137 lines
2.5 KiB
JavaScript
Executable file
137 lines
2.5 KiB
JavaScript
Executable file
/*!
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* Stylus - at-rule
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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 at-rule node.
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*
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* @param {String} type
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* @api public
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*/
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var Atrule = module.exports = function Atrule(type){
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Node.call(this);
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this.type = type;
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};
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/**
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* Inherit from `Node.prototype`.
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*/
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Atrule.prototype.__proto__ = Node.prototype;
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/**
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* Check if at-rule's block has only properties.
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*
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* @return {Boolean}
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* @api public
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*/
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Atrule.prototype.__defineGetter__('hasOnlyProperties', function(){
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if (!this.block) return false;
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var nodes = this.block.nodes;
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for (var i = 0, len = nodes.length; i < len; ++i) {
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var nodeName = nodes[i].nodeName;
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switch(nodes[i].nodeName) {
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case 'property':
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case 'expression':
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case 'comment':
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continue;
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default:
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return false;
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}
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}
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return true;
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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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Atrule.prototype.clone = function(parent){
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var clone = new Atrule(this.type);
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if (this.block) clone.block = this.block.clone(parent, clone);
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clone.segments = this.segments.map(function(node){ return node.clone(parent, clone); });
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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 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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Atrule.prototype.toJSON = function(){
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var json = {
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__type: 'Atrule',
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type: this.type,
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segments: this.segments,
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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.block) json.block = this.block;
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return json;
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};
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/**
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* Return @<type>.
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*
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* @return {String}
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* @api public
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*/
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Atrule.prototype.toString = function(){
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return '@' + this.type;
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};
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/**
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* Check if the at-rule's block has output nodes.
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*
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* @return {Boolean}
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* @api public
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*/
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Atrule.prototype.__defineGetter__('hasOutput', function(){
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return !!this.block && hasOutput(this.block);
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});
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function hasOutput(block) {
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var nodes = block.nodes;
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// only placeholder selectors
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if (nodes.every(function(node){
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return 'group' == node.nodeName && node.hasOnlyPlaceholders;
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})) return false;
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// something visible
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return nodes.some(function(node) {
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switch (node.nodeName) {
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case 'property':
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case 'literal':
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case 'import':
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return true;
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case 'block':
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return hasOutput(node);
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default:
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if (node.block) return hasOutput(node.block);
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}
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});
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}
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