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seat.c
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seat.c
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/*
* Cage: A Wayland kiosk.
*
* Copyright (C) 2018-2020 Jente Hidskes
*
* See the LICENSE file accompanying this file.
*/
#define _POSIX_C_SOURCE 200809L
#include "config.h"
#include <assert.h>
#include <linux/input-event-codes.h>
#include <stdlib.h>
#include <string.h>
#include <wayland-server-core.h>
#include <wlr/backend.h>
#include <wlr/backend/multi.h>
#include <wlr/backend/session.h>
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_data_device.h>
#include <wlr/types/wlr_idle_notify_v1.h>
#include <wlr/types/wlr_keyboard_group.h>
#include <wlr/types/wlr_primary_selection.h>
#include <wlr/types/wlr_relative_pointer_v1.h>
#include <wlr/types/wlr_scene.h>
#include <wlr/types/wlr_seat.h>
#include <wlr/types/wlr_touch.h>
#include <wlr/types/wlr_virtual_keyboard_v1.h>
#include <wlr/types/wlr_virtual_pointer_v1.h>
#include <wlr/types/wlr_xcursor_manager.h>
#include <wlr/util/log.h>
#include <wlr/util/region.h>
#if CAGE_HAS_XWAYLAND
#include <wlr/xwayland.h>
#endif
#include "output.h"
#include "seat.h"
#include "server.h"
#include "view.h"
#if CAGE_HAS_XWAYLAND
#include "xwayland.h"
#endif
static void drag_icon_update_position(struct cg_drag_icon *drag_icon);
/* XDG toplevels may have nested surfaces, such as popup windows for context
* menus or tooltips. This function tests if any of those are underneath the
* coordinates lx and ly (in output Layout Coordinates). If so, it sets the
* surface pointer to that wlr_surface and the sx and sy coordinates to the
* coordinates relative to that surface's top-left corner.
*
* This function iterates over all of our surfaces and attempts to find one
* under the cursor. If desktop_view_at returns a view, there is also a
* surface. There cannot be a surface without a view, either. It's both or
* nothing.
*/
static struct cg_view *
desktop_view_at(struct cg_server *server, double lx, double ly, struct wlr_surface **surface, double *sx, double *sy)
{
struct wlr_scene_node *node = wlr_scene_node_at(&server->scene->tree.node, lx, ly, sx, sy);
if (node == NULL || node->type != WLR_SCENE_NODE_BUFFER) {
return NULL;
}
struct wlr_scene_buffer *scene_buffer = wlr_scene_buffer_from_node(node);
struct wlr_scene_surface *scene_surface = wlr_scene_surface_try_from_buffer(scene_buffer);
if (!scene_surface) {
return NULL;
}
*surface = scene_surface->surface;
/* Walk up the tree until we find a node with a data pointer. When done,
* we've found the node representing the view. */
while (!node->data) {
if (!node->parent) {
node = NULL;
break;
}
node = &node->parent->node;
}
assert(node != NULL);
return node->data;
}
static void
press_cursor_button(struct cg_seat *seat, struct wlr_input_device *device, uint32_t time, uint32_t button,
uint32_t state, double lx, double ly)
{
struct cg_server *server = seat->server;
if (state == WLR_BUTTON_PRESSED) {
double sx, sy;
struct wlr_surface *surface;
struct cg_view *view = desktop_view_at(server, lx, ly, &surface, &sx, &sy);
struct cg_view *current = seat_get_focus(seat);
if (view == current) {
return;
}
/* Focus that client if the button was pressed and
it has no open dialogs. */
if (view && !view_is_transient_for(current, view)) {
seat_set_focus(seat, view);
}
}
}
static void
update_capabilities(struct cg_seat *seat)
{
uint32_t caps = 0;
if (!wl_list_empty(&seat->keyboard_groups)) {
caps |= WL_SEAT_CAPABILITY_KEYBOARD;
}
if (!wl_list_empty(&seat->pointers)) {
caps |= WL_SEAT_CAPABILITY_POINTER;
}
if (!wl_list_empty(&seat->touch)) {
caps |= WL_SEAT_CAPABILITY_TOUCH;
}
wlr_seat_set_capabilities(seat->seat, caps);
/* Hide cursor if the seat doesn't have pointer capability. */
if ((caps & WL_SEAT_CAPABILITY_POINTER) == 0) {
wlr_cursor_unset_image(seat->cursor);
} else {
wlr_cursor_set_xcursor(seat->cursor, seat->xcursor_manager, DEFAULT_XCURSOR);
}
}
static void
map_input_device_to_output(struct cg_seat *seat, struct wlr_input_device *device, const char *output_name)
{
if (!output_name) {
wlr_log(WLR_INFO, "Input device %s cannot be mapped to an output device\n", device->name);
return;
}
struct cg_output *output;
wl_list_for_each (output, &seat->server->outputs, link) {
if (strcmp(output_name, output->wlr_output->name) == 0) {
wlr_log(WLR_INFO, "Mapping input device %s to output device %s\n", device->name,
output->wlr_output->name);
wlr_cursor_map_input_to_output(seat->cursor, device, output->wlr_output);
return;
}
}
wlr_log(WLR_INFO, "Couldn't map input device %s to an output\n", device->name);
}
static void
handle_touch_destroy(struct wl_listener *listener, void *data)
{
struct cg_touch *touch = wl_container_of(listener, touch, destroy);
struct cg_seat *seat = touch->seat;
wl_list_remove(&touch->link);
wlr_cursor_detach_input_device(seat->cursor, &touch->touch->base);
wl_list_remove(&touch->destroy.link);
free(touch);
update_capabilities(seat);
}
static void
handle_new_touch(struct cg_seat *seat, struct wlr_touch *wlr_touch)
{
struct cg_touch *touch = calloc(1, sizeof(struct cg_touch));
if (!touch) {
wlr_log(WLR_ERROR, "Cannot allocate touch");
return;
}
touch->seat = seat;
touch->touch = wlr_touch;
wlr_cursor_attach_input_device(seat->cursor, &wlr_touch->base);
wl_list_insert(&seat->touch, &touch->link);
touch->destroy.notify = handle_touch_destroy;
wl_signal_add(&wlr_touch->base.events.destroy, &touch->destroy);
map_input_device_to_output(seat, &wlr_touch->base, wlr_touch->output_name);
}
static void
handle_pointer_destroy(struct wl_listener *listener, void *data)
{
struct cg_pointer *pointer = wl_container_of(listener, pointer, destroy);
struct cg_seat *seat = pointer->seat;
wl_list_remove(&pointer->link);
wlr_cursor_detach_input_device(seat->cursor, &pointer->pointer->base);
wl_list_remove(&pointer->destroy.link);
free(pointer);
update_capabilities(seat);
}
static void
handle_new_pointer(struct cg_seat *seat, struct wlr_pointer *wlr_pointer)
{
struct cg_pointer *pointer = calloc(1, sizeof(struct cg_pointer));
if (!pointer) {
wlr_log(WLR_ERROR, "Cannot allocate pointer");
return;
}
pointer->seat = seat;
pointer->pointer = wlr_pointer;
wlr_cursor_attach_input_device(seat->cursor, &wlr_pointer->base);
wl_list_insert(&seat->pointers, &pointer->link);
pointer->destroy.notify = handle_pointer_destroy;
wl_signal_add(&wlr_pointer->base.events.destroy, &pointer->destroy);
map_input_device_to_output(seat, &wlr_pointer->base, wlr_pointer->output_name);
}
static void
handle_virtual_pointer(struct wl_listener *listener, void *data)
{
struct cg_server *server = wl_container_of(listener, server, new_virtual_pointer);
struct cg_seat *seat = server->seat;
struct wlr_virtual_pointer_v1_new_pointer_event *event = data;
struct wlr_virtual_pointer_v1 *pointer = event->new_pointer;
struct wlr_pointer *wlr_pointer = &pointer->pointer;
/* We'll want to map the device back to an output later, this is a bit
* sub-optimal (we could just keep the suggested_output), but just copy
* its name so we do like other devices
*/
if (event->suggested_output != NULL) {
wlr_pointer->output_name = strdup(event->suggested_output->name);
}
/* TODO: event->suggested_seat should be checked if we handle multiple seats */
handle_new_pointer(seat, wlr_pointer);
update_capabilities(seat);
}
static void
handle_modifier_event(struct wlr_keyboard *keyboard, struct cg_seat *seat)
{
wlr_seat_set_keyboard(seat->seat, keyboard);
wlr_seat_keyboard_notify_modifiers(seat->seat, &keyboard->modifiers);
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static bool
handle_keybinding(struct cg_server *server, xkb_keysym_t sym)
{
#ifdef DEBUG
if (sym == XKB_KEY_Escape) {
wl_display_terminate(server->wl_display);
return true;
}
#endif
if (server->allow_vt_switch && sym >= XKB_KEY_XF86Switch_VT_1 && sym <= XKB_KEY_XF86Switch_VT_12) {
if (wlr_backend_is_multi(server->backend)) {
if (server->session) {
unsigned vt = sym - XKB_KEY_XF86Switch_VT_1 + 1;
wlr_session_change_vt(server->session, vt);
}
}
} else {
return false;
}
wlr_idle_notifier_v1_notify_activity(server->idle, server->seat->seat);
return true;
}
static void
handle_key_event(struct wlr_keyboard *keyboard, struct cg_seat *seat, void *data)
{
struct wlr_keyboard_key_event *event = data;
/* Translate from libinput keycode to an xkbcommon keycode. */
xkb_keycode_t keycode = event->keycode + 8;
const xkb_keysym_t *syms;
int nsyms = xkb_state_key_get_syms(keyboard->xkb_state, keycode, &syms);
bool handled = false;
uint32_t modifiers = wlr_keyboard_get_modifiers(keyboard);
if ((modifiers & WLR_MODIFIER_ALT) && event->state == WL_KEYBOARD_KEY_STATE_PRESSED) {
/* If Alt is held down and this button was pressed, we
* attempt to process it as a compositor
* keybinding. */
for (int i = 0; i < nsyms; i++) {
handled = handle_keybinding(seat->server, syms[i]);
}
}
if (!handled) {
/* Otherwise, we pass it along to the client. */
wlr_seat_set_keyboard(seat->seat, keyboard);
wlr_seat_keyboard_notify_key(seat->seat, event->time_msec, event->keycode, event->state);
}
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static void
handle_keyboard_group_key(struct wl_listener *listener, void *data)
{
struct cg_keyboard_group *cg_group = wl_container_of(listener, cg_group, key);
handle_key_event(&cg_group->wlr_group->keyboard, cg_group->seat, data);
}
static void
handle_keyboard_group_modifiers(struct wl_listener *listener, void *data)
{
struct cg_keyboard_group *group = wl_container_of(listener, group, modifiers);
handle_modifier_event(&group->wlr_group->keyboard, group->seat);
}
static void
cg_keyboard_group_add(struct wlr_keyboard *keyboard, struct cg_seat *seat, bool virtual)
{
/* We apparently should not group virtual keyboards,
* so create a new group with it
*/
if (!virtual) {
struct cg_keyboard_group *group;
wl_list_for_each (group, &seat->keyboard_groups, link) {
if (group->is_virtual)
continue;
struct wlr_keyboard_group *wlr_group = group->wlr_group;
if (wlr_keyboard_group_add_keyboard(wlr_group, keyboard)) {
wlr_log(WLR_DEBUG, "Added new keyboard to existing group");
return;
}
}
}
/* This is reached if and only if the keyboard could not be inserted into
* any group */
struct cg_keyboard_group *cg_group = calloc(1, sizeof(struct cg_keyboard_group));
if (cg_group == NULL) {
wlr_log(WLR_ERROR, "Failed to allocate keyboard group.");
return;
}
cg_group->seat = seat;
cg_group->is_virtual = virtual;
cg_group->wlr_group = wlr_keyboard_group_create();
if (cg_group->wlr_group == NULL) {
wlr_log(WLR_ERROR, "Failed to create wlr keyboard group.");
goto cleanup;
}
cg_group->wlr_group->data = cg_group;
wlr_keyboard_set_keymap(&cg_group->wlr_group->keyboard, keyboard->keymap);
wlr_keyboard_set_repeat_info(&cg_group->wlr_group->keyboard, keyboard->repeat_info.rate,
keyboard->repeat_info.delay);
wlr_log(WLR_DEBUG, "Created keyboard group");
wlr_keyboard_group_add_keyboard(cg_group->wlr_group, keyboard);
wl_list_insert(&seat->keyboard_groups, &cg_group->link);
wl_signal_add(&cg_group->wlr_group->keyboard.events.key, &cg_group->key);
cg_group->key.notify = handle_keyboard_group_key;
wl_signal_add(&cg_group->wlr_group->keyboard.events.modifiers, &cg_group->modifiers);
cg_group->modifiers.notify = handle_keyboard_group_modifiers;
return;
cleanup:
if (cg_group && cg_group->wlr_group) {
wlr_keyboard_group_destroy(cg_group->wlr_group);
}
free(cg_group);
}
static void
handle_new_keyboard(struct cg_seat *seat, struct wlr_keyboard *keyboard, bool virtual)
{
struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
if (!context) {
wlr_log(WLR_ERROR, "Unable to create XKB context");
return;
}
struct xkb_keymap *keymap = xkb_keymap_new_from_names(context, NULL, XKB_KEYMAP_COMPILE_NO_FLAGS);
if (!keymap) {
wlr_log(WLR_ERROR, "Unable to configure keyboard: keymap does not exist");
xkb_context_unref(context);
return;
}
wlr_keyboard_set_keymap(keyboard, keymap);
xkb_keymap_unref(keymap);
xkb_context_unref(context);
wlr_keyboard_set_repeat_info(keyboard, 25, 600);
cg_keyboard_group_add(keyboard, seat, virtual);
wlr_seat_set_keyboard(seat->seat, keyboard);
}
static void
handle_virtual_keyboard(struct wl_listener *listener, void *data)
{
struct cg_server *server = wl_container_of(listener, server, new_virtual_keyboard);
struct cg_seat *seat = server->seat;
struct wlr_virtual_keyboard_v1 *keyboard = data;
struct wlr_keyboard *wlr_keyboard = &keyboard->keyboard;
/* TODO: If multiple seats are supported, check keyboard->seat
* to select the appropriate one */
handle_new_keyboard(seat, wlr_keyboard, true);
update_capabilities(seat);
}
static void
handle_new_input(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, new_input);
struct wlr_input_device *device = data;
switch (device->type) {
case WLR_INPUT_DEVICE_KEYBOARD:
handle_new_keyboard(seat, wlr_keyboard_from_input_device(device), false);
break;
case WLR_INPUT_DEVICE_POINTER:
handle_new_pointer(seat, wlr_pointer_from_input_device(device));
break;
case WLR_INPUT_DEVICE_TOUCH:
handle_new_touch(seat, wlr_touch_from_input_device(device));
break;
case WLR_INPUT_DEVICE_SWITCH:
wlr_log(WLR_DEBUG, "Switch input is not implemented");
return;
case WLR_INPUT_DEVICE_TABLET:
case WLR_INPUT_DEVICE_TABLET_PAD:
wlr_log(WLR_DEBUG, "Tablet input is not implemented");
return;
}
update_capabilities(seat);
}
static void
handle_request_set_primary_selection(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, request_set_primary_selection);
struct wlr_seat_request_set_primary_selection_event *event = data;
wlr_seat_set_primary_selection(seat->seat, event->source, event->serial);
}
static void
handle_request_set_selection(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, request_set_selection);
struct wlr_seat_request_set_selection_event *event = data;
wlr_seat_set_selection(seat->seat, event->source, event->serial);
}
static void
handle_request_set_cursor(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, request_set_cursor);
struct wlr_seat_pointer_request_set_cursor_event *event = data;
struct wlr_surface *focused_surface = event->seat_client->seat->pointer_state.focused_surface;
bool has_focused = focused_surface != NULL && focused_surface->resource != NULL;
struct wl_client *focused_client = NULL;
if (has_focused) {
focused_client = wl_resource_get_client(focused_surface->resource);
}
/* This can be sent by any client, so we check to make sure
* this one actually has pointer focus first. */
if (focused_client == event->seat_client->client) {
wlr_cursor_set_surface(seat->cursor, event->surface, event->hotspot_x, event->hotspot_y);
}
}
static void
handle_touch_down(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, touch_down);
struct wlr_touch_down_event *event = data;
double lx, ly;
wlr_cursor_absolute_to_layout_coords(seat->cursor, &event->touch->base, event->x, event->y, &lx, &ly);
double sx, sy;
struct wlr_surface *surface;
struct cg_view *view = desktop_view_at(seat->server, lx, ly, &surface, &sx, &sy);
uint32_t serial = 0;
if (view) {
serial = wlr_seat_touch_notify_down(seat->seat, surface, event->time_msec, event->touch_id, sx, sy);
}
if (serial && wlr_seat_touch_num_points(seat->seat) == 1) {
seat->touch_id = event->touch_id;
seat->touch_lx = lx;
seat->touch_ly = ly;
press_cursor_button(seat, &event->touch->base, event->time_msec, BTN_LEFT, WLR_BUTTON_PRESSED, lx, ly);
}
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static void
handle_touch_up(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, touch_up);
struct wlr_touch_up_event *event = data;
if (!wlr_seat_touch_get_point(seat->seat, event->touch_id)) {
return;
}
if (wlr_seat_touch_num_points(seat->seat) == 1) {
press_cursor_button(seat, &event->touch->base, event->time_msec, BTN_LEFT, WLR_BUTTON_RELEASED,
seat->touch_lx, seat->touch_ly);
}
wlr_seat_touch_notify_up(seat->seat, event->time_msec, event->touch_id);
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static void
handle_touch_motion(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, touch_motion);
struct wlr_touch_motion_event *event = data;
if (!wlr_seat_touch_get_point(seat->seat, event->touch_id)) {
return;
}
double lx, ly;
wlr_cursor_absolute_to_layout_coords(seat->cursor, &event->touch->base, event->x, event->y, &lx, &ly);
double sx, sy;
struct wlr_surface *surface;
struct cg_view *view = desktop_view_at(seat->server, lx, ly, &surface, &sx, &sy);
if (view) {
wlr_seat_touch_point_focus(seat->seat, surface, event->time_msec, event->touch_id, sx, sy);
wlr_seat_touch_notify_motion(seat->seat, event->time_msec, event->touch_id, sx, sy);
} else {
wlr_seat_touch_point_clear_focus(seat->seat, event->time_msec, event->touch_id);
}
if (event->touch_id == seat->touch_id) {
seat->touch_lx = lx;
seat->touch_ly = ly;
}
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static void
handle_touch_frame(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, touch_frame);
wlr_seat_touch_notify_frame(seat->seat);
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static void
handle_cursor_frame(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, cursor_frame);
wlr_seat_pointer_notify_frame(seat->seat);
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static void
handle_cursor_axis(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, cursor_axis);
struct wlr_pointer_axis_event *event = data;
wlr_seat_pointer_notify_axis(seat->seat, event->time_msec, event->orientation, event->delta,
event->delta_discrete, event->source, event->relative_direction);
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static void
handle_cursor_button(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, cursor_button);
struct wlr_pointer_button_event *event = data;
wlr_seat_pointer_notify_button(seat->seat, event->time_msec, event->button, event->state);
press_cursor_button(seat, &event->pointer->base, event->time_msec, event->button, event->state, seat->cursor->x,
seat->cursor->y);
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static void
process_cursor_motion(struct cg_seat *seat, uint32_t time_msec, double *dx, double *dy, double dx_unaccel,
double dy_unaccel)
{
double sx, sy;
struct wlr_seat *wlr_seat = seat->seat;
struct wlr_surface *surface = NULL;
struct cg_view *view = desktop_view_at(seat->server, seat->cursor->x, seat->cursor->y, &surface, &sx, &sy);
if (!view) {
wlr_seat_pointer_clear_focus(wlr_seat);
} else {
wlr_seat_pointer_notify_enter(wlr_seat, surface, sx, sy);
wlr_seat_pointer_notify_motion(wlr_seat, time_msec, sx, sy);
}
if (dx != 0 || dy != 0) {
wlr_relative_pointer_manager_v1_send_relative_motion(seat->server->relative_pointer_manager, wlr_seat,
(uint64_t) time_msec * 1000, *dx, *dy, dx_unaccel,
dy_unaccel);
}
/* Apply pointer constraints. It has to be done before calling wlr_cursor_move() */
if (seat->active_constraint) {
double sx_confined, sy_confined;
/* wlr_region_confine() checks if the current position is within a confinement region.
* If it is, returns true and takes the next position after a move and ajusts it
* to the confinement region.
* It it's not, it returns false and does nothing.
* seat->confine: confinement region.
* sx/sy:current position.
* sx+dx/sy+dy: next position after a move.
* sx_confined/sy_confined: next position, but confined to the region.
*/
if (!wlr_region_confine(&seat->confine, sx, sy, sx + *dx, sy + *dy, &sx_confined, &sy_confined)) {
return;
}
*dx = sx_confined - sx;
*dy = sy_confined - sy;
}
struct cg_drag_icon *drag_icon;
wl_list_for_each (drag_icon, &seat->drag_icons, link) {
drag_icon_update_position(drag_icon);
}
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static void
warp_to_constraint_cursor_hint(struct cg_seat *seat)
{
struct wlr_pointer_constraint_v1 *constraint = seat->active_constraint;
if (constraint->current.committed & WLR_POINTER_CONSTRAINT_V1_STATE_CURSOR_HINT) {
double sx = constraint->current.cursor_hint.x;
double sy = constraint->current.cursor_hint.y;
struct cg_view *view = view_from_wlr_surface(constraint->surface);
if (!view) {
return;
}
wlr_cursor_warp(seat->cursor, NULL, sx, sy);
// Warp the pointer as well, so that on the next pointer rebase we don't
// send an unexpected synthetic motion event to clients.
wlr_seat_pointer_warp(constraint->seat, sx, sy);
}
}
static void
check_constraint_region(struct cg_seat *seat)
{
struct wlr_pointer_constraint_v1 *constraint = seat->active_constraint;
pixman_region32_t *region = &constraint->region;
if (seat->active_confine_requires_warp) {
seat->active_confine_requires_warp = false;
double sx = seat->cursor->x;
double sy = seat->cursor->y;
if (!pixman_region32_contains_point(region, floor(sx), floor(sy), NULL)) {
int nboxes;
pixman_box32_t *boxes = pixman_region32_rectangles(region, &nboxes);
if (nboxes > 0) {
double sx = (boxes[0].x1 + boxes[0].x2) / 2.;
double sy = (boxes[0].y1 + boxes[0].y2) / 2.;
wlr_cursor_warp_closest(seat->cursor, NULL, sx, sy);
}
}
}
// A locked pointer will result in an empty region, thus disallowing all movement
if (constraint->type == WLR_POINTER_CONSTRAINT_V1_CONFINED) {
pixman_region32_copy(&seat->confine, region);
} else {
pixman_region32_clear(&seat->confine);
}
}
static void
handle_constraint_commit(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, constraint_commit);
struct wlr_pointer_constraint_v1 *constraint = seat->active_constraint;
assert(constraint->surface == data);
check_constraint_region(seat);
}
/* This is where active_constraint is assigned. Also remember that everything
* regarding cursor is in cg_seat, because in Cage there's only a cursor per seat. */
void
cg_cursor_constrain(struct cg_seat *seat, struct wlr_pointer_constraint_v1 *constraint)
{
if (seat->active_constraint == constraint) {
return;
}
wl_list_remove(&seat->constraint_commit.link);
if (seat->active_constraint) {
if (constraint == NULL) {
warp_to_constraint_cursor_hint(seat);
}
wlr_pointer_constraint_v1_send_deactivated(seat->active_constraint);
}
seat->active_constraint = constraint;
if (constraint == NULL) {
wl_list_init(&seat->constraint_commit.link);
return;
}
seat->active_confine_requires_warp = true;
// FIXME: Big hack, stolen from wlr_pointer_constraints_v1.c:121.
// This is necessary because the focus may be set before the surface
// has finished committing, which means that warping won't work properly,
// since this code will be run *after* the focus has been set.
// That is why we duplicate the code here.
if (pixman_region32_not_empty(&constraint->current.region)) {
pixman_region32_intersect(&constraint->region, &constraint->surface->input_region,
&constraint->current.region);
} else {
pixman_region32_copy(&constraint->region, &constraint->surface->input_region);
}
check_constraint_region(seat);
wlr_pointer_constraint_v1_send_activated(constraint);
seat->constraint_commit.notify = handle_constraint_commit;
wl_signal_add(&constraint->surface->events.commit, &seat->constraint_commit);
}
static void
handle_pointer_constraint_set_region(struct wl_listener *listener, void *data)
{
struct cg_pointer_constraint *cg_constraint = wl_container_of(listener, cg_constraint, set_region);
struct cg_seat *seat = cg_constraint->seat;
seat->active_confine_requires_warp = true;
}
void
handle_constraint_destroy(struct wl_listener *listener, void *data)
{
struct cg_pointer_constraint *cg_constraint = wl_container_of(listener, cg_constraint, destroy);
struct wlr_pointer_constraint_v1 *constraint = data;
struct cg_seat *seat = cg_constraint->seat;
wl_list_remove(&cg_constraint->set_region.link);
wl_list_remove(&cg_constraint->destroy.link);
if (seat->active_constraint == constraint) {
warp_to_constraint_cursor_hint(seat);
if (seat->constraint_commit.link.next != NULL) {
wl_list_remove(&seat->constraint_commit.link);
}
wl_list_init(&seat->constraint_commit.link);
seat->active_constraint = NULL;
}
free(cg_constraint);
}
void
handle_pointer_constraint(struct wl_listener *listener, void *data)
{
struct wlr_pointer_constraint_v1 *constraint = data;
/* Recover cg_seat from a wlr_seat's data field. Every wlr_seat has it's data field
set to the cg_seat containing it, in seat_create(). */
struct cg_seat *seat = constraint->seat->data;
struct cg_pointer_constraint *cg_constraint = calloc(1, sizeof(struct cg_pointer_constraint));
cg_constraint->constraint = constraint;
cg_constraint->seat = seat;
cg_constraint->set_region.notify = handle_pointer_constraint_set_region;
wl_signal_add(&constraint->events.set_region, &cg_constraint->set_region);
cg_constraint->destroy.notify = handle_constraint_destroy;
wl_signal_add(&constraint->events.destroy, &cg_constraint->destroy);
struct wlr_surface *surface = seat->seat->keyboard_state.focused_surface;
if (surface && surface == constraint->surface) {
cg_cursor_constrain(seat, constraint);
}
}
static void
handle_cursor_motion_absolute(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, cursor_motion_absolute);
struct wlr_pointer_motion_absolute_event *event = data;
double lx, ly;
wlr_cursor_absolute_to_layout_coords(seat->cursor, &event->pointer->base, event->x, event->y, &lx, &ly);
double dx = lx - seat->cursor->x;
double dy = ly - seat->cursor->y;
wlr_cursor_warp_absolute(seat->cursor, &event->pointer->base, event->x, event->y);
process_cursor_motion(seat, event->time_msec, &dx, &dy, dx, dy);
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static void
handle_cursor_motion_relative(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, cursor_motion_relative);
struct wlr_pointer_motion_event *event = data;
double dx = event->delta_x;
double dy = event->delta_y;
process_cursor_motion(seat, event->time_msec, &dx, &dy, event->unaccel_dx,
event->unaccel_dy);
wlr_cursor_move(seat->cursor, &event->pointer->base, dx, dy);
wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
}
static void
drag_icon_update_position(struct cg_drag_icon *drag_icon)
{
struct wlr_drag_icon *wlr_icon = drag_icon->wlr_drag_icon;
struct cg_seat *seat = drag_icon->seat;
struct wlr_touch_point *point;
switch (wlr_icon->drag->grab_type) {
case WLR_DRAG_GRAB_KEYBOARD:
return;
case WLR_DRAG_GRAB_KEYBOARD_POINTER:
drag_icon->lx = seat->cursor->x;
drag_icon->ly = seat->cursor->y;
break;
case WLR_DRAG_GRAB_KEYBOARD_TOUCH:
point = wlr_seat_touch_get_point(seat->seat, wlr_icon->drag->touch_id);
if (!point) {
return;
}
drag_icon->lx = seat->touch_lx;
drag_icon->ly = seat->touch_ly;
break;
}
wlr_scene_node_set_position(&drag_icon->scene_tree->node, drag_icon->lx, drag_icon->ly);
}
static void
handle_drag_icon_destroy(struct wl_listener *listener, void *data)
{
struct cg_drag_icon *drag_icon = wl_container_of(listener, drag_icon, destroy);
wl_list_remove(&drag_icon->link);
wl_list_remove(&drag_icon->destroy.link);
wlr_scene_node_destroy(&drag_icon->scene_tree->node);
free(drag_icon);
}
static void
handle_request_start_drag(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, request_start_drag);
struct wlr_seat_request_start_drag_event *event = data;
if (wlr_seat_validate_pointer_grab_serial(seat->seat, event->origin, event->serial)) {
wlr_seat_start_pointer_drag(seat->seat, event->drag, event->serial);
return;
}
struct wlr_touch_point *point;
if (wlr_seat_validate_touch_grab_serial(seat->seat, event->origin, event->serial, &point)) {
wlr_seat_start_touch_drag(seat->seat, event->drag, event->serial, point);
return;
}
// TODO: tablet grabs
wlr_log(WLR_DEBUG, "Ignoring start_drag request: could not validate pointer/touch serial %" PRIu32,
event->serial);
wlr_data_source_destroy(event->drag->source);
}
static void
handle_start_drag(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, start_drag);
struct wlr_drag *wlr_drag = data;
struct wlr_drag_icon *wlr_drag_icon = wlr_drag->icon;
if (wlr_drag_icon == NULL) {
return;
}
struct cg_drag_icon *drag_icon = calloc(1, sizeof(struct cg_drag_icon));
if (!drag_icon) {
return;
}
drag_icon->seat = seat;
drag_icon->wlr_drag_icon = wlr_drag_icon;
drag_icon->scene_tree = wlr_scene_subsurface_tree_create(&seat->server->scene->tree, wlr_drag_icon->surface);
if (!drag_icon->scene_tree) {
free(drag_icon);
return;
}
drag_icon->destroy.notify = handle_drag_icon_destroy;
wl_signal_add(&wlr_drag_icon->events.destroy, &drag_icon->destroy);
wl_list_insert(&seat->drag_icons, &drag_icon->link);
drag_icon_update_position(drag_icon);
}
static void
handle_destroy(struct wl_listener *listener, void *data)
{
struct cg_seat *seat = wl_container_of(listener, seat, destroy);
wl_list_remove(&seat->destroy.link);
wl_list_remove(&seat->cursor_motion_relative.link);
wl_list_remove(&seat->cursor_motion_absolute.link);
wl_list_remove(&seat->cursor_button.link);
wl_list_remove(&seat->cursor_axis.link);
wl_list_remove(&seat->cursor_frame.link);
wl_list_remove(&seat->touch_down.link);
wl_list_remove(&seat->touch_up.link);
wl_list_remove(&seat->touch_motion.link);
wl_list_remove(&seat->touch_frame.link);
wl_list_remove(&seat->request_set_cursor.link);
wl_list_remove(&seat->request_set_selection.link);
wl_list_remove(&seat->request_set_primary_selection.link);
struct cg_keyboard_group *group, *group_tmp;
wl_list_for_each_safe (group, group_tmp, &seat->keyboard_groups, link) {
wlr_keyboard_group_destroy(group->wlr_group);
free(group);
}
struct cg_pointer *pointer, *pointer_tmp;
wl_list_for_each_safe (pointer, pointer_tmp, &seat->pointers, link) {
handle_pointer_destroy(&pointer->destroy, NULL);
}
struct cg_touch *touch, *touch_tmp;
wl_list_for_each_safe (touch, touch_tmp, &seat->touch, link) {
handle_touch_destroy(&touch->destroy, NULL);
}
wl_list_remove(&seat->new_input.link);
wlr_xcursor_manager_destroy(seat->xcursor_manager);
if (seat->cursor) {
wlr_cursor_destroy(seat->cursor);
}
free(seat);
}
struct cg_seat *
seat_create(struct cg_server *server, struct wlr_backend *backend)
{
struct cg_seat *seat = calloc(1, sizeof(struct cg_seat));
if (!seat) {
wlr_log(WLR_ERROR, "Cannot allocate seat");
return NULL;
}
seat->seat = wlr_seat_create(server->wl_display, "seat0");
if (!seat->seat) {