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perf(ui): reduce allocation overhead when encoding "redraw" events

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Note for external UIs: Nvim can now emit multiple "redraw" event batches
before a final "flush" event is received. To retain existing behavior,
clients should make sure to update visible state at an explicit "flush"
event, not just the end of a "redraw" batch of event.

* Get rid of copy_object() blizzard in the auto-generated ui_event layer
* Special case "grid_line" by encoding screen state directly to
  msgpack events with no intermediate API events.
* Get rid of the arcane notion of referring to the screen as the "shell"
* Array and Dictionary are kvec_t:s, so define them as such.
* Allow kvec_t:s, such as Arrays and Dictionaries, to be allocated with
  a predetermined size within an arena.
* Eliminate redundant capacity checking when filling such kvec_t:s
  with values.
This commit is contained in:
bfredl
2022-06-08 22:02:02 +02:00
parent b2ed439bd5
commit 5d69872105
22 changed files with 614 additions and 271 deletions
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9
src/nvim/message.c
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@@ -1068,6 +1068,7 @@ void ex_messages(void *const eap_p)
}
}
ui_call_msg_history_show(entries);
api_free_array(entries);
msg_ext_history_visible = true;
wait_return(false);
} else {
@@ -1262,11 +1263,11 @@ void wait_return(int redraw)
msg_ext_keep_after_cmdline = true;
}
// If the window size changed set_shellsize() will redraw the screen.
// If the screen size changed screen_resize() will redraw the screen.
// Otherwise the screen is only redrawn if 'redraw' is set and no ':'
// typed.
tmpState = State;
State = oldState; // restore State before set_shellsize
State = oldState; // restore State before screen_resize()
setmouse();
msg_check();
need_wait_return = false;
@@ -3136,12 +3137,13 @@ void msg_ext_ui_flush(void)
msg_ext_emit_chunk();
if (msg_ext_chunks.size > 0) {
ui_call_msg_show(cstr_to_string(msg_ext_kind),
ui_call_msg_show(cstr_as_string((char *)msg_ext_kind),
msg_ext_chunks, msg_ext_overwrite);
if (!msg_ext_overwrite) {
msg_ext_visible++;
}
msg_ext_kind = NULL;
api_free_array(msg_ext_chunks);
msg_ext_chunks = (Array)ARRAY_DICT_INIT;
msg_ext_cur_len = 0;
msg_ext_overwrite = false;
@@ -3155,6 +3157,7 @@ void msg_ext_flush_showmode(void)
if (ui_has(kUIMessages)) {
msg_ext_emit_chunk();
ui_call_msg_showmode(msg_ext_chunks);
api_free_array(msg_ext_chunks);
msg_ext_chunks = (Array)ARRAY_DICT_INIT;
msg_ext_cur_len = 0;
}