Add tapping logic

This patch adds tap-to-click, tap-and-hold for dragging, two-finger
and three-finger taps. Turned on by default for touch screens only;
switch on in gestures.c.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

1 files changed, 9 insertions, 0 deletions

diff --git a/mtdev/iobuf.c b/mtdev/iobuf.c
index 8e367b8..65c33f6 100644
--- a/mtdev/iobuf.c
+++ b/mtdev/iobuf.c
@@ -20,6 +20,7 @@
  **************************************************************************/
 
 #include <mtdev-iobuf.h>
+#include <sys/poll.h>
 
 void init_iobuf(struct IOBuffer *buf)
 {
@@ -52,3 +53,11 @@ const struct input_event *get_iobuf_event(struct IOBuffer *buf, int fd)
         buf->at += EVENT_SIZE;
         return ev;
 }
+
+int poll_iobuf(struct IOBuffer *buf, int fd, int ms)
+{
+        struct pollfd fds = { fd, POLLIN, 0 };
+        if (buf->top != buf->at)
+                return 1;
+        return poll(&fds, 1, ms);
+}