stylus/lib/nodes/property.js

Robust, expressive, and feature-rich CSS superset

/*!
 * Stylus - Property
 * Copyright (c) Automattic <developer.wordpress.com>
 * MIT Licensed
 */

/**
 * Module dependencies.
 */

var Node = require('./node');

module.exports = class Property extends Node {
  /**
   * Initialize a new `Property` with the given `segs` and optional `expr`.
   *
   * @param {Array} segs
   * @param {Expression} expr
   * @api public
   */

  constructor(segs, expr) {
    super();
    this.segments = segs;
    this.expr = expr;
  }

  /**
   * Return a clone of this node.
   * 
   * @return {Node}
   * @api public
   */

  clone(parent) {
    var clone = new Property(this.segments);
    clone.name = this.name;
    if (this.literal) clone.literal = this.literal;
    clone.lineno = this.lineno;
    clone.column = this.column;
    clone.filename = this.filename;
    clone.segments = this.segments.map(function (node) { return node.clone(parent, clone); });
    if (this.expr) clone.expr = this.expr.clone(parent, clone);
    return clone;
  };

  /**
   * Return a JSON representation of this node.
   *
   * @return {Object}
   * @api public
   */

  toJSON() {
    var json = {
      __type: 'Property',
      segments: this.segments,
      name: this.name,
      lineno: this.lineno,
      column: this.column,
      filename: this.filename
    };
    if (this.expr) json.expr = this.expr;
    if (this.literal) json.literal = this.literal;
    return json;
  };

  /**
   * Return string representation of this node.
   *
   * @return {String}
   * @api public
   */

  toString() {
    return 'property(' + this.segments.join('') + ', ' + this.expr + ')';
  };

  /**
   * Operate on the property expression.
   *
   * @param {String} op
   * @param {Node} right
   * @return {Node}
   * @api public
   */

  operate(op, right, val) {
    return this.expr.operate(op, right, val);
  };
};