File "Number.php"
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<?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, \JsonSerializable
{
const PRECISION = 10;
/**
* @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 int|float
*/
private $dimension;
/**
* @var string[]
* @phpstan-var list<string>
*/
private $numeratorUnits;
/**
* @var string[]
* @phpstan-var list<string>
*/
private $denominatorUnits;
/**
* Initialize number
*
* @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 list<string>
*/
public function getNumeratorUnits()
{
return $this->numeratorUnits;
}
/**
* @return list<string>
*/
public function getDenominatorUnits()
{
return $this->denominatorUnits;
}
/**
* @return mixed
*/
#[\ReturnTypeWillChange]
public function jsonSerialize()
{
// Passing a compiler instance makes the method output a Sass representation instead of a CSS one, supporting full units.
return $this->output(new Compiler());
}
/**
* @return bool
*/
#[\ReturnTypeWillChange]
public function offsetExists($offset)
{
if ($offset === -3) {
return ! \is_null($this->sourceColumn);
}
if ($offset === -2) {
return ! \is_null($this->sourceLine);
}
if (
$offset === -1 ||
$offset === 0 ||
$offset === 1 ||
$offset === 2
) {
return true;
}
return false;
}
/**
* @return mixed
*/
#[\ReturnTypeWillChange]
public function offsetGet($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' => $this->denominatorUnits);
}
}
/**
* @return void
*/
#[\ReturnTypeWillChange]
public function offsetSet($offset, $value)
{
throw new \BadMethodCallException('Number is immutable');
}
/**
* @return void
*/
#[\ReturnTypeWillChange]
public function offsetUnset($offset)
{
throw new \BadMethodCallException('Number is immutable');
}
/**
* Returns true if the number is unitless
*
* @return bool
*/
public function unitless()
{
return \count($this->numeratorUnits) === 0 && \count($this->denominatorUnits) === 0;
}
/**
* Returns true if the number has any units
*
* @return bool
*/
public function hasUnits()
{
return !$this->unitless();
}
/**
* Checks whether the number has exactly this unit
*
* @param string $unit
*
* @return bool
*/
public function hasUnit($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 float|int $max
* @param string|null $name
*
* @return float|int
* @throws SassScriptException
*/
public function valueInRange($min, $max, $name = null)
{
try {
return Util::checkRange('', new Range($min, $max), $this);
} 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 float|int $min
* @param float|int $max
* @param string $name
* @param string $unit
*
* @return float|int
* @throws SassScriptException
*
* @internal
*/
public function valueInRangeWithUnit($min, $max, $name, $unit)
{
try {
return Util::checkRange('', new Range($min, $max), $this);
} catch (RangeException $e) {
throw SassScriptException::forArgument(sprintf('Expected %s to be within %s%s and %s%3$s.', $this, $min, $unit, $max), $name);
}
}
/**
* @param string|null $varName
*
* @return void
*/
public function assertNoUnits($varName = null)
{
if ($this->unitless()) {
return;
}
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);
}
/**
* @param Number $other
*
* @return void
*/
public function assertSameUnitOrUnitless(Number $other)
{
if ($other->unitless()) {
return;
}
if ($this->numeratorUnits === $other->numeratorUnits && $this->denominatorUnits === $other->denominatorUnits) {
return;
}
throw new SassScriptException(sprintf(
'Incompatible units %s and %s.',
self::getUnitString($this->numeratorUnits, $this->denominatorUnits),
self::getUnitString($other->numeratorUnits, $other->denominatorUnits)
));
}
/**
* Returns a copy of this number, converted to the units represented by $newNumeratorUnits and $newDenominatorUnits.
*
* This does not throw an error if this number is unitless and
* $newNumeratorUnits/$newDenominatorUnits are not empty, or vice versa. Instead,
* it treats all unitless numbers as convertible to and from all units without
* changing the value.
*
* @param string[] $newNumeratorUnits
* @param string[] $newDenominatorUnits
*
* @return Number
*
* @phpstan-param list<string> $newNumeratorUnits
* @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 $newDenominatorUnits)
{
return new Number($this->valueInUnits($newNumeratorUnits, $newDenominatorUnits), $newNumeratorUnits, $newDenominatorUnits);
}
/**
* @param Number $other
*
* @return bool
*/
public function isComparableTo(Number $other)
{
if ($this->unitless() || $other->unitless()) {
return true;
}
try {
$this->greaterThan($other);
return true;
} catch (SassScriptException $e) {
return false;
}
}
/**
* @param Number $other
*
* @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) : '');
}
}