add csslint checking

lib/ace/mode/css.js

@@ -42,6 +42,7 @@ var TextMode = require("ace/mode/text").Mode;
 var Tokenizer = require("ace/tokenizer").Tokenizer;
 var CssHighlightRules = require("ace/mode/css_highlight_rules").CssHighlightRules;
 var MatchingBraceOutdent = require("ace/mode/matching_brace_outdent").MatchingBraceOutdent;
+var WorkerClient = require("ace/worker/worker_client").WorkerClient;
 
 var Mode = function() {
     this.$tokenizer = new Tokenizer(new CssHighlightRules().getRules());
@@ -75,6 +76,35 @@ oop.inherits(Mode, TextMode);
     this.autoOutdent = function(state, doc, row) {
         this.$outdent.autoOutdent(doc, row);
     };
+    
+    this.createWorker = function(session) {
+        var doc = session.getDocument();
+        var worker = new WorkerClient(["ace", "pilot"], "worker-css.js", "ace/mode/css_worker", "Worker");
+        worker.call("setValue", [doc.getValue()]);
+        
+        doc.on("change", function(e) {
+            e.range = {
+                start: e.data.range.start,
+                end: e.data.range.end
+            };
+            worker.emit("change", e);
+        });
+        
+        worker.on("csslint", function(e) {
+            var errors = [];
+            e.data.forEach(function(message) {
+                errors.push({
+                    row: message.line - 1,
+                    column: message.col - 1,
+                    text: message.message,
+                    type: message.type,
+                    lint: message
+                });
+            });
+            
+            session.setAnnotations(errors);
+        });
+    };
 
 }).call(Mode.prototype);