🐛 Wait debounced redraw before echo to fix flush

Close #77

Author: lambdalisue

denops_std/helper/echo.ts

@@ -27,13 +27,6 @@ async function echoVim(denops: Denops, message: string): Promise<void> {
   await load(denops, new URL("./echo.vim", import.meta.url));
   const waiter = deferred<void>();
   const id = anonymous.once(denops, () => waiter.resolve())[0];
-  await denops.cmd(
-    `call timer_start(0, { -> DenopsStdHelperEcho(l:message, l:name, l:id) })`,
-    {
-      message,
-      name: denops.name,
-      id,
-    },
-  );
+  await denops.call("DenopsStdHelperEcho", message, denops.name, id);
   await waiter;
 }

denops_std/helper/echo.vim

@@ -3,15 +3,23 @@ if exists('g:loaded_denops_std_helper_echo')
 endif
 let g:loaded_denops_std_helper_echo = 1
 
+" Redraw debounce interval defined in denops.vim
+" https://github.com/vim-denops/denops.vim/pull/90
+let s:redraw_interval = 10
+
 function! DenopsStdHelperEcho(message, name, id) abort
   let info = {}
-  let info.t = timer_start(0, { -> feedkeys('jk', 'n') })
   let info.name = a:name
   let info.id = a:id
   let info.message = a:message
   let info.updatetime = &updatetime
-  let &updatetime = 1
   let s:denops_std_helper_echo_info = info
+  " Wait s:redraw_interval + alpha to avoid debounced
+  " `redraw` call after RPC. See #77 for details.
+  " https://github.com/vim-denops/deno-denops-std/issues/77
+  let &updatetime = float2nr(ceil(s:redraw_interval * 1.5))
+  " Reset Vim's internal timer for 'updatetime'
+  call feedkeys('jk', 'n')
   augroup denops_std_helper_echo
     autocmd!
     autocmd CursorHold * ++once call s:denops_std_helper_echo_post()
@@ -22,7 +30,6 @@ function! s:denops_std_helper_echo_post() abort
   let info = s:denops_std_helper_echo_info
   silent! unlet! s:denops_std_helper_echo_info
   let &updatetime = info.updatetime
-  call timer_stop(info.t)
   redraw | echo info.message
   call denops#request(info.name, info.id, [])
 endfunction