xwayland-input.c 87.3 KB
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/*
 * Copyright © 2014 Intel Corporation
 * Copyright © 2008 Kristian Høgsberg
 *
 * 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, and that the name of the
 * copyright holders not be used in advertising or publicity
 * pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied
 * warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

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#include <xwayland-config.h>
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#include <linux/input.h>
#include <sys/mman.h>
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#include <inputstr.h>
#include <exevents.h>
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#include <xkbsrv.h>
#include <xserver-properties.h>
#include <inpututils.h>
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#include <mi.h>
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#include <mipointer.h>
#include <mipointrst.h>
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#include <misc.h>
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#include "xwayland-cursor.h"
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#include "xwayland-input.h"
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#include "xwayland-window.h"
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#include "xwayland-screen.h"
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#include "pointer-constraints-unstable-v1-client-protocol.h"
#include "relative-pointer-unstable-v1-client-protocol.h"
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#include "tablet-unstable-v2-client-protocol.h"
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#include "xwayland-keyboard-grab-unstable-v1-client-protocol.h"
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struct axis_discrete_pending {
    struct xorg_list l;
    uint32_t axis;
    int32_t discrete;
};

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struct sync_pending {
    struct xorg_list l;
    DeviceIntPtr pending_dev;
};

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static DevPrivateKeyRec xwl_tablet_private_key;

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static void
xwl_pointer_warp_emulator_handle_motion(struct xwl_pointer_warp_emulator *warp_emulator,
                                        double dx,
                                        double dy,
                                        double dx_unaccel,
                                        double dy_unaccel);
static void
xwl_pointer_warp_emulator_maybe_lock(struct xwl_pointer_warp_emulator *warp_emulator,
                                     struct xwl_window *xwl_window,
                                     SpritePtr sprite,
                                     int x, int y);

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static Bool
xwl_seat_maybe_lock_on_hidden_cursor(struct xwl_seat *xwl_seat);

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static void
xwl_seat_destroy_confined_pointer(struct xwl_seat *xwl_seat);

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static void
init_tablet_manager_seat(struct xwl_screen *xwl_screen,
                         struct xwl_seat *xwl_seat);
static void
release_tablet_manager_seat(struct xwl_seat *xwl_seat);

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static void
xwl_pointer_control(DeviceIntPtr device, PtrCtrl *ctrl)
{
    /* Nothing to do, dix handles all settings */
}

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static Bool
init_pointer_buttons(DeviceIntPtr device)
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{
#define NBUTTONS 10
    BYTE map[NBUTTONS + 1];
    int i = 0;
    Atom btn_labels[NBUTTONS] = { 0 };
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    for (i = 1; i <= NBUTTONS; i++)
        map[i] = i;

    btn_labels[0] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_LEFT);
    btn_labels[1] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_MIDDLE);
    btn_labels[2] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_RIGHT);
    btn_labels[3] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_WHEEL_UP);
    btn_labels[4] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_WHEEL_DOWN);
    btn_labels[5] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_HWHEEL_LEFT);
    btn_labels[6] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_HWHEEL_RIGHT);
    /* don't know about the rest */

    if (!InitButtonClassDeviceStruct(device, NBUTTONS, btn_labels, map))
        return FALSE;

    return TRUE;
}

static int
xwl_pointer_proc(DeviceIntPtr device, int what)
{
#define NAXES 4
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    Atom axes_labels[NAXES] = { 0 };

    switch (what) {
    case DEVICE_INIT:
        device->public.on = FALSE;

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        if (!init_pointer_buttons(device))
            return BadValue;
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        axes_labels[0] = XIGetKnownProperty(AXIS_LABEL_PROP_ABS_X);
        axes_labels[1] = XIGetKnownProperty(AXIS_LABEL_PROP_ABS_Y);
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        axes_labels[2] = XIGetKnownProperty(AXIS_LABEL_PROP_REL_HWHEEL);
        axes_labels[3] = XIGetKnownProperty(AXIS_LABEL_PROP_REL_WHEEL);
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        if (!InitValuatorClassDeviceStruct(device, NAXES, axes_labels,
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                                           GetMotionHistorySize(), Absolute))
            return BadValue;

        /* Valuators */
        InitValuatorAxisStruct(device, 0, axes_labels[0],
                               0, 0xFFFF, 10000, 0, 10000, Absolute);
        InitValuatorAxisStruct(device, 1, axes_labels[1],
                               0, 0xFFFF, 10000, 0, 10000, Absolute);
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        InitValuatorAxisStruct(device, 2, axes_labels[2],
                               NO_AXIS_LIMITS, NO_AXIS_LIMITS, 0, 0, 0, Relative);
        InitValuatorAxisStruct(device, 3, axes_labels[3],
                               NO_AXIS_LIMITS, NO_AXIS_LIMITS, 0, 0, 0, Relative);

        SetScrollValuator(device, 2, SCROLL_TYPE_HORIZONTAL, 1.0, SCROLL_FLAG_NONE);
        SetScrollValuator(device, 3, SCROLL_TYPE_VERTICAL, 1.0, SCROLL_FLAG_PREFERRED);
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        if (!InitPtrFeedbackClassDeviceStruct(device, xwl_pointer_control))
            return BadValue;

        return Success;

    case DEVICE_ON:
        device->public.on = TRUE;
        return Success;

    case DEVICE_OFF:
    case DEVICE_CLOSE:
        device->public.on = FALSE;
        return Success;
    }

    return BadMatch;

#undef NBUTTONS
#undef NAXES
}

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static int
xwl_pointer_proc_relative(DeviceIntPtr device, int what)
{
#define NAXES 2
    Atom axes_labels[NAXES] = { 0 };

    switch (what) {
    case DEVICE_INIT:
        device->public.on = FALSE;

        axes_labels[0] = XIGetKnownProperty(AXIS_LABEL_PROP_REL_X);
        axes_labels[1] = XIGetKnownProperty(AXIS_LABEL_PROP_REL_Y);

        /*
         * We'll never send buttons, but XGetPointerMapping might in certain
         * situations make the client think we have no buttons.
         */
        if (!init_pointer_buttons(device))
            return BadValue;

        if (!InitValuatorClassDeviceStruct(device, NAXES, axes_labels,
                                           GetMotionHistorySize(), Relative))
            return BadValue;

        /* Valuators */
        InitValuatorAxisStruct(device, 0, axes_labels[0],
                               NO_AXIS_LIMITS, NO_AXIS_LIMITS, 1, 0, 1, Relative);
        InitValuatorAxisStruct(device, 1, axes_labels[1],
                               NO_AXIS_LIMITS, NO_AXIS_LIMITS, 1, 0, 1, Relative);

        if (!InitPtrFeedbackClassDeviceStruct(device, xwl_pointer_control))
            return BadValue;

        return Success;

    case DEVICE_ON:
        device->public.on = TRUE;
        return Success;

    case DEVICE_OFF:
    case DEVICE_CLOSE:
        device->public.on = FALSE;
        return Success;
    }

    return BadMatch;

#undef NAXES
}

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static void
xwl_keyboard_control(DeviceIntPtr device, KeybdCtrl *ctrl)
{
}

static int
xwl_keyboard_proc(DeviceIntPtr device, int what)
{
    struct xwl_seat *xwl_seat = device->public.devicePrivate;
    int len;

    switch (what) {
    case DEVICE_INIT:
        device->public.on = FALSE;
        if (xwl_seat->keymap)
            len = strnlen(xwl_seat->keymap, xwl_seat->keymap_size);
        else
            len = 0;
        if (!InitKeyboardDeviceStructFromString(device, xwl_seat->keymap,
                                                len,
                                                NULL, xwl_keyboard_control))
            return BadValue;

        return Success;
    case DEVICE_ON:
        device->public.on = TRUE;
        return Success;

    case DEVICE_OFF:
    case DEVICE_CLOSE:
        device->public.on = FALSE;
        return Success;
    }

    return BadMatch;
}

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static int
xwl_touch_proc(DeviceIntPtr device, int what)
{
#define NTOUCHPOINTS 20
#define NBUTTONS 1
#define NAXES 2
    Atom btn_labels[NBUTTONS] = { 0 };
    Atom axes_labels[NAXES] = { 0 };
    BYTE map[NBUTTONS + 1] = { 0 };

    switch (what) {
    case DEVICE_INIT:
        device->public.on = FALSE;

        axes_labels[0] = XIGetKnownProperty(AXIS_LABEL_PROP_ABS_MT_POSITION_X);
        axes_labels[1] = XIGetKnownProperty(AXIS_LABEL_PROP_ABS_MT_POSITION_Y);

        if (!InitValuatorClassDeviceStruct(device, NAXES, axes_labels,
                                           GetMotionHistorySize(), Absolute))
            return BadValue;

        if (!InitButtonClassDeviceStruct(device, NBUTTONS, btn_labels, map))
            return BadValue;

        if (!InitTouchClassDeviceStruct(device, NTOUCHPOINTS,
                                        XIDirectTouch, NAXES))
            return BadValue;

        /* Valuators */
        InitValuatorAxisStruct(device, 0, axes_labels[0],
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                               0, 0xFFFF, 10000, 0, 10000, Absolute);
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        InitValuatorAxisStruct(device, 1, axes_labels[1],
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                               0, 0xFFFF, 10000, 0, 10000, Absolute);
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        return Success;

    case DEVICE_ON:
        device->public.on = TRUE;
        return Success;

    case DEVICE_OFF:
    case DEVICE_CLOSE:
        device->public.on = FALSE;
        return Success;
    }

    return BadMatch;
#undef NAXES
#undef NBUTTONS
#undef NTOUCHPOINTS
}

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static int
xwl_tablet_proc(DeviceIntPtr device, int what)
{
#define NBUTTONS 9
#define NAXES 6
    Atom btn_labels[NBUTTONS] = { 0 };
    Atom axes_labels[NAXES] = { 0 };
    BYTE map[NBUTTONS + 1] = { 0 };
    int i;

    switch (what) {
    case DEVICE_INIT:
        device->public.on = FALSE;

        for (i = 1; i <= NBUTTONS; i++)
            map[i] = i;

        axes_labels[0] = XIGetKnownProperty(AXIS_LABEL_PROP_ABS_X);
        axes_labels[1] = XIGetKnownProperty(AXIS_LABEL_PROP_ABS_Y);
        axes_labels[2] = XIGetKnownProperty(AXIS_LABEL_PROP_ABS_PRESSURE);
        axes_labels[3] = XIGetKnownProperty(AXIS_LABEL_PROP_ABS_TILT_X);
        axes_labels[4] = XIGetKnownProperty(AXIS_LABEL_PROP_ABS_TILT_Y);
        axes_labels[5] = XIGetKnownProperty(AXIS_LABEL_PROP_ABS_WHEEL);

        if (!InitValuatorClassDeviceStruct(device, NAXES, axes_labels,
                                           GetMotionHistorySize(), Absolute))
            return BadValue;

        /* Valuators - match the xf86-input-wacom ranges */
        InitValuatorAxisStruct(device, 0, axes_labels[0],
                               0, 262143, 10000, 0, 10000, Absolute);
        InitValuatorAxisStruct(device, 1, axes_labels[1],
                               0, 262143, 10000, 0, 10000, Absolute);
        /* pressure */
        InitValuatorAxisStruct(device, 2, axes_labels[2],
                               0, 65535, 1, 0, 1, Absolute);
        /* tilt x */
        InitValuatorAxisStruct(device, 3, axes_labels[3],
                               -64, 63, 57, 0, 57, Absolute);
        /* tilt y */
        InitValuatorAxisStruct(device, 4, axes_labels[4],
                               -64, 63, 57, 0, 57, Absolute);
        /* abs wheel (airbrush) or rotation (artpen) */
        InitValuatorAxisStruct(device, 5, axes_labels[5],
                               -900, 899, 1, 0, 1, Absolute);

        if (!InitPtrFeedbackClassDeviceStruct(device, xwl_pointer_control))
            return BadValue;

        if (!InitButtonClassDeviceStruct(device, NBUTTONS, btn_labels, map))
            return BadValue;

        return Success;

    case DEVICE_ON:
        device->public.on = TRUE;
        return Success;

    case DEVICE_OFF:
    case DEVICE_CLOSE:
        device->public.on = FALSE;
        return Success;
    }

    return BadMatch;
#undef NAXES
#undef NBUTTONS
}

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static void
pointer_handle_enter(void *data, struct wl_pointer *pointer,
                     uint32_t serial, struct wl_surface *surface,
                     wl_fixed_t sx_w, wl_fixed_t sy_w)
{
    struct xwl_seat *xwl_seat = data;
    DeviceIntPtr dev = xwl_seat->pointer;
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    DeviceIntPtr master;
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    int i;
    int sx = wl_fixed_to_int(sx_w);
    int sy = wl_fixed_to_int(sy_w);
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    int dx, dy;
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    ScreenPtr pScreen = xwl_seat->xwl_screen->screen;
    ValuatorMask mask;

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    /* There's a race here where if we create and then immediately
     * destroy a surface, we might end up in a state where the Wayland
     * compositor sends us an event for a surface that doesn't exist.
     *
     * Don't process enter events in this case.
     */
    if (surface == NULL)
        return;

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    xwl_seat->xwl_screen->serial = serial;
    xwl_seat->pointer_enter_serial = serial;

    xwl_seat->focus_window = wl_surface_get_user_data(surface);
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    dx = xwl_seat->focus_window->window->drawable.x;
    dy = xwl_seat->focus_window->window->drawable.y;
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    /* We just entered a new xwindow, forget about the old last xwindow */
    xwl_seat->last_xwindow = NullWindow;

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    master = GetMaster(dev, POINTER_OR_FLOAT);
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    (*pScreen->SetCursorPosition) (dev, pScreen, dx + sx, dy + sy, TRUE);
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    miPointerInvalidateSprite(master);
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    CheckMotion(NULL, master);
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    /* Ideally, X clients shouldn't see these button releases.  When
     * the pointer leaves a window with buttons down, it means that
     * the wayland compositor has grabbed the pointer.  The button
     * release event is consumed by whatever grab in the compositor
     * and won't be sent to clients (the X server is a client).
     * However, we need to reset X's idea of which buttons are up and
     * down, and they're all up (by definition) when the pointer
     * enters a window.  We should figure out a way to swallow these
     * events, perhaps using an X grab whenever the pointer is not in
     * any X window, but for now just send the events. */
    valuator_mask_zero(&mask);
    for (i = 0; i < dev->button->numButtons; i++)
        if (BitIsOn(dev->button->down, i))
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            QueuePointerEvents(dev, ButtonRelease, i, 0, &mask);
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    /* The last cursor frame we committed before the pointer left one
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     * of our surfaces might not have been shown. In that case we'll
     * have a cursor surface frame callback pending which we need to
     * clear so that we can continue submitting new cursor frames. */
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    if (xwl_seat->cursor.frame_cb) {
        wl_callback_destroy(xwl_seat->cursor.frame_cb);
        xwl_seat->cursor.frame_cb = NULL;
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        xwl_seat_set_cursor(xwl_seat);
    }
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    if (xwl_seat->pointer_warp_emulator) {
        xwl_pointer_warp_emulator_maybe_lock(xwl_seat->pointer_warp_emulator,
                                             xwl_seat->focus_window,
                                             NULL, 0, 0);
    }
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    else {
        xwl_seat_maybe_lock_on_hidden_cursor(xwl_seat);
    }
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}

static void
pointer_handle_leave(void *data, struct wl_pointer *pointer,
                     uint32_t serial, struct wl_surface *surface)
{
    struct xwl_seat *xwl_seat = data;
    DeviceIntPtr dev = xwl_seat->pointer;

    xwl_seat->xwl_screen->serial = serial;

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    /* The pointer has left a known xwindow, save it for a possible match
     * in sprite_check_lost_focus()
     */
    if (xwl_seat->focus_window) {
        xwl_seat->last_xwindow = xwl_seat->focus_window->window;
        xwl_seat->focus_window = NULL;
        CheckMotion(NULL, GetMaster(dev, POINTER_OR_FLOAT));
    }
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}

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static void
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dispatch_pointer_motion_event(struct xwl_seat *xwl_seat)
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{
    ValuatorMask mask;

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    if (xwl_seat->pointer_warp_emulator &&
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        xwl_seat->pending_pointer_event.has_relative) {
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        double dx;
        double dy;
        double dx_unaccel;
        double dy_unaccel;

        dx = xwl_seat->pending_pointer_event.dx;
        dy = xwl_seat->pending_pointer_event.dy;
        dx_unaccel = xwl_seat->pending_pointer_event.dx_unaccel;
        dy_unaccel = xwl_seat->pending_pointer_event.dy_unaccel;
        xwl_pointer_warp_emulator_handle_motion(xwl_seat->pointer_warp_emulator,
                                                dx, dy,
                                                dx_unaccel, dy_unaccel);
    } else if (xwl_seat->pending_pointer_event.has_absolute ||
               xwl_seat->pending_pointer_event.has_relative) {
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        int x;
        int y;

        if (xwl_seat->pending_pointer_event.has_absolute) {
            int sx = wl_fixed_to_int(xwl_seat->pending_pointer_event.x);
            int sy = wl_fixed_to_int(xwl_seat->pending_pointer_event.y);
            int dx = xwl_seat->focus_window->window->drawable.x;
            int dy = xwl_seat->focus_window->window->drawable.y;

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            if (xwl_window_has_viewport_enabled(xwl_seat->focus_window)) {
                sx *= xwl_seat->focus_window->scale_x;
                sy *= xwl_seat->focus_window->scale_y;
            }

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            x = dx + sx;
            y = dy + sy;
        } else {
            miPointerGetPosition(xwl_seat->pointer, &x, &y);
        }
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        valuator_mask_zero(&mask);
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        if (xwl_seat->pending_pointer_event.has_relative) {
            double dx_unaccel;
            double dy_unaccel;

            dx_unaccel = xwl_seat->pending_pointer_event.dx_unaccel;
            dy_unaccel = xwl_seat->pending_pointer_event.dy_unaccel;
            valuator_mask_set_absolute_unaccelerated(&mask, 0, x, dx_unaccel);
            valuator_mask_set_absolute_unaccelerated(&mask, 1, y, dy_unaccel);
        } else {
            valuator_mask_set(&mask, 0, x);
            valuator_mask_set(&mask, 1, y);
        }
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        QueuePointerEvents(xwl_seat->pointer, MotionNotify, 0,
                           POINTER_ABSOLUTE | POINTER_SCREEN, &mask);
    }

    xwl_seat->pending_pointer_event.has_absolute = FALSE;
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    xwl_seat->pending_pointer_event.has_relative = FALSE;
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}

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static void
pointer_handle_motion(void *data, struct wl_pointer *pointer,
                      uint32_t time, wl_fixed_t sx_w, wl_fixed_t sy_w)
{
    struct xwl_seat *xwl_seat = data;

    if (!xwl_seat->focus_window)
        return;

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    xwl_seat->pending_pointer_event.has_absolute = TRUE;
    xwl_seat->pending_pointer_event.x = sx_w;
    xwl_seat->pending_pointer_event.y = sy_w;
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    if (wl_proxy_get_version((struct wl_proxy *) xwl_seat->wl_pointer) < 5)
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        dispatch_pointer_motion_event(xwl_seat);
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}

static void
pointer_handle_button(void *data, struct wl_pointer *pointer, uint32_t serial,
                      uint32_t time, uint32_t button, uint32_t state)
{
    struct xwl_seat *xwl_seat = data;
    int index;
    ValuatorMask mask;

    xwl_seat->xwl_screen->serial = serial;

    switch (button) {
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    case BTN_LEFT:
        index = 1;
        break;
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    case BTN_MIDDLE:
        index = 2;
        break;
    case BTN_RIGHT:
        index = 3;
        break;
    default:
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        /* Skip indexes 4-7: they are used for vertical and horizontal scroll.
           The rest of the buttons go in order: BTN_SIDE becomes 8, etc. */
        index = 8 + button - BTN_SIDE;
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        break;
    }

    valuator_mask_zero(&mask);
    QueuePointerEvents(xwl_seat->pointer,
                       state ? ButtonPress : ButtonRelease, index, 0, &mask);
}

static void
pointer_handle_axis(void *data, struct wl_pointer *pointer,
                    uint32_t time, uint32_t axis, wl_fixed_t value)
{
    struct xwl_seat *xwl_seat = data;
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    int index;
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    const int divisor = 10;
    ValuatorMask mask;
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    struct axis_discrete_pending *pending = NULL;
    struct axis_discrete_pending *iter;
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    switch (axis) {
    case WL_POINTER_AXIS_VERTICAL_SCROLL:
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        index = 3;
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        break;
    case WL_POINTER_AXIS_HORIZONTAL_SCROLL:
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        index = 2;
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        break;
    default:
        return;
    }

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    xorg_list_for_each_entry(iter, &xwl_seat->axis_discrete_pending, l) {
        if (iter->axis == axis) {
            pending = iter;
            break;
        }
    }

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    valuator_mask_zero(&mask);
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    if (pending) {
        valuator_mask_set(&mask, index, pending->discrete);
        xorg_list_del(&pending->l);
        free(pending);
    } else {
        valuator_mask_set_double(&mask, index, wl_fixed_to_double(value) / divisor);
    }
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    QueuePointerEvents(xwl_seat->pointer, MotionNotify, 0, POINTER_RELATIVE, &mask);
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}

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static void
pointer_handle_frame(void *data, struct wl_pointer *wl_pointer)
{
    struct xwl_seat *xwl_seat = data;

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    if (!xwl_seat->focus_window)
        return;

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    dispatch_pointer_motion_event(xwl_seat);
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}

static void
pointer_handle_axis_source(void *data, struct wl_pointer *wl_pointer, uint32_t axis_source)
{
}

static void
pointer_handle_axis_stop(void *data, struct wl_pointer *wl_pointer,
                         uint32_t time, uint32_t axis)
{
}

static void
pointer_handle_axis_discrete(void *data, struct wl_pointer *wl_pointer,
                             uint32_t axis, int32_t discrete)
{
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    struct xwl_seat *xwl_seat = data;

    struct axis_discrete_pending *pending = malloc(sizeof *pending);
    if (!pending)
        return;

    pending->axis = axis;
    pending->discrete = discrete;

    xorg_list_add(&pending->l, &xwl_seat->axis_discrete_pending);
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}

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static const struct wl_pointer_listener pointer_listener = {
    pointer_handle_enter,
    pointer_handle_leave,
    pointer_handle_motion,
    pointer_handle_button,
    pointer_handle_axis,
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    pointer_handle_frame,
    pointer_handle_axis_source,
    pointer_handle_axis_stop,
    pointer_handle_axis_discrete,
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};

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static void
relative_pointer_handle_relative_motion(void *data,
                                        struct zwp_relative_pointer_v1 *zwp_relative_pointer_v1,
                                        uint32_t utime_hi,
                                        uint32_t utime_lo,
                                        wl_fixed_t dxf,
                                        wl_fixed_t dyf,
                                        wl_fixed_t dx_unaccelf,
                                        wl_fixed_t dy_unaccelf)
{
    struct xwl_seat *xwl_seat = data;

    xwl_seat->pending_pointer_event.has_relative = TRUE;
    xwl_seat->pending_pointer_event.dx = wl_fixed_to_double(dxf);
    xwl_seat->pending_pointer_event.dy = wl_fixed_to_double(dyf);
    xwl_seat->pending_pointer_event.dx_unaccel = wl_fixed_to_double(dx_unaccelf);
    xwl_seat->pending_pointer_event.dy_unaccel = wl_fixed_to_double(dy_unaccelf);

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    if (!xwl_seat->focus_window)
        return;

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    if (wl_proxy_get_version((struct wl_proxy *) xwl_seat->wl_pointer) < 5)
        dispatch_pointer_motion_event(xwl_seat);
}

static const struct zwp_relative_pointer_v1_listener relative_pointer_listener = {
    relative_pointer_handle_relative_motion,
};

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static void
keyboard_handle_key(void *data, struct wl_keyboard *keyboard, uint32_t serial,
                    uint32_t time, uint32_t key, uint32_t state)
{
    struct xwl_seat *xwl_seat = data;
    uint32_t *k, *end;

    xwl_seat->xwl_screen->serial = serial;

    end = (uint32_t *) ((char *) xwl_seat->keys.data + xwl_seat->keys.size);
    for (k = xwl_seat->keys.data; k < end; k++) {
        if (*k == key)
            *k = *--end;
    }
    xwl_seat->keys.size = (char *) end - (char *) xwl_seat->keys.data;
    if (state) {
        k = wl_array_add(&xwl_seat->keys, sizeof *k);
        *k = key;
    }

    QueueKeyboardEvents(xwl_seat->keyboard,
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                        state ? KeyPress : KeyRelease, key + 8);
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}

static void
keyboard_handle_keymap(void *data, struct wl_keyboard *keyboard,
                       uint32_t format, int fd, uint32_t size)
{
    struct xwl_seat *xwl_seat = data;
    DeviceIntPtr master;
    XkbDescPtr xkb;
    XkbChangesRec changes = { 0 };

    if (xwl_seat->keymap)
        munmap(xwl_seat->keymap, xwl_seat->keymap_size);

    xwl_seat->keymap_size = size;
    xwl_seat->keymap = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
    if (xwl_seat->keymap == MAP_FAILED) {
        xwl_seat->keymap_size = 0;
        xwl_seat->keymap = NULL;
        goto out;
    }

    xkb = XkbCompileKeymapFromString(xwl_seat->keyboard, xwl_seat->keymap,
                                     strnlen(xwl_seat->keymap,
                                             xwl_seat->keymap_size));
    if (!xkb)
        goto out;

    XkbUpdateDescActions(xkb, xkb->min_key_code, XkbNumKeys(xkb), &changes);

    if (xwl_seat->keyboard->key)
        /* Keep the current controls */
        XkbCopyControls(xkb, xwl_seat->keyboard->key->xkbInfo->desc);

    XkbDeviceApplyKeymap(xwl_seat->keyboard, xkb);

    master = GetMaster(xwl_seat->keyboard, MASTER_KEYBOARD);
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    if (master)
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        XkbDeviceApplyKeymap(master, xkb);

    XkbFreeKeyboard(xkb, XkbAllComponentsMask, TRUE);

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    close(fd);
}

static void
keyboard_handle_enter(void *data, struct wl_keyboard *keyboard,
                      uint32_t serial,
                      struct wl_surface *surface, struct wl_array *keys)
{
    struct xwl_seat *xwl_seat = data;
    uint32_t *k;

    xwl_seat->xwl_screen->serial = serial;
    xwl_seat->keyboard_focus = surface;

    wl_array_copy(&xwl_seat->keys, keys);
    wl_array_for_each(k, &xwl_seat->keys)
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        QueueKeyboardEvents(xwl_seat->keyboard, EnterNotify, *k + 8);
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}

static void
keyboard_handle_leave(void *data, struct wl_keyboard *keyboard,
                      uint32_t serial, struct wl_surface *surface)
{
    struct xwl_seat *xwl_seat = data;
    uint32_t *k;

    xwl_seat->xwl_screen->serial = serial;

    wl_array_for_each(k, &xwl_seat->keys)
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        QueueKeyboardEvents(xwl_seat->keyboard, LeaveNotify, *k + 8);
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    xwl_seat->keyboard_focus = NULL;
}

static void
keyboard_handle_modifiers(void *data, struct wl_keyboard *keyboard,
                          uint32_t serial, uint32_t mods_depressed,
                          uint32_t mods_latched, uint32_t mods_locked,
                          uint32_t group)
{
    struct xwl_seat *xwl_seat = data;
    DeviceIntPtr dev;
    XkbStateRec old_state, *new_state;
    xkbStateNotify sn;
    CARD16 changed;

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    mieqProcessInputEvents();

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    for (dev = inputInfo.devices; dev; dev = dev->next) {
        if (dev != xwl_seat->keyboard &&
            dev != GetMaster(xwl_seat->keyboard, MASTER_KEYBOARD))
            continue;

        old_state = dev->key->xkbInfo->state;
        new_state = &dev->key->xkbInfo->state;

        new_state->locked_group = group & XkbAllGroupsMask;
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        new_state->base_mods = mods_depressed & XkbAllModifiersMask;
        new_state->locked_mods = mods_locked & XkbAllModifiersMask;
        XkbLatchModifiers(dev, XkbAllModifiersMask,
                          mods_latched & XkbAllModifiersMask);
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        XkbComputeDerivedState(dev->key->xkbInfo);

        changed = XkbStateChangedFlags(&old_state, new_state);
        if (!changed)
            continue;

        sn.keycode = 0;
        sn.eventType = 0;
        sn.requestMajor = XkbReqCode;
        sn.requestMinor = X_kbLatchLockState;   /* close enough */
        sn.changed = changed;
        XkbSendStateNotify(dev, &sn);
    }
}

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static void
remove_sync_pending(DeviceIntPtr dev)
{
    struct xwl_seat *xwl_seat = dev->public.devicePrivate;
    struct sync_pending *p, *npd;

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    if (!xwl_seat)
        return;

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    xorg_list_for_each_entry_safe(p, npd, &xwl_seat->sync_pending, l) {
        if (p->pending_dev == dev) {
            xorg_list_del(&xwl_seat->sync_pending);
            free (p);
            return;
        }
    }
}

static void
sync_callback(void *data, struct wl_callback *callback, uint32_t serial)
{
    DeviceIntPtr dev = (DeviceIntPtr) data;

    remove_sync_pending(dev);
    wl_callback_destroy(callback);
}

static const struct wl_callback_listener sync_listener = {
   sync_callback
};

static Bool
keyboard_check_repeat (DeviceIntPtr dev, XkbSrvInfoPtr xkbi, unsigned key)
{
    struct xwl_seat *xwl_seat = dev->public.devicePrivate;
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    struct xwl_screen *xwl_screen;
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    struct wl_callback *callback;
    struct sync_pending *p;

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    if (!xwl_seat)
        return FALSE;

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    /* Make sure we didn't miss a possible reply from the compositor */
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    xwl_screen = xwl_seat->xwl_screen;
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    xwl_sync_events (xwl_screen);

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    xorg_list_for_each_entry(p, &xwl_seat->sync_pending, l) {
        if (p->pending_dev == dev) {
            ErrorF("Key repeat discarded, Wayland compositor doesn't "
                   "seem to be processing events fast enough!\n");

            return FALSE;
        }
    }

    p = xnfalloc(sizeof(struct sync_pending));
    p->pending_dev = dev;
    callback = wl_display_sync (xwl_screen->display);
    xorg_list_add(&p->l, &xwl_seat->sync_pending);

    wl_callback_add_listener(callback, &sync_listener, dev);

    return TRUE;
}

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static void
keyboard_handle_repeat_info (void *data, struct wl_keyboard *keyboard,
                             int32_t rate, int32_t delay)
{
    struct xwl_seat *xwl_seat = data;
    DeviceIntPtr dev;
    XkbControlsPtr ctrl;

    if (rate < 0 || delay < 0) {
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        ErrorF("Wrong rate/delay: %d, %d\n", rate, delay);
        return;
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    }

    for (dev = inputInfo.devices; dev; dev = dev->next) {
        if (dev != xwl_seat->keyboard &&
            dev != GetMaster(xwl_seat->keyboard, MASTER_KEYBOARD))
            continue;

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        if (rate != 0) {
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            ctrl = dev->key->xkbInfo->desc->ctrls;
            ctrl->repeat_delay = delay;
            /* rate is number of keys per second */
            ctrl->repeat_interval = 1000 / rate;

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            XkbSetRepeatKeys(dev, -1, AutoRepeatModeOn);
        } else
            XkbSetRepeatKeys(dev, -1, AutoRepeatModeOff);
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    }
}

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static const struct wl_keyboard_listener keyboard_listener = {
    keyboard_handle_keymap,
    keyboard_handle_enter,
    keyboard_handle_leave,
    keyboard_handle_key,
    keyboard_handle_modifiers,
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    keyboard_handle_repeat_info,
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};

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static struct xwl_touch *
xwl_seat_lookup_touch(struct xwl_seat *xwl_seat, int32_t id)
{
    struct xwl_touch *xwl_touch, *next_xwl_touch;

    xorg_list_for_each_entry_safe(xwl_touch, next_xwl_touch,
                                  &xwl_seat->touches, link_touch) {
        if (xwl_touch->id == id)
            return xwl_touch;
    }

    return NULL;
}

static void
xwl_touch_send_event(struct xwl_touch *xwl_touch,
                     struct xwl_seat *xwl_seat, int type)
{
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    double dx, dy, x, y;
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    ValuatorMask mask;

    dx = xwl_touch->window->window->drawable.x;
    dy = xwl_touch->window->window->drawable.y;

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    x = (dx + xwl_touch->x) * 0xFFFF / xwl_seat->xwl_screen->width;
    y = (dy + xwl_touch->y) * 0xFFFF / xwl_seat->xwl_screen->height;

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    valuator_mask_zero(&mask);
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    valuator_mask_set_double(&mask, 0, x);
    valuator_mask_set_double(&mask, 1, y);
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    QueueTouchEvents(xwl_seat->touch, type, xwl_touch->id, 0, &mask);
}

static void
touch_handle_down(void *data, struct wl_touch *wl_touch,
                  uint32_t serial, uint32_t time,
                  struct wl_surface *surface,
                  int32_t id, wl_fixed_t sx_w, wl_fixed_t sy_w)
{
    struct xwl_seat *xwl_seat = data;
    struct xwl_touch *xwl_touch;

    if (surface == NULL)
        return;

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    xwl_touch = calloc(1, sizeof *xwl_touch);
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    if (xwl_touch == NULL) {
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        ErrorF("%s: ENOMEM\n", __func__);
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        return;
    }

    xwl_touch->window = wl_surface_get_user_data(surface);
    xwl_touch->id = id;
    xwl_touch->x = wl_fixed_to_int(sx_w);
    xwl_touch->y = wl_fixed_to_int(sy_w);
    xorg_list_add(&xwl_touch->link_touch, &xwl_seat->touches);

    xwl_touch_send_event(xwl_touch, xwl_seat, XI_TouchBegin);
}

static void
touch_handle_up(void *data, struct wl_touch *wl_touch,
                uint32_t serial, uint32_t time, int32_t id)
{
    struct xwl_touch *xwl_touch;
    struct xwl_seat *xwl_seat = data;

    xwl_touch = xwl_seat_lookup_touch(xwl_seat, id);

    if (!xwl_touch)
        return;

    xwl_touch_send_event(xwl_touch, xwl_seat, XI_TouchEnd);
    xorg_list_del(&xwl_touch->link_touch);
    free(xwl_touch);
}

static void
touch_handle_motion(void *data, struct wl_touch *wl_touch,
                    uint32_t time, int32_t id,
                    wl_fixed_t sx_w, wl_fixed_t sy_w)
{
    struct xwl_seat *xwl_seat = data;
    struct xwl_touch *xwl_touch;

    xwl_touch = xwl_seat_lookup_touch(xwl_seat, id);

    if (!xwl_touch)
        return;

    xwl_touch->x = wl_fixed_to_int(sx_w);
    xwl_touch->y = wl_fixed_to_int(sy_w);
    xwl_touch_send_event(xwl_touch, xwl_seat, XI_TouchUpdate);
}

static void
touch_handle_frame(void *data, struct wl_touch *wl_touch)
{
}

static void
touch_handle_cancel(void *data, struct wl_touch *wl_touch)
{
    struct xwl_seat *xwl_seat = data;
    struct xwl_touch *xwl_touch, *next_xwl_touch;

    xorg_list_for_each_entry_safe(xwl_touch, next_xwl_touch,
                                  &xwl_seat->touches, link_touch) {
        /* We can't properly notify of cancellation to the X client
         * once it thinks it has the ownership, send at least a
         * TouchEnd event.
         */
        xwl_touch_send_event(xwl_touch, xwl_seat, XI_TouchEnd);
        xorg_list_del(&xwl_touch->link_touch);
        free(xwl_touch);
    }
}

static const struct wl_touch_listener touch_listener = {
    touch_handle_down,
    touch_handle_up,
    touch_handle_motion,
    touch_handle_frame,
    touch_handle_cancel
};

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static struct xwl_seat *
find_matching_seat(DeviceIntPtr device)
{
    DeviceIntPtr dev;

    for (dev = inputInfo.devices; dev; dev = dev->next)
        if (dev->deviceProc == xwl_keyboard_proc &&
            device == GetMaster(dev, MASTER_KEYBOARD))
                return (struct xwl_seat *) dev->public.devicePrivate;

    return NULL;
}

static void
release_grab(struct xwl_seat *xwl_seat)
{
    if (xwl_seat->keyboard_grab)
        zwp_xwayland_keyboard_grab_v1_destroy(xwl_seat->keyboard_grab);
    xwl_seat->keyboard_grab = NULL;
}

static void
set_grab(struct xwl_seat *xwl_seat, struct xwl_window *xwl_window)
{
    struct xwl_screen *xwl_screen;

    if (!xwl_window)
        return;

    /* We already have a grab */
    if (xwl_seat->keyboard_grab)
        release_grab (xwl_seat);

    xwl_screen = xwl_seat->xwl_screen;
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    xwl_seat->keyboard_grab =
        zwp_xwayland_keyboard_grab_manager_v1_grab_keyboard(xwl_screen->wp_grab,
                                                            xwl_window->surface,
                                                            xwl_seat->seat);
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}

static void
xwl_keyboard_activate_grab(DeviceIntPtr device, GrabPtr grab, TimeStamp time, Bool passive)
{
    struct xwl_seat *xwl_seat = device->public.devicePrivate;

    /* We are not interested in passive grabs */
    if (!passive) {
        /* If the device is the MASTER_KEYBOARD, we don't have an xwl_seat */
        if (xwl_seat == NULL)
            xwl_seat = find_matching_seat(device);
        if (xwl_seat)
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            set_grab(xwl_seat, xwl_window_from_window(grab->window));
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    }

    ActivateKeyboardGrab(device, grab, time, passive);
}

static void
xwl_keyboard_deactivate_grab(DeviceIntPtr device)
{
    struct xwl_seat *xwl_seat = device->public.devicePrivate;

    /* If the device is the MASTER_KEYBOARD, we don't have an xwl_seat */
    if (xwl_seat == NULL)
        xwl_seat = find_matching_seat(device);
    if (xwl_seat)
        release_grab (xwl_seat);

    DeactivateKeyboardGrab(device);
}

static void
setup_keyboard_grab_handler (DeviceIntPtr device)
{
    device->deviceGrab.ActivateGrab = xwl_keyboard_activate_grab;
    device->deviceGrab.DeactivateGrab = xwl_keyboard_deactivate_grab;
}

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static DeviceIntPtr
add_device(struct xwl_seat *xwl_seat,
           const char *driver, DeviceProc device_proc)
{
    DeviceIntPtr dev = NULL;
    static Atom type_atom;
    char name[32];

    dev = AddInputDevice(serverClient, device_proc, TRUE);
    if (dev == NULL)
        return NULL;

    if (type_atom == None)
        type_atom = MakeAtom(driver, strlen(driver), TRUE);
    snprintf(name, sizeof name, "%s:%d", driver, xwl_seat->id);
    AssignTypeAndName(dev, type_atom, name);
    dev->public.devicePrivate = xwl_seat;
    dev->type = SLAVE;
    dev->spriteInfo->spriteOwner = FALSE;

    return dev;
}

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static void
disable_device(DeviceIntPtr dev)
{
    DisableDevice(dev, TRUE);
    dev->public.devicePrivate = NULL;
}

static void
enable_device(struct xwl_seat *xwl_seat, DeviceIntPtr dev)
{
    dev->public.devicePrivate = xwl_seat;
    EnableDevice(dev, TRUE);
}


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static void
init_pointer(struct xwl_seat *xwl_seat)
{
    xwl_seat->wl_pointer = wl_seat_get_pointer(xwl_seat->seat);
    wl_pointer_add_listener(xwl_seat->wl_pointer,
                            &pointer_listener, xwl_seat);

    if (xwl_seat->pointer == NULL) {
        xwl_seat_set_cursor(xwl_seat);
        xwl_seat->pointer =
            add_device(xwl_seat, "xwayland-pointer", xwl_pointer_proc);
        ActivateDevice(xwl_seat->pointer, TRUE);
    }
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    enable_device(xwl_seat, xwl_seat->pointer);
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}

static void
release_pointer(struct xwl_seat *xwl_seat)
{
    wl_pointer_release(xwl_seat->wl_pointer);
    xwl_seat->wl_pointer = NULL;

    if (xwl_seat->pointer)
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        disable_device(xwl_seat->pointer);
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}

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static void
init_relative_pointer(struct xwl_seat *xwl_seat)
{
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    struct zwp_relative_pointer_manager_v1 *relative_pointer_manager =
        xwl_seat->xwl_screen->relative_pointer_manager;

    if (relative_pointer_manager) {
        xwl_seat->wp_relative_pointer =
            zwp_relative_pointer_manager_v1_get_relative_pointer(
                relative_pointer_manager, xwl_seat->wl_pointer);
        zwp_relative_pointer_v1_add_listener(xwl_seat->wp_relative_pointer,
                                             &relative_pointer_listener,
                                             xwl_seat);
    }

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    if (xwl_seat->relative_pointer == NULL) {
        xwl_seat->relative_pointer =
            add_device(xwl_seat, "xwayland-relative-pointer",
                       xwl_pointer_proc_relative);
        ActivateDevice(xwl_seat->relative_pointer, TRUE);
    }
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    enable_device(xwl_seat, xwl_seat->relative_pointer);
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}

static void
release_relative_pointer(struct xwl_seat *xwl_seat)
{
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    if (xwl_seat->wp_relative_pointer) {
        zwp_relative_pointer_v1_destroy(xwl_seat->wp_relative_pointer);
        xwl_seat->wp_relative_pointer = NULL;
    }

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    if (xwl_seat->relative_pointer)
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        disable_device(xwl_seat->relative_pointer);
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}

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static void
init_keyboard(struct xwl_seat *xwl_seat)
{
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    DeviceIntPtr master;

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    xwl_seat->wl_keyboard = wl_seat_get_keyboard(xwl_seat->seat);
    wl_keyboard_add_listener(xwl_seat->wl_keyboard,
                             &keyboard_listener, xwl_seat);

    if (xwl_seat->keyboard == NULL) {
        xwl_seat->keyboard =
            add_device(xwl_seat, "xwayland-keyboard", xwl_keyboard_proc);
        ActivateDevice(xwl_seat->keyboard, TRUE);
    }
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    enable_device(xwl_seat, xwl_seat->keyboard);
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    xwl_seat->keyboard->key->xkbInfo->checkRepeat = keyboard_check_repeat;
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    if (xwl_seat->xwl_screen->wp_grab) {
        /* We have Xwayland grab protocol supported by the compositor */
        master = GetMaster(xwl_seat->keyboard, MASTER_KEYBOARD);
        if (master)
            setup_keyboard_grab_handler(master);
    }
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}

static void
release_keyboard(struct xwl_seat *xwl_seat)
{
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    release_grab(xwl_seat);
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    wl_keyboard_release(xwl_seat->wl_keyboard);
    xwl_seat->wl_keyboard = NULL;

    if (xwl_seat->keyboard) {
        remove_sync_pending(xwl_seat->keyboard);
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        disable_device(xwl_seat->keyboard);
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    }
}

static void
init_touch(struct xwl_seat *xwl_seat)
{
    xwl_seat->wl_touch = wl_seat_get_touch(xwl_seat->seat);
    wl_touch_add_listener(xwl_seat->wl_touch,
                          &touch_listener, xwl_seat);

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    if (xwl_seat->touch == NULL) {
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        xwl_seat->touch =
            add_device(xwl_seat, "xwayland-touch", xwl_touch_proc);
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        ActivateDevice(xwl_seat->touch, TRUE);
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    }
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    enable_device(xwl_seat, xwl_seat->touch);
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}

static void
release_touch(struct xwl_seat *xwl_seat)
{
    wl_touch_release(xwl_seat->wl_touch);
    xwl_seat->wl_touch = NULL;

    if (xwl_seat->touch)
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        disable_device(xwl_seat->touch);
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}

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static void
seat_handle_capabilities(void *data, struct wl_seat *seat,
                         enum wl_seat_capability caps)
{
    struct xwl_seat *xwl_seat = data;

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    if (caps & WL_SEAT_CAPABILITY_POINTER && xwl_seat->wl_pointer == NULL) {
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        init_pointer(xwl_seat);
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        init_relative_pointer(xwl_seat);
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    } else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && xwl_seat->wl_pointer) {
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        release_pointer(xwl_seat);
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        release_relative_pointer(xwl_seat);
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    }

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    if (caps & WL_SEAT_CAPABILITY_KEYBOARD && xwl_seat->wl_keyboard == NULL) {
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        init_keyboard(xwl_seat);
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    } else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && xwl_seat->wl_keyboard) {
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        release_keyboard(xwl_seat);
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    }

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    if (caps & WL_SEAT_CAPABILITY_TOUCH && xwl_seat->wl_touch == NULL) {
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        init_touch(xwl_seat);
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    } else if (!(caps & WL_SEAT_CAPABILITY_TOUCH) && xwl_seat->wl_touch) {
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        release_touch(xwl_seat);
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    }

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    xwl_seat->xwl_screen->expecting_event--;
}

static void
seat_handle_name(void *data, struct wl_seat *seat,
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                 const char *name)
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{

}

static const struct wl_seat_listener seat_listener = {
    seat_handle_capabilities,
    seat_handle_name
};

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static void
xwl_cursor_init(struct xwl_cursor *xwl_cursor, struct xwl_screen *xwl_screen,
                void (* update_proc)(struct xwl_cursor *))
{
    xwl_cursor->surface = wl_compositor_create_surface(xwl_screen->compositor);
    xwl_cursor->update_proc = update_proc;
    xwl_cursor->frame_cb = NULL;
    xwl_cursor->needs_update = FALSE;
}

static void
xwl_cursor_release(struct xwl_cursor *xwl_cursor)
{
    wl_surface_destroy(xwl_cursor->surface);
    if (xwl_cursor->frame_cb)
        wl_callback_destroy(xwl_cursor->frame_cb);
}

static void
xwl_seat_update_cursor(struct xwl_cursor *xwl_cursor)
{
    struct xwl_seat *xwl_seat = wl_container_of(xwl_cursor, xwl_seat, cursor);
    xwl_seat_set_cursor(xwl_seat);
}

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static void
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create_input_device(struct xwl_screen *xwl_screen, uint32_t id, uint32_t version)
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{
    struct xwl_seat *xwl_seat;

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    xwl_seat = calloc(1, sizeof *xwl_seat);
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    if (xwl_seat == NULL) {
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        ErrorF("%s: ENOMEM\n", __func__);
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        return;
    }

    xwl_seat->xwl_screen = xwl_screen;
    xorg_list_add(&xwl_seat->link, &xwl_screen->seat_list);

    xwl_seat->seat =
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        wl_registry_bind(xwl_screen->registry, id,
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                         &wl_seat_interface, min(version, 5));
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    xwl_seat->id = id;

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    xwl_cursor_init(&xwl_seat->cursor, xwl_seat->xwl_screen,
                    xwl_seat_update_cursor);
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    wl_seat_add_listener(xwl_seat->seat, &seat_listener, xwl_seat);
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    init_tablet_manager_seat(xwl_screen, xwl_seat);

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    wl_array_init(&xwl_seat->keys);
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    xorg_list_init(&xwl_seat->touches);
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    xorg_list_init(&xwl_seat->axis_discrete_pending);
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    xorg_list_init(&xwl_seat->sync_pending);
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}

void
xwl_seat_destroy(struct xwl_seat *xwl_seat)
{
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    struct xwl_touch *xwl_touch, *next_xwl_touch;
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    struct sync_pending *p, *npd;
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    struct axis_discrete_pending *ad, *ad_next;
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    xorg_list_for_each_entry_safe(xwl_touch, next_xwl_touch,
                                  &xwl_seat->touches, link_touch) {
        xorg_list_del(&xwl_touch->link_touch);
        free(xwl_touch);
    }

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    xorg_list_for_each_entry_safe(p, npd, &xwl_seat->sync_pending, l) {
        xorg_list_del(&xwl_seat->sync_pending);
        free (p);
    }

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    xorg_list_for_each_entry_safe(ad, ad_next, &xwl_seat->axis_discrete_pending, l) {
        xorg_list_del(&ad->l);
        free(ad);
    }

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    release_tablet_manager_seat(xwl_seat);

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    release_grab(xwl_seat);
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    wl_seat_destroy(xwl_seat->seat);
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    xwl_cursor_release(&xwl_seat->cursor);
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    wl_array_release(&xwl_seat->keys);
    free(xwl_seat);
}

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static void
tablet_handle_name(void *data, struct zwp_tablet_v2 *tablet, const char *name)
{
}

static void
tablet_handle_id(void *data, struct zwp_tablet_v2 *tablet, uint32_t vid,
                  uint32_t pid)
{
}

static void
tablet_handle_path(void *data, struct zwp_tablet_v2 *tablet, const char *path)
{
}

static void
tablet_handle_done(void *data, struct zwp_tablet_v2 *tablet)
{
    struct xwl_tablet *xwl_tablet = data;
    struct xwl_seat *xwl_seat = xwl_tablet->seat;

    if (xwl_seat->stylus == NULL) {
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        xwl_seat->stylus = add_device(xwl_seat, "xwayland-tablet stylus", xwl_tablet_proc);
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        ActivateDevice(xwl_seat->stylus, TRUE);
    }
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    enable_device(xwl_seat, xwl_seat->stylus);
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    if (xwl_seat->eraser == NULL) {
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        xwl_seat->eraser = add_device(xwl_seat, "xwayland-tablet eraser", xwl_tablet_proc);
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        ActivateDevice(xwl_seat->eraser, TRUE);
    }
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    enable_device(xwl_seat, xwl_seat->eraser);
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    if (xwl_seat->puck == NULL) {
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        xwl_seat->puck = add_device(xwl_seat, "xwayland-tablet cursor", xwl_tablet_proc);
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        ActivateDevice(xwl_seat->puck, TRUE);
    }
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    enable_device(xwl_seat, xwl_seat->puck);
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}

static void
tablet_handle_removed(void *data, struct zwp_tablet_v2 *tablet)
{
    struct xwl_tablet *xwl_tablet = data;
    struct xwl_seat *xwl_seat = xwl_tablet->seat;

    xorg_list_del(&xwl_tablet->link);

    /* The tablet is merely disabled, not removed. The next tablet
       will re-use the same X devices */
    if (xorg_list_is_empty(&xwl_seat->tablets)) {
        if (xwl_seat->stylus)
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            disable_device(xwl_seat->stylus);
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        if (xwl_seat->eraser)
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            disable_device(xwl_seat->eraser);
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        if (xwl_seat->puck)
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            disable_device(xwl_seat->puck);
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        /* pads are removed separately */
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    }

    zwp_tablet_v2_destroy(tablet);
    free(xwl_tablet);
}

static const struct zwp_tablet_v2_listener tablet_listener = {
    tablet_handle_name,
    tablet_handle_id,
    tablet_handle_path,
    tablet_handle_done,
    tablet_handle_removed
};
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static void
tablet_tool_receive_type(void *data, struct zwp_tablet_tool_v2 *tool,
                         uint32_t type)
{
    struct xwl_tablet_tool *xwl_tablet_tool = data;
    struct xwl_seat *xwl_seat = xwl_tablet_tool->seat;

    switch (type) {
        case ZWP_TABLET_TOOL_V2_TYPE_ERASER:
            xwl_tablet_tool->xdevice = xwl_seat->eraser;
            break;
        case ZWP_TABLET_TOOL_V2_TYPE_MOUSE:
        case ZWP_TABLET_TOOL_V2_TYPE_LENS:
            xwl_tablet_tool->xdevice = xwl_seat->puck;
            break;
        default:
            xwl_tablet_tool->xdevice = xwl_seat->stylus;
            break;
    }
}

static void
tablet_tool_receive_hardware_serial(void *data, struct zwp_tablet_tool_v2 *tool,
                                    uint32_t hi, uint32_t low)
{
}

static void
tablet_tool_receive_hardware_id_wacom(void *data, struct zwp_tablet_tool_v2 *tool,
                                      uint32_t hi, uint32_t low)
{
}

static void
tablet_tool_receive_capability(void *data, struct zwp_tablet_tool_v2 *tool,
                               uint32_t capability)
{
}

static void
tablet_tool_receive_done(void *data, struct zwp_tablet_tool_v2 *tool)
{
}

static void
tablet_tool_receive_removed(void *data, struct zwp_tablet_tool_v2 *tool)
{
    struct xwl_tablet_tool *xwl_tablet_tool = data;

    xorg_list_del(&xwl_tablet_tool->link);
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    xwl_cursor_release(&xwl_tablet_tool->cursor);
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    zwp_tablet_tool_v2_destroy(tool);
    free(xwl_tablet_tool);
}

static void
tablet_tool_proximity_in(void *data, struct zwp_tablet_tool_v2 *tool,
                         uint32_t serial, struct zwp_tablet_v2 *tablet,
                         struct wl_surface *wl_surface)
{
    struct xwl_tablet_tool *xwl_tablet_tool = data;
    struct xwl_seat *xwl_seat = xwl_tablet_tool->seat;

    /* There's a race here where if we create and then immediately
     * destroy a surface, we might end up in a state where the Wayland
     * compositor sends us an event for a surface that doesn't exist.
     *
     * Don't process enter events in this case.
     *
     * see pointer_handle_enter()
     */
    if (wl_surface == NULL)
        return;

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    xwl_tablet_tool->proximity_in_serial = serial;
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    xwl_seat->tablet_focus_window = wl_surface_get_user_data(wl_surface);
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    xwl_tablet_tool_set_cursor(xwl_tablet_tool);
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}

static void
tablet_tool_proximity_out(void *data, struct zwp_tablet_tool_v2 *tool)
{
    struct xwl_tablet_tool *xwl_tablet_tool = data;
    struct xwl_seat *xwl_seat = xwl_tablet_tool->seat;

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    xwl_tablet_tool->proximity_in_serial = 0;
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    xwl_seat->tablet_focus_window = NULL;
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    xwl_tablet_tool->pressure = 0;
    xwl_tablet_tool->tilt_x = 0;
    xwl_tablet_tool->tilt_y = 0;
    xwl_tablet_tool->rotation = 0;
    xwl_tablet_tool->slider = 0;
}

static void
tablet_tool_down(void *data, struct zwp_tablet_tool_v2 *tool, uint32_t serial)
{
    struct xwl_tablet_tool *xwl_tablet_tool = data;
    struct xwl_seat *xwl_seat = xwl_tablet_tool->seat;
    ValuatorMask mask;

    xwl_seat->xwl_screen->serial = serial;

    valuator_mask_zero(&mask);
    QueuePointerEvents(xwl_tablet_tool->xdevice, ButtonPress, 1, 0, &mask);
}

static void
tablet_tool_up(void *data, struct zwp_tablet_tool_v2 *tool)
{
    struct xwl_tablet_tool *xwl_tablet_tool = data;
    ValuatorMask mask;

    valuator_mask_zero(&mask);
    QueuePointerEvents(xwl_tablet_tool->xdevice, ButtonRelease, 1, 0, &mask);
}

static void
tablet_tool_motion(void *data, struct zwp_tablet_tool_v2 *tool,
                   wl_fixed_t x, wl_fixed_t y)
{
    struct xwl_tablet_tool *xwl_tablet_tool = data;
    struct xwl_seat *xwl_seat = xwl_tablet_tool->seat;
    int32_t dx, dy;
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    double sx = wl_fixed_to_double(x);
    double sy = wl_fixed_to_double(y);
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    if (!xwl_seat->tablet_focus_window)
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        return;

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    dx = xwl_seat->tablet_focus_window->window->drawable.x;
    dy = xwl_seat->tablet_focus_window->window->drawable.y;
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