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wlroots-hyprland/backend/libinput/events.c
Markus Ongyerth 000b305ecc backend/libinput: Manage tablet tool livetimes 
This adds the management code to manage tablet tools lifetimes from
libinput.
It follows the suggestion made in the tablet-unstable-v2.xml to destroy
tablet_tools once all tablets that it got into contact with were removed
from the system. This is implemented via a refcount.

If a tool is *not* unique, it will be destroyed on proximity out. This
is libinput specific and mentioned in libinput docs that tools will not
be found again, so we shouldn't keep a reference to them.
Also they can't be on other tablets as well, because they cannot be
tracked.

The naming in this commit is a bit off (to not break things).
The wlr names stay the same, tablet_tool is the libinput_device with
capaiblity LIBINPUT_DEVICE_CAP_TABLET_TOOL which is more akin to
"tablet" in the tablet-unstable-v2 protocol.
The struct that corresponds to the tablet_tool in tablet-unstable-v2 is
called tablet_tool_tool, a rename should be done at some point in the
future.
2018-07-14 09:40:39 +02:00

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#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <libinput.h>
#include <stdlib.h>
#include <wayland-util.h>
#include <wlr/backend/session.h>
#include <wlr/interfaces/wlr_input_device.h>
#include <wlr/util/log.h>
#include "backend/libinput.h"
#include "util/signal.h"
struct wlr_input_device *get_appropriate_device(
enum wlr_input_device_type desired_type,
struct libinput_device *libinput_dev) {
struct wl_list *wlr_devices = libinput_device_get_user_data(libinput_dev);
if (!wlr_devices) {
return NULL;
}
struct wlr_input_device *dev;
wl_list_for_each(dev, wlr_devices, link) {
if (dev->type == desired_type) {
return dev;
}
}
return NULL;
}
static void input_device_destroy(struct wlr_input_device *_dev) {
struct wlr_libinput_input_device *dev = (struct wlr_libinput_input_device *)_dev;
libinput_device_unref(dev->handle);
wl_list_remove(&dev->wlr_input_device.link);
free(dev);
}
static const struct wlr_input_device_impl input_device_impl = {
.destroy = input_device_destroy,
};
static struct wlr_input_device *allocate_device(
struct wlr_libinput_backend *backend, struct libinput_device *libinput_dev,
struct wl_list *wlr_devices, enum wlr_input_device_type type) {
int vendor = libinput_device_get_id_vendor(libinput_dev);
int product = libinput_device_get_id_product(libinput_dev);
const char *name = libinput_device_get_name(libinput_dev);
struct wlr_libinput_input_device *wlr_libinput_dev;
if (!(wlr_libinput_dev = calloc(1, sizeof(struct wlr_libinput_input_device)))) {
return NULL;
}
struct wlr_input_device *wlr_dev = &wlr_libinput_dev->wlr_input_device;
libinput_device_get_size(libinput_dev,
&wlr_dev->width_mm, &wlr_dev->height_mm);
const char *output_name = libinput_device_get_output_name(libinput_dev);
if (output_name != NULL) {
wlr_dev->output_name = strdup(output_name);
}
wl_list_insert(wlr_devices, &wlr_dev->link);
wlr_libinput_dev->handle = libinput_dev;
libinput_device_ref(libinput_dev);
wlr_input_device_init(wlr_dev, type, &input_device_impl,
name, vendor, product);
return wlr_dev;
}
bool wlr_input_device_is_libinput(struct wlr_input_device *wlr_dev) {
return wlr_dev->impl == &input_device_impl;
}
static void handle_device_added(struct wlr_libinput_backend *backend,
struct libinput_device *libinput_dev) {
assert(backend && libinput_dev);
/*
* Note: the wlr API exposes only devices with a single capability, because
* that meshes better with how Wayland does things and is a bit simpler.
* However, libinput devices often have multiple capabilities - in such
* cases we have to create several devices.
*/
int vendor = libinput_device_get_id_vendor(libinput_dev);
int product = libinput_device_get_id_product(libinput_dev);
const char *name = libinput_device_get_name(libinput_dev);
struct wl_list *wlr_devices = calloc(1, sizeof(struct wl_list));
if (!wlr_devices) {
wlr_log(WLR_ERROR, "Allocation failed");
return;
}
wl_list_init(wlr_devices);
wlr_log(WLR_DEBUG, "Added %s [%d:%d]", name, vendor, product);
if (libinput_device_has_capability(libinput_dev, LIBINPUT_DEVICE_CAP_KEYBOARD)) {
struct wlr_input_device *wlr_dev = allocate_device(backend,
libinput_dev, wlr_devices, WLR_INPUT_DEVICE_KEYBOARD);
if (!wlr_dev) {
goto fail;
}
wlr_dev->keyboard = create_libinput_keyboard(libinput_dev);
if (!wlr_dev->keyboard) {
free(wlr_dev);
goto fail;
}
wlr_signal_emit_safe(&backend->backend.events.new_input, wlr_dev);
}
if (libinput_device_has_capability(libinput_dev, LIBINPUT_DEVICE_CAP_POINTER)) {
struct wlr_input_device *wlr_dev = allocate_device(backend,
libinput_dev, wlr_devices, WLR_INPUT_DEVICE_POINTER);
if (!wlr_dev) {
goto fail;
}
wlr_dev->pointer = create_libinput_pointer(libinput_dev);
if (!wlr_dev->pointer) {
free(wlr_dev);
goto fail;
}
wlr_signal_emit_safe(&backend->backend.events.new_input, wlr_dev);
}
if (libinput_device_has_capability(libinput_dev, LIBINPUT_DEVICE_CAP_TOUCH)) {
struct wlr_input_device *wlr_dev = allocate_device(backend,
libinput_dev, wlr_devices, WLR_INPUT_DEVICE_TOUCH);
if (!wlr_dev) {
goto fail;
}
wlr_dev->touch = create_libinput_touch(libinput_dev);
if (!wlr_dev->touch) {
free(wlr_dev);
goto fail;
}
wlr_signal_emit_safe(&backend->backend.events.new_input, wlr_dev);
}
if (libinput_device_has_capability(libinput_dev, LIBINPUT_DEVICE_CAP_TABLET_TOOL)) {
struct wlr_input_device *wlr_dev = allocate_device(backend,
libinput_dev, wlr_devices, WLR_INPUT_DEVICE_TABLET_TOOL);
if (!wlr_dev) {
goto fail;
}
wlr_dev->tablet_tool = create_libinput_tablet_tool(libinput_dev);
if (!wlr_dev->tablet_tool) {
free(wlr_dev);
goto fail;
}
wlr_signal_emit_safe(&backend->backend.events.new_input, wlr_dev);
}
if (libinput_device_has_capability(libinput_dev, LIBINPUT_DEVICE_CAP_TABLET_PAD)) {
struct wlr_input_device *wlr_dev = allocate_device(backend,
libinput_dev, wlr_devices, WLR_INPUT_DEVICE_TABLET_PAD);
if (!wlr_dev) {
goto fail;
}
wlr_dev->tablet_pad = create_libinput_tablet_pad(libinput_dev);
if (!wlr_dev->tablet_pad) {
free(wlr_dev);
goto fail;
}
wlr_signal_emit_safe(&backend->backend.events.new_input, wlr_dev);
}
if (libinput_device_has_capability(libinput_dev, LIBINPUT_DEVICE_CAP_GESTURE)) {
// TODO
}
if (libinput_device_has_capability(libinput_dev, LIBINPUT_DEVICE_CAP_SWITCH)) {
// TODO
}
if (wl_list_length(wlr_devices) > 0) {
libinput_device_set_user_data(libinput_dev, wlr_devices);
wlr_list_push(&backend->wlr_device_lists, wlr_devices);
} else {
free(wlr_devices);
}
return;
fail:
wlr_log(WLR_ERROR, "Could not allocate new device");
struct wlr_input_device *dev, *tmp_dev;
wl_list_for_each_safe(dev, tmp_dev, wlr_devices, link) {
free(dev);
}
free(wlr_devices);
}
static void handle_device_removed(struct wlr_libinput_backend *backend,
struct libinput_device *libinput_dev) {
struct wl_list *wlr_devices = libinput_device_get_user_data(libinput_dev);
int vendor = libinput_device_get_id_vendor(libinput_dev);
int product = libinput_device_get_id_product(libinput_dev);
const char *name = libinput_device_get_name(libinput_dev);
wlr_log(WLR_DEBUG, "Removing %s [%d:%d]", name, vendor, product);
if (!wlr_devices) {
return;
}
struct wlr_input_device *dev, *tmp_dev;
wl_list_for_each_safe(dev, tmp_dev, wlr_devices, link) {
if (dev->type == WLR_INPUT_DEVICE_TABLET_TOOL) {
wlr_libinput_tablet_tool_destroy(dev);
}
wlr_input_device_destroy(dev);
}
for (size_t i = 0; i < backend->wlr_device_lists.length; i++) {
if (backend->wlr_device_lists.items[i] == wlr_devices) {
wlr_list_del(&backend->wlr_device_lists, i);
break;
}
}
free(wlr_devices);
}
void handle_libinput_event(struct wlr_libinput_backend *backend,
struct libinput_event *event) {
assert(backend && event);
struct libinput_device *libinput_dev = libinput_event_get_device(event);
enum libinput_event_type event_type = libinput_event_get_type(event);
switch (event_type) {
case LIBINPUT_EVENT_DEVICE_ADDED:
handle_device_added(backend, libinput_dev);
break;
case LIBINPUT_EVENT_DEVICE_REMOVED:
handle_device_removed(backend, libinput_dev);
break;
case LIBINPUT_EVENT_KEYBOARD_KEY:
handle_keyboard_key(event, libinput_dev);
break;
case LIBINPUT_EVENT_POINTER_MOTION:
handle_pointer_motion(event, libinput_dev);
break;
case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
handle_pointer_motion_abs(event, libinput_dev);
break;
case LIBINPUT_EVENT_POINTER_BUTTON:
handle_pointer_button(event, libinput_dev);
break;
case LIBINPUT_EVENT_POINTER_AXIS:
handle_pointer_axis(event, libinput_dev);
break;
case LIBINPUT_EVENT_TOUCH_DOWN:
handle_touch_down(event, libinput_dev);
break;
case LIBINPUT_EVENT_TOUCH_UP:
handle_touch_up(event, libinput_dev);
break;
case LIBINPUT_EVENT_TOUCH_MOTION:
handle_touch_motion(event, libinput_dev);
break;
case LIBINPUT_EVENT_TOUCH_CANCEL:
handle_touch_cancel(event, libinput_dev);
break;
case LIBINPUT_EVENT_TOUCH_FRAME:
// no-op (at least for now)
break;
case LIBINPUT_EVENT_TABLET_TOOL_AXIS:
handle_tablet_tool_axis(event, libinput_dev);
break;
case LIBINPUT_EVENT_TABLET_TOOL_PROXIMITY:
handle_tablet_tool_proximity(event, libinput_dev);
break;
case LIBINPUT_EVENT_TABLET_TOOL_TIP:
handle_tablet_tool_tip(event, libinput_dev);
break;
case LIBINPUT_EVENT_TABLET_TOOL_BUTTON:
handle_tablet_tool_button(event, libinput_dev);
break;
case LIBINPUT_EVENT_TABLET_PAD_BUTTON:
handle_tablet_pad_button(event, libinput_dev);
break;
case LIBINPUT_EVENT_TABLET_PAD_RING:
handle_tablet_pad_ring(event, libinput_dev);
break;
case LIBINPUT_EVENT_TABLET_PAD_STRIP:
handle_tablet_pad_strip(event, libinput_dev);
break;
default:
wlr_log(WLR_DEBUG, "Unknown libinput event %d", event_type);
break;
}
}
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