mutter/clutter/x11/clutter-input-device-xi2.c
Emmanuele Bassi 1b1e77b469 event/x11: Rework the way we translate X11 events
This is a lump commit that is fairly difficult to break down without
either breaking bisecting or breaking the test cases.

The new design for handling X11 event translation works this way:

  - ClutterBackend::translate_event() has been added as the central
    point used by a ClutterBackend implementation to translate a
    native event into a ClutterEvent;

  - ClutterEventTranslator is a private interface that should be
    implemented by backend-specific objects, like stage
    implementations and ClutterDeviceManager sub-classes, and
    allows dealing with class-specific event translation;

  - ClutterStageX11 implements EventTranslator, and deals with the
    stage-relative X11 events coming from the X11 event source;

  - ClutterStageGLX overrides EventTranslator, in order to
    deal with the INTEL_GLX_swap_event extension, and it chains up
    to the X11 default implementation;

  - ClutterDeviceManagerX11 has been split into two separate classes,
    one that deals with core and (optionally) XI1 events, and the
    other that deals with XI2 events; the selection is done at run-time,
    since the core+XI1 and XI2 mechanisms are mutually exclusive.

All the other backends we officially support still use their own
custom event source and translation function, but the end goal is to
migrate them to the translate_event() virtual function, and have the
event source be a shared part of Clutter core.
2011-01-21 10:25:43 +00:00

162 lines
4.0 KiB
C

#include "config.h"
#include "clutter-input-device-xi2.h"
#include "clutter-debug.h"
#include "clutter-device-manager-private.h"
#include "clutter-private.h"
#include "clutter-stage-private.h"
#include "clutter-backend-x11.h"
#include "clutter-stage-x11.h"
#include <X11/extensions/XInput2.h>
typedef struct _ClutterInputDeviceClass ClutterInputDeviceXI2Class;
/* a specific XI2 input device */
struct _ClutterInputDeviceXI2
{
ClutterInputDevice device;
gint device_id;
};
#define N_BUTTONS 5
#define clutter_input_device_xi2_get_type _clutter_input_device_xi2_get_type
G_DEFINE_TYPE (ClutterInputDeviceXI2,
clutter_input_device_xi2,
CLUTTER_TYPE_INPUT_DEVICE);
static void
clutter_input_device_xi2_select_stage_events (ClutterInputDevice *device,
ClutterStage *stage,
gint event_mask)
{
ClutterInputDeviceXI2 *device_xi2 = CLUTTER_INPUT_DEVICE_XI2 (device);
ClutterBackendX11 *backend_x11;
ClutterStageX11 *stage_x11;
XIEventMask xi_event_mask;
unsigned char *mask;
int len;
backend_x11 = CLUTTER_BACKEND_X11 (device->backend);
stage_x11 = CLUTTER_STAGE_X11 (_clutter_stage_get_window (stage));
len = XIMaskLen (XI_LASTEVENT);
mask = g_new0 (unsigned char, len);
if (event_mask & PointerMotionMask)
XISetMask (mask, XI_Motion);
if (event_mask & ButtonPressMask)
XISetMask (mask, XI_ButtonPress);
if (event_mask & ButtonReleaseMask)
XISetMask (mask, XI_ButtonRelease);
if (event_mask & KeyPressMask)
XISetMask (mask, XI_KeyPress);
if (event_mask & KeyReleaseMask)
XISetMask (mask, XI_KeyRelease);
if (event_mask & EnterWindowMask)
XISetMask (mask, XI_Enter);
if (event_mask & LeaveWindowMask)
XISetMask (mask, XI_Leave);
xi_event_mask.deviceid = device_xi2->device_id;
xi_event_mask.mask = mask;
xi_event_mask.mask_len = len;
CLUTTER_NOTE (BACKEND, "Selecting device id '%d' events",
device_xi2->device_id);
XISelectEvents (backend_x11->xdpy, stage_x11->xwin, &xi_event_mask, 1);
g_free (mask);
}
static void
clutter_input_device_xi2_constructed (GObject *gobject)
{
ClutterInputDeviceXI2 *device_xi2 = CLUTTER_INPUT_DEVICE_XI2 (gobject);
g_object_get (gobject, "id", &device_xi2->device_id, NULL);
if (G_OBJECT_CLASS (clutter_input_device_xi2_parent_class)->constructed)
G_OBJECT_CLASS (clutter_input_device_xi2_parent_class)->constructed (gobject);
}
static void
clutter_input_device_xi2_class_init (ClutterInputDeviceXI2Class *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->constructed = clutter_input_device_xi2_constructed;
g_signal_override_class_handler ("select-stage-events",
CLUTTER_TYPE_INPUT_DEVICE_XI2,
G_CALLBACK (clutter_input_device_xi2_select_stage_events));
}
static void
clutter_input_device_xi2_init (ClutterInputDeviceXI2 *self)
{
}
guint
_clutter_input_device_xi2_translate_state (XIModifierState *modifiers_state,
XIButtonState *buttons_state)
{
guint retval = 0;
if (modifiers_state)
retval = (guint) modifiers_state->effective;
if (buttons_state)
{
int len, i;
len = MIN (N_BUTTONS, buttons_state->mask_len * 8);
for (i = 0; i < len; i++)
{
if (!XIMaskIsSet (buttons_state->mask, i))
continue;
switch (i)
{
case 1:
retval |= CLUTTER_BUTTON1_MASK;
break;
case 2:
retval |= CLUTTER_BUTTON2_MASK;
break;
case 3:
retval |= CLUTTER_BUTTON3_MASK;
break;
case 4:
retval |= CLUTTER_BUTTON4_MASK;
break;
case 5:
retval |= CLUTTER_BUTTON5_MASK;
break;
default:
break;
}
}
}
return retval;
}