129 lines
2.2 KiB
JavaScript
129 lines
2.2 KiB
JavaScript
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/*!
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* Stylus - Function
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* Copyright (c) Automattic <developer.wordpress.com>
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* MIT Licensed
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*/
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/**
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* Module dependencies.
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*/
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var Node = require('./node');
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/**
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* Initialize a new `Function` with `name`, `params`, and `body`.
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*
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* @param {String} name
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* @param {Params|Function} params
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* @param {Block} body
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* @api public
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*/
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var Function = module.exports = function Function(name, params, body){
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Node.call(this);
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this.name = name;
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this.params = params;
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this.block = body;
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if ('function' == typeof params) this.fn = params;
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};
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/**
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* Check function arity.
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*
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* @return {Boolean}
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* @api public
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*/
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Function.prototype.__defineGetter__('arity', function(){
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return this.params.length;
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});
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/**
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* Inherit from `Node.prototype`.
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*/
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Function.prototype.__proto__ = Node.prototype;
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/**
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* Return hash.
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*
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* @return {String}
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* @api public
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*/
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Function.prototype.__defineGetter__('hash', function(){
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return 'function ' + this.name;
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});
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/**
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* Return a clone of this node.
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*
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* @return {Node}
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* @api public
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*/
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Function.prototype.clone = function(parent){
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if (this.fn) {
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var clone = new Function(
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this.name
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, this.fn);
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} else {
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var clone = new Function(this.name);
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clone.params = this.params.clone(parent, clone);
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clone.block = this.block.clone(parent, clone);
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}
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clone.lineno = this.lineno;
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clone.column = this.column;
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clone.filename = this.filename;
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return clone;
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};
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/**
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* Return <name>(param1, param2, ...).
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*
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* @return {String}
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* @api public
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*/
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Function.prototype.toString = function(){
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if (this.fn) {
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return this.name
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+ '('
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+ this.fn.toString()
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.match(/^function *\w*\((.*?)\)/)
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.slice(1)
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.join(', ')
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+ ')';
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} else {
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return this.name
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+ '('
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+ this.params.nodes.join(', ')
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+ ')';
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}
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};
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/**
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* Return a JSON representation of this node.
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*
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* @return {Object}
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* @api public
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*/
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Function.prototype.toJSON = function(){
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var json = {
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__type: 'Function',
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name: this.name,
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lineno: this.lineno,
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column: this.column,
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filename: this.filename
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};
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if (this.fn) {
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json.fn = this.fn;
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} else {
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json.params = this.params;
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json.block = this.block;
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}
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return json;
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};
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