+\f
+#ifdef HAVE_XINPUT
+/* XInputExtension device support */
+#include <X11/extensions/XInput.h>
+
+struct xinput_dev_info {
+ XDevice *device;
+ XEventClass press, release, valuator;
+};
+
+Bool
+query_xinput_extension (saver_info *si)
+{
+ XExtCodes codes;
+
+ if (!XQueryExtension (si->dpy, INAME, &codes.major_opcode,
+ &codes.first_event, &codes.first_error))
+ {
+ if (si->prefs.verbose_p)
+ fprintf (stderr, "\t XInputExtension is not present!\n");
+ return False;
+ }
+ else
+ {
+ if (si->prefs.verbose_p)
+ fprintf (stderr, "\t XInputExtension is present!\n");
+ return True;
+ }
+}
+
+void
+init_xinput_extension (saver_info *si)
+{
+ int i, ndevices;
+ int class;
+ XDeviceInfo *list;
+ XDevice *dev;
+ XAnyClassPtr pClass;
+ XEventClass *event_list;
+ int nevents = 0;
+
+ /* skip if already initialized */
+ if (si->num_xinput_devices && si->xinput_devices)
+ return;
+
+ si->num_xinput_devices = 0;
+
+ list = XListInputDevices (si->dpy, &ndevices);
+ if (list == NULL)
+ {
+ si->xinput_devices = NULL;
+ return;
+ }
+
+ /* We only care about 3 event types per device (DeviceButtonPress,
+ DeviceButtonRelease, and DeviceMotionNotify), hence the "* 3"
+ for the event count. */
+ event_list = calloc(ndevices * 3, sizeof(XEventClass));
+ if (event_list == NULL)
+ return;
+
+ si->xinput_devices = calloc(ndevices, sizeof(struct xinput_dev_info));
+ if (si->xinput_devices == NULL)
+ {
+ free(event_list);
+ return;
+ }
+
+ for (i = 0; i < ndevices; i++)
+ {
+ if ((list[i].use == IsXExtensionDevice)
+#ifdef IsXExtensionPointer
+ || (list[i].use == IsXExtensionPointer)
+#endif
+ )
+ {
+ struct xinput_dev_info *dev_info =
+ &si->xinput_devices[si->num_xinput_devices];
+ Bool device_we_want = False;
+
+ if (si->prefs.debug_p)
+ fprintf(stderr,
+ "Extension device #%2d: XID=%2d type=%3d name=\"%s\"\n",
+ i, (int) list[i].id, (int) list[i].type, list[i].name);
+
+ dev = XOpenDevice (si->dpy, list[i].id);
+ if (!dev)
+ continue;
+ dev_info->device = dev;
+
+ pClass = list[i].inputclassinfo;
+ for (class = 0; class < list[i].num_classes; class++)
+ {
+ switch (pClass->class)
+ {
+ case ButtonClass:
+ if (((XButtonInfo *) pClass)->num_buttons > 0)
+ {
+ /* Macros set values in the second & third arguments */
+ DeviceButtonPress (dev, si->xinput_DeviceButtonPress,
+ dev_info->press);
+ event_list[nevents++] = dev_info->press;
+
+ DeviceButtonRelease (dev, si->xinput_DeviceButtonRelease,
+ dev_info->release);
+ event_list[nevents++] = dev_info->release;
+ device_we_want = True;
+ }
+ break;
+
+ case ValuatorClass:
+ if (((XValuatorInfo *) pClass)->num_axes > 0)
+ {
+ DeviceMotionNotify (dev, si->xinput_DeviceMotionNotify,
+ dev_info->valuator);
+ event_list[nevents++] = dev_info->valuator;
+ device_we_want = True;
+ }
+ break;
+
+ default:
+ /* ignore other classes of devices/events */
+ break;
+ }
+
+ pClass = (XAnyClassPtr) & ((char *) pClass)[pClass->length];
+ }
+
+ if (device_we_want)
+ si->num_xinput_devices++;
+ else
+ XCloseDevice (si->dpy, dev);
+ }
+ }
+
+ if (list)
+ XFreeDeviceList (list);
+
+ if ((nevents == 0) || (si->num_xinput_devices == 0))
+ {
+ free(event_list);
+ free(si->xinput_devices);
+ si->xinput_devices = NULL;
+ si->num_xinput_devices = 0;
+ return;
+ }
+
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ Window root = RootWindowOfScreen (ssi->screen);
+ XSelectExtensionEvent (si->dpy, root, event_list, nevents);
+ }
+
+ free(event_list);
+}
+
+#if 0
+/* not used */
+static void
+close_xinput_extension (saver_info *si)
+{
+ int i;
+
+ for (i = 0; i < si->num_xinput_devices; i++)
+ XCloseDevice (si->dpy, si->xinput_devices[i].device);
+
+ free(si->xinput_devices);
+ si->xinput_devices = NULL;
+ si->num_xinput_devices = 0;
+}
+#endif
+#endif /* HAVE_XINPUT */
+
projects / xscreensaver / blobdiff