reactos/dll/shellext/fontext/CDataObject.cpp

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/*
* PROJECT: ReactOS Font Shell Extension
* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
* PURPOSE: CFontMenu implementation
* COPYRIGHT: Copyright 2019 Mark Jansen (mark.jansen@reactos.org)
*/
#include "precomp.h"
WINE_DEFAULT_DEBUG_CHANNEL(fontext);
#if 0
static inline void DumpDataObjectFormats(IDataObject* pObject)
{
CComPtr<IEnumFORMATETC> pEnumFmt;
HRESULT hr = pObject->EnumFormatEtc(DATADIR_GET, &pEnumFmt);
if (FAILED_UNEXPECTEDLY(hr))
return;
FORMATETC fmt;
while (S_OK == pEnumFmt->Next(1, &fmt, NULL))
{
char szBuf[512];
GetClipboardFormatNameA(fmt.cfFormat, szBuf, sizeof(szBuf));
ERR("Format: %s\n", szBuf);
ERR("Tymed: %u\n", fmt.tymed);
if (fmt.tymed & TYMED_HGLOBAL)
{
ERR("TYMED_HGLOBAL supported\n");
}
}
}
#endif
HRESULT _CDataObject_CreateInstance(PCIDLIST_ABSOLUTE folder, UINT cidl, PCUITEMID_CHILD_ARRAY apidl,
REFIID riid, LPVOID* ppvOut)
{
HRESULT hr = CIDLData_CreateFromIDArray(folder, cidl, apidl, (IDataObject**)ppvOut);
if (FAILED_UNEXPECTEDLY(hr))
return hr;
// Now that we have an IDataObject with the shell itemid list (CFSTR_SHELLIDLIST, aka HIDA) format
// we will augment this IDataObject with the CF_HDROP format. (Full filepaths)
// This enabled the objects for the 'copy' and drag to copy actions
WCHAR FontsDir[MAX_PATH];
hr = SHGetFolderPathW(NULL, CSIDL_FONTS, NULL, 0, FontsDir);
if (FAILED_UNEXPECTEDLY(hr))
return S_OK;
StringCchCatW(FontsDir, _countof(FontsDir), L"\\");
CComHeapPtr<BYTE> data;
// First we allocate room for the DROPFILES structure
data.AllocateBytes(sizeof(DROPFILES));
UINT offset = sizeof(DROPFILES);
// Then we walk all files
for (UINT n = 0; n < cidl; ++n)
{
const FontPidlEntry* fontEntry = _FontFromIL(apidl[n]);
if (fontEntry)
{
CStringW File = g_FontCache->Filename(fontEntry);
if (!File.IsEmpty())
{
// Ensure this is a full path
if (PathIsRelativeW(File))
{
File = FontsDir + File;
}
// Now append the path (+ nullterminator) to the buffer
UINT len = offset + (File.GetLength() + 1) * sizeof(WCHAR);
data.ReallocateBytes(len);
if (!data)
{
ERR("Unable to allocate memory for the CF_HDROP\n");
return hr;
}
BYTE* dataPtr = data;
StringCbCopyW((STRSAFE_LPWSTR)(dataPtr + offset), len - offset, File);
offset = len;
}
else
{
ERR("No file found for %S\n", fontEntry->Name);
}
}
}
// Append the final nullterminator (double null terminated list)
data.ReallocateBytes(offset + sizeof(UNICODE_NULL));
LPWSTR str = (LPWSTR)((BYTE*)data + offset);
*str = UNICODE_NULL;
offset += sizeof(UNICODE_NULL);
// Fill in the required fields
DROPFILES* pDrop = (DROPFILES*)(BYTE*)data;
pDrop->fWide = 1;
pDrop->pFiles = sizeof(DROPFILES);
// Zero out the rest
pDrop->pt.x = pDrop->pt.y = 0;
pDrop-> fNC = NULL;
// Prepare the format descriptors
STGMEDIUM medium = {0};
medium.tymed = TYMED_HGLOBAL;
// Copy the data to an HGLOBAL
medium.hGlobal = GlobalAlloc(GHND, offset);
if (medium.hGlobal)
{
LPVOID blob = GlobalLock(medium.hGlobal);
if (blob)
{
CopyMemory(blob, (BYTE*)data, offset);
GlobalUnlock(medium.hGlobal);
CComPtr<IDataObject> spDataObject(*(IDataObject**)ppvOut);
if (spDataObject)
{
FORMATETC etc = { CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
hr = spDataObject->SetData(&etc, &medium, TRUE);
}
}
else
{
ERR("Unable to lock the hGlobal?!\n");
}
}
else
{
ERR("Unable to allocate %u bytes for the hGlobal\n", offset);
}
return hr;
}