MDL-55224 core: Import PHP-CSS-Parser into core

Part of MDL-55071

lib/php-css-parser/Property/CSSNamespace.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace Sabberworm\CSS\Property;
+
+/**
+* CSSNamespace represents an @namespace rule.
+*/
+class CSSNamespace implements AtRule {
+	private $mUrl;
+	private $sPrefix;
+	private $iLineNo;
+	protected $aComments;
+	
+	public function __construct($mUrl, $sPrefix = null, $iLineNo = 0) {
+		$this->mUrl = $mUrl;
+		$this->sPrefix = $sPrefix;
+		$this->iLineNo = $iLineNo;
+		$this->aComments = array();
+	}
+
+	/**
+	 * @return int
+	 */
+	public function getLineNo() {
+		return $this->iLineNo;
+	}
+
+	public function __toString() {
+		return $this->render(new \Sabberworm\CSS\OutputFormat());
+	}
+
+	public function render(\Sabberworm\CSS\OutputFormat $oOutputFormat) {
+		return '@namespace '.($this->sPrefix === null ? '' : $this->sPrefix.' ').$this->mUrl->render($oOutputFormat).';';
+	}
+	
+	public function getUrl() {
+		return $this->mUrl;
+	}
+
+	public function getPrefix() {
+		return $this->sPrefix;
+	}
+
+	public function setUrl($mUrl) {
+		$this->mUrl = $mUrl;
+	}
+
+	public function setPrefix($sPrefix) {
+		$this->sPrefix = $sPrefix;
+	}
+
+	public function atRuleName() {
+		return 'namespace';
+	}
+
+	public function atRuleArgs() {
+		$aResult = array($this->mUrl);
+		if($this->sPrefix) {
+			array_unshift($aResult, $this->sPrefix);
+		}
+		return $aResult;
+	}
+
+	public function addComments(array $aComments) {
+		$this->aComments = array_merge($this->aComments, $aComments);
+	}
+
+	public function getComments() {
+		return $this->aComments;
+	}
+
+	public function setComments(array $aComments) {
+		$this->aComments = $aComments;
+	}
+}