git mesa pixman xserver xkeyboard-config update 24 dec 2011

1 files changed, 982 insertions, 0 deletions

diff --git a/xorg-server/dix/touch.c b/xorg-server/dix/touch.c
new file mode 100644
index 000000000..db0bf334a
--- /dev/null
+++ b/xorg-server/dix/touch.c
@@ -0,0 +1,982 @@
+/*
+ * Copyright © 2011 Collabra Ltd.
+ * Copyright © 2011 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.
+ *
+ * Author: Daniel Stone <daniel@fooishbar.org>
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include "inputstr.h"
+#include "scrnintstr.h"
+#include "dixgrabs.h"
+
+#include "eventstr.h"
+#include "exevents.h"
+#include "inpututils.h"
+#include "eventconvert.h"
+#include "windowstr.h"
+#include "mi.h"
+
+#define TOUCH_HISTORY_SIZE 100
+
+
+/* If a touch queue resize is needed, the device id's bit is set. */
+static unsigned char resize_waiting[(MAXDEVICES + 7)/8];
+
+/**
+ * Some documentation about touch points:
+ * The driver submits touch events with it's own (unique) touch point ID.
+ * The driver may re-use those IDs, the DDX doesn't care. It just passes on
+ * the data to the DIX. In the server, the driver's ID is referred to as the
+ * DDX id anyway.
+ *
+ * On a TouchBegin, we create a DDXTouchPointInfo that contains the DDX id
+ * and the client ID that this touchpoint will have. The client ID is the
+ * one visible on the protocol.
+ *
+ * TouchUpdate and TouchEnd will only be processed if there is an active
+ * touchpoint with the same DDX id.
+ *
+ * The DDXTouchPointInfo struct is stored dev->last.touches. When the event
+ * being processed, it becomes a TouchPointInfo in dev->touch-touches which
+ * contains amongst other things the sprite trace and delivery information.
+ */
+
+/**
+ * Check which devices need a bigger touch event queue and grow their
+ * last.touches by half it's current size.
+ *
+ * @param client Always the serverClient
+ * @param closure Always NULL
+ *
+ * @return Always True. If we fail to grow we probably will topple over soon
+ * anyway and re-executing this won't help.
+ */
+static Bool
+TouchResizeQueue(ClientPtr client, pointer closure)
+{
+    int i;
+
+    OsBlockSignals();
+
+    /* first two ids are reserved */
+    for (i = 2; i < MAXDEVICES; i++)
+    {
+        DeviceIntPtr dev;
+        DDXTouchPointInfoPtr tmp;
+        size_t size;
+
+        if (!BitIsOn(resize_waiting, i))
+            continue;
+
+        ClearBit(resize_waiting, i);
+
+        /* device may have disappeared by now */
+        dixLookupDevice(&dev, i, serverClient, DixWriteAccess);
+        if (!dev)
+            continue;
+
+        /* Need to grow the queue means dropping events. Grow sufficiently so we
+         * don't need to do it often */
+        size = dev->last.num_touches + dev->last.num_touches/2 + 1;
+
+        tmp = realloc(dev->last.touches, size *  sizeof(*dev->last.touches));
+        if (tmp)
+        {
+            int i;
+            dev->last.touches = tmp;
+            for (i = dev->last.num_touches; i < size; i++)
+                TouchInitDDXTouchPoint(dev, &dev->last.touches[i]);
+            dev->last.num_touches = size;
+        }
+
+    }
+    OsReleaseSignals();
+
+    return TRUE;
+}
+
+/**
+ * Given the DDX-facing ID (which is _not_ DeviceEvent::detail.touch), find the
+ * associated DDXTouchPointInfoRec.
+ *
+ * @param dev The device to create the touch point for
+ * @param ddx_id Touch id assigned by the driver/ddx
+ * @param create Create the touchpoint if it cannot be found
+ */
+DDXTouchPointInfoPtr
+TouchFindByDDXID(DeviceIntPtr dev, uint32_t ddx_id, Bool create)
+{
+    DDXTouchPointInfoPtr ti;
+    int i;
+
+    if (!dev->touch)
+        return NULL;
+
+    for (i = 0; i < dev->last.num_touches; i++)
+    {
+        ti = &dev->last.touches[i];
+        if (ti->active && ti->ddx_id == ddx_id)
+            return ti;
+    }
+
+    return create ? TouchBeginDDXTouch(dev, ddx_id) : NULL;
+}
+
+/**
+ * Given a unique DDX ID for a touchpoint, create a touchpoint record and
+ * return it.
+ *
+ * If no other touch points are active, mark new touchpoint for pointer
+ * emulation.
+ *
+ * Returns NULL on failure (i.e. if another touch with that ID is already active,
+ * allocation failure).
+ */
+DDXTouchPointInfoPtr
+TouchBeginDDXTouch(DeviceIntPtr dev, uint32_t ddx_id)
+{
+    static int next_client_id = 1;
+    int i;
+    TouchClassPtr t = dev->touch;
+    DDXTouchPointInfoPtr ti = NULL;
+    Bool emulate_pointer = (t->mode == XIDirectTouch);
+
+    if (!t)
+        return NULL;
+
+    /* Look for another active touchpoint with the same DDX ID. DDX
+     * touchpoints must be unique. */
+    if (TouchFindByDDXID(dev, ddx_id, FALSE))
+        return NULL;
+
+    for (i = 0; i < dev->last.num_touches; i++)
+    {
+        /* Only emulate pointer events on the first touch */
+        if (dev->last.touches[i].active)
+            emulate_pointer = FALSE;
+        else if (!ti) /* ti is now first non-active touch rec */
+            ti = &dev->last.touches[i];
+
+        if (!emulate_pointer && ti)
+            break;
+    }
+
+    if (ti)
+    {
+        int client_id;
+        ti->active = TRUE;
+        ti->ddx_id = ddx_id;
+        client_id = next_client_id;
+        next_client_id++;
+        if (next_client_id == 0)
+            next_client_id = 1;
+        ti->client_id = client_id;
+        ti->emulate_pointer = emulate_pointer;
+        return ti;
+    }
+
+    /* If we get here, then we've run out of touches and we need to drop the
+     * event (we're inside the SIGIO handler here) schedule a WorkProc to
+     * grow the queue for us for next time. */
+    ErrorF("%s: not enough space for touch events (max %d touchpoints). "
+           "Dropping this event.\n", dev->name, dev->last.num_touches);
+    if (!BitIsOn(resize_waiting, dev->id)) {
+        SetBit(resize_waiting, dev->id);
+        QueueWorkProc(TouchResizeQueue, serverClient, NULL);
+    }
+
+    return NULL;
+}
+
+void
+TouchEndDDXTouch(DeviceIntPtr dev, DDXTouchPointInfoPtr ti)
+{
+    TouchClassPtr t = dev->touch;
+
+    if (!t)
+        return;
+
+    ti->active = FALSE;
+}
+
+void
+TouchInitDDXTouchPoint(DeviceIntPtr dev, DDXTouchPointInfoPtr ddxtouch)
+{
+    memset(ddxtouch, 0, sizeof(*ddxtouch));
+    ddxtouch->valuators = valuator_mask_new(dev->valuator->numAxes);
+}
+
+
+Bool
+TouchInitTouchPoint(TouchClassPtr t, ValuatorClassPtr v, int index)
+{
+    TouchPointInfoPtr ti;
+
+    if (index >= t->num_touches)
+        return FALSE;
+    ti = &t->touches[index];
+
+    memset(ti, 0, sizeof(*ti));
+
+    ti->valuators = valuator_mask_new(v->numAxes);
+    if (!ti->valuators)
+        return FALSE;
+
+    ti->sprite.spriteTrace = calloc(32, sizeof(*ti->sprite.spriteTrace));
+    if (!ti->sprite.spriteTrace)
+    {
+        valuator_mask_free(&ti->valuators);
+        return FALSE;
+    }
+    ti->sprite.spriteTraceSize = 32;
+    ti->sprite.spriteTrace[0] = screenInfo.screens[0]->root;
+    ti->sprite.hot.pScreen = screenInfo.screens[0];
+    ti->sprite.hotPhys.pScreen = screenInfo.screens[0];
+
+    ti->client_id = -1;
+
+    return TRUE;
+}
+
+void
+TouchFreeTouchPoint(DeviceIntPtr device, int index)
+{
+    TouchPointInfoPtr ti;
+
+    if (!device->touch || index >= device->touch->num_touches)
+        return;
+    ti = &device->touch->touches[index];
+
+    if (ti->active)
+        TouchEndTouch(device, ti);
+
+    valuator_mask_free(&ti->valuators);
+    free(ti->sprite.spriteTrace);
+    ti->sprite.spriteTrace = NULL;
+    free(ti->listeners);
+    ti->listeners = NULL;
+    free(ti->history);
+    ti->history = NULL;
+    ti->history_size = 0;
+    ti->history_elements = 0;
+}
+
+/**
+ * Given a client-facing ID (e.g. DeviceEvent::detail.touch), find the
+ * associated TouchPointInfoRec.
+ */
+TouchPointInfoPtr
+TouchFindByClientID(DeviceIntPtr dev, uint32_t client_id)
+{
+    TouchClassPtr t = dev->touch;
+    TouchPointInfoPtr ti;
+    int i;
+
+    if (!t)
+        return NULL;
+
+    for (i = 0; i < t->num_touches; i++)
+    {
+        ti = &t->touches[i];
+        if (ti->active && ti->client_id == client_id)
+            return ti;
+    }
+
+    return NULL;
+}
+
+
+/**
+ * Given a unique ID for a touchpoint, create a touchpoint record in the
+ * server.
+ *
+ * Returns NULL on failure (i.e. if another touch with that ID is already active,
+ * allocation failure).
+ */
+TouchPointInfoPtr
+TouchBeginTouch(DeviceIntPtr dev, int sourceid, uint32_t touchid,
+                Bool emulate_pointer)
+{
+    int i;
+    TouchClassPtr t = dev->touch;
+    TouchPointInfoPtr ti;
+    void *tmp;
+
+    if (!t)
+        return NULL;
+
+    /* Look for another active touchpoint with the same client ID.  It's
+     * technically legitimate for a touchpoint to still exist with the same
+     * ID but only once the 32 bits wrap over and you've used up 4 billion
+     * touch ids without lifting that one finger off once. In which case
+     * you deserve a medal or something, but not error handling code. */
+    if (TouchFindByClientID(dev, touchid))
+        return NULL;
+
+try_find_touch:
+    for (i = 0; i < t->num_touches; i++)
+    {
+        ti = &t->touches[i];
+        if (!ti->active) {
+            ti->active = TRUE;
+            ti->client_id = touchid;
+            ti->sourceid = sourceid;
+            ti->emulate_pointer = emulate_pointer;
+            return ti;
+        }
+    }
+
+    /* If we get here, then we've run out of touches: enlarge dev->touch and
+     * try again. */
+    tmp = realloc(t->touches, (t->num_touches + 1) * sizeof(*ti));
+    if (tmp)
+    {
+        t->touches = tmp;
+        t->num_touches++;
+        if (TouchInitTouchPoint(t, dev->valuator, t->num_touches - 1))
+            goto try_find_touch;
+    }
+
+    return NULL;
+}
+
+/**
+ * Releases a touchpoint for use: this must only be called after all events
+ * related to that touchpoint have been sent and finalised.  Called from
+ * ProcessTouchEvent and friends.  Not by you.
+ */
+void
+TouchEndTouch(DeviceIntPtr dev, TouchPointInfoPtr ti)
+{
+    if (ti->emulate_pointer)
+    {
+        GrabPtr grab;
+        DeviceEvent ev;
+        memset(&ev, 0, sizeof(ev));
+        ev.type = ET_TouchEnd;
+        ev.detail.button = 1;
+        ev.touchid = ti->client_id;
+        ev.flags = TOUCH_POINTER_EMULATED|TOUCH_END;
+        UpdateDeviceState(dev, &ev);
+
+        if ((grab = dev->deviceGrab.grab))
+        {
+            if (dev->deviceGrab.fromPassiveGrab &&
+                !dev->button->buttonsDown &&
+                !dev->touch->buttonsDown &&
+                GrabIsPointerGrab(grab))
+                (*dev->deviceGrab.DeactivateGrab)(dev);
+        }
+    }
+
+    ti->active = FALSE;
+    ti->pending_finish = FALSE;
+    ti->sprite.spriteTraceGood = 0;
+    free(ti->listeners);
+    ti->listeners = NULL;
+    ti->num_listeners = 0;
+    ti->num_grabs = 0;
+    ti->client_id = 0;
+
+    TouchEventHistoryFree(ti);
+
+    valuator_mask_zero(ti->valuators);
+}
+
+/**
+ * Allocate the event history for this touch pointer. Calling this on a
+ * touchpoint that already has an event history does nothing but counts as
+ * as success.
+ *
+ * @return TRUE on success, FALSE on allocation errors
+ */
+Bool
+TouchEventHistoryAllocate(TouchPointInfoPtr ti)
+{
+    if (ti->history)
+        return TRUE;
+
+    ti->history = calloc(TOUCH_HISTORY_SIZE, sizeof(*ti->history));
+    ti->history_elements = 0;
+    if (ti->history)
+        ti->history_size = TOUCH_HISTORY_SIZE;
+    return ti->history != NULL;
+}
+
+void
+TouchEventHistoryFree(TouchPointInfoPtr ti)
+{
+    free(ti->history);
+    ti->history = NULL;
+    ti->history_size = 0;
+    ti->history_elements = 0;
+}
+
+/**
+ * Store the given event on the event history (if one exists)
+ * A touch event history consists of one TouchBegin and several TouchUpdate
+ * events (if applicable) but no TouchEnd event.
+ * If more than one TouchBegin is pushed onto the stack, the push is
+ * ignored, calling this function multiple times for the TouchBegin is
+ * valid.
+ */
+void
+TouchEventHistoryPush(TouchPointInfoPtr ti, const DeviceEvent *ev)
+{
+    if (!ti->history)
+        return;
+
+    switch(ev->type)
+    {
+        case ET_TouchBegin:
+            /* don't store the same touchbegin twice */
+            if (ti->history_elements > 0)
+                return;
+            break;
+        case ET_TouchUpdate:
+            break;
+        case ET_TouchEnd:
+            return; /* no TouchEnd events in the history */
+        default:
+            return;
+    }
+
+    /* We only store real events in the history */
+    if (ev->flags & (TOUCH_CLIENT_ID|TOUCH_REPLAYING))
+        return;
+
+    ti->history[ti->history_elements++] = *ev;
+    /* FIXME: proper overflow fixes */
+    if (ti->history_elements > ti->history_size - 1)
+    {
+        ti->history_elements = ti->history_size - 1;
+        DebugF("source device %d: history size %d overflowing for touch %u\n",
+                ti->sourceid, ti->history_size, ti->client_id);
+    }
+}
+
+void
+TouchEventHistoryReplay(TouchPointInfoPtr ti, DeviceIntPtr dev, XID resource)
+{
+    InternalEvent *tel = InitEventList(GetMaximumEventsNum());
+    ValuatorMask *mask = valuator_mask_new(0);
+    int i, nev;
+    int flags;
+
+    if (!ti->history)
+        return;
+
+    valuator_mask_set_double(mask, 0, ti->history[0].valuators.data[0]);
+    valuator_mask_set_double(mask, 1, ti->history[0].valuators.data[1]);
+
+    flags = TOUCH_CLIENT_ID|TOUCH_REPLAYING;
+    if (ti->emulate_pointer)
+        flags |= TOUCH_POINTER_EMULATED;
+    /* send fake begin event to next owner */
+    nev = GetTouchEvents(tel, dev, ti->client_id, XI_TouchBegin, flags, mask);
+    for (i = 0; i < nev; i++)
+        DeliverTouchEvents(dev, ti, tel + i, resource);
+
+    valuator_mask_free(&mask);
+    FreeEventList(tel, GetMaximumEventsNum());
+
+    /* First event was TouchBegin, already replayed that one */
+    for (i = 1; i < ti->history_elements; i++)
+    {
+        DeviceEvent *ev = &ti->history[i];
+        ev->flags |= TOUCH_REPLAYING;
+        DeliverTouchEvents(dev, ti, (InternalEvent*)ev, resource);
+    }
+}
+
+Bool
+TouchBuildDependentSpriteTrace(DeviceIntPtr dev, SpritePtr sprite)
+{
+    int i;
+    TouchClassPtr t = dev->touch;
+    WindowPtr *trace;
+    SpritePtr srcsprite;
+
+    /* All touches should have the same sprite trace, so find and reuse an
+     * existing touch's sprite if possible, else use the device's sprite. */
+    for (i = 0; i < t->num_touches; i++)
+        if (t->touches[i].sprite.spriteTraceGood > 0)
+            break;
+    if (i < t->num_touches)
+        srcsprite = &t->touches[i].sprite;
+    else if (dev->spriteInfo->sprite)
+        srcsprite = dev->spriteInfo->sprite;
+    else
+        return FALSE;
+
+    if (srcsprite->spriteTraceGood > sprite->spriteTraceSize)
+    {
+        trace = realloc(sprite->spriteTrace,
+                srcsprite->spriteTraceSize * sizeof(*trace));
+        if (!trace)
+        {
+            sprite->spriteTraceGood = 0;
+            return FALSE;
+        }
+        sprite->spriteTrace = trace;
+        sprite->spriteTraceSize = srcsprite->spriteTraceGood;
+    }
+    memcpy(sprite->spriteTrace, srcsprite->spriteTrace,
+            srcsprite->spriteTraceGood * sizeof(*trace));
+    sprite->spriteTraceGood = srcsprite->spriteTraceGood;
+
+    return TRUE;
+}
+
+/**
+ * Ensure a window trace is present in ti->sprite, constructing one for
+ * TouchBegin events.
+ */
+Bool
+TouchEnsureSprite(DeviceIntPtr sourcedev, TouchPointInfoPtr ti,
+                  InternalEvent *ev)
+{
+    TouchClassPtr t = sourcedev->touch;
+    SpritePtr sprite = &ti->sprite;
+
+    /* We may not have a sprite if there are no applicable grabs or
+     * event selections, or if they've disappeared, or if all the grab
+     * owners have rejected the touch.  Don't bother delivering motion
+     * events if not, but TouchEnd events still need to be processed so
+     * we can call FinishTouchPoint and release it for later use. */
+    if (ev->any.type == ET_TouchEnd)
+        return TRUE;
+    else if (ev->any.type != ET_TouchBegin)
+        return (sprite->spriteTraceGood > 0);
+
+    if (t->mode == XIDirectTouch)
+    {
+        /* Focus immediately under the touchpoint in direct touch mode.
+         * XXX: Do we need to handle crossing screens here? */
+        sprite->spriteTrace[0] =
+            sourcedev->spriteInfo->sprite->hotPhys.pScreen->root;
+        XYToWindow(sprite, ev->device_event.root_x, ev->device_event.root_y);
+    }
+    else if (!TouchBuildDependentSpriteTrace(sourcedev, sprite))
+        return FALSE;
+
+    if (sprite->spriteTraceGood <= 0)
+        return FALSE;
+
+    /* Mark which grabs/event selections we're delivering to: max one grab per
+     * window plus the bottom-most event selection. */
+    ti->listeners = calloc(sprite->spriteTraceGood + 1, sizeof(*ti->listeners));
+    if (!ti->listeners)
+    {
+        sprite->spriteTraceGood = 0;
+        return FALSE;
+    }
+    ti->num_listeners = 0;
+
+    return TRUE;
+}
+
+/**
+ * Copy the touch event into the pointer_event, switching the required
+ * fields to make it a correct pointer event.
+ *
+ * @param event The original touch event
+ * @param[in] motion_event The respective motion event
+ * @param[in] button_event The respective button event (if any)
+ *
+ * @returns The number of converted events.
+ * @retval 0 An error occured
+ * @retval 1 only the motion event is valid
+ * @retval 2 motion and button event are valid
+ */
+int
+TouchConvertToPointerEvent(const InternalEvent *event,
+                           InternalEvent *motion_event,
+                           InternalEvent *button_event)
+{
+    int ptrtype;
+    int nevents = 0;
+
+    BUG_WARN(!event);
+    BUG_WARN(!motion_event);
+
+    switch(event->any.type)
+    {
+        case ET_TouchUpdate:
+            nevents = 1;
+            break;
+        case ET_TouchBegin:
+            nevents = 2; /* motion + press */
+            ptrtype = ET_ButtonPress;
+            break;
+        case ET_TouchEnd:
+            nevents = 2; /* motion + release */
+            ptrtype = ET_ButtonRelease;
+            break;
+        default:
+            BUG_WARN_MSG(1,"Invalid event type %d\n", event->any.type);
+            return 0;
+    }
+
+    BUG_WARN_MSG(!(event->device_event.flags & TOUCH_POINTER_EMULATED),
+                 "Non-emulating touch event\n");
+
+    *motion_event = *event;
+    motion_event->any.type = ET_Motion;
+    motion_event->device_event.detail.button = 0;
+    motion_event->device_event.flags = XIPointerEmulated;
+
+    if (nevents > 1)
+    {
+        BUG_WARN(!button_event);
+        *button_event = *event;
+        button_event->any.type = ptrtype;
+        button_event->device_event.flags = XIPointerEmulated;
+        /* detail is already correct */
+    }
+
+    return nevents;
+}
+
+/**
+ * Return the corresponding pointer emulation internal event type for the given
+ * touch event or 0 if no such event type exists.
+ */
+int
+TouchGetPointerEventType(const InternalEvent *event)
+{
+    int type = 0;
+
+    switch(event->any.type)
+    {
+        case ET_TouchBegin:  type = ET_ButtonPress;   break;
+        case ET_TouchUpdate: type = ET_Motion;        break;
+        case ET_TouchEnd:    type = ET_ButtonRelease; break;
+        default:
+            break;
+    }
+    return type;
+}
+
+
+/**
+ * @returns TRUE if the specified grab or selection is the current owner of
+ * the touch sequence.
+ */
+Bool
+TouchResourceIsOwner(TouchPointInfoPtr ti, XID resource)
+{
+    return (ti->listeners[0].listener == resource);
+}
+
+/**
+ * Add the resource to this touch's listeners.
+ */
+void
+TouchAddListener(TouchPointInfoPtr ti, XID resource, enum InputLevel level,
+                 enum TouchListenerType type, enum TouchListenerState state)
+{
+    ti->listeners[ti->num_listeners].listener = resource;
+    ti->listeners[ti->num_listeners].level = level;
+    ti->listeners[ti->num_listeners].state = state;
+    ti->listeners[ti->num_listeners].type = type;
+    ti->num_listeners++;
+}
+
+/**
+ * Remove the resource from this touch's listeners.
+ *
+ * @return TRUE if the resource was removed, FALSE if the resource was not
+ * in the list
+ */
+Bool
+TouchRemoveListener(TouchPointInfoPtr ti, XID resource)
+{
+    int i;
+    for (i = 0; i < ti->num_listeners; i++)
+    {
+        if (ti->listeners[i].listener == resource)
+        {
+            int j;
+            for (j = i; j< ti->num_listeners - 1; j++)
+                ti->listeners[j] = ti->listeners[j + 1];
+            ti->num_listeners--;
+            ti->listeners[ti->num_listeners].listener = 0;
+            ti->listeners[ti->num_listeners].state = LISTENER_AWAITING_BEGIN;
+            return TRUE;
+        }
+    }
+    return FALSE;
+}
+
+static void
+TouchAddGrabListener(DeviceIntPtr dev, TouchPointInfoPtr ti,
+                     InternalEvent *ev, GrabPtr grab)
+{
+    enum TouchListenerType type = LISTENER_GRAB;
+
+    /* FIXME: owner_events */
+
+    if (grab->grabtype == XI2)
+    {
+        if (!xi2mask_isset(grab->xi2mask, dev, XI_TouchOwnership))
+            TouchEventHistoryAllocate(ti);
+        if (!xi2mask_isset(grab->xi2mask, dev, XI_TouchBegin))
+            type = LISTENER_POINTER_GRAB;
+    } else if (grab->grabtype == XI || grab->grabtype == CORE)
+    {
+        TouchEventHistoryAllocate(ti);
+        type = LISTENER_POINTER_GRAB;
+    }
+
+    TouchAddListener(ti, grab->resource, grab->grabtype,
+                     type, LISTENER_AWAITING_BEGIN);
+    ti->num_grabs++;
+}
+
+/**
+ * Add one listener if there is a grab on the given window.
+ */
+static void
+TouchAddPassiveGrabListener(DeviceIntPtr dev, TouchPointInfoPtr ti,
+                            WindowPtr win, InternalEvent *ev)
+{
+    GrabPtr grab;
+    Bool check_core = IsMaster(dev) && ti->emulate_pointer;
+
+    /* FIXME: make CheckPassiveGrabsOnWindow only trigger on TouchBegin */
+    grab = CheckPassiveGrabsOnWindow(win, dev, ev, check_core, FALSE);
+    if (!grab)
+        return;
+
+    TouchAddGrabListener(dev, ti, ev, grab);
+}
+
+static Bool
+TouchAddRegularListener(DeviceIntPtr dev, TouchPointInfoPtr ti,
+                        WindowPtr win, InternalEvent *ev)
+{
+    InputClients *iclients = NULL;
+    OtherInputMasks *inputMasks = NULL;
+    uint16_t evtype = 0; /* may be event type or emulated event type */
+    enum TouchListenerType type = LISTENER_REGULAR;
+    int mask;
+
+    evtype = GetXI2Type(ev->any.type);
+    mask = EventIsDeliverable(dev, ev->any.type, win);
+    if (!mask && !ti->emulate_pointer)
+        return FALSE;
+    else if (!mask)/* now try for pointer event */
+    {
+        mask = EventIsDeliverable(dev, TouchGetPointerEventType(ev), win);
+        if (mask)
+        {
+            evtype = GetXI2Type(TouchGetPointerEventType(ev));
+            type = LISTENER_POINTER_REGULAR;
+        }
+    }
+    if (!mask)
+        return FALSE;
+
+    inputMasks = wOtherInputMasks(win);
+
+    if (mask & EVENT_XI2_MASK)
+    {
+        nt_list_for_each_entry(iclients, inputMasks->inputClients, next)
+        {
+            if (!xi2mask_isset(iclients->xi2mask, dev, evtype))
+                continue;
+
+            if (!xi2mask_isset(iclients->xi2mask, dev, XI_TouchOwnership))
+                TouchEventHistoryAllocate(ti);
+
+            TouchAddListener(ti, iclients->resource, XI2,
+                             type, LISTENER_AWAITING_BEGIN);
+            return TRUE;
+        }
+    }
+
+    if (mask & EVENT_XI1_MASK)
+    {
+        int xitype = GetXIType(TouchGetPointerEventType(ev));
+        Mask xi_filter = event_get_filter_from_type(dev, xitype);
+        nt_list_for_each_entry(iclients, inputMasks->inputClients, next)
+        {
+            if (!(iclients->mask[dev->id] & xi_filter))
+                continue;
+
+            TouchEventHistoryAllocate(ti);
+            TouchAddListener(ti, iclients->resource, XI,
+                             LISTENER_POINTER_REGULAR, LISTENER_AWAITING_BEGIN);
+            return TRUE;
+        }
+    }
+
+    if (mask & EVENT_CORE_MASK)
+    {
+        int coretype = GetCoreType(TouchGetPointerEventType(ev));
+        Mask core_filter = event_get_filter_from_type(dev, coretype);
+
+        /* window owner */
+        if (IsMaster(dev) && (win->eventMask & core_filter))
+        {
+            TouchEventHistoryAllocate(ti);
+            TouchAddListener(ti, win->drawable.id, CORE,
+                             LISTENER_POINTER_REGULAR, LISTENER_AWAITING_BEGIN);
+            return TRUE;
+        }
+
+        /* all others */
+        nt_list_for_each_entry(iclients, (InputClients*)wOtherClients(win), next)
+        {
+            if (!(iclients->mask[XIAllDevices] & core_filter))
+                continue;
+
+            TouchEventHistoryAllocate(ti);
+            TouchAddListener(ti, iclients->resource, CORE,
+                             type, LISTENER_AWAITING_BEGIN);
+            return TRUE;
+        }
+    }
+
+    return FALSE;
+}
+
+static void
+TouchAddActiveGrabListener(DeviceIntPtr dev, TouchPointInfoPtr ti,
+                           InternalEvent *ev, GrabPtr grab)
+{
+    if (!ti->emulate_pointer &&
+        (grab->grabtype == CORE || grab->grabtype == XI))
+        return;
+
+    if (!ti->emulate_pointer &&
+        grab->grabtype == XI2 &&
+        (grab->type != XI_TouchBegin && grab->type != XI_TouchEnd && grab->type != XI_TouchUpdate))
+        return;
+
+    TouchAddGrabListener(dev, ti, ev, grab);
+}
+
+void
+TouchSetupListeners(DeviceIntPtr dev, TouchPointInfoPtr ti, InternalEvent *ev)
+{
+    int i;
+    SpritePtr sprite = &ti->sprite;
+    WindowPtr win;
+
+    if (dev->deviceGrab.grab)
+        TouchAddActiveGrabListener(dev, ti, ev, dev->deviceGrab.grab);
+
+    /* First, find all grabbing clients from the root window down
+     * to the deepest child window. */
+    for (i = 0; i < sprite->spriteTraceGood; i++)
+    {
+        win = sprite->spriteTrace[i];
+        TouchAddPassiveGrabListener(dev, ti, win, ev);
+    }
+
+    /* Find the first client with an applicable event selection,
+     * going from deepest child window back up to the root window. */
+    for (i = sprite->spriteTraceGood - 1; i >= 0; i--)
+    {
+        Bool delivered;
+
+        win = sprite->spriteTrace[i];
+        delivered = TouchAddRegularListener(dev, ti, win, ev);
+        if (delivered)
+            return;
+    }
+}
+
+/**
+ * Remove the touch pointer grab from the device. Called from AllowSome()
+ */
+void
+TouchRemovePointerGrab(DeviceIntPtr dev)
+{
+    TouchPointInfoPtr ti;
+    GrabPtr grab;
+    DeviceEvent *ev;
+
+    if (!dev->touch)
+        return;
+
+    grab = dev->deviceGrab.grab;
+    if (!grab)
+        return;
+
+    ev = dev->deviceGrab.sync.event;
+    if (!IsTouchEvent((InternalEvent*)ev))
+        return;
+
+    ti = TouchFindByClientID(dev, ev->touchid);
+    if (!ti)
+        return;
+}
+
+/* As touch grabs don't turn into active grabs with their own resources, we
+ * need to walk all the touches and remove this grab from any delivery
+ * lists. */
+void
+TouchListenerGone(XID resource)
+{
+    TouchPointInfoPtr ti;
+    DeviceIntPtr dev;
+    InternalEvent *events = InitEventList(GetMaximumEventsNum());
+    int i, j, k, nev;
+
+    if (!events)
+        FatalError("TouchListenerGone: couldn't allocate events\n");
+
+    for (dev = inputInfo.devices; dev; dev = dev->next)
+    {
+        if (!dev->touch)
+            continue;
+
+        for (i = 0; i < dev->touch->num_touches; i++)
+        {
+            ti = &dev->touch->touches[i];
+            if (!ti->active)
+                continue;
+
+            for (j = 0; j < ti->num_listeners; j++)
+            {
+                if (ti->listeners[j].listener != resource)
+                    continue;
+
+                nev = GetTouchOwnershipEvents(events, dev, ti, XIRejectTouch,
+                                              resource, 0);
+                for (k = 0; k < nev; k++)
+                    mieqProcessDeviceEvent(dev, events + k, NULL);
+
+                break;
+            }
+        }
+    }
+
+    FreeEventList(events, GetMaximumEventsNum());
+}