533 lines
15 KiB
C++
533 lines
15 KiB
C++
#include "pch.h"
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#pragma hdrstop
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TCHAR const c_szClass[] = TEXT("Class");
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TCHAR const c_szClasses[] = TEXT("Classes");
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TCHAR const c_szAllContainers[] = TEXT("AllContainers");
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TCHAR const c_szAllObjects[] = TEXT("AllObjects");
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TCHAR const c_szDsPropertyUI[] = TEXT("PropertiesHandler");
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//
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// This function is supposed to ultimately shutdown COM
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// regardless of how many times CoInitialize(NULL) has
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// been called.
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//
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void ShutdownCOM()
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{
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for(;;)
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{
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//
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// Call CoUninitialze() twice
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//
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CoUninitialize();
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CoUninitialize();
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//
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// Call CoInitialize(NULL) to see whether this will be the first
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// COM initialization. S_OK means COM is initialized successfully,
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// S_FALSE means it has been initialized already.
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//
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HRESULT hr = CoInitialize(NULL);
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if (SUCCEEDED(hr))
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{
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// S_OK, S_FALSE case
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if (S_OK == hr)
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{
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CoUninitialize();
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break;
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}
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else
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{
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// The internal COM ref count
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// still hasn't reached zero
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continue;
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}
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}
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else
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{
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// RPC_E_CHANGED_MODE case
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if (RPC_E_CHANGED_MODE == hr)
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{
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continue;
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}
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else
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{
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// Some other failure
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// E_OUTOFMEMORY for example
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break;
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}
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}
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}
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}
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/*-----------------------------------------------------------------------------
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/ Globals etc used for icon extraction
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/----------------------------------------------------------------------------*/
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/*-----------------------------------------------------------------------------
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/ GetKeysForClass
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/ ---------------
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/ Given a class and the flags assocaited with that extract the keys that
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/ represent it.
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/
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/ In:
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/ pObjectClass = class name to fetch keys for
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/ fIsConatiner = object is a container
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/ cKeys = number of keys to fetch
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/ aKeys = array to be filled with keys
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/
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/ Out:
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/ HRESULT
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/----------------------------------------------------------------------------*/
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HRESULT GetKeysForClass(LPWSTR pObjectClass, BOOL fIsContainer, INT cKeys, HKEY* aKeys)
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{
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HRESULT hres;
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HKEY hkClasses = NULL;
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CLSID clsidBase;
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LPTSTR pMappedClass = NULL;
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USES_CONVERSION;
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TraceEnter(TRACE_UI, "GetKeysForClass");
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if (cKeys < UIKEY_MAX)
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ExitGracefully(hres, E_INVALIDARG, "cKeys < UIKEY_MAX");
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ZeroMemory(aKeys, SIZEOF(HKEY)*cKeys);
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hres = GetKeyForCLSID(CLSID_MicrosoftDS, c_szClasses, &hkClasses);
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FailGracefully(hres, "Failed to get Classes key from registry");
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//
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// Attempt to look up the class name in the registery under the namespaces "classes"
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// sub key. A class can also be mapped onto another one, if this happens then we have
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// a base CLASS key which we indirect via
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//
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if (pObjectClass)
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{
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if (ERROR_SUCCESS == RegOpenKeyEx(hkClasses, W2T(pObjectClass), NULL, KEY_READ, &aKeys[UIKEY_CLASS]))
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{
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if (SUCCEEDED(LocalQueryString(&pMappedClass, aKeys[UIKEY_CLASS], c_szClass)))
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{
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if (ERROR_SUCCESS != RegOpenKeyEx(hkClasses, pMappedClass, NULL, KEY_READ, &aKeys[UIKEY_BASECLASS]))
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{
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aKeys[UIKEY_BASECLASS] = NULL;
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}
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}
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}
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}
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//
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// Finally we need the root class (container or object)
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//
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hres = GetKeyForCLSID(CLSID_MicrosoftDS, (fIsContainer) ? c_szAllContainers:c_szAllObjects, &aKeys[UIKEY_ROOT]);
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FailGracefully(hres, "Failed to get root key");
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// hres = S_OK; // success
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exit_gracefully:
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LocalFreeString(&pMappedClass);
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if (hkClasses)
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RegCloseKey(hkClasses);
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TraceLeaveResult(hres);
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}
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/*-----------------------------------------------------------------------------
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/ TidyKeys
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/ --------
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/ Given an array of keys release them and set them back to zero.
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/
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/ In:
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/ cKeys = number of keys in array
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/ aKeys = keys to be released
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/
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/ Out:
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/ void
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/----------------------------------------------------------------------------*/
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void TidyKeys(INT cKeys, HKEY* aKeys)
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{
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TraceEnter(TRACE_UI, "TidyKeys");
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while (--cKeys >= 0)
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{
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if (aKeys[cKeys])
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{
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RegCloseKey(aKeys[cKeys]);
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aKeys[cKeys] = NULL; // key now closed
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}
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}
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TraceLeaveVoid();
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}
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/*-----------------------------------------------------------------------------
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/ ShowObjectProperties
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/ --------------------
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/ Display properties for the given objects. This we do by invoking
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/ the tab collector for the given IDataObject. First however we
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/ look inside the object and see if we can find out what objects
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/ were selected, having done that we can then find the HKEYs
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/
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/ In:
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/ hwndParent = parent dialog
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/ pDataObject = data object that we must use
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/
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/ Out:
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/ HRESULT
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/----------------------------------------------------------------------------*/
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HRESULT _OverrideProperties(HWND hwndParent, LPDATAOBJECT pDataObject, HKEY* aKeys, INT cKeys, LPCWSTR pPrefix)
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{
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HRESULT hres;
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LPTSTR pPropertiesGUID = NULL;
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GUID guidProperties;
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IDsFolderProperties* pDsFolderProperties = NULL;
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TCHAR szBuffer[MAX_PATH];
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INT i;
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USES_CONVERSION;
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TraceEnter(TRACE_UI, "_OverrideProperties");
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// walk all the keys we were given, some will be NULL so ignore those
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StrCpy(szBuffer, W2CT(pPrefix));
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StrCat(szBuffer, c_szDsPropertyUI);
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Trace(TEXT("Prefixed property handler value: %s"), szBuffer);
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for (i = 0 ; i < cKeys ; i++)
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{
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LocalFreeString(&pPropertiesGUID);
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if (aKeys[i])
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{
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// if we have a handle attempt to get the GUID string from the registry
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// and convert it to a GUID so that we can call CoCreateInstance for the
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// IDsFolderProperites interface.
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if (FAILED(LocalQueryString(&pPropertiesGUID, aKeys[i], szBuffer)))
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{
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TraceMsg("Trying non-prefixed property handler");
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if (FAILED(LocalQueryString(&pPropertiesGUID, aKeys[i], c_szDsPropertyUI)))
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continue;
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}
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Trace(TEXT("GUID is: %s"), pPropertiesGUID);
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if (!GetGUIDFromString(pPropertiesGUID, &guidProperties))
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{
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TraceMsg("Failed to parse GUID");
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continue;
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}
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if (SUCCEEDED(CoCreateInstance(guidProperties, NULL, CLSCTX_INPROC_SERVER,
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IID_IDsFolderProperties, (LPVOID*)&pDsFolderProperties)))
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{
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TraceMsg("Calling IDsFolderProperties::ShowProperties");
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hres = pDsFolderProperties->ShowProperties(hwndParent, pDataObject);
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FailGracefully(hres, "Failed when calling ShowProperties");
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goto exit_gracefully;
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}
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}
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}
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hres = S_FALSE; // S_FALSE indicates that the caller should display properties
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exit_gracefully:
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LocalFreeString(&pPropertiesGUID);
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DoRelease(pDsFolderProperties);
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TraceLeaveResult(hres);
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}
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typedef struct
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{
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HWND hwndParent;
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IStream* pStream;
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} PROPERTIESTHREADDATA;
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DWORD WINAPI _ShowObjectPropertiesThread(LPVOID lpParam)
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{
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HRESULT hres;
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PROPERTIESTHREADDATA* pThreadData = (PROPERTIESTHREADDATA*)lpParam;
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IADsPathname* pPathname = NULL;
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IDataObject* pDataObject = NULL;
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FORMATETC fmte = {CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
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STGMEDIUM mediumNames = { TYMED_NULL, NULL, NULL };
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STGMEDIUM mediumOptions = { TYMED_NULL, NULL, NULL };
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LPDSOBJECTNAMES pDsObjects;
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LPDSDISPLAYSPECOPTIONS pDispSpecOptions;
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HKEY hKeys[3] = { NULL, NULL, NULL };
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LPTSTR pTitle = NULL;
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LPCWSTR pPrefix = DS_PROP_SHELL_PREFIX;
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BSTR bstrName = NULL;
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INT i;
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USES_CONVERSION;
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TraceEnter(TRACE_UI, "ShowObjectPropertiesThread");
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CoInitialize(NULL);
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hres = CoGetInterfaceAndReleaseStream(pThreadData->pStream, IID_IDataObject, (void**)&pDataObject);
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FailGracefully(hres, "Failed to get data object from stream");
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// get the object names that we are showing properites on
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fmte.cfFormat = (CLIPFORMAT)RegisterClipboardFormat(CFSTR_DSOBJECTNAMES);
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hres = pDataObject->GetData(&fmte, &mediumNames);
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FailGracefully(hres, "Failed to get selected objects");
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pDsObjects = (LPDSOBJECTNAMES)mediumNames.hGlobal;
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// get the attribute prefix, use this to key information from the registry
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fmte.cfFormat = (CLIPFORMAT)RegisterClipboardFormat(CFSTR_DSDISPLAYSPECOPTIONS);
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if (SUCCEEDED(pDataObject->GetData(&fmte, &mediumOptions)))
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{
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pDispSpecOptions = (LPDSDISPLAYSPECOPTIONS)mediumOptions.hGlobal;
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pPrefix = (LPCWSTR)ByteOffset(pDispSpecOptions, pDispSpecOptions->offsetAttribPrefix);
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}
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Trace(TEXT("Attribute prefix is: %s"), W2CT(pPrefix));
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if (pDsObjects && (pDsObjects->cItems >= 1))
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{
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LPWSTR pPath = (LPWSTR)ByteOffset(pDsObjects, pDsObjects->aObjects[0].offsetName);
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LPWSTR pObjectClass = (LPWSTR)ByteOffset(pDsObjects, pDsObjects->aObjects[0].offsetClass);
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BOOL fSelection = (pDsObjects->cItems > 1);
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Trace(TEXT("Items %d, 1st object: %s, 1st Class: %s"), pDsObjects->cItems, W2T(pPath), W2T(pObjectClass));
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// attempt to pick up the keys for the first element in the selection and get
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// the keys that map to that object
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hres = GetKeysForClass(pObjectClass,
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(pDsObjects->aObjects[0].dwFlags & DSOBJECT_ISCONTAINER),
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ARRAYSIZE(hKeys), hKeys);
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FailGracefully(hres, "Failed to get keys for class");
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hres = _OverrideProperties(pThreadData->hwndParent, pDataObject, hKeys, ARRAYSIZE(hKeys), pPrefix);
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FailGracefully(hres, "Failed when trying to call out for properties");
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// if the caller returns S_FALSE then we assume that they want us to display
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// the property pages for the given selection, so do so.
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if (hres == S_FALSE)
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{
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hres = CoCreateInstance(CLSID_Pathname, NULL, CLSCTX_INPROC_SERVER, IID_IADsPathname, (LPVOID*)&pPathname);
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FailGracefully(hres, "Failed to get the IADsPathname interface");
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hres = pPathname->Set(pPath, ADS_SETTYPE_FULL);
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FailGracefully(hres, "Failed to set the path of the name");
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pPathname->SetDisplayType(ADS_DISPLAY_VALUE_ONLY);
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pPathname->put_EscapedMode(ADS_ESCAPEDMODE_OFF_EX);
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hres = pPathname->Retrieve(ADS_FORMAT_LEAF, &bstrName);
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FailGracefully(hres, "Failed to get the leaf element");
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hres = FormatMsgResource(&pTitle,
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GLOBAL_HINSTANCE, (fSelection) ? IDS_LARGESEL:IDS_SINGLESEL,
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W2T(bstrName));
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FailGracefully(hres, "Failed to format dialog title");
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if (!SHOpenPropSheet(pTitle, hKeys, ARRAYSIZE(hKeys), NULL, pDataObject, NULL, NULL))
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ExitGracefully(hres, E_FAIL, "Failed to open property pages");
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}
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}
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hres = S_OK;
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exit_gracefully:
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ReleaseStgMedium(&mediumNames);
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ReleaseStgMedium(&mediumOptions);
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TidyKeys(ARRAYSIZE(hKeys), hKeys);
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LocalFreeString(&pTitle);
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SysFreeString(bstrName);
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DoRelease(pPathname);
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DoRelease(pDataObject);
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LocalFree(pThreadData);
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//
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// We need to shutdwn COM ultimately here as we don't
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// know how many times CoInitialize(NULL) has been called.
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// Otherwise COM is trying to shutdown itself inside compobj!DllMain,
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// while holding the loader lock which is causing a very bad deadlock.
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// For more information see bug #395293.
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//
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// However we need to brace this code as NT specific code because
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// otherwise it may cause problems with the Win9x DSUI client for
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// some weird reason.
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//
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ShutdownCOM();
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TraceLeave();
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DllRelease();
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ExitThread(0);
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return 0;
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}
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HRESULT ShowObjectProperties(HWND hwndParent, LPDATAOBJECT pDataObject)
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{
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HRESULT hres;
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PROPERTIESTHREADDATA* pThreadData;
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DWORD dwId;
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HANDLE hThread;
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TraceEnter(TRACE_UI, "ShowObjectProperties");
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// Allocate thread data for the new object we are launching
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pThreadData = (PROPERTIESTHREADDATA*)LocalAlloc(LPTR, SIZEOF(PROPERTIESTHREADDATA));
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TraceAssert(pThreadData);
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if (!pThreadData)
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ExitGracefully(hres, E_OUTOFMEMORY, "Failed to allocate thread data");
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// we have thread data lets fill it and spin the properties thread.
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pThreadData->hwndParent = hwndParent;
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hres = CoMarshalInterThreadInterfaceInStream(IID_IDataObject, pDataObject, &(pThreadData->pStream));
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FailGracefully(hres, "Failed to create marshaling object");
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DllAddRef();
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hThread = CreateThread(NULL, 0, _ShowObjectPropertiesThread, (LPVOID)pThreadData, 0, &dwId);
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TraceAssert(hThread);
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if (!hThread)
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{
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LocalFree(pThreadData);
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DllRelease();
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ExitGracefully(hres, E_UNEXPECTED, "Failed to kick off the thread");
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}
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CloseHandle(hThread);
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hres = S_OK;
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exit_gracefully:
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TraceLeaveResult(hres);
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}
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/*----------------------------------------------------------------------------
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/ IDsFolderProperties
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/----------------------------------------------------------------------------*/
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class CDsFolderProperties : public IDsFolderProperties
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{
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private:
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LONG _cRef;
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public:
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CDsFolderProperties();
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~CDsFolderProperties();
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// IUnknown
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STDMETHOD(QueryInterface)(REFIID riid, void **ppv);
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STDMETHOD_(ULONG, AddRef)();
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STDMETHOD_(ULONG, Release)();
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// IDsFolderProperties
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STDMETHOD(ShowProperties)(HWND hwndParent, IDataObject *pDataObject);
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};
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CDsFolderProperties::CDsFolderProperties() :
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_cRef(1)
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{
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DllAddRef();
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}
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CDsFolderProperties::~CDsFolderProperties()
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{
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DllRelease();
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}
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STDAPI CDsFolderProperties_CreateInstance(IUnknown* punkOuter, IUnknown** ppunk, LPCOBJECTINFO poi)
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{
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CDsFolderProperties *pdfp = new CDsFolderProperties();
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if (!pdfp)
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return E_OUTOFMEMORY;
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HRESULT hres = pdfp->QueryInterface(IID_IUnknown, (void **)ppunk);
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pdfp->Release();
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return hres;
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}
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// IUnknown
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HRESULT CDsFolderProperties::QueryInterface(REFIID riid, void **ppv)
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{
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static const QITAB qit[] =
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{
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QITABENT(CDsFolderProperties, IDsFolderProperties), // IID_IDsFolderProperties
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{0, 0 },
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};
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return QISearch(this, qit, riid, ppv);
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}
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ULONG CDsFolderProperties::AddRef()
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{
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return InterlockedIncrement(&_cRef);
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}
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ULONG CDsFolderProperties::Release()
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{
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if (InterlockedDecrement(&_cRef))
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return _cRef;
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delete this;
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return 0;
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}
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// Show the property UI for the given selection
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STDMETHODIMP CDsFolderProperties::ShowProperties(HWND hwndParent, IDataObject *pDataObject)
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{
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HRESULT hres;
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TraceEnter(TRACE_UI, "CDsFolderProperties::ShowProperties");
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if (!pDataObject)
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ExitGracefully(hres, E_INVALIDARG, "No pDataObject given");
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CoInitialize(NULL); // ensure we have COM
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hres = ShowObjectProperties(hwndParent, pDataObject);
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FailGracefully(hres, "Failed to open property pages");
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// hres = S_OK; // success
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exit_gracefully:
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TraceLeaveResult(hres);
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}
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