Просмотр архива concrete5


<?php

/**
 * Unit
 *
 * @package Less
 * @subpackage tree
 */
class Less_Tree_Unit extends Less_Tree{

    var $numerator = array();
    var $denominator = array();
    public $backupUnit;
    public $type = 'Unit';

    function __construct($numerator = array(), $denominator = array(), $backupUnit = null ){
        $this->numerator = $numerator;
        $this->denominator = $denominator;
        $this->backupUnit = $backupUnit;
    }

    function __clone(){
    }

    /**
     * @see Less_Tree::genCSS
     */
    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 );
            return ;
        }
    }

    function toString(){
        $returnStr = implode('*',$this->numerator);
        foreach($this->denominator as $d){
            $returnStr .= '/'.$d;
        }
        return $returnStr;
    }

    function __toString(){
        return $this->toString();
    }


    /**
     * @param Less_Tree_Unit $other
     */
    function compare($other) {
        return $this->is( $other->toString() ) ? 0 : -1;
    }

    function is($unitString){
        return $this->toString() === $unitString;
    }

    function isLength(){
        $css = $this->toCSS();
        return !!preg_match('/px|em|%|in|cm|mm|pc|pt|ex/',$css);
    }

    function isAngle() {
        return isset( Less_Tree_UnitConversions::$angle[$this->toCSS()] );
    }

    function isEmpty(){
        return !$this->numerator && !$this->denominator;
    }

    function isSingular() {
        return count($this->numerator) <= 1 && !$this->denominator;
    }


    function usedUnits(){
        $result = array();

        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;
    }

    function cancel(){
        $counter = array();
        $backup = null;

        foreach($this->numerator as $atomicUnit){
            if( !$backup ){
                $backup = $atomicUnit;
            }
            $counter[$atomicUnit] = ( isset($counter[$atomicUnit]) ? $counter[$atomicUnit] : 0) + 1;
        }

        foreach($this->denominator as $atomicUnit){
            if( !$backup ){
                $backup = $atomicUnit;
            }
            $counter[$atomicUnit] = ( isset($counter[$atomicUnit]) ? $counter[$atomicUnit] : 0) - 1;
        }

        $this->numerator = array();
        $this->denominator = array();

        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);
    }


}