reactos/dll/win32/shell32/folders.cpp

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/*
* Copyright 1997 Marcus Meissner
* Copyright 1998 Juergen Schmied
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "precomp.h"
WCHAR swShell32Name[MAX_PATH];
DWORD NumIconOverlayHandlers = 0;
IShellIconOverlayIdentifier ** Handlers = NULL;
static void InitIconOverlays(void)
{
HKEY hKey;
DWORD dwIndex, dwResult, dwSize;
WCHAR szName[MAX_PATH];
WCHAR szValue[100];
CLSID clsid;
if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\ShellIconOverlayIdentifiers", 0, KEY_READ, &hKey) != ERROR_SUCCESS)
return;
if (RegQueryInfoKeyW(hKey, NULL, NULL, NULL, &dwResult, NULL, NULL, NULL, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
{
RegCloseKey(hKey);
return;
}
Handlers = (IShellIconOverlayIdentifier **)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, dwResult * sizeof(IShellIconOverlayIdentifier*));
if (!Handlers)
{
RegCloseKey(hKey);
return;
}
dwIndex = 0;
CoInitialize(0);
do
{
dwSize = sizeof(szName) / sizeof(WCHAR);
dwResult = RegEnumKeyExW(hKey, dwIndex, szName, &dwSize, NULL, NULL, NULL, NULL);
if (dwResult == ERROR_NO_MORE_ITEMS)
break;
if (dwResult == ERROR_SUCCESS)
{
dwSize = sizeof(szValue) / sizeof(WCHAR);
if (RegGetValueW(hKey, szName, NULL, RRF_RT_REG_SZ, NULL, szValue, &dwSize) == ERROR_SUCCESS)
{
CComPtr<IShellIconOverlayIdentifier> Overlay;
CLSIDFromString(szValue, &clsid);
dwResult = CoCreateInstance(clsid, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARG(IShellIconOverlayIdentifier, &Overlay));
if (dwResult == S_OK)
{
Handlers[NumIconOverlayHandlers] = Overlay.Detach();
NumIconOverlayHandlers++;
}
}
}
dwIndex++;
} while(1);
RegCloseKey(hKey);
}
BOOL
GetIconOverlay(LPCITEMIDLIST pidl, WCHAR * wTemp, int* pIndex)
{
DWORD Index;
HRESULT hResult;
int Priority;
int HighestPriority;
ULONG IconIndex;
ULONG Flags;
WCHAR szPath[MAX_PATH];
if(!SHGetPathFromIDListW(pidl, szPath))
return FALSE;
if (!Handlers)
InitIconOverlays();
HighestPriority = 101;
IconIndex = NumIconOverlayHandlers;
for(Index = 0; Index < NumIconOverlayHandlers; Index++)
{
hResult = Handlers[Index]->IsMemberOf(szPath, SFGAO_FILESYSTEM);
if (hResult == S_OK)
{
hResult = Handlers[Index]->GetPriority(&Priority);
if (hResult == S_OK)
{
if (Priority < HighestPriority)
{
HighestPriority = Priority;
IconIndex = Index;
}
}
}
}
if (IconIndex == NumIconOverlayHandlers)
return FALSE;
hResult = Handlers[IconIndex]->GetOverlayInfo(wTemp, MAX_PATH, pIndex, &Flags);
if (hResult == S_OK)
return TRUE;
else
return FALSE;
}