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+/*
+Darwin event queue and event handling
+
+Copyright 2007 Apple Inc.
+Copyright 2004 Kaleb S. KEITHLEY. All Rights Reserved.
+Copyright (c) 2002-2004 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 <X11/X.h>
+#include <X11/Xmd.h>
+#include <X11/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.h"
+#include "darwinKeyboard.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;
+
+int input_check_zero, input_check_flag;
+
+static int old_flags = 0; // last known modifier state
+
+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;
+xEvent *darwinEvents;
+
+/*
+ * DarwinPressModifierMask
+ * Press or release the given modifier key, specified by its mask.
+ */
+static void DarwinPressModifierMask(
+ int pressed,
+ int mask) // one of NX_*MASK constants
+{
+ int key = DarwinModifierNXMaskToNXKey(mask);
+
+ if (key != -1) {
+ int keycode = DarwinModifierNXKeyToNXKeycode(key, 0);
+ if (keycode != 0)
+ DarwinSendKeyboardEvents(pressed, keycode);
+ }
+}
+
+#ifdef NX_DEVICELCTLKEYMASK
+#define CONTROL_MASK(flags) (flags & (NX_DEVICELCTLKEYMASK|NX_DEVICERCTLKEYMASK))
+#else
+#define CONTROL_MASK(flags) (NX_CONTROLMASK)
+#endif /* NX_DEVICELCTLKEYMASK */
+
+#ifdef NX_DEVICELSHIFTKEYMASK
+#define SHIFT_MASK(flags) (flags & (NX_DEVICELSHIFTKEYMASK|NX_DEVICERSHIFTKEYMASK))
+#else
+#define SHIFT_MASK(flags) (NX_SHIFTMASK)
+#endif /* NX_DEVICELSHIFTKEYMASK */
+
+#ifdef NX_DEVICELCMDKEYMASK
+#define COMMAND_MASK(flags) (flags & (NX_DEVICELCMDKEYMASK|NX_DEVICERCMDKEYMASK))
+#else
+#define COMMAND_MASK(flags) (NX_COMMANDMASK)
+#endif /* NX_DEVICELCMDKEYMASK */
+
+#ifdef NX_DEVICELALTKEYMASK
+#define ALTERNATE_MASK(flags) (flags & (NX_DEVICELALTKEYMASK|NX_DEVICERALTKEYMASK))
+#else
+#define ALTERNATE_MASK(flags) (NX_ALTERNATEMASK)
+#endif /* NX_DEVICELALTKEYMASK */
+
+/*
+ * DarwinUpdateModifiers
+ * Send events to update the modifier state.
+ */
+static void DarwinUpdateModifiers(
+ int pressed, // KeyPress or KeyRelease
+ int flags ) // modifier flags that have changed
+{
+ if (flags & NX_ALPHASHIFTMASK) {
+ DarwinPressModifierMask(pressed, NX_ALPHASHIFTMASK);
+ }
+ if (flags & NX_COMMANDMASK) {
+ DarwinPressModifierMask(pressed, COMMAND_MASK(flags));
+ }
+ if (flags & NX_CONTROLMASK) {
+ DarwinPressModifierMask(pressed, CONTROL_MASK(flags));
+ }
+ if (flags & NX_ALTERNATEMASK) {
+ DarwinPressModifierMask(pressed, ALTERNATE_MASK(flags));
+ }
+ if (flags & NX_SHIFTMASK) {
+ DarwinPressModifierMask(pressed, SHIFT_MASK(flags));
+ }
+ if (flags & NX_SECONDARYFNMASK) {
+ DarwinPressModifierMask(pressed, NX_SECONDARYFNMASK);
+ }
+}
+
+/*
+ * DarwinReleaseModifiers
+ * This hacky function releases all modifier keys. It should be called when X11.app
+ * is deactivated (kXDarwinDeactivate) to prevent modifiers from getting stuck if they
+ * are held down during a "context" switch -- otherwise, we would miss the KeyUp.
+ */
+static void DarwinReleaseModifiers(void) {
+ DarwinUpdateModifiers(KeyRelease, COMMAND_MASK(-1) | CONTROL_MASK(-1) | ALTERNATE_MASK(-1) | SHIFT_MASK(-1));
+}
+
+/*
+ * 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(
+ int pointer_x,
+ int pointer_y,
+ int whichButton, // mouse button to be pressed
+ int modifierMask) // modifiers used for the fake click
+{
+ // first fool X into forgetting about the keys
+ // for some reason, it's not enough to tell X we released the Command key --
+ // it has to be the *left* Command key.
+ if (modifierMask & NX_COMMANDMASK) modifierMask |=NX_DEVICELCMDKEYMASK ;
+ DarwinUpdateModifiers(KeyRelease, modifierMask);
+
+ // push the mouse button
+ DarwinSendPointerEvents(ButtonPress, whichButton, pointer_x, pointer_y);
+ DarwinSendPointerEvents(ButtonRelease, whichButton, pointer_x, pointer_y);
+
+ // restore old modifiers
+ DarwinUpdateModifiers(KeyPress, modifierMask);
+}
+
+
+Bool DarwinEQInit(DevicePtr pKbd, DevicePtr pPtr) {
+ darwinEvents = (xEvent *)malloc(sizeof(xEvent) * GetMaximumEventsNum());
+ mieqInit();
+ darwinEventQueue.head = darwinEventQueue.tail = 0;
+ darwinEventQueue.lastEventTime = GetTimeInMillis ();
+ darwinEventQueue.pKbd = pKbd;
+ darwinEventQueue.pPtr = pPtr;
+ darwinEventQueue.pEnqueueScreen = screenInfo.screens[0];
+ darwinEventQueue.pDequeueScreen = darwinEventQueue.pEnqueueScreen;
+ SetInputCheck(&input_check_zero, &input_check_flag);
+ 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.
+ *
+ * This should be deprecated in favor of miEQEnqueue -- BB
+ */
+void DarwinEQEnqueue(const xEvent *e) {
+ HWEventQueueType oldtail, newtail;
+ char byte = 0;
+
+ 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;
+
+ // Signal there is an event ready to handle
+ DarwinPokeEQ();
+}
+
+
+/*
+ * 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
+ input_check_flag=0;
+
+ // ErrorF("calling mieqProcessInputEvents\n");
+ mieqProcessInputEvents();
+
+ // Empty the signaling pipe
+ x = sizeof(xe);
+ while (x == sizeof(xe))
+ x = read(darwinEventReadFD, &xe, sizeof(xe));
+
+ while (darwinEventQueue.head != darwinEventQueue.tail)
+ {
+ if (screenIsSaved == SCREEN_SAVER_ON)
+ dixSaveScreens (serverClient, 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;
+
+ /* ErrorF("old rootX = (%d,%d) darwinMainScreen = (%d,%d) dixScreenOrigins[%d]=(%d,%d)\n",
+ xe.u.keyButtonPointer.rootX, xe.u.keyButtonPointer.rootY,
+ darwinMainScreenX, darwinMainScreenY,
+ miPointerCurrentScreen()->myNum,
+ dixScreenOrigins[miPointerCurrentScreen()->myNum].x,
+ 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:
+ ErrorF("Unexpected Keyboard event in DarwinProcessInputEvents\n");
+ break;
+
+ case ButtonPress:
+ ErrorF("Unexpected ButtonPress event in DarwinProcessInputEvents\n");
+ break;
+
+ case ButtonRelease:
+ ErrorF("Unexpected ButtonRelease event in DarwinProcessInputEvents\n");
+ break;
+
+ case MotionNotify:
+ ErrorF("Unexpected ButtonRelease event in DarwinProcessInputEvents\n");
+ break;
+
+ case kXDarwinUpdateModifiers:
+ ErrorF("Unexpected ButtonRelease event in DarwinProcessInputEvents\n");
+ break;
+
+ case kXDarwinUpdateButtons:
+ ErrorF("Unexpected XDarwinScrollWheel event in DarwinProcessInputEvents\n");
+ break;
+
+ case kXDarwinScrollWheel:
+ ErrorF("Unexpected XDarwinScrollWheel event in DarwinProcessInputEvents\n");
+ break;
+
+ case kXDarwinDeactivate:
+ DarwinReleaseModifiers();
+ // fall through
+ default:
+ // Check for mode specific event
+ QuartzProcessEvent(&xe);
+ }
+ }
+ }
+
+ // miPointerUpdate();
+}
+
+/* Sends a null byte down darwinEventWriteFD, which will cause the
+ Dispatch() event loop to check out event queue */
+void DarwinPokeEQ(void) {
+ char nullbyte=0;
+ input_check_flag++;
+ // <daniels> bushing: oh, i ... er ... christ.
+ write(darwinEventWriteFD, &nullbyte, 1);
+}
+
+void DarwinSendPointerEvents(int ev_type, int ev_button, int pointer_x, int pointer_y) {
+ static int darwinFakeMouseButtonDown = 0;
+ static int darwinFakeMouseButtonMask = 0;
+ int i, num_events;
+ int valuators[2] = {pointer_x, pointer_y};
+ if (ev_type == ButtonPress && darwinFakeButtons && ev_button == 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(pointer_x, pointer_y, 2, darwinFakeMouse2Mask);
+ darwinFakeMouseButtonDown = 2;
+ darwinFakeMouseButtonMask = darwinFakeMouse2Mask;
+ } else if ((old_flags & darwinFakeMouse3Mask) == darwinFakeMouse3Mask) {
+ DarwinSimulateMouseClick(pointer_x, pointer_y, 3, darwinFakeMouse3Mask);
+ darwinFakeMouseButtonDown = 3;
+ darwinFakeMouseButtonMask = darwinFakeMouse3Mask;
+ }
+ }
+ if (ev_type == ButtonRelease && darwinFakeButtons && 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.
+ ev_button = darwinFakeMouseButtonDown;
+ darwinFakeMouseButtonDown = 0;
+ // Bring modifiers back up to date
+ DarwinUpdateModifiers(KeyPress, darwinFakeMouseButtonMask & old_flags);
+ darwinFakeMouseButtonMask = 0;
+ }
+
+ num_events = GetPointerEvents(darwinEvents, darwinPointer, ev_type, ev_button,
+ POINTER_ABSOLUTE, 0, 2, valuators);
+
+ for(i=0; i<num_events; i++) mieqEnqueue (darwinPointer,&darwinEvents[i]);
+ DarwinPokeEQ();
+}
+
+void DarwinSendKeyboardEvents(int ev_type, int keycode) {
+ int i, num_events;
+ if (old_flags == 0 && darwinSyncKeymap && darwinKeymapFile == NULL) {
+ /* See if keymap has changed. */
+
+ static unsigned int last_seed;
+ unsigned int this_seed;
+
+ this_seed = QuartzSystemKeymapSeed();
+ if (this_seed != last_seed) {
+ last_seed = this_seed;
+ DarwinKeyboardReload(darwinKeyboard);
+ }
+ }
+
+ num_events = GetKeyboardEvents(darwinEvents, darwinKeyboard, ev_type, keycode + MIN_KEYCODE);
+ for(i=0; i<num_events; i++) mieqEnqueue(darwinKeyboard,&darwinEvents[i]);
+ DarwinPokeEQ();
+}
+
+/* Send the appropriate number of button 4 / 5 clicks to emulate scroll wheel */
+void DarwinSendScrollEvents(float count, int pointer_x, int pointer_y) {
+ int i;
+ int ev_button = count > 0.0f ? 4 : 5;
+ int valuators[2] = {pointer_x, pointer_y};
+
+ for (count = fabs(count); count > 0.0; count = count - 1.0f) {
+ int num_events = GetPointerEvents(darwinEvents, darwinPointer, ButtonPress, ev_button,
+ POINTER_ABSOLUTE, 0, 2, valuators);
+ for(i=0; i<num_events; i++) mieqEnqueue(darwinPointer,&darwinEvents[i]);
+ num_events = GetPointerEvents(darwinEvents, darwinPointer, ButtonRelease, ev_button,
+ POINTER_ABSOLUTE, 0, 2, valuators);
+ for(i=0; i<num_events; i++) mieqEnqueue(darwinPointer,&darwinEvents[i]);
+ }
+ DarwinPokeEQ();
+}
+
+/* Send the appropriate KeyPress/KeyRelease events to GetKeyboardEvents to
+ reflect changing modifier flags (alt, control, meta, etc) */
+void DarwinUpdateModKeys(int flags) {
+ DarwinUpdateModifiers(KeyRelease, old_flags & ~flags);
+ DarwinUpdateModifiers(KeyPress, ~old_flags & flags);
+ old_flags = flags;
+}
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