perf: use `vim.ui` instead of `vim.fn`

autoload/libmodal.vim

@@ -1,21 +1,3 @@
-" SUMMARY:
-" * Get user input with some `completions`.
-" PARAMS:
-" * `indicator` => the prompt string.
-" * `completions` => the list of completions to provide.
-" RETURNS:
-" * Input from `input()`.
-function! libmodal#_inputWith(indicator, completions)
-	function! LibmodalCompletionsProvider(argLead, cmdLine, cursorPos) abort closure
-		return luaeval(
-		\	'require("libmodal/src/Prompt").createCompletionsProvider(_A[1])(_A[2], _A[3], _A[4])',
-		\	[a:completions, a:argLead, a:cmdLine, a:cursorPos]
-		\)
-	endfunction
-
-	return input(a:indicator, '', 'customlist,LibmodalCompletionsProvider')
-endfunction
-
 " SUMMARY:
 " * Runs the nvim-libmodal command prompt loop. The function takes an optional
 "   argument specifying how many times to run (runs until exiting by default).

lua/libmodal/src/Prompt.lua

@@ -72,28 +72,28 @@ function _metaPrompt:_inputLoop()
 	-- clear previous `echo`s.
 	utils.api.nvim_redraw()
 
-	-- define a placeholder for user input
-	local userInput = ''
+	-- determine what to do with the input
+	local function userInputCallback(userInput)
+		if userInput and string.len(userInput) > 0 then -- The user actually entered something.
+			self.input:nvimSet(userInput)
+			self:_executeInstruction(userInput)
+		else -- indicate we want to leave the prompt
+			return false
+		end
+
+		return true
+	end
 
 	-- echo the highlighting
 	vim.api.nvim_command('echohl ' .. self.indicator.hl)
 
 	-- set the user input variable
-	if self._completions then userInput =
-		vim.fn['libmodal#_inputWith'](self.indicator.str, self._completions)
-	else userInput =
-		vim.fn.input(self.indicator)
+	if self._completions then
+		vim.api.nvim_command('echo "' .. self.indicator.str .. '"')
+		return vim.ui.select(self._completions, {}, userInputCallback)
+	else
+		return vim.ui.input({prompt = self.indicator.str}, userInputCallback)
 	end
-
-	-- determine what to do with the input
-	if string.len(userInput) > 0 then -- The user actually entered something.
-		self.input:nvimSet(userInput)
-		self:_executeInstruction(userInput)
-	else -- indicate we want to leave the prompt
-		return false
-	end
-
-	return true
 end
 
 ----------------------------