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<?php
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namespace Sabberworm\CSS\Property;
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use Sabberworm\CSS\Comment\Comment;
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use Sabberworm\CSS\OutputFormat;
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/**
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 * `CSSNamespace` represents an `@namespace` rule.
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 */
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class CSSNamespace implements AtRule
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{
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    /**
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     * @var string
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     */
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    private $mUrl;
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    /**
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     * @var string
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     */
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    private $sPrefix;
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    /**
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     * @var int
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     */
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    private $iLineNo;
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    /**
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     * @var array<array-key, Comment>
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     */
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    protected $aComments;
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    /**
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     * @param string $mUrl
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     * @param string|null $sPrefix
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     * @param int $iLineNo
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     */
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    public function __construct($mUrl, $sPrefix = null, $iLineNo = 0)
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    {
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        $this->mUrl = $mUrl;
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        $this->sPrefix = $sPrefix;
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        $this->iLineNo = $iLineNo;
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        $this->aComments = [];
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    }
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    /**
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     * @return int
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     */
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    public function getLineNo()
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    {
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        return $this->iLineNo;
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    }
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    /**
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     * @return string
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     */
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    public function __toString()
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    {
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        return $this->render(new OutputFormat());
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    }
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    /**
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     * @return string
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     */
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    public function render(OutputFormat $oOutputFormat)
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    {
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        return '@namespace ' . ($this->sPrefix === null ? '' : $this->sPrefix . ' ')
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            . $this->mUrl->render($oOutputFormat) . ';';
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    }
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    /**
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     * @return string
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     */
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    public function getUrl()
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    {
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        return $this->mUrl;
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    }
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    /**
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     * @return string|null
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     */
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    public function getPrefix()
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    {
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        return $this->sPrefix;
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    }
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    /**
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     * @param string $mUrl
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     *
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     * @return void
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     */
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    public function setUrl($mUrl)
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    {
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        $this->mUrl = $mUrl;
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    }
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    /**
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     * @param string $sPrefix
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     *
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     * @return void
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     */
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    public function setPrefix($sPrefix)
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    {
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        $this->sPrefix = $sPrefix;
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    }
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    /**
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     * @return string
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     */
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    public function atRuleName()
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    {
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        return 'namespace';
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    }
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    /**
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     * @return array<int, string>
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     */
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    public function atRuleArgs()
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    {
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        $aResult = [$this->mUrl];
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        if ($this->sPrefix) {
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            array_unshift($aResult, $this->sPrefix);
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        }
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        return $aResult;
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    }
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    /**
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     * @param array<array-key, Comment> $aComments
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     *
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     * @return void
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     */
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    public function addComments(array $aComments)
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    {
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        $this->aComments = array_merge($this->aComments, $aComments);
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    }
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    /**
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     * @return array<array-key, Comment>
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     */
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    public function getComments()
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    {
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        return $this->aComments;
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    }
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    /**
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     * @param array<array-key, Comment> $aComments
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     *
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     * @return void
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     */
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    public function setComments(array $aComments)
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    {
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        $this->aComments = $aComments;
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    }
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}