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shellole.c

/*
 *    handling of SHELL32.DLL OLE-Objects
 *
 *    Copyright 1997    Marcus Meissner
 *    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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"

#include <stdarg.h>
#include <stdlib.h>
#include <string.h>

#define COBJMACROS

#include "windef.h"
#include "winbase.h"
#include "shellapi.h"
#include "wingdi.h"
#include "winuser.h"
#include "shlobj.h"
#include "shlguid.h"
#include "winreg.h"
#include "winerror.h"

#include "undocshell.h"
#include "wine/unicode.h"
#include "shell32_main.h"

#include "wine/debug.h"
#include "shlwapi.h"
#include "debughlp.h"

WINE_DEFAULT_DEBUG_CHANNEL(shell);

extern INT WINAPI SHStringFromGUIDW(REFGUID guid, LPWSTR lpszDest, INT cchMax);  /* shlwapi.24 */

/**************************************************************************
 * Default ClassFactory types
 */
typedef HRESULT (CALLBACK *LPFNCREATEINSTANCE)(IUnknown* pUnkOuter, REFIID riid, LPVOID* ppvObject);
static IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst);

/* this table contains all CLSID's of shell32 objects */
static const struct {
      REFIID                  riid;
      LPFNCREATEINSTANCE      lpfnCI;
} InterfaceTable[] = {
      {&CLSID_ShellFSFolder,  IFSFolder_Constructor},
      {&CLSID_MyComputer,     ISF_MyComputer_Constructor},
      {&CLSID_NetworkPlaces,  ISF_NetworkPlaces_Constructor},
      {&CLSID_ShellDesktop,   ISF_Desktop_Constructor},
      {&CLSID_ShellItem,      IShellItem_Constructor},
      {&CLSID_ShellLink,      IShellLink_Constructor},
      {&CLSID_DragDropHelper, IDropTargetHelper_Constructor},
      {&CLSID_ControlPanel,   IControlPanel_Constructor},
      {&CLSID_AutoComplete,   IAutoComplete_Constructor},
      {&CLSID_UnixFolder,     UnixFolder_Constructor},
      {&CLSID_UnixDosFolder,  UnixDosFolder_Constructor},
      {&CLSID_FolderShortcut, FolderShortcut_Constructor},
      {&CLSID_MyDocuments,    MyDocuments_Constructor},
      {&CLSID_RecycleBin,     RecycleBin_Constructor},
      {&CLSID_QueryAssociations, QueryAssociations_Constructor},
      {NULL,NULL}
};



/*************************************************************************
 * SHCoCreateInstance [SHELL32.102]
 *
 * Equivalent to CoCreateInstance. Under Windows 9x this function could sometimes
 * use the shell32 built-in "mini-COM" without the need to load ole32.dll - see
 * SHLoadOLE for details.
 *
 * Under wine if a "LoadWithoutCOM" value is present or the object resides in
 * shell32.dll the function will load the object manually without the help of ole32
 *
 * NOTES
 *     exported by ordinal
 *
 * SEE ALSO
 *     CoCreateInstace, SHLoadOLE
 */
HRESULT WINAPI SHCoCreateInstance(
      LPCWSTR aclsid,
      const CLSID *clsid,
      LPUNKNOWN pUnkOuter,
      REFIID refiid,
      LPVOID *ppv)
{
      DWORD hres;
      IID   iid;
      const CLSID * myclsid = clsid;
      WCHAR sKeyName[MAX_PATH];
      const WCHAR sCLSID[7] = {'C','L','S','I','D','\\','\0'};
      WCHAR sClassID[60];
      const WCHAR sInProcServer32[16] ={'\\','I','n','p','r','o','c','S','e','r','v','e','r','3','2','\0'};
      const WCHAR sLoadWithoutCOM[15] ={'L','o','a','d','W','i','t','h','o','u','t','C','O','M','\0'};
      WCHAR sDllPath[MAX_PATH];
      HKEY  hKey = 0;
      DWORD dwSize;
      IClassFactory * pcf = NULL;

      if(!ppv) return E_POINTER;
      *ppv=NULL;

      /* if the clsid is a string, convert it */
      if (!clsid)
      {
        if (!aclsid) return REGDB_E_CLASSNOTREG;
        SHCLSIDFromStringW(aclsid, &iid);
        myclsid = &iid;
      }

      TRACE("(%p,%s,unk:%p,%s,%p)\n",
            aclsid,shdebugstr_guid(myclsid),pUnkOuter,shdebugstr_guid(refiid),ppv);

        if (SUCCEEDED(DllGetClassObject(myclsid, &IID_IClassFactory,(LPVOID*)&pcf)))
        {
            hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
            IClassFactory_Release(pcf);
            goto end;
        }

      /* we look up the dll path in the registry */
        SHStringFromGUIDW(myclsid, sClassID, sizeof(sClassID)/sizeof(WCHAR));
      lstrcpyW(sKeyName, sCLSID);
      lstrcatW(sKeyName, sClassID);
      lstrcatW(sKeyName, sInProcServer32);

      if (RegOpenKeyExW(HKEY_CLASSES_ROOT, sKeyName, 0, KEY_READ, &hKey))
            return E_ACCESSDENIED;

        /* if a special registry key is set, we load a shell extension without help of OLE32 */
        if (!SHQueryValueExW(hKey, sLoadWithoutCOM, 0, 0, 0, 0))
        {
          /* load an external dll without ole32 */
          HANDLE hLibrary;
          typedef HRESULT (CALLBACK *DllGetClassObjectFunc)(REFCLSID clsid, REFIID iid, LPVOID *ppv);
          DllGetClassObjectFunc DllGetClassObject;

            dwSize = sizeof(sDllPath);
            SHQueryValueExW(hKey, NULL, 0,0, sDllPath, &dwSize );

          if ((hLibrary = LoadLibraryExW(sDllPath, 0, LOAD_WITH_ALTERED_SEARCH_PATH)) == 0) {
              ERR("couldn't load InprocServer32 dll %s\n", debugstr_w(sDllPath));
            hres = E_ACCESSDENIED;
              goto end;
          } else if (!(DllGetClassObject = (DllGetClassObjectFunc)GetProcAddress(hLibrary, "DllGetClassObject"))) {
              ERR("couldn't find function DllGetClassObject in %s\n", debugstr_w(sDllPath));
              FreeLibrary( hLibrary );
            hres = E_ACCESSDENIED;
              goto end;
            } else if (FAILED(hres = DllGetClassObject(myclsid, &IID_IClassFactory, (LPVOID*)&pcf))) {
                TRACE("GetClassObject failed 0x%08x\n", hres);
                goto end;
          }

            hres = IClassFactory_CreateInstance(pcf, pUnkOuter, refiid, ppv);
            IClassFactory_Release(pcf);
      } else {

          /* load an external dll in the usual way */
          hres = CoCreateInstance(myclsid, pUnkOuter, CLSCTX_INPROC_SERVER, refiid, ppv);
      }

end:
        if (hKey) RegCloseKey(hKey);
      if(hres!=S_OK)
      {
        ERR("failed (0x%08x) to create CLSID:%s IID:%s\n",
              hres, shdebugstr_guid(myclsid), shdebugstr_guid(refiid));
        ERR("class not found in registry\n");
      }

      TRACE("-- instance: %p\n",*ppv);
      return hres;
}

/*************************************************************************
 * DllGetClassObject     [SHELL32.@]
 * SHDllGetClassObject   [SHELL32.128]
 */
HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
{
      HRESULT     hres = E_OUTOFMEMORY;
      IClassFactory * pcf = NULL;
      int i;

      TRACE("CLSID:%s,IID:%s\n",shdebugstr_guid(rclsid),shdebugstr_guid(iid));

      if (!ppv) return E_INVALIDARG;
      *ppv = NULL;

      /* search our internal interface table */
      for(i=0;InterfaceTable[i].riid;i++) {
          if(IsEqualIID(InterfaceTable[i].riid, rclsid)) {
              TRACE("index[%u]\n", i);
              pcf = IDefClF_fnConstructor(InterfaceTable[i].lpfnCI, NULL, NULL);
          }
      }

        if (!pcf) {
          FIXME("failed for CLSID=%s\n", shdebugstr_guid(rclsid));
          return CLASS_E_CLASSNOTAVAILABLE;
      }

      hres = IClassFactory_QueryInterface(pcf, iid, ppv);
      IClassFactory_Release(pcf);

      TRACE("-- pointer to class factory: %p\n",*ppv);
      return hres;
}

/*************************************************************************
 * SHCLSIDFromString                      [SHELL32.147]
 *
 * Under Windows 9x this was an ANSI version of CLSIDFromString. It also allowed
 * to avoid dependency on ole32.dll (see SHLoadOLE for details).
 *
 * Under Windows NT/2000/XP this is equivalent to CLSIDFromString
 *
 * NOTES
 *     exported by ordinal
 *
 * SEE ALSO
 *     CLSIDFromString, SHLoadOLE
 */
DWORD WINAPI SHCLSIDFromStringA (LPCSTR clsid, CLSID *id)
{
    WCHAR buffer[40];
    TRACE("(%p(%s) %p)\n", clsid, clsid, id);
    if (!MultiByteToWideChar( CP_ACP, 0, clsid, -1, buffer, sizeof(buffer)/sizeof(WCHAR) ))
        return CO_E_CLASSSTRING;
    return CLSIDFromString( buffer, id );
}
DWORD WINAPI SHCLSIDFromStringW (LPCWSTR clsid, CLSID *id)
{
      TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id);
      return CLSIDFromString((LPWSTR)clsid, id);
}
DWORD WINAPI SHCLSIDFromStringAW (LPCVOID clsid, CLSID *id)
{
      if (SHELL_OsIsUnicode())
        return SHCLSIDFromStringW (clsid, id);
      return SHCLSIDFromStringA (clsid, id);
}

/*************************************************************************
 *                 SHGetMalloc                  [SHELL32.@]
 *
 * Equivalent to CoGetMalloc(MEMCTX_TASK, ...). Under Windows 9x this function
 * could use the shell32 built-in "mini-COM" without the need to load ole32.dll -
 * see SHLoadOLE for details. 
 *
 * PARAMS
 *  lpmal [O] Destination for IMalloc interface.
 *
 * RETURNS
 *  Success: S_OK. lpmal contains the shells IMalloc interface.
 *  Failure. An HRESULT error code.
 *
 * SEE ALSO
 *  CoGetMalloc, SHLoadOLE
 */
HRESULT WINAPI SHGetMalloc(LPMALLOC *lpmal)
{
      TRACE("(%p)\n", lpmal);
      return CoGetMalloc(MEMCTX_TASK, lpmal);
}

/*************************************************************************
 * SHAlloc                          [SHELL32.196]
 *
 * Equivalent to CoTaskMemAlloc. Under Windows 9x this function could use
 * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 * see SHLoadOLE for details. 
 *
 * NOTES
 *     exported by ordinal
 *
 * SEE ALSO
 *     CoTaskMemAlloc, SHLoadOLE
 */
LPVOID WINAPI SHAlloc(DWORD len)
{
      LPVOID ret;

      ret = CoTaskMemAlloc(len);
      TRACE("%u bytes at %p\n",len, ret);
      return ret;
}

/*************************************************************************
 * SHFree                           [SHELL32.195]
 *
 * Equivalent to CoTaskMemFree. Under Windows 9x this function could use
 * the shell32 built-in "mini-COM" without the need to load ole32.dll -
 * see SHLoadOLE for details. 
 *
 * NOTES
 *     exported by ordinal
 *
 * SEE ALSO
 *     CoTaskMemFree, SHLoadOLE
 */
void WINAPI SHFree(LPVOID pv)
{
      TRACE("%p\n",pv);
      CoTaskMemFree(pv);
}

/*************************************************************************
 * SHGetDesktopFolder               [SHELL32.@]
 */
HRESULT WINAPI SHGetDesktopFolder(IShellFolder **psf)
{
      HRESULT     hres = S_OK;
      TRACE("\n");

      if(!psf) return E_INVALIDARG;
      *psf = NULL;
      hres = ISF_Desktop_Constructor(NULL, &IID_IShellFolder,(LPVOID*)psf);

      TRACE("-- %p->(%p)\n",psf, *psf);
      return hres;
}
/**************************************************************************
 * Default ClassFactory Implementation
 *
 * SHCreateDefClassObject
 *
 * NOTES
 *  Helper function for dlls without their own classfactory.
 *  A generic classfactory is returned.
 *  When the CreateInstance of the cf is called the callback is executed.
 */

typedef struct
{
    const IClassFactoryVtbl    *lpVtbl;
    LONG                        ref;
    CLSID               *rclsid;
    LPFNCREATEINSTANCE        lpfnCI;
    const IID *               riidInst;
    LONG *              pcRefDll; /* pointer to refcounter in external dll (ugrrr...) */
} IDefClFImpl;

static const IClassFactoryVtbl dclfvt;

/**************************************************************************
 *  IDefClF_fnConstructor
 */

static IClassFactory * IDefClF_fnConstructor(LPFNCREATEINSTANCE lpfnCI, PLONG pcRefDll, REFIID riidInst)
{
      IDefClFImpl* lpclf;

      lpclf = HeapAlloc(GetProcessHeap(),0,sizeof(IDefClFImpl));
      lpclf->ref = 1;
      lpclf->lpVtbl = &dclfvt;
      lpclf->lpfnCI = lpfnCI;
      lpclf->pcRefDll = pcRefDll;

      if (pcRefDll) InterlockedIncrement(pcRefDll);
      lpclf->riidInst = riidInst;

      TRACE("(%p)%s\n",lpclf, shdebugstr_guid(riidInst));
      return (LPCLASSFACTORY)lpclf;
}
/**************************************************************************
 *  IDefClF_fnQueryInterface
 */
static HRESULT WINAPI IDefClF_fnQueryInterface(
  LPCLASSFACTORY iface, REFIID riid, LPVOID *ppvObj)
{
      IDefClFImpl *This = (IDefClFImpl *)iface;

      TRACE("(%p)->(%s)\n",This,shdebugstr_guid(riid));

      *ppvObj = NULL;

      if(IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IClassFactory)) {
        *ppvObj = This;
        InterlockedIncrement(&This->ref);
        return S_OK;
      }

      TRACE("-- E_NOINTERFACE\n");
      return E_NOINTERFACE;
}
/******************************************************************************
 * IDefClF_fnAddRef
 */
static ULONG WINAPI IDefClF_fnAddRef(LPCLASSFACTORY iface)
{
      IDefClFImpl *This = (IDefClFImpl *)iface;
      ULONG refCount = InterlockedIncrement(&This->ref);

      TRACE("(%p)->(count=%u)\n", This, refCount - 1);

      return refCount;
}
/******************************************************************************
 * IDefClF_fnRelease
 */
static ULONG WINAPI IDefClF_fnRelease(LPCLASSFACTORY iface)
{
      IDefClFImpl *This = (IDefClFImpl *)iface;
      ULONG refCount = InterlockedDecrement(&This->ref);
      
      TRACE("(%p)->(count=%u)\n", This, refCount + 1);

      if (!refCount)
      {
        if (This->pcRefDll) InterlockedDecrement(This->pcRefDll);

        TRACE("-- destroying IClassFactory(%p)\n",This);
        HeapFree(GetProcessHeap(),0,This);
        return 0;
      }
      return refCount;
}
/******************************************************************************
 * IDefClF_fnCreateInstance
 */
static HRESULT WINAPI IDefClF_fnCreateInstance(
  LPCLASSFACTORY iface, LPUNKNOWN pUnkOuter, REFIID riid, LPVOID *ppvObject)
{
      IDefClFImpl *This = (IDefClFImpl *)iface;

      TRACE("%p->(%p,%s,%p)\n",This,pUnkOuter,shdebugstr_guid(riid),ppvObject);

      *ppvObject = NULL;

      if ( This->riidInst==NULL ||
           IsEqualCLSID(riid, This->riidInst) ||
           IsEqualCLSID(riid, &IID_IUnknown) )
      {
        return This->lpfnCI(pUnkOuter, riid, ppvObject);
      }

      ERR("unknown IID requested %s\n",shdebugstr_guid(riid));
      return E_NOINTERFACE;
}
/******************************************************************************
 * IDefClF_fnLockServer
 */
static HRESULT WINAPI IDefClF_fnLockServer(LPCLASSFACTORY iface, BOOL fLock)
{
      IDefClFImpl *This = (IDefClFImpl *)iface;
      TRACE("%p->(0x%x), not implemented\n",This, fLock);
      return E_NOTIMPL;
}

static const IClassFactoryVtbl dclfvt =
{
    IDefClF_fnQueryInterface,
    IDefClF_fnAddRef,
  IDefClF_fnRelease,
  IDefClF_fnCreateInstance,
  IDefClF_fnLockServer
};

/******************************************************************************
 * SHCreateDefClassObject                 [SHELL32.70]
 */
HRESULT WINAPI SHCreateDefClassObject(
      REFIID      riid,
      LPVOID*     ppv,
      LPFNCREATEINSTANCE lpfnCI,    /* [in] create instance callback entry */
      LPDWORD     pcRefDll,         /* [in/out] ref count of the dll */
      REFIID      riidInst)         /* [in] optional interface to the instance */
{
      IClassFactory * pcf;

      TRACE("%s %p %p %p %s\n",
              shdebugstr_guid(riid), ppv, lpfnCI, pcRefDll, shdebugstr_guid(riidInst));

      if (! IsEqualCLSID(riid, &IID_IClassFactory) ) return E_NOINTERFACE;
      if (! (pcf = IDefClF_fnConstructor(lpfnCI, (PLONG)pcRefDll, riidInst))) return E_OUTOFMEMORY;
      *ppv = pcf;
      return NOERROR;
}

/*************************************************************************
 *  DragAcceptFiles           [SHELL32.@]
 */
void WINAPI DragAcceptFiles(HWND hWnd, BOOL b)
{
      LONG exstyle;

      if( !IsWindow(hWnd) ) return;
      exstyle = GetWindowLongA(hWnd,GWL_EXSTYLE);
      if (b)
        exstyle |= WS_EX_ACCEPTFILES;
      else
        exstyle &= ~WS_EX_ACCEPTFILES;
      SetWindowLongA(hWnd,GWL_EXSTYLE,exstyle);
}

/*************************************************************************
 * DragFinish           [SHELL32.@]
 */
void WINAPI DragFinish(HDROP h)
{
      TRACE("\n");
      GlobalFree(h);
}

/*************************************************************************
 * DragQueryPoint       [SHELL32.@]
 */
BOOL WINAPI DragQueryPoint(HDROP hDrop, POINT *p)
{
        DROPFILES *lpDropFileStruct;
      BOOL bRet;

      TRACE("\n");

      lpDropFileStruct = GlobalLock(hDrop);

        *p = lpDropFileStruct->pt;
      bRet = lpDropFileStruct->fNC;

      GlobalUnlock(hDrop);
      return bRet;
}

/*************************************************************************
 *  DragQueryFileA            [SHELL32.@]
 *  DragQueryFile             [SHELL32.@]
 */
UINT WINAPI DragQueryFileA(
      HDROP hDrop,
      UINT lFile,
      LPSTR lpszFile,
      UINT lLength)
{
      LPSTR lpDrop;
      UINT i = 0;
      DROPFILES *lpDropFileStruct = GlobalLock(hDrop);

      TRACE("(%p, %x, %p, %u)\n",   hDrop,lFile,lpszFile,lLength);

      if(!lpDropFileStruct) goto end;

      lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->pFiles;

        if(lpDropFileStruct->fWide) {
            LPWSTR lpszFileW = NULL;

            if(lpszFile) {
                lpszFileW = HeapAlloc(GetProcessHeap(), 0, lLength*sizeof(WCHAR));
                if(lpszFileW == NULL) {
                    goto end;
                }
            }
            i = DragQueryFileW(hDrop, lFile, lpszFileW, lLength);

            if(lpszFileW) {
                WideCharToMultiByte(CP_ACP, 0, lpszFileW, -1, lpszFile, lLength, 0, NULL);
                HeapFree(GetProcessHeap(), 0, lpszFileW);
            }
            goto end;
        }

      while (i++ < lFile)
      {
        while (*lpDrop++); /* skip filename */
        if (!*lpDrop)
        {
          i = (lFile == 0xFFFFFFFF) ? i : 0;
          goto end;
        }
      }

      i = strlen(lpDrop);
      if (!lpszFile ) goto end;   /* needed buffer size */
      lstrcpynA (lpszFile, lpDrop, lLength);
end:
      GlobalUnlock(hDrop);
      return i;
}

/*************************************************************************
 *  DragQueryFileW            [SHELL32.@]
 */
UINT WINAPI DragQueryFileW(
      HDROP hDrop,
      UINT lFile,
      LPWSTR lpszwFile,
      UINT lLength)
{
      LPWSTR lpwDrop;
      UINT i = 0;
      DROPFILES *lpDropFileStruct = GlobalLock(hDrop);

      TRACE("(%p, %x, %p, %u)\n", hDrop,lFile,lpszwFile,lLength);

      if(!lpDropFileStruct) goto end;

      lpwDrop = (LPWSTR) ((LPSTR)lpDropFileStruct + lpDropFileStruct->pFiles);

        if(lpDropFileStruct->fWide == FALSE) {
            LPSTR lpszFileA = NULL;

            if(lpszwFile) {
                lpszFileA = HeapAlloc(GetProcessHeap(), 0, lLength);
                if(lpszFileA == NULL) {
                    goto end;
                }
            }
            i = DragQueryFileA(hDrop, lFile, lpszFileA, lLength);

            if(lpszFileA) {
                MultiByteToWideChar(CP_ACP, 0, lpszFileA, -1, lpszwFile, lLength);
                HeapFree(GetProcessHeap(), 0, lpszFileA);
            }
            goto end;
        }

      i = 0;
      while (i++ < lFile)
      {
        while (*lpwDrop++); /* skip filename */
        if (!*lpwDrop)
        {
          i = (lFile == 0xFFFFFFFF) ? i : 0;
          goto end;
        }
      }

      i = strlenW(lpwDrop);
      if ( !lpszwFile) goto end;   /* needed buffer size */
      lstrcpynW (lpszwFile, lpwDrop, lLength);
end:
      GlobalUnlock(hDrop);
      return i;
}

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