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<?php
/**
* @private
* @see less-2.5.3.js#Dimension.prototype
*/
class Less_Tree_Dimension extends Less_Tree implements Less_Tree_HasValueProperty {
/** @var float */
public $value;
public $unit;
public function __construct( $value, $unit = null ) {
$this->value = floatval( $value );
if ( $unit instanceof Less_Tree_Unit ) {
$this->unit = $unit;
} elseif ( $unit ) {
$this->unit = new Less_Tree_Unit( [ $unit ] );
} else {
$this->unit = new Less_Tree_Unit();
}
}
public function accept( $visitor ) {
$this->unit = $visitor->visitObj( $this->unit );
}
public function toColor() {
return new Less_Tree_Color( [ $this->value, $this->value, $this->value ] );
}
/**
* @see Less_Tree::genCSS
*/
public function genCSS( $output ) {
if ( Less_Parser::$options['strictUnits'] && !$this->unit->isSingular() ) {
throw new Less_Exception_Compiler( "Multiple units in dimension. Correct the units or use the unit function. Bad unit: " . $this->unit->toString() );
}
$value = $this->fround( $this->value );
$strValue = (string)$value;
if ( $value !== 0 && $value < 0.000001 && $value > -0.000001 ) {
// would be output 1e-6 etc.
$strValue = number_format( (float)$strValue, 10 );
$strValue = preg_replace( '/\.?0+$/', '', $strValue );
}
if ( Less_Parser::$options['compress'] ) {
// Zero values doesn't need a unit
if ( $value === 0 && $this->unit->isLength() ) {
$output->add( $strValue );
return;
}
// Float values doesn't need a leading zero
if ( $value > 0 && $value < 1 && $strValue[0] === '0' ) {
$strValue = substr( $strValue, 1 );
}
}
$output->add( $strValue );
$this->unit->genCSS( $output );
}
public function __toString() {
return $this->toCSS();
}
// In an operation between two Dimensions,
// we default to the first Dimension's unit,
// so `1px + 2em` will yield `3px`.
/**
* @param string $op
* @param self $other
*/
public function operate( $op, $other ) {
$value = $this->_operate( $op, $this->value, $other->value );
$unit = $this->unit->clone();
if ( $op === '+' || $op === '-' ) {
if ( !$unit->numerator && !$unit->denominator ) {
$unit = $other->unit->clone();
if ( $this->unit->backupUnit ) {
$unit->backupUnit = $this->unit->backupUnit;
}
} elseif ( !$other->unit->numerator && !$other->unit->denominator ) {
// do nothing
} else {
$other = $other->convertTo( $this->unit->usedUnits() );
if ( Less_Parser::$options['strictUnits'] && $other->unit->toString() !== $unit->toCSS() ) {
throw new Less_Exception_Compiler( "Incompatible units. Change the units or use the unit function. Bad units: '" . $unit->toString() . "' and " . $other->unit->toString() . "'." );
}
$value = $this->_operate( $op, $this->value, $other->value );
}
} elseif ( $op === '*' ) {
$unit->numerator = array_merge( $unit->numerator, $other->unit->numerator );
$unit->denominator = array_merge( $unit->denominator, $other->unit->denominator );
sort( $unit->numerator );
sort( $unit->denominator );
$unit->cancel();
} elseif ( $op === '/' ) {
$unit->numerator = array_merge( $unit->numerator, $other->unit->denominator );
$unit->denominator = array_merge( $unit->denominator, $other->unit->numerator );
sort( $unit->numerator );
sort( $unit->denominator );
$unit->cancel();
}
return new self( $value, $unit );
}
/**
* @param Less_Tree $other
* @return int|null
* @see less-2.5.3.js#Dimension.prototype.compare
*/
public function compare( $other ) {
if ( !$other instanceof self ) {
return null;
}
if ( $this->unit->isEmpty() || $other->unit->isEmpty() ) {
$a = $this;
$b = $other;
} else {
$a = $this->unify();
$b = $other->unify();
if ( $a->unit->compare( $b->unit ) !== 0 ) {
return null;
}
}
return Less_Tree::numericCompare( $a->value, $b->value );
}
public function unify() {
return $this->convertTo( [ 'length' => 'px', 'duration' => 's', 'angle' => 'rad' ] );
}
public function convertTo( $conversions ) {
$value = $this->value;
$unit = $this->unit->clone();
if ( is_string( $conversions ) ) {
$derivedConversions = [];
foreach ( Less_Tree_UnitConversions::$groups as $i ) {
if ( isset( Less_Tree_UnitConversions::${$i}[$conversions] ) ) {
$derivedConversions = [ $i => $conversions ];
}
}
$conversions = $derivedConversions;
}
foreach ( $conversions as $groupName => $targetUnit ) {
$group = Less_Tree_UnitConversions::${$groupName};
// numerator
foreach ( $unit->numerator as $i => $atomicUnit ) {
$atomicUnit = $unit->numerator[$i];
if ( !isset( $group[$atomicUnit] ) ) {
continue;
}
$value *= $group[$atomicUnit] / $group[$targetUnit];
$unit->numerator[$i] = $targetUnit;
}
// denominator
foreach ( $unit->denominator as $i => $atomicUnit ) {
$atomicUnit = $unit->denominator[$i];
if ( !isset( $group[$atomicUnit] ) ) {
continue;
}
$value /= $group[$atomicUnit] / $group[$targetUnit];
$unit->denominator[$i] = $targetUnit;
}
}
$unit->cancel();
return new self( $value, $unit );
}
}
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