feat: show completion window after accept if on trigger character

closes #198

lua/blink/cmp/accept/init.lua

@@ -43,10 +43,12 @@ local function accept(item)
     -- todo: since we apply the additional text edits after, auto imported functions will not
     -- get auto brackets. If we apply them before, we have to modify the textEdit to compensate
     brackets_lib.add_brackets_via_semantic_token(vim.bo.filetype, item, function()
+      require('blink.cmp.trigger.completion').show_if_on_trigger_character()
       require('blink.cmp.trigger.signature').show_if_on_trigger_character()
       text_edits_lib.apply_additional_text_edits(item)
     end)
   else
+    require('blink.cmp.trigger.completion').show_if_on_trigger_character()
     require('blink.cmp.trigger.signature').show_if_on_trigger_character()
     text_edits_lib.apply_additional_text_edits(item)
   end

lua/blink/cmp/trigger/completion.lua

@@ -152,6 +152,14 @@ function trigger.suppress_events_for_callback(cb)
     and is_insert_mode
 end
 
+function trigger.show_if_on_trigger_character()
+  local cursor_col = vim.api.nvim_win_get_cursor(0)[2]
+  local char_under_cursor = vim.api.nvim_get_current_line():sub(cursor_col, cursor_col)
+  local is_on_trigger = vim.tbl_contains(sources.get_trigger_characters(), char_under_cursor)
+  if is_on_trigger then trigger.show({ trigger_character = char_under_cursor }) end
+  return is_on_trigger
+end
+
 --- @param opts { trigger_character?: string, send_upstream?: boolean, force?: boolean } | nil
 function trigger.show(opts)
   opts = opts or {}