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Diffstat (limited to 'xserver/dix/enterleave.c')
| -rw-r--r-- | xserver/dix/enterleave.c | 1377 |
1 files changed, 1377 insertions, 0 deletions
diff --git a/xserver/dix/enterleave.c b/xserver/dix/enterleave.c new file mode 100644 index 000000000..8511dea6f --- /dev/null +++ b/xserver/dix/enterleave.c @@ -0,0 +1,1377 @@ +/* + * 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); +} |