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-rw-r--r--lib/less.php/Tree/Dimension.php201
1 files changed, 201 insertions, 0 deletions
diff --git a/lib/less.php/Tree/Dimension.php b/lib/less.php/Tree/Dimension.php
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+++ b/lib/less.php/Tree/Dimension.php
@@ -0,0 +1,201 @@
+<?php
+
+/**
+ * Dimension
+ *
+ * @package Less
+ * @subpackage tree
+ */
+class Less_Tree_Dimension extends Less_Tree{
+
+ public $value;
+ public $unit;
+ public $type = 'Dimension';
+
+ public function __construct($value, $unit = null){
+ $this->value = floatval($value);
+
+ if( $unit && ($unit instanceof Less_Tree_Unit) ){
+ $this->unit = $unit;
+ }elseif( $unit ){
+ $this->unit = new Less_Tree_Unit( array($unit) );
+ }else{
+ $this->unit = new Less_Tree_Unit( );
+ }
+ }
+
+ public function accept( $visitor ){
+ $this->unit = $visitor->visitObj( $this->unit );
+ }
+
+ public function compile(){
+ return $this;
+ }
+
+ public function toColor() {
+ return new Less_Tree_Color(array($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 = Less_Functions::fround( $this->value );
+ $strValue = (string)$value;
+
+ if( $value !== 0 && $value < 0.000001 && $value > -0.000001 ){
+ // would be output 1e-6 etc.
+ $strValue = number_format($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 $strValue;
+ }
+
+ // 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
+ */
+ public function operate( $op, $other){
+
+ $value = Less_Functions::operate( $op, $this->value, $other->value);
+ $unit = clone $this->unit;
+
+ if( $op === '+' || $op === '-' ){
+
+ if( !$unit->numerator && !$unit->denominator ){
+ $unit->numerator = $other->unit->numerator;
+ $unit->denominator = $other->unit->denominator;
+ }elseif( !$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 = Less_Functions::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 Less_Tree_Dimension( $value, $unit);
+ }
+
+ public function compare($other) {
+ if ($other instanceof Less_Tree_Dimension) {
+
+ 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 -1;
+ }
+ }
+ $aValue = $a->value;
+ $bValue = $b->value;
+
+ if ($bValue > $aValue) {
+ return -1;
+ } elseif ($bValue < $aValue) {
+ return 1;
+ } else {
+ return 0;
+ }
+ } else {
+ return -1;
+ }
+ }
+
+ public function unify() {
+ return $this->convertTo(array('length'=> 'px', 'duration'=> 's', 'angle' => 'rad' ));
+ }
+
+ public function convertTo($conversions) {
+ $value = $this->value;
+ $unit = clone $this->unit;
+
+ if( is_string($conversions) ){
+ $derivedConversions = array();
+ foreach( Less_Tree_UnitConversions::$groups as $i ){
+ if( isset(Less_Tree_UnitConversions::${$i}[$conversions]) ){
+ $derivedConversions = array( $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 = $value * ($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 = $value / ($group[$atomicUnit] / $group[$targetUnit]);
+
+ $unit->denominator[$i] = $targetUnit;
+ }
+ }
+
+ $unit->cancel();
+
+ return new Less_Tree_Dimension( $value, $unit);
+ }
+}