server: add listener API for new clients

Using display object, Emit a signal if a new client is created.

In the server-side, we can get the destroy event of a client,
But there is no way to get the created event of it.
Of course, we can get the client object from the global registry
binding callbacks.
But it can be called several times with same client object.
And even if A client creates display object,
(so there is a connection), The server could not know that.
There could be more use-cases not only for this.

Giulio: a test is added for the new functionality

Signed-off-by: Sung-jae Park <nicesj@nicesj.com>
Signed-off-by: Giulio Camuffo <giulio.camuffo@kdab.com>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

1 files changed, 87 insertions, 0 deletions

diff --git a/tests/compositor-introspection-test.c b/tests/compositor-introspection-test.c
new file mode 100644
index 0000000..5d2085d
--- /dev/null
+++ b/tests/compositor-introspection-test.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright © 2016 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/un.h>
+#include <unistd.h>
+
+#include "wayland-client.h"
+#include "wayland-server.h"
+#include "test-runner.h"
+
+/* Ensure the connection doesn't fail due to lack of XDG_RUNTIME_DIR. */
+static const char *
+require_xdg_runtime_dir(void)
+{
+	char *val = getenv("XDG_RUNTIME_DIR");
+	assert(val && "set $XDG_RUNTIME_DIR to run this test");
+
+	return val;
+}
+
+struct compositor {
+	struct wl_display *display;
+	struct wl_listener listener;
+	struct wl_client *client;
+};
+
+static void
+client_created(struct wl_listener *listener, void *data)
+{
+	struct compositor *c = wl_container_of(listener, c, listener);
+	c->client = data;
+}
+
+TEST(new_client_connect)
+{
+	const char *socket;
+	struct compositor compositor = { 0 };
+	struct {
+		struct wl_display *display;
+	} client;
+
+	require_xdg_runtime_dir();
+
+	compositor.display = wl_display_create();
+	socket = wl_display_add_socket_auto(compositor.display);
+
+	compositor.listener.notify = client_created;
+	wl_display_add_client_created_listener(compositor.display, &compositor.listener);
+
+	client.display = wl_display_connect(socket);
+
+	wl_event_loop_dispatch(wl_display_get_event_loop(compositor.display), 100);
+
+	assert(compositor.client != NULL);
+
+	wl_display_disconnect(client.display);
+
+	wl_client_destroy(compositor.client);
+	wl_display_destroy(compositor.display);
+}