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IABSD.fr/xenocara/xserver/dix/enterleave.c
matthieu
- xserver/dix/enterleave.c
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/* * 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(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. */ 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(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; } } /** * 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(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 (!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 = 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, 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 = WindowTable[i]; 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 = 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, 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); } /** * The root window the given device is currently on. */ #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, XI_FocusOut, mode, out, WindowTable[i]); } 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, 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, XI_FocusOut, mode, out, WindowTable[i]); if (to->parent != NullWindow) DeviceFocusInEvents(dev, RootWindow(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); }