feat: chat buftype=prompt option (resolve: #94)

Author: Robitx

lua/gp/config.lua

@@ -121,6 +121,8 @@ local config = {
 	chat_finder_pattern = "topic ",
 	-- if true, finished ChatResponder won't move the cursor to the end of the buffer
 	chat_free_cursor = false,
+	-- use prompt buftype for chats (:h prompt-buffer)
+	chat_prompt_buf_type = false,
 
 	-- how to display GpChatToggle or GpContext: popup / split / vsplit / tabnew
 	toggle_target = "vsplit",

lua/gp/init.lua

@@ -1401,6 +1401,14 @@ M.prep_chat = function(buf, file_name)
 
 	M.prep_md(buf)
 
+	if M.config.chat_prompt_buf_type then
+		vim.api.nvim_buf_set_option(buf, "buftype", "prompt")
+		vim.fn.prompt_setprompt(buf, "")
+		vim.fn.prompt_setcallback(buf, function()
+			M.cmd.ChatRespond({ args = "" })
+		end)
+	end
+
 	-- setup chat specific commands
 	local range_commands = {
 		{