fix: use :startinsert instead of feedkeys to switch to terminal mode

Author: phanen

lua/fzf-lua/fzf.lua

@@ -183,12 +183,7 @@ function M.raw_fzf(contents, fzf_cli_args, opts)
     if fzfwin then fzfwin:update_statusline() end
 
     -- See note in "ModeChanged" above
-    if vim.api.nvim_get_mode().mode == "t" then
-      -- Called from another fzf-win most likely
-      utils.feed_keys_termcodes("i")
-    else
-      vim.cmd [[startinsert]]
-    end
+    utils.ensure_startinsert()
   end
 
   return coroutine.yield()

lua/fzf-lua/utils.lua

@@ -1663,5 +1663,27 @@ end
 ---@class fzf-lua.wo: vim.wo,{}
 M.wo = new_win_opt_accessor()
 
+---@param bufnr integer?
+---@param retry integer?
+---@param timeout integer?
+---@return any
+function M.ensure_startinsert(bufnr, retry, timeout)
+  bufnr = bufnr or vim.api.nvim_get_current_buf()
+  local function ensure_startinsert(_retry, _timeout)
+    if _retry == 0 then return end
+    -- abort for some reason we switch to another buffer
+    if vim.api.nvim_get_current_buf() ~= bufnr then return end
+    if vim.api.nvim_get_mode().mode ~= "t" then
+      pcall(vim.cmd.startinsert)
+      return
+    end
+    -- Called from another fzf-win most likely
+    -- don't startinsert until we enter new terminal mode
+    return vim.defer_fn(function()
+      return ensure_startinsert(_retry - 1, math.min(100, _timeout * 2))
+    end, _timeout)
+  end
+  return ensure_startinsert(retry or 5, timeout or 10)
+end
 
 return M