517 lines
10 KiB
C++
517 lines
10 KiB
C++
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/*++
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Implements IEnumIDList.
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--*/
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#include <windows.h>
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#include <shlobj.h>
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#include "pstore.h"
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#include "utility.h"
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#include "enumid.h"
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#include "shfolder.h"
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extern LONG g_DllRefCount;
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CEnumIDList::CEnumIDList(
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LPITEMIDLIST pidl,
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BOOL bEnumItems
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)
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{
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m_pIEnumProviders = NULL;
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m_pIPStoreProvider = NULL;
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m_pIEnumTypes = NULL;
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m_pIEnumTypesGlobal = NULL;
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m_pIEnumSubtypes = NULL;
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m_pIEnumItems = NULL;
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m_bEnumItems = bEnumItems;
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//
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// get the shell's IMalloc pointer
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// we'll keep this until we get destroyed
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//
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if(FAILED(SHGetMalloc(&m_pMalloc)))
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delete this;
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m_KeyType = PST_KEY_CURRENT_USER;
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if(pidl == NULL) {
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if( PStoreEnumProviders(0, &m_pIEnumProviders) != S_OK )
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m_pIEnumProviders = NULL;
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m_dwType = PIDL_TYPE_PROVIDER; // top-level
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} else {
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m_dwType = GetLastPidlType(pidl) + 1; // parent + 1
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}
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//
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// get provider interface
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//
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if(m_dwType > PIDL_TYPE_PROVIDER) {
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PST_PROVIDERID *ProviderId = GetPidlGuid(pidl);
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if(PStoreCreateInstance(&m_pIPStoreProvider, ProviderId, NULL, 0) != S_OK)
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m_pIPStoreProvider = NULL;
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}
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//
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// prepare two type enumerators, if appropriate:
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// PST_KEY_CURRENT_USER and PST_KEY_LOCAL_MACHINE
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//
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if(m_dwType == PIDL_TYPE_TYPE && m_pIPStoreProvider) {
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m_pIPStoreProvider->EnumTypes(PST_KEY_CURRENT_USER, 0, &m_pIEnumTypes);
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m_pIPStoreProvider->EnumTypes(PST_KEY_LOCAL_MACHINE, 0, &m_pIEnumTypesGlobal);
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}
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//
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// prepare subtype enumerator
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//
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if(m_dwType == PIDL_TYPE_SUBTYPE && m_pIPStoreProvider) {
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GUID *pguidType;
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m_KeyType = GetLastPidlKeyType(pidl);
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pguidType = GetLastPidlGuid(pidl);
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CopyMemory(&m_guidType, pguidType, sizeof(GUID));
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m_pIPStoreProvider->EnumSubtypes(
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m_KeyType,
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pguidType,
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0,
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&m_pIEnumSubtypes
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);
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}
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//
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// prepare item enumerator if appropriate.
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//
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if(m_dwType == PIDL_TYPE_ITEM && m_bEnumItems && m_pIPStoreProvider) {
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GUID *pguidType;
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GUID *pguidSubtype;
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m_KeyType = GetLastPidlKeyType(pidl);
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pguidSubtype = GetLastPidlGuid(pidl);
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CopyMemory(&m_guidSubtype, pguidSubtype, sizeof(GUID));
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pguidType = GetPidlGuid(SearchPidlByType(pidl, PIDL_TYPE_TYPE));
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CopyMemory(&m_guidType, pguidType, sizeof(GUID));
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m_pIPStoreProvider->EnumItems(
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m_KeyType,
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pguidType,
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pguidSubtype,
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0,
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&m_pIEnumItems
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);
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}
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m_ulCurrent = 0;
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m_ObjRefCount = 1;
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InterlockedIncrement(&g_DllRefCount);
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}
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CEnumIDList::~CEnumIDList()
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{
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//
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// free any interfaces we established.
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//
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if(m_pIEnumProviders) {
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m_pIEnumProviders->Release();
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m_pIEnumProviders = NULL;
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}
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if(m_pIPStoreProvider) {
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m_pIPStoreProvider->Release();
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m_pIPStoreProvider = NULL;
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}
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if(m_pIEnumTypes) {
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m_pIEnumTypes->Release();
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m_pIEnumTypes = NULL;
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}
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if(m_pIEnumTypesGlobal) {
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m_pIEnumTypesGlobal->Release();
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m_pIEnumTypesGlobal = NULL;
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}
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if(m_pIEnumSubtypes) {
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m_pIEnumSubtypes->Release();
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m_pIEnumSubtypes = NULL;
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}
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if(m_pIEnumItems) {
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m_pIEnumItems->Release();
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m_pIEnumItems = NULL;
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}
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if(m_pMalloc) {
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m_pMalloc->Release();
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m_pMalloc = NULL;
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}
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InterlockedDecrement(&g_DllRefCount);
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}
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STDMETHODIMP
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CEnumIDList::QueryInterface(
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REFIID riid,
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LPVOID *ppReturn
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)
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{
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*ppReturn = NULL;
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if(IsEqualIID(riid, IID_IUnknown))
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*ppReturn = (IUnknown*)(CEnumIDList*)this;
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else if(IsEqualIID(riid, IID_IEnumIDList))
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*ppReturn = (CEnumIDList*)this;
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if(*ppReturn == NULL)
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return E_NOINTERFACE;
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(*(LPUNKNOWN*)ppReturn)->AddRef();
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return S_OK;
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}
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STDMETHODIMP_(DWORD)
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CEnumIDList::AddRef()
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{
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return InterlockedIncrement(&m_ObjRefCount);
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}
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STDMETHODIMP_(DWORD)
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CEnumIDList::Release()
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{
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LONG lDecremented = InterlockedDecrement(&m_ObjRefCount);
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if(lDecremented == 0)
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delete this;
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return lDecremented;
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}
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STDMETHODIMP
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CEnumIDList::Next(
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ULONG ulElements,
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LPITEMIDLIST *pPidl,
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ULONG *pulFetched
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)
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/*++
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Retrieves the specified number of item identifiers in the enumeration
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sequence and advances the current position.
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Returns the NOERROR value if successful,
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Returns S_FALSE value if there are no more items in the enumeration
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or an OLE-defined error value if an error occurs.
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--*/
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{
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HRESULT hr;
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*pPidl = NULL;
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*pulFetched = 0;
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if(m_bEnumItems) {
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if(m_dwType > PIDL_TYPE_ITEM)
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return S_FALSE;
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} else {
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if(m_dwType > PIDL_TYPE_SUBTYPE)
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return S_FALSE; // nothing left to enumerate
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}
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if(m_dwType == PIDL_TYPE_PROVIDER && m_pIEnumProviders)
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{
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PPST_PROVIDERINFO pProvInfo;
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if( m_pIEnumProviders->Next(1, &pProvInfo, &m_ulCurrent) != S_OK ) {
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//
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// enumeration of providers complete
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//
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return S_FALSE;
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}
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hr = CreateIDList(m_dwType, m_KeyType, &(pProvInfo->ID), pProvInfo->szProviderName, pPidl);
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CoTaskMemFree(pProvInfo);
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if(hr != S_OK)
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return S_FALSE;
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*pulFetched = 1;
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return NOERROR;
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}
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//
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// must have a valid provider interface at this point
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//
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if(m_pIPStoreProvider == NULL)
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return S_FALSE;
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if(m_dwType == PIDL_TYPE_TYPE) {
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IEnumPStoreTypes *pIEnumTypes;
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PST_KEY KeyType = PST_KEY_CURRENT_USER;
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GUID guidType;
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type_enum:
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if(KeyType == PST_KEY_LOCAL_MACHINE)
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pIEnumTypes = m_pIEnumTypesGlobal;
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else
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pIEnumTypes = m_pIEnumTypes;
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if(pIEnumTypes == NULL)
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return S_FALSE;
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if(pIEnumTypes->Next(1, &guidType, &m_ulCurrent) != S_OK) {
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//
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// if enumeration at PST_KEY_CURRENT_USER level complete,
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// continue at the PST_KEY_LOCAL_MACHINE level.
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//
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if(KeyType == PST_KEY_CURRENT_USER) {
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KeyType = PST_KEY_LOCAL_MACHINE;
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goto type_enum;
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}
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//
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// enumeration of types complete
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//
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return S_FALSE;
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}
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PST_TYPEINFO *pTypeInfo = NULL;
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if(S_OK != m_pIPStoreProvider->GetTypeInfo(
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KeyType,
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&guidType,
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&pTypeInfo,
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0
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)) return S_FALSE;
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hr = CreateIDList(m_dwType, KeyType, &guidType, pTypeInfo->szDisplayName, pPidl);
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//
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// free pTypeInfo data
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//
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CoTaskMemFree(pTypeInfo);
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if(hr != S_OK)
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return S_FALSE;
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*pulFetched = 1;
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return NOERROR;
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}
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if (m_dwType == PIDL_TYPE_SUBTYPE && m_pIEnumSubtypes) {
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GUID guidSubtype;
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GUID *pguidType = &m_guidType;
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if(m_pIEnumSubtypes->Next(1, &guidSubtype, &m_ulCurrent) != S_OK) {
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//
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// enumeration of types complete
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//
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return S_FALSE;
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}
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PST_TYPEINFO *pTypeInfo = NULL;
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if(m_pIPStoreProvider->GetSubtypeInfo(m_KeyType, pguidType, &guidSubtype, &pTypeInfo, 0) != S_OK)
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return S_FALSE;
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hr = CreateIDList(m_dwType, m_KeyType, &guidSubtype, pTypeInfo->szDisplayName, pPidl);
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//
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// free pTypeInfo data
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//
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CoTaskMemFree(pTypeInfo);
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if(hr != S_OK)
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return S_FALSE;
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*pulFetched = 1;
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return NOERROR;
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}
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if(m_dwType == PIDL_TYPE_ITEM && m_pIEnumItems) {
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LPWSTR pszItem;
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//
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// enumerate and add items associated with specified subtype
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//
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if(m_pIEnumItems->Next(1, &pszItem, &m_ulCurrent) != S_OK) {
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//
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// enumeration of items complete
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//
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return S_FALSE;
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}
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hr = CreateIDList(
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m_dwType,
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m_KeyType,
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NULL, // no item guid
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pszItem,
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pPidl
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);
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//
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// free pszItem data
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//
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CoTaskMemFree(pszItem);
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if(hr != S_OK)
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return S_FALSE;
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*pulFetched = 1;
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return NOERROR;
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}
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return S_FALSE;
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}
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STDMETHODIMP
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CEnumIDList::CreateIDList(
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DWORD dwType,
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PST_KEY KeyType,
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GUID *guid,
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LPCWSTR szString,
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LPITEMIDLIST *pPidlOut
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)
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{
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DWORD cbString = 0;
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DWORD cbPidlContent;
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if(szString) {
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cbString = lstrlenW(szString);
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}
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||
|
|
cbString = (cbString + 1) * sizeof(WCHAR);
|
||
|
|
|
||
|
|
cbPidlContent = sizeof(PIDL_CONTENT) + cbString;
|
||
|
|
|
||
|
|
//
|
||
|
|
// allocate the memory
|
||
|
|
//
|
||
|
|
|
||
|
|
*pPidlOut = (LPITEMIDLIST)m_pMalloc->Alloc(
|
||
|
|
sizeof(ITEMIDLIST) + // this item's ITEMIDLIST
|
||
|
|
cbPidlContent + // this item's data
|
||
|
|
sizeof(ITEMIDLIST) // terminal ITEMIDLIST
|
||
|
|
);
|
||
|
|
|
||
|
|
if(*pPidlOut == NULL)
|
||
|
|
return E_OUTOFMEMORY;
|
||
|
|
|
||
|
|
|
||
|
|
LPITEMIDLIST pidlTemp = *pPidlOut;
|
||
|
|
LPPIDL_CONTENT pidlContent = (LPPIDL_CONTENT)&(pidlTemp->mkid.abID);
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// set the size of this item
|
||
|
|
//
|
||
|
|
|
||
|
|
pidlTemp->mkid.cb = (unsigned short)(sizeof(ITEMIDLIST) + cbPidlContent);
|
||
|
|
|
||
|
|
//
|
||
|
|
// set the data for this item
|
||
|
|
//
|
||
|
|
|
||
|
|
pidlContent->dwType = dwType;
|
||
|
|
pidlContent->KeyType = KeyType;
|
||
|
|
|
||
|
|
if( guid ) {
|
||
|
|
CopyMemory(&(pidlContent->guid), guid, sizeof(GUID));
|
||
|
|
} else {
|
||
|
|
ZeroMemory(&(pidlContent->guid), sizeof(GUID));
|
||
|
|
}
|
||
|
|
|
||
|
|
if(szString) {
|
||
|
|
CopyMemory((LPBYTE)(pidlContent+1), szString, cbString);
|
||
|
|
} else {
|
||
|
|
((LPWSTR)(pidlContent+1))[0] = L'\0';
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// advance and terminate item ID list
|
||
|
|
//
|
||
|
|
|
||
|
|
pidlTemp = (LPITEMIDLIST)GetPidlNextItem(*pPidlOut);
|
||
|
|
pidlTemp->mkid.cb = 0;
|
||
|
|
pidlTemp->mkid.abID[0] = 0;
|
||
|
|
|
||
|
|
return NOERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
STDMETHODIMP
|
||
|
|
CEnumIDList::Skip(
|
||
|
|
ULONG ulSkip
|
||
|
|
)
|
||
|
|
{
|
||
|
|
m_ulCurrent += ulSkip;
|
||
|
|
|
||
|
|
return NOERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
STDMETHODIMP
|
||
|
|
CEnumIDList::Reset(
|
||
|
|
void
|
||
|
|
)
|
||
|
|
{
|
||
|
|
m_ulCurrent = 0;
|
||
|
|
|
||
|
|
return NOERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
STDMETHODIMP
|
||
|
|
CEnumIDList::Clone(
|
||
|
|
LPENUMIDLIST *ppEnum
|
||
|
|
)
|
||
|
|
{
|
||
|
|
return E_NOTIMPL;
|
||
|
|
}
|