wlroots-hyprland/backend/x11/input_device.c

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#include <stdlib.h>
#include <wlr/config.h>
#include <linux/input-event-codes.h>
#include <wayland-server-protocol.h>
#include <xcb/xcb.h>
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#include <xcb/xfixes.h>
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#include <xcb/xinput.h>
#include <wlr/interfaces/wlr_input_device.h>
#include <wlr/interfaces/wlr_keyboard.h>
#include <wlr/interfaces/wlr_pointer.h>
#include <wlr/interfaces/wlr_touch.h>
#include <wlr/util/log.h>
#include "backend/x11.h"
#include "util/signal.h"
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static void send_key_event(struct wlr_x11_backend *x11, uint32_t key,
enum wl_keyboard_key_state st, xcb_timestamp_t time) {
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struct wlr_event_keyboard_key ev = {
.time_msec = time,
.keycode = key,
.state = st,
.update_state = true,
};
wlr_keyboard_notify_key(&x11->keyboard, &ev);
}
static void send_button_event(struct wlr_x11_output *output, uint32_t key,
enum wlr_button_state st, xcb_timestamp_t time) {
struct wlr_event_pointer_button ev = {
.device = &output->pointer.base,
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.time_msec = time,
.button = key,
.state = st,
};
wlr_signal_emit_safe(&output->pointer.events.button, &ev);
wlr_signal_emit_safe(&output->pointer.events.frame, &output->pointer);
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}
static void send_axis_event(struct wlr_x11_output *output, int32_t delta,
xcb_timestamp_t time) {
struct wlr_event_pointer_axis ev = {
.device = &output->pointer.base,
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.time_msec = time,
.source = WLR_AXIS_SOURCE_WHEEL,
.orientation = WLR_AXIS_ORIENTATION_VERTICAL,
// 15 is a typical value libinput sends for one scroll
.delta = delta * 15,
.delta_discrete = delta,
};
wlr_signal_emit_safe(&output->pointer.events.axis, &ev);
wlr_signal_emit_safe(&output->pointer.events.frame, &output->pointer);
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}
static void send_pointer_position_event(struct wlr_x11_output *output,
int16_t x, int16_t y, xcb_timestamp_t time) {
struct wlr_event_pointer_motion_absolute ev = {
.device = &output->pointer.base,
.time_msec = time,
.x = (double)x / output->wlr_output.width,
.y = (double)y / output->wlr_output.height,
};
wlr_signal_emit_safe(&output->pointer.events.motion_absolute, &ev);
wlr_signal_emit_safe(&output->pointer.events.frame, &output->pointer);
}
static void send_touch_down_event(struct wlr_x11_output *output,
int16_t x, int16_t y, int32_t touch_id, xcb_timestamp_t time) {
struct wlr_event_touch_down ev = {
.device = &output->touch.base,
.time_msec = time,
.x = (double)x / output->wlr_output.width,
.y = (double)y / output->wlr_output.height,
.touch_id = touch_id,
};
wlr_signal_emit_safe(&output->touch.events.down, &ev);
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wlr_signal_emit_safe(&output->touch.events.frame, NULL);
}
static void send_touch_motion_event(struct wlr_x11_output *output,
int16_t x, int16_t y, int32_t touch_id, xcb_timestamp_t time) {
struct wlr_event_touch_motion ev = {
.device = &output->touch.base,
.time_msec = time,
.x = (double)x / output->wlr_output.width,
.y = (double)y / output->wlr_output.height,
.touch_id = touch_id,
};
wlr_signal_emit_safe(&output->touch.events.motion, &ev);
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wlr_signal_emit_safe(&output->touch.events.frame, NULL);
}
static void send_touch_up_event(struct wlr_x11_output *output,
int32_t touch_id, xcb_timestamp_t time) {
struct wlr_event_touch_up ev = {
.device = &output->touch.base,
.time_msec = time,
.touch_id = touch_id,
};
wlr_signal_emit_safe(&output->touch.events.up, &ev);
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wlr_signal_emit_safe(&output->touch.events.frame, NULL);
}
static struct wlr_x11_touchpoint *get_touchpoint_from_x11_touch_id(
struct wlr_x11_output *output, uint32_t id) {
struct wlr_x11_touchpoint *touchpoint;
wl_list_for_each(touchpoint, &output->touchpoints, link) {
if (touchpoint->x11_id == id) {
return touchpoint;
}
}
return NULL;
}
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void handle_x11_xinput_event(struct wlr_x11_backend *x11,
xcb_ge_generic_event_t *event) {
struct wlr_x11_output *output;
switch (event->event_type) {
case XCB_INPUT_KEY_PRESS: {
xcb_input_key_press_event_t *ev =
(xcb_input_key_press_event_t *)event;
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if (ev->flags & XCB_INPUT_KEY_EVENT_FLAGS_KEY_REPEAT) {
return;
}
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wlr_keyboard_notify_modifiers(&x11->keyboard, ev->mods.base,
ev->mods.latched, ev->mods.locked, ev->mods.effective);
send_key_event(x11, ev->detail - 8, WL_KEYBOARD_KEY_STATE_PRESSED, ev->time);
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x11->time = ev->time;
break;
}
case XCB_INPUT_KEY_RELEASE: {
xcb_input_key_release_event_t *ev =
(xcb_input_key_release_event_t *)event;
wlr_keyboard_notify_modifiers(&x11->keyboard, ev->mods.base,
ev->mods.latched, ev->mods.locked, ev->mods.effective);
send_key_event(x11, ev->detail - 8, WL_KEYBOARD_KEY_STATE_RELEASED, ev->time);
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x11->time = ev->time;
break;
}
case XCB_INPUT_BUTTON_PRESS: {
xcb_input_button_press_event_t *ev =
(xcb_input_button_press_event_t *)event;
output = get_x11_output_from_window_id(x11, ev->event);
if (!output) {
return;
}
switch (ev->detail) {
case XCB_BUTTON_INDEX_1:
send_button_event(output, BTN_LEFT, WLR_BUTTON_PRESSED,
ev->time);
break;
case XCB_BUTTON_INDEX_2:
send_button_event(output, BTN_MIDDLE, WLR_BUTTON_PRESSED,
ev->time);
break;
case XCB_BUTTON_INDEX_3:
send_button_event(output, BTN_RIGHT, WLR_BUTTON_PRESSED,
ev->time);
break;
case XCB_BUTTON_INDEX_4:
send_axis_event(output, -1, ev->time);
break;
case XCB_BUTTON_INDEX_5:
send_axis_event(output, 1, ev->time);
break;
}
x11->time = ev->time;
break;
}
case XCB_INPUT_BUTTON_RELEASE: {
xcb_input_button_release_event_t *ev =
(xcb_input_button_release_event_t *)event;
output = get_x11_output_from_window_id(x11, ev->event);
if (!output) {
return;
}
switch (ev->detail) {
case XCB_BUTTON_INDEX_1:
send_button_event(output, BTN_LEFT, WLR_BUTTON_RELEASED,
ev->time);
break;
case XCB_BUTTON_INDEX_2:
send_button_event(output, BTN_MIDDLE, WLR_BUTTON_RELEASED,
ev->time);
break;
case XCB_BUTTON_INDEX_3:
send_button_event(output, BTN_RIGHT, WLR_BUTTON_RELEASED,
ev->time);
break;
}
x11->time = ev->time;
break;
}
case XCB_INPUT_MOTION: {
xcb_input_motion_event_t *ev = (xcb_input_motion_event_t *)event;
output = get_x11_output_from_window_id(x11, ev->event);
if (!output) {
return;
}
send_pointer_position_event(output, ev->event_x >> 16,
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ev->event_y >> 16, ev->time);
x11->time = ev->time;
break;
}
case XCB_INPUT_TOUCH_BEGIN: {
xcb_input_touch_begin_event_t *ev = (xcb_input_touch_begin_event_t *)event;
output = get_x11_output_from_window_id(x11, ev->event);
if (!output) {
return;
}
int32_t id = 0;
if (!wl_list_empty(&output->touchpoints)) {
struct wlr_x11_touchpoint *last_touchpoint = wl_container_of(
output->touchpoints.next, last_touchpoint, link);
id = last_touchpoint->wayland_id + 1;
}
struct wlr_x11_touchpoint *touchpoint = calloc(1, sizeof(struct wlr_x11_touchpoint));
touchpoint->x11_id = ev->detail;
touchpoint->wayland_id = id;
wl_list_init(&touchpoint->link);
wl_list_insert(&output->touchpoints, &touchpoint->link);
send_touch_down_event(output, ev->event_x >> 16,
ev->event_y >> 16, touchpoint->wayland_id, ev->time);
x11->time = ev->time;
break;
}
case XCB_INPUT_TOUCH_END: {
xcb_input_touch_end_event_t *ev = (xcb_input_touch_end_event_t *)event;
output = get_x11_output_from_window_id(x11, ev->event);
if (!output) {
return;
}
struct wlr_x11_touchpoint *touchpoint = get_touchpoint_from_x11_touch_id(output, ev->detail);
if (!touchpoint) {
return;
}
send_touch_up_event(output, touchpoint->wayland_id, ev->time);
x11->time = ev->time;
wl_list_remove(&touchpoint->link);
free(touchpoint);
break;
}
case XCB_INPUT_TOUCH_UPDATE: {
xcb_input_touch_update_event_t *ev = (xcb_input_touch_update_event_t *)event;
output = get_x11_output_from_window_id(x11, ev->event);
if (!output) {
return;
}
struct wlr_x11_touchpoint *touchpoint = get_touchpoint_from_x11_touch_id(output, ev->detail);
if (!touchpoint) {
return;
}
send_touch_motion_event(output, ev->event_x >> 16,
ev->event_y >> 16, touchpoint->wayland_id, ev->time);
x11->time = ev->time;
break;
}
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}
}
static void input_device_destroy(struct wlr_input_device *wlr_device) {
// Don't free the input device, it's on the stack
}
const struct wlr_input_device_impl input_device_impl = {
.destroy = input_device_destroy,
};
static void keyboard_destroy(struct wlr_keyboard *wlr_keyboard) {
// Don't free the keyboard, it's on the stack
}
const struct wlr_keyboard_impl keyboard_impl = {
.destroy = keyboard_destroy,
};
static void pointer_destroy(struct wlr_pointer *wlr_pointer) {
// Don't free the pointer, it's on the stack
}
const struct wlr_pointer_impl pointer_impl = {
.destroy = pointer_destroy,
};
static void touch_destroy(struct wlr_touch *wlr_touch) {
// Don't free the touch, it's on the stack
}
const struct wlr_touch_impl touch_impl = {
.destroy = touch_destroy,
};
void update_x11_pointer_position(struct wlr_x11_output *output,
xcb_timestamp_t time) {
struct wlr_x11_backend *x11 = output->x11;
xcb_query_pointer_cookie_t cookie =
xcb_query_pointer(x11->xcb, output->win);
xcb_query_pointer_reply_t *reply =
xcb_query_pointer_reply(x11->xcb, cookie, NULL);
if (!reply) {
return;
}
send_pointer_position_event(output, reply->win_x, reply->win_y, time);
free(reply);
}
bool wlr_input_device_is_x11(struct wlr_input_device *wlr_dev) {
switch (wlr_dev->type) {
case WLR_INPUT_DEVICE_KEYBOARD:
return wlr_dev->keyboard->impl == &keyboard_impl;
case WLR_INPUT_DEVICE_POINTER:
return wlr_dev->pointer->impl == &pointer_impl;
case WLR_INPUT_DEVICE_TOUCH:
return wlr_dev->touch->impl == &touch_impl;
default:
return wlr_dev->impl == &input_device_impl;
}
}