add separate compilers

Author: tj

component.json

@@ -4,5 +4,9 @@
   "version": "1.2.0",
   "description": "CSS compiler",
   "keywords": ["css", "stringify", "stylesheet"],
-  "scripts": ["index.js"]
+  "scripts": [
+    "index.js",
+    "lib/compress.js",
+    "lib/identity.js"
+  ]
 }

index.js

@@ -1,4 +1,11 @@
 
+/**
+ * Module dependencies.
+ */
+
+var Compressed = require('./lib/compress');
+var Identity = require('./lib/identity');
+
 /**
  * Stringfy the given AST `node`.
  *
@@ -9,238 +16,10 @@
  */
 
 module.exports = function(node, options){
-  return new Compiler(options).compile(node);
-};
-
-/**
- * Initialize a new `Compiler`.
- */
-
-function Compiler(options) {
-  options = options || {};
-  this.compress = options.compress;
-  this.indentation = options.indent;
-}
-
-/**
- * Compile `node`.
- */
-
-Compiler.prototype.compile = function(node){
-  return node.stylesheet
-    .rules.map(this.visit, this)
-    .join(this.compress ? '' : '\n\n');
-};
-
-/**
- * Visit `node`.
- */
-
-Compiler.prototype.visit = function(node){
-  return this[node.type](node);
-};
-
-/**
- * Visit comment node.
- */
-
-Compiler.prototype.comment = function(node){
-  if (this.compress) return '';
-  return this.indent() + '/*' + node.comment + '*/';
-};
-
-/**
- * Visit import node.
- */
-
-Compiler.prototype.import = function(node){
-  return '@import ' + node.import + ';';
-};
-
-/**
- * Visit media node.
- */
-
-Compiler.prototype.media = function(node){
-  if (this.compress) {
-    return '@media '
-      + node.media
-      + '{'
-      + node.rules.map(this.visit, this).join('')
-      + '}';
-  }
-
-  return '@media '
-    + node.media
-    + ' {\n'
-    + this.indent(1)
-    + node.rules.map(this.visit, this).join('\n\n')
-    + this.indent(-1)
-    + '\n}';
-};
-
-/**
- * Visit document node.
- */
-
-Compiler.prototype.document = function(node){
-  var doc = '@' + (node.vendor || '') + 'document ' + node.document;
-
-  if (this.compress) {
-    return doc
-      + '{'
-      + node.rules.map(this.visit, this).join('')
-      + '}';
-  }
-
-  return doc + ' '
-    + ' {\n'
-    + this.indent(1)
-    + node.rules.map(this.visit, this).join('\n\n')
-    + this.indent(-1)
-    + '\n}';
-};
-
-/**
- * Visit charset node.
- */
-
-Compiler.prototype.charset = function(node){
-  if (this.compress) {
-    return '@charset ' + node.charset + ';';
+  if (options.compress) {
+    return new Compressed(options).compile(node);
   }
 
-  return '@charset ' + node.charset + ';\n';
+  return new Identity(options).compile(node);
 };
 
-/**
- * Visit supports node.
- */
-
-Compiler.prototype.supports = function(node){
-  return '@supports '
-    + node.supports
-    + ' {\n'
-    + this.indent(1)
-    + node.rules.map(this.visit, this).join('\n\n')
-    + this.indent(-1)
-    + '\n}';
-};
-
-/**
- * Visit keyframes node.
- */
-
-Compiler.prototype.keyframes = function(node){
-  if (this.compress) {
-    return '@'
-      + (node.vendor || '')
-      + 'keyframes '
-      + node.name
-      + '{'
-      + node.keyframes.map(this.visit, this).join('')
-      + '}';
-  }
-
-  return '@'
-    + (node.vendor || '')
-    + 'keyframes '
-    + node.name
-    + ' {\n'
-    + this.indent(1)
-    + node.keyframes.map(this.visit, this).join('\n')
-    + this.indent(-1)
-    + '}';
-};
-
-/**
- * Visit keyframe node.
- */
-
-Compiler.prototype.keyframe = function(node){
-  var decls = node.declarations;
-
-  if (this.compress) {
-    return node.values.join(',')
-      + '{'
-      + decls.map(this.visit, this).join('')
-      + '}';
-  }
-
-  return this.indent()
-    + node.values.join(', ')
-    + ' {\n'
-    + this.indent(1)
-    + decls.map(this.visit, this).join('\n')
-    + this.indent(-1)
-    + '\n' + this.indent() + '}\n';
-};
-
-/**
- * Visit page node.
- */
-
-Compiler.prototype.page = function(node){
-  var sel = node.selectors.length
-    ? node.selectors.join(', ') + ' '
-    : '';
-
-  return '@page ' + sel
-    + '{\n'
-    + this.indent(1)
-    + node.declarations.map(this.visit, this).join('\n')
-    + this.indent(-1)
-    + '\n}';
-};
-
-/**
- * Visit rule node.
- */
-
-Compiler.prototype.rule = function(node){
-  var indent = this.indent();
-  var decls = node.declarations;
-
-  if (this.compress) {
-    if (!decls.length) return '';
-
-    return node.selectors.join(',')
-      + '{'
-      + decls.map(this.visit, this).join('')
-      + '}';
-  }
-
-  return node.selectors.map(function(s){ return indent + s }).join(',\n')
-    + ' {\n'
-    + this.indent(1)
-    + decls.map(this.visit, this).join('\n')
-    + this.indent(-1)
-    + '\n' + this.indent() + '}';
-};
-
-/**
- * Visit declaration node.
- */
-
-Compiler.prototype.declaration = function(node){
-  if (this.compress) {
-    return node.property + ':' + node.value + ';';
-  }
-
-  return this.indent() + node.property + ': ' + node.value + ';';
-};
-
-/**
- * Increase, decrease or return current indentation.
- */
-
-Compiler.prototype.indent = function(level) {
-  this.level = this.level || 1;
-
-  if (null != level) {
-    this.level += level;
-    return '';
-  }
-
-  return Array(this.level).join(this.indentation || '  ');
-};