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gtk2/gdk/win32/gdkdnd-win32.c
Tim Janik afee2c67c5 applied patch from Andreas Persenius <ndap@swipnet.se> that updates the 
Wed Jul 26 12:59:31 2000  Tim Janik  <timj@gtk.org>

        * *.[hc]: applied patch from Andreas Persenius <ndap@swipnet.se> that
        updates the license headers to the GNU Lesser General Public License,
        as well as updating the copyright year to 2000.
2000-07-26 11:33:08 +00:00

1325 lines
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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 1998-1999 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>
/* #define OLE2_DND */
#define INITGUID
#include "gdkdnd.h"
#include "gdkproperty.h"
#include "gdkinternals.h"
#include "gdkprivate-win32.h"
#ifdef OLE2_DND
#include <ole2.h>
#else
#include <objbase.h>
#endif
#include <shlobj.h>
#include <shlguid.h>
#include <gdk/gdk.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
} GtkDragStatus;
typedef enum {
GDK_DRAG_SOURCE,
GDK_DRAG_TARGET
} GdkDragKind;
#ifdef OLE2_DND
#define PRINT_GUID(guid) \
g_print ("guid = %.08x-%.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;
#endif /* OLE2_DND */
/* Structure that holds information about a drag in progress.
* this is used on both source and destination sides.
*/
struct _GdkDragContextPrivateWin32 {
gint ref_count;
guint16 last_x; /* Coordinates from last event */
guint16 last_y;
HWND dest_xid;
guint drag_status; /* Current status of drag */
};
#define PRIVATE_DATA(context) ((GdkDragContextPrivateWin32 *) GDK_DRAG_CONTEXT (context)->windowing_data)
GdkDragContext *current_dest_drag = NULL;
static void gdk_drag_context_init (GdkDragContext *dragcontext);
static void gdk_drag_context_class_init (GdkDragContextClass *klass);
static void gdk_drag_context_finalize (GObject *object);
static gpointer parent_class = NULL;
static GList *contexts;
GType
gdk_drag_context_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
static const GTypeInfo object_info =
{
sizeof (GdkDragContextClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gdk_drag_context_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkDragContext),
0, /* n_preallocs */
(GInstanceInitFunc) gdk_drag_context_init,
};
object_type = g_type_register_static (G_TYPE_OBJECT,
"GdkDragContext",
&object_info);
}
return object_type;
}
static void
gdk_drag_context_init (GdkDragContext *dragcontext)
{
GdkDragContextPrivateWin32 *private = g_new0 (GdkDragContextPrivateWin32, 1);
dragcontext->windowing_data = private;
private->ref_count = 1;
contexts = g_list_prepend (contexts, dragcontext);
}
static void
gdk_drag_context_class_init (GdkDragContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gdk_drag_context_finalize;
}
static void
gdk_drag_context_finalize (GObject *object)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (object);
GdkDragContextPrivateWin32 *private = PRIVATE_DATA (context);
g_list_free (context->targets);
if (context->source_window)
{
gdk_window_unref (context->source_window);
}
if (context->dest_window)
gdk_window_unref (context->dest_window);
contexts = g_list_remove (contexts, context);
g_free (private);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/* Drag Contexts */
GdkDragContext *
gdk_drag_context_new (void)
{
return g_object_new (gdk_drag_context_get_type (), NULL);
}
void
gdk_drag_context_ref (GdkDragContext *context)
{
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
g_object_ref (G_OBJECT (context));
}
void
gdk_drag_context_unref (GdkDragContext *context)
{
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
g_object_unref (G_OBJECT (context));
}
#if 0
static GdkDragContext *
gdk_drag_context_find (gboolean is_source,
HWND source_xid,
HWND dest_xid)
{
GList *tmp_list = contexts;
GdkDragContext *context;
while (tmp_list)
{
context = (GdkDragContext *)tmp_list->data;
if ((!context->is_source == !is_source) &&
((source_xid == None) || (context->source_window &&
(GDK_WINDOW_XWINDOW (context->source_window) == source_xid))) &&
((dest_xid == None) || (context->dest_window &&
(GDK_WINDOW_XWINDOW (context->dest_window) == dest_xid))))
return context;
tmp_list = tmp_list->next;
}
return NULL;
}
#endif
typedef struct {
#ifdef OLE2_DND
IDropTarget idt;
#endif
GdkDragContext *context;
} target_drag_context;
typedef struct {
#ifdef OLE2_DND
IDropSource ids;
#endif
GdkDragContext *context;
} source_drag_context;
#ifdef OLE2_DND
typedef struct {
IDataObject ido;
int ref_count;
} data_object;
typedef struct {
IEnumFORMATETC ief;
int ref_count;
int ix;
} enum_formats;
static enum_formats *enum_formats_new (void);
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_drag_context_ref (ctx->context);
GDK_NOTE (DND, g_print ("idroptarget_addref %#x %d\n", This, ref_count));
return ref_count;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_queryinterface (LPDROPTARGET This,
REFIID riid,
LPVOID *ppvObject)
{
GDK_NOTE (DND, g_print ("idroptarget_queryinterface %#x\n", This));
*ppvObject = NULL;
PRINT_GUID (riid);
if (IsEqualGUID (riid, &IID_IUnknown))
{
g_print ("...IUnknown\n");
idroptarget_addref (This);
*ppvObject = This;
return S_OK;
}
else if (IsEqualGUID (riid, &IID_IDropTarget))
{
g_print ("...IDropTarget\n");
idroptarget_addref (This);
*ppvObject = This;
return S_OK;
}
else
{
g_print ("...Huh?\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_drag_context_unref (ctx->context);
GDK_NOTE (DND, g_print ("idroptarget_release %#x %d\n", This, ref_count));
if (ref_count == 0)
g_free (This);
return ref_count;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_dragenter (LPDROPTARGET This,
LPDATAOBJECT pDataObj,
DWORD grfKeyState,
POINTL pt,
LPDWORD pdwEffect)
{
GDK_NOTE (DND, g_print ("idroptarget_dragenter %#x\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_dragover (LPDROPTARGET This,
DWORD grfKeyState,
POINTL pt,
LPDWORD pdwEffect)
{
GDK_NOTE (DND, g_print ("idroptarget_dragover %#x\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_dragleave (LPDROPTARGET This)
{
GDK_NOTE (DND, g_print ("idroptarget_dragleave %#x\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_drop (LPDROPTARGET This,
LPDATAOBJECT pDataObj,
DWORD grfKeyState,
POINTL pt,
LPDWORD pdwEffect)
{
GDK_NOTE (DND, g_print ("idroptarget_drop %#x\n", This));
return E_UNEXPECTED;
}
static ULONG STDMETHODCALLTYPE
idropsource_addref (LPDROPSOURCE This)
{
source_drag_context *ctx = (source_drag_context *) This;
GdkDragContextPrivateWin32 *private = PRIVATE_DATA (ctx->context);
gdk_drag_context_ref (ctx->context);
GDK_NOTE (DND, g_print ("idropsource_addref %#x %d\n",
This, private->ref_count));
return private->ref_count;
}
static HRESULT STDMETHODCALLTYPE
idropsource_queryinterface (LPDROPSOURCE This,
REFIID riid,
LPVOID *ppvObject)
{
GDK_NOTE (DND, g_print ("idropsource_queryinterface %#x\n", This));
*ppvObject = NULL;
PRINT_GUID (riid);
if (IsEqualGUID (riid, &IID_IUnknown))
{
g_print ("...IUnknown\n");
idropsource_addref (This);
*ppvObject = This;
return S_OK;
}
else if (IsEqualGUID (riid, &IID_IDropSource))
{
g_print ("...IDropSource\n");
idropsource_addref (This);
*ppvObject = This;
return S_OK;
}
else
{
g_print ("...Huh?\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_drag_context_unref (ctx->context);
GDK_NOTE (DND, g_print ("idropsource_release %#x %d\n", This, ref_count));
if (ref_count == 0)
g_free (This);
return ref_count;
}
static HRESULT STDMETHODCALLTYPE
idropsource_querycontinuedrag (LPDROPSOURCE This,
BOOL fEscapePressed,
DWORD grfKeyState)
{
GDK_NOTE (DND, g_print ("idropsource_querycontinuedrag %#x\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idropsource_givefeedback (LPDROPSOURCE This,
DWORD dwEffect)
{
GDK_NOTE (DND, g_print ("idropsource_givefeedback %#x\n", This));
return E_UNEXPECTED;
}
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 %#x %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 %#x\n", This));
*ppvObject = NULL;
PRINT_GUID (riid);
if (IsEqualGUID (riid, &IID_IUnknown))
{
g_print ("...IUnknown\n");
idataobject_addref (This);
*ppvObject = This;
return S_OK;
}
else if (IsEqualGUID (riid, &IID_IDataObject))
{
g_print ("...IDataObject\n");
idataobject_addref (This);
*ppvObject = This;
return S_OK;
}
else
{
g_print ("...Huh?\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 %#x %d\n", This, ref_count));
if (ref_count == 0)
g_free (This);
return ref_count;
}
static HRESULT STDMETHODCALLTYPE
idataobject_getdata (LPDATAOBJECT This,
LPFORMATETC pFormatEtc,
LPSTGMEDIUM pMedium)
{
GDK_NOTE (DND, g_print ("idataobject_getdata %#x\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idataobject_getdatahere (LPDATAOBJECT This,
LPFORMATETC pFormatEtc,
LPSTGMEDIUM pMedium)
{
GDK_NOTE (DND, g_print ("idataobject_getdatahere %#x\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idataobject_querygetdata (LPDATAOBJECT This,
LPFORMATETC pFormatEtc)
{
int i;
GDK_NOTE (DND, g_print ("idataobject_querygetdata %#x %#x", This, pFormatEtc->cfFormat));
for (i = 0; i < nformats; i++)
if (pFormatEtc->cfFormat == formats[i].cfFormat)
{
GDK_NOTE (DND, g_print (" S_OK\n"));
return S_OK;
}
GDK_NOTE (DND, g_print (" DV_E_FORMATETC\n"));
return DV_E_FORMATETC;
}
static HRESULT STDMETHODCALLTYPE
idataobject_getcanonicalformatetc (LPDATAOBJECT This,
LPFORMATETC pFormatEtcIn,
LPFORMATETC pFormatEtcOut)
{
GDK_NOTE (DND, g_print ("idataobject_getcanonicalformatetc %#x\n", This));
return E_FAIL;
}
static HRESULT STDMETHODCALLTYPE
idataobject_setdata (LPDATAOBJECT This,
LPFORMATETC pFormatEtc,
LPSTGMEDIUM pMedium,
BOOL fRelease)
{
GDK_NOTE (DND, g_print ("idataobject_setdata %#x\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idataobject_enumformatetc (LPDATAOBJECT This,
DWORD dwDirection,
LPENUMFORMATETC *ppEnumFormatEtc)
{
GDK_NOTE (DND, g_print ("idataobject_enumformatetc %#x\n", This));
if (dwDirection != DATADIR_GET)
return E_NOTIMPL;
*ppEnumFormatEtc = &enum_formats_new ()->ief;
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 %#x\n", This));
return E_FAIL;
}
static HRESULT STDMETHODCALLTYPE
idataobject_dunadvise (LPDATAOBJECT This,
DWORD dwConnection)
{
GDK_NOTE (DND, g_print ("idataobject_dunadvise %#x\n", This));
return E_FAIL;
}
static HRESULT STDMETHODCALLTYPE
idataobject_enumdadvise (LPDATAOBJECT This,
LPENUMSTATDATA *ppenumAdvise)
{
GDK_NOTE (DND, g_print ("idataobject_enumdadvise %#x\n", This));
return E_FAIL;
}
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 %#x %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 %#x\n", This));
*ppvObject = NULL;
PRINT_GUID (riid);
if (IsEqualGUID (riid, &IID_IUnknown))
{
g_print ("...IUnknown\n");
ienumformatetc_addref (This);
*ppvObject = This;
return S_OK;
}
else if (IsEqualGUID (riid, &IID_IEnumFORMATETC))
{
g_print ("...IEnumFORMATETC\n");
ienumformatetc_addref (This);
*ppvObject = This;
return S_OK;
}
else
{
g_print ("...Huh?\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 %#x %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 %#x %d %d\n", 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;
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 %#x %d %d\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 %#x\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 %#x\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
};
#endif /* OLE2_DND */
static target_drag_context *
target_context_new (void)
{
target_drag_context *result;
result = g_new0 (target_drag_context, 1);
#ifdef OLE2_DND
result->idt.lpVtbl = &idt_vtbl;
#endif
result->context = gdk_drag_context_new ();
result->context->is_source = FALSE;
GDK_NOTE (DND, g_print ("target_context_new: %#x\n", result));
return result;
}
static source_drag_context *
source_context_new (void)
{
source_drag_context *result;
result = g_new0 (source_drag_context, 1);
#ifdef OLE2_DND
result->ids.lpVtbl = &ids_vtbl;
#endif
result->context = gdk_drag_context_new ();
result->context->is_source = TRUE;
GDK_NOTE (DND, g_print ("source_context_new: %#x\n", result));
return result;
}
#ifdef OLE2_DND
static data_object *
data_object_new (void)
{
data_object *result;
result = g_new0 (data_object, 1);
result->ido.lpVtbl = &ido_vtbl;
result->ref_count = 1;
GDK_NOTE (DND, g_print ("data_object_new: %#x\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;
GDK_NOTE (DND, g_print ("enum_formats_new: %#x\n", result));
return result;
}
#endif
/* From MS Knowledge Base article Q130698 */
/* resolve_link() fills the filename and path buffer
* with relevant information
* hWnd - calling app's window handle.
*
* lpszLinkName - name of the link file passed into the function.
*
* lpszPath - the buffer that will receive the file pathname.
*/
static HRESULT
resolve_link(HWND hWnd,
LPCTSTR lpszLinkName,
LPSTR lpszPath,
LPSTR lpszDescription)
{
HRESULT hres;
IShellLink *psl;
WIN32_FIND_DATA wfd;
/* Assume Failure to start with: */
*lpszPath = 0;
if (lpszDescription)
*lpszDescription = 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.
*/
hres = CoCreateInstance (&CLSID_ShellLink,
NULL,
CLSCTX_INPROC_SERVER,
&IID_IShellLink,
(LPVOID *)&psl);
if (SUCCEEDED (hres))
{
IPersistFile *ppf;
/* The IShellLink interface supports the IPersistFile
* interface. Get an interface pointer to it.
*/
hres = psl->lpVtbl->QueryInterface (psl,
&IID_IPersistFile,
(LPVOID *) &ppf);
if (SUCCEEDED (hres))
{
WORD wsz[MAX_PATH];
/* Convert the given link name string to wide character string. */
MultiByteToWideChar (CP_ACP, 0,
lpszLinkName,
-1, wsz, MAX_PATH);
/* Load the file. */
hres = ppf->lpVtbl->Load (ppf, wsz, STGM_READ);
if (SUCCEEDED (hres))
{
/* Resolve the link by calling the Resolve()
* interface function.
*/
hres = psl->lpVtbl->Resolve(psl, hWnd,
SLR_ANY_MATCH |
SLR_NO_UI);
if (SUCCEEDED (hres))
{
hres = psl->lpVtbl->GetPath (psl, lpszPath,
MAX_PATH,
(WIN32_FIND_DATA*)&wfd,
0);
if (SUCCEEDED (hres) && lpszDescription != NULL)
{
hres = psl->lpVtbl->GetDescription (psl,
lpszDescription,
MAX_PATH );
if (!SUCCEEDED (hres))
return FALSE;
}
}
}
ppf->lpVtbl->Release (ppf);
}
psl->lpVtbl->Release (psl);
}
return SUCCEEDED (hres);
}
static GdkFilterReturn
gdk_dropfiles_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
GdkDragContext *context;
GdkDragContextPrivateWin32 *private;
static GdkAtom text_uri_list_atom = GDK_NONE;
GString *result;
MSG *msg = (MSG *) xev;
HANDLE hdrop;
POINT pt;
gint nfiles, i, k;
guchar fileName[MAX_PATH], linkedFile[MAX_PATH];
if (text_uri_list_atom == GDK_NONE)
text_uri_list_atom = gdk_atom_intern ("text/uri-list", FALSE);
if (msg->message == WM_DROPFILES)
{
GDK_NOTE (DND, g_print ("WM_DROPFILES: %#x\n", msg->hwnd));
context = gdk_drag_context_new ();
private = PRIVATE_DATA (context);
context->protocol = GDK_DRAG_PROTO_WIN32_DROPFILES;
context->is_source = FALSE;
context->source_window = gdk_parent_root;
context->dest_window = event->any.window;
gdk_drawable_ref (context->dest_window);
/* WM_DROPFILES drops are always file names */
context->targets =
g_list_append (NULL, GUINT_TO_POINTER (text_uri_list_atom));
current_dest_drag = context;
event->dnd.type = GDK_DROP_START;
event->dnd.context = current_dest_drag;
gdk_drag_context_ref (current_dest_drag);
hdrop = (HANDLE) msg->wParam;
DragQueryPoint (hdrop, &pt);
ClientToScreen (msg->hwnd, &pt);
event->dnd.x_root = pt.x;
event->dnd.y_root = pt.y;
event->dnd.time = msg->time;
nfiles = DragQueryFile (hdrop, 0xFFFFFFFF, NULL, 0);
result = g_string_new (NULL);
for (i = 0; i < nfiles; i++)
{
g_string_append (result, "file:");
DragQueryFile (hdrop, i, fileName, MAX_PATH);
/* Resolve shortcuts */
if (resolve_link (msg->hwnd, fileName, linkedFile, NULL))
{
g_string_append (result, linkedFile);
GDK_NOTE (DND, g_print ("...%s link to %s\n",
fileName, linkedFile));
}
else
{
g_string_append (result, fileName);
GDK_NOTE (DND, g_print ("...%s\n", fileName));
}
g_string_append (result, "\015\012");
}
gdk_sel_prop_store (gdk_parent_root, text_uri_list_atom, 8,
result->str, result->len + 1);
DragFinish (hdrop);
return GDK_FILTER_TRANSLATE;
}
else
return GDK_FILTER_CONTINUE;
}
/*************************************************************
************************** Public API ***********************
*************************************************************/
void
gdk_dnd_init (void)
{
#ifdef OLE2_DND
HRESULT hres;
hres = OleInitialize (NULL);
if (! SUCCEEDED (hres))
g_error ("OleInitialize failed");
nformats = 2;
formats = g_new (FORMATETC, nformats);
formats[0].cfFormat = CF_TEXT;
formats[0].ptd = NULL;
formats[0].dwAspect = DVASPECT_CONTENT;
formats[0].lindex = -1;
formats[0].tymed = TYMED_HGLOBAL;
formats[1].cfFormat = CF_GDIOBJFIRST;
formats[1].ptd = NULL;
formats[1].dwAspect = DVASPECT_CONTENT;
formats[1].lindex = -1;
formats[1].tymed = TYMED_HGLOBAL;
#endif
}
void
gdk_win32_dnd_exit (void)
{
#ifdef OLE2_DND
OleUninitialize ();
#endif
}
/* Source side */
static void
gdk_drag_do_leave (GdkDragContext *context,
guint32 time)
{
if (context->dest_window)
{
GDK_NOTE (DND, g_print ("gdk_drag_do_leave\n"));
gdk_drawable_unref (context->dest_window);
context->dest_window = NULL;
}
}
GdkDragContext *
gdk_drag_begin (GdkWindow *window,
GList *targets)
{
GList *tmp_list;
source_drag_context *ctx;
#ifdef OLE2_DND
data_object *dobj;
HRESULT hResult;
DWORD dwEffect;
HGLOBAL global;
FORMATETC format;
STGMEDIUM medium;
#endif
g_return_val_if_fail (window != NULL, NULL);
GDK_NOTE (DND, g_print ("gdk_drag_begin\n"));
ctx = source_context_new ();
ctx->context->protocol = GDK_DRAG_PROTO_OLE2;
ctx->context->source_window = window;
gdk_drawable_ref (window);
#ifdef OLE2_DND
tmp_list = g_list_last (targets);
ctx->context->targets = NULL;
while (tmp_list)
{
ctx->context->targets = g_list_prepend (ctx->context->targets,
tmp_list->data);
tmp_list = tmp_list->prev;
}
ctx->context->actions = 0;
dobj = data_object_new ();
global = GlobalAlloc (GMEM_FIXED, sizeof (ctx));
memcpy (&global, ctx, sizeof (ctx));
medium.tymed = TYMED_HGLOBAL;
medium.hGlobal = global;
medium.pUnkForRelease = NULL;
dobj->ido.lpVtbl->SetData (&dobj->ido, &formats[1], &medium, TRUE);
hResult = DoDragDrop (&dobj->ido, &ctx->ids, DROPEFFECT_MOVE|DROPEFFECT_COPY, &dwEffect);
GDK_NOTE (DND, g_print ("DoDragDrop returned %s\n",
(hResult == DRAGDROP_S_DROP ? "DRAGDROP_S_DROP" :
(hResult == DRAGDROP_S_CANCEL ? "DRAGDROP_S_CANCEL" :
(hResult == E_UNEXPECTED ? "E_UNEXPECTED" :
g_strdup_printf ("%#.8x", hResult))))));
dobj->ido.lpVtbl->Release (&dobj->ido);
ctx->ids.lpVtbl->Release (&ctx->ids);
#endif
return ctx->context;
}
guint32
gdk_drag_get_protocol (guint32 xid,
GdkDragProtocol *protocol)
{
/* This isn't used */
return 0;
}
void
gdk_drag_find_window (GdkDragContext *context,
GdkWindow *drag_window,
gint x_root,
gint y_root,
GdkWindow **dest_window,
GdkDragProtocol *protocol)
{
GdkDragContextPrivateWin32 *private = PRIVATE_DATA (context);
HWND recipient;
POINT pt;
GDK_NOTE (DND, g_print ("gdk_drag_find_window: %#x +%d+%d\n",
(drag_window ? GDK_WINDOW_HWND (drag_window) : 0),
x_root, y_root));
pt.x = x_root;
pt.y = y_root;
recipient = WindowFromPoint (pt);
if (recipient == NULL)
*dest_window = NULL;
else
{
*dest_window = gdk_win32_handle_table_lookup (recipient);
if (*dest_window)
gdk_drawable_ref (*dest_window);
*protocol = GDK_DRAG_PROTO_WIN32_DROPFILES;
}
}
gboolean
gdk_drag_motion (GdkDragContext *context,
GdkWindow *dest_window,
GdkDragProtocol protocol,
gint x_root,
gint y_root,
GdkDragAction suggested_action,
GdkDragAction possible_actions,
guint32 time)
{
GDK_NOTE (DND, g_print ("gdk_drag_motion\n"));
return FALSE;
}
void
gdk_drag_drop (GdkDragContext *context,
guint32 time)
{
g_return_if_fail (context != NULL);
GDK_NOTE (DND, g_print ("gdk_drag_drop\n"));
}
void
gdk_drag_abort (GdkDragContext *context,
guint32 time)
{
g_return_if_fail (context != NULL);
GDK_NOTE (DND, g_print ("gdk_drag_abort\n"));
gdk_drag_do_leave (context, time);
}
/* Destination side */
void
gdk_drag_status (GdkDragContext *context,
GdkDragAction action,
guint32 time)
{
GDK_NOTE (DND, g_print ("gdk_drag_status\n"));
}
void
gdk_drop_reply (GdkDragContext *context,
gboolean ok,
guint32 time)
{
GDK_NOTE (DND, g_print ("gdk_drop_reply\n"));
}
void
gdk_drop_finish (GdkDragContext *context,
gboolean success,
guint32 time)
{
GDK_NOTE (DND, g_print ("gdk_drop_finish\n"));
}
static GdkFilterReturn
gdk_destroy_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
#ifdef OLE2_DND
MSG *msg = (MSG *) xev;
if (msg->message == WM_DESTROY)
{
IDropTarget *idtp = (IDropTarget *) data;
GDK_NOTE (DND, g_print ("gdk_destroy_filter: WM_DESTROY: %#x\n", msg->hwnd));
#if 0
idtp->lpVtbl->Release (idtp);
#endif
RevokeDragDrop (msg->hwnd);
CoLockObjectExternal (idtp, FALSE, TRUE);
}
#endif
return GDK_FILTER_CONTINUE;
}
void
gdk_window_register_dnd (GdkWindow *window)
{
#ifdef OLE2_DND
target_drag_context *ctx;
HRESULT hres;
#endif
g_return_if_fail (window != NULL);
GDK_NOTE (DND, g_print ("gdk_window_register_dnd: %#x\n",
GDK_WINDOW_HWND (window)));
/* 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);
#ifdef OLE2_DND
/* Register for OLE2 d&d */
ctx = target_context_new ();
ctx->context->protocol = GDK_DRAG_PROTO_OLE2;
hres = CoLockObjectExternal ((IUnknown *) &ctx->idt, TRUE, FALSE);
if (!SUCCEEDED (hres))
OTHER_API_FAILED ("CoLockObjectExternal");
else
{
hres = RegisterDragDrop (GDK_WINDOW_HWND (window), &ctx->idt);
if (hres == DRAGDROP_E_ALREADYREGISTERED)
{
g_print ("DRAGDROP_E_ALREADYREGISTERED\n");
#if 0
ctx->idt.lpVtbl->Release (&ctx->idt);
#endif
CoLockObjectExternal ((IUnknown *) &ctx->idt, FALSE, FALSE);
}
else if (!SUCCEEDED (hres))
OTHER_API_FAILED ("RegisterDragDrop");
else
{
gdk_window_add_filter (window, gdk_destroy_filter, &ctx->idt);
}
}
#endif
}
/*************************************************************
* gdk_drag_get_selection:
* Returns the selection atom for the current source window
* arguments:
*
* results:
*************************************************************/
GdkAtom
gdk_drag_get_selection (GdkDragContext *context)
{
if (context->protocol == GDK_DRAG_PROTO_WIN32_DROPFILES)
return gdk_win32_dropfiles_atom;
else if (context->protocol == GDK_DRAG_PROTO_OLE2)
return gdk_ole2_dnd_atom;
else
return GDK_NONE;
}
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