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gtk2/gdk/win32/gdkdnd-win32.c
Руслан Ижбулатов c89c19d2f9 GDK W32: Make sure drag source window is not NULL 
This prevents GTK from throwing a bunch of warnings when it tries
to get drag source window -> screen of that window -> ipc widget for that screen,
and then tries to attach a signal handler to that widget.

Specifically, this happens when we get a DnD move from another
application.

https://bugzilla.gnome.org/show_bug.cgi?id=786509
2017-12-02 10:38:41 +00:00

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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, see <http://www.gnu.org/licenses/>.
*/
/*
* 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>
/*
* 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 the implementation:
*
* Source drag context, IDragSource and IDataObject for it are created
* (almost) simultaneously, whereas target drag context and IDropTarget
* are separated in time - IDropTarget is created when a window is made
* to accept drops, while target drag context is created when a dragging
* cursor enters the window and is destroyed when that cursor leaves
* the window.
*
* There's a mismatch between data types supported by W32 (W32 formats)
* and by GTK+ (GDK targets).
* To account for it the data is transmuted back and forth. There are two
* main points of transmutation:
* * GDK convert selection: transmute W32 data to GTK+ data
* * GDK window property change: transmute GTK+ data to W32 data
*
* There are also two points where data formats are considered:
* * When source drag context is created, it gets a list of GTK+ targets
* that it supports, these are matched to the W32 formats they
* correspond to (possibly with transmutation). New W32 formats for
* GTK+-specific formats are also created here (see below).
* * When target drag context is created, it queries the IDataObject
* for the list of W32 formats it supports and matches these to
* corresponding GTK+ formats that it will be able to provide
* (possibly with transmutation) later. Missing GDK targets for
* W32-specific formats are also created here (see below).
*
* W32 formats and GTK+ targets are both integers (CLIPFORMAT and GdkAtom
* respectively), but cannot be used interchangeably.
*
* To accommodate advanced GTK+ applications the code allows them to
* register drop targets that accept W32 data formats, and to register
* drag sources that provide W32 data formats. To do that they must
* register either with the string name of the format in question
* (for example, "Shell IDList Array") or, for unnamed pre-defined
* formats, register with the stringified constant name of the format
* in question (for example, "CF_UNICODETEXT").
* If such target format is accepted/provided, GDK will not try to
* transmute it to/from something else. Otherwise GDK will do the following
* transmutation:
* * If GTK+ application provides image/png, image/gif or image/jpeg,
* GDK will claim to also provide "PNG", "GIF" or "JFIF" respectively,
* and will pass these along verbatim.
* * If GTK+ application provides any GdkPixbuf-compatible target,
* GDK will also offer "PNG" and CF_DIB W32 formats.
* * If GTK+ application provides UTF8_STRING, GDK will also offer
* CF_UNICODETEXT (UTF-16-encoded) and CF_TEXT (encoded with thread-
* and locale-depenant codepage), and will do the conversion when such
* data is requested.
* * If GTK+ application accepts image/png, image/gif or image/jpeg,
* GDK will claim to also accept "PNG", "GIF" or "JFIF" respectively,
* and will pass these along verbatim.
* * If GTK+ application accepts image/bmp, GDK will
* claim to accept CF_DIB W32 format, and will convert
* it, changing the header, when such data is provided.
* * If GTK+ application accepts UTF8_STRING, GDK will
* claim to accept CF_UNICODETEXT and CF_TEXT, and will do
* the conversion when such data is provided.
* * If GTK+ application accepts text/uri-list, GDK will
* claim to accept "Shell IDList Array", and will do the
* conversion when such data is provided.
*
* Currently the conversion from text/uri-list to Shell IDList Array is not
* implemented, so it's not possible to drag & drop files from GTK+
* applications to non-GTK+ applications the same way one can drag files
* from Windows Explorer.
*
* To accommodate GTK+ application compaibility the code allows
* GTK+ applications to register drop targets that accept GTK+-specific
* data formats, and to register drag sources that provide GTK+-specific
* data formats. This is done by simply registering target atom names
* as clipboard formats. This way two GTK+ applications can exchange
* data in their native formats (both well-known ones, such as UTF8_STRING,
* and special, known only to specific applications). This will work just
* fine as long as both applications agree on what kind of data is stored
* under such format exactly.
*
* Note that clipboard format space is limited, there can only be 16384
* of them for a particular user session. Therefore it is highly inadvisable
* to create and register such formats out of the whole cloth, dynamically.
* If more flexibility is needed, register one format that has some
* internal indicators of the kind of data it contains, then write the application
* in such a way that it requests the data and inspects its header before deciding
* whether to accept it or not. For details see GTK+ drag & drop documentation
* on the "drag-motion" and "drag-data-received" signals.
*/
/* The mingw.org compiler does not export GUIDS in it's import library. To work
* around that, define INITGUID to have the GUIDS declared. */
#if defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR)
#define INITGUID
#endif
/* For C-style COM wrapper macros */
#define COBJMACROS
#include "gdkdnd.h"
#include "gdkproperty.h"
#include "gdkinternals.h"
#include "gdkprivate-win32.h"
#include "gdkwin32.h"
#include "gdkwin32dnd.h"
#include "gdkdisplayprivate.h"
#include "gdk/gdkdndprivate.h"
#include "gdkwin32dnd-private.h"
#include "gdkdisplay-win32.h"
#include "gdkselection-win32.h"
#include "gdkdeviceprivate.h"
#include <ole2.h>
#include <shlobj.h>
#include <shlguid.h>
#include <objidl.h>
#include <gdk/gdk.h>
#include <glib/gstdio.h>
/* from gdkselection-win32.c */
extern GdkAtom *known_pixbuf_formats;
extern int n_known_pixbuf_formats;
typedef enum {
GDK_DRAG_STATUS_DRAG,
GDK_DRAG_STATUS_MOTION_WAIT,
GDK_DRAG_STATUS_ACTION_WAIT,
GDK_DRAG_STATUS_DROP
} GdkDragStatus;
static GList *contexts;
static GdkDragContext *current_dest_drag = NULL;
static gboolean use_ole2_dnd = FALSE;
G_DEFINE_TYPE (GdkWin32DragContext, gdk_win32_drag_context, GDK_TYPE_DRAG_CONTEXT)
static void
move_drag_window (GdkDragContext *context,
guint x_root,
guint y_root)
{
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
gdk_window_move (context_win32->drag_window,
x_root - context_win32->hot_x,
y_root - context_win32->hot_y);
gdk_window_raise (context_win32->drag_window);
}
static void
gdk_win32_drag_context_init (GdkWin32DragContext *context)
{
if (!use_ole2_dnd)
{
contexts = g_list_prepend (contexts, context);
}
else
{
}
GDK_NOTE (DND, g_print ("gdk_drag_context_init %p\n", context));
}
static void
gdk_win32_drag_context_finalize (GObject *object)
{
GdkDragContext *context;
GdkWin32DragContext *context_win32;
GdkWindow *drag_window;
GDK_NOTE (DND, g_print ("gdk_drag_context_finalize %p\n", object));
g_return_if_fail (GDK_IS_WIN32_DRAG_CONTEXT (object));
context = GDK_DRAG_CONTEXT (object);
context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
if (!use_ole2_dnd)
{
contexts = g_list_remove (contexts, context);
if (context == current_dest_drag)
current_dest_drag = NULL;
}
drag_window = context_win32->drag_window;
g_array_unref (context_win32->droptarget_format_target_map);
G_OBJECT_CLASS (gdk_win32_drag_context_parent_class)->finalize (object);
if (drag_window)
gdk_window_destroy (drag_window);
}
/* Drag Contexts */
static GdkDragContext *
gdk_drag_context_new (GdkDisplay *display)
{
GdkWin32DragContext *context_win32;
GdkWin32Display *win32_display = GDK_WIN32_DISPLAY (display);
GdkDragContext *context;
context_win32 = g_object_new (GDK_TYPE_WIN32_DRAG_CONTEXT, NULL);
context = GDK_DRAG_CONTEXT(context_win32);
context->display = display;
gdk_drag_context_set_device (context, gdk_seat_get_pointer (gdk_display_get_default_seat (display)));
if (win32_display->has_fixed_scale)
context_win32->scale = win32_display->window_scale;
else
context_win32->scale = _gdk_win32_display_get_monitor_scale_factor (win32_display, NULL, NULL, NULL);
context_win32->droptarget_format_target_map = g_array_new (FALSE, FALSE, sizeof (GdkSelTargetFormat));
return context;
}
static GdkDragContext *
gdk_drag_context_find (gboolean is_source,
GdkWindow *source,
GdkWindow *dest)
{
GList *tmp_list = contexts;
GdkDragContext *context;
while (tmp_list)
{
context = (GdkDragContext *)tmp_list->data;
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]);
typedef struct {
IDropTarget idt;
GdkDragContext *context;
gint ref_count;
GdkWindow *dest_window;
} target_drag_context;
typedef struct {
IDropSource ids;
GdkDragContext *context;
gint ref_count;
} source_drag_context;
typedef struct {
IDataObject ido;
int ref_count;
GdkDragContext *context;
GArray *formats;
} data_object;
typedef struct {
IEnumFORMATETC ief;
int ref_count;
int ix;
data_object *dataobj;
} enum_formats;
static source_drag_context *pending_src_context = NULL;
static source_drag_context *current_src_context = NULL;
static data_object *current_src_object = NULL;
static enum_formats *enum_formats_new (data_object *dataobj);
/* 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;
int ref_count = ++ctx->ref_count;
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 ", 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;
int ref_count = --ctx->ref_count;
GDK_NOTE (DND, g_print ("idroptarget_release %p %d\n", This, ref_count));
if (ref_count == 0)
{
g_object_unref (ctx->context);
g_clear_object (&ctx->dest_window);
g_free (This);
}
return ref_count;
}
static GdkDragAction
get_suggested_action (DWORD grfKeyState)
{
GdkWin32Selection *sel_win32 = _gdk_win32_selection_get ();
/* 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;
else if (sel_win32->dnd_source_state == GDK_WIN32_DND_DRAGGING)
return GDK_ACTION_MOVE;
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 (GdkDisplay *display)
{
g_main_context_iteration (NULL, FALSE);
while (_gdk_event_queue_find_first (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 GdkDragAction
action_for_drop_effect (DWORD effect)
{
switch (effect)
{
case DROPEFFECT_MOVE:
return GDK_ACTION_MOVE;
case DROPEFFECT_LINK:
return GDK_ACTION_LINK;
case DROPEFFECT_COPY:
return GDK_ACTION_COPY;
default:
return 0;
}
}
static void
dnd_event_put (GdkEventType type,
GdkDragContext *context,
gint pt_x,
gint pt_y,
gboolean to_dest_window)
{
GdkEvent *e;
e = gdk_event_new (type);
if (to_dest_window)
g_set_object (&e->dnd.window, context->dest_window);
else
g_set_object (&e->dnd.window, context->source_window);
e->dnd.send_event = FALSE;
g_set_object (&e->dnd.context, context);
e->dnd.time = GDK_CURRENT_TIME;
e->dnd.x_root = pt_x;
e->dnd.y_root = pt_y;
gdk_event_set_device (e, gdk_drag_context_get_device (context));
gdk_event_set_seat (e, gdk_device_get_seat (gdk_drag_context_get_device (context)));
GDK_NOTE (EVENTS, _gdk_win32_print_event (e));
gdk_event_put (e);
gdk_event_free (e);
}
static GdkContentFormats *
query_targets (LPDATAOBJECT pDataObj,
GArray *format_target_map)
{
IEnumFORMATETC *pfmt = NULL;
FORMATETC fmt;
GList *result = NULL;
HRESULT hr;
GdkContentFormatsBuilder *builder;
GdkContentFormats *result_formats;
GList *p;
if ((LPDATAOBJECT) current_src_object == pDataObj)
return gdk_content_formats_ref (current_src_object->context->formats);
hr = IDataObject_EnumFormatEtc (pDataObj, DATADIR_GET, &pfmt);
if (SUCCEEDED (hr))
hr = IEnumFORMATETC_Next (pfmt, 1, &fmt, NULL);
while (SUCCEEDED (hr) && hr != S_FALSE)
{
gboolean is_predef;
gchar *registered_name = _gdk_win32_get_clipboard_format_name (fmt.cfFormat, &is_predef);
if (registered_name && is_predef)
GDK_NOTE (DND, g_print ("supported built-in source format 0x%x %s\n", fmt.cfFormat, registered_name));
else if (registered_name)
GDK_NOTE (DND, g_print ("supported source format 0x%x %s\n", fmt.cfFormat, registered_name));
else
GDK_NOTE (DND, g_print ("supported unnamed? source format 0x%x\n", fmt.cfFormat));
g_free (registered_name);
_gdk_win32_add_format_to_targets (fmt.cfFormat, format_target_map, &result);
hr = IEnumFORMATETC_Next (pfmt, 1, &fmt, NULL);
}
if (pfmt)
IEnumFORMATETC_Release (pfmt);
builder = gdk_content_formats_builder_new ();
for (p = g_list_reverse (result); p; p = p->next)
gdk_content_formats_builder_add_mime_type (builder, (const gchar *) p->data);
result_formats = gdk_content_formats_builder_free (builder);
g_list_free (result);
return result_formats;
}
static void
set_data_object (LPDATAOBJECT *location, LPDATAOBJECT data_object)
{
if (*location != NULL)
IDataObject_Release (*location);
*location = data_object;
if (*location != NULL)
IDataObject_AddRef (*location);
}
static HRESULT STDMETHODCALLTYPE
idroptarget_dragenter (LPDROPTARGET This,
LPDATAOBJECT pDataObj,
DWORD grfKeyState,
POINTL pt,
LPDWORD pdwEffect)
{
target_drag_context *ctx = (target_drag_context *) This;
GdkWin32Selection *sel_win32 = _gdk_win32_selection_get ();
GdkDragContext *context;
GdkWin32DragContext *context_win32;
gint pt_x;
gint pt_y;
GDK_NOTE (DND, g_print ("idroptarget_dragenter %p @ %ld : %ld for dest window 0x%p S_OK\n", This, pt.x, pt.y, ctx->dest_window));
g_clear_object (&ctx->context);
context = gdk_drag_context_new (gdk_window_get_display (ctx->dest_window));
context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
ctx->context = context;
g_set_object (&context->dest_window, ctx->dest_window);
context->protocol = GDK_DRAG_PROTO_OLE2;
context->is_source = FALSE;
context->source_window = NULL;
/* OLE2 DnD does not allow us to get the source window,
* but we *can* find it if it's ours. This is needed to
* support DnD within the same widget, for example.
*/
if (current_src_context && current_src_context->context)
g_set_object (&context->source_window, current_src_context->context->source_window);
else
g_set_object (&context->source_window, NULL); /* FIXME: Root window used to be here. Find a substitute? */
g_set_object (&sel_win32->target_drag_context, context);
context->actions = GDK_ACTION_DEFAULT | GDK_ACTION_COPY | GDK_ACTION_MOVE;
context->suggested_action = GDK_ACTION_MOVE;
context->action = GDK_ACTION_MOVE;
g_array_set_size (context_win32->droptarget_format_target_map, 0);
context->formats = query_targets (pDataObj, context_win32->droptarget_format_target_map);
ctx->context->suggested_action = get_suggested_action (grfKeyState);
set_data_object (&sel_win32->dnd_data_object_target, pDataObj);
pt_x = pt.x / context_win32->scale + _gdk_offset_x;
pt_y = pt.y / context_win32->scale + _gdk_offset_y;
dnd_event_put (GDK_DRAG_ENTER, ctx->context, pt_x, pt_y, TRUE);
dnd_event_put (GDK_DRAG_MOTION, ctx->context, pt_x, pt_y, TRUE);
context_win32->last_key_state = grfKeyState;
context_win32->last_x = pt_x;
context_win32->last_y = pt_y;
process_pending_events (gdk_device_get_display (gdk_drag_context_get_device (ctx->context)));
*pdwEffect = drop_effect_for_action (ctx->context->action);
GDK_NOTE (DND, g_print ("idroptarget_dragenter returns with action %d and drop effect %lu\n", ctx->context->action, *pdwEffect));
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_dragover (LPDROPTARGET This,
DWORD grfKeyState,
POINTL pt,
LPDWORD pdwEffect)
{
target_drag_context *ctx = (target_drag_context *) This;
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (ctx->context);
gint pt_x = pt.x / context_win32->scale + _gdk_offset_x;
gint pt_y = pt.y / context_win32->scale + _gdk_offset_y;
ctx->context->suggested_action = get_suggested_action (grfKeyState);
GDK_NOTE (DND, g_print ("idroptarget_dragover %p @ %ld : %ld, suggests %d action S_OK\n", This, pt.x, pt.y, ctx->context->suggested_action));
if (pt_x != context_win32->last_x ||
pt_y != context_win32->last_y ||
grfKeyState != context_win32->last_key_state)
{
dnd_event_put (GDK_DRAG_MOTION, ctx->context, pt_x, pt_y, TRUE);
context_win32->last_key_state = grfKeyState;
context_win32->last_x = pt_x;
context_win32->last_y = pt_y;
}
process_pending_events (gdk_device_get_display (gdk_drag_context_get_device (ctx->context)));
*pdwEffect = drop_effect_for_action (ctx->context->action);
GDK_NOTE (DND, g_print ("idroptarget_dragover returns with action %d and effect %lu\n", ctx->context->action, *pdwEffect));
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
idroptarget_dragleave (LPDROPTARGET This)
{
target_drag_context *ctx = (target_drag_context *) This;
GdkWin32Selection *sel_win32 = _gdk_win32_selection_get ();
GDK_NOTE (DND, g_print ("idroptarget_dragleave %p S_OK\n", This));
dnd_event_put (GDK_DRAG_LEAVE, ctx->context, 0, 0, TRUE);
process_pending_events (gdk_device_get_display (gdk_drag_context_get_device (ctx->context)));
g_clear_object (&sel_win32->target_drag_context);
g_clear_object (&ctx->context);
set_data_object (&sel_win32->dnd_data_object_target, NULL);
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;
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (ctx->context);
gint pt_x = pt.x / context_win32->scale + _gdk_offset_x;
gint pt_y = pt.y / context_win32->scale + _gdk_offset_y;
GdkWin32Selection *sel_win32 = _gdk_win32_selection_get ();
GDK_NOTE (DND, g_print ("idroptarget_drop %p ", This));
if (pDataObj == NULL)
{
GDK_NOTE (DND, g_print ("E_POINTER\n"));
g_clear_object (&ctx->context);
return E_POINTER;
}
ctx->context->suggested_action = get_suggested_action (grfKeyState);
dnd_event_put (GDK_DROP_START, ctx->context, pt_x, pt_y, TRUE);
process_pending_events (gdk_device_get_display (gdk_drag_context_get_device (ctx->context)));
/* Notify OLE of copy or move */
if (sel_win32->dnd_target_state != GDK_WIN32_DND_DROPPED)
*pdwEffect = DROPEFFECT_NONE;
else
*pdwEffect = drop_effect_for_action (ctx->context->action);
g_clear_object (&sel_win32->target_drag_context);
g_clear_object (&ctx->context);
set_data_object (&sel_win32->dnd_data_object_target, NULL);
GDK_NOTE (DND, g_print ("drop S_OK with effect %lx\n", *pdwEffect));
return S_OK;
}
static ULONG STDMETHODCALLTYPE
idropsource_addref (LPDROPSOURCE This)
{
source_drag_context *ctx = (source_drag_context *) This;
int ref_count = ++ctx->ref_count;
GDK_NOTE (DND, g_print ("idropsource_addref %p %d\n", This, ref_count));
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;
int ref_count = --ctx->ref_count;
GDK_NOTE (DND, g_print ("idropsource_release %p %d\n", This, ref_count));
if (ref_count == 0)
{
g_clear_object (&ctx->context);
if (current_src_context == ctx)
current_src_context = NULL;
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 *context,
DWORD key_state,
gboolean esc_pressed)
{
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
POINT pt;
POINT pt_client;
gboolean changed = FALSE;
HWND hwnd = GDK_WINDOW_HWND (context->source_window);
LPARAM lparam;
WPARAM wparam;
gint pt_x;
gint pt_y;
if (!API_CALL (GetCursorPos, (&pt)))
return FALSE;
pt_client = pt;
if (!API_CALL (ScreenToClient, (hwnd, &pt_client)))
return FALSE;
pt_x = pt.x / context_win32->scale + _gdk_offset_x;
pt_y = pt.y / context_win32->scale + _gdk_offset_y;
if (pt_x != context_win32->last_x || pt_y != context_win32->last_y ||
key_state != context_win32->last_key_state)
{
lparam = MAKELPARAM (pt_client.x, pt_client.y);
wparam = key_state;
if (pt_x != context_win32->last_x || pt_y != context_win32->last_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) != (context_win32->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) != (context_win32->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) != (context_win32->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) != (context_win32->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) != (context_win32->last_key_state & MK_SHIFT))
{
if (key_state & MK_SHIFT)
SendMessage (hwnd, WM_KEYDOWN, VK_SHIFT, 0);
else
SendMessage (hwnd, WM_KEYUP, VK_SHIFT, 0);
}
changed = TRUE;
context_win32->last_key_state = key_state;
context_win32->last_x = pt_x;
context_win32->last_y = pt_y;
}
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;
GdkWin32Selection *sel_win32 = _gdk_win32_selection_get ();
GDK_NOTE (DND, g_print ("idropsource_querycontinuedrag %p esc=%d keystate=0x%lx with state %d", This, fEscapePressed, grfKeyState, sel_win32->dnd_source_state));
if (send_change_events (ctx->context, grfKeyState, fEscapePressed))
process_pending_events (gdk_device_get_display (gdk_drag_context_get_device (ctx->context)));
if (sel_win32->dnd_source_state == GDK_WIN32_DND_DROPPED)
{
GDK_NOTE (DND, g_print ("DRAGDROP_S_DROP\n"));
return DRAGDROP_S_DROP;
}
else if (sel_win32->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;
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (ctx->context);
GdkDragAction suggested_action;
GdkEvent *e;
POINT pt;
GDK_NOTE (DND, g_print ("idropsource_givefeedback %p with drop effect %lu S_OK\n", This, dwEffect));
if (!API_CALL (GetCursorPos, (&pt)))
return S_OK;
suggested_action = action_for_drop_effect (dwEffect);
ctx->context->action = suggested_action;
if (dwEffect == DROPEFFECT_NONE)
g_clear_object (&ctx->context->dest_window);
else if (ctx->context->dest_window == NULL)
ctx->context->dest_window = NULL; /* FIXME: Root window was here originally. Find a substitute? */
context_win32->last_x = pt.x / context_win32->scale + _gdk_offset_x;
context_win32->last_y = pt.y / context_win32->scale + _gdk_offset_y;
e = gdk_event_new (GDK_DRAG_STATUS);
g_set_object (&e->dnd.window, ctx->context->source_window);
e->dnd.send_event = FALSE;
g_set_object (&e->dnd.context, ctx->context);
e->dnd.time = GDK_CURRENT_TIME;
e->dnd.x_root = context_win32->last_x;
e->dnd.y_root = context_win32->last_y;
gdk_event_set_device (e, gdk_drag_context_get_device (ctx->context));
gdk_event_set_seat (e, gdk_device_get_seat (gdk_drag_context_get_device (ctx->context)));
GDK_NOTE (EVENTS, _gdk_win32_print_event (e));
gdk_event_put (e);
gdk_event_free (e);
process_pending_events (gdk_device_get_display (gdk_drag_context_get_device (ctx->context)));
GDK_NOTE (DND, g_print ("idropsource_givefeedback %p returns\n", This));
return S_OK;
}
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_array_free (dobj->formats, TRUE);
g_free (This);
}
return ref_count;
}
static HRESULT
query (LPDATAOBJECT This,
LPFORMATETC pFormatEtc)
{
data_object *ctx = (data_object *) This;
gint 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 < ctx->formats->len; i++)
if (pFormatEtc->cfFormat == g_array_index (ctx->formats, GdkSelTargetFormat, i).format)
return S_OK;
return DV_E_FORMATETC;
}
static HRESULT STDMETHODCALLTYPE
idataobject_getdata (LPDATAOBJECT This,
LPFORMATETC pFormatEtc,
LPSTGMEDIUM pMedium)
{
data_object *ctx = (data_object *) This;
GdkWin32Selection *win32_sel = _gdk_win32_selection_get ();
HRESULT hr;
GdkEvent e;
gint i;
GdkAtom target;
gint64 loopend;
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)
{
GDK_NOTE (DND, g_print ("Unsupported format, returning 0x%lx\n", hr));
return hr;
}
/* Append a GDK_SELECTION_REQUEST event and then hope the app sets the
* property associated with the _gdk_ole2_dnd atom
*/
win32_sel->property_change_format = pFormatEtc->cfFormat;
win32_sel->property_change_data = pMedium;
for (i = 0, target = NULL; i < ctx->formats->len; i++)
{
GdkSelTargetFormat *frec = &g_array_index (ctx->formats, GdkSelTargetFormat, i);
if (frec->format == pFormatEtc->cfFormat)
{
target = frec->target;
win32_sel->property_change_transmute = frec->transmute;
win32_sel->property_change_target_atom = frec->target;
}
}
if (target == NULL)
{
GDK_NOTE (EVENTS, g_print ("(target not found)"));
return E_UNEXPECTED;
}
GDK_NOTE (DND, {
gchar *target_name = gdk_atom_name (target);
g_print ("idataobject_getdata will request target 0x%p (%s) ",
target, target_name);
g_free (target_name);
});
memset (&e, 0, sizeof (GdkEvent));
e.type = GDK_SELECTION_REQUEST;
g_set_object (&e.selection.window, ctx->context->source_window);
e.selection.send_event = FALSE; /* ??? */
/* Both selection and property are OLE2_DND, because change_property()
* will only get the property and not the selection. Theoretically we
* could use two different atoms (SELECTION_OLE2_DND and PROPERTY_OLE2_DND),
* but there's little reason to do so.
*/
e.selection.selection = _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_OLE2_DND);
e.selection.target = target;
/* Requestor here is fake, just to allow the event to be processed */
g_set_object (&e.selection.requestor, ctx->context->source_window);
e.selection.property = _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_OLE2_DND);
e.selection.time = GDK_CURRENT_TIME;
GDK_NOTE (EVENTS, _gdk_win32_print_event (&e));
gdk_event_put (&e);
/* Don't hold up longer than one second */
loopend = g_get_monotonic_time () + 1000000000;
while (win32_sel->property_change_data != 0 &&
g_get_monotonic_time () < loopend)
process_pending_events (gdk_device_get_display (gdk_drag_context_get_device (ctx->context)));
if (pMedium->hGlobal == NULL) {
GDK_NOTE (DND, g_print (" E_UNEXPECTED\n"));
return E_UNEXPECTED;
}
GDK_NOTE (DND, g_print (" S_OK\n"));
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 "\n"); break
GDK_NOTE (DND, {
g_print ("idataobject_querygetdata %p %s ",
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 ((data_object *) This)->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)
{
idataobject_release ((LPDATAOBJECT) en->dataobj);
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;
ULONG i, n;
ULONG formats_to_get = celt;
GDK_NOTE (DND, g_print ("ienumformatetc_next %p %d %ld ", This, en->ix, celt));
n = 0;
for (i = 0; i < formats_to_get; i++)
{
UINT fmt;
if (en->ix >= en->dataobj->formats->len)
break;
fmt = g_array_index (en->dataobj->formats, GdkSelTargetFormat, en->ix++).format;
/* skip internals */
if (fmt == 0 || fmt > 0xFFFF)
{
formats_to_get += 1;
continue;
}
elts[n].cfFormat = fmt;
elts[n].ptd = NULL;
elts[n].dwAspect = DVASPECT_CONTENT;
elts[n].lindex = -1;
elts[n].tymed = TYMED_HGLOBAL;
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 (en->dataobj);
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;
result = g_new0 (target_drag_context, 1);
result->idt.lpVtbl = &idt_vtbl;
result->ref_count = 0;
result->dest_window = g_object_ref (window);
idroptarget_addref (&result->idt);
GDK_NOTE (DND, g_print ("target_context_new: %p (window %p)\n", result, result->dest_window));
return result;
}
static source_drag_context *
source_context_new (GdkWindow *window,
GdkContentFormats *formats)
{
GdkDragContext *context;
GdkWin32DragContext *context_win32;
source_drag_context *result;
context = gdk_drag_context_new (gdk_window_get_display (window));
context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
result = g_new0 (source_drag_context, 1);
result->context = context;
result->ids.lpVtbl = &ids_vtbl;
result->ref_count = 0;
result->context->protocol = GDK_DRAG_PROTO_OLE2;
result->context->is_source = TRUE;
result->context->source_window = g_object_ref (window);
result->context->dest_window = NULL;
result->context->formats = gdk_content_formats_ref (formats);
idropsource_addref (&result->ids);
GDK_NOTE (DND, g_print ("source_context_new: %p (drag context %p)\n", result, result->context));
if (current_src_context == NULL)
current_src_context = result;
return result;
}
static data_object *
data_object_new (GdkDragContext *context)
{
data_object *result;
GList *p;
const char * const *mime_types;
gsize n_mime_types, i;
result = g_new0 (data_object, 1);
result->ido.lpVtbl = &ido_vtbl;
result->ref_count = 1;
result->context = context;
result->formats = g_array_new (FALSE, FALSE, sizeof (GdkSelTargetFormat));
mime_types = gdk_content_formats_get_mime_types (context->formats, &n_mime_types);
for (i = 0; i < n_mime_types; i++)
{
gint added_count = 0;
gint j;
GDK_NOTE (DND, g_print ("DataObject supports target 0x%p\n", mime_types[i]));
added_count = _gdk_win32_add_target_to_selformats (mime_types[i], result->formats);
for (j = 0; j < added_count && result->formats->len - 1 - j >= 0; j++)
GDK_NOTE (DND, g_print ("DataObject will support format 0x%x\n", g_array_index (result->formats, GdkSelTargetFormat, j).format));
}
GDK_NOTE (DND, g_print ("data_object_new: %p\n", result));
return result;
}
static enum_formats *
enum_formats_new (data_object *dataobj)
{
enum_formats *result;
result = g_new0 (enum_formats, 1);
result->ief.lpVtbl = &ief_vtbl;
result->ref_count = 1;
result->ix = 0;
result->dataobj = dataobj;
idataobject_addref ((LPDATAOBJECT) dataobj);
return result;
}
/* 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;
GdkWin32DragContext *context_win32;
GString *result;
MSG *msg = (MSG *) xev;
HANDLE hdrop;
POINT pt;
gint nfiles, i;
gchar *fileName, *linkedFile;
GPtrArray *formats;
formats = g_ptr_array_new ();
if (msg->message == WM_DROPFILES)
{
GDK_NOTE (DND, g_print ("WM_DROPFILES: %p\n", msg->hwnd));
context = gdk_drag_context_new (gdk_window_get_display (event->any.window));
context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
context->protocol = GDK_DRAG_PROTO_WIN32_DROPFILES;
context->is_source = FALSE;
context->source_window = NULL;
g_set_object (&context->dest_window, event->any.window);
/* WM_DROPFILES drops are always file names */
context->formats = gdk_content_formats_new ((const char *[2]) {
"text/uri-list",
NULL
}, 1);
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));
gdk_event_set_seat (event, gdk_device_get_seat (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 / context_win32->scale + _gdk_offset_x;
event->dnd.y_root = pt.y / context_win32->scale + _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;
}
void
_gdk_dnd_init (void)
{
CoInitializeEx (NULL, COINIT_APARTMENTTHREADED);
if (getenv ("GDK_WIN32_USE_EXPERIMENTAL_OLE2_DND"))
use_ole2_dnd = TRUE;
if (use_ole2_dnd)
{
HRESULT hr;
hr = OleInitialize (NULL);
if (! SUCCEEDED (hr))
g_error ("OleInitialize failed");
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 ();
}
CoUninitialize ();
}
/* 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);
g_set_object (&tmp_event->dnd.window, context->dest_window);
/* Pass ownership of context to the event */
tmp_event->dnd.send_event = FALSE;
g_set_object (&tmp_event->dnd.context, current_dest_drag);
tmp_event->dnd.time = GDK_CURRENT_TIME; /* FIXME? */
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (context));
gdk_event_set_seat (tmp_event, gdk_device_get_seat (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;
GdkDragContext *new_context;
GDK_NOTE (DND, g_print ("local_send_enter: context=%p current_dest_drag=%p\n",
context,
current_dest_drag));
if (current_dest_drag != NULL)
{
g_object_unref (G_OBJECT (current_dest_drag));
current_dest_drag = NULL;
}
new_context = gdk_drag_context_new (gdk_window_get_display (context->source_window));
new_context->protocol = GDK_DRAG_PROTO_LOCAL;
new_context->is_source = FALSE;
g_set_object (&new_context->source_window, context->source_window);
g_set_object (&new_context->dest_window, context->dest_window);
new_context->formats = gdk_content_formats_ref (context->formats);
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);
g_set_object (&tmp_event->dnd.window, context->dest_window);
tmp_event->dnd.send_event = FALSE;
g_set_object (&tmp_event->dnd.context, new_context);
tmp_event->dnd.time = GDK_CURRENT_TIME; /* FIXME? */
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (context));
gdk_event_set_seat (tmp_event, gdk_device_get_seat (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;
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
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))
{
GdkWin32DragContext *current_dest_drag_win32;
tmp_event = gdk_event_new (GDK_DRAG_MOTION);
g_set_object (&tmp_event->dnd.window, current_dest_drag->dest_window);
tmp_event->dnd.send_event = FALSE;
g_set_object (&tmp_event->dnd.context, current_dest_drag);
tmp_event->dnd.time = time;
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (current_dest_drag));
gdk_event_set_seat (tmp_event, gdk_device_get_seat (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;
current_dest_drag_win32 = GDK_WIN32_DRAG_CONTEXT (current_dest_drag);
current_dest_drag_win32->last_x = x_root;
current_dest_drag_win32->last_y = y_root;
context_win32->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))
{
GdkWin32DragContext *context_win32;
/* Pass ownership of context to the event */
tmp_event = gdk_event_new (GDK_DROP_START);
g_set_object (&tmp_event->dnd.window, current_dest_drag->dest_window);
tmp_event->dnd.send_event = FALSE;
g_set_object (&tmp_event->dnd.context, current_dest_drag);
tmp_event->dnd.time = GDK_CURRENT_TIME;
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (current_dest_drag));
gdk_event_set_seat (tmp_event, gdk_device_get_seat (gdk_drag_context_get_device (current_dest_drag)));
context_win32 = GDK_WIN32_DRAG_CONTEXT (current_dest_drag);
tmp_event->dnd.x_root = context_win32->last_x;
tmp_event->dnd.y_root = context_win32->last_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_clear_object (&context->dest_window);
}
}
static GdkWindow *
create_drag_window (GdkDisplay *display)
{
GdkWindow *window;
window = gdk_window_new_popup (display, &(GdkRectangle) { 0, 0, 100, 100 });
gdk_window_set_type_hint (window, GDK_WINDOW_TYPE_HINT_DND);
return window;
}
GdkDragContext *
_gdk_win32_window_drag_begin (GdkWindow *window,
GdkDevice *device,
GdkContentFormats *formats,
gint x_root,
gint y_root)
{
GdkDragContext *new_context;
GdkWin32DragContext *context_win32;
BYTE kbd_state[256];
GdkWin32Selection *sel_win32 = _gdk_win32_selection_get ();
if (!use_ole2_dnd)
{
g_return_val_if_fail (window != NULL, NULL);
new_context = gdk_drag_context_new (gdk_window_get_display (window));
new_context->is_source = TRUE;
g_set_object (&new_context->source_window, window);
new_context->formats = gdk_content_formats_ref (formats);
new_context->actions = 0;
context_win32 = GDK_WIN32_DRAG_CONTEXT (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, formats);
sel_win32->dnd_source_state = GDK_WIN32_DND_PENDING;
pending_src_context = ctx;
new_context = g_object_ref (ctx->context);
context_win32 = GDK_WIN32_DRAG_CONTEXT (new_context);
}
context_win32->start_x = x_root;
context_win32->start_y = y_root;
context_win32->last_x = context_win32->start_x;
context_win32->last_y = context_win32->start_y;
context_win32->last_key_state = 0;
API_CALL (GetKeyboardState, (kbd_state));
if (kbd_state[VK_CONTROL] & 0x80)
context_win32->last_key_state |= MK_CONTROL;
if (kbd_state[VK_SHIFT] & 0x80)
context_win32->last_key_state |= MK_SHIFT;
if (kbd_state[VK_LBUTTON] & 0x80)
context_win32->last_key_state |= MK_LBUTTON;
if (kbd_state[VK_MBUTTON] & 0x80)
context_win32->last_key_state |= MK_MBUTTON;
if (kbd_state[VK_RBUTTON] & 0x80)
context_win32->last_key_state |= MK_RBUTTON;
context_win32->drag_window = create_drag_window (gdk_window_get_display (window));
return new_context;
}
void
_gdk_win32_dnd_do_dragdrop (void)
{
GdkDragContext* drag_ctx;
data_object *dobj;
HRESULT hr;
DWORD dwEffect;
if (!use_ole2_dnd)
return;
if (pending_src_context == NULL)
return;
drag_ctx = pending_src_context->context;
dobj = data_object_new (drag_ctx);
current_src_object = dobj;
/* 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 (GDK_WIN32_MODAL_OP_DND);
hr = DoDragDrop (&dobj->ido, &pending_src_context->ids,
DROPEFFECT_COPY | DROPEFFECT_MOVE,
&dwEffect);
_gdk_win32_end_modal_call (GDK_WIN32_MODAL_OP_DND);
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)
{
GdkWin32Selection *win32_sel = _gdk_win32_selection_get ();
GdkEvent tmp_event;
memset (&tmp_event, 0, sizeof (tmp_event));
tmp_event.type = GDK_SELECTION_REQUEST;
g_set_object (&tmp_event.selection.window, drag_ctx->source_window);
tmp_event.selection.send_event = FALSE;
tmp_event.selection.selection = _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_OLE2_DND);
tmp_event.selection.target = _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_DELETE);
win32_sel->property_change_target_atom = _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_DELETE);
tmp_event.selection.property = _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_OLE2_DND);
g_set_object (&tmp_event.selection.requestor, drag_ctx->source_window);
tmp_event.selection.time = GDK_CURRENT_TIME; /* ??? */
GDK_NOTE (EVENTS, _gdk_win32_print_event (&tmp_event));
gdk_event_put (&tmp_event);
}
{
GdkEvent *tmp_event;
tmp_event = gdk_event_new (GDK_DROP_FINISHED);
g_set_object (&tmp_event->dnd.window, drag_ctx->source_window);
tmp_event->dnd.send_event = FALSE;
g_set_object (&tmp_event->dnd.context, drag_ctx);
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (drag_ctx));
gdk_event_set_seat (tmp_event, gdk_device_get_seat (gdk_drag_context_get_device (drag_ctx)));
GDK_NOTE (EVENTS, _gdk_win32_print_event (tmp_event));
gdk_event_put (tmp_event);
gdk_event_free (tmp_event);
}
current_src_object = NULL;
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,
gint x_root,
gint y_root,
GdkDragProtocol *protocol)
{
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
GdkWindow *dest_window, *dw;
find_window_enum_arg a;
a.x = x_root * context_win32->scale - _gdk_offset_x;
a.y = y_root * context_win32->scale - _gdk_offset_y;
a.ignore = drag_window ? GDK_WINDOW_HWND (drag_window) : NULL;
a.result = NULL;
GDK_NOTE (DND,
g_print ("gdk_drag_find_window_real: %p %+d%+d\n",
(drag_window ? GDK_WINDOW_HWND (drag_window) : NULL),
a.x, a.y));
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 (context->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)
{
GdkWin32DragContext *context_win32;
g_return_val_if_fail (context != NULL, FALSE);
context->actions = possible_actions;
GDK_NOTE (DND, g_print ("gdk_drag_motion: @ %+d:%+d %s suggested=%s, possible=%s\n"
" context=%p:{actions=%s,suggested=%s,action=%s}\n",
x_root, y_root,
_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)));
context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
if (context_win32->drag_window)
move_drag_window (context, x_root, y_root);
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);
context_win32->drag_status = GDK_DRAG_STATUS_DRAG;
/* Check if new destination accepts drags, and which protocol */
if (dest_window)
{
g_set_object (&context->dest_window, 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);
g_set_object (&tmp_event->dnd.window, context->source_window);
/* We use this to signal a synthetic status. Perhaps
* we should use an extra field...
*/
tmp_event->dnd.send_event = TRUE;
g_set_object (&tmp_event->dnd.context, context);
tmp_event->dnd.time = time;
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (context));
gdk_event_set_seat (tmp_event, gdk_device_get_seat (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 */
context_win32->last_x = x_root;
context_win32->last_y = y_root;
if (context->dest_window)
{
if (context_win32->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)
{
GdkWin32Selection *sel_win32 = _gdk_win32_selection_get ();
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
{
sel_win32->dnd_source_state = GDK_WIN32_DND_DROPPED;
}
}
static void
gdk_win32_drag_context_drag_abort (GdkDragContext *context,
guint32 time)
{
GdkWin32Selection *sel_win32 = _gdk_win32_selection_get ();
g_return_if_fail (context != NULL);
GDK_NOTE (DND, g_print ("gdk_drag_abort\n"));
if (use_ole2_dnd)
sel_win32->dnd_source_state = GDK_WIN32_DND_NONE;
}
/* Destination side */
static void
gdk_win32_drag_context_drag_status (GdkDragContext *context,
GdkDragAction action,
guint32 time)
{
GdkDragContext *src_context;
GdkEvent *tmp_event;
g_return_if_fail (context != NULL);
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)
{
GdkWin32DragContext *src_context_win32 = GDK_WIN32_DRAG_CONTEXT (src_context);
if (src_context_win32->drag_status == GDK_DRAG_STATUS_MOTION_WAIT)
src_context_win32->drag_status = GDK_DRAG_STATUS_DRAG;
tmp_event = gdk_event_new (GDK_DRAG_STATUS);
g_set_object (&tmp_event->dnd.window, context->source_window);
tmp_event->dnd.send_event = FALSE;
g_set_object (&tmp_event->dnd.context, src_context);
tmp_event->dnd.time = GDK_CURRENT_TIME; /* FIXME? */
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (src_context));
gdk_event_set_seat (tmp_event, gdk_device_get_seat (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)
{
GdkDragContext *src_context;
GdkEvent *tmp_event;
GdkWin32Selection *sel_win32 = _gdk_win32_selection_get ();
g_return_if_fail (context != NULL);
GDK_NOTE (DND, g_print ("gdk_drop_finish\n"));
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);
g_set_object (&tmp_event->dnd.window, src_context->source_window);
tmp_event->dnd.send_event = FALSE;
g_set_object (&tmp_event->dnd.context, src_context);
gdk_event_set_device (tmp_event, gdk_drag_context_get_device (src_context));
gdk_event_set_seat (tmp_event, gdk_device_get_seat (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)
sel_win32->dnd_target_state = GDK_WIN32_DND_DROPPED;
else
sel_win32->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 (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;
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)
{
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
return ! context_win32->drop_failed;
}
static GdkAtom
gdk_win32_drag_context_get_selection (GdkDragContext *context)
{
switch (context->protocol)
{
case GDK_DRAG_PROTO_LOCAL:
return _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_LOCAL_DND_SELECTION);
case GDK_DRAG_PROTO_WIN32_DROPFILES:
return _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_DROPFILES_DND);
case GDK_DRAG_PROTO_OLE2:
return _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_OLE2_DND);
default:
return NULL;
}
}
static void
gdk_win32_drag_context_set_cursor (GdkDragContext *context,
GdkCursor *cursor)
{
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
GDK_NOTE (DND, g_print ("gdk_drag_context_set_cursor: 0x%p 0x%p\n", context, cursor));
if (!g_set_object (&context_win32->cursor, cursor))
return;
if (context_win32->grab_seat)
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gdk_device_grab (gdk_seat_get_pointer (context_win32->grab_seat),
context_win32->ipc_window,
GDK_OWNERSHIP_APPLICATION, FALSE,
GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
cursor, GDK_CURRENT_TIME);
G_GNUC_END_IGNORE_DEPRECATIONS;
}
}
static double
ease_out_cubic (double t)
{
double p = t - 1;
return p * p * p + 1;
}
#define ANIM_TIME 500000 /* half a second */
typedef struct _GdkDragAnim GdkDragAnim;
struct _GdkDragAnim {
GdkWin32DragContext *context;
GdkFrameClock *frame_clock;
gint64 start_time;
};
static void
gdk_drag_anim_destroy (GdkDragAnim *anim)
{
g_object_unref (anim->context);
g_slice_free (GdkDragAnim, anim);
}
static gboolean
gdk_drag_anim_timeout (gpointer data)
{
GdkDragAnim *anim = data;
GdkWin32DragContext *context = anim->context;
GdkFrameClock *frame_clock = anim->frame_clock;
gint64 current_time;
double f;
double t;
if (!frame_clock)
return G_SOURCE_REMOVE;
current_time = gdk_frame_clock_get_frame_time (frame_clock);
f = (current_time - anim->start_time) / (double) ANIM_TIME;
if (f >= 1.0)
return G_SOURCE_REMOVE;
t = ease_out_cubic (f);
gdk_window_show (context->drag_window);
gdk_window_move (context->drag_window,
context->last_x + (context->start_x - context->last_x) * t - context->hot_x,
context->last_y + (context->start_y - context->last_y) * t - context->hot_y);
gdk_window_set_opacity (context->drag_window, 1.0 - f);
return G_SOURCE_CONTINUE;
}
static void
gdk_win32_drag_context_drop_done (GdkDragContext *context,
gboolean success)
{
GdkWin32DragContext *win32_context = GDK_WIN32_DRAG_CONTEXT (context);
GdkDragAnim *anim;
cairo_surface_t *win_surface;
cairo_surface_t *surface;
cairo_t *cr;
guint id;
GDK_NOTE (DND, g_print ("gdk_drag_context_drop_done: 0x%p %s\n",
context,
success ? "dropped successfully" : "dropped unsuccessfully"));
/* FIXME: This is temporary, until the code is fixed to ensure that
* gdk_drop_finish () is called by GTK.
*/
if (use_ole2_dnd)
{
GdkWin32Selection *sel_win32 = _gdk_win32_selection_get ();
if (success)
sel_win32->dnd_source_state = GDK_WIN32_DND_DROPPED;
else
sel_win32->dnd_source_state = GDK_WIN32_DND_NONE;
}
if (success)
{
gdk_window_hide (win32_context->drag_window);
return;
}
win_surface = _gdk_window_ref_cairo_surface (win32_context->drag_window);
surface = gdk_window_create_similar_surface (win32_context->drag_window,
cairo_surface_get_content (win_surface),
gdk_window_get_width (win32_context->drag_window),
gdk_window_get_height (win32_context->drag_window));
cr = cairo_create (surface);
cairo_set_source_surface (cr, win_surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (win_surface);
/*
pattern = cairo_pattern_create_for_surface (surface);
gdk_window_set_background_pattern (win32_context->drag_window, pattern);
cairo_pattern_destroy (pattern);
*/
cairo_surface_destroy (surface);
anim = g_slice_new0 (GdkDragAnim);
g_set_object (&anim->context, win32_context);
anim->frame_clock = gdk_window_get_frame_clock (win32_context->drag_window);
anim->start_time = gdk_frame_clock_get_frame_time (anim->frame_clock);
id = gdk_threads_add_timeout_full (G_PRIORITY_DEFAULT, 17,
gdk_drag_anim_timeout, anim,
(GDestroyNotify) gdk_drag_anim_destroy);
g_source_set_name_by_id (id, "[gtk+] gdk_drag_anim_timeout");
}
static gboolean
drag_context_grab (GdkDragContext *context)
{
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
GdkSeatCapabilities capabilities;
GdkSeat *seat;
GdkCursor *cursor;
if (!context_win32->ipc_window)
return FALSE;
seat = gdk_device_get_seat (gdk_drag_context_get_device (context));
capabilities = GDK_SEAT_CAPABILITY_ALL;
cursor = gdk_drag_get_cursor (context, gdk_drag_context_get_selected_action (context));
g_set_object (&context_win32->cursor, cursor);
if (gdk_seat_grab (seat, context_win32->ipc_window,
capabilities, FALSE,
context_win32->cursor, NULL, NULL, NULL) != GDK_GRAB_SUCCESS)
return FALSE;
g_set_object (&context_win32->grab_seat, seat);
/* TODO: Should be grabbing keys here, to support keynav. SetWindowsHookEx()? */
return TRUE;
}
static void
drag_context_ungrab (GdkDragContext *context)
{
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
if (!context_win32->grab_seat)
return;
gdk_seat_ungrab (context_win32->grab_seat);
g_clear_object (&context_win32->grab_seat);
/* TODO: Should be ungrabbing keys here */
}
static gboolean
gdk_win32_drag_context_manage_dnd (GdkDragContext *context,
GdkWindow *ipc_window,
GdkDragAction actions)
{
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
if (context_win32->ipc_window)
return FALSE;
if (use_ole2_dnd)
context->protocol = GDK_DRAG_PROTO_OLE2;
else
context->protocol = GDK_DRAG_PROTO_LOCAL;
g_set_object (&context_win32->ipc_window, ipc_window);
if (drag_context_grab (context))
{
context_win32->actions = actions;
move_drag_window (context, context_win32->start_x, context_win32->start_y);
return TRUE;
}
else
{
g_clear_object (&context_win32->ipc_window);
return FALSE;
}
}
static void
gdk_win32_drag_context_cancel (GdkDragContext *context,
GdkDragCancelReason reason)
{
const gchar *reason_str = NULL;
switch (reason)
{
case GDK_DRAG_CANCEL_NO_TARGET:
reason_str = "no target";
break;
case GDK_DRAG_CANCEL_USER_CANCELLED:
reason_str = "user cancelled";
break;
case GDK_DRAG_CANCEL_ERROR:
reason_str = "error";
break;
default:
reason_str = "<unknown>";
break;
}
GDK_NOTE (DND, g_print ("gdk_drag_context_cancel: 0x%p %s\n",
context,
reason_str));
drag_context_ungrab (context);
gdk_drag_drop_done (context, FALSE);
}
static void
gdk_win32_drag_context_drop_performed (GdkDragContext *context,
guint32 time_)
{
GDK_NOTE (DND, g_print ("gdk_drag_context_drop_performed: 0x%p %u\n",
context,
time_));
gdk_drag_drop (context, time_);
drag_context_ungrab (context);
}
#define BIG_STEP 20
#define SMALL_STEP 1
static void
gdk_drag_get_current_actions (GdkModifierType state,
gint button,
GdkDragAction actions,
GdkDragAction *suggested_action,
GdkDragAction *possible_actions)
{
*suggested_action = 0;
*possible_actions = 0;
if ((button == GDK_BUTTON_MIDDLE || button == GDK_BUTTON_SECONDARY) && (actions & GDK_ACTION_ASK))
{
*suggested_action = GDK_ACTION_ASK;
*possible_actions = actions;
}
else if (state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK))
{
if ((state & GDK_SHIFT_MASK) && (state & GDK_CONTROL_MASK))
{
if (actions & GDK_ACTION_LINK)
{
*suggested_action = GDK_ACTION_LINK;
*possible_actions = GDK_ACTION_LINK;
}
}
else if (state & GDK_CONTROL_MASK)
{
if (actions & GDK_ACTION_COPY)
{
*suggested_action = GDK_ACTION_COPY;
*possible_actions = GDK_ACTION_COPY;
}
}
else
{
if (actions & GDK_ACTION_MOVE)
{
*suggested_action = GDK_ACTION_MOVE;
*possible_actions = GDK_ACTION_MOVE;
}
}
}
else
{
*possible_actions = actions;
if ((state & (GDK_MOD1_MASK)) && (actions & GDK_ACTION_ASK))
*suggested_action = GDK_ACTION_ASK;
else if (actions & GDK_ACTION_COPY)
*suggested_action = GDK_ACTION_COPY;
else if (actions & GDK_ACTION_MOVE)
*suggested_action = GDK_ACTION_MOVE;
else if (actions & GDK_ACTION_LINK)
*suggested_action = GDK_ACTION_LINK;
}
}
static void
gdk_drag_update (GdkDragContext *context,
gdouble x_root,
gdouble y_root,
GdkModifierType mods,
guint32 evtime)
{
GdkWin32DragContext *win32_context = GDK_WIN32_DRAG_CONTEXT (context);
GdkDragAction action, possible_actions;
GdkWindow *dest_window;
GdkDragProtocol protocol;
gdk_drag_get_current_actions (mods, GDK_BUTTON_PRIMARY, win32_context->actions,
&action, &possible_actions);
gdk_drag_find_window (context,
win32_context->drag_window,
x_root, y_root, &dest_window, &protocol);
gdk_drag_motion (context, dest_window, protocol, x_root, y_root,
action, possible_actions, evtime);
}
static gboolean
gdk_dnd_handle_motion_event (GdkDragContext *context,
const GdkEventMotion *event)
{
GdkModifierType state;
if (!gdk_event_get_state ((GdkEvent *) event, &state))
return FALSE;
GDK_NOTE (DND, g_print ("gdk_dnd_handle_motion_event: 0x%p\n",
context));
gdk_drag_update (context, event->x_root, event->y_root, state,
gdk_event_get_time ((GdkEvent *) event));
return TRUE;
}
static gboolean
gdk_dnd_handle_key_event (GdkDragContext *context,
const GdkEventKey *event)
{
GdkWin32DragContext *win32_context = GDK_WIN32_DRAG_CONTEXT (context);
GdkModifierType state;
GdkWindow *root_window;
GdkDevice *pointer;
gint dx, dy;
GDK_NOTE (DND, g_print ("gdk_dnd_handle_key_event: 0x%p\n",
context));
dx = dy = 0;
state = event->state;
pointer = gdk_device_get_associated_device (gdk_event_get_device ((GdkEvent *) event));
if (event->type == GDK_KEY_PRESS)
{
switch (event->keyval)
{
case GDK_KEY_Escape:
gdk_drag_context_cancel (context, GDK_DRAG_CANCEL_USER_CANCELLED);
return TRUE;
case GDK_KEY_space:
case GDK_KEY_Return:
case GDK_KEY_ISO_Enter:
case GDK_KEY_KP_Enter:
case GDK_KEY_KP_Space:
if ((gdk_drag_context_get_selected_action (context) != 0) &&
(gdk_drag_context_get_dest_window (context) != NULL))
{
g_signal_emit_by_name (context, "drop-performed",
gdk_event_get_time ((GdkEvent *) event));
}
else
gdk_drag_context_cancel (context, GDK_DRAG_CANCEL_NO_TARGET);
return TRUE;
case GDK_KEY_Up:
case GDK_KEY_KP_Up:
dy = (state & GDK_MOD1_MASK) ? -BIG_STEP : -SMALL_STEP;
break;
case GDK_KEY_Down:
case GDK_KEY_KP_Down:
dy = (state & GDK_MOD1_MASK) ? BIG_STEP : SMALL_STEP;
break;
case GDK_KEY_Left:
case GDK_KEY_KP_Left:
dx = (state & GDK_MOD1_MASK) ? -BIG_STEP : -SMALL_STEP;
break;
case GDK_KEY_Right:
case GDK_KEY_KP_Right:
dx = (state & GDK_MOD1_MASK) ? BIG_STEP : SMALL_STEP;
break;
}
}
/* The state is not yet updated in the event, so we need
* to query it here.
*/
_gdk_device_query_state (pointer, NULL, NULL, NULL, NULL, NULL, NULL, &state);
if (dx != 0 || dy != 0)
{
win32_context->last_x += dx;
win32_context->last_y += dy;
gdk_device_warp (pointer, win32_context->last_x, win32_context->last_y);
}
gdk_drag_update (context, win32_context->last_x, win32_context->last_y, state,
gdk_event_get_time ((GdkEvent *) event));
return TRUE;
}
static gboolean
gdk_dnd_handle_grab_broken_event (GdkDragContext *context,
const GdkEventGrabBroken *event)
{
GdkWin32DragContext *win32_context = GDK_WIN32_DRAG_CONTEXT (context);
GDK_NOTE (DND, g_print ("gdk_dnd_handle_grab_broken_event: 0x%p\n",
context));
/* Don't cancel if we break the implicit grab from the initial button_press.
* Also, don't cancel if we re-grab on the widget or on our IPC window, for
* example, when changing the drag cursor.
*/
if (event->implicit ||
event->grab_window == win32_context->drag_window ||
event->grab_window == win32_context->ipc_window)
return FALSE;
if (gdk_event_get_device ((GdkEvent *) event) !=
gdk_drag_context_get_device (context))
return FALSE;
gdk_drag_context_cancel (context, GDK_DRAG_CANCEL_ERROR);
return TRUE;
}
static gboolean
gdk_dnd_handle_button_event (GdkDragContext *context,
const GdkEventButton *event)
{
GDK_NOTE (DND, g_print ("gdk_dnd_handle_button_event: 0x%p\n",
context));
#if 0
/* FIXME: Check the button matches */
if (event->button != win32_context->button)
return FALSE;
#endif
if ((gdk_drag_context_get_selected_action (context) != 0) &&
(gdk_drag_context_get_dest_window (context) != NULL))
{
g_signal_emit_by_name (context, "drop-performed",
gdk_event_get_time ((GdkEvent *) event));
}
else
gdk_drag_context_cancel (context, GDK_DRAG_CANCEL_NO_TARGET);
return TRUE;
}
gboolean
gdk_dnd_handle_drag_status (GdkDragContext *context,
const GdkEventDND *event)
{
GdkWin32DragContext *context_win32 = GDK_WIN32_DRAG_CONTEXT (context);
GdkDragAction action;
GDK_NOTE (DND, g_print ("gdk_dnd_handle_drag_status: 0x%p\n",
context));
if (context != event->context)
return FALSE;
action = gdk_drag_context_get_selected_action (context);
if (action != context_win32->current_action)
{
context_win32->current_action = action;
g_signal_emit_by_name (context, "action-changed", action);
}
return TRUE;
}
static gboolean
gdk_dnd_handle_drop_finished (GdkDragContext *context,
const GdkEventDND *event)
{
GdkWin32DragContext *win32_context = GDK_WIN32_DRAG_CONTEXT (context);
GDK_NOTE (DND, g_print ("gdk_dnd_handle_drop_finihsed: 0x%p\n",
context));
if (context != event->context)
return FALSE;
g_signal_emit_by_name (context, "dnd-finished");
gdk_drag_drop_done (context, !win32_context->drop_failed);
gdk_win32_selection_clear_targets (gdk_display_get_default (),
gdk_win32_drag_context_get_selection (context));
return TRUE;
}
gboolean
gdk_win32_drag_context_handle_event (GdkDragContext *context,
const GdkEvent *event)
{
GdkWin32DragContext *win32_context = GDK_WIN32_DRAG_CONTEXT (context);
if (!context->is_source)
return FALSE;
if (!win32_context->grab_seat && event->type != GDK_DROP_FINISHED)
return FALSE;
switch (event->type)
{
case GDK_MOTION_NOTIFY:
return gdk_dnd_handle_motion_event (context, &event->motion);
case GDK_BUTTON_RELEASE:
return gdk_dnd_handle_button_event (context, &event->button);
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
return gdk_dnd_handle_key_event (context, &event->key);
case GDK_GRAB_BROKEN:
return gdk_dnd_handle_grab_broken_event (context, &event->grab_broken);
case GDK_DRAG_STATUS:
return gdk_dnd_handle_drag_status (context, &event->dnd);
case GDK_DROP_FINISHED:
return gdk_dnd_handle_drop_finished (context, &event->dnd);
default:
break;
}
return FALSE;
}
void
gdk_win32_drag_context_action_changed (GdkDragContext *context,
GdkDragAction action)
{
GdkCursor *cursor;
cursor = gdk_drag_get_cursor (context, action);
gdk_drag_context_set_cursor (context, cursor);
}
static GdkWindow *
gdk_win32_drag_context_get_drag_window (GdkDragContext *context)
{
return GDK_WIN32_DRAG_CONTEXT (context)->drag_window;
}
static void
gdk_win32_drag_context_set_hotspot (GdkDragContext *context,
gint hot_x,
gint hot_y)
{
GdkWin32DragContext *win32_context = GDK_WIN32_DRAG_CONTEXT (context);
GDK_NOTE (DND, g_print ("gdk_drag_context_set_hotspot: 0x%p %d:%d\n",
context,
hot_x, hot_y));
win32_context->hot_x = hot_x;
win32_context->hot_y = hot_y;
if (win32_context->grab_seat)
{
/* DnD is managed, update current position */
move_drag_window (context, win32_context->last_x, win32_context->last_y);
}
}
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);
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;
context_class->get_drag_window = gdk_win32_drag_context_get_drag_window;
context_class->set_hotspot = gdk_win32_drag_context_set_hotspot;
context_class->drop_done = gdk_win32_drag_context_drop_done;
context_class->manage_dnd = gdk_win32_drag_context_manage_dnd;
context_class->set_cursor = gdk_win32_drag_context_set_cursor;
context_class->cancel = gdk_win32_drag_context_cancel;
context_class->drop_performed = gdk_win32_drag_context_drop_performed;
context_class->handle_event = gdk_win32_drag_context_handle_event;
context_class->action_changed = gdk_win32_drag_context_action_changed;
}
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