fix: display the initial value of the Prompt component correctly

Author: mobily

lua/nui-components/prompt.lua

@@ -2,7 +2,7 @@ local Text = require("nui.text")
 local TextInput = require("nui-components.text-input")
 local fn = require("nui-components.utils.fn")
 
-local Prompt = TextInput:extend("Gap")
+local Prompt = TextInput:extend("Prompt")
 
 function Prompt:init(props, popup_options)
   Prompt.super.init(
@@ -37,30 +37,38 @@ end
 function Prompt:_attach_change_listener()
   local props = self:get_props()
 
+  self._private.once = true
+
   vim.api.nvim_buf_attach(self.bufnr, false, {
     on_lines = self:if_not_mounting_phase_wrap(function()
       local prefix_length = self._private.prefix:length()
-      local value_with_prompt = vim.api.nvim_buf_get_lines(self.bufnr, 0, 1, false)[1]
+
+      local lines = vim.api.nvim_buf_get_lines(self.bufnr, 0, -1, false)
+      local value_with_prompt = table.concat(lines, "")
       local value = string.sub(value_with_prompt, prefix_length + 1)
 
-      self:set_current_value(value)
-      props.on_change(value, self)
+      if not self._private.once then
+        self:set_current_value(value)
+        props.on_change(value, self)
+      end
 
       self:_update_placeholder()
 
-      if prefix_length > 0 then
+      if prefix_length > 0 and self._private.once then
         vim.schedule(function()
           self._private.prefix:highlight(self.bufnr, self.ns_id, 1, 0)
+          self._private.once = false
         end)
       end
     end),
   })
 end
 
-function Prompt:on_renderer_initialization(...)
-  Prompt.super.on_renderer_initialization(self, ...)
-
+function Prompt:on_mount()
   local props = self:get_props()
+
+  Prompt.super.on_mount(self)
+
   local function is_nui_text(value)
     return value.class and value.class.name == "NuiText"
   end
@@ -69,6 +77,21 @@ function Prompt:on_renderer_initialization(...)
   vim.fn.prompt_setprompt(self.bufnr, self._private.prefix:content())
 end
 
+function Prompt:on_update()
+  local mode = vim.fn.mode()
+  local current_winid = vim.api.nvim_get_current_win()
+
+  if not (current_winid == self.winid and mode == "i") then
+    vim.schedule(function()
+      if self:is_first_render() then
+        local value = table.concat(self:get_lines(), "")
+        vim.api.nvim_feedkeys(value, "n", true)
+        vim.api.nvim_win_set_cursor(self.winid, { 1, #value })
+      end
+    end)
+  end
+end
+
 function Prompt:mappings()
   local props = self:get_props()