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wine/dlls/shell32/shlfolder.c
Ulrich Czekalla 32a4ac1629 shell32: Revert c1f2824429. It caused poor performance. 
Patch c1f2824429 causes poor performance
when browsing a directory. In fact it has a side affect that when you
browse the root folder off of My Computer it will enumerate not only
the root's contents but each subfolder's contents as well in order to
get a more likely correct value for SFGAO_HASSUBFOLDER.
2008-09-30 11:32:50 -05:00

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/*
* Shell Folder stuff
*
* Copyright 1997 Marcus Meissner
* Copyright 1998, 1999, 2002 Juergen Schmied
*
* IShellFolder2 and related interfaces
*
* 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 "wine/port.h"
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#define COBJMACROS
#include "winerror.h"
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "wingdi.h"
#include "winuser.h"
#include "ole2.h"
#include "shlguid.h"
#include "pidl.h"
#include "undocshell.h"
#include "shell32_main.h"
#include "shlwapi.h"
#include "wine/debug.h"
#include "shfldr.h"
WINE_DEFAULT_DEBUG_CHANNEL (shell);
static const WCHAR wszDotShellClassInfo[] = {
'.','S','h','e','l','l','C','l','a','s','s','I','n','f','o',0};
/***************************************************************************
* SHELL32_GetCustomFolderAttribute (internal function)
*
* Gets a value from the folder's desktop.ini file, if one exists.
*
* PARAMETERS
* pidl [I] Folder containing the desktop.ini file.
* pwszHeading [I] Heading in .ini file.
* pwszAttribute [I] Attribute in .ini file.
* pwszValue [O] Buffer to store value into.
* cchValue [I] Size in characters including NULL of buffer pointed to
* by pwszValue.
*
* RETURNS
* TRUE if returned non-NULL value.
* FALSE otherwise.
*/
static inline BOOL SHELL32_GetCustomFolderAttributeFromPath(
LPWSTR pwszFolderPath, LPCWSTR pwszHeading, LPCWSTR pwszAttribute,
LPWSTR pwszValue, DWORD cchValue)
{
static const WCHAR wszDesktopIni[] =
{'d','e','s','k','t','o','p','.','i','n','i',0};
static const WCHAR wszDefault[] = {0};
PathAddBackslashW(pwszFolderPath);
PathAppendW(pwszFolderPath, wszDesktopIni);
return GetPrivateProfileStringW(pwszHeading, pwszAttribute, wszDefault,
pwszValue, cchValue, pwszFolderPath);
}
BOOL SHELL32_GetCustomFolderAttribute(
LPCITEMIDLIST pidl, LPCWSTR pwszHeading, LPCWSTR pwszAttribute,
LPWSTR pwszValue, DWORD cchValue)
{
DWORD dwAttrib = FILE_ATTRIBUTE_SYSTEM;
WCHAR wszFolderPath[MAX_PATH];
/* Hack around not having system attribute on non-Windows file systems */
if (0)
dwAttrib = _ILGetFileAttributes(pidl, NULL, 0);
if (dwAttrib & FILE_ATTRIBUTE_SYSTEM)
{
if (!SHGetPathFromIDListW(pidl, wszFolderPath))
return FALSE;
return SHELL32_GetCustomFolderAttributeFromPath(wszFolderPath, pwszHeading,
pwszAttribute, pwszValue, cchValue);
}
return FALSE;
}
/***************************************************************************
* GetNextElement (internal function)
*
* Gets a part of a string till the first backslash.
*
* PARAMETERS
* pszNext [IN] string to get the element from
* pszOut [IN] pointer to buffer which receives string
* dwOut [IN] length of pszOut
*
* RETURNS
* LPSTR pointer to first, not yet parsed char
*/
LPCWSTR GetNextElementW (LPCWSTR pszNext, LPWSTR pszOut, DWORD dwOut)
{
LPCWSTR pszTail = pszNext;
DWORD dwCopy;
TRACE ("(%s %p 0x%08x)\n", debugstr_w (pszNext), pszOut, dwOut);
*pszOut = 0x0000;
if (!pszNext || !*pszNext)
return NULL;
while (*pszTail && (*pszTail != (WCHAR) '\\'))
pszTail++;
dwCopy = pszTail - pszNext + 1;
lstrcpynW (pszOut, pszNext, (dwOut < dwCopy) ? dwOut : dwCopy);
if (*pszTail)
pszTail++;
else
pszTail = NULL;
TRACE ("--(%s %s 0x%08x %p)\n", debugstr_w (pszNext), debugstr_w (pszOut), dwOut, pszTail);
return pszTail;
}
HRESULT SHELL32_ParseNextElement (IShellFolder2 * psf, HWND hwndOwner, LPBC pbc,
LPITEMIDLIST * pidlInOut, LPOLESTR szNext, DWORD * pEaten, DWORD * pdwAttributes)
{
HRESULT hr = E_INVALIDARG;
LPITEMIDLIST pidlOut = NULL,
pidlTemp = NULL;
IShellFolder *psfChild;
TRACE ("(%p, %p, %p, %s)\n", psf, pbc, pidlInOut ? *pidlInOut : NULL, debugstr_w (szNext));
/* get the shellfolder for the child pidl and let it analyse further */
hr = IShellFolder_BindToObject (psf, *pidlInOut, pbc, &IID_IShellFolder, (LPVOID *) & psfChild);
if (SUCCEEDED(hr)) {
hr = IShellFolder_ParseDisplayName (psfChild, hwndOwner, pbc, szNext, pEaten, &pidlOut, pdwAttributes);
IShellFolder_Release (psfChild);
if (SUCCEEDED(hr)) {
pidlTemp = ILCombine (*pidlInOut, pidlOut);
if (!pidlTemp)
hr = E_OUTOFMEMORY;
}
if (pidlOut)
ILFree (pidlOut);
}
ILFree (*pidlInOut);
*pidlInOut = pidlTemp;
TRACE ("-- pidl=%p ret=0x%08x\n", pidlInOut ? *pidlInOut : NULL, hr);
return hr;
}
/***********************************************************************
* SHELL32_CoCreateInitSF
*
* Creates a shell folder and initializes it with a pidl and a root folder
* via IPersistFolder3 or IPersistFolder.
*
* NOTES
* pathRoot can be NULL for Folders being a drive.
* In this case the absolute path is built from pidlChild (eg. C:)
*/
static HRESULT SHELL32_CoCreateInitSF (LPCITEMIDLIST pidlRoot, LPCWSTR pathRoot,
LPCITEMIDLIST pidlChild, REFCLSID clsid, LPVOID * ppvOut)
{
HRESULT hr;
TRACE ("%p %s %p\n", pidlRoot, debugstr_w(pathRoot), pidlChild);
hr = SHCoCreateInstance(NULL, clsid, NULL, &IID_IShellFolder, ppvOut);
if (SUCCEEDED (hr))
{
LPITEMIDLIST pidlAbsolute = ILCombine (pidlRoot, pidlChild);
IPersistFolder *pPF;
IPersistFolder3 *ppf;
if (_ILIsFolder(pidlChild) &&
SUCCEEDED (IUnknown_QueryInterface ((IUnknown *) * ppvOut, &IID_IPersistFolder3, (LPVOID *) & ppf)))
{
PERSIST_FOLDER_TARGET_INFO ppfti;
ZeroMemory (&ppfti, sizeof (ppfti));
/* fill the PERSIST_FOLDER_TARGET_INFO */
ppfti.dwAttributes = -1;
ppfti.csidl = -1;
/* build path */
if (pathRoot) {
lstrcpynW (ppfti.szTargetParsingName, pathRoot, MAX_PATH - 1);
PathAddBackslashW(ppfti.szTargetParsingName); /* FIXME: why have drives a backslash here ? */
}
if (pidlChild) {
int len = lstrlenW(ppfti.szTargetParsingName);
if (!_ILSimpleGetTextW(pidlChild, ppfti.szTargetParsingName + len, MAX_PATH - len))
hr = E_INVALIDARG;
}
IPersistFolder3_InitializeEx (ppf, NULL, pidlAbsolute, &ppfti);
IPersistFolder3_Release (ppf);
}
else if (SUCCEEDED ((hr = IUnknown_QueryInterface ((IUnknown *) * ppvOut, &IID_IPersistFolder, (LPVOID *) & pPF)))) {
IPersistFolder_Initialize (pPF, pidlAbsolute);
IPersistFolder_Release (pPF);
}
ILFree (pidlAbsolute);
}
TRACE ("-- (%p) ret=0x%08x\n", *ppvOut, hr);
return hr;
}
/***********************************************************************
* SHELL32_BindToChild [Internal]
*
* Common code for IShellFolder_BindToObject.
*
* PARAMS
* pidlRoot [I] The parent shell folder's absolute pidl.
* pathRoot [I] Absolute dos path of the parent shell folder.
* pidlComplete [I] PIDL of the child. Relative to pidlRoot.
* riid [I] GUID of the interface, which ppvOut shall be bound to.
* ppvOut [O] A reference to the child's interface (riid).
*
* NOTES
* pidlComplete has to contain at least one non empty SHITEMID.
* This function makes special assumptions on the shell namespace, which
* means you probably can't use it for your IShellFolder implementation.
*/
HRESULT SHELL32_BindToChild (LPCITEMIDLIST pidlRoot,
LPCWSTR pathRoot, LPCITEMIDLIST pidlComplete, REFIID riid, LPVOID * ppvOut)
{
GUID const *clsid;
IShellFolder *pSF;
HRESULT hr;
LPITEMIDLIST pidlChild;
if (!pidlRoot || !ppvOut || !pidlComplete || !pidlComplete->mkid.cb)
return E_INVALIDARG;
*ppvOut = NULL;
pidlChild = ILCloneFirst (pidlComplete);
if ((clsid = _ILGetGUIDPointer (pidlChild))) {
/* virtual folder */
hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild, clsid, (LPVOID *)&pSF);
} else {
/* file system folder */
CLSID clsidFolder = CLSID_ShellFSFolder;
static const WCHAR wszCLSID[] = {'C','L','S','I','D',0};
WCHAR wszCLSIDValue[CHARS_IN_GUID], wszFolderPath[MAX_PATH], *pwszPathTail = wszFolderPath;
/* see if folder CLSID should be overridden by desktop.ini file */
if (pathRoot) {
lstrcpynW(wszFolderPath, pathRoot, MAX_PATH);
pwszPathTail = PathAddBackslashW(wszFolderPath);
}
_ILSimpleGetTextW(pidlChild,pwszPathTail,MAX_PATH - (int)(pwszPathTail - wszFolderPath));
if (SHELL32_GetCustomFolderAttributeFromPath (wszFolderPath,
wszDotShellClassInfo, wszCLSID, wszCLSIDValue, CHARS_IN_GUID))
CLSIDFromString (wszCLSIDValue, &clsidFolder);
hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild,
&clsidFolder, (LPVOID *)&pSF);
}
ILFree (pidlChild);
if (SUCCEEDED (hr)) {
if (_ILIsPidlSimple (pidlComplete)) {
/* no sub folders */
hr = IShellFolder_QueryInterface (pSF, riid, ppvOut);
} else {
/* go deeper */
hr = IShellFolder_BindToObject (pSF, ILGetNext (pidlComplete), NULL, riid, ppvOut);
}
IShellFolder_Release (pSF);
}
TRACE ("-- returning (%p) %08x\n", *ppvOut, hr);
return hr;
}
/***********************************************************************
* SHELL32_GetDisplayNameOfChild
*
* Retrieves the display name of a child object of a shellfolder.
*
* For a pidl eg. [subpidl1][subpidl2][subpidl3]:
* - it binds to the child shellfolder [subpidl1]
* - asks it for the displayname of [subpidl2][subpidl3]
*
* Is possible the pidl is a simple pidl. In this case it asks the
* subfolder for the displayname of an empty pidl. The subfolder
* returns the own displayname eg. "::{guid}". This is used for
* virtual folders with the registry key WantsFORPARSING set.
*/
HRESULT SHELL32_GetDisplayNameOfChild (IShellFolder2 * psf,
LPCITEMIDLIST pidl, DWORD dwFlags, LPWSTR szOut, DWORD dwOutLen)
{
LPITEMIDLIST pidlFirst;
HRESULT hr = E_INVALIDARG;
TRACE ("(%p)->(pidl=%p 0x%08x %p 0x%08x)\n", psf, pidl, dwFlags, szOut, dwOutLen);
pdump (pidl);
pidlFirst = ILCloneFirst (pidl);
if (pidlFirst) {
IShellFolder2 *psfChild;
hr = IShellFolder_BindToObject (psf, pidlFirst, NULL, &IID_IShellFolder, (LPVOID *) & psfChild);
if (SUCCEEDED (hr)) {
STRRET strTemp;
LPITEMIDLIST pidlNext = ILGetNext (pidl);
hr = IShellFolder_GetDisplayNameOf (psfChild, pidlNext, dwFlags, &strTemp);
if (SUCCEEDED (hr)) {
if(!StrRetToStrNW (szOut, dwOutLen, &strTemp, pidlNext))
hr = E_FAIL;
}
IShellFolder_Release (psfChild);
}
ILFree (pidlFirst);
} else
hr = E_OUTOFMEMORY;
TRACE ("-- ret=0x%08x %s\n", hr, debugstr_w(szOut));
return hr;
}
/***********************************************************************
* SHELL32_GetItemAttributes
*
* NOTES
* Observed values:
* folder: 0xE0000177 FILESYSTEM | HASSUBFOLDER | FOLDER
* file: 0x40000177 FILESYSTEM
* drive: 0xf0000144 FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR
* mycomputer: 0xb0000154 HASSUBFOLDER | FOLDER | FILESYSANCESTOR
* (seems to be default for shell extensions if no registry entry exists)
*
* win2k:
* folder: 0xF0400177 FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER
* file: 0x40400177 FILESYSTEM | CANMONIKER
* drive 0xF0400154 FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER | CANRENAME (LABEL)
*
* According to the MSDN documentation this function should not set flags. It claims only to reset flags when necessary.
* However it turns out the native shell32.dll _sets_ flags in several cases - so do we.
*/
HRESULT SHELL32_GetItemAttributes (IShellFolder * psf, LPCITEMIDLIST pidl, LPDWORD pdwAttributes)
{
DWORD dwAttributes;
BOOL has_guid;
static const DWORD dwSupportedAttr=
SFGAO_CANCOPY | /*0x00000001 */
SFGAO_CANMOVE | /*0x00000002 */
SFGAO_CANLINK | /*0x00000004 */
SFGAO_CANRENAME | /*0x00000010 */
SFGAO_CANDELETE | /*0x00000020 */
SFGAO_HASPROPSHEET | /*0x00000040 */
SFGAO_DROPTARGET | /*0x00000100 */
SFGAO_LINK | /*0x00010000 */
SFGAO_READONLY | /*0x00040000 */
SFGAO_HIDDEN | /*0x00080000 */
SFGAO_FILESYSANCESTOR | /*0x10000000 */
SFGAO_FOLDER | /*0x20000000 */
SFGAO_FILESYSTEM | /*0x40000000 */
SFGAO_HASSUBFOLDER; /*0x80000000 */
TRACE ("0x%08x\n", *pdwAttributes);
if (*pdwAttributes & ~dwSupportedAttr)
{
WARN ("attributes 0x%08x not implemented\n", (*pdwAttributes & ~dwSupportedAttr));
*pdwAttributes &= dwSupportedAttr;
}
has_guid = _ILGetGUIDPointer(pidl) != NULL;
dwAttributes = *pdwAttributes;
if (_ILIsDrive (pidl)) {
*pdwAttributes &= SFGAO_HASSUBFOLDER|SFGAO_FILESYSTEM|SFGAO_FOLDER|SFGAO_FILESYSANCESTOR|
SFGAO_DROPTARGET|SFGAO_HASPROPSHEET|SFGAO_CANLINK;
} else if (has_guid && HCR_GetFolderAttributes(pidl, &dwAttributes)) {
*pdwAttributes = dwAttributes;
} else if (_ILGetDataPointer (pidl)) {
dwAttributes = _ILGetFileAttributes (pidl, NULL, 0);
if (!dwAttributes && has_guid) {
WCHAR path[MAX_PATH];
STRRET strret;
/* File attributes are not present in the internal PIDL structure, so get them from the file system. */
HRESULT hr = IShellFolder_GetDisplayNameOf(psf, pidl, SHGDN_FORPARSING, &strret);
if (SUCCEEDED(hr)) {
hr = StrRetToBufW(&strret, pidl, path, MAX_PATH);
/* call GetFileAttributes() only for file system paths, not for parsing names like "::{...}" */
if (SUCCEEDED(hr) && path[0]!=':')
dwAttributes = GetFileAttributesW(path);
}
}
/* Set common attributes */
*pdwAttributes |= SFGAO_FILESYSTEM | SFGAO_DROPTARGET | SFGAO_HASPROPSHEET | SFGAO_CANDELETE |
SFGAO_CANRENAME | SFGAO_CANLINK | SFGAO_CANMOVE | SFGAO_CANCOPY;
if (dwAttributes & FILE_ATTRIBUTE_DIRECTORY)
*pdwAttributes |= (SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
else
*pdwAttributes &= ~(SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
if (dwAttributes & FILE_ATTRIBUTE_HIDDEN)
*pdwAttributes |= SFGAO_HIDDEN;
else
*pdwAttributes &= ~SFGAO_HIDDEN;
if (dwAttributes & FILE_ATTRIBUTE_READONLY)
*pdwAttributes |= SFGAO_READONLY;
else
*pdwAttributes &= ~SFGAO_READONLY;
if (SFGAO_LINK & *pdwAttributes) {
char ext[MAX_PATH];
if (!_ILGetExtension(pidl, ext, MAX_PATH) || lstrcmpiA(ext, "lnk"))
*pdwAttributes &= ~SFGAO_LINK;
}
} else {
*pdwAttributes &= SFGAO_HASSUBFOLDER|SFGAO_FOLDER|SFGAO_FILESYSANCESTOR|SFGAO_DROPTARGET|SFGAO_HASPROPSHEET|SFGAO_CANRENAME|SFGAO_CANLINK;
}
TRACE ("-- 0x%08x\n", *pdwAttributes);
return S_OK;
}
/***********************************************************************
* SHELL32_CompareIDs
*/
HRESULT SHELL32_CompareIDs (IShellFolder * iface, LPARAM lParam, LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
{
int type1,
type2;
char szTemp1[MAX_PATH];
char szTemp2[MAX_PATH];
HRESULT nReturn;
LPITEMIDLIST firstpidl,
nextpidl1,
nextpidl2;
IShellFolder *psf;
/* test for empty pidls */
BOOL isEmpty1 = _ILIsDesktop (pidl1);
BOOL isEmpty2 = _ILIsDesktop (pidl2);
if (isEmpty1 && isEmpty2)
return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 0 );
if (isEmpty1)
return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
if (isEmpty2)
return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
/* test for different types. Sort order is the PT_* constant */
type1 = _ILGetDataPointer (pidl1)->type;
type2 = _ILGetDataPointer (pidl2)->type;
if (type1 < type2)
return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
else if (type1 > type2)
return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
/* test for name of pidl */
_ILSimpleGetText (pidl1, szTemp1, MAX_PATH);
_ILSimpleGetText (pidl2, szTemp2, MAX_PATH);
nReturn = lstrcmpiA (szTemp1, szTemp2);
if (nReturn < 0)
return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
else if (nReturn > 0)
return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
/* test of complex pidls */
firstpidl = ILCloneFirst (pidl1);
nextpidl1 = ILGetNext (pidl1);
nextpidl2 = ILGetNext (pidl2);
/* optimizing: test special cases and bind not deeper */
/* the deeper shellfolder would do the same */
isEmpty1 = _ILIsDesktop (nextpidl1);
isEmpty2 = _ILIsDesktop (nextpidl2);
if (isEmpty1 && isEmpty2) {
return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 0 );
} else if (isEmpty1) {
return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
} else if (isEmpty2) {
return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
/* optimizing end */
} else if (SUCCEEDED (IShellFolder_BindToObject (iface, firstpidl, NULL, &IID_IShellFolder, (LPVOID *) & psf))) {
nReturn = IShellFolder_CompareIDs (psf, lParam, nextpidl1, nextpidl2);
IShellFolder_Release (psf);
}
ILFree (firstpidl);
return nReturn;
}
/***********************************************************************
* SHCreateLinks
*
* Undocumented.
*/
HRESULT WINAPI SHCreateLinks( HWND hWnd, LPCSTR lpszDir, LPDATAOBJECT lpDataObject,
UINT uFlags, LPITEMIDLIST *lppidlLinks)
{
FIXME("%p %s %p %08x %p\n",hWnd,lpszDir,lpDataObject,uFlags,lppidlLinks);
return E_NOTIMPL;
}
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