[reactos] 01/02: [SHELL32] CFSFolder: Add fallback for failing shell extension

[Mark Jansen]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=9276b3f1bf1e34606eaa9…

commit 9276b3f1bf1e34606eaa968efea705d6fc7fa452
Author:     Mark Jansen <mark.jansen(a)reactos.org>
AuthorDate: Sun Sep 5 21:07:30 2021 +0200
Commit:     Mark Jansen <mark.jansen(a)reactos.org>
CommitDate: Tue Sep 21 21:42:25 2021 +0200

    [SHELL32] CFSFolder: Add fallback for failing shell extension
    
    CORE-17673
---
 dll/win32/shell32/folders/CFSFolder.cpp | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/dll/win32/shell32/folders/CFSFolder.cpp
b/dll/win32/shell32/folders/CFSFolder.cpp
index efdd2386d4b..f44a71f6b33 100644
--- a/dll/win32/shell32/folders/CFSFolder.cpp
+++ b/dll/win32/shell32/folders/CFSFolder.cpp
@@ -883,10 +883,26 @@ HRESULT WINAPI CFSFolder::BindToObject(
     CLSID clsidFolder;
     if (_ILIsFolder(pidl))
     {
-        clsidFolder = CLSID_ShellFSFolder;
-
         if ((pData->uFileAttribs & (FILE_ATTRIBUTE_SYSTEM |
FILE_ATTRIBUTE_READONLY)) != 0)
-            SHELL32_GetCLSIDForDirectory(pfti.szTargetParsingName, L"CLSID",
&clsidFolder);
+        {
+            hr = SHELL32_GetCLSIDForDirectory(pfti.szTargetParsingName,
L"CLSID", &clsidFolder);
+
+            if (SUCCEEDED(hr))
+            {
+                /* We got a GUID from a desktop.ini, let's try it */
+                hr = SHELL32_BindToSF(m_pidlRoot, &pfti, pidl, &clsidFolder,
riid, ppvOut);
+                if (SUCCEEDED(hr))
+                {
+                    TRACE("-- returning (%p) %08x, (%s)\n", *ppvOut, hr,
wine_dbgstr_guid(&clsidFolder));
+                    return hr;
+                }
+
+                /* Something went wrong, re-try it with a normal ShellFSFolder */
+                ERR("CFSFolder::BindToObject: %s failed to bind, using fallback
(0x%08x)\n", wine_dbgstr_guid(&clsidFolder), hr);
+            }
+        }
+        /* No system folder or the custom class failed */
+        clsidFolder = CLSID_ShellFSFolder;
     }
     else
     {