function.js 2.2 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128
  1. /*!
  2. * Stylus - Function
  3. * Copyright (c) Automattic <developer.wordpress.com>
  4. * MIT Licensed
  5. */
  6. /**
  7. * Module dependencies.
  8. */
  9. var Node = require('./node');
  10. /**
  11. * Initialize a new `Function` with `name`, `params`, and `body`.
  12. *
  13. * @param {String} name
  14. * @param {Params|Function} params
  15. * @param {Block} body
  16. * @api public
  17. */
  18. var Function = module.exports = function Function(name, params, body){
  19. Node.call(this);
  20. this.name = name;
  21. this.params = params;
  22. this.block = body;
  23. if ('function' == typeof params) this.fn = params;
  24. };
  25. /**
  26. * Check function arity.
  27. *
  28. * @return {Boolean}
  29. * @api public
  30. */
  31. Function.prototype.__defineGetter__('arity', function(){
  32. return this.params.length;
  33. });
  34. /**
  35. * Inherit from `Node.prototype`.
  36. */
  37. Function.prototype.__proto__ = Node.prototype;
  38. /**
  39. * Return hash.
  40. *
  41. * @return {String}
  42. * @api public
  43. */
  44. Function.prototype.__defineGetter__('hash', function(){
  45. return 'function ' + this.name;
  46. });
  47. /**
  48. * Return a clone of this node.
  49. *
  50. * @return {Node}
  51. * @api public
  52. */
  53. Function.prototype.clone = function(parent){
  54. if (this.fn) {
  55. var clone = new Function(
  56. this.name
  57. , this.fn);
  58. } else {
  59. var clone = new Function(this.name);
  60. clone.params = this.params.clone(parent, clone);
  61. clone.block = this.block.clone(parent, clone);
  62. }
  63. clone.lineno = this.lineno;
  64. clone.column = this.column;
  65. clone.filename = this.filename;
  66. return clone;
  67. };
  68. /**
  69. * Return <name>(param1, param2, ...).
  70. *
  71. * @return {String}
  72. * @api public
  73. */
  74. Function.prototype.toString = function(){
  75. if (this.fn) {
  76. return this.name
  77. + '('
  78. + this.fn.toString()
  79. .match(/^function *\w*\((.*?)\)/)
  80. .slice(1)
  81. .join(', ')
  82. + ')';
  83. } else {
  84. return this.name
  85. + '('
  86. + this.params.nodes.join(', ')
  87. + ')';
  88. }
  89. };
  90. /**
  91. * Return a JSON representation of this node.
  92. *
  93. * @return {Object}
  94. * @api public
  95. */
  96. Function.prototype.toJSON = function(){
  97. var json = {
  98. __type: 'Function',
  99. name: this.name,
  100. lineno: this.lineno,
  101. column: this.column,
  102. filename: this.filename
  103. };
  104. if (this.fn) {
  105. json.fn = this.fn;
  106. } else {
  107. json.params = this.params;
  108. json.block = this.block;
  109. }
  110. return json;
  111. };