From de31603028e6bf4e0840796d5d3162044c8d56b3 Mon Sep 17 00:00:00 2001
From: Itamar <itamar8910@gmail.com>
Date: Fri, 10 Sep 2021 13:13:51 +0300
Subject: [PATCH] LibGUI: Remove Indices with dangling FileSystemModel::Node on
 deletion

When a file deletion event happens, we now iterate over all views of the
FileSystemModel and remove any selection & cursor indices that hold
dangling references do the deleted filesystem node.

This fixes #9602.
---
 Userland/Libraries/LibGUI/FileSystemModel.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Userland/Libraries/LibGUI/FileSystemModel.cpp b/Userland/Libraries/LibGUI/FileSystemModel.cpp
index f7e79e72a2..eb03b50850 100644
--- a/Userland/Libraries/LibGUI/FileSystemModel.cpp
+++ b/Userland/Libraries/LibGUI/FileSystemModel.cpp
@@ -12,6 +12,7 @@
 #include <LibCore/DirIterator.h>
 #include <LibCore/File.h>
 #include <LibCore/StandardPaths.h>
+#include <LibGUI/AbstractView.h>
 #include <LibGUI/FileIconProvider.h>
 #include <LibGUI/FileSystemModel.h>
 #include <LibGUI/Painter.h>
@@ -420,6 +421,16 @@ void FileSystemModel::handle_file_event(Core::FileWatcherEvent const& event)
         parent->m_children.remove(index.row());
 
         end_delete_rows();
+
+        for_each_view([&](AbstractView& view) {
+            view.selection().remove_matching([&](auto& selection_index) {
+                return selection_index.internal_data() == index.internal_data();
+            });
+            if (view.cursor_index().internal_data() == index.internal_data()) {
+                view.set_cursor({}, GUI::AbstractView::SelectionUpdate::None);
+            }
+        });
+
         break;
     }
     case Core::FileWatcherEvent::Type::MetadataModified: {