More work on Split. Update the demo UI on changes

lib/ace/edit_session/fold_line.js

@@ -58,7 +58,7 @@ function FoldLine(foldData, folds) {
     this.end   = this.range.end;
 
     this.folds.forEach(function(fold) {
-        fold.foldLine = this;
+        fold.setFoldLine(this);
     }, this);
 }
 

lib/ace/edit_session/folding.js

@@ -59,6 +59,22 @@ Fold.prototype.toString = function() {
     return '"' + this.placeholder + '" ' + this.range.toString();
 }
 
+Fold.prototype.setFoldLine = function(foldLine) {
+    this.foldLine = foldLine;
+    this.subFolds.forEach(function(fold) {
+        fold.setFoldLine(foldLine);
+    });
+}
+
+Fold.prototype.clone = function() {
+    var range = this.range.clone();
+    var fold = new Fold(range, this.placeholder);
+    this.subFolds.forEach(function(subFold) {
+        fold.subFolds.push(subFold.clone());
+    });
+    return fold;
+}
+
 function Folding() {
     /**
      * Looks up a fold at a given row/column. Possible values for side:
@@ -526,6 +542,19 @@ function Folding() {
                 foldLine, row, endColumn, startRow, startColumn);
         }
     };
+
+    this.$cloneFoldData = function() {
+        var foldData = this.$foldData;
+        var fd = [];
+        fd = this.$foldData.map(function(foldLine) {
+            var folds = foldLine.folds.map(function(fold) {
+                return fold.clone();
+            });
+            return new FoldLine(fd, folds);
+        });
+
+        return fd;
+    };
 }
 
 exports.Folding = Folding;