xenocara/xserver/dix/enterleave.c

1559 lines
50 KiB
C

/*
* Copyright © 2008 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors: Peter Hutterer
*
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <X11/X.h>
#include <X11/extensions/XI2.h>
#include <X11/extensions/XIproto.h>
#include <X11/extensions/XI2proto.h>
#include "inputstr.h"
#include "windowstr.h"
#include "scrnintstr.h"
#include "exglobals.h"
#include "enterleave.h"
#include "eventconvert.h"
#include "xkbsrv.h"
#include "inpututils.h"
/**
* @file
* This file describes the model for sending core enter/leave events and
* focus in/out in the case of multiple pointers/keyboard foci.
*
* Since we can't send more than one Enter or Leave/Focus in or out event per
* window to a core client without confusing it, this is a rather complicated
* approach.
*
* For a full description of the enter/leave model from a window's
* perspective, see
* http://lists.freedesktop.org/archives/xorg/2008-August/037606.html
*
* For a full description of the focus in/out model from a window's
* perspective, see
* http://lists.freedesktop.org/archives/xorg/2008-December/041740.html
*
* Additional notes:
* - The core protocol spec says that "In a LeaveNotify event, if a child of the
* event window contains the initial position of the pointer, then the child
* component is set to that child. Otherwise, it is None. For an EnterNotify
* event, if a child of the event window contains the final pointer position,
* then the child component is set to that child. Otherwise, it is None."
*
* By inference, this means that only NotifyVirtual or NotifyNonlinearVirtual
* events may have a subwindow set to other than None.
*
* - NotifyPointer events may be sent if the focus changes from window A to
* B. The assumption used in this model is that NotifyPointer events are only
* sent for the pointer paired with the keyboard that is involved in the focus
* events. For example, if F(W) changes because of keyboard 2, then
* NotifyPointer events are only sent for pointer 2.
*/
static WindowPtr PointerWindows[MAXDEVICES];
static WindowPtr FocusWindows[MAXDEVICES];
/**
* Return TRUE if 'win' has a pointer within its boundaries, excluding child
* window.
*/
static BOOL
HasPointer(DeviceIntPtr dev, WindowPtr win)
{
int i;
/* FIXME: The enter/leave model does not cater for grabbed devices. For
* now, a quickfix: if the device about to send an enter/leave event to
* a window is grabbed, assume there is no pointer in that window.
* Fixes fdo 27804.
* There isn't enough beer in my fridge to fix this properly.
*/
if (dev->deviceGrab.grab)
return FALSE;
for (i = 0; i < MAXDEVICES; i++)
if (PointerWindows[i] == win)
return TRUE;
return FALSE;
}
/**
* Return TRUE if at least one keyboard focus is set to 'win' (excluding
* descendants of win).
*/
static BOOL
HasFocus(WindowPtr win)
{
int i;
for (i = 0; i < MAXDEVICES; i++)
if (FocusWindows[i] == win)
return TRUE;
return FALSE;
}
/**
* Return the window the device dev is currently on.
*/
static WindowPtr
PointerWin(DeviceIntPtr dev)
{
return PointerWindows[dev->id];
}
/**
* Search for the first window below 'win' that has a pointer directly within
* it's boundaries (excluding boundaries of its own descendants).
*
* @return The child window that has the pointer within its boundaries or
* NULL.
*/
static WindowPtr
FirstPointerChild(WindowPtr win)
{
int i;
for (i = 0; i < MAXDEVICES; i++) {
if (PointerWindows[i] && IsParent(win, PointerWindows[i]))
return PointerWindows[i];
}
return NULL;
}
/**
* Search for the first window below 'win' that has a focus directly within
* it's boundaries (excluding boundaries of its own descendants).
*
* @return The child window that has the pointer within its boundaries or
* NULL.
*/
static WindowPtr
FirstFocusChild(WindowPtr win)
{
int i;
for (i = 0; i < MAXDEVICES; i++) {
if (FocusWindows[i] && FocusWindows[i] != PointerRootWin &&
IsParent(win, FocusWindows[i]))
return FocusWindows[i];
}
return NULL;
}
/**
* Set the presence flag for dev to mark that it is now in 'win'.
*/
void
EnterWindow(DeviceIntPtr dev, WindowPtr win, int mode)
{
PointerWindows[dev->id] = win;
}
/**
* Unset the presence flag for dev to mark that it is not in 'win' anymore.
*/
void
LeaveWindow(DeviceIntPtr dev)
{
PointerWindows[dev->id] = NULL;
}
/**
* Set the presence flag for dev to mark that it is now in 'win'.
*/
void
SetFocusIn(DeviceIntPtr dev, WindowPtr win)
{
FocusWindows[dev->id] = win;
}
/**
* Unset the presence flag for dev to mark that it is not in 'win' anymore.
*/
void
SetFocusOut(DeviceIntPtr dev)
{
FocusWindows[dev->id] = NULL;
}
/**
* Return the common ancestor of 'a' and 'b' (if one exists).
* @param a A window with the same ancestor as b.
* @param b A window with the same ancestor as a.
* @return The window that is the first ancestor of both 'a' and 'b', or the
* NullWindow if they do not have a common ancestor.
*/
WindowPtr
CommonAncestor(WindowPtr a, WindowPtr b)
{
for (b = b->parent; b; b = b->parent)
if (IsParent(b, a))
return b;
return NullWindow;
}
/**
* Send enter notifies to all windows between 'ancestor' and 'child' (excluding
* both). Events are sent running up the window hierarchy. This function
* recurses.
*/
static void
DeviceEnterNotifies(DeviceIntPtr dev,
int sourceid,
WindowPtr ancestor, WindowPtr child, int mode, int detail)
{
WindowPtr parent = child->parent;
if (ancestor == parent)
return;
DeviceEnterNotifies(dev, sourceid, ancestor, parent, mode, detail);
DeviceEnterLeaveEvent(dev, sourceid, XI_Enter, mode, detail, parent,
child->drawable.id);
}
/**
* Send enter notifies to all windows between 'ancestor' and 'child' (excluding
* both). Events are sent running down the window hierarchy. This function
* recurses.
*/
static void
CoreEnterNotifies(DeviceIntPtr dev,
WindowPtr ancestor, WindowPtr child, int mode, int detail)
{
WindowPtr parent = child->parent;
if (ancestor == parent)
return;
CoreEnterNotifies(dev, ancestor, parent, mode, detail);
/* Case 3:
A is above W, B is a descendant
Classically: The move generates an EnterNotify on W with a detail of
Virtual or NonlinearVirtual
MPX:
Case 3A: There is at least one other pointer on W itself
P(W) doesn't change, so the event should be suppressed
Case 3B: Otherwise, if there is at least one other pointer in a
descendant
P(W) stays on the same descendant, or changes to a different
descendant. The event should be suppressed.
Case 3C: Otherwise:
P(W) moves from a window above W to a descendant. The subwindow
field is set to the child containing the descendant. The detail
may need to be changed from Virtual to NonlinearVirtual depending
on the previous P(W). */
if (!HasPointer(dev, parent) && !FirstPointerChild(parent))
CoreEnterLeaveEvent(dev, EnterNotify, mode, detail, parent,
child->drawable.id);
}
static void
CoreLeaveNotifies(DeviceIntPtr dev,
WindowPtr child, WindowPtr ancestor, int mode, int detail)
{
WindowPtr win;
if (ancestor == child)
return;
for (win = child->parent; win != ancestor; win = win->parent) {
/*Case 7:
A is a descendant of W, B is above W
Classically: A LeaveNotify is generated on W with a detail of Virtual
or NonlinearVirtual.
MPX:
Case 3A: There is at least one other pointer on W itself
P(W) doesn't change, the event should be suppressed.
Case 3B: Otherwise, if there is at least one other pointer in a
descendant
P(W) stays on the same descendant, or changes to a different
descendant. The event should be suppressed.
Case 3C: Otherwise:
P(W) changes from the descendant of W to a window above W.
The detail may need to be changed from Virtual to NonlinearVirtual
or vice-versa depending on the new P(W). */
/* If one window has a pointer or a child with a pointer, skip some
* work and exit. */
if (HasPointer(dev, win) || FirstPointerChild(win))
return;
CoreEnterLeaveEvent(dev, LeaveNotify, mode, detail, win,
child->drawable.id);
child = win;
}
}
/**
* Send leave notifies to all windows between 'child' and 'ancestor'.
* Events are sent running up the hierarchy.
*/
static void
DeviceLeaveNotifies(DeviceIntPtr dev,
int sourceid,
WindowPtr child, WindowPtr ancestor, int mode, int detail)
{
WindowPtr win;
if (ancestor == child)
return;
for (win = child->parent; win != ancestor; win = win->parent) {
DeviceEnterLeaveEvent(dev, sourceid, XI_Leave, mode, detail, win,
child->drawable.id);
child = win;
}
}
/**
* Pointer dev moves from A to B and A neither a descendant of B nor is
* B a descendant of A.
*/
static void
CoreEnterLeaveNonLinear(DeviceIntPtr dev, WindowPtr A, WindowPtr B, int mode)
{
WindowPtr X = CommonAncestor(A, B);
/* Case 4:
A is W, B is above W
Classically: The move generates a LeaveNotify on W with a detail of
Ancestor or Nonlinear
MPX:
Case 3A: There is at least one other pointer on W itself
P(W) doesn't change, the event should be suppressed
Case 3B: Otherwise, if there is at least one other pointer in a
descendant of W
P(W) changes from W to a descendant of W. The subwindow field
is set to the child containing the new P(W), the detail field
is set to Inferior
Case 3C: Otherwise:
The pointer window moves from W to a window above W.
The detail may need to be changed from Ancestor to Nonlinear or
vice versa depending on the the new P(W)
*/
if (!HasPointer(dev, A)) {
WindowPtr child = FirstPointerChild(A);
if (child)
CoreEnterLeaveEvent(dev, LeaveNotify, mode, NotifyInferior, A,
None);
else
CoreEnterLeaveEvent(dev, LeaveNotify, mode, NotifyNonlinear, A,
None);
}
CoreLeaveNotifies(dev, A, X, mode, NotifyNonlinearVirtual);
/*
Case 9:
A is a descendant of W, B is a descendant of W
Classically: No events are generated on W
MPX: The pointer window stays the same or moves to a different
descendant of W. No events should be generated on W.
Therefore, no event to X.
*/
CoreEnterNotifies(dev, X, B, mode, NotifyNonlinearVirtual);
/* Case 2:
A is above W, B=W
Classically: The move generates an EnterNotify on W with a detail of
Ancestor or Nonlinear
MPX:
Case 2A: There is at least one other pointer on W itself
P(W) doesn't change, so the event should be suppressed
Case 2B: Otherwise, if there is at least one other pointer in a
descendant
P(W) moves from a descendant to W. detail is changed to Inferior,
subwindow is set to the child containing the previous P(W)
Case 2C: Otherwise:
P(W) changes from a window above W to W itself.
The detail may need to be changed from Ancestor to Nonlinear
or vice-versa depending on the previous P(W). */
if (!HasPointer(dev, B)) {
WindowPtr child = FirstPointerChild(B);
if (child)
CoreEnterLeaveEvent(dev, EnterNotify, mode, NotifyInferior, B,
None);
else
CoreEnterLeaveEvent(dev, EnterNotify, mode, NotifyNonlinear, B,
None);
}
}
/**
* Pointer dev moves from A to B and A is a descendant of B.
*/
static void
CoreEnterLeaveToAncestor(DeviceIntPtr dev, WindowPtr A, WindowPtr B, int mode)
{
/* Case 4:
A is W, B is above W
Classically: The move generates a LeaveNotify on W with a detail of
Ancestor or Nonlinear
MPX:
Case 3A: There is at least one other pointer on W itself
P(W) doesn't change, the event should be suppressed
Case 3B: Otherwise, if there is at least one other pointer in a
descendant of W
P(W) changes from W to a descendant of W. The subwindow field
is set to the child containing the new P(W), the detail field
is set to Inferior
Case 3C: Otherwise:
The pointer window moves from W to a window above W.
The detail may need to be changed from Ancestor to Nonlinear or
vice versa depending on the the new P(W)
*/
if (!HasPointer(dev, A)) {
WindowPtr child = FirstPointerChild(A);
if (child)
CoreEnterLeaveEvent(dev, LeaveNotify, mode, NotifyInferior, A,
None);
else
CoreEnterLeaveEvent(dev, LeaveNotify, mode, NotifyAncestor, A,
None);
}
CoreLeaveNotifies(dev, A, B, mode, NotifyVirtual);
/* Case 8:
A is a descendant of W, B is W
Classically: A EnterNotify is generated on W with a detail of
NotifyInferior
MPX:
Case 3A: There is at least one other pointer on W itself
P(W) doesn't change, the event should be suppressed
Case 3B: Otherwise:
P(W) changes from a descendant to W itself. The subwindow
field should be set to the child containing the old P(W) <<< WRONG */
if (!HasPointer(dev, B))
CoreEnterLeaveEvent(dev, EnterNotify, mode, NotifyInferior, B, None);
}
/**
* Pointer dev moves from A to B and B is a descendant of A.
*/
static void
CoreEnterLeaveToDescendant(DeviceIntPtr dev, WindowPtr A, WindowPtr B, int mode)
{
/* Case 6:
A is W, B is a descendant of W
Classically: A LeaveNotify is generated on W with a detail of
NotifyInferior
MPX:
Case 3A: There is at least one other pointer on W itself
P(W) doesn't change, the event should be suppressed
Case 3B: Otherwise:
P(W) changes from W to a descendant of W. The subwindow field
is set to the child containing the new P(W) <<< THIS IS WRONG */
if (!HasPointer(dev, A))
CoreEnterLeaveEvent(dev, LeaveNotify, mode, NotifyInferior, A, None);
CoreEnterNotifies(dev, A, B, mode, NotifyVirtual);
/* Case 2:
A is above W, B=W
Classically: The move generates an EnterNotify on W with a detail of
Ancestor or Nonlinear
MPX:
Case 2A: There is at least one other pointer on W itself
P(W) doesn't change, so the event should be suppressed
Case 2B: Otherwise, if there is at least one other pointer in a
descendant
P(W) moves from a descendant to W. detail is changed to Inferior,
subwindow is set to the child containing the previous P(W)
Case 2C: Otherwise:
P(W) changes from a window above W to W itself.
The detail may need to be changed from Ancestor to Nonlinear
or vice-versa depending on the previous P(W). */
if (!HasPointer(dev, B)) {
WindowPtr child = FirstPointerChild(B);
if (child)
CoreEnterLeaveEvent(dev, EnterNotify, mode, NotifyInferior, B,
None);
else
CoreEnterLeaveEvent(dev, EnterNotify, mode, NotifyAncestor, B,
None);
}
}
static void
CoreEnterLeaveEvents(DeviceIntPtr dev, WindowPtr from, WindowPtr to, int mode)
{
if (!IsMaster(dev))
return;
LeaveWindow(dev);
if (IsParent(from, to))
CoreEnterLeaveToDescendant(dev, from, to, mode);
else if (IsParent(to, from))
CoreEnterLeaveToAncestor(dev, from, to, mode);
else
CoreEnterLeaveNonLinear(dev, from, to, mode);
EnterWindow(dev, to, mode);
}
static void
DeviceEnterLeaveEvents(DeviceIntPtr dev,
int sourceid, WindowPtr from, WindowPtr to, int mode)
{
if (IsParent(from, to)) {
DeviceEnterLeaveEvent(dev, sourceid, XI_Leave, mode, NotifyInferior,
from, None);
DeviceEnterNotifies(dev, sourceid, from, to, mode, NotifyVirtual);
DeviceEnterLeaveEvent(dev, sourceid, XI_Enter, mode, NotifyAncestor, to,
None);
}
else if (IsParent(to, from)) {
DeviceEnterLeaveEvent(dev, sourceid, XI_Leave, mode, NotifyAncestor,
from, None);
DeviceLeaveNotifies(dev, sourceid, from, to, mode, NotifyVirtual);
DeviceEnterLeaveEvent(dev, sourceid, XI_Enter, mode, NotifyInferior, to,
None);
}
else { /* neither from nor to is descendent of the other */
WindowPtr common = CommonAncestor(to, from);
/* common == NullWindow ==> different screens */
DeviceEnterLeaveEvent(dev, sourceid, XI_Leave, mode, NotifyNonlinear,
from, None);
DeviceLeaveNotifies(dev, sourceid, from, common, mode,
NotifyNonlinearVirtual);
DeviceEnterNotifies(dev, sourceid, common, to, mode,
NotifyNonlinearVirtual);
DeviceEnterLeaveEvent(dev, sourceid, XI_Enter, mode, NotifyNonlinear,
to, None);
}
}
/**
* Figure out if enter/leave events are necessary and send them to the
* appropriate windows.
*
* @param fromWin Window the sprite moved out of.
* @param toWin Window the sprite moved into.
*/
void
DoEnterLeaveEvents(DeviceIntPtr pDev,
int sourceid, WindowPtr fromWin, WindowPtr toWin, int mode)
{
if (!IsPointerDevice(pDev))
return;
if (fromWin == toWin)
return;
if (mode != XINotifyPassiveGrab && mode != XINotifyPassiveUngrab)
CoreEnterLeaveEvents(pDev, fromWin, toWin, mode);
DeviceEnterLeaveEvents(pDev, sourceid, fromWin, toWin, mode);
}
static void
FixDeviceValuator(DeviceIntPtr dev, deviceValuator * ev, ValuatorClassPtr v,
int first)
{
int nval = v->numAxes - first;
ev->type = DeviceValuator;
ev->deviceid = dev->id;
ev->num_valuators = nval < 3 ? nval : 3;
ev->first_valuator = first;
switch (ev->num_valuators) {
case 3:
ev->valuator2 = v->axisVal[first + 2];
case 2:
ev->valuator1 = v->axisVal[first + 1];
case 1:
ev->valuator0 = v->axisVal[first];
break;
}
first += ev->num_valuators;
}
static void
FixDeviceStateNotify(DeviceIntPtr dev, deviceStateNotify * ev, KeyClassPtr k,
ButtonClassPtr b, ValuatorClassPtr v, int first)
{
ev->type = DeviceStateNotify;
ev->deviceid = dev->id;
ev->time = currentTime.milliseconds;
ev->classes_reported = 0;
ev->num_keys = 0;
ev->num_buttons = 0;
ev->num_valuators = 0;
if (b) {
ev->classes_reported |= (1 << ButtonClass);
ev->num_buttons = b->numButtons;
memcpy((char *) ev->buttons, (char *) b->down, 4);
}
else if (k) {
ev->classes_reported |= (1 << KeyClass);
ev->num_keys = k->xkbInfo->desc->max_key_code -
k->xkbInfo->desc->min_key_code;
memmove((char *) &ev->keys[0], (char *) k->down, 4);
}
if (v) {
int nval = v->numAxes - first;
ev->classes_reported |= (1 << ValuatorClass);
ev->classes_reported |= valuator_get_mode(dev, 0) << ModeBitsShift;
ev->num_valuators = nval < 3 ? nval : 3;
switch (ev->num_valuators) {
case 3:
ev->valuator2 = v->axisVal[first + 2];
case 2:
ev->valuator1 = v->axisVal[first + 1];
case 1:
ev->valuator0 = v->axisVal[first];
break;
}
}
}
static void
DeliverStateNotifyEvent(DeviceIntPtr dev, WindowPtr win)
{
int evcount = 1;
deviceStateNotify *ev, *sev;
deviceKeyStateNotify *kev;
deviceButtonStateNotify *bev;
KeyClassPtr k;
ButtonClassPtr b;
ValuatorClassPtr v;
int nval = 0, nkeys = 0, nbuttons = 0, first = 0;
if (!(wOtherInputMasks(win)) ||
!(wOtherInputMasks(win)->inputEvents[dev->id] & DeviceStateNotifyMask))
return;
if ((b = dev->button) != NULL) {
nbuttons = b->numButtons;
if (nbuttons > 32)
evcount++;
}
if ((k = dev->key) != NULL) {
nkeys = k->xkbInfo->desc->max_key_code - k->xkbInfo->desc->min_key_code;
if (nkeys > 32)
evcount++;
if (nbuttons > 0) {
evcount++;
}
}
if ((v = dev->valuator) != NULL) {
nval = v->numAxes;
if (nval > 3)
evcount++;
if (nval > 6) {
if (!(k && b))
evcount++;
if (nval > 9)
evcount += ((nval - 7) / 3);
}
}
sev = ev = (deviceStateNotify *) malloc(evcount * sizeof(xEvent));
FixDeviceStateNotify(dev, ev, NULL, NULL, NULL, first);
if (b != NULL) {
FixDeviceStateNotify(dev, ev++, NULL, b, v, first);
first += 3;
nval -= 3;
if (nbuttons > 32) {
(ev - 1)->deviceid |= MORE_EVENTS;
bev = (deviceButtonStateNotify *) ev++;
bev->type = DeviceButtonStateNotify;
bev->deviceid = dev->id;
memcpy((char *) &bev->buttons[4], (char *) &b->down[4],
DOWN_LENGTH - 4);
}
if (nval > 0) {
(ev - 1)->deviceid |= MORE_EVENTS;
FixDeviceValuator(dev, (deviceValuator *) ev++, v, first);
first += 3;
nval -= 3;
}
}
if (k != NULL) {
FixDeviceStateNotify(dev, ev++, k, NULL, v, first);
first += 3;
nval -= 3;
if (nkeys > 32) {
(ev - 1)->deviceid |= MORE_EVENTS;
kev = (deviceKeyStateNotify *) ev++;
kev->type = DeviceKeyStateNotify;
kev->deviceid = dev->id;
memmove((char *) &kev->keys[0], (char *) &k->down[4], 28);
}
if (nval > 0) {
(ev - 1)->deviceid |= MORE_EVENTS;
FixDeviceValuator(dev, (deviceValuator *) ev++, v, first);
first += 3;
nval -= 3;
}
}
while (nval > 0) {
FixDeviceStateNotify(dev, ev++, NULL, NULL, v, first);
first += 3;
nval -= 3;
if (nval > 0) {
(ev - 1)->deviceid |= MORE_EVENTS;
FixDeviceValuator(dev, (deviceValuator *) ev++, v, first);
first += 3;
nval -= 3;
}
}
DeliverEventsToWindow(dev, win, (xEvent *) sev, evcount,
DeviceStateNotifyMask, NullGrab);
free(sev);
}
void
DeviceFocusEvent(DeviceIntPtr dev, int type, int mode, int detail,
WindowPtr pWin)
{
deviceFocus event;
xXIFocusInEvent *xi2event;
DeviceIntPtr mouse;
int btlen, len, i;
mouse = IsFloating(dev) ? dev : GetMaster(dev, MASTER_POINTER);
/* XI 2 event */
btlen = (mouse->button) ? bits_to_bytes(mouse->button->numButtons) : 0;
btlen = bytes_to_int32(btlen);
len = sizeof(xXIFocusInEvent) + btlen * 4;
xi2event = calloc(1, len);
xi2event->type = GenericEvent;
xi2event->extension = IReqCode;
xi2event->evtype = type;
xi2event->length = bytes_to_int32(len - sizeof(xEvent));
xi2event->buttons_len = btlen;
xi2event->detail = detail;
xi2event->time = currentTime.milliseconds;
xi2event->deviceid = dev->id;
xi2event->sourceid = dev->id; /* a device doesn't change focus by itself */
xi2event->mode = mode;
xi2event->root_x = double_to_fp1616(mouse->spriteInfo->sprite->hot.x);
xi2event->root_y = double_to_fp1616(mouse->spriteInfo->sprite->hot.y);
for (i = 0; mouse && mouse->button && i < mouse->button->numButtons; i++)
if (BitIsOn(mouse->button->down, i))
SetBit(&xi2event[1], mouse->button->map[i]);
if (dev->key) {
xi2event->mods.base_mods = dev->key->xkbInfo->state.base_mods;
xi2event->mods.latched_mods = dev->key->xkbInfo->state.latched_mods;
xi2event->mods.locked_mods = dev->key->xkbInfo->state.locked_mods;
xi2event->mods.effective_mods = dev->key->xkbInfo->state.mods;
xi2event->group.base_group = dev->key->xkbInfo->state.base_group;
xi2event->group.latched_group = dev->key->xkbInfo->state.latched_group;
xi2event->group.locked_group = dev->key->xkbInfo->state.locked_group;
xi2event->group.effective_group = dev->key->xkbInfo->state.group;
}
FixUpEventFromWindow(dev->spriteInfo->sprite, (xEvent *) xi2event, pWin,
None, FALSE);
DeliverEventsToWindow(dev, pWin, (xEvent *) xi2event, 1,
GetEventFilter(dev, (xEvent *) xi2event), NullGrab);
free(xi2event);
/* XI 1.x event */
event = (deviceFocus) {
.deviceid = dev->id,
.mode = mode,
.type = (type == XI_FocusIn) ? DeviceFocusIn : DeviceFocusOut,
.detail = detail,
.window = pWin->drawable.id,
.time = currentTime.milliseconds
};
DeliverEventsToWindow(dev, pWin, (xEvent *) &event, 1,
DeviceFocusChangeMask, NullGrab);
if (event.type == DeviceFocusIn)
DeliverStateNotifyEvent(dev, pWin);
}
/**
* Send focus out events to all windows between 'child' and 'ancestor'.
* Events are sent running up the hierarchy.
*/
static void
DeviceFocusOutEvents(DeviceIntPtr dev,
WindowPtr child, WindowPtr ancestor, int mode, int detail)
{
WindowPtr win;
if (ancestor == child)
return;
for (win = child->parent; win != ancestor; win = win->parent)
DeviceFocusEvent(dev, XI_FocusOut, mode, detail, win);
}
/**
* Send enter notifies to all windows between 'ancestor' and 'child' (excluding
* both). Events are sent running up the window hierarchy. This function
* recurses.
*/
static void
DeviceFocusInEvents(DeviceIntPtr dev,
WindowPtr ancestor, WindowPtr child, int mode, int detail)
{
WindowPtr parent = child->parent;
if (ancestor == parent || !parent)
return;
DeviceFocusInEvents(dev, ancestor, parent, mode, detail);
DeviceFocusEvent(dev, XI_FocusIn, mode, detail, parent);
}
/**
* Send FocusIn events to all windows between 'ancestor' and 'child' (excluding
* both). Events are sent running down the window hierarchy. This function
* recurses.
*/
static void
CoreFocusInEvents(DeviceIntPtr dev,
WindowPtr ancestor, WindowPtr child, int mode, int detail)
{
WindowPtr parent = child->parent;
if (ancestor == parent)
return;
CoreFocusInEvents(dev, ancestor, parent, mode, detail);
/* Case 3:
A is above W, B is a descendant
Classically: The move generates an FocusIn on W with a detail of
Virtual or NonlinearVirtual
MPX:
Case 3A: There is at least one other focus on W itself
F(W) doesn't change, so the event should be suppressed
Case 3B: Otherwise, if there is at least one other focus in a
descendant
F(W) stays on the same descendant, or changes to a different
descendant. The event should be suppressed.
Case 3C: Otherwise:
F(W) moves from a window above W to a descendant. The detail may
need to be changed from Virtual to NonlinearVirtual depending
on the previous F(W). */
if (!HasFocus(parent) && !FirstFocusChild(parent))
CoreFocusEvent(dev, FocusIn, mode, detail, parent);
}
static void
CoreFocusOutEvents(DeviceIntPtr dev,
WindowPtr child, WindowPtr ancestor, int mode, int detail)
{
WindowPtr win;
if (ancestor == child)
return;
for (win = child->parent; win != ancestor; win = win->parent) {
/*Case 7:
A is a descendant of W, B is above W
Classically: A FocusOut is generated on W with a detail of Virtual
or NonlinearVirtual.
MPX:
Case 3A: There is at least one other focus on W itself
F(W) doesn't change, the event should be suppressed.
Case 3B: Otherwise, if there is at least one other focus in a
descendant
F(W) stays on the same descendant, or changes to a different
descendant. The event should be suppressed.
Case 3C: Otherwise:
F(W) changes from the descendant of W to a window above W.
The detail may need to be changed from Virtual to NonlinearVirtual
or vice-versa depending on the new P(W). */
/* If one window has a focus or a child with a focuspointer, skip some
* work and exit. */
if (HasFocus(win) || FirstFocusChild(win))
return;
CoreFocusEvent(dev, FocusOut, mode, detail, win);
}
}
/**
* Send FocusOut(NotifyPointer) events from the current pointer window (which
* is a descendant of pwin_parent) up to (excluding) pwin_parent.
*
* NotifyPointer events are only sent for the device paired with dev.
*
* If the current pointer window is a descendant of 'exclude' or an ancestor of
* 'exclude', no events are sent. If the current pointer IS 'exclude', events
* are sent!
*/
static void
CoreFocusOutNotifyPointerEvents(DeviceIntPtr dev,
WindowPtr pwin_parent,
WindowPtr exclude, int mode, int inclusive)
{
WindowPtr P, stopAt;
P = PointerWin(GetMaster(dev, POINTER_OR_FLOAT));
if (!P)
return;
if (!IsParent(pwin_parent, P))
if (!(pwin_parent == P && inclusive))
return;
if (exclude != None && exclude != PointerRootWin &&
(IsParent(exclude, P) || IsParent(P, exclude)))
return;
stopAt = (inclusive) ? pwin_parent->parent : pwin_parent;
for (; P && P != stopAt; P = P->parent)
CoreFocusEvent(dev, FocusOut, mode, NotifyPointer, P);
}
/**
* DO NOT CALL DIRECTLY.
* Recursion helper for CoreFocusInNotifyPointerEvents.
*/
static void
CoreFocusInRecurse(DeviceIntPtr dev,
WindowPtr win, WindowPtr stopAt, int mode, int inclusive)
{
if ((!inclusive && win == stopAt) || !win)
return;
CoreFocusInRecurse(dev, win->parent, stopAt, mode, inclusive);
CoreFocusEvent(dev, FocusIn, mode, NotifyPointer, win);
}
/**
* Send FocusIn(NotifyPointer) events from pwin_parent down to
* including the current pointer window (which is a descendant of pwin_parent).
*
* @param pwin The pointer window.
* @param exclude If the pointer window is a child of 'exclude', no events are
* sent.
* @param inclusive If TRUE, pwin_parent will receive the event too.
*/
static void
CoreFocusInNotifyPointerEvents(DeviceIntPtr dev,
WindowPtr pwin_parent,
WindowPtr exclude, int mode, int inclusive)
{
WindowPtr P;
P = PointerWin(GetMaster(dev, POINTER_OR_FLOAT));
if (!P || P == exclude || (pwin_parent != P && !IsParent(pwin_parent, P)))
return;
if (exclude != None && (IsParent(exclude, P) || IsParent(P, exclude)))
return;
CoreFocusInRecurse(dev, P, pwin_parent, mode, inclusive);
}
/**
* Focus of dev moves from A to B and A neither a descendant of B nor is
* B a descendant of A.
*/
static void
CoreFocusNonLinear(DeviceIntPtr dev, WindowPtr A, WindowPtr B, int mode)
{
WindowPtr X = CommonAncestor(A, B);
/* Case 4:
A is W, B is above W
Classically: The change generates a FocusOut on W with a detail of
Ancestor or Nonlinear
MPX:
Case 3A: There is at least one other focus on W itself
F(W) doesn't change, the event should be suppressed
Case 3B: Otherwise, if there is at least one other focus in a
descendant of W
F(W) changes from W to a descendant of W. The detail field
is set to Inferior
Case 3C: Otherwise:
The focus window moves from W to a window above W.
The detail may need to be changed from Ancestor to Nonlinear or
vice versa depending on the the new F(W)
*/
if (!HasFocus(A)) {
WindowPtr child = FirstFocusChild(A);
if (child) {
/* NotifyPointer P-A unless P is child or below */
CoreFocusOutNotifyPointerEvents(dev, A, child, mode, FALSE);
CoreFocusEvent(dev, FocusOut, mode, NotifyInferior, A);
}
else {
/* NotifyPointer P-A */
CoreFocusOutNotifyPointerEvents(dev, A, None, mode, FALSE);
CoreFocusEvent(dev, FocusOut, mode, NotifyNonlinear, A);
}
}
CoreFocusOutEvents(dev, A, X, mode, NotifyNonlinearVirtual);
/*
Case 9:
A is a descendant of W, B is a descendant of W
Classically: No events are generated on W
MPX: The focus window stays the same or moves to a different
descendant of W. No events should be generated on W.
Therefore, no event to X.
*/
CoreFocusInEvents(dev, X, B, mode, NotifyNonlinearVirtual);
/* Case 2:
A is above W, B=W
Classically: The move generates an EnterNotify on W with a detail of
Ancestor or Nonlinear
MPX:
Case 2A: There is at least one other focus on W itself
F(W) doesn't change, so the event should be suppressed
Case 2B: Otherwise, if there is at least one other focus in a
descendant
F(W) moves from a descendant to W. detail is changed to Inferior.
Case 2C: Otherwise:
F(W) changes from a window above W to W itself.
The detail may need to be changed from Ancestor to Nonlinear
or vice-versa depending on the previous F(W). */
if (!HasFocus(B)) {
WindowPtr child = FirstFocusChild(B);
if (child) {
CoreFocusEvent(dev, FocusIn, mode, NotifyInferior, B);
/* NotifyPointer B-P unless P is child or below. */
CoreFocusInNotifyPointerEvents(dev, B, child, mode, FALSE);
}
else {
CoreFocusEvent(dev, FocusIn, mode, NotifyNonlinear, B);
/* NotifyPointer B-P unless P is child or below. */
CoreFocusInNotifyPointerEvents(dev, B, None, mode, FALSE);
}
}
}
/**
* Focus of dev moves from A to B and A is a descendant of B.
*/
static void
CoreFocusToAncestor(DeviceIntPtr dev, WindowPtr A, WindowPtr B, int mode)
{
/* Case 4:
A is W, B is above W
Classically: The change generates a FocusOut on W with a detail of
Ancestor or Nonlinear
MPX:
Case 3A: There is at least one other focus on W itself
F(W) doesn't change, the event should be suppressed
Case 3B: Otherwise, if there is at least one other focus in a
descendant of W
F(W) changes from W to a descendant of W. The detail field
is set to Inferior
Case 3C: Otherwise:
The focus window moves from W to a window above W.
The detail may need to be changed from Ancestor to Nonlinear or
vice versa depending on the the new F(W)
*/
if (!HasFocus(A)) {
WindowPtr child = FirstFocusChild(A);
if (child) {
/* NotifyPointer P-A unless P is child or below */
CoreFocusOutNotifyPointerEvents(dev, A, child, mode, FALSE);
CoreFocusEvent(dev, FocusOut, mode, NotifyInferior, A);
}
else
CoreFocusEvent(dev, FocusOut, mode, NotifyAncestor, A);
}
CoreFocusOutEvents(dev, A, B, mode, NotifyVirtual);
/* Case 8:
A is a descendant of W, B is W
Classically: A FocusOut is generated on W with a detail of
NotifyInferior
MPX:
Case 3A: There is at least one other focus on W itself
F(W) doesn't change, the event should be suppressed
Case 3B: Otherwise:
F(W) changes from a descendant to W itself. */
if (!HasFocus(B)) {
CoreFocusEvent(dev, FocusIn, mode, NotifyInferior, B);
/* NotifyPointer B-P unless P is A or below. */
CoreFocusInNotifyPointerEvents(dev, B, A, mode, FALSE);
}
}
/**
* Focus of dev moves from A to B and B is a descendant of A.
*/
static void
CoreFocusToDescendant(DeviceIntPtr dev, WindowPtr A, WindowPtr B, int mode)
{
/* Case 6:
A is W, B is a descendant of W
Classically: A FocusOut is generated on W with a detail of
NotifyInferior
MPX:
Case 3A: There is at least one other focus on W itself
F(W) doesn't change, the event should be suppressed
Case 3B: Otherwise:
F(W) changes from W to a descendant of W. */
if (!HasFocus(A)) {
/* NotifyPointer P-A unless P is B or below */
CoreFocusOutNotifyPointerEvents(dev, A, B, mode, FALSE);
CoreFocusEvent(dev, FocusOut, mode, NotifyInferior, A);
}
CoreFocusInEvents(dev, A, B, mode, NotifyVirtual);
/* Case 2:
A is above W, B=W
Classically: The move generates an FocusIn on W with a detail of
Ancestor or Nonlinear
MPX:
Case 2A: There is at least one other focus on W itself
F(W) doesn't change, so the event should be suppressed
Case 2B: Otherwise, if there is at least one other focus in a
descendant
F(W) moves from a descendant to W. detail is changed to Inferior.
Case 2C: Otherwise:
F(W) changes from a window above W to W itself.
The detail may need to be changed from Ancestor to Nonlinear
or vice-versa depending on the previous F(W). */
if (!HasFocus(B)) {
WindowPtr child = FirstFocusChild(B);
if (child) {
CoreFocusEvent(dev, FocusIn, mode, NotifyInferior, B);
/* NotifyPointer B-P unless P is child or below. */
CoreFocusInNotifyPointerEvents(dev, B, child, mode, FALSE);
}
else
CoreFocusEvent(dev, FocusIn, mode, NotifyAncestor, B);
}
}
static BOOL
HasOtherPointer(WindowPtr win, DeviceIntPtr exclude)
{
int i;
for (i = 0; i < MAXDEVICES; i++)
if (i != exclude->id && PointerWindows[i] == win)
return TRUE;
return FALSE;
}
/**
* Focus moves from PointerRoot to None or from None to PointerRoot.
* Assumption: Neither A nor B are valid windows.
*/
static void
CoreFocusPointerRootNoneSwitch(DeviceIntPtr dev,
WindowPtr A, /* PointerRootWin or NoneWin */
WindowPtr B, /* NoneWin or PointerRootWin */
int mode)
{
WindowPtr root;
int i;
int nscreens = screenInfo.numScreens;
#ifdef PANORAMIX
if (!noPanoramiXExtension)
nscreens = 1;
#endif
for (i = 0; i < nscreens; i++) {
root = screenInfo.screens[i]->root;
if (!HasOtherPointer(root, GetMaster(dev, POINTER_OR_FLOAT)) &&
!FirstFocusChild(root)) {
/* If pointer was on PointerRootWin and changes to NoneWin, and
* the pointer paired with dev is below the current root window,
* do a NotifyPointer run. */
if (dev->focus && dev->focus->win == PointerRootWin &&
B != PointerRootWin) {
WindowPtr ptrwin = PointerWin(GetMaster(dev, POINTER_OR_FLOAT));
if (ptrwin && IsParent(root, ptrwin))
CoreFocusOutNotifyPointerEvents(dev, root, None, mode,
TRUE);
}
CoreFocusEvent(dev, FocusOut, mode,
A ? NotifyPointerRoot : NotifyDetailNone, root);
CoreFocusEvent(dev, FocusIn, mode,
B ? NotifyPointerRoot : NotifyDetailNone, root);
if (B == PointerRootWin)
CoreFocusInNotifyPointerEvents(dev, root, None, mode, TRUE);
}
}
}
/**
* Focus moves from window A to PointerRoot or to None.
* Assumption: A is a valid window and not PointerRoot or None.
*/
static void
CoreFocusToPointerRootOrNone(DeviceIntPtr dev, WindowPtr A,
WindowPtr B, /* PointerRootWin or NoneWin */
int mode)
{
WindowPtr root;
int i;
int nscreens = screenInfo.numScreens;
#ifdef PANORAMIX
if (!noPanoramiXExtension)
nscreens = 1;
#endif
if (!HasFocus(A)) {
WindowPtr child = FirstFocusChild(A);
if (child) {
/* NotifyPointer P-A unless P is B or below */
CoreFocusOutNotifyPointerEvents(dev, A, B, mode, FALSE);
CoreFocusEvent(dev, FocusOut, mode, NotifyInferior, A);
}
else {
/* NotifyPointer P-A */
CoreFocusOutNotifyPointerEvents(dev, A, None, mode, FALSE);
CoreFocusEvent(dev, FocusOut, mode, NotifyNonlinear, A);
}
}
/* NullWindow means we include the root window */
CoreFocusOutEvents(dev, A, NullWindow, mode, NotifyNonlinearVirtual);
for (i = 0; i < nscreens; i++) {
root = screenInfo.screens[i]->root;
if (!HasFocus(root) && !FirstFocusChild(root)) {
CoreFocusEvent(dev, FocusIn, mode,
B ? NotifyPointerRoot : NotifyDetailNone, root);
if (B == PointerRootWin)
CoreFocusInNotifyPointerEvents(dev, root, None, mode, TRUE);
}
}
}
/**
* Focus moves from PointerRoot or None to a window B.
* Assumption: B is a valid window and not PointerRoot or None.
*/
static void
CoreFocusFromPointerRootOrNone(DeviceIntPtr dev,
WindowPtr A, /* PointerRootWin or NoneWin */
WindowPtr B, int mode)
{
WindowPtr root;
int i;
int nscreens = screenInfo.numScreens;
#ifdef PANORAMIX
if (!noPanoramiXExtension)
nscreens = 1;
#endif
for (i = 0; i < nscreens; i++) {
root = screenInfo.screens[i]->root;
if (!HasFocus(root) && !FirstFocusChild(root)) {
/* If pointer was on PointerRootWin and changes to NoneWin, and
* the pointer paired with dev is below the current root window,
* do a NotifyPointer run. */
if (dev->focus && dev->focus->win == PointerRootWin &&
B != PointerRootWin) {
WindowPtr ptrwin = PointerWin(GetMaster(dev, POINTER_OR_FLOAT));
if (ptrwin)
CoreFocusOutNotifyPointerEvents(dev, root, None, mode,
TRUE);
}
CoreFocusEvent(dev, FocusOut, mode,
A ? NotifyPointerRoot : NotifyDetailNone, root);
}
}
root = B; /* get B's root window */
while (root->parent)
root = root->parent;
if (B != root) {
CoreFocusEvent(dev, FocusIn, mode, NotifyNonlinearVirtual, root);
CoreFocusInEvents(dev, root, B, mode, NotifyNonlinearVirtual);
}
if (!HasFocus(B)) {
WindowPtr child = FirstFocusChild(B);
if (child) {
CoreFocusEvent(dev, FocusIn, mode, NotifyInferior, B);
/* NotifyPointer B-P unless P is child or below. */
CoreFocusInNotifyPointerEvents(dev, B, child, mode, FALSE);
}
else {
CoreFocusEvent(dev, FocusIn, mode, NotifyNonlinear, B);
/* NotifyPointer B-P unless P is child or below. */
CoreFocusInNotifyPointerEvents(dev, B, None, mode, FALSE);
}
}
}
static void
CoreFocusEvents(DeviceIntPtr dev, WindowPtr from, WindowPtr to, int mode)
{
if (!IsMaster(dev))
return;
SetFocusOut(dev);
if (((to == NullWindow) || (to == PointerRootWin)) &&
((from == NullWindow) || (from == PointerRootWin)))
CoreFocusPointerRootNoneSwitch(dev, from, to, mode);
else if ((to == NullWindow) || (to == PointerRootWin))
CoreFocusToPointerRootOrNone(dev, from, to, mode);
else if ((from == NullWindow) || (from == PointerRootWin))
CoreFocusFromPointerRootOrNone(dev, from, to, mode);
else if (IsParent(from, to))
CoreFocusToDescendant(dev, from, to, mode);
else if (IsParent(to, from))
CoreFocusToAncestor(dev, from, to, mode);
else
CoreFocusNonLinear(dev, from, to, mode);
SetFocusIn(dev, to);
}
static void
DeviceFocusEvents(DeviceIntPtr dev, WindowPtr from, WindowPtr to, int mode)
{
int out, in; /* for holding details for to/from
PointerRoot/None */
int i;
int nscreens = screenInfo.numScreens;
SpritePtr sprite = dev->spriteInfo->sprite;
if (from == to)
return;
out = (from == NoneWin) ? NotifyDetailNone : NotifyPointerRoot;
in = (to == NoneWin) ? NotifyDetailNone : NotifyPointerRoot;
/* wrong values if neither, but then not referenced */
#ifdef PANORAMIX
if (!noPanoramiXExtension)
nscreens = 1;
#endif
if ((to == NullWindow) || (to == PointerRootWin)) {
if ((from == NullWindow) || (from == PointerRootWin)) {
if (from == PointerRootWin)
DeviceFocusOutEvents(dev, sprite->win,
GetCurrentRootWindow(dev), mode,
NotifyPointer);
/* Notify all the roots */
for (i = 0; i < nscreens; i++)
DeviceFocusEvent(dev, XI_FocusOut, mode, out,
screenInfo.screens[i]->root);
}
else {
if (IsParent(from, sprite->win))
DeviceFocusOutEvents(dev, sprite->win, from, mode,
NotifyPointer);
DeviceFocusEvent(dev, XI_FocusOut, mode, NotifyNonlinear, from);
/* next call catches the root too, if the screen changed */
DeviceFocusOutEvents(dev, from, NullWindow, mode,
NotifyNonlinearVirtual);
}
/* Notify all the roots */
for (i = 0; i < nscreens; i++)
DeviceFocusEvent(dev, XI_FocusIn, mode, in,
screenInfo.screens[i]->root);
if (to == PointerRootWin) {
DeviceFocusInEvents(dev, GetCurrentRootWindow(dev), sprite->win,
mode, NotifyPointer);
DeviceFocusEvent(dev, XI_FocusIn, mode, NotifyPointer, sprite->win);
}
}
else {
if ((from == NullWindow) || (from == PointerRootWin)) {
if (from == PointerRootWin)
DeviceFocusOutEvents(dev, sprite->win,
GetCurrentRootWindow(dev), mode,
NotifyPointer);
for (i = 0; i < nscreens; i++)
DeviceFocusEvent(dev, XI_FocusOut, mode, out,
screenInfo.screens[i]->root);
if (to->parent != NullWindow)
DeviceFocusInEvents(dev, GetCurrentRootWindow(dev), to, mode,
NotifyNonlinearVirtual);
DeviceFocusEvent(dev, XI_FocusIn, mode, NotifyNonlinear, to);
if (IsParent(to, sprite->win))
DeviceFocusInEvents(dev, to, sprite->win, mode, NotifyPointer);
}
else {
if (IsParent(to, from)) {
DeviceFocusEvent(dev, XI_FocusOut, mode, NotifyAncestor, from);
DeviceFocusOutEvents(dev, from, to, mode, NotifyVirtual);
DeviceFocusEvent(dev, XI_FocusIn, mode, NotifyInferior, to);
if ((IsParent(to, sprite->win)) &&
(sprite->win != from) &&
(!IsParent(from, sprite->win)) &&
(!IsParent(sprite->win, from)))
DeviceFocusInEvents(dev, to, sprite->win, mode,
NotifyPointer);
}
else if (IsParent(from, to)) {
if ((IsParent(from, sprite->win)) &&
(sprite->win != from) &&
(!IsParent(to, sprite->win)) &&
(!IsParent(sprite->win, to)))
DeviceFocusOutEvents(dev, sprite->win, from, mode,
NotifyPointer);
DeviceFocusEvent(dev, XI_FocusOut, mode, NotifyInferior, from);
DeviceFocusInEvents(dev, from, to, mode, NotifyVirtual);
DeviceFocusEvent(dev, XI_FocusIn, mode, NotifyAncestor, to);
}
else {
/* neither from or to is child of other */
WindowPtr common = CommonAncestor(to, from);
/* common == NullWindow ==> different screens */
if (IsParent(from, sprite->win))
DeviceFocusOutEvents(dev, sprite->win, from, mode,
NotifyPointer);
DeviceFocusEvent(dev, XI_FocusOut, mode, NotifyNonlinear, from);
if (from->parent != NullWindow)
DeviceFocusOutEvents(dev, from, common, mode,
NotifyNonlinearVirtual);
if (to->parent != NullWindow)
DeviceFocusInEvents(dev, common, to, mode,
NotifyNonlinearVirtual);
DeviceFocusEvent(dev, XI_FocusIn, mode, NotifyNonlinear, to);
if (IsParent(to, sprite->win))
DeviceFocusInEvents(dev, to, sprite->win, mode,
NotifyPointer);
}
}
}
}
/**
* Figure out if focus events are necessary and send them to the
* appropriate windows.
*
* @param from Window the focus moved out of.
* @param to Window the focus moved into.
*/
void
DoFocusEvents(DeviceIntPtr pDev, WindowPtr from, WindowPtr to, int mode)
{
if (!IsKeyboardDevice(pDev))
return;
if (from == to)
return;
CoreFocusEvents(pDev, from, to, mode);
DeviceFocusEvents(pDev, from, to, mode);
}