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/*
* AT-SPI - Assistive Technology Service Provider Interface
* (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
*
* Copyright 2009 Nokia.
*
* 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 2.1 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <glib.h>
#include "event-source.h"
typedef struct _DisplaySource
{
GSource source;
Display *display;
GPollFD event_poll_fd;
} DisplaySource;
/*---------------------------------------------------------------------------*/
static void (*_spi_default_filter) (XEvent*, void*) = NULL;
static void* _spi_default_filter_data = NULL;
/*---------------------------------------------------------------------------*/
static gboolean
event_prepare (GSource *source, gint *timeout)
{
Display *display = ((DisplaySource *)source)->display;
gboolean retval;
*timeout = -1;
retval = XPending (display);
return retval;
}
static gboolean
event_check (GSource *source)
{
DisplaySource *display_source = (DisplaySource*)source;
gboolean retval;
if (display_source->event_poll_fd.revents & G_IO_IN)
retval = XPending (display_source->display);
else
retval = FALSE;
return retval;
}
static gboolean
event_dispatch (GSource *source, GSourceFunc callback, gpointer user_data)
{
Display *display = ((DisplaySource*)source)->display;
XEvent xevent;
/* TODO - Should this be "if (XPending (display))"?
* The effect of this might be to run other main loop functions
* before dispatching the next XEvent.
*/
while (XPending (display))
{
XNextEvent (display, &xevent);
switch (xevent.type)
{
case KeyPress:
case KeyRelease:
break;
default:
if (XFilterEvent (&xevent, None))
continue;
}
if (_spi_default_filter)
{
_spi_default_filter (&xevent, _spi_default_filter_data);
}
}
return TRUE;
}
/*---------------------------------------------------------------------------*/
static GSourceFuncs event_funcs = {
event_prepare,
event_check,
event_dispatch,
NULL
};
static GSource *
display_source_new (Display *display)
{
GSource *source = g_source_new (&event_funcs, sizeof (DisplaySource));
DisplaySource *display_source = (DisplaySource *) source;
g_source_set_name (source, "[at-spi2-core] display_source_funcs");
display_source->display = display;
return source;
}
/*---------------------------------------------------------------------------*/
static DisplaySource *spi_display_source = NULL;
void
spi_events_init (Display *display)
{
GSource *source;
int connection_number = ConnectionNumber (display);
source = display_source_new (display);
spi_display_source = (DisplaySource*) source;
g_source_set_priority (source, G_PRIORITY_DEFAULT);
spi_display_source->event_poll_fd.fd = connection_number;
spi_display_source->event_poll_fd.events = G_IO_IN;
g_source_add_poll (source, &spi_display_source->event_poll_fd);
g_source_set_can_recurse (source, TRUE);
g_source_attach (source, NULL);
}
void
spi_events_uninit ()
{
if (spi_display_source)
{
g_source_destroy ((GSource *) spi_display_source);
g_source_unref ((GSource *) spi_display_source);
spi_display_source = NULL;
}
}
void
spi_set_events (long event_mask)
{
long xevent_mask = StructureNotifyMask | PropertyChangeMask;
xevent_mask |= event_mask;
XSelectInput (spi_display_source->display,
DefaultRootWindow (spi_display_source->display),
xevent_mask);
}
void
spi_set_filter (void (*filter) (XEvent*, void*), void* data)
{
_spi_default_filter = filter;
_spi_default_filter_data = data;
}
/*END------------------------------------------------------------------------*/
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