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wine/dlls/winemac.drv/dragdrop.c
Ken Thomases 782959168a winemac: Change macdrv_copy_pasteboard_formats() to return a C array instead of a CFArray. 
Renamed it to macdrv_get_pasteboard_formats(), since the "copy" was meant to
convey Core Foundation ownership semantics which no longer apply.

Signed-off-by: Ken Thomases <ken@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2016-10-24 11:10:06 +02:00

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/*
* MACDRV Drag and drop code
*
* Copyright 2003 Ulrich Czekalla
* Copyright 2007 Damjan Jovanovic
* Copyright 2013 Ken Thomases for CodeWeavers Inc.
*
* 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"
#define NONAMELESSUNION
#include "macdrv.h"
#define COBJMACROS
#include "objidl.h"
#include "shellapi.h"
#include "shlobj.h"
WINE_DEFAULT_DEBUG_CHANNEL(dragdrop);
static IDataObject *active_data_object;
static HWND last_droptarget_hwnd;
typedef struct
{
IDataObject IDataObject_iface;
LONG ref;
CFTypeRef pasteboard;
} DragDropDataObject;
static inline DragDropDataObject *impl_from_IDataObject(IDataObject *iface)
{
return CONTAINING_RECORD(iface, DragDropDataObject, IDataObject_iface);
}
static HRESULT WINAPI dddo_QueryInterface(IDataObject* iface, REFIID riid, LPVOID *ppvObj)
{
DragDropDataObject *This = impl_from_IDataObject(iface);
TRACE("(%p)->(%s,%p)\n", This, debugstr_guid(riid), ppvObj);
if (IsEqualIID(riid, &IID_IUnknown) || (IsEqualIID(riid, &IID_IDataObject)))
{
*ppvObj = This;
IUnknown_AddRef((IUnknown*)This);
return S_OK;
}
*ppvObj = NULL;
return E_NOINTERFACE;
}
static ULONG WINAPI dddo_AddRef(IDataObject* iface)
{
DragDropDataObject *This = impl_from_IDataObject(iface);
ULONG refCount = InterlockedIncrement(&This->ref);
TRACE("(%p)->(count=%u)\n", This, refCount - 1);
return refCount;
}
static ULONG WINAPI dddo_Release(IDataObject* iface)
{
DragDropDataObject *This = impl_from_IDataObject(iface);
ULONG refCount = InterlockedDecrement(&This->ref);
TRACE("(%p)->(count=%u)\n", This, refCount + 1);
if (refCount)
return refCount;
TRACE("-- destroying DragDropDataObject (%p)\n", This);
CFRelease(This->pasteboard);
HeapFree(GetProcessHeap(), 0, This);
return 0;
}
static HRESULT WINAPI dddo_GetData(IDataObject* iface, FORMATETC* formatEtc, STGMEDIUM* medium)
{
DragDropDataObject *This = impl_from_IDataObject(iface);
HRESULT hr;
TRACE("This %p formatEtc %s\n", This, debugstr_format(formatEtc->cfFormat));
hr = IDataObject_QueryGetData(iface, formatEtc);
if (SUCCEEDED(hr))
{
medium->tymed = TYMED_HGLOBAL;
medium->u.hGlobal = macdrv_get_pasteboard_data(This->pasteboard, formatEtc->cfFormat);
medium->pUnkForRelease = NULL;
hr = medium->u.hGlobal ? S_OK : E_OUTOFMEMORY;
}
return hr;
}
static HRESULT WINAPI dddo_GetDataHere(IDataObject* iface, FORMATETC* formatEtc,
STGMEDIUM* medium)
{
FIXME("iface %p formatEtc %p medium %p; stub\n", iface, formatEtc, medium);
return DATA_E_FORMATETC;
}
static HRESULT WINAPI dddo_QueryGetData(IDataObject* iface, FORMATETC* formatEtc)
{
DragDropDataObject *This = impl_from_IDataObject(iface);
HRESULT hr = DV_E_FORMATETC;
TRACE("This %p formatEtc %p={.tymed=0x%x, .dwAspect=%d, .cfFormat=%s}\n",
This, formatEtc, formatEtc->tymed, formatEtc->dwAspect,
debugstr_format(formatEtc->cfFormat));
if (formatEtc->tymed && !(formatEtc->tymed & TYMED_HGLOBAL))
{
FIXME("only HGLOBAL medium types supported right now\n");
return DV_E_TYMED;
}
if (formatEtc->dwAspect != DVASPECT_CONTENT)
{
FIXME("only the content aspect is supported right now\n");
return E_NOTIMPL;
}
if (macdrv_pasteboard_has_format(This->pasteboard, formatEtc->cfFormat))
hr = S_OK;
TRACE(" -> 0x%x\n", hr);
return hr;
}
static HRESULT WINAPI dddo_GetConicalFormatEtc(IDataObject* iface, FORMATETC* formatEtc,
FORMATETC* formatEtcOut)
{
DragDropDataObject *This = impl_from_IDataObject(iface);
TRACE("This %p formatEtc %p={.tymed=0x%x, .dwAspect=%d, .cfFormat=%s}\n",
This, formatEtc, formatEtc->tymed, formatEtc->dwAspect,
debugstr_format(formatEtc->cfFormat));
*formatEtcOut = *formatEtc;
formatEtcOut->ptd = NULL;
return DATA_S_SAMEFORMATETC;
}
static HRESULT WINAPI dddo_SetData(IDataObject* iface, FORMATETC* formatEtc,
STGMEDIUM* medium, BOOL fRelease)
{
DragDropDataObject *This = impl_from_IDataObject(iface);
TRACE("This %p formatEtc %p={.tymed=0x%x, .dwAspect=%d, .cfFormat=%s} medium %p fRelease %d\n",
This, formatEtc, formatEtc->tymed, formatEtc->dwAspect,
debugstr_format(formatEtc->cfFormat), medium, fRelease);
return E_NOTIMPL;
}
static HRESULT WINAPI dddo_EnumFormatEtc(IDataObject* iface, DWORD direction,
IEnumFORMATETC** enumFormatEtc)
{
DragDropDataObject *This = impl_from_IDataObject(iface);
UINT *formats, count;
HRESULT hr;
TRACE("This %p direction %u enumFormatEtc %p\n", This, direction, enumFormatEtc);
if (direction != DATADIR_GET)
{
WARN("only the get direction is implemented\n");
return E_NOTIMPL;
}
formats = macdrv_get_pasteboard_formats(This->pasteboard, &count);
if (formats)
{
FORMATETC *formatEtcs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(FORMATETC));
if (formatEtcs)
{
INT i;
for (i = 0; i < count; i++)
{
formatEtcs[i].cfFormat = formats[i];
formatEtcs[i].ptd = NULL;
formatEtcs[i].dwAspect = DVASPECT_CONTENT;
formatEtcs[i].lindex = -1;
formatEtcs[i].tymed = TYMED_HGLOBAL;
}
hr = SHCreateStdEnumFmtEtc(count, formatEtcs, enumFormatEtc);
HeapFree(GetProcessHeap(), 0, formatEtcs);
}
else
hr = E_OUTOFMEMORY;
HeapFree(GetProcessHeap(), 0, formats);
}
else
hr = SHCreateStdEnumFmtEtc(0, NULL, enumFormatEtc);
TRACE(" -> 0x%x\n", hr);
return hr;
}
static HRESULT WINAPI dddo_DAdvise(IDataObject* iface, FORMATETC* formatEtc, DWORD advf,
IAdviseSink* pAdvSink, DWORD* pdwConnection)
{
FIXME("(%p, %p, %u, %p, %p): stub\n", iface, formatEtc, advf,
pAdvSink, pdwConnection);
return OLE_E_ADVISENOTSUPPORTED;
}
static HRESULT WINAPI dddo_DUnadvise(IDataObject* iface, DWORD dwConnection)
{
FIXME("(%p, %u): stub\n", iface, dwConnection);
return OLE_E_ADVISENOTSUPPORTED;
}
static HRESULT WINAPI dddo_EnumDAdvise(IDataObject* iface, IEnumSTATDATA** pEnumAdvise)
{
FIXME("(%p, %p): stub\n", iface, pEnumAdvise);
return OLE_E_ADVISENOTSUPPORTED;
}
static const IDataObjectVtbl dovt =
{
dddo_QueryInterface,
dddo_AddRef,
dddo_Release,
dddo_GetData,
dddo_GetDataHere,
dddo_QueryGetData,
dddo_GetConicalFormatEtc,
dddo_SetData,
dddo_EnumFormatEtc,
dddo_DAdvise,
dddo_DUnadvise,
dddo_EnumDAdvise
};
static IDataObject *create_data_object_for_pasteboard(CFTypeRef pasteboard)
{
DragDropDataObject *dddo;
dddo = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*dddo));
if (!dddo)
return NULL;
dddo->ref = 1;
dddo->IDataObject_iface.lpVtbl = &dovt;
dddo->pasteboard = CFRetain(pasteboard);
return &dddo->IDataObject_iface;
}
/**************************************************************************
* drag_operations_to_dropeffects
*/
static DWORD drag_operations_to_dropeffects(uint32_t ops)
{
DWORD effects = DROPEFFECT_NONE;
if (ops & (DRAG_OP_COPY | DRAG_OP_GENERIC))
effects |= DROPEFFECT_COPY;
if (ops & DRAG_OP_MOVE)
effects |= DROPEFFECT_MOVE;
if (ops & (DRAG_OP_LINK | DRAG_OP_GENERIC))
effects |= DROPEFFECT_LINK;
return effects;
}
/**************************************************************************
* dropeffect_to_drag_operation
*/
static uint32_t dropeffect_to_drag_operation(DWORD effect, uint32_t ops)
{
if (effect & DROPEFFECT_LINK && ops & DRAG_OP_LINK) return DRAG_OP_LINK;
if (effect & DROPEFFECT_COPY && ops & DRAG_OP_COPY) return DRAG_OP_COPY;
if (effect & DROPEFFECT_MOVE && ops & DRAG_OP_MOVE) return DRAG_OP_MOVE;
if (effect & DROPEFFECT_LINK && ops & DRAG_OP_GENERIC) return DRAG_OP_GENERIC;
if (effect & DROPEFFECT_COPY && ops & DRAG_OP_GENERIC) return DRAG_OP_GENERIC;
return DRAG_OP_NONE;
}
/* Based on functions in dlls/ole32/ole2.c */
static HANDLE get_droptarget_local_handle(HWND hwnd)
{
static const WCHAR prop_marshalleddroptarget[] =
{'W','i','n','e','M','a','r','s','h','a','l','l','e','d','D','r','o','p','T','a','r','g','e','t',0};
HANDLE handle;
HANDLE local_handle = 0;
handle = GetPropW(hwnd, prop_marshalleddroptarget);
if (handle)
{
DWORD pid;
HANDLE process;
GetWindowThreadProcessId(hwnd, &pid);
process = OpenProcess(PROCESS_DUP_HANDLE, FALSE, pid);
if (process)
{
DuplicateHandle(process, handle, GetCurrentProcess(), &local_handle, 0, FALSE, DUPLICATE_SAME_ACCESS);
CloseHandle(process);
}
}
return local_handle;
}
static HRESULT create_stream_from_map(HANDLE map, IStream **stream)
{
HRESULT hr = E_OUTOFMEMORY;
HGLOBAL hmem;
void *data;
MEMORY_BASIC_INFORMATION info;
data = MapViewOfFile(map, FILE_MAP_READ, 0, 0, 0);
if(!data) return hr;
VirtualQuery(data, &info, sizeof(info));
TRACE("size %d\n", (int)info.RegionSize);
hmem = GlobalAlloc(GMEM_MOVEABLE, info.RegionSize);
if(hmem)
{
memcpy(GlobalLock(hmem), data, info.RegionSize);
GlobalUnlock(hmem);
hr = CreateStreamOnHGlobal(hmem, TRUE, stream);
}
UnmapViewOfFile(data);
return hr;
}
static IDropTarget* get_droptarget_pointer(HWND hwnd)
{
IDropTarget *droptarget = NULL;
HANDLE map;
IStream *stream;
map = get_droptarget_local_handle(hwnd);
if(!map) return NULL;
if(SUCCEEDED(create_stream_from_map(map, &stream)))
{
CoUnmarshalInterface(stream, &IID_IDropTarget, (void**)&droptarget);
IStream_Release(stream);
}
CloseHandle(map);
return droptarget;
}
/**************************************************************************
* query_drag_drop
*/
BOOL query_drag_drop(macdrv_query* query)
{
BOOL ret = FALSE;
HWND hwnd = macdrv_get_window_hwnd(query->window);
struct macdrv_win_data *data = get_win_data(hwnd);
POINT pt;
IDropTarget *droptarget;
TRACE("win %p/%p x,y %d,%d op 0x%08x pasteboard %p\n", hwnd, query->window,
query->drag_drop.x, query->drag_drop.y, query->drag_drop.op, query->drag_drop.pasteboard);
if (!data)
{
WARN("no win_data for win %p/%p\n", hwnd, query->window);
return FALSE;
}
pt.x = query->drag_drop.x + data->whole_rect.left;
pt.y = query->drag_drop.y + data->whole_rect.top;
release_win_data(data);
droptarget = get_droptarget_pointer(last_droptarget_hwnd);
if (droptarget)
{
HRESULT hr;
POINTL pointl;
DWORD effect = drag_operations_to_dropeffects(query->drag_drop.op);
if (!active_data_object)
{
WARN("shouldn't happen: no active IDataObject\n");
active_data_object = create_data_object_for_pasteboard(query->drag_drop.pasteboard);
}
pointl.x = pt.x;
pointl.y = pt.y;
TRACE("Drop hwnd %p droptarget %p pointl (%d,%d) effect 0x%08x\n", last_droptarget_hwnd,
droptarget, pointl.x, pointl.y, effect);
hr = IDropTarget_Drop(droptarget, active_data_object, MK_LBUTTON, pointl, &effect);
if (SUCCEEDED(hr))
{
if (effect != DROPEFFECT_NONE)
{
TRACE("drop succeeded\n");
ret = TRUE;
}
else
TRACE("the application refused the drop\n");
}
else
WARN("drop failed, error 0x%08X\n", hr);
IDropTarget_Release(droptarget);
}
else
{
hwnd = WindowFromPoint(pt);
while (hwnd && !(GetWindowLongW(hwnd, GWL_EXSTYLE) & WS_EX_ACCEPTFILES))
hwnd = GetParent(hwnd);
if (hwnd)
{
HDROP hdrop = macdrv_get_pasteboard_data(query->drag_drop.pasteboard, CF_HDROP);
DROPFILES *dropfiles = GlobalLock(hdrop);
if (dropfiles)
{
dropfiles->pt.x = pt.x;
dropfiles->pt.y = pt.y;
dropfiles->fNC = TRUE;
TRACE("sending WM_DROPFILES: hwnd %p pt %s %s\n", hwnd, wine_dbgstr_point(&pt),
debugstr_w((WCHAR*)((char*)dropfiles + dropfiles->pFiles)));
GlobalUnlock(hdrop);
ret = PostMessageW(hwnd, WM_DROPFILES, (WPARAM)hdrop, 0L);
/* hdrop is owned by the message and freed when the recipient calls DragFinish(). */
}
if (!ret) GlobalFree(hdrop);
}
}
if (active_data_object) IDataObject_Release(active_data_object);
active_data_object = NULL;
last_droptarget_hwnd = NULL;
return ret;
}
/**************************************************************************
* query_drag_exited
*/
BOOL query_drag_exited(macdrv_query* query)
{
HWND hwnd = macdrv_get_window_hwnd(query->window);
IDropTarget *droptarget;
TRACE("win %p/%p\n", hwnd, query->window);
droptarget = get_droptarget_pointer(last_droptarget_hwnd);
if (droptarget)
{
HRESULT hr;
TRACE("DragLeave hwnd %p droptarget %p\n", last_droptarget_hwnd, droptarget);
hr = IDropTarget_DragLeave(droptarget);
if (FAILED(hr))
WARN("IDropTarget_DragLeave failed, error 0x%08X\n", hr);
IDropTarget_Release(droptarget);
}
if (active_data_object) IDataObject_Release(active_data_object);
active_data_object = NULL;
last_droptarget_hwnd = NULL;
return TRUE;
}
/**************************************************************************
* query_drag_operation
*/
BOOL query_drag_operation(macdrv_query* query)
{
BOOL ret = FALSE;
HWND hwnd = macdrv_get_window_hwnd(query->window);
struct macdrv_win_data *data = get_win_data(hwnd);
POINT pt;
DWORD effect;
IDropTarget *droptarget;
HRESULT hr;
TRACE("win %p/%p x,y %d,%d offered_ops 0x%x pasteboard %p\n", hwnd, query->window,
query->drag_operation.x, query->drag_operation.y, query->drag_operation.offered_ops,
query->drag_operation.pasteboard);
if (!data)
{
WARN("no win_data for win %p/%p\n", hwnd, query->window);
return FALSE;
}
pt.x = query->drag_operation.x + data->whole_rect.left;
pt.y = query->drag_operation.y + data->whole_rect.top;
release_win_data(data);
effect = drag_operations_to_dropeffects(query->drag_operation.offered_ops);
/* Instead of the top-level window we got in the query, start with the deepest
child under the cursor. Travel up the hierarchy looking for a window that
has an associated IDropTarget. */
hwnd = WindowFromPoint(pt);
do
{
droptarget = get_droptarget_pointer(hwnd);
} while (!droptarget && (hwnd = GetParent(hwnd)));
if (last_droptarget_hwnd != hwnd)
{
if (last_droptarget_hwnd)
{
IDropTarget *old_droptarget = get_droptarget_pointer(last_droptarget_hwnd);
if (old_droptarget)
{
TRACE("DragLeave hwnd %p droptarget %p\n", last_droptarget_hwnd, old_droptarget);
hr = IDropTarget_DragLeave(old_droptarget);
if (FAILED(hr))
WARN("IDropTarget_DragLeave failed, error 0x%08X\n", hr);
IDropTarget_Release(old_droptarget);
}
}
last_droptarget_hwnd = hwnd;
if (droptarget)
{
POINTL pointl = { pt.x, pt.y };
if (!active_data_object)
active_data_object = create_data_object_for_pasteboard(query->drag_operation.pasteboard);
TRACE("DragEnter hwnd %p droptarget %p\n", hwnd, droptarget);
hr = IDropTarget_DragEnter(droptarget, active_data_object, MK_LBUTTON,
pointl, &effect);
if (SUCCEEDED(hr))
{
query->drag_operation.accepted_op = dropeffect_to_drag_operation(effect,
query->drag_operation.offered_ops);
TRACE(" effect %d accepted op %d\n", effect, query->drag_operation.accepted_op);
ret = TRUE;
}
else
WARN("IDropTarget_DragEnter failed, error 0x%08X\n", hr);
IDropTarget_Release(droptarget);
}
}
else if (droptarget)
{
POINTL pointl = { pt.x, pt.y };
TRACE("DragOver hwnd %p droptarget %p\n", hwnd, droptarget);
hr = IDropTarget_DragOver(droptarget, MK_LBUTTON, pointl, &effect);
if (SUCCEEDED(hr))
{
query->drag_operation.accepted_op = dropeffect_to_drag_operation(effect,
query->drag_operation.offered_ops);
TRACE(" effect %d accepted op %d\n", effect, query->drag_operation.accepted_op);
ret = TRUE;
}
else
WARN("IDropTarget_DragOver failed, error 0x%08X\n", hr);
IDropTarget_Release(droptarget);
}
if (!ret)
{
hwnd = WindowFromPoint(pt);
while (hwnd && !(GetWindowLongW(hwnd, GWL_EXSTYLE) & WS_EX_ACCEPTFILES))
hwnd = GetParent(hwnd);
if (hwnd)
{
FORMATETC formatEtc;
if (!active_data_object)
active_data_object = create_data_object_for_pasteboard(query->drag_operation.pasteboard);
formatEtc.cfFormat = CF_HDROP;
formatEtc.ptd = NULL;
formatEtc.dwAspect = DVASPECT_CONTENT;
formatEtc.lindex = -1;
formatEtc.tymed = TYMED_HGLOBAL;
if (SUCCEEDED(IDataObject_QueryGetData(active_data_object, &formatEtc)))
{
TRACE("WS_EX_ACCEPTFILES hwnd %p\n", hwnd);
query->drag_operation.accepted_op = DRAG_OP_GENERIC;
ret = TRUE;
}
}
}
TRACE(" -> %s\n", ret ? "TRUE" : "FALSE");
return ret;
}
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