156 lines
2.7 KiB
JavaScript
156 lines
2.7 KiB
JavaScript
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/*!
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* Stylus - Ident
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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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, nodes = require('./');
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/**
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* Initialize a new `Ident` by `name` with the given `val` node.
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*
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* @param {String} name
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* @param {Node} val
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* @api public
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*/
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var Ident = module.exports = function Ident(name, val, mixin){
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Node.call(this);
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this.name = name;
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this.string = name;
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this.val = val || nodes.null;
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this.mixin = !!mixin;
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};
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/**
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* Check if the variable has a value.
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*
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* @return {Boolean}
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* @api public
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*/
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Ident.prototype.__defineGetter__('isEmpty', function(){
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return undefined == this.val;
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});
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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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Ident.prototype.__defineGetter__('hash', function(){
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return this.name;
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});
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/**
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* Inherit from `Node.prototype`.
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*/
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Ident.prototype.__proto__ = Node.prototype;
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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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Ident.prototype.clone = function(parent){
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var clone = new Ident(this.name);
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clone.val = this.val.clone(parent, clone);
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clone.mixin = this.mixin;
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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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clone.property = this.property;
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clone.rest = this.rest;
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return clone;
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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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Ident.prototype.toJSON = function(){
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return {
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__type: 'Ident',
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name: this.name,
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val: this.val,
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mixin: this.mixin,
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property: this.property,
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rest: this.rest,
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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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};
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/**
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* Return <name>.
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*
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* @return {String}
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* @api public
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*/
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Ident.prototype.toString = function(){
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return this.name;
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};
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/**
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* Coerce `other` to an ident.
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*
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* @param {Node} other
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* @return {String}
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* @api public
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*/
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Ident.prototype.coerce = function(other){
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switch (other.nodeName) {
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case 'ident':
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case 'string':
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case 'literal':
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return new Ident(other.string);
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case 'unit':
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return new Ident(other.toString());
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default:
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return Node.prototype.coerce.call(this, other);
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}
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};
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/**
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* Operate on `right` with the given `op`.
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*
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* @param {String} op
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* @param {Node} right
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* @return {Node}
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* @api public
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*/
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Ident.prototype.operate = function(op, right){
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var val = right.first;
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switch (op) {
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case '-':
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if ('unit' == val.nodeName) {
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var expr = new nodes.Expression;
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val = val.clone();
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val.val = -val.val;
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expr.push(this);
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expr.push(val);
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return expr;
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}
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case '+':
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return new nodes.Ident(this.string + this.coerce(val).string);
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}
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return Node.prototype.operate.call(this, op, right);
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};
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