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wxWidgets/src/msw/ole/dataobj.cpp

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///////////////////////////////////////////////////////////////////////////////
// Name: src/msw/ole/dataobj.cpp
// Purpose: implementation of wx[I]DataObject class
// Author: Vadim Zeitlin
// Modified by:
// Created: 10.05.98
// RCS-ID: $Id$
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#if defined(__BORLANDC__)
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/utils.h"
#include "wx/wxcrtvararg.h"
#endif
#include "wx/dataobj.h"
#if wxUSE_OLE && defined(__WIN32__) && !defined(__GNUWIN32_OLD__)
#include "wx/msw/private.h" // includes <windows.h>
#ifdef __WXWINCE__
#include <winreg.h>
#endif
// for some compilers, the entire ole2.h must be included, not only oleauto.h
#if wxUSE_NORLANDER_HEADERS || defined(__WATCOMC__) || defined(__WXWINCE__)
#include <ole2.h>
#endif
#include <oleauto.h>
#include <shlobj.h>
#include "wx/msw/ole/oleutils.h"
#include "wx/msw/dib.h"
#ifndef CFSTR_SHELLURL
#define CFSTR_SHELLURL wxT("UniformResourceLocator")
#endif
// ----------------------------------------------------------------------------
// functions
// ----------------------------------------------------------------------------
#if wxDEBUG_LEVEL
static const wxChar *GetTymedName(DWORD tymed);
#else // !wxDEBUG_LEVEL
#define GetTymedName(tymed) wxEmptyString
#endif // wxDEBUG_LEVEL/!wxDEBUG_LEVEL
wxDataFormat HtmlFormatFixup(wxDataFormat format)
{
// Since the HTML format is dynamically registered, the wxDF_HTML
// format does not match the native constant in the way other formats do,
// so for the format checks below to work, we must change the native
// id to the wxDF_HTML constant.
wxChar s_szBuf[256];
if (::GetClipboardFormatName(format, s_szBuf, WXSIZEOF(s_szBuf)))
{
if (s_szBuf == wxString("HTML Format"))
format = wxDF_HTML;
}
return format;
}
// ----------------------------------------------------------------------------
// wxIEnumFORMATETC interface implementation
// ----------------------------------------------------------------------------
class wxIEnumFORMATETC : public IEnumFORMATETC
{
public:
wxIEnumFORMATETC(const wxDataFormat* formats, ULONG nCount);
virtual ~wxIEnumFORMATETC() { delete [] m_formats; }
// IEnumFORMATETC
STDMETHODIMP Next(ULONG celt, FORMATETC *rgelt, ULONG *pceltFetched);
STDMETHODIMP Skip(ULONG celt);
STDMETHODIMP Reset();
STDMETHODIMP Clone(IEnumFORMATETC **ppenum);
DECLARE_IUNKNOWN_METHODS;
private:
CLIPFORMAT *m_formats; // formats we can provide data in
ULONG m_nCount, // number of formats we support
m_nCurrent; // current enum position
wxDECLARE_NO_COPY_CLASS(wxIEnumFORMATETC);
};
// ----------------------------------------------------------------------------
// wxIDataObject implementation of IDataObject interface
// ----------------------------------------------------------------------------
class wxIDataObject : public IDataObject
{
public:
wxIDataObject(wxDataObject *pDataObject);
virtual ~wxIDataObject();
// normally, wxDataObject controls our lifetime (i.e. we're deleted when it
// is), but in some cases, the situation is reversed, that is we delete it
// when this object is deleted - setting this flag enables such logic
void SetDeleteFlag() { m_mustDelete = true; }
// IDataObject
STDMETHODIMP GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium);
STDMETHODIMP GetDataHere(FORMATETC *pformatetc, STGMEDIUM *pmedium);
STDMETHODIMP QueryGetData(FORMATETC *pformatetc);
STDMETHODIMP GetCanonicalFormatEtc(FORMATETC *In, FORMATETC *pOut);
STDMETHODIMP SetData(FORMATETC *pfetc, STGMEDIUM *pmedium, BOOL fRelease);
STDMETHODIMP EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC **ppenumFEtc);
STDMETHODIMP DAdvise(FORMATETC *pfetc, DWORD ad, IAdviseSink *p, DWORD *pdw);
STDMETHODIMP DUnadvise(DWORD dwConnection);
STDMETHODIMP EnumDAdvise(IEnumSTATDATA **ppenumAdvise);
DECLARE_IUNKNOWN_METHODS;
private:
wxDataObject *m_pDataObject; // pointer to C++ class we belong to
bool m_mustDelete;
wxDECLARE_NO_COPY_CLASS(wxIDataObject);
};
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// wxDataFormat
// ----------------------------------------------------------------------------
void wxDataFormat::SetId(const wxString& format)
{
m_format = (wxDataFormat::NativeFormat)::RegisterClipboardFormat(format.wx_str());
if ( !m_format )
{
wxLogError(_("Couldn't register clipboard format '%s'."), format);
}
}
wxString wxDataFormat::GetId() const
{
static const int max = 256;
wxString s;
wxCHECK_MSG( !IsStandard(), s,
wxT("name of predefined format cannot be retrieved") );
int len = ::GetClipboardFormatName(m_format, wxStringBuffer(s, max), max);
if ( !len )
{
wxLogError(_("The clipboard format '%d' doesn't exist."), m_format);
return wxEmptyString;
}
return s;
}
// ----------------------------------------------------------------------------
// wxIEnumFORMATETC
// ----------------------------------------------------------------------------
BEGIN_IID_TABLE(wxIEnumFORMATETC)
ADD_IID(Unknown)
ADD_IID(EnumFORMATETC)
END_IID_TABLE;
IMPLEMENT_IUNKNOWN_METHODS(wxIEnumFORMATETC)
wxIEnumFORMATETC::wxIEnumFORMATETC(const wxDataFormat *formats, ULONG nCount)
{
m_nCurrent = 0;
m_nCount = nCount;
m_formats = new CLIPFORMAT[nCount];
for ( ULONG n = 0; n < nCount; n++ ) {
if (formats[n].GetFormatId() != wxDF_HTML)
m_formats[n] = formats[n].GetFormatId();
else
m_formats[n] = ::RegisterClipboardFormat(wxT("HTML Format"));
}
}
STDMETHODIMP wxIEnumFORMATETC::Next(ULONG celt,
FORMATETC *rgelt,
ULONG *pceltFetched)
{
wxLogTrace(wxTRACE_OleCalls, wxT("wxIEnumFORMATETC::Next"));
ULONG numFetched = 0;
while (m_nCurrent < m_nCount && numFetched < celt) {
FORMATETC format;
format.cfFormat = m_formats[m_nCurrent++];
format.ptd = NULL;
format.dwAspect = DVASPECT_CONTENT;
format.lindex = -1;
format.tymed = TYMED_HGLOBAL;
*rgelt++ = format;
numFetched++;
}
if (pceltFetched)
*pceltFetched = numFetched;
return numFetched == celt ? S_OK : S_FALSE;
}
STDMETHODIMP wxIEnumFORMATETC::Skip(ULONG celt)
{
wxLogTrace(wxTRACE_OleCalls, wxT("wxIEnumFORMATETC::Skip"));
m_nCurrent += celt;
if ( m_nCurrent < m_nCount )
return S_OK;
// no, can't skip this many elements
m_nCurrent -= celt;
return S_FALSE;
}
STDMETHODIMP wxIEnumFORMATETC::Reset()
{
wxLogTrace(wxTRACE_OleCalls, wxT("wxIEnumFORMATETC::Reset"));
m_nCurrent = 0;
return S_OK;
}
STDMETHODIMP wxIEnumFORMATETC::Clone(IEnumFORMATETC **ppenum)
{
wxLogTrace(wxTRACE_OleCalls, wxT("wxIEnumFORMATETC::Clone"));
// unfortunately, we can't reuse the code in ctor - types are different
wxIEnumFORMATETC *pNew = new wxIEnumFORMATETC(NULL, 0);
pNew->m_nCount = m_nCount;
pNew->m_formats = new CLIPFORMAT[m_nCount];
for ( ULONG n = 0; n < m_nCount; n++ ) {
pNew->m_formats[n] = m_formats[n];
}
pNew->AddRef();
*ppenum = pNew;
return S_OK;
}
// ----------------------------------------------------------------------------
// wxIDataObject
// ----------------------------------------------------------------------------
BEGIN_IID_TABLE(wxIDataObject)
ADD_IID(Unknown)
ADD_IID(DataObject)
END_IID_TABLE;
IMPLEMENT_IUNKNOWN_METHODS(wxIDataObject)
wxIDataObject::wxIDataObject(wxDataObject *pDataObject)
{
m_pDataObject = pDataObject;
m_mustDelete = false;
}
wxIDataObject::~wxIDataObject()
{
if ( m_mustDelete )
{
delete m_pDataObject;
}
}
// get data functions
STDMETHODIMP wxIDataObject::GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium)
{
wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::GetData"));
// is data is in our format?
HRESULT hr = QueryGetData(pformatetcIn);
if ( FAILED(hr) )
return hr;
// for the bitmaps and metafiles we use the handles instead of global memory
// to pass the data
wxDataFormat format = (wxDataFormat::NativeFormat)pformatetcIn->cfFormat;
format = HtmlFormatFixup(format);
switch ( format )
{
case wxDF_BITMAP:
pmedium->tymed = TYMED_GDI;
break;
case wxDF_ENHMETAFILE:
pmedium->tymed = TYMED_ENHMF;
break;
#ifndef __WXWINCE__
case wxDF_METAFILE:
pmedium->hGlobal = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE,
sizeof(METAFILEPICT));
if ( !pmedium->hGlobal ) {
wxLogLastError(wxT("GlobalAlloc"));
return E_OUTOFMEMORY;
}
pmedium->tymed = TYMED_MFPICT;
break;
#endif
default:
// alloc memory
size_t size = m_pDataObject->GetDataSize(format);
if ( !size ) {
// it probably means that the method is just not implemented
wxLogDebug(wxT("Invalid data size - can't be 0"));
return DV_E_FORMATETC;
}
// we may need extra space for the buffer size
size += m_pDataObject->GetBufferOffset( format );
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE, size);
if ( hGlobal == NULL ) {
wxLogLastError(wxT("GlobalAlloc"));
return E_OUTOFMEMORY;
}
// copy data
pmedium->tymed = TYMED_HGLOBAL;
pmedium->hGlobal = hGlobal;
}
pmedium->pUnkForRelease = NULL;
// do copy the data
hr = GetDataHere(pformatetcIn, pmedium);
if ( FAILED(hr) ) {
// free resources we allocated
if ( pmedium->tymed & (TYMED_HGLOBAL | TYMED_MFPICT) ) {
GlobalFree(pmedium->hGlobal);
}
return hr;
}
return S_OK;
}
STDMETHODIMP wxIDataObject::GetDataHere(FORMATETC *pformatetc,
STGMEDIUM *pmedium)
{
wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::GetDataHere"));
// put data in caller provided medium
switch ( pmedium->tymed )
{
case TYMED_GDI:
if ( !m_pDataObject->GetDataHere(wxDF_BITMAP, &pmedium->hBitmap) )
return E_UNEXPECTED;
break;
case TYMED_ENHMF:
if ( !m_pDataObject->GetDataHere(wxDF_ENHMETAFILE,
&pmedium->hEnhMetaFile) )
return E_UNEXPECTED;
break;
case TYMED_MFPICT:
// fall through - we pass METAFILEPICT through HGLOBAL
case TYMED_HGLOBAL:
{
// copy data
HGLOBAL hGlobal = pmedium->hGlobal;
void *pBuf = GlobalLock(hGlobal);
if ( pBuf == NULL ) {
wxLogLastError(wxT("GlobalLock"));
return E_OUTOFMEMORY;
}
wxDataFormat format = pformatetc->cfFormat;
// possibly put the size in the beginning of the buffer
pBuf = m_pDataObject->SetSizeInBuffer
(
pBuf,
::GlobalSize(hGlobal),
format
);
if ( !m_pDataObject->GetDataHere(format, pBuf) )
return E_UNEXPECTED;
GlobalUnlock(hGlobal);
}
break;
default:
return DV_E_TYMED;
}
return S_OK;
}
// set data functions
STDMETHODIMP wxIDataObject::SetData(FORMATETC *pformatetc,
STGMEDIUM *pmedium,
BOOL fRelease)
{
wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::SetData"));
switch ( pmedium->tymed )
{
case TYMED_GDI:
m_pDataObject->SetData(wxDF_BITMAP, 0, &pmedium->hBitmap);
break;
case TYMED_ENHMF:
m_pDataObject->SetData(wxDF_ENHMETAFILE, 0, &pmedium->hEnhMetaFile);
break;
case TYMED_MFPICT:
// fall through - we pass METAFILEPICT through HGLOBAL
case TYMED_HGLOBAL:
{
wxDataFormat format = pformatetc->cfFormat;
format = HtmlFormatFixup(format);
// this is quite weird, but for file drag and drop, explorer
// calls our SetData() with the formats we do *not* support!
//
// as we can't fix this bug in explorer (it's a bug because it
// should only use formats returned by EnumFormatEtc), do the
// check here
if ( !m_pDataObject->IsSupported(format, wxDataObject::Set) ) {
// go away!
return DV_E_FORMATETC;
}
// copy data
const void *pBuf = GlobalLock(pmedium->hGlobal);
if ( pBuf == NULL ) {
wxLogLastError(wxT("GlobalLock"));
return E_OUTOFMEMORY;
}
// we've got a problem with SetData() here because the base
// class version requires the size parameter which we don't
// have anywhere in OLE data transfer - so we need to
// synthetise it for known formats and we suppose that all data
// in custom formats starts with a DWORD containing the size
size_t size;
switch ( format )
{
case wxDF_HTML:
case CF_TEXT:
case CF_OEMTEXT:
size = strlen((const char *)pBuf);
break;
#if !(defined(__BORLANDC__) && (__BORLANDC__ < 0x500))
case CF_UNICODETEXT:
#if ( defined(__BORLANDC__) && (__BORLANDC__ > 0x530) )
size = std::wcslen((const wchar_t *)pBuf) * sizeof(wchar_t);
#else
size = wxWcslen((const wchar_t *)pBuf) * sizeof(wchar_t);
#endif
break;
#endif
case CF_BITMAP:
#ifndef __WXWINCE__
case CF_HDROP:
// these formats don't use size at all, anyhow (but
// pass data by handle, which is always a single DWORD)
size = 0;
break;
#endif
case CF_DIB:
// the handler will calculate size itself (it's too
// complicated to do it here)
size = 0;
break;
#ifndef __WXWINCE__
case CF_METAFILEPICT:
size = sizeof(METAFILEPICT);
break;
#endif
default:
pBuf = m_pDataObject->
GetSizeFromBuffer(pBuf, &size, format);
size -= m_pDataObject->GetBufferOffset(format);
}
bool ok = m_pDataObject->SetData(format, size, pBuf);
GlobalUnlock(pmedium->hGlobal);
if ( !ok ) {
return E_UNEXPECTED;
}
}
break;
default:
return DV_E_TYMED;
}
if ( fRelease ) {
// we own the medium, so we must release it - but do *not* free any
// data we pass by handle because we have copied it elsewhere
switch ( pmedium->tymed )
{
case TYMED_GDI:
pmedium->hBitmap = 0;
break;
case TYMED_MFPICT:
pmedium->hMetaFilePict = 0;
break;
case TYMED_ENHMF:
pmedium->hEnhMetaFile = 0;
break;
}
ReleaseStgMedium(pmedium);
}
return S_OK;
}
// information functions
STDMETHODIMP wxIDataObject::QueryGetData(FORMATETC *pformatetc)
{
// do we accept data in this format?
if ( pformatetc == NULL ) {
wxLogTrace(wxTRACE_OleCalls,
wxT("wxIDataObject::QueryGetData: invalid ptr."));
return E_INVALIDARG;
}
// the only one allowed by current COM implementation
if ( pformatetc->lindex != -1 ) {
wxLogTrace(wxTRACE_OleCalls,
wxT("wxIDataObject::QueryGetData: bad lindex %ld"),
pformatetc->lindex);
return DV_E_LINDEX;
}
// we don't support anything other (THUMBNAIL, ICON, DOCPRINT...)
if ( pformatetc->dwAspect != DVASPECT_CONTENT ) {
wxLogTrace(wxTRACE_OleCalls,
wxT("wxIDataObject::QueryGetData: bad dwAspect %ld"),
pformatetc->dwAspect);
return DV_E_DVASPECT;
}
// and now check the type of data requested
wxDataFormat format = pformatetc->cfFormat;
format = HtmlFormatFixup(format);
if ( m_pDataObject->IsSupportedFormat(format) ) {
wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::QueryGetData: %s ok"),
wxGetFormatName(format));
}
else {
wxLogTrace(wxTRACE_OleCalls,
wxT("wxIDataObject::QueryGetData: %s unsupported"),
wxGetFormatName(format));
return DV_E_FORMATETC;
}
// we only transfer data by global memory, except for some particular cases
DWORD tymed = pformatetc->tymed;
if ( (format == wxDF_BITMAP && !(tymed & TYMED_GDI)) &&
!(tymed & TYMED_HGLOBAL) ) {
// it's not what we're waiting for
wxLogTrace(wxTRACE_OleCalls,
wxT("wxIDataObject::QueryGetData: %s != %s"),
GetTymedName(tymed),
GetTymedName(format == wxDF_BITMAP ? TYMED_GDI
: TYMED_HGLOBAL));
return DV_E_TYMED;
}
return S_OK;
}
STDMETHODIMP wxIDataObject::GetCanonicalFormatEtc(FORMATETC *WXUNUSED(pFormatetcIn),
FORMATETC *pFormatetcOut)
{
wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::GetCanonicalFormatEtc"));
// TODO we might want something better than this trivial implementation here
if ( pFormatetcOut != NULL )
pFormatetcOut->ptd = NULL;
return DATA_S_SAMEFORMATETC;
}
STDMETHODIMP wxIDataObject::EnumFormatEtc(DWORD dwDir,
IEnumFORMATETC **ppenumFormatEtc)
{
wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::EnumFormatEtc"));
wxDataObject::Direction dir = dwDir == DATADIR_GET ? wxDataObject::Get
: wxDataObject::Set;
ULONG nFormatCount = wx_truncate_cast(ULONG, m_pDataObject->GetFormatCount(dir));
wxDataFormat format;
wxDataFormat *formats;
formats = nFormatCount == 1 ? &format : new wxDataFormat[nFormatCount];
m_pDataObject->GetAllFormats(formats, dir);
wxIEnumFORMATETC *pEnum = new wxIEnumFORMATETC(formats, nFormatCount);
pEnum->AddRef();
*ppenumFormatEtc = pEnum;
if ( formats != &format ) {
delete [] formats;
}
return S_OK;
}
// ----------------------------------------------------------------------------
// advise sink functions (not implemented)
// ----------------------------------------------------------------------------
STDMETHODIMP wxIDataObject::DAdvise(FORMATETC *WXUNUSED(pformatetc),
DWORD WXUNUSED(advf),
IAdviseSink *WXUNUSED(pAdvSink),
DWORD *WXUNUSED(pdwConnection))
{
return OLE_E_ADVISENOTSUPPORTED;
}
STDMETHODIMP wxIDataObject::DUnadvise(DWORD WXUNUSED(dwConnection))
{
return OLE_E_ADVISENOTSUPPORTED;
}
STDMETHODIMP wxIDataObject::EnumDAdvise(IEnumSTATDATA **WXUNUSED(ppenumAdvise))
{
return OLE_E_ADVISENOTSUPPORTED;
}
// ----------------------------------------------------------------------------
// wxDataObject
// ----------------------------------------------------------------------------
wxDataObject::wxDataObject()
{
m_pIDataObject = new wxIDataObject(this);
m_pIDataObject->AddRef();
}
wxDataObject::~wxDataObject()
{
ReleaseInterface(m_pIDataObject);
}
void wxDataObject::SetAutoDelete()
{
((wxIDataObject *)m_pIDataObject)->SetDeleteFlag();
m_pIDataObject->Release();
// so that the dtor doesnt' crash
m_pIDataObject = NULL;
}
size_t wxDataObject::GetBufferOffset(const wxDataFormat& format )
{
// if we prepend the size of the data to the buffer itself, account for it
return NeedsVerbatimData(format) ? 0 : sizeof(size_t);
}
const void *wxDataObject::GetSizeFromBuffer(const void *buffer,
size_t *size,
const wxDataFormat& WXUNUSED(format))
{
// hack: the third parameter is declared non-const in Wine's headers so
// cast away the const
const size_t realsz = ::HeapSize(::GetProcessHeap(), 0,
const_cast<void*>(buffer));
if ( realsz == (size_t)-1 )
{
// note that HeapSize() does not set last error
wxLogApiError(wxT("HeapSize"), 0);
return NULL;
}
*size = realsz;
return buffer;
}
void* wxDataObject::SetSizeInBuffer( void* buffer, size_t size,
const wxDataFormat& format )
{
size_t* p = (size_t *)buffer;
if ( !NeedsVerbatimData(format) )
{
// prepend the size to the data and skip it
*p++ = size;
}
return p;
}
#if wxDEBUG_LEVEL
const wxChar *wxDataObject::GetFormatName(wxDataFormat format)
{
// case 'xxx' is not a valid value for switch of enum 'wxDataFormat'
#ifdef __VISUALC__
#pragma warning(disable:4063)
#endif // VC++
static wxChar s_szBuf[256];
switch ( format ) {
case CF_TEXT: return wxT("CF_TEXT");
case CF_BITMAP: return wxT("CF_BITMAP");
case CF_SYLK: return wxT("CF_SYLK");
case CF_DIF: return wxT("CF_DIF");
case CF_TIFF: return wxT("CF_TIFF");
case CF_OEMTEXT: return wxT("CF_OEMTEXT");
case CF_DIB: return wxT("CF_DIB");
case CF_PALETTE: return wxT("CF_PALETTE");
case CF_PENDATA: return wxT("CF_PENDATA");
case CF_RIFF: return wxT("CF_RIFF");
case CF_WAVE: return wxT("CF_WAVE");
case CF_UNICODETEXT: return wxT("CF_UNICODETEXT");
#ifndef __WXWINCE__
case CF_METAFILEPICT: return wxT("CF_METAFILEPICT");
case CF_ENHMETAFILE: return wxT("CF_ENHMETAFILE");
case CF_LOCALE: return wxT("CF_LOCALE");
case CF_HDROP: return wxT("CF_HDROP");
#endif
default:
if ( !::GetClipboardFormatName(format, s_szBuf, WXSIZEOF(s_szBuf)) )
{
// it must be a new predefined format we don't know the name of
wxSprintf(s_szBuf, wxT("unknown CF (0x%04x)"), format.GetFormatId());
}
return s_szBuf;
}
#ifdef __VISUALC__
#pragma warning(default:4063)
#endif // VC++
}
#endif // wxDEBUG_LEVEL
// ----------------------------------------------------------------------------
// wxBitmapDataObject supports CF_DIB format
// ----------------------------------------------------------------------------
// TODO: support CF_DIB under Windows CE as well
size_t wxBitmapDataObject::GetDataSize() const
{
#if wxUSE_WXDIB && !defined(__WXWINCE__)
return wxDIB::ConvertFromBitmap(NULL, GetHbitmapOf(GetBitmap()));
#else
return 0;
#endif
}
bool wxBitmapDataObject::GetDataHere(void *buf) const
{
#if wxUSE_WXDIB && !defined(__WXWINCE__)
BITMAPINFO * const pbi = (BITMAPINFO *)buf;
return wxDIB::ConvertFromBitmap(pbi, GetHbitmapOf(GetBitmap())) != 0;
#else
wxUnusedVar(buf);
return false;
#endif
}
bool wxBitmapDataObject::SetData(size_t WXUNUSED(len), const void *buf)
{
#if wxUSE_WXDIB && !defined(__WXWINCE__)
const BITMAPINFO * const pbmi = (const BITMAPINFO *)buf;
HBITMAP hbmp = wxDIB::ConvertToBitmap(pbmi);
wxCHECK_MSG( hbmp, FALSE, wxT("pasting/dropping invalid bitmap") );
const BITMAPINFOHEADER * const pbmih = &pbmi->bmiHeader;
wxBitmap bitmap(pbmih->biWidth, pbmih->biHeight, pbmih->biBitCount);
bitmap.SetHBITMAP((WXHBITMAP)hbmp);
// TODO: create wxPalette if the bitmap has any
SetBitmap(bitmap);
return true;
#else
wxUnusedVar(buf);
return false;
#endif
}
// ----------------------------------------------------------------------------
// wxBitmapDataObject2 supports CF_BITMAP format
// ----------------------------------------------------------------------------
// the bitmaps aren't passed by value as other types of data (i.e. by copying
// the data into a global memory chunk and passing it to the clipboard or
// another application or whatever), but by handle, so these generic functions
// don't make much sense to them.
size_t wxBitmapDataObject2::GetDataSize() const
{
return 0;
}
bool wxBitmapDataObject2::GetDataHere(void *pBuf) const
{
// we put a bitmap handle into pBuf
*(WXHBITMAP *)pBuf = GetBitmap().GetHBITMAP();
return true;
}
bool wxBitmapDataObject2::SetData(size_t WXUNUSED(len), const void *pBuf)
{
HBITMAP hbmp = *(HBITMAP *)pBuf;
BITMAP bmp;
if ( !GetObject(hbmp, sizeof(BITMAP), &bmp) )
{
wxLogLastError(wxT("GetObject(HBITMAP)"));
}
wxBitmap bitmap(bmp.bmWidth, bmp.bmHeight, bmp.bmPlanes);
bitmap.SetHBITMAP((WXHBITMAP)hbmp);
if ( !bitmap.IsOk() ) {
wxFAIL_MSG(wxT("pasting/dropping invalid bitmap"));
return false;
}
SetBitmap(bitmap);
return true;
}
#if 0
size_t wxBitmapDataObject::GetDataSize(const wxDataFormat& format) const
{
if ( format.GetFormatId() == CF_DIB )
{
// create the DIB
ScreenHDC hdc;
// shouldn't be selected into a DC or GetDIBits() would fail
wxASSERT_MSG( !m_bitmap.GetSelectedInto(),
wxT("can't copy bitmap selected into wxMemoryDC") );
// first get the info
BITMAPINFO bi;
if ( !GetDIBits(hdc, (HBITMAP)m_bitmap.GetHBITMAP(), 0, 0,
NULL, &bi, DIB_RGB_COLORS) )
{
wxLogLastError(wxT("GetDIBits(NULL)"));
return 0;
}
return sizeof(BITMAPINFO) + bi.bmiHeader.biSizeImage;
}
else // CF_BITMAP
{
// no data to copy - we don't pass HBITMAP via global memory
return 0;
}
}
bool wxBitmapDataObject::GetDataHere(const wxDataFormat& format,
void *pBuf) const
{
wxASSERT_MSG( m_bitmap.IsOk(), wxT("copying invalid bitmap") );
HBITMAP hbmp = (HBITMAP)m_bitmap.GetHBITMAP();
if ( format.GetFormatId() == CF_DIB )
{
// create the DIB
ScreenHDC hdc;
// shouldn't be selected into a DC or GetDIBits() would fail
wxASSERT_MSG( !m_bitmap.GetSelectedInto(),
wxT("can't copy bitmap selected into wxMemoryDC") );
// first get the info
BITMAPINFO *pbi = (BITMAPINFO *)pBuf;
if ( !GetDIBits(hdc, hbmp, 0, 0, NULL, pbi, DIB_RGB_COLORS) )
{
wxLogLastError(wxT("GetDIBits(NULL)"));
return 0;
}
// and now copy the bits
if ( !GetDIBits(hdc, hbmp, 0, pbi->bmiHeader.biHeight, pbi + 1,
pbi, DIB_RGB_COLORS) )
{
wxLogLastError(wxT("GetDIBits"));
return false;
}
}
else // CF_BITMAP
{
// we put a bitmap handle into pBuf
*(HBITMAP *)pBuf = hbmp;
}
return true;
}
bool wxBitmapDataObject::SetData(const wxDataFormat& format,
size_t size, const void *pBuf)
{
HBITMAP hbmp;
if ( format.GetFormatId() == CF_DIB )
{
// here we get BITMAPINFO struct followed by the actual bitmap bits and
// BITMAPINFO starts with BITMAPINFOHEADER followed by colour info
ScreenHDC hdc;
BITMAPINFO *pbmi = (BITMAPINFO *)pBuf;
BITMAPINFOHEADER *pbmih = &pbmi->bmiHeader;
hbmp = CreateDIBitmap(hdc, pbmih, CBM_INIT,
pbmi + 1, pbmi, DIB_RGB_COLORS);
if ( !hbmp )
{
wxLogLastError(wxT("CreateDIBitmap"));
}
m_bitmap.SetWidth(pbmih->biWidth);
m_bitmap.SetHeight(pbmih->biHeight);
}
else // CF_BITMAP
{
// it's easy with bitmaps: we pass them by handle
hbmp = *(HBITMAP *)pBuf;
BITMAP bmp;
if ( !GetObject(hbmp, sizeof(BITMAP), &bmp) )
{
wxLogLastError(wxT("GetObject(HBITMAP)"));
}
m_bitmap.SetWidth(bmp.bmWidth);
m_bitmap.SetHeight(bmp.bmHeight);
m_bitmap.SetDepth(bmp.bmPlanes);
}
m_bitmap.SetHBITMAP((WXHBITMAP)hbmp);
wxASSERT_MSG( m_bitmap.IsOk(), wxT("pasting invalid bitmap") );
return true;
}
#endif // 0
// ----------------------------------------------------------------------------
// wxFileDataObject
// ----------------------------------------------------------------------------
bool wxFileDataObject::SetData(size_t WXUNUSED(size),
const void *WXUNUSED_IN_WINCE(pData))
{
#ifndef __WXWINCE__
m_filenames.Empty();
// the documentation states that the first member of DROPFILES structure is
// a "DWORD offset of double NUL terminated file list". What they mean by
// this (I wonder if you see it immediately) is that the list starts at
// ((char *)&(pDropFiles.pFiles)) + pDropFiles.pFiles. We're also advised
// to use DragQueryFile to work with this structure, but not told where and
// how to get HDROP.
HDROP hdrop = (HDROP)pData; // NB: it works, but I'm not sure about it
// get number of files (magic value -1)
UINT nFiles = ::DragQueryFile(hdrop, (unsigned)-1, NULL, 0u);
wxCHECK_MSG ( nFiles != (UINT)-1, FALSE, wxT("wrong HDROP handle") );
// for each file get the length, allocate memory and then get the name
wxString str;
UINT len, n;
for ( n = 0; n < nFiles; n++ ) {
// +1 for terminating NUL
len = ::DragQueryFile(hdrop, n, NULL, 0) + 1;
UINT len2 = ::DragQueryFile(hdrop, n, wxStringBuffer(str, len), len);
m_filenames.Add(str);
if ( len2 != len - 1 ) {
wxLogDebug(wxT("In wxFileDropTarget::OnDrop DragQueryFile returned\
%d characters, %d expected."), len2, len - 1);
}
}
return true;
#else
return false;
#endif
}
void wxFileDataObject::AddFile(const wxString& file)
{
// just add file to filenames array
// all useful data (such as DROPFILES struct) will be
// created later as necessary
m_filenames.Add(file);
}
size_t wxFileDataObject::GetDataSize() const
{
#ifndef __WXWINCE__
// size returned will be the size of the DROPFILES structure, plus the list
// of filesnames (null byte separated), plus a double null at the end
// if no filenames in list, size is 0
if ( m_filenames.empty() )
return 0;
#if wxUSE_UNICODE_MSLU
size_t sizeOfChar;
if ( wxGetOsVersion() == wxOS_WINDOWS_9X )
{
// Win9x always uses ANSI file names and MSLU doesn't help with this
sizeOfChar = sizeof(char);
}
else
{
sizeOfChar = sizeof(wxChar);
}
#else // !wxUSE_UNICODE_MSLU
static const size_t sizeOfChar = sizeof(wxChar);
#endif // wxUSE_UNICODE_MSLU/!wxUSE_UNICODE_MSLU
// inital size of DROPFILES struct + null byte
size_t sz = sizeof(DROPFILES) + sizeOfChar;
const size_t count = m_filenames.size();
for ( size_t i = 0; i < count; i++ )
{
// add filename length plus null byte
size_t len;
#if wxUSE_UNICODE_MSLU
if ( sizeOfChar == sizeof(char) )
len = strlen(m_filenames[i].mb_str(*wxConvFileName));
else
#endif // wxUSE_UNICODE_MSLU
len = m_filenames[i].length();
sz += (len + 1) * sizeOfChar;
}
return sz;
#else
return 0;
#endif
}
bool wxFileDataObject::GetDataHere(void *WXUNUSED_IN_WINCE(pData)) const
{
#ifndef __WXWINCE__
// pData points to an externally allocated memory block
// created using the size returned by GetDataSize()
// if pData is NULL, or there are no files, return
if ( !pData || m_filenames.empty() )
return false;
// convert data pointer to a DROPFILES struct pointer
LPDROPFILES pDrop = (LPDROPFILES) pData;
// initialize DROPFILES struct
pDrop->pFiles = sizeof(DROPFILES);
pDrop->fNC = FALSE; // not non-client coords
#if wxUSE_UNICODE_MSLU
pDrop->fWide = wxGetOsVersion() != wxOS_WINDOWS_9X ? TRUE : FALSE;
#else
pDrop->fWide = wxUSE_UNICODE;
#endif
const size_t sizeOfChar = pDrop->fWide ? sizeof(wchar_t) : sizeof(char);
// set start of filenames list (null separated)
BYTE *pbuf = (BYTE *)(pDrop + 1);
const size_t count = m_filenames.size();
for ( size_t i = 0; i < count; i++ )
{
// copy filename to pbuf and add null terminator
size_t len;
#if wxUSE_UNICODE_MSLU
if ( sizeOfChar == sizeof(char) )
{
wxCharBuffer buf(m_filenames[i].mb_str(*wxConvFileName));
len = strlen(buf);
memcpy(pbuf, buf, len*sizeOfChar);
}
else
#endif // wxUSE_UNICODE_MSLU
{
len = m_filenames[i].length();
memcpy(pbuf, m_filenames[i].wx_str(), len*sizeOfChar);
}
pbuf += len*sizeOfChar;
memset(pbuf, 0, sizeOfChar);
pbuf += sizeOfChar;
}
// add final null terminator
memset(pbuf, 0, sizeOfChar);
return true;
#else
return false;
#endif
}
// ----------------------------------------------------------------------------
// wxURLDataObject
// ----------------------------------------------------------------------------
// Work around bug in Wine headers
#if defined(__WINE__) && defined(CFSTR_SHELLURL) && wxUSE_UNICODE
#undef CFSTR_SHELLURL
#define CFSTR_SHELLURL wxT("CFSTR_SHELLURL")
#endif
class CFSTR_SHELLURLDataObject : public wxCustomDataObject
{
public:
CFSTR_SHELLURLDataObject() : wxCustomDataObject(CFSTR_SHELLURL) {}
virtual size_t GetBufferOffset( const wxDataFormat& WXUNUSED(format) )
{
return 0;
}
virtual const void* GetSizeFromBuffer( const void* buffer, size_t* size,
const wxDataFormat& WXUNUSED(format) )
{
// CFSTR_SHELLURL is _always_ ANSI text
*size = strlen( (const char*)buffer );
return buffer;
}
virtual void* SetSizeInBuffer( void* buffer, size_t WXUNUSED(size),
const wxDataFormat& WXUNUSED(format) )
{
return buffer;
}
wxDECLARE_NO_COPY_CLASS(CFSTR_SHELLURLDataObject);
};
wxURLDataObject::wxURLDataObject(const wxString& url)
{
// we support CF_TEXT and CFSTR_SHELLURL formats which are basically the
// same but it seems that some browsers only provide one of them so we have
// to support both
Add(new wxTextDataObject);
Add(new CFSTR_SHELLURLDataObject());
// we don't have any data yet
m_dataObjectLast = NULL;
if ( !url.empty() )
SetURL(url);
}
bool wxURLDataObject::SetData(const wxDataFormat& format,
size_t len,
const void *buf)
{
m_dataObjectLast = GetObject(format);
wxCHECK_MSG( m_dataObjectLast, FALSE,
wxT("unsupported format in wxURLDataObject"));
return m_dataObjectLast->SetData(len, buf);
}
wxString wxURLDataObject::GetURL() const
{
wxString url;
wxCHECK_MSG( m_dataObjectLast, url, wxT("no data in wxURLDataObject") );
if ( m_dataObjectLast->GetPreferredFormat() == CFSTR_SHELLURL )
{
const size_t len = m_dataObjectLast->GetDataSize();
if ( !len )
return wxString();
// CFSTR_SHELLURL is always ANSI so we need to convert it from it in
// Unicode build
#if wxUSE_UNICODE
wxCharBuffer buf(len);
if ( m_dataObjectLast->GetDataHere(buf.data()) )
url = buf;
#else // !wxUSE_UNICODE
// in ANSI build no conversion is necessary
m_dataObjectLast->GetDataHere(wxStringBuffer(url, len));
#endif // wxUSE_UNICODE/!wxUSE_UNICODE
}
else // must be wxTextDataObject
{
url = static_cast<wxTextDataObject *>(m_dataObjectLast)->GetText();
}
return url;
}
void wxURLDataObject::SetURL(const wxString& url)
{
wxCharBuffer urlMB(url.mb_str());
if ( urlMB )
{
const size_t len = strlen(urlMB);
#if !wxUSE_UNICODE
// wxTextDataObject takes the number of characters in the string, not
// the size of the buffer (which would be len+1)
SetData(wxDF_TEXT, len, urlMB);
#endif // !wxUSE_UNICODE
// however CFSTR_SHELLURLDataObject doesn't append NUL automatically
// but we probably still want to have it on the clipboard (just to be
// safe), so do append it
SetData(wxDataFormat(CFSTR_SHELLURL), len + 1, urlMB);
}
#if wxUSE_UNICODE
SetData(wxDF_UNICODETEXT, url.length()*sizeof(wxChar), url.wc_str());
#endif
}
// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------
#if wxDEBUG_LEVEL
static const wxChar *GetTymedName(DWORD tymed)
{
static wxChar s_szBuf[128];
switch ( tymed ) {
case TYMED_HGLOBAL: return wxT("TYMED_HGLOBAL");
case TYMED_FILE: return wxT("TYMED_FILE");
case TYMED_ISTREAM: return wxT("TYMED_ISTREAM");
case TYMED_ISTORAGE: return wxT("TYMED_ISTORAGE");
case TYMED_GDI: return wxT("TYMED_GDI");
case TYMED_MFPICT: return wxT("TYMED_MFPICT");
case TYMED_ENHMF: return wxT("TYMED_ENHMF");
default:
wxSprintf(s_szBuf, wxT("type of media format %ld (unknown)"), tymed);
return s_szBuf;
}
}
#endif // Debug
#else // not using OLE at all
// ----------------------------------------------------------------------------
// wxDataObject
// ----------------------------------------------------------------------------
#if wxUSE_DATAOBJ
wxDataObject::wxDataObject()
{
}
wxDataObject::~wxDataObject()
{
}
void wxDataObject::SetAutoDelete()
{
}
const wxChar *wxDataObject::GetFormatName(wxDataFormat WXUNUSED(format))
{
return NULL;
}
#endif // wxUSE_DATAOBJ
#endif // wxUSE_OLE/!wxUSE_OLE
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