d446dda920
Unqueuing events from the windowing system when paused could result in weird reordering if event filters resulted in application-visible behavior. Since we now resume events when the frame clock is frozen, we now no longer count on low-level event handling running while event handling is paused. https://bugzilla.gnome.org/show_bug.cgi?id=685460
464 lines
12 KiB
C
464 lines
12 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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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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#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 GList *event_sources = NULL;
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static gint
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gdk_event_apply_filters (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 (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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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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gboolean focus_in, had_focus;
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toplevel = _gdk_x11_window_get_toplevel (event->window);
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focus_in = (event->type == GDK_ENTER_NOTIFY);
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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_event_put (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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gdk_event_source_translate_event (GdkEventSource *event_source,
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XEvent *xevent)
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{
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GdkEvent *event = gdk_event_new (GDK_NOTHING);
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GdkFilterReturn result = GDK_FILTER_CONTINUE;
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GdkEventTranslator *event_translator;
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GdkWindow *filter_window;
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Display *dpy;
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dpy = GDK_DISPLAY_XDISPLAY (event_source->display);
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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 (dpy, &xevent->xcookie);
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#endif
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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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/* Run default filters */
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if (_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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#ifdef HAVE_XGENERICEVENTS
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if (xevent->type == GenericEvent)
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XFreeEventData (dpy, &xevent->xcookie);
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#endif
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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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event_source->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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event_source->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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#ifdef HAVE_XGENERICEVENTS
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if (xevent->type == GenericEvent)
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XFreeEventData (dpy, &xevent->xcookie);
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#endif
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return event;
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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 = FALSE;
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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 = FALSE;
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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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GdkEvent *event;
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XEvent xevent;
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Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
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GdkEventSource *event_source;
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GdkX11Display *display_x11;
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display_x11 = GDK_X11_DISPLAY (display);
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event_source = (GdkEventSource *) display_x11->event_source;
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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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event = gdk_event_source_translate_event (event_source, &xevent);
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if (event)
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{
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GList *node;
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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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}
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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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event_sources = g_list_remove (event_sources, source);
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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);
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connection_number = ConnectionNumber (display_x11->xdisplay);
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event_source->event_poll_fd.fd = connection_number;
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event_source->event_poll_fd.events = G_IO_IN;
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g_source_add_poll (source, &event_source->event_poll_fd);
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g_source_set_priority (source, GDK_PRIORITY_EVENTS);
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g_source_set_can_recurse (source, TRUE);
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g_source_attach (source, NULL);
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event_sources = g_list_prepend (event_sources, source);
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return source;
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}
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void
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gdk_x11_event_source_add_translator (GdkEventSource *source,
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GdkEventTranslator *translator)
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{
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g_return_if_fail (GDK_IS_EVENT_TRANSLATOR (translator));
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source->translators = g_list_append (source->translators, translator);
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}
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void
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gdk_x11_event_source_select_events (GdkEventSource *source,
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Window window,
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GdkEventMask event_mask,
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unsigned int extra_x_mask)
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{
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unsigned int xmask = extra_x_mask;
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GList *list;
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gint i;
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list = source->translators;
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while (list)
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{
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GdkEventTranslator *translator = list->data;
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GdkEventMask translator_mask, mask;
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translator_mask = _gdk_x11_event_translator_get_handled_events (translator);
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mask = event_mask & translator_mask;
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if (mask != 0)
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{
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_gdk_x11_event_translator_select_window_events (translator, window, mask);
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event_mask &= ~mask;
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}
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list = list->next;
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}
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for (i = 0; i < _gdk_x11_event_mask_table_size; i++)
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{
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if (event_mask & (1 << (i + 1)))
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xmask |= _gdk_x11_event_mask_table[i];
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}
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XSelectInput (GDK_DISPLAY_XDISPLAY (source->display), window, xmask);
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}
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