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xenocara/xserver/dix/enterleave.c

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update to xserver 1.6.4rc1. Tested by many, ok oga@.
2009-09-06 13:44:18 -06:00
/*
* 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 "windowstr.h"
#include "scrnintstr.h"
#include "exglobals.h"
#include "enterleave.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(WindowPtr win)
{
int i;
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.
*/
static void
LeaveWindow(DeviceIntPtr dev, WindowPtr win, int mode)
{
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, WindowPtr win)
{
FocusWindows[dev->id] = NULL;
}
/**
* @return The window that is the first ancestor of both a and b.
*/
WindowPtr
CommonAncestor(
WindowPtr a,
WindowPtr b)
{
for (b = b->parent; b; b = b->parent)
if (IsParent(b, a)) return b;
return NullWindow;
}
#if 0
/**
* Send enter notifies to all windows between @ancestor and @child (excluding
* both). Events are sent running up the window hierarchy. This function
* recurses.
* If @core is TRUE, core events are sent, otherwise XI events will be sent.
*/
static void
DeviceEnterNotifies(DeviceIntPtr dev,
WindowPtr ancestor,
WindowPtr child,
int mode,
int detail)
{
WindowPtr parent = child->parent;
if (ancestor == parent)
return;
DeviceEnterNotifies(dev, ancestor, parent, mode, detail);
DeviceEnterLeaveEvent(dev, DeviceEnterNotify, mode, detail, parent,
child->drawable.id);
}
#endif
/**
* 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(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(win) || FirstPointerChild(win))
return;
CoreEnterLeaveEvent(dev, LeaveNotify, mode, detail, win, child->drawable.id);
child = win;
}
}
#if 0
/**
* Send leave notifies to all windows between @child and @ancestor.
* Events are sent running up the hierarchy.
*/
static void
DeviceLeaveNotifies(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)
{
DeviceEnterLeaveEvent(dev, DeviceLeaveNotify, mode, detail, win,
child->drawable.id);
child = win;
}
}
#endif
/**
* 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(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(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(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(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(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(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 (!dev->isMaster)
return;
LeaveWindow(dev, from, mode);
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);
}
#if 0
static void
DeviceEnterLeaveEvents(DeviceIntPtr dev,
WindowPtr from,
WindowPtr to,
int mode)
{
if (IsParent(from, to))
{
DeviceEnterLeaveEvent(dev, DeviceLeaveNotify, mode, NotifyInferior, from, None);
DeviceEnterNotifies(dev, from, to, mode, NotifyVirtual);
DeviceEnterLeaveEvent(dev, DeviceEnterNotify, mode, NotifyAncestor, to, None);
}
else if (IsParent(to, from))
{
DeviceEnterLeaveEvent(dev, DeviceLeaveNotify, mode, NotifyAncestor, from, None);
DeviceLeaveNotifies(dev, from, to, mode, NotifyVirtual);
DeviceEnterLeaveEvent(dev, DeviceEnterNotify, 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, DeviceLeaveNotify, mode, NotifyNonlinear, from, None);
DeviceLeaveNotifies(dev, from, common, mode, NotifyNonlinearVirtual);
DeviceEnterNotifies(dev, common, to, mode, NotifyNonlinearVirtual);
DeviceEnterLeaveEvent(dev, DeviceEnterNotify, mode, NotifyNonlinear, to, None);
}
}
#endif
/**
* 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,
WindowPtr fromWin,
WindowPtr toWin,
int mode)
{
if (!IsPointerDevice(pDev))
return;
if (fromWin == toWin)
return;
CoreEnterLeaveEvents(pDev, fromWin, toWin, mode);
#if 0
DeviceEnterLeaveEvents(pDev, fromWin, toWin, mode);
#endif
}
/**
* 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, DeviceFocusOut, 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, DeviceFocusIn, 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 descendat of @exclude or an ancestor of
* @exclude, no events are sent. Note: 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(GetPairedDevice(dev));
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).
* If @inclusive is TRUE, @pwin_parent will receive the event too.
*
* @pwin is the pointer window.
*
* If the current pointer window is a child of @exclude, no events are sent.
*/
static void
CoreFocusInNotifyPointerEvents(DeviceIntPtr dev,
WindowPtr pwin_parent,
WindowPtr exclude,
int mode,
int inclusive)
{
WindowPtr P;
P = PointerWin(GetPairedDevice(dev));
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 = WindowTable[i];
if (!HasOtherPointer(root, GetPairedDevice(dev)) && !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(GetPairedDevice(dev));
if (ptrwin && IsParent(root, ptrwin))
CoreFocusOutNotifyPointerEvents(dev, root, None, mode, TRUE);
}
CoreFocusEvent(dev, FocusOut, mode, ((int)A) ? NotifyPointerRoot : NotifyDetailNone, root);
CoreFocusEvent(dev, FocusIn, mode, ((int)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 = WindowTable[i];
if (!HasFocus(root) && !FirstFocusChild(root))
{
CoreFocusEvent(dev, FocusIn, mode, ((int)B) ? NotifyPointerRoot : NotifyDetailNone, root);
if (B == PointerRootWin)
CoreFocusInNotifyPointerEvents(dev, root, None, mode, TRUE);
}
}
}
/**
* Focus moves from PointerRoot or None to a window @to.
* Assumption: @to 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 = WindowTable[i];
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(GetPairedDevice(dev));
if (ptrwin)
CoreFocusOutNotifyPointerEvents(dev, root, None, mode, TRUE);
}
CoreFocusEvent(dev, FocusOut, mode, ((int)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 (!dev->isMaster)
return;
SetFocusOut(dev, from);
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);
}
#define RootWindow(dev) dev->spriteInfo->sprite->spriteTrace[0]
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, RootWindow(dev), mode,
NotifyPointer);
/* Notify all the roots */
for (i = 0; i < nscreens; i++)
DeviceFocusEvent(dev, FocusOut, mode, out, WindowTable[i]);
}
else
{
if (IsParent(from, sprite->win))
DeviceFocusOutEvents(dev, sprite->win, from, mode,
NotifyPointer);
DeviceFocusEvent(dev, FocusOut, mode, NotifyNonlinear, from);
/* next call catches the root too, if the screen changed */
DeviceFocusOutEvents(dev, from->parent, NullWindow, mode,
NotifyNonlinearVirtual);
}
/* Notify all the roots */
for (i = 0; i < nscreens; i++)
DeviceFocusEvent(dev, FocusIn, mode, in, WindowTable[i]);
if (to == PointerRootWin)
DeviceFocusInEvents(dev, RootWindow(dev), sprite->win, mode, NotifyPointer);
}
else
{
if ((from == NullWindow) || (from == PointerRootWin))
{
if (from == PointerRootWin)
DeviceFocusOutEvents(dev, sprite->win, RootWindow(dev), mode,
NotifyPointer);
for (i = 0; i < nscreens; i++)
DeviceFocusEvent(dev, FocusOut, mode, out, WindowTable[i]);
if (to->parent != NullWindow)
DeviceFocusInEvents(dev, RootWindow(dev), to, mode, NotifyNonlinearVirtual);
DeviceFocusEvent(dev, FocusIn, mode, NotifyNonlinear, to);
if (IsParent(to, sprite->win))
DeviceFocusInEvents(dev, to, sprite->win, mode, NotifyPointer);
}
else
{
if (IsParent(to, from))
{
DeviceFocusEvent(dev, FocusOut, mode, NotifyAncestor, from);
DeviceFocusOutEvents(dev, from->parent, to, mode,
NotifyVirtual);
DeviceFocusEvent(dev, 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, FocusOut, mode, NotifyInferior, from);
DeviceFocusInEvents(dev, from, to, mode, NotifyVirtual);
DeviceFocusEvent(dev, 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, FocusOut, mode, NotifyNonlinear, from);
if (from->parent != NullWindow)
DeviceFocusOutEvents(dev, from->parent, common, mode,
NotifyNonlinearVirtual);
if (to->parent != NullWindow)
DeviceFocusInEvents(dev, common, to, mode, NotifyNonlinearVirtual);
DeviceFocusEvent(dev, 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);
}
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