class SassIfNode in Sassy 7.3

SassIfNode class. Represents Sass If, Else If and Else statements. Else If and Else statement nodes are chained below the If statement node. @package PHamlP @subpackage Sass.tree

Hierarchy

• class \SassNode
  • class \SassIfNode

File

phpsass/tree/SassIfNode.php, line 19

class SassIfNode extends SassNode {
  const MATCH_IF = '/^@if\\s+(.+)$/i';
  const MATCH_ELSE = '/@else(\\s+if\\s+(.+))?/i';
  const IF_EXPRESSION = 1;
  const ELSE_IF = 1;
  const ELSE_EXPRESSION = 2;

  /**
   * @var SassIfNode the next else node.
   */
  private $else;

  /**
   * @var string expression to evaluate
   */
  private $expression;

  /**
   * SassIfNode constructor.
   * @param object source token
   * @param boolean true for an "if" node, false for an "else if | else" node
   * @return SassIfNode
   */
  public function __construct($token, $if = true) {
    parent::__construct($token);
    if ($if) {
      preg_match(self::MATCH_IF, $token->source, $matches);
      $this->expression = $matches[SassIfNode::IF_EXPRESSION];
    }
    else {
      preg_match(self::MATCH_ELSE, $token->source, $matches);
      $this->expression = sizeof($matches) == 1 ? null : $matches[SassIfNode::ELSE_EXPRESSION];
    }
  }

  /**
   * Adds an "else" statement to this node.
   * @param SassIfNode "else" statement node to add
   * @return SassIfNode this node
   */
  public function addElse($node) {
    if (is_null($this->else)) {
      $node->parent = $this;
      $node->root = $this->root;
      $this->else = $node;
    }
    else {
      $this->else
        ->addElse($node);
    }
    return $this;
  }

  /**
   * Parse this node.
   * @param SassContext the context in which this node is parsed
   * @return array parsed child nodes
   */
  public function parse($context) {
    if ($this
      ->isElse() || $this
      ->evaluate($this->expression, $context)
      ->toBoolean()) {
      $children = $this
        ->parseChildren($context);
    }
    elseif (!empty($this->else)) {
      $children = $this->else
        ->parse($context);
    }
    else {
      $children = array();
    }
    return $children;
  }

  /**
   * Returns a value indicating if this node is an "else" node.
   * @return true if this node is an "else" node, false if this node is an "if"
   * or "else if" node
   */
  private function isElse() {
    return $this->expression == '';
  }

}

Members

Name	Modifiers	Type	Description	Overrides
SassIfNode::$else	private	property
SassIfNode::$expression	private	property
SassIfNode::addElse	public	function	Adds an "else" statement to this node.
SassIfNode::ELSE_EXPRESSION		constant
SassIfNode::ELSE_IF		constant
SassIfNode::IF_EXPRESSION		constant
SassIfNode::isElse	private	function	Returns a value indicating if this node is an "else" node.
SassIfNode::MATCH_ELSE		constant
SassIfNode::MATCH_IF		constant
SassIfNode::parse	public	function	Parse this node.
SassIfNode::__construct	public	function	SassIfNode constructor. Overrides SassNode::__construct	1
SassNode::$children	public	property
SassNode::$parent	public	property		1
SassNode::$root	public	property
SassNode::$token	public	property
SassNode::addChild	public	function	Adds a child to this node.
SassNode::addWarning	public	function	Adds a warning to the node.
SassNode::evaluate	public	function	Evaluates a SassScript expression.
SassNode::getChildren	public	function	Returns the node's children
SassNode::getDebug_info	public	function	Returns the debug_info option setting for this node
SassNode::getFilename	public	function	Returns the filename for this node
SassNode::getLastChild	public	function	Returns the last child node of this node.
SassNode::getLevel	public	function	Returns the level of this node.
SassNode::getLine	public	function	Returns the line number for this node
SassNode::getLine_numbers	public	function	Returns the line_numbers option setting for this node
SassNode::getParent	public	function	Returns the node's parent
SassNode::getParser	public	function	Returns the Sass parser.
SassNode::getPropertySyntax	public	function	Returns the property syntax being used.
SassNode::getRenderer	public	function	Returns the renderer.
SassNode::getScript	public	function	Returns the SassScript parser.
SassNode::getSource	public	function	Returns the source for this node
SassNode::getStyle	public	function	Returns the render style of the document tree.
SassNode::getVendor_properties	public	function	Returns vendor specific properties
SassNode::hasChildren	public	function	Returns a value indicating if this node has children
SassNode::hasParent	public	function	Return a value indicating if this node has a parent
SassNode::inDirective	public	function	Returns a value indicating whether this node is in a directive
SassNode::inSassScriptDirective	public	function	Returns a value indicating whether this node is in a SassScript directive
SassNode::interpolate	public	function	Replace interpolated SassScript contained in '#{}' with the parsed value.
SassNode::isa	public static	function	Returns a value indicating if the token represents this type of node.	9
SassNode::isChildOf	public	function	Returns a value indicating if this node is a child of the passed node. This just checks the levels of the nodes. If this node is at a greater level than the passed node if is a child of it.
SassNode::parseChildren	public	function	Parse the children of the node.
SassNode::__clone	public	function	Resets children when cloned
SassNode::__get	public	function	Getter.
SassNode::__set	public	function	Setter.