forked from AuroraMiddleware/gtk
fb0fdddd76
We now have a GdkX11Display::xevent signal that gets emitted for every XEvent and allows you to interrupt processing via TRUE/FALSE return values. These return values to correspond to GDK_FILTER_REMOVE and GDK_FILTER_CONTINUE respectively. The GDK_FILTER_TRANSLATE case from gdk_window_add_filter() is now meant to be handled via gdk_display_put_event().
596 lines
16 KiB
C
596 lines
16 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 2009 Carlos Garnacho <carlosg@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gdkeventsource.h"
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#include "gdkinternals.h"
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#include "gdkwindow-x11.h"
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#include "gdkprivate-x11.h"
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#include "xsettings-client.h"
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static gboolean gdk_event_source_prepare (GSource *source,
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gint *timeout);
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static gboolean gdk_event_source_check (GSource *source);
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static gboolean gdk_event_source_dispatch (GSource *source,
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GSourceFunc callback,
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gpointer user_data);
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static void gdk_event_source_finalize (GSource *source);
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static GQuark quark_needs_enter = 0;
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#define HAS_FOCUS(toplevel) \
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((toplevel)->has_focus || (toplevel)->has_pointer_focus)
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struct _GdkEventSource
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{
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GSource source;
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GdkDisplay *display;
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GPollFD event_poll_fd;
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GList *translators;
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};
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static GSourceFuncs event_funcs = {
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gdk_event_source_prepare,
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gdk_event_source_check,
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gdk_event_source_dispatch,
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gdk_event_source_finalize
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};
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static gint
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gdk_event_apply_filters (const XEvent *xevent,
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GdkEvent *event,
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GdkWindow *window)
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{
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GList *tmp_list;
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GdkFilterReturn result;
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if (window == NULL)
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tmp_list = _gdk_default_filters;
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else
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tmp_list = window->filters;
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while (tmp_list)
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{
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GdkEventFilter *filter = (GdkEventFilter*) tmp_list->data;
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GList *node;
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if ((filter->flags & GDK_EVENT_FILTER_REMOVED) != 0)
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{
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tmp_list = tmp_list->next;
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continue;
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}
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filter->ref_count++;
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result = filter->function ((GdkXEvent *) xevent, event, filter->data);
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/* Protect against unreffing the filter mutating the list */
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node = tmp_list->next;
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_gdk_event_filter_unref (window, filter);
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tmp_list = node;
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if (result != GDK_FILTER_CONTINUE)
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return result;
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}
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return GDK_FILTER_CONTINUE;
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}
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static GdkWindow *
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gdk_event_source_get_filter_window (GdkEventSource *event_source,
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const XEvent *xevent,
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GdkEventTranslator **event_translator)
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{
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GList *list = event_source->translators;
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GdkWindow *window;
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*event_translator = NULL;
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while (list)
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{
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GdkEventTranslator *translator = list->data;
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list = list->next;
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window = _gdk_x11_event_translator_get_window (translator,
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event_source->display,
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xevent);
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if (window)
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{
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*event_translator = translator;
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return window;
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}
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}
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window = gdk_x11_window_lookup_for_display (event_source->display,
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xevent->xany.window);
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if (window && !GDK_IS_WINDOW (window))
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window = NULL;
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return window;
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}
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static void
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handle_focus_change (GdkEventCrossing *event)
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{
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GdkToplevelX11 *toplevel;
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GdkX11Screen *x11_screen;
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gboolean focus_in, had_focus;
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toplevel = _gdk_x11_window_get_toplevel (event->window);
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x11_screen = GDK_X11_SCREEN (GDK_WINDOW_SCREEN (event->window));
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focus_in = (event->type == GDK_ENTER_NOTIFY);
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if (x11_screen->wmspec_check_window)
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return;
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if (!toplevel || event->detail == GDK_NOTIFY_INFERIOR)
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return;
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toplevel->has_pointer = focus_in;
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if (!event->focus || toplevel->has_focus_window)
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return;
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had_focus = HAS_FOCUS (toplevel);
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toplevel->has_pointer_focus = focus_in;
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if (HAS_FOCUS (toplevel) != had_focus)
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{
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GdkEvent *focus_event;
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focus_event = gdk_event_new (GDK_FOCUS_CHANGE);
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focus_event->focus_change.window = g_object_ref (event->window);
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focus_event->focus_change.send_event = FALSE;
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focus_event->focus_change.in = focus_in;
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gdk_event_set_device (focus_event, gdk_event_get_device ((GdkEvent *) event));
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gdk_display_put_event (gdk_window_get_display (event->window), focus_event);
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gdk_event_free (focus_event);
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}
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}
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static GdkEvent *
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create_synth_crossing_event (GdkEventType evtype,
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GdkCrossingMode mode,
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const GdkEvent *real_event)
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{
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GdkEvent *event;
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gdouble x, y;
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GdkModifierType state;
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g_assert (evtype == GDK_ENTER_NOTIFY || evtype == GDK_LEAVE_NOTIFY);
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event = gdk_event_new (evtype);
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event->crossing.send_event = TRUE;
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event->crossing.window = g_object_ref (real_event->any.window);
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event->crossing.detail = GDK_NOTIFY_ANCESTOR;
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event->crossing.mode = mode;
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event->crossing.time = gdk_event_get_time (real_event);
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gdk_event_set_device (event, gdk_event_get_device (real_event));
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gdk_event_set_source_device (event, gdk_event_get_device (real_event));
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if (gdk_event_get_state (real_event, &state))
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event->crossing.state = state;
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if (gdk_event_get_coords (real_event, &x, &y))
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gdk_event_set_coords (event, x, y);
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return event;
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}
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static void
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handle_touch_synthetic_crossing (GdkEvent *event)
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{
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GdkEventType evtype = gdk_event_get_event_type (event);
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GdkDevice *device = gdk_event_get_device (event);
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GdkEvent *crossing = NULL;
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GdkSeat *seat = gdk_device_get_seat (device);
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gboolean needs_enter, set_needs_enter = FALSE;
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if (quark_needs_enter == 0)
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quark_needs_enter = g_quark_from_static_string ("gdk-x11-needs-enter-after-touch-end");
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needs_enter =
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GPOINTER_TO_UINT (g_object_get_qdata (G_OBJECT (seat), quark_needs_enter));
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if (evtype == GDK_MOTION_NOTIFY && needs_enter)
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{
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set_needs_enter = FALSE;
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crossing = create_synth_crossing_event (GDK_ENTER_NOTIFY,
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GDK_CROSSING_DEVICE_SWITCH,
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event);
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}
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else if (evtype == GDK_TOUCH_BEGIN && needs_enter &&
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gdk_event_get_pointer_emulated (event))
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{
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set_needs_enter = FALSE;
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crossing = create_synth_crossing_event (GDK_ENTER_NOTIFY,
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GDK_CROSSING_TOUCH_BEGIN,
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event);
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}
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else if (evtype == GDK_TOUCH_END &&
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gdk_event_get_pointer_emulated (event))
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{
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set_needs_enter = TRUE;
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crossing = create_synth_crossing_event (GDK_LEAVE_NOTIFY,
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GDK_CROSSING_TOUCH_END,
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event);
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}
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else if (evtype == GDK_ENTER_NOTIFY ||
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evtype == GDK_LEAVE_NOTIFY)
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{
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/* We are receiving or shall receive a real crossing event,
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* turn this off.
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*/
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set_needs_enter = FALSE;
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}
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else
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return;
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if (needs_enter != set_needs_enter)
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{
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if (!set_needs_enter)
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g_object_steal_qdata (G_OBJECT (seat), quark_needs_enter);
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else
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g_object_set_qdata (G_OBJECT (seat), quark_needs_enter,
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GUINT_TO_POINTER (TRUE));
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}
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if (crossing)
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{
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gdk_display_put_event (gdk_device_get_display (device), crossing);
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gdk_event_free (crossing);
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}
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}
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static GdkEvent *
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gdk_event_source_translate_event (GdkX11Display *x11_display,
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const XEvent *xevent)
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{
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GdkEventSource *event_source = (GdkEventSource *) x11_display->event_source;
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GdkEvent *event = gdk_event_new (GDK_NOTHING);
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GdkFilterReturn result = GDK_FILTER_CONTINUE;
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GdkDisplay *display = GDK_DISPLAY (x11_display);
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GdkEventTranslator *event_translator;
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GdkWindow *filter_window;
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Display *dpy;
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GdkX11Screen *x11_screen;
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gpointer cache;
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x11_screen = GDK_X11_DISPLAY (display)->screen;
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dpy = GDK_DISPLAY_XDISPLAY (display);
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filter_window = gdk_event_source_get_filter_window (event_source, xevent,
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&event_translator);
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if (filter_window)
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event->any.window = g_object_ref (filter_window);
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/* apply XSettings filters */
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if (xevent->xany.window == XRootWindow (dpy, 0))
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result = gdk_xsettings_root_window_filter (xevent, event, x11_screen);
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if (result == GDK_FILTER_CONTINUE &&
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xevent->xany.window == x11_screen->xsettings_manager_window)
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result = gdk_xsettings_manager_window_filter (xevent, event, x11_screen);
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cache = gdk_window_cache_get (display);
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if (cache)
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{
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if (result == GDK_FILTER_CONTINUE)
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result = gdk_window_cache_shape_filter (xevent, event, cache);
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if (result == GDK_FILTER_CONTINUE &&
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xevent->xany.window == XRootWindow (dpy, 0))
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result = gdk_window_cache_filter (xevent, event, cache);
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}
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/* Run default filters */
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if (result == GDK_FILTER_CONTINUE &&
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_gdk_default_filters)
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{
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/* Apply global filters */
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result = gdk_event_apply_filters (xevent, event, NULL);
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}
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if (result == GDK_FILTER_CONTINUE &&
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filter_window && filter_window->filters)
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{
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/* Apply per-window filters */
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result = gdk_event_apply_filters (xevent, event, filter_window);
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}
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if (result != GDK_FILTER_CONTINUE)
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{
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if (result == GDK_FILTER_REMOVE)
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{
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gdk_event_free (event);
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return NULL;
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}
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else /* GDK_FILTER_TRANSLATE */
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return event;
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}
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gdk_event_free (event);
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event = NULL;
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if (event_translator)
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{
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/* Event translator was gotten before in get_filter_window() */
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event = _gdk_x11_event_translator_translate (event_translator,
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display,
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xevent);
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}
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else
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{
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GList *list = event_source->translators;
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while (list && !event)
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{
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GdkEventTranslator *translator = list->data;
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list = list->next;
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event = _gdk_x11_event_translator_translate (translator,
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display,
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xevent);
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}
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}
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if (event &&
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(event->type == GDK_ENTER_NOTIFY ||
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event->type == GDK_LEAVE_NOTIFY) &&
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event->crossing.window != NULL)
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{
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/* Handle focusing (in the case where no window manager is running */
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handle_focus_change (&event->crossing);
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}
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if (event &&
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(event->type == GDK_TOUCH_BEGIN ||
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event->type == GDK_TOUCH_END ||
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event->type == GDK_MOTION_NOTIFY ||
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event->type == GDK_ENTER_NOTIFY ||
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event->type == GDK_LEAVE_NOTIFY))
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{
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handle_touch_synthetic_crossing (event);
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}
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return event;
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}
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gboolean
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gdk_event_source_xevent (GdkX11Display *x11_display,
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const XEvent *xevent)
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{
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GdkDisplay *display = GDK_DISPLAY (x11_display);
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GdkEvent *event;
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GList *node;
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event = gdk_event_source_translate_event (x11_display, xevent);
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if (event == NULL)
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return FALSE;
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node = _gdk_event_queue_append (display, event);
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_gdk_windowing_got_event (display, node, event, xevent->xany.serial);
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return TRUE;
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}
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static gboolean
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gdk_check_xpending (GdkDisplay *display)
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{
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return XPending (GDK_DISPLAY_XDISPLAY (display));
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}
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static gboolean
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gdk_event_source_prepare (GSource *source,
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gint *timeout)
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{
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GdkDisplay *display = ((GdkEventSource*) source)->display;
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gboolean retval;
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gdk_threads_enter ();
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*timeout = -1;
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if (display->event_pause_count > 0)
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retval = _gdk_event_queue_find_first (display) != NULL;
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else
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retval = (_gdk_event_queue_find_first (display) != NULL ||
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gdk_check_xpending (display));
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gdk_threads_leave ();
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return retval;
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}
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static gboolean
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gdk_event_source_check (GSource *source)
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{
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GdkEventSource *event_source = (GdkEventSource*) source;
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gboolean retval;
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gdk_threads_enter ();
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if (event_source->display->event_pause_count > 0)
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retval = _gdk_event_queue_find_first (event_source->display) != NULL;
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else if (event_source->event_poll_fd.revents & G_IO_IN)
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retval = (_gdk_event_queue_find_first (event_source->display) != NULL ||
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gdk_check_xpending (event_source->display));
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else
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retval = FALSE;
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gdk_threads_leave ();
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return retval;
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}
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void
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_gdk_x11_display_queue_events (GdkDisplay *display)
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{
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Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
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XEvent xevent;
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gboolean unused;
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while (!_gdk_event_queue_find_first (display) && XPending (xdisplay))
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{
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XNextEvent (xdisplay, &xevent);
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switch (xevent.type)
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{
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case KeyPress:
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case KeyRelease:
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break;
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default:
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if (XFilterEvent (&xevent, None))
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continue;
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}
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#ifdef HAVE_XGENERICEVENTS
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/* Get cookie data here so it's available
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* to every event translator and event filter.
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*/
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if (xevent.type == GenericEvent)
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XGetEventData (xdisplay, &xevent.xcookie);
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#endif
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g_signal_emit_by_name (display, "xevent", &xevent, &unused);
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#ifdef HAVE_XGENERICEVENTS
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if (xevent.type == GenericEvent)
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XFreeEventData (xdisplay, &xevent.xcookie);
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#endif
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}
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}
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static gboolean
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gdk_event_source_dispatch (GSource *source,
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GSourceFunc callback,
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gpointer user_data)
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{
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GdkDisplay *display = ((GdkEventSource*) source)->display;
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GdkEvent *event;
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gdk_threads_enter ();
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event = gdk_display_get_event (display);
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if (event)
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{
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_gdk_event_emit (event);
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gdk_event_free (event);
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}
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gdk_threads_leave ();
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return TRUE;
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}
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static void
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gdk_event_source_finalize (GSource *source)
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{
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GdkEventSource *event_source = (GdkEventSource *)source;
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g_list_free (event_source->translators);
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event_source->translators = NULL;
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}
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GSource *
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gdk_x11_event_source_new (GdkDisplay *display)
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{
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GSource *source;
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GdkEventSource *event_source;
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GdkX11Display *display_x11;
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int connection_number;
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char *name;
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source = g_source_new (&event_funcs, sizeof (GdkEventSource));
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name = g_strdup_printf ("GDK X11 Event source (%s)",
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gdk_display_get_name (display));
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g_source_set_name (source, name);
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g_free (name);
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event_source = (GdkEventSource *) source;
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event_source->display = display;
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display_x11 = GDK_X11_DISPLAY (display);
|
|
connection_number = ConnectionNumber (display_x11->xdisplay);
|
|
|
|
event_source->event_poll_fd.fd = connection_number;
|
|
event_source->event_poll_fd.events = G_IO_IN;
|
|
g_source_add_poll (source, &event_source->event_poll_fd);
|
|
|
|
g_source_set_priority (source, GDK_PRIORITY_EVENTS);
|
|
g_source_set_can_recurse (source, TRUE);
|
|
g_source_attach (source, NULL);
|
|
|
|
return source;
|
|
}
|
|
|
|
void
|
|
gdk_x11_event_source_add_translator (GdkEventSource *source,
|
|
GdkEventTranslator *translator)
|
|
{
|
|
g_return_if_fail (GDK_IS_EVENT_TRANSLATOR (translator));
|
|
|
|
source->translators = g_list_append (source->translators, translator);
|
|
}
|
|
|
|
void
|
|
gdk_x11_event_source_select_events (GdkEventSource *source,
|
|
Window window,
|
|
GdkEventMask event_mask,
|
|
unsigned int extra_x_mask)
|
|
{
|
|
unsigned int xmask = extra_x_mask;
|
|
GList *list;
|
|
gint i;
|
|
|
|
list = source->translators;
|
|
|
|
while (list)
|
|
{
|
|
GdkEventTranslator *translator = list->data;
|
|
GdkEventMask translator_mask, mask;
|
|
|
|
translator_mask = _gdk_x11_event_translator_get_handled_events (translator);
|
|
mask = event_mask & translator_mask;
|
|
|
|
if (mask != 0)
|
|
{
|
|
_gdk_x11_event_translator_select_window_events (translator, window, mask);
|
|
event_mask &= ~mask;
|
|
}
|
|
|
|
list = list->next;
|
|
}
|
|
|
|
for (i = 0; i < _gdk_x11_event_mask_table_size; i++)
|
|
{
|
|
if (event_mask & (1 << (i + 1)))
|
|
xmask |= _gdk_x11_event_mask_table[i];
|
|
}
|
|
|
|
XSelectInput (GDK_DISPLAY_XDISPLAY (source->display), window, xmask);
|
|
}
|