[tfaber] 71081: [SHELL32] - Correctly handle desktop pidls in CDesktopFolder::CompareIDs. Based on a patch by Sylvain Deverre. CORE-10747 CORE-10801 #resolve

Author: tfaber
Date: Wed Mar 30 11:35:22 2016
New Revision: 71081

URL: http://svn.reactos.org/svn/reactos?rev=71081&view=rev
Log:
[SHELL32]
- Correctly handle desktop pidls in CDesktopFolder::CompareIDs. Based on a patch by Sylvain Deverre.
CORE-10747 CORE-10801 #resolve

Modified:
    trunk/reactos/dll/win32/shell32/folders/CDesktopFolder.cpp

Modified: trunk/reactos/dll/win32/shell32/folders/CDesktopFolder.cpp
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/shell32/folders/C...
==============================================================================
--- trunk/reactos/dll/win32/shell32/folders/CDesktopFolder.cpp	[iso-8859-1] (original)
+++ trunk/reactos/dll/win32/shell32/folders/CDesktopFolder.cpp	[iso-8859-1] Wed Mar 30 11:35:22 2016
@@ -463,11 +463,18 @@
  */
 HRESULT WINAPI CDesktopFolder::CompareIDs(LPARAM lParam, PCUIDLIST_RELATIVE pidl1, PCUIDLIST_RELATIVE pidl2)
 {
+    bool bIsDesktopFolder1, bIsDesktopFolder2;
+
     if (!pidl1 || !pidl2)
     {
         ERR("Got null pidl pointer (%Ix %p %p)!\n", lParam, pidl1, pidl2);
         return E_INVALIDARG;
     }
+
+    bIsDesktopFolder1 = _ILIsDesktop(pidl1);
+    bIsDesktopFolder2 = _ILIsDesktop(pidl2);
+    if (bIsDesktopFolder1 || bIsDesktopFolder2)
+        return MAKE_COMPARE_HRESULT(bIsDesktopFolder1 - bIsDesktopFolder2);

if (_ILIsSpecialFolder(pidl1) || _ILIsSpecialFolder(pidl2))
         return SHELL32_CompareGuidItems(this, lParam, pidl1, pidl2);