API: Events: Implement channel_send_event and vimscript wrapper

This function can be used to send arbitrary objects via the API channel back to
connected clients, identified by channel id.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/nvim/os/msgpack_rpc.c b/src/nvim/os/msgpack_rpc.c
index 62d68ebdec..423c5d584d 100644
--- a/src/nvim/os/msgpack_rpc.c
+++ b/src/nvim/os/msgpack_rpc.c
@@ -113,6 +113,15 @@ void msgpack_rpc_call(uint64_t id, msgpack_object *req, msgpack_packer *res)
   msgpack_rpc_dispatch(id, req, res);
 }
 
+void msgpack_rpc_notification(String type, Object data, msgpack_packer *pac)
+{
+  msgpack_pack_array(pac, 3);
+  msgpack_pack_int(pac, 2);
+  msgpack_pack_raw(pac, type.size);
+  msgpack_pack_raw_body(pac, type.data, type.size);
+  msgpack_rpc_from_object(data, pac);
+}
+
 void msgpack_rpc_error(char *msg, msgpack_packer *res)
 {
   size_t len = strlen(msg);