/* Clutter. * An OpenGL based 'interactive canvas' library. * Authored By Matthew Allum * 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #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 #include #ifdef HAVE_XFIXES #include #endif #include #ifdef USE_XINPUT #include #endif /* 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; 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 *) ×tamp, 1); } } #if 0 /* See XInput keyboard comment below USE_XINPUT */ static void convert_xdevicekey_to_xkey (XDeviceKeyEvent *xkev, XEvent *xevent) { xevent->xany.type = xevent->xkey.type = xkev->type; xevent->xkey.serial = xkev->serial; xevent->xkey.display = xkev->display; xevent->xkey.window = xkev->window; xevent->xkey.root = xkev->root; xevent->xkey.subwindow = xkev->subwindow; xevent->xkey.time = xkev->time; xevent->xkey.x = xkev->x; xevent->xkey.y = xkev->y; xevent->xkey.x_root = xkev->x_root; xevent->xkey.y_root = xkev->y_root; xevent->xkey.state = xkev->state; xevent->xkey.keycode = xkev->keycode; xevent->xkey.same_screen = xkev->same_screen; } #endif /* USE_XINPUT */ static void translate_key_event (ClutterBackend *backend, ClutterEvent *event, XEvent *xevent) { char buffer[256+1]; int n; CLUTTER_NOTE (EVENT, "Translating key %s event", xevent->xany.type == KeyPress ? "press" : "release"); event->key.time = xevent->xkey.time; event->key.modifier_state = (ClutterModifierType) xevent->xkey.state; event->key.hardware_keycode = xevent->xkey.keycode; /* keyval is the key ignoring all modifiers ('1' vs. '!') */ event->key.keyval = XKeycodeToKeysym (xevent->xkey.display, xevent->xkey.keycode, 0); /* unicode_value is the printable representation */ n = XLookupString (&xevent->xkey, buffer, sizeof (buffer) - 1, NULL, NULL); if (n != NoSymbol) { event->key.unicode_value = g_utf8_get_char_validated (buffer, n); if ((event->key.unicode_value != -1) && (event->key.unicode_value != -2)) return; } event->key.unicode_value = (gunichar)'\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, not_yet_handled = FALSE; 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_NOTE (BACKEND, "%s: ConfigureNotify[%x] (%d, %d)", G_STRLOC, (unsigned int) stage_x11->xwin, xevent->xconfigure.width, xevent->xconfigure.height); clutter_actor_set_size (CLUTTER_ACTOR (stage), xevent->xconfigure.width, xevent->xconfigure.height); stage_x11->handling_configure = FALSE; /* the resize process is complete, so we can ask the stage * to set up the GL viewport with the new size */ CLUTTER_SET_PRIVATE_FLAGS (CLUTTER_ACTOR (stage_x11->wrapper), CLUTTER_ACTOR_SYNC_MATRICES); } 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: { CLUTTER_NOTE (MULTISTAGE, "expose for stage: %p, redrawing", stage); clutter_actor_queue_redraw (CLUTTER_ACTOR (stage)); res = FALSE; } 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; case KeyPress: event->key.type = event->type = CLUTTER_KEY_PRESS; translate_key_event (backend, event, xevent); set_user_time (backend_x11, &xwindow, xevent->xkey.time); break; case KeyRelease: event->key.type = event->type = CLUTTER_KEY_RELEASE; translate_key_event (backend, event, xevent); break; default: /* ignore every other event */ not_yet_handled = TRUE; break; } /* Input device event handling.. */ if (not_yet_handled) { if (!clutter_x11_has_xinput ()) { /* Regular X event */ switch (xevent->type) { /* KeyPress / KeyRelease should reside here if XInput * worked properly */ 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; default: /* ignore every other event */ res = FALSE; break; } } else { /* XInput fun.. Needs clean up. */ #ifdef USE_XINPUT int *ev_types = backend_x11->event_types; CLUTTER_NOTE (EVENT, "XInput event type: %d", xevent->type); if (xevent->type == ev_types [CLUTTER_X11_XINPUT_BUTTON_PRESS_EVENT]) { XDeviceButtonEvent *xbev = (XDeviceButtonEvent *)xevent; switch (xbev->button) { case 4: case 5: case 6: case 7: event->scroll.type = event->type = CLUTTER_SCROLL; if (xbev->button == 4) event->scroll.direction = CLUTTER_SCROLL_UP; else if (xbev->button == 5) event->scroll.direction = CLUTTER_SCROLL_DOWN; else if (xbev->button == 6) event->scroll.direction = CLUTTER_SCROLL_LEFT; else event->scroll.direction = CLUTTER_SCROLL_RIGHT; event->scroll.time = xbev->time; event->scroll.x = xbev->x; event->scroll.y = xbev->y; event->scroll.modifier_state = xbev->state; event->scroll.device = (ClutterInputDevice *)_clutter_x11_get_device_for_xid (xbev->deviceid); break; default: event->button.type = event->type = CLUTTER_BUTTON_PRESS; event->button.time = xbev->time; event->button.x = xbev->x; event->button.y = xbev->y; event->button.modifier_state = xbev->state; event->button.button = xbev->button; event->button.device = (ClutterInputDevice *)_clutter_x11_get_device_for_xid (xbev->deviceid); break; } set_user_time (backend_x11, &xwindow, xbev->time); CLUTTER_NOTE(EVENT, "XINPUT Button press event for %li %d %d", xbev->deviceid, xbev->x, xbev->y); } else if (xevent->type == ev_types[CLUTTER_X11_XINPUT_BUTTON_RELEASE_EVENT]) { XDeviceButtonEvent *xbev = (XDeviceButtonEvent *)xevent; /* scroll events don't have a corresponding release */ if (xbev->button == 4 || xbev->button == 5 || xbev->button == 6 || xbev->button == 7) { res = FALSE; goto out; } event->button.type = event->type = CLUTTER_BUTTON_RELEASE; event->button.time = xbev->time; event->button.x = xbev->x; event->button.y = xbev->y; event->button.modifier_state = xbev->state; event->button.button = xbev->button; event->button.device = (ClutterInputDevice *)_clutter_x11_get_device_for_xid (xbev->deviceid); CLUTTER_NOTE(EVENT, "XINPUT Button release event for %li %d %d", xbev->deviceid, xbev->x, xbev->y); } else if (xevent->type == ev_types [CLUTTER_X11_XINPUT_MOTION_NOTIFY_EVENT]) { XDeviceMotionEvent *xmev = (XDeviceMotionEvent *)xevent; event->motion.type = event->type = CLUTTER_MOTION; event->motion.time = xmev->time; event->motion.x = xmev->x; event->motion.y = xmev->y; event->motion.modifier_state = xmev->state; event->motion.device = (ClutterInputDevice *) _clutter_x11_get_device_for_xid (xmev->deviceid); CLUTTER_NOTE(EVENT, "XINPUT Motion event for %li %d %d", xmev->deviceid, xmev->x, xmev->y); } #if 0 /* the Xinput handling of key presses/releases disabled for now since * it makes keyrepeat, and key presses and releases outside the window * not generate events even when the window has focus */ else if (xevent->type == ev_types [CLUTTER_X11_XINPUT_KEY_PRESS_EVENT]) { XEvent xevent_converted; XDeviceKeyEvent *xkev = (XDeviceKeyEvent *)xevent; convert_xdevicekey_to_xkey (xkev, &xevent_converted); event->key.type = event->type = CLUTTER_KEY_PRESS; translate_key_event (backend, event, &xevent_converted); set_user_time (backend_x11, &xwindow, xkev->time); } else if (xevent->type == ev_types [CLUTTER_X11_XINPUT_KEY_RELEASE_EVENT]) { XEvent xevent_converted; XDeviceKeyEvent *xkev = (XDeviceKeyEvent *)xevent; convert_xdevicekey_to_xkey (xkev, &xevent_converted); event->key.type = event->type = CLUTTER_KEY_RELEASE; translate_key_event (backend, event, &xevent_converted); } #endif else #endif { CLUTTER_NOTE (EVENT, "Uknown Event"); res = FALSE; } } } out: 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 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) { ClutterBackend *backend; ClutterEvent *event; ClutterMainContext *clutter_context; ClutterX11FilterReturn result; /* The return values here are someone approximate; we return * CLUTTER_X11_FILTER_REMOVE if and only 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 (); 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 */ result = CLUTTER_X11_FILTER_REMOVE; g_queue_push_head (clutter_context->events_queue, event); } else { clutter_event_free (event); goto out; } event = clutter_event_get (); if (event) { /* forward the event into clutter for emission etc. */ clutter_do_event (event); clutter_event_free (event); } out: 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) { /* forward the event into clutter for emission etc. */ clutter_do_event (event); clutter_event_free (event); } clutter_threads_leave (); return TRUE; }