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https://github.com/obsproject/obs-studio.git
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549c0f5850
The D-Bus signal subscription is a very boring aspect of the portals infrastructure that shouldn't really matter when reading the code of pipewire.c. Move it out to its natural place, portal.c.
207 lines
5.0 KiB
C
207 lines
5.0 KiB
C
/* portal.c
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*
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* Copyright 2021 Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "portal.h"
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#include "pipewire.h"
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#include <util/dstr.h>
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struct portal_signal_call {
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GCancellable *cancellable;
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portal_signal_callback callback;
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gpointer user_data;
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char *request_path;
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guint signal_id;
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gulong cancelled_id;
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};
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#define REQUEST_PATH "/org/freedesktop/portal/desktop/request/%s/obs%u"
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#define SESSION_PATH "/org/freedesktop/portal/desktop/session/%s/obs%u"
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static GDBusConnection *connection = NULL;
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static void ensure_connection(void)
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{
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g_autoptr(GError) error = NULL;
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if (!connection) {
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connection = g_bus_get_sync(G_BUS_TYPE_SESSION, NULL, &error);
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if (error) {
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blog(LOG_WARNING,
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"[portals] Error retrieving D-Bus connection: %s",
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error->message);
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return;
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}
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}
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}
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char *get_sender_name(void)
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{
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char *sender_name;
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char *aux;
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ensure_connection();
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sender_name =
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bstrdup(g_dbus_connection_get_unique_name(connection) + 1);
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/* Replace dots by underscores */
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while ((aux = strstr(sender_name, ".")) != NULL)
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*aux = '_';
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return sender_name;
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}
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GDBusConnection *portal_get_dbus_connection(void)
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{
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ensure_connection();
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return connection;
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}
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void portal_create_request_path(char **out_path, char **out_token)
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{
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static uint32_t request_token_count = 0;
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request_token_count++;
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if (out_token) {
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struct dstr str;
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dstr_init(&str);
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dstr_printf(&str, "obs%u", request_token_count);
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*out_token = str.array;
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}
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if (out_path) {
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char *sender_name;
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struct dstr str;
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sender_name = get_sender_name();
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dstr_init(&str);
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dstr_printf(&str, REQUEST_PATH, sender_name,
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request_token_count);
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*out_path = str.array;
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bfree(sender_name);
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}
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}
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void portal_create_session_path(char **out_path, char **out_token)
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{
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static uint32_t session_token_count = 0;
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session_token_count++;
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if (out_token) {
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struct dstr str;
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dstr_init(&str);
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dstr_printf(&str, "obs%u", session_token_count);
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*out_token = str.array;
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}
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if (out_path) {
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char *sender_name;
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struct dstr str;
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sender_name = get_sender_name();
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dstr_init(&str);
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dstr_printf(&str, SESSION_PATH, sender_name,
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session_token_count);
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*out_path = str.array;
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bfree(sender_name);
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}
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}
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static void portal_signal_call_free(struct portal_signal_call *call)
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{
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if (call->signal_id)
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g_dbus_connection_signal_unsubscribe(
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portal_get_dbus_connection(), call->signal_id);
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if (call->cancelled_id > 0)
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g_signal_handler_disconnect(call->cancellable,
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call->cancelled_id);
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g_clear_pointer(&call->request_path, bfree);
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bfree(call);
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}
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static void on_cancelled_cb(GCancellable *cancellable, void *data)
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{
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UNUSED_PARAMETER(cancellable);
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struct portal_signal_call *call = data;
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blog(LOG_INFO, "[portals] Request cancelled");
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g_dbus_connection_call(
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portal_get_dbus_connection(), "org.freedesktop.portal.Desktop",
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call->request_path, "org.freedesktop.portal.Request", "Close",
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NULL, NULL, G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
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portal_signal_call_free(call);
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}
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static void on_response_received_cb(GDBusConnection *connection,
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const char *sender_name,
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const char *object_path,
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const char *interface_name,
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const char *signal_name,
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GVariant *parameters, void *user_data)
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{
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UNUSED_PARAMETER(connection);
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UNUSED_PARAMETER(sender_name);
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UNUSED_PARAMETER(object_path);
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UNUSED_PARAMETER(interface_name);
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UNUSED_PARAMETER(signal_name);
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struct portal_signal_call *call = user_data;
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if (call->callback)
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call->callback(parameters, call->user_data);
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portal_signal_call_free(call);
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}
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void portal_signal_subscribe(const char *path, GCancellable *cancellable,
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portal_signal_callback callback,
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gpointer user_data)
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{
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struct portal_signal_call *call;
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call = bzalloc(sizeof(struct portal_signal_call));
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call->request_path = bstrdup(path);
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call->callback = callback;
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call->user_data = user_data;
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call->cancellable = cancellable ? g_object_ref(cancellable) : NULL;
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call->cancelled_id =
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cancellable
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? g_signal_connect(cancellable, "cancelled",
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G_CALLBACK(on_cancelled_cb), call)
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: 0;
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call->signal_id = g_dbus_connection_signal_subscribe(
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portal_get_dbus_connection(), "org.freedesktop.portal.Desktop",
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"org.freedesktop.portal.Request", "Response",
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call->request_path, NULL, G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE,
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on_response_received_cb, call, NULL);
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}
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