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See Release Notes

  • Bug fixes for general core bugs in 4.2.x will end 22 April 2024 (12 months).
  • Bug fixes for security issues in 4.2.x will end 7 October 2024 (18 months).
  • PHP version: minimum PHP 8.0.0 Note: minimum PHP version has increased since Moodle 4.1. PHP 8.1.x is supported too.
<?php

/**
 * SCSSPHP
 *
 * @copyright 2012-2020 Leaf Corcoran
 *
 * @license http://opensource.org/licenses/MIT MIT
 *
 * @link http://scssphp.github.io/scssphp
 */

namespace ScssPhp\ScssPhp\Node;

> use ScssPhp\ScssPhp\Base\Range;
use ScssPhp\ScssPhp\Compiler;
> use ScssPhp\ScssPhp\Exception\RangeException;
use ScssPhp\ScssPhp\Exception\SassScriptException; use ScssPhp\ScssPhp\Node; use ScssPhp\ScssPhp\Type;
> use ScssPhp\ScssPhp\Util;
/** * Dimension + optional units * * {@internal * This is a work-in-progress. * * The \ArrayAccess interface is temporary until the migration is complete. * }} * * @author Anthon Pang <anthon.pang@gmail.com>
> * */ > * @template-implements \ArrayAccess<int, mixed>
class Number extends Node implements \ArrayAccess { const PRECISION = 10; /**
< * @var integer
> * @var int
* @deprecated use {Number::PRECISION} instead to read the precision. Configuring it is not supported anymore. */ public static $precision = self::PRECISION; /** * @see http://www.w3.org/TR/2012/WD-css3-values-20120308/ * * @var array
> * @phpstan-var array<string, array<string, float|int>>
*/ protected static $unitTable = [ 'in' => [ 'in' => 1, 'pc' => 6, 'pt' => 72, 'px' => 96, 'cm' => 2.54, 'mm' => 25.4, 'q' => 101.6, ], 'turn' => [ 'deg' => 360, 'grad' => 400, 'rad' => 6.28318530717958647692528676, // 2 * M_PI 'turn' => 1, ], 's' => [ 's' => 1, 'ms' => 1000, ], 'Hz' => [ 'Hz' => 1, 'kHz' => 0.001, ], 'dpi' => [ 'dpi' => 1, 'dpcm' => 1 / 2.54, 'dppx' => 1 / 96, ], ]; /**
< * @var integer|float
> * @var int|float
*/ private $dimension; /** * @var string[] * @phpstan-var list<string> */ private $numeratorUnits; /** * @var string[] * @phpstan-var list<string> */ private $denominatorUnits; /** * Initialize number *
< * @param integer|float $dimension
> * @param int|float $dimension
* @param string[]|string $numeratorUnits * @param string[] $denominatorUnits * * @phpstan-param list<string>|string $numeratorUnits * @phpstan-param list<string> $denominatorUnits */ public function __construct($dimension, $numeratorUnits, array $denominatorUnits = []) { if (is_string($numeratorUnits)) { $numeratorUnits = $numeratorUnits ? [$numeratorUnits] : []; } elseif (isset($numeratorUnits['numerator_units'], $numeratorUnits['denominator_units'])) { // TODO get rid of this once `$number[2]` is not used anymore $denominatorUnits = $numeratorUnits['denominator_units']; $numeratorUnits = $numeratorUnits['numerator_units']; } $this->dimension = $dimension; $this->numeratorUnits = $numeratorUnits; $this->denominatorUnits = $denominatorUnits; } /** * @return float|int */ public function getDimension() { return $this->dimension; } /** * @return string[] */ public function getNumeratorUnits() { return $this->numeratorUnits; } /** * @return string[] */ public function getDenominatorUnits() { return $this->denominatorUnits; } /**
< * {@inheritdoc}
> * @return bool
*/
> #[\ReturnTypeWillChange]
public function offsetExists($offset) { if ($offset === -3) { return ! \is_null($this->sourceColumn); } if ($offset === -2) { return ! \is_null($this->sourceLine); } if ( $offset === -1 || $offset === 0 || $offset === 1 || $offset === 2 ) { return true; } return false; } /**
< * {@inheritdoc}
> * @return mixed
*/
> #[\ReturnTypeWillChange]
public function offsetGet($offset) { switch ($offset) { case -3: return $this->sourceColumn; case -2: return $this->sourceLine; case -1: return $this->sourceIndex; case 0: return Type::T_NUMBER; case 1: return $this->dimension; case 2: return array('numerator_units' => $this->numeratorUnits, 'denominator_units' => $this->denominatorUnits); } } /**
< * {@inheritdoc}
> * @return void
*/
> #[\ReturnTypeWillChange]
public function offsetSet($offset, $value) { throw new \BadMethodCallException('Number is immutable'); } /**
< * {@inheritdoc}
> * @return void
*/
> #[\ReturnTypeWillChange]
public function offsetUnset($offset) { throw new \BadMethodCallException('Number is immutable'); } /** * Returns true if the number is unitless *
< * @return boolean
> * @return bool
*/ public function unitless() { return \count($this->numeratorUnits) === 0 && \count($this->denominatorUnits) === 0; } /**
> * Returns true if the number has any units * Checks whether the number has exactly this unit > * * > * @return bool * @param string $unit > */ * > public function hasUnits() * @return bool > { */ > return !$this->unitless(); public function hasUnit($unit) > } { > return \count($this->numeratorUnits) === 1 && \count($this->denominatorUnits) === 0 && $this->numeratorUnits[0] === $unit; > /**
} /** * Returns unit(s) as the product of numerator units divided by the product of denominator units * * @return string */ public function unitStr() { if ($this->unitless()) { return ''; } return self::getUnitString($this->numeratorUnits, $this->denominatorUnits); } /**
> * @param float|int $min * @param string|null $varName > * @param float|int $max * > * @param string|null $name * @return void > * */ > * @return float|int public function assertNoUnits($varName = null) > * @throws SassScriptException { > */ if ($this->unitless()) { > public function valueInRange($min, $max, $name = null) return; > { } > try { > return Util::checkRange('', new Range($min, $max), $this); throw SassScriptException::forArgument(sprintf('Expected %s to have no units', $this), $varName); > } catch (RangeException $e) { } > throw SassScriptException::forArgument(sprintf('Expected %s to be within %s%s and %s%3$s.', $this, $min, $this->unitStr(), $max), $name); > } /** > } * @param Number $other > * > /** * @return void > * @param float|int $min */ > * @param float|int $max public function assertSameUnitOrUnitless(Number $other) > * @param string $name { > * @param string $unit if ($other->unitless()) { > * return; > * @return float|int } > * @throws SassScriptException > * if ($this->numeratorUnits === $other->numeratorUnits && $this->denominatorUnits === $other->denominatorUnits) { > * @internal return; > */ } > public function valueInRangeWithUnit($min, $max, $name, $unit) > { throw new SassScriptException(sprintf( > try { 'Incompatible units %s and %s.', > return Util::checkRange('', new Range($min, $max), $this); self::getUnitString($this->numeratorUnits, $this->denominatorUnits), > } catch (RangeException $e) { self::getUnitString($other->numeratorUnits, $other->denominatorUnits) > throw SassScriptException::forArgument(sprintf('Expected %s to be within %s%s and %s%3$s.', $this, $min, $unit, $max), $name); )); > } } > } > /** > /**
< throw SassScriptException::forArgument(sprintf('Expected %s to have no units', $this), $varName);
> throw SassScriptException::forArgument(sprintf('Expected %s to have no units.', $this), $varName); > } > > /** > * @param string $unit > * @param string|null $varName > * > * @return void > */ > public function assertUnit($unit, $varName = null) > { > if ($this->hasUnit($unit)) { > return; > } > > throw SassScriptException::forArgument(sprintf('Expected %s to have unit "%s".', $this, $unit), $varName);
*
> * Returns a copy of this number, converted to the units represented by $newNumeratorUnits and $newDenominatorUnits. * @return bool > * */ > * This does not throw an error if this number is unitless and public function isComparableTo(Number $other) > * $newNumeratorUnits/$newDenominatorUnits are not empty, or vice versa. Instead, { > * it treats all unitless numbers as convertible to and from all units without if ($this->unitless() || $other->unitless()) { > * changing the value. return true; > * } > * @param string[] $newNumeratorUnits > * @param string[] $newDenominatorUnits try { > * $this->greaterThan($other); > * @return Number return true; > * } catch (SassScriptException $e) { > * @phpstan-param list<string> $newNumeratorUnits return false; > * @phpstan-param list<string> $newDenominatorUnits } > * } > * @throws SassScriptException if this number's units are not compatible with $newNumeratorUnits and $newDenominatorUnits > */ /** > public function coerce(array $newNumeratorUnits, array $newDenominatorUnits) * @param Number $other > { * > return new Number($this->valueInUnits($newNumeratorUnits, $newDenominatorUnits), $newNumeratorUnits, $newDenominatorUnits); * @return bool > } */ > public function lessThan(Number $other) > /**
{ return $this->coerceUnits($other, function ($num1, $num2) { return $num1 < $num2; }); } /** * @param Number $other * * @return bool */ public function lessThanOrEqual(Number $other) { return $this->coerceUnits($other, function ($num1, $num2) { return $num1 <= $num2; }); } /** * @param Number $other * * @return bool */ public function greaterThan(Number $other) { return $this->coerceUnits($other, function ($num1, $num2) { return $num1 > $num2; }); } /** * @param Number $other * * @return bool */ public function greaterThanOrEqual(Number $other) { return $this->coerceUnits($other, function ($num1, $num2) { return $num1 >= $num2; }); } /** * @param Number $other * * @return Number */ public function plus(Number $other) { return $this->coerceNumber($other, function ($num1, $num2) { return $num1 + $num2; }); } /** * @param Number $other * * @return Number */ public function minus(Number $other) { return $this->coerceNumber($other, function ($num1, $num2) { return $num1 - $num2; }); } /** * @return Number */ public function unaryMinus() { return new Number(-$this->dimension, $this->numeratorUnits, $this->denominatorUnits); } /** * @param Number $other * * @return Number */ public function modulo(Number $other) { return $this->coerceNumber($other, function ($num1, $num2) { if ($num2 == 0) { return NAN; } $result = fmod($num1, $num2); if ($result == 0) { return 0; } if ($num2 < 0 xor $num1 < 0) { $result += $num2; } return $result; }); } /** * @param Number $other * * @return Number */ public function times(Number $other) { return $this->multiplyUnits($this->dimension * $other->dimension, $this->numeratorUnits, $this->denominatorUnits, $other->numeratorUnits, $other->denominatorUnits); } /** * @param Number $other * * @return Number */ public function dividedBy(Number $other) { if ($other->dimension == 0) { if ($this->dimension == 0) { $value = NAN; } elseif ($this->dimension > 0) { $value = INF; } else { $value = -INF; } } else { $value = $this->dimension / $other->dimension; } return $this->multiplyUnits($value, $this->numeratorUnits, $this->denominatorUnits, $other->denominatorUnits, $other->numeratorUnits); } /** * @param Number $other * * @return bool */ public function equals(Number $other) { // Unitless numbers are convertable to unit numbers, but not equal, so we special-case unitless here. if ($this->unitless() !== $other->unitless()) { return false; } // In Sass, neither NaN nor Infinity are equal to themselves, while PHP defines INF==INF if (is_nan($this->dimension) || is_nan($other->dimension) || !is_finite($this->dimension) || !is_finite($other->dimension)) { return false; } if ($this->unitless()) { return round($this->dimension, self::PRECISION) == round($other->dimension, self::PRECISION); } try { return $this->coerceUnits($other, function ($num1, $num2) { return round($num1,self::PRECISION) == round($num2, self::PRECISION); }); } catch (SassScriptException $e) { return false; } } /** * Output number * * @param \ScssPhp\ScssPhp\Compiler $compiler * * @return string */ public function output(Compiler $compiler = null) { $dimension = round($this->dimension, self::PRECISION); if (is_nan($dimension)) { return 'NaN'; } if ($dimension === INF) { return 'Infinity'; } if ($dimension === -INF) { return '-Infinity'; } if ($compiler) { $unit = $this->unitStr(); } elseif (isset($this->numeratorUnits[0])) { $unit = $this->numeratorUnits[0]; } else { $unit = ''; } $dimension = number_format($dimension, self::PRECISION, '.', ''); return rtrim(rtrim($dimension, '0'), '.') . $unit; } /** * {@inheritdoc} */ public function __toString() { return $this->output(); } /** * @param Number $other * @param callable $operation * * @return Number * * @phpstan-param callable(int|float, int|float): (int|float) $operation */ private function coerceNumber(Number $other, $operation) { $result = $this->coerceUnits($other, $operation); if (!$this->unitless()) { return new Number($result, $this->numeratorUnits, $this->denominatorUnits); } return new Number($result, $other->numeratorUnits, $other->denominatorUnits); } /** * @param Number $other * @param callable $operation * * @return mixed * * @phpstan-template T * @phpstan-param callable(int|float, int|float): T $operation * @phpstan-return T */ private function coerceUnits(Number $other, $operation) { if (!$this->unitless()) { $num1 = $this->dimension; $num2 = $other->valueInUnits($this->numeratorUnits, $this->denominatorUnits); } else { $num1 = $this->valueInUnits($other->numeratorUnits, $other->denominatorUnits); $num2 = $other->dimension; } return \call_user_func($operation, $num1, $num2); } /** * @param string[] $numeratorUnits * @param string[] $denominatorUnits * * @return int|float * * @phpstan-param list<string> $numeratorUnits * @phpstan-param list<string> $denominatorUnits
> * */ > * @throws SassScriptException if this number's units are not compatible with $numeratorUnits and $denominatorUnits
private function valueInUnits(array $numeratorUnits, array $denominatorUnits) { if ( $this->unitless() || (\count($numeratorUnits) === 0 && \count($denominatorUnits) === 0) || ($this->numeratorUnits === $numeratorUnits && $this->denominatorUnits === $denominatorUnits) ) { return $this->dimension; } $value = $this->dimension; $oldNumerators = $this->numeratorUnits; foreach ($numeratorUnits as $newNumerator) { foreach ($oldNumerators as $key => $oldNumerator) { $conversionFactor = self::getConversionFactor($newNumerator, $oldNumerator); if (\is_null($conversionFactor)) { continue; } $value *= $conversionFactor; unset($oldNumerators[$key]); continue 2; } throw new SassScriptException(sprintf( 'Incompatible units %s and %s.', self::getUnitString($this->numeratorUnits, $this->denominatorUnits), self::getUnitString($numeratorUnits, $denominatorUnits) )); } $oldDenominators = $this->denominatorUnits; foreach ($denominatorUnits as $newDenominator) { foreach ($oldDenominators as $key => $oldDenominator) { $conversionFactor = self::getConversionFactor($newDenominator, $oldDenominator); if (\is_null($conversionFactor)) { continue; } $value /= $conversionFactor; unset($oldDenominators[$key]); continue 2; } throw new SassScriptException(sprintf( 'Incompatible units %s and %s.', self::getUnitString($this->numeratorUnits, $this->denominatorUnits), self::getUnitString($numeratorUnits, $denominatorUnits) )); } if (\count($oldNumerators) || \count($oldDenominators)) { throw new SassScriptException(sprintf( 'Incompatible units %s and %s.', self::getUnitString($this->numeratorUnits, $this->denominatorUnits), self::getUnitString($numeratorUnits, $denominatorUnits) )); } return $value; } /** * @param int|float $value * @param string[] $numerators1 * @param string[] $denominators1 * @param string[] $numerators2 * @param string[] $denominators2 * * @return Number * * @phpstan-param list<string> $numerators1 * @phpstan-param list<string> $denominators1 * @phpstan-param list<string> $numerators2 * @phpstan-param list<string> $denominators2 */ private function multiplyUnits($value, array $numerators1, array $denominators1, array $numerators2, array $denominators2) { $newNumerators = array(); foreach ($numerators1 as $numerator) { foreach ($denominators2 as $key => $denominator) { $conversionFactor = self::getConversionFactor($numerator, $denominator); if (\is_null($conversionFactor)) { continue; } $value /= $conversionFactor; unset($denominators2[$key]); continue 2; } $newNumerators[] = $numerator; } foreach ($numerators2 as $numerator) { foreach ($denominators1 as $key => $denominator) { $conversionFactor = self::getConversionFactor($numerator, $denominator); if (\is_null($conversionFactor)) { continue; } $value /= $conversionFactor; unset($denominators1[$key]); continue 2; } $newNumerators[] = $numerator; } $newDenominators = array_values(array_merge($denominators1, $denominators2)); return new Number($value, $newNumerators, $newDenominators); } /** * Returns the number of [unit1]s per [unit2]. * * Equivalently, `1unit1 * conversionFactor(unit1, unit2) = 1unit2`. * * @param string $unit1 * @param string $unit2 * * @return float|int|null */ private static function getConversionFactor($unit1, $unit2) { if ($unit1 === $unit2) { return 1; } foreach (static::$unitTable as $unitVariants) { if (isset($unitVariants[$unit1]) && isset($unitVariants[$unit2])) { return $unitVariants[$unit1] / $unitVariants[$unit2]; } } return null; } /** * Returns unit(s) as the product of numerator units divided by the product of denominator units * * @param string[] $numerators * @param string[] $denominators * * @phpstan-param list<string> $numerators * @phpstan-param list<string> $denominators * * @return string */ private static function getUnitString(array $numerators, array $denominators) { if (!\count($numerators)) { if (\count($denominators) === 0) { return 'no units'; } if (\count($denominators) === 1) { return $denominators[0] . '^-1'; } return '(' . implode('*', $denominators) . ')^-1'; } return implode('*', $numerators) . (\count($denominators) ? '/' . implode('*', $denominators) : ''); } }