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reactos/dll/win32/shell32/droptargets/CFSDropTarget.cpp
Giannis Adamopoulos fd209faa66 [SHELL32] CFSDropTarget: style fixes
2018-02-17 22:01:04 +02:00

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/*
* file system folder drop target
*
* Copyright 1997 Marcus Meissner
* Copyright 1998, 1999, 2002 Juergen Schmied
*
* 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 <precomp.h>
WINE_DEFAULT_DEBUG_CHANNEL (shell);
/****************************************************************************
* BuildPathsList
*
* Builds a list of paths like the one used in SHFileOperation from a table of
* PIDLs relative to the given base folder
*/
static WCHAR* BuildPathsList(LPCWSTR wszBasePath, int cidl, LPCITEMIDLIST *pidls)
{
WCHAR *pwszPathsList = (WCHAR *)HeapAlloc(GetProcessHeap(), 0, MAX_PATH * sizeof(WCHAR) * cidl + 1);
WCHAR *pwszListPos = pwszPathsList;
for (int i = 0; i < cidl; i++)
{
FileStructW* pDataW = _ILGetFileStructW(pidls[i]);
if (!pDataW)
{
ERR("Got garbage pidl\n");
continue;
}
PathCombineW(pwszListPos, wszBasePath, pDataW->wszName);
pwszListPos += wcslen(pwszListPos) + 1;
}
*pwszListPos = 0;
return pwszPathsList;
}
/****************************************************************************
* CFSDropTarget::_CopyItems
*
* copies items to this folder
*/
HRESULT CFSDropTarget::_CopyItems(IShellFolder * pSFFrom, UINT cidl,
LPCITEMIDLIST * apidl, BOOL bCopy)
{
LPWSTR pszSrcList;
HRESULT hr;
WCHAR wszTargetPath[MAX_PATH + 1];
wcscpy(wszTargetPath, m_sPathTarget);
//Double NULL terminate.
wszTargetPath[wcslen(wszTargetPath) + 1] = '\0';
TRACE ("(%p)->(%p,%u,%p)\n", this, pSFFrom, cidl, apidl);
STRRET strretFrom;
hr = pSFFrom->GetDisplayNameOf(NULL, SHGDN_FORPARSING, &strretFrom);
if (FAILED_UNEXPECTEDLY(hr))
return hr;
pszSrcList = BuildPathsList(strretFrom.pOleStr, cidl, apidl);
ERR("Source file (just the first) = %s, target path = %s, bCopy: %d\n", debugstr_w(pszSrcList), debugstr_w(m_sPathTarget), bCopy);
CoTaskMemFree(strretFrom.pOleStr);
if (!pszSrcList)
return E_OUTOFMEMORY;
SHFILEOPSTRUCTW op = {0};
op.pFrom = pszSrcList;
op.pTo = wszTargetPath;
op.hwnd = m_hwndSite;
op.wFunc = bCopy ? FO_COPY : FO_MOVE;
op.fFlags = FOF_ALLOWUNDO | FOF_NOCONFIRMMKDIR;
int res = SHFileOperationW(&op);
HeapFree(GetProcessHeap(), 0, pszSrcList);
if (res)
return E_FAIL;
else
return S_OK;
}
CFSDropTarget::CFSDropTarget():
m_cfShellIDList(0),
m_fAcceptFmt(FALSE),
m_sPathTarget(NULL),
m_hwndSite(NULL),
m_grfKeyState(0)
{
}
HRESULT CFSDropTarget::Initialize(LPWSTR PathTarget)
{
if (!PathTarget)
return E_UNEXPECTED;
m_cfShellIDList = RegisterClipboardFormatW(CFSTR_SHELLIDLIST);
if (!m_cfShellIDList)
return E_FAIL;
m_sPathTarget = (WCHAR *)SHAlloc((wcslen(PathTarget) + 1) * sizeof(WCHAR));
if (!m_sPathTarget)
return E_OUTOFMEMORY;
wcscpy(m_sPathTarget, PathTarget);
return S_OK;
}
CFSDropTarget::~CFSDropTarget()
{
SHFree(m_sPathTarget);
}
BOOL
CFSDropTarget::_GetUniqueFileName(LPWSTR pwszBasePath, LPCWSTR pwszExt, LPWSTR pwszTarget, BOOL bShortcut)
{
WCHAR wszLink[40];
if (!bShortcut)
{
if (!LoadStringW(shell32_hInstance, IDS_LNK_FILE, wszLink, _countof(wszLink)))
wszLink[0] = L'\0';
}
if (!bShortcut)
swprintf(pwszTarget, L"%s%s%s", wszLink, pwszBasePath, pwszExt);
else
swprintf(pwszTarget, L"%s%s", pwszBasePath, pwszExt);
for (UINT i = 2; PathFileExistsW(pwszTarget); ++i)
{
if (!bShortcut)
swprintf(pwszTarget, L"%s%s (%u)%s", wszLink, pwszBasePath, i, pwszExt);
else
swprintf(pwszTarget, L"%s (%u)%s", pwszBasePath, i, pwszExt);
}
return TRUE;
}
/****************************************************************************
* IDropTarget implementation
*/
BOOL CFSDropTarget::_QueryDrop(DWORD dwKeyState, LPDWORD pdwEffect)
{
/* TODO Windows does different drop effects if dragging across drives.
i.e., it will copy instead of move if the directories are on different disks. */
DWORD dwEffect = m_dwDefaultEffect;
*pdwEffect = DROPEFFECT_NONE;
if (m_fAcceptFmt) { /* Does our interpretation of the keystate ... */
*pdwEffect = KeyStateToDropEffect (dwKeyState);
if (*pdwEffect == DROPEFFECT_NONE)
*pdwEffect = dwEffect;
/* ... matches the desired effect ? */
if (dwEffect & *pdwEffect) {
return TRUE;
}
}
return FALSE;
}
HRESULT CFSDropTarget::_GetEffectFromMenu(IDataObject *pDataObject, POINTL pt, DWORD *pdwEffect, DWORD dwAvailableEffects)
{
HMENU hmenu = LoadMenuW(shell32_hInstance, MAKEINTRESOURCEW(IDM_DRAGFILE));
if (!hmenu)
return E_OUTOFMEMORY;
HMENU hpopupmenu = GetSubMenu(hmenu, 0);
if ((dwAvailableEffects & DROPEFFECT_COPY) == 0)
DeleteMenu(hpopupmenu, IDM_COPYHERE, MF_BYCOMMAND);
else if ((dwAvailableEffects & DROPEFFECT_MOVE) == 0)
DeleteMenu(hpopupmenu, IDM_MOVEHERE, MF_BYCOMMAND);
else if ((dwAvailableEffects & DROPEFFECT_LINK) == 0)
DeleteMenu(hpopupmenu, IDM_LINKHERE, MF_BYCOMMAND);
if ((*pdwEffect & DROPEFFECT_COPY))
SetMenuDefaultItem(hpopupmenu, IDM_COPYHERE, FALSE);
else if ((*pdwEffect & DROPEFFECT_MOVE))
SetMenuDefaultItem(hpopupmenu, IDM_MOVEHERE, FALSE);
else if ((*pdwEffect & DROPEFFECT_LINK))
SetMenuDefaultItem(hpopupmenu, IDM_LINKHERE, FALSE);
/* FIXME: We need to support shell extensions here */
UINT uCommand = TrackPopupMenu(hpopupmenu,
TPM_LEFTALIGN | TPM_RETURNCMD | TPM_LEFTBUTTON | TPM_RIGHTBUTTON | TPM_NONOTIFY,
pt.x, pt.y, 0, m_hwndSite, NULL);
if (uCommand == 0)
return S_FALSE;
else if (uCommand == IDM_COPYHERE)
*pdwEffect = DROPEFFECT_COPY;
else if (uCommand == IDM_MOVEHERE)
*pdwEffect = DROPEFFECT_MOVE;
else if (uCommand == IDM_LINKHERE)
*pdwEffect = DROPEFFECT_LINK;
return S_OK;
}
HRESULT CFSDropTarget::_RepositionItems(IShellFolderView *psfv, IDataObject *pdtobj, POINTL pt)
{
CComPtr<IFolderView> pfv;
POINT ptDrag;
HRESULT hr = psfv->QueryInterface(IID_PPV_ARG(IFolderView, &pfv));
if (FAILED_UNEXPECTEDLY(hr))
return hr;
hr = psfv->GetDragPoint(&ptDrag);
if (FAILED_UNEXPECTEDLY(hr))
return hr;
PIDLIST_ABSOLUTE pidlFolder;
PUITEMID_CHILD *apidl;
UINT cidl;
hr = SH_GetApidlFromDataObject(pdtobj, &pidlFolder, &apidl, &cidl);
if (FAILED_UNEXPECTEDLY(hr))
return hr;
CComHeapPtr<POINT> apt;
if (!apt.Allocate(cidl))
{
SHFree(pidlFolder);
_ILFreeaPidl(apidl, cidl);
return E_OUTOFMEMORY;
}
for (UINT i = 0; i<cidl; i++)
{
pfv->GetItemPosition(apidl[i], &apt[i]);
apt[i].x += pt.x - ptDrag.x;
apt[i].y += pt.y - ptDrag.y;
}
pfv->SelectAndPositionItems(cidl, apidl, apt, SVSI_SELECT);
SHFree(pidlFolder);
_ILFreeaPidl(apidl, cidl);
return S_OK;
}
HRESULT WINAPI CFSDropTarget::DragEnter(IDataObject *pDataObject,
DWORD dwKeyState, POINTL pt, DWORD *pdwEffect)
{
TRACE("(%p)->(DataObject=%p)\n", this, pDataObject);
FORMATETC fmt;
FORMATETC fmt2;
m_fAcceptFmt = FALSE;
InitFormatEtc (fmt, m_cfShellIDList, TYMED_HGLOBAL);
InitFormatEtc (fmt2, CF_HDROP, TYMED_HGLOBAL);
if (SUCCEEDED(pDataObject->QueryGetData(&fmt)))
m_fAcceptFmt = TRUE;
else if (SUCCEEDED(pDataObject->QueryGetData(&fmt2)))
m_fAcceptFmt = TRUE;
m_grfKeyState = dwKeyState;
m_dwDefaultEffect = DROPEFFECT_MOVE;
STGMEDIUM medium;
if (SUCCEEDED(pDataObject->GetData(&fmt2, &medium)))
{
WCHAR wstrFirstFile[MAX_PATH];
if (DragQueryFileW((HDROP)medium.hGlobal, 0, wstrFirstFile, _countof(wstrFirstFile)))
{
/* Check if the drive letter is different */
if (wstrFirstFile[0] != m_sPathTarget[0])
{
m_dwDefaultEffect = DROPEFFECT_COPY;
}
}
ReleaseStgMedium(&medium);
}
_QueryDrop(dwKeyState, pdwEffect);
return S_OK;
}
HRESULT WINAPI CFSDropTarget::DragOver(DWORD dwKeyState, POINTL pt,
DWORD *pdwEffect)
{
TRACE("(%p)\n", this);
if (!pdwEffect)
return E_INVALIDARG;
m_grfKeyState = dwKeyState;
_QueryDrop(dwKeyState, pdwEffect);
return S_OK;
}
HRESULT WINAPI CFSDropTarget::DragLeave()
{
TRACE("(%p)\n", this);
m_fAcceptFmt = FALSE;
return S_OK;
}
HRESULT WINAPI CFSDropTarget::Drop(IDataObject *pDataObject,
DWORD dwKeyState, POINTL pt, DWORD *pdwEffect)
{
TRACE("(%p) object dropped, effect %u\n", this, *pdwEffect);
if (!pdwEffect)
return E_INVALIDARG;
IUnknown_GetWindow(m_site, &m_hwndSite);
DWORD dwAvailableEffects = *pdwEffect;
_QueryDrop(dwKeyState, pdwEffect);
TRACE("pdwEffect: 0x%x, m_dwDefaultEffect: 0x%x, dwAvailableEffects: 0x%x\n", *pdwEffect, m_dwDefaultEffect, dwAvailableEffects);
if (m_grfKeyState & MK_RBUTTON)
{
HRESULT hr = _GetEffectFromMenu(pDataObject, pt, pdwEffect, dwAvailableEffects);
if (FAILED_UNEXPECTEDLY(hr) || hr == S_FALSE)
return hr;
}
if (*pdwEffect == DROPEFFECT_MOVE && m_site)
{
CComPtr<IShellFolderView> psfv;
HRESULT hr = IUnknown_QueryService(m_site, SID_IFolderView, IID_PPV_ARG(IShellFolderView, &psfv));
if (SUCCEEDED(hr) && psfv->IsDropOnSource(this) == S_OK)
{
_RepositionItems(psfv, pDataObject, pt);
return S_OK;
}
}
BOOL fIsOpAsync = FALSE;
CComPtr<IAsyncOperation> pAsyncOperation;
if (SUCCEEDED(pDataObject->QueryInterface(IID_PPV_ARG(IAsyncOperation, &pAsyncOperation))))
{
if (SUCCEEDED(pAsyncOperation->GetAsyncMode(&fIsOpAsync)) && fIsOpAsync)
{
_DoDropData *data = static_cast<_DoDropData*>(HeapAlloc(GetProcessHeap(), 0, sizeof(_DoDropData)));
data->This = this;
// Need to maintain this class in case the window is closed or the class exists temporarily (when dropping onto a folder).
pDataObject->AddRef();
pAsyncOperation->StartOperation(NULL);
CoMarshalInterThreadInterfaceInStream(IID_IDataObject, pDataObject, &data->pStream);
this->AddRef();
data->dwKeyState = dwKeyState;
data->pt = pt;
// Need to dereference as pdweffect gets freed.
data->pdwEffect = *pdwEffect;
SHCreateThread(CFSDropTarget::_DoDropThreadProc, data, NULL, NULL);
return S_OK;
}
}
return this->_DoDrop(pDataObject, dwKeyState, pt, pdwEffect);
}
HRESULT
WINAPI
CFSDropTarget::SetSite(IUnknown *pUnkSite)
{
m_site = pUnkSite;
return S_OK;
}
HRESULT
WINAPI
CFSDropTarget::GetSite(REFIID riid, void **ppvSite)
{
if (!m_site)
return E_FAIL;
return m_site->QueryInterface(riid, ppvSite);
}
HRESULT CFSDropTarget::_DoDrop(IDataObject *pDataObject,
DWORD dwKeyState, POINTL pt, DWORD *pdwEffect)
{
TRACE("(%p) performing drop, effect %u\n", this, *pdwEffect);
FORMATETC fmt;
FORMATETC fmt2;
STGMEDIUM medium;
InitFormatEtc (fmt, m_cfShellIDList, TYMED_HGLOBAL);
InitFormatEtc (fmt2, CF_HDROP, TYMED_HGLOBAL);
HRESULT hr;
bool bCopy = TRUE;
bool bLinking = FALSE;
/* Figure out what drop operation we're doing */
if (pdwEffect)
{
TRACE("Current drop effect flag %i\n", *pdwEffect);
if ((*pdwEffect & DROPEFFECT_MOVE) == DROPEFFECT_MOVE)
bCopy = FALSE;
if ((*pdwEffect & DROPEFFECT_LINK) == DROPEFFECT_LINK)
bLinking = TRUE;
}
if (SUCCEEDED(pDataObject->QueryGetData(&fmt)))
{
hr = pDataObject->GetData(&fmt, &medium);
TRACE("CFSTR_SHELLIDLIST.\n");
/* lock the handle */
LPIDA lpcida = (LPIDA)GlobalLock(medium.hGlobal);
if (!lpcida)
{
ReleaseStgMedium(&medium);
return E_FAIL;
}
/* convert the data into pidl */
LPITEMIDLIST pidl;
LPITEMIDLIST *apidl = _ILCopyCidaToaPidl(&pidl, lpcida);
if (!apidl)
{
ReleaseStgMedium(&medium);
return E_FAIL;
}
CComPtr<IShellFolder> psfDesktop;
CComPtr<IShellFolder> psfFrom = NULL;
/* Grab the desktop shell folder */
hr = SHGetDesktopFolder(&psfDesktop);
if (FAILED(hr))
{
ERR("SHGetDesktopFolder failed\n");
SHFree(pidl);
_ILFreeaPidl(apidl, lpcida->cidl);
ReleaseStgMedium(&medium);
return E_FAIL;
}
/* Find source folder, this is where the clipboard data was copied from */
if (_ILIsDesktop(pidl))
{
/* use desktop shell folder */
psfFrom = psfDesktop;
}
else
{
hr = psfDesktop->BindToObject(pidl, NULL, IID_PPV_ARG(IShellFolder, &psfFrom));
if (FAILED(hr))
{
ERR("no IShellFolder\n");
SHFree(pidl);
_ILFreeaPidl(apidl, lpcida->cidl);
ReleaseStgMedium(&medium);
return E_FAIL;
}
}
if (bLinking)
{
WCHAR wszTargetPath[MAX_PATH];
WCHAR wszPath[MAX_PATH];
WCHAR wszTarget[MAX_PATH];
wcscpy(wszTargetPath, m_sPathTarget);
TRACE("target path = %s", debugstr_w(wszTargetPath));
/* We need to create a link for each pidl in the copied items, so step through the pidls from the clipboard */
for (UINT i = 0; i < lpcida->cidl; i++)
{
//Find out which file we're copying
STRRET strFile;
hr = psfFrom->GetDisplayNameOf(apidl[i], SHGDN_FORPARSING, &strFile);
if (FAILED(hr))
{
ERR("Error source obtaining path");
break;
}
hr = StrRetToBufW(&strFile, apidl[i], wszPath, _countof(wszPath));
if (FAILED(hr))
{
ERR("Error putting source path into buffer");
break;
}
TRACE("source path = %s", debugstr_w(wszPath));
// Creating a buffer to hold the combined path
WCHAR buffer_1[MAX_PATH] = L"";
WCHAR *lpStr1;
lpStr1 = buffer_1;
LPWSTR pwszFileName = PathFindFileNameW(wszPath);
LPWSTR pwszExt = PathFindExtensionW(wszPath);
LPWSTR placementPath = PathCombineW(lpStr1, m_sPathTarget, pwszFileName);
CComPtr<IPersistFile> ppf;
//Check to see if it's already a link.
if (!wcsicmp(pwszExt, L".lnk"))
{
//It's a link so, we create a new one which copies the old.
if(!_GetUniqueFileName(placementPath, pwszExt, wszTarget, TRUE))
{
ERR("Error getting unique file name");
hr = E_FAIL;
break;
}
hr = IShellLink_ConstructFromPath(wszPath, IID_PPV_ARG(IPersistFile, &ppf));
if (FAILED(hr)) {
ERR("Error constructing link from file");
break;
}
hr = ppf->Save(wszTarget, FALSE);
if (FAILED(hr))
break;
SHChangeNotify(SHCNE_CREATE, SHCNF_PATHW, wszTarget, NULL);
}
else
{
//It's not a link, so build a new link using the creator class and fill it in.
//Create a file name for the link
if (!_GetUniqueFileName(placementPath, L".lnk", wszTarget, TRUE))
{
ERR("Error creating unique file name");
hr = E_FAIL;
break;
}
CComPtr<IShellLinkW> pLink;
hr = CShellLink::_CreatorClass::CreateInstance(NULL, IID_PPV_ARG(IShellLinkW, &pLink));
if (FAILED(hr)) {
ERR("Error instantiating IShellLinkW");
break;
}
WCHAR szDirPath[MAX_PATH], *pwszFile;
GetFullPathName(wszPath, MAX_PATH, szDirPath, &pwszFile);
if (pwszFile) pwszFile[0] = 0;
hr = pLink->SetPath(wszPath);
if(FAILED(hr))
break;
hr = pLink->SetWorkingDirectory(szDirPath);
if(FAILED(hr))
break;
hr = pLink->QueryInterface(IID_PPV_ARG(IPersistFile, &ppf));
if(FAILED(hr))
break;
hr = ppf->Save(wszTarget, TRUE);
if (FAILED(hr))
break;
SHChangeNotify(SHCNE_CREATE, SHCNF_PATHW, wszTarget, NULL);
}
}
}
else
{
hr = _CopyItems(psfFrom, lpcida->cidl, (LPCITEMIDLIST*)apidl, bCopy);
}
SHFree(pidl);
_ILFreeaPidl(apidl, lpcida->cidl);
ReleaseStgMedium(&medium);
}
else if (SUCCEEDED(pDataObject->QueryGetData(&fmt2)))
{
FORMATETC fmt2;
InitFormatEtc (fmt2, CF_HDROP, TYMED_HGLOBAL);
if (SUCCEEDED(pDataObject->GetData(&fmt2, &medium)) /* && SUCCEEDED(pDataObject->GetData(&fmt2, &medium))*/)
{
WCHAR wszTargetPath[MAX_PATH + 1];
LPWSTR pszSrcList;
wcscpy(wszTargetPath, m_sPathTarget);
//Double NULL terminate.
wszTargetPath[wcslen(wszTargetPath) + 1] = '\0';
LPDROPFILES lpdf = (LPDROPFILES) GlobalLock(medium.hGlobal);
if (!lpdf)
{
ERR("Error locking global\n");
return E_FAIL;
}
pszSrcList = (LPWSTR) (((byte*) lpdf) + lpdf->pFiles);
ERR("Source file (just the first) = %s, target path = %s, bCopy: %d\n", debugstr_w(pszSrcList), debugstr_w(wszTargetPath), bCopy);
SHFILEOPSTRUCTW op;
ZeroMemory(&op, sizeof(op));
op.pFrom = pszSrcList;
op.pTo = wszTargetPath;
op.hwnd = m_hwndSite;
op.wFunc = bCopy ? FO_COPY : FO_MOVE;
op.fFlags = FOF_ALLOWUNDO | FOF_NOCONFIRMMKDIR;
hr = SHFileOperationW(&op);
return hr;
}
ERR("Error calling GetData\n");
hr = E_FAIL;
}
else
{
ERR("No viable drop format.\n");
hr = E_FAIL;
}
return hr;
}
DWORD WINAPI CFSDropTarget::_DoDropThreadProc(LPVOID lpParameter)
{
CoInitialize(NULL);
_DoDropData *data = static_cast<_DoDropData*>(lpParameter);
CComPtr<IDataObject> pDataObject;
HRESULT hr = CoGetInterfaceAndReleaseStream (data->pStream, IID_PPV_ARG(IDataObject, &pDataObject));
if (SUCCEEDED(hr))
{
CComPtr<IAsyncOperation> pAsyncOperation;
hr = data->This->_DoDrop(pDataObject, data->dwKeyState, data->pt, &data->pdwEffect);
if (SUCCEEDED(pDataObject->QueryInterface(IID_PPV_ARG(IAsyncOperation, &pAsyncOperation))))
{
pAsyncOperation->EndOperation(hr, NULL, data->pdwEffect);
}
}
//Release the CFSFolder and data object holds in the copying thread.
data->This->Release();
//Release the parameter from the heap.
HeapFree(GetProcessHeap(), 0, data);
CoUninitialize();
return 0;
}
HRESULT CFSDropTarget_CreateInstance(LPWSTR sPathTarget, REFIID riid, LPVOID * ppvOut)
{
return ShellObjectCreatorInit<CFSDropTarget>(sPathTarget, riid, ppvOut);
}
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