add @page compilation support

Author: tj

examples/page.css

@@ -0,0 +1,8 @@
+@page {
+  size: auto;
+  margin: 10%
+}
+
+@page foo, bar {
+  bar: baz
+}

examples/page.js

@@ -0,0 +1,12 @@
+
+/**
+ * Module dependencies.
+ */
+
+var parse = require('css-parse')
+  , stringify = require('..')
+  , fs = require('fs')
+  , read = fs.readFileSync
+  , css = read('examples/page.css', 'utf8');
+
+console.log(stringify(parse(css), { compress: false }));

index.js

@@ -36,6 +36,7 @@ Compiler.prototype.compile = function(node){
  */
 
 Compiler.prototype.visit = function(node){
+  if ('page' == node.type) return this.page(node);
   if (node.document) return this.document(node);
   if (node.comment) return this.comment(node);
   if (node.charset) return this.charset(node);
@@ -165,6 +166,19 @@ Compiler.prototype.keyframe = function(node){
     + '\n' + this.indent() + '}\n';
 };
 
+/**
+ * Visit page node.
+ */
+
+Compiler.prototype.page = function(node){
+  return '@page ' + node.selectors.join(', ')
+    + ' {\n'
+    + this.indent(1)
+    + node.declarations.map(this.declaration, this).join(';\n')
+    + this.indent(-1)
+    + '\n}';
+};
+
 /**
  * Visit rule node.
  */