Unbreak protocol ABI for XIAllowEvents - inputproto 2.1.99.6

XIAllowEvents was extended with touchid and grab_window in
2ea2f99f4fe1dcd3b8e539ca41c482fc40a0533d. This extended the size of
the request from 12 to 20 but also broke the ABI. Older server
match the request size exactly, so compiling libXi 1.5 against
inputproto 2.2 and then running it against a pre-XI 2.2 server causes a
BadLength for any XIAllowEvent request.

Add a new request for the new data.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Keith Packard <keithp@keithp.com>

1 files changed, 17 insertions, 2 deletions

diff --git a/XI2proto.h b/XI2proto.h
index 93d7e32..733f923 100644
--- a/XI2proto.h
+++ b/XI2proto.h
@@ -647,10 +647,25 @@ typedef struct {
     uint16_t    deviceid;
     uint8_t     mode;
     uint8_t     pad;
+} xXIAllowEventsReq;
+#define sz_xXIAllowEventsReq                   12
+
+/**
+ * Allow or replay events on the specified grabbed device.
+ * Since XI 2.2
+ */
+typedef struct {
+    uint8_t     reqType;
+    uint8_t     ReqType;                /**< Always ::X_XIAllowEvents */
+    uint16_t    length;                 /**< Length in 4 byte units */
+    Time        time;
+    uint16_t    deviceid;
+    uint8_t     mode;
+    uint8_t     pad;
     uint32_t    touchid;                /**< Since XI 2.2 */
     Window      grab_window;            /**< Since XI 2.2 */
-} xXIAllowEventsReq;
-#define sz_xXIAllowEventsReq                   20 /**< Was 12 before XI 2.2 */
+} xXI2_2AllowEventsReq;
+#define sz_xXI2_2AllowEventsReq                20
 
 
 /**