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mutter/clutter/x11/clutter-event-x11.c
Emmanuele Bassi f859135082 2008-04-04 Emmanuele Bassi <ebassi@openedhand.com> 
Bug #864 - Allow instantiating and subclassing of ClutterStage

	* clutter/Makefile.am: Add clutter-stage-window.[ch]

	* clutter/clutter-stage-manager.c:
	(_clutter_stage_manager_remove_stage): Do not warn if removing
	a stage we don't manage, as we might be invoked multiple times
	during a ClutterState dispose sequence.

	* clutter/clutter-actor.c:
	* clutter/clutter-backend.[ch]:
	* clutter/clutter-main.c:
	* clutter/clutter-private.h:
	* clutter/clutter-stage.[ch]: Make ClutterStage a proxy actor,
	with a private actor implementing the ClutterStageWindow
	interface for handling the per-backend realization, painting
	and unrealization, plus all the windowing system abstraction.

	* clutter/x11/clutter-event-x11.c:
	* clutter/x11/clutter-stage-x11.[ch]: Port the X11 backend
	to the new backend and stage API and semantics.

	* clutter/glx/clutter-backend-glx.c:
	* clutter/glx/clutter-stage-glx.c: Port the GLX backend to
	the new backend and stage API and semantics.

	* clutter/eglx/clutter-backend-egl.[ch]:
	* clutter/eglx/clutter-stage-egl.[ch]: Port the EGLX backend
	to the new backend and stage API and semantics (untested).

	* tests/test-multistage.c (on_button_press): Rename
	clutter_stage_create_new() to clutter_stage_new().
2008-04-04 15:02:11 +00:00

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/* Clutter.
* An OpenGL based 'interactive canvas' library.
* Authored By Matthew Allum <mallum@openedhand.com>
* Copyright (C) 2006-2007 OpenedHand
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "clutter-stage-x11.h"
#include "clutter-backend-x11.h"
#include "clutter-x11.h"
#include "../clutter-backend.h"
#include "../clutter-event.h"
#include "../clutter-private.h"
#include "../clutter-debug.h"
#include "../clutter-main.h"
#include <string.h>
#include <glib.h>
#ifdef HAVE_XFIXES
#include <X11/extensions/Xfixes.h>
#endif
#include <X11/Xatom.h>
/* 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;
typedef struct _ClutterEventSource ClutterEventSource;
struct _ClutterEventSource
{
GSource source;
ClutterBackend *backend;
GPollFD event_poll_fd;
};
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);
}
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);
}
void
_clutter_backend_x11_events_init (ClutterBackend *backend)
{
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
GSource *source;
ClutterEventSource *event_source;
int connection_number;
if (backend_x11->no_xevent_retrieval)
return;
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);
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
set_user_time (ClutterBackendX11 *backend_x11,
Window *xwindow,
long timestamp)
{
if (timestamp != CLUTTER_CURRENT_TIME)
{
XChangeProperty (backend_x11->xdpy, *xwindow,
backend_x11->atom_NET_WM_USER_TIME,
XA_CARDINAL, 32, PropModeReplace,
(unsigned char *) &timestamp, 1);
}
}
static void
translate_key_event (ClutterBackend *backend,
ClutterEvent *event,
XEvent *xevent)
{
CLUTTER_NOTE (EVENT, "Translating key %s event",
xevent->xany.type == KeyPress ? "press" : "release");
event->key.type = (xevent->xany.type == KeyPress) ? CLUTTER_KEY_PRESS
: CLUTTER_KEY_RELEASE;
event->key.time = xevent->xkey.time;
event->key.modifier_state = (ClutterModifierType) xevent->xkey.state;
event->key.hardware_keycode = xevent->xkey.keycode;
/* FIXME: We need to handle other modifiers rather than just shift */
event->key.keyval =
XKeycodeToKeysym (xevent->xkey.display,
xevent->xkey.keycode,
(event->key.modifier_state & CLUTTER_SHIFT_MASK) ? 1
: 0);
}
static gboolean
handle_wm_protocols_event (ClutterBackendX11 *backend_x11,
Window window,
XEvent *xevent)
{
Atom atom = (Atom) xevent->xclient.data.l[0];
if (atom == backend_x11->atom_WM_DELETE_WINDOW &&
xevent->xany.window == window)
{
/* the WM_DELETE_WINDOW is a request: we do not destroy
* the window right away, as it might contain vital data;
* we relay the event to the application and we let it
* handle the request
*/
CLUTTER_NOTE (EVENT, "delete window:\txid: %ld",
xevent->xclient.window);
set_user_time (backend_x11,
&window,
xevent->xclient.data.l[1]);
return TRUE;
}
else if (atom == backend_x11->atom_NET_WM_PING &&
xevent->xany.window == window)
{
XClientMessageEvent xclient = xevent->xclient;
xclient.window = backend_x11->xwin_root;
XSendEvent (backend_x11->xdpy, xclient.window,
False,
SubstructureRedirectMask | SubstructureNotifyMask,
(XEvent *) &xclient);
return FALSE;
}
/* do not send any of the WM_PROTOCOLS events to the queue */
return FALSE;
}
static gboolean
handle_xembed_event (ClutterBackendX11 *backend_x11,
XEvent *xevent)
{
ClutterActor *stage;
stage = clutter_stage_get_default ();
switch (xevent->xclient.data.l[1])
{
case XEMBED_EMBEDDED_NOTIFY:
CLUTTER_NOTE (EVENT, "got XEMBED_EMBEDDED_NOTIFY from %lx",
xevent->xclient.data.l[3]);
ParentEmbedderWin = xevent->xclient.data.l[3];
clutter_actor_realize (stage);
clutter_actor_show (stage);
xembed_set_info (backend_x11,
clutter_x11_get_stage_window (CLUTTER_STAGE (stage)),
XEMBED_MAPPED);
break;
case XEMBED_WINDOW_ACTIVATE:
CLUTTER_NOTE (EVENT, "got XEMBED_WINDOW_ACTIVATE");
break;
case XEMBED_WINDOW_DEACTIVATE:
CLUTTER_NOTE (EVENT, "got XEMBED_WINDOW_DEACTIVATE");
break;
case XEMBED_FOCUS_IN:
CLUTTER_NOTE (EVENT, "got XEMBED_FOCUS_IN");
if (ParentEmbedderWin)
xembed_send_message (backend_x11, ParentEmbedderWin,
XEMBED_FOCUS_NEXT,
0, 0, 0);
break;
default:
CLUTTER_NOTE (EVENT, "got unknown XEMBED message");
break;
}
/* do not propagate the XEMBED events to the stage */
return FALSE;
}
static gboolean
event_translate (ClutterBackend *backend,
ClutterEvent *event,
XEvent *xevent)
{
ClutterBackendX11 *backend_x11;
ClutterStageX11 *stage_x11;
ClutterStage *stage;
ClutterStageWindow *impl;
gboolean res;
Window xwindow, stage_xwindow;
backend_x11 = CLUTTER_BACKEND_X11 (backend);
xwindow = xevent->xany.window;
if (backend_x11->event_filters)
{
GSList *node;
ClutterX11EventFilter *filter;
node = backend_x11->event_filters;
while (node)
{
filter = node->data;
switch (filter->func (xevent, event, filter->data))
{
case CLUTTER_X11_FILTER_CONTINUE:
break;
case CLUTTER_X11_FILTER_TRANSLATE:
return TRUE;
case CLUTTER_X11_FILTER_REMOVE:
return FALSE;
default:
break;
}
node = node->next;
}
}
/*
* Do further processing only on events for the stage window
* (the x11 filters might be getting events for other windows, so do not
* mess them about.
*/
stage = clutter_x11_get_stage_from_window (xwindow);
if (stage == NULL)
return FALSE;
impl = _clutter_stage_get_window (stage);
stage_x11 = CLUTTER_STAGE_X11 (impl);
stage_xwindow = xwindow; /* clutter_x11_get_stage_window (stage); */
event->any.stage = stage;
res = TRUE;
switch (xevent->type)
{
case ConfigureNotify:
if (!stage_x11->is_foreign_xwin)
{
/* Set a flag so that the stage will know the actor is being
resized in response to the window size changing as
opposed to a request from the application. This prevents
it from trying to resize the window again */
stage_x11->handling_configure = TRUE;
clutter_actor_set_size (CLUTTER_ACTOR (stage),
xevent->xconfigure.width,
xevent->xconfigure.height);
stage_x11->handling_configure = FALSE;
}
res = FALSE;
break;
case PropertyNotify:
if (xevent->xproperty.atom == backend_x11->atom_NET_WM_STATE &&
xevent->xproperty.window == stage_xwindow &&
!stage_x11->is_foreign_xwin)
{
Atom type;
gint format;
gulong n_items, bytes_after;
guchar *data = NULL;
gboolean fullscreen_set = FALSE;
clutter_x11_trap_x_errors ();
XGetWindowProperty (backend_x11->xdpy, stage_xwindow,
backend_x11->atom_NET_WM_STATE,
0, G_MAXLONG,
False, XA_ATOM,
&type, &format, &n_items,
&bytes_after, &data);
clutter_x11_untrap_x_errors ();
if (type != None && data != NULL)
{
Atom *atoms = (Atom *) data;
gulong i;
gboolean is_fullscreen = FALSE;
for (i = 0; i < n_items; i++)
{
if (atoms[i] == backend_x11->atom_NET_WM_STATE_FULLSCREEN)
fullscreen_set = TRUE;
}
is_fullscreen =
(stage_x11->state & CLUTTER_STAGE_STATE_FULLSCREEN);
if (fullscreen_set != is_fullscreen)
{
if (fullscreen_set)
stage_x11->state |= CLUTTER_STAGE_STATE_FULLSCREEN;
else
stage_x11->state &= ~CLUTTER_STAGE_STATE_FULLSCREEN;
event->type = CLUTTER_STAGE_STATE;
event->stage_state.changed_mask =
CLUTTER_STAGE_STATE_FULLSCREEN;
event->stage_state.new_state = stage_x11->state;
}
else
res = FALSE;
XFree (data);
}
else
res = FALSE;
}
else
res = FALSE;
break;
case MapNotify:
clutter_stage_x11_map (stage_x11);
res = FALSE;
break;
case UnmapNotify:
clutter_stage_x11_unmap (stage_x11);
res = FALSE;
break;
case FocusIn:
if (!(stage_x11->state & CLUTTER_STAGE_STATE_ACTIVATED))
{
/* TODO: check xevent->xfocus.detail ? */
stage_x11->state |= CLUTTER_STAGE_STATE_ACTIVATED;
event->type = CLUTTER_STAGE_STATE;
event->stage_state.changed_mask = CLUTTER_STAGE_STATE_ACTIVATED;
event->stage_state.new_state = stage_x11->state;
}
else
res = FALSE;
break;
case FocusOut:
if (stage_x11->state & CLUTTER_STAGE_STATE_ACTIVATED)
{
stage_x11->state &= ~CLUTTER_STAGE_STATE_ACTIVATED;
event->type = CLUTTER_STAGE_STATE;
event->stage_state.changed_mask = CLUTTER_STAGE_STATE_ACTIVATED;
event->stage_state.new_state = stage_x11->state;
}
else
res = FALSE;
break;
case Expose:
{
XEvent foo_xev;
/* Cheap compress */
while (XCheckTypedWindowEvent (backend_x11->xdpy,
xevent->xexpose.window,
Expose,
&foo_xev));
/* FIXME: need to make stage an 'actor' so can que
* a paint direct from there rather than hack here...
*/
CLUTTER_NOTE (MULTISTAGE, "expose for stage:%p, redrawing", stage);
clutter_redraw (stage);
res = FALSE;
}
break;
case KeyPress:
event->type = CLUTTER_KEY_PRESS;
translate_key_event (backend, event, xevent);
set_user_time (backend_x11, &xwindow, xevent->xkey.time);
break;
case KeyRelease:
event->type = CLUTTER_KEY_RELEASE;
translate_key_event (backend, event, xevent);
break;
case ButtonPress:
switch (xevent->xbutton.button)
{
case 4: /* up */
case 5: /* down */
case 6: /* left */
case 7: /* right */
event->scroll.type = event->type = CLUTTER_SCROLL;
if (xevent->xbutton.button == 4)
event->scroll.direction = CLUTTER_SCROLL_UP;
else if (xevent->xbutton.button == 5)
event->scroll.direction = CLUTTER_SCROLL_DOWN;
else if (xevent->xbutton.button == 6)
event->scroll.direction = CLUTTER_SCROLL_LEFT;
else
event->scroll.direction = CLUTTER_SCROLL_RIGHT;
event->scroll.time = xevent->xbutton.time;
event->scroll.x = xevent->xbutton.x;
event->scroll.y = xevent->xbutton.y;
event->scroll.modifier_state = xevent->xbutton.state;
break;
default:
event->button.type = event->type = CLUTTER_BUTTON_PRESS;
event->button.time = xevent->xbutton.time;
event->button.x = xevent->xbutton.x;
event->button.y = xevent->xbutton.y;
event->button.modifier_state = xevent->xbutton.state;
event->button.button = xevent->xbutton.button;
break;
}
set_user_time (backend_x11, &xwindow, event->button.time);
break;
case ButtonRelease:
/* scroll events don't have a corresponding release */
if (xevent->xbutton.button == 4 ||
xevent->xbutton.button == 5 ||
xevent->xbutton.button == 6 ||
xevent->xbutton.button == 7)
{
res = FALSE;
break;
}
event->button.type = event->type = CLUTTER_BUTTON_RELEASE;
event->button.time = xevent->xbutton.time;
event->button.x = xevent->xbutton.x;
event->button.y = xevent->xbutton.y;
event->button.modifier_state = xevent->xbutton.state;
event->button.button = xevent->xbutton.button;
break;
case MotionNotify:
event->motion.type = event->type = CLUTTER_MOTION;
event->motion.time = xevent->xmotion.time;
event->motion.x = xevent->xmotion.x;
event->motion.y = xevent->xmotion.y;
event->motion.modifier_state = xevent->xmotion.state;
break;
case DestroyNotify:
CLUTTER_NOTE (EVENT, "destroy notify:\txid: %ld",
xevent->xdestroywindow.window);
if (xevent->xdestroywindow.window == stage_xwindow &&
!stage_x11->is_foreign_xwin)
event->type = event->any.type = CLUTTER_DESTROY_NOTIFY;
else
res = FALSE;
break;
case ClientMessage:
CLUTTER_NOTE (EVENT, "client message");
event->type = event->any.type = CLUTTER_CLIENT_MESSAGE;
if (xevent->xclient.message_type == backend_x11->atom_XEMBED)
res = handle_xembed_event (backend_x11, xevent);
else if (xevent->xclient.message_type == backend_x11->atom_WM_PROTOCOLS)
{
res = handle_wm_protocols_event (backend_x11, stage_xwindow, xevent);
event->type = event->any.type = CLUTTER_DELETE;
}
break;
default:
/* ignore every other event */
res = FALSE;
break;
}
return res;
}
static void
events_queue (ClutterBackend *backend)
{
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
ClutterEvent *event;
Display *xdisplay = backend_x11->xdpy;
XEvent xevent;
ClutterMainContext *clutter_context;
clutter_context = clutter_context_get_default ();
while (!clutter_events_pending () && XPending (xdisplay))
{
XNextEvent (xdisplay, &xevent);
event = clutter_event_new (CLUTTER_NOTHING);
if (event_translate (backend, event, &xevent))
{
/* push directly here to avoid copy of queue_put */
g_queue_push_head (clutter_context->events_queue, event);
}
else
{
clutter_event_free (event);
}
}
}
/**
* clutter_x11_handle_event
* @xevent: pointer to XEvent structure
*
* This function processes a single X event; it can be used to hook
* into external X event retrieval (for example that done by GDK).
*
* Return: #ClutterX11FilterReturn indicating what the caller should
* do with the original event.
*
* Since: 0.8
*/
ClutterX11FilterReturn
clutter_x11_handle_event (XEvent *xevent)
{
ClutterBackend *backend;
ClutterEvent *event;
ClutterMainContext *clutter_context;
clutter_threads_enter ();
clutter_context = clutter_context_get_default ();
backend = clutter_context->backend;
event = clutter_event_new (CLUTTER_NOTHING);
if (event_translate (backend, event, xevent))
{
/* push directly here to avoid copy of queue_put */
g_queue_push_head (clutter_context->events_queue, event);
}
else
{
clutter_event_free (event);
}
event = clutter_event_get ();
if (event)
{
/* forward the event into clutter for emission etc. */
clutter_do_event (event);
clutter_event_free (event);
}
clutter_threads_leave ();
return CLUTTER_X11_FILTER_CONTINUE;
}
/**
* clutter_x11_disable_event_retrieval
*
* Disables retrieval of X events in the main loop. Use to create event-less
* canvas or in conjunction with clutter_x11_handle_event.
*
* This function can only be called before calling clutter_init().
*
* Since: 0.8
*/
void
clutter_x11_disable_event_retrieval (void)
{
ClutterBackendX11 *backend;
ClutterMainContext *clutter_context;
clutter_context = clutter_context_get_default ();
backend = CLUTTER_BACKEND_X11 (clutter_context->backend);
backend->no_xevent_retrieval = TRUE;
}
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)
{
/* forward the event into clutter for emission etc. */
clutter_do_event (event);
clutter_event_free (event);
}
clutter_threads_leave ();
return TRUE;
}
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