mutter/clutter/x11/clutter-event-x11.c

466 lines
12 KiB
C

/* Clutter.
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2006, 2007, 2008 OpenedHand Ltd
* Copyright (C) 2009, 2010 Intel Corp.
*
* 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/>.
*
*
*
* Authored by:
* Matthew Allum <mallum@openedhand.com>
* Emmanuele Bassi <ebassi@linux.intel.com>
*/
#include "config.h"
#include "clutter-backend-x11.h"
#include "clutter-x11.h"
#include "clutter-backend-private.h"
#include "clutter-debug.h"
#include "clutter-event-private.h"
#include "clutter-main.h"
#include <string.h>
#include <glib.h>
#if 0
/* XEMBED protocol support for toolkit embedding */
#define XEMBED_MAPPED (1 << 0)
#define MAX_SUPPORTED_XEMBED_VERSION 1
#define XEMBED_EMBEDDED_NOTIFY 0
#define XEMBED_WINDOW_ACTIVATE 1
#define XEMBED_WINDOW_DEACTIVATE 2
#define XEMBED_REQUEST_FOCUS 3
#define XEMBED_FOCUS_IN 4
#define XEMBED_FOCUS_OUT 5
#define XEMBED_FOCUS_NEXT 6
#define XEMBED_FOCUS_PREV 7
/* 8-9 were used for XEMBED_GRAB_KEY/XEMBED_UNGRAB_KEY */
#define XEMBED_MODALITY_ON 10
#define XEMBED_MODALITY_OFF 11
#define XEMBED_REGISTER_ACCELERATOR 12
#define XEMBED_UNREGISTER_ACCELERATOR 13
#define XEMBED_ACTIVATE_ACCELERATOR 14
static Window ParentEmbedderWin = None;
#endif
typedef struct _ClutterEventSource ClutterEventSource;
struct _ClutterEventSource
{
GSource source;
ClutterBackend *backend;
GPollFD event_poll_fd;
};
ClutterEventX11 *
_clutter_event_x11_new (void)
{
return g_slice_new0 (ClutterEventX11);
}
ClutterEventX11 *
_clutter_event_x11_copy (ClutterEventX11 *event_x11)
{
if (event_x11 != NULL)
return g_slice_dup (ClutterEventX11, event_x11);
return NULL;
}
void
_clutter_event_x11_free (ClutterEventX11 *event_x11)
{
if (event_x11 != NULL)
g_slice_free (ClutterEventX11, event_x11);
}
static gboolean clutter_event_prepare (GSource *source,
gint *timeout);
static gboolean clutter_event_check (GSource *source);
static gboolean clutter_event_dispatch (GSource *source,
GSourceFunc callback,
gpointer user_data);
static GList *event_sources = NULL;
static GSourceFuncs event_funcs = {
clutter_event_prepare,
clutter_event_check,
clutter_event_dispatch,
NULL
};
static GSource *
clutter_event_source_new (ClutterBackend *backend)
{
GSource *source = g_source_new (&event_funcs, sizeof (ClutterEventSource));
ClutterEventSource *event_source = (ClutterEventSource *) source;
event_source->backend = backend;
return source;
}
static gboolean
check_xpending (ClutterBackend *backend)
{
return XPending (CLUTTER_BACKEND_X11 (backend)->xdpy);
}
#if 0
static gboolean
xembed_send_message (ClutterBackendX11 *backend_x11,
Window window,
long message,
long detail,
long data1,
long data2)
{
XEvent ev;
memset (&ev, 0, sizeof (ev));
ev.xclient.type = ClientMessage;
ev.xclient.window = window;
ev.xclient.message_type = backend_x11->atom_XEMBED;
ev.xclient.format = 32;
ev.xclient.data.l[0] = CurrentTime;
ev.xclient.data.l[1] = message;
ev.xclient.data.l[2] = detail;
ev.xclient.data.l[3] = data1;
ev.xclient.data.l[4] = data2;
clutter_x11_trap_x_errors ();
XSendEvent (backend_x11->xdpy, window, False, NoEventMask, &ev);
XSync (backend_x11->xdpy, False);
if (clutter_x11_untrap_x_errors ())
return False;
return True;
}
static void
xembed_set_info (ClutterBackendX11 *backend_x11,
Window window,
gint flags)
{
gint32 list[2];
list[0] = MAX_SUPPORTED_XEMBED_VERSION;
list[1] = XEMBED_MAPPED;
XChangeProperty (backend_x11->xdpy, window,
backend_x11->atom_XEMBED_INFO,
backend_x11->atom_XEMBED_INFO, 32,
PropModeReplace, (unsigned char *) list, 2);
}
#endif
void
_clutter_backend_x11_events_init (ClutterBackend *backend)
{
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
GSource *source;
ClutterEventSource *event_source;
int connection_number;
gchar *name;
connection_number = ConnectionNumber (backend_x11->xdpy);
CLUTTER_NOTE (EVENT, "Connection number: %d", connection_number);
source = backend_x11->event_source = clutter_event_source_new (backend);
event_source = (ClutterEventSource *) source;
g_source_set_priority (source, CLUTTER_PRIORITY_EVENTS);
name = g_strdup_printf ("Clutter X11 Event (connection: %d)",
connection_number);
g_source_set_name (source, name);
g_free (name);
event_source->event_poll_fd.fd = connection_number;
event_source->event_poll_fd.events = G_IO_IN;
event_sources = g_list_prepend (event_sources, event_source);
g_source_add_poll (source, &event_source->event_poll_fd);
g_source_set_can_recurse (source, TRUE);
g_source_attach (source, NULL);
}
void
_clutter_backend_x11_events_uninit (ClutterBackend *backend)
{
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
if (backend_x11->event_source)
{
CLUTTER_NOTE (EVENT, "Destroying the event source");
event_sources = g_list_remove (event_sources,
backend_x11->event_source);
g_source_destroy (backend_x11->event_source);
g_source_unref (backend_x11->event_source);
backend_x11->event_source = NULL;
}
}
static void
events_queue (ClutterBackend *backend)
{
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
Display *xdisplay = backend_x11->xdpy;
ClutterEvent *event;
XEvent xevent;
while (!clutter_events_pending () && XPending (xdisplay))
{
XNextEvent (xdisplay, &xevent);
event = clutter_event_new (CLUTTER_NOTHING);
#ifdef HAVE_XGE
XGetEventData (xdisplay, &xevent.xcookie);
#endif
if (_clutter_backend_translate_event (backend, &xevent, event))
_clutter_event_push (event, FALSE);
else
clutter_event_free (event);
#ifdef HAVE_XGE
XFreeEventData (xdisplay, &xevent.xcookie);
#endif
}
}
/**
* clutter_x11_handle_event:
* @xevent: pointer to XEvent structure
*
* This function processes a single X event; it can be used to hook
* into external X11 event processing (for example, a GDK filter
* function).
*
* If clutter_x11_disable_event_retrieval() has been called, you must
* let this function process events to update Clutter's internal state.
*
* Return value: #ClutterX11FilterReturn. %CLUTTER_X11_FILTER_REMOVE
* indicates that Clutter has internally handled the event and the
* caller should do no further processing. %CLUTTER_X11_FILTER_CONTINUE
* indicates that Clutter is either not interested in the event,
* or has used the event to update internal state without taking
* any exclusive action. %CLUTTER_X11_FILTER_TRANSLATE will not
* occur.
*
* Since: 0.8
*/
ClutterX11FilterReturn
clutter_x11_handle_event (XEvent *xevent)
{
ClutterX11FilterReturn result;
ClutterBackend *backend;
ClutterEvent *event;
gint spin = 1;
#ifdef HAVE_XGE
ClutterBackendX11 *backend_x11;
Display *xdisplay;
gboolean allocated_event;
#endif
/* The return values here are someone approximate; we return
* CLUTTER_X11_FILTER_REMOVE if a clutter event is
* generated for the event. This mostly, but not entirely,
* corresponds to whether other event processing should be
* excluded. As long as the stage window is not shared with another
* toolkit it should be safe, and never return
* %CLUTTER_X11_FILTER_REMOVE when more processing is needed.
*/
result = CLUTTER_X11_FILTER_CONTINUE;
clutter_threads_enter ();
backend = clutter_get_default_backend ();
event = clutter_event_new (CLUTTER_NOTHING);
#ifdef HAVE_XGE
backend_x11 = CLUTTER_BACKEND_X11 (backend);
xdisplay = backend_x11->xdpy;
allocated_event = XGetEventData (xdisplay, &xevent->xcookie);
#endif
if (_clutter_backend_translate_event (backend, xevent, event))
{
_clutter_event_push (event, FALSE);
result = CLUTTER_X11_FILTER_REMOVE;
}
else
{
clutter_event_free (event);
goto out;
}
/*
* Motion events can generate synthetic enter and leave events, so if we
* are processing a motion event, we need to spin the event loop at least
* two extra times to pump the enter/leave events through (otherwise they
* just get pushed down the queue and never processed).
*/
if (event->type == CLUTTER_MOTION)
spin += 2;
while (spin > 0 && (event = clutter_event_get ()))
{
/* forward the event into clutter for emission etc. */
clutter_do_event (event);
clutter_event_free (event);
--spin;
}
out:
#ifdef HAVE_XGE
if (allocated_event)
XFreeEventData (xdisplay, &xevent->xcookie);
#endif
clutter_threads_leave ();
return result;
}
static gboolean
clutter_event_prepare (GSource *source,
gint *timeout)
{
ClutterBackend *backend = ((ClutterEventSource *) source)->backend;
gboolean retval;
clutter_threads_enter ();
*timeout = -1;
retval = (clutter_events_pending () || check_xpending (backend));
clutter_threads_leave ();
return retval;
}
static gboolean
clutter_event_check (GSource *source)
{
ClutterEventSource *event_source = (ClutterEventSource *) source;
ClutterBackend *backend = event_source->backend;
gboolean retval;
clutter_threads_enter ();
if (event_source->event_poll_fd.revents & G_IO_IN)
retval = (clutter_events_pending () || check_xpending (backend));
else
retval = FALSE;
clutter_threads_leave ();
return retval;
}
static gboolean
clutter_event_dispatch (GSource *source,
GSourceFunc callback,
gpointer user_data)
{
ClutterBackend *backend = ((ClutterEventSource *) source)->backend;
ClutterEvent *event;
clutter_threads_enter ();
/* Grab the event(s), translate and figure out double click.
* The push onto queue (stack) if valid.
*/
events_queue (backend);
/* Pop an event off the queue if any */
event = clutter_event_get ();
if (event != NULL)
{
/* forward the event into clutter for emission etc. */
clutter_do_event (event);
clutter_event_free (event);
}
clutter_threads_leave ();
return TRUE;
}
/**
* clutter_x11_get_current_event_time: (skip)
*
* Retrieves the timestamp of the last X11 event processed by
* Clutter. This might be different from the timestamp returned
* by clutter_get_current_event_time(), as Clutter may synthesize
* or throttle events.
*
* Return value: a timestamp, in milliseconds
*
* Since: 1.0
*/
Time
clutter_x11_get_current_event_time (void)
{
ClutterBackend *backend = clutter_get_default_backend ();
return CLUTTER_BACKEND_X11 (backend)->last_event_time;
}
/**
* clutter_x11_event_get_key_group:
* @event: a #ClutterEvent of type %CLUTTER_KEY_PRESS or %CLUTTER_KEY_RELEASE
*
* Retrieves the group for the modifiers set in @event
*
* Return value: the group id
*
* Since: 1.4
*/
gint
clutter_x11_event_get_key_group (const ClutterEvent *event)
{
ClutterEventX11 *event_x11;
g_return_val_if_fail (event != NULL, 0);
g_return_val_if_fail (event->type == CLUTTER_KEY_PRESS ||
event->type == CLUTTER_KEY_RELEASE, 0);
event_x11 = _clutter_event_get_platform_data (event);
if (event_x11 == NULL)
return 0;
return event_x11->key_group;
}