10 files changed, 644 insertions, 46 deletions

diff --git a/include/sway/input/cursor.h b/include/sway/input/cursor.h
index 516718c9..e46c9b18 100644
--- a/include/sway/input/cursor.h
+++ b/include/sway/input/cursor.h
@@ -21,6 +21,8 @@ struct sway_cursor {
                 struct sway_node *node;
         } previous;
         struct wlr_xcursor_manager *xcursor_manager;
+        struct wl_list tablets;
+        struct wl_list tablet_pads;
 
         const char *image;
         struct wl_client *image_client;
@@ -42,6 +44,7 @@ struct sway_cursor {
 
         struct wl_listener tool_axis;
         struct wl_listener tool_tip;
+        struct wl_listener tool_proximity;
         struct wl_listener tool_button;
         uint32_t tool_buttons;
 
diff --git a/include/sway/input/seat.h b/include/sway/input/seat.h
index c963de9b..24a6fed4 100644
--- a/include/sway/input/seat.h
+++ b/include/sway/input/seat.h
@@ -28,6 +28,8 @@ struct sway_seat_device {
         struct sway_input_device *input_device;
         struct sway_keyboard *keyboard;
         struct sway_switch *switch_device;
+        struct sway_tablet *tablet;
+        struct sway_tablet_pad *tablet_pad;
         struct wl_list link; // sway_seat::devices
 };
 
diff --git a/include/sway/input/tablet.h b/include/sway/input/tablet.h
new file mode 100644
index 00000000..f30e232a
--- /dev/null
+++ b/include/sway/input/tablet.h
@@ -0,0 +1,62 @@
+#ifndef _SWAY_INPUT_TABLET_H
+#define _SWAY_INPUT_TABLET_H
+#include <wlr/types/wlr_layer_shell_v1.h>
+
+struct sway_seat;
+struct wlr_tablet_tool;
+
+struct sway_tablet {
+        struct wl_list link;
+        struct sway_seat_device *seat_device;
+        struct wlr_tablet_v2_tablet *tablet_v2;
+};
+
+struct sway_tablet_tool {
+        struct sway_seat *seat;
+        struct sway_tablet *tablet;
+        struct wlr_tablet_v2_tablet_tool *tablet_v2_tool;
+
+        double tilt_x, tilt_y;
+
+        struct wl_listener set_cursor;
+        struct wl_listener tool_destroy;
+};
+
+struct sway_tablet_pad {
+        struct wl_list link;
+        struct sway_seat_device *seat_device;
+        struct sway_tablet *tablet;
+        struct wlr_tablet_v2_tablet_pad *tablet_v2_pad;
+
+        struct wl_listener attach;
+        struct wl_listener button;
+        struct wl_listener ring;
+        struct wl_listener strip;
+
+        struct wlr_surface *current_surface;
+        struct wl_listener surface_destroy;
+
+        struct wl_listener tablet_destroy;
+};
+
+struct sway_tablet *sway_tablet_create(struct sway_seat *seat,
+                struct sway_seat_device *device);
+
+void sway_configure_tablet(struct sway_tablet *tablet);
+
+void sway_tablet_destroy(struct sway_tablet *tablet);
+
+void sway_tablet_tool_configure(struct sway_tablet *tablet,
+                struct wlr_tablet_tool *wlr_tool);
+
+struct sway_tablet_pad *sway_tablet_pad_create(struct sway_seat *seat,
+                struct sway_seat_device *device);
+
+void sway_configure_tablet_pad(struct sway_tablet_pad *tablet_pad);
+
+void sway_tablet_pad_destroy(struct sway_tablet_pad *tablet_pad);
+
+void sway_tablet_pad_notify_enter(struct sway_tablet_pad *tablet_pad,
+                struct wlr_surface *surface);
+
+#endif
diff --git a/include/sway/server.h b/include/sway/server.h
index a43cbf72..cd411d3b 100644
--- a/include/sway/server.h
+++ b/include/sway/server.h
@@ -44,6 +44,8 @@ struct sway_server {
         struct wlr_xdg_shell *xdg_shell;
         struct wl_listener xdg_shell_surface;
 
+        struct wlr_tablet_manager_v2 *tablet_v2;
+
 #if HAVE_XWAYLAND
         struct sway_xwayland xwayland;
         struct wl_listener xwayland_surface;
diff --git a/protocols/meson.build b/protocols/meson.build
index 4ba6f723..f2f90dad 100644
--- a/protocols/meson.build
+++ b/protocols/meson.build
@@ -14,6 +14,7 @@ protocols = [
         [wl_protocol_dir, 'stable/xdg-shell/xdg-shell.xml'],
         [wl_protocol_dir, 'unstable/xdg-output/xdg-output-unstable-v1.xml'],
         [wl_protocol_dir, 'unstable/pointer-constraints/pointer-constraints-unstable-v1.xml'],
+        [wl_protocol_dir, 'unstable/tablet/tablet-unstable-v2.xml'],
         ['wlr-layer-shell-unstable-v1.xml'],
         ['idle.xml'],
         ['wlr-input-inhibitor-unstable-v1.xml'],
diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index c6a332b8..574186d7 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -10,6 +10,7 @@
 #include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_cursor.h>
 #include <wlr/types/wlr_idle.h>
+#include <wlr/types/wlr_tablet_v2.h>
 #include <wlr/types/wlr_xcursor_manager.h>
 #include <wlr/util/region.h>
 #include "list.h"
@@ -20,6 +21,7 @@
 #include "sway/desktop/transaction.h"
 #include "sway/input/cursor.h"
 #include "sway/input/keyboard.h"
+#include "sway/input/tablet.h"
 #include "sway/layers.h"
 #include "sway/output.h"
 #include "sway/tree/arrange.h"
@@ -443,72 +445,224 @@ static void apply_mapping_from_region(struct wlr_input_device *device,
         *y = apply_mapping_from_coord(y1, y2, *y);
 }
 
+static void handle_tablet_tool_position(struct sway_cursor *cursor,
+                struct sway_tablet *tablet,
+                struct wlr_tablet_tool *tool,
+                bool change_x, bool change_y,
+                double x, double y, double dx, double dy,
+                int32_t time_msec) {
+        if (!change_x && !change_y) {
+                return;
+        }
+
+        struct sway_input_device *input_device = tablet->seat_device->input_device;
+        struct input_config *ic = input_device_get_config(input_device);
+        if (ic != NULL && ic->mapped_from_region != NULL) {
+                apply_mapping_from_region(input_device->wlr_device,
+                        ic->mapped_from_region, &x, &y);
+        }
+
+        switch (tool->type) {
+        case WLR_TABLET_TOOL_TYPE_MOUSE:
+                wlr_cursor_move(cursor->cursor, input_device->wlr_device, dx, dy);
+                break;
+        default:
+                wlr_cursor_warp_absolute(cursor->cursor, input_device->wlr_device,
+                        change_x ? x : NAN, change_y ? y : NAN);
+        }
+
+        double sx, sy;
+        struct wlr_surface *surface = NULL;
+        struct sway_seat *seat = cursor->seat;
+        node_at_coords(seat, cursor->cursor->x, cursor->cursor->y,
+                &surface, &sx, &sy);
+        struct sway_tablet_tool *sway_tool = tool->data;
+
+        if (!surface || !wlr_surface_accepts_tablet_v2(tablet->tablet_v2, surface)) {
+                wlr_tablet_v2_tablet_tool_notify_proximity_out(sway_tool->tablet_v2_tool);
+                cursor_motion(cursor, time_msec, input_device->wlr_device, dx, dy, dx, dy);
+                return;
+        }
+
+        wlr_tablet_v2_tablet_tool_notify_proximity_in(sway_tool->tablet_v2_tool,
+                tablet->tablet_v2, surface);
+
+        wlr_tablet_v2_tablet_tool_notify_motion(sway_tool->tablet_v2_tool, sx, sy);
+}
+
 static void handle_tool_axis(struct wl_listener *listener, void *data) {
         struct sway_cursor *cursor = wl_container_of(listener, cursor, tool_axis);
         wlr_idle_notify_activity(server.idle, cursor->seat->wlr_seat);
         struct wlr_event_tablet_tool_axis *event = data;
-        struct sway_input_device *input_device = event->device->data;
+        struct sway_tablet_tool *sway_tool = event->tool->data;
 
-        double x = NAN, y = NAN;
-        if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X)) {
-                x = event->x;
+        if (!sway_tool) {
+                sway_log(SWAY_DEBUG, "tool axis before proximity");
+                return;
         }
-        if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) {
-                y = event->y;
+
+        handle_tablet_tool_position(cursor, sway_tool->tablet, event->tool,
+                event->updated_axes & WLR_TABLET_TOOL_AXIS_X,
+                event->updated_axes & WLR_TABLET_TOOL_AXIS_Y,
+                event->x, event->y, event->dx, event->dy, event->time_msec);
+
+        if (event->updated_axes & WLR_TABLET_TOOL_AXIS_PRESSURE) {
+                wlr_tablet_v2_tablet_tool_notify_pressure(
+                        sway_tool->tablet_v2_tool, event->pressure);
         }
 
-        struct input_config *ic = input_device_get_config(input_device);
-        if (ic != NULL && ic->mapped_from_region != NULL) {
-                apply_mapping_from_region(event->device, ic->mapped_from_region, &x, &y);
+        if (event->updated_axes & WLR_TABLET_TOOL_AXIS_DISTANCE) {
+                wlr_tablet_v2_tablet_tool_notify_distance(
+                        sway_tool->tablet_v2_tool, event->distance);
         }
 
-        double lx, ly;
-        wlr_cursor_absolute_to_layout_coords(cursor->cursor, event->device,
-                        x, y, &lx, &ly);
+        if (event->updated_axes & WLR_TABLET_TOOL_AXIS_TILT_X) {
+                sway_tool->tilt_x = event->tilt_x;
+        }
 
-        double dx = lx - cursor->cursor->x;
-        double dy = ly - cursor->cursor->y;
+        if (event->updated_axes & WLR_TABLET_TOOL_AXIS_TILT_Y) {
+                sway_tool->tilt_y = event->tilt_y;
+        }
 
-        cursor_motion(cursor, event->time_msec, event->device, dx, dy, dx, dy);
-        wlr_seat_pointer_notify_frame(cursor->seat->wlr_seat);
-        transaction_commit_dirty();
+        if (event->updated_axes & (WLR_TABLET_TOOL_AXIS_TILT_X | WLR_TABLET_TOOL_AXIS_TILT_Y)) {
+                wlr_tablet_v2_tablet_tool_notify_tilt(
+                        sway_tool->tablet_v2_tool,
+                        sway_tool->tilt_x, sway_tool->tilt_y);
+        }
+
+        if (event->updated_axes & WLR_TABLET_TOOL_AXIS_ROTATION) {
+                wlr_tablet_v2_tablet_tool_notify_rotation(
+                        sway_tool->tablet_v2_tool, event->rotation);
+        }
+
+        if (event->updated_axes & WLR_TABLET_TOOL_AXIS_SLIDER) {
+                wlr_tablet_v2_tablet_tool_notify_slider(
+                        sway_tool->tablet_v2_tool, event->slider);
+        }
+
+        if (event->updated_axes & WLR_TABLET_TOOL_AXIS_WHEEL) {
+                wlr_tablet_v2_tablet_tool_notify_wheel(
+                        sway_tool->tablet_v2_tool, event->wheel_delta, 0);
+        }
 }
 
 static void handle_tool_tip(struct wl_listener *listener, void *data) {
         struct sway_cursor *cursor = wl_container_of(listener, cursor, tool_tip);
         wlr_idle_notify_activity(server.idle, cursor->seat->wlr_seat);
         struct wlr_event_tablet_tool_tip *event = data;
-        dispatch_cursor_button(cursor, event->device, event->time_msec,
-                        BTN_LEFT, event->state == WLR_TABLET_TOOL_TIP_DOWN ?
-                                WLR_BUTTON_PRESSED : WLR_BUTTON_RELEASED);
-        wlr_seat_pointer_notify_frame(cursor->seat->wlr_seat);
-        transaction_commit_dirty();
+        struct sway_tablet_tool *sway_tool = event->tool->data;
+        struct wlr_tablet_v2_tablet *tablet_v2 = sway_tool->tablet->tablet_v2;
+        struct sway_seat *seat = cursor->seat;
+
+        double sx, sy;
+        struct wlr_surface *surface = NULL;
+        node_at_coords(seat, cursor->cursor->x, cursor->cursor->y,
+                &surface, &sx, &sy);
+
+        if (!surface || !wlr_surface_accepts_tablet_v2(tablet_v2, surface)) {
+                dispatch_cursor_button(cursor, event->device, event->time_msec,
+                                BTN_LEFT, event->state == WLR_TABLET_TOOL_TIP_DOWN ?
+                                        WLR_BUTTON_PRESSED : WLR_BUTTON_RELEASED);
+                wlr_seat_pointer_notify_frame(cursor->seat->wlr_seat);
+                transaction_commit_dirty();
+                return;
+        }
+
+        if (event->state == WLR_TABLET_TOOL_TIP_DOWN) {
+                wlr_tablet_v2_tablet_tool_notify_down(sway_tool->tablet_v2_tool);
+                wlr_tablet_tool_v2_start_implicit_grab(sway_tool->tablet_v2_tool);
+        } else {
+                wlr_tablet_v2_tablet_tool_notify_up(sway_tool->tablet_v2_tool);
+        }
+}
+
+static struct sway_tablet *get_tablet_for_device(struct sway_cursor *cursor,
+                struct wlr_input_device *device) {
+        struct sway_tablet *tablet;
+        wl_list_for_each(tablet, &cursor->tablets, link) {
+                if (tablet->seat_device->input_device->wlr_device == device) {
+                        return tablet;
+                }
+        }
+        return NULL;
+}
+
+static void handle_tool_proximity(struct wl_listener *listener, void *data) {
+        struct sway_cursor *cursor = wl_container_of(listener, cursor, tool_proximity);
+        wlr_idle_notify_activity(server.idle, cursor->seat->wlr_seat);
+        struct wlr_event_tablet_tool_proximity *event = data;
+
+        struct wlr_tablet_tool *tool = event->tool;
+        if (!tool->data) {
+                struct sway_tablet *tablet = get_tablet_for_device(cursor, event->device);
+                if (!tablet) {
+                        sway_log(SWAY_ERROR, "no tablet for tablet tool");
+                        return;
+                }
+                sway_tablet_tool_configure(tablet, tool);
+        }
+
+        struct sway_tablet_tool *sway_tool = tool->data;
+        if (!sway_tool) {
+                sway_log(SWAY_ERROR, "tablet tool not initialized");
+                return;
+        }
+
+        if (event->state == WLR_TABLET_TOOL_PROXIMITY_OUT) {
+                wlr_tablet_v2_tablet_tool_notify_proximity_out(sway_tool->tablet_v2_tool);
+                return;
+        }
+
+        handle_tablet_tool_position(cursor, sway_tool->tablet, event->tool,
+                true, true, event->x, event->y, 0, 0, event->time_msec);
 }
 
 static void handle_tool_button(struct wl_listener *listener, void *data) {
         struct sway_cursor *cursor = wl_container_of(listener, cursor, tool_button);
         wlr_idle_notify_activity(server.idle, cursor->seat->wlr_seat);
         struct wlr_event_tablet_tool_button *event = data;
-        // TODO: the user may want to configure which tool buttons are mapped to
-        // which simulated pointer buttons
-        switch (event->state) {
-        case WLR_BUTTON_PRESSED:
-                if (cursor->tool_buttons == 0) {
-                        dispatch_cursor_button(cursor, event->device,
-                                        event->time_msec, BTN_RIGHT, event->state);
-                }
-                cursor->tool_buttons++;
-                break;
-        case WLR_BUTTON_RELEASED:
-                if (cursor->tool_buttons == 1) {
-                        dispatch_cursor_button(cursor, event->device,
-                                        event->time_msec, BTN_RIGHT, event->state);
+        struct sway_tablet_tool *sway_tool = event->tool->data;
+        struct wlr_tablet_v2_tablet *tablet_v2 = sway_tool->tablet->tablet_v2;
+        struct sway_seat *seat = cursor->seat;
+
+        if (!sway_tool) {
+                sway_log(SWAY_DEBUG, "tool button before proximity");
+                return;
+        }
+
+        double sx, sy;
+        struct wlr_surface *surface = NULL;
+
+        node_at_coords(seat, cursor->cursor->x, cursor->cursor->y,
+                &surface, &sx, &sy);
+
+        if (!surface || !wlr_surface_accepts_tablet_v2(tablet_v2, surface)) {
+                // TODO: the user may want to configure which tool buttons are mapped to
+                // which simulated pointer buttons
+                switch (event->state) {
+                case WLR_BUTTON_PRESSED:
+                        if (cursor->tool_buttons == 0) {
+                                dispatch_cursor_button(cursor, event->device,
+                                                event->time_msec, BTN_RIGHT, event->state);
+                        }
+                        cursor->tool_buttons++;
+                        break;
+                case WLR_BUTTON_RELEASED:
+                        if (cursor->tool_buttons == 1) {
+                                dispatch_cursor_button(cursor, event->device,
+                                                event->time_msec, BTN_RIGHT, event->state);
+                        }
+                        cursor->tool_buttons--;
+                        break;
                 }
-                cursor->tool_buttons--;
-                break;
+                wlr_seat_pointer_notify_frame(cursor->seat->wlr_seat);
+                transaction_commit_dirty();
+                return;
         }
-        wlr_seat_pointer_notify_frame(cursor->seat->wlr_seat);
-        transaction_commit_dirty();
+
+        wlr_tablet_v2_tablet_tool_notify_button(sway_tool->tablet_v2_tool,
+                (enum zwp_tablet_pad_v2_button_state)event->button,
+                (enum zwp_tablet_pad_v2_button_state)event->state);
 }
 
 static void check_constraint_region(struct sway_cursor *cursor) {
@@ -698,9 +852,6 @@ struct sway_cursor *sway_cursor_create(struct sway_seat *seat) {
                 &cursor->touch_motion);
         cursor->touch_motion.notify = handle_touch_motion;
 
-        // TODO: tablet protocol support
-        // Note: We should emulate pointer events for clients that don't support the
-        // tablet protocol when the time comes
         wl_signal_add(&wlr_cursor->events.tablet_tool_axis,
                 &cursor->tool_axis);
         cursor->tool_axis.notify = handle_tool_axis;
@@ -708,6 +859,9 @@ struct sway_cursor *sway_cursor_create(struct sway_seat *seat) {
         wl_signal_add(&wlr_cursor->events.tablet_tool_tip, &cursor->tool_tip);
         cursor->tool_tip.notify = handle_tool_tip;
 
+        wl_signal_add(&wlr_cursor->events.tablet_tool_proximity, &cursor->tool_proximity);
+        cursor->tool_proximity.notify = handle_tool_proximity;
+
         wl_signal_add(&wlr_cursor->events.tablet_tool_button, &cursor->tool_button);
         cursor->tool_button.notify = handle_tool_button;
 
@@ -716,6 +870,8 @@ struct sway_cursor *sway_cursor_create(struct sway_seat *seat) {
         cursor->request_set_cursor.notify = handle_request_set_cursor;
 
         wl_list_init(&cursor->constraint_commit.link);
+        wl_list_init(&cursor->tablets);
+        wl_list_init(&cursor->tablet_pads);
 
         cursor->cursor = wlr_cursor;
 
diff --git a/sway/input/seat.c b/sway/input/seat.c
index b2243fe3..ebd40343 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -8,6 +8,7 @@
 #include <wlr/types/wlr_data_device.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_primary_selection.h>
+#include <wlr/types/wlr_tablet_v2.h>
 #include <wlr/types/wlr_xcursor_manager.h>
 #include "config.h"
 #include "list.h"
@@ -18,6 +19,7 @@
 #include "sway/input/keyboard.h"
 #include "sway/input/seat.h"
 #include "sway/input/switch.h"
+#include "sway/input/tablet.h"
 #include "sway/ipc-server.h"
 #include "sway/layers.h"
 #include "sway/output.h"
@@ -34,6 +36,8 @@ static void seat_device_destroy(struct sway_seat_device *seat_device) {
         }
 
         sway_keyboard_destroy(seat_device->keyboard);
+        sway_tablet_destroy(seat_device->tablet);
+        sway_tablet_pad_destroy(seat_device->tablet_pad);
         wlr_cursor_detach_input_device(seat_device->sway_seat->cursor->cursor,
                 seat_device->input_device->wlr_device);
         wl_list_remove(&seat_device->link);
@@ -118,6 +122,14 @@ static void seat_keyboard_notify_enter(struct sway_seat *seat,
                         state->pressed_keycodes, state->npressed, &keyboard->modifiers);
 }
 
+static void seat_tablet_pads_notify_enter(struct sway_seat *seat,
+                struct wlr_surface *surface) {
+        struct sway_seat_device *seat_device;
+        wl_list_for_each(seat_device, &seat->devices, link) {
+                sway_tablet_pad_notify_enter(seat_device->tablet_pad, surface);
+        }
+}
+
 /**
  * If con is a view, set it as active and enable keyboard input.
  * If con is a container, set all child views as active and don't enable
@@ -138,6 +150,7 @@ static void seat_send_focus(struct sway_node *node, struct sway_seat *seat) {
 #endif
 
                 seat_keyboard_notify_enter(seat, view->surface);
+                seat_tablet_pads_notify_enter(seat, view->surface);
 
                 struct wlr_pointer_constraint_v1 *constraint =
                         wlr_pointer_constraints_v1_constraint_for_surface(
@@ -638,14 +651,23 @@ static void seat_configure_touch(struct sway_seat *seat,
 
 static void seat_configure_tablet_tool(struct sway_seat *seat,
                 struct sway_seat_device *sway_device) {
-        if ((seat->wlr_seat->capabilities & WL_SEAT_CAPABILITY_POINTER) == 0) {
-                seat_configure_xcursor(seat);
+        if (!sway_device->tablet) {
+                sway_device->tablet = sway_tablet_create(seat, sway_device);
         }
+        sway_configure_tablet(sway_device->tablet);
         wlr_cursor_attach_input_device(seat->cursor->cursor,
                 sway_device->input_device->wlr_device);
         seat_apply_input_config(seat, sway_device);
 }
 
+static void seat_configure_tablet_pad(struct sway_seat *seat,
+                struct sway_seat_device *sway_device) {
+        if (!sway_device->tablet) {
+                sway_device->tablet_pad = sway_tablet_pad_create(seat, sway_device);
+        }
+        sway_configure_tablet_pad(sway_device->tablet_pad);
+}
+
 static struct sway_seat_device *seat_get_device(struct sway_seat *seat,
                 struct sway_input_device *input_device) {
         struct sway_seat_device *seat_device = NULL;
@@ -682,7 +704,7 @@ void seat_configure_device(struct sway_seat *seat,
                         seat_configure_tablet_tool(seat, seat_device);
                         break;
                 case WLR_INPUT_DEVICE_TABLET_PAD:
-                        sway_log(SWAY_DEBUG, "TODO: configure tablet pad");
+                        seat_configure_tablet_pad(seat, seat_device);
                         break;
         }
 }
@@ -1079,6 +1101,7 @@ void seat_set_focus_surface(struct sway_seat *seat,
                 seat->has_focus = false;
         }
         seat_keyboard_notify_enter(seat, surface);
+        seat_tablet_pads_notify_enter(seat, surface);
 }
 
 void seat_set_focus_layer(struct sway_seat *seat,
diff --git a/sway/input/tablet.c b/sway/input/tablet.c
new file mode 100644
index 00000000..b0d4d0c6
--- /dev/null
+++ b/sway/input/tablet.c
@@ -0,0 +1,345 @@
+#define _POSIX_C_SOURCE 200809L
+#include <stdlib.h>
+#include <wlr/backend/libinput.h>
+#include <wlr/types/wlr_tablet_v2.h>
+#include "log.h"
+#include "sway/input/cursor.h"
+#include "sway/input/seat.h"
+#include "sway/input/tablet.h"
+
+static void handle_pad_tablet_destroy(struct wl_listener *listener, void *data) {
+        struct sway_tablet_pad *pad =
+                wl_container_of(listener, pad, tablet_destroy);
+
+        pad->tablet = NULL;
+
+        wl_list_remove(&pad->tablet_destroy.link);
+        wl_list_init(&pad->tablet_destroy.link);
+}
+
+static void attach_tablet_pad(struct sway_tablet_pad *tablet_pad,
+                struct sway_tablet *tablet) {
+        sway_log(SWAY_DEBUG, "Attaching tablet pad \"%s\" to tablet tool \"%s\"",
+                tablet_pad->seat_device->input_device->wlr_device->name,
+                tablet->seat_device->input_device->wlr_device->name);
+
+        tablet_pad->tablet = tablet;
+
+        wl_list_remove(&tablet_pad->tablet_destroy.link);
+        tablet_pad->tablet_destroy.notify = handle_pad_tablet_destroy;
+        wl_signal_add(&tablet->seat_device->input_device->wlr_device->events.destroy,
+                &tablet_pad->tablet_destroy);
+}
+
+struct sway_tablet *sway_tablet_create(struct sway_seat *seat,
+                struct sway_seat_device *device) {
+        struct sway_tablet *tablet =
+                calloc(1, sizeof(struct sway_tablet));
+        if (!sway_assert(tablet, "could not allocate sway tablet for seat")) {
+                return NULL;
+        }
+
+        wl_list_insert(&seat->cursor->tablets, &tablet->link);
+
+        device->tablet = tablet;
+        tablet->seat_device = device;
+
+        return tablet;
+}
+
+void sway_configure_tablet(struct sway_tablet *tablet) {
+        struct wlr_input_device *device =
+                tablet->seat_device->input_device->wlr_device;
+        struct sway_seat *seat = tablet->seat_device->sway_seat;
+
+        if ((seat->wlr_seat->capabilities & WL_SEAT_CAPABILITY_POINTER) == 0) {
+                seat_configure_xcursor(seat);
+        }
+
+        tablet->tablet_v2 =
+                wlr_tablet_create(server.tablet_v2, seat->wlr_seat, device);
+
+        /* Search for a sibling tablet pad */
+        if (!wlr_input_device_is_libinput(device)) {
+                /* We can only do this on libinput devices */
+                return;
+        }
+
+        struct libinput_device_group *group =
+                libinput_device_get_device_group(wlr_libinput_get_device_handle(device));
+        struct sway_tablet_pad *tablet_pad;
+        wl_list_for_each(tablet_pad, &seat->cursor->tablet_pads, link) {
+                struct wlr_input_device *pad_device =
+                        tablet_pad->seat_device->input_device->wlr_device;
+                if (!wlr_input_device_is_libinput(pad_device)) {
+                        continue;
+                }
+
+                struct libinput_device_group *pad_group =
+                        libinput_device_get_device_group(wlr_libinput_get_device_handle(pad_device));
+
+                if (pad_group == group) {
+                        attach_tablet_pad(tablet_pad, tablet);
+                        break;
+                }
+        }
+}
+
+void sway_tablet_destroy(struct sway_tablet *tablet) {
+        if (!tablet) {
+                return;
+        }
+        wl_list_remove(&tablet->link);
+        free(tablet);
+}
+
+static void handle_tablet_tool_set_cursor(struct wl_listener *listener, void *data) {
+        struct sway_tablet_tool *tool =
+                wl_container_of(listener, tool, set_cursor);
+        struct wlr_tablet_v2_event_cursor *event = data;
+
+        struct sway_cursor *cursor = tool->seat->cursor;
+        if (!seatop_allows_set_cursor(cursor->seat)) {
+                return;
+        }
+
+        struct wl_client *focused_client = NULL;
+        struct wlr_surface *focused_surface =
+                cursor->seat->wlr_seat->pointer_state.focused_surface;
+        if (focused_surface != NULL) {
+                focused_client = wl_resource_get_client(focused_surface->resource);
+        }
+
+        // TODO: check cursor mode
+        if (focused_client == NULL ||
+                        event->seat_client->client != focused_client) {
+                sway_log(SWAY_DEBUG, "denying request to set cursor from unfocused client");
+                return;
+        }
+
+        cursor_set_image_surface(cursor, event->surface, event->hotspot_x,
+                        event->hotspot_y, focused_client);
+}
+
+static void handle_tablet_tool_destroy(struct wl_listener *listener, void *data) {
+        struct sway_tablet_tool *tool =
+                wl_container_of(listener, tool, tool_destroy);
+
+        wl_list_remove(&tool->tool_destroy.link);
+        wl_list_remove(&tool->set_cursor.link);
+
+        free(tool);
+}
+
+void sway_tablet_tool_configure(struct sway_tablet *tablet,
+                struct wlr_tablet_tool *wlr_tool) {
+        struct sway_tablet_tool *tool =
+                calloc(1, sizeof(struct sway_tablet_tool));
+        if (!sway_assert(tool, "could not allocate sway tablet tool for tablet")) {
+                return;
+        }
+
+        tool->seat = tablet->seat_device->sway_seat;
+        tool->tablet = tablet;
+        tool->tablet_v2_tool =
+                wlr_tablet_tool_create(server.tablet_v2,
+                        tablet->seat_device->sway_seat->wlr_seat, wlr_tool);
+
+        tool->tool_destroy.notify = handle_tablet_tool_destroy;
+        wl_signal_add(&wlr_tool->events.destroy, &tool->tool_destroy);
+
+        tool->set_cursor.notify = handle_tablet_tool_set_cursor;
+        wl_signal_add(&tool->tablet_v2_tool->events.set_cursor,
+                &tool->set_cursor);
+
+        wlr_tool->data = tool;
+}
+
+static void handle_tablet_pad_attach(struct wl_listener *listener,
+                void *data) {
+        struct sway_tablet_pad *pad = wl_container_of(listener, pad, attach);
+        struct wlr_tablet_tool *wlr_tool = data;
+        struct sway_tablet_tool *tool = wlr_tool->data;
+
+        if (!tool) {
+                return;
+        }
+
+        attach_tablet_pad(pad, tool->tablet);
+}
+
+static void handle_tablet_pad_ring(struct wl_listener *listener, void *data) {
+        struct sway_tablet_pad *pad = wl_container_of(listener, pad, ring);
+        struct wlr_event_tablet_pad_ring *event = data;
+
+        if (!pad->current_surface) {
+                return;
+        }
+
+        wlr_tablet_v2_tablet_pad_notify_ring(pad->tablet_v2_pad,
+                event->ring, event->position,
+                event->source == WLR_TABLET_PAD_RING_SOURCE_FINGER,
+                event->time_msec);
+}
+
+static void handle_tablet_pad_strip(struct wl_listener *listener, void *data) {
+        struct sway_tablet_pad *pad = wl_container_of(listener, pad, strip);
+        struct wlr_event_tablet_pad_strip *event = data;
+
+        if (!pad->current_surface) {
+                return;
+        }
+
+        wlr_tablet_v2_tablet_pad_notify_strip(pad->tablet_v2_pad,
+                event->strip, event->position,
+                event->source == WLR_TABLET_PAD_STRIP_SOURCE_FINGER,
+                event->time_msec);
+}
+
+static void handle_tablet_pad_button(struct wl_listener *listener, void *data) {
+        struct sway_tablet_pad *pad = wl_container_of(listener, pad, button);
+        struct wlr_event_tablet_pad_button *event = data;
+
+        if (!pad->current_surface) {
+                return;
+        }
+
+        wlr_tablet_v2_tablet_pad_notify_mode(pad->tablet_v2_pad,
+                event->group, event->mode, event->time_msec);
+
+        wlr_tablet_v2_tablet_pad_notify_button(pad->tablet_v2_pad,
+                event->button, event->time_msec,
+                (enum zwp_tablet_pad_v2_button_state)event->state);
+}
+
+struct sway_tablet_pad *sway_tablet_pad_create(struct sway_seat *seat,
+                struct sway_seat_device *device) {
+        struct sway_tablet_pad *tablet_pad =
+                calloc(1, sizeof(struct sway_tablet_pad));
+        if (!sway_assert(tablet_pad, "could not allocate sway tablet")) {
+                return NULL;
+        }
+
+        tablet_pad->seat_device = device;
+        wl_list_init(&tablet_pad->attach.link);
+        wl_list_init(&tablet_pad->button.link);
+        wl_list_init(&tablet_pad->strip.link);
+        wl_list_init(&tablet_pad->ring.link);
+        wl_list_init(&tablet_pad->surface_destroy.link);
+        wl_list_init(&tablet_pad->tablet_destroy.link);
+
+        wl_list_insert(&seat->cursor->tablet_pads, &tablet_pad->link);
+
+        return tablet_pad;
+}
+
+void sway_configure_tablet_pad(struct sway_tablet_pad *tablet_pad) {
+        struct wlr_input_device *device =
+                tablet_pad->seat_device->input_device->wlr_device;
+        struct sway_seat *seat = tablet_pad->seat_device->sway_seat;
+
+        tablet_pad->tablet_v2_pad =
+                wlr_tablet_pad_create(server.tablet_v2, seat->wlr_seat, device);
+
+        wl_list_remove(&tablet_pad->attach.link);
+        tablet_pad->attach.notify = handle_tablet_pad_attach;
+        wl_signal_add(&device->tablet_pad->events.attach_tablet,
+                &tablet_pad->attach);
+
+        wl_list_remove(&tablet_pad->button.link);
+        tablet_pad->button.notify = handle_tablet_pad_button;
+        wl_signal_add(&device->tablet_pad->events.button, &tablet_pad->button);
+
+        wl_list_remove(&tablet_pad->strip.link);
+        tablet_pad->strip.notify = handle_tablet_pad_strip;
+        wl_signal_add(&device->tablet_pad->events.strip, &tablet_pad->strip);
+
+        wl_list_remove(&tablet_pad->ring.link);
+        tablet_pad->ring.notify = handle_tablet_pad_ring;
+        wl_signal_add(&device->tablet_pad->events.ring, &tablet_pad->ring);
+
+        /* Search for a sibling tablet */
+        if (!wlr_input_device_is_libinput(device)) {
+                /* We can only do this on libinput devices */
+                return;
+        }
+
+        struct libinput_device_group *group =
+                libinput_device_get_device_group(wlr_libinput_get_device_handle(device));
+        struct sway_tablet *tool;
+        wl_list_for_each(tool, &seat->cursor->tablets, link) {
+                struct wlr_input_device *tablet =
+                        tool->seat_device->input_device->wlr_device;
+                if (!wlr_input_device_is_libinput(tablet)) {
+                        continue;
+                }
+
+                struct libinput_device_group *tablet_group =
+                        libinput_device_get_device_group(wlr_libinput_get_device_handle(tablet));
+
+                if (tablet_group == group) {
+                        attach_tablet_pad(tablet_pad, tool);
+                        break;
+                }
+        }
+}
+
+void sway_tablet_pad_destroy(struct sway_tablet_pad *tablet_pad) {
+        if (!tablet_pad) {
+                return;
+        }
+
+        wl_list_remove(&tablet_pad->link);
+        wl_list_remove(&tablet_pad->attach.link);
+        wl_list_remove(&tablet_pad->button.link);
+        wl_list_remove(&tablet_pad->strip.link);
+        wl_list_remove(&tablet_pad->ring.link);
+        wl_list_remove(&tablet_pad->surface_destroy.link);
+        wl_list_remove(&tablet_pad->tablet_destroy.link);
+
+        free(tablet_pad);
+}
+
+static void handle_pad_tablet_surface_destroy(struct wl_listener *listener,
+                void *data) {
+        struct sway_tablet_pad *tablet_pad =
+                wl_container_of(listener, tablet_pad, surface_destroy);
+
+        wlr_tablet_v2_tablet_pad_notify_leave(tablet_pad->tablet_v2_pad,
+                tablet_pad->current_surface);
+        wl_list_remove(&tablet_pad->surface_destroy.link);
+        wl_list_init(&tablet_pad->surface_destroy.link);
+        tablet_pad->current_surface = NULL;
+}
+
+void sway_tablet_pad_notify_enter(struct sway_tablet_pad *tablet_pad,
+                struct wlr_surface *surface) {
+        if (!tablet_pad || !tablet_pad->tablet) {
+                return;
+        }
+
+        if (surface == tablet_pad->current_surface) {
+                return;
+        }
+
+        /* Leave current surface */
+        if (tablet_pad->current_surface) {
+                wlr_tablet_v2_tablet_pad_notify_leave(tablet_pad->tablet_v2_pad,
+                        tablet_pad->current_surface);
+                wl_list_remove(&tablet_pad->surface_destroy.link);
+                wl_list_init(&tablet_pad->surface_destroy.link);
+                tablet_pad->current_surface = NULL;
+        }
+
+        if (!wlr_surface_accepts_tablet_v2(tablet_pad->tablet->tablet_v2, surface)) {
+                return;
+        }
+
+        wlr_tablet_v2_tablet_pad_notify_enter(tablet_pad->tablet_v2_pad,
+                tablet_pad->tablet->tablet_v2, surface);
+
+        tablet_pad->current_surface = surface;
+        wl_list_remove(&tablet_pad->surface_destroy.link);
+        tablet_pad->surface_destroy.notify = handle_pad_tablet_surface_destroy;
+        wl_signal_add(&surface->events.destroy, &tablet_pad->surface_destroy);
+}
diff --git a/sway/meson.build b/sway/meson.build
index 4783c58f..24628100 100644
--- a/sway/meson.build
+++ b/sway/meson.build
@@ -31,6 +31,7 @@ sway_sources = files(
         'input/seatop_resize_floating.c',
         'input/seatop_resize_tiling.c',
         'input/switch.c',
+        'input/tablet.c',
 
         'config/bar.c',
         'config/output.c',
diff --git a/sway/server.c b/sway/server.c
index aee2cc87..e2d54947 100644
--- a/sway/server.c
+++ b/sway/server.c
@@ -19,6 +19,7 @@
 #include <wlr/types/wlr_relative_pointer_v1.h>
 #include <wlr/types/wlr_screencopy_v1.h>
 #include <wlr/types/wlr_server_decoration.h>
+#include <wlr/types/wlr_tablet_v2.h>
 #include <wlr/types/wlr_xcursor_manager.h>
 #include <wlr/types/wlr_xdg_decoration_v1.h>
 #include <wlr/types/wlr_xdg_output_v1.h>
@@ -86,6 +87,8 @@ bool server_init(struct sway_server *server) {
                 &server->xdg_shell_surface);
         server->xdg_shell_surface.notify = handle_xdg_shell_surface;
 
+        server->tablet_v2 = wlr_tablet_v2_create(server->wl_display);
+
         server->server_decoration_manager =
                 wlr_server_decoration_manager_create(server->wl_display);
         wlr_server_decoration_manager_set_default_mode(