Moving the direct-access redefinitions of various macros
to gdkprivate-x11.h and use that header throughout in x11/.
Also remove a workaround for a long-fixed X server bug.
The history before this was kind of twisted as several different
approaches were tested, so that was all squashed into this initial
commit to hide the uninteresting changes and files that were later
removed.
2008-08-05 Tor Lillqvist <tml@novell.com>
Bug 544684 - Win64 issue, window handles are assumed to be 32-bit
* gdk/gdkselection.h
* gdk/gdkselection.c
* gdk/win32/gdkselection-win32.c
* gdk/x11/gdkselection-x11.c: Change type of the requestor
window id parameter of gdk_selection_send_notify_for_display()
and gdk_selection_send_notify() from guint32 to
GdkNativeWindow.
* gdk/win32/gdkselection-win32.c: Add some guchar and char pointer
casts to get rid of gcc 4.4 warnings. Print GdkAtom values in
debugging output using the %p format.
svn path=/trunk/; revision=20991
2007-11-12 Alexander Larsson <alexl@redhat.com>
* gdk/x11/gdkselection-x11.c:
Avoid loading the ISO8859-1 iconv module.
We're already doing all the required work anyway.
This saves 4kb private dirty memory per gtk+ process
svn path=/trunk/; revision=18986
2005-03-15 Matthias Clasen <mclasen@redhat.com>
Make PLT-reduction work with gcc4, and don't include
everything in gdkalias.h:
* gdk/gdk.symbols: Group symbols by header and source file.
* gdk/makegdkalias.pl: Protect definitions by the same
preprocessor symbols used to guard the headers. Move
the alias declarations to a separate file which is
produced when calling makegdkalias.pl -def
* gdk/Makefile.am (gdkaliasdef.c): Add a rule to generate this
file.
* gdk/*.c, gdk/x11/*.c: Include gdkalias.h after the other
headers, include gdkaliasdef.c at the bottom.
Mon Aug 9 15:41:17 2004 Matthias Clasen <maclas@gmx.de>
Add hidden aliases for exported symbols which are
used internally in order to get rid of many PLT
entries. (#145519, Arjan van de Ven)
* gdk/Makefile.am: Add rules to generate gdk.def and
gdkalias.h from gdk.symbols, and make make check check
the abi with abicheck.sh.
* gdk/gdk.symbols: New file. Definition of the GDK ABI.
The file can be processed by cpp to filter out certain
subsets of symbols.
* gdk/abicheck.sh: New file. Script to check the actually
symbols exported from libgdk-x11.2.0.so against the symbols
found in gdk.symbols.
* gdk/makegdkalias.pl: New file. Perl script to generate the
header containing the alias definitions for internally used
exported symbols from a list of symbols.
* gdk/*.c, gdk/x11/*.c: Include gdkalias.h
2004-03-05 Federico Mena Quintero <federico@ximian.com>
Fixes#136082 and #135265, patch by Morten Welinder.
* configure.in: Use AC_SYS_LARGEFILE.
* */*.c: #include <config.h>
Wed Feb 25 15:36:50 2004 Owen Taylor <otaylor@redhat.com>
* gdk/x11/gdkselection-x11.c (gdk_utf8_to_compound_text_for_display):
Call g_convert(), not g_convert() with fallback, since Emacs is
happier if we reject the COMPOUND_TEXT request and it can
then ask for UTF-8. (#114527)
* gtk/gtkselection.c (gtk_selection_data_set_text): When
TEXT is requested, if COMPOUND_TEXT fails, fall back to STRING.
Wed Dec 4 14:31:46 2002 Owen Taylor <otaylor@redhat.com>
* gdk/x11/gdkdnd-x11.c: Always look up and create the
Motif drag window as a child of the root window of screen 0
rather than the default screen. (#100362, Erwann Chenede)
* gdk/x11/gdkdnd-x11.c (motif_read_initiator_info):
Return FALSE, not GDK_FILTER_REMOVE on failure; this
isn't a filter function.
* gdk/x11/gdkselection-x11.c gtk/gtkselection.c: Add
some g_return_if_fail() to catch selection == None more
gracefully than an X error.
Thu Oct 31 12:40:39 2002 Owen Taylor <otaylor@redhat.com>
* gdk/gdk.[ch] gdk/gdkglobals.c gdk/gdkinternals.h
gdk/{x11,win32,linux-fb}/gdkscreen-{x11,win32,linux-fb}.c:
Add a --screen option for setting the default screen.
(Based on a patch from Balamurali Viswanathan, #81145)
* gdk/gdk.c gdkdisplay.h gtk/gtkmain.c: Add
gdk_display_open_default_libgtk_only(), so gtk_init_check()
and gdk_init_check() can share the same behavior w.r.t.
--screen.
* gdk/gdk.[ch]: Make gdk_get_display_arg_name() G_CONST_RETURN.
* gdk/x11/gdkselection-x11.c (gdk_selection_property_get):
Suppress a spurious warning.
* tests/testgtkrc: Remove someleft-over commented out
includes that could be confusing.
Thu Oct 3 19:00:55 2002 Owen Taylor <otaylor@redhat.com>
* gdk/x11/gdkselection-x11.c (gdk_selection_property_get):
Fix error in computing length and a memory leak.
(Fixes#94072, reported by Hema Seetharamaiah)
* gtk/gtkmenu.c (gtk_menu_motion_notify): Fix &event
used instead of event.
* gtk/gtkselection.c (gtk_selection_init): initialize
gtk_selection_atoms only once at the 1st call.
* gdk/x11/gdkselection-x11.c (gdk_selection_property_get):
set length of selection data from number of read bytes (#90595)
Thu Aug 1 11:26:03 2002 Owen Taylor <otaylor@redhat.com>
* gdk/gdkdisplay.[ch] gdk/gdkscreen.[ch] gdkinternals.h:
Start implementing display/screen closing scheme; keep a
flag for whether displays and screens are closed,
call g_object_run_dispose(). Remove public gdk_screen_close().
* gdk/x11/gdkdisplay-x11.c gdk/x11/gdkscreen-x11.c: Add
dispose() methods; move appropriate parts of the finalize
there.
* gdk/x11/gdkcolor-x11.c gdk/x11/gdkimage-x11.c
gdk/x11/gdkmain-x11.c gdk/x11/gdkpango-x11.c
gdk/x11/gdkpixmap-x11.c gdk/x11/gdkproperty-x11.c
gdk/x11/gdkselection-x11.c gdk/x11/gdkwindow-x11.c:
Start of making everything correctly ignore operations
when a display has been closed.
* gdk/x11/gdkwindow-x11.c (gdk_window_get_decorations):
Handle decorations == NULL.
* gdk/x11/gdkcolor-x11.c (gdk_colormap_remove):
Remove unnecessary hash table creation.
* gdk/x11/gdkinput.c gdk/x11/gdkinput-x11.c gdk/win32/gdkinput.c
Fix up gdk_device_get_history - handle events, n_events == NULL,
etc.
* gdk/x11/gdkproperty-x11.c (gdk_property_get):
Handle failure better.
* gdk/x11/gdkselection-x11.c (gdk_selection_property_get):
Handle failure better, handle data == NULL, move docs
here, remove an excess round trip by asking for
all selection data at once.
* gdk/gdkselection.c gdk/win32/{x11,win32}/gdkselection-{x11,win32}.c
gdk/{x11,win32}/gdkmain-{x11,win32}.c gdk/gdkdisplay.c: Move
gdk_text_property_to_text_list(), gdk_string_to_compound_text(),
gdk_display_set_sm_client_id() to display-independent part of GDK.
* gdk/Makefile.am (gdk_c_sources): Sort gdkdisplay/screen.[ch]
into the right place.
Wed Jun 5 18:34:47 2002 Owen Taylor <otaylor@redhat.com>
Changes multihead reorganizing code for win32 support,
mostly from a patch by Hans Breuer.
* gdk/gdkcolor.c gdk/x11/gdkcolor-x11.c gdk/gdkcursor.c
gdk/x11/gdkcursor-x11.c gdk/gdkevents.c gdk/x11/gdkevents-x11.c
gdk/gdkfont.c gdk/x11/gdkfont-x11.c gdk/gdkkeys.c
gdk/x11/gdkkeys-x11.c gdk/gdkimage.c gdk/x11/gdkimage-x11.c
gdk/gdkscreen.c gdk/x11/gdkmain-x11.c
gdk/gdkdisplay.c gdk/gdkevents-x11.c gdk/gdkpango.c
gdk/x11/gdkpango-x11.c gdk/gdkselection.c
gdk/x11/gdkselection-x11.c gdk/gdkwindow.c
gdk/x11/gdkwindow-x11.c gdk/gdkvisual.c gdk/x11/gdkvisual-x11.c:
Move port-independent singlehead wrapper functions into
port-independent part of GDK. (#80009)
* gdk/win32/gdkcolor-win32.c gdk/win32/gdkcursor-win32.c
gdk/win32/gdkevents-win32.c gdk/win32/gdkfont-win32.c
gdk/win32/gdkimage-win32.c gdk/win32/gdkkeys-win32.c
gdk/win32/gdkmain-win32.c gdk/win32/gdkproperty-win32.c
gdk/win32/gdkselection-win32.c gdk/win32/gkwindow-win32.c:
Turn singlehead functions into "multihead" functions that ignore
their GdkDisplay or GdkScreen arguments.
* gdk/win32/gdkdrawable-win32.c gdk/win32/gdkevents-win32.c
gdk/win32/gdkinput-win32.c gdk/win32/gdkprivate-win32.h:
Misc multihead-compatibility changes.
* gtk/gtk.def gdk/gdk.def: Update for multihead functions.
* gdk/gdkcolormap.h gdk/gdkvisual.h gdk/x11/gdkcolormap-x11.c
gdk/x11/gdkvisual-x11.c: Remove the screen fields
from the public parts of the colormap/visual structures, add accessors
instead.
* gdk/gdkpixbuf-render.c gdk/gdkpixmap.c gdk/gdkrgb.c
gdk/x11/gdkcolormap-x11.c gdk/x11/gdkimage-x11.c
gdk/x11/gdkimage-x11.c gdk/x11/gdkprivate-x11.h gtk/gtkgc.c
gtk/gtkstyle.c gtk/gtkwidget.c: Use accessors to get the screen
for colormaps, visuals; move the fields into the private
structures for the x11 backend.
* gdk/gdkdisplay.[ch] gdk/x11/gdkdisplay-x11.[ch]
gdk/gdkscreen.[ch] gdk/x11/gdkscreen-x11.c:
Remove virtualization of screen and display functions.
(#79990, patch from Erwann Chenede)
* gdk/win32/gdkdisplay-x11.c gdk/win32/gdkscreen-win32.c
gdk/win32/{Makefile.am, makefile.msc, makefile.mingw}:
New files containing stub implementations of Display,
Screen functions.
* gdk/x11/gdkscreen-x11.[ch] gdk/x11/gdkdisplay-x11.[ch]
gdk/x11/gdkx.h: Clean up function exports and what
headers they are in. (#79954)
* gdk/x11/gdkx.h: Fix macro that was referring to a non-existant
screen->screen_num. (In the patch for #79972, Erwann Chenede)
* gdk/gdkscreen.c gdk/gdkwindow.c gdk/x11/gdkinternals.h
gdk/x11/gdkscreen-x11.c: Fix gdk_screen_get_window_at_pointer()
to use window hooks. (#79972, patch partly from Erwann Chenede)
* gdk/x11/gdkdisplay-x11.c gdk/x11/gdkevents-x11.c: Fix
some warnings.
Thu Apr 25 16:51:40 2002 Owen Taylor <otaylor@redhat.com>
Start of integration of Erwann Chenede's multihead work
from the gtk-multihead branch.
* gdk/gdkdisplay.[ch] gdk/gdkscreen.[ch]
gdk/x11/gdkdisplay-x11.[ch] gdk/x11/gdkscreen-x11.[ch]
New classes representing a set of screens with attached
input devices and a single contiguous area, respectively.
* gdk/gdk.[ch] gdk/gdkinternals.h gdk/x11/gdkmain-x11.c:
gdk/x11/gdkprivate-x11.h: Make the initialization interface
simple _gdk_windowing_init() and do the rest in
gdk_open_display() calls.
* gdk/gdk.[ch]: Add gdk_parse_args() which can be used
to do the display-independent part of initialization
instead of gdk_init_[check].
* gdk/gdkcursor.h gdk/gdkfont.h gdk/gdkkeys.h gdk/gdkpixmap.h
gdk/gdkproperty.h gdk/gdkselection.h gdk/gdkwindow.h:
Add multihead variants (_for_display(), for_screen()) of functions
getting information specific to a particular screen screen or
display.
* gdk/gdkscreen.[ch]: Add gdk_screen__* variants of functions
like gdk_rgb_get_colormap() that used to get/list global
objects.
* gdk/x11/gdkx.h: Add functions for converting GdkScreen
and GdkDisplay into the X equivalents.
* gdk/x11/gdkwindow-x11.c: Removed gdk_window_xid_at_coords()
not in the headers and unused.
* configure.in gdk/x11/{gxid.c,gxid_lib.[ch],gdkinput-gxi.c}:
Remove gxid support ... has not been tested for a long time...
"xfree" support is more portable to non XFree86.
* gdk/**.h: Add a GDK_MULTIHEAD_SAFE define that can be
used to turn off functions that are inherently non-multihead
safe.
* gdk/**.c: add GDK_NOTE(multihead, ...) calls when functions
are used in non-multihead-safe ways.
* gdk/*.c gdk/x11/*.c: Changes to make the internals of GDK
multihead safe.
Sun Feb 24 23:23:28 2002 Owen Taylor <otaylor@redhat.com>
* tests/testselection.c (main): Convert over to using
an GtkInvisible - selections don't work properly
with now NO_WINDOW GtkToggleButton. (Example really
should be using GtkClipboard.)
* gdk/x11/gdkselection-x11.c (gdk_selection_property_get):
Fix problems if sizeof(GdkAtom) != sizeof(Atom). (Unlikely)
* gdk/x11/gdkproperty-x11.c (gdk_property_get): Set
actual_length when converting atoms as well.
(Gregory Merchan, #72074)
Wed Feb 20 21:52:13 2002 Owen Taylor <otaylor@redhat.com>
* gtk/gtkselection.c (gtk_selection_request): Set the property
as type ATOM_PAIR, not ATOM. (#72074, Gregory Merchan.)
* gdk/x11/gdk{property,selecton}-x11.c: Auto-convert properties
of type ATOM_PAIR as well as properties of type ATOM.
Wed Feb 13 12:41:44 2002 Owen Taylor <otaylor@redhat.com>
* gtk/gtkmain.c (gtk_init_check): g_warning() if setting
the local fails, like gdk_set_locale() did.
* gdk/x11/gdkselection-x11.c (gdk_text_property_to_utf8_list):
Don't free local_list if local_count == 0. (#71241, reported
by Kevin Vandersloot.)
* gdk/x11/gdkselection-x11.c (gdk_text_property_to_text_list):
Clean up list == NULL handling and failure.
Mon Jan 14 17:14:13 2002 Owen Taylor <otaylor@redhat.com>
* gdk/x11/gdkselection-x11.c (sanitize_utf8): Don't
mangle sequences of consecutive \n or \r.
Sun Oct 21 23:27:00 2001 Owen Taylor <otaylor@redhat.com>
* gtk/gtkwidget.c (gtk_widget_translate_coordinates): Fix
problem with g_return_if_fail return value.
* gdk/x11/gdkproperty-x11.c docs/Changes-2.0.txt: Move over the
virtual atom code from the gdk-multihead branch, removing the per-display
part. Virtualizing atoms needs to be done now to prevent compat
breakage in direct Xlib accessing code in the future. (#62208)
* gdk/x11/gdkx.h: gdk/gdk/x11/gdkproperty-x11.c: Export
gdk_x11_xatom_to_atom, gdk_x11_atom_to_xatom().
* gdk/gdktypes.h docs/Changes-2.0.txt: Make GdkAtom
an opaque pointer type so the compiler catches attempts
to mingle it with X atoms.
* gdk/x11/{gdkdnd-x11.c,gdkevents-x11.c,gdkglobals-x11.c,
gdkkeys-x11.c, gdkmain-x11.c, gdkprivate-x11.c,
gdkproperty-x11.c, gdkselection-x11.c, gdkwindow-x11.c}
gtk/{gtkclist.c,gtkctree.c,gtkdnd.c,gtkplug.c,gtksocket.c}
tests/testdnd.c,tests/testselection.c:
Fix up for above atom changes.
* gdk/gdkselection.h (GDK_SELECTION_CLIPBOARD): Add, since we
now have the ability to add custom predefines.
* gtk/{gtkentry.c,gtklabel.c,gtkoldeditable.c,gtktextview.c}:
Use GDK_SELECTION_CLIPBOARD instead of GDK_NONE in calls
to gtk_clipboard_get().
* gdk/win32/gdkproperty-win32.c: Add CLIPBOARD, fix up
for GdkAtom => pointer change.
* gdk/linux-fb/gdkproperty-fb.c: Fix handling of predefined
atoms, fix for GdkAtom => pointer change.
Fri Sep 7 11:51:44 2001 Owen Taylor <otaylor@redhat.com>
Make gdkx.h the only installed header from gdk/x11.
All structures in gdk/x11 are opaque.
* gdk/x11/Makefile.am gdk/x11/gdkx.h gdk/x11/gdkprivate-x11.h:
Don't install gdk{drawable,pixmap,window}-x11.h.
* gdk/x11/{gdkcolormap-x11.c, gdkfont-x11.c, gdkx.h, gdkvisual-x11.c:
Move GdkColormapPrivateX11, GdkFontPrivateX GdkImagePrivateX11,
GdkVisualClass into C files.
* gdk/gdkpixmap-x11.[ch]: Make gdk_pixmap_impl_get_type() static.
* gdk/x11/{gdkcolor-x11.c, gdkcursor-x11.c, gdkdrawable-x11.c,
gdkfont-x11.c, gdkgc-x11.c, gdkx.h, gdkimage-x11,gdkvisual-x11.c}
Add public functions to replace previously exported direct
structure access.
gdk_x11_colormap_get_{xdisplay,xcolormap}
gdk_x11_cursor_get_{xdisplay,xcursor},
gdk_x11_drawable_get_{xdisplay,xcursor,gdk_x11_visual_get_xvisual,
gdk_x11_font_get_{xdisplay,xfont}, gdk_x11_image_get_{xdisplay,ximage},
gdk_x11_gc_get_{xdisplay,ximage}
* gdk/gdkprivate.h gdk/gdkinternals.h: Move GdkColorInfo,
GdkEventFilter, GdkClientFilter, GdkFontPrivate to gdkinternals.
Fix a number of variables and functions that were exported
"accidentally" from GDK.
* gdk/**.[ch]: gdk => _gdk for gdk_visual_init,
gdk_events_init, gdk_input_init, gdk_dnd_init, gdk_image_exit,
gdk_input_exit, gdk_windowing_exit, gdk_event_func, gdk_event_data,
gdk_event_notify, gdk_queued_events, gdk_queued_tail,
gdk_event_new, gdk_events_queue, gdk_events_unqueue,
gdk_event_queue_find_first, gdk_event_queue_remove_link,
gdk_event_queue_append, gdk_event_button_generate,
gdk_debug_flags, gdk_default_filters, gdk_parent_root.
* gdk/x11/{gdkevents-x11.c, gdkglobals-x11.c, gdkimage-x11.c,
gdkmain-x11.c, gdkprivate-x11.h, gdk/x11/gdkwindow-x11.c}:
gdk => _gdk for gdk_event_mask_table, gkd_nevent_masks,
gdk_wm_window_protocols, gdk_leader_window, gdk_xgrab_window,
gdk_use_xshm, gdk_input_ignore_core.
* gdk/x11/xsettings-common.h (xsettings_list_insert): Add
#defines to namespace functions into the private _gdk_
namespace.
* gdk/gdkwindow.[ch] gdk/x11/gdkx.h: Add gdk_get_default_root_window ()
to replace gdk_parent_root exported variable. Adjust and
deprecate GDK_ROOT_PARENT().
* demos/{testpixbuf-drawable.c,testpixbuf-save.c}: Fix
GDK_ROOT_PARENT usage, remove includes of port-specific
headers.
* gdk/{win32,x11,fb}/gdkinput*.[ch]: s/gdk/_gdk/ for
_gdk_input_gxid_host, _gdk_input_gxid_port, _gdk_input_ignore_core,
gdk_input_devices, _gdk_input_windows, gdk_init_input_core.
* gdk/x11/{gdkevents-x11.,c gdkglobals-x11.c, gdkmain-x11.c}
docs/Changes-2.0.txt: Remove gdk_wm_protocols,
gdk_wm_delete_window functions, gdk_wm_take_focus,
use gdk_atom_intern() instead.
* gdk/linux-fb/{gdkselection-fb.c, gdkmain-fb.c, gdkprivatefb.h}
gdk/win32/{gdkselection-win32.c, gdkmgdkwin32.h, gdkprivate-win32.h}
gdk/x11/{gdkselection-x11.c gdkx.h, gtkprivate-x11.h}
gtk/gtkselection.c
Unexport gdk_selection_property, just use
gdk_atom_intern ("GDK_SELECTION").
* gdk/x11/{gdkprivate-x11.h,gdkdrawable-x11h,gdkgc-x11.c,gdkx.h}:
Unexport gdk_drawable_impl_x11_get_type, gdk_gc_x11_get_type,
GDK_GC_X11 cast macros, GdkGCX11 structures, GdkCursorPrivate,
GdkVisualprivate, gdk_x11_gc_flush.
Make a number of public exports of variables into functions
to increase encapsulation.
* gdk/gdkinternals.h gdk/gdkinput.h gdk/gdkevents.h
gdk/linux-fb/gdkmouse-fb.c: gdk_core_pointer => _gdk_core_pointer,
move to gdkinternals.h. Add gdk_device_get_core_pointer ().
* gdk/gdkprivate.h gdk/gdkpango.c gdk/gdkinternals.h
docs/Changes-2.0.txt: Unexport gdk_parent_root, gdk_error_code,
gdk_error_warnings.
* gdk/x11/{gdkcolormap-x11.c, gdkmain-x11.c, gdkx.h}
docs/Changes-2.0.txt:
s/gdk_screen/_gdk_screen/, add gdk_x11_get_default_screen()
s/gdk_root_window/_gdk_root_window/, add gdk_x11_get_default_root_xwindow()
Add gdk_x11_get_default_xdisplay().
* gdk/gdk.h gdk/gdk.c linux-fb/gdkfb.h linux-fb/gdkglobals-fb.c
win32/gdkwin32.h x11/gdkglobals-x11.c gdk/x11/gdkmain-x11.c
gdk/x11/gdkx.h: gdk/gdk.def: Add gdk_get/set_program_class,
Don't export gdk_progclass, move --class command line
option and handling to common portion of GDK.
Miscellaneous fixes:
* gdk/x11/gdkwindow-x11.c (gdk_window_set_icon_list): Fix
g_return_val_if_fail that should have been g_return_if_fail.
* gdk/gdkinternals.h gdk/gdkprivate.h: Move
gdk_synthesize_window_state() to the semi-public gdkprivate.h.
* gtk/gtkdnd.c (_gtk_drag_source_handle_event): Remove uneeded
X11 dependency.
* gdk/linux-fb/gdkmain-fb.c gdk/win32/gdkmain-win32.c gdk/TODO:
Remove unused gdk_key_repeat_disable/restore.
* linux-fb/gdkglobals-fb.c win32/gdkglobals-win32.c
x11/gdkglobals-x11.c x11/gdkprivate-x11.h gdk/gdk.def:
Remove unused gdk_null_window_warnings variable.
* gdk/Makefile.am (DIST_SUBDIRS) nanox/*: cvs remove nanox;
it can be retrieved from the repository; it is too far
from functional to be worth having people check out;
it would be easier to start from scratch, I suspect.
* gdk/x11/gdkpixmap-x11.c: Fix lvalue usage of GDK_PIXMAP_XID().
* gdk/x11/gdkkeys-x11.c gdk/gdkrgb.c gdk/gdkwindow.c
gdk/x11/gdkpango-x11.c gdk/x11/gdkselection-x11.c:
Fix some accidentally global variables and unused global variables.
* gdk/x11/gdkkeys-x11.c gdk/gdkrgb.c gdk/gdkwindow.c
gdk/x11/gdkpango-x11.c gdk/x11/gdkselection-x11.c:
Fix some accidentally global variables and unused global variables.
Add some space for future expansion to multihead.
* gdk/gdkdrawable.h: Add four reserved function pointers
for future expansion of GdkDrawableClass.
* gtk/gtkwindow.h gtk/gtkinvisible.h: Add reserved pointer
where we can put a GdkScreen * later.
* gtk/gtkclipboard.c (request_text_received_func): ask apps for
COMPOUND_TEXT instead of TEXT
* gdk/x11/gdkselection-x11.c (gdk_utf8_to_compound_text): correctly
interpret the return value of g_string_to_compound_text()
(#55152)
