fix(select)(builtin): display the prompt

README.md

@@ -45,7 +45,7 @@ On versions prior to 0.6, this plugin will act as a polyfill for `vim.ui`
 
 `vim.select` (built-in)
 
-![Screenshot from 2021-12-02 19-50-50](https://user-images.githubusercontent.com/506791/144542327-c7420501-c75d-40de-9fc8-70204ed16589.png)
+![Screenshot from 2021-12-04 17-14-32](https://user-images.githubusercontent.com/506791/144729527-ede0d7ba-a6e6-41e0-be5a-1a5f16d35b05.png)
 
 ## Installation
 dressing.nvim supports all the usual plugin managers

lua/dressing/select/builtin.lua

@@ -27,13 +27,14 @@ M.select = function(config, items, opts, on_choice)
   end
   vim.api.nvim_buf_set_lines(bufnr, 0, -1, true, lines)
   vim.api.nvim_buf_set_option(bufnr, "modifiable", false)
+  local width = util.calculate_width(max_width, config)
   local winopt = {
     relative = config.relative,
     anchor = config.anchor,
     row = config.row,
     col = config.col,
     border = config.border,
-    width = util.calculate_width(max_width, config),
+    width = width,
     height = util.calculate_height(#lines, config),
     zindex = 150,
     style = "minimal",
@@ -43,6 +44,29 @@ M.select = function(config, items, opts, on_choice)
   vim.api.nvim_win_set_option(winnr, "cursorline", true)
   pcall(vim.api.nvim_win_set_option, winnr, "cursorlineopt", "both")
 
+  -- Create the title window once the main window is placed.
+  -- Have to defer here or the title will be in the wrong location
+  vim.defer_fn(function()
+    local titlebuf = vim.api.nvim_create_buf(false, true)
+    vim.api.nvim_buf_set_lines(titlebuf, 0, -1, true, { " " .. opts.prompt })
+    vim.api.nvim_buf_set_option(titlebuf, "bufhidden", "wipe")
+    local prompt_width = math.min(width, 2 + vim.api.nvim_strwidth(opts.prompt))
+    local titlewin = vim.api.nvim_open_win(titlebuf, false, {
+      relative = "win",
+      win = winnr,
+      width = prompt_width,
+      height = 1,
+      row = -1,
+      col = (width - prompt_width) / 2,
+      focusable = false,
+      zindex = 151,
+      style = "minimal",
+      noautocmd = true,
+    })
+    vim.api.nvim_buf_set_var(bufnr, "dressing_title_window", titlewin)
+    vim.api.nvim_win_set_option(titlewin, "winblend", config.winblend)
+  end, 5)
+
   local function map(lhs, rhs)
     vim.api.nvim_buf_set_keymap(bufnr, "n", lhs, rhs, { silent = true, noremap = true })
   end
@@ -51,24 +75,32 @@ M.select = function(config, items, opts, on_choice)
   map("<C-c>", [[<cmd>lua require('dressing.select.builtin').cancel()<CR>]])
   map("<Esc>", [[<cmd>lua require('dressing.select.builtin').cancel()<CR>]])
   vim.cmd([[
-      autocmd BufLeave <buffer> ++nested ++once lua require('dressing.select.builtin').cancel()
+    autocmd BufLeave <buffer> ++nested ++once lua require('dressing.select.builtin').cancel()
   ]])
 end
 
+local function close_window()
+  local callback = _callback
+  local items = _items
+  clear_callback()
+  local ok, titlewin = pcall(vim.api.nvim_buf_get_var, 0, "dressing_title_window")
+  if ok and vim.api.nvim_win_is_valid(titlewin) then
+    vim.api.nvim_win_close(titlewin, true)
+  end
+  vim.api.nvim_win_close(0, true)
+  return callback, items
+end
+
 M.choose = function()
   local cursor = vim.api.nvim_win_get_cursor(0)
   local idx = cursor[1]
-  local item = _items[idx]
-  local callback = _callback
-  clear_callback()
-  vim.api.nvim_win_close(0, true)
+  local callback, items = close_window()
+  local item = items[idx]
   callback(item, idx)
 end
 
 M.cancel = function()
-  local callback = _callback
-  clear_callback()
-  vim.api.nvim_win_close(0, true)
+  local callback = close_window()
   callback(nil, nil)
 end