From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Thu, 19 Dec 2013 23:22:32 +0000 (+1000)
Subject: Provide accessors to retrieve the right event type
X-Git-Tag: 0.1.0~62
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e99d36278789a9f8e7bcc1ce47fa11ed77011b2c;p=platform%2Fupstream%2Flibinput.git

Provide accessors to retrieve the right event type

Slightly enhances the type-safety. A caller may now do something along the
lines of

	struct libinput_event_pointer *ptrev;
	ptrev = libinput_event_get_pointer_event(event);

	if (!ptrev)
	   oops, that wasn't a pointer event

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---

diff --git a/src/libinput.c b/src/libinput.c
index ec862394..45f922ec 100644
--- a/src/libinput.c
+++ b/src/libinput.c
@@ -107,6 +107,92 @@ libinput_event_get_device(struct libinput_event *event)
 	return event->device;
 }
 
+LIBINPUT_EXPORT struct libinput_event_pointer*
+libinput_event_get_pointer_event(struct libinput_event *event)
+{
+	switch (event->type) {
+	case LIBINPUT_EVENT_NONE:
+		abort(); /* not used as actual event type */
+	case LIBINPUT_EVENT_DEVICE_ADDED:
+	case LIBINPUT_EVENT_DEVICE_REMOVED:
+	case LIBINPUT_EVENT_KEYBOARD_KEY:
+		break;
+	case LIBINPUT_EVENT_POINTER_MOTION:
+	case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
+	case LIBINPUT_EVENT_POINTER_BUTTON:
+	case LIBINPUT_EVENT_POINTER_AXIS:
+		return (struct libinput_event_pointer*)event;
+	case LIBINPUT_EVENT_TOUCH_TOUCH:
+		break;
+	}
+
+	return NULL;
+}
+
+LIBINPUT_EXPORT struct libinput_event_keyboard*
+libinput_event_get_keyboard_event(struct libinput_event *event)
+{
+	switch (event->type) {
+	case LIBINPUT_EVENT_NONE:
+		abort(); /* not used as actual event type */
+	case LIBINPUT_EVENT_DEVICE_ADDED:
+	case LIBINPUT_EVENT_DEVICE_REMOVED:
+		break;
+	case LIBINPUT_EVENT_KEYBOARD_KEY:
+		return (struct libinput_event_keyboard*)event;
+	case LIBINPUT_EVENT_POINTER_MOTION:
+	case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
+	case LIBINPUT_EVENT_POINTER_BUTTON:
+	case LIBINPUT_EVENT_POINTER_AXIS:
+	case LIBINPUT_EVENT_TOUCH_TOUCH:
+		break;
+	}
+
+	return NULL;
+}
+
+LIBINPUT_EXPORT struct libinput_event_touch*
+libinput_event_get_touch_event(struct libinput_event *event)
+{
+	switch (event->type) {
+	case LIBINPUT_EVENT_NONE:
+		abort(); /* not used as actual event type */
+	case LIBINPUT_EVENT_DEVICE_ADDED:
+	case LIBINPUT_EVENT_DEVICE_REMOVED:
+	case LIBINPUT_EVENT_KEYBOARD_KEY:
+	case LIBINPUT_EVENT_POINTER_MOTION:
+	case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
+	case LIBINPUT_EVENT_POINTER_BUTTON:
+	case LIBINPUT_EVENT_POINTER_AXIS:
+		break;
+	case LIBINPUT_EVENT_TOUCH_TOUCH:
+		return (struct libinput_event_touch*)event;
+	}
+
+	return NULL;
+}
+
+LIBINPUT_EXPORT struct libinput_event_device_notify*
+libinput_event_get_device_notify_event(struct libinput_event *event)
+{
+	switch (event->type) {
+	case LIBINPUT_EVENT_NONE:
+		abort(); /* not used as actual event type */
+	case LIBINPUT_EVENT_DEVICE_ADDED:
+	case LIBINPUT_EVENT_DEVICE_REMOVED:
+		return (struct libinput_event_device_notify*)event;
+	case LIBINPUT_EVENT_KEYBOARD_KEY:
+	case LIBINPUT_EVENT_POINTER_MOTION:
+	case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
+	case LIBINPUT_EVENT_POINTER_BUTTON:
+	case LIBINPUT_EVENT_POINTER_AXIS:
+	case LIBINPUT_EVENT_TOUCH_TOUCH:
+		break;
+	}
+
+	return NULL;
+}
+
 LIBINPUT_EXPORT uint32_t
 libinput_event_keyboard_get_time(
 	struct libinput_event_keyboard *event)
diff --git a/src/libinput.h b/src/libinput.h
index ec8336d7..1df6cdd3 100644
--- a/src/libinput.h
+++ b/src/libinput.h
@@ -237,6 +237,50 @@ libinput_event_get_context(struct libinput_event *event);
 struct libinput_device*
 libinput_event_get_device(struct libinput_event *event);
 
+/**
+ * @ingroup event
+ *
+ * Return the pointer event that is this input event. If the event type does
+ * not match the pointer event types, this function returns NULL.
+ *
+ * @return A pointer event, or NULL for other events
+ */
+struct libinput_event_pointer*
+libinput_event_get_pointer_event(struct libinput_event *event);
+
+/**
+ * @ingroup event
+ *
+ * Return the keyboard event that is this input event. If the event type does
+ * not match the keyboard event types, this function returns NULL.
+ *
+ * @return A keyboard event, or NULL for other events
+ */
+struct libinput_event_keyboard*
+libinput_event_get_keyboard_event(struct libinput_event *event);
+
+/**
+ * @ingroup event
+ *
+ * Return the touch event that is this input event. If the event type does
+ * not match the touch event types, this function returns NULL.
+ *
+ * @return A touch event, or NULL for other events
+ */
+struct libinput_event_touch*
+libinput_event_get_touch_event(struct libinput_event *event);
+
+/**
+ * @ingroup event
+ *
+ * Return the device event that is this input event. If the event type does
+ * not match the device event types, this function returns NULL.
+ *
+ * @return A device event, or NULL for other events
+ */
+struct libinput_event_device_notify*
+libinput_event_get_device_notify_event(struct libinput_event *event);
+
 /**
  * @defgroup event_keyboard Keyboard events
  *