pH/sommelier/sommelier-relative-pointer-manager.cc

165 lines
6.1 KiB
C++

// Copyright 2019 The ChromiumOS Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "sommelier.h" // NOLINT(build/include_directory)
#include <assert.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
#include <wayland-client.h>
#include <wayland-server-core.h>
#include <wayland-util.h>
#include "relative-pointer-unstable-v1-client-protocol.h" // NOLINT(build/include_directory)
#include "relative-pointer-unstable-v1-server-protocol.h" // NOLINT(build/include_directory)
struct sl_host_relative_pointer_manager {
struct sl_context* ctx;
struct wl_resource* resource;
struct zwp_relative_pointer_manager_v1* proxy;
};
struct sl_host_relative_pointer {
struct sl_context* ctx;
struct wl_resource* resource;
struct zwp_relative_pointer_v1* proxy;
};
// Like ceil(), but strictly increases the magnitude of the input value (i.e.
// trunc() but for increasing the magnitude).
wl_fixed_t magnitude_ceil(wl_fixed_t val) {
double temp = wl_fixed_to_double(val);
temp = temp > 0 ? ceil(temp) : floor(temp);
return wl_fixed_from_double(temp);
}
static void sl_relative_pointer_relative_motion(
void* data,
struct zwp_relative_pointer_v1* relative_pointer,
uint32_t utime_hi,
uint32_t utime_lo,
wl_fixed_t dx,
wl_fixed_t dy,
wl_fixed_t dx_unaccel,
wl_fixed_t dy_unaccel) {
struct sl_host_relative_pointer* host =
static_cast<sl_host_relative_pointer*>(
zwp_relative_pointer_v1_get_user_data(relative_pointer));
// Unfortunately, many x11 toolkits truncate RawMotion events. We force them
// to interpret cursor movement by rounding to the next greater-magnitude
// value.
if (host->ctx->xwayland) {
dx_unaccel = magnitude_ceil(dx_unaccel);
dy_unaccel = magnitude_ceil(dy_unaccel);
}
zwp_relative_pointer_v1_send_relative_motion(
host->resource, utime_hi, utime_lo, dx, dy, dx_unaccel, dy_unaccel);
}
static void sl_destroy_host_relative_pointer(struct wl_resource* resource) {
struct sl_host_relative_pointer* host =
static_cast<sl_host_relative_pointer*>(
wl_resource_get_user_data(resource));
zwp_relative_pointer_v1_destroy(host->proxy);
wl_resource_set_user_data(resource, NULL);
delete host;
}
static void sl_relative_pointer_destroy(struct wl_client* client,
struct wl_resource* resource) {
wl_resource_destroy(resource);
}
static struct zwp_relative_pointer_v1_listener sl_relative_pointer_listener = {
sl_relative_pointer_relative_motion,
};
static struct zwp_relative_pointer_v1_interface
sl_relative_pointer_implementation = {
sl_relative_pointer_destroy,
};
static void sl_destroy_host_relative_pointer_manager(
struct wl_resource* resource) {
struct sl_host_relative_pointer_manager* host =
static_cast<sl_host_relative_pointer_manager*>(
wl_resource_get_user_data(resource));
zwp_relative_pointer_manager_v1_destroy(host->proxy);
wl_resource_set_user_data(resource, NULL);
delete host;
}
static void sl_relative_pointer_manager_destroy(struct wl_client* client,
struct wl_resource* resource) {
wl_resource_destroy(resource);
}
static void sl_relative_pointer_manager_get_relative_pointer(
struct wl_client* client,
struct wl_resource* resource,
uint32_t id,
struct wl_resource* pointer) {
struct sl_host_relative_pointer_manager* host =
static_cast<sl_host_relative_pointer_manager*>(
wl_resource_get_user_data(resource));
struct sl_host_pointer* host_pointer =
static_cast<sl_host_pointer*>(wl_resource_get_user_data(pointer));
struct wl_resource* relative_pointer_resource =
wl_resource_create(client, &zwp_relative_pointer_v1_interface, 1, id);
struct sl_host_relative_pointer* relative_pointer_host =
new sl_host_relative_pointer();
relative_pointer_host->resource = relative_pointer_resource;
relative_pointer_host->ctx = host->ctx;
relative_pointer_host->proxy =
zwp_relative_pointer_manager_v1_get_relative_pointer(host->proxy,
host_pointer->proxy);
wl_resource_set_implementation(
relative_pointer_resource, &sl_relative_pointer_implementation,
relative_pointer_host, sl_destroy_host_relative_pointer);
zwp_relative_pointer_v1_add_listener(relative_pointer_host->proxy,
&sl_relative_pointer_listener,
relative_pointer_host);
} // NOLINT(whitespace/indent)
static struct zwp_relative_pointer_manager_v1_interface
sl_relative_pointer_manager_implementation = {
sl_relative_pointer_manager_destroy,
sl_relative_pointer_manager_get_relative_pointer,
};
static void sl_bind_host_relative_pointer_manager(struct wl_client* client,
void* data,
uint32_t version,
uint32_t id) {
struct sl_context* ctx = (struct sl_context*)data;
struct sl_relative_pointer_manager* relative_pointer_manager =
ctx->relative_pointer_manager;
struct sl_host_relative_pointer_manager* host =
new sl_host_relative_pointer_manager();
host->ctx = ctx;
host->resource = wl_resource_create(
client, &zwp_relative_pointer_manager_v1_interface, 1, id);
wl_resource_set_implementation(
host->resource, &sl_relative_pointer_manager_implementation, host,
sl_destroy_host_relative_pointer_manager);
host->proxy = static_cast<zwp_relative_pointer_manager_v1*>(wl_registry_bind(
wl_display_get_registry(ctx->display), relative_pointer_manager->id,
&zwp_relative_pointer_manager_v1_interface,
wl_resource_get_version(host->resource)));
zwp_relative_pointer_manager_v1_set_user_data(host->proxy, host);
}
struct sl_global* sl_relative_pointer_manager_global_create(
struct sl_context* ctx) {
return sl_global_create(ctx, &zwp_relative_pointer_manager_v1_interface, 1,
ctx, sl_bind_host_relative_pointer_manager);
}