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diff --git a/hw/darwin/darwinEvents.c b/hw/darwin/darwinEvents.c
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+/*
+ * Darwin event queue and event handling
+ */
+/*
+Copyright (c) 2002 Torrey T. Lyons. All Rights Reserved.
+
+This file is based on mieq.c by Keith Packard,
+which contains the following copyright:
+Copyright 1990, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice 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
+OPEN GROUP 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.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+ */
+
+#define NEED_EVENTS
+#include "X.h"
+#include "Xmd.h"
+#include "Xproto.h"
+#include "misc.h"
+#include "windowstr.h"
+#include "pixmapstr.h"
+#include "inputstr.h"
+#include "mi.h"
+#include "scrnintstr.h"
+#include "mipointer.h"
+
+#include "darwin.h"
+#include "quartz/quartz.h"
+
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <IOKit/hidsystem/IOLLEvent.h>
+
+/* Fake button press/release for scroll wheel move. */
+#define SCROLLWHEELUPFAKE 4
+#define SCROLLWHEELDOWNFAKE 5
+
+#define QUEUE_SIZE 256
+
+typedef struct _Event {
+ xEvent event;
+ ScreenPtr pScreen;
+} EventRec, *EventPtr;
+
+typedef struct _EventQueue {
+ HWEventQueueType head, tail; /* long for SetInputCheck */
+ CARD32 lastEventTime; /* to avoid time running backwards */
+ Bool lastMotion;
+ EventRec events[QUEUE_SIZE]; /* static allocation for signals */
+ DevicePtr pKbd, pPtr; /* device pointer, to get funcs */
+ ScreenPtr pEnqueueScreen; /* screen events are being delivered to */
+ ScreenPtr pDequeueScreen; /* screen events are being dispatched to */
+} EventQueueRec, *EventQueuePtr;
+
+static EventQueueRec darwinEventQueue;
+
+
+/*
+ * DarwinPressModifierMask
+ * Press or release the given modifier key, specified by its mask.
+ */
+static void DarwinPressModifierMask(
+ xEvent *xe, // must already have type, time and mouse location
+ int mask) // one of NX_*MASK constants
+{
+ int key = DarwinModifierNXMaskToNXKey(mask);
+
+ if (key != -1) {
+ int keycode = DarwinModifierNXKeyToNXKeycode(key, 0);
+ if (keycode != 0) {
+ xe->u.u.detail = keycode + MIN_KEYCODE;
+ (*darwinEventQueue.pKbd->processInputProc)(xe,
+ (DeviceIntPtr)darwinEventQueue.pKbd, 1);
+ }
+ }
+}
+
+
+/*
+ * DarwinUpdateModifiers
+ * Send events to update the modifier state.
+ */
+static void DarwinUpdateModifiers(
+ xEvent *xe, // event template with time and mouse position set
+ int pressed, // KeyPress or KeyRelease
+ int flags ) // modifier flags that have changed
+{
+ xe->u.u.type = pressed;
+ if (flags & NX_ALPHASHIFTMASK) {
+ DarwinPressModifierMask(xe, NX_ALPHASHIFTMASK);
+ }
+ if (flags & NX_COMMANDMASK) {
+ DarwinPressModifierMask(xe, NX_COMMANDMASK);
+ }
+ if (flags & NX_CONTROLMASK) {
+ DarwinPressModifierMask(xe, NX_CONTROLMASK);
+ }
+ if (flags & NX_ALTERNATEMASK) {
+ DarwinPressModifierMask(xe, NX_ALTERNATEMASK);
+ }
+ if (flags & NX_SHIFTMASK) {
+ DarwinPressModifierMask(xe, NX_SHIFTMASK);
+ }
+ if (flags & NX_SECONDARYFNMASK) {
+ DarwinPressModifierMask(xe, NX_SECONDARYFNMASK);
+ }
+}
+
+
+/*
+ * DarwinSimulateMouseClick
+ * Send a mouse click to X when multiple mouse buttons are simulated
+ * with modifier-clicks, such as command-click for button 2. The dix
+ * layer is told that the previously pressed modifier key(s) are
+ * released, the simulated click event is sent. After the mouse button
+ * is released, the modifier keys are reverted to their actual state,
+ * which may or may not be pressed at that point. This is usually
+ * closest to what the user wants. Ie. the user typically wants to
+ * simulate a button 2 press instead of Command-button 2.
+ */
+static void DarwinSimulateMouseClick(
+ xEvent *xe, // event template with time and
+ // mouse position filled in
+ int whichButton, // mouse button to be pressed
+ int modifierMask) // modifiers used for the fake click
+{
+ // first fool X into forgetting about the keys
+ DarwinUpdateModifiers(xe, KeyRelease, modifierMask);
+
+ // push the mouse button
+ xe->u.u.type = ButtonPress;
+ xe->u.u.detail = whichButton;
+ (*darwinEventQueue.pPtr->processInputProc)
+ (xe, (DeviceIntPtr)darwinEventQueue.pPtr, 1);
+}
+
+
+Bool
+DarwinEQInit(
+ DevicePtr pKbd,
+ DevicePtr pPtr)
+{
+ darwinEventQueue.head = darwinEventQueue.tail = 0;
+ darwinEventQueue.lastEventTime = GetTimeInMillis ();
+ darwinEventQueue.pKbd = pKbd;
+ darwinEventQueue.pPtr = pPtr;
+ darwinEventQueue.pEnqueueScreen = screenInfo.screens[0];
+ darwinEventQueue.pDequeueScreen = darwinEventQueue.pEnqueueScreen;
+ SetInputCheck (&darwinEventQueue.head, &darwinEventQueue.tail);
+ return TRUE;
+}
+
+
+/*
+ * DarwinEQEnqueue
+ * Must be thread safe with ProcessInputEvents.
+ * DarwinEQEnqueue - called from event gathering thread
+ * ProcessInputEvents - called from X server thread
+ * DarwinEQEnqueue should never be called from more than one thread.
+ */
+void
+DarwinEQEnqueue(
+ const xEvent *e)
+{
+ HWEventQueueType oldtail, newtail;
+
+ oldtail = darwinEventQueue.tail;
+
+ // mieqEnqueue() collapses successive motion events into one event.
+ // This is difficult to do in a thread-safe way and rarely useful.
+
+ newtail = oldtail + 1;
+ if (newtail == QUEUE_SIZE)
+ newtail = 0;
+ /* Toss events which come in late */
+ if (newtail == darwinEventQueue.head)
+ return;
+
+ darwinEventQueue.events[oldtail].event = *e;
+ /*
+ * Make sure that event times don't go backwards - this
+ * is "unnecessary", but very useful
+ */
+ if (e->u.keyButtonPointer.time < darwinEventQueue.lastEventTime &&
+ darwinEventQueue.lastEventTime - e->u.keyButtonPointer.time < 10000)
+ {
+ darwinEventQueue.events[oldtail].event.u.keyButtonPointer.time =
+ darwinEventQueue.lastEventTime;
+ }
+ darwinEventQueue.events[oldtail].pScreen = darwinEventQueue.pEnqueueScreen;
+
+ // Update the tail after the event is prepared
+ darwinEventQueue.tail = newtail;
+}
+
+
+/*
+ * DarwinEQPointerPost
+ * Post a pointer event. Used by the mipointer.c routines.
+ */
+void
+DarwinEQPointerPost(
+ xEvent *e)
+{
+ (*darwinEventQueue.pPtr->processInputProc)
+ (e, (DeviceIntPtr)darwinEventQueue.pPtr, 1);
+}
+
+
+void
+DarwinEQSwitchScreen(
+ ScreenPtr pScreen,
+ Bool fromDIX)
+{
+ darwinEventQueue.pEnqueueScreen = pScreen;
+ if (fromDIX)
+ darwinEventQueue.pDequeueScreen = pScreen;
+}
+
+
+/*
+ * ProcessInputEvents
+ * Read and process events from the event queue until it is empty.
+ */
+void ProcessInputEvents(void)
+{
+ EventRec *e;
+ int x, y;
+ xEvent xe;
+ static int old_flags = 0; // last known modifier state
+ // button number and modifier mask of currently pressed fake button
+ static int darwinFakeMouseButtonDown = 0;
+ static int darwinFakeMouseButtonMask = 0;
+
+ // Empty the signaling pipe
+ x = sizeof(xe);
+ while (x == sizeof(xe)) {
+ x = read(darwinEventFD, &xe, sizeof(xe));
+ }
+
+ while (darwinEventQueue.head != darwinEventQueue.tail)
+ {
+ if (screenIsSaved == SCREEN_SAVER_ON)
+ SaveScreens (SCREEN_SAVER_OFF, ScreenSaverReset);
+
+ e = &darwinEventQueue.events[darwinEventQueue.head];
+ xe = e->event;
+
+ // Shift from global screen coordinates to coordinates relative to
+ // the origin of the current screen.
+ xe.u.keyButtonPointer.rootX -= darwinMainScreenX +
+ dixScreenOrigins[miPointerCurrentScreen()->myNum].x;
+ xe.u.keyButtonPointer.rootY -= darwinMainScreenY +
+ dixScreenOrigins[miPointerCurrentScreen()->myNum].y;
+
+ /*
+ * Assumption - screen switching can only occur on motion events
+ */
+ if (e->pScreen != darwinEventQueue.pDequeueScreen)
+ {
+ darwinEventQueue.pDequeueScreen = e->pScreen;
+ x = xe.u.keyButtonPointer.rootX;
+ y = xe.u.keyButtonPointer.rootY;
+ if (darwinEventQueue.head == QUEUE_SIZE - 1)
+ darwinEventQueue.head = 0;
+ else
+ ++darwinEventQueue.head;
+ NewCurrentScreen (darwinEventQueue.pDequeueScreen, x, y);
+ }
+ else
+ {
+ if (darwinEventQueue.head == QUEUE_SIZE - 1)
+ darwinEventQueue.head = 0;
+ else
+ ++darwinEventQueue.head;
+ switch (xe.u.u.type)
+ {
+ case KeyPress:
+ case KeyRelease:
+ xe.u.u.detail += MIN_KEYCODE;
+ (*darwinEventQueue.pKbd->processInputProc)
+ (&xe, (DeviceIntPtr)darwinEventQueue.pKbd, 1);
+ break;
+
+ case ButtonPress:
+ miPointerAbsoluteCursor(xe.u.keyButtonPointer.rootX,
+ xe.u.keyButtonPointer.rootY,
+ xe.u.keyButtonPointer.time);
+ if (darwinFakeButtons && xe.u.u.detail == 1) {
+ // Mimic multi-button mouse with modifier-clicks
+ // If both sets of modifiers are pressed,
+ // button 2 is clicked.
+ if ((old_flags & darwinFakeMouse2Mask) ==
+ darwinFakeMouse2Mask)
+ {
+ DarwinSimulateMouseClick(&xe, 2, darwinFakeMouse2Mask);
+ darwinFakeMouseButtonDown = 2;
+ darwinFakeMouseButtonMask = darwinFakeMouse2Mask;
+ break;
+ }
+ else if ((old_flags & darwinFakeMouse3Mask) ==
+ darwinFakeMouse3Mask)
+ {
+ DarwinSimulateMouseClick(&xe, 3, darwinFakeMouse3Mask);
+ darwinFakeMouseButtonDown = 3;
+ darwinFakeMouseButtonMask = darwinFakeMouse3Mask;
+ break;
+ }
+ }
+ (*darwinEventQueue.pPtr->processInputProc)
+ (&xe, (DeviceIntPtr)darwinEventQueue.pPtr, 1);
+ break;
+
+ case ButtonRelease:
+ miPointerAbsoluteCursor(xe.u.keyButtonPointer.rootX,
+ xe.u.keyButtonPointer.rootY,
+ xe.u.keyButtonPointer.time);
+ if (darwinFakeButtons && xe.u.u.detail == 1 &&
+ darwinFakeMouseButtonDown)
+ {
+ // If last mousedown was a fake click, don't check for
+ // mouse modifiers here. The user may have released the
+ // modifiers before the mouse button.
+ xe.u.u.detail = darwinFakeMouseButtonDown;
+ darwinFakeMouseButtonDown = 0;
+ (*darwinEventQueue.pPtr->processInputProc)
+ (&xe, (DeviceIntPtr)darwinEventQueue.pPtr, 1);
+
+ // Bring modifiers back up to date
+ DarwinUpdateModifiers(&xe, KeyPress,
+ darwinFakeMouseButtonMask & old_flags);
+ darwinFakeMouseButtonMask = 0;
+ } else {
+ (*darwinEventQueue.pPtr->processInputProc)
+ (&xe, (DeviceIntPtr)darwinEventQueue.pPtr, 1);
+ }
+ break;
+
+ case MotionNotify:
+ miPointerAbsoluteCursor(xe.u.keyButtonPointer.rootX,
+ xe.u.keyButtonPointer.rootY,
+ xe.u.keyButtonPointer.time);
+ break;
+
+ case kXDarwinUpdateModifiers:
+ {
+ // Update modifier state.
+ // Any amount of modifiers may have changed.
+ int flags = xe.u.clientMessage.u.l.longs0;
+ DarwinUpdateModifiers(&xe, KeyRelease,
+ old_flags & ~flags);
+ DarwinUpdateModifiers(&xe, KeyPress,
+ ~old_flags & flags);
+ old_flags = flags;
+ break;
+ }
+
+ case kXDarwinUpdateButtons:
+ {
+ long hwDelta = xe.u.clientMessage.u.l.longs0;
+ long hwButtons = xe.u.clientMessage.u.l.longs1;
+ int i;
+
+ for (i = 1; i < 5; i++) {
+ if (hwDelta & (1 << i)) {
+ // IOKit and X have different numbering for the
+ // middle and right mouse buttons.
+ if (i == 1) {
+ xe.u.u.detail = 3;
+ } else if (i == 2) {
+ xe.u.u.detail = 2;
+ } else {
+ xe.u.u.detail = i + 1;
+ }
+ if (hwButtons & (1 << i)) {
+ xe.u.u.type = ButtonPress;
+ } else {
+ xe.u.u.type = ButtonRelease;
+ }
+ (*darwinEventQueue.pPtr->processInputProc)
+ (&xe, (DeviceIntPtr)darwinEventQueue.pPtr, 1);
+ }
+ }
+ break;
+ }
+
+ case kXDarwinScrollWheel:
+ {
+ short count = xe.u.clientMessage.u.s.shorts0;
+
+ if (count > 0) {
+ xe.u.u.detail = SCROLLWHEELUPFAKE;
+ } else {
+ xe.u.u.detail = SCROLLWHEELDOWNFAKE;
+ count = -count;
+ }
+
+ for (; count; --count) {
+ xe.u.u.type = ButtonPress;
+ (*darwinEventQueue.pPtr->processInputProc)
+ (&xe, (DeviceIntPtr)darwinEventQueue.pPtr, 1);
+ xe.u.u.type = ButtonRelease;
+ (*darwinEventQueue.pPtr->processInputProc)
+ (&xe, (DeviceIntPtr)darwinEventQueue.pPtr, 1);
+ }
+ break;
+ }
+
+ default:
+ if (quartz) {
+ QuartzProcessEvent(&xe);
+ } else {
+ ErrorF("Unknown X event caught: %d\n", xe.u.u.type);
+ }
+ }
+ }
+ }
+
+ miPointerUpdate();
+}
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