From 1d8f5a637ee5799fff7c5eb382afc0035dfde6d8 Mon Sep 17 00:00:00 2001
From: Reinout Meliesie <zedfrigg@kernelmaft.com>
Date: Sat, 27 Feb 2021 14:39:41 +0100
Subject: [PATCH] Import old version using libinput

---
 CMakeLists.txt      | 22 +++++++++++
 cmake/cmake-modules |  1 +
 main.c              | 94 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 117 insertions(+)
 create mode 100644 CMakeLists.txt
 create mode 160000 cmake/cmake-modules
 create mode 100644 main.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..d78d717
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,22 @@
+cmake_minimum_required(VERSION 3.17)
+project(evdev_actions)
+
+set(CMAKE_C_STANDARD 11)
+
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/cmake-modules")
+
+add_executable(evdev_actions main.c)
+
+find_package(Libinput REQUIRED)
+if(NOT ${Libinput_FOUND})
+    message(FATAL_ERROR "libinput not found")
+endif()
+target_include_directories(evdev_actions PUBLIC ${Libinput_INCLUDE_DIRS})
+target_link_libraries(evdev_actions ${Libinput_LIBRARIES})
+
+find_package(udev REQUIRED)
+if(NOT ${UDEV_FOUND})
+    message(FATAL_ERROR "libudev not found")
+endif()
+target_include_directories(evdev_actions PUBLIC ${UDEV_INCLUDE_DIRS})
+target_link_libraries(evdev_actions ${UDEV_LIBRARIES})
diff --git a/cmake/cmake-modules b/cmake/cmake-modules
new file mode 160000
index 0000000..6a74889
--- /dev/null
+++ b/cmake/cmake-modules
@@ -0,0 +1 @@
+Subproject commit 6a748896188fdf3f885820ccd686393ea5215dbf
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..c01c549
--- /dev/null
+++ b/main.c
@@ -0,0 +1,94 @@
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <libinput.h>
+#include <libudev.h>
+#include <stdio.h>
+#include <unistd.h>
+
+
+static int open_restricted(const char* path, int flags, void* user_data)
+{
+	int fd = open(path, flags);
+	return fd < 0 ? -errno : fd;
+}
+
+static void close_restricted(int fd, void* user_data)
+{
+	close(fd);
+}
+
+const static struct libinput_interface interface = {
+	.open_restricted = open_restricted,
+	.close_restricted = close_restricted,
+};
+
+void handle_device_added(struct libinput_event_device_notify* event)
+{
+	assert(event != NULL);
+}
+
+void handle_button_press(struct libinput_event_switch* event)
+{
+	assert(event != NULL);
+
+
+}
+
+int main(int argc, char* argv[])
+{
+	struct udev* udev_context = udev_new();
+	struct libinput* libinput_context = libinput_udev_create_context(&interface, NULL, udev_context);
+
+	libinput_udev_assign_seat(libinput_context, "seat0");
+
+	int libinput_fd = libinput_get_fd(libinput_context);
+
+	struct libinput_event* event;
+
+	// Setup loop
+	libinput_dispatch(libinput_context);
+	while ((event = libinput_get_event(libinput_context)) != NULL) {
+		printf("Setup event occurred\n");
+
+		if (libinput_event_get_type(event) == LIBINPUT_EVENT_DEVICE_ADDED) {
+			handle_device_added(libinput_event_get_device_notify_event(event));
+			printf("\tDevice added event\n");
+		}
+		else {
+			printf("\tOther type of event\n");
+		}
+
+		libinput_event_destroy(event);
+	}
+	printf("No more setup events\n");
+
+	// Main loop
+	while (1) {
+		// TODO: use select/poll/epoll to block until fd has new data
+		// https://daniel.haxx.se/docs/poll-vs-select.html
+		// https://en.wikipedia.org/wiki/Epoll
+		// https://github.com/wayland-project/libinput/blob/master/tools/libinput-debug-events.c
+		// https://wayland.freedesktop.org/libinput/doc/latest/api/
+
+		libinput_dispatch(libinput_context);
+		while ((event = libinput_get_event(libinput_context)) != NULL) {
+			printf("Event occurred\n");
+
+			if (libinput_event_get_type(event) == LIBINPUT_EVENT_SWITCH_TOGGLE) {
+				handle_button_press(libinput_event_get_switch_event(event));
+				printf("\tSwitch toggle event\n");
+			}
+			else {
+				printf("\tOther type of event\n");
+			}
+
+			libinput_event_destroy(event);
+			libinput_dispatch(libinput_context);
+		}
+	}
+
+	printf("No more events\n");
+
+	return EXIT_SUCCESS;
+}