diff options
Diffstat (limited to 'xorg-server/dix/enterleave.c')
| -rw-r--r-- | xorg-server/dix/enterleave.c | 2778 |
1 files changed, 1389 insertions, 1389 deletions
diff --git a/xorg-server/dix/enterleave.c b/xorg-server/dix/enterleave.c index 6be14190f..a39e64001 100644 --- a/xorg-server/dix/enterleave.c +++ b/xorg-server/dix/enterleave.c @@ -1,1389 +1,1389 @@ -/*
- * 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 "inputstr.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(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);
-}
-
-/**
- * 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(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).
- *
- * @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(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 = screenInfo.screens[i]->root;
- 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, 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(GetPairedDevice(dev));
- 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->parent, 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);
- }
- 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->parent, 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->parent, 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);
-}
+/* + * 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 "inputstr.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(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); +} + +/** + * 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->parent, 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); + } + 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->parent, 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->parent, 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); +} |