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<?php
/**
* @private
*/
class Less_Tree_Unit extends Less_Tree {
public $numerator = [];
public $denominator = [];
public $backupUnit;
public function __construct( $numerator = [], $denominator = [], $backupUnit = null ) {
$this->numerator = $numerator;
$this->denominator = $denominator;
$this->backupUnit = $backupUnit;
}
public function __clone() {
}
/**
* @see Less_Tree::genCSS
*/
public function genCSS( $output ) {
if ( $this->numerator ) {
$output->add( $this->numerator[0] );
} elseif ( $this->denominator ) {
$output->add( $this->denominator[0] );
} elseif ( !Less_Parser::$options['strictUnits'] && $this->backupUnit ) {
$output->add( $this->backupUnit );
}
}
public function toString() {
$returnStr = implode( '*', $this->numerator );
foreach ( $this->denominator as $d ) {
$returnStr .= '/' . $d;
}
return $returnStr;
}
public function __toString() {
return $this->toString();
}
/**
* @param self $other
*/
public function compare( $other ) {
return $this->is( $other->toString() ) ? 0 : -1;
}
public function is( $unitString ) {
return strtoupper( $this->toString() ) === strtoupper( $unitString );
}
public function isLength() {
$css = $this->toCSS();
return (bool)preg_match( '/px|em|%|in|cm|mm|pc|pt|ex/', $css );
}
public function isAngle() {
return isset( Less_Tree_UnitConversions::$angle[$this->toCSS()] );
}
public function isEmpty() {
return !$this->numerator && !$this->denominator;
}
public function isSingular() {
return count( $this->numerator ) <= 1 && !$this->denominator;
}
public function usedUnits() {
$result = [];
foreach ( Less_Tree_UnitConversions::$groups as $groupName ) {
$group = Less_Tree_UnitConversions::${$groupName};
foreach ( $this->numerator as $atomicUnit ) {
if ( isset( $group[$atomicUnit] ) && !isset( $result[$groupName] ) ) {
$result[$groupName] = $atomicUnit;
}
}
foreach ( $this->denominator as $atomicUnit ) {
if ( isset( $group[$atomicUnit] ) && !isset( $result[$groupName] ) ) {
$result[$groupName] = $atomicUnit;
}
}
}
return $result;
}
public function cancel() {
$counter = [];
$backup = null;
foreach ( $this->numerator as $atomicUnit ) {
if ( !$backup ) {
$backup = $atomicUnit;
}
$counter[$atomicUnit] = ( $counter[$atomicUnit] ?? 0 ) + 1;
}
foreach ( $this->denominator as $atomicUnit ) {
if ( !$backup ) {
$backup = $atomicUnit;
}
$counter[$atomicUnit] = ( $counter[$atomicUnit] ?? 0 ) - 1;
}
$this->numerator = [];
$this->denominator = [];
foreach ( $counter as $atomicUnit => $count ) {
if ( $count > 0 ) {
for ( $i = 0; $i < $count; $i++ ) {
$this->numerator[] = $atomicUnit;
}
} elseif ( $count < 0 ) {
for ( $i = 0; $i < -$count; $i++ ) {
$this->denominator[] = $atomicUnit;
}
}
}
if ( !$this->numerator && !$this->denominator && $backup ) {
$this->backupUnit = $backup;
}
sort( $this->numerator );
sort( $this->denominator );
}
}
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