conversion from php to nodejs started

nodejs/node_modules/stylus/lib/convert/css.js

@@ -0,0 +1,307 @@
+/*!
+ * Stylus - CSS to Stylus conversion
+ * Copyright (c) Automattic <developer.wordpress.com>
+ * MIT Licensed
+ */
+
+/**
+ * Convert the given `css` to Stylus source.
+ *
+ * @param {String} css
+ * @return {String}
+ * @api public
+ */
+
+module.exports = function(css){
+  return new Converter(css).stylus();
+};
+
+/**
+ * Initialize a new `Converter` with the given `css`.
+ *
+ * @param {String} css
+ * @api private
+ */
+
+function Converter(css) {
+  var parse = require('css-parse');
+  this.css = css;
+  this.root = parse(css, { position: false });
+  this.indents = 0;
+}
+
+/**
+ * Convert to Stylus.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.stylus = function(){
+  return this.visitRules(this.root.stylesheet.rules);
+};
+
+/**
+ * Return indent string.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.__defineGetter__('indent', function(){
+  return Array(this.indents + 1).join('  ');
+});
+
+/**
+ * Visit `node`.
+ *
+ * @param {*} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visit = function(node){
+  switch (node.type) {
+    case 'rule':
+    case 'comment':
+    case 'charset':
+    case 'namespace':
+    case 'media':
+    case 'import':
+    case 'document':
+    case 'keyframes':
+    case 'page':
+    case 'host':
+    case 'supports':
+      var name = node.type[0].toUpperCase() + node.type.slice(1);
+      return this['visit' + name](node);
+  }
+};
+
+/**
+ * Visit the rules on `node`.
+ *
+ * @param {Array} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitRules = function(node){
+  var buf = '';
+  for (var i = 0, len = node.length; i < len; ++i) {
+    buf += this.visit(node[i]);
+  }
+  return buf;
+};
+
+/**
+ * Visit Media `node`.
+ *
+ * @param {Media} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitMedia = function(node){
+  var buf = this.indent + '@media ' + node.media;
+  buf += '\n';
+  ++this.indents;
+  buf += this.visitRules(node.rules);
+  --this.indents;
+  return buf;
+};
+
+/**
+ * Visit Declaration `node`.
+ *
+ * @param {Declaration} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitDeclaration = function(node){
+  if ('comment' == node.type) {
+    return this.visitComment(node);
+  } else {
+    var buf = this.indent + node.property + ': ' + node.value + '\n';
+    return buf;
+  }
+};
+
+/**
+ * Visit Rule `node`.`
+ *
+ * @param {Rule} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitRule = function(node){
+  var buf = this.indent + node.selectors.join(',\n' + this.indent) + '\n';
+  ++this.indents;
+  for (var i = 0, len = node.declarations.length; i < len; ++i) {
+    buf += this.visitDeclaration(node.declarations[i]);
+  }
+  --this.indents;
+  return buf + '\n';
+};
+
+/**
+ * Visit Comment `node`.`
+ *
+ * @param {Comment} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitComment = function(node){
+  var buf = this.indent + '/*' + node.comment + '*/';
+  return buf + '\n';
+};
+
+/**
+ * Visit Charset `node`.`
+ *
+ * @param {Charset} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitCharset = function(node){
+  var buf = this.indent + '@charset ' + node.charset;
+  return buf + '\n';
+};
+
+/**
+ * Visit Namespace `node`.`
+ *
+ * @param {Namespace} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitNamespace = function(node){
+  var buf = this.indent + '@namespace ' + node.namespace;
+  return buf + '\n';
+};
+
+/**
+ * Visit Import `node`.`
+ *
+ * @param {Import} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitImport = function(node){
+  var buf = this.indent + '@import ' + node.import;
+  return buf + '\n';
+};
+
+/**
+ * Visit Document `node`.`
+ *
+ * @param {Document} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitDocument = function(node){
+  var buf = this.indent + '@' + node.vendor + 'document ' + node.document;
+  buf += '\n';
+  ++this.indents;
+  buf += this.visitRules(node.rules);
+  --this.indents;
+  return buf;
+};
+
+/**
+ * Visit Keyframes `node`.`
+ *
+ * @param {Keyframes} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitKeyframes = function(node){
+  var buf = this.indent + '@keyframes ' + node.name;
+  buf += '\n';
+  ++this.indents;
+  for (var i = 0, len = node.keyframes.length; i < len; ++i) {
+    buf += this.visitKeyframe(node.keyframes[i]);
+  }
+  --this.indents;
+  return buf;
+};
+
+/**
+ * Visit Keyframe `node`.`
+ *
+ * @param {Keyframe} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitKeyframe = function(node){
+  var buf = this.indent + node.values.join(', ');
+  buf += '\n';
+  ++this.indents;
+  for (var i = 0, len = node.declarations.length; i < len; ++i) {
+    buf += this.visitDeclaration(node.declarations[i]);
+  }
+  --this.indents;
+  return buf;
+};
+
+/**
+ * Visit Page `node`.`
+ *
+ * @param {Page} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitPage = function(node){
+  var buf = this.indent + '@page' + (node.selectors.length ? ' ' + node.selectors.join(', ') : '');
+  buf += '\n';
+  ++this.indents;
+  for (var i = 0, len = node.declarations.length; i < len; ++i) {
+    buf += this.visitDeclaration(node.declarations[i]);
+  }
+  --this.indents;
+  return buf;
+};
+
+/**
+ * Visit Supports `node`.`
+ *
+ * @param {Supports} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitSupports = function(node){
+  var buf = this.indent + '@supports ' + node.supports;
+  buf += '\n';
+  ++this.indents;
+  buf += this.visitRules(node.rules);
+  --this.indents;
+  return buf;
+};
+
+/**
+ * Visit Host `node`.`
+ *
+ * @param {Host} node
+ * @return {String}
+ * @api private
+ */
+
+Converter.prototype.visitHost = function(node){
+  var buf = this.indent + '@host';
+  buf += '\n';
+  ++this.indents;
+  buf += this.visitRules(node.rules);
+  --this.indents;
+  return buf;
+};