
/*!
 * Stylus - Literal
 * Copyright(c) 2010 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

/**
 * Module dependencies.
 */

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

/**
 * Initialize a new `Literal` with the given `str`.
 *
 * @param {String} str
 * @api public
 */

var Literal = module.exports = function Literal(str){
  Node.call(this);
  this.val = str;
  this.string = str;
  this.prefixed = false;
};

/**
 * Inherit from `Node.prototype`.
 */

Literal.prototype.__proto__ = Node.prototype;

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

Literal.prototype.__defineGetter__('hash', function(){
  return this.val;
});

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

Literal.prototype.toString = function(){
  return this.val;
};

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

Literal.prototype.coerce = function(other){
  switch (other.nodeName) {
    case 'ident':
    case 'string':
    case 'literal':
      return new Literal(other.string);
    default:
      return Node.prototype.coerce.call(this, other);
  }
};

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

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

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

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