Vanderlee\Comprehend\Core\Context\SpacingContextTrait

Complexity

Total Complexity

9

Size/Duplication

Total Lines	41
Duplicated Lines	0 %

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	popSpacer()	0	3	1
A	skipSpacing()	0	17	5
A	pushSpacer()	0	3	3

<?php


namespace Vanderlee\Comprehend\Core\Context;


use Vanderlee\Comprehend\Core\ArgumentsTrait;

use Vanderlee\Comprehend\Parser\Parser;


trait SpacingContextTrait

{

    use ArgumentsTrait;


    /**

     * List of spacers.

     *  -  Parser for a normal spacer.

     *  -  `null` to disable spacing.

     *  -  `true` to use the top-most spacer.

     *

     * @var Parser[]|null[]|bool[]

     */

    private $spacers = [];


    public function pushSpacer($skipper = null)

    {

        $this->spacers[] = ($skipper === null || $skipper === true) ? $skipper : $this->getArgument($skipper);

    }


    public function popSpacer()

    {

        array_pop($this->spacers);

    }


    public function skipSpacing($in, $offset)

    {

        $spacer = end($this->spacers);


        // If `true`; use top-most Parser instance in stack.

        if ($spacer === true) {

            do {

                $spacer = prev($this->spacers);

            } while ($spacer !== false && !($spacer instanceof Parser));

        }


        if ($spacer instanceof Parser) {

            $match = $spacer->match($in, $offset);

            return $match->match ? $match->length : false;

        }


        return 0;

    }

}