fix: dragging multiple blocks (#170)

* fix: dragging blocks with the same type and content

* fix: dragging blocks after dropped outside the editor

* Code style fix

---------

Co-authored-by: Matthew Lipski <[email protected]>

Author: PhilipWillms

packages/core/src/extensions/DraggableBlocks/DraggableBlocksPlugin.ts

@@ -208,9 +208,9 @@ function dragStart(e: DragEvent, view: EditorView) {
     const { from, to } = blockPositionsFromSelection(selection, doc);
 
     const draggedBlockInSelection = from <= pos && pos < to;
-    const multipleBlocksSelected = !selection.$anchor
-      .node()
-      .eq(selection.$head.node());
+    const multipleBlocksSelected =
+      selection.$anchor.node() !== selection.$head.node() ||
+      selection instanceof MultipleNodeSelection;
 
     if (draggedBlockInSelection && multipleBlocksSelected) {
       view.dispatch(