Avoid duplicate work when BlockCode changes

https://phabricator.endlessm.com/T35541

Author: dylanmccall

addons/block_code/block_code_plugin.gd

@@ -136,6 +136,9 @@ func _on_editor_inspector_edited_object_changed():
 
 
 func select_block_code_node(block_code: BlockCode):
+	if block_code == _selected_block_code:
+		return
+
 	if not is_block_code_editable(block_code):
 		block_code = null
 
@@ -153,9 +156,23 @@ func select_block_code_node(block_code: BlockCode):
 		_selected_block_code.property_list_changed.connect(_on_selected_block_code_changed)
 		editor_inspector.property_edited.connect(_on_editor_inspector_property_edited)
 
+	_refresh_block_code_node()
+
+
+func _refresh_block_code_node():
 	main_panel.switch_block_code_node(_selected_block_code)
 
 
+func _on_selected_block_code_changed():
+	if _selected_block_code:
+		_refresh_block_code_node()
+
+
+func _on_editor_inspector_property_edited(property: String):
+	if _selected_block_code:
+		_refresh_block_code_node()
+
+
 static func is_block_code_editable(block_code: BlockCode) -> bool:
 	if not block_code:
 		return false
@@ -183,16 +200,6 @@ static func list_block_code_nodes_for_node(node: Node, recursive: bool = false)
 	return result
 
 
-func _on_selected_block_code_changed():
-	if _selected_block_code:
-		_on_editor_inspector_edited_object_changed()
-
-
-func _on_editor_inspector_property_edited(property: String):
-	if _selected_block_code:
-		_on_editor_inspector_edited_object_changed()
-
-
 func _get_plugin_name():
 	return "Block Code"