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