contextmenu.blockcollapseoption

core/contextmenu.js

@@ -286,6 +286,31 @@ Blockly.ContextMenu.blockDuplicateOption = function(block, event) {
   return duplicateOption;
 };
 
+/**
+ * Make a context menu option for adding or removing comments on the current
+ * block.
+ * @param {!Blockly.BlockSvg} block The block where the right-click originated.
+ * @return {!Object} A menu option, containing text, enabled, and a callback.
+ * @package
+ */
+Blockly.ContextMenu.blockCollapseOption = function(block) {
+  var commentOption = {
+    enabled: true
+  };
+  if (block.isCollapsed()) {
+    commentOption.text = "Expand block";
+    commentOption.callback = function() {
+      block.setCollapsed(false)
+    };
+  } else {
+    commentOption.text = "Collapse block";
+    commentOption.callback = function() {
+      block.setCollapsed(true)
+    };
+  }
+  return commentOption;
+};
+
 /**
  * Make a context menu option for adding or removing comments on the current
  * block.