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server/libs/css/stringify/compress.js

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+
+/**
+ * Module dependencies.
+ */
+
+var Base = require('./compiler');
+var inherits = require('inherits');
+
+/**
+ * Expose compiler.
+ */
+
+module.exports = Compiler;
+
+/**
+ * Initialize a new `Compiler`.
+ */
+
+function Compiler(options) {
+  Base.call(this, options);
+}
+
+/**
+ * Inherit from `Base.prototype`.
+ */
+
+inherits(Compiler, Base);
+
+/**
+ * Compile `node`.
+ */
+
+Compiler.prototype.compile = function(node){
+  return node.stylesheet
+    .rules.map(this.visit, this)
+    .join('');
+};
+
+/**
+ * Visit comment node.
+ */
+
+Compiler.prototype.comment = function(node){
+  return this.emit('', node.position);
+};
+
+/**
+ * Visit import node.
+ */
+
+Compiler.prototype.import = function(node){
+  return this.emit('@import ' + node.import + ';', node.position);
+};
+
+/**
+ * Visit media node.
+ */
+
+Compiler.prototype.media = function(node){
+  return this.emit('@media ' + node.media, node.position)
+    + this.emit('{')
+    + this.mapVisit(node.rules)
+    + this.emit('}');
+};
+
+/**
+ * Visit document node.
+ */
+
+Compiler.prototype.document = function(node){
+  var doc = '@' + (node.vendor || '') + 'document ' + node.document;
+
+  return this.emit(doc, node.position)
+    + this.emit('{')
+    + this.mapVisit(node.rules)
+    + this.emit('}');
+};
+
+/**
+ * Visit charset node.
+ */
+
+Compiler.prototype.charset = function(node){
+  return this.emit('@charset ' + node.charset + ';', node.position);
+};
+
+/**
+ * Visit namespace node.
+ */
+
+Compiler.prototype.namespace = function(node){
+  return this.emit('@namespace ' + node.namespace + ';', node.position);
+};
+
+/**
+ * Visit supports node.
+ */
+
+Compiler.prototype.supports = function(node){
+  return this.emit('@supports ' + node.supports, node.position)
+    + this.emit('{')
+    + this.mapVisit(node.rules)
+    + this.emit('}');
+};
+
+/**
+ * Visit keyframes node.
+ */
+
+Compiler.prototype.keyframes = function(node){
+  return this.emit('@'
+    + (node.vendor || '')
+    + 'keyframes '
+    + node.name, node.position)
+    + this.emit('{')
+    + this.mapVisit(node.keyframes)
+    + this.emit('}');
+};
+
+/**
+ * Visit keyframe node.
+ */
+
+Compiler.prototype.keyframe = function(node){
+  var decls = node.declarations;
+
+  return this.emit(node.values.join(','), node.position)
+    + this.emit('{')
+    + this.mapVisit(decls)
+    + this.emit('}');
+};
+
+/**
+ * Visit page node.
+ */
+
+Compiler.prototype.page = function(node){
+  var sel = node.selectors.length
+    ? node.selectors.join(', ')
+    : '';
+
+  return this.emit('@page ' + sel, node.position)
+    + this.emit('{')
+    + this.mapVisit(node.declarations)
+    + this.emit('}');
+};
+
+/**
+ * Visit font-face node.
+ */
+
+Compiler.prototype['font-face'] = function(node){
+  return this.emit('@font-face', node.position)
+    + this.emit('{')
+    + this.mapVisit(node.declarations)
+    + this.emit('}');
+};
+
+/**
+ * Visit host node.
+ */
+
+Compiler.prototype.host = function(node){
+  return this.emit('@host', node.position)
+    + this.emit('{')
+    + this.mapVisit(node.rules)
+    + this.emit('}');
+};
+
+/**
+ * Visit custom-media node.
+ */
+
+Compiler.prototype['custom-media'] = function(node){
+  return this.emit('@custom-media ' + node.name + ' ' + node.media + ';', node.position);
+};
+
+/**
+ * Visit rule node.
+ */
+
+Compiler.prototype.rule = function(node){
+  var decls = node.declarations;
+  if (!decls.length) return '';
+
+  return this.emit(node.selectors.join(','), node.position)
+    + this.emit('{')
+    + this.mapVisit(decls)
+    + this.emit('}');
+};
+
+/**
+ * Visit declaration node.
+ */
+
+Compiler.prototype.declaration = function(node){
+  return this.emit(node.property + ':' + node.value, node.position) + this.emit(';');
+};
+