Commit 8caba953 authored by LRN's avatar LRN
Browse files

W32: Massive W32 DnD fix

Massive changes to OLE2 DnD protocol, which was completely broken before:
* Keep GdkDragContext and OLE2 objects separate (don't ref/unref them
  together, don't necessarily create them together).
* Keep IDataObject formats in the object itself, not in a global variable.
* Fix getdata() to look up the request target in its format list, not in the
  global hash table
* Create target GdkDragContext on each drag_enter, destroy it on drag_leave,
  whereas IDropTarget is created when a window becomes a drag destination
  and is re-used indefinitely.
* Query the source IDataObject for its supported types, cache them in the
  target (!) context. This is how GTK+ works, honestly.
* Remember current_src_object when we initiate a drag, to be able
  to detect later on that the data object is ours and use a
  shortcut when querying targets
* Make sure GDK_DRAG_MOTION is only sent when something changes
* Support GTK drag cursors
* Ensure that exotic GTK clipboard formats are registered
  (but try to avoid registering formats that can't be used between applications).
* Don't enumerate internal formats
* Ensure that DnD indicator window can't accept drags or receive any kind of input
  (use WS_EX_TRANSPARENT).
* Remove unneeded indentation in _gdk_win32_dnd_do_dragdrop()
* Fix indentation in gdk_win32_drag_context_drop_finish()
* Remove obsolete comments in _gdk_win32_window_register_dnd()
* Check for DnD in progress when processing WM_KILLFOCUS, don't emit a grab
  break event in such cases (this allows alt-tabbing while DnD is in progress,
  though there may be lingering issues with focus after dropping...)
* Support Shell ID List -> text/uri-list conversion, now it's possible
  to drop files (dragged from Explorer) on GTK+ applications
* Explicitly use RegisterClipboardFormatA() when we know that the string
  is not in unicode. Otherwise explicitly use RegisterClipboardFormatW()
  with a UTF8->UTF16 converted string
* Fix _gdk_win32_display_get_selection_owner() to correctly bail
  when selection owner HWND is NULL (looking up GdkWindow for NULL
  HWND always succeeds and returns the root window - not the intended
  effect)
* More logging
* Send DROP_FINISHED event after DnD loop ends
* Send STATUS event on feedback
* Move GetKeyboardState() and related code into _gdk_win32_window_drag_begin(),
  so that it's closer to the point where last_pt and start_pt are set
* Use & 0x80 to check for the key being pressed. Windows will set low-order bit
  to 1 for all mouse buttons to indicate that they are toggled, so simply
  checking for the value not being 0 is not enough anymore.
  This is probably a new thing in modern W32 that didn't exist before
  (OLE2 DnD code is old).
* Fixed (hopefully) and simplified HiDPI parts of the code.

Also adds managed DnD implementation for W32 GDK backend (for both
OLE2 and LOCAL protocols). Mostly a copy of the X11 backend code, but
there are some minor differences:
* doesn't use drag_window field in GdkDragContext,
  uses the one in GdkWin32DragContext exclusively
* subtracts hotspot offset from the window coordinates when showing
  the dragback animation
* tries to consistently support scaling and caches the scale
  in the context
* Some keynav code is removed (places where grabbing/ungrabbing should
  happen is marked with TODOs), and the rest is probably inert.

Also significantly changes the way selection (and clipboard) is handled
(as MSDN rightly notes, the handling for DnD and Clipboard
 formats is virtually the same, so it makes sense to handle
 both with the same code):
* Don't spam GDK_OWNER_CHANGE, send them only when owner
  actually changes
* Open clipboard when our process becomes the clipboard owner
  (we are doing it anyway, to empty the clipboard and *become* the owner),
  and then don't close it until a scheduled selection request event
  (with TARGETS target) is received. Process that event by announcing
  all of our supported formats (by that time add_targets() should have
  been called up the stack, thus the formats are known; just in case,
  add_targets() will also schedule a selection request, if one isn't
  scheduled already, so that late-coming formats can still be announced).
* Allow clipboard opening for selection_convert() to be delayed if it
  fails initially.
* The last two points above should fix all the bugs about GTK+ rising
  too much ruckus over OpenClipboard() failures, as owner change
  *is allowed* to fail (though not all callers currently handle
  that case), and selection_convert() is asynchronous to begin with.
  Still, this is somewhat risky, as there's a possibility that the
  code will work in unexpected ways and the clipboard will remain open.
  There's now logging to track the clipboard being opened and closed,
  and a number of failsafes that try to ensure that it isn't kept open
  for no reason.
* Added copious notes on the way clipboard works on X11, Windows and GDK-W32,
  also removed old comments in DnD implementation, replaced some of them
  with the new ones
* A lot of crufty module-global variables are stuffed into a singleton
  object, GdkWin32Selection. It's technically possible to make it a
  sub-object of the Display object (the way Wayland backend does),
  but since Display object on W32 is a singleton anyway... why bother?
* Fixed the send_change_events() a bit (was slightly broken in one of the
  previous iterations)
* Ensure that there's no confusion between selection conversion (an artifact
  term from X11) and selection transmutation (changing the data to be W32-compatible)
* Put all the transmutation code and format-target-matching code into gdkselection-win32.c,
  now this code isn't spread across multiple files.
* Consequently, moved some code away from gdkproperty-win32.c and gdkdnd-win32.c
* Extensive format transmutation checks for OLE2 DnD and clipboard.
  We now keep track of which format mappings are for transmutations,
  and which aren't (for example, when formats are passed as-is, or when
  a registered name is just an alias)
* Put transmutation code into separate functions

* Ensure that drop target keeps a format->target map for supported formats,
  this is useful when selection_convert() is called, as it only receives a
  single target and no hints on the format from which the data should
  be transmuted into this target.
* Add clear_targets() on W32, to de called by GTK
* Use g_set_object() instead of g_ref_object() where it is allowed.
* Fix indentation (and convert tabs to spaces), remove unused variables

https://bugzilla.gnome.org/show_bug.cgi?id=786509
parent 41026987
......@@ -54,11 +54,13 @@ libgdk_win32_la_SOURCES = \
gdkproperty-win32.c \
gdkscreen-win32.c \
gdkselection-win32.c \
gdkselection-win32.h \
gdktestutils-win32.c \
gdkwin32cursor.h \
gdkwin32display.h \
gdkwin32displaymanager.h \
gdkwin32dnd.h \
gdkwin32dnd-private.h \
gdkwin32glcontext.h \
gdkwin32.h \
gdkwin32id.c \
......
......@@ -551,9 +551,12 @@ inner_clipboard_window_procedure (HWND hwnd,
case WM_DRAWCLIPBOARD:
{
HWND hwnd_owner;
HWND stored_hwnd_owner;
HWND hwnd_opener;
GdkEvent *event;
GdkWindow *owner;
GdkWindow *stored_owner;
GdkWin32Selection *win32_sel = _gdk_win32_selection_get ();
hwnd_owner = GetClipboardOwner ();
......@@ -568,14 +571,16 @@ inner_clipboard_window_procedure (HWND hwnd,
#ifdef G_ENABLE_DEBUG
if (_gdk_debug_flags & GDK_DEBUG_DND)
{
if (OpenClipboard (hwnd))
if (win32_sel->clipboard_opened_for != INVALID_HANDLE_VALUE ||
OpenClipboard (hwnd))
{
UINT nFormat = 0;
while ((nFormat = EnumClipboardFormats (nFormat)) != 0)
g_print ("%s ", _gdk_win32_cf_to_string (nFormat));
CloseClipboard ();
if (win32_sel->clipboard_opened_for == INVALID_HANDLE_VALUE)
CloseClipboard ();
}
else
{
......@@ -590,6 +595,27 @@ inner_clipboard_window_procedure (HWND hwnd,
if (owner == NULL)
owner = gdk_win32_window_foreign_new_for_display (_gdk_display, hwnd_owner);
stored_owner = _gdk_win32_display_get_selection_owner (gdk_display_get_default (),
GDK_SELECTION_CLIPBOARD);
if (stored_owner)
stored_hwnd_owner = GDK_WINDOW_HWND (stored_owner);
else
stored_hwnd_owner = NULL;
if (stored_hwnd_owner != hwnd_owner)
{
if (win32_sel->clipboard_opened_for != INVALID_HANDLE_VALUE)
{
CloseClipboard ();
GDK_NOTE (DND, g_print ("Closed clipboard @ %s:%d\n", __FILE__, __LINE__));
}
win32_sel->clipboard_opened_for = INVALID_HANDLE_VALUE;
_gdk_win32_clear_clipboard_queue ();
}
event = gdk_event_new (GDK_OWNER_CHANGE);
event->owner_change.window = gdk_get_default_root_window ();
event->owner_change.owner = owner;
......@@ -719,16 +745,30 @@ gdk_win32_display_request_selection_notification (GdkDisplay *display,
static gboolean
gdk_win32_display_supports_clipboard_persistence (GdkDisplay *display)
{
return FALSE;
return TRUE;
}
static void
gdk_win32_display_store_clipboard (GdkDisplay *display,
GdkWindow *clipboard_window,
guint32 time_,
const GdkAtom *targets,
gint n_targets)
GdkWindow *clipboard_window,
guint32 time_,
const GdkAtom *targets,
gint n_targets)
{
GdkEvent tmp_event;
SendMessage (GDK_WINDOW_HWND (clipboard_window), WM_RENDERALLFORMATS, 0, 0);
memset (&tmp_event, 0, sizeof (tmp_event));
tmp_event.selection.type = GDK_SELECTION_NOTIFY;
tmp_event.selection.window = clipboard_window;
tmp_event.selection.send_event = FALSE;
tmp_event.selection.selection = _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_CLIPBOARD_MANAGER);
tmp_event.selection.target = 0;
tmp_event.selection.property = GDK_NONE;
tmp_event.selection.requestor = 0;
tmp_event.selection.time = GDK_CURRENT_TIME;
gdk_event_put (&tmp_event);
}
static gboolean
......
This diff is collapsed.
......@@ -56,6 +56,7 @@
#include "gdkdevice-wintab.h"
#include "gdkwin32dnd.h"
#include "gdkdisplay-win32.h"
#include "gdkselection-win32.h"
#include "gdkdndprivate.h"
#include <windowsx.h>
......@@ -2286,6 +2287,10 @@ gdk_event_translate (MSG *msg,
int i;
GdkWin32Selection *win32_sel = NULL;
STGMEDIUM *property_change_data;
display = gdk_display_get_default ();
window = gdk_win32_handle_table_lookup (msg->hwnd);
......@@ -3145,7 +3150,8 @@ gdk_event_translate (MSG *msg,
case WM_KILLFOCUS:
if (keyboard_grab != NULL &&
!GDK_WINDOW_DESTROYED (keyboard_grab->window))
!GDK_WINDOW_DESTROYED (keyboard_grab->window) &&
(_modal_operation_in_progress & GDK_WIN32_MODAL_OP_DND) == 0)
{
generate_grab_broken_event (device_manager, keyboard_grab->window, TRUE, NULL);
}
......@@ -3734,7 +3740,9 @@ gdk_event_translate (MSG *msg,
break;
case WM_DESTROYCLIPBOARD:
if (!_ignore_destroy_clipboard)
win32_sel = _gdk_win32_selection_get ();
if (!win32_sel->ignore_destroy_clipboard)
{
event = gdk_event_new (GDK_SELECTION_CLEAR);
event->selection.window = window;
......@@ -3752,12 +3760,29 @@ gdk_event_translate (MSG *msg,
case WM_RENDERFORMAT:
GDK_NOTE (EVENTS, g_print (" %s", _gdk_win32_cf_to_string (msg->wParam)));
if (!(target = g_hash_table_lookup (_format_atom_table, GINT_TO_POINTER (msg->wParam))))
{
GDK_NOTE (EVENTS, g_print (" (target not found)"));
return_val = TRUE;
break;
}
*ret_valp = 0;
return_val = TRUE;
win32_sel = _gdk_win32_selection_get ();
for (target = NULL, i = 0;
i < win32_sel->clipboard_selection_targets->len;
i++)
{
GdkSelTargetFormat target_format = g_array_index (win32_sel->clipboard_selection_targets, GdkSelTargetFormat, i);
if (target_format.format == msg->wParam)
{
target = target_format.target;
win32_sel->property_change_transmute = target_format.transmute;
}
}
if (target == NULL)
{
GDK_NOTE (EVENTS, g_print (" (target not found)"));
break;
}
/* We need to render to clipboard immediately, don't call
* _gdk_win32_append_event()
......@@ -3767,45 +3792,61 @@ gdk_event_translate (MSG *msg,
event->selection.send_event = FALSE;
event->selection.selection = GDK_SELECTION_CLIPBOARD;
event->selection.target = target;
event->selection.property = _gdk_selection;
event->selection.property = _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_GDK_SELECTION);
event->selection.requestor = gdk_win32_handle_table_lookup (msg->hwnd);
event->selection.time = msg->time;
property_change_data = g_new0 (STGMEDIUM, 1);
win32_sel->property_change_data = property_change_data;
win32_sel->property_change_format = msg->wParam;
fixup_event (event);
GDK_NOTE (EVENTS, g_print (" (calling _gdk_event_emit)"));
GDK_NOTE (EVENTS, _gdk_win32_print_event (event));
_gdk_event_emit (event);
gdk_event_free (event);
win32_sel->property_change_format = 0;
/* Now the clipboard owner should have rendered */
if (!_delayed_rendering_data)
if (!property_change_data->hGlobal)
{
GDK_NOTE (EVENTS, g_print (" (no _delayed_rendering_data?)"));
}
else
{
if (msg->wParam == CF_DIB)
{
_delayed_rendering_data =
_gdk_win32_selection_convert_to_dib (_delayed_rendering_data,
target);
if (!_delayed_rendering_data)
{
g_warning ("Cannot convert to DIB from delayed rendered image");
break;
}
}
/* The requestor is holding the clipboard, no
* OpenClipboard() is required/possible
*/
GDK_NOTE (DND,
g_print (" SetClipboardData(%s,%p)",
_gdk_win32_cf_to_string (msg->wParam),
_delayed_rendering_data));
property_change_data->hGlobal));
API_CALL (SetClipboardData, (msg->wParam, _delayed_rendering_data));
_delayed_rendering_data = NULL;
API_CALL (SetClipboardData, (msg->wParam, property_change_data->hGlobal));
}
g_clear_pointer (&property_change_data, g_free);
*ret_valp = 0;
return_val = TRUE;
break;
case WM_RENDERALLFORMATS:
*ret_valp = 0;
return_val = TRUE;
win32_sel = _gdk_win32_selection_get ();
if (API_CALL (OpenClipboard, (msg->hwnd)))
{
for (target = NULL, i = 0;
i < win32_sel->clipboard_selection_targets->len;
i++)
{
GdkSelTargetFormat target_format = g_array_index (win32_sel->clipboard_selection_targets, GdkSelTargetFormat, i);
if (target_format.format != 0)
SendMessage (msg->hwnd, WM_RENDERFORMAT, target_format.format, 0);
}
API_CALL (CloseClipboard, ());
}
break;
......@@ -3975,16 +4016,18 @@ gdk_event_dispatch (GSource *source,
if (event)
{
GdkWin32Selection *sel_win32 = _gdk_win32_selection_get ();
_gdk_event_emit (event);
gdk_event_free (event);
/* Do drag & drop if it is still pending */
if (_dnd_source_state == GDK_WIN32_DND_PENDING)
if (sel_win32->dnd_source_state == GDK_WIN32_DND_PENDING)
{
_dnd_source_state = GDK_WIN32_DND_DRAGGING;
sel_win32->dnd_source_state = GDK_WIN32_DND_DRAGGING;
_gdk_win32_dnd_do_dragdrop ();
_dnd_source_state = GDK_WIN32_DND_NONE;
sel_win32->dnd_source_state = GDK_WIN32_DND_NONE;
}
}
......
......@@ -41,41 +41,11 @@ HKL _gdk_input_locale;
gboolean _gdk_input_locale_is_ime;
UINT _gdk_input_codepage;
GdkAtom _gdk_selection;
GdkAtom _wm_transient_for;
GdkAtom _targets;
GdkAtom _delete;
GdkAtom _save_targets;
GdkAtom _utf8_string;
GdkAtom _text;
GdkAtom _compound_text;
GdkAtom _text_uri_list;
GdkAtom _text_html;
GdkAtom _image_png;
GdkAtom _image_jpeg;
GdkAtom _image_bmp;
GdkAtom _image_gif;
GdkAtom _local_dnd;
GdkAtom _gdk_win32_dropfiles;
GdkAtom _gdk_ole2_dnd;
UINT _cf_png;
UINT _cf_jfif;
UINT _cf_gif;
UINT _cf_url;
UINT _cf_html_format;
UINT _cf_text_html;
GdkWin32DndState _dnd_target_state = GDK_WIN32_DND_NONE;
GdkWin32DndState _dnd_source_state = GDK_WIN32_DND_NONE;
gint _gdk_input_ignore_wintab = FALSE;
gint _gdk_max_colors = 0;
GdkWin32ModalOpKind _modal_operation_in_progress = GDK_WIN32_MODAL_OP_NONE;
HWND _modal_move_resize_window = NULL;
gboolean _ignore_destroy_clipboard = FALSE;
HGLOBAL _delayed_rendering_data = NULL;
GHashTable *_format_atom_table = NULL;
/* The singleton selection object pointer */
GdkWin32Selection *_win32_selection = NULL;
......@@ -44,6 +44,9 @@
#include <wintab.h>
#include <imm.h>
/* for CFSTR_SHELLIDLIST */
#include <shlobj.h>
static gboolean gdk_synchronize = FALSE;
static gboolean dummy;
......@@ -98,38 +101,6 @@ _gdk_win32_windowing_init (void)
GDK_NOTE (EVENTS, g_print ("input_locale:%p, codepage:%d\n",
_gdk_input_locale, _gdk_input_codepage));
_gdk_selection = gdk_atom_intern_static_string ("GDK_SELECTION");
_wm_transient_for = gdk_atom_intern_static_string ("WM_TRANSIENT_FOR");
_targets = gdk_atom_intern_static_string ("TARGETS");
_delete = gdk_atom_intern_static_string ("DELETE");
_save_targets = gdk_atom_intern_static_string ("SAVE_TARGETS");
_utf8_string = gdk_atom_intern_static_string ("UTF8_STRING");
_text = gdk_atom_intern_static_string ("TEXT");
_compound_text = gdk_atom_intern_static_string ("COMPOUND_TEXT");
_text_uri_list = gdk_atom_intern_static_string ("text/uri-list");
_text_html = gdk_atom_intern_static_string ("text/html");
_image_png = gdk_atom_intern_static_string ("image/png");
_image_jpeg = gdk_atom_intern_static_string ("image/jpeg");
_image_bmp = gdk_atom_intern_static_string ("image/bmp");
_image_gif = gdk_atom_intern_static_string ("image/gif");
_local_dnd = gdk_atom_intern_static_string ("LocalDndSelection");
_gdk_win32_dropfiles = gdk_atom_intern_static_string ("DROPFILES_DND");
_gdk_ole2_dnd = gdk_atom_intern_static_string ("OLE2_DND");
/* MS Office 2007, at least, offers images in common file formats
* using clipboard format names like "PNG" and "JFIF". So we follow
* the lead and map the GDK target name "image/png" to the clipboard
* format name "PNG" etc.
*/
_cf_png = RegisterClipboardFormat ("PNG");
_cf_jfif = RegisterClipboardFormat ("JFIF");
_cf_gif = RegisterClipboardFormat ("GIF");
_cf_url = RegisterClipboardFormat ("UniformResourceLocatorW");
_cf_html_format = RegisterClipboardFormat ("HTML Format");
_cf_text_html = RegisterClipboardFormat ("text/html");
_gdk_win32_selection_init ();
}
......
......@@ -40,6 +40,7 @@
#include <gdk/win32/gdkwin32display.h>
#include <gdk/win32/gdkwin32screen.h>
#include <gdk/win32/gdkwin32keys.h>
#include <gdk/win32/gdkselection-win32.h>
#include "gdkinternals.h"
......@@ -296,46 +297,8 @@ extern UINT _gdk_input_codepage;
extern guint _gdk_keymap_serial;
/* GdkAtoms: properties, targets and types */
extern GdkAtom _gdk_selection;
extern GdkAtom _wm_transient_for;
extern GdkAtom _targets;
extern GdkAtom _delete;
extern GdkAtom _save_targets;
extern GdkAtom _utf8_string;
extern GdkAtom _text;
extern GdkAtom _compound_text;
extern GdkAtom _text_uri_list;
extern GdkAtom _text_html;
extern GdkAtom _image_png;
extern GdkAtom _image_jpeg;
extern GdkAtom _image_bmp;
extern GdkAtom _image_gif;
/* DND selections */
extern GdkAtom _local_dnd;
extern GdkAtom _gdk_win32_dropfiles;
extern GdkAtom _gdk_ole2_dnd;
/* Clipboard formats */
extern UINT _cf_png;
extern UINT _cf_jfif;
extern UINT _cf_gif;
extern UINT _cf_url;
extern UINT _cf_html_format;
extern UINT _cf_text_html;
/* OLE-based DND state */
typedef enum {
GDK_WIN32_DND_NONE,
GDK_WIN32_DND_PENDING,
GDK_WIN32_DND_DROPPED,
GDK_WIN32_DND_FAILED,
GDK_WIN32_DND_DRAGGING,
} GdkWin32DndState;
extern GdkWin32DndState _dnd_target_state;
extern GdkWin32DndState _dnd_source_state;
/* The singleton selection object pointer */
GdkWin32Selection *_win32_selection;
void _gdk_win32_dnd_do_dragdrop (void);
void _gdk_win32_ole2_dnd_property_change (GdkAtom type,
......@@ -368,22 +331,8 @@ extern gint _gdk_max_colors;
#define GDK_WIN32_COLORMAP_DATA(cmap) ((GdkColormapPrivateWin32 *) GDK_COLORMAP (cmap)->windowing_data)
/* TRUE when we are emptying the clipboard ourselves */
extern gboolean _ignore_destroy_clipboard;
/* Mapping from registered clipboard format id (native) to
* corresponding GdkAtom
*/
extern GHashTable *_format_atom_table;
/* Hold the result of a delayed rendering */
extern HGLOBAL _delayed_rendering_data;
extern GdkCursor *_gdk_win32_grab_cursor;
HGLOBAL _gdk_win32_selection_convert_to_dib (HGLOBAL hdata,
GdkAtom target);
/* Convert a pixbuf to an HICON (or HCURSOR). Supports alpha under
* Windows XP, thresholds alpha otherwise.
*/
......
......@@ -137,20 +137,15 @@ _gdk_win32_window_get_property (GdkWindow *window,
}
void
_gdk_win32_window_change_property (GdkWindow *window,
GdkAtom property,
GdkAtom type,
gint format,
GdkPropMode mode,
const guchar *data,
gint nelements)
_gdk_win32_window_change_property (GdkWindow *window,
GdkAtom property,
GdkAtom type,
gint format,
GdkPropMode mode,
const guchar *data,
gint nelements)
{
HGLOBAL hdata;
gint i, size;
guchar *ucptr;
wchar_t *wcptr, *p;
glong wclen;
GError *err = NULL;
GdkWin32Selection *win32_sel = _gdk_win32_selection_get ();
g_return_if_fail (window != NULL);
g_return_if_fail (GDK_IS_WINDOW (window));
......@@ -161,6 +156,7 @@ _gdk_win32_window_change_property (GdkWindow *window,
GDK_NOTE (DND, {
gchar *prop_name = gdk_atom_name (property);
gchar *type_name = gdk_atom_name (type);
gchar *datastring = _gdk_win32_data_to_string (data, MIN (10, format*nelements/8));
g_print ("gdk_property_change: %p %s %s %s %d*%d bits: %s\n",
GDK_WINDOW_HWND (window),
......@@ -171,103 +167,35 @@ _gdk_win32_window_change_property (GdkWindow *window,
(mode == GDK_PROP_MODE_APPEND ? "APPEND" :
"???"))),
format, nelements,
_gdk_win32_data_to_string (data, MIN (10, format*nelements/8)));
datastring);
g_free (datastring);
g_free (prop_name);
g_free (type_name);
});
#ifndef G_DISABLE_CHECKS
/* We should never come here for these types */
g_return_if_fail (type != GDK_TARGET_STRING);
g_return_if_fail (type != _text);
g_return_if_fail (type != _compound_text);
g_return_if_fail (type != _save_targets);
if (property == _gdk_selection &&
format == 8 &&
mode == GDK_PROP_MODE_REPLACE)
if (G_UNLIKELY (type == _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_COMPOUND_TEXT) ||
type == _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_SAVE_TARGETS)))
{
if (type == _image_bmp && nelements < sizeof (BITMAPFILEHEADER))
{
g_warning ("Clipboard contains invalid bitmap data");
return;
}
if (type == _utf8_string)
{
wcptr = g_utf8_to_utf16 ((char *) data, nelements, NULL, &wclen, &err);
if (err != NULL)
{
g_warning ("Failed to convert utf8: %s", err->message);
g_clear_error (&err);
return;
}
if (!OpenClipboard (GDK_WINDOW_HWND (window)))
{
WIN32_API_FAILED ("OpenClipboard");
g_free (wcptr);
return;
}
wclen++; /* Terminating 0 */
size = wclen * 2;
for (i = 0; i < wclen; i++)
if (wcptr[i] == '\n' && (i == 0 || wcptr[i - 1] != '\r'))
size += 2;
if (!(hdata = GlobalAlloc (GMEM_MOVEABLE, size)))
{
WIN32_API_FAILED ("GlobalAlloc");
if (!CloseClipboard ())
WIN32_API_FAILED ("CloseClipboard");
g_free (wcptr);
return;
}
ucptr = GlobalLock (hdata);
p = (wchar_t *) ucptr;
for (i = 0; i < wclen; i++)
{
if (wcptr[i] == '\n' && (i == 0 || wcptr[i - 1] != '\r'))
*p++ = '\r';
*p++ = wcptr[i];
}
g_free (wcptr);
GlobalUnlock (hdata);
GDK_NOTE (DND, g_print ("... SetClipboardData(CF_UNICODETEXT,%p)\n",
hdata));
if (!SetClipboardData (CF_UNICODETEXT, hdata))
WIN32_API_FAILED ("SetClipboardData");
if (!CloseClipboard ())
WIN32_API_FAILED ("CloseClipboard");
}
else
{
/* We use delayed rendering for everything else than
* text. We can't assign hdata to the clipboard here as type
* may be "image/png", "image/jpg", etc. In this case
* there's a further conversion afterwards.
*/
GDK_NOTE (DND, g_print ("... delayed rendering\n"));
_delayed_rendering_data = NULL;
if (!(hdata = GlobalAlloc (GMEM_MOVEABLE, nelements > 0 ? nelements : 1)))
{
WIN32_API_FAILED ("GlobalAlloc");
return;
}
ucptr = GlobalLock (hdata);
memcpy (ucptr, data, nelements);
GlobalUnlock (hdata);
_delayed_rendering_data = hdata;
}
g_return_if_fail_warning (G_LOG_DOMAIN,
G_STRFUNC,
"change_property called with a bad type");
return;
}
else if (property == _gdk_ole2_dnd)
#endif
if (property == _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_GDK_SELECTION) ||
property == _gdk_win32_selection_atom (GDK_WIN32_ATOM_INDEX_OLE2_DND))
{
/* Will happen only if gdkdnd-win32.c has OLE2 dnd support compiled in */
_gdk_win32_ole2_dnd_property_change (type, format, data, nelements);
_gdk_win32_selection_property_change (win32_sel,
window,
property,
type,