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Sweden-Number/dlls/shell32/enumidlist.c

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/*
* IEnumIDList
*
* Copyright 1998 Juergen Schmied <juergen.schmied@metronet.de>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include "wine/debug.h"
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "undocshell.h"
#include "shlwapi.h"
#include "winerror.h"
#include "objbase.h"
#include "pidl.h"
#include "shlguid.h"
#include "enumidlist.h"
WINE_DEFAULT_DEBUG_CHANNEL(shell);
typedef struct tagENUMLIST
{
struct tagENUMLIST *pNext;
LPITEMIDLIST pidl;
} ENUMLIST, *LPENUMLIST;
typedef struct
{
IEnumIDListVtbl *lpVtbl;
DWORD ref;
LPENUMLIST mpFirst;
LPENUMLIST mpLast;
LPENUMLIST mpCurrent;
} IEnumIDListImpl;
static struct IEnumIDListVtbl eidlvt;
/**************************************************************************
* AddToEnumList()
*/
BOOL AddToEnumList(
IEnumIDList * iface,
LPITEMIDLIST pidl)
{
ICOM_THIS(IEnumIDListImpl,iface);
LPENUMLIST pNew;
TRACE("(%p)->(pidl=%p)\n",This,pidl);
if (!iface || !pidl)
return FALSE;
pNew = (LPENUMLIST)SHAlloc(sizeof(ENUMLIST));
if(pNew)
{
/*set the next pointer */
pNew->pNext = NULL;
pNew->pidl = pidl;
/*is This the first item in the list? */
if(!This->mpFirst)
{
This->mpFirst = pNew;
This->mpCurrent = pNew;
}
if(This->mpLast)
{
/*add the new item to the end of the list */
This->mpLast->pNext = pNew;
}
/*update the last item pointer */
This->mpLast = pNew;
TRACE("-- (%p)->(first=%p, last=%p)\n",This,This->mpFirst,This->mpLast);
return TRUE;
}
return FALSE;
}
/**************************************************************************
* CreateFolderEnumList()
*/
BOOL CreateFolderEnumList(
IEnumIDList *list,
LPCSTR lpszPath,
DWORD dwFlags)
{
LPITEMIDLIST pidl=NULL;
WIN32_FIND_DATAA stffile;
HANDLE hFile;
CHAR szPath[MAX_PATH];
BOOL succeeded = TRUE;
TRACE("(%p)->(path=%s flags=0x%08lx) \n",list,debugstr_a(lpszPath),dwFlags);
if(!lpszPath || !lpszPath[0]) return FALSE;
strcpy(szPath, lpszPath);
PathAddBackslashA(szPath);
strcat(szPath,"*.*");
hFile = FindFirstFileA(szPath,&stffile);
if ( hFile != INVALID_HANDLE_VALUE )
{
BOOL findFinished = FALSE;
do
{
if ( !(stffile.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN)
|| (dwFlags & SHCONTF_INCLUDEHIDDEN) )
{
if ( (stffile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
dwFlags & SHCONTF_FOLDERS &&
strcmp (stffile.cFileName, ".") && strcmp (stffile.cFileName, ".."))
{
pidl = _ILCreateFromFindDataA(&stffile);
succeeded = succeeded && AddToEnumList(list, pidl);
}
else if (!(stffile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
&& dwFlags & SHCONTF_NONFOLDERS)
{
pidl = _ILCreateFromFindDataA(&stffile);
succeeded = succeeded && AddToEnumList(list, pidl);
}
}
if (succeeded)
{
if (!FindNextFileA(hFile, &stffile))
{
if (GetLastError() == ERROR_NO_MORE_FILES)
findFinished = TRUE;
else
succeeded = FALSE;
}
}
} while (succeeded && !findFinished);
FindClose(hFile);
}
return succeeded;
}
/**************************************************************************
* DeleteList()
*/
static BOOL DeleteList(
IEnumIDList * iface)
{
ICOM_THIS(IEnumIDListImpl,iface);
LPENUMLIST pDelete;
TRACE("(%p)->()\n",This);
while(This->mpFirst)
{ pDelete = This->mpFirst;
This->mpFirst = pDelete->pNext;
SHFree(pDelete->pidl);
SHFree(pDelete);
}
This->mpFirst = This->mpLast = This->mpCurrent = NULL;
return TRUE;
}
/**************************************************************************
* IEnumIDList_Folder_Constructor
*
*/
IEnumIDList * IEnumIDList_Constructor(void)
{
IEnumIDListImpl *lpeidl = (IEnumIDListImpl*)HeapAlloc(GetProcessHeap(),
HEAP_ZERO_MEMORY, sizeof(IEnumIDListImpl));
if (lpeidl)
{
lpeidl->ref = 1;
lpeidl->lpVtbl = &eidlvt;
}
TRACE("-- (%p)->()\n",lpeidl);
return (IEnumIDList*)lpeidl;
}
/**************************************************************************
* EnumIDList_QueryInterface
*/
static HRESULT WINAPI IEnumIDList_fnQueryInterface(
IEnumIDList * iface,
REFIID riid,
LPVOID *ppvObj)
{
ICOM_THIS(IEnumIDListImpl,iface);
TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
*ppvObj = NULL;
if(IsEqualIID(riid, &IID_IUnknown)) /*IUnknown*/
{ *ppvObj = This;
}
else if(IsEqualIID(riid, &IID_IEnumIDList)) /*IEnumIDList*/
{ *ppvObj = (IEnumIDList*)This;
}
if(*ppvObj)
{ IEnumIDList_AddRef((IEnumIDList*)*ppvObj);
TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
return S_OK;
}
TRACE("-- Interface: E_NOINTERFACE\n");
return E_NOINTERFACE;
}
/******************************************************************************
* IEnumIDList_fnAddRef
*/
static ULONG WINAPI IEnumIDList_fnAddRef(
IEnumIDList * iface)
{
ICOM_THIS(IEnumIDListImpl,iface);
TRACE("(%p)->(%lu)\n",This,This->ref);
return ++(This->ref);
}
/******************************************************************************
* IEnumIDList_fnRelease
*/
static ULONG WINAPI IEnumIDList_fnRelease(
IEnumIDList * iface)
{
ICOM_THIS(IEnumIDListImpl,iface);
TRACE("(%p)->(%lu)\n",This,This->ref);
if (!--(This->ref)) {
TRACE(" destroying IEnumIDList(%p)\n",This);
DeleteList((IEnumIDList*)This);
HeapFree(GetProcessHeap(),0,This);
return 0;
}
return This->ref;
}
/**************************************************************************
* IEnumIDList_fnNext
*/
static HRESULT WINAPI IEnumIDList_fnNext(
IEnumIDList * iface,
ULONG celt,
LPITEMIDLIST * rgelt,
ULONG *pceltFetched)
{
ICOM_THIS(IEnumIDListImpl,iface);
ULONG i;
HRESULT hr = S_OK;
LPITEMIDLIST temp;
TRACE("(%p)->(%ld,%p, %p)\n",This,celt,rgelt,pceltFetched);
/* It is valid to leave pceltFetched NULL when celt is 1. Some of explorer's
* subsystems actually use it (and so may a third party browser)
*/
if(pceltFetched)
*pceltFetched = 0;
*rgelt=0;
if(celt > 1 && !pceltFetched)
{ return E_INVALIDARG;
}
if(celt > 0 && !This->mpCurrent)
{ return S_FALSE;
}
for(i = 0; i < celt; i++)
{ if(!(This->mpCurrent))
break;
temp = ILClone(This->mpCurrent->pidl);
rgelt[i] = temp;
This->mpCurrent = This->mpCurrent->pNext;
}
if(pceltFetched)
{ *pceltFetched = i;
}
return hr;
}
/**************************************************************************
* IEnumIDList_fnSkip
*/
static HRESULT WINAPI IEnumIDList_fnSkip(
IEnumIDList * iface,ULONG celt)
{
ICOM_THIS(IEnumIDListImpl,iface);
DWORD dwIndex;
HRESULT hr = S_OK;
TRACE("(%p)->(%lu)\n",This,celt);
for(dwIndex = 0; dwIndex < celt; dwIndex++)
{ if(!This->mpCurrent)
{ hr = S_FALSE;
break;
}
This->mpCurrent = This->mpCurrent->pNext;
}
return hr;
}
/**************************************************************************
* IEnumIDList_fnReset
*/
static HRESULT WINAPI IEnumIDList_fnReset(
IEnumIDList * iface)
{
ICOM_THIS(IEnumIDListImpl,iface);
TRACE("(%p)\n",This);
This->mpCurrent = This->mpFirst;
return S_OK;
}
/**************************************************************************
* IEnumIDList_fnClone
*/
static HRESULT WINAPI IEnumIDList_fnClone(
IEnumIDList * iface,LPENUMIDLIST * ppenum)
{
ICOM_THIS(IEnumIDListImpl,iface);
TRACE("(%p)->() to (%p)->() E_NOTIMPL\n",This,ppenum);
return E_NOTIMPL;
}
/**************************************************************************
* IEnumIDList_fnVTable
*/
static IEnumIDListVtbl eidlvt =
{
ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
IEnumIDList_fnQueryInterface,
IEnumIDList_fnAddRef,
IEnumIDList_fnRelease,
IEnumIDList_fnNext,
IEnumIDList_fnSkip,
IEnumIDList_fnReset,
IEnumIDList_fnClone,
};
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