feat(ui): add vim.ui.input and use in lsp rename (#15959)

* vim.ui.input is an overridable function that prompts for user input
* take an opts table and the `on_confirm` callback, see `:help vim.ui.input` for more details
* defaults to a wrapper around vim.fn.input(opts)
* switches the built-in client's rename handler to use vim.ui.input by default

1 files changed, 21 insertions, 9 deletions

diff --git a/runtime/lua/vim/lsp/buf.lua b/runtime/lua/vim/lsp/buf.lua
index 128f0b01ad..b0348e8307 100644
--- a/runtime/lua/vim/lsp/buf.lua
+++ b/runtime/lua/vim/lsp/buf.lua
@@ -247,22 +247,35 @@ end
 --- Renames all references to the symbol under the cursor.
 ---
 ---@param new_name (string) If not provided, the user will be prompted for a new
----name using |input()|.
+---name using |vim.ui.input()|.
 function M.rename(new_name)
-  local params = util.make_position_params()
+  local opts = {
+    prompt = "New Name: "
+  }
+
+  ---@private
+  local function on_confirm(input)
+    if not (input and #input > 0) then return end
+    local params = util.make_position_params()
+    params.newName = input
+    request('textDocument/rename', params)
+  end
+
   local function prepare_rename(err, result)
     if err == nil and result == nil then
       vim.notify('nothing to rename', vim.log.levels.INFO)
       return
     end
     if result and result.placeholder then
-      new_name = new_name or npcall(vfn.input, "New Name: ", result.placeholder)
+      opts.default = result.placeholder
+      if not new_name then npcall(vim.ui.input, opts, on_confirm) end
     elseif result and result.start and result['end'] and
       result.start.line == result['end'].line then
       local line = vfn.getline(result.start.line+1)
       local start_char = result.start.character+1
       local end_char = result['end'].character
-      new_name = new_name or npcall(vfn.input, "New Name: ", string.sub(line, start_char, end_char))
+      opts.default = string.sub(line, start_char, end_char)
+      if not new_name then npcall(vim.ui.input, opts, on_confirm) end
     else
       -- fallback to guessing symbol using <cword>
       --
@@ -270,13 +283,12 @@ function M.rename(new_name)
       -- returns an unexpected response, or requests for "default behavior"
       --
       -- see https://microsoft.github.io/language-server-protocol/specification#textDocument_prepareRename
-      new_name = new_name or npcall(vfn.input, "New Name: ", vfn.expand('<cword>'))
+      opts.default = vfn.expand('<cword>')
+      if not new_name then npcall(vim.ui.input, opts, on_confirm) end
     end
-    if not (new_name and #new_name > 0) then return end
-    params.newName = new_name
-    request('textDocument/rename', params)
+    if new_name then on_confirm(new_name) end
   end
-  request('textDocument/prepareRename', params, prepare_rename)
+  request('textDocument/prepareRename', util.make_position_params(), prepare_rename)
 end
 
 --- Lists all the references to the symbol under the cursor in the quickfix window.