Add getActiveNoteBlock function

heynote-codemirror/src/block/note-block.js

@@ -54,6 +54,12 @@ export const blockState = StateField.define({
     },
 })
 
+export function getActiveNoteBlock(state) {
+    // find which block the cursor is in
+    const range = state.selection.asSingle().ranges[0]
+    return state.facet(blockState).find(block => block.content.from <= range.from && block.content.to >= range.from)
+}
+
 
 class NoteBlockStart extends WidgetType {
     constructor() {