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gtk/gdk/win32/gdkdnd-win32.c
Tor Lillqvist 33902a67f0 New function, callback proc for EnumWindows(). 
2003-06-30  Tor Lillqvist  <tml@iki.fi>

	* gdk/win32/gdkdnd-win32.c (find_window_enum_proc): New function,
	callback proc for EnumWindows().
	(gdk_drag_find_window_for_screen): Actually take the drag_window
	argument into account: Instead of using WindowFromPoint(), use
	EnumWindows(), to be able to skip the drag_window. (#116320, Tony
	M Brown, Herman Bloggs)

	* gdk/win32/*.c: Replace gdk_drawable_ref()/unref() and
	gdk_window_ref()/unref() calls with g_object_ref()/unref().
	Consistently use %p format in debugging output of pointers and
	HANDLEs.
2003-06-30 21:58:24 +00:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
* 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 <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 GDK_DRAG_CONTEXT_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, 0);
}
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 = GDK_DRAG_CONTEXT_PRIVATE_DATA (context);
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);
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));
GDK_NOTE (DND, g_print ("gdk_drag_context_ref: %p %d\n", context, G_OBJECT(context)->ref_count));
g_object_ref (context);
}
void
gdk_drag_context_unref (GdkDragContext *context)
{
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
GDK_NOTE (DND, g_print ("gdk_drag_context_unref: %p %d\n", context, G_OBJECT(context)->ref_count));
g_object_unref (context);
}
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 = GDK_DRAG_CONTEXT_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;
}
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 = GDK_DRAG_CONTEXT_PRIVATE_DATA (ctx->context);
int ref_count = ++private->ref_count;
gdk_drag_context_ref (ctx->context);
GDK_NOTE (DND, g_print ("idroptarget_addref %p %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 %p\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 = GDK_DRAG_CONTEXT_PRIVATE_DATA (ctx->context);
int ref_count = --private->ref_count;
gdk_drag_context_unref (ctx->context);
GDK_NOTE (DND, g_print ("idroptarget_release %p %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 %p\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 %p\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_dragleave (LPDROPTARGET This)
{
GDK_NOTE (DND, g_print ("idroptarget_dragleave %p\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 %p\n", This));
return E_UNEXPECTED;
}
static ULONG STDMETHODCALLTYPE
idropsource_addref (LPDROPSOURCE This)
{
source_drag_context *ctx = (source_drag_context *) This;
GdkDragContextPrivateWin32 *private = GDK_DRAG_CONTEXT_PRIVATE_DATA (ctx->context);
gdk_drag_context_ref (ctx->context);
GDK_NOTE (DND, g_print ("idropsource_addref %p %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 %p\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 = GDK_DRAG_CONTEXT_PRIVATE_DATA (ctx->context);
int ref_count = --private->ref_count;
gdk_drag_context_unref (ctx->context);
GDK_NOTE (DND, g_print ("idropsource_release %p %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 %p\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idropsource_givefeedback (LPDROPSOURCE This,
DWORD dwEffect)
{
GDK_NOTE (DND, g_print ("idropsource_givefeedback %p\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 %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\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 %p %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 %p\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idataobject_getdatahere (LPDATAOBJECT This,
LPFORMATETC pFormatEtc,
LPSTGMEDIUM pMedium)
{
GDK_NOTE (DND, g_print ("idataobject_getdatahere %p\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idataobject_querygetdata (LPDATAOBJECT This,
LPFORMATETC pFormatEtc)
{
int i;
GDK_NOTE (DND, g_print ("idataobject_querygetdata %p %#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 %p\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 %p\n", This));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idataobject_enumformatetc (LPDATAOBJECT This,
DWORD dwDirection,
LPENUMFORMATETC *ppEnumFormatEtc)
{
GDK_NOTE (DND, g_print ("idataobject_enumformatetc %p\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 %p\n", This));
return E_FAIL;
}
static HRESULT STDMETHODCALLTYPE
idataobject_dunadvise (LPDATAOBJECT This,
DWORD dwConnection)
{
GDK_NOTE (DND, g_print ("idataobject_dunadvise %p\n", This));
return E_FAIL;
}
static HRESULT STDMETHODCALLTYPE
idataobject_enumdadvise (LPDATAOBJECT This,
LPENUMSTATDATA *ppenumAdvise)
{
GDK_NOTE (DND, g_print ("idataobject_enumdadvise %p\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 %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\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 %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 %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 %p %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 %p\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\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 (void)
{
target_drag_context *result;
result = g_new0 (target_drag_context, 1);
result->idt.lpVtbl = &idt_vtbl;
result->context = gdk_drag_context_new ();
result->context->is_source = FALSE;
GDK_NOTE (DND, g_print ("target_context_new: %p\n", result));
return result;
}
static source_drag_context *
source_context_new (void)
{
source_drag_context *result;
result = g_new0 (source_drag_context, 1);
result->ids.lpVtbl = &ids_vtbl;
result->context = gdk_drag_context_new ();
result->context->is_source = TRUE;
GDK_NOTE (DND, g_print ("source_context_new: %p\n", result));
return result;
}
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: %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;
GDK_NOTE (DND, g_print ("enum_formats_new: %p\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;
GString *result;
MSG *msg = (MSG *) xev;
HANDLE hdrop;
POINT pt;
gint nfiles, i;
guchar fileName[MAX_PATH], linkedFile[MAX_PATH];
if (msg->message == WM_DROPFILES)
{
GDK_NOTE (DND, g_print ("WM_DROPFILES: %p\n", msg->hwnd));
context = gdk_drag_context_new ();
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (context);
context->protocol = GDK_DRAG_PROTO_WIN32_DROPFILES;
context->is_source = FALSE;
context->source_window = _gdk_parent_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, GUINT_TO_POINTER (_text_uri_list));
current_dest_drag = context;
event->dnd.type = GDK_DROP_START;
event->dnd.context = 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 = _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;
DragQueryFile (hdrop, i, fileName, MAX_PATH);
/* Resolve shortcuts */
if (resolve_link (msg->hwnd, fileName, linkedFile, NULL))
{
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);
}
}
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);
}
}
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;
}
/*************************************************************
************************** 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
local_send_leave (GdkDragContext *context,
guint32 time)
{
GdkEvent tmp_event;
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_LOCAL) &&
(current_dest_drag->source_window == context->source_window))
{
tmp_event.dnd.type = GDK_DRAG_LEAVE;
tmp_event.dnd.window = context->dest_window;
/* Pass ownership of context to the event */
tmp_event.dnd.send_event = FALSE;
tmp_event.dnd.context = current_dest_drag;
tmp_event.dnd.time = GDK_CURRENT_TIME; /* FIXME? */
current_dest_drag = NULL;
gdk_event_put (&tmp_event);
}
}
static void
local_send_enter (GdkDragContext *context,
guint32 time)
{
GdkEvent tmp_event;
GdkDragContextPrivateWin32 *private;
GdkDragContext *new_context;
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (context);
if (current_dest_drag != NULL)
{
gdk_drag_context_unref (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;
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.dnd.type = GDK_DRAG_ENTER;
tmp_event.dnd.window = context->dest_window;
tmp_event.dnd.send_event = FALSE;
tmp_event.dnd.context = new_context;
tmp_event.dnd.time = GDK_CURRENT_TIME; /* FIXME? */
current_dest_drag = new_context;
gdk_event_put (&tmp_event);
}
static void
local_send_motion (GdkDragContext *context,
gint x_root,
gint y_root,
GdkDragAction action,
guint32 time)
{
GdkEvent tmp_event;
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_LOCAL) &&
(current_dest_drag->source_window == context->source_window))
{
tmp_event.dnd.type = GDK_DRAG_MOTION;
tmp_event.dnd.window = current_dest_drag->dest_window;
tmp_event.dnd.send_event = FALSE;
tmp_event.dnd.context = current_dest_drag;
tmp_event.dnd.time = time;
current_dest_drag->suggested_action = action;
current_dest_drag->actions = current_dest_drag->suggested_action;
tmp_event.dnd.x_root = x_root;
tmp_event.dnd.y_root = y_root;
(GDK_DRAG_CONTEXT_PRIVATE_DATA (current_dest_drag))->last_x = x_root;
(GDK_DRAG_CONTEXT_PRIVATE_DATA (current_dest_drag))->last_y = y_root;
GDK_DRAG_CONTEXT_PRIVATE_DATA (context)->drag_status = GDK_DRAG_STATUS_MOTION_WAIT;
gdk_event_put (&tmp_event);
}
}
static void
local_send_drop (GdkDragContext *context,
guint32 time)
{
GdkEvent tmp_event;
if ((current_dest_drag != NULL) &&
(current_dest_drag->protocol == GDK_DRAG_PROTO_LOCAL) &&
(current_dest_drag->source_window == context->source_window))
{
GdkDragContextPrivateWin32 *private;
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (current_dest_drag);
tmp_event.dnd.type = GDK_DROP_START;
tmp_event.dnd.window = current_dest_drag->dest_window;
tmp_event.dnd.send_event = FALSE;
tmp_event.dnd.context = current_dest_drag;
tmp_event.dnd.time = GDK_CURRENT_TIME;
tmp_event.dnd.x_root = private->last_x;
tmp_event.dnd.y_root = private->last_y;
gdk_event_put (&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"));
switch (context->protocol)
{
case GDK_DRAG_PROTO_LOCAL:
local_send_leave (context, time);
break;
default:
break;
}
g_object_unref (context->dest_window);
context->dest_window = NULL;
}
}
GdkDragContext *
gdk_drag_begin (GdkWindow *window,
GList *targets)
{
#ifndef OLE2_DND
GList *tmp_list;
GdkDragContext *new_context;
g_return_val_if_fail (window != NULL, NULL);
new_context = gdk_drag_context_new ();
new_context->is_source = TRUE;
new_context->source_window = window;
g_object_ref (window);
tmp_list = g_list_last (targets);
new_context->targets = NULL;
while (tmp_list)
{
new_context->targets = g_list_prepend (new_context->targets,
tmp_list->data);
tmp_list = tmp_list->prev;
}
new_context->actions = 0;
return new_context;
#else
source_drag_context *ctx;
GList *tmp_list;
data_object *dobj;
HRESULT hResult;
DWORD dwEffect;
HGLOBAL global;
FORMATETC format;
STGMEDIUM medium;
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;
g_object_ref (window);
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);
return ctx->context;
#endif
}
guint32
gdk_drag_get_protocol_for_display (GdkDisplay *display,
guint32 xid,
GdkDragProtocol *protocol)
{
GdkWindow *window;
GDK_NOTE (DND, g_print ("gdk_drag_get_protocol\n"));
window = gdk_window_lookup (xid);
if (GPOINTER_TO_INT (gdk_drawable_get_data (window, "gdk-dnd-registered")))
{
*protocol = GDK_DRAG_PROTO_LOCAL;
return xid;
}
return 0;
}
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;
}
void
gdk_drag_find_window_for_screen (GdkDragContext *context,
GdkWindow *drag_window,
GdkScreen *screen,
gint x_root,
gint y_root,
GdkWindow **dest_window,
GdkDragProtocol *protocol)
{
find_window_enum_arg a;
a.x = x_root;
a.y = y_root;
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
{
*dest_window = gdk_win32_handle_table_lookup (GPOINTER_TO_UINT (a.result));
if (*dest_window)
{
*dest_window = gdk_window_get_toplevel (*dest_window);
g_object_ref (*dest_window);
}
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 %d\n",
(drag_window ? GDK_WINDOW_HWND (drag_window) : NULL),
x_root, y_root,
a.result,
(*dest_window ? GDK_WINDOW_HWND (*dest_window) : NULL),
*protocol));
}
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)
{
GdkDragContextPrivateWin32 *private;
g_return_val_if_fail (context != NULL, FALSE);
GDK_NOTE (DND, g_print ("gdk_drag_motion\n"));
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (context);
if (context->dest_window != dest_window)
{
GdkEvent temp_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
*/
temp_event.dnd.type = GDK_DRAG_STATUS;
temp_event.dnd.window = context->source_window;
/* We use this to signal a synthetic status. Perhaps
* we should use an extra field...
*/
temp_event.dnd.send_event = TRUE;
temp_event.dnd.context = context;
temp_event.dnd.time = time;
gdk_event_put (&temp_event);
}
else
{
context->suggested_action = suggested_action;
}
/* Send a drag-motion event */
private->last_x = x_root;
private->last_y = y_root;
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
return TRUE;
}
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"));
if (context->dest_window)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_LOCAL:
local_send_drop (context, time);
break;
case GDK_DRAG_PROTO_NONE:
g_warning ("GDK_DRAG_PROTO_NONE is not valid in gdk_drag_drop()");
break;
default:
break;
}
}
}
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)
{
GdkDragContextPrivateWin32 *private;
GdkDragContext *src_context;
GdkEvent tmp_event;
g_return_if_fail (context != NULL);
private = GDK_DRAG_CONTEXT_PRIVATE_DATA (context);
context->action = action;
src_context = gdk_drag_context_find (TRUE,
context->source_window,
context->dest_window);
if (src_context)
{
GdkDragContextPrivateWin32 *private = GDK_DRAG_CONTEXT_PRIVATE_DATA (src_context);
if (private->drag_status == GDK_DRAG_STATUS_MOTION_WAIT)
private->drag_status = GDK_DRAG_STATUS_DRAG;
tmp_event.dnd.type = GDK_DRAG_STATUS;
tmp_event.dnd.window = context->source_window;
tmp_event.dnd.send_event = FALSE;
tmp_event.dnd.context = src_context;
tmp_event.dnd.time = GDK_CURRENT_TIME; /* FIXME? */
if (action == GDK_ACTION_DEFAULT)
action = 0;
src_context->action = action;
gdk_event_put (&tmp_event);
}
}
void
gdk_drop_reply (GdkDragContext *context,
gboolean ok,
guint32 time)
{
g_return_if_fail (context != NULL);
GDK_NOTE (DND, g_print ("gdk_drop_reply\n"));
if (context->dest_window)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_WIN32_DROPFILES:
_gdk_dropfiles_store (NULL);
break;
default:
break;
}
}
}
void
gdk_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 = GDK_DRAG_CONTEXT_PRIVATE_DATA (context);
src_context = gdk_drag_context_find (TRUE,
context->source_window,
context->dest_window);
if (src_context)
{
tmp_event.dnd.type = GDK_DROP_FINISHED;
tmp_event.dnd.window = src_context->source_window;
tmp_event.dnd.send_event = FALSE;
tmp_event.dnd.context = src_context;
gdk_event_put (&tmp_event);
}
}
#ifdef OLE2_DND
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 (idtp, FALSE, TRUE);
}
return GDK_FILTER_CONTINUE;
}
#endif
void
gdk_window_register_dnd (GdkWindow *window)
{
#ifdef OLE2_DND
target_drag_context *ctx;
HRESULT hres;
#endif
g_return_if_fail (window != NULL);
if (GPOINTER_TO_INT (gdk_drawable_get_data (window, "gdk-dnd-registered")))
return;
gdk_drawable_set_data (window, "gdk-dnd-registered", GINT_TO_POINTER(TRUE), NULL);
GDK_NOTE (DND, g_print ("gdk_window_register_dnd: %p\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_LOCAL)
return _local_dnd;
else if (context->protocol == GDK_DRAG_PROTO_WIN32_DROPFILES)
return _gdk_win32_dropfiles;
else if (context->protocol == GDK_DRAG_PROTO_OLE2)
return _gdk_ole2_dnd;
else
return GDK_NONE;
}
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