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node_modules/stylus/lib/nodes/group.js 1.86 KB
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  /*!
   * Stylus - Group
   * Copyright (c) Automattic <developer.wordpress.com>
   * MIT Licensed
   */
  
  /**
   * Module dependencies.
   */
  
  var Node = require('./node');
  
  /**
   * Initialize a new `Group`.
   *
   * @api public
   */
  
  var Group = module.exports = function Group(){
    Node.call(this);
    this.nodes = [];
    this.extends = [];
  };
  
  /**
   * Inherit from `Node.prototype`.
   */
  
  Group.prototype.__proto__ = Node.prototype;
  
  /**
   * Push the given `selector` node.
   *
   * @param {Selector} selector
   * @api public
   */
  
  Group.prototype.push = function(selector){
    this.nodes.push(selector);
  };
  
  /**
   * Return this set's `Block`.
   */
  
  Group.prototype.__defineGetter__('block', function(){
    return this.nodes[0].block;
  });
  
  /**
   * Assign `block` to each selector in this set.
   *
   * @param {Block} block
   * @api public
   */
  
  Group.prototype.__defineSetter__('block', function(block){
    for (var i = 0, len = this.nodes.length; i < len; ++i) {
      this.nodes[i].block = block;
    }
  });
  
  /**
   * Check if this set has only placeholders.
   *
   * @return {Boolean}
   * @api public
   */
  
  Group.prototype.__defineGetter__('hasOnlyPlaceholders', function(){
    return this.nodes.every(function(selector) { return selector.isPlaceholder; });
  });
  
  /**
   * Return a clone of this node.
   * 
   * @return {Node}
   * @api public
   */
  
  Group.prototype.clone = function(parent){
    var clone = new Group;
    clone.lineno = this.lineno;
    clone.column = this.column;
    this.nodes.forEach(function(node){
      clone.push(node.clone(parent, clone));
    });
    clone.filename = this.filename;
    clone.block = this.block.clone(parent, clone);
    return clone;
  };
  
  /**
   * Return a JSON representation of this node.
   *
   * @return {Object}
   * @api public
   */
  
  Group.prototype.toJSON = function(){
    return {
      __type: 'Group',
      nodes: this.nodes,
      block: this.block,
      lineno: this.lineno,
      column: this.column,
      filename: this.filename
    };
  };