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gtk2/gdk/win32/gdkdnd-win32.c
Dieter Verfaillie 5406955f7c win32: Fix DnD when drag icon is below the pointer 
By reverting gdk_drag_find_window_for_screen logic to what it was
before eb21a7df29.
The old logic knew how to ignore drag_window when searching
for dest_window, but that code was removed (I guess by accident).

https://bugzilla.gnome.org/show_bug.cgi?id=616544
2011-11-10 17:40:51 +01:00

2511 lines
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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 2001 Archaeopteryx Software Inc.
* Copyright (C) 1998-2002 Tor Lillqvist
*
* 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 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <string.h>
#include <io.h>
#include <fcntl.h>
/*
* Comment from the old OLE2 DND code that is being merged in. Note
* that this comment might not fully reflect reality as the code
* obviously will have to be modified in this merge. Especially the
* talk about supporting other than UTF-8 text is bogus, that will not
* happen.
*
* Support for OLE-2 drag and drop added at Archaeopteryx Software, 2001
* For more information, contact Stephan R.A. Deibel (sdeibel@archaeopteryx.com)
*
* Notes on implementation:
*
* This is a first pass at OLE2 support. It only supports text and unicode text
* data types, and file list dnd (which is handled seperately as it predates OLE2
* both in this implementation and on Windows in general).
*
* As such, the data type conversion from gdk selection targets to OLE2 CF_* data
* type specifiers is partially hardwired. Fixing this is complicated by (a) the
* fact that the widget's declared selection types aren't accessible in calls here
* that need to declare the corresponding OLE2 data types, and (b) there isn't a
* 1-1 correspondence between gdk target types and OLE2 types. The former needs
* some redesign in gtk dnd (something a gdk/gtk expert should do; I have tried
* and failed!). As an example of the latter: gdk STRING, TEXT, COMPOUND_TEXT map
* to CF_TEXT, CF_OEMTEXT, and CF_UNICODETEXT but as a group and with conversions
* necessary for various combinations. Currently, the code here (and in
* gdkdnd-win32.c) can handle gdk STRING and TEXT but not COMPOUND_TEXT, and OLE2
* CF_TEXT and CF_UNICODETEXT but not CF_OEMTEXT. The necessary conversions are
* supplied by the implementation here.
*
* Note that in combination with another hack originated by Archaeopteryx
* Software, the text conversions here may go to utf-8 unicode as the standard
* within-gtk target or to single-byte ascii when the USE_ACP_TEXT compilation
* flag is TRUE. This mode was added to support applications that aren't using
* utf-8 across the gtk/gdk API but instead use single-byte ascii according to
* the current Windows code page. See gdkim-win32.c for more info on that.
*
*/
#define INITGUID
#include "gdkdnd.h"
#include "gdkproperty.h"
#include "gdkinternals.h"
#include "gdkprivate-win32.h"
#include "gdkwin32.h"
#include "gdkwin32dnd.h"
#include "gdk/gdkdndprivate.h"
#include <ole2.h>
#include <shlobj.h>
#include <shlguid.h>
#include <gdk/gdk.h>
#include <glib/gstdio.h>
typedef struct _GdkDragContextPrivateWin32 GdkDragContextPrivateWin32;
typedef enum {
GDK_DRAG_STATUS_DRAG,
GDK_DRAG_STATUS_MOTION_WAIT,
GDK_DRAG_STATUS_ACTION_WAIT,
GDK_DRAG_STATUS_DROP
} GdkDragStatus;
/* Structure that holds information about a drag in progress.
* this is used on both source and destination sides.
*/
struct _GdkDragContextPrivateWin32 {
gboolean being_finalized;
gint ref_count;
IUnknown *iface;
DWORD last_key_state;
POINT last_pt; /* Coordinates from last event */
guint drag_status : 4; /* Current status of drag */
guint drop_failed : 1; /* Whether the drop was unsuccessful */
};
#define PRIVATE_DATA(context) (GDK_WIN32_DRAG_CONTEXT (context)->windowing_data)
static GList *contexts;
static GdkDragContext *current_dest_drag = NULL;
struct _GdkWin32DragContext
{
GdkDragContext context;
GdkDragContextPrivateWin32 *windowing_data;
};
struct _GdkWin32DragContextClass
{
GdkDragContextClass parent_class;
};
G_DEFINE_TYPE (GdkWin32DragContext, gdk_win32_drag_context, GDK_TYPE_DRAG_CONTEXT)
static gboolean use_ole2_dnd = FALSE;
static void
gdk_win32_drag_context_init (GdkWin32DragContext *dragcontext)
{
GdkDragContextPrivateWin32 *private;
private = G_TYPE_INSTANCE_GET_PRIVATE (dragcontext,
GDK_TYPE_DRAG_CONTEXT,
GdkDragContextPrivateWin32);
dragcontext->windowing_data = private;
if (!use_ole2_dnd)
{
contexts = g_list_prepend (contexts, dragcontext);
}
else
{
private->being_finalized = FALSE;
private->ref_count = 1;
private->iface = NULL;
}
GDK_NOTE (DND, g_print ("gdk_drag_context_init %p\n", dragcontext));
}
static void
gdk_win32_drag_context_finalize (GObject *object)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (object);
GDK_NOTE (DND, g_print ("gdk_drag_context_finalize %p\n", object));
g_list_free (context->targets);
if (context->source_window)
g_object_unref (context->source_window);
if (context->dest_window)
g_object_unref (context->dest_window);
if (!use_ole2_dnd)
{
contexts = g_list_remove (contexts, context);
if (context == current_dest_drag)
current_dest_drag = NULL;
}
else
{
GdkDragContextPrivateWin32 *private = PRIVATE_DATA (context);
if (private->iface)
{
private->being_finalized = TRUE;
private->iface->lpVtbl->Release (private->iface);
private->iface = NULL;
}
}
G_OBJECT_CLASS (gdk_win32_drag_context_parent_class)->finalize (object);
}
/* Drag Contexts */
GdkDragContext *
gdk_drag_context_new (void)
{
return g_object_new (GDK_TYPE_DRAG_CONTEXT, NULL);
}
static GdkDragContext *
gdk_drag_context_find (gboolean is_source,
GdkWindow *source,
GdkWindow *dest)
{
GList *tmp_list = contexts;
GdkDragContext *context;
GdkDragContextPrivateWin32 *private;
while (tmp_list)
{
context = (GdkDragContext *)tmp_list->data;
private = PRIVATE_DATA (context);
if ((!context->is_source == !is_source) &&
((source == NULL) || (context->source_window && (context->source_window == source))) &&
((dest == NULL) || (context->dest_window && (context->dest_window == dest))))
return context;
tmp_list = tmp_list->next;
}
return NULL;
}
#define PRINT_GUID(guid) \
g_print ("%.08lx-%.04x-%.04x-%.02x%.02x-%.02x%.02x%.02x%.02x%.02x%.02x", \
((gulong *) guid)[0], \
((gushort *) guid)[2], \
((gushort *) guid)[3], \
((guchar *) guid)[8], \
((guchar *) guid)[9], \
((guchar *) guid)[10], \
((guchar *) guid)[11], \
((guchar *) guid)[12], \
((guchar *) guid)[13], \
((guchar *) guid)[14], \
((guchar *) guid)[15]);
static FORMATETC *formats;
static int nformats;
typedef struct {
IDropTarget idt;
GdkDragContext *context;
} target_drag_context;
typedef struct {
IDropSource ids;
GdkDragContext *context;
} source_drag_context;
typedef struct {
IDataObject ido;
int ref_count;
GdkDragContext *context;
} data_object;
typedef struct {
IEnumFORMATETC ief;
int ref_count;
int ix;
} enum_formats;
static source_drag_context *pending_src_context = NULL;
static IDataObject *dnd_data = NULL;
static enum_formats *enum_formats_new (void);
/* map windows -> target drag contexts. The table
* owns a ref to both objects.
*/
static GHashTable* target_ctx_for_window = NULL;
static ULONG STDMETHODCALLTYPE
idroptarget_addref (LPDROPTARGET This)
{
target_drag_context *ctx = (target_drag_context *) This;
GdkDragContextPrivateWin32 *private = PRIVATE_DATA (ctx->context);
int ref_count = ++private->ref_count;
GDK_NOTE (DND, g_print ("idroptarget_addref %p %d\n", This, ref_count));
g_object_ref (G_OBJECT (ctx->context));
return ref_count;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_queryinterface (LPDROPTARGET This,
REFIID riid,
LPVOID *ppvObject)
{
GDK_NOTE (DND, {
g_print ("idroptarget_queryinterface %p ", This);
PRINT_GUID (riid);
});
*ppvObject = NULL;
if (IsEqualGUID (riid, &IID_IUnknown))
{
GDK_NOTE (DND, g_print ("...IUnknown S_OK\n"));
idroptarget_addref (This);
*ppvObject = This;
return S_OK;
}
else if (IsEqualGUID (riid, &IID_IDropTarget))
{
GDK_NOTE (DND, g_print ("...IDropTarget S_OK\n"));
idroptarget_addref (This);
*ppvObject = This;
return S_OK;
}
else
{
GDK_NOTE (DND, g_print ("...E_NOINTERFACE\n"));
return E_NOINTERFACE;
}
}
static ULONG STDMETHODCALLTYPE
idroptarget_release (LPDROPTARGET This)
{
target_drag_context *ctx = (target_drag_context *) This;
GdkDragContextPrivateWin32 *private = PRIVATE_DATA (ctx->context);
int ref_count = --private->ref_count;
GDK_NOTE (DND, g_print ("idroptarget_release %p %d\n", This, ref_count));
if (!private->being_finalized)
g_object_unref (G_OBJECT (ctx->context));
if (ref_count == 0)
g_free (This);
return ref_count;
}
#if 0
static GdkAtom
cf_to_atom (CLIPFORMAT cf)
{
switch (cf)
{
case CF_UNICODETEXT:
return _utf8_string;
case CF_HDROP:
return _text_uri_list;
case CF_DIB:
return _image_bmp;
}
if (cf == _cf_url)
return _text_uri_list;
if (cf == _cf_html_format || cf == _cf_text_html)
return _text_html;
return GDK_NONE;
}
#endif
static GdkDragAction
get_suggested_action (DWORD grfKeyState)
{
/* This is the yucky Windows standard: Force link action if both
* Control and Alt are down, copy if Control is down alone, move if
* Alt is down alone, or use default of move within the app or copy
* when origin of the drag is in another app.
*/
if (grfKeyState & MK_CONTROL && grfKeyState & MK_SHIFT)
return GDK_ACTION_LINK; /* Link action not supported */
else if (grfKeyState & MK_CONTROL)
return GDK_ACTION_COPY;
else if (grfKeyState & MK_ALT)
return GDK_ACTION_MOVE;
#if 0 /* Default is always copy for now */
else if (_dnd_source_state == GDK_WIN32_DND_DRAGGING)
return GDK_ACTION_MOVE;
#endif
else
return GDK_ACTION_COPY;
/* Any way to determine when to add in DROPEFFECT_SCROLL? */
}
/* Process pending events -- we don't want to service non-GUI events
* forever so do one iteration and then do more only if there's a
* pending GDK event.
*/
static void
process_pending_events ()
{
g_main_context_iteration (NULL, FALSE);
while (_gdk_event_queue_find_first (_gdk_display))
g_main_context_iteration (NULL, FALSE);
}
static DWORD
drop_effect_for_action (GdkDragAction action)
{
switch (action)
{
case GDK_ACTION_MOVE:
return DROPEFFECT_MOVE;
case GDK_ACTION_LINK:
return DROPEFFECT_LINK;
case GDK_ACTION_COPY:
return DROPEFFECT_COPY;
default:
return DROPEFFECT_NONE;
}
}
static void
dnd_event_put (GdkEventType type,
GdkDragContext *context,
const POINTL pt,
gboolean to_dest_window)
{
GdkEvent *e;
e = gdk_event_new (type);
if (to_dest_window)
e->dnd.window = context->dest_window;
else
e->dnd.window = context->source_window;
e->dnd.send_event = FALSE;
e->dnd.context = g_object_ref (context);
e->dnd.time = GDK_CURRENT_TIME;
e->dnd.x_root = pt.x + _gdk_offset_x;
e->dnd.y_root = pt.x + _gdk_offset_y;
if (e->dnd.window != NULL)
g_object_ref (e->dnd.window);
gdk_event_set_device (e, gdk_drag_context_get_device (context));
GDK_NOTE (EVENTS, _gdk_win32_print_event (e));
gdk_event_put (e);
gdk_event_free (e);
}
static HRESULT STDMETHODCALLTYPE
idroptarget_dragenter (LPDROPTARGET This,
LPDATAOBJECT pDataObj,
DWORD grfKeyState,
POINTL pt,
LPDWORD pdwEffect)
{
target_drag_context *ctx = (target_drag_context *) This;
GDK_NOTE (DND, g_print ("idroptarget_dragenter %p S_OK\n", This));
ctx->context->suggested_action = get_suggested_action (grfKeyState);
dnd_event_put (GDK_DRAG_ENTER, ctx->context, pt, TRUE);
process_pending_events ();
*pdwEffect = drop_effect_for_action (ctx->context->action);
/* Assume that target can accept the data: In fact it may fail but
* we are not really set up to query the target!
*/
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_dragover (LPDROPTARGET This,
DWORD grfKeyState,
POINTL pt,
LPDWORD pdwEffect)
{
target_drag_context *ctx = (target_drag_context *) This;
GDK_NOTE (DND, g_print ("idroptarget_dragover %p S_OK\n", This));
ctx->context->suggested_action = get_suggested_action (grfKeyState);
dnd_event_put (GDK_DRAG_MOTION, ctx->context, pt, TRUE);
process_pending_events ();
*pdwEffect = drop_effect_for_action (ctx->context->action);
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_dragleave (LPDROPTARGET This)
{
target_drag_context *ctx = (target_drag_context *) This;
POINTL pt = { 0, 0 };
GDK_NOTE (DND, g_print ("idroptarget_dragleave %p S_OK\n", This));
dnd_event_put (GDK_DRAG_LEAVE, ctx->context, pt, TRUE);
process_pending_events ();
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_drop (LPDROPTARGET This,
LPDATAOBJECT pDataObj,
DWORD grfKeyState,
POINTL pt,
LPDWORD pdwEffect)
{
target_drag_context *ctx = (target_drag_context *) This;
GDK_NOTE (DND, g_print ("idroptarget_drop %p ", This));
if (pDataObj == NULL)
{
GDK_NOTE (DND, g_print ("E_POINTER\n"));
return E_POINTER;
}
dnd_data = pDataObj;
ctx->context->suggested_action = get_suggested_action (grfKeyState);
dnd_event_put (GDK_DROP_START, ctx->context, pt, TRUE);
process_pending_events ();
dnd_data = NULL;
/* Notify OLE of copy or move */
if (_dnd_target_state != GDK_WIN32_DND_DROPPED)
*pdwEffect = DROPEFFECT_NONE;
else
*pdwEffect = drop_effect_for_action (ctx->context->action);
GDK_NOTE (DND, g_print ("S_OK\n"));
return S_OK;
}
static ULONG STDMETHODCALLTYPE
idropsource_addref (LPDROPSOURCE This)
{
source_drag_context *ctx = (source_drag_context *) This;
GdkDragContextPrivateWin32 *private = PRIVATE_DATA (ctx->context);
int ref_count = ++private->ref_count;
GDK_NOTE (DND, g_print ("idropsource_addref %p %d\n", This, ref_count));
g_object_ref (G_OBJECT (ctx->context));
return ref_count;
}
static HRESULT STDMETHODCALLTYPE
idropsource_queryinterface (LPDROPSOURCE This,
REFIID riid,
LPVOID *ppvObject)
{
GDK_NOTE (DND, {
g_print ("idropsource_queryinterface %p ", This);
PRINT_GUID (riid);
});
*ppvObject = NULL;
if (IsEqualGUID (riid, &IID_IUnknown))
{
GDK_NOTE (DND, g_print ("...IUnknown S_OK\n"));
idropsource_addref (This);
*ppvObject = This;
return S_OK;
}
else if (IsEqualGUID (riid, &IID_IDropSource))
{
GDK_NOTE (DND, g_print ("...IDropSource S_OK\n"));
idropsource_addref (This);
*ppvObject = This;
return S_OK;
}
else
{
GDK_NOTE (DND, g_print ("...E_NOINTERFACE\n"));
return E_NOINTERFACE;
}
}
static ULONG STDMETHODCALLTYPE
idropsource_release (LPDROPSOURCE This)
{
source_drag_context *ctx = (source_drag_context *) This;
GdkDragContextPrivateWin32 *private = PRIVATE_DATA (ctx->context);
int ref_count = --private->ref_count;
GDK_NOTE (DND, g_print ("idropsource_release %p %d\n", This, ref_count));
if (!private->being_finalized)
g_object_unref (G_OBJECT (ctx->context));
if (ref_count == 0)
g_free (This);
return ref_count;
}
/* Emit GDK events for any changes in mouse events or control key
* state since the last recorded state. Return true if any events
* have been emitted and false otherwise.
*/
static gboolean
send_change_events (GdkDragContext *ctx,
DWORD key_state,
gboolean esc_pressed)
{
GdkDragContextPrivateWin32 *private = PRIVATE_DATA (ctx);
POINT pt;
gboolean changed = FALSE;
HWND hwnd = GDK_WINDOW_HWND (ctx->source_window);
LPARAM lparam;
WPARAM wparam;
if (!API_CALL (GetCursorPos, (&pt)))
return FALSE;
if (!API_CALL (ScreenToClient, (hwnd, &pt)))
return FALSE;
if (pt.x != private->last_pt.x || pt.y != private->last_pt.y ||
key_state != private->last_key_state)
{
lparam = MAKELPARAM (pt.x, pt.y);
wparam = key_state;
if (pt.x != private->last_pt.x || pt.y != private->last_pt.y)
{
GDK_NOTE (DND, g_print ("Sending WM_MOUSEMOVE (%ld,%ld)\n", pt.x, pt.y));
SendMessage (hwnd, WM_MOUSEMOVE, wparam, lparam);
}
if ((key_state & MK_LBUTTON) != (private->last_key_state & MK_LBUTTON))
{
if (key_state & MK_LBUTTON)
SendMessage (hwnd, WM_LBUTTONDOWN, wparam, lparam);
else
SendMessage (hwnd, WM_LBUTTONUP, wparam, lparam);
}
if ((key_state & MK_MBUTTON) != (private->last_key_state & MK_MBUTTON))
{
if (key_state & MK_MBUTTON)
SendMessage (hwnd, WM_MBUTTONDOWN, wparam, lparam);
else
SendMessage (hwnd, WM_MBUTTONUP, wparam, lparam);
}
if ((key_state & MK_RBUTTON) != (private->last_key_state & MK_RBUTTON))
{
if (key_state & MK_RBUTTON)
SendMessage (hwnd, WM_RBUTTONDOWN, wparam, lparam);
else
SendMessage (hwnd, WM_RBUTTONUP, wparam, lparam);
}
if ((key_state & MK_CONTROL) != (private->last_key_state & MK_CONTROL))
{
if (key_state & MK_CONTROL)
SendMessage (hwnd, WM_KEYDOWN, VK_CONTROL, 0);
else
SendMessage (hwnd, WM_KEYUP, VK_CONTROL, 0);
}
if ((key_state & MK_SHIFT) != (private->last_key_state & MK_SHIFT))
{
if (key_state & MK_CONTROL)
SendMessage (hwnd, WM_KEYDOWN, VK_SHIFT, 0);
else
SendMessage (hwnd, WM_KEYUP, VK_SHIFT, 0);
}
changed = TRUE;
private->last_key_state = key_state;
private->last_pt = pt;
}
if (esc_pressed)
{
GDK_NOTE (DND, g_print ("Sending a escape key down message to %p\n", hwnd));
SendMessage (hwnd, WM_KEYDOWN, VK_ESCAPE, 0);
changed = TRUE;
}
return changed;
}
static HRESULT STDMETHODCALLTYPE
idropsource_querycontinuedrag (LPDROPSOURCE This,
BOOL fEscapePressed,
DWORD grfKeyState)
{
source_drag_context *ctx = (source_drag_context *) This;
GDK_NOTE (DND, g_print ("idropsource_querycontinuedrag %p ", This));
if (send_change_events (ctx->context, grfKeyState, fEscapePressed))
process_pending_events ();
if (_dnd_source_state == GDK_WIN32_DND_DROPPED)
{
GDK_NOTE (DND, g_print ("DRAGDROP_S_DROP\n"));
return DRAGDROP_S_DROP;
}
else if (_dnd_source_state == GDK_WIN32_DND_NONE)
{
GDK_NOTE (DND, g_print ("DRAGDROP_S_CANCEL\n"));
return DRAGDROP_S_CANCEL;
}
else
{
GDK_NOTE (DND, g_print ("S_OK\n"));
return S_OK;
}
}
static HRESULT STDMETHODCALLTYPE
idropsource_givefeedback (LPDROPSOURCE This,
DWORD dwEffect)
{
source_drag_context *ctx = (source_drag_context *) This;
GdkDragAction suggested_action;
GDK_NOTE (DND, g_print ("idropsource_givefeedback %p DRAGDROP_S_USEDEFAULTCURSORS\n", This));
if (dwEffect == DROPEFFECT_MOVE)
suggested_action = GDK_ACTION_MOVE;
else
suggested_action = GDK_ACTION_COPY;
ctx->context->action = suggested_action;
if (dwEffect == DROPEFFECT_NONE)
{
if (ctx->context->dest_window != NULL)
{
g_object_unref (ctx->context->dest_window);
ctx->context->dest_window = NULL;
}
}
else
{
if (ctx->context->dest_window == NULL)
ctx->context->dest_window = g_object_ref (_gdk_root);
}
return DRAGDROP_S_USEDEFAULTCURSORS;
}
static ULONG STDMETHODCALLTYPE
idataobject_addref (LPDATAOBJECT This)
{
data_object *dobj = (data_object *) This;
int ref_count = ++dobj->ref_count;
GDK_NOTE (DND, g_print ("idataobject_addref %p %d\n", This, ref_count));
return ref_count;
}
static HRESULT STDMETHODCALLTYPE
idataobject_queryinterface (LPDATAOBJECT This,
REFIID riid,
LPVOID *ppvObject)
{
GDK_NOTE (DND, {
g_print ("idataobject_queryinterface %p ", This);
PRINT_GUID (riid);
});
*ppvObject = NULL;
if (IsEqualGUID (riid, &IID_IUnknown))
{
GDK_NOTE (DND, g_print ("...IUnknown S_OK\n"));
idataobject_addref (This);
*ppvObject = This;
return S_OK;
}
else if (IsEqualGUID (riid, &IID_IDataObject))
{
GDK_NOTE (DND, g_print ("...IDataObject S_OK\n"));
idataobject_addref (This);
*ppvObject = This;
return S_OK;
}
else
{
GDK_NOTE (DND, g_print ("...E_NOINTERFACE\n"));
return E_NOINTERFACE;
}
}
static ULONG STDMETHODCALLTYPE
idataobject_release (LPDATAOBJECT This)
{
data_object *dobj = (data_object *) This;
int ref_count = --dobj->ref_count;
GDK_NOTE (DND, g_print ("idataobject_release %p %d\n", This, ref_count));
if (ref_count == 0)
g_free (This);
return ref_count;
}
static HRESULT
query (LPDATAOBJECT This,
LPFORMATETC pFormatEtc)
{
int i;
if (!pFormatEtc)
return DV_E_FORMATETC;
if (pFormatEtc->lindex != -1)
return DV_E_LINDEX;
if ((pFormatEtc->tymed & TYMED_HGLOBAL) == 0)
return DV_E_TYMED;
if ((pFormatEtc->dwAspect & DVASPECT_CONTENT) == 0)
return DV_E_DVASPECT;
for (i = 0; i < nformats; i++)
if (pFormatEtc->cfFormat == formats[i].cfFormat)
return S_OK;
return DV_E_FORMATETC;
}
static FORMATETC *active_pFormatEtc = NULL;
static STGMEDIUM *active_pMedium = NULL;
static HRESULT STDMETHODCALLTYPE
idataobject_getdata (LPDATAOBJECT This,
LPFORMATETC pFormatEtc,
LPSTGMEDIUM pMedium)
{
data_object *ctx = (data_object *) This;
GdkAtom target;
HRESULT hr;
GdkEvent e;
GDK_NOTE (DND, g_print ("idataobject_getdata %p %s ",
This, _gdk_win32_cf_to_string (pFormatEtc->cfFormat)));
/* Check whether we can provide requested format */
hr = query (This, pFormatEtc);
if (hr != S_OK)
return hr;
/* Append a GDK_SELECTION_GET event and then hope the app sets the
* property associated with the _gdk_ole2_dnd atom
*/
active_pFormatEtc = pFormatEtc;
active_pMedium = pMedium;
target = GDK_TARGET_STRING;
e.type = GDK_SELECTION_REQUEST;
e.selection.window = ctx->context->source_window;
e.selection.send_event = FALSE; /* ??? */
/* FIXME: Should really both selection and property be _gdk_ole2_dnd? */
e.selection.selection = _gdk_ole2_dnd;
/* FIXME: Target? */
e.selection.target = _utf8_string;
e.selection.property = _gdk_ole2_dnd;
e.selection.time = GDK_CURRENT_TIME;
g_object_ref (e.selection.window);
GDK_NOTE (EVENTS, _gdk_win32_print_event (&e));
gdk_event_put (&e);
process_pending_events ();
active_pFormatEtc = NULL;
active_pMedium = NULL;
if (pMedium->hGlobal == NULL) {
return E_UNEXPECTED;
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
idataobject_getdatahere (LPDATAOBJECT This,
LPFORMATETC pFormatEtc,
LPSTGMEDIUM pMedium)
{
GDK_NOTE (DND, g_print ("idataobject_getdatahere %p %s E_UNEXPECTED\n",
This, _gdk_win32_cf_to_string (pFormatEtc->cfFormat)));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idataobject_querygetdata (LPDATAOBJECT This,
LPFORMATETC pFormatEtc)
{
HRESULT hr;
hr = query (This, pFormatEtc);
#define CASE(x) case x: g_print (#x)
GDK_NOTE (DND, {
g_print ("idataobject_querygetdata %p %s \n",
This, _gdk_win32_cf_to_string (pFormatEtc->cfFormat));
switch (hr)
{
CASE (DV_E_FORMATETC);
CASE (DV_E_LINDEX);
CASE (DV_E_TYMED);
CASE (DV_E_DVASPECT);
CASE (S_OK);
default: g_print ("%#lx", hr);
}
});
return hr;
}
static HRESULT STDMETHODCALLTYPE
idataobject_getcanonicalformatetc (LPDATAOBJECT This,
LPFORMATETC pFormatEtcIn,
LPFORMATETC pFormatEtcOut)
{
GDK_NOTE (DND, g_print ("idataobject_getcanonicalformatetc %p E_UNEXPECTED\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idataobject_setdata (LPDATAOBJECT This,
LPFORMATETC pFormatEtc,
LPSTGMEDIUM pMedium,
BOOL fRelease)
{
GDK_NOTE (DND, g_print ("idataobject_setdata %p %s E_UNEXPECTED\n",
This, _gdk_win32_cf_to_string (pFormatEtc->cfFormat)));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idataobject_enumformatetc (LPDATAOBJECT This,
DWORD dwDirection,
LPENUMFORMATETC *ppEnumFormatEtc)
{
GDK_NOTE (DND, g_print ("idataobject_enumformatetc %p ", This));
if (dwDirection != DATADIR_GET)
{
GDK_NOTE (DND, g_print ("E_NOTIMPL\n"));
return E_NOTIMPL;
}
*ppEnumFormatEtc = &enum_formats_new ()->ief;
GDK_NOTE (DND, g_print ("%p S_OK\n", *ppEnumFormatEtc));
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
idataobject_dadvise (LPDATAOBJECT This,
LPFORMATETC pFormatetc,
DWORD advf,
LPADVISESINK pAdvSink,
DWORD *pdwConnection)
{
GDK_NOTE (DND, g_print ("idataobject_dadvise %p E_NOTIMPL\n", This));
return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE
idataobject_dunadvise (LPDATAOBJECT This,
DWORD dwConnection)
{
GDK_NOTE (DND, g_print ("idataobject_dunadvise %p E_NOTIMPL\n", This));
return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE
idataobject_enumdadvise (LPDATAOBJECT This,
LPENUMSTATDATA *ppenumAdvise)
{
GDK_NOTE (DND, g_print ("idataobject_enumdadvise %p OLE_E_ADVISENOTSUPPORTED\n", This));
return OLE_E_ADVISENOTSUPPORTED;
}
static ULONG STDMETHODCALLTYPE
ienumformatetc_addref (LPENUMFORMATETC This)
{
enum_formats *en = (enum_formats *) This;
int ref_count = ++en->ref_count;
GDK_NOTE (DND, g_print ("ienumformatetc_addref %p %d\n", This, ref_count));
return ref_count;
}
static HRESULT STDMETHODCALLTYPE
ienumformatetc_queryinterface (LPENUMFORMATETC This,
REFIID riid,
LPVOID *ppvObject)
{
GDK_NOTE (DND, {
g_print ("ienumformatetc_queryinterface %p", This);
PRINT_GUID (riid);
});
*ppvObject = NULL;
if (IsEqualGUID (riid, &IID_IUnknown))
{
GDK_NOTE (DND, g_print ("...IUnknown S_OK\n"));
ienumformatetc_addref (This);
*ppvObject = This;
return S_OK;
}
else if (IsEqualGUID (riid, &IID_IEnumFORMATETC))
{
GDK_NOTE (DND, g_print ("...IEnumFORMATETC S_OK\n"));
ienumformatetc_addref (This);
*ppvObject = This;
return S_OK;
}
else
{
GDK_NOTE (DND, g_print ("...E_NOINTERFACE\n"));
return E_NOINTERFACE;
}
}
static ULONG STDMETHODCALLTYPE
ienumformatetc_release (LPENUMFORMATETC This)
{
enum_formats *en = (enum_formats *) This;
int ref_count = --en->ref_count;
GDK_NOTE (DND, g_print ("ienumformatetc_release %p %d\n", This, ref_count));
if (ref_count == 0)
g_free (This);
return ref_count;
}
static HRESULT STDMETHODCALLTYPE
ienumformatetc_next (LPENUMFORMATETC This,
ULONG celt,
LPFORMATETC elts,
ULONG *nelt)
{
enum_formats *en = (enum_formats *) This;
int i, n;
GDK_NOTE (DND, g_print ("ienumformatetc_next %p %d %ld ", This, en->ix, celt));
n = 0;
for (i = 0; i < celt; i++)
{
if (en->ix >= nformats)
break;
elts[i] = formats[en->ix++];
n++;
}
if (nelt != NULL)
*nelt = n;
GDK_NOTE (DND, g_print ("%s\n", (n == celt) ? "S_OK" : "S_FALSE"));
if (n == celt)
return S_OK;
else
return S_FALSE;
}
static HRESULT STDMETHODCALLTYPE
ienumformatetc_skip (LPENUMFORMATETC This,
ULONG celt)
{
enum_formats *en = (enum_formats *) This;
GDK_NOTE (DND, g_print ("ienumformatetc_skip %p %d %ld S_OK\n", This, en->ix, celt));
en->ix += celt;
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
ienumformatetc_reset (LPENUMFORMATETC This)
{
enum_formats *en = (enum_formats *) This;
GDK_NOTE (DND, g_print ("ienumformatetc_reset %p S_OK\n", This));
en->ix = 0;
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
ienumformatetc_clone (LPENUMFORMATETC This,
LPENUMFORMATETC *ppEnumFormatEtc)
{
enum_formats *en = (enum_formats *) This;
enum_formats *new;
GDK_NOTE (DND, g_print ("ienumformatetc_clone %p S_OK\n", This));
new = enum_formats_new ();
new->ix = en->ix;
*ppEnumFormatEtc = &new->ief;
return S_OK;
}
static IDropTargetVtbl idt_vtbl = {
idroptarget_queryinterface,
idroptarget_addref,
idroptarget_release,
idroptarget_dragenter,
idroptarget_dragover,
idroptarget_dragleave,
idroptarget_drop
};
static IDropSourceVtbl ids_vtbl = {
idropsource_queryinterface,
idropsource_addref,
idropsource_release,
idropsource_querycontinuedrag,
idropsource_givefeedback
};
static IDataObjectVtbl ido_vtbl = {
idataobject_queryinterface,
idataobject_addref,
idataobject_release,
idataobject_getdata,
idataobject_getdatahere,
idataobject_querygetdata,
idataobject_getcanonicalformatetc,
idataobject_setdata,
idataobject_enumformatetc,
idataobject_dadvise,
idataobject_dunadvise,
idataobject_enumdadvise
};
static IEnumFORMATETCVtbl ief_vtbl = {
ienumformatetc_queryinterface,
ienumformatetc_addref,
ienumformatetc_release,
ienumformatetc_next,
ienumformatetc_skip,
ienumformatetc_reset,
ienumformatetc_clone
};
static target_drag_context *
target_context_new (GdkWindow *window)
{
target_drag_context *result;
GdkDragContextPrivateWin32 *private;
GdkDevice *device;
GdkDeviceManager *device_manager;
result = g_new0 (target_drag_context, 1);
result->idt.lpVtbl = &idt_vtbl;
result->context = gdk_drag_context_new ();
result->context->protocol = GDK_DRAG_PROTO_OLE2;
result->context->is_source = FALSE;
device_manager = gdk_display_get_device_manager (_gdk_display);
device = gdk_device_manager_get_client_pointer (device_manager);
gdk_drag_context_set_device (result->context, device);
result->context->source_window = NULL;
result->context->dest_window = window;
g_object_ref (window);
/* FIXME: result->context->targets? */
result->context->actions = GDK_ACTION_DEFAULT | GDK_ACTION_COPY | GDK_ACTION_MOVE;
result->context->suggested_action = GDK_ACTION_MOVE;
result->context->action = GDK_ACTION_MOVE;
private = PRIVATE_DATA(result->context);
private->iface = (IUnknown *) &result->idt;
idroptarget_addref (&result->idt);
GDK_NOTE (DND, g_print ("target_context_new: %p\n", result));
return result;
}
static source_drag_context *
source_context_new (GdkWindow *window,
GList *targets)
{
source_drag_context *result;
GdkDragContextPrivateWin32 *private;
GdkDevice *device;
GdkDeviceManager *device_manager;
result = g_new0 (source_drag_context, 1);
result->ids.lpVtbl = &ids_vtbl;
result->context = gdk_drag_context_new ();
result->context->protocol = GDK_DRAG_PROTO_OLE2;
result->context->is_source = TRUE;
device_manager = gdk_display_get_device_manager (_gdk_display);
device = gdk_device_manager_get_client_pointer (device_manager);
gdk_drag_context_set_device (result->context, device);
result->context->source_window = window;
g_object_ref (window);
result->context->dest_window = NULL;
result->context->targets = g_list_copy (targets);
private = PRIVATE_DATA(result->context);
private->iface = (IUnknown *) &result->ids;
idropsource_addref (&result->ids);
GDK_NOTE (DND, g_print ("source_context_new: %p\n", result));
return result;
}
static data_object *
data_object_new (GdkDragContext *context)
{
data_object *result;
result = g_new0 (data_object, 1);
result->ido.lpVtbl = &ido_vtbl;
result->ref_count = 1;
result->context = context;
GDK_NOTE (DND, g_print ("data_object_new: %p\n", result));
return result;
}
static enum_formats *
enum_formats_new (void)
{
enum_formats *result;
result = g_new0 (enum_formats, 1);
result->ief.lpVtbl = &ief_vtbl;
result->ref_count = 1;
result->ix = 0;
return result;
}
void
_gdk_win32_ole2_dnd_property_change (GdkAtom type,
gint format,
const guchar *data,
gint nelements)
{
if (use_ole2_dnd)
{
HGLOBAL hdata = NULL;
if (active_pFormatEtc == NULL || active_pMedium == NULL)
return;
/* Set up the data buffer for wide character text request */
if (active_pFormatEtc->cfFormat == CF_UNICODETEXT)
{
gunichar2 *wdata;
glong wlen;
wdata = g_utf8_to_utf16 ((const char *) data, -1, NULL, &wlen, NULL);
hdata = GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT, (wlen + 1) * 2);
if (hdata)
{
wchar_t *ptr = (wchar_t *) GlobalLock(hdata);
memcpy (ptr, wdata, (wlen + 1) * 2);
GlobalUnlock(hdata);
}
g_free (wdata);
}
else
g_warning ("Only text handled for now");
/* Pack up data */
active_pMedium->tymed = TYMED_HGLOBAL;
active_pMedium->hGlobal = hdata;
active_pMedium->pUnkForRelease = 0;
}
}
/* From MS Knowledge Base article Q130698 */
static gboolean
resolve_link (HWND hWnd,
wchar_t *link,
gchar **lpszPath)
{
WIN32_FILE_ATTRIBUTE_DATA wfad;
HRESULT hr;
IShellLinkW *pslW = NULL;
IPersistFile *ppf = NULL;
/* Check if the file is empty first because IShellLink::Resolve for
* some reason succeeds with an empty file and returns an empty
* "link target". (#524151)
*/
if (!GetFileAttributesExW (link, GetFileExInfoStandard, &wfad) ||
(wfad.nFileSizeHigh == 0 && wfad.nFileSizeLow == 0))
return FALSE;
/* Assume failure to start with: */
*lpszPath = 0;
/* Call CoCreateInstance to obtain the IShellLink interface
* pointer. This call fails if CoInitialize is not called, so it is
* assumed that CoInitialize has been called.
*/
hr = CoCreateInstance (&CLSID_ShellLink,
NULL,
CLSCTX_INPROC_SERVER,
&IID_IShellLinkW,
(LPVOID *)&pslW);
if (SUCCEEDED (hr))
{
/* The IShellLink interface supports the IPersistFile
* interface. Get an interface pointer to it.
*/
hr = pslW->lpVtbl->QueryInterface (pslW,
&IID_IPersistFile,
(LPVOID *) &ppf);
}
if (SUCCEEDED (hr))
{
/* Load the file. */
hr = ppf->lpVtbl->Load (ppf, link, STGM_READ);
}
if (SUCCEEDED (hr))
{
/* Resolve the link by calling the Resolve()
* interface function.
*/
hr = pslW->lpVtbl->Resolve (pslW, hWnd, SLR_ANY_MATCH | SLR_NO_UI);
}
if (SUCCEEDED (hr))
{
wchar_t wtarget[MAX_PATH];
hr = pslW->lpVtbl->GetPath (pslW, wtarget, MAX_PATH, NULL, 0);
if (SUCCEEDED (hr))
*lpszPath = g_utf16_to_utf8 (wtarget, -1, NULL, NULL, NULL);
}
if (ppf)
ppf->lpVtbl->Release (ppf);
if (pslW)
pslW->lpVtbl->Release (pslW);
return SUCCEEDED (hr);
}
#if 0
/* Check for filenames like C:\Users\tml\AppData\Local\Temp\d5qtkvvs.bmp */
static gboolean
filename_looks_tempish (const char *filename)
{
char *dirname;
char *p;
const char *q;
gboolean retval = FALSE;
dirname = g_path_get_dirname (filename);
p = dirname;
q = g_get_tmp_dir ();
while (*p && *q &&
((G_IS_DIR_SEPARATOR (*p) && G_IS_DIR_SEPARATOR (*q)) ||
g_ascii_tolower (*p) == g_ascii_tolower (*q)))
p++, q++;
if (!*p && !*q)
retval = TRUE;
g_free (dirname);
return retval;
}
static gboolean
close_it (gpointer data)
{
close (GPOINTER_TO_INT (data));
return FALSE;
}
#endif
static GdkFilterReturn
gdk_dropfiles_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
GdkDragContext *context;
GString *result;
MSG *msg = (MSG *) xev;
HANDLE hdrop;
POINT pt;
gint nfiles, i;
gchar *fileName, *linkedFile;
GdkDevice *device;
GdkDeviceManager *device_manager;
if (msg->message == WM_DROPFILES)
{
GDK_NOTE (DND, g_print ("WM_DROPFILES: %p\n", msg->hwnd));
context = gdk_drag_context_new ();
context->protocol = GDK_DRAG_PROTO_WIN32_DROPFILES;
context->is_source = FALSE;
device_manager = gdk_display_get_device_manager (_gdk_display);
device = gdk_device_manager_get_client_pointer (device_manager);
gdk_drag_context_set_device (context, device);
context->source_window = _gdk_root;
g_object_ref (context->source_window);
context->dest_window = event->any.window;
g_object_ref (context->dest_window);
/* WM_DROPFILES drops are always file names */
context->targets =
g_list_append (NULL, _text_uri_list);
context->actions = GDK_ACTION_COPY;
context->suggested_action = GDK_ACTION_COPY;
current_dest_drag = context;
event->dnd.type = GDK_DROP_START;
event->dnd.context = current_dest_drag;
gdk_event_set_device (event, gdk_drag_context_get_device (current_dest_drag));
hdrop = (HANDLE) msg->wParam;
DragQueryPoint (hdrop, &pt);
ClientToScreen (msg->hwnd, &pt);
event->dnd.x_root = pt.x + _gdk_offset_x;
event->dnd.y_root = pt.y + _gdk_offset_y;
event->dnd.time = _gdk_win32_get_next_tick (msg->time);
nfiles = DragQueryFile (hdrop, 0xFFFFFFFF, NULL, 0);
result = g_string_new (NULL);
for (i = 0; i < nfiles; i++)
{
gchar *uri;
wchar_t wfn[MAX_PATH];
DragQueryFileW (hdrop, i, wfn, MAX_PATH);
fileName = g_utf16_to_utf8 (wfn, -1, NULL, NULL, NULL);
/* Resolve shortcuts */
if (resolve_link (msg->hwnd, wfn, &linkedFile))
{
uri = g_filename_to_uri (linkedFile, NULL, NULL);
if (uri != NULL)
{
g_string_append (result, uri);
GDK_NOTE (DND, g_print ("... %s link to %s: %s\n",
fileName, linkedFile, uri));
g_free (uri);
}
g_free (fileName);
fileName = linkedFile;
}
else
{
uri = g_filename_to_uri (fileName, NULL, NULL);
if (uri != NULL)
{
g_string_append (result, uri);
GDK_NOTE (DND, g_print ("... %s: %s\n", fileName, uri));
g_free (uri);
}
}
#if 0
/* Awful hack to recognize temp files corresponding to
* images dragged from Firefox... Open the file right here
* so that it is less likely that Firefox manages to delete
* it before the GTK+-using app (typically GIMP) has opened
* it.
*
* Not compiled in for now, because it means images dragged
* from Firefox would stay around in the temp folder which
* is not what Firefox intended. I don't feel comfortable
* with that, both from a geenral sanity point of view, and
* from a privacy point of view. It's better to wait for
* Firefox to fix the problem, for instance by deleting the
* temp file after a longer delay, or to wait until we
* implement the OLE2_DND...
*/
if (filename_looks_tempish (fileName))
{
int fd = g_open (fileName, _O_RDONLY|_O_BINARY, 0);
if (fd == -1)
{
GDK_NOTE (DND, g_print ("Could not open %s, maybe an image dragged from Firefox that it already deleted\n", fileName));
}
else
{
GDK_NOTE (DND, g_print ("Opened %s as %d so that Firefox won't delete it\n", fileName, fd));
g_timeout_add_seconds (1, close_it, GINT_TO_POINTER (fd));
}
}
#endif
g_free (fileName);
g_string_append (result, "\015\012");
}
_gdk_dropfiles_store (result->str);
g_string_free (result, FALSE);
DragFinish (hdrop);
return GDK_FILTER_TRANSLATE;
}
else
return GDK_FILTER_CONTINUE;
}
static void
add_format (GArray *fmts,
CLIPFORMAT cf)
{
FORMATETC fmt;
fmt.cfFormat = cf;
fmt.ptd = NULL;
fmt.dwAspect = DVASPECT_CONTENT;
fmt.lindex = -1;
fmt.tymed = TYMED_HGLOBAL;
g_array_append_val (fmts, fmt);
}
void
_gdk_dnd_init (void)
{
if (getenv ("GDK_WIN32_USE_EXPERIMENTAL_OLE2_DND"))
use_ole2_dnd = TRUE;
if (use_ole2_dnd)
{
HRESULT hr;
GArray *fmts;
hr = OleInitialize (NULL);
if (! SUCCEEDED (hr))
g_error ("OleInitialize failed");
fmts = g_array_new (FALSE, FALSE, sizeof (FORMATETC));
/* The most important presumably */
add_format (fmts, CF_UNICODETEXT);
/* Used for GTK+ internal DND, I think was the intent? Anyway, code below assumes
* this is at index 1.
*/
add_format (fmts, CF_GDIOBJFIRST);
add_format (fmts, CF_HDROP);
add_format (fmts, _cf_png);
add_format (fmts, CF_DIB);
add_format (fmts, _cf_url);
add_format (fmts, _cf_html_format);
add_format (fmts, _cf_text_html);
nformats = fmts->len;
formats = (FORMATETC*) g_array_free (fmts, FALSE);
target_ctx_for_window = g_hash_table_new (g_direct_hash, g_direct_equal);
}
}
void
_gdk_win32_dnd_exit (void)
{
if (use_ole2_dnd)
{
OleUninitialize ();
}
}
/* Source side */
static void
local_send_leave (GdkDragContext *context,
guint32 time)
{
GdkEvent *tmp_event;
GDK_NOTE (DND, g_print ("local_send_leave: context=%p current_dest_drag=%p\n",
context,
current_dest_drag));
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_LOCAL) &&
(current_dest_drag->source_window == context->source_window))
{
tmp_event = gdk_event_new (GDK_DRAG_LEAVE);
tmp_event->dnd.window = g_object_ref (context->dest_window);
/* Pass ownership of context to the event */
tmp_event->dnd.send_event = FALSE;
tmp_event->dnd.context = g_object_ref (current_dest_drag);
tmp_event->dnd.time = GDK_CURRENT_TIME; /* FIXME? */
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (context));
current_dest_drag = NULL;
GDK_NOTE (EVENTS, _gdk_win32_print_event (tmp_event));
gdk_event_put (tmp_event);
gdk_event_free (tmp_event);
}
}
static void
local_send_enter (GdkDragContext *context,
guint32 time)
{
GdkEvent *tmp_event;
GdkDragContextPrivateWin32 *private;
GdkDragContext *new_context;
GdkDevice *device;
GdkDeviceManager *device_manager;
GDK_NOTE (DND, g_print ("local_send_enter: context=%p current_dest_drag=%p\n",
context,
current_dest_drag));
private = PRIVATE_DATA (context);
if (current_dest_drag != NULL)
{
g_object_unref (G_OBJECT (current_dest_drag));
current_dest_drag = NULL;
}
new_context = gdk_drag_context_new ();
new_context->protocol = GDK_DRAG_PROTO_LOCAL;
new_context->is_source = FALSE;
device_manager = gdk_display_get_device_manager (_gdk_display);
device = gdk_device_manager_get_client_pointer (device_manager);
gdk_drag_context_set_device (new_context, device);
new_context->source_window = context->source_window;
g_object_ref (new_context->source_window);
new_context->dest_window = context->dest_window;
g_object_ref (new_context->dest_window);
new_context->targets = g_list_copy (context->targets);
gdk_window_set_events (new_context->source_window,
gdk_window_get_events (new_context->source_window) |
GDK_PROPERTY_CHANGE_MASK);
new_context->actions = context->actions;
tmp_event = gdk_event_new (GDK_DRAG_ENTER);
tmp_event->dnd.window = g_object_ref (context->dest_window);
tmp_event->dnd.send_event = FALSE;
tmp_event->dnd.context = g_object_ref (new_context);
tmp_event->dnd.time = GDK_CURRENT_TIME; /* FIXME? */
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (context));
current_dest_drag = new_context;
GDK_NOTE (EVENTS, _gdk_win32_print_event (tmp_event));
gdk_event_put (tmp_event);
gdk_event_free (tmp_event);
}
static void
local_send_motion (GdkDragContext *context,
gint x_root,
gint y_root,
GdkDragAction action,
guint32 time)
{
GdkEvent *tmp_event;
GDK_NOTE (DND, g_print ("local_send_motion: context=%p (%d,%d) current_dest_drag=%p\n",
context, x_root, y_root,
current_dest_drag));
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_LOCAL) &&
(current_dest_drag->source_window == context->source_window))
{
tmp_event = gdk_event_new (GDK_DRAG_MOTION);
tmp_event->dnd.window = g_object_ref (current_dest_drag->dest_window);
tmp_event->dnd.send_event = FALSE;
tmp_event->dnd.context = g_object_ref (current_dest_drag);
tmp_event->dnd.time = time;
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (current_dest_drag));
current_dest_drag->suggested_action = action;
tmp_event->dnd.x_root = x_root;
tmp_event->dnd.y_root = y_root;
PRIVATE_DATA (current_dest_drag)->last_pt.x = x_root - _gdk_offset_x;
PRIVATE_DATA (current_dest_drag)->last_pt.y = y_root - _gdk_offset_y;
PRIVATE_DATA (context)->drag_status = GDK_DRAG_STATUS_MOTION_WAIT;
GDK_NOTE (EVENTS, _gdk_win32_print_event (tmp_event));
gdk_event_put (tmp_event);
gdk_event_free (tmp_event);
}
}
static void
local_send_drop (GdkDragContext *context,
guint32 time)
{
GdkEvent *tmp_event;
GDK_NOTE (DND, g_print ("local_send_drop: context=%p current_dest_drag=%p\n",
context,
current_dest_drag));
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_LOCAL) &&
(current_dest_drag->source_window == context->source_window))
{
GdkDragContextPrivateWin32 *private;
private = PRIVATE_DATA (current_dest_drag);
/* Pass ownership of context to the event */
tmp_event = gdk_event_new (GDK_DROP_START);
tmp_event->dnd.window = g_object_ref (current_dest_drag->dest_window);
tmp_event->dnd.send_event = FALSE;
tmp_event->dnd.context = g_object_ref (current_dest_drag);
tmp_event->dnd.time = GDK_CURRENT_TIME;
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (current_dest_drag));
tmp_event->dnd.x_root = private->last_pt.x + _gdk_offset_x;
tmp_event->dnd.y_root = private->last_pt.y + _gdk_offset_y;
current_dest_drag = NULL;
GDK_NOTE (EVENTS, _gdk_win32_print_event (tmp_event));
gdk_event_put (tmp_event);
gdk_event_free (tmp_event);
}
}
static void
gdk_drag_do_leave (GdkDragContext *context,
guint32 time)
{
if (context->dest_window)
{
GDK_NOTE (DND, g_print ("gdk_drag_do_leave\n"));
if (!use_ole2_dnd)
{
if (context->protocol == GDK_DRAG_PROTO_LOCAL)
local_send_leave (context, time);
}
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
GdkDragContext *
_gdk_win32_window_drag_begin (GdkWindow *window,
GdkDevice *device,
GList *targets)
{
if (!use_ole2_dnd)
{
GdkDragContext *new_context;
GdkDevice *device;
GdkDeviceManager *device_manager;
g_return_val_if_fail (window != NULL, NULL);
new_context = gdk_drag_context_new ();
device_manager = gdk_display_get_device_manager (_gdk_display);
device = gdk_device_manager_get_client_pointer (device_manager);
gdk_drag_context_set_device (new_context, device);
new_context->is_source = TRUE;
new_context->source_window = window;
g_object_ref (window);
gdk_drag_context_set_device (new_context, device);
new_context->targets = g_list_copy (targets);
new_context->actions = 0;
return new_context;
}
else
{
source_drag_context *ctx;
g_return_val_if_fail (window != NULL, NULL);
GDK_NOTE (DND, g_print ("gdk_drag_begin\n"));
ctx = source_context_new (window, targets);
_dnd_source_state = GDK_WIN32_DND_PENDING;
pending_src_context = ctx;
g_object_ref (ctx->context);
return ctx->context;
}
}
void
_gdk_win32_dnd_do_dragdrop (void)
{
if (use_ole2_dnd)
{
GdkDragContext* drag_ctx;
GdkDragContextPrivateWin32 *private;
BYTE kbd_state[256];
data_object *dobj;
HRESULT hr;
DWORD dwEffect;
#if 0
HGLOBAL global;
STGMEDIUM medium;
#endif
if (pending_src_context == NULL)
return;
drag_ctx = pending_src_context->context;
private = PRIVATE_DATA (drag_ctx);
dobj = data_object_new (drag_ctx);
API_CALL (GetCursorPos, (&private->last_pt));
API_CALL (ScreenToClient, (GDK_WINDOW_HWND (drag_ctx->source_window), &private->last_pt));
private->last_key_state = 0;
API_CALL (GetKeyboardState, (kbd_state));
if (kbd_state[VK_CONTROL])
private->last_key_state |= MK_CONTROL;
if (kbd_state[VK_SHIFT])
private->last_key_state |= MK_SHIFT;
if (kbd_state[VK_LBUTTON])
private->last_key_state |= MK_LBUTTON;
if (kbd_state[VK_MBUTTON])
private->last_key_state |= MK_MBUTTON;
if (kbd_state[VK_RBUTTON])
private->last_key_state |= MK_RBUTTON;
#if 0
global = GlobalAlloc (GMEM_FIXED, sizeof (ctx));
memcpy (&global, ctx, sizeof (ctx));
medium.tymed = TYMED_HGLOBAL;
medium.hGlobal = global;
medium.pUnkForRelease = NULL;
/* FIXME I wish I remember what I was thinking of here, i.e. what
* the formats[1] signifies, i.e. the CF_GDIOBJFIRST FORMATETC?
*/
dobj->ido.lpVtbl->SetData (&dobj->ido, &formats[1], &medium, TRUE);
#endif
/* Start dragging with mainloop inside the OLE2 API. Exits only when done */
GDK_NOTE (DND, g_print ("Calling DoDragDrop\n"));
_gdk_win32_begin_modal_call ();
hr = DoDragDrop (&dobj->ido, &pending_src_context->ids,
DROPEFFECT_COPY | DROPEFFECT_MOVE,
&dwEffect);
_gdk_win32_end_modal_call ();
GDK_NOTE (DND, g_print ("DoDragDrop returned %s\n",
(hr == DRAGDROP_S_DROP ? "DRAGDROP_S_DROP" :
(hr == DRAGDROP_S_CANCEL ? "DRAGDROP_S_CANCEL" :
(hr == E_UNEXPECTED ? "E_UNEXPECTED" :
g_strdup_printf ("%#.8lx", hr))))));
/* Delete dnd selection after successful move */
if (hr == DRAGDROP_S_DROP && dwEffect == DROPEFFECT_MOVE)
{
GdkEvent tmp_event;
tmp_event.type = GDK_SELECTION_REQUEST;
tmp_event.selection.window = drag_ctx->source_window;
tmp_event.selection.send_event = FALSE;
tmp_event.selection.selection = _gdk_ole2_dnd;
tmp_event.selection.target = _delete;
tmp_event.selection.property = _gdk_ole2_dnd; /* ??? */
tmp_event.selection.time = GDK_CURRENT_TIME; /* ??? */
g_object_ref (tmp_event.selection.window);
GDK_NOTE (EVENTS, _gdk_win32_print_event (&tmp_event));
gdk_event_put (&tmp_event);
}
#if 0
// Send a GDK_DROP_FINISHED to the source window
GetCursorPos (&pt);
ptl.x = pt.x;
ptl.y = pt.y;
if ( pending_src_context != NULL && pending_src_context->context != NULL
&& pending_src_context->context->source_window != NULL )
push_dnd_event (GDK_DROP_FINISHED, pending_src_context->context, ptl, FALSE);
#endif
dobj->ido.lpVtbl->Release (&dobj->ido);
if (pending_src_context != NULL)
{
pending_src_context->ids.lpVtbl->Release (&pending_src_context->ids);
pending_src_context = NULL;
}
}
}
/* Untested, may not work ...
* ... but as of this writing is only used by exlusive X11 gtksocket.c
*/
GdkDragProtocol
_gdk_win32_window_get_drag_protocol (GdkWindow *window,
GdkWindow **target)
{
GdkDragProtocol protocol = GDK_DRAG_PROTO_NONE;
if (gdk_window_get_window_type (window) != GDK_WINDOW_FOREIGN)
{
if (g_object_get_data (G_OBJECT (window), "gdk-dnd-registered") != NULL)
{
if (use_ole2_dnd)
protocol = GDK_DRAG_PROTO_OLE2;
else
protocol = GDK_DRAG_PROTO_LOCAL;
}
}
if (target)
{
*target = NULL;
}
return protocol;
}
typedef struct {
gint x;
gint y;
HWND ignore;
HWND result;
} find_window_enum_arg;
static BOOL CALLBACK
find_window_enum_proc (HWND hwnd,
LPARAM lparam)
{
RECT rect;
POINT tl, br;
find_window_enum_arg *a = (find_window_enum_arg *) lparam;
if (hwnd == a->ignore)
return TRUE;
if (!IsWindowVisible (hwnd))
return TRUE;
tl.x = tl.y = 0;
ClientToScreen (hwnd, &tl);
GetClientRect (hwnd, &rect);
br.x = rect.right;
br.y = rect.bottom;
ClientToScreen (hwnd, &br);
if (a->x >= tl.x && a->y >= tl.y && a->x < br.x && a->y < br.y)
{
a->result = hwnd;
return FALSE;
}
else
return TRUE;
}
static GdkWindow *
gdk_win32_drag_context_find_window (GdkDragContext *context,
GdkWindow *drag_window,
GdkScreen *screen,
gint x_root,
gint y_root,
GdkDragProtocol *protocol)
{
GdkWindow *dest_window, *dw;
find_window_enum_arg a;
a.x = x_root - _gdk_offset_x;
a.y = y_root - _gdk_offset_y;
a.ignore = drag_window ? GDK_WINDOW_HWND (drag_window) : NULL;
a.result = NULL;
EnumWindows (find_window_enum_proc, (LPARAM) &a);
if (a.result == NULL)
dest_window = NULL;
else
{
dw = gdk_win32_handle_table_lookup (a.result);
if (dw)
{
dest_window = gdk_window_get_toplevel (dw);
g_object_ref (dest_window);
}
else
dest_window = gdk_win32_window_foreign_new_for_display (_gdk_display, a.result);
if (use_ole2_dnd)
*protocol = GDK_DRAG_PROTO_OLE2;
else if (context->source_window)
*protocol = GDK_DRAG_PROTO_LOCAL;
else
*protocol = GDK_DRAG_PROTO_WIN32_DROPFILES;
}
GDK_NOTE (DND,
g_print ("gdk_drag_find_window: %p %+d%+d: %p: %p %s\n",
(drag_window ? GDK_WINDOW_HWND (drag_window) : NULL),
x_root, y_root,
a.result,
(dest_window ? GDK_WINDOW_HWND (dest_window) : NULL),
_gdk_win32_drag_protocol_to_string (*protocol)));
return dest_window;
}
static gboolean
gdk_win32_drag_context_drag_motion (GdkDragContext *context,
GdkWindow *dest_window,
GdkDragProtocol protocol,
gint x_root,
gint y_root,
GdkDragAction suggested_action,
GdkDragAction possible_actions,
guint32 time)
{
GdkDragContextPrivateWin32 *private;
g_return_val_if_fail (context != NULL, FALSE);
context->actions = possible_actions;
GDK_NOTE (DND, g_print ("gdk_drag_motion: %s suggested=%s, possible=%s\n"
" context=%p:{actions=%s,suggested=%s,action=%s}\n",
_gdk_win32_drag_protocol_to_string (protocol),
_gdk_win32_drag_action_to_string (suggested_action),
_gdk_win32_drag_action_to_string (possible_actions),
context,
_gdk_win32_drag_action_to_string (context->actions),
_gdk_win32_drag_action_to_string (context->suggested_action),
_gdk_win32_drag_action_to_string (context->action)));
private = PRIVATE_DATA (context);
if (!use_ole2_dnd)
{
if (context->dest_window == dest_window)
{
GdkDragContext *dest_context;
dest_context = gdk_drag_context_find (FALSE,
context->source_window,
dest_window);
if (dest_context)
dest_context->actions = context->actions;
context->suggested_action = suggested_action;
}
else
{
GdkEvent *tmp_event;
/* Send a leave to the last destination */
gdk_drag_do_leave (context, time);
private->drag_status = GDK_DRAG_STATUS_DRAG;
/* Check if new destination accepts drags, and which protocol */
if (dest_window)
{
context->dest_window = dest_window;
g_object_ref (context->dest_window);
context->protocol = protocol;
switch (protocol)
{
case GDK_DRAG_PROTO_LOCAL:
local_send_enter (context, time);
break;
default:
break;
}
context->suggested_action = suggested_action;
}
else
{
context->dest_window = NULL;
context->action = 0;
}
/* Push a status event, to let the client know that
* the drag changed
*/
tmp_event = gdk_event_new (GDK_DRAG_STATUS);
tmp_event->dnd.window = g_object_ref (context->source_window);
/* We use this to signal a synthetic status. Perhaps
* we should use an extra field...
*/
tmp_event->dnd.send_event = TRUE;
tmp_event->dnd.context = g_object_ref (context);
tmp_event->dnd.time = time;
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (context));
GDK_NOTE (EVENTS, _gdk_win32_print_event (tmp_event));
gdk_event_put (tmp_event);
gdk_event_free (tmp_event);
}
/* Send a drag-motion event */
private->last_pt.x = x_root - _gdk_offset_x;
private->last_pt.y = y_root - _gdk_offset_y;
if (context->dest_window)
{
if (private->drag_status == GDK_DRAG_STATUS_DRAG)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_LOCAL:
local_send_motion (context, x_root, y_root, suggested_action, time);
break;
case GDK_DRAG_PROTO_NONE:
g_warning ("GDK_DRAG_PROTO_NONE is not valid in gdk_drag_motion()");
break;
default:
break;
}
}
else
{
GDK_NOTE (DND, g_print (" returning TRUE\n"
" context=%p:{actions=%s,suggested=%s,action=%s}\n",
context,
_gdk_win32_drag_action_to_string (context->actions),
_gdk_win32_drag_action_to_string (context->suggested_action),
_gdk_win32_drag_action_to_string (context->action)));
return TRUE;
}
}
}
GDK_NOTE (DND, g_print (" returning FALSE\n"
" context=%p:{actions=%s,suggested=%s,action=%s}\n",
context,
_gdk_win32_drag_action_to_string (context->actions),
_gdk_win32_drag_action_to_string (context->suggested_action),
_gdk_win32_drag_action_to_string (context->action)));
return FALSE;
}
static void
gdk_win32_drag_context_drag_drop (GdkDragContext *context,
guint32 time)
{
g_return_if_fail (context != NULL);
GDK_NOTE (DND, g_print ("gdk_drag_drop\n"));
if (!use_ole2_dnd)
{
if (context->dest_window &&
context->protocol == GDK_DRAG_PROTO_LOCAL)
local_send_drop (context, time);
}
else
{
_dnd_source_state = GDK_WIN32_DND_DROPPED;
}
}
static void
gdk_win32_drag_context_drag_abort (GdkDragContext *context,
guint32 time)
{
g_return_if_fail (context != NULL);
GDK_NOTE (DND, g_print ("gdk_drag_abort\n"));
if (use_ole2_dnd)
_dnd_source_state = GDK_WIN32_DND_NONE;
}
/* Destination side */
static void
gdk_win32_drag_context_drag_status (GdkDragContext *context,
GdkDragAction action,
guint32 time)
{
GdkDragContextPrivateWin32 *private;
GdkDragContext *src_context;
GdkEvent *tmp_event;
g_return_if_fail (context != NULL);
private = PRIVATE_DATA (context);
GDK_NOTE (DND, g_print ("gdk_drag_status: %s\n"
" context=%p:{actions=%s,suggested=%s,action=%s}\n",
_gdk_win32_drag_action_to_string (action),
context,
_gdk_win32_drag_action_to_string (context->actions),
_gdk_win32_drag_action_to_string (context->suggested_action),
_gdk_win32_drag_action_to_string (context->action)));
context->action = action;
if (!use_ole2_dnd)
{
src_context = gdk_drag_context_find (TRUE,
context->source_window,
context->dest_window);
if (src_context)
{
GdkDragContextPrivateWin32 *private = PRIVATE_DATA (src_context);
if (private->drag_status == GDK_DRAG_STATUS_MOTION_WAIT)
private->drag_status = GDK_DRAG_STATUS_DRAG;
tmp_event = gdk_event_new (GDK_DRAG_STATUS);
tmp_event->dnd.window = g_object_ref (context->source_window);
tmp_event->dnd.send_event = FALSE;
tmp_event->dnd.context = g_object_ref (src_context);
tmp_event->dnd.time = GDK_CURRENT_TIME; /* FIXME? */
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (src_context));
if (action == GDK_ACTION_DEFAULT)
action = 0;
src_context->action = action;
GDK_NOTE (EVENTS, _gdk_win32_print_event (tmp_event));
gdk_event_put (tmp_event);
gdk_event_free (tmp_event);
}
}
}
static void
gdk_win32_drag_context_drop_reply (GdkDragContext *context,
gboolean ok,
guint32 time)
{
g_return_if_fail (context != NULL);
GDK_NOTE (DND, g_print ("gdk_drop_reply\n"));
if (!use_ole2_dnd)
if (context->dest_window)
{
if (context->protocol == GDK_DRAG_PROTO_WIN32_DROPFILES)
_gdk_dropfiles_store (NULL);
}
}
static void
gdk_win32_drag_context_drop_finish (GdkDragContext *context,
gboolean success,
guint32 time)
{
GdkDragContextPrivateWin32 *private;
GdkDragContext *src_context;
GdkEvent *tmp_event;
g_return_if_fail (context != NULL);
GDK_NOTE (DND, g_print ("gdk_drop_finish\n"));
private = PRIVATE_DATA (context);
if (!use_ole2_dnd)
{
src_context = gdk_drag_context_find (TRUE,
context->source_window,
context->dest_window);
if (src_context)
{
tmp_event = gdk_event_new (GDK_DROP_FINISHED);
tmp_event->dnd.window = g_object_ref (src_context->source_window);
tmp_event->dnd.send_event = FALSE;
tmp_event->dnd.context = g_object_ref (src_context);
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (src_context));
GDK_NOTE (EVENTS, _gdk_win32_print_event (tmp_event));
gdk_event_put (tmp_event);
gdk_event_free (tmp_event);
}
}
else
{
gdk_drag_do_leave (context, time);
if (success)
_dnd_target_state = GDK_WIN32_DND_DROPPED;
else
_dnd_target_state = GDK_WIN32_DND_FAILED;
}
}
#if 0
static GdkFilterReturn
gdk_destroy_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
MSG *msg = (MSG *) xev;
if (msg->message == WM_DESTROY)
{
IDropTarget *idtp = (IDropTarget *) data;
GDK_NOTE (DND, g_print ("gdk_destroy_filter: WM_DESTROY: %p\n", msg->hwnd));
#if 0
idtp->lpVtbl->Release (idtp);
#endif
RevokeDragDrop (msg->hwnd);
CoLockObjectExternal ((IUnknown*) idtp, FALSE, TRUE);
}
return GDK_FILTER_CONTINUE;
}
#endif
void
_gdk_win32_window_register_dnd (GdkWindow *window)
{
target_drag_context *ctx;
HRESULT hr;
g_return_if_fail (window != NULL);
if (gdk_window_get_window_type (window) == GDK_WINDOW_OFFSCREEN)
return;
if (g_object_get_data (G_OBJECT (window), "gdk-dnd-registered") != NULL)
return;
else
g_object_set_data (G_OBJECT (window), "gdk-dnd-registered", GINT_TO_POINTER (TRUE));
GDK_NOTE (DND, g_print ("gdk_window_register_dnd: %p\n", GDK_WINDOW_HWND (window)));
if (!use_ole2_dnd)
{
/* We always claim to accept dropped files, but in fact we might not,
* of course. This function is called in such a way that it cannot know
* whether the window (widget) in question actually accepts files
* (in gtk, data of type text/uri-list) or not.
*/
gdk_window_add_filter (window, gdk_dropfiles_filter, NULL);
DragAcceptFiles (GDK_WINDOW_HWND (window), TRUE);
}
else
{
/* Return if window is already setup for DND. */
if (g_hash_table_lookup (target_ctx_for_window, GDK_WINDOW_HWND (window)) != NULL)
return;
/* Register for OLE2 d&d : similarly, claim to accept all supported
* data types because we cannot know from here what the window
* actually accepts.
*/
/* FIXME: This of course won't work with user-extensible data types! */
ctx = target_context_new (window);
hr = CoLockObjectExternal ((IUnknown *) &ctx->idt, TRUE, FALSE);
if (!SUCCEEDED (hr))
OTHER_API_FAILED ("CoLockObjectExternal");
else
{
hr = RegisterDragDrop (GDK_WINDOW_HWND (window), &ctx->idt);
if (hr == DRAGDROP_E_ALREADYREGISTERED)
{
g_print ("DRAGDROP_E_ALREADYREGISTERED\n");
CoLockObjectExternal ((IUnknown *) &ctx->idt, FALSE, FALSE);
}
else if (!SUCCEEDED (hr))
OTHER_API_FAILED ("RegisterDragDrop");
else
{
g_object_ref (window);
g_hash_table_insert (target_ctx_for_window, GDK_WINDOW_HWND (window), ctx);
}
}
}
}
static gboolean
gdk_win32_drag_context_drop_status (GdkDragContext *context)
{
return ! PRIVATE_DATA (context)->drop_failed;
}
static GdkAtom
gdk_win32_drag_context_get_selection (GdkDragContext *context)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_LOCAL:
return _local_dnd;
case GDK_DRAG_PROTO_WIN32_DROPFILES:
return _gdk_win32_dropfiles;
case GDK_DRAG_PROTO_OLE2:
return _gdk_ole2_dnd;
default:
return GDK_NONE;
}
}
static void
gdk_win32_drag_context_class_init (GdkWin32DragContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkDragContextClass *context_class = GDK_DRAG_CONTEXT_CLASS (klass);
gdk_win32_drag_context_parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gdk_win32_drag_context_finalize;
context_class->find_window = gdk_win32_drag_context_find_window;
context_class->drag_status = gdk_win32_drag_context_drag_status;
context_class->drag_motion = gdk_win32_drag_context_drag_motion;
context_class->drag_abort = gdk_win32_drag_context_drag_abort;
context_class->drag_drop = gdk_win32_drag_context_drag_drop;
context_class->drop_reply = gdk_win32_drag_context_drop_reply;
context_class->drop_finish = gdk_win32_drag_context_drop_finish;
context_class->drop_status = gdk_win32_drag_context_drop_status;
context_class->get_selection = gdk_win32_drag_context_get_selection;
g_type_class_add_private (object_class, sizeof (GdkDragContextPrivateWin32));
}
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