implement split line command

lib/ace/commands/default_commands.js

@@ -257,6 +257,10 @@ canon.addCommand({
     }
 });
 canon.addCommand({
+canon.addCommand({
+    name: "splitline",
+    exec: function(env, args, request) { env.editor.splitLine(); }
+});
     name: "transposeletters",
     exec: function(env, args, request) { env.editor.transposeLetters(); }
 });

lib/ace/editor.js

@@ -565,6 +565,19 @@ var Editor =function(renderer, session) {
         this.clearSelection();
     };
 
+    this.splitLine = function() {
+        if (this.$readOnly)
+            return;
+        
+        if (!this.selection.isEmpty()) {
+            this.session.remove(this.getSelectionRange());
+            this.clearSelection();
+        }
+    
+        var cursor = this.getCursorPosition();
+        this.insert("\n");
+        this.moveCursorToPosition(cursor);
+    };
     
     this.transposeLetters = function() {
         if (this.$readOnly)