1 files changed, 55 insertions, 0 deletions
diff --git a/setup_native/source/win32/customactions/sellang/sorttree.cxx b/setup_native/source/win32/customactions/sellang/sorttree.cxx
new file mode 100644
index 000000000..cb44675b9
--- /dev/null
+++ b/setup_native/source/win32/customactions/sellang/sorttree.cxx
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <msi.h>
+#include <commctrl.h>
+
+extern "C" __declspec(dllexport) UINT __stdcall SortTree(MSIHANDLE)
+{
+    // Sort items (languages) in SelectionTree control, fdo#46355
+
+    HWND hwndMSI = FindWindowW(L"MsiDialogCloseClass", nullptr);
+    if (hwndMSI == nullptr)
+    {
+        OutputDebugStringW(L"SortTree: MsiDialogCloseClass not found\n");
+        return ERROR_SUCCESS;
+    }
+    HWND hwndTV = FindWindowExW(hwndMSI, nullptr, L"SysTreeView32", nullptr);
+    if (hwndTV == nullptr)
+    {
+        OutputDebugStringW(L"SortTree: SysTreeView32 not found\n");
+        return ERROR_SUCCESS;
+    }
+    HTREEITEM optional = TreeView_GetRoot(hwndTV);
+    if (optional == nullptr)
+    {
+        OutputDebugStringW(L"SortTree: Optional Components branch not found\n");
+        return ERROR_SUCCESS;
+    }
+    HTREEITEM dicts = TreeView_GetChild(hwndTV, optional);
+    if (dicts == nullptr)
+    {
+        OutputDebugStringW(L"SortTree: Dictionaries branch not found\n");
+        return ERROR_SUCCESS;
+    }
+    TreeView_SortChildren(hwndTV, dicts, TRUE);
+    HTREEITEM langs = TreeView_GetNextSibling(hwndTV, optional);
+    if (langs == nullptr)
+    {
+        OutputDebugStringW(L"SortTree: Additional UI Languages branch not found\n");
+        return ERROR_SUCCESS;
+    }
+    TreeView_SortChildren(hwndTV, langs, TRUE);
+
+    return ERROR_SUCCESS;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */