1 files changed, 136 insertions, 0 deletions
diff --git a/node_modules/stylus/lib/nodes/atrule.js b/node_modules/stylus/lib/nodes/atrule.js
new file mode 100644
index 00000000..43301b50
--- /dev/null
+++ b/node_modules/stylus/lib/nodes/atrule.js
@@ -0,0 +1,136 @@
+/*!
+ * Stylus - at-rule
+ * Copyright (c) Automattic <developer.wordpress.com>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node');
+
+/**
+ * Initialize a new at-rule node.
+ *
+ * @param {String} type
+ * @api public
+ */
+
+var Atrule = module.exports = function Atrule(type){
+  Node.call(this);
+  this.type = type;
+};
+
+/**
+ * Inherit from `Node.prototype`.
+ */
+
+Atrule.prototype.__proto__ = Node.prototype;
+
+/**
+ * Check if at-rule's block has only properties.
+ *
+ * @return {Boolean}
+ * @api public
+ */
+
+Atrule.prototype.__defineGetter__('hasOnlyProperties', function(){
+  if (!this.block) return false;
+
+  var nodes = this.block.nodes;
+  for (var i = 0, len = nodes.length; i < len; ++i) {
+    var nodeName = nodes[i].nodeName;
+    switch(nodes[i].nodeName) {
+      case 'property':
+      case 'expression':
+      case 'comment':
+        continue;
+      default:
+        return false;
+    }
+  }
+  return true;
+});
+
+/**
+ * Return a clone of this node.
+ *
+ * @return {Node}
+ * @api public
+ */
+
+Atrule.prototype.clone = function(parent){
+  var clone = new Atrule(this.type);
+  if (this.block) clone.block = this.block.clone(parent, clone);
+  clone.segments = this.segments.map(function(node){ return node.clone(parent, clone); });
+  clone.lineno = this.lineno;
+  clone.column = this.column;
+  clone.filename = this.filename;
+  return clone;
+};
+
+/**
+ * Return a JSON representation of this node.
+ *
+ * @return {Object}
+ * @api public
+ */
+
+Atrule.prototype.toJSON = function(){
+  var json = {
+    __type: 'Atrule',
+    type: this.type,
+    segments: this.segments,
+    lineno: this.lineno,
+    column: this.column,
+    filename: this.filename
+  };
+  if (this.block) json.block = this.block;
+  return json;
+};
+
+/**
+ * Return @<type>.
+ *
+ * @return {String}
+ * @api public
+ */
+
+Atrule.prototype.toString = function(){
+  return '@' + this.type;
+};
+
+/**
+ * Check if the at-rule's block has output nodes.
+ *
+ * @return {Boolean}
+ * @api public
+ */
+
+Atrule.prototype.__defineGetter__('hasOutput', function(){
+  return !!this.block && hasOutput(this.block);
+});
+
+function hasOutput(block) {
+  var nodes = block.nodes;
+
+  // only placeholder selectors
+  if (nodes.every(function(node){
+    return 'group' == node.nodeName && node.hasOnlyPlaceholders;
+  })) return false;
+
+  // something visible
+  return nodes.some(function(node) {
+    switch (node.nodeName) {
+      case 'property':
+      case 'literal':
+      case 'import':
+        return true;
+      case 'block':
+        return hasOutput(node);
+      default:
+        if (node.block) return hasOutput(node.block);
+    }
+  });
+}