fdo#46355 sort SelectionTree control of Custom Setup with a custom action

Although Microsoft says that SelectionTree control can publish a control
event only on Windows Server 2003 and above, the  custom action seems to
be working under a fully patched Windows XP SP3. Maybe it fails silently
on older Windows XPs, not to mention Windows 2000. I did not test those.

scp2/source/ooo/windowscustomaction_ooo.scp

@@ -474,6 +474,15 @@ WindowsCustomAction gid_Customaction_SelectLanguage
     Assignment1 = ("ControlEvent", "SetupType", "Next", "DoAction", "SelectLanguage", "1", "1");
 End
 
+WindowsCustomAction gid_Customaction_SortTree
+    Name = "SortTree";
+    Typ = "321";
+    Source = "sellangmsi.dll";
+    Target = "SortTree";
+    Inbinarytable = 1;
+    Assignment1 = ("ControlEvent", "CustomSetup", "Tree", "DoAction", "SortTree", "1", "1");
+End
+
 WindowsCustomAction gid_Customaction_RebaseLibrariesonproperties
 	Name = "RebaseLibrariesOnProperties";
 	Typ = "65";

setup_native/source/win32/customactions/sellang/exports.dxp

 SelectLanguage
+SortTree

setup_native/source/win32/customactions/sellang/makefile.mk

@@ -49,7 +49,8 @@ CFLAGS+=-D_STLP_USE_STATIC_LIB
 UWINAPILIB=
 
 SLOFILES = \
-    $(SLO)$/sellang.obj
+    $(SLO)/sellang.obj \
+    $(SLO)/sorttree.obj
 
 SHL1STDLIBS= \
     $(KERNEL32LIB)\

setup_native/source/win32/customactions/sellang/sorttree.cxx

+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * Copyright 2012 LibreOffice contributors.
+ *
+ * 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/.
+ */
+
+#ifdef _MSC_VER
+#pragma warning(push, 1) /* disable warnings within system headers */
+#endif
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <msiquery.h>
+#include <commctrl.h>
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+extern "C" UINT __stdcall SortTree(MSIHANDLE)
+{
+    // Sort items (languages) in SelectionTree control, fdo#46355
+
+    HWND hwndMSI = FindWindow(TEXT("MsiDialogCloseClass"), NULL);
+    HWND hwndTV = FindWindowEx(hwndMSI, NULL, TEXT("SysTreeView32"), NULL);
+    HTREEITEM treeRoot = TreeView_GetRoot(hwndTV);
+    HTREEITEM optional = TreeView_GetNextSibling(hwndTV, treeRoot);
+    HTREEITEM dicts = TreeView_GetChild(hwndTV, optional);
+    TreeView_SortChildren(hwndTV, dicts, TRUE);
+    HTREEITEM langs = TreeView_GetNextSibling(hwndTV, optional);
+    TreeView_SortChildren(hwndTV, langs, TRUE);
+
+	return ERROR_SUCCESS;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */