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gtk2/gdk/x11/gdkdevice-xi2.c
Matthias Clasen 9b967ab8af XI2: Push error traps around XIQueryDevice calls 
This may help against the crashes at resume time that some
people have been hitting when input devices mysteriously
disappear.
2011-11-30 00:16:43 -05:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 2009 Carlos Garnacho <carlosg@gnome.org>
*
* 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 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "gdkx11device-xi2.h"
#include "gdkdeviceprivate.h"
#include "gdkintl.h"
#include "gdkasync.h"
#include "gdkprivate-x11.h"
#ifdef XINPUT_2
#include <stdlib.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/extensions/XInput2.h>
#endif
struct _GdkX11DeviceXI2
{
GdkDevice parent_instance;
gint device_id;
};
struct _GdkX11DeviceXI2Class
{
GdkDeviceClass parent_class;
};
G_DEFINE_TYPE (GdkX11DeviceXI2, gdk_x11_device_xi2, GDK_TYPE_DEVICE)
#ifdef XINPUT_2
static void gdk_x11_device_xi2_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gdk_x11_device_xi2_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gdk_x11_device_xi2_get_state (GdkDevice *device,
GdkWindow *window,
gdouble *axes,
GdkModifierType *mask);
static void gdk_x11_device_xi2_set_window_cursor (GdkDevice *device,
GdkWindow *window,
GdkCursor *cursor);
static void gdk_x11_device_xi2_warp (GdkDevice *device,
GdkScreen *screen,
gint x,
gint y);
static gboolean gdk_x11_device_xi2_query_state (GdkDevice *device,
GdkWindow *window,
GdkWindow **root_window,
GdkWindow **child_window,
gint *root_x,
gint *root_y,
gint *win_x,
gint *win_y,
GdkModifierType *mask);
static GdkGrabStatus gdk_x11_device_xi2_grab (GdkDevice *device,
GdkWindow *window,
gboolean owner_events,
GdkEventMask event_mask,
GdkWindow *confine_to,
GdkCursor *cursor,
guint32 time_);
static void gdk_x11_device_xi2_ungrab (GdkDevice *device,
guint32 time_);
static GdkWindow * gdk_x11_device_xi2_window_at_position (GdkDevice *device,
gint *win_x,
gint *win_y,
GdkModifierType *mask,
gboolean get_toplevel);
static void gdk_x11_device_xi2_select_window_events (GdkDevice *device,
GdkWindow *window,
GdkEventMask event_mask);
enum {
PROP_0,
PROP_DEVICE_ID
};
static void
gdk_x11_device_xi2_class_init (GdkX11DeviceXI2Class *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkDeviceClass *device_class = GDK_DEVICE_CLASS (klass);
object_class->get_property = gdk_x11_device_xi2_get_property;
object_class->set_property = gdk_x11_device_xi2_set_property;
device_class->get_state = gdk_x11_device_xi2_get_state;
device_class->set_window_cursor = gdk_x11_device_xi2_set_window_cursor;
device_class->warp = gdk_x11_device_xi2_warp;
device_class->query_state = gdk_x11_device_xi2_query_state;
device_class->grab = gdk_x11_device_xi2_grab;
device_class->ungrab = gdk_x11_device_xi2_ungrab;
device_class->window_at_position = gdk_x11_device_xi2_window_at_position;
device_class->select_window_events = gdk_x11_device_xi2_select_window_events;
g_object_class_install_property (object_class,
PROP_DEVICE_ID,
g_param_spec_int ("device-id",
P_("Device ID"),
P_("Device identifier"),
0, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
}
static void
gdk_x11_device_xi2_init (GdkX11DeviceXI2 *device)
{
}
static void
gdk_x11_device_xi2_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (object);
switch (prop_id)
{
case PROP_DEVICE_ID:
g_value_set_int (value, device_xi2->device_id);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_x11_device_xi2_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (object);
switch (prop_id)
{
case PROP_DEVICE_ID:
device_xi2->device_id = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_x11_device_xi2_get_state (GdkDevice *device,
GdkWindow *window,
gdouble *axes,
GdkModifierType *mask)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
if (axes)
{
GdkDisplay *display;
XIDeviceInfo *info;
gint i, j, ndevices;
display = gdk_device_get_display (device);
gdk_x11_display_error_trap_push (display);
info = XIQueryDevice (GDK_DISPLAY_XDISPLAY (display),
device_xi2->device_id, &ndevices);
gdk_x11_display_error_trap_pop_ignored (display);
for (i = 0, j = 0; info && i < info->num_classes; i++)
{
XIAnyClassInfo *class_info = info->classes[i];
GdkAxisUse use;
gdouble value;
if (class_info->type != XIValuatorClass)
continue;
value = ((XIValuatorClassInfo *) class_info)->value;
use = gdk_device_get_axis_use (device, j);
switch (use)
{
case GDK_AXIS_X:
case GDK_AXIS_Y:
case GDK_AXIS_IGNORE:
if (gdk_device_get_mode (device) == GDK_MODE_WINDOW)
_gdk_device_translate_window_coord (device, window, j, value, &axes[j]);
else
{
gint root_x, root_y;
/* FIXME: Maybe root coords chaching should happen here */
gdk_window_get_origin (window, &root_x, &root_y);
_gdk_device_translate_screen_coord (device, window,
root_x, root_y,
j, value,
&axes[j]);
}
break;
default:
_gdk_device_translate_axis (device, j, value, &axes[j]);
break;
}
j++;
}
if (info)
XIFreeDeviceInfo (info);
}
if (mask)
gdk_x11_device_xi2_query_state (device, window,
NULL, NULL,
NULL, NULL,
NULL, NULL,
mask);
}
static void
gdk_x11_device_xi2_set_window_cursor (GdkDevice *device,
GdkWindow *window,
GdkCursor *cursor)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
/* Non-master devices don't have a cursor */
if (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_MASTER)
return;
if (cursor)
XIDefineCursor (GDK_WINDOW_XDISPLAY (window),
device_xi2->device_id,
GDK_WINDOW_XID (window),
gdk_x11_cursor_get_xcursor (cursor));
else
XIUndefineCursor (GDK_WINDOW_XDISPLAY (window),
device_xi2->device_id,
GDK_WINDOW_XID (window));
}
static void
gdk_x11_device_xi2_warp (GdkDevice *device,
GdkScreen *screen,
gint x,
gint y)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
Window dest;
dest = GDK_WINDOW_XID (gdk_screen_get_root_window (screen));
XIWarpPointer (GDK_SCREEN_XDISPLAY (screen),
device_xi2->device_id,
None, dest,
0, 0, 0, 0, x, y);
}
static gboolean
gdk_x11_device_xi2_query_state (GdkDevice *device,
GdkWindow *window,
GdkWindow **root_window,
GdkWindow **child_window,
gint *root_x,
gint *root_y,
gint *win_x,
gint *win_y,
GdkModifierType *mask)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
GdkDisplay *display;
GdkScreen *default_screen;
Window xroot_window, xchild_window;
gdouble xroot_x, xroot_y, xwin_x, xwin_y;
XIButtonState button_state;
XIModifierState mod_state;
XIGroupState group_state;
if (!window || GDK_WINDOW_DESTROYED (window))
return FALSE;
display = gdk_window_get_display (window);
default_screen = gdk_display_get_default_screen (display);
if (G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
{
if (!XIQueryPointer (GDK_WINDOW_XDISPLAY (window),
device_xi2->device_id,
GDK_WINDOW_XID (window),
&xroot_window,
&xchild_window,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state))
return FALSE;
}
else
{
XSetWindowAttributes attributes;
Display *xdisplay;
Window xwindow, w;
/* FIXME: untrusted clients not multidevice-safe */
xdisplay = GDK_SCREEN_XDISPLAY (default_screen);
xwindow = GDK_SCREEN_XROOTWIN (default_screen);
w = XCreateWindow (xdisplay, xwindow, 0, 0, 1, 1, 0,
CopyFromParent, InputOnly, CopyFromParent,
0, &attributes);
XIQueryPointer (xdisplay, device_xi2->device_id,
w,
&xroot_window,
&xchild_window,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state);
XDestroyWindow (xdisplay, w);
}
if (root_window)
*root_window = gdk_x11_window_lookup_for_display (display, xroot_window);
if (child_window)
*child_window = gdk_x11_window_lookup_for_display (display, xchild_window);
if (root_x)
*root_x = (gint) xroot_x;
if (root_y)
*root_y = (gint) xroot_y;
if (win_x)
*win_x = (gint) xwin_x;
if (win_y)
*win_y = (gint) xwin_y;
if (mask)
*mask = _gdk_x11_device_xi2_translate_state (&mod_state, &button_state, &group_state);
free (button_state.mask);
return TRUE;
}
static GdkGrabStatus
gdk_x11_device_xi2_grab (GdkDevice *device,
GdkWindow *window,
gboolean owner_events,
GdkEventMask event_mask,
GdkWindow *confine_to,
GdkCursor *cursor,
guint32 time_)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
GdkDisplay *display;
XIEventMask mask;
Window xwindow;
Cursor xcursor;
gint status;
display = gdk_device_get_display (device);
/* FIXME: confine_to is actually unused */
xwindow = GDK_WINDOW_XID (window);
if (!cursor)
xcursor = None;
else
{
_gdk_x11_cursor_update_theme (cursor);
xcursor = gdk_x11_cursor_get_xcursor (cursor);
}
mask.deviceid = device_xi2->device_id;
mask.mask = _gdk_x11_device_xi2_translate_event_mask (event_mask, &mask.mask_len);
#ifdef G_ENABLE_DEBUG
if (_gdk_debug_flags & GDK_DEBUG_NOGRABS)
status = GrabSuccess;
else
#endif
status = XIGrabDevice (GDK_DISPLAY_XDISPLAY (display),
device_xi2->device_id,
xwindow,
time_,
xcursor,
GrabModeAsync, GrabModeAsync,
owner_events,
&mask);
g_free (mask.mask);
_gdk_x11_display_update_grab_info (display, device, status);
return _gdk_x11_convert_grab_status (status);
}
static void
gdk_x11_device_xi2_ungrab (GdkDevice *device,
guint32 time_)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
GdkDisplay *display;
gulong serial;
display = gdk_device_get_display (device);
serial = NextRequest (GDK_DISPLAY_XDISPLAY (display));
XIUngrabDevice (GDK_DISPLAY_XDISPLAY (display), device_xi2->device_id, time_);
_gdk_x11_display_update_grab_info_ungrab (display, device, time_, serial);
}
static GdkWindow *
gdk_x11_device_xi2_window_at_position (GdkDevice *device,
gint *win_x,
gint *win_y,
GdkModifierType *mask,
gboolean get_toplevel)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
GdkDisplay *display;
GdkScreen *screen;
Display *xdisplay;
GdkWindow *window;
Window xwindow, root, child, last = None;
gdouble xroot_x, xroot_y, xwin_x, xwin_y;
XIButtonState button_state = { 0 };
XIModifierState mod_state;
XIGroupState group_state;
display = gdk_device_get_display (device);
screen = gdk_display_get_default_screen (display);
/* This function really only works if the mouse pointer is held still
* during its operation. If it moves from one leaf window to another
* than we'll end up with inaccurate values for win_x, win_y
* and the result.
*/
gdk_x11_display_grab (display);
xdisplay = GDK_SCREEN_XDISPLAY (screen);
xwindow = GDK_SCREEN_XROOTWIN (screen);
if (G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
{
XIQueryPointer (xdisplay,
device_xi2->device_id,
xwindow,
&root, &child,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state);
if (root == xwindow)
xwindow = child;
else
xwindow = root;
}
else
{
gint i, screens, width, height;
GList *toplevels, *list;
Window pointer_window, root, child;
/* FIXME: untrusted clients case not multidevice-safe */
pointer_window = None;
screens = gdk_display_get_n_screens (display);
for (i = 0; i < screens; ++i)
{
screen = gdk_display_get_screen (display, i);
toplevels = gdk_screen_get_toplevel_windows (screen);
for (list = toplevels; list != NULL; list = g_list_next (list))
{
window = GDK_WINDOW (list->data);
xwindow = GDK_WINDOW_XID (window);
/* Free previous button mask, if any */
g_free (button_state.mask);
gdk_x11_display_error_trap_push (display);
XIQueryPointer (xdisplay,
device_xi2->device_id,
xwindow,
&root, &child,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state);
if (gdk_x11_display_error_trap_pop (display))
continue;
if (child != None)
{
pointer_window = child;
break;
}
gdk_window_get_geometry (window, NULL, NULL, &width, &height);
if (xwin_x >= 0 && xwin_y >= 0 && xwin_x < width && xwin_y < height)
{
/* A childless toplevel, or below another window? */
XSetWindowAttributes attributes;
Window w;
free (button_state.mask);
w = XCreateWindow (xdisplay, xwindow, (int)xwin_x, (int)xwin_y, 1, 1, 0,
CopyFromParent, InputOnly, CopyFromParent,
0, &attributes);
XMapWindow (xdisplay, w);
XIQueryPointer (xdisplay,
device_xi2->device_id,
xwindow,
&root, &child,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state);
XDestroyWindow (xdisplay, w);
if (child == w)
{
pointer_window = xwindow;
break;
}
}
}
g_list_free (toplevels);
if (pointer_window != None)
break;
}
xwindow = pointer_window;
}
while (xwindow)
{
last = xwindow;
free (button_state.mask);
gdk_x11_display_error_trap_push (display);
XIQueryPointer (xdisplay,
device_xi2->device_id,
xwindow,
&root, &xwindow,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state);
if (gdk_x11_display_error_trap_pop (display))
break;
if (get_toplevel && last != root &&
(window = gdk_x11_window_lookup_for_display (display, last)) != NULL &&
GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN)
{
xwindow = last;
break;
}
}
gdk_x11_display_ungrab (display);
window = gdk_x11_window_lookup_for_display (display, last);
if (win_x)
*win_x = (window) ? (gint) xwin_x : -1;
if (win_y)
*win_y = (window) ? (gint) xwin_y : -1;
if (mask)
*mask = _gdk_x11_device_xi2_translate_state (&mod_state, &button_state, &group_state);
free (button_state.mask);
return window;
}
static void
gdk_x11_device_xi2_select_window_events (GdkDevice *device,
GdkWindow *window,
GdkEventMask event_mask)
{
GdkX11DeviceXI2 *device_xi2 = GDK_X11_DEVICE_XI2 (device);
XIEventMask evmask;
evmask.deviceid = device_xi2->device_id;
evmask.mask = _gdk_x11_device_xi2_translate_event_mask (event_mask, &evmask.mask_len);
XISelectEvents (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
&evmask, 1);
g_free (evmask.mask);
}
guchar *
_gdk_x11_device_xi2_translate_event_mask (GdkEventMask event_mask,
gint *len)
{
guchar *mask;
*len = XIMaskLen (XI_LASTEVENT);
mask = g_new0 (guchar, *len);
if (event_mask & GDK_POINTER_MOTION_MASK ||
event_mask & GDK_POINTER_MOTION_HINT_MASK)
XISetMask (mask, XI_Motion);
if (event_mask & GDK_BUTTON_MOTION_MASK ||
event_mask & GDK_BUTTON1_MOTION_MASK ||
event_mask & GDK_BUTTON2_MOTION_MASK ||
event_mask & GDK_BUTTON3_MOTION_MASK)
{
XISetMask (mask, XI_ButtonPress);
XISetMask (mask, XI_ButtonRelease);
XISetMask (mask, XI_Motion);
}
if (event_mask & GDK_SCROLL_MASK)
{
XISetMask (mask, XI_ButtonPress);
XISetMask (mask, XI_ButtonRelease);
}
if (event_mask & GDK_BUTTON_PRESS_MASK)
XISetMask (mask, XI_ButtonPress);
if (event_mask & GDK_BUTTON_RELEASE_MASK)
XISetMask (mask, XI_ButtonRelease);
if (event_mask & GDK_KEY_PRESS_MASK)
XISetMask (mask, XI_KeyPress);
if (event_mask & GDK_KEY_RELEASE_MASK)
XISetMask (mask, XI_KeyRelease);
if (event_mask & GDK_ENTER_NOTIFY_MASK)
XISetMask (mask, XI_Enter);
if (event_mask & GDK_LEAVE_NOTIFY_MASK)
XISetMask (mask, XI_Leave);
if (event_mask & GDK_FOCUS_CHANGE_MASK)
{
XISetMask (mask, XI_FocusIn);
XISetMask (mask, XI_FocusOut);
}
return mask;
}
guint
_gdk_x11_device_xi2_translate_state (XIModifierState *mods_state,
XIButtonState *buttons_state,
XIGroupState *group_state)
{
guint state = 0;
if (mods_state)
state = (guint) mods_state->base | mods_state->latched | mods_state->locked;
if (buttons_state)
{
gint len, i;
/* We're only interested in the first 5 buttons */
len = MIN (5, buttons_state->mask_len * 8);
for (i = 0; i < len; i++)
{
if (!XIMaskIsSet (buttons_state->mask, i))
continue;
switch (i)
{
case 1:
state |= GDK_BUTTON1_MASK;
break;
case 2:
state |= GDK_BUTTON2_MASK;
break;
case 3:
state |= GDK_BUTTON3_MASK;
break;
case 4:
state |= GDK_BUTTON4_MASK;
break;
case 5:
state |= GDK_BUTTON5_MASK;
break;
default:
break;
}
}
}
if (group_state)
{
gint group;
group = group_state->base + group_state->latched + group_state->locked;
/* FIXME: do we need the XKB complications for this ? */
group = CLAMP(group, 0, 3);
state |= group << 13;
}
return state;
}
gint
_gdk_x11_device_xi2_get_id (GdkX11DeviceXI2 *device)
{
g_return_val_if_fail (GDK_IS_X11_DEVICE_XI2 (device), 0);
return device->device_id;
}
#else /* XINPUT_2 */
static void
gdk_x11_device_xi2_class_init (GdkX11DeviceXI2Class *klass)
{
}
static void
gdk_x11_device_xi2_init (GdkX11DeviceXI2 *device)
{
}
#endif /* XINPUT_2 */
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