
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* @param string $expr1 |
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* @param string $expr2 |
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* @return string |
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*/ |
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public function convertSubstraction($expr1, $expr2) |
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{ |
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return $this->convertOperation($expr1, '-', $expr2); |
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} |
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/** |
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* Convert an operation |
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* |
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* @param string $expr1 |
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* @param string $operator |
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* @param string $expr2 |
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* @return string |
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*/ |
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protected function convertOperation($expr1, $operator, $expr2) |
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{ |
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$expr1 = $this->convert($expr1); |
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$expr2 = $this->convert($expr2); |
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// Prevent two consecutive minus signs to be interpreted as a post-decrement operator |
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if ($operator === '-' && $expr2[0] === '-') |
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{ |
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$operator .= ' '; |
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} |
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return $expr1 . $operator . $expr2; |
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} |
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} |
s9e /
TextFormatter
