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/**
* Copyright (c) 2015 Daniel Molkentin <danimo@owncloud.com>. All rights reserved.
*
* 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.
*/
#include "stdafx.h"
#include "OCContextMenuRegHandler.h"
#include "RegDelnode.h"
#include <strsafe.h>
#include <objbase.h>
namespace {
HRESULT SetHKCRRegistryKeyAndValue(PCWSTR pszSubKey, PCWSTR pszValueName, PCWSTR pszData)
{
HRESULT hr;
HKEY hKey = NULL;
// Creates the specified registry key. If the key already exists, the
// function opens it.
hr = HRESULT_FROM_WIN32(RegCreateKeyEx(HKEY_CLASSES_ROOT, pszSubKey, 0,
NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey, NULL));
if (SUCCEEDED(hr))
{
if (pszData != NULL)
{
// Set the specified value of the key.
DWORD cbData = lstrlen(pszData) * sizeof(*pszData);
hr = HRESULT_FROM_WIN32(RegSetValueEx(hKey, pszValueName, 0,
REG_SZ, reinterpret_cast<const BYTE *>(pszData), cbData));
}
RegCloseKey(hKey);
}
return hr;
}
HRESULT GetHKCRRegistryKeyAndValue(PCWSTR pszSubKey, PCWSTR pszValueName, PWSTR pszData, DWORD cbData)
{
HRESULT hr;
HKEY hKey = NULL;
// Try to open the specified registry key.
hr = HRESULT_FROM_WIN32(RegOpenKeyEx(HKEY_CLASSES_ROOT, pszSubKey, 0,
KEY_READ, &hKey));
if (SUCCEEDED(hr))
{
// Get the data for the specified value name.
hr = HRESULT_FROM_WIN32(RegQueryValueEx(hKey, pszValueName, NULL,
NULL, reinterpret_cast<LPBYTE>(pszData), &cbData));
RegCloseKey(hKey);
}
return hr;
}
}
HRESULT OCContextMenuRegHandler::RegisterInprocServer(PCWSTR pszModule, const CLSID& clsid, PCWSTR pszFriendlyName, PCWSTR pszThreadModel)
{
if (pszModule == NULL || pszThreadModel == NULL)
{
return E_INVALIDARG;
}
HRESULT hr;
wchar_t szCLSID[MAX_PATH];
StringFromGUID2(clsid, szCLSID, ARRAYSIZE(szCLSID));
wchar_t szSubkey[MAX_PATH];
// Create the HKCR\CLSID\{<CLSID>} key.
hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey), L"CLSID\\%s", szCLSID);
if (SUCCEEDED(hr))
{
hr = SetHKCRRegistryKeyAndValue(szSubkey, NULL, pszFriendlyName);
// Create the HKCR\CLSID\{<CLSID>}\InprocServer32 key.
if (SUCCEEDED(hr))
{
hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey),
L"CLSID\\%s\\InprocServer32", szCLSID);
if (SUCCEEDED(hr))
{
// Set the default value of the InprocServer32 key to the
// path of the COM module.
hr = SetHKCRRegistryKeyAndValue(szSubkey, NULL, pszModule);
if (SUCCEEDED(hr))
{
// Set the threading model of the component.
hr = SetHKCRRegistryKeyAndValue(szSubkey,
L"ThreadingModel", pszThreadModel);
}
}
}
}
return hr;
}
HRESULT OCContextMenuRegHandler::UnregisterInprocServer(const CLSID& clsid)
{
HRESULT hr = S_OK;
wchar_t szCLSID[MAX_PATH];
StringFromGUID2(clsid, szCLSID, ARRAYSIZE(szCLSID));
wchar_t szSubkey[MAX_PATH];
// Delete the HKCR\CLSID\{<CLSID>} key.
hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey), L"CLSID\\%s", szCLSID);
if (SUCCEEDED(hr))
{
hr = HRESULT_FROM_WIN32(RegDelnode(HKEY_CLASSES_ROOT, szSubkey));
}
return hr;
}
HRESULT OCContextMenuRegHandler::RegisterShellExtContextMenuHandler(
PCWSTR pszFileType, const CLSID& clsid, PCWSTR pszFriendlyName)
{
if (pszFileType == NULL)
{
return E_INVALIDARG;
}
HRESULT hr;
wchar_t szCLSID[MAX_PATH];
StringFromGUID2(clsid, szCLSID, ARRAYSIZE(szCLSID));
wchar_t szSubkey[MAX_PATH];
// If pszFileType starts with '.', try to read the default value of the
// HKCR\<File Type> key which contains the ProgID to which the file type
// is linked.
if (*pszFileType == L'.')
{
wchar_t szDefaultVal[260];
hr = GetHKCRRegistryKeyAndValue(pszFileType, NULL, szDefaultVal,
sizeof(szDefaultVal));
// If the key exists and its default value is not empty, use the
// ProgID as the file type.
if (SUCCEEDED(hr) && szDefaultVal[0] != L'\0')
{
pszFileType = szDefaultVal;
}
}
// Create the key HKCR\<File Type>\shellex\ContextMenuHandlers\{friendlyName>}
hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey),
L"%s\\shellex\\ContextMenuHandlers\\%s", pszFileType, pszFriendlyName);
if (SUCCEEDED(hr))
{
// Set the default value of the key.
hr = SetHKCRRegistryKeyAndValue(szSubkey, NULL, szCLSID);
}
return hr;
}
HRESULT OCContextMenuRegHandler::UnregisterShellExtContextMenuHandler(
PCWSTR pszFileType, PCWSTR pszFriendlyName)
{
if (pszFileType == NULL)
{
return E_INVALIDARG;
}
HRESULT hr;
wchar_t szSubkey[MAX_PATH];
// If pszFileType starts with '.', try to read the default value of the
// HKCR\<File Type> key which contains the ProgID to which the file type
// is linked.
if (*pszFileType == L'.')
{
wchar_t szDefaultVal[260];
hr = GetHKCRRegistryKeyAndValue(pszFileType, NULL, szDefaultVal,
sizeof(szDefaultVal));
// If the key exists and its default value is not empty, use the
// ProgID as the file type.
if (SUCCEEDED(hr) && szDefaultVal[0] != L'\0')
{
pszFileType = szDefaultVal;
}
}
// Remove the HKCR\<File Type>\shellex\ContextMenuHandlers\{friendlyName} key.
hr = StringCchPrintf(szSubkey, ARRAYSIZE(szSubkey),
L"%s\\shellex\\ContextMenuHandlers\\%s", pszFileType, pszFriendlyName);
if (SUCCEEDED(hr))
{
hr = HRESULT_FROM_WIN32(RegDelnode(HKEY_CLASSES_ROOT, szSubkey));
}
return hr;
}
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