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gtk2/gdk/win32/gdkdrop-win32.c
Benjamin Otte 316bd6a333 dnd: Add gdk_drop_finish() 
and move the vfunc into GdkDrop.
2018-06-18 23:49:20 +02:00

1266 lines
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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 2001 Archaeopteryx Software Inc.
* Copyright (C) 1998-2002 Tor Lillqvist
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, 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>
/* 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 "gdkdeviceprivate.h"
#include "gdkhdataoutputstream-win32.h"
#include <ole2.h>
#include <shlobj.h>
#include <shlguid.h>
#include <objidl.h>
#include "gdkintl.h"
#include <gdk/gdk.h>
#include <glib/gstdio.h>
typedef struct
{
IDropTarget idt;
gint ref_count;
GdkDragContext *context;
/* We get this at the object creation time and keep
* it indefinitely. Contexts come and go, but this window
* remains the same.
*/
GdkSurface *dest_surface;
/* This is given to us by the OS, we store it here
* until the drag leaves our window.
*/
IDataObject *data_object;
} target_drag_context;
static GList *dnd_target_contexts;
static GdkDragContext *current_dest_drag = NULL;
static gboolean use_ole2_dnd = TRUE;
G_DEFINE_TYPE (GdkWin32DropContext, gdk_win32_drop_context, GDK_TYPE_DRAG_CONTEXT)
static void
gdk_win32_drop_context_init (GdkWin32DropContext *context)
{
if (!use_ole2_dnd)
{
dnd_target_contexts = g_list_prepend (dnd_target_contexts, context);
}
else
{
}
GDK_NOTE (DND, g_print ("gdk_drop_context_init %p\n", context));
}
static void
gdk_win32_drop_context_finalize (GObject *object)
{
GdkDragContext *context;
GdkWin32DropContext *context_win32;
GDK_NOTE (DND, g_print ("gdk_drop_context_finalize %p\n", object));
g_return_if_fail (GDK_IS_WIN32_DROP_CONTEXT (object));
context = GDK_DRAG_CONTEXT (object);
context_win32 = GDK_WIN32_DROP_CONTEXT (context);
if (!use_ole2_dnd)
{
dnd_target_contexts = g_list_remove (dnd_target_contexts, context);
if (context == current_dest_drag)
current_dest_drag = NULL;
}
g_clear_object (&context_win32->local_source_context);
g_array_unref (context_win32->droptarget_w32format_contentformat_map);
G_OBJECT_CLASS (gdk_win32_drop_context_parent_class)->finalize (object);
}
/* Drag Contexts */
static GdkDragContext *
gdk_drop_context_new (GdkDisplay *display,
GdkSurface *source_surface,
GdkSurface *dest_surface,
GdkContentFormats *formats,
GdkDragAction actions,
GdkDragProtocol protocol)
{
GdkWin32DropContext *context_win32;
GdkWin32Display *win32_display = GDK_WIN32_DISPLAY (display);
GdkDragContext *context;
context_win32 = g_object_new (GDK_TYPE_WIN32_DROP_CONTEXT,
"device", gdk_seat_get_pointer (gdk_display_get_default_seat (display)),
"formats", formats,
NULL);
context = GDK_DRAG_CONTEXT (context_win32);
if (win32_display->has_fixed_scale)
context_win32->scale = win32_display->surface_scale;
else
context_win32->scale = _gdk_win32_display_get_monitor_scale_factor (win32_display, NULL, NULL, NULL);
context_win32->droptarget_w32format_contentformat_map = g_array_new (FALSE, FALSE, sizeof (GdkWin32ContentFormatPair));
context->is_source = FALSE;
g_set_object (&context->source_surface, source_surface);
g_set_object (&context->dest_surface, dest_surface);
gdk_drag_context_set_actions (context, actions, actions);
context_win32->protocol = protocol;
gdk_content_formats_unref (formats);
return context;
}
GdkDragContext *
_gdk_win32_drop_context_find (GdkSurface *source,
GdkSurface *dest)
{
GList *tmp_list = dnd_target_contexts;
GdkDragContext *context;
while (tmp_list)
{
context = (GdkDragContext *) tmp_list->data;
if (!context->is_source &&
((source == NULL) || (context->source_surface && (context->source_surface == source))) &&
((dest == NULL) || (context->dest_surface && (context->dest_surface == 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]);
/* map windows -> target drag contexts. The table
* owns a ref to each context.
*/
static GHashTable* target_ctx_for_window = NULL;
static target_drag_context *
find_droptarget_for_target_context (GdkDragContext *context)
{
return g_hash_table_lookup (target_ctx_for_window, GDK_SURFACE_HWND (context->dest_surface));
}
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_surface);
g_free (This);
}
return ref_count;
}
static GdkDragAction
get_suggested_action (GdkWin32DropContext *win32_context,
DWORD grfKeyState)
{
/* This is the yucky Windows standard: Force link action if both
* Control and Alt are down, copy if Control is down alone, move if
* Alt is down alone, or use default of move within the app or copy
* when origin of the drag is in another app.
*/
if (grfKeyState & MK_CONTROL && grfKeyState & MK_SHIFT)
return GDK_ACTION_LINK; /* Link action not supported */
else if (grfKeyState & MK_CONTROL)
return GDK_ACTION_COPY;
else if (grfKeyState & MK_ALT)
return GDK_ACTION_MOVE;
else if (win32_context->local_source_context &&
win32_context->local_source_context->util_data.state == GDK_WIN32_DND_DRAGGING)
return GDK_ACTION_MOVE;
else
return GDK_ACTION_COPY;
/* Any way to determine when to add in DROPEFFECT_SCROLL? */
}
static DWORD
drop_effect_for_action (GdkDragAction action)
{
DWORD effect = 0;
if (action & GDK_ACTION_MOVE)
effect |= DROPEFFECT_MOVE;
if (action & GDK_ACTION_LINK)
effect |= DROPEFFECT_LINK;
if (action & GDK_ACTION_COPY)
effect |= DROPEFFECT_COPY;
if (effect == 0)
effect = DROPEFFECT_NONE;
return effect;
}
static void
dnd_event_emit (GdkEventType type,
GdkDragContext *context,
gint pt_x,
gint pt_y,
GdkSurface *dnd_surface)
{
GdkEvent *e;
g_assert (_win32_main_thread == NULL ||
_win32_main_thread == g_thread_self ());
e = gdk_event_new (type);
e->any.send_event = FALSE;
g_set_object (&e->dnd.context, context);
g_set_object (&e->any.surface, dnd_surface);
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_NOTE (EVENTS, _gdk_win32_print_event (e));
_gdk_event_emit (e);
g_object_unref (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;
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_w32format_to_pairs (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_to_formats (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;
GdkDragContext *context;
GdkWin32DropContext *context_win32;
GdkDisplay *display;
gint pt_x;
gint pt_y;
GdkDragContext *source_context;
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_surface));
g_clear_object (&ctx->context);
source_context = _gdk_win32_find_source_context_for_dest_surface (ctx->dest_surface);
display = gdk_surface_get_display (ctx->dest_surface);
context = gdk_drop_context_new (display,
/* 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.
*/
source_context ? source_context->source_surface : NULL,
ctx->dest_surface,
query_targets (pDataObj, NULL),
GDK_ACTION_COPY | GDK_ACTION_MOVE,
GDK_DRAG_PROTO_OLE2);
context_win32 = GDK_WIN32_DROP_CONTEXT (context);
gdk_content_formats_unref (query_targets (pDataObj, context_win32->droptarget_w32format_contentformat_map));
g_array_set_size (context_win32->droptarget_w32format_contentformat_map, 0);
g_set_object (&context_win32->local_source_context, GDK_WIN32_DRAG_CONTEXT (source_context));
ctx->context = context;
context->action = GDK_ACTION_MOVE;
gdk_drag_context_set_actions (context,
GDK_ACTION_COPY | GDK_ACTION_MOVE,
get_suggested_action (context_win32, grfKeyState));
set_data_object (&ctx->data_object, pDataObj);
pt_x = pt.x / context_win32->scale + _gdk_offset_x;
pt_y = pt.y / context_win32->scale + _gdk_offset_y;
dnd_event_emit (GDK_DRAG_ENTER, context, pt_x, pt_y, context->dest_surface);
dnd_event_emit (GDK_DRAG_MOTION, context, pt_x, pt_y, context->dest_surface);
context_win32->last_key_state = grfKeyState;
context_win32->last_x = pt_x;
context_win32->last_y = pt_y;
*pdwEffect = drop_effect_for_action (context->action);
GDK_NOTE (DND, g_print ("idroptarget_dragenter returns with action %d and drop effect %lu\n", context->action, *pdwEffect));
return S_OK;
}
/* NOTE: This method is called continuously, even if nothing is
* happening, as long as the drag operation is in progress and
* the cursor is above our window.
* It is OK to return a "safe" dropeffect value (DROPEFFECT_NONE,
* to indicate that the drop is not possible here), when we
* do not yet have any real information about acceptability of
* the drag, because we will have another opportunity to return
* the "right" value (once we know what it is, after GTK processes
* the events we emit) very soon.
*/
static HRESULT STDMETHODCALLTYPE
idroptarget_dragover (LPDROPTARGET This,
DWORD grfKeyState,
POINTL pt,
LPDWORD pdwEffect)
{
target_drag_context *ctx = (target_drag_context *) This;
GdkWin32DropContext *context_win32 = GDK_WIN32_DROP_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;
gdk_drag_context_set_actions (ctx->context,
gdk_drag_context_get_actions (ctx->context),
get_suggested_action (context_win32, grfKeyState));
GDK_NOTE (DND, g_print ("idroptarget_dragover %p @ %d : %d (raw %ld : %ld), suggests %d action S_OK\n", This, pt_x, pt_y, pt.x, pt.y, gdk_drag_context_get_suggested_action (ctx->context)));
if (pt_x != context_win32->last_x ||
pt_y != context_win32->last_y ||
grfKeyState != context_win32->last_key_state)
{
dnd_event_emit (GDK_DRAG_MOTION, ctx->context, pt_x, pt_y, ctx->context->dest_surface);
context_win32->last_key_state = grfKeyState;
context_win32->last_x = pt_x;
context_win32->last_y = pt_y;
}
*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;
GDK_NOTE (DND, g_print ("idroptarget_dragleave %p S_OK\n", This));
dnd_event_emit (GDK_DRAG_LEAVE, ctx->context, 0, 0, ctx->context->dest_surface);
g_clear_object (&ctx->context);
set_data_object (&ctx->data_object, 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;
GdkWin32DropContext *context_win32 = GDK_WIN32_DROP_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;
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);
set_data_object (&ctx->data_object, NULL);
return E_POINTER;
}
gdk_drag_context_set_actions (ctx->context,
gdk_drag_context_get_actions (ctx->context),
get_suggested_action (context_win32, grfKeyState));
dnd_event_emit (GDK_DROP_START, ctx->context, pt_x, pt_y, ctx->context->dest_surface);
/* Notify OLE of copy or move */
*pdwEffect = drop_effect_for_action (ctx->context->action);
g_clear_object (&ctx->context);
set_data_object (&ctx->data_object, NULL);
GDK_NOTE (DND, g_print ("drop S_OK with effect %lx\n", *pdwEffect));
return S_OK;
}
static IDropTargetVtbl idt_vtbl = {
idroptarget_queryinterface,
idroptarget_addref,
idroptarget_release,
idroptarget_dragenter,
idroptarget_dragover,
idroptarget_dragleave,
idroptarget_drop
};
static target_drag_context *
target_context_new (GdkSurface *window)
{
target_drag_context *result;
result = g_new0 (target_drag_context, 1);
result->idt.lpVtbl = &idt_vtbl;
result->ref_count = 0;
result->dest_surface = g_object_ref (window);
idroptarget_addref (&result->idt);
GDK_NOTE (DND, g_print ("target_context_new: %p (window %p)\n", result, result->dest_surface));
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 GdkWin32MessageFilterReturn
gdk_dropfiles_filter (GdkWin32Display *display,
MSG *msg,
gint *ret_valp,
gpointer data)
{
GdkSurface *window;
GdkDragContext *context;
GdkWin32DropContext *context_win32;
GdkEvent *event;
GString *result;
HANDLE hdrop;
POINT pt;
gint nfiles, i;
gchar *fileName, *linkedFile;
if (msg->message != WM_DROPFILES)
return GDK_WIN32_MESSAGE_FILTER_CONTINUE;
GDK_NOTE (DND, g_print ("WM_DROPFILES: %p\n", msg->hwnd));
window = gdk_win32_handle_table_lookup (msg->hwnd);
context = gdk_drop_context_new (GDK_DISPLAY (display),
NULL,
window,
gdk_content_formats_new ((const char *[2]) {
"text/uri-list",
NULL
}, 1),
GDK_ACTION_COPY,
GDK_DRAG_PROTO_WIN32_DROPFILES);
context_win32 = GDK_WIN32_DROP_CONTEXT (context);
/* WM_DROPFILES drops are always file names */
gdk_drag_context_set_actions (context, GDK_ACTION_COPY, GDK_ACTION_COPY);
current_dest_drag = context;
hdrop = (HANDLE) msg->wParam;
DragQueryPoint (hdrop, &pt);
ClientToScreen (msg->hwnd, &pt);
event = gdk_event_new (GDK_DROP_START);
event->any.send_event = FALSE;
g_set_object (&event->dnd.context, context);
g_set_object (&event->any.surface, window);
gdk_event_set_display (event, GDK_DISPLAY (display));
gdk_event_set_device (event, gdk_drag_context_get_device (context));
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");
}
/* FIXME: this call is currently a no-op, but it should
* stash the string somewhere, and later produce it,
* maybe in response to gdk_win32_drop_context_read_async()?
*/
_gdk_dropfiles_store (result->str);
g_string_free (result, FALSE);
GDK_NOTE (EVENTS, _gdk_win32_print_event (event));
_gdk_event_emit (event);
g_object_unref (event);
DragFinish (hdrop);
gdk_display_put_event (GDK_DISPLAY (display), event);
g_object_unref (event);
*ret_valp = 0;
return GDK_WIN32_MESSAGE_FILTER_REMOVE;
}
/* Destination side */
static void
gdk_win32_drop_context_status (GdkDrop *drop,
GdkDragAction action)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (drop);
GdkDragContext *src_context;
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 (gdk_drag_context_get_actions (context)),
_gdk_win32_drag_action_to_string (gdk_drag_context_get_suggested_action (context)),
_gdk_win32_drag_action_to_string (context->action)));
context->action = action;
if (!use_ole2_dnd)
{
src_context = _gdk_win32_drag_context_find (context->source_surface,
context->dest_surface);
if (src_context)
{
_gdk_win32_drag_context_send_local_status_event (src_context, action);
}
}
}
static void
_gdk_display_put_event (GdkDisplay *display,
GdkEvent *event)
{
g_assert (_win32_main_thread == NULL ||
_win32_main_thread == g_thread_self ());
gdk_event_set_display (event, display);
gdk_display_put_event (display, event);
}
static void
gdk_win32_drop_context_finish (GdkDrop *drop,
GdkDragAction action)
{
GdkDragContext *context = GDK_DRAG_CONTEXT (drop);
GdkDragContext *src_context;
GdkWin32Clipdrop *clipdrop = _gdk_win32_clipdrop_get ();
g_return_if_fail (context != NULL);
GDK_NOTE (DND, g_print ("gdk_drag_finish\n"));
if (context->action != action)
gdk_win32_drop_context_status (context, action);
if (!use_ole2_dnd)
{
src_context = _gdk_win32_drag_context_find (context->source_surface,
context->dest_surface);
if (src_context)
{
GDK_NOTE (DND, g_print ("gdk_dnd_handle_drop_finihsed: 0x%p\n",
context));
g_signal_emit_by_name (context, "dnd-finished");
gdk_drag_drop_done (context, !GDK_WIN32_DROP_CONTEXT (context)->drop_failed);
}
}
else
{
_gdk_win32_drag_do_leave (context, GDK_CURRENT_TIME);
if (action)
clipdrop->dnd_target_state = GDK_WIN32_DND_DROPPED;
else
clipdrop->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_surface_register_dnd (GdkSurface *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_surface_register_dnd: %p\n", GDK_SURFACE_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_win32_display_add_filter (GDK_WIN32_DISPLAY (gdk_display_get_default ()), gdk_dropfiles_filter, NULL);
DragAcceptFiles (GDK_SURFACE_HWND (window), TRUE);
}
else
{
/* Return if window is already setup for DND. */
if (g_hash_table_lookup (target_ctx_for_window, GDK_SURFACE_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_SURFACE_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_SURFACE_HWND (window), ctx);
}
}
}
}
static gpointer
grab_data_from_hdata (GTask *task,
HANDLE hdata,
gsize *data_len)
{
gpointer ptr;
SIZE_T length;
guchar *data;
ptr = GlobalLock (hdata);
if (ptr == NULL)
{
DWORD error_code = GetLastError ();
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
_("Cannot get DnD data. GlobalLock(0x%p) failed: 0x%lx."), hdata, error_code);
return NULL;
}
length = GlobalSize (hdata);
if (length == 0 && GetLastError () != NO_ERROR)
{
DWORD error_code = GetLastError ();
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
_("Cannot get DnD data. GlobalSize(0x%p) failed: 0x%lx."), hdata, error_code);
GlobalUnlock (hdata);
return NULL;
}
data = g_try_malloc (length);
if (data == NULL)
{
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
_("Cannot get DnD data. Failed to allocate %lu bytes to store the data."), length);
GlobalUnlock (hdata);
return NULL;
}
memcpy (data, ptr, length);
*data_len = length;
GlobalUnlock (hdata);
return data;
}
static void
gdk_win32_drop_context_read_async (GdkDrop *drop,
GdkContentFormats *formats,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GdkWin32DropContext *context_win32 = GDK_WIN32_DROP_CONTEXT (drop);
GTask *task;
target_drag_context *tctx;
const char * const *mime_types;
gsize i, j, n_mime_types;
GdkWin32ContentFormatPair *pair;
FORMATETC fmt;
HRESULT hr;
STGMEDIUM storage;
guchar *data;
gsize data_len;
GInputStream *stream;
task = g_task_new (drop, cancellable, callback, user_data);
g_task_set_priority (task, io_priority);
g_task_set_source_tag (task, gdk_win32_drop_context_read_async);
tctx = find_droptarget_for_target_context (GDK_DRAG_CONTEXT (drop));
if (tctx == NULL)
{
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
_("Failed to find target context record for context 0x%p"), drop);
return;
}
if (tctx->data_object == NULL)
{
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
_("Target context record 0x%p has no data object"), tctx);
return;
}
mime_types = gdk_content_formats_get_mime_types (formats, &n_mime_types);
for (pair = NULL, i = 0; i < n_mime_types; i++)
{
for (j = 0; j < context_win32->droptarget_w32format_contentformat_map->len; j++)
{
pair = &g_array_index (context_win32->droptarget_w32format_contentformat_map, GdkWin32ContentFormatPair, j);
if (pair->contentformat == mime_types[i])
break;
pair = NULL;
}
}
if (pair == NULL)
{
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("No compatible transfer format found"));
return;
}
fmt.cfFormat = pair->w32format;
if (_gdk_win32_format_uses_hdata (pair->w32format))
fmt.tymed = TYMED_HGLOBAL;
else
g_assert_not_reached ();
fmt.ptd = NULL;
fmt.dwAspect = DVASPECT_CONTENT;
fmt.lindex = -1;
hr = IDataObject_GetData (tctx->data_object, &fmt, &storage);
if (!SUCCEEDED (hr) || hr != S_OK)
{
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
_("IDataObject_GetData (0x%x) failed, returning 0x%lx"), fmt.cfFormat, hr);
return;
}
if (!pair->transmute)
{
if (_gdk_win32_format_uses_hdata (pair->w32format))
{
data = grab_data_from_hdata (task, storage.hGlobal, &data_len);
if (data == NULL)
{
ReleaseStgMedium (&storage);
return;
}
}
else
{
g_assert_not_reached ();
}
}
else
{
_gdk_win32_transmute_windows_data (pair->w32format, pair->contentformat, storage.hGlobal, &data, &data_len);
}
ReleaseStgMedium (&storage);
if (data == NULL)
{
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
_("Failed to transmute DnD data W32 format 0x%x to %p (%s)"), pair->w32format, pair->contentformat, pair->contentformat);
return;
}
stream = g_memory_input_stream_new_from_data (data, data_len, g_free);
g_object_set_data (G_OBJECT (stream), "gdk-dnd-stream-contenttype", (gpointer) pair->contentformat);
g_task_return_pointer (task, stream, g_object_unref);
}
static GInputStream *
gdk_win32_drop_context_read_finish (GdkDrop *drop,
const char **out_mime_type,
GAsyncResult *result,
GError **error)
{
GTask *task;
GInputStream *stream;
g_return_val_if_fail (g_task_is_valid (result, G_OBJECT (drop)), NULL);
task = G_TASK (result);
g_return_val_if_fail (g_task_get_source_tag (task) == gdk_win32_drop_context_read_async, NULL);
stream = g_task_propagate_pointer (task, error);
if (stream && out_mime_type)
*out_mime_type = g_object_get_data (G_OBJECT (stream), "gdk-dnd-stream-contenttype");
return stream;
}
static void
gdk_win32_drop_context_class_init (GdkWin32DropContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkDropClass *drop_class = GDK_DROP_CLASS (klass);
GdkDragContextClass *context_class = GDK_DRAG_CONTEXT_CLASS (klass);
object_class->finalize = gdk_win32_drop_context_finalize;
drop_class->status = gdk_win32_drop_context_status;
drop_class->finish = gdk_win32_drop_context_finish;
drop_class->read_async = gdk_win32_drop_context_read_async;
drop_class->read_finish = gdk_win32_drop_context_read_finish;
}
void
_gdk_win32_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_drop_context_new (gdk_surface_get_display (context->source_surface),
context->source_surface,
context->dest_surface,
gdk_content_formats_ref (gdk_drag_context_get_formats (context)),
gdk_drag_context_get_actions (context),
GDK_DRAG_PROTO_LOCAL);
gdk_surface_set_events (new_context->source_surface,
gdk_surface_get_events (new_context->source_surface) |
GDK_PROPERTY_CHANGE_MASK);
tmp_event = gdk_event_new (GDK_DRAG_ENTER);
g_set_object (&tmp_event->any.surface, context->dest_surface);
tmp_event->any.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));
current_dest_drag = new_context;
GDK_NOTE (EVENTS, _gdk_win32_print_event (tmp_event));
_gdk_display_put_event (gdk_device_get_display (gdk_drag_context_get_device (context)), tmp_event);
g_object_unref (tmp_event);
}
void
_gdk_drop_init (void)
{
if (use_ole2_dnd)
{
target_ctx_for_window = g_hash_table_new (g_direct_hash, g_direct_equal);
}
}
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