<?php
  
  namespace Sabberworm\CSS\RuleSet;
  
  use Sabberworm\CSS\OutputFormat;
  use Sabberworm\CSS\Property\AtRule;
  
  /**
   * This class represents rule sets for generic at-rules which are not covered by specific classes, i.e., not
   * `@import`, `@charset` or `@media`.
   *
   * A common example for this is `@font-face`.
   */
  class AtRuleSet extends RuleSet implements AtRule
  {
      /**
       * @var string
       */
      private $sType;
  
      /**
       * @var string
       */
      private $sArgs;
  
      /**
       * @param string $sType
       * @param string $sArgs
       * @param int $iLineNo
       */
      public function __construct($sType, $sArgs = '', $iLineNo = 0)
      {
          parent::__construct($iLineNo);
          $this->sType = $sType;
          $this->sArgs = $sArgs;
      }
  
      /**
       * @return string
       */
      public function atRuleName()
      {
          return $this->sType;
      }
  
      /**
       * @return string
       */
      public function atRuleArgs()
      {
          return $this->sArgs;
      }
  
      /**
       * @return string
       */
      public function __toString()
      {
          return $this->render(new OutputFormat());
      }
  
      /**
       * @return string
       */
      public function render(OutputFormat $oOutputFormat)
      {
          $sResult = $oOutputFormat->comments($this);
          $sArgs = $this->sArgs;
          if ($sArgs) {
              $sArgs = ' ' . $sArgs;
          }
          $sResult .= "@{$this->sType}$sArgs{$oOutputFormat->spaceBeforeOpeningBrace()}{";
          $sResult .= $this->renderRules($oOutputFormat);
          $sResult .= '}';
          return $sResult;
      }
  }