stylus/lib/nodes/literal.js

Robust, expressive, and feature-rich CSS superset

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

/**
 * Module dependencies.
 */

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

module.exports = class Literal extends Node {
  /**
   * Initialize a new `Literal` with the given `str`.
   *
   * @param {String} str
   * @api public
   */

  constructor(str) {
    super();
    this.val = str;
    this.string = str;
    this.prefixed = false;
  }

  /**
   * Return hash.
   *
   * @return {String}
   * @api public
   */

  get hash() {
    return this.val;
  };

  /**
   * Return literal value.
   *
   * @return {String}
   * @api public
   */

  toString() {
    return this.val.toString();
  };

  /**
   * Coerce `other` to a literal.
   *
   * @param {Node} other
   * @return {String}
   * @api public
   */

  coerce(other) {
    switch (other.nodeName) {
      case 'ident':
      case 'string':
      case 'literal':
        return new Literal(other.string);
      default:
        return super.coerce(other);
    }
  };

  /**
   * Operate on `right` with the given `op`.
   *
   * @param {String} op
   * @param {Node} right
   * @return {Node}
   * @api public
   */

  operate(op, right) {
    var val = right.first;
    switch (op) {
      case '+':
        return new nodes.Literal(this.string + this.coerce(val).string);
      default:
        return super.operate(op, right);
    }
  };

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

  toJSON() {
    return {
      __type: 'Literal',
      val: this.val,
      string: this.string,
      prefixed: this.prefixed,
      lineno: this.lineno,
      column: this.column,
      filename: this.filename
    };
  };

};