evdev: Add event process dispatching

By setting an 'evdev_dispatch' struct in 'evdev_input_device' during
device configuration the 'process' function in the associated interface
will be called with received input events. If none is set, a fallback
handler will be set instead that handle generic input functionality.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>

1 files changed, 103 insertions, 0 deletions

diff --git a/src/evdev-private.h b/src/evdev-private.h
new file mode 100644
index 0000000..dd72430
--- /dev/null
+++ b/src/evdev-private.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission.  The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef EVDEV_PRIVATE_H
+#define EVDEV_PRIVATE_H
+
+#include <linux/input.h>
+#include <wayland-util.h>
+
+struct evdev_seat {
+	struct weston_seat base;
+	struct wl_list devices_list;
+	struct udev_monitor *udev_monitor;
+	struct wl_event_source *udev_monitor_source;
+	char *seat_id;
+};
+
+#define MAX_SLOTS 16
+
+struct evdev_input_device {
+	struct evdev_seat *master;
+	struct wl_list link;
+	struct wl_event_source *source;
+	struct weston_output *output;
+	struct evdev_dispatch *dispatch;
+	char *devnode;
+	int fd;
+	struct {
+		int min_x, max_x, min_y, max_y;
+		int old_x, old_y, reset_x, reset_y;
+		int32_t x, y;
+	} abs;
+
+	struct {
+		int slot;
+		int32_t x[MAX_SLOTS];
+		int32_t y[MAX_SLOTS];
+	} mt;
+	struct mtdev *mtdev;
+
+	struct {
+		wl_fixed_t dx, dy;
+	} rel;
+
+	int type; /* event type flags */
+
+	int is_touchpad, is_mt;
+};
+
+/* event type flags */
+#define EVDEV_ABSOLUTE_MOTION		(1 << 0)
+#define EVDEV_ABSOLUTE_MT_DOWN		(1 << 1)
+#define EVDEV_ABSOLUTE_MT_MOTION	(1 << 2)
+#define EVDEV_ABSOLUTE_MT_UP		(1 << 3)
+#define EVDEV_RELATIVE_MOTION		(1 << 4)
+
+/* copied from udev/extras/input_id/input_id.c */
+/* we must use this kernel-compatible implementation */
+#define BITS_PER_LONG (sizeof(unsigned long) * 8)
+#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
+#define OFF(x)  ((x)%BITS_PER_LONG)
+#define BIT(x)  (1UL<<OFF(x))
+#define LONG(x) ((x)/BITS_PER_LONG)
+#define TEST_BIT(array, bit)    ((array[LONG(bit)] >> OFF(bit)) & 1)
+/* end copied */
+
+struct evdev_dispatch;
+
+struct evdev_dispatch_interface {
+	/* Process an evdev input event. */
+	void (*process)(struct evdev_dispatch *dispatch,
+			struct evdev_input_device *device,
+			struct input_event *event,
+			uint32_t time);
+
+	/* Destroy an event dispatch handler and free all its resources. */
+	void (*destroy)(struct evdev_dispatch *dispatch);
+};
+
+struct evdev_dispatch {
+	struct evdev_dispatch_interface *interface;
+};
+
+#endif /* EVDEV_PRIVATE_H */