ui: Reimplement `:suspend` command for remote UIs.

- Remove suspend method from the UI protocol
- Handle `:suspend` by disconnecting the last channel that sent a request to
  nvim.

2 files changed, 1 insertions, 7 deletions

diff --git a/src/nvim/msgpack_rpc/channel.c b/src/nvim/msgpack_rpc/channel.c
index af7e7fa409..85511fb587 100644
--- a/src/nvim/msgpack_rpc/channel.c
+++ b/src/nvim/msgpack_rpc/channel.c
@@ -485,6 +485,7 @@ static void on_request_event(Event event)
 {
   RequestEvent *e = event.data;
   Channel *channel = e->channel;
+  last_message_source = channel->id;
   MsgpackRpcRequestHandler handler = e->handler;
   Array args = e->args;
   uint64_t request_id = e->request_id;
diff --git a/src/nvim/msgpack_rpc/remote_ui.c b/src/nvim/msgpack_rpc/remote_ui.c
index 6a638df61c..4db9c71ebb 100644
--- a/src/nvim/msgpack_rpc/remote_ui.c
+++ b/src/nvim/msgpack_rpc/remote_ui.c
@@ -97,7 +97,6 @@ static Object remote_ui_attach(uint64_t channel_id, uint64_t request_id,
   ui->update_fg = remote_ui_update_fg;
   ui->update_bg = remote_ui_update_bg;
   ui->flush = remote_ui_flush;
-  ui->suspend = remote_ui_suspend;
   pmap_put(uint64_t)(connected_uis, channel_id, ui);
   ui_attach(ui);
   return NIL;
@@ -319,9 +318,3 @@ static void remote_ui_flush(UI *ui)
   channel_send_event(data->channel_id, "redraw", data->buffer);
   data->buffer = (Array)ARRAY_DICT_INIT;
 }
-
-static void remote_ui_suspend(UI *ui)
-{
-  UIData *data = ui->data;
-  remote_ui_disconnect(data->channel_id);
-}